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 ** Building Emacs now requires GNU make.
31 * Startup Changes in Emacs 24.5
34 * Changes in Emacs 24.5
37 ** The default value of `history-length' has increased to 100.
40 * Editing Changes in Emacs 24.5
43 * Changes in Specialized Modes and Packages in Emacs 24.5
46 ** The Rmail commands d, C-d and u now handle repeat counts
47 to delete or undelete multiple messages.
55 * New Modes and Packages in Emacs 24.5
58 * Incompatible Lisp Changes in Emacs 24.5
61 * Lisp Changes in Emacs 24.5
64 ** You can specify a function's interactive-only property via `declare'.
65 However you specify it, the property affects `describe-function' output.
68 * Changes in Emacs 24.5 on Non-Free Operating Systems
71 * Installation Changes in Emacs 24.4
74 ** Emacs can now be compiled with ACL support.
75 This happens by default if a suitable support library is found at
76 build time, like libacl on GNU/Linux. To prevent this, use the
77 configure option `--disable-acl'. See below for related features.
80 ** Emacs can now be compiled with file notification support.
81 This happens by default if a suitable system library is found at
82 build time. To prevent this, use the configure option
83 `--without-file-notification'. See below for file-notify features.
84 This feature is not available for the Nextstep port.
87 ** Emacs can now be compiled with zlib support.
88 This happens by default if zlib is present, which it normally is.
89 To prevent this, use the configure option `--without-zlib'.
90 This provides the function `zlib-decompress-region'; see below for details.
93 ** The configure option `--without-compress-info' has been generalized,
94 and renamed to `--without-compress-install'. It now prevents compression
95 of _any_ files during installation.
98 ** The configure option `--with-crt-dir' has been removed.
99 It is no longer needed, as the crt*.o files are no longer linked specially.
102 ** Directories passed to configure option `--enable-locallisppath' are
103 no longer created during installation.
106 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
107 This requires pkg-config to be available at build time.
110 * Startup Changes in Emacs 24.4
113 ** When initializing `load-path', an empty element in the EMACSLOADPATH
114 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
115 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
116 load-path (the one that would have been used if EMACSLOADPATH was unset).
117 This makes it easier to _extend_ the load-path via EMACSLOADPATH
118 (previously, EMACSLOADPATH had to specify the complete load-path,
119 including the defaults). (In older versions of Emacs, an empty element
120 was replaced by ".", so use an explicit "." now if that is what you want.)
123 ** The -L option, which normally prepends its argument to load-path,
124 will instead append, if the argument begins with `:' (or `;' on MS Windows;
125 i.e., `path-separator').
128 ** If you use either site-load.el or site-init.el to customize the dumped
129 Emacs executable, any changes to `load-path' that these files make
130 will no longer be present after dumping. To affect a permanent change
131 to `load-path', use the `--enable-locallisppath' option of `configure'.
134 ** The user option `initial-buffer-choice' can now specify a function
135 to set up the initial buffer.
138 * Changes in Emacs 24.4
141 ** New function `zlib-decompress-region', which decompresses gzip- and
142 zlib-format compressed data using built-in zlib support, if available.
145 ** New option `gnutls-verify-error', if non-nil, means that Emacs
146 should reject SSL/TLS certificates that GnuTLS determines as invalid.
147 (This option defaults to nil at present, but this is expected to change
148 in a future release.)
151 ** Emacs now supports menus on text-mode terminals.
152 If the terminal supports a mouse, clicking on the menu bar, or on
153 sensitive portions of the mode line or header line, will drop down the
154 menu defined at that position. Likewise, clicking C-mouse-2 or
155 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
158 If the text terminal does not support a mouse, you can activate the
159 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
161 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
162 customize the option `tty-menu-open-use-tmm' to a non-nil value.
163 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
167 ** The *Messages* buffer is created in `messages-buffer-mode',
168 a new major mode, with read-only status. Any code that might create
169 the *Messages* buffer should call the function `messages-buffer' to do
170 so and set up the mode.
173 ** Emacs can now support ACLs (access control lists).
174 This requires a suitable support library to be found at build time.
175 On GNU/Linux, the POSIX ACL interface is used via libacl.
176 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
179 *** Emacs preserves the ACL entries of files when backing up.
181 *** New functions `file-acl' and `set-file-acl' get and set the ACL
184 ** Multi-monitor support has been added.
187 *** New functions `display-monitor-attributes-list' and
188 `frame-monitor-attributes' can be used to obtain information about
189 each physical monitor on multi-monitor setups.
192 *** The functions `display-pixel-width' and `display-pixel-height' now
193 behave consistently among the platforms: they return the pixel width
194 or height for all physical monitors associated with the given display
195 as if they were on X. To get information for each physical
196 monitor, use the new functions above. Similar notes also apply to
197 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
198 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
201 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
202 You can change the default by customizing `blink-cursor-blinks'.
205 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
206 This affects View mode, etc.
211 *** The command `apropos-variable' is renamed to `apropos-user-option'.
212 `apropos-user-option' shows all user options while `apropos-variable'
213 shows all variables. When called with a universal prefix argument,
214 the two commands swap their behaviors. When `apropos-do-all' is
215 non-nil, they output the same results.
218 *** The key `?' now describes prefix bindings, like `C-h'.
221 *** The command `describe-function' has been extended for EIEIO.
222 Running it on constructors will show a full description of the
223 generated class. For generic functions, it will show all
224 implementations together with links to the source. The old commands
225 `describe-class', `describe-constructor' and `describe-generic' were
229 *** The function `quail-help' is no longer an interactive command.
230 Use `C-h C-\' (`describe-input-method') instead.
235 *** ImageMagick images now support the :max-width and :max-height keywords.
238 *** When using `create-image' with image data, you can pass a :format
239 attribute (via the property-list argument) in order to help
240 ImageMagick detect the image type. The value should be a MIME
241 content-type that is found in the new variable `image-format-suffixes'.
243 ** Frame and window changes
246 *** The function `window-in-direction' introduced in Emacs 24.1 now
247 takes additional arguments for specifying a reference point, wrapping
248 selection around frame borders, and specifying ways to select the
252 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
253 bound to <f11> and M-<f10>, respectively.
256 *** New hooks `focus-in-hook', `focus-out-hook'.
257 These are normal hooks run when an Emacs frame gains or loses input focus.
260 *** Emacs can now change frame sizes in units of pixels, rather than
261 text rows or columns. When maximizing a frame or making it fullscreen,
262 remaining extra pixels are no longer given to the minibuffer, the rightmost
263 fringe, or other unusable space, but are distributed among the text
264 areas of the frame's windows. If the new option `frame-resize-pixelwise'
265 is non-nil, all frame size changes happen pixelwise and set the
266 corresponding size hints for the window manager.
269 *** Emacs can now change window sizes in units of pixels.
270 Mouse-dragging a mode line or window divider now changes the size of
271 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
272 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
273 resize windows pixelwise. Most functions for changing or accessing
274 window sizes now have an additional argument that allows changes to apply,
275 or values to be returned, in pixels instead of lines/columns.
278 *** The functions `window-body-height' and `window-body-width' now never
279 count partially visible lines or columns if called with a nil PIXELWISE
283 *** Emacs can now draw dividers between adjacent windows. To put
284 dividers between side-by-side/vertically stacked windows customize the
285 frame parameters `right-divider-width' and `bottom-divider-width' to
286 some positive integer. You can drag dividers with the mouse (they show
287 a corresponding cursor when the mouse hovers over them). You can change
288 the appearance of dividers by customizing the faces `window-divider',
289 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
290 two are useful to provide a 3D effect, or to better distinguish dividers
291 from surrounding display objects.
294 *** New functions are provided to return the pixel sizes of window
295 components, namely `window-scroll-bar-width', `window-mode-line-height'
296 `window-header-line-height', `window-right-divider-width' and
297 `window-bottom-divider-width'.
300 *** The new function `window-text-pixel-size' returns the size of the
301 text of a window's buffer in pixels. This allows functions like
302 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
303 window to its buffer as it will be displayed.
306 *** `fit-window-to-buffer' can now resize windows in both dimensions.
307 This behavior is controlled by the new option
308 `fit-window-to-buffer-horizontally'. The new option
309 `fit-frame-to-buffer' allows to fit the window's frame to its buffer.
312 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
313 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
314 control the size of the frame and its position on screen.
317 *** Temp Buffer Resize Mode can now adjust height and width of windows
318 and frames. `temp-buffer-resize-mode' is now able to adjust the height
319 and the width of a window displaying a temporary buffer. The new option
320 `temp-buffer-max-width' allows to control the width of temporary buffer
321 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
322 and the buffer appears in the root window of a frame, Temp Buffer Resize
323 Mode will try to adjust width and/or height of the frame.
326 *** `split-window' is now a non-interactive function, not a command.
327 As a command, it was a special case of `C-x 2' (`split-window-below'),
328 and as such superfluous. After being reimplemented in Lisp, its
329 interactive form was mistakenly retained.
332 *** The functions `window-size' and `window-total-size' now have an
333 optional argument to return a rounded size value.
336 *** `window-state-put' now allows to put a window state into internal
340 *** New option `scroll-bar-adjust-thumb-portion'.
341 Available only on X, this option allows to control over-scrolling
342 using the scroll bar (i.e. dragging the thumb down even when the end
343 of the buffer is visible).
346 *** New basic action function `display-buffer-in-previous-window' has
347 `display-buffer' display a buffer in a window previously showing that
351 *** New basic action function `display-buffer-at-bottom' has
352 `display-buffer' choose or make a window at the bottom of the selected
356 *** New display action function `display-buffer-no-window' to not
357 display the buffer in a window.
360 *** New display action alist entry `allow-no-window' to indicate the
361 caller of `display-buffer' is ready to handle the case of not
362 displaying the buffer in a window.
364 ** Lisp evaluation changes
366 *** `eval-defun' on an already defined defcustom calls the :set function,
370 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
371 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
372 zero prefix argument. This disables truncation of lists in the output,
373 equivalent to setting `(eval-expression-)print-length' and
374 `(eval-expression-)print-level' to nil. Additionally, it causes integers
375 to be printed in other formats (octal, hexadecimal, and character).
378 *** New hook `eval-expression-minibuffer-setup-hook' run by
379 `eval-expression' on entering the minibuffer.
382 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
385 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
386 because it affects caching of paragraph scanning results as well.
387 There is no reason to set this to nil except for debugging purposes.
390 ** The option `set-mark-default-inactive' has been deleted.
391 This unfinished feature was introduced by accident in Emacs 23.1;
392 simply disabling Transient Mark mode does the same thing.
395 ** The default value of `comment-use-global-state' is now t,
396 and this variable has been marked obsolete.
399 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
400 and works for git too, if you fetch the repository notes.
403 ** New option `load-prefer-newer' affects how the `load' function chooses
404 the file to load. If this is non-nil, then when both .el and .elc
405 versions of a file exist, and the caller did not explicitly specify
406 which one to load, then the newer file is loaded. The default, nil,
407 means to always load the .elc file.
410 * Editing Changes in Emacs 24.4
412 ** Indentation changes
415 *** `electric-indent-mode' is now enabled by default.
416 E.g., typing RET reindents the current line and indents the new line.
417 `C-j' inserts a newline but does not indent.
420 *** New buffer-local `electric-indent-local-mode'.
423 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
424 When invoked without a prefix argument, it now activates a transient
425 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
426 the text indentation in the region. Typing any other key resumes
427 normal editing behavior.
430 *** `tab-stop-list' is now implicitly extended to infinity by repeating
431 the last step. Its default value is changed to nil, which means a tab
432 stop every `tab-width' columns.
435 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
436 When called in succession, it cycles between spacing conventions:
437 one space, no spaces, original spacing.
440 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
441 a line after a one-letter word, which is an error in some typographical
442 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
445 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
448 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
449 Most commands are still unaware of it, but kill/yank do work on the rectangle.
452 ** New option `visual-order-cursor-movement'.
453 If this is non-nil, cursor motion with arrow keys will follow the
454 visual order of characters on the screen: <left> always moves to the
455 left, <right> always moves to the right, disregarding the surrounding
456 bidirectional context.
461 *** All interactive commands that read a register (`copy-to-register', etc.)
462 now display a temporary window after `register-preview-delay' seconds
463 that summarizes existing registers. To disable this, set that option to nil.
464 Interactive commands that read registers and want to make use of this
465 should use `register-read-with-preview' to read register names.
468 *** New command `frameset-to-register' bound to `C-x r f', replacing
469 `frame-configuration-to-register'. It offers similar functionality,
470 plus enhancements like the ability to restore deleted frames.
471 (`frame-configuration-to-register' still exists, but no longer has a
475 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
479 ** New command `delete-duplicate-lines'.
480 This searches the region for identical lines, and removes all but one
481 copy of each repeated line. The lines need not be sorted.
484 ** `blink-matching-paren' now only highlights the matching open-paren
485 by default, instead of moving cursor. Set this variable to `jump' to
486 enable the old behavior.
489 * Changes in Specialized Modes and Packages in Emacs 24.4
492 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
494 ~/.emacs.d/timelog replaces ~/.timelog
495 ~/.emacs.d/vip replaces ~/.vip
496 ~/.emacs.d/viper replaces ~/.viper
497 ~/.emacs.d/ido.last replaces ~/.ido.last
498 ~/.emacs.d/kkcrc replaces ~/.kkcrc
499 ~/.emacs.d/quickurls replaces ~/.quickurls
500 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
501 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
502 ~/.emacs.d/places replaces ~/.emacs-places
503 ~/.emacs.d/shadows replaces ~/.shadows
504 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
505 ~/.emacs.d/strokes replaces ~/.strokes
506 ~/.emacs.d/notes replaces ~/.notes
507 ~/.emacs.d/type-break replaces ~/.type-break
508 Also the following files used by the now obsolete otodo-mode.el:
509 ~/.emacs.d/todo-do replaces ~/.todo-do
510 ~/.emacs.d/todo-done replaces ~/.todo-done
511 ~/.emacs.d/todo-top replaces ~/.todo-top
513 ** Backtrace and debugger
516 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
517 display of local variables of the current stack frame.
520 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
521 the lexical environment when evaluating the code in the context at point
522 (and so allows you to access lexical variables).
525 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
528 ** Battery information can now be retrieved from BSD's `apm' utility.
531 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
533 ** Calendar and Diary
536 *** New faces `calendar-weekday-header', `calendar-weekend-header',
537 and `calendar-month-header'.
540 *** New option `calendar-day-header-array'.
543 *** New variable `diary-from-outlook-function', used by the command
544 `diary-from-outlook'.
547 *** The variable `calendar-font-lock-keywords' is obsolete.
552 *** Calc by default now uses the Gregorian calendar for all dates, and
553 uses January 1, 1 AD as its day number 1. Previously Calc used the
554 Julian calendar for dates before September 14, 1752, and it used
555 December 31, 1 BC as its day number 1; the new scheme is more
556 consistent with Calendar's calendrical system and day numbering.
559 *** The new option `calc-gregorian-switch' lets you configure if
560 (and when) Calc switches from the Julian to the Gregorian calendar.
563 *** Support for ISO 8601 dates.
570 **** The cpp-root project now supports executing a compile command.
571 It can be set through the new :compile-command slot or the
572 buffer-local variable `compile-command'.
575 **** Better selection of include directories for the 'linux' project.
576 Include directories now support out-of-tree build directories and
577 target architecture auto-detection.
582 **** Improved detection of used namespaces in current scope in C++.
584 **** Parsing of default values for variables and function arguments in C/C++.
585 They are also displayed by the summarize feature in the mode line.
587 **** Improved parsing of function pointers in C/C++.
588 This also includes parsing of function pointers as function arguments.
590 **** Parsing of C/C++ preprocessor macros that open new scope.
591 For example, this enables parsing of macros that open new namespaces.
593 **** Support for 'this' pointer in inline member functions in C++.
598 *** New macro `cl-tagbody'.
599 This executes statements while allowing for control transfer to labels.
602 *** letf is now just an alias for cl-letf.
607 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
608 Hence, you can now enable it independently from those modes, and from
609 `transient-mark-mode'.
612 *** `cua-highlight-region-shift-only' is now obsolete.
613 You can disable `transient-mark-mode' to get the same result.
616 *** CUA's rectangles can now be used without CUA by calling the command
617 `cua-rectangle-mark-mode'.
622 *** Support for completion, ElDoc, and Flycheck has been added.
625 *** The current CFEngine syntax is parsed from "cf-promises -s json".
626 There is a fallback syntax available if you don't have cf-promises or
627 if your version doesn't support that option. See option `cfengine-cf-promises'.
630 ** Delete Selection mode can now be used without Transient Mark mode.
635 *** `desktop-save-mode' by default now auto-saves an existing desktop file
636 after `desktop-auto-save-timeout'. To disable this, customize that option
640 *** Desktop now saves and restores the frame/window configuration.
641 To disable this, set `desktop-restore-frames' to nil.
642 See also related options `desktop-restore-reuses-frames',
643 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
646 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
647 such as file ownership or permissions, are visible.
650 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
651 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
652 The results display in the mode line.
654 ** Electric Pair mode
657 *** New option `electric-pair-preserve-balance', enabled by default.
658 If non-nil, pairing/skipping only kicks in when that help the balance
659 of parentheses and quotes, i.e. the buffer should end up at least as
662 You can further control this behavior by adjusting the predicates
663 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
666 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
667 In `electric-pair-mode', the commands `backward-delete-char' and
668 `backward-delete-char-untabify' are now bound to electric variants
669 that delete the closer when invoked between adjacent pairs.
672 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
673 In `electric-pair-mode', inserting a newline between adjacent pairs
674 opens an extra newline after point, which is indented if
675 `electric-indent-mode' is also set.
678 *** New option `electric-pair-skip-whitespace', enabled by default.
679 This controls if skipping over closing delimiters should jump over any
680 whitespace slack. Setting it to `chomp' makes it delete this
681 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
684 *** New variables control the pairing in strings and comments.
685 You can customize `electric-pair-text-pairs' and
686 `electric-pair-text-syntax-table' to tweak pairing behavior inside
687 strings and comments.
690 ** New EPA option `epa-mail-aliases'.
691 You can set this to a list of email address aliases that `epa-mail-encrypt'
692 should use to find keys.
695 ** New ERC option `erc-accidental-paste-threshold-seconds'.
696 If set to a number, this can be used to avoid accidentally pasting large
697 amounts of data into the ERC input.
700 ** New ERT macro `skip-unless' allows skipping ERT tests.
701 See the ERT manual for details.
706 *** `eshell' now supports visual subcommands and options.
707 Eshell has been able to handle "visual" commands (interactive,
708 non-line oriented commands such as top that require display
709 capabilities not provided by eshell) by running them in an Emacs
710 terminal emulator. See `eshell-visual-commands'.
712 This feature has been extended to subcommands and options that make a
713 usually line-oriented command a visual command. Typical examples are
714 "git log" and "git <command> --help", which display their output in a
715 pager by default. See `eshell-visual-subcommands' and
716 `eshell-visual-options'.
719 *** New Eshell-Tramp module.
720 External su and sudo commands are now the default; the internal,
721 Tramp-using variants can still be used by enabling the eshell-tramp
725 ** New F90 mode option `f90-smart-end-names'.
728 Icomplete is now more similar to Ido.
731 *** Icomplete by default now applies to all forms of minibuffer completion.
732 The variable `icomplete-with-completion-tables' (now a user option)
733 controls this. To restore the old behavior, set it back to
734 '(internal-complete-buffer).
737 *** You can navigate through and select completions using the keys
738 from `icomplete-minibuffer-map'.
741 *** The string that separates potential completions is now a customizable
742 option (`icomplete-separator'). The default is " | " rather than ",".
745 *** New face `icomplete-first-match'; and new options
746 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
749 *** The option `icomplete-show-key-bindings' has been removed.
754 *** An Ido user manual is now included.
757 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
758 This means to use virtual buffers if the current ido input does not match
762 *** The variable `ido-decorations' can optionally have two new elements,
763 which are the brackets to use around the sole remaining completion.
768 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
769 visit the next image file and the previous image file in the same
770 directory, respectively.
773 *** New commands to show specific frames of multi-frame images.
774 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
775 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
778 *** New commands to speed up, slow down, or reverse animation.
779 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
780 speed up and slow down the animation. `a r' (`image-reverse-speed')
781 to reverse it and `a 0' (`image-reset-speed') to reset it.
784 *** The command `image-mode-fit-frame' deletes other windows.
785 When toggling, it restores the frame's previous window configuration.
786 It also has an optional frame argument, which can be used by Lisp
787 callers to fit the image to a frame other than the selected frame.
792 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
793 the symbol found near point.
796 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
797 will cycle through faces in `hi-lock-face-defaults' without prompting.
800 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
805 *** New Info face `info-index-match', used to highlight matches in index
806 entries displayed by `Info-index-next', `Info-virtual-index' and
810 *** The Info-edit command is obsolete. Editing Info nodes by hand
811 has not been relevant for some time.
816 *** New option `js-switch-indent-offset'.
819 *** Better indentation of multiple-variable declarations.
820 If a declaration spans several lines, variables on the following lines
821 are lined up to the first one.
824 *** Recognition and better indentation of continuations in array comprehensions.
827 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
832 *** Font locking for Texinfo comments and new keywords.
834 *** Completion in Octave file buffers.
838 *** Jump to definition.
840 *** Documentation lookup/search.
843 ** OPascal mode is the new name for Delphi mode
846 *** All delphi-* variables and functions have been renamed to opascal-*.
847 Obsolete aliases exist for those likely to have been used externally.
850 *** The option `delphi-newline-always-indents' has been removed.
851 Use `electric-indent-mode' instead.
854 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
859 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
860 to filter the list of packages by a keyword.
863 *** In the `describe-package' buffer, there are now buttons listing the
864 keywords related to the package. Click on a button to see other packages
865 related to that keyword.
868 *** The format of `archive-contents' files, generated by package
869 repositories, has changed to allow a new (fifth) element in the data
870 vectors, containing an associative list with extra properties.
871 (For example, `describe-package' uses the `:url' extra property to
872 display a "Homepage" header.)
875 ** In Prolog mode, `prolog-use-smie' has been removed,
876 along with the non-SMIE indentation code.
881 *** The new command `remember-notes' creates a buffer that is saved on exit.
882 You can use it as a more permanent *scratch* buffer.
885 *** Remember can now store notes in separate files.
886 To use this, add `remember-store-in-files' to the `remember-handler-functions'
887 option. The files are saved in `remember-data-directory' using
888 names specified by `remember-directory-file-name-format'.
893 *** Customize `rmail-mbox-format' to influence some minor aspects of
894 how Rmail displays non-MIME messages.
897 *** The `unrmail' command now converts from BABYL to mboxrd format,
898 rather than mboxo. Customize `unrmail-mbox-format' to change this.
903 *** Improved syntax highlighting and indentation.
906 *** New `electric-indent-mode' integration.
909 *** New option `ruby-encoding-magic-comment-style'.
912 *** New option `ruby-custom-encoding-magic-comment-template'.
915 *** New option `ruby-align-to-stmt-keywords'.
918 *** New option `ruby-align-chained-calls'.
921 *** More Ruby file types have been added to `auto-mode-alist'.
923 ** Search and Replace
926 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
927 starts a symbol (identifier) incremental search forward with the
928 symbol found near point added to the search string initially.
931 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
932 and adds it to the search string.
935 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
938 *** `query-replace' skips invisible text when `search-invisible' is nil,
939 and opens overlays with hidden text when `search-invisible' is `open'.
942 *** A negative prefix arg of replacement commands replaces backward.
943 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
944 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
947 *** By default, prefix arguments do not now terminate Isearch mode.
948 Set `isearch-allow-prefix' to nil to restore old behavior.
951 *** More Isearch commands accept prefix arguments, namely
952 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
956 *** Word search now matches whitespace at the beginning/end
957 of the search string if it contains leading/trailing whitespace.
958 In an incremental word search or when using a non-nil LAX argument
959 of `word-search-regexp', the lax matching can also match part of
960 the first word (in addition to the lax matching of the last word).
961 The same rules are now applied to the symbol search with the difference
962 that it matches symbols, and non-symbol characters between symbols.
965 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
968 ** The shell.el option `explicit-bash-args' includes --noediting by default.
969 All non-ancient Bash versions support this option.
974 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
977 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
982 *** You can customize the SMIE indentation of a mode via `smie-config'.
983 The command `smie-config-guess' can help you derive the appropriate
984 indentation settings, if you provide it with an indented sample file.
985 Use `smie-config-save' to save the result.
988 *** You can customize the SMIE indentation of a file by adding an entry to
989 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
992 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
997 *** Improved login monitoring and appropriate response to login failures.
998 New variable `sql-login-delay' defines maximum wait time for a connection.
1001 SQL*Plus script placeholders are properly highlighted and identified
1002 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
1003 are passed before the logon parameter, as required. The default now
1004 includes `-L', to limit the number of logon attempts per invocation.
1007 ** New Term mode option `term-suppress-hard-newline'.
1010 ** Todo mode has been rewritten and enhanced.
1011 The Todo mode user manual describes all commands and most user
1012 options. To support some of these features, a new file format is
1013 used, which is incompatible with the old format; however, you can
1014 convert old todo and done item files to the new format on initializing
1015 the first new todo file, or at any later time with the provided
1016 conversion command. The previous version of todo-mode.el has been
1017 renamed to otodo-mode.el and is now obsolete. New features include:
1019 *** Support for multiple todo files and archive files of done items.
1021 *** Renaming, reordering, moving, merging, and deleting categories.
1023 *** Sortable tabular summaries of categories and the item types they contain.
1025 *** Cross-category lists of items filtered by specific criteria.
1027 *** More fine-grained interaction with the Emacs diary, by being able to
1028 decide for each todo item whether it appears in the Fancy Diary display.
1030 *** Highly flexible new item insertion and item editing.
1032 *** Moving items between categories, storing done items in their category
1033 or in archive files, undoing or unarchiving done items.
1035 *** Reprioritizing items by inputting a numerical priority.
1037 *** Extensive customizability of operation and display, including many faces.
1042 *** `trace-function' and `trace-function-background' no longer prompt for
1043 the output buffer. Unless you use a prefix argument, they output to
1047 *** With a prefix argument, `trace-function' and `trace-function-background'
1048 will prompt for a "context". This is a Lisp expression, whose value at the
1049 time the function is entered/exited is printed along with the function's
1055 *** The experimental url syntax for remote file names has been removed.
1058 *** New connection method "adb", which allows to access Android
1059 devices by the Android Debug Bridge. The variable `tramp-adb-program'
1060 can be used to adapt the path of the "adb" program, if needed.
1063 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1064 "scpc" and "rsyncc" are discontinued. The ssh option
1065 "ControlMaster=auto" is set automatically in all ssh-based methods,
1066 when possible. See `tramp-use-ssh-controlmaster-options'.
1069 *** Handlers for `file-acl' and `set-file-acl' for remote machines
1070 which support POSIX ACLs.
1073 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1074 for remote machines which support filesystem notifications.
1077 ** New URL command `url-cookie-list' displays the current cookies,
1078 and allows you to interactively remove cookies.
1080 ** VC and related modes
1083 *** In VC directory mode, `D' displays diffs between VC-controlled
1084 whole tree revisions.
1087 *** In VC directory mode, `L' lists the change log for the current VC
1088 controlled tree in a window.
1091 *** In VC directory mode, `I' shows a log of changes that will be
1092 received with a pull operation.
1095 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1096 under current version control system. When called with a prefix
1097 argument, you can remove a file from the ignored file list.
1102 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1105 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1108 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1109 are obsolete. Customize the `woman-*' faces instead.
1111 ** Obsolete packages
1114 *** iswitchb.el; use icomplete-mode.
1117 *** longlines.el; use visual-line-mode.
1126 *** terminal.el; use term.el instead.
1129 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1132 *** xesam.el (owing to the cancellation of the XESAM project).
1135 *** yow.el; use fortune.el or cookie1.el instead.
1138 * New Modes and Packages in Emacs 24.4
1141 ** New package `eww' is a built-in web browser.
1142 It is only available if Emacs is compiled with libxml2 support.
1145 ** New minor mode `superword-mode'.
1146 This overrides the default word motion commands to treat "symbol_words"
1147 as a single word, similar to what `subword-mode' does.
1150 ** New package nadvice.el offers lighter-weight advice facilities.
1153 *** add-function/remove-function, which can be used to add/remove code on any
1154 function-carrying place, such as process-filters or `<foo>-function' hooks.
1156 *** advice-add/advice-remove to add/remove a piece of advice on a named
1157 function, much like `defadvice' does.
1159 ** New package frameset.el.
1160 It provides a set of operations to save a frameset (the state of all
1161 or a subset of the existing frames and windows, somewhat similar to a
1162 frame configuration), both in-session and persistently, and restore it
1163 at some point in the future.
1166 ** New package filenotify.el provides an interface for file system
1167 notifications. It requires that Emacs be compiled with one of the
1168 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1171 * Incompatible Lisp Changes in Emacs 24.4
1174 ** `kill-region' has lost its `yank-handler' optional argument.
1177 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1178 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1181 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1184 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1185 Some languages match those as »...«, and others as «...», so it is
1186 better for Emacs to stay neutral by default.
1189 ** In compiled Lisp files, the header no longer includes a timestamp.
1192 ** The default file coding for Emacs Lisp files is now utf-8.
1193 (See `file-coding-system-alist'.) In most cases, this change is
1194 transparent, but files that contain unusual characters without
1195 specifying an explicit coding system may fail to load with obscure
1196 errors. You should either convert them to utf-8 or add an explicit
1200 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1201 It used to disable the minor mode, major mode, and text-property keymaps,
1202 whereas now it simply has higher precedence.
1205 ** Default process filters and sentinels are not nil any more.
1206 Instead they default to a function that does what the nil value used to do.
1209 ** `read-event' does not return decoded chars in ttys any more.
1210 As was the case in Emacs 22 and before, the decoding of terminal
1211 input, according to `keyboard-coding-system', is not performed in
1212 `read-event' any more. But unlike in Emacs 22, this decoding is still
1213 done before input-decode-map, function-key-map, etc.
1216 ** The option `inhibit-local-menu-bar-menus' has been removed.
1219 ** Frame-local variables that affect redisplay do not work any more.
1220 More specifically, redisplay does not bother to check for a frame-local
1221 value when looking up variables.
1224 ** nil and "unbound" are indistinguishable in `symbol-function'.
1225 `symbol-function' does not signal a `void-function' error any more.
1226 To determine if a symbol's function definition is void, use `fboundp'.
1229 ** `defadvice' does not honor the `freeze' flag and cannot advise
1230 special-forms any more.
1233 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1234 when lexical binding is enabled. Previously, VAR was bound to nil,
1235 which often led to spurious unused-variable warnings.
1238 ** The return value of `backup-buffer' has changed.
1239 The second argument is no longer an SELinux context, instead it is an
1240 alist of extended attributes as returned by the new function
1241 `file-extended-attributes'. The attributes can be applied to another
1242 file using `set-file-extended-attributes'.
1245 ** By default `copy-file' no longer copies file permission bits to an
1246 existing destination; and it sets the file permission bits of a newly
1247 created destination to those of the source, masked by the default file
1248 permissions. To copy the file permission bits, pass t as the
1249 PRESERVE-PERMISSIONS argument of `copy-file'.
1252 ** `visited-file-modtime' now returns -1 for nonexistent files.
1253 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1254 in the presence of files with negative time stamps.
1257 ** The cars of the elements in `interpreter-mode-alist' are now
1258 treated as regexps rather than literal strings.
1261 * Lisp Changes in Emacs 24.4
1264 ** The second argument of `eval' can now specify a lexical environment.
1267 ** New functions `special-form-p' and `macrop'.
1270 ** New macro `define-alternatives' can be used to define generic commands.
1271 Generic commands are interactive functions whose implementation can be
1272 selected among several alternatives, as a matter of user preference.
1275 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1276 on that symbol will use the associated value as a function to call
1280 ** New variable `enable-dir-local-variables'.
1281 Directory-local variables are ignored if this is nil. This may be
1282 useful for modes that want to ignore directory-locals while still
1283 respecting file-local variables.
1286 ** New function `get-pos-property'.
1289 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1290 as a function to call to provide default values.
1292 ** Completion changes
1295 *** The separator used by `completing-read-multiple' is now a regexp.
1296 The default `crm-separator' has been changed to allow surrounding spaces
1300 *** The `common-substring' argument of `display-completion-list',
1301 which has been documented as obsolete since Emacs 23.1, is now _really_
1302 obsolete, and no longer advertised. Instead either call
1303 `completion-hilit-commonality' to add the highlighting; or use
1304 `completion-all-completions', which returns highlighted strings.
1307 *** New function `completion-table-with-cache' is a wrapper for
1308 `completion-table-dynamic' that caches the result of the last lookup.
1311 *** New function `completion-table-merge' to combine several
1312 completion tables by merging their completions.
1315 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1316 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1317 this replaces the string "lambda" with the Greek lambda character.
1322 *** Functions to pop up menus and dialogs now work on all terminals,
1323 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1324 `message-box', `yes-or-no-p', etc.
1326 The function `display-popup-menus-p' will now return non-nil for a
1327 display or frame whenever a mouse is supported on that display or
1331 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1334 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1335 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1338 ** New hook `pre-redisplay-function'.
1341 ** New bool-vector set operation functions
1342 *** `bool-vector-exclusive-or'
1343 *** `bool-vector-union'
1344 *** `bool-vector-intersection'
1345 *** `bool-vector-set-difference'
1346 *** `bool-vector-not'
1347 *** `bool-vector-subsetp'
1348 *** `bool-vector-count-consecutive'
1349 *** `bool-vector-count-population'
1352 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1354 ** Error-handling changes
1357 *** New function `define-error'.
1360 *** `with-demoted-errors' takes an additional argument `format'.
1363 ** New macro `with-eval-after-load'.
1364 This is like the old `eval-after-load', but better behaved.
1367 ** New library subr-x.el with miscellaneous small utility functions
1368 *** `hash-table-keys'
1369 *** `hash-table-values'
1370 *** `string-blank-p'
1371 *** `string-empty-p'
1373 *** `string-reverse'
1374 *** `string-trim-left'
1375 *** `string-trim-right'
1377 *** `string-remove-prefix'
1378 *** `string-remove-suffix'
1381 ** Obsoleted functions
1384 *** `lisp-complete-symbol'
1385 *** `field-complete'
1386 *** `minibuffer-completion-contents'
1387 *** `isearch-nonincremental-exit-minibuffer'
1388 *** `isearch-filter-visible'
1389 *** `generic-make-keywords-list'
1390 *** `get-upcase-table' (use `case-table-get-table' instead).
1393 ** `with-wrapper-hook' is obsoleted by `add-function'.
1394 The few hooks that used with-wrapper-hook are replaced as follows:
1395 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1396 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1397 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1400 ** `byte-compile-interactive-only-functions' is now obsolete.
1401 To specify that a command should only be called interactively, give it
1402 a non-nil `interactive-only' property.
1405 ** `split-string' now takes an optional argument TRIM.
1406 The value, if non-nil, is a regexp that specifies what to trim from
1407 the start and end of each substring.
1410 ** New function `string-suffix-p'.
1412 ** File-handling changes
1415 *** Support for filesystem notifications.
1416 Emacs now supports notifications of filesystem changes, such as
1417 creation, modification, and deletion of files. This requires the
1418 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1419 MS-Windows systems, this is supported for Windows XP and newer
1423 *** The 9th element returned by `file-attributes' is now unspecified.
1424 Formerly, it was t if the file's gid would change if file were deleted
1425 and recreated. This value has been inaccurate for years on many
1426 platforms, and nobody seems to have noticed or cared.
1429 *** The 6th argument to `copy-file' has been renamed to
1430 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1431 Unix file permission bits as well as SELinux context.
1434 *** The function `file-ownership-preserved-p' now has an optional
1435 argument GROUP which causes it check for file group too. This can be
1436 used in place of the 9th element of `file-attributes'.
1439 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1440 argument, with the same interpretation as the returned value of
1441 `visited-file-modtime'.
1443 ** Autorevert changes
1446 *** If Emacs is compiled with file notification support, notifications
1447 are used instead of checking the time stamp of the files. You can
1448 disable this by setting the user option `auto-revert-use-notify' to
1449 nil. Alternatively, a regular expression of directories to be
1450 excluded from file notifications can be specified by
1451 `auto-revert-notify-exclude-dir-regexp'.
1454 *** The new user option `auto-revert-remote-files' enables reversion
1455 of remote files when set to non-nil.
1460 *** The function `face-spec-set' is now like `setq' for face specs.
1461 Its third arg now accepts values specifying a face spec type (defface,
1462 custom, or override spec), and the relevant spec is set accordingly.
1465 *** New function `add-face-text-property', which can be used to
1466 conveniently prepend/append new face properties.
1469 *** Face specs set via Custom themes now replace the `defface' spec
1470 rather than inheriting from it. In other words, setting a face via a
1471 theme now behaves like setting it via Customize: you only need to
1472 specify the attributes that you want, you don't need to unset those
1473 that you don't want.
1476 *** New face characteristic (supports :underline (:style wave))
1477 specifies whether or not the terminal can display a wavy line.
1480 *** New face spec attribute :distant-foreground
1481 specifies foreground to use if background color is near the foreground
1482 color that would otherwise have been used.
1487 *** `image-animated-p' is now `image-multi-frame-p'.
1488 It returns non-nil for any image that contains multiple frames,
1489 whether or not it specifies a frame delay.
1492 *** New variable `image-default-frame-delay' gives the frame delay for
1493 animated images which do not specify a frame delay.
1496 *** New functions `image-current-frame' and `image-show-frame' for getting
1497 and setting the current frame of a multi-frame image.
1502 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1503 **** object-name -> eieio-object-name
1504 **** object-class -> eieio-object-class
1505 **** object-class-fast -> eieio--object-class
1506 **** object-class-name -> eieio-object-class-name
1507 **** object-name-string -> eieio-object-name-string
1508 **** object-num-slots -> eieio--object-num-slots
1509 **** object-set-name-string -> eieio-object-set-name-string
1510 **** class-of -> eieio-object-class
1511 **** class-name -> eieio-class-name
1512 **** class-parent -> eieio-class-parent
1513 **** class-parents -> eieio-class-parents
1514 **** class-parents-fast -> eieio-class-parents-fast
1515 **** class-children -> eieio-class-children
1516 **** class-num-slots -> eieio--class-num-slots
1517 **** class-precedence-list -> eieio-class-precedence-list
1518 **** class-direct-subclasses -> eieio-class-children
1519 **** class-direct-superclasses -> eieio-class-parents
1521 ** Changes in encoding and decoding of text
1524 *** New coding-system `prefer-utf-8'.
1525 This is like `undecided' but prefers UTF-8 on decoding if the text to
1526 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1527 any non-ASCII characters are automatically encoded as UTF-8.
1530 *** New attributes of coding-systems whose type is `undecided'.
1531 Two new attributes, `:inhibit-null-byte-detection' and
1532 `:inhibit-iso-escape-detection', determine how to detect encoding of
1533 text that includes null bytes and ISO-2022 escape sequences,
1534 respectively. Each of these attributes can be either nil, zero, or
1535 t. If it is t, decoding text ignores null bytes and, respectively,
1536 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1537 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1538 text is encoded in one of the ISO-2022 encodings, such as
1539 iso-2022-7bit. If the value is zero, Emacs consults the variables
1540 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1542 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1543 UTF-8 encoding and decoding, whenever possible.
1545 These attributes are only meaningful for coding-systems of type
1546 `undecided'. (The type of a coding-system is determined by its
1547 `:coding-type' attribute and can be accessed by calling the
1548 `coding-system-type' function.)
1551 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1554 ** New functions `group-gid' and `group-real-gid'.
1557 ** The spelling of the rx.el category `chinese-two-byte' has been
1558 corrected (the first 'e' was missing).
1561 ** Minor internal changes to the details of lock files.
1562 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1563 If DIR/.#FILE already exists and is not an Emacs lock file,
1564 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1565 numbered lock files DIR/.#FILE.0...).
1566 On file systems that do not support symbolic links, the lock is now a
1567 regular file with contents being what would have been in the symlink.
1569 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1572 *** The package descriptor and name of global variables, constants,
1573 and functions should be separated by two hyphens if the symbol is not
1574 meant to be used by other packages.
1577 * Changes in Emacs 24.4 on Non-Free Operating Systems
1580 ** The procedure for building Emacs on MS-Windows has changed.
1581 It is now built by running the same configure script as on all other
1582 platforms. This requires the MSYS environment and MinGW development
1583 tools. See the updated instructions in nt/INSTALL for details.
1585 Using the Posix configure script and Makefile's also means a change in
1586 the directory structure of the Emacs installation on Windows. It is
1587 now the same as on GNU and Unix systems. In particular, the auxiliary
1588 programs, such as cmdproxy.exe and hexl.exe, are in
1589 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1590 version), version-independent site-lisp is in share/emacs/site-lisp,
1591 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1592 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1593 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1594 directories and will find the files in there automatically; there's no
1595 need to set any variables due to this change.)
1598 ** Emacs on Windows 2000 and later can now access files and directories
1599 whose names cannot be encoded in the current system codepage.
1601 The new variable `w32-unicode-filenames' controls this feature: if it
1602 is t, Emacs uses Unicode APIs to pass file names to system calls,
1603 which lifts the limitation of file names to the current locale.
1606 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1607 The backtrace is written to the 'emacs_backtrace.txt' file in the
1608 directory where Emacs was running.
1611 ** The variable `buffer-file-type' is no longer supported.
1612 Setting it has no effect, and %t in the mode-line format is ignored.
1613 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1614 modifying it has no effect.
1617 ** Lock files now work on MS-Windows.
1618 This helps to prevent losing your edits if the same file is being
1619 edited in another Emacs session or by another user. See the node
1620 "Interlocking" in the Emacs User Manual for the details. To disable
1621 file locking, customize `create-lockfiles' to nil.
1623 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1624 GNUstep and Mac OS X 10.4 use the old font backend.
1625 To use the old backend by default, do on the command line:
1626 % defaults write org.gnu.Emacs FontBackend ns
1628 ** Improved fullscreen support on Mac OS X.
1629 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1630 Customize `ns-use-native-fullscreen' to change the style.
1631 For Mac OS X 10.7 and newer, native is the default.
1633 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1634 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1635 does not apply to images.
1638 * Installation Changes in Emacs 24.3
1640 ** The default X toolkit is now Gtk+ version 3.
1641 If you don't pass `--with-x-toolkit' to configure, or if you use
1642 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1643 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1644 You can explicitly require a specific version by passing
1645 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1647 ** New configure option `--enable-link-time-optimization', to utilize
1648 an appropriate feature provided by GCC since version 4.5.0.
1650 ** New configure option `--without-all' to disable most of the optional
1651 features (image support, etc.) that are normally enabled by default.
1653 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1654 Emacs). If building with GCC, this enables compile-time checks that
1655 warn/give errors about possibly-questionable C code. On a recent GNU
1656 system there should be no warnings; on older and on non-GNU systems
1657 the results may be useful to developers.
1659 ** The configure option `--enable-use-lisp-union-type' has been
1660 renamed to `--enable-check-lisp-object-type', as the resulting
1661 Lisp_Object type no longer uses a union to implement the compile time
1662 check that this option enables.
1664 ** The configure option `--disable-maintainer-mode' has been removed,
1665 as it was confusingly-named and rarely useful.
1667 ** The configure options `--program-prefix', `--program-suffix', and
1668 `--program-transform-name' apply to more than just the installed
1669 binaries. Now they also affect the man pages, icons, and the
1670 etc/emacs.desktop file; but not the info pages, since this would break
1671 links between the various manuals.
1673 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1674 overwriting "emacs" in the installation bin/ directory with a link
1677 ** Emacs uses libtinfo in preference to libncurses, if available.
1679 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1680 /usr/pkg/lib to the linker search path. You must add them yourself if
1683 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1684 (from the bin and libexec directories, respectively). The former is
1685 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1688 * Startup Changes in Emacs 24.3
1690 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1691 lisp/ directory. There should not be any there anyway. If you have
1692 been adding them there, put them somewhere else; e.g., site-lisp.
1694 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1697 * Changes in Emacs 24.3
1701 *** `C-h f' (`describe-function') can now perform autoloading.
1702 When this command is called for an autoloaded function whose docstring
1703 contains a key substitution construct, that function's library is
1704 automatically loaded, so that the documentation can be shown
1705 correctly. To disable this, set `help-enable-auto-load' to nil.
1707 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1708 even after their associated libraries have been loaded (and the
1709 autoloads have been redefined as functions).
1713 *** Images displayed via ImageMagick now support transparency and the
1714 :background image specification property.
1716 *** When available, ImageMagick support is automatically enabled.
1717 It is no longer necessary to call `imagemagick-register-types'
1718 explicitly to install ImageMagick image types; that function is called
1719 automatically at startup, or when customizing an imagemagick- option.
1721 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1722 ImageMagick to view images. (You must call `imagemagick-register-types'
1723 afterwards if you do not use customize to change this.)
1725 *** The new variable `imagemagick-enabled-types' also affects which
1726 ImageMagick types are treated as images. The function
1727 `imagemagick-filter-types' returns the list of types that will be
1732 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1733 next and previous path separator, respectively.
1735 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1736 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1737 non-nil before enabling the mode.
1741 *** New option `mode-line-default-help-echo' specifies the help text
1742 (shown in a tooltip or in the echo area) for any part of the mode line
1743 that does not have its own specialized help text.
1745 *** You can now click mouse-3 in the coding system indicator to invoke
1746 `set-buffer-file-coding-system'.
1748 ** Server and client
1750 *** emacsclient now obeys string values for `initial-buffer-choice',
1751 if it is told to open a new frame without specifying any file to visit
1752 or expression to evaluate.
1754 *** New option `server-auth-key' specifies a shared server key.
1756 ** Emacs now generates backtraces on fatal errors.
1757 On encountering a fatal error, Emacs now outputs a textual description
1758 of the fatal signal, and a short backtrace on platforms like glibc
1759 that support backtraces.
1761 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1762 This minor mode replaces `toggle-read-only', which is now obsolete.
1764 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1765 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1766 respectively, without exiting from the prompt.
1768 ** In the Package Menu, newly-available packages are listed as "new",
1769 and sorted above the other "available" packages by default.
1771 ** If your Emacs was built from a repository checkout, the new variable
1772 `emacs-bzr-version' contains information about the bzr revision used.
1774 ** New option `create-lockfiles' specifies usage of lockfiles.
1775 It defaults to t. Changing it to nil inhibits the creation of lock
1776 files (use this with caution).
1778 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1779 variables on remote hosts.
1781 ** The entry for PCL-CVS has been removed from the Tools menu.
1782 The PCL-CVS commands are still available via the keyboard.
1784 ** Using "unibyte: t" in Lisp source files is obsolete.
1785 Use "coding: raw-text" instead.
1787 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1788 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1789 The previous binding, introduced in Emacs 24.1, was a mistake, because
1790 `C-c LETTER' bindings are reserved for user customizations.
1792 ** Internationalization
1794 *** New language environment: Persian.
1796 *** New input method `vietnamese-vni'.
1798 ** Nextstep (GNUstep / Mac OS X) port
1800 *** Support for fullscreen and the frame parameter fullscreen.
1802 *** A file dialog is used for open/save operations initiated from the
1806 * Editing Changes in Emacs 24.3
1808 ** Search and Replace
1810 *** Non-regexp Isearch now performs "lax" space matching.
1811 Each sequence of spaces in the supplied search string may match any
1812 sequence of one or more whitespace characters, as specified by the
1813 variable `search-whitespace-regexp'. (This variable is also used by a
1814 similar existing feature for regexp Isearch.)
1816 *** New Isearch command `M-s SPC' toggles lax space matching.
1817 This applies to both ordinary and regexp Isearch.
1819 *** New option `replace-lax-whitespace'.
1820 If non-nil, `query-replace' uses flexible whitespace matching too.
1823 *** Global `M-s _' starts a symbol (identifier) incremental search,
1824 and `M-s _' in Isearch toggles symbol search mode.
1825 `M-s c' in Isearch toggles search case-sensitivity.
1827 ** Navigation commands
1829 *** New binding `M-g c' for `goto-char'.
1831 *** New binding `M-g TAB' for `move-to-column'.
1833 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1834 interactively with no prefix arg. Previously, it moved to column 1.
1836 ** New option `yank-handled-properties' allows processing of text
1837 properties on yanked text, in ways that are more general than just
1838 removing them (as is done by `yank-excluded-properties').
1840 ** New option `delete-trailing-lines' specifies whether
1841 M-x delete-trailing-whitespace should delete trailing lines at the end
1842 of the buffer. It defaults to t.
1844 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1846 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1847 `ucs-insert' is now an obsolete alias for `insert-char'.
1849 ** The `z' key no longer has a binding in most special modes.
1850 It used to be bound to `kill-this-buffer', but `z' is too easy to
1853 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1854 It copies the region-rectangle as the last rectangle kill.
1858 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1860 *** New option `register-separator' specifies the register containing
1861 the text to put between collected texts for use with
1862 M-x append-to-register and M-x prepend-to-register.
1865 * Changes in Specialized Modes and Packages in Emacs 24.3
1867 ** Common Lisp emulation (CL)
1869 *** CL's main entry is now (require 'cl-lib).
1870 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1871 i.e., all its definitions have the "cl-" prefix (and internal definitions
1872 use the "cl--" prefix).
1874 If `cl' provided a feature under the name `foo', then `cl-lib'
1875 provides it under the name `cl-foo' instead; with the exceptions of the
1876 few `cl' definitions that had to use `foo*' to avoid conflicts with
1877 pre-existing Elisp entities. These have been renamed to `cl-foo'
1878 rather than `cl-foo*'.
1880 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1881 provide the old, non-prefixed names. Some exceptions are listed below:
1883 *** `cl-flet' is not like `flet' (which is deprecated).
1884 Instead it obeys the behavior of Common-Lisp's `flet'.
1885 In particular, in cl-flet function definitions are lexically scoped,
1886 whereas in flet the scoping is dynamic.
1888 *** `cl-labels' is slightly different from `labels'.
1889 The difference is that it relies on the `lexical-binding' machinery
1890 (as opposed to the `lexical-let' machinery used previously) to capture
1891 definitions in closures, so such closures will only work if `lexical-binding'
1894 *** `cl-letf' is not exactly like `letf'.
1895 The only difference is in details that relate to some deprecated usage
1896 of `symbol-function' in place forms.
1898 *** `progv' was rewritten to use the `let' machinery.
1899 A side effect is that variables without corresponding values are bound
1900 to nil rather than being made unbound.
1902 *** The following methods of extending `setf' are obsolete
1903 (use features from gv.el instead):
1904 `define-modify-macro' (use `gv-letplace')
1905 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1906 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1907 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1911 *** Changes are now highlighted using the same color scheme as in
1912 modern VCSes. Deletions are displayed in red (new faces
1913 `diff-refine-removed' and `smerge-refined-removed', and new definition
1914 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1915 and `smerge-refined-added', and new definition of `diff-added').
1917 *** The variable `diff-use-changed-face' defines whether to use the
1918 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1919 changes in context diffs.
1921 *** The new command `diff-delete-trailing-whitespace' removes trailing
1922 whitespace introduced by a diff.
1924 ** Ediff now uses the same color scheme as Diff mode.
1928 A new version of python.el, which provides several new features, including:
1929 per-buffer shells, better indentation, Python 3 support, and improved
1930 shell-interaction compatible with iPython (and virtually any other
1933 *** Some user options have been replaced/renamed, including (old -> new):
1934 **** python-indent -> python-indent-offset
1935 **** python-guess-indent -> python-indent-guess-indent-offset
1936 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1937 **** python-use-skeletons -> python-skeleton-autoinsert
1939 *** Some user options have been removed, including:
1941 **** `python-indent-string-contents': Strings are never indented.
1943 **** `python-honour-comment-indentation':
1944 Comments are always considered as indentation markers.
1946 **** `python-continuation-offset': Indentation is automatically
1947 calculated in a pep8 compliant way depending on the context.
1949 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1950 Have no direct mapping as the shell interaction is completely different.
1952 **** `python-python-command', `python-jython-command':
1953 Replaced by `python-shell-interpreter'.
1955 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1956 `python-pdbtrack-minor-mode-string', `python-source-modes':
1959 *** Some commands have been replaced (old -> new):
1960 **** python-insert-class -> python-skeleton-class
1961 **** python-insert-def -> python-skeleton-def
1962 **** python-insert-for -> python-skeleton-for
1963 **** python-insert-if -> python-skeleton-if
1964 **** python-insert-try/except -> python-skeleton-try
1965 **** python-insert-try/finally -> python-skeleton-try
1966 **** python-insert-while -> python-skeleton-while
1967 **** python-find-function -> python-nav-jump-to-defun
1968 **** python-next-statement -> python-nav-forward-sentence
1969 **** python-previous-statement -> python-nav-backward-sentence
1970 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1971 **** python-end-of-defun-function -> python-nav-end-of-defun
1972 **** python-send-buffer -> python-shell-send-buffer
1973 **** python-send-defun -> python-shell-send-defun
1974 **** python-send-region -> python-shell-send-region
1975 **** python-send-region-and-go -> emulate with python-shell-send-region
1976 and python-shell-switch-to-shell
1977 **** python-send-string -> python-shell-send-string
1978 **** python-switch-to-python -> python-shell-switch-to-shell
1979 **** python-describe-symbol -> python-eldoc-at-point
1983 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1985 *** The D-Bus object manager interface is implemented.
1987 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1988 if their value does not fit into Emacs's integer range.
1990 *** The function `dbus-call-method' is now non-blocking.
1991 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1993 *** Signals can also be sent as unicast messages.
1995 *** The argument list of `dbus-register-signal' has been extended,
1996 according to the new match rule types of D-Bus.
1998 *** `dbus-init-bus' supports private connections.
2000 *** There is a new function `dbus-setenv'.
2002 ** `desktop-path' no longer includes the "." directory.
2003 Desktop files are now located in ~/.emacs.d by default.
2007 *** `dired-do-async-shell-command' executes each file sequentially
2008 if the command ends in `;' (when operating on multiple files).
2009 Otherwise, it executes the command on each file in parallel.
2011 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
2012 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
2015 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
2016 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
2017 mark/unmark/flag all files in the active region.
2019 *** The minibuffer default for `=' (`dired-diff') has changed.
2020 It is now the backup file for the file at point, if one exists.
2021 In Transient Mark mode the default is the file at the active mark.
2023 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2024 The global binding for `M-=', `count-words-region' is in effect.
2028 *** New module "notifications", which can send a notification when you
2029 receive a private message or your nickname is mentioned.
2031 *** ERC will look up server/channel names via auth-source and use any
2034 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2035 only applies to messages sent by lurkers.
2037 ** reStructuredText mode
2039 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2040 fontification, comment handling, and customization have all been revised
2043 *** Support for `imenu' and `which-function-mode'.
2045 *** The reStructuredText syntax is more closely covered.
2046 Sphinx support has been improved.
2048 *** `rst-insert-list' inserts new list or continues existing lists.
2050 *** A negative prefix argument always works for `rst-adjust'.
2052 *** The window configuration is reset after displaying a TOC.
2054 *** The constant `rst-version' describes the rst.el package version.
2058 *** Support for percent literals and recognition of regular expressions
2059 in method calls without parentheses with more methods, including Cucumber
2062 *** Improved syntax highlighting and indentation.
2064 *** New command `ruby-toggle-block', bound to `C-c {'.
2066 *** Some non-standard keybindings/commands have been removed:
2068 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
2070 **** `ruby-mark-defun'; use `mark-defun'.
2072 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2073 appropriate settings for the variables `beginning-of-defun-function'
2074 and `end-of-defun-function'.
2076 **** Non-standard keybindings for `backward-kill-word', `comment-region',
2077 `reindent-then-newline-and-indent' and `newline' have been removed.
2079 ** Shell Script mode
2081 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2083 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2085 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2089 *** The free software compiler GHDL is supported (and now the default).
2091 *** Support for the VHDL-AMS packages has been added/updated.
2093 *** Updated to the 2002 revision of the VHDL standard.
2095 *** Accepts \r and \f as whitespace.
2099 *** The faces used by Apropos are now directly customizable.
2100 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2101 see the `apropos' Custom group for details.
2103 *** The old options whose values specified faces to use have been removed
2104 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2105 `apropos-match-face' and `apropos-property-face'.).
2109 *** This package has been rewritten to use Tabulated List mode.
2111 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2112 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2116 *** Algebraic simplification mode is now the default.
2117 To restrict to the limited simplifications given by the former
2118 default simplification mode, use `m I'.
2122 *** You can customize the header text that appears above each calendar month.
2123 See the variable `calendar-month-header'.
2125 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2127 *** The calendars produced by cal-html include holidays.
2128 Customize `cal-html-holidays' to change this.
2132 *** The major modes from the parser generators "Bovine" and "Wisent"
2133 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2134 are in `auto-mode-alist', and the corresponding manuals are included.
2138 **** Menu support for the "Configuration" feature. This allows users to
2139 choose the active configuration (such as debug or install) from the menu.
2141 **** New command `ede-set' to interactively set project-local variables.
2143 **** Support for compiling, debugging, and running in "generic" projects.
2145 **** Autoconf editing support for M4 macros with complex arguments.
2147 **** Compilation support for the "linux" project type.
2149 **** "simple" projects have been removed; use "generic" projects instead.
2153 **** Support for parsing #include statements inside a namespace in C/C++.
2155 **** Improved support for 'extern "C"' declarations in C/C++.
2157 **** The ability to ignore more common special C/C++ preprocessor symbols,
2158 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2159 If available, include cdefs.h as an additional source of preprocessor symbols.
2161 **** Improved C/C++ function pointer parsing.
2163 **** In Python, support for converting imports to include file names.
2165 **** Ability to dynamically determine the Python load path.
2167 **** Support for the Python 'WITH' and 'AT' keywords.
2169 **** Improved tooltip completion.
2173 **** The SRecode manual is now included.
2175 **** Tag generation supports constructor/destructor settings and system
2176 include differentiation.
2178 **** Addition of 'Framework' support: Frameworks are specified when a
2179 particular kind of library (such as Android) is needed in a common language
2182 **** Support for nested templates and let variables override based on priority.
2184 **** Support for merging tables from multiple related modes, such as
2185 default -> c++ -> arduino.
2187 ** Compile has a new option `compilation-always-kill'.
2191 *** `custom-reset-button-menu' now defaults to t.
2193 *** Non-option variables are never matched in `customize-apropos' and
2194 `customize-apropos-options' (i.e., the prefix argument does nothing for
2195 these commands now).
2199 *** The variables `term-default-fg-color' and `term-default-bg-color'
2200 are now deprecated in favor of the customizable face `term'.
2202 *** You can customize how to display ANSI terminal colors and styles
2203 by customizing the corresponding `term-color-<COLOR>',
2204 `term-color-underline' and `term-color-bold' faces.
2208 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2210 *** Remote processes are now also supported on remote MS-Windows hosts.
2214 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2215 Previously, this slot stored semicolon-separated attribute-value pairs
2216 appended to some imap URLs, but this is not compatible with RFC 3986.
2217 So now the `filename' slot stores the entire path and query components,
2218 and the `attributes' slot is always nil.
2220 *** New function `url-encode-url' for encoding a URI string.
2221 The `url-retrieve' function now uses this to encode its URL argument,
2222 in case that is not properly encoded.
2224 ** notifications.el supports now version 1.2 of the Notifications API.
2225 The function `notifications-get-capabilities' returns the supported
2228 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2229 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2230 `flymake-warning-bitmap'.
2232 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2233 specifying URL types that should be converted to remote file names at
2234 the FFAP prompt. The default is now '("ftp").
2236 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2237 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2239 ** New option `mouse-avoidance-banish-position' specifies where the
2240 `banish' mouse avoidance setting moves the mouse.
2242 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2243 closing brackets to be aligned with the line of the opening bracket.
2245 ** In Proced mode, new command `proced-renice' renices marked processes.
2247 ** New option `async-shell-command-buffer' specifies the buffer to use
2248 for a new asynchronous `shell-command' when the default output buffer
2249 `*Async Shell Command*' is already in use.
2251 ** SQL mode has a new option `sql-db2-escape-newlines'.
2252 If non-nil, newlines sent to the command interpreter will be escaped
2253 by a backslash. The default does not escape the newlines and assumes
2254 that the sql statement will be terminated by a semicolon.
2256 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2257 (and modes that derive from it), sorts the column at point, or the Nth
2258 column if a numeric prefix argument is given.
2260 ** `which-func-modes' now defaults to t, so Which Function mode, when
2261 enabled, applies to all applicable major modes.
2263 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2266 ** Follow mode no longer works by using advice.
2267 The option `follow-intercept-processes' has been removed.
2269 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2271 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2272 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2273 *** semantic-change-hooks -> semantic-change-functions
2274 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2275 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2276 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2277 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2278 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2279 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2280 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2281 *** rcirc-activity-hooks -> rcirc-activity-functions
2282 *** rcirc-print-hooks -> rcirc-print-functions
2283 *** dbus-event-error-hooks -> dbus-event-error-functions
2284 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2285 *** checkdoc-style-hooks -> checkdoc-style-functions
2286 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2287 *** archive-extract-hooks -> archive-extract-hook
2288 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2289 *** hfy-post-html-hooks -> hfy-post-html-hook
2290 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2291 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2292 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2293 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2295 ** Obsolete packages
2298 In most cases, assoc+member+push+delq work just as well.
2299 And in any case it's just a terrible package: ugly semantics, terrible
2300 inefficiency, and not namespace-clean.
2309 * Incompatible Lisp Changes in Emacs 24.3
2311 ** Docstrings starting with `*' no longer indicate user options.
2312 Only variables defined using `defcustom' are considered user options.
2313 The function `user-variable-p' is now an obsolete alias for
2314 `custom-variable-p'.
2316 ** The return values of `defalias', `defun' and `defmacro' have changed,
2317 and are now undefined. For backwards compatibility, `defun' and
2318 `defmacro' currently return the name of the newly defined
2319 function/macro, but this should not be relied upon.
2321 ** `random' by default now returns a different random sequence in
2322 every Emacs run. Use `(random S)', where S is a string, to set the
2323 random seed to a value based on S, in order to get a repeatable
2324 sequence in later calls.
2326 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2327 that substring is inserted literally even if the LITERAL arg is
2328 non-nil, instead of causing an error to be signaled.
2330 ** `select-window' now always makes the window's buffer current.
2331 It does so even if the window was selected before.
2333 ** The function `x-select-font' can return a font spec, instead of a
2334 font name as a string. Whether it returns a font spec or a font name
2335 depends on the graphical library.
2337 ** `face-spec-set' no longer sets frame-specific attributes when the
2338 third argument is a frame (that usage was obsolete since Emacs 22.2).
2340 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2342 ** The CL package's `get-setf-method' function no longer exists.
2343 Generalized variables are now part of core Emacs Lisp, and implemented
2344 differently to the way cl.el used to do it. It is not possible to
2345 define a compatible replacement for `get-setf-method'. See the file
2346 gv.el for internal details of the new implementation.
2348 ** The arguments of `dbus-register-signal' are no longer just strings,
2349 but keywords or keyword-string pairs. The old argument list will
2350 still be supported for Emacs 24.x.
2352 ** Miscellaneous name changes
2353 Some Lisp symbols have been renamed to correct their spelling,
2354 or to be more consistent with standard Emacs terminology.
2356 *** Renamed functions
2357 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2358 **** inactivate-input-method -> deactivate-input-method
2359 **** quail-inactivate -> quail-deactivate
2360 **** robin-inactivate -> robin-deactivate
2361 **** viper-inactivate-input-method -> viper-deactivate-input-method
2362 **** viper-inactivate-input-method-action ->
2363 viper-deactivate-input-method-action
2364 **** ucs-input-inactivate -> ucs-input-deactivate
2367 The old hooks are still supported for backward compatibility, but they
2368 are deprecated and will be removed eventually.
2369 **** input-method-inactivate-hook -> input-method-deactivate-hook
2370 **** robin-inactivate-hook -> robin-deactivate-hook
2371 **** quail-inactivate-hook -> quail-deactivate-hook
2373 *** Renamed variables
2374 **** follow-deactive-menu -> follow-inactive-menu
2375 **** inactivate-current-input-method-function ->
2376 deactivate-current-input-method-function
2378 ** Some obsolete functions, variables, and faces have been removed:
2379 *** `last-input-char', `last-command-char', `unread-command-char'
2380 *** `facemenu-unlisted-faces'
2381 *** `rmail-decode-mime-charset'
2382 *** `iswitchb-read-buffer'
2383 *** `sc-version', `sc-submit-bug-report'
2384 *** `set-char-table-default'
2385 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2386 *** `compile-internal'
2388 *** `mode-line-inverse-video'
2389 *** `follow-mode-off-hook'
2390 *** `cvs-commit-buffer-require-final-newline'
2391 (use `log-edit-require-final-newline' instead)
2392 *** `cvs-changelog-full-paragraphs'
2393 (use `log-edit-changelog-full-paragraphs' instead)
2394 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2395 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2396 *** `vc-master-templates' (use `vc-handled-backends' instead)
2397 *** `vc-checkout-carefully'
2400 * Lisp Changes in Emacs 24.3
2402 ** CL-style generalized variables are now in core Elisp.
2403 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2404 You can define your own generalized variables using `gv-define-simple-setter',
2405 `gv-define-setter', etc.
2407 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2408 This can significantly speed up execution of non-byte-compiled code,
2409 but can also bump into previously unnoticed cyclic dependencies.
2410 These are generally harmless: they will simply cause the macro calls
2411 to be left for later expansion (as before), but will result in a
2412 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2413 You may wish to restructure your code so this does not happen.
2415 ** New sampling-based Elisp profiler.
2416 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2417 When finished, use M-x profiler-stop. The sampling rate can be based on
2418 CPU time or memory allocations.
2420 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2421 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2423 ** New macros `setq-local' and `defvar-local'.
2425 ** Face underlining can now use a wave.
2427 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2428 of `read-regexp' accepts a string ending with a colon and space, and its
2429 second argument DEFAULTS can be a list of strings accessible via `M-n'
2430 in the minibuffer ahead of other hard-coded useful regexp-related values.
2431 More commands use `read-regexp' now to read their regexp arguments.
2435 *** New function `completion-table-with-quoting' to handle completion
2436 in the presence of quoting, such as file completion in shell buffers.
2438 *** New function `completion-table-subvert' to use an existing completion
2439 table, but with a different prefix.
2443 *** New error type and new function `user-error'.
2444 These do not trigger the debugger.
2446 *** New option `debugger-bury-or-kill', saying what to do with the
2447 debugger buffer when exiting debug.
2449 *** Set `debug-on-message' to enter the debugger when a certain
2450 message is displayed in the echo area. This can be useful when trying
2451 to work out which code is doing something.
2453 *** New var `inhibit-debugger', automatically set to prevent accidental
2454 recursive invocations.
2458 *** New command `fit-frame-to-buffer' adjusts the frame height to
2461 *** The command `fit-window-to-buffer' can adjust the frame height
2462 if the new option `fit-frame-to-buffer' is non-nil.
2464 *** New macro `with-temp-buffer-window', similar to
2465 `with-output-to-temp-buffer'.
2467 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2470 *** New option `switch-to-buffer-preserve-window-point' to restore a
2471 window's point when switching buffers.
2473 *** New display action alist entries `window-height' and `window-width'
2474 specify the size of new windows created by `display-buffer'.
2476 *** New display action alist entry `pop-up-frame-parameters', if
2477 non-nil, specifies frame parameters to give any newly-created frame.
2479 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2480 tells display action functions to avoid changing which frame is
2483 *** New display action alist entry `previous-window', if non-nil,
2484 specifies window to reuse in `display-buffer-in-previous-window'.
2486 *** New display action functions `display-buffer-below-selected',
2487 and `display-buffer-in-previous-window'.
2489 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2490 now accept a third argument to avoid choosing the selected window.
2492 *** Additional values recognized for option `window-combination-limit'.
2494 *** The following variables are obsolete, as they can be replaced by
2495 appropriate entries in the `display-buffer-alist' function introduced
2497 **** `dired-shrink-to-fit'
2498 **** `display-buffer-reuse-frames'
2499 **** `display-buffer-function'
2500 **** `special-display-buffer-names'
2501 **** `special-display-frame-alist'
2502 **** `special-display-function'
2503 **** `special-display-regexps'
2507 *** `current-time-string' no longer requires that its argument's year
2508 must be in the range 1000..9999. It now works with any year supported
2509 by the underlying C implementation.
2511 *** `current-time' now returns extended-format time stamps
2512 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2513 PSEC is typically a multiple of 1000 on current machines. Other
2514 functions that use this format, such as `file-attributes' and
2515 `format-time-string', have been changed accordingly. Old-format time
2516 stamps are still accepted.
2518 *** The format of timers in `timer-list' and `timer-idle-list' is now
2519 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2520 The PSECS slot is new, and uses picosecond resolution. It can be
2521 accessed via the new `timer--psecs' accessor.
2523 *** Last-modified time stamps in undo lists now are of the form
2524 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2528 *** Improved security when handling persistent objects:
2530 **** `eieio-persistent-read' now features optional arguments for specifying
2531 the class to load, as well as a flag stating whether subclasses are allowed;
2532 if provided, other classes will be rejected by the reader. For
2533 compatibility with existing code, if the class is omitted only a
2536 **** New specialized reader for pulling in classes and signaling errors
2537 without evaluation of suspicious code.
2539 **** All slots that contain objects must have a :type. Slots with lists
2540 of objects must use a new type predicate for a list of an object type.
2542 *** Support for `find-function' and similar utilities, through the addition
2543 of filename support to generated symbols.
2545 ** Floating point functions now always return special values like NaN,
2546 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2547 Previously, they returned NaNs on some platforms but signaled errors
2548 on others. The affected functions are acos, asin, tan, exp, expt,
2549 log, log10, sqrt, and mod.
2551 ** New fringe bitmap `exclamation-mark'.
2553 ** Miscellaneous changes to special forms and macros
2555 *** `defun' and `defmacro' are now macros rather than special forms.
2557 *** `kbd' is now a function rather than a macro.
2559 ** Miscellaneous new functions
2561 *** `set-temporary-overlay-map' sets up a temporary keymap that
2562 takes precedence over most other maps for a short while (normally one key).
2564 *** `autoloadp' tests if its argument is an autoloaded object.
2566 *** `autoload-do-load' performs the autoloading operation.
2568 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2570 *** `file-name-base' returns a file name sans directory and extension.
2572 *** `function-get' fetches a function property, following aliases.
2574 *** `posnp' tests if an object is a `posn'.
2576 *** `system-users' returns the user names on the system.
2578 *** `system-groups' returns the group names on the system.
2580 *** `tty-top-frame' returns the topmost frame of a text terminal.
2582 ** The following functions and variables are obsolete:
2583 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2584 *** `buffer-has-markers-at'
2585 *** `macro-declaration-function' (use `macro-declarations-alist')
2586 *** `window-system-version' (provides no useful information)
2587 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2588 *** `query-replace-interactive'
2589 *** `font-list-limit' (has had no effect since Emacs < 23)
2592 * Changes in Emacs 24.3 on Non-Free Operating Systems
2594 ** Cygwin builds can use the native MS Windows user interface.
2595 Pass `--with-w32' to configure. The default remains the X11 interface.
2597 ** Two new functions are available in Cygwin builds:
2598 `cygwin-convert-file-name-from-windows' and
2599 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2600 code to access the Cygwin file-name mapping machinery to convert
2601 between Cygwin and Windows-native file and directory names.
2603 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2604 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2605 `mouse-autoselect-window'.
2607 ** On MS Windows Vista and later Emacs now supports symbolic links.
2609 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2610 support for libxml2, even if its presence is detected.
2612 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2614 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2615 directories to the search path. You must add them yourself if you want them.
2618 * Changes in Emacs 24.2
2620 ** This is mainly a bug-fix release.
2623 * Installation Changes in Emacs 24.1
2625 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2626 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2627 also depend on Gtk+. You can disable them with --without-rsvg and
2630 ** Emacs can be compiled with GnuTLS support.
2631 This happens by default if a suitably recent version of the library is
2632 found at build time. To prevent this, use the configure option
2633 `--without-gnutls'. See below for GnuTLS features.
2635 ** Emacs can be compiled with SELinux support.
2636 This happens by default if a suitably recent version of the library is
2637 found at build time. To prevent this, use the configure option
2638 `--without-selinux'. See below for SELinux features.
2640 ** Emacs can be compiled with ImageMagick support.
2641 This happens by default if a suitably recent version of the library is
2642 found at build time. To prevent this, use the configure option
2643 `--without-imagemagick'. See below for ImageMagick features.
2644 This feature is not available for the Nextstep or MS ports.
2646 ** Emacs can be compiled with libxml2 support.
2647 This happens by default if a suitably recent version of the library is
2648 found at build time. To prevent this, use the configure option
2649 `--without-xml2'. See below for libxml2 features.
2651 ** By default, the installed Info and man pages are compressed.
2652 You can disable this by configuring --without-compress-info.
2654 ** New configure option --with-wide-int.
2655 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2656 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2659 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2660 These provide no new functionality, they just remove the need to edit
2661 lib-src/Makefile by hand in order to use the associated features.
2663 ** New configure option --enable-use-lisp-union-type.
2664 This is only useful for Emacs developers to debug certain types of bugs.
2665 This is not a new feature; only the configure flag is new.
2667 ** The standalone programs digest-doc and sorted-doc are removed.
2668 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2670 ** The standalone program `fakemail' is removed.
2671 If you need it, feedmail.el provides a superset of the functionality.
2674 * Startup Changes in Emacs 24.1
2676 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2677 command line arguments, and the EMACS_UNIBYTE environment variable, no
2678 longer have any effect. (They were declared obsolete in Emacs 23.)
2680 ** New command line option `--no-site-lisp' removes site-lisp directories
2681 from load-path. -Q now implies this. This option does not affect the
2682 EMACSLOADPATH environment variable (and hence has no effect for
2686 * Changes in Emacs 24.1
2690 *** Many packages now use the `completion-at-point' command,
2691 rather than implementing separate completion commands.
2693 *** `completion-at-point' now handles tags and semantic completion.
2695 *** Completion in a non-minibuffer now tries to detect the end of completion
2696 and pops down the *Completions* buffer accordingly.
2698 *** New option `completion-cycle-threshold' allows completion cycling.
2700 *** New option `completion-category-overrides' for overriding the
2701 default completion style in certain circumstances.
2703 *** New completion style `substring'.
2705 *** Completion of buffer names uses `substring' completion by default.
2707 *** The option `widget-complete-field' has been removed.
2711 *** The first time you try sending mail, Emacs asks for a mail method.
2712 This is implemented by a new default for `send-mail-function', which
2713 is `sendmail-query-once'. This offers to use the smtpmail package, or
2714 to use the old defaults relying on external mail facilities
2715 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2716 `mailclient-send-it' on Windows).
2718 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2719 transfers the report to your desktop's preferred mail client, if there
2720 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2723 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2724 and Mail mode changes
2726 ** Emacs server and client changes
2728 *** New option `server-port' specifies the port for TCP Emacs servers.
2730 *** New emacsclient argument -q/--quiet suppresses some status messages.
2732 *** New emacsclient argument --frame-parameters specifies the frame
2733 parameters of any newly-created graphical frame.
2735 *** If emacsclient shuts down due to Emacs signaling an error,
2736 its exit status is 1.
2738 *** New emacsclient argument --parent-id ID.
2739 This opens a client frame in parent X window ID, via XEmbed, similar
2740 to the --parent-id argument to Emacs.
2742 ** Internationalization changes
2744 *** Emacs now supports display and editing of bidirectional text.
2745 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2746 displayed in the correct visual order as expected by users of those
2747 scripts. The display reordering is a "full bidirectionality" class
2748 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2749 with no RTL text should look exactly the same as before.
2751 **** New buffer-local variable `bidi-display-reordering'.
2752 To disable display reordering in a buffer, change this to nil.
2754 **** New buffer-local variable `bidi-paragraph-direction'.
2755 If nil (the default), Emacs determines the base direction of each
2756 paragraph from its text, as specified by the UBA. Setting the value
2757 to `right-to-left' or `left-to-right' forces a base direction on each
2760 Paragraphs with right-to-left base direction are displayed starting at
2761 the right window edge.
2763 *** Enhanced support for characters with no glyphs in available fonts,
2764 or, on text terminals, characters that cannot be encoded by the
2765 terminal coding system. The new option `glyphless-char-display-control'
2766 specifies how to display them: as a hexadecimal code in a box, a thin
2767 1-pixel space, an empty box, etc.
2769 *** New input methods for Farsi and Bulgarian
2770 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2772 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2773 (U+2010 and U+2011).
2775 *** New Hebrew translation of the Emacs Tutorial.
2776 Type `C-u C-h t' to choose it in case your language setup doesn't
2777 automatically select it.
2779 ** An Emacs Lisp package manager is now included.
2780 This is a convenient way to download and install additional packages,
2781 from a package repository at http://elpa.gnu.org.
2783 *** M-x list-packages shows a list of packages, which can be
2784 selected for installation.
2786 *** New command `describe-package', bound to `C-h P'.
2788 *** By default, all installed packages are loaded automatically when
2789 Emacs starts up. To disable this, set `package-enable-at-startup' to
2790 nil. To specify the packages to load, customize `package-load-list'.
2792 ** Custom theme changes
2794 *** New command `M-x customize-themes', which provides a convenient
2795 interface for enabling and disabling Custom themes.
2797 *** New option `custom-theme-load-path' is the load path for themes.
2798 Emacs no longer looks for Custom themes in `load-path'. The default
2799 value of `custom-theme-load-path' says to look for themes in
2800 `custom-theme-directory', followed by a subdirectory of
2801 `data-directory' named "themes/", which contains a small selection of
2802 built-in Custom themes.
2804 *** New option `custom-safe-themes' records known-safe theme files.
2805 If a theme is not in this list, Emacs queries before loading it, and
2806 offers to save the theme to `custom-safe-themes' automatically. By
2807 default, all themes included in Emacs are treated as safe.
2809 ** Improved GTK integration
2811 *** GTK scroll-bars are now placed on the right by default.
2812 The function `set-scroll-bar-mode' can change this.
2814 *** GTK tool bars can have just text, just images or images and text.
2815 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2816 the default is taken from desktop settings.
2818 *** GTK tool bars can be placed on any edge of the frame.
2819 The frame-parameter tool-bar-position controls this. It takes the
2820 values top, left, right or bottom. The Options => Show/Hide menu has
2823 *** The default colors for selected text (the `region' face) are taken
2824 from the GTK theme when Emacs is built with GTK.
2826 *** Emacs uses GTK tooltips by default if built with GTK.
2827 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2829 ** Graphical interface changes
2831 *** On graphical displays, the mode-line no longer ends in dashes.
2832 Also, the first dash (which does not indicate anything) is just
2833 displayed as a space.
2835 *** `menu-bar-select-buffer-function' lets you choose another operation
2836 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2838 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2839 built with Xft. These fonts can be set via X resources, for example:
2840 Emacs.pane.menubar.font: Courier-12
2844 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2845 or if it receives a SIGINT signal in batch mode.
2847 *** `kill-emacs-hook' is now also run in batch mode.
2848 Third-party code which adds to `kill-emacs-hook' should check if they
2849 do the right thing in batch mode.
2851 ** Scrolling changes
2853 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2854 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2855 of buffer at first key-press (instead they move to top/bottom of buffer)
2856 when `scroll-error-top-bottom' is non-nil.
2858 *** New option `scroll-error-top-bottom' (see above).
2860 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2861 scroll a line instead of full screen.
2863 *** New property `scroll-command' should be set on a command's symbol to
2864 define it as a scroll command affected by `scroll-preserve-screen-position'.
2866 *** If you customize `scroll-conservatively' to a value greater than 100,
2867 Emacs will never recenter point in the window when it scrolls due to
2868 cursor motion commands or commands that move point (e.f., `M-g M-g').
2869 Previously, you needed to use `most-positive-fixnum' as the value of
2870 `scroll-conservatively' to achieve the same effect.
2872 *** "Aggressive" scrolling now honors the scroll margins.
2873 If you customize `scroll-up-aggressively' or
2874 `scroll-down-aggressively' and move point off the window, Emacs now
2875 scrolls the window so as to avoid positioning point inside the scroll
2878 ** Basic SELinux support has been added.
2879 This requires Emacs to be linked with libselinux at build time.
2881 *** Emacs preserves the SELinux file context when backing up.
2882 Also, the function `copy-file' has an extra optional argument for
2883 preserving SELinux context, and the return value of `backup-buffer'
2884 now includes the SELinux context.
2886 *** New functions `file-selinux-context' and `set-file-selinux-context'
2887 get and set the SELinux context of a file.
2891 *** `delete-by-moving-to-trash' now only affects commands that specify
2892 trashing. This avoids inadvertently trashing temporary files.
2894 *** Calling `delete-file' or `delete-directory' with a prefix argument
2895 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2897 ** File- and directory-local variable changes
2899 *** You can stop directory local vars from applying to subdirectories.
2900 Add an element (subdirs . nil) to the alist portion of any variables
2901 settings to indicate that the section should not apply to
2904 *** Directory local variables can apply to some file-less buffers.
2905 Affected modes include dired, vc-dir, and log-edit. For example,
2906 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2907 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2908 `hack-dir-local-variables-non-file-buffer' to support this.
2910 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2911 Instead, use "eval: (minor-mode 1)".
2913 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2914 to `inhibit-local-variables-regexps'. As the name suggests, it now
2915 applies to ALL file local variables, not just -*- lines. The
2916 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2921 *** The `quit-window' command now restores the last buffer displayed
2922 in the quitted window.
2924 *** Resizing an Emacs frame now preserves proportional window sizes,
2925 modulo restrictions like window minimum sizes and fixed-size windows.
2927 *** The behavior of `display-buffer' is now customizable in detail.
2929 **** New option `display-buffer-base-action' specifies a list of
2930 user-determined display "actions" (functions and optional arguments
2931 for choosing the displaying window).
2933 This takes precedence over the default display action, which is
2934 specified by `display-buffer-fallback-action'.
2936 **** New option `display-buffer-alist' maps buffer name regexps to
2937 display actions, taking precedence over `display-buffer-base-action'.
2939 *** New option `window-combination-limit'.
2940 The new option `window-combination-limit' allows to return the space
2941 obtained for resizing or creating a window more reliably to the window
2942 from which such space was obtained.
2944 *** New option `window-combination-resize'.
2945 The new option `window-combination-resize' allows to split a window that
2946 otherwise cannot be split because it's too small by stealing space from
2947 other windows in the same combination. Subsequent resizing or deletion
2948 of the window will resize all windows in the same combination as well.
2950 *** New option `frame-auto-hide-function' lets you choose between
2951 iconifying or deleting a frame when burying a buffer in a dedicated
2952 frame, or quitting a window showing a buffer in a frame of its own.
2954 *** New commands `maximize-window' and `minimize-window'.
2955 These maximize and minimize the size of a window within its frame.
2957 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2958 These functions allow to navigate through the live buffers that have
2959 been shown in a specific window.
2961 ** Minibuffer changes
2963 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2964 This is handy for minibuffer-only frames, and is also used for the feature
2965 where mouse-1 pops up *Messages*"', which can now easily be changed.
2967 *** Minibuffers set `truncate-lines' to nil.
2968 If you want to change the value to something else, you could use
2969 for example `minibuffer-setup-hook'.
2971 ** `auto-mode-case-fold' is now enabled by default.
2973 ** `backup-by-copying-when-mismatch' now defaults to t.
2975 ** New basic faces `error', `warning', `success'.
2976 These are used to highlight text indicating failure, caution or
2977 successful operation.
2979 ** New option `list-colors-sort' defines the color sort order
2980 for `list-colors-display'.
2982 ** The variable `focus-follows-mouse' now always defaults to nil.
2985 * Editing Changes in Emacs 24.1
2989 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2990 `isearch-yank-line'.
2992 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2993 `isearch-yank-kill'.
2995 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2997 ** New commands `count-words-region' and `count-words'.
2999 *** M-= is bound to `count-words-region', not `count-lines-region'.
3000 The `count-words-region' command, when called interactively, reports
3001 the number of lines, words, and characters in the region. It is a
3002 superset of the old `count-lines-region', which is now an obsolete
3005 ** The command `just-one-space' (M-SPC), if given a negative argument,
3006 also deletes newlines around point.
3010 *** New option `delete-active-region'.
3011 If non-nil, [delete] and DEL delete the region if it is active and no
3012 prefix argument is given. If set to `kill', those commands kill
3015 *** New command `delete-forward-char', bound to [delete].
3016 This is meant for interactive use, and obeys `delete-active-region'.
3017 The command `delete-char' does not obey `delete-active-region'.
3019 *** `delete-backward-char' is now a Lisp function.
3020 Apart from obeying `delete-active-region', its behavior is unchanged.
3021 However, the byte compiler now warns if it is called from Lisp; Lisp
3022 callers should use delete-char with a negative argument instead.
3024 *** The option `mouse-region-delete-keys' has been deleted.
3026 ** Selection changes.
3028 The default handling of clipboard and primary selections has been
3029 changed to conform with modern X applications. In short, most
3030 commands for killing and yanking text now use the clipboard, while
3031 mouse commands use the primary selection.
3033 In the following, we provide a list of these changes, followed by a
3034 list of steps to get the old behavior back if you prefer that.
3036 *** `select-active-regions' now defaults to t.
3037 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3038 the kill ring. The selected text is put in the primary selection, if
3039 the system possesses a separate primary selection facility (e.g. X).
3041 **** `select-active-regions' also accepts a new value, `only'.
3042 This means to only set the primary selection for temporarily active
3043 regions (usually made by mouse-dragging or shift-selection);
3044 "ordinary" active regions, such as those made with C-SPC followed by
3045 point motion, do not alter the primary selection.
3047 **** `mouse-drag-copy-region' now defaults to nil.
3049 *** mouse-2 is now bound to `mouse-yank-primary'.
3050 This pastes from the primary selection, ignoring the kill-ring.
3051 Previously, mouse-2 was bound to `mouse-yank-at-click'.
3053 *** `x-select-enable-clipboard' now defaults to t on all platforms.
3055 *** `x-select-enable-primary' now defaults to nil.
3056 Thus, commands that kill text or copy it to the kill-ring (such as
3057 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3059 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3060 exactly equivalent to M-w, C-w, and C-y respectively.
3062 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
3063 non-nil by default, as Windows does not support the primary selection
3064 between applications.
3066 *** To return to the previous behavior, do the following:
3068 **** Change `select-active-regions' to nil.
3069 **** Change `mouse-drag-copy-region' to t.
3070 **** Change `x-select-enable-primary' to t (on X only).
3071 **** Change `x-select-enable-clipboard' to nil.
3072 **** Bind `mouse-yank-at-click' to mouse-2.
3074 *** Support for X cut buffers has been removed.
3076 *** X clipboard managers are now supported.
3077 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3079 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3080 in the current rectangle. With a prefix argument, this prompts for a
3081 number to count from and for a format string.
3083 ** `redisplay-dont-pause' now defaults to t.
3084 This makes Emacs feel more responsive to editing commands that arrive
3085 at high rate, e.g. if you lean on some key, because stopping redisplay
3086 in the middle (when this variable is nil) forces more expensive
3087 updates later on, and Emacs appears to be unable to keep up.
3089 ** The behavior of <TAB> for active regions in Text mode has changed.
3090 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3091 when the region is active causes Emacs to indent all the lines in the
3092 region, aligning them with the line previous to the first line in the
3093 region (or with the left margin if there is no previous line).
3095 ** When `occur' is called with a prefix argument, matching strings are
3096 collected into the `*Occur*' buffer without line numbers. If there
3097 are parenthesized subexpressions in the specified regexp, `occur'
3098 reads replacement text that may contain \\& and \\N whose convention
3099 follows `replace-match'.
3102 * Changes in Specialized Modes and Packages in Emacs 24.1
3104 ** Archive Mode has basic support for browsing and updating 7z archives.
3108 *** BibTeX mode now supports biblatex.
3109 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3110 `bibtex-entry-field-alist' is now an obsolete alias for
3111 `bibtex-BibTeX-entry-alist'.
3113 *** New command `bibtex-search-entries', bound to C-c C-a.
3115 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3117 *** New variable `bibtex-search-entry-globally'.
3121 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3123 *** The default browser used by the package is now the "xdg-open" program,
3124 on platforms that support it. This calls your desktop's preferred browser.
3128 *** Support for musical notes.
3130 *** Support for logarithmic units.
3132 *** No longer uses the tex prefix for TeX specific unit names when
3133 using TeX or LaTeX mode.
3135 *** New option to highlight selections using faces.
3137 *** `calc-histogram' has the option of using a vector to determine the bins.
3139 *** New "O" option prefix.
3141 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3143 ** Calendar, Diary, and Appt
3145 *** Diary entries can contain non-printing "comments".
3146 See the variable `diary-comment-start'.
3148 *** Appointments can specify their individual warning times.
3149 See the variable `appt-warning-time-regexp'.
3151 *** The function specified by `appt-disp-window-function' may be passed
3152 lists of arguments if multiple appointments are due at similar times.
3153 If you are using a custom function for this, you should update it.
3155 *** New function `diary-hebrew-birthday'.
3157 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3158 may no longer be nil, but must all be strings.
3160 *** The obsolete (since Emacs 22.1) method of enabling the appt
3161 package by adding `appt-make-list' to `diary-hook' has been removed.
3162 Use `appt-activate' instead.
3164 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3165 appt-issue-message (use the function appt-activate)
3166 appt-visible/appt-msg-window (use the variable appt-display-format)
3168 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3169 view-diary-entries, list-diary-entries, show-all-diary-entries
3173 *** New feature to "guess" the style in an existing buffer.
3174 The main entry point is M-x c-guess.
3176 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3178 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3179 Thus C-M-a will, by default, go to the beginning of the immediate function,
3182 *** "Macros with semicolons" can be registered for correct indentation.
3183 Where such a macro ends a line (no semicolon) the next statement is no longer
3184 parsed as a statement continuation.
3186 ** Comint and modes derived from it use the standard completion code.
3190 *** Compilation mode can be used without Font Lock mode.
3191 `compilation-parse-errors-function' is now obsolete.
3193 *** New variable `compilation-filter-start', which is bound while
3194 `compilation-filter-hook' runs. It records the start position of the
3195 text inserted by `compilation-filter'.
3197 *** `compilation-error-screen-columns' and `compilation-first-column'
3198 are obeyed in the editing buffer. So programming language modes can
3199 set them, whereas previously only the value in the *Compilation*
3204 *** Customize buffers now contain a search field.
3205 The search is performed using `customize-apropos'.
3206 To turn off the search field, set `custom-search-field' to nil.
3208 *** Options in customize group buffers start out hidden if not customized.
3209 Use the arrow to the left of the option name to toggle visibility.
3211 *** custom-buffer-sort-alphabetically now defaults to t.
3213 *** The color widget now has a "Choose" button, which allows you to
3214 choose a color via `list-colors-display'.
3218 *** It is now possible to access buses other than the default system
3221 *** The `dbus-register-method' and `dbus-register-property' functions
3222 optionally do not register names.
3224 *** The new function `dbus-register-service' registers a known service
3225 name on a D-Bus without also registering a property or a method.
3229 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3230 if called with a prefix argument, read a file name from the minibuffer
3231 instead of using the current buffer.
3233 *** The "dired local variables" feature of Dired-x is obsolete.
3234 The standard directory local variables feature replaces it.
3238 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3239 controlling attempts to autojoin a channel.
3241 *** New variable `erc-coding-system-precedence': If we use `undecided'
3242 as the server coding system, this variable will then be consulted.
3243 The default is to decode strings that can be decoded as utf-8 as
3244 utf-8, and do the normal `undecided' decoding for the rest.
3248 *** The default value of `eshell-directory-name' has changed
3249 to be an "eshell" directory in `user-emacs-directory'.
3250 The old "~/.eshell/" directory is still used if it exists, though.
3254 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3255 It now supports multithread non-stop debugging and simultaneous
3256 debugging of several threads.
3260 *** RET (`image-toggle-animation') toggles animation, if applicable.
3261 Animation plays once, unless the option `image-animate-loop' is non-nil.
3265 *** New command M-x info-display-manual displays a named Info manual.
3266 If that manual is already visited in some Info buffer, it displays
3267 that buffer. (This is handy if you have many manuals in many *info*
3268 buffers, and don't remember the name of the buffer visiting the manual
3269 you want to consult.) Otherwise, it loads and displays the manual.
3271 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3272 This is for compatibility with the stand-alone Info reader program,
3273 and also because `Info-edit' is a rarely used command that is disabled
3276 ** Mail mode changes (not Message mode)
3278 *** New command M-x mail-add-attachment for adding MIME attachments
3280 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3281 (Its name is misleading, since it has nothing to do with MIME
3282 attachments.) The old name is now an obsolete alias to the new name.
3284 ** MH-E has been updated to MH-E version 8.3.1.
3285 See MH-E-NEWS for details.
3287 ** Modula-2 mode provides auto-indentation.
3289 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3291 ** nXML mode no longer binds C-RET to `nxml-complete'.
3292 Completion is now performed via `completion-at-point', bound to C-M-i
3293 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3294 default), this performs tag completion.
3296 ** Org mode has been updated to version 7.8.09.
3297 See ORG-NEWS for details.
3299 ** Prolog mode has been completely revamped, with lots of additional
3300 functionality such as more intelligent indentation, electricity,
3301 support for more variants, including Mercury, and a lot more.
3305 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3306 in the Rmail incoming message.
3308 *** The variable `rmail-message-filter' no longer has any effect.
3309 This change was made in Emacs 23.1 but was not advertised at the time.
3310 Try using `rmail-show-message-hook' instead.
3314 *** M-x shell prompts for the shell path name if the default directory
3315 is a remote file name and neither the environment variable $ESHELL nor
3316 the variable `explicit-shell-file-name' is set.
3318 *** TAB is now bound to the standard `completion-at-point' command,
3319 which now implements the pcomplete rules for shell command completion.
3323 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3324 if the mail server supports them. This uses either built-in GnuTLS
3325 support, or the starttls.el library. Customize `smtpmail-stream-type'
3328 *** The variable `smtpmail-auth-credentials' has been removed.
3329 By default, the information is now stored in the file ~/.authinfo.
3330 This was the default value of smtpmail-auth-credentials. If you had
3331 customized smtpmail-auth-credentials to a list of user names and
3332 passwords, those settings are not used. During your first connection
3333 to the smtp server, Emacs will prompt for the user name and password,
3334 and offer to save them to ~/.authinfo. Or you can manually copy the
3335 credentials to ~/.authinfo. For example, if you had
3337 (setq smtpmail-auth-credentials
3338 '(("mail.example.org" 25 "jim" "s!cret")))
3340 then the equivalent line in ~/.authinfo would be
3342 machine mail.example.org port 25 login jim password s!cret
3344 See the auth-source manual for more information, e.g. on encrypting
3345 the credentials file.
3347 *** The variable `smtpmail-starttls-credentials' has been removed.
3348 If you had that set, you need to put
3350 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3352 in your ~/.authinfo file instead.
3354 *** SMTPmail defaults to using the address in the From: header as the
3355 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3356 to the address you wish to use instead.
3360 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3361 and `sql-oracle-scan-on'.
3363 *** New options controlling prompting for login parameters.
3364 Each supported product has a custom variable `sql-*-login-params',
3365 which is a list of the parameters to be prompted for before a
3366 connection is established.
3368 *** The command `sql-product-interactive' now takes a prefix argument,
3369 which causes it to prompt for an SQL product.
3371 *** Product-specific SQL interactive commands now take prefix arguments.
3372 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3373 given a prefix argument, prompt for a name for the SQL interactive
3374 buffer. This reduces the need for calling `sql-rename-buffer'.
3376 *** SQL interactive modes suppress command continuation prompts, and
3377 replace tabs with spaces. The first change impacts multiple line SQL
3378 statements entered with C-j between each line, statements yanked into
3379 the buffer and statements sent with `sql-send-*' functions. The
3380 second prevents the MySQL and Postgres interpreters from listing
3381 object name completions when sent text via `sql-send-*' functions.
3383 *** New command `sql-connect' starts a predefined SQLi session,
3384 using the login parameters from `sql-connection-alist'.
3386 *** New "Save Connection" menu item in SQLi buffers.
3387 This gathers the login params specified for the SQLi session, if it
3388 was not started by a connection, and saves them as a new connection.
3390 *** New commands for listing database objects and details:
3391 sql-list-all and sql-list-table.
3393 *** An API for manipulating SQL product definitions has been added.
3397 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3401 *** New inline access method "ksu" (kerberized su).
3403 *** The following access methods are discontinued: "ssh1_old",
3404 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3406 *** The user option `remote-file-name-inhibit-cache' controls whether
3407 remote file attributes are cached for better performance.
3409 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3410 default value to "".
3412 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3413 for remote machines which support SELinux.
3415 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3416 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3417 the degree of parallelism.
3419 ** VC and related modes
3421 *** Support for pulling on distributed version control systems.
3422 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3423 supported (currently with Bzr, Git, and Mercurial), to update the
3424 current branch and working tree. A prefix argument means to prompt
3425 the user for specifics, e.g. a pull location.
3427 *** `vc-update' is now an alias for `vc-pull'.
3429 *** Support for merging on distributed version control systems.
3430 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3431 is supported (currently with Bzr, Git, and Mercurial), to merge
3432 changes from another branch into the current one. It prompts for
3433 specifics, e.g. a merge source.
3435 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3436 shows a diff while querying the user. It defaults to t.
3438 *** Log entries in some Log View buffers can be toggled to display a
3439 longer description by typing RET (log-view-toggle-entry-display).
3440 This is currently supported for Bzr, Git, and Mercurial (to support
3441 another backend, define a `log-view-expanded-log-entry-function').
3442 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3443 use this to display the full log entry for the revision at point.
3445 *** New command `vc-ediff' allows visual comparison of two revisions
3446 of a file similar to `vc-diff', but using ediff backend.
3448 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3449 this was not advertised at the time.
3451 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3452 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3453 this was not advertised at the time.
3459 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3461 *** partial-completion-mode (complete.el) is obsolete.
3462 You can get a comparable behavior with:
3463 (setq completion-styles '(partial-completion initials))
3464 (setq completion-pcm-complete-word-inserts-delimiters t)
3466 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3468 *** pgg is obsolete (use EasyPG instead).
3470 *** sregex.el is obsolete, since rx.el is a strict superset.
3472 *** s-region.el and pc-select.el are obsolete.
3473 They are superseded by shift-select-mode, enabled by default since 23.1.
3475 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3479 *** The Landmark game is now invoked with `landmark', not `lm'.
3480 Its functions and variables have been similarly renamed.
3482 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3483 (This interfered with cua-mode.)
3485 *** f90.el has some support for Fortran 2008 syntax.
3487 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3489 *** New command `nato-region' converts text to NATO phonetic alphabet.
3492 * New Modes and Packages in Emacs 24.1
3494 ** Occur Edit mode applies edits made in *Occur* buffers to the
3495 original buffers. It is bound to "e" in Occur mode.
3497 ** New global minor mode electric-pair-mode.
3498 When enabled, typing an open parenthesis automatically inserts the
3499 matching closing one.
3501 ** New global minor mode electric-indent-mode.
3502 When enabled, typing certain characters triggers reindentation.
3503 Major modes wishing to use this can set electric-indent-chars or
3504 electric-indent-functions.
3506 ** New global minor mode electric-layout-mode.
3507 When enabled, typing certain characters automatically inserts newlines.
3508 Major modes wishing to use this can set electric-layout-rules.
3510 ** tabulated-list.el provides a generic major mode for tabulated data,
3511 from which other modes can be derived.
3513 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3515 ** secrets.el is an implementation of the Secret Service API, an
3516 interface to password managers like GNOME Keyring or KDE Wallet. The
3517 Secret Service API requires D-Bus for communication. The command
3518 `secrets-show-secrets' offers a buffer with a visualization of the
3521 ** notifications.el provides an implementation of the Desktop
3522 Notifications API. It requires D-Bus for communication.
3524 ** soap-client.el supports access to SOAP web services from Emacs.
3525 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3527 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3529 ** New emacs-lock.el package.
3530 The previous version has been moved to obsolete/old-emacs-lock.el.
3531 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3532 against exiting Emacs and killing the buffer can be set separately.
3533 The mechanism for automatically turning off protection for buffers
3534 with dead inferior processes has been generalized.
3537 * Incompatible Lisp Changes in Emacs 24.1
3539 ** Passing a nil argument to a minor mode function call now ENABLES
3540 the minor mode unconditionally. This is so that you can write e.g.
3542 (add-hook 'text-mode-hook 'foo-mode)
3544 to enable foo-mode in Text mode buffers, removing the need for
3545 `turn-on-foo-mode' style functions. This affects all mode commands
3546 defined by `define-minor-mode'. If called interactively, the mode
3547 command still toggles the minor mode.
3549 ** The return value of `backup-buffer' has changed.
3550 It is now a list of three elements, where the second element is a list
3551 describing the original file's SELinux context. If Emacs or the
3552 system lacks SELinux support, the context list is (nil nil nil nil).
3553 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3555 ** `char-direction-table' and the `char-direction' function were deleted.
3556 They were buggy and inferior to the new support of bidirectional
3557 editing introduced in Emacs 24. If you need the bidirectional
3558 properties of a character, use `get-char-code-property' with the last
3559 argument `bidi-class'.
3561 ** `copy-directory' now copies the source directory as a subdirectory
3562 of the target directory, if the latter is an existing directory. The
3563 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3564 the contents directly into a pre-existing target directory.
3566 ** For mouse click input events in the text area, the Y pixel
3567 coordinate in the POSITION list now counts from the top of the text
3568 area, excluding any header line. Previously, it counted from the top
3571 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3572 been further reduced. Now a backquote not followed by a space is
3573 always treated as a "new-style" backquote. Please remove all
3574 "old-style" backquotes from your code. If your code uses backquotes
3575 as documented in the Elisp manual, and compiles without warning, then
3576 you have nothing to do in this regard. Code not following the
3577 appropriate conventions may fail to compile.
3579 The most common cause of trouble seems to be an old-style backquote
3580 followed by a newline. Another cause of trouble is vector notation
3581 for key sequence notation: instead of [(control ,)] and [(control ')],
3582 you should write [(control ?,)] and [(control ?')], which will work in
3585 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3586 was not advertised at the time. The function `custom-initialize-delay'
3587 replaced all known uses.
3589 ** `view-buffer' now treats special mode-class in the same way that
3590 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3591 major mode is special).
3593 ** Menu and tool bar changes
3595 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3596 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3597 With these alist entries omitted, `make-frame' checks the value of the
3598 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3599 a menu-bar or tool-bar, respectively. If the alist entries are added,
3600 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3602 *** The menu bar bindings's caches are not used any more.
3603 Use (where-is-internal <def> nil t) instead.
3605 ** Regions created by mouse dragging are now normal active regions,
3606 similar to those created by shift-selection (see Selection changes
3607 above). In previous Emacs versions, these regions were delineated by
3608 `mouse-drag-overlay'; that variable has been removed.
3610 ** The fourth argument of `filter-buffer-substring' has been removed.
3611 If you want to remove text properties from the final result, simply
3612 pass the result through substring-no-properties.
3614 ** cl.el no longer provides `cl-19'.
3616 ** The following obsolete functions and aliases have been removed
3617 (the appropriate new function is given in parentheses; "not needed"
3618 means you can just remove all calls to the function in question):
3620 *** `comint-kill-output' (`comint-delete-output')
3621 *** `decompose-composite-char' (`char-to-string')
3622 *** `outline-visible' (`outline-invisible-p')
3623 *** `internal-find-face' (`facep')
3624 *** `internal-get-face' (`facep and check-face')
3625 *** `frame-update-faces' (not needed)
3626 *** `frame-update-face-colors' (`frame-set-background-mode')
3627 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3628 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3629 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3630 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3631 *** `x-make-font-unbold' (`make-face-unbold')
3632 *** `x-make-font-unitalic' (`make-face-unitalic')
3633 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3634 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3635 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3636 *** `char-bytes' (== 1)
3637 *** `isearch-return-char' (`isearch-printing-char')
3638 *** `make-local-hook' (not needed)
3639 *** `set-screen-height' (`set-frame-height')
3640 *** `set-screen-width' (`set-frame-width')
3642 ** The following obsolete variables and varaliases have been removed
3643 (the appropriate new variable is given in parentheses):
3645 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3646 *** `vc-header-alist' (`vc-BACKEND-header')
3647 *** `directory-sep-char' (== ?/)
3648 *** `font-lock-defaults-alist' (`font-lock-defaults')
3649 *** `e' (`float-e').
3651 ** The following obsolete files were removed:
3652 sc.el, x-menu.el, rnews.el, rnewspost.el
3654 ** The format of the finder-inf.el file has changed, since the Finder
3655 mechanism is now based on the package system. The variable
3656 `finder-package-info' is replaced by `package--builtins' and
3657 `finder-keywords-hash'.
3659 ** When generating autoloads, `update-directory-autoloads' no longer
3660 assumes every inspected file is in your `load-path'. It instead
3661 generates relative names according to the current `load-path'.
3664 * Lisp Changes in Emacs 24.1
3666 ** Code can now use lexical scoping by default instead of dynamic scoping.
3667 The `lexical-binding' variable enables lexical scoping for local
3668 variables. It is typically set via a file-local variable in the first
3669 line of the file, in which case it applies to all the code in that
3672 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3673 binding instead of the old dynamic binding mode.
3675 *** Lexically scoped interpreted functions are represented with a new form
3676 of function value which looks like (closure ENV ARGS &rest BODY).
3678 *** New macro `letrec' to define recursive local functions.
3680 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3681 So do `defcustom' and other forms that call `defvar' as a subroutine.
3683 *** New function `special-variable-p' to check whether a variable is
3684 declared as dynamically bound.
3686 *** The form ((lambda ...) ...) is deprecated.
3688 ** An Emacs Lisp testing tool is now included.
3689 Emacs Lisp developers can use this tool to write automated tests for
3690 their code. See the ERT info manual for details.
3692 ** Changes for bidirectional display and editing
3694 *** New function `current-bidi-paragraph-direction'.
3695 This returns the base direction of the paragraph at point.
3697 *** New function `bidi-string-mark-left-to-right'.
3698 Given a string containing characters from right-to-left scripts, this
3699 function returns another string which can be safely inserted into a
3700 buffer, such that any following text will be always displayed to the
3701 right of that string. (This works by appending an invisible Unicode
3702 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3704 This is useful when the buffer has overall left-to-right paragraph
3705 direction and you need to insert a string whose contents are not known
3706 in advance, without disrupting the layout of the line.
3710 *** Window tree functions are accessible in Elisp.
3711 Functions are provided to return the parent, siblings or child windows
3712 of any window including internal windows (windows not associated with a
3713 buffer) in the window tree.
3715 **** New function `window-valid-p' gives non-nil for live and internal
3718 **** Window manipulation can deal with internal windows.
3719 Many window handling functions like `split-window', `delete-window', or
3720 `delete-other-windows' as well as the window resizing functions can now
3721 act on any window including internal ones.
3723 *** window-total-height/-width vs window-body-height/-width.
3724 The function `window-height' has been renamed to `window-total-height'
3725 and `window-width' has been renamed to `window-body-width'. The old
3726 names are provided as aliases. Two new functions `window-total-width'
3727 and `window-body-height' are provided.
3729 *** Window parameters specific to window handling functions.
3730 For each window you can specify a parameter to override the default
3731 behavior of a number of functions like `split-window', `delete-window'
3732 and `delete-other-windows'. The variable `ignore-window-parameters'
3733 allows to ignore processing such parameters.
3735 *** New semantics of third argument of `split-window'.
3736 The third argument of `split-window' has been renamed to SIDE and can be
3737 set to any of the values 'below, 'right, 'above, or 'left to make the
3738 new window appear on the corresponding side of the window that shall be
3739 split. Any other value of SIDE will cause `split-window' to split the
3740 window into two side-by-side windows as before.
3742 *** Window resizing functions.
3743 A new standard function for resizing windows called `window-resize' has
3744 been introduced. This and all other functions for resizing windows no
3745 longer delete any windows when they become too small.
3747 *** Deleting the selected window now selects the most recently selected
3748 live window on that frame instead.
3750 *** `adjust-window-trailing-edge' adjustments.
3751 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3752 is able to resize other windows if a window adjacent to the trailing
3753 edge cannot be shrunk any more. This makes its behavior more similar to
3754 that of Emacs 21 without compromising, however, its inability to delete
3755 windows which was introduced in Emacs 22.
3757 *** Window-local buffer lists.
3758 Windows now have local buffer lists. This means that removing a buffer
3759 from display in a window will preferably show the buffer previously
3760 shown in that window with its previous window-start and window-point
3761 positions. This also means that the same buffer may be automatically
3762 shown twice even if it already appears in another window.
3764 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3765 which if non-nil requires the buffer to be displayed in the currently
3766 selected window, signaling an error otherwise. If nil, another window
3767 can be used, e.g. if the selected one is strongly dedicated.
3769 *** `split-window-vertically' and `split-window-horizontally' renamed
3770 to `split-window-below' and `split-window-right' respectively.
3771 The old names are kept as aliases.
3775 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3776 named ACTION, and takes a display action of the same form as
3777 `display-buffer-base-action' (see Changes, above). A non-nil,
3778 non-list value is treated specially, as the old meaning.
3780 **** New variable `display-buffer-overriding-action'.
3782 **** The procedure of `display-buffer' etc. to choose a window is
3783 determined by combining `display-buffer-overriding-action',
3784 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3785 and `display-buffer-fallback-action'. The second and fourth of these
3786 are user-customizable variables.
3788 See the docstring of `display-buffer' for details.
3790 *** New functions `window-state-get' and `window-state-put'.
3791 These functions allow to save and restore the state of an arbitrary
3792 frame or window as an Elisp object.
3796 *** New variable `completion-extra-properties' used to specify extra
3797 properties of the current completion:
3798 - :annotate-function, same as the old completion-annotate-function.
3799 - :exit-function, function to call after completion took place.
3801 *** Functions on `completion-at-point-functions' can return any of the
3802 properties valid for `completion-extra-properties'.
3804 *** `completion-annotate-function' is obsolete.
3806 *** New `metadata' method for completion tables. The metadata thus returned
3807 can specify various details of the data returned by `all-completions':
3808 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3809 used to select a style in completion-category-overrides.
3810 - `annotation-function' to add annotations in *Completions*.
3811 - `display-sort-function' to specify how to sort entries in *Completions*.
3812 - `cycle-sort-function' to specify how to sort entries when cycling.
3814 *** `minibuffer-local-filename-must-match-map' is not used any more.
3815 Instead, the bindings in `minibuffer-local-filename-completion-map'
3816 are combined with `minibuffer-local-must-match-map'.
3818 *** New variable `completing-read-function' allows overriding the
3819 behavior of `completing-read'.
3821 ** `glyphless-char-display' can now distinguish between graphical and
3822 text terminal display, via a char-table entry that is a cons cell.
3824 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3825 Instead, the offending function is removed.
3829 *** New function `run-hook-wrapped' for running an abnormal hook by
3830 passing the hook functions as arguments to a "wrapping" function.
3831 Like `run-hook-with-args-until-success', it stops at the first
3832 non-nil return value.
3834 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3835 set of "wrapping" filters, similar to around advice.
3836 (A version of this macro was actually added in Emacs 23.2 but was not
3837 advertised at the time.)
3841 *** New macro `condition-case-unless-debug' (this was actually added in
3842 Emacs 23.1 as condition-case-no-debug, but not advertised)
3844 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3846 *** Variable `stack-trace-on-error' removed.
3848 *** The debugger can now "continue" from an error, which means it will
3849 jump to the error handler as if the debugger had not been invoked
3850 instead of jumping all the way to the top-level.
3852 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3853 This can be useful when `inhibit-quit' is set.
3855 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3856 named Emacs server instances.
3858 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3859 to redirect STDOUT to a file.
3861 ** The function `format-time-string' now supports the %N directive,
3862 for higher-resolution time stamps.
3864 ** New input reading functions
3866 *** New function `read-char-choice' reads a restricted set of
3867 characters, discarding any inputs not inside the set.
3869 *** The command `read-color' now requires a match for a color name
3870 or RGB triplet, instead of signaling an error if the user provides
3873 **** `facemenu-read-color' is now an alias for `read-color'.
3875 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3876 The variable is now used to load all kind of supported dynamic libraries,
3877 not just image libraries. The previous name is still available as an
3880 ** Syntax parsing changes
3882 *** New variable `syntax-propertize-function'.
3883 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3884 This allows syntax-table properties to be set independently from font-lock:
3885 just call syntax-propertize to make sure the text is propertized.
3886 Together with this new variable come a new hook
3887 syntax-propertize-extend-region-functions, as well as two helper functions:
3888 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3889 as-is; and syntax-propertize-rules which provides a new way to specify
3892 *** Syntax tables support a new "comment style c" additionally to style b.
3894 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3896 ** frame-local variables cannot be let-bound any more.
3898 ** Major and minor mode changes
3900 *** `set-auto-mode' now respects mode: local variables at the end of files,
3901 as well as those in the -*- line.
3903 *** `prog-mode' is a new major mode from which programming modes
3906 **** `prog-mode-hook' can be used to enable features for programming
3907 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3908 on-the-fly spell checking for comments and strings.
3910 *** New hook `change-major-mode-after-body-hook', run by
3911 `run-mode-hooks' just before any other mode hooks.
3913 *** Enabled globalized minor modes can be disabled in specific major modes.
3914 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3915 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3917 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3919 ** File-handling changes
3921 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3922 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3923 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3924 argument is supplied (see Trash changes, above).
3926 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3928 ** Tool-bars can display separators.
3929 Tool-bar separators are handled like menu separators in menu-bar maps,
3930 i.e. via menu entries of the form `(menu-item "--")'.
3934 *** Animated images support (currently animated gifs only).
3936 **** `image-animated-p' returns non-nil if an image can be animated.
3938 **** `image-animate' animates a supplied image spec.
3940 **** `image-animate-timer' returns the timer object for an image that
3943 *** `image-extension-data' has been renamed to `image-metadata'.
3944 The old name is an obsolete alias to the new one.
3946 *** Image mode can view any image type that ImageMagick supports.
3947 This requires Emacs to be built with ImageMagick support.
3949 **** New function `imagemagick-types', defined if ImageMagick support
3950 is enabled, returns a list of image file extensions that your
3951 ImageMagick installation supports.
3953 **** New function `imagemagick-register-types' enables ImageMagick
3954 image types in Image mode and in `create-image' and other helper
3957 **** New option `imagemagick-types-inhibit' excludes certain
3958 ImageMagick image types from `imagemagick-register-types'.
3960 **** With ImageMagick support, there are extra Image mode commands to
3961 resize and rotate images: `image-transform-fit-to-height',
3962 `image-transform-fit-to-width', `image-transform-set-rotation', and
3963 `image-transform-set-scale'.
3965 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3966 passes it to the mail user agent function. This argument specifies an
3967 action for returning to the caller after finishing with the mail. For
3968 example, this is used by Rmail to optionally delete a mail window.
3970 ** XML and HTML parsing
3971 If Emacs is compiled with libxml2 support, there are two new
3972 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3973 and `libxml-parse-xml-region' (which parses XML). Both return an
3974 Emacs Lisp parse tree.
3976 ** Networking and encryption changes
3978 *** `open-network-stream' can now be used to open an encrypted stream.
3979 It now accepts an optional `:type' parameter for initiating a TLS
3980 connection, directly or via STARTTLS. To do STARTTLS, additional
3981 parameters (`:end-of-command', `:success', `:capabilities-command')
3982 must also be supplied.
3984 *** New library gnutls.el.
3985 The new function `gnutls-available-p' returns non-nil if Emacs is
3986 built with GnuTLS support. The main entry points are
3987 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3988 these functions through `open-network-stream', because that can
3989 upgrade connections through STARTTLS opportunistically or use plain
3990 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3993 *** New primitive `secure-hash' that supports many secure hash algorithms:
3994 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3995 sha1.el has been removed. The `sha1' feature is provided by default.
3999 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
4001 ** Progress reporters can now "spin".
4002 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
4003 now be nil, or omitted. This makes a "non-numeric" reporter. Each
4004 time you call `progress-reporter-update' on that progress reporter,
4005 with a nil or omitted VALUE argument, the reporter message is
4006 displayed with a "spinning bar".
4008 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
4009 being reverted, even if the buffer has a local `revert-buffer-function'.
4011 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
4012 If delayed-warnings-list is non-nil, the command loop calls
4013 `delayed-warnings-hook' after `post-command-hook'. At present, this
4014 is only used by Emacs on some platforms to display warnings during
4015 startup, which might otherwise not be noticed. This uses the
4016 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
4018 ** rx.el has a new `group-n' construct for explicitly numbered groups.
4020 ** New function `make-composed-keymap' that constructs a new keymap
4021 from multiple input maps. You can use this to make a keymap that
4022 inherits from multiple maps, eg:
4023 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4025 ** New function `string-prefix-p'.
4026 (This was actually added in Emacs 23.2 but was not advertised at the time.)
4028 ** New reader macro ## that stands for the empty symbol.
4029 This means that the empty symbol can now be read back. Also, #: by itself
4030 (when not immediately followed by a possible symbol character) stands for
4031 an empty uninterned symbol.
4033 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
4035 ** The following functions and variables are obsolete:
4037 *** `tooltip-use-echo-area' is obsolete.
4038 Rather than setting this to t, disable Tooltip mode instead.
4040 *** buffer-substring-filters is obsolete.
4041 Use `filter-buffer-substring-functions' instead.
4043 *** `byte-compile-disable-print-circle' is obsolete.
4045 *** `deferred-action-list' and `deferred-action-function' are obsolete.
4046 Use `post-command-hook' instead.
4048 *** `font-lock-maximum-size' is obsolete.
4051 * Changes in Emacs 24.1 on Non-Free Operating Systems
4053 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4054 and also when HOME is set to C:\ by default.
4056 ** New configure.bat options
4058 *** --enable-checking builds Emacs with extra runtime checks.
4060 *** --distfiles specifies files to be included in binary distribution.
4062 *** --without-gnutls disables automatic GnuTLS detection.
4064 *** --lib for general library linkage, works with the USER_LIBS build variable.
4066 ** New make target `dist' to create binary distribution for MS Windows.
4068 ** The Lisp function `w32-default-color-map' is now obsolete.
4069 (It is only used internally in the Emacs C code.)
4071 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4072 reappear on mouse-over. (Requires OS X 10.6 or later.)
4074 ** On Mac OS X, dragging a file into Emacs visits the file, like on
4075 other platforms, rather than inserting its contents into the buffer.
4078 ----------------------------------------------------------------------
4079 This file is part of GNU Emacs.
4081 GNU Emacs is free software: you can redistribute it and/or modify
4082 it under the terms of the GNU General Public License as published by
4083 the Free Software Foundation, either version 3 of the License, or
4084 (at your option) any later version.
4086 GNU Emacs is distributed in the hope that it will be useful,
4087 but WITHOUT ANY WARRANTY; without even the implied warranty of
4088 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4089 GNU General Public License for more details.
4091 You should have received a copy of the GNU General Public License
4092 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4097 paragraph-separate: "[
\f]*$"