1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.5
28 * Startup Changes in Emacs 24.5
31 * Changes in Emacs 24.5
34 ** The default value of `history-length' has increased to 100.
37 * Editing Changes in Emacs 24.5
40 * Changes in Specialized Modes and Packages in Emacs 24.5
43 ** The Rmail commands d, C-d and u now handle repeat counts
44 to delete or undelete multiple messages.
46 * New Modes and Packages in Emacs 24.5
49 * Incompatible Lisp Changes in Emacs 24.5
52 * Lisp Changes in Emacs 24.5
55 * Changes in Emacs 24.5 on Non-Free Operating Systems
58 * Installation Changes in Emacs 24.4
61 ** Emacs can now be compiled with ACL support.
62 This happens by default if a suitable support library is found at
63 build time, like libacl on GNU/Linux. To prevent this, use the
64 configure option `--disable-acl'. See below for related features.
67 ** Emacs can now be compiled with file notification support.
68 This happens by default if a suitable system library is found at
69 build time. To prevent this, use the configure option
70 `--without-file-notification'. See below for file-notify features.
71 This feature is not available for the Nextstep port.
74 ** Emacs can now be compiled with zlib support.
75 This happens by default if zlib is present, which it normally is.
76 To prevent this, use the configure option `--without-zlib'.
77 This provides the function `zlib-decompress-region'; see below for details.
80 ** The configure option `--without-compress-info' has been generalized,
81 and renamed to `--without-compress-install'. It now prevents compression
82 of _any_ files during installation.
85 ** The configure option `--with-crt-dir' has been removed.
86 It is no longer needed, as the crt*.o files are no longer linked specially.
89 ** Directories passed to configure option `--enable-locallisppath' are
90 no longer created during installation.
93 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
94 This requires pkg-config to be available at build time.
97 * Startup Changes in Emacs 24.4
100 ** When initializing `load-path', an empty element in the EMACSLOADPATH
101 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
102 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
103 load-path (the one that would have been used if EMACSLOADPATH was unset).
104 This makes it easier to _extend_ the load-path via EMACSLOADPATH
105 (previously, EMACSLOADPATH had to specify the complete load-path,
106 including the defaults). (In older versions of Emacs, an empty element
107 was replaced by ".", so use an explicit "." now if that is what you want.)
110 ** The -L option, which normally prepends its argument to load-path,
111 will instead append, if the argument begins with `:' (or `;' on MS Windows;
112 i.e., `path-separator').
115 ** If you use either site-load.el or site-init.el to customize the dumped
116 Emacs executable, any changes to `load-path' that these files make
117 will no longer be present after dumping. To affect a permanent change
118 to `load-path', use the `--enable-locallisppath' option of `configure'.
121 ** The user option `initial-buffer-choice' can now specify a function
122 to set up the initial buffer.
125 * Changes in Emacs 24.4
128 ** New function `zlib-decompress-region', which decompresses gzip- and
129 zlib-format compressed data using built-in zlib support, if available.
132 ** New option `gnutls-verify-error', if non-nil, means that Emacs
133 should reject SSL/TLS certificates that GnuTLS determines as invalid.
134 (This option defaults to nil at present, but this is expected to change
135 in a future release.)
138 ** Emacs now supports menus on text-mode terminals.
139 If the terminal supports a mouse, clicking on the menu bar, or on
140 sensitive portions of the mode line or header line, will drop down the
141 menu defined at that position. Likewise, clicking C-mouse-2 or
142 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
145 If the text terminal does not support a mouse, you can activate the
146 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
148 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
149 customize the option `tty-menu-open-use-tmm' to a non-nil value.
150 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
154 ** The *Messages* buffer is created in `messages-buffer-mode',
155 a new major mode, with read-only status. Any code that might create
156 the *Messages* buffer should call the function `messages-buffer' to do
157 so and set up the mode.
160 ** Emacs can now support ACLs (access control lists).
161 This requires a suitable support library to be found at build time.
162 On GNU/Linux, the POSIX ACL interface is used via libacl.
163 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
166 *** Emacs preserves the ACL entries of files when backing up.
168 *** New functions `file-acl' and `set-file-acl' get and set the ACL
171 ** Multi-monitor support has been added.
174 *** New functions `display-monitor-attributes-list' and
175 `frame-monitor-attributes' can be used to obtain information about
176 each physical monitor on multi-monitor setups.
179 *** The functions `display-pixel-width' and `display-pixel-height' now
180 behave consistently among the platforms: they return the pixel width
181 or height for all physical monitors associated with the given display
182 as if they were on X. To get information for each physical
183 monitor, use the new functions above. Similar notes also apply to
184 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
185 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
188 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
189 You can change the default by customizing `blink-cursor-blinks'.
192 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
193 This affects View mode, etc.
198 *** The command `apropos-variable' is renamed to `apropos-user-option'.
199 `apropos-user-option' shows all user options while `apropos-variable'
200 shows all variables. When called with a universal prefix argument,
201 the two commands swap their behaviors. When `apropos-do-all' is
202 non-nil, they output the same results.
205 *** The key `?' now describes prefix bindings, like `C-h'.
208 *** The command `describe-function' has been extended for EIEIO.
209 Running it on constructors will show a full description of the
210 generated class. For generic functions, it will show all
211 implementations together with links to the source. The old commands
212 `describe-class', `describe-constructor' and `describe-generic' were
216 *** The function `quail-help' is no longer an interactive command.
217 Use `C-h C-\' (`describe-input-method') instead.
222 *** ImageMagick images now support the :max-width and :max-height keywords.
225 *** When using `create-image' with image data, you can pass a :format
226 attribute (via the property-list argument) in order to help
227 ImageMagick detect the image type. The value should be a MIME
228 content-type that is found in the new variable `image-format-suffixes'.
230 ** Frame and window changes
233 *** The function `window-in-direction' introduced in Emacs 24.1 now
234 takes additional arguments for specifying a reference point, wrapping
235 selection around frame borders, and specifying ways to select the
239 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
240 bound to <f11> and M-<f10>, respectively.
243 *** New hooks `focus-in-hook', `focus-out-hook'.
244 These are normal hooks run when an Emacs frame gains or loses input focus.
247 *** Emacs can now change frame sizes in units of pixels, rather than
248 text rows or columns. When maximizing a frame or making it fullscreen,
249 remaining extra pixels are no longer given to the minibuffer, the rightmost
250 fringe, or other unusable space, but are distributed among the text
251 areas of the frame's windows. If the new option `frame-resize-pixelwise'
252 is non-nil, all frame size changes happen pixelwise and set the
253 corresponding size hints for the window manager.
256 *** Emacs can now change window sizes in units of pixels.
257 Mouse-dragging a mode line or window divider now changes the size of
258 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
259 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
260 resize windows pixelwise. Most functions for changing or accessing
261 window sizes now have an additional argument that allows changes to apply,
262 or values to be returned, in pixels instead of lines/columns.
265 *** The functions `window-body-height' and `window-body-width' now never
266 count partially visible lines or columns if called with a nil PIXELWISE
270 *** Emacs can now draw dividers between adjacent windows. To put
271 dividers between side-by-side/vertically stacked windows customize the
272 frame parameters `right-divider-width' and `bottom-divider-width' to
273 some positive integer. You can drag dividers with the mouse (they show
274 a corresponding cursor when the mouse hovers over them). You can change
275 the appearance of dividers by customizing the faces `window-divider',
276 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
277 two are useful to provide a 3D effect, or to better distinguish dividers
278 from surrounding display objects.
281 *** New functions are provided to return the pixel sizes of window
282 components, namely `window-scroll-bar-width', `window-mode-line-height'
283 `window-header-line-height', `window-right-divider-width' and
284 `window-bottom-divider-width'.
287 *** The new function `window-text-pixel-size' returns the size of the
288 text of a window's buffer in pixels. This allows functions like
289 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
290 window to its buffer as it will be displayed.
293 *** `fit-window-to-buffer' can now resize windows in both dimensions.
294 This behavior is controlled by the new option
295 `fit-window-to-buffer-horizontally'. The new option
296 `fit-frame-to-buffer' allows to fit the window's frame to its buffer.
299 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
300 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
301 control the size of the frame and its position on screen.
304 *** Temp Buffer Resize Mode can now adjust height and width of windows
305 and frames. `temp-buffer-resize-mode' is now able to adjust the height
306 and the width of a window displaying a temporary buffer. The new option
307 `temp-buffer-max-width' allows to control the width of temporary buffer
308 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
309 and the buffer appears in the root window of a frame, Temp Buffer Resize
310 Mode will try to adjust width and/or height of the frame.
313 *** `split-window' is now a non-interactive function, not a command.
314 As a command, it was a special case of `C-x 2' (`split-window-below'),
315 and as such superfluous. After being reimplemented in Lisp, its
316 interactive form was mistakenly retained.
319 *** The functions `window-size' and `window-total-size' now have an
320 optional argument to return a rounded size value.
323 *** `window-state-put' now allows to put a window state into internal
327 *** New option `scroll-bar-adjust-thumb-portion'.
328 Available only on X, this option allows to control over-scrolling
329 using the scroll bar (i.e. dragging the thumb down even when the end
330 of the buffer is visible).
333 *** New basic action function `display-buffer-in-previous-window' has
334 `display-buffer' display a buffer in a window previously showing that
338 *** New basic action function `display-buffer-at-bottom' has
339 `display-buffer' choose or make a window at the bottom of the selected
343 *** New display action function `display-buffer-no-window' to not
344 display the buffer in a window.
347 *** New display action alist entry `allow-no-window' to indicate the
348 caller of `display-buffer' is ready to handle the case of not
349 displaying the buffer in a window.
351 ** Lisp evaluation changes
353 *** `eval-defun' on an already defined defcustom calls the :set function,
357 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
358 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
359 zero prefix argument. This disables truncation of lists in the output,
360 equivalent to setting `(eval-expression-)print-length' and
361 `(eval-expression-)print-level' to nil. Additionally, it causes integers
362 to be printed in other formats (octal, hexadecimal, and character).
365 *** New hook `eval-expression-minibuffer-setup-hook' run by
366 `eval-expression' on entering the minibuffer.
369 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
372 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
373 because it affects caching of paragraph scanning results as well.
374 There is no reason to set this to nil except for debugging purposes.
377 ** The option `set-mark-default-inactive' has been deleted.
378 This unfinished feature was introduced by accident in Emacs 23.1;
379 simply disabling Transient Mark mode does the same thing.
382 ** The default value of `comment-use-global-state' is now t,
383 and this variable has been marked obsolete.
386 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
387 and works for git too, if you fetch the repository notes.
390 ** New option `load-prefer-newer' affects how the `load' function chooses
391 the file to load. If this is non-nil, then when both .el and .elc
392 versions of a file exist, and the caller did not explicitly specify
393 which one to load, then the newer file is loaded. The default, nil,
394 means to always load the .elc file.
397 * Editing Changes in Emacs 24.4
399 ** Indentation changes
402 *** `electric-indent-mode' is now enabled by default.
403 E.g., typing RET reindents the current line and indents the new line.
404 `C-j' inserts a newline but does not indent.
407 *** New buffer-local `electric-indent-local-mode'.
410 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
411 When invoked without a prefix argument, it now activates a transient
412 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
413 the text indentation in the region. Typing any other key resumes
414 normal editing behavior.
417 *** `tab-stop-list' is now implicitly extended to infinity by repeating
418 the last step. Its default value is changed to nil, which means a tab
419 stop every `tab-width' columns.
422 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
423 When called in succession, it cycles between spacing conventions:
424 one space, no spaces, original spacing.
427 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
428 a line after a one-letter word, which is an error in some typographical
429 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
432 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
435 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
436 Most commands are still unaware of it, but kill/yank do work on the rectangle.
439 ** New option `visual-order-cursor-movement'.
440 If this is non-nil, cursor motion with arrow keys will follow the
441 visual order of characters on the screen: <left> always moves to the
442 left, <right> always moves to the right, disregarding the surrounding
443 bidirectional context.
448 *** All interactive commands that read a register (`copy-to-register', etc.)
449 now display a temporary window after `register-preview-delay' seconds
450 that summarizes existing registers. To disable this, set that option to nil.
451 Interactive commands that read registers and want to make use of this
452 should use `register-read-with-preview' to read register names.
455 *** New command `frameset-to-register' bound to `C-x r f', replacing
456 `frame-configuration-to-register'. It offers similar functionality,
457 plus enhancements like the ability to restore deleted frames.
458 (`frame-configuration-to-register' still exists, but no longer has a
462 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
466 ** New command `delete-duplicate-lines'.
467 This searches the region for identical lines, and removes all but one
468 copy of each repeated line. The lines need not be sorted.
471 ** `blink-matching-paren' now only highlights the matching open-paren
472 by default, instead of moving cursor. Set this variable to `jump' to
473 enable the old behavior.
476 * Changes in Specialized Modes and Packages in Emacs 24.4
479 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
481 ~/.emacs.d/timelog replaces ~/.timelog
482 ~/.emacs.d/vip replaces ~/.vip
483 ~/.emacs.d/viper replaces ~/.viper
484 ~/.emacs.d/ido.last replaces ~/.ido.last
485 ~/.emacs.d/kkcrc replaces ~/.kkcrc
486 ~/.emacs.d/quickurls replaces ~/.quickurls
487 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
488 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
489 ~/.emacs.d/places replaces ~/.emacs-places
490 ~/.emacs.d/shadows replaces ~/.shadows
491 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
492 ~/.emacs.d/strokes replaces ~/.strokes
493 ~/.emacs.d/notes replaces ~/.notes
494 ~/.emacs.d/type-break replaces ~/.type-break
495 Also the following files used by the now obsolete otodo-mode.el:
496 ~/.emacs.d/todo-do replaces ~/.todo-do
497 ~/.emacs.d/todo-done replaces ~/.todo-done
498 ~/.emacs.d/todo-top replaces ~/.todo-top
500 ** Backtrace and debugger
503 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
504 display of local variables of the current stack frame.
507 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
508 the lexical environment when evaluating the code in the context at point
509 (and so allows you to access lexical variables).
512 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
515 ** Battery information can now be retrieved from BSD's `apm' utility.
518 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
520 ** Calendar and Diary
523 *** New faces `calendar-weekday-header', `calendar-weekend-header',
524 and `calendar-month-header'.
527 *** New option `calendar-day-header-array'.
530 *** New variable `diary-from-outlook-function', used by the command
531 `diary-from-outlook'.
534 *** The variable `calendar-font-lock-keywords' is obsolete.
539 *** Calc by default now uses the Gregorian calendar for all dates, and
540 uses January 1, 1 AD as its day number 1. Previously Calc used the
541 Julian calendar for dates before September 14, 1752, and it used
542 December 31, 1 BC as its day number 1; the new scheme is more
543 consistent with Calendar's calendrical system and day numbering.
546 *** The new option `calc-gregorian-switch' lets you configure if
547 (and when) Calc switches from the Julian to the Gregorian calendar.
550 *** Support for ISO 8601 dates.
557 **** The cpp-root project now supports executing a compile command.
558 It can be set through the new :compile-command slot or the
559 buffer-local variable `compile-command'.
562 **** Better selection of include directories for the 'linux' project.
563 Include directories now support out-of-tree build directories and
564 target architecture auto-detection.
569 **** Improved detection of used namespaces in current scope in C++.
571 **** Parsing of default values for variables and function arguments in C/C++.
572 They are also displayed by the summarize feature in the mode line.
574 **** Improved parsing of function pointers in C/C++.
575 This also includes parsing of function pointers as function arguments.
577 **** Parsing of C/C++ preprocessor macros that open new scope.
578 For example, this enables parsing of macros that open new namespaces.
580 **** Support for 'this' pointer in inline member functions in C++.
585 *** New macro `cl-tagbody'.
586 This executes statements while allowing for control transfer to labels.
589 *** letf is now just an alias for cl-letf.
594 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
595 Hence, you can now enable it independently from those modes, and from
596 `transient-mark-mode'.
599 *** `cua-highlight-region-shift-only' is now obsolete.
600 You can disable `transient-mark-mode' to get the same result.
603 *** CUA's rectangles can now be used without CUA by calling the command
604 `cua-rectangle-mark-mode'.
609 *** Support for completion, ElDoc, and Flycheck has been added.
612 *** The current CFEngine syntax is parsed from "cf-promises -s json".
613 There is a fallback syntax available if you don't have cf-promises or
614 if your version doesn't support that option. See option `cfengine-cf-promises'.
617 ** Delete Selection mode can now be used without Transient Mark mode.
622 *** `desktop-save-mode' by default now auto-saves an existing desktop file
623 after `desktop-auto-save-timeout'. To disable this, customize that option
627 *** Desktop now saves and restores the frame/window configuration.
628 To disable this, set `desktop-restore-frames' to nil.
629 See also related options `desktop-restore-reuses-frames',
630 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
633 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
634 such as file ownership or permissions, are visible.
637 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
638 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
639 The results display in the mode line.
641 ** Electric Pair mode
644 *** New option `electric-pair-preserve-balance', enabled by default.
645 If non-nil, pairing/skipping only kicks in when that help the balance
646 of parentheses and quotes, i.e. the buffer should end up at least as
649 You can further control this behavior by adjusting the predicates
650 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
653 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
654 In `electric-pair-mode', the commands `backward-delete-char' and
655 `backward-delete-char-untabify' are now bound to electric variants
656 that delete the closer when invoked between adjacent pairs.
659 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
660 In `electric-pair-mode', inserting a newline between adjacent pairs
661 opens an extra newline after point, which is indented if
662 `electric-indent-mode' is also set.
665 *** New option `electric-pair-skip-whitespace', enabled by default.
666 This controls if skipping over closing delimiters should jump over any
667 whitespace slack. Setting it to `chomp' makes it delete this
668 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
671 *** New variables control the pairing in strings and comments.
672 You can customize `electric-pair-text-pairs' and
673 `electric-pair-text-syntax-table' to tweak pairing behavior inside
674 strings and comments.
677 ** New EPA option `epa-mail-aliases'.
678 You can set this to a list of email address aliases that `epa-mail-encrypt'
679 should use to find keys.
682 ** New ERC option `erc-accidental-paste-threshold-seconds'.
683 If set to a number, this can be used to avoid accidentally pasting large
684 amounts of data into the ERC input.
687 ** New ERT macro `skip-unless' allows skipping ERT tests.
688 See the ERT manual for details.
693 *** `eshell' now supports visual subcommands and options.
694 Eshell has been able to handle "visual" commands (interactive,
695 non-line oriented commands such as top that require display
696 capabilities not provided by eshell) by running them in an Emacs
697 terminal emulator. See `eshell-visual-commands'.
699 This feature has been extended to subcommands and options that make a
700 usually line-oriented command a visual command. Typical examples are
701 "git log" and "git <command> --help", which display their output in a
702 pager by default. See `eshell-visual-subcommands' and
703 `eshell-visual-options'.
706 *** New Eshell-Tramp module.
707 External su and sudo commands are now the default; the internal,
708 Tramp-using variants can still be used by enabling the eshell-tramp
712 ** New F90 mode option `f90-smart-end-names'.
715 Icomplete is now more similar to Ido.
718 *** Icomplete by default now applies to all forms of minibuffer completion.
719 The variable `icomplete-with-completion-tables' (now a user option)
720 controls this. To restore the old behavior, set it back to
721 '(internal-complete-buffer).
724 *** You can navigate through and select completions using the keys
725 from `icomplete-minibuffer-map'.
728 *** The string that separates potential completions is now a customizable
729 option (`icomplete-separator'). The default is " | " rather than ",".
732 *** New face `icomplete-first-match'; and new options
733 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
736 *** The option `icomplete-show-key-bindings' has been removed.
741 *** An Ido user manual is now included.
744 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
745 This means to use virtual buffers if the current ido input does not match
749 *** The variable `ido-decorations' can optionally have two new elements,
750 which are the brackets to use around the sole remaining completion.
755 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
756 visit the next image file and the previous image file in the same
757 directory, respectively.
760 *** New commands to show specific frames of multi-frame images.
761 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
762 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
765 *** New commands to speed up, slow down, or reverse animation.
766 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
767 speed up and slow down the animation. `a r' (`image-reverse-speed')
768 to reverse it and `a 0' (`image-reset-speed') to reset it.
771 *** The command `image-mode-fit-frame' deletes other windows.
772 When toggling, it restores the frame's previous window configuration.
773 It also has an optional frame argument, which can be used by Lisp
774 callers to fit the image to a frame other than the selected frame.
779 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
780 the symbol found near point.
783 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
784 will cycle through faces in `hi-lock-face-defaults' without prompting.
787 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
792 *** New Info face `info-index-match', used to highlight matches in index
793 entries displayed by `Info-index-next', `Info-virtual-index' and
797 *** The Info-edit command is obsolete. Editing Info nodes by hand
798 has not been relevant for some time.
803 *** New option `js-switch-indent-offset'.
806 *** Better indentation of multiple-variable declarations.
807 If a declaration spans several lines, variables on the following lines
808 are lined up to the first one.
811 *** Recognition and better indentation of continuations in array comprehensions.
814 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
819 *** Font locking for Texinfo comments and new keywords.
821 *** Completion in Octave file buffers.
825 *** Jump to definition.
827 *** Documentation lookup/search.
830 ** OPascal mode is the new name for Delphi mode
833 *** All delphi-* variables and functions have been renamed to opascal-*.
834 Obsolete aliases exist for those likely to have been used externally.
837 *** The option `delphi-newline-always-indents' has been removed.
838 Use `electric-indent-mode' instead.
841 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
846 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
847 to filter the list of packages by a keyword.
850 *** In the `describe-package' buffer, there are now buttons listing the
851 keywords related to the package. Click on a button to see other packages
852 related to that keyword.
855 *** The format of `archive-contents' files, generated by package
856 repositories, has changed to allow a new (fifth) element in the data
857 vectors, containing an associative list with extra properties.
858 (For example, `describe-package' uses the `:url' extra property to
859 display a "Homepage" header.)
862 ** In Prolog mode, `prolog-use-smie' has been removed,
863 along with the non-SMIE indentation code.
868 *** The new command `remember-notes' creates a buffer that is saved on exit.
869 You can use it as a more permanent *scratch* buffer.
872 *** Remember can now store notes in separate files.
873 To use this, add `remember-store-in-files' to the `remember-handler-functions'
874 option. The files are saved in `remember-data-directory' using
875 names specified by `remember-directory-file-name-format'.
880 *** Customize `rmail-mbox-format' to influence some minor aspects of
881 how Rmail displays non-MIME messages.
884 *** The `unrmail' command now converts from BABYL to mboxrd format,
885 rather than mboxo. Customize `unrmail-mbox-format' to change this.
890 *** Improved syntax highlighting and indentation.
893 *** New `electric-indent-mode' integration.
896 *** New option `ruby-encoding-magic-comment-style'.
899 *** New option `ruby-custom-encoding-magic-comment-template'.
902 *** New option `ruby-align-to-stmt-keywords'.
905 *** New option `ruby-align-chained-calls'.
908 *** More Ruby file types have been added to `auto-mode-alist'.
910 ** Search and Replace
913 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
914 starts a symbol (identifier) incremental search forward with the
915 symbol found near point added to the search string initially.
918 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
919 and adds it to the search string.
922 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
925 *** `query-replace' skips invisible text when `search-invisible' is nil,
926 and opens overlays with hidden text when `search-invisible' is `open'.
929 *** A negative prefix arg of replacement commands replaces backward.
930 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
931 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
934 *** By default, prefix arguments do not now terminate Isearch mode.
935 Set `isearch-allow-prefix' to nil to restore old behavior.
938 *** More Isearch commands accept prefix arguments, namely
939 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
943 *** Word search now matches whitespace at the beginning/end
944 of the search string if it contains leading/trailing whitespace.
945 In an incremental word search or when using a non-nil LAX argument
946 of `word-search-regexp', the lax matching can also match part of
947 the first word (in addition to the lax matching of the last word).
948 The same rules are now applied to the symbol search with the difference
949 that it matches symbols, and non-symbol characters between symbols.
952 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
955 ** The shell.el option `explicit-bash-args' includes --noediting by default.
956 All non-ancient Bash versions support this option.
961 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
964 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
969 *** You can customize the SMIE indentation of a mode via `smie-config'.
970 The command `smie-config-guess' can help you derive the appropriate
971 indentation settings, if you provide it with an indented sample file.
972 Use `smie-config-save' to save the result.
975 *** You can customize the SMIE indentation of a file by adding an entry to
976 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
979 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
984 *** Improved login monitoring and appropriate response to login failures.
985 New variable `sql-login-delay' defines maximum wait time for a connection.
988 SQL*Plus script placeholders are properly highlighted and identified
989 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
990 are passed before the logon parameter, as required. The default now
991 includes `-L', to limit the number of logon attempts per invocation.
994 ** New Term mode option `term-suppress-hard-newline'.
997 ** Todo mode has been rewritten and enhanced.
998 The Todo mode user manual describes all commands and most user
999 options. To support some of these features, a new file format is
1000 used, which is incompatible with the old format; however, you can
1001 convert old todo and done item files to the new format on initializing
1002 the first new todo file, or at any later time with the provided
1003 conversion command. The previous version of todo-mode.el has been
1004 renamed to otodo-mode.el and is now obsolete. New features include:
1006 *** Support for multiple todo files and archive files of done items.
1008 *** Renaming, reordering, moving, merging, and deleting categories.
1010 *** Sortable tabular summaries of categories and the item types they contain.
1012 *** Cross-category lists of items filtered by specific criteria.
1014 *** More fine-grained interaction with the Emacs diary, by being able to
1015 decide for each todo item whether it appears in the Fancy Diary display.
1017 *** Highly flexible new item insertion and item editing.
1019 *** Moving items between categories, storing done items in their category
1020 or in archive files, undoing or unarchiving done items.
1022 *** Reprioritizing items by inputting a numerical priority.
1024 *** Extensive customizability of operation and display, including many faces.
1029 *** `trace-function' and `trace-function-background' no longer prompt for
1030 the output buffer. Unless you use a prefix argument, they output to
1034 *** With a prefix argument, `trace-function' and `trace-function-background'
1035 will prompt for a "context". This is a Lisp expression, whose value at the
1036 time the function is entered/exited is printed along with the function's
1042 *** The experimental url syntax for remote file names has been removed.
1045 *** New connection method "adb", which allows to access Android
1046 devices by the Android Debug Bridge. The variable `tramp-adb-program'
1047 can be used to adapt the path of the "adb" program, if needed.
1050 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1051 "scpc" and "rsyncc" are discontinued. The ssh option
1052 "ControlMaster=auto" is set automatically in all ssh-based methods,
1053 when possible. See `tramp-use-ssh-controlmaster-options'.
1056 *** Handlers for `file-acl' and `set-file-acl' for remote machines
1057 which support POSIX ACLs.
1060 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1061 for remote machines which support filesystem notifications.
1064 ** New URL command `url-cookie-list' displays the current cookies,
1065 and allows you to interactively remove cookies.
1067 ** VC and related modes
1070 *** In VC directory mode, `D' displays diffs between VC-controlled
1071 whole tree revisions.
1074 *** In VC directory mode, `L' lists the change log for the current VC
1075 controlled tree in a window.
1078 *** In VC directory mode, `I' shows a log of changes that will be
1079 received with a pull operation.
1082 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1083 under current version control system. When called with a prefix
1084 argument, you can remove a file from the ignored file list.
1089 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1092 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1095 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1096 are obsolete. Customize the `woman-*' faces instead.
1098 ** Obsolete packages
1101 *** iswitchb.el; use icomplete-mode.
1104 *** longlines.el; use visual-line-mode.
1113 *** terminal.el; use term.el instead.
1116 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1119 *** xesam.el (owing to the cancellation of the XESAM project).
1122 *** yow.el; use fortune.el or cookie1.el instead.
1125 * New Modes and Packages in Emacs 24.4
1128 ** New package `eww' is a built-in web browser.
1129 It is only available if Emacs is compiled with libxml2 support.
1132 ** New minor mode `superword-mode'.
1133 This overrides the default word motion commands to treat "symbol_words"
1134 as a single word, similar to what `subword-mode' does.
1137 ** New package nadvice.el offers lighter-weight advice facilities.
1140 *** add-function/remove-function, which can be used to add/remove code on any
1141 function-carrying place, such as process-filters or `<foo>-function' hooks.
1143 *** advice-add/advice-remove to add/remove a piece of advice on a named
1144 function, much like `defadvice' does.
1146 ** New package frameset.el.
1147 It provides a set of operations to save a frameset (the state of all
1148 or a subset of the existing frames and windows, somewhat similar to a
1149 frame configuration), both in-session and persistently, and restore it
1150 at some point in the future.
1153 ** New package filenotify.el provides an interface for file system
1154 notifications. It requires that Emacs be compiled with one of the
1155 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1158 * Incompatible Lisp Changes in Emacs 24.4
1161 ** `kill-region' has lost its `yank-handler' optional argument.
1164 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1165 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1168 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1171 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1172 Some languages match those as »...«, and others as «...», so it is
1173 better for Emacs to stay neutral by default.
1176 ** In compiled Lisp files, the header no longer includes a timestamp.
1179 ** The default file coding for Emacs Lisp files is now utf-8.
1180 (See `file-coding-system-alist'.) In most cases, this change is
1181 transparent, but files that contain unusual characters without
1182 specifying an explicit coding system may fail to load with obscure
1183 errors. You should either convert them to utf-8 or add an explicit
1187 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1188 It used to disable the minor mode, major mode, and text-property keymaps,
1189 whereas now it simply has higher precedence.
1192 ** Default process filters and sentinels are not nil any more.
1193 Instead they default to a function that does what the nil value used to do.
1196 ** `read-event' does not return decoded chars in ttys any more.
1197 As was the case in Emacs 22 and before, the decoding of terminal
1198 input, according to `keyboard-coding-system', is not performed in
1199 `read-event' any more. But unlike in Emacs 22, this decoding is still
1200 done before input-decode-map, function-key-map, etc.
1203 ** The option `inhibit-local-menu-bar-menus' has been removed.
1206 ** Frame-local variables that affect redisplay do not work any more.
1207 More specifically, redisplay does not bother to check for a frame-local
1208 value when looking up variables.
1211 ** nil and "unbound" are indistinguishable in `symbol-function'.
1212 `symbol-function' does not signal a `void-function' error any more.
1213 To determine if a symbol's function definition is void, use `fboundp'.
1216 ** `defadvice' does not honor the `freeze' flag and cannot advise
1217 special-forms any more.
1220 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1221 when lexical binding is enabled. Previously, VAR was bound to nil,
1222 which often led to spurious unused-variable warnings.
1225 ** The return value of `backup-buffer' has changed.
1226 The second argument is no longer an SELinux context, instead it is an
1227 alist of extended attributes as returned by the new function
1228 `file-extended-attributes'. The attributes can be applied to another
1229 file using `set-file-extended-attributes'.
1232 ** By default `copy-file' no longer copies file permission bits to an
1233 existing destination; and it sets the file permission bits of a newly
1234 created destination to those of the source, masked by the default file
1235 permissions. To copy the file permission bits, pass t as the
1236 PRESERVE-PERMISSIONS argument of `copy-file'.
1239 ** `visited-file-modtime' now returns -1 for nonexistent files.
1240 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1241 in the presence of files with negative time stamps.
1244 ** The cars of the elements in `interpreter-mode-alist' are now
1245 treated as regexps rather than literal strings.
1248 * Lisp Changes in Emacs 24.4
1251 ** The second argument of `eval' can now specify a lexical environment.
1254 ** New functions `special-form-p' and `macrop'.
1257 ** New macro `define-alternatives' can be used to define generic commands.
1258 Generic commands are interactive functions whose implementation can be
1259 selected among several alternatives, as a matter of user preference.
1262 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1263 on that symbol will use the associated value as a function to call
1267 ** New variable `enable-dir-local-variables'.
1268 Directory-local variables are ignored if this is nil. This may be
1269 useful for modes that want to ignore directory-locals while still
1270 respecting file-local variables.
1273 ** New function `get-pos-property'.
1276 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1277 as a function to call to provide default values.
1279 ** Completion changes
1282 *** The separator used by `completing-read-multiple' is now a regexp.
1283 The default `crm-separator' has been changed to allow surrounding spaces
1287 *** The `common-substring' argument of `display-completion-list',
1288 which has been documented as obsolete since Emacs 23.1, is now _really_
1289 obsolete, and no longer advertised. Instead either call
1290 `completion-hilit-commonality' to add the highlighting; or use
1291 `completion-all-completions', which returns highlighted strings.
1294 *** New function `completion-table-with-cache' is a wrapper for
1295 `completion-table-dynamic' that caches the result of the last lookup.
1298 *** New function `completion-table-merge' to combine several
1299 completion tables by merging their completions.
1302 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1303 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1304 this replaces the string "lambda" with the Greek lambda character.
1309 *** Functions to pop up menus and dialogs now work on all terminals,
1310 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1311 `message-box', `yes-or-no-p', etc.
1313 The function `display-popup-menus-p' will now return non-nil for a
1314 display or frame whenever a mouse is supported on that display or
1318 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1321 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1322 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1325 ** New hook `pre-redisplay-function'.
1328 ** New bool-vector set operation functions
1329 *** `bool-vector-exclusive-or'
1330 *** `bool-vector-union'
1331 *** `bool-vector-intersection'
1332 *** `bool-vector-set-difference'
1333 *** `bool-vector-not'
1334 *** `bool-vector-subsetp'
1335 *** `bool-vector-count-consecutive'
1336 *** `bool-vector-count-population'
1339 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1341 ** Error-handling changes
1344 *** New function `define-error'.
1347 *** `with-demoted-errors' takes an additional argument `format'.
1350 ** New macro `with-eval-after-load'.
1351 This is like the old `eval-after-load', but better behaved.
1354 ** New library subr-x.el with miscellaneous small utility functions
1355 *** `hash-table-keys'
1356 *** `hash-table-values'
1357 *** `string-blank-p'
1358 *** `string-empty-p'
1360 *** `string-reverse'
1361 *** `string-trim-left'
1362 *** `string-trim-right'
1364 *** `string-remove-prefix'
1365 *** `string-remove-suffix'
1368 ** Obsoleted functions
1371 *** `lisp-complete-symbol'
1372 *** `field-complete'
1373 *** `minibuffer-completion-contents'
1374 *** `isearch-nonincremental-exit-minibuffer'
1375 *** `isearch-filter-visible'
1376 *** `generic-make-keywords-list'
1377 *** `get-upcase-table' (use `case-table-get-table' instead).
1380 ** `with-wrapper-hook' is obsoleted by `add-function'.
1381 The few hooks that used with-wrapper-hook are replaced as follows:
1382 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1383 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1384 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1387 ** `byte-compile-interactive-only-functions' is now obsolete.
1388 To specify that a command should only be called interactively, give it
1389 a non-nil `interactive-only' property.
1392 ** `split-string' now takes an optional argument TRIM.
1393 The value, if non-nil, is a regexp that specifies what to trim from
1394 the start and end of each substring.
1397 ** New function `string-suffix-p'.
1399 ** File-handling changes
1402 *** Support for filesystem notifications.
1403 Emacs now supports notifications of filesystem changes, such as
1404 creation, modification, and deletion of files. This requires the
1405 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1406 MS-Windows systems, this is supported for Windows XP and newer
1410 *** The 9th element returned by `file-attributes' is now unspecified.
1411 Formerly, it was t if the file's gid would change if file were deleted
1412 and recreated. This value has been inaccurate for years on many
1413 platforms, and nobody seems to have noticed or cared.
1416 *** The 6th argument to `copy-file' has been renamed to
1417 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1418 Unix file permission bits as well as SELinux context.
1421 *** The function `file-ownership-preserved-p' now has an optional
1422 argument GROUP which causes it check for file group too. This can be
1423 used in place of the 9th element of `file-attributes'.
1426 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1427 argument, with the same interpretation as the returned value of
1428 `visited-file-modtime'.
1430 ** Autorevert changes
1433 *** If Emacs is compiled with file notification support, notifications
1434 are used instead of checking the time stamp of the files. You can
1435 disable this by setting the user option `auto-revert-use-notify' to
1436 nil. Alternatively, a regular expression of directories to be
1437 excluded from file notifications can be specified by
1438 `auto-revert-notify-exclude-dir-regexp'.
1441 *** The new user option `auto-revert-remote-files' enables reversion
1442 of remote files when set to non-nil.
1447 *** The function `face-spec-set' is now like `setq' for face specs.
1448 Its third arg now accepts values specifying a face spec type (defface,
1449 custom, or override spec), and the relevant spec is set accordingly.
1452 *** New function `add-face-text-property', which can be used to
1453 conveniently prepend/append new face properties.
1456 *** Face specs set via Custom themes now replace the `defface' spec
1457 rather than inheriting from it. In other words, setting a face via a
1458 theme now behaves like setting it via Customize: you only need to
1459 specify the attributes that you want, you don't need to unset those
1460 that you don't want.
1463 *** New face characteristic (supports :underline (:style wave))
1464 specifies whether or not the terminal can display a wavy line.
1467 *** New face spec attribute :distant-foreground
1468 specifies foreground to use if background color is near the foreground
1469 color that would otherwise have been used.
1474 *** `image-animated-p' is now `image-multi-frame-p'.
1475 It returns non-nil for any image that contains multiple frames,
1476 whether or not it specifies a frame delay.
1479 *** New variable `image-default-frame-delay' gives the frame delay for
1480 animated images which do not specify a frame delay.
1483 *** New functions `image-current-frame' and `image-show-frame' for getting
1484 and setting the current frame of a multi-frame image.
1489 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1490 **** object-name -> eieio-object-name
1491 **** object-class -> eieio-object-class
1492 **** object-class-fast -> eieio--object-class
1493 **** object-class-name -> eieio-object-class-name
1494 **** object-name-string -> eieio-object-name-string
1495 **** object-num-slots -> eieio--object-num-slots
1496 **** object-set-name-string -> eieio-object-set-name-string
1497 **** class-of -> eieio-object-class
1498 **** class-name -> eieio-class-name
1499 **** class-parent -> eieio-class-parent
1500 **** class-parents -> eieio-class-parents
1501 **** class-parents-fast -> eieio-class-parents-fast
1502 **** class-children -> eieio-class-children
1503 **** class-num-slots -> eieio--class-num-slots
1504 **** class-precedence-list -> eieio-class-precedence-list
1505 **** class-direct-subclasses -> eieio-class-children
1506 **** class-direct-superclasses -> eieio-class-parents
1508 ** Changes in encoding and decoding of text
1511 *** New coding-system `prefer-utf-8'.
1512 This is like `undecided' but prefers UTF-8 on decoding if the text to
1513 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1514 any non-ASCII characters are automatically encoded as UTF-8.
1517 *** New attributes of coding-systems whose type is `undecided'.
1518 Two new attributes, `:inhibit-null-byte-detection' and
1519 `:inhibit-iso-escape-detection', determine how to detect encoding of
1520 text that includes null bytes and ISO-2022 escape sequences,
1521 respectively. Each of these attributes can be either nil, zero, or
1522 t. If it is t, decoding text ignores null bytes and, respectively,
1523 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1524 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1525 text is encoded in one of the ISO-2022 encodings, such as
1526 iso-2022-7bit. If the value is zero, Emacs consults the variables
1527 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1529 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1530 UTF-8 encoding and decoding, whenever possible.
1532 These attributes are only meaningful for coding-systems of type
1533 `undecided'. (The type of a coding-system is determined by its
1534 `:coding-type' attribute and can be accessed by calling the
1535 `coding-system-type' function.)
1538 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1541 ** New functions `group-gid' and `group-real-gid'.
1544 ** The spelling of the rx.el category `chinese-two-byte' has been
1545 corrected (the first 'e' was missing).
1548 ** Minor internal changes to the details of lock files.
1549 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1550 If DIR/.#FILE already exists and is not an Emacs lock file,
1551 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1552 numbered lock files DIR/.#FILE.0...).
1553 On file systems that do not support symbolic links, the lock is now a
1554 regular file with contents being what would have been in the symlink.
1556 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1559 *** The package descriptor and name of global variables, constants,
1560 and functions should be separated by two hyphens if the symbol is not
1561 meant to be used by other packages.
1564 * Changes in Emacs 24.4 on Non-Free Operating Systems
1567 ** The procedure for building Emacs on MS-Windows has changed.
1568 It is now built by running the same configure script as on all other
1569 platforms. This requires the MSYS environment and MinGW development
1570 tools. See the updated instructions in nt/INSTALL for details.
1572 Using the Posix configure script and Makefile's also means a change in
1573 the directory structure of the Emacs installation on Windows. It is
1574 now the same as on GNU and Unix systems. In particular, the auxiliary
1575 programs, such as cmdproxy.exe and hexl.exe, are in
1576 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1577 version), version-independent site-lisp is in share/emacs/site-lisp,
1578 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1579 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1580 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1581 directories and will find the files in there automatically; there's no
1582 need to set any variables due to this change.)
1585 ** Emacs on Windows 2000 and later can now access files and directories
1586 whose names cannot be encoded in the current system codepage.
1588 The new variable `w32-unicode-filenames' controls this feature: if it
1589 is t, Emacs uses Unicode APIs to pass file names to system calls,
1590 which lifts the limitation of file names to the current locale.
1593 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1594 The backtrace is written to the 'emacs_backtrace.txt' file in the
1595 directory where Emacs was running.
1598 ** The variable `buffer-file-type' is no longer supported.
1599 Setting it has no effect, and %t in the mode-line format is ignored.
1600 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1601 modifying it has no effect.
1604 ** Lock files now work on MS-Windows.
1605 This helps to prevent losing your edits if the same file is being
1606 edited in another Emacs session or by another user. See the node
1607 "Interlocking" in the Emacs User Manual for the details. To disable
1608 file locking, customize `create-lockfiles' to nil.
1610 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1611 GNUstep and Mac OS X 10.4 use the old font backend.
1612 To use the old backend by default, do on the command line:
1613 % defaults write org.gnu.Emacs FontBackend ns
1615 ** Improved fullscreen support on Mac OS X.
1616 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1617 Customize `ns-use-native-fullscreen' to change the style.
1618 For Mac OS X 10.7 and newer, native is the default.
1620 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1621 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1622 does not apply to images.
1625 * Installation Changes in Emacs 24.3
1627 ** The default X toolkit is now Gtk+ version 3.
1628 If you don't pass `--with-x-toolkit' to configure, or if you use
1629 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1630 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1631 You can explicitly require a specific version by passing
1632 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1634 ** New configure option `--enable-link-time-optimization', to utilize
1635 an appropriate feature provided by GCC since version 4.5.0.
1637 ** New configure option `--without-all' to disable most of the optional
1638 features (image support, etc.) that are normally enabled by default.
1640 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1641 Emacs). If building with GCC, this enables compile-time checks that
1642 warn/give errors about possibly-questionable C code. On a recent GNU
1643 system there should be no warnings; on older and on non-GNU systems
1644 the results may be useful to developers.
1646 ** The configure option `--enable-use-lisp-union-type' has been
1647 renamed to `--enable-check-lisp-object-type', as the resulting
1648 Lisp_Object type no longer uses a union to implement the compile time
1649 check that this option enables.
1651 ** The configure option `--disable-maintainer-mode' has been removed,
1652 as it was confusingly-named and rarely useful.
1654 ** The configure options `--program-prefix', `--program-suffix', and
1655 `--program-transform-name' apply to more than just the installed
1656 binaries. Now they also affect the man pages, icons, and the
1657 etc/emacs.desktop file; but not the info pages, since this would break
1658 links between the various manuals.
1660 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1661 overwriting "emacs" in the installation bin/ directory with a link
1664 ** Emacs uses libtinfo in preference to libncurses, if available.
1666 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1667 /usr/pkg/lib to the linker search path. You must add them yourself if
1670 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1671 (from the bin and libexec directories, respectively). The former is
1672 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1675 * Startup Changes in Emacs 24.3
1677 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1678 lisp/ directory. There should not be any there anyway. If you have
1679 been adding them there, put them somewhere else; e.g., site-lisp.
1681 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1684 * Changes in Emacs 24.3
1688 *** `C-h f' (`describe-function') can now perform autoloading.
1689 When this command is called for an autoloaded function whose docstring
1690 contains a key substitution construct, that function's library is
1691 automatically loaded, so that the documentation can be shown
1692 correctly. To disable this, set `help-enable-auto-load' to nil.
1694 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1695 even after their associated libraries have been loaded (and the
1696 autoloads have been redefined as functions).
1700 *** Images displayed via ImageMagick now support transparency and the
1701 :background image specification property.
1703 *** When available, ImageMagick support is automatically enabled.
1704 It is no longer necessary to call `imagemagick-register-types'
1705 explicitly to install ImageMagick image types; that function is called
1706 automatically at startup, or when customizing an imagemagick- option.
1708 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1709 ImageMagick to view images. (You must call `imagemagick-register-types'
1710 afterwards if you do not use customize to change this.)
1712 *** The new variable `imagemagick-enabled-types' also affects which
1713 ImageMagick types are treated as images. The function
1714 `imagemagick-filter-types' returns the list of types that will be
1719 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1720 next and previous path separator, respectively.
1722 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1723 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1724 non-nil before enabling the mode.
1728 *** New option `mode-line-default-help-echo' specifies the help text
1729 (shown in a tooltip or in the echo area) for any part of the mode line
1730 that does not have its own specialized help text.
1732 *** You can now click mouse-3 in the coding system indicator to invoke
1733 `set-buffer-file-coding-system'.
1735 ** Server and client
1737 *** emacsclient now obeys string values for `initial-buffer-choice',
1738 if it is told to open a new frame without specifying any file to visit
1739 or expression to evaluate.
1741 *** New option `server-auth-key' specifies a shared server key.
1743 ** Emacs now generates backtraces on fatal errors.
1744 On encountering a fatal error, Emacs now outputs a textual description
1745 of the fatal signal, and a short backtrace on platforms like glibc
1746 that support backtraces.
1748 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1749 This minor mode replaces `toggle-read-only', which is now obsolete.
1751 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1752 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1753 respectively, without exiting from the prompt.
1755 ** In the Package Menu, newly-available packages are listed as "new",
1756 and sorted above the other "available" packages by default.
1758 ** If your Emacs was built from a repository checkout, the new variable
1759 `emacs-bzr-version' contains information about the bzr revision used.
1761 ** New option `create-lockfiles' specifies usage of lockfiles.
1762 It defaults to t. Changing it to nil inhibits the creation of lock
1763 files (use this with caution).
1765 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1766 variables on remote hosts.
1768 ** The entry for PCL-CVS has been removed from the Tools menu.
1769 The PCL-CVS commands are still available via the keyboard.
1771 ** Using "unibyte: t" in Lisp source files is obsolete.
1772 Use "coding: raw-text" instead.
1774 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1775 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1776 The previous binding, introduced in Emacs 24.1, was a mistake, because
1777 `C-c LETTER' bindings are reserved for user customizations.
1779 ** Internationalization
1781 *** New language environment: Persian.
1783 *** New input method `vietnamese-vni'.
1785 ** Nextstep (GNUstep / Mac OS X) port
1787 *** Support for fullscreen and the frame parameter fullscreen.
1789 *** A file dialog is used for open/save operations initiated from the
1793 * Editing Changes in Emacs 24.3
1795 ** Search and Replace
1797 *** Non-regexp Isearch now performs "lax" space matching.
1798 Each sequence of spaces in the supplied search string may match any
1799 sequence of one or more whitespace characters, as specified by the
1800 variable `search-whitespace-regexp'. (This variable is also used by a
1801 similar existing feature for regexp Isearch.)
1803 *** New Isearch command `M-s SPC' toggles lax space matching.
1804 This applies to both ordinary and regexp Isearch.
1806 *** New option `replace-lax-whitespace'.
1807 If non-nil, `query-replace' uses flexible whitespace matching too.
1810 *** Global `M-s _' starts a symbol (identifier) incremental search,
1811 and `M-s _' in Isearch toggles symbol search mode.
1812 `M-s c' in Isearch toggles search case-sensitivity.
1814 ** Navigation commands
1816 *** New binding `M-g c' for `goto-char'.
1818 *** New binding `M-g TAB' for `move-to-column'.
1820 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1821 interactively with no prefix arg. Previously, it moved to column 1.
1823 ** New option `yank-handled-properties' allows processing of text
1824 properties on yanked text, in ways that are more general than just
1825 removing them (as is done by `yank-excluded-properties').
1827 ** New option `delete-trailing-lines' specifies whether
1828 M-x delete-trailing-whitespace should delete trailing lines at the end
1829 of the buffer. It defaults to t.
1831 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1833 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1834 `ucs-insert' is now an obsolete alias for `insert-char'.
1836 ** The `z' key no longer has a binding in most special modes.
1837 It used to be bound to `kill-this-buffer', but `z' is too easy to
1840 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1841 It copies the region-rectangle as the last rectangle kill.
1845 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1847 *** New option `register-separator' specifies the register containing
1848 the text to put between collected texts for use with
1849 M-x append-to-register and M-x prepend-to-register.
1852 * Changes in Specialized Modes and Packages in Emacs 24.3
1854 ** Common Lisp emulation (CL)
1856 *** CL's main entry is now (require 'cl-lib).
1857 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1858 i.e., all its definitions have the "cl-" prefix (and internal definitions
1859 use the "cl--" prefix).
1861 If `cl' provided a feature under the name `foo', then `cl-lib'
1862 provides it under the name `cl-foo' instead; with the exceptions of the
1863 few `cl' definitions that had to use `foo*' to avoid conflicts with
1864 pre-existing Elisp entities. These have been renamed to `cl-foo'
1865 rather than `cl-foo*'.
1867 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1868 provide the old, non-prefixed names. Some exceptions are listed below:
1870 *** `cl-flet' is not like `flet' (which is deprecated).
1871 Instead it obeys the behavior of Common-Lisp's `flet'.
1872 In particular, in cl-flet function definitions are lexically scoped,
1873 whereas in flet the scoping is dynamic.
1875 *** `cl-labels' is slightly different from `labels'.
1876 The difference is that it relies on the `lexical-binding' machinery
1877 (as opposed to the `lexical-let' machinery used previously) to capture
1878 definitions in closures, so such closures will only work if `lexical-binding'
1881 *** `cl-letf' is not exactly like `letf'.
1882 The only difference is in details that relate to some deprecated usage
1883 of `symbol-function' in place forms.
1885 *** `progv' was rewritten to use the `let' machinery.
1886 A side effect is that variables without corresponding values are bound
1887 to nil rather than being made unbound.
1889 *** The following methods of extending `setf' are obsolete
1890 (use features from gv.el instead):
1891 `define-modify-macro' (use `gv-letplace')
1892 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1893 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1894 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1898 *** Changes are now highlighted using the same color scheme as in
1899 modern VCSes. Deletions are displayed in red (new faces
1900 `diff-refine-removed' and `smerge-refined-removed', and new definition
1901 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1902 and `smerge-refined-added', and new definition of `diff-added').
1904 *** The variable `diff-use-changed-face' defines whether to use the
1905 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1906 changes in context diffs.
1908 *** The new command `diff-delete-trailing-whitespace' removes trailing
1909 whitespace introduced by a diff.
1911 ** Ediff now uses the same color scheme as Diff mode.
1915 A new version of python.el, which provides several new features, including:
1916 per-buffer shells, better indentation, Python 3 support, and improved
1917 shell-interaction compatible with iPython (and virtually any other
1920 *** Some user options have been replaced/renamed, including (old -> new):
1921 **** python-indent -> python-indent-offset
1922 **** python-guess-indent -> python-indent-guess-indent-offset
1923 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1924 **** python-use-skeletons -> python-skeleton-autoinsert
1926 *** Some user options have been removed, including:
1928 **** `python-indent-string-contents': Strings are never indented.
1930 **** `python-honour-comment-indentation':
1931 Comments are always considered as indentation markers.
1933 **** `python-continuation-offset': Indentation is automatically
1934 calculated in a pep8 compliant way depending on the context.
1936 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1937 Have no direct mapping as the shell interaction is completely different.
1939 **** `python-python-command', `python-jython-command':
1940 Replaced by `python-shell-interpreter'.
1942 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1943 `python-pdbtrack-minor-mode-string', `python-source-modes':
1946 *** Some commands have been replaced (old -> new):
1947 **** python-insert-class -> python-skeleton-class
1948 **** python-insert-def -> python-skeleton-def
1949 **** python-insert-for -> python-skeleton-for
1950 **** python-insert-if -> python-skeleton-if
1951 **** python-insert-try/except -> python-skeleton-try
1952 **** python-insert-try/finally -> python-skeleton-try
1953 **** python-insert-while -> python-skeleton-while
1954 **** python-find-function -> python-nav-jump-to-defun
1955 **** python-next-statement -> python-nav-forward-sentence
1956 **** python-previous-statement -> python-nav-backward-sentence
1957 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1958 **** python-end-of-defun-function -> python-nav-end-of-defun
1959 **** python-send-buffer -> python-shell-send-buffer
1960 **** python-send-defun -> python-shell-send-defun
1961 **** python-send-region -> python-shell-send-region
1962 **** python-send-region-and-go -> emulate with python-shell-send-region
1963 and python-shell-switch-to-shell
1964 **** python-send-string -> python-shell-send-string
1965 **** python-switch-to-python -> python-shell-switch-to-shell
1966 **** python-describe-symbol -> python-eldoc-at-point
1970 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1972 *** The D-Bus object manager interface is implemented.
1974 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1975 if their value does not fit into Emacs's integer range.
1977 *** The function `dbus-call-method' is now non-blocking.
1978 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1980 *** Signals can also be sent as unicast messages.
1982 *** The argument list of `dbus-register-signal' has been extended,
1983 according to the new match rule types of D-Bus.
1985 *** `dbus-init-bus' supports private connections.
1987 *** There is a new function `dbus-setenv'.
1989 ** `desktop-path' no longer includes the "." directory.
1990 Desktop files are now located in ~/.emacs.d by default.
1994 *** `dired-do-async-shell-command' executes each file sequentially
1995 if the command ends in `;' (when operating on multiple files).
1996 Otherwise, it executes the command on each file in parallel.
1998 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1999 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
2002 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
2003 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
2004 mark/unmark/flag all files in the active region.
2006 *** The minibuffer default for `=' (`dired-diff') has changed.
2007 It is now the backup file for the file at point, if one exists.
2008 In Transient Mark mode the default is the file at the active mark.
2010 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2011 The global binding for `M-=', `count-words-region' is in effect.
2015 *** New module "notifications", which can send a notification when you
2016 receive a private message or your nickname is mentioned.
2018 *** ERC will look up server/channel names via auth-source and use any
2021 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2022 only applies to messages sent by lurkers.
2024 ** reStructuredText mode
2026 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2027 fontification, comment handling, and customization have all been revised
2030 *** Support for `imenu' and `which-function-mode'.
2032 *** The reStructuredText syntax is more closely covered.
2033 Sphinx support has been improved.
2035 *** `rst-insert-list' inserts new list or continues existing lists.
2037 *** A negative prefix argument always works for `rst-adjust'.
2039 *** The window configuration is reset after displaying a TOC.
2041 *** The constant `rst-version' describes the rst.el package version.
2045 *** Support for percent literals and recognition of regular expressions
2046 in method calls without parentheses with more methods, including Cucumber
2049 *** Improved syntax highlighting and indentation.
2051 *** New command `ruby-toggle-block', bound to `C-c {'.
2053 *** Some non-standard keybindings/commands have been removed:
2055 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
2057 **** `ruby-mark-defun'; use `mark-defun'.
2059 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2060 appropriate settings for the variables `beginning-of-defun-function'
2061 and `end-of-defun-function'.
2063 **** Non-standard keybindings for `backward-kill-word', `comment-region',
2064 `reindent-then-newline-and-indent' and `newline' have been removed.
2066 ** Shell Script mode
2068 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2070 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2072 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2076 *** The free software compiler GHDL is supported (and now the default).
2078 *** Support for the VHDL-AMS packages has been added/updated.
2080 *** Updated to the 2002 revision of the VHDL standard.
2082 *** Accepts \r and \f as whitespace.
2086 *** The faces used by Apropos are now directly customizable.
2087 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2088 see the `apropos' Custom group for details.
2090 *** The old options whose values specified faces to use have been removed
2091 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2092 `apropos-match-face' and `apropos-property-face'.).
2096 *** This package has been rewritten to use Tabulated List mode.
2098 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2099 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2103 *** Algebraic simplification mode is now the default.
2104 To restrict to the limited simplifications given by the former
2105 default simplification mode, use `m I'.
2109 *** You can customize the header text that appears above each calendar month.
2110 See the variable `calendar-month-header'.
2112 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2114 *** The calendars produced by cal-html include holidays.
2115 Customize `cal-html-holidays' to change this.
2119 *** The major modes from the parser generators "Bovine" and "Wisent"
2120 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2121 are in `auto-mode-alist', and the corresponding manuals are included.
2125 **** Menu support for the "Configuration" feature. This allows users to
2126 choose the active configuration (such as debug or install) from the menu.
2128 **** New command `ede-set' to interactively set project-local variables.
2130 **** Support for compiling, debugging, and running in "generic" projects.
2132 **** Autoconf editing support for M4 macros with complex arguments.
2134 **** Compilation support for the "linux" project type.
2136 **** "simple" projects have been removed; use "generic" projects instead.
2140 **** Support for parsing #include statements inside a namespace in C/C++.
2142 **** Improved support for 'extern "C"' declarations in C/C++.
2144 **** The ability to ignore more common special C/C++ preprocessor symbols,
2145 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2146 If available, include cdefs.h as an additional source of preprocessor symbols.
2148 **** Improved C/C++ function pointer parsing.
2150 **** In Python, support for converting imports to include file names.
2152 **** Ability to dynamically determine the Python load path.
2154 **** Support for the Python 'WITH' and 'AT' keywords.
2156 **** Improved tooltip completion.
2160 **** The SRecode manual is now included.
2162 **** Tag generation supports constructor/destructor settings and system
2163 include differentiation.
2165 **** Addition of 'Framework' support: Frameworks are specified when a
2166 particular kind of library (such as Android) is needed in a common language
2169 **** Support for nested templates and let variables override based on priority.
2171 **** Support for merging tables from multiple related modes, such as
2172 default -> c++ -> arduino.
2174 ** Compile has a new option `compilation-always-kill'.
2178 *** `custom-reset-button-menu' now defaults to t.
2180 *** Non-option variables are never matched in `customize-apropos' and
2181 `customize-apropos-options' (i.e., the prefix argument does nothing for
2182 these commands now).
2186 *** The variables `term-default-fg-color' and `term-default-bg-color'
2187 are now deprecated in favor of the customizable face `term'.
2189 *** You can customize how to display ANSI terminal colors and styles
2190 by customizing the corresponding `term-color-<COLOR>',
2191 `term-color-underline' and `term-color-bold' faces.
2195 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2197 *** Remote processes are now also supported on remote MS-Windows hosts.
2201 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2202 Previously, this slot stored semicolon-separated attribute-value pairs
2203 appended to some imap URLs, but this is not compatible with RFC 3986.
2204 So now the `filename' slot stores the entire path and query components,
2205 and the `attributes' slot is always nil.
2207 *** New function `url-encode-url' for encoding a URI string.
2208 The `url-retrieve' function now uses this to encode its URL argument,
2209 in case that is not properly encoded.
2211 ** notifications.el supports now version 1.2 of the Notifications API.
2212 The function `notifications-get-capabilities' returns the supported
2215 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2216 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2217 `flymake-warning-bitmap'.
2219 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2220 specifying URL types that should be converted to remote file names at
2221 the FFAP prompt. The default is now '("ftp").
2223 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2224 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2226 ** New option `mouse-avoidance-banish-position' specifies where the
2227 `banish' mouse avoidance setting moves the mouse.
2229 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2230 closing brackets to be aligned with the line of the opening bracket.
2232 ** In Proced mode, new command `proced-renice' renices marked processes.
2234 ** New option `async-shell-command-buffer' specifies the buffer to use
2235 for a new asynchronous `shell-command' when the default output buffer
2236 `*Async Shell Command*' is already in use.
2238 ** SQL mode has a new option `sql-db2-escape-newlines'.
2239 If non-nil, newlines sent to the command interpreter will be escaped
2240 by a backslash. The default does not escape the newlines and assumes
2241 that the sql statement will be terminated by a semicolon.
2243 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2244 (and modes that derive from it), sorts the column at point, or the Nth
2245 column if a numeric prefix argument is given.
2247 ** `which-func-modes' now defaults to t, so Which Function mode, when
2248 enabled, applies to all applicable major modes.
2250 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2253 ** Follow mode no longer works by using advice.
2254 The option `follow-intercept-processes' has been removed.
2256 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2258 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2259 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2260 *** semantic-change-hooks -> semantic-change-functions
2261 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2262 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2263 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2264 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2265 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2266 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2267 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2268 *** rcirc-activity-hooks -> rcirc-activity-functions
2269 *** rcirc-print-hooks -> rcirc-print-functions
2270 *** dbus-event-error-hooks -> dbus-event-error-functions
2271 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2272 *** checkdoc-style-hooks -> checkdoc-style-functions
2273 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2274 *** archive-extract-hooks -> archive-extract-hook
2275 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2276 *** hfy-post-html-hooks -> hfy-post-html-hook
2277 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2278 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2279 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2280 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2282 ** Obsolete packages
2285 In most cases, assoc+member+push+delq work just as well.
2286 And in any case it's just a terrible package: ugly semantics, terrible
2287 inefficiency, and not namespace-clean.
2296 * Incompatible Lisp Changes in Emacs 24.3
2298 ** Docstrings starting with `*' no longer indicate user options.
2299 Only variables defined using `defcustom' are considered user options.
2300 The function `user-variable-p' is now an obsolete alias for
2301 `custom-variable-p'.
2303 ** The return values of `defalias', `defun' and `defmacro' have changed,
2304 and are now undefined. For backwards compatibility, `defun' and
2305 `defmacro' currently return the name of the newly defined
2306 function/macro, but this should not be relied upon.
2308 ** `random' by default now returns a different random sequence in
2309 every Emacs run. Use `(random S)', where S is a string, to set the
2310 random seed to a value based on S, in order to get a repeatable
2311 sequence in later calls.
2313 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2314 that substring is inserted literally even if the LITERAL arg is
2315 non-nil, instead of causing an error to be signaled.
2317 ** `select-window' now always makes the window's buffer current.
2318 It does so even if the window was selected before.
2320 ** The function `x-select-font' can return a font spec, instead of a
2321 font name as a string. Whether it returns a font spec or a font name
2322 depends on the graphical library.
2324 ** `face-spec-set' no longer sets frame-specific attributes when the
2325 third argument is a frame (that usage was obsolete since Emacs 22.2).
2327 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2329 ** The CL package's `get-setf-method' function no longer exists.
2330 Generalized variables are now part of core Emacs Lisp, and implemented
2331 differently to the way cl.el used to do it. It is not possible to
2332 define a compatible replacement for `get-setf-method'. See the file
2333 gv.el for internal details of the new implementation.
2335 ** The arguments of `dbus-register-signal' are no longer just strings,
2336 but keywords or keyword-string pairs. The old argument list will
2337 still be supported for Emacs 24.x.
2339 ** Miscellaneous name changes
2340 Some Lisp symbols have been renamed to correct their spelling,
2341 or to be more consistent with standard Emacs terminology.
2343 *** Renamed functions
2344 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2345 **** inactivate-input-method -> deactivate-input-method
2346 **** quail-inactivate -> quail-deactivate
2347 **** robin-inactivate -> robin-deactivate
2348 **** viper-inactivate-input-method -> viper-deactivate-input-method
2349 **** viper-inactivate-input-method-action ->
2350 viper-deactivate-input-method-action
2351 **** ucs-input-inactivate -> ucs-input-deactivate
2354 The old hooks are still supported for backward compatibility, but they
2355 are deprecated and will be removed eventually.
2356 **** input-method-inactivate-hook -> input-method-deactivate-hook
2357 **** robin-inactivate-hook -> robin-deactivate-hook
2358 **** quail-inactivate-hook -> quail-deactivate-hook
2360 *** Renamed variables
2361 **** follow-deactive-menu -> follow-inactive-menu
2362 **** inactivate-current-input-method-function ->
2363 deactivate-current-input-method-function
2365 ** Some obsolete functions, variables, and faces have been removed:
2366 *** `last-input-char', `last-command-char', `unread-command-char'
2367 *** `facemenu-unlisted-faces'
2368 *** `rmail-decode-mime-charset'
2369 *** `iswitchb-read-buffer'
2370 *** `sc-version', `sc-submit-bug-report'
2371 *** `set-char-table-default'
2372 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2373 *** `compile-internal'
2375 *** `mode-line-inverse-video'
2376 *** `follow-mode-off-hook'
2377 *** `cvs-commit-buffer-require-final-newline'
2378 (use `log-edit-require-final-newline' instead)
2379 *** `cvs-changelog-full-paragraphs'
2380 (use `log-edit-changelog-full-paragraphs' instead)
2381 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2382 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2383 *** `vc-master-templates' (use `vc-handled-backends' instead)
2384 *** `vc-checkout-carefully'
2387 * Lisp Changes in Emacs 24.3
2389 ** CL-style generalized variables are now in core Elisp.
2390 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2391 You can define your own generalized variables using `gv-define-simple-setter',
2392 `gv-define-setter', etc.
2394 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2395 This can significantly speed up execution of non-byte-compiled code,
2396 but can also bump into previously unnoticed cyclic dependencies.
2397 These are generally harmless: they will simply cause the macro calls
2398 to be left for later expansion (as before), but will result in a
2399 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2400 You may wish to restructure your code so this does not happen.
2402 ** New sampling-based Elisp profiler.
2403 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2404 When finished, use M-x profiler-stop. The sampling rate can be based on
2405 CPU time or memory allocations.
2407 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2408 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2410 ** New macros `setq-local' and `defvar-local'.
2412 ** Face underlining can now use a wave.
2414 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2415 of `read-regexp' accepts a string ending with a colon and space, and its
2416 second argument DEFAULTS can be a list of strings accessible via `M-n'
2417 in the minibuffer ahead of other hard-coded useful regexp-related values.
2418 More commands use `read-regexp' now to read their regexp arguments.
2422 *** New function `completion-table-with-quoting' to handle completion
2423 in the presence of quoting, such as file completion in shell buffers.
2425 *** New function `completion-table-subvert' to use an existing completion
2426 table, but with a different prefix.
2430 *** New error type and new function `user-error'.
2431 These do not trigger the debugger.
2433 *** New option `debugger-bury-or-kill', saying what to do with the
2434 debugger buffer when exiting debug.
2436 *** Set `debug-on-message' to enter the debugger when a certain
2437 message is displayed in the echo area. This can be useful when trying
2438 to work out which code is doing something.
2440 *** New var `inhibit-debugger', automatically set to prevent accidental
2441 recursive invocations.
2445 *** New command `fit-frame-to-buffer' adjusts the frame height to
2448 *** The command `fit-window-to-buffer' can adjust the frame height
2449 if the new option `fit-frame-to-buffer' is non-nil.
2451 *** New macro `with-temp-buffer-window', similar to
2452 `with-output-to-temp-buffer'.
2454 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2457 *** New option `switch-to-buffer-preserve-window-point' to restore a
2458 window's point when switching buffers.
2460 *** New display action alist entries `window-height' and `window-width'
2461 specify the size of new windows created by `display-buffer'.
2463 *** New display action alist entry `pop-up-frame-parameters', if
2464 non-nil, specifies frame parameters to give any newly-created frame.
2466 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2467 tells display action functions to avoid changing which frame is
2470 *** New display action alist entry `previous-window', if non-nil,
2471 specifies window to reuse in `display-buffer-in-previous-window'.
2473 *** New display action functions `display-buffer-below-selected',
2474 and `display-buffer-in-previous-window'.
2476 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2477 now accept a third argument to avoid choosing the selected window.
2479 *** Additional values recognized for option `window-combination-limit'.
2481 *** The following variables are obsolete, as they can be replaced by
2482 appropriate entries in the `display-buffer-alist' function introduced
2484 **** `dired-shrink-to-fit'
2485 **** `display-buffer-reuse-frames'
2486 **** `display-buffer-function'
2487 **** `special-display-buffer-names'
2488 **** `special-display-frame-alist'
2489 **** `special-display-function'
2490 **** `special-display-regexps'
2494 *** `current-time-string' no longer requires that its argument's year
2495 must be in the range 1000..9999. It now works with any year supported
2496 by the underlying C implementation.
2498 *** `current-time' now returns extended-format time stamps
2499 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2500 PSEC is typically a multiple of 1000 on current machines. Other
2501 functions that use this format, such as `file-attributes' and
2502 `format-time-string', have been changed accordingly. Old-format time
2503 stamps are still accepted.
2505 *** The format of timers in `timer-list' and `timer-idle-list' is now
2506 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2507 The PSECS slot is new, and uses picosecond resolution. It can be
2508 accessed via the new `timer--psecs' accessor.
2510 *** Last-modified time stamps in undo lists now are of the form
2511 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2515 *** Improved security when handling persistent objects:
2517 **** `eieio-persistent-read' now features optional arguments for specifying
2518 the class to load, as well as a flag stating whether subclasses are allowed;
2519 if provided, other classes will be rejected by the reader. For
2520 compatibility with existing code, if the class is omitted only a
2523 **** New specialized reader for pulling in classes and signaling errors
2524 without evaluation of suspicious code.
2526 **** All slots that contain objects must have a :type. Slots with lists
2527 of objects must use a new type predicate for a list of an object type.
2529 *** Support for `find-function' and similar utilities, through the addition
2530 of filename support to generated symbols.
2532 ** Floating point functions now always return special values like NaN,
2533 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2534 Previously, they returned NaNs on some platforms but signaled errors
2535 on others. The affected functions are acos, asin, tan, exp, expt,
2536 log, log10, sqrt, and mod.
2538 ** New fringe bitmap `exclamation-mark'.
2540 ** Miscellaneous changes to special forms and macros
2542 *** `defun' and `defmacro' are now macros rather than special forms.
2544 *** `kbd' is now a function rather than a macro.
2546 ** Miscellaneous new functions
2548 *** `set-temporary-overlay-map' sets up a temporary keymap that
2549 takes precedence over most other maps for a short while (normally one key).
2551 *** `autoloadp' tests if its argument is an autoloaded object.
2553 *** `autoload-do-load' performs the autoloading operation.
2555 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2557 *** `file-name-base' returns a file name sans directory and extension.
2559 *** `function-get' fetches a function property, following aliases.
2561 *** `posnp' tests if an object is a `posn'.
2563 *** `system-users' returns the user names on the system.
2565 *** `system-groups' returns the group names on the system.
2567 *** `tty-top-frame' returns the topmost frame of a text terminal.
2569 ** The following functions and variables are obsolete:
2570 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2571 *** `buffer-has-markers-at'
2572 *** `macro-declaration-function' (use `macro-declarations-alist')
2573 *** `window-system-version' (provides no useful information)
2574 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2575 *** `query-replace-interactive'
2576 *** `font-list-limit' (has had no effect since Emacs < 23)
2579 * Changes in Emacs 24.3 on Non-Free Operating Systems
2581 ** Cygwin builds can use the native MS Windows user interface.
2582 Pass `--with-w32' to configure. The default remains the X11 interface.
2584 ** Two new functions are available in Cygwin builds:
2585 `cygwin-convert-file-name-from-windows' and
2586 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2587 code to access the Cygwin file-name mapping machinery to convert
2588 between Cygwin and Windows-native file and directory names.
2590 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2591 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2592 `mouse-autoselect-window'.
2594 ** On MS Windows Vista and later Emacs now supports symbolic links.
2596 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2597 support for libxml2, even if its presence is detected.
2599 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2601 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2602 directories to the search path. You must add them yourself if you want them.
2605 * Changes in Emacs 24.2
2607 ** This is mainly a bug-fix release.
2610 * Installation Changes in Emacs 24.1
2612 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2613 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2614 also depend on Gtk+. You can disable them with --without-rsvg and
2617 ** Emacs can be compiled with GnuTLS support.
2618 This happens by default if a suitably recent version of the library is
2619 found at build time. To prevent this, use the configure option
2620 `--without-gnutls'. See below for GnuTLS features.
2622 ** Emacs can be compiled with SELinux support.
2623 This happens by default if a suitably recent version of the library is
2624 found at build time. To prevent this, use the configure option
2625 `--without-selinux'. See below for SELinux features.
2627 ** Emacs can be compiled with ImageMagick support.
2628 This happens by default if a suitably recent version of the library is
2629 found at build time. To prevent this, use the configure option
2630 `--without-imagemagick'. See below for ImageMagick features.
2631 This feature is not available for the Nextstep or MS ports.
2633 ** Emacs can be compiled with libxml2 support.
2634 This happens by default if a suitably recent version of the library is
2635 found at build time. To prevent this, use the configure option
2636 `--without-xml2'. See below for libxml2 features.
2638 ** By default, the installed Info and man pages are compressed.
2639 You can disable this by configuring --without-compress-info.
2641 ** New configure option --with-wide-int.
2642 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2643 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2646 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2647 These provide no new functionality, they just remove the need to edit
2648 lib-src/Makefile by hand in order to use the associated features.
2650 ** New configure option --enable-use-lisp-union-type.
2651 This is only useful for Emacs developers to debug certain types of bugs.
2652 This is not a new feature; only the configure flag is new.
2654 ** The standalone programs digest-doc and sorted-doc are removed.
2655 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2657 ** The standalone program `fakemail' is removed.
2658 If you need it, feedmail.el provides a superset of the functionality.
2661 * Startup Changes in Emacs 24.1
2663 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2664 command line arguments, and the EMACS_UNIBYTE environment variable, no
2665 longer have any effect. (They were declared obsolete in Emacs 23.)
2667 ** New command line option `--no-site-lisp' removes site-lisp directories
2668 from load-path. -Q now implies this. This option does not affect the
2669 EMACSLOADPATH environment variable (and hence has no effect for
2673 * Changes in Emacs 24.1
2677 *** Many packages now use the `completion-at-point' command,
2678 rather than implementing separate completion commands.
2680 *** `completion-at-point' now handles tags and semantic completion.
2682 *** Completion in a non-minibuffer now tries to detect the end of completion
2683 and pops down the *Completions* buffer accordingly.
2685 *** New option `completion-cycle-threshold' allows completion cycling.
2687 *** New option `completion-category-overrides' for overriding the
2688 default completion style in certain circumstances.
2690 *** New completion style `substring'.
2692 *** Completion of buffer names uses `substring' completion by default.
2694 *** The option `widget-complete-field' has been removed.
2698 *** The first time you try sending mail, Emacs asks for a mail method.
2699 This is implemented by a new default for `send-mail-function', which
2700 is `sendmail-query-once'. This offers to use the smtpmail package, or
2701 to use the old defaults relying on external mail facilities
2702 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2703 `mailclient-send-it' on Windows).
2705 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2706 transfers the report to your desktop's preferred mail client, if there
2707 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2710 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2711 and Mail mode changes
2713 ** Emacs server and client changes
2715 *** New option `server-port' specifies the port for TCP Emacs servers.
2717 *** New emacsclient argument -q/--quiet suppresses some status messages.
2719 *** New emacsclient argument --frame-parameters specifies the frame
2720 parameters of any newly-created graphical frame.
2722 *** If emacsclient shuts down due to Emacs signaling an error,
2723 its exit status is 1.
2725 *** New emacsclient argument --parent-id ID.
2726 This opens a client frame in parent X window ID, via XEmbed, similar
2727 to the --parent-id argument to Emacs.
2729 ** Internationalization changes
2731 *** Emacs now supports display and editing of bidirectional text.
2732 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2733 displayed in the correct visual order as expected by users of those
2734 scripts. The display reordering is a "full bidirectionality" class
2735 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2736 with no RTL text should look exactly the same as before.
2738 **** New buffer-local variable `bidi-display-reordering'.
2739 To disable display reordering in a buffer, change this to nil.
2741 **** New buffer-local variable `bidi-paragraph-direction'.
2742 If nil (the default), Emacs determines the base direction of each
2743 paragraph from its text, as specified by the UBA. Setting the value
2744 to `right-to-left' or `left-to-right' forces a base direction on each
2747 Paragraphs with right-to-left base direction are displayed starting at
2748 the right window edge.
2750 *** Enhanced support for characters with no glyphs in available fonts,
2751 or, on text terminals, characters that cannot be encoded by the
2752 terminal coding system. The new option `glyphless-char-display-control'
2753 specifies how to display them: as a hexadecimal code in a box, a thin
2754 1-pixel space, an empty box, etc.
2756 *** New input methods for Farsi and Bulgarian
2757 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2759 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2760 (U+2010 and U+2011).
2762 *** New Hebrew translation of the Emacs Tutorial.
2763 Type `C-u C-h t' to choose it in case your language setup doesn't
2764 automatically select it.
2766 ** An Emacs Lisp package manager is now included.
2767 This is a convenient way to download and install additional packages,
2768 from a package repository at http://elpa.gnu.org.
2770 *** M-x list-packages shows a list of packages, which can be
2771 selected for installation.
2773 *** New command `describe-package', bound to `C-h P'.
2775 *** By default, all installed packages are loaded automatically when
2776 Emacs starts up. To disable this, set `package-enable-at-startup' to
2777 nil. To specify the packages to load, customize `package-load-list'.
2779 ** Custom theme changes
2781 *** New command `M-x customize-themes', which provides a convenient
2782 interface for enabling and disabling Custom themes.
2784 *** New option `custom-theme-load-path' is the load path for themes.
2785 Emacs no longer looks for Custom themes in `load-path'. The default
2786 value of `custom-theme-load-path' says to look for themes in
2787 `custom-theme-directory', followed by a subdirectory of
2788 `data-directory' named "themes/", which contains a small selection of
2789 built-in Custom themes.
2791 *** New option `custom-safe-themes' records known-safe theme files.
2792 If a theme is not in this list, Emacs queries before loading it, and
2793 offers to save the theme to `custom-safe-themes' automatically. By
2794 default, all themes included in Emacs are treated as safe.
2796 ** Improved GTK integration
2798 *** GTK scroll-bars are now placed on the right by default.
2799 The function `set-scroll-bar-mode' can change this.
2801 *** GTK tool bars can have just text, just images or images and text.
2802 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2803 the default is taken from desktop settings.
2805 *** GTK tool bars can be placed on any edge of the frame.
2806 The frame-parameter tool-bar-position controls this. It takes the
2807 values top, left, right or bottom. The Options => Show/Hide menu has
2810 *** The default colors for selected text (the `region' face) are taken
2811 from the GTK theme when Emacs is built with GTK.
2813 *** Emacs uses GTK tooltips by default if built with GTK.
2814 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2816 ** Graphical interface changes
2818 *** On graphical displays, the mode-line no longer ends in dashes.
2819 Also, the first dash (which does not indicate anything) is just
2820 displayed as a space.
2822 *** `menu-bar-select-buffer-function' lets you choose another operation
2823 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2825 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2826 built with Xft. These fonts can be set via X resources, for example:
2827 Emacs.pane.menubar.font: Courier-12
2831 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2832 or if it receives a SIGINT signal in batch mode.
2834 *** `kill-emacs-hook' is now also run in batch mode.
2835 Third-party code which adds to `kill-emacs-hook' should check if they
2836 do the right thing in batch mode.
2838 ** Scrolling changes
2840 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2841 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2842 of buffer at first key-press (instead they move to top/bottom of buffer)
2843 when `scroll-error-top-bottom' is non-nil.
2845 *** New option `scroll-error-top-bottom' (see above).
2847 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2848 scroll a line instead of full screen.
2850 *** New property `scroll-command' should be set on a command's symbol to
2851 define it as a scroll command affected by `scroll-preserve-screen-position'.
2853 *** If you customize `scroll-conservatively' to a value greater than 100,
2854 Emacs will never recenter point in the window when it scrolls due to
2855 cursor motion commands or commands that move point (e.f., `M-g M-g').
2856 Previously, you needed to use `most-positive-fixnum' as the value of
2857 `scroll-conservatively' to achieve the same effect.
2859 *** "Aggressive" scrolling now honors the scroll margins.
2860 If you customize `scroll-up-aggressively' or
2861 `scroll-down-aggressively' and move point off the window, Emacs now
2862 scrolls the window so as to avoid positioning point inside the scroll
2865 ** Basic SELinux support has been added.
2866 This requires Emacs to be linked with libselinux at build time.
2868 *** Emacs preserves the SELinux file context when backing up.
2869 Also, the function `copy-file' has an extra optional argument for
2870 preserving SELinux context, and the return value of `backup-buffer'
2871 now includes the SELinux context.
2873 *** New functions `file-selinux-context' and `set-file-selinux-context'
2874 get and set the SELinux context of a file.
2878 *** `delete-by-moving-to-trash' now only affects commands that specify
2879 trashing. This avoids inadvertently trashing temporary files.
2881 *** Calling `delete-file' or `delete-directory' with a prefix argument
2882 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2884 ** File- and directory-local variable changes
2886 *** You can stop directory local vars from applying to subdirectories.
2887 Add an element (subdirs . nil) to the alist portion of any variables
2888 settings to indicate that the section should not apply to
2891 *** Directory local variables can apply to some file-less buffers.
2892 Affected modes include dired, vc-dir, and log-edit. For example,
2893 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2894 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2895 `hack-dir-local-variables-non-file-buffer' to support this.
2897 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2898 Instead, use "eval: (minor-mode 1)".
2900 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2901 to `inhibit-local-variables-regexps'. As the name suggests, it now
2902 applies to ALL file local variables, not just -*- lines. The
2903 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2908 *** The `quit-window' command now restores the last buffer displayed
2909 in the quitted window.
2911 *** Resizing an Emacs frame now preserves proportional window sizes,
2912 modulo restrictions like window minimum sizes and fixed-size windows.
2914 *** The behavior of `display-buffer' is now customizable in detail.
2916 **** New option `display-buffer-base-action' specifies a list of
2917 user-determined display "actions" (functions and optional arguments
2918 for choosing the displaying window).
2920 This takes precedence over the default display action, which is
2921 specified by `display-buffer-fallback-action'.
2923 **** New option `display-buffer-alist' maps buffer name regexps to
2924 display actions, taking precedence over `display-buffer-base-action'.
2926 *** New option `window-combination-limit'.
2927 The new option `window-combination-limit' allows to return the space
2928 obtained for resizing or creating a window more reliably to the window
2929 from which such space was obtained.
2931 *** New option `window-combination-resize'.
2932 The new option `window-combination-resize' allows to split a window that
2933 otherwise cannot be split because it's too small by stealing space from
2934 other windows in the same combination. Subsequent resizing or deletion
2935 of the window will resize all windows in the same combination as well.
2937 *** New option `frame-auto-hide-function' lets you choose between
2938 iconifying or deleting a frame when burying a buffer in a dedicated
2939 frame, or quitting a window showing a buffer in a frame of its own.
2941 *** New commands `maximize-window' and `minimize-window'.
2942 These maximize and minimize the size of a window within its frame.
2944 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2945 These functions allow to navigate through the live buffers that have
2946 been shown in a specific window.
2948 ** Minibuffer changes
2950 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2951 This is handy for minibuffer-only frames, and is also used for the feature
2952 where mouse-1 pops up *Messages*"', which can now easily be changed.
2954 *** Minibuffers set `truncate-lines' to nil.
2955 If you want to change the value to something else, you could use
2956 for example `minibuffer-setup-hook'.
2958 ** `auto-mode-case-fold' is now enabled by default.
2960 ** `backup-by-copying-when-mismatch' now defaults to t.
2962 ** New basic faces `error', `warning', `success'.
2963 These are used to highlight text indicating failure, caution or
2964 successful operation.
2966 ** New option `list-colors-sort' defines the color sort order
2967 for `list-colors-display'.
2969 ** The variable `focus-follows-mouse' now always defaults to nil.
2972 * Editing Changes in Emacs 24.1
2976 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2977 `isearch-yank-line'.
2979 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2980 `isearch-yank-kill'.
2982 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2984 ** New commands `count-words-region' and `count-words'.
2986 *** M-= is bound to `count-words-region', not `count-lines-region'.
2987 The `count-words-region' command, when called interactively, reports
2988 the number of lines, words, and characters in the region. It is a
2989 superset of the old `count-lines-region', which is now an obsolete
2992 ** The command `just-one-space' (M-SPC), if given a negative argument,
2993 also deletes newlines around point.
2997 *** New option `delete-active-region'.
2998 If non-nil, [delete] and DEL delete the region if it is active and no
2999 prefix argument is given. If set to `kill', those commands kill
3002 *** New command `delete-forward-char', bound to [delete].
3003 This is meant for interactive use, and obeys `delete-active-region'.
3004 The command `delete-char' does not obey `delete-active-region'.
3006 *** `delete-backward-char' is now a Lisp function.
3007 Apart from obeying `delete-active-region', its behavior is unchanged.
3008 However, the byte compiler now warns if it is called from Lisp; Lisp
3009 callers should use delete-char with a negative argument instead.
3011 *** The option `mouse-region-delete-keys' has been deleted.
3013 ** Selection changes.
3015 The default handling of clipboard and primary selections has been
3016 changed to conform with modern X applications. In short, most
3017 commands for killing and yanking text now use the clipboard, while
3018 mouse commands use the primary selection.
3020 In the following, we provide a list of these changes, followed by a
3021 list of steps to get the old behavior back if you prefer that.
3023 *** `select-active-regions' now defaults to t.
3024 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3025 the kill ring. The selected text is put in the primary selection, if
3026 the system possesses a separate primary selection facility (e.g. X).
3028 **** `select-active-regions' also accepts a new value, `only'.
3029 This means to only set the primary selection for temporarily active
3030 regions (usually made by mouse-dragging or shift-selection);
3031 "ordinary" active regions, such as those made with C-SPC followed by
3032 point motion, do not alter the primary selection.
3034 **** `mouse-drag-copy-region' now defaults to nil.
3036 *** mouse-2 is now bound to `mouse-yank-primary'.
3037 This pastes from the primary selection, ignoring the kill-ring.
3038 Previously, mouse-2 was bound to `mouse-yank-at-click'.
3040 *** `x-select-enable-clipboard' now defaults to t on all platforms.
3042 *** `x-select-enable-primary' now defaults to nil.
3043 Thus, commands that kill text or copy it to the kill-ring (such as
3044 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3046 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3047 exactly equivalent to M-w, C-w, and C-y respectively.
3049 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
3050 non-nil by default, as Windows does not support the primary selection
3051 between applications.
3053 *** To return to the previous behavior, do the following:
3055 **** Change `select-active-regions' to nil.
3056 **** Change `mouse-drag-copy-region' to t.
3057 **** Change `x-select-enable-primary' to t (on X only).
3058 **** Change `x-select-enable-clipboard' to nil.
3059 **** Bind `mouse-yank-at-click' to mouse-2.
3061 *** Support for X cut buffers has been removed.
3063 *** X clipboard managers are now supported.
3064 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3066 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3067 in the current rectangle. With a prefix argument, this prompts for a
3068 number to count from and for a format string.
3070 ** `redisplay-dont-pause' now defaults to t.
3071 This makes Emacs feel more responsive to editing commands that arrive
3072 at high rate, e.g. if you lean on some key, because stopping redisplay
3073 in the middle (when this variable is nil) forces more expensive
3074 updates later on, and Emacs appears to be unable to keep up.
3076 ** The behavior of <TAB> for active regions in Text mode has changed.
3077 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3078 when the region is active causes Emacs to indent all the lines in the
3079 region, aligning them with the line previous to the first line in the
3080 region (or with the left margin if there is no previous line).
3082 ** When `occur' is called with a prefix argument, matching strings are
3083 collected into the `*Occur*' buffer without line numbers. If there
3084 are parenthesized subexpressions in the specified regexp, `occur'
3085 reads replacement text that may contain \\& and \\N whose convention
3086 follows `replace-match'.
3089 * Changes in Specialized Modes and Packages in Emacs 24.1
3091 ** Archive Mode has basic support for browsing and updating 7z archives.
3095 *** BibTeX mode now supports biblatex.
3096 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3097 `bibtex-entry-field-alist' is now an obsolete alias for
3098 `bibtex-BibTeX-entry-alist'.
3100 *** New command `bibtex-search-entries', bound to C-c C-a.
3102 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3104 *** New variable `bibtex-search-entry-globally'.
3108 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3110 *** The default browser used by the package is now the "xdg-open" program,
3111 on platforms that support it. This calls your desktop's preferred browser.
3115 *** Support for musical notes.
3117 *** Support for logarithmic units.
3119 *** No longer uses the tex prefix for TeX specific unit names when
3120 using TeX or LaTeX mode.
3122 *** New option to highlight selections using faces.
3124 *** `calc-histogram' has the option of using a vector to determine the bins.
3126 *** New "O" option prefix.
3128 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3130 ** Calendar, Diary, and Appt
3132 *** Diary entries can contain non-printing "comments".
3133 See the variable `diary-comment-start'.
3135 *** Appointments can specify their individual warning times.
3136 See the variable `appt-warning-time-regexp'.
3138 *** The function specified by `appt-disp-window-function' may be passed
3139 lists of arguments if multiple appointments are due at similar times.
3140 If you are using a custom function for this, you should update it.
3142 *** New function `diary-hebrew-birthday'.
3144 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3145 may no longer be nil, but must all be strings.
3147 *** The obsolete (since Emacs 22.1) method of enabling the appt
3148 package by adding `appt-make-list' to `diary-hook' has been removed.
3149 Use `appt-activate' instead.
3151 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3152 appt-issue-message (use the function appt-activate)
3153 appt-visible/appt-msg-window (use the variable appt-display-format)
3155 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3156 view-diary-entries, list-diary-entries, show-all-diary-entries
3160 *** New feature to "guess" the style in an existing buffer.
3161 The main entry point is M-x c-guess.
3163 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3165 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3166 Thus C-M-a will, by default, go to the beginning of the immediate function,
3169 *** "Macros with semicolons" can be registered for correct indentation.
3170 Where such a macro ends a line (no semicolon) the next statement is no longer
3171 parsed as a statement continuation.
3173 ** Comint and modes derived from it use the standard completion code.
3177 *** Compilation mode can be used without Font Lock mode.
3178 `compilation-parse-errors-function' is now obsolete.
3180 *** New variable `compilation-filter-start', which is bound while
3181 `compilation-filter-hook' runs. It records the start position of the
3182 text inserted by `compilation-filter'.
3184 *** `compilation-error-screen-columns' and `compilation-first-column'
3185 are obeyed in the editing buffer. So programming language modes can
3186 set them, whereas previously only the value in the *Compilation*
3191 *** Customize buffers now contain a search field.
3192 The search is performed using `customize-apropos'.
3193 To turn off the search field, set `custom-search-field' to nil.
3195 *** Options in customize group buffers start out hidden if not customized.
3196 Use the arrow to the left of the option name to toggle visibility.
3198 *** custom-buffer-sort-alphabetically now defaults to t.
3200 *** The color widget now has a "Choose" button, which allows you to
3201 choose a color via `list-colors-display'.
3205 *** It is now possible to access buses other than the default system
3208 *** The `dbus-register-method' and `dbus-register-property' functions
3209 optionally do not register names.
3211 *** The new function `dbus-register-service' registers a known service
3212 name on a D-Bus without also registering a property or a method.
3216 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3217 if called with a prefix argument, read a file name from the minibuffer
3218 instead of using the current buffer.
3220 *** The "dired local variables" feature of Dired-x is obsolete.
3221 The standard directory local variables feature replaces it.
3225 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3226 controlling attempts to autojoin a channel.
3228 *** New variable `erc-coding-system-precedence': If we use `undecided'
3229 as the server coding system, this variable will then be consulted.
3230 The default is to decode strings that can be decoded as utf-8 as
3231 utf-8, and do the normal `undecided' decoding for the rest.
3235 *** The default value of `eshell-directory-name' has changed
3236 to be an "eshell" directory in `user-emacs-directory'.
3237 The old "~/.eshell/" directory is still used if it exists, though.
3241 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3242 It now supports multithread non-stop debugging and simultaneous
3243 debugging of several threads.
3247 *** RET (`image-toggle-animation') toggles animation, if applicable.
3248 Animation plays once, unless the option `image-animate-loop' is non-nil.
3252 *** New command M-x info-display-manual displays a named Info manual.
3253 If that manual is already visited in some Info buffer, it displays
3254 that buffer. (This is handy if you have many manuals in many *info*
3255 buffers, and don't remember the name of the buffer visiting the manual
3256 you want to consult.) Otherwise, it loads and displays the manual.
3258 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3259 This is for compatibility with the stand-alone Info reader program,
3260 and also because `Info-edit' is a rarely used command that is disabled
3263 ** Mail mode changes (not Message mode)
3265 *** New command M-x mail-add-attachment for adding MIME attachments
3267 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3268 (Its name is misleading, since it has nothing to do with MIME
3269 attachments.) The old name is now an obsolete alias to the new name.
3271 ** MH-E has been updated to MH-E version 8.3.1.
3272 See MH-E-NEWS for details.
3274 ** Modula-2 mode provides auto-indentation.
3276 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3278 ** nXML mode no longer binds C-RET to `nxml-complete'.
3279 Completion is now performed via `completion-at-point', bound to C-M-i
3280 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3281 default), this performs tag completion.
3283 ** Org mode has been updated to version 7.8.09.
3284 See ORG-NEWS for details.
3286 ** Prolog mode has been completely revamped, with lots of additional
3287 functionality such as more intelligent indentation, electricity,
3288 support for more variants, including Mercury, and a lot more.
3292 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3293 in the Rmail incoming message.
3295 *** The variable `rmail-message-filter' no longer has any effect.
3296 This change was made in Emacs 23.1 but was not advertised at the time.
3297 Try using `rmail-show-message-hook' instead.
3301 *** M-x shell prompts for the shell path name if the default directory
3302 is a remote file name and neither the environment variable $ESHELL nor
3303 the variable `explicit-shell-file-name' is set.
3305 *** TAB is now bound to the standard `completion-at-point' command,
3306 which now implements the pcomplete rules for shell command completion.
3310 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3311 if the mail server supports them. This uses either built-in GnuTLS
3312 support, or the starttls.el library. Customize `smtpmail-stream-type'
3315 *** The variable `smtpmail-auth-credentials' has been removed.
3316 By default, the information is now stored in the file ~/.authinfo.
3317 This was the default value of smtpmail-auth-credentials. If you had
3318 customized smtpmail-auth-credentials to a list of user names and
3319 passwords, those settings are not used. During your first connection
3320 to the smtp server, Emacs will prompt for the user name and password,
3321 and offer to save them to ~/.authinfo. Or you can manually copy the
3322 credentials to ~/.authinfo. For example, if you had
3324 (setq smtpmail-auth-credentials
3325 '(("mail.example.org" 25 "jim" "s!cret")))
3327 then the equivalent line in ~/.authinfo would be
3329 machine mail.example.org port 25 login jim password s!cret
3331 See the auth-source manual for more information, e.g. on encrypting
3332 the credentials file.
3334 *** The variable `smtpmail-starttls-credentials' has been removed.
3335 If you had that set, you need to put
3337 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3339 in your ~/.authinfo file instead.
3341 *** SMTPmail defaults to using the address in the From: header as the
3342 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3343 to the address you wish to use instead.
3347 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3348 and `sql-oracle-scan-on'.
3350 *** New options controlling prompting for login parameters.
3351 Each supported product has a custom variable `sql-*-login-params',
3352 which is a list of the parameters to be prompted for before a
3353 connection is established.
3355 *** The command `sql-product-interactive' now takes a prefix argument,
3356 which causes it to prompt for an SQL product.
3358 *** Product-specific SQL interactive commands now take prefix arguments.
3359 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3360 given a prefix argument, prompt for a name for the SQL interactive
3361 buffer. This reduces the need for calling `sql-rename-buffer'.
3363 *** SQL interactive modes suppress command continuation prompts, and
3364 replace tabs with spaces. The first change impacts multiple line SQL
3365 statements entered with C-j between each line, statements yanked into
3366 the buffer and statements sent with `sql-send-*' functions. The
3367 second prevents the MySQL and Postgres interpreters from listing
3368 object name completions when sent text via `sql-send-*' functions.
3370 *** New command `sql-connect' starts a predefined SQLi session,
3371 using the login parameters from `sql-connection-alist'.
3373 *** New "Save Connection" menu item in SQLi buffers.
3374 This gathers the login params specified for the SQLi session, if it
3375 was not started by a connection, and saves them as a new connection.
3377 *** New commands for listing database objects and details:
3378 sql-list-all and sql-list-table.
3380 *** An API for manipulating SQL product definitions has been added.
3384 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3388 *** New inline access method "ksu" (kerberized su).
3390 *** The following access methods are discontinued: "ssh1_old",
3391 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3393 *** The user option `remote-file-name-inhibit-cache' controls whether
3394 remote file attributes are cached for better performance.
3396 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3397 default value to "".
3399 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3400 for remote machines which support SELinux.
3402 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3403 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3404 the degree of parallelism.
3406 ** VC and related modes
3408 *** Support for pulling on distributed version control systems.
3409 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3410 supported (currently with Bzr, Git, and Mercurial), to update the
3411 current branch and working tree. A prefix argument means to prompt
3412 the user for specifics, e.g. a pull location.
3414 *** `vc-update' is now an alias for `vc-pull'.
3416 *** Support for merging on distributed version control systems.
3417 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3418 is supported (currently with Bzr, Git, and Mercurial), to merge
3419 changes from another branch into the current one. It prompts for
3420 specifics, e.g. a merge source.
3422 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3423 shows a diff while querying the user. It defaults to t.
3425 *** Log entries in some Log View buffers can be toggled to display a
3426 longer description by typing RET (log-view-toggle-entry-display).
3427 This is currently supported for Bzr, Git, and Mercurial (to support
3428 another backend, define a `log-view-expanded-log-entry-function').
3429 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3430 use this to display the full log entry for the revision at point.
3432 *** New command `vc-ediff' allows visual comparison of two revisions
3433 of a file similar to `vc-diff', but using ediff backend.
3435 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3436 this was not advertised at the time.
3438 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3439 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3440 this was not advertised at the time.
3446 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3448 *** partial-completion-mode (complete.el) is obsolete.
3449 You can get a comparable behavior with:
3450 (setq completion-styles '(partial-completion initials))
3451 (setq completion-pcm-complete-word-inserts-delimiters t)
3453 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3455 *** pgg is obsolete (use EasyPG instead).
3457 *** sregex.el is obsolete, since rx.el is a strict superset.
3459 *** s-region.el and pc-select.el are obsolete.
3460 They are superseded by shift-select-mode, enabled by default since 23.1.
3462 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3466 *** The Landmark game is now invoked with `landmark', not `lm'.
3467 Its functions and variables have been similarly renamed.
3469 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3470 (This interfered with cua-mode.)
3472 *** f90.el has some support for Fortran 2008 syntax.
3474 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3476 *** New command `nato-region' converts text to NATO phonetic alphabet.
3479 * New Modes and Packages in Emacs 24.1
3481 ** Occur Edit mode applies edits made in *Occur* buffers to the
3482 original buffers. It is bound to "e" in Occur mode.
3484 ** New global minor mode electric-pair-mode.
3485 When enabled, typing an open parenthesis automatically inserts the
3486 matching closing one.
3488 ** New global minor mode electric-indent-mode.
3489 When enabled, typing certain characters triggers reindentation.
3490 Major modes wishing to use this can set electric-indent-chars or
3491 electric-indent-functions.
3493 ** New global minor mode electric-layout-mode.
3494 When enabled, typing certain characters automatically inserts newlines.
3495 Major modes wishing to use this can set electric-layout-rules.
3497 ** tabulated-list.el provides a generic major mode for tabulated data,
3498 from which other modes can be derived.
3500 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3502 ** secrets.el is an implementation of the Secret Service API, an
3503 interface to password managers like GNOME Keyring or KDE Wallet. The
3504 Secret Service API requires D-Bus for communication. The command
3505 `secrets-show-secrets' offers a buffer with a visualization of the
3508 ** notifications.el provides an implementation of the Desktop
3509 Notifications API. It requires D-Bus for communication.
3511 ** soap-client.el supports access to SOAP web services from Emacs.
3512 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3514 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3516 ** New emacs-lock.el package.
3517 The previous version has been moved to obsolete/old-emacs-lock.el.
3518 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3519 against exiting Emacs and killing the buffer can be set separately.
3520 The mechanism for automatically turning off protection for buffers
3521 with dead inferior processes has been generalized.
3524 * Incompatible Lisp Changes in Emacs 24.1
3526 ** Passing a nil argument to a minor mode function call now ENABLES
3527 the minor mode unconditionally. This is so that you can write e.g.
3529 (add-hook 'text-mode-hook 'foo-mode)
3531 to enable foo-mode in Text mode buffers, removing the need for
3532 `turn-on-foo-mode' style functions. This affects all mode commands
3533 defined by `define-minor-mode'. If called interactively, the mode
3534 command still toggles the minor mode.
3536 ** The return value of `backup-buffer' has changed.
3537 It is now a list of three elements, where the second element is a list
3538 describing the original file's SELinux context. If Emacs or the
3539 system lacks SELinux support, the context list is (nil nil nil nil).
3540 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3542 ** `char-direction-table' and the `char-direction' function were deleted.
3543 They were buggy and inferior to the new support of bidirectional
3544 editing introduced in Emacs 24. If you need the bidirectional
3545 properties of a character, use `get-char-code-property' with the last
3546 argument `bidi-class'.
3548 ** `copy-directory' now copies the source directory as a subdirectory
3549 of the target directory, if the latter is an existing directory. The
3550 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3551 the contents directly into a pre-existing target directory.
3553 ** For mouse click input events in the text area, the Y pixel
3554 coordinate in the POSITION list now counts from the top of the text
3555 area, excluding any header line. Previously, it counted from the top
3558 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3559 been further reduced. Now a backquote not followed by a space is
3560 always treated as a "new-style" backquote. Please remove all
3561 "old-style" backquotes from your code. If your code uses backquotes
3562 as documented in the Elisp manual, and compiles without warning, then
3563 you have nothing to do in this regard. Code not following the
3564 appropriate conventions may fail to compile.
3566 The most common cause of trouble seems to be an old-style backquote
3567 followed by a newline. Another cause of trouble is vector notation
3568 for key sequence notation: instead of [(control ,)] and [(control ')],
3569 you should write [(control ?,)] and [(control ?')], which will work in
3572 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3573 was not advertised at the time. The function `custom-initialize-delay'
3574 replaced all known uses.
3576 ** `view-buffer' now treats special mode-class in the same way that
3577 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3578 major mode is special).
3580 ** Menu and tool bar changes
3582 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3583 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3584 With these alist entries omitted, `make-frame' checks the value of the
3585 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3586 a menu-bar or tool-bar, respectively. If the alist entries are added,
3587 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3589 *** The menu bar bindings's caches are not used any more.
3590 Use (where-is-internal <def> nil t) instead.
3592 ** Regions created by mouse dragging are now normal active regions,
3593 similar to those created by shift-selection (see Selection changes
3594 above). In previous Emacs versions, these regions were delineated by
3595 `mouse-drag-overlay'; that variable has been removed.
3597 ** The fourth argument of `filter-buffer-substring' has been removed.
3598 If you want to remove text properties from the final result, simply
3599 pass the result through substring-no-properties.
3601 ** cl.el no longer provides `cl-19'.
3603 ** The following obsolete functions and aliases have been removed
3604 (the appropriate new function is given in parentheses; "not needed"
3605 means you can just remove all calls to the function in question):
3607 *** `comint-kill-output' (`comint-delete-output')
3608 *** `decompose-composite-char' (`char-to-string')
3609 *** `outline-visible' (`outline-invisible-p')
3610 *** `internal-find-face' (`facep')
3611 *** `internal-get-face' (`facep and check-face')
3612 *** `frame-update-faces' (not needed)
3613 *** `frame-update-face-colors' (`frame-set-background-mode')
3614 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3615 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3616 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3617 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3618 *** `x-make-font-unbold' (`make-face-unbold')
3619 *** `x-make-font-unitalic' (`make-face-unitalic')
3620 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3621 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3622 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3623 *** `char-bytes' (== 1)
3624 *** `isearch-return-char' (`isearch-printing-char')
3625 *** `make-local-hook' (not needed)
3626 *** `set-screen-height' (`set-frame-height')
3627 *** `set-screen-width' (`set-frame-width')
3629 ** The following obsolete variables and varaliases have been removed
3630 (the appropriate new variable is given in parentheses):
3632 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3633 *** `vc-header-alist' (`vc-BACKEND-header')
3634 *** `directory-sep-char' (== ?/)
3635 *** `font-lock-defaults-alist' (`font-lock-defaults')
3636 *** `e' (`float-e').
3638 ** The following obsolete files were removed:
3639 sc.el, x-menu.el, rnews.el, rnewspost.el
3641 ** The format of the finder-inf.el file has changed, since the Finder
3642 mechanism is now based on the package system. The variable
3643 `finder-package-info' is replaced by `package--builtins' and
3644 `finder-keywords-hash'.
3646 ** When generating autoloads, `update-directory-autoloads' no longer
3647 assumes every inspected file is in your `load-path'. It instead
3648 generates relative names according to the current `load-path'.
3651 * Lisp Changes in Emacs 24.1
3653 ** Code can now use lexical scoping by default instead of dynamic scoping.
3654 The `lexical-binding' variable enables lexical scoping for local
3655 variables. It is typically set via a file-local variable in the first
3656 line of the file, in which case it applies to all the code in that
3659 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3660 binding instead of the old dynamic binding mode.
3662 *** Lexically scoped interpreted functions are represented with a new form
3663 of function value which looks like (closure ENV ARGS &rest BODY).
3665 *** New macro `letrec' to define recursive local functions.
3667 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3668 So do `defcustom' and other forms that call `defvar' as a subroutine.
3670 *** New function `special-variable-p' to check whether a variable is
3671 declared as dynamically bound.
3673 *** The form ((lambda ...) ...) is deprecated.
3675 ** An Emacs Lisp testing tool is now included.
3676 Emacs Lisp developers can use this tool to write automated tests for
3677 their code. See the ERT info manual for details.
3679 ** Changes for bidirectional display and editing
3681 *** New function `current-bidi-paragraph-direction'.
3682 This returns the base direction of the paragraph at point.
3684 *** New function `bidi-string-mark-left-to-right'.
3685 Given a string containing characters from right-to-left scripts, this
3686 function returns another string which can be safely inserted into a
3687 buffer, such that any following text will be always displayed to the
3688 right of that string. (This works by appending an invisible Unicode
3689 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3691 This is useful when the buffer has overall left-to-right paragraph
3692 direction and you need to insert a string whose contents are not known
3693 in advance, without disrupting the layout of the line.
3697 *** Window tree functions are accessible in Elisp.
3698 Functions are provided to return the parent, siblings or child windows
3699 of any window including internal windows (windows not associated with a
3700 buffer) in the window tree.
3702 **** New function `window-valid-p' gives non-nil for live and internal
3705 **** Window manipulation can deal with internal windows.
3706 Many window handling functions like `split-window', `delete-window', or
3707 `delete-other-windows' as well as the window resizing functions can now
3708 act on any window including internal ones.
3710 *** window-total-height/-width vs window-body-height/-width.
3711 The function `window-height' has been renamed to `window-total-height'
3712 and `window-width' has been renamed to `window-body-width'. The old
3713 names are provided as aliases. Two new functions `window-total-width'
3714 and `window-body-height' are provided.
3716 *** Window parameters specific to window handling functions.
3717 For each window you can specify a parameter to override the default
3718 behavior of a number of functions like `split-window', `delete-window'
3719 and `delete-other-windows'. The variable `ignore-window-parameters'
3720 allows to ignore processing such parameters.
3722 *** New semantics of third argument of `split-window'.
3723 The third argument of `split-window' has been renamed to SIDE and can be
3724 set to any of the values 'below, 'right, 'above, or 'left to make the
3725 new window appear on the corresponding side of the window that shall be
3726 split. Any other value of SIDE will cause `split-window' to split the
3727 window into two side-by-side windows as before.
3729 *** Window resizing functions.
3730 A new standard function for resizing windows called `window-resize' has
3731 been introduced. This and all other functions for resizing windows no
3732 longer delete any windows when they become too small.
3734 *** Deleting the selected window now selects the most recently selected
3735 live window on that frame instead.
3737 *** `adjust-window-trailing-edge' adjustments.
3738 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3739 is able to resize other windows if a window adjacent to the trailing
3740 edge cannot be shrunk any more. This makes its behavior more similar to
3741 that of Emacs 21 without compromising, however, its inability to delete
3742 windows which was introduced in Emacs 22.
3744 *** Window-local buffer lists.
3745 Windows now have local buffer lists. This means that removing a buffer
3746 from display in a window will preferably show the buffer previously
3747 shown in that window with its previous window-start and window-point
3748 positions. This also means that the same buffer may be automatically
3749 shown twice even if it already appears in another window.
3751 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3752 which if non-nil requires the buffer to be displayed in the currently
3753 selected window, signaling an error otherwise. If nil, another window
3754 can be used, e.g. if the selected one is strongly dedicated.
3756 *** `split-window-vertically' and `split-window-horizontally' renamed
3757 to `split-window-below' and `split-window-right' respectively.
3758 The old names are kept as aliases.
3762 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3763 named ACTION, and takes a display action of the same form as
3764 `display-buffer-base-action' (see Changes, above). A non-nil,
3765 non-list value is treated specially, as the old meaning.
3767 **** New variable `display-buffer-overriding-action'.
3769 **** The procedure of `display-buffer' etc. to choose a window is
3770 determined by combining `display-buffer-overriding-action',
3771 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3772 and `display-buffer-fallback-action'. The second and fourth of these
3773 are user-customizable variables.
3775 See the docstring of `display-buffer' for details.
3777 *** New functions `window-state-get' and `window-state-put'.
3778 These functions allow to save and restore the state of an arbitrary
3779 frame or window as an Elisp object.
3783 *** New variable `completion-extra-properties' used to specify extra
3784 properties of the current completion:
3785 - :annotate-function, same as the old completion-annotate-function.
3786 - :exit-function, function to call after completion took place.
3788 *** Functions on `completion-at-point-functions' can return any of the
3789 properties valid for `completion-extra-properties'.
3791 *** `completion-annotate-function' is obsolete.
3793 *** New `metadata' method for completion tables. The metadata thus returned
3794 can specify various details of the data returned by `all-completions':
3795 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3796 used to select a style in completion-category-overrides.
3797 - `annotation-function' to add annotations in *Completions*.
3798 - `display-sort-function' to specify how to sort entries in *Completions*.
3799 - `cycle-sort-function' to specify how to sort entries when cycling.
3801 *** `minibuffer-local-filename-must-match-map' is not used any more.
3802 Instead, the bindings in `minibuffer-local-filename-completion-map'
3803 are combined with `minibuffer-local-must-match-map'.
3805 *** New variable `completing-read-function' allows overriding the
3806 behavior of `completing-read'.
3808 ** `glyphless-char-display' can now distinguish between graphical and
3809 text terminal display, via a char-table entry that is a cons cell.
3811 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3812 Instead, the offending function is removed.
3816 *** New function `run-hook-wrapped' for running an abnormal hook by
3817 passing the hook functions as arguments to a "wrapping" function.
3818 Like `run-hook-with-args-until-success', it stops at the first
3819 non-nil return value.
3821 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3822 set of "wrapping" filters, similar to around advice.
3823 (A version of this macro was actually added in Emacs 23.2 but was not
3824 advertised at the time.)
3828 *** New macro `condition-case-unless-debug' (this was actually added in
3829 Emacs 23.1 as condition-case-no-debug, but not advertised)
3831 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3833 *** Variable `stack-trace-on-error' removed.
3835 *** The debugger can now "continue" from an error, which means it will
3836 jump to the error handler as if the debugger had not been invoked
3837 instead of jumping all the way to the top-level.
3839 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3840 This can be useful when `inhibit-quit' is set.
3842 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3843 named Emacs server instances.
3845 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3846 to redirect STDOUT to a file.
3848 ** The function `format-time-string' now supports the %N directive,
3849 for higher-resolution time stamps.
3851 ** New input reading functions
3853 *** New function `read-char-choice' reads a restricted set of
3854 characters, discarding any inputs not inside the set.
3856 *** The command `read-color' now requires a match for a color name
3857 or RGB triplet, instead of signaling an error if the user provides
3860 **** `facemenu-read-color' is now an alias for `read-color'.
3862 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3863 The variable is now used to load all kind of supported dynamic libraries,
3864 not just image libraries. The previous name is still available as an
3867 ** Syntax parsing changes
3869 *** New variable `syntax-propertize-function'.
3870 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3871 This allows syntax-table properties to be set independently from font-lock:
3872 just call syntax-propertize to make sure the text is propertized.
3873 Together with this new variable come a new hook
3874 syntax-propertize-extend-region-functions, as well as two helper functions:
3875 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3876 as-is; and syntax-propertize-rules which provides a new way to specify
3879 *** Syntax tables support a new "comment style c" additionally to style b.
3881 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3883 ** frame-local variables cannot be let-bound any more.
3885 ** Major and minor mode changes
3887 *** `set-auto-mode' now respects mode: local variables at the end of files,
3888 as well as those in the -*- line.
3890 *** `prog-mode' is a new major mode from which programming modes
3893 **** `prog-mode-hook' can be used to enable features for programming
3894 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3895 on-the-fly spell checking for comments and strings.
3897 *** New hook `change-major-mode-after-body-hook', run by
3898 `run-mode-hooks' just before any other mode hooks.
3900 *** Enabled globalized minor modes can be disabled in specific major modes.
3901 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3902 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3904 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3906 ** File-handling changes
3908 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3909 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3910 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3911 argument is supplied (see Trash changes, above).
3913 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3915 ** Tool-bars can display separators.
3916 Tool-bar separators are handled like menu separators in menu-bar maps,
3917 i.e. via menu entries of the form `(menu-item "--")'.
3921 *** Animated images support (currently animated gifs only).
3923 **** `image-animated-p' returns non-nil if an image can be animated.
3925 **** `image-animate' animates a supplied image spec.
3927 **** `image-animate-timer' returns the timer object for an image that
3930 *** `image-extension-data' has been renamed to `image-metadata'.
3931 The old name is an obsolete alias to the new one.
3933 *** Image mode can view any image type that ImageMagick supports.
3934 This requires Emacs to be built with ImageMagick support.
3936 **** New function `imagemagick-types', defined if ImageMagick support
3937 is enabled, returns a list of image file extensions that your
3938 ImageMagick installation supports.
3940 **** New function `imagemagick-register-types' enables ImageMagick
3941 image types in Image mode and in `create-image' and other helper
3944 **** New option `imagemagick-types-inhibit' excludes certain
3945 ImageMagick image types from `imagemagick-register-types'.
3947 **** With ImageMagick support, there are extra Image mode commands to
3948 resize and rotate images: `image-transform-fit-to-height',
3949 `image-transform-fit-to-width', `image-transform-set-rotation', and
3950 `image-transform-set-scale'.
3952 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3953 passes it to the mail user agent function. This argument specifies an
3954 action for returning to the caller after finishing with the mail. For
3955 example, this is used by Rmail to optionally delete a mail window.
3957 ** XML and HTML parsing
3958 If Emacs is compiled with libxml2 support, there are two new
3959 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3960 and `libxml-parse-xml-region' (which parses XML). Both return an
3961 Emacs Lisp parse tree.
3963 ** Networking and encryption changes
3965 *** `open-network-stream' can now be used to open an encrypted stream.
3966 It now accepts an optional `:type' parameter for initiating a TLS
3967 connection, directly or via STARTTLS. To do STARTTLS, additional
3968 parameters (`:end-of-command', `:success', `:capabilities-command')
3969 must also be supplied.
3971 *** New library gnutls.el.
3972 The new function `gnutls-available-p' returns non-nil if Emacs is
3973 built with GnuTLS support. The main entry points are
3974 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3975 these functions through `open-network-stream', because that can
3976 upgrade connections through STARTTLS opportunistically or use plain
3977 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3980 *** New primitive `secure-hash' that supports many secure hash algorithms:
3981 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3982 sha1.el has been removed. The `sha1' feature is provided by default.
3986 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3988 ** Progress reporters can now "spin".
3989 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3990 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3991 time you call `progress-reporter-update' on that progress reporter,
3992 with a nil or omitted VALUE argument, the reporter message is
3993 displayed with a "spinning bar".
3995 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3996 being reverted, even if the buffer has a local `revert-buffer-function'.
3998 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3999 If delayed-warnings-list is non-nil, the command loop calls
4000 `delayed-warnings-hook' after `post-command-hook'. At present, this
4001 is only used by Emacs on some platforms to display warnings during
4002 startup, which might otherwise not be noticed. This uses the
4003 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
4005 ** rx.el has a new `group-n' construct for explicitly numbered groups.
4007 ** New function `make-composed-keymap' that constructs a new keymap
4008 from multiple input maps. You can use this to make a keymap that
4009 inherits from multiple maps, eg:
4010 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4012 ** New function `string-prefix-p'.
4013 (This was actually added in Emacs 23.2 but was not advertised at the time.)
4015 ** New reader macro ## that stands for the empty symbol.
4016 This means that the empty symbol can now be read back. Also, #: by itself
4017 (when not immediately followed by a possible symbol character) stands for
4018 an empty uninterned symbol.
4020 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
4022 ** The following functions and variables are obsolete:
4024 *** `tooltip-use-echo-area' is obsolete.
4025 Rather than setting this to t, disable Tooltip mode instead.
4027 *** buffer-substring-filters is obsolete.
4028 Use `filter-buffer-substring-functions' instead.
4030 *** `byte-compile-disable-print-circle' is obsolete.
4032 *** `deferred-action-list' and `deferred-action-function' are obsolete.
4033 Use `post-command-hook' instead.
4035 *** `font-lock-maximum-size' is obsolete.
4038 * Changes in Emacs 24.1 on Non-Free Operating Systems
4040 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4041 and also when HOME is set to C:\ by default.
4043 ** New configure.bat options
4045 *** --enable-checking builds Emacs with extra runtime checks.
4047 *** --distfiles specifies files to be included in binary distribution.
4049 *** --without-gnutls disables automatic GnuTLS detection.
4051 *** --lib for general library linkage, works with the USER_LIBS build variable.
4053 ** New make target `dist' to create binary distribution for MS Windows.
4055 ** The Lisp function `w32-default-color-map' is now obsolete.
4056 (It is only used internally in the Emacs C code.)
4058 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4059 reappear on mouse-over. (Requires OS X 10.6 or later.)
4061 ** On Mac OS X, dragging a file into Emacs visits the file, like on
4062 other platforms, rather than inserting its contents into the buffer.
4065 ----------------------------------------------------------------------
4066 This file is part of GNU Emacs.
4068 GNU Emacs is free software: you can redistribute it and/or modify
4069 it under the terms of the GNU General Public License as published by
4070 the Free Software Foundation, either version 3 of the License, or
4071 (at your option) any later version.
4073 GNU Emacs is distributed in the hope that it will be useful,
4074 but WITHOUT ANY WARRANTY; without even the implied warranty of
4075 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4076 GNU General Public License for more details.
4078 You should have received a copy of the GNU General Public License
4079 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4084 paragraph-separate: "[
\f]*$"