1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
28 ** Emacs can now be compiled with ACL support.
29 This happens by default if a suitable support library is found at
30 build time, like libacl on GNU/Linux. To prevent this, use the
31 configure option `--disable-acl'. See below for related features.
34 ** Emacs can now be compiled with file notification support.
35 This happens by default if a suitable system library is found at
36 build time. To prevent this, use the configure option
37 `--without-file-notification'. See below for file-notify features.
38 This feature is not available for the Nextstep port.
41 ** Emacs can now be compiled with zlib support.
42 This happens by default if zlib is present, which it normally is.
43 To prevent this, use the configure option `--without-zlib'.
44 This provides the function `zlib-decompress-region'; see below for details.
47 ** The configure option `--without-compress-info' has been generalized,
48 and renamed to `--without-compress-install'. It now prevents compression
49 of _any_ files during installation.
52 ** The configure option `--with-crt-dir' has been removed.
53 It is no longer needed, as the crt*.o files are no longer linked specially.
56 ** Directories passed to configure option `--enable-locallisppath' are
57 no longer created during installation.
60 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
61 This requires pkg-config to be available at build time.
64 * Startup Changes in Emacs 24.4
67 ** When initializing `load-path', an empty element in the EMACSLOADPATH
68 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
69 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
70 load-path (the one that would have been used if EMACSLOADPATH was unset).
71 This makes it easier to _extend_ the load-path via EMACSLOADPATH
72 (previously, EMACSLOADPATH had to specify the complete load-path,
73 including the defaults). (In older versions of Emacs, an empty element
74 was replaced by ".", so use an explicit "." now if that is what you want.)
77 ** The -L option, which normally prepends its argument to load-path,
78 will instead append, if the argument begins with `:' (or `;' on MS Windows;
79 i.e., `path-separator').
82 ** If you use either site-load.el or site-init.el to customize the dumped
83 Emacs executable, any changes to `load-path' that these files make
84 will no longer be present after dumping. To affect a permanent change
85 to `load-path', use the `--enable-locallisppath' option of `configure'.
88 ** The user option `initial-buffer-choice' can now specify a function
89 to set up the initial buffer.
92 * Changes in Emacs 24.4
94 ** New function `zlib-decompress-region', which decompresses gzip- and
95 zlib-format compressed data using built-in zlib support, if available.
98 ** New option `gnutls-verify-error', if non-nil, means that Emacs
99 should reject SSL/TLS certificates that GnuTLS determines as invalid.
100 (This option defaults to nil at present, but this is expected to change
101 in a future release.)
104 ** Emacs now supports menus on text-mode terminals.
105 If the terminal supports a mouse, clicking on the menu bar, or on
106 sensitive portions of the mode line or header line, will drop down the
107 menu defined at that position. Likewise, clicking C-mouse-2 or
108 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
111 If the text terminal does not support a mouse, you can activate the
112 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
114 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
115 customize the option `tty-menu-open-use-tmm' to a non-nil value.
116 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
120 ** The *Messages* buffer is created in `messages-buffer-mode',
121 a new major mode, with read-only status. Any code that might create
122 the *Messages* buffer should call the function `messages-buffer' to do
123 so and set up the mode.
126 ** Emacs can now support ACLs (access control lists).
127 This requires a suitable support library to be found at build time.
128 On GNU/Linux, the POSIX ACL interface is used via libacl.
129 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
132 *** Emacs preserves the ACL entries of files when backing up.
134 *** New functions `file-acl' and `set-file-acl' get and set the ACL
137 ** Multi-monitor support has been added.
140 *** New functions `display-monitor-attributes-list' and
141 `frame-monitor-attributes' can be used to obtain information about
142 each physical monitor on multi-monitor setups.
144 *** The functions `display-pixel-width' and `display-pixel-height' now
145 behave consistently among the platforms: they return the pixel width
146 or height for all physical monitors associated with the given display
147 as if they were on X11. To get information for each physical
148 monitor, use the new functions above. Similar notes also apply to
149 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
150 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
153 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
154 You can change the default by customizing `blink-cursor-blinks'.
157 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
158 This affects View mode, etc.
163 *** The command `apropos-variable' is renamed to `apropos-user-option'.
164 `apropos-user-option' shows all user options while `apropos-variable'
165 shows all variables. When called with a universal prefix argument,
166 the two commands swap their behaviors. When `apropos-do-all' is
167 non-nil, they output the same results.
170 *** The key `?' now describes prefix bindings, like `C-h'.
173 *** The command `describe-function' has been extended for EIEIO.
174 Running it on constructors will show a full description of the
175 generated class. For generic functions, it will show all
176 implementations together with links to the source. The old commands
177 `describe-class', `describe-constructor' and `describe-generic' were
181 *** The function `quail-help' is no longer an interactive command.
182 Use `C-h C-\' (`describe-input-method') instead.
187 *** ImageMagick images now support the :max-width and :max-height keywords.
190 *** When using `create-image' with image data, you can pass a :format
191 attribute (via the property-list argument) in order to help
192 ImageMagick detect the image type. The value should be a MIME
193 content-type that is found in the new variable `image-format-suffixes'.
195 ** Frame and window changes
198 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
199 bound to <f11> and M-<f10>, respectively.
202 *** New hooks `focus-in-hook', `focus-out-hook'.
203 These are normal hooks run when an Emacs frame gains or loses input focus.
205 *** Emacs can now change frame sizes in units of pixels, rather than
206 text rows or columns. When maximizing a frame or making it fullscreen,
207 remaining extra pixels are no longer given to the minibuffer, the rightmost
208 fringe, or other unusable space, but are distributed among the text
209 areas of the frame's windows. If the new option `frame-resize-pixelwise'
210 is non-nil, all frame size changes happen pixelwise and set the
211 corresponding size hints for the window manager.
213 *** Emacs can now change window sizes in units of pixels.
214 Mouse-dragging a mode line or window divider now changes the size of
215 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
216 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
217 resize windows pixelwise. Most functions for changing or accessing
218 window sizes now have an additional argument that allows changes to apply,
219 or values to be returned, in pixels instead of lines/columns.
221 *** Emacs can now draw dividers between adjacent windows. To put
222 dividers between side-by-side/vertically stacked windows customize the
223 frame parameters `right-divider-width' and `bottom-divider-width' to
224 some positive integer. You can drag dividers with the mouse (they show
225 a corresponding cursor when the mouse hovers over them). You can change
226 the appearance of dividers by customizing the faces `window-divider',
227 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
228 two are useful to provide a 3D effect, or to better distinguish dividers
229 from surrounding display objects.
231 *** New functions are provided to return the pixel sizes of window
232 components, namely `window-scroll-bar-width', `window-mode-line-height'
233 `window-header-line-height', `window-right-divider-width' and
234 `window-bottom-divider-width'.
236 *** The new function `window-text-pixel-size' returns the size of the
237 text of a window's buffer in pixels. This allows functions like
238 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
239 window to its buffer as it will be displayed.
241 *** `fit-window-to-buffer' can now resize windows horizontally.
242 This behavior is controlled by the new option
243 `fit-window-to-buffer-horizontally'.
245 *** `fit-frame-to-buffer' can now fit frames in both directions.
246 This behavior is controlled by the option `fit-frame-to-buffer' which
247 tells in which direction(s) the frame shall be fit. The new options
248 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
249 control the size of the frame and its position on screen.
251 *** Temp Buffer Resize Mode can now adjust height and width of windows
252 and frames. `temp-buffer-resize-mode' is now able to adjust the height
253 and the width of a window displaying a temporary buffer. The new option
254 `temp-buffer-max-width' allows to control the width of temporary buffer
255 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
256 and the buffer appears in the root window of a frame, Temp Buffer Resize
257 Mode will try to adjust width and/or height of the frame.
260 *** `split-window' is now a non-interactive function, not a command.
261 As a command, it was a special case of `C-x 2' (`split-window-below'),
262 and as such superfluous. After being reimplemented in Lisp, its
263 interactive form was mistakenly retained.
266 *** The functions `window-size' and `window-total-size' now have an
267 optional argument to return a rounded size value.
270 *** `window-state-put' now allows to put a window state into internal
274 *** New option `scroll-bar-adjust-thumb-portion'.
275 Available only on X, this option allows to control over-scrolling
276 using the scroll bar (i.e. dragging the thumb down even when the end
277 of the buffer is visible).
280 *** New basic action function `display-buffer-in-previous-window' has
281 `display-buffer' display a buffer in a window previously showing that
285 *** New basic action function `display-buffer-at-bottom' has
286 `display-buffer' choose or make a window at the bottom of the selected
289 *** New display action function `display-buffer-no-window' to not
290 display the buffer in a window.
292 *** New display action alist entry `allow-no-window' to indicate the
293 caller of `display-buffer' is ready to handle the case of not
294 displaying the buffer in a window.
296 ** Lisp evaluation changes
298 *** `eval-defun' on an already defined defcustom calls the :set function,
302 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
303 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
304 zero prefix argument. This disables truncation of lists in the output,
305 equivalent to setting `(eval-expression-)print-length' and
306 `(eval-expression-)print-level' to nil. Additionally, it causes integers
307 to be printed in other formats (octal, hexadecimal, and character).
310 *** New hook `eval-expression-minibuffer-setup-hook' run by
311 `eval-expression' on entering the minibuffer.
314 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
317 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
318 because it affects caching of paragraph scanning results as well.
319 There is no reason to set this to nil except for debugging purposes.
322 ** The option `set-mark-default-inactive' has been deleted.
323 This unfinished feature was introduced by accident in Emacs 23.1;
324 simply disabling Transient Mark mode does the same thing.
327 ** The default value of `comment-use-global-state' is now t,
328 and this variable has been marked obsolete.
331 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
332 and works for git too, if you fetch the repository notes.
335 ** New option `load-prefer-newer' affects how the `load' function chooses
336 the file to load. If this is non-nil, then when both .el and .elc
337 versions of a file exist, and the caller did not explicitly specify
338 which one to load, then the newer file is loaded. The default, nil,
339 means to always load the .elc file.
342 * Editing Changes in Emacs 24.4
344 ** Indentation changes
347 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
348 When invoked without a prefix argument, it now activates a transient
349 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
350 the text indentation in the region. Typing any other key resumes
351 normal editing behavior.
353 *** `electric-indent-mode' is enabled by default.
356 *** `tab-stop-list' is now implicitly extended to infinity by repeating
357 the last step. Its default value is changed to nil, which means a tab
358 stop every `tab-width' columns.
361 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
362 When called in succession, it cycles between spacing conventions:
363 one space, no spaces, original spacing.
366 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
367 a line after a one-letter word, which is an error in some typographical
368 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
371 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
373 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
374 Most commands are still unaware of it, but kill/yank do work on the rectangle.
377 ** New option `visual-order-cursor-movement'.
378 If this is non-nil, cursor motion with arrow keys will follow the
379 visual order of characters on the screen: <left> always moves to the
380 left, <right> always moves to the right, disregarding the surrounding
381 bidirectional context.
386 *** All interactive commands that read a register (`copy-to-register', etc.)
387 now display a temporary window after `register-preview-delay' seconds
388 that summarizes existing registers. To disable this, set that option to nil.
389 Interactive commands that read registers and want to make use of this
390 should use `register-read-with-preview' to read register names.
393 *** New command `frameset-to-register' bound to `C-x r f', replacing
394 `frame-configuration-to-register'. It offers similar functionality,
395 plus enhancements like the ability to restore deleted frames.
396 (`frame-configuration-to-register' still exists, but no longer has a
400 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
404 ** New command `delete-duplicate-lines'.
405 This searches the region for identical lines, and removes all but one
406 copy of each repeated line. The lines need not be sorted.
409 * Changes in Specialized Modes and Packages in Emacs 24.4
412 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
414 ~/.emacs.d/timelog replaces ~/.timelog
415 ~/.emacs.d/vip replaces ~/.vip
416 ~/.emacs.d/viper replaces ~/.viper
417 ~/.emacs.d/ido.last replaces ~/.ido.last
418 ~/.emacs.d/kkcrc replaces ~/.kkcrc
419 ~/.emacs.d/quickurls replaces ~/.quickurls
420 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
421 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
422 ~/.emacs.d/places replaces ~/.emacs-places
423 ~/.emacs.d/shadows replaces ~/.shadows
424 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
425 ~/.emacs.d/strokes replaces ~/.strokes
426 ~/.emacs.d/notes replaces ~/.notes
427 ~/.emacs.d/type-break replaces ~/.type-break
428 Also the following files used by the now obsolete otodo-mode.el:
429 ~/.emacs.d/todo-do replaces ~/.todo-do
430 ~/.emacs.d/todo-done replaces ~/.todo-done
431 ~/.emacs.d/todo-top replaces ~/.todo-top
433 ** Backtrace and debugger
436 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
437 display of local variables of the current stack frame.
440 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
441 the lexical environment when evaluating the code in the context at point
442 (and so allows you to access lexical variables).
445 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
448 ** Battery information can now be retrieved from BSD's `apm' utility.
451 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
453 ** Calendar and Diary
456 *** New faces `calendar-weekday-header', `calendar-weekend-header',
457 and `calendar-month-header'.
460 *** New option `calendar-day-header-array'.
463 *** New variable `diary-from-outlook-function', used by the command
464 `diary-from-outlook'.
467 *** The variable `calendar-font-lock-keywords' is obsolete.
472 *** Calc by default now uses the Gregorian calendar for all dates, and
473 uses January 1, 1 AD as its day number 1. Previously Calc used the
474 Julian calendar for dates before September 14, 1752, and it used
475 December 31, 1 BC as its day number 1; the new scheme is more
476 consistent with Calendar's calendrical system and day numbering.
479 *** The new option `calc-gregorian-switch' lets you configure if
480 (and when) Calc switches from the Julian to the Gregorian calendar.
483 *** Support for ISO 8601 dates.
489 **** The cpp-root project now supports executing a compile command.
490 It can be set through the new :compile-command slot or the
491 buffer-local variable `compile-command'.
493 **** Better selection of include directories for the 'linux' project.
494 Include directories now support out-of-tree build directories and
495 target architecture auto-detection.
499 **** Improved detection of used namespaces in current scope in C++.
501 **** Parsing of default values for variables and function arguments in C/C++.
502 They are also displayed by the summarize feature in the mode line.
504 **** Improved parsing of function pointers in C/C++.
505 This also includes parsing of function pointers as function arguments.
507 **** Parsing of C/C++ preprocessor macros that open new scope.
508 For example, this enables parsing of macros that open new namespaces.
510 **** Support for 'this' pointer in inline member functions in C++.
515 *** New macro `cl-tagbody'.
516 This executes statements while allowing for control transfer to labels.
519 *** letf is now just an alias for cl-letf.
524 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
525 Hence, you can now enable it independently from those modes, and from
526 `transient-mark-mode'.
529 *** `cua-highlight-region-shift-only' is now obsolete.
530 You can disable `transient-mark-mode' to get the same result.
533 *** CUA's rectangles can now be used without CUA by calling the command
534 `cua-rectangle-mark-mode'.
539 *** Support for completion, ElDoc, and Flycheck has been added.
542 *** The current CFEngine syntax is parsed from "cf-promises -s json".
543 There is a fallback syntax available if you don't have cf-promises or
544 if your version doesn't support that option. See option `cfengine-cf-promises'.
547 ** Delete Selection mode can now be used without Transient Mark mode.
552 *** `desktop-save-mode' by default now auto-saves an existing desktop file
553 after `desktop-auto-save-timeout'. To disable this, customize that option
557 *** `desktop-restore-frames', enabled by default, allows saving and
558 restoring the frame/window configuration (frameset). Additional options
559 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
560 and `desktop-restore-forces-onscreen' offer further customization.
563 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
564 such as file ownership or permissions, are visible.
567 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
568 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
569 The results display in the mode line.
571 ** Electric Pair mode
574 *** New option `electric-pair-preserve-balance', enabled by default.
575 If non-nil, pairing/skipping only kicks in when that help the balance
576 of parentheses and quotes, i.e. the buffer should end up at least as
579 You can further control this behavior by adjusting the predicates
580 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
583 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
584 In `electric-pair-mode', the commands `backward-delete-char' and
585 `backward-delete-char-untabify' are now bound to electric variants
586 that delete the closer when invoked between adjacent pairs.
589 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
590 In `electric-pair-mode', inserting a newline between adjacent pairs
591 opens an extra newline after point, which is indented if
592 `electric-indent-mode' is also set.
595 *** New option `electric-pair-skip-whitespace', enabled by default.
596 This controls if skipping over closing delimiters should jump over any
597 whitespace slack. Setting it to `chomp' makes it delete this
598 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
601 *** New variables control the pairing in strings and comments.
602 You can customize `electric-pair-text-pairs' and
603 `electric-pair-text-syntax-table' to tweak pairing behavior inside
604 strings and comments.
607 ** New EPA option `epa-mail-aliases'.
608 You can set this to a list of email address aliases that `epa-mail-encrypt'
609 should use to find keys.
612 ** New ERC option `erc-accidental-paste-threshold-seconds'.
613 If set to a number, this can be used to avoid accidentally pasting large
614 amounts of data into the ERC input.
617 ** New ERT macro `skip-unless' allows skipping ERT tests.
618 See the ERT manual for details.
623 *** `eshell' now supports visual subcommands and options.
624 Eshell has been able to handle "visual" commands (interactive,
625 non-line oriented commands such as top that require display
626 capabilities not provided by eshell) by running them in an Emacs
627 terminal emulator. See `eshell-visual-commands'.
629 This feature has been extended to subcommands and options that make a
630 usually line-oriented command a visual command. Typical examples are
631 "git log" and "git <command> --help", which display their output in a
632 pager by default. See `eshell-visual-subcommands' and
633 `eshell-visual-options'.
636 *** New Eshell-Tramp module.
637 External su and sudo commands are now the default; the internal,
638 Tramp-using variants can still be used by enabling the eshell-tramp
642 ** New F90 mode option `f90-smart-end-names'.
645 Icomplete is now more similar to Ido.
648 *** Icomplete by default now applies to all forms of minibuffer completion.
649 The variable `icomplete-with-completion-tables' (now a user option)
650 controls this. To restore the old behavior, set it back to
651 '(internal-complete-buffer).
654 *** You can navigate through and select completions using the keys
655 from `icomplete-minibuffer-map'.
658 *** The string that separates potential completions is now a customizable
659 option (`icomplete-separator'). The default is " | " rather than ",".
662 *** New face `icomplete-first-match'; and new options
663 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
666 *** The option `icomplete-show-key-bindings' has been removed.
671 *** An Ido user manual is now included.
674 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
675 This means to use virtual buffers if the current ido input does not match
679 *** The variable `ido-decorations' can optionally have two new elements,
680 which are the brackets to use around the sole remaining completion.
685 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
686 visit the next image file and the previous image file in the same
687 directory, respectively.
690 *** New commands to show specific frames of multi-frame images.
691 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
692 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
695 *** New commands to speed up, slow down, or reverse animation.
696 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
697 speed up and slow down the animation. `a r' (`image-reverse-speed')
698 to reverse it and `a 0' (`image-reset-speed') to reset it.
701 *** The command `image-mode-fit-frame' deletes other windows.
702 When toggling, it restores the frame's previous window configuration.
703 It also has an optional frame argument, which can be used by Lisp
704 callers to fit the image to a frame other than the selected frame.
709 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
710 the symbol found near point.
713 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
714 will cycle through faces in `hi-lock-face-defaults' without prompting.
717 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
722 *** New Info face `info-index-match', used to highlight matches in index
723 entries displayed by `Info-index-next', `Info-virtual-index' and
727 *** The Info-edit command is obsolete. Editing Info nodes by hand
728 has not been relevant for some time.
733 *** New option `js-switch-indent-offset'.
736 *** Better indentation of multiple-variable declarations.
737 If a declaration spans several lines, variables on the following lines
738 are lined up to the first one.
741 *** Recognition and better indentation of continuations in array comprehensions.
744 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
749 *** Font locking for Texinfo comments and new keywords.
751 *** Completion in Octave file buffers.
755 *** Jump to definition.
757 *** Documentation lookup/search.
760 ** OPascal mode is the new name for Delphi mode
763 *** All delphi-* variables and functions have been renamed to opascal-*.
764 Obsolete aliases exist for those likely to have been used externally.
767 *** The option `delphi-newline-always-indents' has been removed.
768 Use `electric-indent-mode' instead.
771 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
776 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
777 to filter the list of packages by a keyword.
780 *** In the `describe-package' buffer, there are now buttons listing the
781 keywords related to the package. Click on a button to see other packages
782 related to that keyword.
785 *** The format of `archive-contents' files, generated by package
786 repositories, has changed to allow a new (fifth) element in the data
787 vectors, containing an associative list with extra properties.
788 (For example, `describe-package' uses the `:url' extra property to
789 display a "Homepage" header.)
792 ** In Prolog mode, `prolog-use-smie' has been removed,
793 along with the non-SMIE indentation code.
798 *** The new command `remember-notes' creates a buffer that is saved on exit.
799 You can use it as a more permanent *scratch* buffer.
802 *** Remember can now store notes in separate files.
803 To use this, add `remember-store-in-files' to the `remember-handler-functions'
804 option. The files are saved in `remember-data-directory' using
805 names specified by `remember-directory-file-name-format'.
810 *** Customize `rmail-mbox-format' to influence some minor aspects of
811 how Rmail displays non-MIME messages.
814 *** The `unrmail' command now converts from BABYL to mboxrd format,
815 rather than mboxo. Customize `unrmail-mbox-format' to change this.
820 *** Improved syntax highlighting and indentation.
823 *** New `electric-indent-mode' integration.
826 *** New option `ruby-encoding-magic-comment-style'.
829 *** New option `ruby-custom-encoding-magic-comment-template'.
832 *** New option `ruby-align-to-stmt-keywords'.
835 *** New option `ruby-align-chained-calls'.
838 *** More Ruby file types have been added to `auto-mode-alist'.
840 ** Search and Replace
843 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
844 starts a symbol (identifier) incremental search forward with the
845 symbol found near point added to the search string initially.
848 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
849 and adds it to the search string.
852 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
855 *** `query-replace' skips invisible text when `search-invisible' is nil,
856 and opens overlays with hidden text when `search-invisible' is `open'.
859 *** A negative prefix arg of replacement commands replaces backward.
860 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
861 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
864 *** By default, prefix arguments do not now terminate Isearch mode.
865 Set `isearch-allow-prefix' to nil to restore old behavior.
868 *** More Isearch commands accept prefix arguments, namely
869 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
873 *** Word search now matches whitespace at the beginning/end
874 of the search string if it contains leading/trailing whitespace.
875 In an incremental word search or when using a non-nil LAX argument
876 of `word-search-regexp', the lax matching can also match part of
877 the first word (in addition to the lax matching of the last word).
878 The same rules are now applied to the symbol search with the difference
879 that it matches symbols, and non-symbol characters between symbols.
882 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
885 ** The shell.el option `explicit-bash-args' includes --noediting by default.
886 All non-ancient Bash versions support this option.
891 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
894 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
896 ** SMIE indentation can be customized via `smie-config'.
897 Emacs can learn the appropriate indentation settings if you provide it
898 with an indented sample file.
903 *** Improved login monitoring and appropriate response to login failures.
904 New variable `sql-login-delay' defines maximum wait time for a connection.
907 SQL*Plus script placeholders are properly highlighted and identified
908 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
909 are passed before the logon parameter, as required. The default now
910 includes `-L', to limit the number of logon attempts per invocation.
913 ** New Term mode option `term-suppress-hard-newline'.
916 ** Todo mode has been rewritten and enhanced.
917 The Todo mode user manual describes all commands and most user
918 options. To support some of these features, a new file format is
919 used, which is incompatible with the old format; however, you can
920 convert old todo and done item files to the new format on initializing
921 the first new todo file, or at any later time with the provided
922 conversion command. The previous version of todo-mode.el has been
923 renamed to otodo-mode.el and is now obsolete. New features include:
925 *** Support for multiple todo files and archive files of done items.
927 *** Renaming, reordering, moving, merging, and deleting categories.
929 *** Sortable tabular summaries of categories and the item types they contain.
931 *** Cross-category lists of items filtered by specific criteria.
933 *** More fine-grained interaction with the Emacs diary, by being able to
934 decide for each todo item whether it appears in the Fancy Diary display.
936 *** Highly flexible new item insertion and item editing.
938 *** Moving items between categories, storing done items in their category
939 or in archive files, undoing or unarchiving done items.
941 *** Reprioritizing items by inputting a numerical priority.
943 *** Extensive customizability of operation and display, including many faces.
948 *** `trace-function' and `trace-function-background' no longer prompt for
949 the output buffer. Unless you use a prefix argument, they output to
953 *** With a prefix argument, `trace-function' and `trace-function-background'
954 will prompt for a "context". This is a Lisp expression, whose value at the
955 time the function is entered/exited is printed along with the function's
961 *** The experimental url syntax for remote file names has been removed.
964 *** New connection method "adb", which allows to access Android
965 devices by the Android Debug Bridge. The variable `tramp-adb-program'
966 can be used to adapt the path of the "adb" program, if needed.
969 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
970 "scpc" and "rsyncc" are discontinued. The ssh option
971 "ControlMaster=auto" is set automatically in all ssh-based methods,
972 when possible. See `tramp-use-ssh-controlmaster-options'.
975 *** Handlers for `file-acl' and `set-file-acl' for remote machines
976 which support POSIX ACLs.
979 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
980 for remote machines which support filesystem notifications.
983 ** New URL command `url-cookie-list' displays the current cookies,
984 and allows you to interactively remove cookies.
986 ** VC and related modes
989 *** In VC directory mode, `D' displays diffs between VC-controlled
990 whole tree revisions.
993 *** In VC directory mode, `L' lists the change log for the current VC
994 controlled tree in a window.
997 *** In VC directory mode, `I' shows a log of changes that will be
998 received with a pull operation.
1001 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1002 under current version control system. When called with a prefix
1003 argument, you can remove a file from the ignored file list.
1008 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1011 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1014 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1015 are obsolete. Customize the `woman-*' faces instead.
1017 ** Obsolete packages
1020 *** iswitchb.el; use icomplete-mode.
1023 *** longlines.el; use visual-line-mode.
1032 *** terminal.el; use term.el instead.
1035 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1038 *** xesam.el (owing to the cancellation of the XESAM project).
1041 *** yow.el; use fortune.el or cookie1.el instead.
1044 * New Modes and Packages in Emacs 24.4
1047 ** New package `eww' is a built-in web browser.
1048 It is only available if Emacs is compiled with libxml2 support.
1051 ** New minor mode `superword-mode'.
1052 This overrides the default word motion commands to treat "symbol_words"
1053 as a single word, similar to what `subword-mode' does.
1056 ** New package nadvice.el offers lighter-weight advice facilities.
1059 *** add-function/remove-function, which can be used to add/remove code on any
1060 function-carrying place, such as process-filters or `<foo>-function' hooks.
1062 *** advice-add/advice-remove to add/remove a piece of advice on a named
1063 function, much like `defadvice' does.
1065 ** New package frameset.el.
1066 It provides a set of operations to save a frameset (the state of all
1067 or a subset of the existing frames and windows, somewhat similar to a
1068 frame configuration), both in-session and persistently, and restore it
1069 at some point in the future.
1072 ** New package filenotify.el provides an interface for file system
1073 notifications. It requires that Emacs be compiled with one of the
1074 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1077 * Incompatible Lisp Changes in Emacs 24.4
1080 ** `kill-region' has lost its `yank-handler' optional argument.
1083 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1084 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1087 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1090 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1091 Some languages match those as »...«, and others as «...», so it is
1092 better for Emacs to stay neutral by default.
1095 ** In compiled Lisp files, the header no longer includes a timestamp.
1098 ** The default file coding for Emacs Lisp files is now utf-8.
1099 (See `file-coding-system-alist'.) In most cases, this change is
1100 transparent, but files that contain unusual characters without
1101 specifying an explicit coding system may fail to load with obscure
1102 errors. You should either convert them to utf-8 or add an explicit
1106 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1107 It used to disable the minor mode, major mode, and text-property keymaps,
1108 whereas now it simply has higher precedence.
1111 ** Default process filters and sentinels are not nil any more.
1112 Instead they default to a function that does what the nil value used to do.
1115 ** `read-event' does not return decoded chars in ttys any more.
1116 As was the case in Emacs 22 and before, the decoding of terminal
1117 input, according to `keyboard-coding-system', is not performed in
1118 `read-event' any more. But unlike in Emacs 22, this decoding is still
1119 done before input-decode-map, function-key-map, etc.
1122 ** The option `inhibit-local-menu-bar-menus' has been removed.
1125 ** Frame-local variables that affect redisplay do not work any more.
1126 More specifically, redisplay does not bother to check for a frame-local
1127 value when looking up variables.
1130 ** nil and "unbound" are indistinguishable in `symbol-function'.
1131 `symbol-function' does not signal a `void-function' error any more.
1132 To determine if a symbol's function definition is void, use `fboundp'.
1135 ** `defadvice' does not honor the `freeze' flag and cannot advise
1136 special-forms any more.
1139 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1140 when lexical binding is enabled. Previously, VAR was bound to nil,
1141 which often led to spurious unused-variable warnings.
1144 ** The return value of `backup-buffer' has changed.
1145 The second argument is no longer an SELinux context, instead it is an
1146 alist of extended attributes as returned by the new function
1147 `file-extended-attributes'. The attributes can be applied to another
1148 file using `set-file-extended-attributes'.
1151 ** By default `copy-file' no longer copies file permission bits to an
1152 existing destination; and it sets the file permission bits of a newly
1153 created destination to those of the source, masked by the default file
1154 permissions. To copy the file permission bits, pass t as the
1155 PRESERVE-PERMISSIONS argument of `copy-file'.
1158 ** `visited-file-modtime' now returns -1 for nonexistent files.
1159 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1160 in the presence of files with negative time stamps.
1163 ** The cars of the elements in `interpreter-mode-alist' are now
1164 treated as regexps rather than literal strings.
1167 * Lisp Changes in Emacs 24.4
1170 ** The second argument of `eval' can now specify a lexical environment.
1173 ** New functions `special-form-p' and `macrop'.
1176 ** New macro `define-alternatives' can be used to define generic commands.
1177 Generic commands are interactive functions whose implementation can be
1178 selected among several alternatives, as a matter of user preference.
1181 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1182 on that symbol will use the associated value as a function to call
1186 ** New variable `enable-dir-local-variables'.
1187 Directory-local variables are ignored if this is nil. This may be
1188 useful for modes that want to ignore directory-locals while still
1189 respecting file-local variables.
1192 ** New function `get-pos-property'.
1195 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1196 as a function to call to provide default values.
1198 ** Completion changes
1201 *** The separator used by `completing-read-multiple' is now a regexp.
1202 The default `crm-separator' has been changed to allow surrounding spaces
1206 *** The `common-substring' argument of `display-completion-list',
1207 which has been documented as obsolete since Emacs 23.1, is now _really_
1208 obsolete, and no longer advertised. Instead either call
1209 `completion-hilit-commonality' to add the highlighting; or use
1210 `completion-all-completions', which returns highlighted strings.
1213 *** New function `completion-table-with-cache' is a wrapper for
1214 `completion-table-dynamic' that caches the result of the last lookup.
1217 *** New function `completion-table-merge' to combine several
1218 completion tables by merging their completions.
1221 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1222 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1223 this replaces the string "lambda" with the Greek lambda character.
1228 *** Functions to pop up menus and dialogs now work on all terminals,
1229 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1230 `message-box', `yes-or-no-p', etc.
1232 The function `display-popup-menus-p' will now return non-nil for a
1233 display or frame whenever a mouse is supported on that display or
1237 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1240 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1241 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1243 ** New hook `pre-redisplay-function'.
1246 ** New bool-vector set operation functions
1247 *** `bool-vector-exclusive-or'
1248 *** `bool-vector-union'
1249 *** `bool-vector-intersection'
1250 *** `bool-vector-set-difference'
1251 *** `bool-vector-not'
1252 *** `bool-vector-subsetp'
1253 *** `bool-vector-count-consecutive'
1254 *** `bool-vector-count-population'
1257 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1259 ** Error-handling changes
1262 *** New function `define-error'.
1265 *** `with-demoted-errors' takes an additional argument `format'.
1268 ** New macro `with-eval-after-load'.
1269 This is like the old `eval-after-load', but better behaved.
1272 ** New library subr-x.el with miscellaneous small utility functions
1273 *** `hash-table-keys'
1274 *** `hash-table-values'
1275 *** `string-blank-p'
1276 *** `string-empty-p'
1278 *** `string-reverse'
1279 *** `string-trim-left'
1280 *** `string-trim-right'
1282 *** `string-remove-prefix'
1283 *** `string-remove-suffix'
1286 ** Obsoleted functions
1289 *** `lisp-complete-symbol'
1290 *** `field-complete'
1291 *** `minibuffer-completion-contents'
1292 *** `isearch-nonincremental-exit-minibuffer'
1293 *** `isearch-filter-visible'
1294 *** `generic-make-keywords-list'
1295 *** `get-upcase-table' (use `case-table-get-table' instead).
1297 ** `with-wrapper-hook' is obsoleted by `add-function'.
1298 The few hooks that used with-wrapper-hook are replaced as follows:
1299 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1300 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1301 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1304 ** `byte-compile-interactive-only-functions' is now obsolete.
1305 To specify that a command should only be called interactively, give it
1306 a non-nil `interactive-only' property.
1309 ** `split-string' now takes an optional argument TRIM.
1310 The value, if non-nil, is a regexp that specifies what to trim from
1311 the start and end of each substring.
1314 ** New function `string-suffix-p'.
1316 ** File-handling changes
1319 *** Support for filesystem notifications.
1320 Emacs now supports notifications of filesystem changes, such as
1321 creation, modification, and deletion of files. This requires the
1322 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1323 MS-Windows systems, this is supported for Windows XP and newer
1327 *** The 9th element returned by `file-attributes' is now unspecified.
1328 Formerly, it was t if the file's gid would change if file were deleted
1329 and recreated. This value has been inaccurate for years on many
1330 platforms, and nobody seems to have noticed or cared.
1333 *** The 6th argument to `copy-file' has been renamed to
1334 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1335 Unix file permission bits as well as SELinux context.
1338 *** The function `file-ownership-preserved-p' now has an optional
1339 argument GROUP which causes it check for file group too. This can be
1340 used in place of the 9th element of `file-attributes'.
1343 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1344 argument, with the same interpretation as the returned value of
1345 `visited-file-modtime'.
1347 ** Autorevert changes
1350 *** If Emacs is compiled with file notification support, notifications
1351 are used instead of checking the time stamp of the files. You can
1352 disable this by setting the user option `auto-revert-use-notify' to
1353 nil. Alternatively, a regular expression of directories to be
1354 excluded from file notifications can be specified by
1355 `auto-revert-notify-exclude-dir-regexp'.
1358 *** The new user option `auto-revert-remote-files' enables reversion
1359 of remote files when set to non-nil.
1364 *** The function `face-spec-set' is now like `setq' for face specs.
1365 Its third arg now accepts values specifying a face spec type (defface,
1366 custom, or override spec), and the relevant spec is set accordingly.
1369 *** New function `add-face-text-property', which can be used to
1370 conveniently prepend/append new face properties.
1372 *** Face specs set via Custom themes now replace the `defface' spec
1373 rather than inheriting from it (as do face specs set via Customize).
1376 *** New face characteristic (supports :underline (:style wave))
1377 specifies whether or not the terminal can display a wavy line.
1380 *** New face spec attribute :distant-foreground
1381 specifies foreground to use if background color is near the foreground
1382 color that would otherwise have been used.
1387 *** `image-animated-p' is now `image-multi-frame-p'.
1388 It returns non-nil for any image that contains multiple frames,
1389 whether or not it specifies a frame delay.
1392 *** New variable `image-default-frame-delay' gives the frame delay for
1393 animated images which do not specify a frame delay.
1396 *** New functions `image-current-frame' and `image-show-frame' for getting
1397 and setting the current frame of a multi-frame image.
1402 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1403 **** object-name -> eieio-object-name
1404 **** object-class -> eieio-object-class
1405 **** object-class-fast -> eieio--object-class
1406 **** object-class-name -> eieio-object-class-name
1407 **** object-name-string -> eieio-object-name-string
1408 **** object-num-slots -> eieio--object-num-slots
1409 **** object-set-name-string -> eieio-object-set-name-string
1410 **** class-of -> eieio-object-class
1411 **** class-name -> eieio-class-name
1412 **** class-parent -> eieio-class-parent
1413 **** class-parents -> eieio-class-parents
1414 **** class-parents-fast -> eieio-class-parents-fast
1415 **** class-children -> eieio-class-children
1416 **** class-num-slots -> eieio--class-num-slots
1417 **** class-precedence-list -> eieio-class-precedence-list
1418 **** class-direct-subclasses -> eieio-class-children
1419 **** class-direct-superclasses -> eieio-class-parents
1421 ** Changes in encoding and decoding of text
1424 *** New coding-system `prefer-utf-8'.
1425 This is like `undecided' but prefers UTF-8 on decoding if the text to
1426 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1427 any non-ASCII characters are automatically encoded as UTF-8.
1430 *** New attributes of coding-systems whose type is `undecided'.
1431 Two new attributes, `:inhibit-null-byte-detection' and
1432 `:inhibit-iso-escape-detection', determine how to detect encoding of
1433 text that includes null bytes and ISO-2022 escape sequences,
1434 respectively. Each of these attributes can be either nil, zero, or
1435 t. If it is t, decoding text ignores null bytes and, respectively,
1436 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1437 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1438 text is encoded in one of the ISO-2022 encodings, such as
1439 iso-2022-7bit. If the value is zero, Emacs consults the variables
1440 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1442 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1443 UTF-8 encoding and decoding, whenever possible.
1445 These attributes are only meaningful for coding-systems of type
1446 `undecided'. (The type of a coding-system is determined by its
1447 `:coding-type' attribute and can be accessed by calling the
1448 `coding-system-type' function.)
1451 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1454 ** New functions `group-gid' and `group-real-gid'.
1457 ** The spelling of the rx.el category `chinese-two-byte' has been
1458 corrected (the first 'e' was missing).
1461 ** Minor internal changes to the details of lock files.
1462 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1463 If DIR/.#FILE already exists and is not an Emacs lock file,
1464 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1465 numbered lock files DIR/.#FILE.0...).
1466 On file systems that do not support symbolic links, the lock is now a
1467 regular file with contents being what would have been in the symlink.
1469 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1472 *** The package descriptor and name of global variables, constants,
1473 and functions should be separated by two hyphens if the symbol is not
1474 meant to be used by other packages.
1477 * Changes in Emacs 24.4 on Non-Free Operating Systems
1480 ** The procedure for building Emacs on MS-Windows has changed.
1481 It is now built by running the same configure script as on all other
1482 platforms. This requires the MSYS environment and MinGW development
1483 tools. See the updated instructions in nt/INSTALL for details.
1485 Using the Posix configure script and Makefile's also means a change in
1486 the directory structure of the Emacs installation on Windows. It is
1487 now the same as on GNU and Unix systems. In particular, the auxiliary
1488 programs, such as cmdproxy.exe and hexl.exe, are in
1489 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1490 version), version-independent site-lisp is in share/emacs/site-lisp,
1491 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1492 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1493 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1494 directories and will find the files in there automatically; there's no
1495 need to set any variables due to this change.)
1498 ** Emacs on Windows 2000 and later can now access files and directories
1499 whose names cannot be encoded in the current system codepage.
1501 The new variable `w32-unicode-filenames' controls this feature: if it
1502 is t, Emacs uses Unicode APIs to pass file names to system calls,
1503 which lifts the limitation of file names to the current locale.
1506 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1507 The backtrace is written to the 'emacs_backtrace.txt' file in the
1508 directory where Emacs was running.
1511 ** The variable `buffer-file-type' is no longer supported.
1512 Setting it has no effect, and %t in the mode-line format is ignored.
1513 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1514 modifying it has no effect.
1517 ** Lock files now work on MS-Windows.
1518 This helps to prevent losing your edits if the same file is being
1519 edited in another Emacs session or by another user. See the node
1520 "Interlocking" in the Emacs User Manual for the details. To disable
1521 file locking, customize `create-lockfiles' to nil.
1523 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1524 GNUstep and Mac OS X 10.4 use the old font backend.
1525 To use the old backend by default, do on the command line:
1526 % defaults write org.gnu.Emacs FontBackend ns
1528 ** Improved fullscreen support on Mac OS X.
1529 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1530 Customize `ns-use-native-fullscreen' to change the style.
1531 For Mac OS X 10.7 and newer, native is the default.
1533 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1534 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1535 does not apply to images.
1538 * Installation Changes in Emacs 24.3
1540 ** The default X toolkit is now Gtk+ version 3.
1541 If you don't pass `--with-x-toolkit' to configure, or if you use
1542 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1543 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1544 You can explicitly require a specific version by passing
1545 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1547 ** New configure option `--enable-link-time-optimization', to utilize
1548 an appropriate feature provided by GCC since version 4.5.0.
1550 ** New configure option `--without-all' to disable most of the optional
1551 features (image support, etc.) that are normally enabled by default.
1553 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1554 Emacs). If building with GCC, this enables compile-time checks that
1555 warn/give errors about possibly-questionable C code. On a recent GNU
1556 system there should be no warnings; on older and on non-GNU systems
1557 the results may be useful to developers.
1559 ** The configure option `--enable-use-lisp-union-type' has been
1560 renamed to `--enable-check-lisp-object-type', as the resulting
1561 Lisp_Object type no longer uses a union to implement the compile time
1562 check that this option enables.
1564 ** The configure option `--disable-maintainer-mode' has been removed,
1565 as it was confusingly-named and rarely useful.
1567 ** The configure options `--program-prefix', `--program-suffix', and
1568 `--program-transform-name' apply to more than just the installed
1569 binaries. Now they also affect the man pages, icons, and the
1570 etc/emacs.desktop file; but not the info pages, since this would break
1571 links between the various manuals.
1573 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1574 overwriting "emacs" in the installation bin/ directory with a link
1577 ** Emacs uses libtinfo in preference to libncurses, if available.
1579 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1580 /usr/pkg/lib to the linker search path. You must add them yourself if
1583 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1584 (from the bin and libexec directories, respectively). The former is
1585 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1588 * Startup Changes in Emacs 24.3
1590 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1591 lisp/ directory. There should not be any there anyway. If you have
1592 been adding them there, put them somewhere else; e.g., site-lisp.
1594 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1597 * Changes in Emacs 24.3
1601 *** `C-h f' (`describe-function') can now perform autoloading.
1602 When this command is called for an autoloaded function whose docstring
1603 contains a key substitution construct, that function's library is
1604 automatically loaded, so that the documentation can be shown
1605 correctly. To disable this, set `help-enable-auto-load' to nil.
1607 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1608 even after their associated libraries have been loaded (and the
1609 autoloads have been redefined as functions).
1613 *** Images displayed via ImageMagick now support transparency and the
1614 :background image specification property.
1616 *** When available, ImageMagick support is automatically enabled.
1617 It is no longer necessary to call `imagemagick-register-types'
1618 explicitly to install ImageMagick image types; that function is called
1619 automatically at startup, or when customizing an imagemagick- option.
1621 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1622 ImageMagick to view images. (You must call `imagemagick-register-types'
1623 afterwards if you do not use customize to change this.)
1625 *** The new variable `imagemagick-enabled-types' also affects which
1626 ImageMagick types are treated as images. The function
1627 `imagemagick-filter-types' returns the list of types that will be
1632 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1633 next and previous path separator, respectively.
1635 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1636 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1637 non-nil before enabling the mode.
1641 *** New option `mode-line-default-help-echo' specifies the help text
1642 (shown in a tooltip or in the echo area) for any part of the mode line
1643 that does not have its own specialized help text.
1645 *** You can now click mouse-3 in the coding system indicator to invoke
1646 `set-buffer-file-coding-system'.
1648 ** Server and client
1650 *** emacsclient now obeys string values for `initial-buffer-choice',
1651 if it is told to open a new frame without specifying any file to visit
1652 or expression to evaluate.
1654 *** New option `server-auth-key' specifies a shared server key.
1656 ** Emacs now generates backtraces on fatal errors.
1657 On encountering a fatal error, Emacs now outputs a textual description
1658 of the fatal signal, and a short backtrace on platforms like glibc
1659 that support backtraces.
1661 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1662 This minor mode replaces `toggle-read-only', which is now obsolete.
1664 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1665 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1666 respectively, without exiting from the prompt.
1668 ** In the Package Menu, newly-available packages are listed as "new",
1669 and sorted above the other "available" packages by default.
1671 ** If your Emacs was built from a repository checkout, the new variable
1672 `emacs-bzr-version' contains information about the bzr revision used.
1674 ** New option `create-lockfiles' specifies usage of lockfiles.
1675 It defaults to t. Changing it to nil inhibits the creation of lock
1676 files (use this with caution).
1678 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1679 variables on remote hosts.
1681 ** The entry for PCL-CVS has been removed from the Tools menu.
1682 The PCL-CVS commands are still available via the keyboard.
1684 ** Using "unibyte: t" in Lisp source files is obsolete.
1685 Use "coding: raw-text" instead.
1687 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1688 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1689 The previous binding, introduced in Emacs 24.1, was a mistake, because
1690 `C-c LETTER' bindings are reserved for user customizations.
1692 ** Internationalization
1694 *** New language environment: Persian.
1696 *** New input method `vietnamese-vni'.
1698 ** Nextstep (GNUstep / Mac OS X) port
1700 *** Support for fullscreen and the frame parameter fullscreen.
1702 *** A file dialog is used for open/save operations initiated from the
1706 * Editing Changes in Emacs 24.3
1708 ** Search and Replace
1710 *** Non-regexp Isearch now performs "lax" space matching.
1711 Each sequence of spaces in the supplied search string may match any
1712 sequence of one or more whitespace characters, as specified by the
1713 variable `search-whitespace-regexp'. (This variable is also used by a
1714 similar existing feature for regexp Isearch.)
1716 *** New Isearch command `M-s SPC' toggles lax space matching.
1717 This applies to both ordinary and regexp Isearch.
1719 *** New option `replace-lax-whitespace'.
1720 If non-nil, `query-replace' uses flexible whitespace matching too.
1723 *** Global `M-s _' starts a symbol (identifier) incremental search,
1724 and `M-s _' in Isearch toggles symbol search mode.
1725 `M-s c' in Isearch toggles search case-sensitivity.
1727 ** Navigation commands
1729 *** New binding `M-g c' for `goto-char'.
1731 *** New binding `M-g TAB' for `move-to-column'.
1733 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1734 interactively with no prefix arg. Previously, it moved to column 1.
1736 ** New option `yank-handled-properties' allows processing of text
1737 properties on yanked text, in ways that are more general than just
1738 removing them (as is done by `yank-excluded-properties').
1740 ** New option `delete-trailing-lines' specifies whether
1741 M-x delete-trailing-whitespace should delete trailing lines at the end
1742 of the buffer. It defaults to t.
1744 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1746 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1747 `ucs-insert' is now an obsolete alias for `insert-char'.
1749 ** The `z' key no longer has a binding in most special modes.
1750 It used to be bound to `kill-this-buffer', but `z' is too easy to
1753 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1754 It copies the region-rectangle as the last rectangle kill.
1758 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1760 *** New option `register-separator' specifies the register containing
1761 the text to put between collected texts for use with
1762 M-x append-to-register and M-x prepend-to-register.
1765 * Changes in Specialized Modes and Packages in Emacs 24.3
1767 ** Common Lisp emulation (CL)
1769 *** CL's main entry is now (require 'cl-lib).
1770 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1771 i.e., all its definitions have the "cl-" prefix (and internal definitions
1772 use the "cl--" prefix).
1774 If `cl' provided a feature under the name `foo', then `cl-lib'
1775 provides it under the name `cl-foo' instead; with the exceptions of the
1776 few `cl' definitions that had to use `foo*' to avoid conflicts with
1777 pre-existing Elisp entities. These have been renamed to `cl-foo'
1778 rather than `cl-foo*'.
1780 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1781 provide the old, non-prefixed names. Some exceptions are listed below:
1783 *** `cl-flet' is not like `flet' (which is deprecated).
1784 Instead it obeys the behavior of Common-Lisp's `flet'.
1785 In particular, in cl-flet function definitions are lexically scoped,
1786 whereas in flet the scoping is dynamic.
1788 *** `cl-labels' is slightly different from `labels'.
1789 The difference is that it relies on the `lexical-binding' machinery
1790 (as opposed to the `lexical-let' machinery used previously) to capture
1791 definitions in closures, so such closures will only work if `lexical-binding'
1794 *** `cl-letf' is not exactly like `letf'.
1795 The only difference is in details that relate to some deprecated usage
1796 of `symbol-function' in place forms.
1798 *** `progv' was rewritten to use the `let' machinery.
1799 A side effect is that variables without corresponding values are bound
1800 to nil rather than being made unbound.
1802 *** The following methods of extending `setf' are obsolete
1803 (use features from gv.el instead):
1804 `define-modify-macro' (use `gv-letplace')
1805 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1806 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1807 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1811 *** Changes are now highlighted using the same color scheme as in
1812 modern VCSes. Deletions are displayed in red (new faces
1813 `diff-refine-removed' and `smerge-refined-removed', and new definition
1814 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1815 and `smerge-refined-added', and new definition of `diff-added').
1817 *** The variable `diff-use-changed-face' defines whether to use the
1818 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1819 changes in context diffs.
1821 *** The new command `diff-delete-trailing-whitespace' removes trailing
1822 whitespace introduced by a diff.
1824 ** Ediff now uses the same color scheme as Diff mode.
1828 A new version of python.el, which provides several new features, including:
1829 per-buffer shells, better indentation, Python 3 support, and improved
1830 shell-interaction compatible with iPython (and virtually any other
1833 *** Some user options have been replaced/renamed, including (old -> new):
1834 **** python-indent -> python-indent-offset
1835 **** python-guess-indent -> python-indent-guess-indent-offset
1836 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1837 **** python-use-skeletons -> python-skeleton-autoinsert
1839 *** Some user options have been removed, including:
1841 **** `python-indent-string-contents': Strings are never indented.
1843 **** `python-honour-comment-indentation':
1844 Comments are always considered as indentation markers.
1846 **** `python-continuation-offset': Indentation is automatically
1847 calculated in a pep8 compliant way depending on the context.
1849 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1850 Have no direct mapping as the shell interaction is completely different.
1852 **** `python-python-command', `python-jython-command':
1853 Replaced by `python-shell-interpreter'.
1855 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1856 `python-pdbtrack-minor-mode-string', `python-source-modes':
1859 *** Some commands have been replaced (old -> new):
1860 **** python-insert-class -> python-skeleton-class
1861 **** python-insert-def -> python-skeleton-def
1862 **** python-insert-for -> python-skeleton-for
1863 **** python-insert-if -> python-skeleton-if
1864 **** python-insert-try/except -> python-skeleton-try
1865 **** python-insert-try/finally -> python-skeleton-try
1866 **** python-insert-while -> python-skeleton-while
1867 **** python-find-function -> python-nav-jump-to-defun
1868 **** python-next-statement -> python-nav-forward-sentence
1869 **** python-previous-statement -> python-nav-backward-sentence
1870 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1871 **** python-end-of-defun-function -> python-nav-end-of-defun
1872 **** python-send-buffer -> python-shell-send-buffer
1873 **** python-send-defun -> python-shell-send-defun
1874 **** python-send-region -> python-shell-send-region
1875 **** python-send-region-and-go -> emulate with python-shell-send-region
1876 and python-shell-switch-to-shell
1877 **** python-send-string -> python-shell-send-string
1878 **** python-switch-to-python -> python-shell-switch-to-shell
1879 **** python-describe-symbol -> python-eldoc-at-point
1883 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1885 *** The D-Bus object manager interface is implemented.
1887 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1888 if their value does not fit into Emacs's integer range.
1890 *** The function `dbus-call-method' is now non-blocking.
1891 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1893 *** Signals can also be sent as unicast messages.
1895 *** The argument list of `dbus-register-signal' has been extended,
1896 according to the new match rule types of D-Bus.
1898 *** `dbus-init-bus' supports private connections.
1900 *** There is a new function `dbus-setenv'.
1902 ** `desktop-path' no longer includes the "." directory.
1903 Desktop files are now located in ~/.emacs.d by default.
1907 *** `dired-do-async-shell-command' executes each file sequentially
1908 if the command ends in `;' (when operating on multiple files).
1909 Otherwise, it executes the command on each file in parallel.
1911 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1912 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1915 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1916 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1917 mark/unmark/flag all files in the active region.
1919 *** The minibuffer default for `=' (`dired-diff') has changed.
1920 It is now the backup file for the file at point, if one exists.
1921 In Transient Mark mode the default is the file at the active mark.
1923 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1924 The global binding for `M-=', `count-words-region' is in effect.
1928 *** New module "notifications", which can send a notification when you
1929 receive a private message or your nickname is mentioned.
1931 *** ERC will look up server/channel names via auth-source and use any
1934 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1935 only applies to messages sent by lurkers.
1937 ** reStructuredText mode
1939 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1940 fontification, comment handling, and customization have all been revised
1943 *** Support for `imenu' and `which-function-mode'.
1945 *** The reStructuredText syntax is more closely covered.
1946 Sphinx support has been improved.
1948 *** `rst-insert-list' inserts new list or continues existing lists.
1950 *** A negative prefix argument always works for `rst-adjust'.
1952 *** The window configuration is reset after displaying a TOC.
1954 *** The constant `rst-version' describes the rst.el package version.
1958 *** Support for percent literals and recognition of regular expressions
1959 in method calls without parentheses with more methods, including Cucumber
1962 *** Improved syntax highlighting and indentation.
1964 *** New command `ruby-toggle-block', bound to `C-c {'.
1966 *** Some non-standard keybindings/commands have been removed:
1968 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1970 **** `ruby-mark-defun'; use `mark-defun'.
1972 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1973 appropriate settings for the variables `beginning-of-defun-function'
1974 and `end-of-defun-function'.
1976 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1977 `reindent-then-newline-and-indent' and `newline' have been removed.
1979 ** Shell Script mode
1981 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1983 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1985 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1989 *** The free software compiler GHDL is supported (and now the default).
1991 *** Support for the VHDL-AMS packages has been added/updated.
1993 *** Updated to the 2002 revision of the VHDL standard.
1995 *** Accepts \r and \f as whitespace.
1999 *** The faces used by Apropos are now directly customizable.
2000 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2001 see the `apropos' Custom group for details.
2003 *** The old options whose values specified faces to use have been removed
2004 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2005 `apropos-match-face' and `apropos-property-face'.).
2009 *** This package has been rewritten to use Tabulated List mode.
2011 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2012 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2016 *** Algebraic simplification mode is now the default.
2017 To restrict to the limited simplifications given by the former
2018 default simplification mode, use `m I'.
2022 *** You can customize the header text that appears above each calendar month.
2023 See the variable `calendar-month-header'.
2025 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2027 *** The calendars produced by cal-html include holidays.
2028 Customize `cal-html-holidays' to change this.
2032 *** The major modes from the parser generators "Bovine" and "Wisent"
2033 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2034 are in `auto-mode-alist', and the corresponding manuals are included.
2038 **** Menu support for the "Configuration" feature. This allows users to
2039 choose the active configuration (such as debug or install) from the menu.
2041 **** New command `ede-set' to interactively set project-local variables.
2043 **** Support for compiling, debugging, and running in "generic" projects.
2045 **** Autoconf editing support for M4 macros with complex arguments.
2047 **** Compilation support for the "linux" project type.
2049 **** "simple" projects have been removed; use "generic" projects instead.
2053 **** Support for parsing #include statements inside a namespace in C/C++.
2055 **** Improved support for 'extern "C"' declarations in C/C++.
2057 **** The ability to ignore more common special C/C++ preprocessor symbols,
2058 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2059 If available, include cdefs.h as an additional source of preprocessor symbols.
2061 **** Improved C/C++ function pointer parsing.
2063 **** In Python, support for converting imports to include file names.
2065 **** Ability to dynamically determine the Python load path.
2067 **** Support for the Python 'WITH' and 'AT' keywords.
2069 **** Improved tooltip completion.
2073 **** The SRecode manual is now included.
2075 **** Tag generation supports constructor/destructor settings and system
2076 include differentiation.
2078 **** Addition of 'Framework' support: Frameworks are specified when a
2079 particular kind of library (such as Android) is needed in a common language
2082 **** Support for nested templates and let variables override based on priority.
2084 **** Support for merging tables from multiple related modes, such as
2085 default -> c++ -> arduino.
2087 ** Compile has a new option `compilation-always-kill'.
2091 *** `custom-reset-button-menu' now defaults to t.
2093 *** Non-option variables are never matched in `customize-apropos' and
2094 `customize-apropos-options' (i.e., the prefix argument does nothing for
2095 these commands now).
2099 *** The variables `term-default-fg-color' and `term-default-bg-color'
2100 are now deprecated in favor of the customizable face `term'.
2102 *** You can customize how to display ANSI terminal colors and styles
2103 by customizing the corresponding `term-color-<COLOR>',
2104 `term-color-underline' and `term-color-bold' faces.
2108 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2110 *** Remote processes are now also supported on remote MS-Windows hosts.
2114 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2115 Previously, this slot stored semicolon-separated attribute-value pairs
2116 appended to some imap URLs, but this is not compatible with RFC 3986.
2117 So now the `filename' slot stores the entire path and query components,
2118 and the `attributes' slot is always nil.
2120 *** New function `url-encode-url' for encoding a URI string.
2121 The `url-retrieve' function now uses this to encode its URL argument,
2122 in case that is not properly encoded.
2124 ** notifications.el supports now version 1.2 of the Notifications API.
2125 The function `notifications-get-capabilities' returns the supported
2128 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2129 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2130 `flymake-warning-bitmap'.
2132 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2133 specifying URL types that should be converted to remote file names at
2134 the FFAP prompt. The default is now '("ftp").
2136 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2137 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2139 ** New option `mouse-avoidance-banish-position' specifies where the
2140 `banish' mouse avoidance setting moves the mouse.
2142 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2143 closing brackets to be aligned with the line of the opening bracket.
2145 ** In Proced mode, new command `proced-renice' renices marked processes.
2147 ** New option `async-shell-command-buffer' specifies the buffer to use
2148 for a new asynchronous `shell-command' when the default output buffer
2149 `*Async Shell Command*' is already in use.
2151 ** SQL mode has a new option `sql-db2-escape-newlines'.
2152 If non-nil, newlines sent to the command interpreter will be escaped
2153 by a backslash. The default does not escape the newlines and assumes
2154 that the sql statement will be terminated by a semicolon.
2156 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2157 (and modes that derive from it), sorts the column at point, or the Nth
2158 column if a numeric prefix argument is given.
2160 ** `which-func-modes' now defaults to t, so Which Function mode, when
2161 enabled, applies to all applicable major modes.
2163 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2166 ** Follow mode no longer works by using advice.
2167 The option `follow-intercept-processes' has been removed.
2169 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2171 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2172 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2173 *** semantic-change-hooks -> semantic-change-functions
2174 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2175 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2176 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2177 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2178 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2179 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2180 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2181 *** rcirc-activity-hooks -> rcirc-activity-functions
2182 *** rcirc-print-hooks -> rcirc-print-functions
2183 *** dbus-event-error-hooks -> dbus-event-error-functions
2184 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2185 *** checkdoc-style-hooks -> checkdoc-style-functions
2186 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2187 *** archive-extract-hooks -> archive-extract-hook
2188 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2189 *** hfy-post-html-hooks -> hfy-post-html-hook
2190 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2191 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2192 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2193 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2195 ** Obsolete packages
2198 In most cases, assoc+member+push+delq work just as well.
2199 And in any case it's just a terrible package: ugly semantics, terrible
2200 inefficiency, and not namespace-clean.
2209 * Incompatible Lisp Changes in Emacs 24.3
2211 ** Docstrings starting with `*' no longer indicate user options.
2212 Only variables defined using `defcustom' are considered user options.
2213 The function `user-variable-p' is now an obsolete alias for
2214 `custom-variable-p'.
2216 ** The return values of `defalias', `defun' and `defmacro' have changed,
2217 and are now undefined. For backwards compatibility, `defun' and
2218 `defmacro' currently return the name of the newly defined
2219 function/macro, but this should not be relied upon.
2221 ** `random' by default now returns a different random sequence in
2222 every Emacs run. Use `(random S)', where S is a string, to set the
2223 random seed to a value based on S, in order to get a repeatable
2224 sequence in later calls.
2226 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2227 that substring is inserted literally even if the LITERAL arg is
2228 non-nil, instead of causing an error to be signaled.
2230 ** `select-window' now always makes the window's buffer current.
2231 It does so even if the window was selected before.
2233 ** The function `x-select-font' can return a font spec, instead of a
2234 font name as a string. Whether it returns a font spec or a font name
2235 depends on the graphical library.
2237 ** `face-spec-set' no longer sets frame-specific attributes when the
2238 third argument is a frame (that usage was obsolete since Emacs 22.2).
2240 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2242 ** The CL package's `get-setf-method' function no longer exists.
2243 Generalized variables are now part of core Emacs Lisp, and implemented
2244 differently to the way cl.el used to do it. It is not possible to
2245 define a compatible replacement for `get-setf-method'. See the file
2246 gv.el for internal details of the new implementation.
2248 ** The arguments of `dbus-register-signal' are no longer just strings,
2249 but keywords or keyword-string pairs. The old argument list will
2250 still be supported for Emacs 24.x.
2252 ** Miscellaneous name changes
2253 Some Lisp symbols have been renamed to correct their spelling,
2254 or to be more consistent with standard Emacs terminology.
2256 *** Renamed functions
2257 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2258 **** inactivate-input-method -> deactivate-input-method
2259 **** quail-inactivate -> quail-deactivate
2260 **** robin-inactivate -> robin-deactivate
2261 **** viper-inactivate-input-method -> viper-deactivate-input-method
2262 **** viper-inactivate-input-method-action ->
2263 viper-deactivate-input-method-action
2264 **** ucs-input-inactivate -> ucs-input-deactivate
2267 The old hooks are still supported for backward compatibility, but they
2268 are deprecated and will be removed eventually.
2269 **** input-method-inactivate-hook -> input-method-deactivate-hook
2270 **** robin-inactivate-hook -> robin-deactivate-hook
2271 **** quail-inactivate-hook -> quail-deactivate-hook
2273 *** Renamed variables
2274 **** follow-deactive-menu -> follow-inactive-menu
2275 **** inactivate-current-input-method-function ->
2276 deactivate-current-input-method-function
2278 ** Some obsolete functions, variables, and faces have been removed:
2279 *** `last-input-char', `last-command-char', `unread-command-char'
2280 *** `facemenu-unlisted-faces'
2281 *** `rmail-decode-mime-charset'
2282 *** `iswitchb-read-buffer'
2283 *** `sc-version', `sc-submit-bug-report'
2284 *** `set-char-table-default'
2285 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2286 *** `compile-internal'
2288 *** `mode-line-inverse-video'
2289 *** `follow-mode-off-hook'
2290 *** `cvs-commit-buffer-require-final-newline'
2291 (use `log-edit-require-final-newline' instead)
2292 *** `cvs-changelog-full-paragraphs'
2293 (use `log-edit-changelog-full-paragraphs' instead)
2294 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2295 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2296 *** `vc-master-templates' (use `vc-handled-backends' instead)
2297 *** `vc-checkout-carefully'
2300 * Lisp Changes in Emacs 24.3
2302 ** CL-style generalized variables are now in core Elisp.
2303 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2304 You can define your own generalized variables using `gv-define-simple-setter',
2305 `gv-define-setter', etc.
2307 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2308 This can significantly speed up execution of non-byte-compiled code,
2309 but can also bump into previously unnoticed cyclic dependencies.
2310 These are generally harmless: they will simply cause the macro calls
2311 to be left for later expansion (as before), but will result in a
2312 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2313 You may wish to restructure your code so this does not happen.
2315 ** New sampling-based Elisp profiler.
2316 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2317 When finished, use M-x profiler-stop. The sampling rate can be based on
2318 CPU time or memory allocations.
2320 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2321 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2323 ** New macros `setq-local' and `defvar-local'.
2325 ** Face underlining can now use a wave.
2327 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2328 of `read-regexp' accepts a string ending with a colon and space, and its
2329 second argument DEFAULTS can be a list of strings accessible via `M-n'
2330 in the minibuffer ahead of other hard-coded useful regexp-related values.
2331 More commands use `read-regexp' now to read their regexp arguments.
2335 *** New function `completion-table-with-quoting' to handle completion
2336 in the presence of quoting, such as file completion in shell buffers.
2338 *** New function `completion-table-subvert' to use an existing completion
2339 table, but with a different prefix.
2343 *** New error type and new function `user-error'.
2344 These do not trigger the debugger.
2346 *** New option `debugger-bury-or-kill', saying what to do with the
2347 debugger buffer when exiting debug.
2349 *** Set `debug-on-message' to enter the debugger when a certain
2350 message is displayed in the echo area. This can be useful when trying
2351 to work out which code is doing something.
2353 *** New var `inhibit-debugger', automatically set to prevent accidental
2354 recursive invocations.
2358 *** New command `fit-frame-to-buffer' adjusts the frame height to
2361 *** The command `fit-window-to-buffer' can adjust the frame height
2362 if the new option `fit-frame-to-buffer' is non-nil.
2364 *** New macro `with-temp-buffer-window', similar to
2365 `with-output-to-temp-buffer'.
2367 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2370 *** New option `switch-to-buffer-preserve-window-point' to restore a
2371 window's point when switching buffers.
2373 *** New display action alist entries `window-height' and `window-width'
2374 specify the size of new windows created by `display-buffer'.
2376 *** New display action alist entry `pop-up-frame-parameters', if
2377 non-nil, specifies frame parameters to give any newly-created frame.
2379 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2380 tells display action functions to avoid changing which frame is
2383 *** New display action alist entry `previous-window', if non-nil,
2384 specifies window to reuse in `display-buffer-in-previous-window'.
2386 *** New display action functions `display-buffer-below-selected',
2387 and `display-buffer-in-previous-window'.
2389 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2390 now accept a third argument to avoid choosing the selected window.
2392 *** Additional values recognized for option `window-combination-limit'.
2394 *** The following variables are obsolete, as they can be replaced by
2395 appropriate entries in the `display-buffer-alist' function introduced
2397 **** `dired-shrink-to-fit'
2398 **** `display-buffer-reuse-frames'
2399 **** `display-buffer-function'
2400 **** `special-display-buffer-names'
2401 **** `special-display-frame-alist'
2402 **** `special-display-function'
2403 **** `special-display-regexps'
2407 *** `current-time-string' no longer requires that its argument's year
2408 must be in the range 1000..9999. It now works with any year supported
2409 by the underlying C implementation.
2411 *** `current-time' now returns extended-format time stamps
2412 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2413 PSEC is typically a multiple of 1000 on current machines. Other
2414 functions that use this format, such as `file-attributes' and
2415 `format-time-string', have been changed accordingly. Old-format time
2416 stamps are still accepted.
2418 *** The format of timers in `timer-list' and `timer-idle-list' is now
2419 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2420 The PSECS slot is new, and uses picosecond resolution. It can be
2421 accessed via the new `timer--psecs' accessor.
2423 *** Last-modified time stamps in undo lists now are of the form
2424 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2428 *** Improved security when handling persistent objects:
2430 **** `eieio-persistent-read' now features optional arguments for specifying
2431 the class to load, as well as a flag stating whether subclasses are allowed;
2432 if provided, other classes will be rejected by the reader. For
2433 compatibility with existing code, if the class is omitted only a
2436 **** New specialized reader for pulling in classes and signaling errors
2437 without evaluation of suspicious code.
2439 **** All slots that contain objects must have a :type. Slots with lists
2440 of objects must use a new type predicate for a list of an object type.
2442 *** Support for `find-function' and similar utilities, through the addition
2443 of filename support to generated symbols.
2445 ** Floating point functions now always return special values like NaN,
2446 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2447 Previously, they returned NaNs on some platforms but signaled errors
2448 on others. The affected functions are acos, asin, tan, exp, expt,
2449 log, log10, sqrt, and mod.
2451 ** New fringe bitmap `exclamation-mark'.
2453 ** Miscellaneous changes to special forms and macros
2455 *** `defun' and `defmacro' are now macros rather than special forms.
2457 *** `kbd' is now a function rather than a macro.
2459 ** Miscellaneous new functions
2461 *** `set-temporary-overlay-map' sets up a temporary keymap that
2462 takes precedence over most other maps for a short while (normally one key).
2464 *** `autoloadp' tests if its argument is an autoloaded object.
2466 *** `autoload-do-load' performs the autoloading operation.
2468 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2470 *** `file-name-base' returns a file name sans directory and extension.
2472 *** `function-get' fetches a function property, following aliases.
2474 *** `posnp' tests if an object is a `posn'.
2476 *** `system-users' returns the user names on the system.
2478 *** `system-groups' returns the group names on the system.
2480 *** `tty-top-frame' returns the topmost frame of a text terminal.
2482 ** The following functions and variables are obsolete:
2483 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2484 *** `buffer-has-markers-at'
2485 *** `macro-declaration-function' (use `macro-declarations-alist')
2486 *** `window-system-version' (provides no useful information)
2487 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2488 *** `query-replace-interactive'
2489 *** `font-list-limit' (has had no effect since Emacs < 23)
2492 * Changes in Emacs 24.3 on Non-Free Operating Systems
2494 ** Cygwin builds can use the native MS Windows user interface.
2495 Pass `--with-w32' to configure. The default remains the X11 interface.
2497 ** Two new functions are available in Cygwin builds:
2498 `cygwin-convert-file-name-from-windows' and
2499 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2500 code to access the Cygwin file-name mapping machinery to convert
2501 between Cygwin and Windows-native file and directory names.
2503 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2504 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2505 `mouse-autoselect-window'.
2507 ** On MS Windows Vista and later Emacs now supports symbolic links.
2509 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2510 support for libxml2, even if its presence is detected.
2512 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2514 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2515 directories to the search path. You must add them yourself if you want them.
2518 * Changes in Emacs 24.2
2520 ** This is mainly a bug-fix release.
2523 * Installation Changes in Emacs 24.1
2525 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2526 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2527 also depend on Gtk+. You can disable them with --without-rsvg and
2530 ** Emacs can be compiled with GnuTLS support.
2531 This happens by default if a suitably recent version of the library is
2532 found at build time. To prevent this, use the configure option
2533 `--without-gnutls'. See below for GnuTLS features.
2535 ** Emacs can be compiled with SELinux support.
2536 This happens by default if a suitably recent version of the library is
2537 found at build time. To prevent this, use the configure option
2538 `--without-selinux'. See below for SELinux features.
2540 ** Emacs can be compiled with ImageMagick support.
2541 This happens by default if a suitably recent version of the library is
2542 found at build time. To prevent this, use the configure option
2543 `--without-imagemagick'. See below for ImageMagick features.
2544 This feature is not available for the Nextstep or MS ports.
2546 ** Emacs can be compiled with libxml2 support.
2547 This happens by default if a suitably recent version of the library is
2548 found at build time. To prevent this, use the configure option
2549 `--without-xml2'. See below for libxml2 features.
2551 ** By default, the installed Info and man pages are compressed.
2552 You can disable this by configuring --without-compress-info.
2554 ** New configure option --with-wide-int.
2555 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2556 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2559 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2560 These provide no new functionality, they just remove the need to edit
2561 lib-src/Makefile by hand in order to use the associated features.
2563 ** New configure option --enable-use-lisp-union-type.
2564 This is only useful for Emacs developers to debug certain types of bugs.
2565 This is not a new feature; only the configure flag is new.
2567 ** The standalone programs digest-doc and sorted-doc are removed.
2568 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2570 ** The standalone program `fakemail' is removed.
2571 If you need it, feedmail.el provides a superset of the functionality.
2574 * Startup Changes in Emacs 24.1
2576 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2577 command line arguments, and the EMACS_UNIBYTE environment variable, no
2578 longer have any effect. (They were declared obsolete in Emacs 23.)
2580 ** New command line option `--no-site-lisp' removes site-lisp directories
2581 from load-path. -Q now implies this. This option does not affect the
2582 EMACSLOADPATH environment variable (and hence has no effect for
2586 * Changes in Emacs 24.1
2590 *** Many packages now use the `completion-at-point' command,
2591 rather than implementing separate completion commands.
2593 *** `completion-at-point' now handles tags and semantic completion.
2595 *** Completion in a non-minibuffer now tries to detect the end of completion
2596 and pops down the *Completions* buffer accordingly.
2598 *** New option `completion-cycle-threshold' allows completion cycling.
2600 *** New option `completion-category-overrides' for overriding the
2601 default completion style in certain circumstances.
2603 *** New completion style `substring'.
2605 *** Completion of buffer names uses `substring' completion by default.
2607 *** The option `widget-complete-field' has been removed.
2611 *** The first time you try sending mail, Emacs asks for a mail method.
2612 This is implemented by a new default for `send-mail-function', which
2613 is `sendmail-query-once'. This offers to use the smtpmail package, or
2614 to use the old defaults relying on external mail facilities
2615 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2616 `mailclient-send-it' on Windows).
2618 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2619 transfers the report to your desktop's preferred mail client, if there
2620 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2623 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2624 and Mail mode changes
2626 ** Emacs server and client changes
2628 *** New option `server-port' specifies the port for TCP Emacs servers.
2630 *** New emacsclient argument -q/--quiet suppresses some status messages.
2632 *** New emacsclient argument --frame-parameters specifies the frame
2633 parameters of any newly-created graphical frame.
2635 *** If emacsclient shuts down due to Emacs signaling an error,
2636 its exit status is 1.
2638 *** New emacsclient argument --parent-id ID.
2639 This opens a client frame in parent X window ID, via XEmbed, similar
2640 to the --parent-id argument to Emacs.
2642 ** Internationalization changes
2644 *** Emacs now supports display and editing of bidirectional text.
2645 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2646 displayed in the correct visual order as expected by users of those
2647 scripts. The display reordering is a "full bidirectionality" class
2648 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2649 with no RTL text should look exactly the same as before.
2651 **** New buffer-local variable `bidi-display-reordering'.
2652 To disable display reordering in a buffer, change this to nil.
2654 **** New buffer-local variable `bidi-paragraph-direction'.
2655 If nil (the default), Emacs determines the base direction of each
2656 paragraph from its text, as specified by the UBA. Setting the value
2657 to `right-to-left' or `left-to-right' forces a base direction on each
2660 Paragraphs with right-to-left base direction are displayed starting at
2661 the right window edge.
2663 *** Enhanced support for characters with no glyphs in available fonts,
2664 or, on text terminals, characters that cannot be encoded by the
2665 terminal coding system. The new option `glyphless-char-display-control'
2666 specifies how to display them: as a hexadecimal code in a box, a thin
2667 1-pixel space, an empty box, etc.
2669 *** New input methods for Farsi and Bulgarian
2670 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2672 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2673 (U+2010 and U+2011).
2675 *** New Hebrew translation of the Emacs Tutorial.
2676 Type `C-u C-h t' to choose it in case your language setup doesn't
2677 automatically select it.
2679 ** An Emacs Lisp package manager is now included.
2680 This is a convenient way to download and install additional packages,
2681 from a package repository at http://elpa.gnu.org.
2683 *** M-x list-packages shows a list of packages, which can be
2684 selected for installation.
2686 *** New command `describe-package', bound to `C-h P'.
2688 *** By default, all installed packages are loaded automatically when
2689 Emacs starts up. To disable this, set `package-enable-at-startup' to
2690 nil. To specify the packages to load, customize `package-load-list'.
2692 ** Custom theme changes
2694 *** New command `M-x customize-themes', which provides a convenient
2695 interface for enabling and disabling Custom themes.
2697 *** New option `custom-theme-load-path' is the load path for themes.
2698 Emacs no longer looks for Custom themes in `load-path'. The default
2699 value of `custom-theme-load-path' says to look for themes in
2700 `custom-theme-directory', followed by a subdirectory of
2701 `data-directory' named "themes/", which contains a small selection of
2702 built-in Custom themes.
2704 *** New option `custom-safe-themes' records known-safe theme files.
2705 If a theme is not in this list, Emacs queries before loading it, and
2706 offers to save the theme to `custom-safe-themes' automatically. By
2707 default, all themes included in Emacs are treated as safe.
2709 ** Improved GTK integration
2711 *** GTK scroll-bars are now placed on the right by default.
2712 The function `set-scroll-bar-mode' can change this.
2714 *** GTK tool bars can have just text, just images or images and text.
2715 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2716 the default is taken from desktop settings.
2718 *** GTK tool bars can be placed on any edge of the frame.
2719 The frame-parameter tool-bar-position controls this. It takes the
2720 values top, left, right or bottom. The Options => Show/Hide menu has
2723 *** The default colors for selected text (the `region' face) are taken
2724 from the GTK theme when Emacs is built with GTK.
2726 *** Emacs uses GTK tooltips by default if built with GTK.
2727 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2729 ** Graphical interface changes
2731 *** On graphical displays, the mode-line no longer ends in dashes.
2732 Also, the first dash (which does not indicate anything) is just
2733 displayed as a space.
2735 *** `menu-bar-select-buffer-function' lets you choose another operation
2736 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2738 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2739 built with Xft. These fonts can be set via X resources, for example:
2740 Emacs.pane.menubar.font: Courier-12
2744 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2745 or if it receives a SIGINT signal in batch mode.
2747 *** `kill-emacs-hook' is now also run in batch mode.
2748 Third-party code which adds to `kill-emacs-hook' should check if they
2749 do the right thing in batch mode.
2751 ** Scrolling changes
2753 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2754 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2755 of buffer at first key-press (instead they move to top/bottom of buffer)
2756 when `scroll-error-top-bottom' is non-nil.
2758 *** New option `scroll-error-top-bottom' (see above).
2760 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2761 scroll a line instead of full screen.
2763 *** New property `scroll-command' should be set on a command's symbol to
2764 define it as a scroll command affected by `scroll-preserve-screen-position'.
2766 *** If you customize `scroll-conservatively' to a value greater than 100,
2767 Emacs will never recenter point in the window when it scrolls due to
2768 cursor motion commands or commands that move point (e.f., `M-g M-g').
2769 Previously, you needed to use `most-positive-fixnum' as the value of
2770 `scroll-conservatively' to achieve the same effect.
2772 *** "Aggressive" scrolling now honors the scroll margins.
2773 If you customize `scroll-up-aggressively' or
2774 `scroll-down-aggressively' and move point off the window, Emacs now
2775 scrolls the window so as to avoid positioning point inside the scroll
2778 ** Basic SELinux support has been added.
2779 This requires Emacs to be linked with libselinux at build time.
2781 *** Emacs preserves the SELinux file context when backing up.
2782 Also, the function `copy-file' has an extra optional argument for
2783 preserving SELinux context, and the return value of `backup-buffer'
2784 now includes the SELinux context.
2786 *** New functions `file-selinux-context' and `set-file-selinux-context'
2787 get and set the SELinux context of a file.
2791 *** `delete-by-moving-to-trash' now only affects commands that specify
2792 trashing. This avoids inadvertently trashing temporary files.
2794 *** Calling `delete-file' or `delete-directory' with a prefix argument
2795 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2797 ** File- and directory-local variable changes
2799 *** You can stop directory local vars from applying to subdirectories.
2800 Add an element (subdirs . nil) to the alist portion of any variables
2801 settings to indicate that the section should not apply to
2804 *** Directory local variables can apply to some file-less buffers.
2805 Affected modes include dired, vc-dir, and log-edit. For example,
2806 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2807 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2808 `hack-dir-local-variables-non-file-buffer' to support this.
2810 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2811 Instead, use "eval: (minor-mode 1)".
2813 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2814 to `inhibit-local-variables-regexps'. As the name suggests, it now
2815 applies to ALL file local variables, not just -*- lines. The
2816 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2821 *** The `quit-window' command now restores the last buffer displayed
2822 in the quitted window.
2824 *** Resizing an Emacs frame now preserves proportional window sizes,
2825 modulo restrictions like window minimum sizes and fixed-size windows.
2827 *** The behavior of `display-buffer' is now customizable in detail.
2829 **** New option `display-buffer-base-action' specifies a list of
2830 user-determined display "actions" (functions and optional arguments
2831 for choosing the displaying window).
2833 This takes precedence over the default display action, which is
2834 specified by `display-buffer-fallback-action'.
2836 **** New option `display-buffer-alist' maps buffer name regexps to
2837 display actions, taking precedence over `display-buffer-base-action'.
2839 *** New option `window-combination-limit'.
2840 The new option `window-combination-limit' allows to return the space
2841 obtained for resizing or creating a window more reliably to the window
2842 from which such space was obtained.
2844 *** New option `window-combination-resize'.
2845 The new option `window-combination-resize' allows to split a window that
2846 otherwise cannot be split because it's too small by stealing space from
2847 other windows in the same combination. Subsequent resizing or deletion
2848 of the window will resize all windows in the same combination as well.
2850 *** New option `frame-auto-hide-function' lets you choose between
2851 iconifying or deleting a frame when burying a buffer in a dedicated
2852 frame, or quitting a window showing a buffer in a frame of its own.
2854 *** New commands `maximize-window' and `minimize-window'.
2855 These maximize and minimize the size of a window within its frame.
2857 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2858 These functions allow to navigate through the live buffers that have
2859 been shown in a specific window.
2861 ** Minibuffer changes
2863 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2864 This is handy for minibuffer-only frames, and is also used for the feature
2865 where mouse-1 pops up *Messages*"', which can now easily be changed.
2867 *** Minibuffers set `truncate-lines' to nil.
2868 If you want to change the value to something else, you could use
2869 for example `minibuffer-setup-hook'.
2871 ** `auto-mode-case-fold' is now enabled by default.
2873 ** `backup-by-copying-when-mismatch' now defaults to t.
2875 ** New basic faces `error', `warning', `success'.
2876 These are used to highlight text indicating failure, caution or
2877 successful operation.
2879 ** New option `list-colors-sort' defines the color sort order
2880 for `list-colors-display'.
2882 ** The variable `focus-follows-mouse' now always defaults to nil.
2885 * Editing Changes in Emacs 24.1
2889 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2890 `isearch-yank-line'.
2892 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2893 `isearch-yank-kill'.
2895 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2897 ** New commands `count-words-region' and `count-words'.
2899 *** M-= is bound to `count-words-region', not `count-lines-region'.
2900 The `count-words-region' command, when called interactively, reports
2901 the number of lines, words, and characters in the region. It is a
2902 superset of the old `count-lines-region', which is now an obsolete
2905 ** The command `just-one-space' (M-SPC), if given a negative argument,
2906 also deletes newlines around point.
2910 *** New option `delete-active-region'.
2911 If non-nil, [delete] and DEL delete the region if it is active and no
2912 prefix argument is given. If set to `kill', those commands kill
2915 *** New command `delete-forward-char', bound to [delete].
2916 This is meant for interactive use, and obeys `delete-active-region'.
2917 The command `delete-char' does not obey `delete-active-region'.
2919 *** `delete-backward-char' is now a Lisp function.
2920 Apart from obeying `delete-active-region', its behavior is unchanged.
2921 However, the byte compiler now warns if it is called from Lisp; Lisp
2922 callers should use delete-char with a negative argument instead.
2924 *** The option `mouse-region-delete-keys' has been deleted.
2926 ** Selection changes.
2928 The default handling of clipboard and primary selections has been
2929 changed to conform with modern X applications. In short, most
2930 commands for killing and yanking text now use the clipboard, while
2931 mouse commands use the primary selection.
2933 In the following, we provide a list of these changes, followed by a
2934 list of steps to get the old behavior back if you prefer that.
2936 *** `select-active-regions' now defaults to t.
2937 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2938 the kill ring. The selected text is put in the primary selection, if
2939 the system possesses a separate primary selection facility (e.g. X).
2941 **** `select-active-regions' also accepts a new value, `only'.
2942 This means to only set the primary selection for temporarily active
2943 regions (usually made by mouse-dragging or shift-selection);
2944 "ordinary" active regions, such as those made with C-SPC followed by
2945 point motion, do not alter the primary selection.
2947 **** `mouse-drag-copy-region' now defaults to nil.
2949 *** mouse-2 is now bound to `mouse-yank-primary'.
2950 This pastes from the primary selection, ignoring the kill-ring.
2951 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2953 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2955 *** `x-select-enable-primary' now defaults to nil.
2956 Thus, commands that kill text or copy it to the kill-ring (such as
2957 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2959 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2960 exactly equivalent to M-w, C-w, and C-y respectively.
2962 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2963 non-nil by default, as Windows does not support the primary selection
2964 between applications.
2966 *** To return to the previous behavior, do the following:
2968 **** Change `select-active-regions' to nil.
2969 **** Change `mouse-drag-copy-region' to t.
2970 **** Change `x-select-enable-primary' to t (on X only).
2971 **** Change `x-select-enable-clipboard' to nil.
2972 **** Bind `mouse-yank-at-click' to mouse-2.
2974 *** Support for X cut buffers has been removed.
2976 *** X clipboard managers are now supported.
2977 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2979 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2980 in the current rectangle. With a prefix argument, this prompts for a
2981 number to count from and for a format string.
2983 ** `redisplay-dont-pause' now defaults to t.
2984 This makes Emacs feel more responsive to editing commands that arrive
2985 at high rate, e.g. if you lean on some key, because stopping redisplay
2986 in the middle (when this variable is nil) forces more expensive
2987 updates later on, and Emacs appears to be unable to keep up.
2989 ** The behavior of <TAB> for active regions in Text mode has changed.
2990 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2991 when the region is active causes Emacs to indent all the lines in the
2992 region, aligning them with the line previous to the first line in the
2993 region (or with the left margin if there is no previous line).
2995 ** When `occur' is called with a prefix argument, matching strings are
2996 collected into the `*Occur*' buffer without line numbers. If there
2997 are parenthesized subexpressions in the specified regexp, `occur'
2998 reads replacement text that may contain \\& and \\N whose convention
2999 follows `replace-match'.
3002 * Changes in Specialized Modes and Packages in Emacs 24.1
3004 ** Archive Mode has basic support for browsing and updating 7z archives.
3008 *** BibTeX mode now supports biblatex.
3009 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3010 `bibtex-entry-field-alist' is now an obsolete alias for
3011 `bibtex-BibTeX-entry-alist'.
3013 *** New command `bibtex-search-entries', bound to C-c C-a.
3015 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3017 *** New variable `bibtex-search-entry-globally'.
3021 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3023 *** The default browser used by the package is now the "xdg-open" program,
3024 on platforms that support it. This calls your desktop's preferred browser.
3028 *** Support for musical notes.
3030 *** Support for logarithmic units.
3032 *** No longer uses the tex prefix for TeX specific unit names when
3033 using TeX or LaTeX mode.
3035 *** New option to highlight selections using faces.
3037 *** `calc-histogram' has the option of using a vector to determine the bins.
3039 *** New "O" option prefix.
3041 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3043 ** Calendar, Diary, and Appt
3045 *** Diary entries can contain non-printing "comments".
3046 See the variable `diary-comment-start'.
3048 *** Appointments can specify their individual warning times.
3049 See the variable `appt-warning-time-regexp'.
3051 *** The function specified by `appt-disp-window-function' may be passed
3052 lists of arguments if multiple appointments are due at similar times.
3053 If you are using a custom function for this, you should update it.
3055 *** New function `diary-hebrew-birthday'.
3057 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3058 may no longer be nil, but must all be strings.
3060 *** The obsolete (since Emacs 22.1) method of enabling the appt
3061 package by adding `appt-make-list' to `diary-hook' has been removed.
3062 Use `appt-activate' instead.
3064 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3065 appt-issue-message (use the function appt-activate)
3066 appt-visible/appt-msg-window (use the variable appt-display-format)
3068 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3069 view-diary-entries, list-diary-entries, show-all-diary-entries
3073 *** New feature to "guess" the style in an existing buffer.
3074 The main entry point is M-x c-guess.
3076 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3078 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3079 Thus C-M-a will, by default, go to the beginning of the immediate function,
3082 *** "Macros with semicolons" can be registered for correct indentation.
3083 Where such a macro ends a line (no semicolon) the next statement is no longer
3084 parsed as a statement continuation.
3086 ** Comint and modes derived from it use the standard completion code.
3090 *** Compilation mode can be used without Font Lock mode.
3091 `compilation-parse-errors-function' is now obsolete.
3093 *** New variable `compilation-filter-start', which is bound while
3094 `compilation-filter-hook' runs. It records the start position of the
3095 text inserted by `compilation-filter'.
3097 *** `compilation-error-screen-columns' and `compilation-first-column'
3098 are obeyed in the editing buffer. So programming language modes can
3099 set them, whereas previously only the value in the *Compilation*
3104 *** Customize buffers now contain a search field.
3105 The search is performed using `customize-apropos'.
3106 To turn off the search field, set `custom-search-field' to nil.
3108 *** Options in customize group buffers start out hidden if not customized.
3109 Use the arrow to the left of the option name to toggle visibility.
3111 *** custom-buffer-sort-alphabetically now defaults to t.
3113 *** The color widget now has a "Choose" button, which allows you to
3114 choose a color via `list-colors-display'.
3118 *** It is now possible to access buses other than the default system
3121 *** The `dbus-register-method' and `dbus-register-property' functions
3122 optionally do not register names.
3124 *** The new function `dbus-register-service' registers a known service
3125 name on a D-Bus without also registering a property or a method.
3129 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3130 if called with a prefix argument, read a file name from the minibuffer
3131 instead of using the current buffer.
3133 *** The "dired local variables" feature of Dired-x is obsolete.
3134 The standard directory local variables feature replaces it.
3138 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3139 controlling attempts to autojoin a channel.
3141 *** New variable `erc-coding-system-precedence': If we use `undecided'
3142 as the server coding system, this variable will then be consulted.
3143 The default is to decode strings that can be decoded as utf-8 as
3144 utf-8, and do the normal `undecided' decoding for the rest.
3148 *** The default value of `eshell-directory-name' has changed
3149 to be an "eshell" directory in `user-emacs-directory'.
3150 The old "~/.eshell/" directory is still used if it exists, though.
3154 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3155 It now supports multithread non-stop debugging and simultaneous
3156 debugging of several threads.
3160 *** RET (`image-toggle-animation') toggles animation, if applicable.
3161 Animation plays once, unless the option `image-animate-loop' is non-nil.
3165 *** New command M-x info-display-manual displays a named Info manual.
3166 If that manual is already visited in some Info buffer, it displays
3167 that buffer. (This is handy if you have many manuals in many *info*
3168 buffers, and don't remember the name of the buffer visiting the manual
3169 you want to consult.) Otherwise, it loads and displays the manual.
3171 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3172 This is for compatibility with the stand-alone Info reader program,
3173 and also because `Info-edit' is a rarely used command that is disabled
3176 ** Mail mode changes (not Message mode)
3178 *** New command M-x mail-add-attachment for adding MIME attachments
3180 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3181 (Its name is misleading, since it has nothing to do with MIME
3182 attachments.) The old name is now an obsolete alias to the new name.
3184 ** MH-E has been updated to MH-E version 8.3.1.
3185 See MH-E-NEWS for details.
3187 ** Modula-2 mode provides auto-indentation.
3189 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3191 ** nXML mode no longer binds C-RET to `nxml-complete'.
3192 Completion is now performed via `completion-at-point', bound to C-M-i
3193 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3194 default), this performs tag completion.
3196 ** Org mode has been updated to version 7.8.09.
3197 See ORG-NEWS for details.
3199 ** Prolog mode has been completely revamped, with lots of additional
3200 functionality such as more intelligent indentation, electricity,
3201 support for more variants, including Mercury, and a lot more.
3205 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3206 in the Rmail incoming message.
3208 *** The variable `rmail-message-filter' no longer has any effect.
3209 This change was made in Emacs 23.1 but was not advertised at the time.
3210 Try using `rmail-show-message-hook' instead.
3214 *** M-x shell prompts for the shell path name if the default directory
3215 is a remote file name and neither the environment variable $ESHELL nor
3216 the variable `explicit-shell-file-name' is set.
3218 *** TAB is now bound to the standard `completion-at-point' command,
3219 which now implements the pcomplete rules for shell command completion.
3223 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3224 if the mail server supports them. This uses either built-in GnuTLS
3225 support, or the starttls.el library. Customize `smtpmail-stream-type'
3228 *** The variable `smtpmail-auth-credentials' has been removed.
3229 By default, the information is now stored in the file ~/.authinfo.
3230 This was the default value of smtpmail-auth-credentials. If you had
3231 customized smtpmail-auth-credentials to a list of user names and
3232 passwords, those settings are not used. During your first connection
3233 to the smtp server, Emacs will prompt for the user name and password,
3234 and offer to save them to ~/.authinfo. Or you can manually copy the
3235 credentials to ~/.authinfo. For example, if you had
3237 (setq smtpmail-auth-credentials
3238 '(("mail.example.org" 25 "jim" "s!cret")))
3240 then the equivalent line in ~/.authinfo would be
3242 machine mail.example.org port 25 login jim password s!cret
3244 See the auth-source manual for more information, e.g. on encrypting
3245 the credentials file.
3247 *** The variable `smtpmail-starttls-credentials' has been removed.
3248 If you had that set, you need to put
3250 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3252 in your ~/.authinfo file instead.
3254 *** SMTPmail defaults to using the address in the From: header as the
3255 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3256 to the address you wish to use instead.
3260 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3261 and `sql-oracle-scan-on'.
3263 *** New options controlling prompting for login parameters.
3264 Each supported product has a custom variable `sql-*-login-params',
3265 which is a list of the parameters to be prompted for before a
3266 connection is established.
3268 *** The command `sql-product-interactive' now takes a prefix argument,
3269 which causes it to prompt for an SQL product.
3271 *** Product-specific SQL interactive commands now take prefix arguments.
3272 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3273 given a prefix argument, prompt for a name for the SQL interactive
3274 buffer. This reduces the need for calling `sql-rename-buffer'.
3276 *** SQL interactive modes suppress command continuation prompts, and
3277 replace tabs with spaces. The first change impacts multiple line SQL
3278 statements entered with C-j between each line, statements yanked into
3279 the buffer and statements sent with `sql-send-*' functions. The
3280 second prevents the MySQL and Postgres interpreters from listing
3281 object name completions when sent text via `sql-send-*' functions.
3283 *** New command `sql-connect' starts a predefined SQLi session,
3284 using the login parameters from `sql-connection-alist'.
3286 *** New "Save Connection" menu item in SQLi buffers.
3287 This gathers the login params specified for the SQLi session, if it
3288 was not started by a connection, and saves them as a new connection.
3290 *** New commands for listing database objects and details:
3291 sql-list-all and sql-list-table.
3293 *** An API for manipulating SQL product definitions has been added.
3297 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3301 *** New inline access method "ksu" (kerberized su).
3303 *** The following access methods are discontinued: "ssh1_old",
3304 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3306 *** The user option `remote-file-name-inhibit-cache' controls whether
3307 remote file attributes are cached for better performance.
3309 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3310 default value to "".
3312 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3313 for remote machines which support SELinux.
3315 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3316 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3317 the degree of parallelism.
3319 ** VC and related modes
3321 *** Support for pulling on distributed version control systems.
3322 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3323 supported (currently with Bzr, Git, and Mercurial), to update the
3324 current branch and working tree. A prefix argument means to prompt
3325 the user for specifics, e.g. a pull location.
3327 *** `vc-update' is now an alias for `vc-pull'.
3329 *** Support for merging on distributed version control systems.
3330 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3331 is supported (currently with Bzr, Git, and Mercurial), to merge
3332 changes from another branch into the current one. It prompts for
3333 specifics, e.g. a merge source.
3335 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3336 shows a diff while querying the user. It defaults to t.
3338 *** Log entries in some Log View buffers can be toggled to display a
3339 longer description by typing RET (log-view-toggle-entry-display).
3340 This is currently supported for Bzr, Git, and Mercurial (to support
3341 another backend, define a `log-view-expanded-log-entry-function').
3342 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3343 use this to display the full log entry for the revision at point.
3345 *** New command `vc-ediff' allows visual comparison of two revisions
3346 of a file similar to `vc-diff', but using ediff backend.
3348 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3349 this was not advertised at the time.
3351 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3352 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3353 this was not advertised at the time.
3359 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3361 *** partial-completion-mode (complete.el) is obsolete.
3362 You can get a comparable behavior with:
3363 (setq completion-styles '(partial-completion initials))
3364 (setq completion-pcm-complete-word-inserts-delimiters t)
3366 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3368 *** pgg is obsolete (use EasyPG instead).
3370 *** sregex.el is obsolete, since rx.el is a strict superset.
3372 *** s-region.el and pc-select.el are obsolete.
3373 They are superseded by shift-select-mode, enabled by default since 23.1.
3375 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3379 *** The Landmark game is now invoked with `landmark', not `lm'.
3380 Its functions and variables have been similarly renamed.
3382 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3383 (This interfered with cua-mode.)
3385 *** f90.el has some support for Fortran 2008 syntax.
3387 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3389 *** New command `nato-region' converts text to NATO phonetic alphabet.
3392 * New Modes and Packages in Emacs 24.1
3394 ** Occur Edit mode applies edits made in *Occur* buffers to the
3395 original buffers. It is bound to "e" in Occur mode.
3397 ** New global minor mode electric-pair-mode.
3398 When enabled, typing an open parenthesis automatically inserts the
3399 matching closing one.
3401 ** New global minor mode electric-indent-mode.
3402 When enabled, typing certain characters triggers reindentation.
3403 Major modes wishing to use this can set electric-indent-chars or
3404 electric-indent-functions.
3406 ** New global minor mode electric-layout-mode.
3407 When enabled, typing certain characters automatically inserts newlines.
3408 Major modes wishing to use this can set electric-layout-rules.
3410 ** tabulated-list.el provides a generic major mode for tabulated data,
3411 from which other modes can be derived.
3413 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3415 ** secrets.el is an implementation of the Secret Service API, an
3416 interface to password managers like GNOME Keyring or KDE Wallet. The
3417 Secret Service API requires D-Bus for communication. The command
3418 `secrets-show-secrets' offers a buffer with a visualization of the
3421 ** notifications.el provides an implementation of the Desktop
3422 Notifications API. It requires D-Bus for communication.
3424 ** soap-client.el supports access to SOAP web services from Emacs.
3425 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3427 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3429 ** New emacs-lock.el package.
3430 The previous version has been moved to obsolete/old-emacs-lock.el.
3431 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3432 against exiting Emacs and killing the buffer can be set separately.
3433 The mechanism for automatically turning off protection for buffers
3434 with dead inferior processes has been generalized.
3437 * Incompatible Lisp Changes in Emacs 24.1
3439 ** Passing a nil argument to a minor mode function call now ENABLES
3440 the minor mode unconditionally. This is so that you can write e.g.
3442 (add-hook 'text-mode-hook 'foo-mode)
3444 to enable foo-mode in Text mode buffers, removing the need for
3445 `turn-on-foo-mode' style functions. This affects all mode commands
3446 defined by `define-minor-mode'. If called interactively, the mode
3447 command still toggles the minor mode.
3449 ** The return value of `backup-buffer' has changed.
3450 It is now a list of three elements, where the second element is a list
3451 describing the original file's SELinux context. If Emacs or the
3452 system lacks SELinux support, the context list is (nil nil nil nil).
3453 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3455 ** `char-direction-table' and the `char-direction' function were deleted.
3456 They were buggy and inferior to the new support of bidirectional
3457 editing introduced in Emacs 24. If you need the bidirectional
3458 properties of a character, use `get-char-code-property' with the last
3459 argument `bidi-class'.
3461 ** `copy-directory' now copies the source directory as a subdirectory
3462 of the target directory, if the latter is an existing directory. The
3463 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3464 the contents directly into a pre-existing target directory.
3466 ** For mouse click input events in the text area, the Y pixel
3467 coordinate in the POSITION list now counts from the top of the text
3468 area, excluding any header line. Previously, it counted from the top
3471 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3472 been further reduced. Now a backquote not followed by a space is
3473 always treated as a "new-style" backquote. Please remove all
3474 "old-style" backquotes from your code. If your code uses backquotes
3475 as documented in the Elisp manual, and compiles without warning, then
3476 you have nothing to do in this regard. Code not following the
3477 appropriate conventions may fail to compile.
3479 The most common cause of trouble seems to be an old-style backquote
3480 followed by a newline. Another cause of trouble is vector notation
3481 for key sequence notation: instead of [(control ,)] and [(control ')],
3482 you should write [(control ?,)] and [(control ?')], which will work in
3485 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3486 was not advertised at the time. The function `custom-initialize-delay'
3487 replaced all known uses.
3489 ** `view-buffer' now treats special mode-class in the same way that
3490 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3491 major mode is special).
3493 ** Menu and tool bar changes
3495 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3496 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3497 With these alist entries omitted, `make-frame' checks the value of the
3498 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3499 a menu-bar or tool-bar, respectively. If the alist entries are added,
3500 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3502 *** The menu bar bindings's caches are not used any more.
3503 Use (where-is-internal <def> nil t) instead.
3505 ** Regions created by mouse dragging are now normal active regions,
3506 similar to those created by shift-selection (see Selection changes
3507 above). In previous Emacs versions, these regions were delineated by
3508 `mouse-drag-overlay'; that variable has been removed.
3510 ** The fourth argument of `filter-buffer-substring' has been removed.
3511 If you want to remove text properties from the final result, simply
3512 pass the result through substring-no-properties.
3514 ** cl.el no longer provides `cl-19'.
3516 ** The following obsolete functions and aliases have been removed
3517 (the appropriate new function is given in parentheses; "not needed"
3518 means you can just remove all calls to the function in question):
3520 *** `comint-kill-output' (`comint-delete-output')
3521 *** `decompose-composite-char' (`char-to-string')
3522 *** `outline-visible' (`outline-invisible-p')
3523 *** `internal-find-face' (`facep')
3524 *** `internal-get-face' (`facep and check-face')
3525 *** `frame-update-faces' (not needed)
3526 *** `frame-update-face-colors' (`frame-set-background-mode')
3527 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3528 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3529 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3530 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3531 *** `x-make-font-unbold' (`make-face-unbold')
3532 *** `x-make-font-unitalic' (`make-face-unitalic')
3533 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3534 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3535 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3536 *** `char-bytes' (== 1)
3537 *** `isearch-return-char' (`isearch-printing-char')
3538 *** `make-local-hook' (not needed)
3539 *** `set-screen-height' (`set-frame-height')
3540 *** `set-screen-width' (`set-frame-width')
3542 ** The following obsolete variables and varaliases have been removed
3543 (the appropriate new variable is given in parentheses):
3545 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3546 *** `vc-header-alist' (`vc-BACKEND-header')
3547 *** `directory-sep-char' (== ?/)
3548 *** `font-lock-defaults-alist' (`font-lock-defaults')
3549 *** `e' (`float-e').
3551 ** The following obsolete files were removed:
3552 sc.el, x-menu.el, rnews.el, rnewspost.el
3554 ** The format of the finder-inf.el file has changed, since the Finder
3555 mechanism is now based on the package system. The variable
3556 `finder-package-info' is replaced by `package--builtins' and
3557 `finder-keywords-hash'.
3559 ** When generating autoloads, `update-directory-autoloads' no longer
3560 assumes every inspected file is in your `load-path'. It instead
3561 generates relative names according to the current `load-path'.
3564 * Lisp Changes in Emacs 24.1
3566 ** Code can now use lexical scoping by default instead of dynamic scoping.
3567 The `lexical-binding' variable enables lexical scoping for local
3568 variables. It is typically set via a file-local variable in the first
3569 line of the file, in which case it applies to all the code in that
3572 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3573 binding instead of the old dynamic binding mode.
3575 *** Lexically scoped interpreted functions are represented with a new form
3576 of function value which looks like (closure ENV ARGS &rest BODY).
3578 *** New macro `letrec' to define recursive local functions.
3580 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3581 So do `defcustom' and other forms that call `defvar' as a subroutine.
3583 *** New function `special-variable-p' to check whether a variable is
3584 declared as dynamically bound.
3586 *** The form ((lambda ...) ...) is deprecated.
3588 ** An Emacs Lisp testing tool is now included.
3589 Emacs Lisp developers can use this tool to write automated tests for
3590 their code. See the ERT info manual for details.
3592 ** Changes for bidirectional display and editing
3594 *** New function `current-bidi-paragraph-direction'.
3595 This returns the base direction of the paragraph at point.
3597 *** New function `bidi-string-mark-left-to-right'.
3598 Given a string containing characters from right-to-left scripts, this
3599 function returns another string which can be safely inserted into a
3600 buffer, such that any following text will be always displayed to the
3601 right of that string. (This works by appending an invisible Unicode
3602 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3604 This is useful when the buffer has overall left-to-right paragraph
3605 direction and you need to insert a string whose contents are not known
3606 in advance, without disrupting the layout of the line.
3610 *** Window tree functions are accessible in Elisp.
3611 Functions are provided to return the parent, siblings or child windows
3612 of any window including internal windows (windows not associated with a
3613 buffer) in the window tree.
3615 **** New function `window-valid-p' gives non-nil for live and internal
3618 **** Window manipulation can deal with internal windows.
3619 Many window handling functions like `split-window', `delete-window', or
3620 `delete-other-windows' as well as the window resizing functions can now
3621 act on any window including internal ones.
3623 *** window-total-height/-width vs window-body-height/-width.
3624 The function `window-height' has been renamed to `window-total-height'
3625 and `window-width' has been renamed to `window-body-width'. The old
3626 names are provided as aliases. Two new functions `window-total-width'
3627 and `window-body-height' are provided.
3629 *** Window parameters specific to window handling functions.
3630 For each window you can specify a parameter to override the default
3631 behavior of a number of functions like `split-window', `delete-window'
3632 and `delete-other-windows'. The variable `ignore-window-parameters'
3633 allows to ignore processing such parameters.
3635 *** New semantics of third argument of `split-window'.
3636 The third argument of `split-window' has been renamed to SIDE and can be
3637 set to any of the values 'below, 'right, 'above, or 'left to make the
3638 new window appear on the corresponding side of the window that shall be
3639 split. Any other value of SIDE will cause `split-window' to split the
3640 window into two side-by-side windows as before.
3642 *** Window resizing functions.
3643 A new standard function for resizing windows called `window-resize' has
3644 been introduced. This and all other functions for resizing windows no
3645 longer delete any windows when they become too small.
3647 *** Deleting the selected window now selects the most recently selected
3648 live window on that frame instead.
3650 *** `adjust-window-trailing-edge' adjustments.
3651 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3652 is able to resize other windows if a window adjacent to the trailing
3653 edge cannot be shrunk any more. This makes its behavior more similar to
3654 that of Emacs 21 without compromising, however, its inability to delete
3655 windows which was introduced in Emacs 22.
3657 *** Window-local buffer lists.
3658 Windows now have local buffer lists. This means that removing a buffer
3659 from display in a window will preferably show the buffer previously
3660 shown in that window with its previous window-start and window-point
3661 positions. This also means that the same buffer may be automatically
3662 shown twice even if it already appears in another window.
3664 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3665 which if non-nil requires the buffer to be displayed in the currently
3666 selected window, signaling an error otherwise. If nil, another window
3667 can be used, e.g. if the selected one is strongly dedicated.
3669 *** `split-window-vertically' and `split-window-horizontally' renamed
3670 to `split-window-below' and `split-window-right' respectively.
3671 The old names are kept as aliases.
3675 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3676 named ACTION, and takes a display action of the same form as
3677 `display-buffer-base-action' (see Changes, above). A non-nil,
3678 non-list value is treated specially, as the old meaning.
3680 **** New variable `display-buffer-overriding-action'.
3682 **** The procedure of `display-buffer' etc. to choose a window is
3683 determined by combining `display-buffer-overriding-action',
3684 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3685 and `display-buffer-fallback-action'. The second and fourth of these
3686 are user-customizable variables.
3688 See the docstring of `display-buffer' for details.
3690 *** New functions `window-state-get' and `window-state-put'.
3691 These functions allow to save and restore the state of an arbitrary
3692 frame or window as an Elisp object.
3696 *** New variable `completion-extra-properties' used to specify extra
3697 properties of the current completion:
3698 - :annotate-function, same as the old completion-annotate-function.
3699 - :exit-function, function to call after completion took place.
3701 *** Functions on `completion-at-point-functions' can return any of the
3702 properties valid for `completion-extra-properties'.
3704 *** `completion-annotate-function' is obsolete.
3706 *** New `metadata' method for completion tables. The metadata thus returned
3707 can specify various details of the data returned by `all-completions':
3708 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3709 used to select a style in completion-category-overrides.
3710 - `annotation-function' to add annotations in *Completions*.
3711 - `display-sort-function' to specify how to sort entries in *Completions*.
3712 - `cycle-sort-function' to specify how to sort entries when cycling.
3714 *** `minibuffer-local-filename-must-match-map' is not used any more.
3715 Instead, the bindings in `minibuffer-local-filename-completion-map'
3716 are combined with `minibuffer-local-must-match-map'.
3718 *** New variable `completing-read-function' allows overriding the
3719 behavior of `completing-read'.
3721 ** `glyphless-char-display' can now distinguish between graphical and
3722 text terminal display, via a char-table entry that is a cons cell.
3724 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3725 Instead, the offending function is removed.
3729 *** New function `run-hook-wrapped' for running an abnormal hook by
3730 passing the hook functions as arguments to a "wrapping" function.
3731 Like `run-hook-with-args-until-success', it stops at the first
3732 non-nil return value.
3734 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3735 set of "wrapping" filters, similar to around advice.
3736 (A version of this macro was actually added in Emacs 23.2 but was not
3737 advertised at the time.)
3741 *** New macro `condition-case-unless-debug' (this was actually added in
3742 Emacs 23.1 as condition-case-no-debug, but not advertised)
3744 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3746 *** Variable `stack-trace-on-error' removed.
3748 *** The debugger can now "continue" from an error, which means it will
3749 jump to the error handler as if the debugger had not been invoked
3750 instead of jumping all the way to the top-level.
3752 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3753 This can be useful when `inhibit-quit' is set.
3755 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3756 named Emacs server instances.
3758 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3759 to redirect STDOUT to a file.
3761 ** The function `format-time-string' now supports the %N directive,
3762 for higher-resolution time stamps.
3764 ** New input reading functions
3766 *** New function `read-char-choice' reads a restricted set of
3767 characters, discarding any inputs not inside the set.
3769 *** The command `read-color' now requires a match for a color name
3770 or RGB triplet, instead of signaling an error if the user provides
3773 **** `facemenu-read-color' is now an alias for `read-color'.
3775 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3776 The variable is now used to load all kind of supported dynamic libraries,
3777 not just image libraries. The previous name is still available as an
3780 ** Syntax parsing changes
3782 *** New variable `syntax-propertize-function'.
3783 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3784 This allows syntax-table properties to be set independently from font-lock:
3785 just call syntax-propertize to make sure the text is propertized.
3786 Together with this new variable come a new hook
3787 syntax-propertize-extend-region-functions, as well as two helper functions:
3788 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3789 as-is; and syntax-propertize-rules which provides a new way to specify
3792 *** Syntax tables support a new "comment style c" additionally to style b.
3794 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3796 ** frame-local variables cannot be let-bound any more.
3798 ** Major and minor mode changes
3800 *** `set-auto-mode' now respects mode: local variables at the end of files,
3801 as well as those in the -*- line.
3803 *** `prog-mode' is a new major mode from which programming modes
3806 **** `prog-mode-hook' can be used to enable features for programming
3807 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3808 on-the-fly spell checking for comments and strings.
3810 *** New hook `change-major-mode-after-body-hook', run by
3811 `run-mode-hooks' just before any other mode hooks.
3813 *** Enabled globalized minor modes can be disabled in specific major modes.
3814 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3815 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3817 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3819 ** File-handling changes
3821 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3822 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3823 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3824 argument is supplied (see Trash changes, above).
3826 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3828 ** Tool-bars can display separators.
3829 Tool-bar separators are handled like menu separators in menu-bar maps,
3830 i.e. via menu entries of the form `(menu-item "--")'.
3834 *** Animated images support (currently animated gifs only).
3836 **** `image-animated-p' returns non-nil if an image can be animated.
3838 **** `image-animate' animates a supplied image spec.
3840 **** `image-animate-timer' returns the timer object for an image that
3843 *** `image-extension-data' has been renamed to `image-metadata'.
3844 The old name is an obsolete alias to the new one.
3846 *** Image mode can view any image type that ImageMagick supports.
3847 This requires Emacs to be built with ImageMagick support.
3849 **** New function `imagemagick-types', defined if ImageMagick support
3850 is enabled, returns a list of image file extensions that your
3851 ImageMagick installation supports.
3853 **** New function `imagemagick-register-types' enables ImageMagick
3854 image types in Image mode and in `create-image' and other helper
3857 **** New option `imagemagick-types-inhibit' excludes certain
3858 ImageMagick image types from `imagemagick-register-types'.
3860 **** With ImageMagick support, there are extra Image mode commands to
3861 resize and rotate images: `image-transform-fit-to-height',
3862 `image-transform-fit-to-width', `image-transform-set-rotation', and
3863 `image-transform-set-scale'.
3865 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3866 passes it to the mail user agent function. This argument specifies an
3867 action for returning to the caller after finishing with the mail. For
3868 example, this is used by Rmail to optionally delete a mail window.
3870 ** XML and HTML parsing
3871 If Emacs is compiled with libxml2 support, there are two new
3872 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3873 and `libxml-parse-xml-region' (which parses XML). Both return an
3874 Emacs Lisp parse tree.
3876 ** Networking and encryption changes
3878 *** `open-network-stream' can now be used to open an encrypted stream.
3879 It now accepts an optional `:type' parameter for initiating a TLS
3880 connection, directly or via STARTTLS. To do STARTTLS, additional
3881 parameters (`:end-of-command', `:success', `:capabilities-command')
3882 must also be supplied.
3884 *** New library gnutls.el.
3885 The new function `gnutls-available-p' returns non-nil if Emacs is
3886 built with GnuTLS support. The main entry points are
3887 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3888 these functions through `open-network-stream', because that can
3889 upgrade connections through STARTTLS opportunistically or use plain
3890 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3893 *** New primitive `secure-hash' that supports many secure hash algorithms:
3894 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3895 sha1.el has been removed. The `sha1' feature is provided by default.
3899 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3901 ** Progress reporters can now "spin".
3902 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3903 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3904 time you call `progress-reporter-update' on that progress reporter,
3905 with a nil or omitted VALUE argument, the reporter message is
3906 displayed with a "spinning bar".
3908 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3909 being reverted, even if the buffer has a local `revert-buffer-function'.
3911 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3912 If delayed-warnings-list is non-nil, the command loop calls
3913 `delayed-warnings-hook' after `post-command-hook'. At present, this
3914 is only used by Emacs on some platforms to display warnings during
3915 startup, which might otherwise not be noticed. This uses the
3916 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3918 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3920 ** New function `make-composed-keymap' that constructs a new keymap
3921 from multiple input maps. You can use this to make a keymap that
3922 inherits from multiple maps, eg:
3923 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3925 ** New function `string-prefix-p'.
3926 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3928 ** New reader macro ## that stands for the empty symbol.
3929 This means that the empty symbol can now be read back. Also, #: by itself
3930 (when not immediately followed by a possible symbol character) stands for
3931 an empty uninterned symbol.
3933 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3935 ** The following functions and variables are obsolete:
3937 *** `tooltip-use-echo-area' is obsolete.
3938 Rather than setting this to t, disable Tooltip mode instead.
3940 *** buffer-substring-filters is obsolete.
3941 Use `filter-buffer-substring-functions' instead.
3943 *** `byte-compile-disable-print-circle' is obsolete.
3945 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3946 Use `post-command-hook' instead.
3948 *** `font-lock-maximum-size' is obsolete.
3951 * Changes in Emacs 24.1 on Non-Free Operating Systems
3953 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3954 and also when HOME is set to C:\ by default.
3956 ** New configure.bat options
3958 *** --enable-checking builds Emacs with extra runtime checks.
3960 *** --distfiles specifies files to be included in binary distribution.
3962 *** --without-gnutls disables automatic GnuTLS detection.
3964 *** --lib for general library linkage, works with the USER_LIBS build variable.
3966 ** New make target `dist' to create binary distribution for MS Windows.
3968 ** The Lisp function `w32-default-color-map' is now obsolete.
3969 (It is only used internally in the Emacs C code.)
3971 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3972 reappear on mouse-over. (Requires OS X 10.6 or later.)
3974 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3975 other platforms, rather than inserting its contents into the buffer.
3978 ----------------------------------------------------------------------
3979 This file is part of GNU Emacs.
3981 GNU Emacs is free software: you can redistribute it and/or modify
3982 it under the terms of the GNU General Public License as published by
3983 the Free Software Foundation, either version 3 of the License, or
3984 (at your option) any later version.
3986 GNU Emacs is distributed in the hope that it will be useful,
3987 but WITHOUT ANY WARRANTY; without even the implied warranty of
3988 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3989 GNU General Public License for more details.
3991 You should have received a copy of the GNU General Public License
3992 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3997 paragraph-separate: "[
\f]*$"