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
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
31 FIXME? Should be --without-acl?
33 ** Emacs can now be compiled with file notification support.
34 This happens by default if a suitable system library is found at
35 build time. To prevent this, use the configure option
36 `--without-file-notification'. See below for file-notify features.
37 FIXME? This feature is not available for the Nextstep port. (?)
40 ** The configure option `--without-compress-info' has been generalized,
41 and renamed to `--without-compress-install'. It now prevents compression
42 of _any_ files during installation.
45 ** The configure option `--with-crt-dir' has been removed.
46 It is no longer needed, as the crt*.o files are no longer linked specially.
49 ** Directories passed to configure option `--enable-locallisppath' are
50 no longer created during installation.
52 ** Emacs can be compiled with zlib support.
53 If this library is present (which it normally is on most systems), the
54 function `zlib-decompress-region' becomes available, which can
55 decompress gzip- and zlib-format compressed data.
58 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
59 This requires pkg-config to be available at configure time.
62 * Startup Changes in Emacs 24.4
65 ** When initializing `load-path', an empty element in the EMACSLOADPATH
66 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
67 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
68 load-path (the one that would have been used if EMACSLOADPATH was unset).
69 This makes it easier to _extend_ the load-path via EMACSLOADPATH
70 (previously, EMACSLOADPATH had to specify the complete load-path,
71 including the defaults). (In older versions of Emacs, an empty element
72 was replaced by ".", so use an explicit "." now if that is what you want.)
75 ** The -L option, which normally prepends its argument to load-path,
76 will instead append, if the argument begins with `:' (or `;' on MS Windows;
77 i.e., `path-separator').
80 ** If you use either site-load.el or site-init.el to customize the dumped
81 Emacs executable, any changes to `load-path' that these files make
82 will no longer be present after dumping. To affect a permanent change
83 to `load-path', use the `--enable-locallisppath' option of `configure'.
86 ** The user option `initial-buffer-choice' can now specify a function
87 to set up the initial buffer.
90 * Changes in Emacs 24.4
93 ** New option `gnutls-verify-error', if non-nil, means that Emacs
94 should reject SSL/TLS certificates that GnuTLS determines as invalid.
95 (This option defaults to nil at present, but this is expected to change
99 ** Emacs now supports menus on text-mode terminals.
100 If the terminal supports a mouse, clicking on the menu bar, or on
101 sensitive portions of the mode line or header line, will drop down the
102 menu defined at that position. Likewise, clicking C-mouse-2 or
103 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
106 If the text terminal does not support a mouse, you can activate the
107 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
109 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
110 customize the option `tty-menu-open-use-tmm' to a non-nil value.
111 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
115 ** The *Messages* buffer is created in `messages-buffer-mode',
116 a new major mode, with read-only status. Any code that might create
117 the *Messages* buffer should call the function `messages-buffer' to do
118 so and set up the mode.
120 ** Emacs now supports ACLs (access control lists).
122 *** Emacs preserves the ACL entries of files when backing up.
124 *** New functions `file-acl' and `set-file-acl' get and set the ACL
125 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
126 libacl. On MS-Windows, the NT Security APIs are used to emulate the
127 POSIX ACL interfaces.
129 ** Multi-monitor support has been added.
132 *** New functions `display-monitor-attributes-list' and
133 `frame-monitor-attributes' can be used to obtain information about
134 each physical monitor on multi-monitor setups.
136 *** The functions `display-pixel-width' and `display-pixel-height' now
137 behave consistently among the platforms: they return the pixel width
138 or height for all physical monitors associated with the given display
139 as if they were on X11. To get information for each physical
140 monitor, use the new functions above. Similar notes also apply to
141 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
142 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
145 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
146 You can change the default by customizing `blink-cursor-blinks'.
149 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
150 This affects View mode, etc.
155 *** The command `apropos-variable' is renamed to `apropos-user-option'.
156 `apropos-user-option' shows all user options while `apropos-variable'
157 shows all variables. When called with a universal prefix argument,
158 the two commands swap their behaviors. When `apropos-do-all' is
159 non-nil, they output the same results.
162 *** The key `?' now describes prefix bindings, like `C-h'.
165 *** The command `describe-function' has been extended for EIEIO.
166 Running it on constructors will show a full description of the
167 generated class. For generic functions, it will show all
168 implementations together with links to the source. The old commands
169 `describe-class', `describe-constructor' and `describe-generic' were
173 *** The function `quail-help' is no longer an interactive command.
174 Use `C-h C-\' (`describe-input-method') instead.
179 *** ImageMagick images now support the :max-width and :max-height keywords.
182 *** When using `create-image' with image data, you can pass a :format
183 attribute (via the property-list argument) in order to help
184 ImageMagick detect the image type. The value should be a MIME
185 content-type that is found in the new variable `image-format-suffixes'.
187 ** Frame and window changes
190 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
191 bound to <f11> and M-<f10>, respectively.
194 *** New hooks `focus-in-hook', `focus-out-hook'.
195 These are normal hooks run when an Emacs frame gains or loses input focus.
197 *** Emacs can now change frame sizes in units of pixels, rather than
198 text rows or columns. When maximizing a frame or making it fullscreen,
199 remaining extra pixels are no longer given to the minibuffer, the rightmost
200 fringe, or other unusable space, but are distributed among the text
201 areas of the frame's windows. If the new option `frame-resize-pixelwise'
202 is non-nil, all frame size changes happen pixelwise and set the
203 corresponding size hints for the window manager.
205 *** Emacs can now change window sizes in units of pixels.
206 Mouse-dragging a mode line or window divider now changes the size of
207 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
208 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
209 resize windows pixelwise. Most functions for changing or accessing
210 window sizes now have an additional argument that allows changes to apply,
211 or values to be returned, in pixels instead of lines/columns.
213 *** Emacs can now draw dividers between adjacent windows. To put
214 dividers between side-by-side/vertically stacked windows customize the
215 frame parameters `right-divider-width' and `bottom-divider-width' to
216 some positive integer. You can drag dividers with the mouse (they show
217 a corresponding cursor when the mouse hovers over them). You can change
218 the appearance of dividers by customizing the faces `window-divider',
219 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
220 two are useful to provide a 3D effect, or to better distinguish dividers
221 from surrounding display objects.
223 *** New functions are provided to return the pixel sizes of window
224 components, namely `window-scroll-bar-width', `window-mode-line-height'
225 `window-header-line-height', `window-right-divider-width' and
226 `window-bottom-divider-width'.
228 *** The new function `window-text-pixel-size' returns the size of the
229 text of a window's buffer in pixels. This allows functions like
230 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
231 window to its buffer as it will be displayed.
233 *** `fit-window-to-buffer' can now resize windows horizontally.
234 This behavior is controlled by the new option
235 `fit-window-to-buffer-horizontally'.
237 *** `fit-frame-to-buffer' can now fit frames in both directions.
238 This behavior is controlled by the option `fit-frame-to-buffer' which
239 tells in which direction(s) the frame shall be fit. The new options
240 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
241 control the size of the frame and its position on screen.
243 *** Temp Buffer Resize Mode can now adjust height and width of windows
244 and frames. `temp-buffer-resize-mode' is now able to adjust the height
245 and the width of a window displaying a temporary buffer. The new option
246 `temp-buffer-max-width' allows to control the width of temporary buffer
247 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
248 and the buffer appears in the root window of a frame, Temp Buffer Resize
249 Mode will try to adjust width and/or height of the frame.
252 *** `split-window' is now a non-interactive function, not a command.
253 As a command, it was a special case of `C-x 2' (`split-window-below'),
254 and as such superfluous. After being reimplemented in Lisp, its
255 interactive form was mistakenly retained.
258 *** The functions `window-size' and `window-total-size' now have an
259 optional argument to return a rounded size value.
262 *** `window-state-put' now allows to put a window state into internal
266 *** New option `scroll-bar-adjust-thumb-portion'.
267 Available only on X, this option allows to control over-scrolling
268 using the scroll bar (i.e. dragging the thumb down even when the end
269 of the buffer is visible).
272 *** New basic action function `display-buffer-in-previous-window' has
273 `display-buffer' display a buffer in a window previously showing that
277 *** New basic action function `display-buffer-at-bottom' has
278 `display-buffer' choose or make a window at the bottom of the selected
281 ** Lisp evaluation changes
283 *** `eval-defun' on an already defined defcustom calls the :set function,
287 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
288 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
289 zero prefix argument. This disables truncation of lists in the output,
290 equivalent to setting `(eval-expression-)print-length' and
291 `(eval-expression-)print-level' to nil. Additionally, it causes integers
292 to be printed in other formats (octal, hexadecimal, and character).
295 *** New hook `eval-expression-minibuffer-setup-hook' run by
296 `eval-expression' on entering the minibuffer.
299 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
302 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
303 because it affects caching of paragraph scanning results as well.
304 There is no reason to set this to nil except for debugging purposes.
307 ** The option `set-mark-default-inactive' has been deleted.
308 This unfinished feature was introduced by accident in Emacs 23.1;
309 simply disabling Transient Mark mode does the same thing.
312 ** The default value of `comment-use-global-state' is now t,
313 and this variable has been marked obsolete.
316 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
317 and works for git too, if you fetch the repository notes.
320 ** New option `load-prefer-newer' affects how the `load' function chooses
321 the file to load. If this is non-nil, then when both .el and .elc
322 versions of a file exist, and the caller did not explicitly specify
323 which one to load, then the newer file is loaded. The default, nil,
324 means to always load the .elc file.
327 * Editing Changes in Emacs 24.4
329 ** Indentation changes
332 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
333 When invoked without a prefix argument, it now activates a transient
334 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
335 the text indentation in the region. Typing any other key resumes
336 normal editing behavior.
338 *** `electric-indent-mode' is enabled by default.
341 *** `tab-stop-list' is now implicitly extended to infinity by repeating
342 the last step. Its default value is changed to nil, which means a tab
343 stop every `tab-width' columns.
346 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
347 When called in succession, it cycles between spacing conventions:
348 one space, no spaces, original spacing.
351 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
352 a line after a one-letter word, which is an error in some typographical
353 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
356 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
358 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
359 Most commands are still unaware of it, but kill/yank do work on the rectangle.
362 ** New option `visual-order-cursor-movement'.
363 If this is non-nil, cursor motion with arrow keys will follow the
364 visual order of characters on the screen: <left> always moves to the
365 left, <right> always moves to the right, disregarding the surrounding
366 bidirectional context.
371 *** All interactive commands that read a register (`copy-to-register', etc.)
372 now display a temporary window after `register-preview-delay' seconds
373 that summarizes existing registers. To disable this, set that option to nil.
374 Interactive commands that read registers and want to make use of this
375 should use `register-read-with-preview' to read register names.
378 *** New command `frameset-to-register' bound to `C-x r f', replacing
379 `frame-configuration-to-register'. It offers similar functionality,
380 plus enhancements like the ability to restore deleted frames.
381 (`frame-configuration-to-register' still exists, but no longer has a
385 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
389 ** New command `delete-duplicate-lines'.
390 This searches the region for identical lines, and removes all but one
391 copy of each repeated line. The lines need not be sorted.
394 * Changes in Specialized Modes and Packages in Emacs 24.4
397 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
399 ~/.emacs.d/timelog replaces ~/.timelog
400 ~/.emacs.d/vip replaces ~/.vip
401 ~/.emacs.d/viper replaces ~/.viper
402 ~/.emacs.d/ido.last replaces ~/.ido.last
403 ~/.emacs.d/kkcrc replaces ~/.kkcrc
404 ~/.emacs.d/quickurls replaces ~/.quickurls
405 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
406 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
407 ~/.emacs.d/places replaces ~/.emacs-places
408 ~/.emacs.d/shadows replaces ~/.shadows
409 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
410 ~/.emacs.d/strokes replaces ~/.strokes
411 ~/.emacs.d/notes replaces ~/.notes
412 ~/.emacs.d/type-break replaces ~/.type-break
413 Also the following files used by the now obsolete otodo-mode.el:
414 ~/.emacs.d/todo-do replaces ~/.todo-do
415 ~/.emacs.d/todo-done replaces ~/.todo-done
416 ~/.emacs.d/todo-top replaces ~/.todo-top
418 ** Backtrace and debugger
421 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
422 display of local variables of the current stack frame.
424 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
425 the lexical environment when evaluating the code in the context at point
426 (and so allows you to access lexical variables).
429 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
432 ** Battery information can now be retrieved from BSD's `apm' utility.
435 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
437 ** Calendar and Diary
440 *** New faces `calendar-weekday-header', `calendar-weekend-header',
441 and `calendar-month-header'.
444 *** New option `calendar-day-header-array'.
447 *** New variable `diary-from-outlook-function', used by the command
448 `diary-from-outlook'.
451 *** The variable `calendar-font-lock-keywords' is obsolete.
456 *** Calc by default now uses the Gregorian calendar for all dates, and
457 uses January 1, 1 AD as its day number 1. Previously Calc used the
458 Julian calendar for dates before September 14, 1752, and it used
459 December 31, 1 BC as its day number 1; the new scheme is more
460 consistent with Calendar's calendrical system and day numbering.
463 *** The new option `calc-gregorian-switch' lets you configure if
464 (and when) Calc switches from the Julian to the Gregorian calendar.
467 *** Support for ISO 8601 dates.
473 **** The cpp-root project now supports executing a compile command.
474 It can be set through the new :compile-command slot or the
475 buffer-local variable `compile-command'.
477 **** Better selection of include directories for the 'linux' project.
478 Include directories now support out-of-tree build directories and
479 target architecture auto-detection.
483 **** Improved detection of used namespaces in current scope in C++.
485 **** Parsing of default values for variables and function arguments in C/C++.
486 They are also displayed by the summarize feature in the mode line.
488 **** Improved parsing of function pointers in C/C++.
489 This also includes parsing of function pointers as function arguments.
491 **** Parsing of C/C++ preprocessor macros that open new scope.
492 For example, this enables parsing of macros that open new namespaces.
494 **** Support for 'this' pointer in inline member functions in C++.
499 *** New macro `cl-tagbody'.
500 This executes statements while allowing for control transfer to labels.
503 *** letf is now just an alias for cl-letf.
508 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
509 Hence, you can now enable it independently from those modes, and from
510 `transient-mark-mode'.
513 *** `cua-highlight-region-shift-only' is now obsolete.
514 You can disable `transient-mark-mode' to get the same result.
517 *** CUA's rectangles can now be used without CUA by calling the command
518 `cua-rectangle-mark-mode'.
523 *** Support for completion, ElDoc, and Flycheck has been added.
526 *** The current CFEngine syntax is parsed from "cf-promises -s json".
527 There is a fallback syntax available if you don't have cf-promises or
528 if your version doesn't support that option. See option `cfengine-cf-promises'.
531 ** Delete Selection mode can now be used without Transient Mark mode.
536 *** `desktop-save-mode' by default now auto-saves an existing desktop file
537 after `desktop-auto-save-timeout'. To disable this, customize that option
541 *** `desktop-restore-frames', enabled by default, allows saving and
542 restoring the frame/window configuration (frameset). Additional options
543 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
544 and `desktop-restore-forces-onscreen' offer further customization.
547 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
548 such as file ownership or permissions, are visible.
551 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
552 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
553 The results display in the mode line.
555 ** Electric Pair mode
558 *** New option `electric-pair-preserve-balance', enabled by default.
559 If non-nil, pairing/skipping only kicks in when that help the balance
560 of parentheses and quotes, i.e. the buffer should end up at least as
563 You can further control this behavior by adjusting the predicates
564 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
567 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
568 In `electric-pair-mode', the commands `backward-delete-char' and
569 `backward-delete-char-untabify' are now bound to electric variants
570 that delete the closer when invoked between adjacent pairs.
573 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
574 In `electric-pair-mode', inserting a newline between adjacent pairs
575 opens an extra newline after point, which is indented if
576 `electric-indent-mode' is also set.
579 *** New option `electric-pair-skip-whitespace', enabled by default.
580 This controls if skipping over closing delimiters should jump over any
581 whitespace slack. Setting it to `chomp' makes it delete this
582 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
585 *** New variables control the pairing in strings and comments.
586 You can customize `electric-pair-text-pairs' and
587 `electric-pair-text-syntax-table' to tweak pairing behavior inside
588 strings and comments.
591 ** New EPA option `epa-mail-aliases'.
592 You can set this to a list of email address aliases that `epa-mail-encrypt'
593 should use to find keys.
596 ** New ERC option `erc-accidental-paste-threshold-seconds'.
597 If set to a number, this can be used to avoid accidentally pasting large
598 amounts of data into the ERC input.
601 ** New ERT macro `skip-unless' allows skipping ERT tests.
602 See the ERT manual for details.
607 *** `eshell' now supports visual subcommands and options.
608 Eshell has been able to handle "visual" commands (interactive,
609 non-line oriented commands such as top that require display
610 capabilities not provided by eshell) by running them in an Emacs
611 terminal emulator. See `eshell-visual-commands'.
613 This feature has been extended to subcommands and options that make a
614 usually line-oriented command a visual command. Typical examples are
615 "git log" and "git <command> --help", which display their output in a
616 pager by default. See `eshell-visual-subcommands' and
617 `eshell-visual-options'.
620 *** New Eshell-Tramp module.
621 External su and sudo commands are now the default; the internal,
622 Tramp-using variants can still be used by enabling the eshell-tramp
626 ** New F90 mode option `f90-smart-end-names'.
629 Icomplete is now more similar to Ido.
632 *** Icomplete by default now applies to all forms of minibuffer completion.
633 The variable `icomplete-with-completion-tables' (now a user option)
634 controls this. To restore the old behavior, set it back to
635 '(internal-complete-buffer).
638 *** You can navigate through and select completions using the keys
639 from `icomplete-minibuffer-map'.
642 *** The string that separates potential completions is now a customizable
643 option (`icomplete-separator'). The default is " | " rather than ",".
646 *** New face `icomplete-first-match'; and new options
647 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
650 *** The option `icomplete-show-key-bindings' has been removed.
655 *** An Ido user manual is now included.
658 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
659 This means to use virtual buffers if the current ido input does not match
663 *** The variable `ido-decorations' can optionally have two new elements,
664 which are the brackets to use around the sole remaining completion.
669 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
670 visit the next image file and the previous image file in the same
671 directory, respectively.
674 *** New commands to show specific frames of multi-frame images.
675 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
676 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
679 *** New commands to speed up, slow down, or reverse animation.
680 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
681 speed up and slow down the animation. `a r' (`image-reverse-speed')
682 to reverse it and `a 0' (`image-reset-speed') to reset it.
685 *** The command `image-mode-fit-frame' deletes other windows.
686 When toggling, it restores the frame's previous window configuration.
687 It also has an optional frame argument, which can be used by Lisp
688 callers to fit the image to a frame other than the selected frame.
693 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
694 the symbol found near point.
697 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
698 will cycle through faces in `hi-lock-face-defaults' without prompting.
701 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
706 *** New Info face `info-index-match', used to highlight matches in index
707 entries displayed by `Info-index-next', `Info-virtual-index' and
711 *** The Info-edit command is obsolete. Editing Info nodes by hand
712 has not been relevant for some time.
717 *** New option `js-switch-indent-offset'.
720 *** Better indentation of multiple-variable declarations.
721 If a declaration spans several lines, variables on the following lines
722 are lined up to the first one.
725 *** Recognition and better indentation of continuations in array comprehensions.
728 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
733 *** Font locking for Texinfo comments and new keywords.
735 *** Completion in Octave file buffers.
739 *** Jump to definition.
741 *** Documentation lookup/search.
744 ** OPascal mode is the new name for Delphi mode
747 *** All delphi-* variables and functions have been renamed to opascal-*.
748 Obsolete aliases exist for those likely to have been used externally.
751 *** The option `delphi-newline-always-indents' has been removed.
752 Use `electric-indent-mode' instead.
755 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
760 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
761 to filter the list of packages by a keyword.
764 *** In the `describe-package' buffer, there are now buttons listing the
765 keywords related to the package. Click on a button to see other packages
766 related to that keyword.
769 *** The format of `archive-contents' files, generated by package
770 repositories, has changed to allow a new (fifth) element in the data
771 vectors, containing an associative list with extra properties.
772 (For example, `describe-package' uses the `:url' extra property to
773 display a "Homepage" header.)
776 ** In Prolog mode, `prolog-use-smie' has been removed,
777 along with the non-SMIE indentation code.
782 *** The new command `remember-notes' creates a buffer that is saved on exit.
783 You can use it as a more permanent *scratch* buffer.
786 *** Remember can now store notes in separate files.
787 To use this, add `remember-store-in-files' to the `remember-handler-functions'
788 option. The files are saved in `remember-data-directory' using
789 names specified by `remember-directory-file-name-format'.
794 *** Customize `rmail-mbox-format' to influence some minor aspects of
795 how Rmail displays non-MIME messages.
798 *** The `unrmail' command now converts from BABYL to mboxrd format,
799 rather than mboxo. Customize `unrmail-mbox-format' to change this.
804 *** Improved syntax highlighting and indentation.
807 *** New `electric-indent-mode' integration.
810 *** New option `ruby-encoding-magic-comment-style'.
813 *** New option `ruby-custom-encoding-magic-comment-template'.
816 *** New option `ruby-align-to-stmt-keywords'.
819 *** New option `ruby-align-chained-calls'.
822 *** More Ruby file types have been added to `auto-mode-alist'.
824 ** Search and Replace
827 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
828 starts a symbol (identifier) incremental search forward with the
829 symbol found near point added to the search string initially.
832 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
833 and adds it to the search string.
836 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
838 *** `query-replace' skips invisible text when `search-invisible' is nil,
839 and opens overlays with hidden text when `search-invisible' is `open'.
842 *** A negative prefix arg of replacement commands replaces backward.
843 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
844 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
847 *** By default, prefix arguments do not now terminate Isearch mode.
848 Set `isearch-allow-prefix' to nil to restore old behavior.
851 *** More Isearch commands accept prefix arguments, namely
852 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
856 *** Word search now matches whitespace at the beginning/end
857 of the search string if it contains leading/trailing whitespace.
858 In an incremental word search or when using a non-nil LAX argument
859 of `word-search-regexp', the lax matching can also match part of
860 the first word (in addition to the lax matching of the last word).
861 The same rules are now applied to the symbol search with the difference
862 that it matches symbols, and non-symbol characters between symbols.
865 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
868 ** The shell.el option `explicit-bash-args' includes --noediting by default.
869 All non-ancient Bash versions support this option.
874 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
877 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
879 ** SMIE indentation can be customized via `smie-config'.
880 Emacs can learn the appropriate indentation settings if you provide it
881 with an indented sample file.
886 *** Improved login monitoring and appropriate response to login failures.
887 New variable `sql-login-delay' defines maximum wait time for a connection.
890 SQL*Plus script placeholders are properly highlighted and identified
891 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
892 are passed before the logon parameter, as required. The default now
893 includes `-L', to limit the number of logon attempts per invocation.
896 ** New Term mode option `term-suppress-hard-newline'.
899 ** Todo mode has been rewritten and enhanced.
900 The Todo mode user manual describes all commands and most user
901 options. To support some of these features, a new file format is
902 used, which is incompatible with the old format; however, you can
903 convert old todo and done item files to the new format on initializing
904 the first new todo file, or at any later time with the provided
905 conversion command. The previous version of todo-mode.el has been
906 renamed to otodo-mode.el and is now obsolete. New features include:
908 *** Support for multiple todo files and archive files of done items.
910 *** Renaming, reordering, moving, merging, and deleting categories.
912 *** Sortable tabular summaries of categories and the item types they contain.
914 *** Cross-category lists of items filtered by specific criteria.
916 *** More fine-grained interaction with the Emacs diary, by being able to
917 decide for each todo item whether it appears in the Fancy Diary display.
919 *** Highly flexible new item insertion and item editing.
921 *** Moving items between categories, storing done items in their category
922 or in archive files, undoing or unarchiving done items.
924 *** Reprioritizing items by inputting a numerical priority.
926 *** Extensive customizability of operation and display, including many faces.
931 *** `trace-function' and `trace-function-background' no longer prompt for
932 the output buffer. Unless you use a prefix argument, they output to
936 *** With a prefix argument, `trace-function' and `trace-function-background'
937 will prompt for a "context". This is a Lisp expression, whose value at the
938 time the function is entered/exited is printed along with the function's
944 *** The experimental url syntax for remote file names has been removed.
947 *** New connection method "adb", which allows to access Android
948 devices by the Android Debug Bridge. The variable `tramp-adb-program'
949 can be used to adapt the path of the "adb" program, if needed.
952 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
953 "scpc" and "rsyncc" are discontinued. The ssh option
954 "ControlMaster=auto" is set automatically in all ssh-based methods,
955 when possible. See `tramp-use-ssh-controlmaster-options'.
958 *** Handlers for `file-acl' and `set-file-acl' for remote machines
959 which support POSIX ACLs.
962 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
963 for remote machines which support filesystem notifications.
966 ** New URL command `url-cookie-list' displays the current cookies,
967 and allows you to interactively remove cookies.
969 ** VC and related modes
972 *** In VC directory mode, `D' displays diffs between VC-controlled
973 whole tree revisions.
976 *** In VC directory mode, `L' lists the change log for the current VC
977 controlled tree in a window.
980 *** In VC directory mode, `I' shows a log of changes that will be
981 received with a pull operation.
984 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
985 under current version control system. When called with a prefix
986 argument, you can remove a file from the ignored file list.
991 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
994 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
997 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
998 are obsolete. Customize the `woman-*' faces instead.
1000 ** Obsolete packages
1003 *** iswitchb.el; use icomplete-mode.
1006 *** longlines.el; use visual-line-mode.
1015 *** terminal.el; use term.el instead.
1018 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1021 *** xesam.el (owing to the cancellation of the XESAM project).
1024 *** yow.el; use fortune.el or cookie1.el instead.
1027 * New Modes and Packages in Emacs 24.4
1030 ** New package `eww' is a built-in web browser.
1031 It is only available if Emacs is compiled with libxml2 support.
1034 ** New minor mode `superword-mode'.
1035 This overrides the default word motion commands to treat "symbol_words"
1036 as a single word, similar to what `subword-mode' does.
1039 ** New package nadvice.el offers lighter-weight advice facilities.
1042 *** add-function/remove-function, which can be used to add/remove code on any
1043 function-carrying place, such as process-filters or `<foo>-function' hooks.
1045 *** advice-add/advice-remove to add/remove a piece of advice on a named
1046 function, much like `defadvice' does.
1048 ** New package frameset.el.
1049 It provides a set of operations to save a frameset (the state of all
1050 or a subset of the existing frames and windows, somewhat similar to a
1051 frame configuration), both in-session and persistently, and restore it
1052 at some point in the future.
1055 ** New package filenotify.el provides an interface for file system
1056 notifications. It requires that Emacs be compiled with one of the
1057 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1060 * Incompatible Lisp Changes in Emacs 24.4
1063 ** `kill-region' has lost its `yank-handler' optional argument.
1066 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1067 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1070 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1073 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1074 Some languages match those as »...«, and others as «...», so it is
1075 better for Emacs to stay neutral by default.
1078 ** In compiled Lisp files, the header no longer includes a timestamp.
1081 ** The default file coding for Emacs Lisp files is now utf-8.
1082 (See `file-coding-system-alist'.) In most cases, this change is
1083 transparent, but files that contain unusual characters without
1084 specifying an explicit coding system may fail to load with obscure
1085 errors. You should either convert them to utf-8 or add an explicit
1089 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1090 It used to disable the minor mode, major mode, and text-property keymaps,
1091 whereas now it simply has higher precedence.
1094 ** Default process filters and sentinels are not nil any more.
1095 Instead they default to a function that does what the nil value used to do.
1098 ** `read-event' does not return decoded chars in ttys any more.
1099 As was the case in Emacs 22 and before, the decoding of terminal
1100 input, according to `keyboard-coding-system', is not performed in
1101 `read-event' any more. But unlike in Emacs 22, this decoding is still
1102 done before input-decode-map, function-key-map, etc.
1105 ** The option `inhibit-local-menu-bar-menus' has been removed.
1108 ** Frame-local variables that affect redisplay do not work any more.
1109 More specifically, redisplay does not bother to check for a frame-local
1110 value when looking up variables.
1113 ** nil and "unbound" are indistinguishable in `symbol-function'.
1114 `symbol-function' does not signal a `void-function' error any more.
1115 To determine if a symbol's function definition is void, use `fboundp'.
1118 ** `defadvice' does not honor the `freeze' flag and cannot advise
1119 special-forms any more.
1122 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1123 when lexical binding is enabled. Previously, VAR was bound to nil,
1124 which often led to spurious unused-variable warnings.
1127 ** The return value of `backup-buffer' has changed.
1128 The second argument is no longer an SELinux context, instead it is an
1129 alist of extended attributes as returned by the new function
1130 `file-extended-attributes'. The attributes can be applied to another
1131 file using `set-file-extended-attributes'.
1134 ** By default `copy-file' no longer copies file permission bits to an
1135 existing destination; and it sets the file permission bits of a newly
1136 created destination to those of the source, masked by the default file
1137 permissions. To copy the file permission bits, pass t as the
1138 PRESERVE-PERMISSIONS argument of `copy-file'.
1141 ** `visited-file-modtime' now returns -1 for nonexistent files.
1142 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1143 in the presence of files with negative time stamps.
1146 ** The cars of the elements in `interpreter-mode-alist' are now
1147 treated as regexps rather than literal strings.
1150 * Lisp Changes in Emacs 24.4
1153 ** The second argument of `eval' can now specify a lexical environment.
1156 ** New functions `special-form-p' and `macrop'.
1159 ** New macro `define-alternatives' can be used to define generic commands.
1160 Generic commands are interactive functions whose implementation can be
1161 selected among several alternatives, as a matter of user preference.
1164 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1165 on that symbol will use the associated value as a function to call
1169 ** New variable `enable-dir-local-variables'.
1170 Directory-local variables are ignored if this is nil. This may be
1171 useful for modes that want to ignore directory-locals while still
1172 respecting file-local variables.
1175 ** New function `get-pos-property'.
1178 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1179 as a function to call to provide default values.
1181 ** Completion changes
1184 *** The separator used by `completing-read-multiple' is now a regexp.
1185 The default `crm-separator' has been changed to allow surrounding spaces
1189 *** The `common-substring' argument of `display-completion-list',
1190 which has been documented as obsolete since Emacs 23.1, is now _really_
1191 obsolete, and no longer advertised. Instead use either
1192 `completion-all-completions', which returns highlighted strings (including
1193 for partial or substring completion), or call `completion-hilit-commonality'
1194 to add the highlight.
1197 *** New function `completion-table-with-cache' is a wrapper for
1198 `completion-table-dynamic' that caches the result of the last lookup.
1201 *** New function `completion-table-merge' to combine several
1202 completion tables by merging their completions.
1205 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1206 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1207 this replaces the string "lambda" with the Greek lambda character.
1212 *** Functions to pop up menus and dialogs now work on all terminals,
1213 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1214 `message-box', `yes-or-no-p', etc.
1216 The function `display-popup-menus-p' will now return non-nil for a
1217 display or frame whenever a mouse is supported on that display or
1221 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1224 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1225 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1229 *** New display action function `display-buffer-no-window' to not
1230 display the buffer in a window.
1232 *** New display action alist entry `allow-no-window' to indicate the
1233 caller of `display-buffer' is ready to handle the case of not
1234 displaying the buffer in a window.
1236 ** New hook `pre-redisplay-function'.
1239 ** New bool-vector set operation functions
1240 *** `bool-vector-exclusive-or'
1241 *** `bool-vector-union'
1242 *** `bool-vector-intersection'
1243 *** `bool-vector-set-difference'
1244 *** `bool-vector-not'
1245 *** `bool-vector-subsetp'
1246 *** `bool-vector-count-consecutive'
1247 *** `bool-vector-count-population'
1250 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1252 ** Error-handling changes
1255 *** New function `define-error'.
1258 *** `with-demoted-errors' takes an additional argument `format'.
1261 ** New macro `with-eval-after-load'.
1262 This is like the old `eval-after-load', but better behaved.
1265 ** New library subr-x.el with miscellaneous small utility functions
1266 *** `hash-table-keys'
1267 *** `hash-table-values'
1268 *** `string-blank-p'
1269 *** `string-empty-p'
1271 *** `string-reverse'
1272 *** `string-trim-left'
1273 *** `string-trim-right'
1275 *** `string-remove-prefix'
1276 *** `string-remove-suffix'
1279 ** Obsoleted functions
1282 *** `lisp-complete-symbol'
1283 *** `field-complete'
1284 *** `minibuffer-completion-contents'
1285 *** `isearch-nonincremental-exit-minibuffer'
1286 *** `isearch-filter-visible'
1287 *** `generic-make-keywords-list'
1288 *** `get-upcase-table' (use `case-table-get-table' instead).
1290 ** `with-wrapper-hook' is obsoleted by `add-function'.
1291 The few hooks that used with-wrapper-hook are replaced as follows:
1292 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1293 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1294 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1297 ** `byte-compile-interactive-only-functions' is now obsolete.
1298 To specify that a command should only be called interactively, give it
1299 a non-nil `interactive-only' property.
1302 ** `split-string' now takes an optional argument TRIM.
1303 The value, if non-nil, is a regexp that specifies what to trim from
1304 the start and end of each substring.
1307 ** New function `string-suffix-p'.
1309 ** File-handling changes
1312 *** Support for filesystem notifications.
1313 Emacs now supports notifications of filesystem changes, such as
1314 creation, modification, and deletion of files. This requires the
1315 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1316 MS-Windows systems, this is supported for Windows XP and newer
1320 *** The 9th element returned by `file-attributes' is now unspecified.
1321 Formerly, it was t if the file's gid would change if file were deleted
1322 and recreated. This value has been inaccurate for years on many
1323 platforms, and nobody seems to have noticed or cared.
1326 *** The 6th argument to `copy-file' has been renamed to
1327 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1328 Unix file permission bits as well as SELinux context.
1331 *** The function `file-ownership-preserved-p' now has an optional
1332 argument GROUP which causes it check for file group too. This can be
1333 used in place of the 9th element of `file-attributes'.
1336 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1337 argument, with the same interpretation as the returned value of
1338 `visited-file-modtime'.
1340 ** Autorevert changes
1343 *** If Emacs is compiled with file notification support, notifications
1344 are used instead of checking the time stamp of the files. You can
1345 disable this by setting the user option `auto-revert-use-notify' to
1346 nil. Alternatively, a regular expression of directories to be
1347 excluded from file notifications can be specified by
1348 `auto-revert-notify-exclude-dir-regexp'.
1351 *** The new user option `auto-revert-remote-files' enables reversion
1352 of remote files when set to non-nil.
1356 *** The function `face-spec-set' is now like `setq' for face specs.
1357 Its third arg now accepts values specifying a face spec type (defface,
1358 custom, or override spec), and the relevant spec is set accordingly.
1361 *** New function `add-face-text-property', which can be used to
1362 conveniently prepend/append new face properties.
1364 *** Face specs set via Custom themes now replace the `defface' spec
1365 rather than inheriting from it (as do face specs set via Customize).
1368 *** New face characteristic (supports :underline (:style wave))
1369 specifies whether or not the terminal can display a wavy line.
1372 *** New face spec attribute :distant-foreground
1373 specifies foreground to use if background color is near the foreground
1374 color that would otherwise have been used.
1379 *** `image-animated-p' is now `image-multi-frame-p'.
1380 It returns non-nil for any image that contains multiple frames,
1381 whether or not it specifies a frame delay.
1384 *** New variable `image-default-frame-delay' gives the frame delay for
1385 animated images which do not specify a frame delay.
1388 *** New functions `image-current-frame' and `image-show-frame' for getting
1389 and setting the current frame of a multi-frame image.
1394 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1395 **** object-name -> eieio-object-name
1396 **** object-class -> eieio-object-class
1397 **** object-class-fast -> eieio--object-class
1398 **** object-class-name -> eieio-object-class-name
1399 **** object-name-string -> eieio-object-name-string
1400 **** object-num-slots -> eieio--object-num-slots
1401 **** object-set-name-string -> eieio-object-set-name-string
1402 **** class-of -> eieio-object-class
1403 **** class-name -> eieio-class-name
1404 **** class-parent -> eieio-class-parent
1405 **** class-parents -> eieio-class-parents
1406 **** class-parents-fast -> eieio-class-parents-fast
1407 **** class-children -> eieio-class-children
1408 **** class-num-slots -> eieio--class-num-slots
1409 **** class-precedence-list -> eieio-class-precedence-list
1410 **** class-direct-subclasses -> eieio-class-children
1411 **** class-direct-superclasses -> eieio-class-parents
1413 ** Changes in encoding and decoding of text
1416 *** New coding-system `prefer-utf-8'.
1417 This is like `undecided' but prefers UTF-8 on decoding if the text to
1418 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1419 any non-ASCII characters are automatically encoded as UTF-8.
1422 *** New attributes of coding-systems whose type is `undecided'.
1423 Two new attributes, `:inhibit-null-byte-detection' and
1424 `:inhibit-iso-escape-detection', determine how to detect encoding of
1425 text that includes null bytes and ISO-2022 escape sequences,
1426 respectively. Each of these attributes can be either nil, zero, or
1427 t. If it is t, decoding text ignores null bytes and, respectively,
1428 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1429 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1430 text is encoded in one of the ISO-2022 encodings, such as
1431 iso-2022-7bit. If the value is zero, Emacs consults the variables
1432 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1434 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1435 UTF-8 encoding and decoding, whenever possible.
1437 These attributes are only meaningful for coding-systems of type
1438 `undecided'. (The type of a coding-system is determined by its
1439 `:coding-type' attribute and can be accessed by calling the
1440 `coding-system-type' function.)
1443 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1446 ** New functions `group-gid' and `group-real-gid'.
1449 ** The spelling of the rx.el category `chinese-two-byte' has been
1450 corrected (the first 'e' was missing).
1453 ** Minor internal changes to the details of lock files.
1454 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1455 If DIR/.#FILE already exists and is not an Emacs lock file,
1456 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1457 numbered lock files DIR/.#FILE.0...).
1458 On file systems that do not support symbolic links, the lock is now a
1459 regular file with contents being what would have been in the symlink.
1461 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1464 *** The package descriptor and name of global variables, constants,
1465 and functions should be separated by two hyphens if the symbol is not
1466 meant to be used by other packages.
1469 * Changes in Emacs 24.4 on Non-Free Operating Systems
1472 ** The procedure for building Emacs on MS-Windows has changed.
1473 It is now built by running the same configure script as on all other
1474 platforms. This requires the MSYS environment and MinGW development
1475 tools. See the updated instructions in nt/INSTALL for details.
1477 Using the Posix configure script and Makefile's also means a change in
1478 the directory structure of the Emacs installation on Windows. It is
1479 now the same as on GNU and Unix systems. In particular, the auxiliary
1480 programs, such as cmdproxy.exe and hexl.exe, are in
1481 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1482 version), version-independent site-lisp is in share/emacs/site-lisp,
1483 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1484 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1485 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1486 directories and will find the files in there automatically; there's no
1487 need to set any variables due to this change.)
1490 ** Emacs on Windows 2000 and later can now access files and directories
1491 whose names cannot be encoded in the current system codepage.
1493 The new variable `w32-unicode-filenames' controls this feature: if it
1494 is t, Emacs uses Unicode APIs to pass file names to system calls,
1495 which lifts the limitation of file names to the current locale.
1498 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1499 The backtrace is written to the 'emacs_backtrace.txt' file in the
1500 directory where Emacs was running.
1503 ** The variable `buffer-file-type' is no longer supported.
1504 Setting it has no effect, and %t in the mode-line format is ignored.
1505 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1506 modifying it has no effect.
1509 ** Lock files now work on MS-Windows.
1510 This helps to prevent losing your edits if the same file is being
1511 edited in another Emacs session or by another user. See the node
1512 "Interlocking" in the Emacs User Manual for the details. To disable
1513 file locking, customize `create-lockfiles' to nil.
1515 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1516 GNUstep and Mac OS X 10.4 use the old font backend.
1517 To use the old backend by default, do on the command line:
1518 % defaults write org.gnu.Emacs FontBackend ns
1520 ** Improved fullscreen support on Mac OS X.
1521 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1522 Customize `ns-use-native-fullscreen' to change the style.
1523 For Mac OS X 10.7 and newer, native is the default.
1525 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1526 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1527 does not apply to images.
1530 * Installation Changes in Emacs 24.3
1532 ** The default X toolkit is now Gtk+ version 3.
1533 If you don't pass `--with-x-toolkit' to configure, or if you use
1534 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1535 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1536 You can explicitly require a specific version by passing
1537 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1539 ** New configure option `--enable-link-time-optimization', to utilize
1540 an appropriate feature provided by GCC since version 4.5.0.
1542 ** New configure option `--without-all' to disable most of the optional
1543 features (image support, etc.) that are normally enabled by default.
1545 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1546 Emacs). If building with GCC, this enables compile-time checks that
1547 warn/give errors about possibly-questionable C code. On a recent GNU
1548 system there should be no warnings; on older and on non-GNU systems
1549 the results may be useful to developers.
1551 ** The configure option `--enable-use-lisp-union-type' has been
1552 renamed to `--enable-check-lisp-object-type', as the resulting
1553 Lisp_Object type no longer uses a union to implement the compile time
1554 check that this option enables.
1556 ** The configure option `--disable-maintainer-mode' has been removed,
1557 as it was confusingly-named and rarely useful.
1559 ** The configure options `--program-prefix', `--program-suffix', and
1560 `--program-transform-name' apply to more than just the installed
1561 binaries. Now they also affect the man pages, icons, and the
1562 etc/emacs.desktop file; but not the info pages, since this would break
1563 links between the various manuals.
1565 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1566 overwriting "emacs" in the installation bin/ directory with a link
1569 ** Emacs uses libtinfo in preference to libncurses, if available.
1571 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1572 /usr/pkg/lib to the linker search path. You must add them yourself if
1575 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1576 (from the bin and libexec directories, respectively). The former is
1577 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1580 * Startup Changes in Emacs 24.3
1582 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1583 lisp/ directory. There should not be any there anyway. If you have
1584 been adding them there, put them somewhere else; e.g., site-lisp.
1586 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1589 * Changes in Emacs 24.3
1593 *** `C-h f' (`describe-function') can now perform autoloading.
1594 When this command is called for an autoloaded function whose docstring
1595 contains a key substitution construct, that function's library is
1596 automatically loaded, so that the documentation can be shown
1597 correctly. To disable this, set `help-enable-auto-load' to nil.
1599 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1600 even after their associated libraries have been loaded (and the
1601 autoloads have been redefined as functions).
1605 *** Images displayed via ImageMagick now support transparency and the
1606 :background image specification property.
1608 *** When available, ImageMagick support is automatically enabled.
1609 It is no longer necessary to call `imagemagick-register-types'
1610 explicitly to install ImageMagick image types; that function is called
1611 automatically at startup, or when customizing an imagemagick- option.
1613 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1614 ImageMagick to view images. (You must call `imagemagick-register-types'
1615 afterwards if you do not use customize to change this.)
1617 *** The new variable `imagemagick-enabled-types' also affects which
1618 ImageMagick types are treated as images. The function
1619 `imagemagick-filter-types' returns the list of types that will be
1624 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1625 next and previous path separator, respectively.
1627 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1628 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1629 non-nil before enabling the mode.
1633 *** New option `mode-line-default-help-echo' specifies the help text
1634 (shown in a tooltip or in the echo area) for any part of the mode line
1635 that does not have its own specialized help text.
1637 *** You can now click mouse-3 in the coding system indicator to invoke
1638 `set-buffer-file-coding-system'.
1640 ** Server and client
1642 *** emacsclient now obeys string values for `initial-buffer-choice',
1643 if it is told to open a new frame without specifying any file to visit
1644 or expression to evaluate.
1646 *** New option `server-auth-key' specifies a shared server key.
1648 ** Emacs now generates backtraces on fatal errors.
1649 On encountering a fatal error, Emacs now outputs a textual description
1650 of the fatal signal, and a short backtrace on platforms like glibc
1651 that support backtraces.
1653 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1654 This minor mode replaces `toggle-read-only', which is now obsolete.
1656 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1657 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1658 respectively, without exiting from the prompt.
1660 ** In the Package Menu, newly-available packages are listed as "new",
1661 and sorted above the other "available" packages by default.
1663 ** If your Emacs was built from a repository checkout, the new variable
1664 `emacs-bzr-version' contains information about the bzr revision used.
1666 ** New option `create-lockfiles' specifies usage of lockfiles.
1667 It defaults to t. Changing it to nil inhibits the creation of lock
1668 files (use this with caution).
1670 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1671 variables on remote hosts.
1673 ** The entry for PCL-CVS has been removed from the Tools menu.
1674 The PCL-CVS commands are still available via the keyboard.
1676 ** Using "unibyte: t" in Lisp source files is obsolete.
1677 Use "coding: raw-text" instead.
1679 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1680 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1681 The previous binding, introduced in Emacs 24.1, was a mistake, because
1682 `C-c LETTER' bindings are reserved for user customizations.
1684 ** Internationalization
1686 *** New language environment: Persian.
1688 *** New input method `vietnamese-vni'.
1690 ** Nextstep (GNUstep / Mac OS X) port
1692 *** Support for fullscreen and the frame parameter fullscreen.
1694 *** A file dialog is used for open/save operations initiated from the
1698 * Editing Changes in Emacs 24.3
1700 ** Search and Replace
1702 *** Non-regexp Isearch now performs "lax" space matching.
1703 Each sequence of spaces in the supplied search string may match any
1704 sequence of one or more whitespace characters, as specified by the
1705 variable `search-whitespace-regexp'. (This variable is also used by a
1706 similar existing feature for regexp Isearch.)
1708 *** New Isearch command `M-s SPC' toggles lax space matching.
1709 This applies to both ordinary and regexp Isearch.
1711 *** New option `replace-lax-whitespace'.
1712 If non-nil, `query-replace' uses flexible whitespace matching too.
1715 *** Global `M-s _' starts a symbol (identifier) incremental search,
1716 and `M-s _' in Isearch toggles symbol search mode.
1717 `M-s c' in Isearch toggles search case-sensitivity.
1719 ** Navigation commands
1721 *** New binding `M-g c' for `goto-char'.
1723 *** New binding `M-g TAB' for `move-to-column'.
1725 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1726 interactively with no prefix arg. Previously, it moved to column 1.
1728 ** New option `yank-handled-properties' allows processing of text
1729 properties on yanked text, in ways that are more general than just
1730 removing them (as is done by `yank-excluded-properties').
1732 ** New option `delete-trailing-lines' specifies whether
1733 M-x delete-trailing-whitespace should delete trailing lines at the end
1734 of the buffer. It defaults to t.
1736 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1738 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1739 `ucs-insert' is now an obsolete alias for `insert-char'.
1741 ** The `z' key no longer has a binding in most special modes.
1742 It used to be bound to `kill-this-buffer', but `z' is too easy to
1745 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1746 It copies the region-rectangle as the last rectangle kill.
1750 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1752 *** New option `register-separator' specifies the register containing
1753 the text to put between collected texts for use with
1754 M-x append-to-register and M-x prepend-to-register.
1757 * Changes in Specialized Modes and Packages in Emacs 24.3
1759 ** Common Lisp emulation (CL)
1761 *** CL's main entry is now (require 'cl-lib).
1762 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1763 i.e., all its definitions have the "cl-" prefix (and internal definitions
1764 use the "cl--" prefix).
1766 If `cl' provided a feature under the name `foo', then `cl-lib'
1767 provides it under the name `cl-foo' instead; with the exceptions of the
1768 few `cl' definitions that had to use `foo*' to avoid conflicts with
1769 pre-existing Elisp entities. These have been renamed to `cl-foo'
1770 rather than `cl-foo*'.
1772 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1773 provide the old, non-prefixed names. Some exceptions are listed below:
1775 *** `cl-flet' is not like `flet' (which is deprecated).
1776 Instead it obeys the behavior of Common-Lisp's `flet'.
1777 In particular, in cl-flet function definitions are lexically scoped,
1778 whereas in flet the scoping is dynamic.
1780 *** `cl-labels' is slightly different from `labels'.
1781 The difference is that it relies on the `lexical-binding' machinery
1782 (as opposed to the `lexical-let' machinery used previously) to capture
1783 definitions in closures, so such closures will only work if `lexical-binding'
1786 *** `cl-letf' is not exactly like `letf'.
1787 The only difference is in details that relate to some deprecated usage
1788 of `symbol-function' in place forms.
1790 *** `progv' was rewritten to use the `let' machinery.
1791 A side effect is that variables without corresponding values are bound
1792 to nil rather than being made unbound.
1794 *** The following methods of extending `setf' are obsolete
1795 (use features from gv.el instead):
1796 `define-modify-macro' (use `gv-letplace')
1797 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1798 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1799 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1803 *** Changes are now highlighted using the same color scheme as in
1804 modern VCSes. Deletions are displayed in red (new faces
1805 `diff-refine-removed' and `smerge-refined-removed', and new definition
1806 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1807 and `smerge-refined-added', and new definition of `diff-added').
1809 *** The variable `diff-use-changed-face' defines whether to use the
1810 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1811 changes in context diffs.
1813 *** The new command `diff-delete-trailing-whitespace' removes trailing
1814 whitespace introduced by a diff.
1816 ** Ediff now uses the same color scheme as Diff mode.
1820 A new version of python.el, which provides several new features, including:
1821 per-buffer shells, better indentation, Python 3 support, and improved
1822 shell-interaction compatible with iPython (and virtually any other
1825 *** Some user options have been replaced/renamed, including (old -> new):
1826 **** python-indent -> python-indent-offset
1827 **** python-guess-indent -> python-indent-guess-indent-offset
1828 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1829 **** python-use-skeletons -> python-skeleton-autoinsert
1831 *** Some user options have been removed, including:
1833 **** `python-indent-string-contents': Strings are never indented.
1835 **** `python-honour-comment-indentation':
1836 Comments are always considered as indentation markers.
1838 **** `python-continuation-offset': Indentation is automatically
1839 calculated in a pep8 compliant way depending on the context.
1841 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1842 Have no direct mapping as the shell interaction is completely different.
1844 **** `python-python-command', `python-jython-command':
1845 Replaced by `python-shell-interpreter'.
1847 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1848 `python-pdbtrack-minor-mode-string', `python-source-modes':
1851 *** Some commands have been replaced (old -> new):
1852 **** python-insert-class -> python-skeleton-class
1853 **** python-insert-def -> python-skeleton-def
1854 **** python-insert-for -> python-skeleton-for
1855 **** python-insert-if -> python-skeleton-if
1856 **** python-insert-try/except -> python-skeleton-try
1857 **** python-insert-try/finally -> python-skeleton-try
1858 **** python-insert-while -> python-skeleton-while
1859 **** python-find-function -> python-nav-jump-to-defun
1860 **** python-next-statement -> python-nav-forward-sentence
1861 **** python-previous-statement -> python-nav-backward-sentence
1862 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1863 **** python-end-of-defun-function -> python-nav-end-of-defun
1864 **** python-send-buffer -> python-shell-send-buffer
1865 **** python-send-defun -> python-shell-send-defun
1866 **** python-send-region -> python-shell-send-region
1867 **** python-send-region-and-go -> emulate with python-shell-send-region
1868 and python-shell-switch-to-shell
1869 **** python-send-string -> python-shell-send-string
1870 **** python-switch-to-python -> python-shell-switch-to-shell
1871 **** python-describe-symbol -> python-eldoc-at-point
1875 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1877 *** The D-Bus object manager interface is implemented.
1879 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1880 if their value does not fit into Emacs's integer range.
1882 *** The function `dbus-call-method' is now non-blocking.
1883 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1885 *** Signals can also be sent as unicast messages.
1887 *** The argument list of `dbus-register-signal' has been extended,
1888 according to the new match rule types of D-Bus.
1890 *** `dbus-init-bus' supports private connections.
1892 *** There is a new function `dbus-setenv'.
1894 ** `desktop-path' no longer includes the "." directory.
1895 Desktop files are now located in ~/.emacs.d by default.
1899 *** `dired-do-async-shell-command' executes each file sequentially
1900 if the command ends in `;' (when operating on multiple files).
1901 Otherwise, it executes the command on each file in parallel.
1903 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1904 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1907 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1908 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1909 mark/unmark/flag all files in the active region.
1911 *** The minibuffer default for `=' (`dired-diff') has changed.
1912 It is now the backup file for the file at point, if one exists.
1913 In Transient Mark mode the default is the file at the active mark.
1915 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1916 The global binding for `M-=', `count-words-region' is in effect.
1920 *** New module "notifications", which can send a notification when you
1921 receive a private message or your nickname is mentioned.
1923 *** ERC will look up server/channel names via auth-source and use any
1926 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1927 only applies to messages sent by lurkers.
1929 ** reStructuredText mode
1931 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1932 fontification, comment handling, and customization have all been revised
1935 *** Support for `imenu' and `which-function-mode'.
1937 *** The reStructuredText syntax is more closely covered.
1938 Sphinx support has been improved.
1940 *** `rst-insert-list' inserts new list or continues existing lists.
1942 *** A negative prefix argument always works for `rst-adjust'.
1944 *** The window configuration is reset after displaying a TOC.
1946 *** The constant `rst-version' describes the rst.el package version.
1950 *** Support for percent literals and recognition of regular expressions
1951 in method calls without parentheses with more methods, including Cucumber
1954 *** Improved syntax highlighting and indentation.
1956 *** New command `ruby-toggle-block', bound to `C-c {'.
1958 *** Some non-standard keybindings/commands have been removed:
1960 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1962 **** `ruby-mark-defun'; use `mark-defun'.
1964 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1965 appropriate settings for the variables `beginning-of-defun-function'
1966 and `end-of-defun-function'.
1968 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1969 `reindent-then-newline-and-indent' and `newline' have been removed.
1971 ** Shell Script mode
1973 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1975 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1977 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1981 *** The free software compiler GHDL is supported (and now the default).
1983 *** Support for the VHDL-AMS packages has been added/updated.
1985 *** Updated to the 2002 revision of the VHDL standard.
1987 *** Accepts \r and \f as whitespace.
1991 *** The faces used by Apropos are now directly customizable.
1992 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1993 see the `apropos' Custom group for details.
1995 *** The old options whose values specified faces to use have been removed
1996 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1997 `apropos-match-face' and `apropos-property-face'.).
2001 *** This package has been rewritten to use Tabulated List mode.
2003 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2004 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2008 *** Algebraic simplification mode is now the default.
2009 To restrict to the limited simplifications given by the former
2010 default simplification mode, use `m I'.
2014 *** You can customize the header text that appears above each calendar month.
2015 See the variable `calendar-month-header'.
2017 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2019 *** The calendars produced by cal-html include holidays.
2020 Customize `cal-html-holidays' to change this.
2024 *** The major modes from the parser generators "Bovine" and "Wisent"
2025 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2026 are in `auto-mode-alist', and the corresponding manuals are included.
2030 **** Menu support for the "Configuration" feature. This allows users to
2031 choose the active configuration (such as debug or install) from the menu.
2033 **** New command `ede-set' to interactively set project-local variables.
2035 **** Support for compiling, debugging, and running in "generic" projects.
2037 **** Autoconf editing support for M4 macros with complex arguments.
2039 **** Compilation support for the "linux" project type.
2041 **** "simple" projects have been removed; use "generic" projects instead.
2045 **** Support for parsing #include statements inside a namespace in C/C++.
2047 **** Improved support for 'extern "C"' declarations in C/C++.
2049 **** The ability to ignore more common special C/C++ preprocessor symbols,
2050 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2051 If available, include cdefs.h as an additional source of preprocessor symbols.
2053 **** Improved C/C++ function pointer parsing.
2055 **** In Python, support for converting imports to include file names.
2057 **** Ability to dynamically determine the Python load path.
2059 **** Support for the Python 'WITH' and 'AT' keywords.
2061 **** Improved tooltip completion.
2065 **** The SRecode manual is now included.
2067 **** Tag generation supports constructor/destructor settings and system
2068 include differentiation.
2070 **** Addition of 'Framework' support: Frameworks are specified when a
2071 particular kind of library (such as Android) is needed in a common language
2074 **** Support for nested templates and let variables override based on priority.
2076 **** Support for merging tables from multiple related modes, such as
2077 default -> c++ -> arduino.
2079 ** Compile has a new option `compilation-always-kill'.
2083 *** `custom-reset-button-menu' now defaults to t.
2085 *** Non-option variables are never matched in `customize-apropos' and
2086 `customize-apropos-options' (i.e., the prefix argument does nothing for
2087 these commands now).
2091 *** The variables `term-default-fg-color' and `term-default-bg-color'
2092 are now deprecated in favor of the customizable face `term'.
2094 *** You can customize how to display ANSI terminal colors and styles
2095 by customizing the corresponding `term-color-<COLOR>',
2096 `term-color-underline' and `term-color-bold' faces.
2100 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2102 *** Remote processes are now also supported on remote MS-Windows hosts.
2106 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2107 Previously, this slot stored semicolon-separated attribute-value pairs
2108 appended to some imap URLs, but this is not compatible with RFC 3986.
2109 So now the `filename' slot stores the entire path and query components,
2110 and the `attributes' slot is always nil.
2112 *** New function `url-encode-url' for encoding a URI string.
2113 The `url-retrieve' function now uses this to encode its URL argument,
2114 in case that is not properly encoded.
2116 ** notifications.el supports now version 1.2 of the Notifications API.
2117 The function `notifications-get-capabilities' returns the supported
2120 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2121 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2122 `flymake-warning-bitmap'.
2124 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2125 specifying URL types that should be converted to remote file names at
2126 the FFAP prompt. The default is now '("ftp").
2128 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2129 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2131 ** New option `mouse-avoidance-banish-position' specifies where the
2132 `banish' mouse avoidance setting moves the mouse.
2134 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2135 closing brackets to be aligned with the line of the opening bracket.
2137 ** In Proced mode, new command `proced-renice' renices marked processes.
2139 ** New option `async-shell-command-buffer' specifies the buffer to use
2140 for a new asynchronous `shell-command' when the default output buffer
2141 `*Async Shell Command*' is already in use.
2143 ** SQL mode has a new option `sql-db2-escape-newlines'.
2144 If non-nil, newlines sent to the command interpreter will be escaped
2145 by a backslash. The default does not escape the newlines and assumes
2146 that the sql statement will be terminated by a semicolon.
2148 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2149 (and modes that derive from it), sorts the column at point, or the Nth
2150 column if a numeric prefix argument is given.
2152 ** `which-func-modes' now defaults to t, so Which Function mode, when
2153 enabled, applies to all applicable major modes.
2155 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2158 ** Follow mode no longer works by using advice.
2159 The option `follow-intercept-processes' has been removed.
2161 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2163 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2164 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2165 *** semantic-change-hooks -> semantic-change-functions
2166 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2167 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2168 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2169 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2170 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2171 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2172 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2173 *** rcirc-activity-hooks -> rcirc-activity-functions
2174 *** rcirc-print-hooks -> rcirc-print-functions
2175 *** dbus-event-error-hooks -> dbus-event-error-functions
2176 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2177 *** checkdoc-style-hooks -> checkdoc-style-functions
2178 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2179 *** archive-extract-hooks -> archive-extract-hook
2180 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2181 *** hfy-post-html-hooks -> hfy-post-html-hook
2182 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2183 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2184 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2185 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2187 ** Obsolete packages
2190 In most cases, assoc+member+push+delq work just as well.
2191 And in any case it's just a terrible package: ugly semantics, terrible
2192 inefficiency, and not namespace-clean.
2201 * Incompatible Lisp Changes in Emacs 24.3
2203 ** Docstrings starting with `*' no longer indicate user options.
2204 Only variables defined using `defcustom' are considered user options.
2205 The function `user-variable-p' is now an obsolete alias for
2206 `custom-variable-p'.
2208 ** The return values of `defalias', `defun' and `defmacro' have changed,
2209 and are now undefined. For backwards compatibility, `defun' and
2210 `defmacro' currently return the name of the newly defined
2211 function/macro, but this should not be relied upon.
2213 ** `random' by default now returns a different random sequence in
2214 every Emacs run. Use `(random S)', where S is a string, to set the
2215 random seed to a value based on S, in order to get a repeatable
2216 sequence in later calls.
2218 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2219 that substring is inserted literally even if the LITERAL arg is
2220 non-nil, instead of causing an error to be signaled.
2222 ** `select-window' now always makes the window's buffer current.
2223 It does so even if the window was selected before.
2225 ** The function `x-select-font' can return a font spec, instead of a
2226 font name as a string. Whether it returns a font spec or a font name
2227 depends on the graphical library.
2229 ** `face-spec-set' no longer sets frame-specific attributes when the
2230 third argument is a frame (that usage was obsolete since Emacs 22.2).
2232 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2234 ** The CL package's `get-setf-method' function no longer exists.
2235 Generalized variables are now part of core Emacs Lisp, and implemented
2236 differently to the way cl.el used to do it. It is not possible to
2237 define a compatible replacement for `get-setf-method'. See the file
2238 gv.el for internal details of the new implementation.
2240 ** The arguments of `dbus-register-signal' are no longer just strings,
2241 but keywords or keyword-string pairs. The old argument list will
2242 still be supported for Emacs 24.x.
2244 ** Miscellaneous name changes
2245 Some Lisp symbols have been renamed to correct their spelling,
2246 or to be more consistent with standard Emacs terminology.
2248 *** Renamed functions
2249 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2250 **** inactivate-input-method -> deactivate-input-method
2251 **** quail-inactivate -> quail-deactivate
2252 **** robin-inactivate -> robin-deactivate
2253 **** viper-inactivate-input-method -> viper-deactivate-input-method
2254 **** viper-inactivate-input-method-action ->
2255 viper-deactivate-input-method-action
2256 **** ucs-input-inactivate -> ucs-input-deactivate
2259 The old hooks are still supported for backward compatibility, but they
2260 are deprecated and will be removed eventually.
2261 **** input-method-inactivate-hook -> input-method-deactivate-hook
2262 **** robin-inactivate-hook -> robin-deactivate-hook
2263 **** quail-inactivate-hook -> quail-deactivate-hook
2265 *** Renamed variables
2266 **** follow-deactive-menu -> follow-inactive-menu
2267 **** inactivate-current-input-method-function ->
2268 deactivate-current-input-method-function
2270 ** Some obsolete functions, variables, and faces have been removed:
2271 *** `last-input-char', `last-command-char', `unread-command-char'
2272 *** `facemenu-unlisted-faces'
2273 *** `rmail-decode-mime-charset'
2274 *** `iswitchb-read-buffer'
2275 *** `sc-version', `sc-submit-bug-report'
2276 *** `set-char-table-default'
2277 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2278 *** `compile-internal'
2280 *** `mode-line-inverse-video'
2281 *** `follow-mode-off-hook'
2282 *** `cvs-commit-buffer-require-final-newline'
2283 (use `log-edit-require-final-newline' instead)
2284 *** `cvs-changelog-full-paragraphs'
2285 (use `log-edit-changelog-full-paragraphs' instead)
2286 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2287 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2288 *** `vc-master-templates' (use `vc-handled-backends' instead)
2289 *** `vc-checkout-carefully'
2292 * Lisp Changes in Emacs 24.3
2294 ** CL-style generalized variables are now in core Elisp.
2295 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2296 You can define your own generalized variables using `gv-define-simple-setter',
2297 `gv-define-setter', etc.
2299 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2300 This can significantly speed up execution of non-byte-compiled code,
2301 but can also bump into previously unnoticed cyclic dependencies.
2302 These are generally harmless: they will simply cause the macro calls
2303 to be left for later expansion (as before), but will result in a
2304 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2305 You may wish to restructure your code so this does not happen.
2307 ** New sampling-based Elisp profiler.
2308 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2309 When finished, use M-x profiler-stop. The sampling rate can be based on
2310 CPU time or memory allocations.
2312 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2313 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2315 ** New macros `setq-local' and `defvar-local'.
2317 ** Face underlining can now use a wave.
2319 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2320 of `read-regexp' accepts a string ending with a colon and space, and its
2321 second argument DEFAULTS can be a list of strings accessible via `M-n'
2322 in the minibuffer ahead of other hard-coded useful regexp-related values.
2323 More commands use `read-regexp' now to read their regexp arguments.
2327 *** New function `completion-table-with-quoting' to handle completion
2328 in the presence of quoting, such as file completion in shell buffers.
2330 *** New function `completion-table-subvert' to use an existing completion
2331 table, but with a different prefix.
2335 *** New error type and new function `user-error'.
2336 These do not trigger the debugger.
2338 *** New option `debugger-bury-or-kill', saying what to do with the
2339 debugger buffer when exiting debug.
2341 *** Set `debug-on-message' to enter the debugger when a certain
2342 message is displayed in the echo area. This can be useful when trying
2343 to work out which code is doing something.
2345 *** New var `inhibit-debugger', automatically set to prevent accidental
2346 recursive invocations.
2350 *** New command `fit-frame-to-buffer' adjusts the frame height to
2353 *** The command `fit-window-to-buffer' can adjust the frame height
2354 if the new option `fit-frame-to-buffer' is non-nil.
2356 *** New macro `with-temp-buffer-window', similar to
2357 `with-output-to-temp-buffer'.
2359 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2362 *** New option `switch-to-buffer-preserve-window-point' to restore a
2363 window's point when switching buffers.
2365 *** New display action alist entries `window-height' and `window-width'
2366 specify the size of new windows created by `display-buffer'.
2368 *** New display action alist entry `pop-up-frame-parameters', if
2369 non-nil, specifies frame parameters to give any newly-created frame.
2371 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2372 tells display action functions to avoid changing which frame is
2375 *** New display action alist entry `previous-window', if non-nil,
2376 specifies window to reuse in `display-buffer-in-previous-window'.
2378 *** New display action functions `display-buffer-below-selected',
2379 and `display-buffer-in-previous-window'.
2381 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2382 now accept a third argument to avoid choosing the selected window.
2384 *** Additional values recognized for option `window-combination-limit'.
2386 *** The following variables are obsolete, as they can be replaced by
2387 appropriate entries in the `display-buffer-alist' function introduced
2389 **** `dired-shrink-to-fit'
2390 **** `display-buffer-reuse-frames'
2391 **** `display-buffer-function'
2392 **** `special-display-buffer-names'
2393 **** `special-display-frame-alist'
2394 **** `special-display-function'
2395 **** `special-display-regexps'
2399 *** `current-time-string' no longer requires that its argument's year
2400 must be in the range 1000..9999. It now works with any year supported
2401 by the underlying C implementation.
2403 *** `current-time' now returns extended-format time stamps
2404 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2405 PSEC is typically a multiple of 1000 on current machines. Other
2406 functions that use this format, such as `file-attributes' and
2407 `format-time-string', have been changed accordingly. Old-format time
2408 stamps are still accepted.
2410 *** The format of timers in `timer-list' and `timer-idle-list' is now
2411 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2412 The PSECS slot is new, and uses picosecond resolution. It can be
2413 accessed via the new `timer--psecs' accessor.
2415 *** Last-modified time stamps in undo lists now are of the form
2416 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2420 *** Improved security when handling persistent objects:
2422 **** `eieio-persistent-read' now features optional arguments for specifying
2423 the class to load, as well as a flag stating whether subclasses are allowed;
2424 if provided, other classes will be rejected by the reader. For
2425 compatibility with existing code, if the class is omitted only a
2428 **** New specialized reader for pulling in classes and signaling errors
2429 without evaluation of suspicious code.
2431 **** All slots that contain objects must have a :type. Slots with lists
2432 of objects must use a new type predicate for a list of an object type.
2434 *** Support for `find-function' and similar utilities, through the addition
2435 of filename support to generated symbols.
2437 ** Floating point functions now always return special values like NaN,
2438 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2439 Previously, they returned NaNs on some platforms but signaled errors
2440 on others. The affected functions are acos, asin, tan, exp, expt,
2441 log, log10, sqrt, and mod.
2443 ** New fringe bitmap `exclamation-mark'.
2445 ** Miscellaneous changes to special forms and macros
2447 *** `defun' and `defmacro' are now macros rather than special forms.
2449 *** `kbd' is now a function rather than a macro.
2451 ** Miscellaneous new functions
2453 *** `set-temporary-overlay-map' sets up a temporary keymap that
2454 takes precedence over most other maps for a short while (normally one key).
2456 *** `autoloadp' tests if its argument is an autoloaded object.
2458 *** `autoload-do-load' performs the autoloading operation.
2460 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2462 *** `file-name-base' returns a file name sans directory and extension.
2464 *** `function-get' fetches a function property, following aliases.
2466 *** `posnp' tests if an object is a `posn'.
2468 *** `system-users' returns the user names on the system.
2470 *** `system-groups' returns the group names on the system.
2472 *** `tty-top-frame' returns the topmost frame of a text terminal.
2474 ** The following functions and variables are obsolete:
2475 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2476 *** `buffer-has-markers-at'
2477 *** `macro-declaration-function' (use `macro-declarations-alist')
2478 *** `window-system-version' (provides no useful information)
2479 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2480 *** `query-replace-interactive'
2481 *** `font-list-limit' (has had no effect since Emacs < 23)
2484 * Changes in Emacs 24.3 on Non-Free Operating Systems
2486 ** Cygwin builds can use the native MS Windows user interface.
2487 Pass `--with-w32' to configure. The default remains the X11 interface.
2489 ** Two new functions are available in Cygwin builds:
2490 `cygwin-convert-file-name-from-windows' and
2491 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2492 code to access the Cygwin file-name mapping machinery to convert
2493 between Cygwin and Windows-native file and directory names.
2495 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2496 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2497 `mouse-autoselect-window'.
2499 ** On MS Windows Vista and later Emacs now supports symbolic links.
2501 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2502 support for libxml2, even if its presence is detected.
2504 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2506 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2507 directories to the search path. You must add them yourself if you want them.
2510 * Changes in Emacs 24.2
2512 ** This is mainly a bug-fix release.
2515 * Installation Changes in Emacs 24.1
2517 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2518 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2519 also depend on Gtk+. You can disable them with --without-rsvg and
2522 ** Emacs can be compiled with GnuTLS support.
2523 This happens by default if a suitably recent version of the library is
2524 found at build time. To prevent this, use the configure option
2525 `--without-gnutls'. See below for GnuTLS features.
2527 ** Emacs can be compiled with SELinux support.
2528 This happens by default if a suitably recent version of the library is
2529 found at build time. To prevent this, use the configure option
2530 `--without-selinux'. See below for SELinux features.
2532 ** Emacs can be compiled with ImageMagick support.
2533 This happens by default if a suitably recent version of the library is
2534 found at build time. To prevent this, use the configure option
2535 `--without-imagemagick'. See below for ImageMagick features.
2536 This feature is not available for the Nextstep or MS ports.
2538 ** Emacs can be compiled with libxml2 support.
2539 This happens by default if a suitably recent version of the library is
2540 found at build time. To prevent this, use the configure option
2541 `--without-xml2'. See below for libxml2 features.
2543 ** By default, the installed Info and man pages are compressed.
2544 You can disable this by configuring --without-compress-info.
2546 ** New configure option --with-wide-int.
2547 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2548 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2551 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2552 These provide no new functionality, they just remove the need to edit
2553 lib-src/Makefile by hand in order to use the associated features.
2555 ** New configure option --enable-use-lisp-union-type.
2556 This is only useful for Emacs developers to debug certain types of bugs.
2557 This is not a new feature; only the configure flag is new.
2559 ** The standalone programs digest-doc and sorted-doc are removed.
2560 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2562 ** The standalone program `fakemail' is removed.
2563 If you need it, feedmail.el provides a superset of the functionality.
2566 * Startup Changes in Emacs 24.1
2568 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2569 command line arguments, and the EMACS_UNIBYTE environment variable, no
2570 longer have any effect. (They were declared obsolete in Emacs 23.)
2572 ** New command line option `--no-site-lisp' removes site-lisp directories
2573 from load-path. -Q now implies this. This option does not affect the
2574 EMACSLOADPATH environment variable (and hence has no effect for
2578 * Changes in Emacs 24.1
2582 *** Many packages now use the `completion-at-point' command,
2583 rather than implementing separate completion commands.
2585 *** `completion-at-point' now handles tags and semantic completion.
2587 *** Completion in a non-minibuffer now tries to detect the end of completion
2588 and pops down the *Completions* buffer accordingly.
2590 *** New option `completion-cycle-threshold' allows completion cycling.
2592 *** New option `completion-category-overrides' for overriding the
2593 default completion style in certain circumstances.
2595 *** New completion style `substring'.
2597 *** Completion of buffer names uses `substring' completion by default.
2599 *** The option `widget-complete-field' has been removed.
2603 *** The first time you try sending mail, Emacs asks for a mail method.
2604 This is implemented by a new default for `send-mail-function', which
2605 is `sendmail-query-once'. This offers to use the smtpmail package, or
2606 to use the old defaults relying on external mail facilities
2607 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2608 `mailclient-send-it' on Windows).
2610 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2611 transfers the report to your desktop's preferred mail client, if there
2612 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2615 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2616 and Mail mode changes
2618 ** Emacs server and client changes
2620 *** New option `server-port' specifies the port for TCP Emacs servers.
2622 *** New emacsclient argument -q/--quiet suppresses some status messages.
2624 *** New emacsclient argument --frame-parameters specifies the frame
2625 parameters of any newly-created graphical frame.
2627 *** If emacsclient shuts down due to Emacs signaling an error,
2628 its exit status is 1.
2630 *** New emacsclient argument --parent-id ID.
2631 This opens a client frame in parent X window ID, via XEmbed, similar
2632 to the --parent-id argument to Emacs.
2634 ** Internationalization changes
2636 *** Emacs now supports display and editing of bidirectional text.
2637 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2638 displayed in the correct visual order as expected by users of those
2639 scripts. The display reordering is a "full bidirectionality" class
2640 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2641 with no RTL text should look exactly the same as before.
2643 **** New buffer-local variable `bidi-display-reordering'.
2644 To disable display reordering in a buffer, change this to nil.
2646 **** New buffer-local variable `bidi-paragraph-direction'.
2647 If nil (the default), Emacs determines the base direction of each
2648 paragraph from its text, as specified by the UBA. Setting the value
2649 to `right-to-left' or `left-to-right' forces a base direction on each
2652 Paragraphs with right-to-left base direction are displayed starting at
2653 the right window edge.
2655 *** Enhanced support for characters with no glyphs in available fonts,
2656 or, on text terminals, characters that cannot be encoded by the
2657 terminal coding system. The new option `glyphless-char-display-control'
2658 specifies how to display them: as a hexadecimal code in a box, a thin
2659 1-pixel space, an empty box, etc.
2661 *** New input methods for Farsi and Bulgarian
2662 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2664 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2665 (U+2010 and U+2011).
2667 *** New Hebrew translation of the Emacs Tutorial.
2668 Type `C-u C-h t' to choose it in case your language setup doesn't
2669 automatically select it.
2671 ** An Emacs Lisp package manager is now included.
2672 This is a convenient way to download and install additional packages,
2673 from a package repository at http://elpa.gnu.org.
2675 *** M-x list-packages shows a list of packages, which can be
2676 selected for installation.
2678 *** New command `describe-package', bound to `C-h P'.
2680 *** By default, all installed packages are loaded automatically when
2681 Emacs starts up. To disable this, set `package-enable-at-startup' to
2682 nil. To specify the packages to load, customize `package-load-list'.
2684 ** Custom theme changes
2686 *** New command `M-x customize-themes', which provides a convenient
2687 interface for enabling and disabling Custom themes.
2689 *** New option `custom-theme-load-path' is the load path for themes.
2690 Emacs no longer looks for Custom themes in `load-path'. The default
2691 value of `custom-theme-load-path' says to look for themes in
2692 `custom-theme-directory', followed by a subdirectory of
2693 `data-directory' named "themes/", which contains a small selection of
2694 built-in Custom themes.
2696 *** New option `custom-safe-themes' records known-safe theme files.
2697 If a theme is not in this list, Emacs queries before loading it, and
2698 offers to save the theme to `custom-safe-themes' automatically. By
2699 default, all themes included in Emacs are treated as safe.
2701 ** Improved GTK integration
2703 *** GTK scroll-bars are now placed on the right by default.
2704 The function `set-scroll-bar-mode' can change this.
2706 *** GTK tool bars can have just text, just images or images and text.
2707 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2708 the default is taken from desktop settings.
2710 *** GTK tool bars can be placed on any edge of the frame.
2711 The frame-parameter tool-bar-position controls this. It takes the
2712 values top, left, right or bottom. The Options => Show/Hide menu has
2715 *** The default colors for selected text (the `region' face) are taken
2716 from the GTK theme when Emacs is built with GTK.
2718 *** Emacs uses GTK tooltips by default if built with GTK.
2719 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2721 ** Graphical interface changes
2723 *** On graphical displays, the mode-line no longer ends in dashes.
2724 Also, the first dash (which does not indicate anything) is just
2725 displayed as a space.
2727 *** `menu-bar-select-buffer-function' lets you choose another operation
2728 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2730 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2731 built with Xft. These fonts can be set via X resources, for example:
2732 Emacs.pane.menubar.font: Courier-12
2736 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2737 or if it receives a SIGINT signal in batch mode.
2739 *** `kill-emacs-hook' is now also run in batch mode.
2740 Third-party code which adds to `kill-emacs-hook' should check if they
2741 do the right thing in batch mode.
2743 ** Scrolling changes
2745 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2746 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2747 of buffer at first key-press (instead they move to top/bottom of buffer)
2748 when `scroll-error-top-bottom' is non-nil.
2750 *** New option `scroll-error-top-bottom' (see above).
2752 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2753 scroll a line instead of full screen.
2755 *** New property `scroll-command' should be set on a command's symbol to
2756 define it as a scroll command affected by `scroll-preserve-screen-position'.
2758 *** If you customize `scroll-conservatively' to a value greater than 100,
2759 Emacs will never recenter point in the window when it scrolls due to
2760 cursor motion commands or commands that move point (e.f., `M-g M-g').
2761 Previously, you needed to use `most-positive-fixnum' as the value of
2762 `scroll-conservatively' to achieve the same effect.
2764 *** "Aggressive" scrolling now honors the scroll margins.
2765 If you customize `scroll-up-aggressively' or
2766 `scroll-down-aggressively' and move point off the window, Emacs now
2767 scrolls the window so as to avoid positioning point inside the scroll
2770 ** Basic SELinux support has been added.
2771 This requires Emacs to be linked with libselinux at build time.
2773 *** Emacs preserves the SELinux file context when backing up.
2774 Also, the function `copy-file' has an extra optional argument for
2775 preserving SELinux context, and the return value of `backup-buffer'
2776 now includes the SELinux context.
2778 *** New functions `file-selinux-context' and `set-file-selinux-context'
2779 get and set the SELinux context of a file.
2783 *** `delete-by-moving-to-trash' now only affects commands that specify
2784 trashing. This avoids inadvertently trashing temporary files.
2786 *** Calling `delete-file' or `delete-directory' with a prefix argument
2787 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2789 ** File- and directory-local variable changes
2791 *** You can stop directory local vars from applying to subdirectories.
2792 Add an element (subdirs . nil) to the alist portion of any variables
2793 settings to indicate that the section should not apply to
2796 *** Directory local variables can apply to some file-less buffers.
2797 Affected modes include dired, vc-dir, and log-edit. For example,
2798 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2799 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2800 `hack-dir-local-variables-non-file-buffer' to support this.
2802 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2803 Instead, use "eval: (minor-mode 1)".
2805 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2806 to `inhibit-local-variables-regexps'. As the name suggests, it now
2807 applies to ALL file local variables, not just -*- lines. The
2808 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2813 *** The `quit-window' command now restores the last buffer displayed
2814 in the quitted window.
2816 *** Resizing an Emacs frame now preserves proportional window sizes,
2817 modulo restrictions like window minimum sizes and fixed-size windows.
2819 *** The behavior of `display-buffer' is now customizable in detail.
2821 **** New option `display-buffer-base-action' specifies a list of
2822 user-determined display "actions" (functions and optional arguments
2823 for choosing the displaying window).
2825 This takes precedence over the default display action, which is
2826 specified by `display-buffer-fallback-action'.
2828 **** New option `display-buffer-alist' maps buffer name regexps to
2829 display actions, taking precedence over `display-buffer-base-action'.
2831 *** New option `window-combination-limit'.
2832 The new option `window-combination-limit' allows to return the space
2833 obtained for resizing or creating a window more reliably to the window
2834 from which such space was obtained.
2836 *** New option `window-combination-resize'.
2837 The new option `window-combination-resize' allows to split a window that
2838 otherwise cannot be split because it's too small by stealing space from
2839 other windows in the same combination. Subsequent resizing or deletion
2840 of the window will resize all windows in the same combination as well.
2842 *** New option `frame-auto-hide-function' lets you choose between
2843 iconifying or deleting a frame when burying a buffer in a dedicated
2844 frame, or quitting a window showing a buffer in a frame of its own.
2846 *** New commands `maximize-window' and `minimize-window'.
2847 These maximize and minimize the size of a window within its frame.
2849 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2850 These functions allow to navigate through the live buffers that have
2851 been shown in a specific window.
2853 ** Minibuffer changes
2855 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2856 This is handy for minibuffer-only frames, and is also used for the feature
2857 where mouse-1 pops up *Messages*"', which can now easily be changed.
2859 *** Minibuffers set `truncate-lines' to nil.
2860 If you want to change the value to something else, you could use
2861 for example `minibuffer-setup-hook'.
2863 ** `auto-mode-case-fold' is now enabled by default.
2865 ** `backup-by-copying-when-mismatch' now defaults to t.
2867 ** New basic faces `error', `warning', `success'.
2868 These are used to highlight text indicating failure, caution or
2869 successful operation.
2871 ** New option `list-colors-sort' defines the color sort order
2872 for `list-colors-display'.
2874 ** The variable `focus-follows-mouse' now always defaults to nil.
2877 * Editing Changes in Emacs 24.1
2881 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2882 `isearch-yank-line'.
2884 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2885 `isearch-yank-kill'.
2887 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2889 ** New commands `count-words-region' and `count-words'.
2891 *** M-= is bound to `count-words-region', not `count-lines-region'.
2892 The `count-words-region' command, when called interactively, reports
2893 the number of lines, words, and characters in the region. It is a
2894 superset of the old `count-lines-region', which is now an obsolete
2897 ** The command `just-one-space' (M-SPC), if given a negative argument,
2898 also deletes newlines around point.
2902 *** New option `delete-active-region'.
2903 If non-nil, [delete] and DEL delete the region if it is active and no
2904 prefix argument is given. If set to `kill', those commands kill
2907 *** New command `delete-forward-char', bound to [delete].
2908 This is meant for interactive use, and obeys `delete-active-region'.
2909 The command `delete-char' does not obey `delete-active-region'.
2911 *** `delete-backward-char' is now a Lisp function.
2912 Apart from obeying `delete-active-region', its behavior is unchanged.
2913 However, the byte compiler now warns if it is called from Lisp; Lisp
2914 callers should use delete-char with a negative argument instead.
2916 *** The option `mouse-region-delete-keys' has been deleted.
2918 ** Selection changes.
2920 The default handling of clipboard and primary selections has been
2921 changed to conform with modern X applications. In short, most
2922 commands for killing and yanking text now use the clipboard, while
2923 mouse commands use the primary selection.
2925 In the following, we provide a list of these changes, followed by a
2926 list of steps to get the old behavior back if you prefer that.
2928 *** `select-active-regions' now defaults to t.
2929 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2930 the kill ring. The selected text is put in the primary selection, if
2931 the system possesses a separate primary selection facility (e.g. X).
2933 **** `select-active-regions' also accepts a new value, `only'.
2934 This means to only set the primary selection for temporarily active
2935 regions (usually made by mouse-dragging or shift-selection);
2936 "ordinary" active regions, such as those made with C-SPC followed by
2937 point motion, do not alter the primary selection.
2939 **** `mouse-drag-copy-region' now defaults to nil.
2941 *** mouse-2 is now bound to `mouse-yank-primary'.
2942 This pastes from the primary selection, ignoring the kill-ring.
2943 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2945 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2947 *** `x-select-enable-primary' now defaults to nil.
2948 Thus, commands that kill text or copy it to the kill-ring (such as
2949 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2951 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2952 exactly equivalent to M-w, C-w, and C-y respectively.
2954 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2955 non-nil by default, as Windows does not support the primary selection
2956 between applications.
2958 *** To return to the previous behavior, do the following:
2960 **** Change `select-active-regions' to nil.
2961 **** Change `mouse-drag-copy-region' to t.
2962 **** Change `x-select-enable-primary' to t (on X only).
2963 **** Change `x-select-enable-clipboard' to nil.
2964 **** Bind `mouse-yank-at-click' to mouse-2.
2966 *** Support for X cut buffers has been removed.
2968 *** X clipboard managers are now supported.
2969 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2971 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2972 in the current rectangle. With a prefix argument, this prompts for a
2973 number to count from and for a format string.
2975 ** `redisplay-dont-pause' now defaults to t.
2976 This makes Emacs feel more responsive to editing commands that arrive
2977 at high rate, e.g. if you lean on some key, because stopping redisplay
2978 in the middle (when this variable is nil) forces more expensive
2979 updates later on, and Emacs appears to be unable to keep up.
2981 ** The behavior of <TAB> for active regions in Text mode has changed.
2982 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2983 when the region is active causes Emacs to indent all the lines in the
2984 region, aligning them with the line previous to the first line in the
2985 region (or with the left margin if there is no previous line).
2987 ** When `occur' is called with a prefix argument, matching strings are
2988 collected into the `*Occur*' buffer without line numbers. If there
2989 are parenthesized subexpressions in the specified regexp, `occur'
2990 reads replacement text that may contain \\& and \\N whose convention
2991 follows `replace-match'.
2994 * Changes in Specialized Modes and Packages in Emacs 24.1
2996 ** Archive Mode has basic support for browsing and updating 7z archives.
3000 *** BibTeX mode now supports biblatex.
3001 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3002 `bibtex-entry-field-alist' is now an obsolete alias for
3003 `bibtex-BibTeX-entry-alist'.
3005 *** New command `bibtex-search-entries', bound to C-c C-a.
3007 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3009 *** New variable `bibtex-search-entry-globally'.
3013 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3015 *** The default browser used by the package is now the "xdg-open" program,
3016 on platforms that support it. This calls your desktop's preferred browser.
3020 *** Support for musical notes.
3022 *** Support for logarithmic units.
3024 *** No longer uses the tex prefix for TeX specific unit names when
3025 using TeX or LaTeX mode.
3027 *** New option to highlight selections using faces.
3029 *** `calc-histogram' has the option of using a vector to determine the bins.
3031 *** New "O" option prefix.
3033 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3035 ** Calendar, Diary, and Appt
3037 *** Diary entries can contain non-printing "comments".
3038 See the variable `diary-comment-start'.
3040 *** Appointments can specify their individual warning times.
3041 See the variable `appt-warning-time-regexp'.
3043 *** The function specified by `appt-disp-window-function' may be passed
3044 lists of arguments if multiple appointments are due at similar times.
3045 If you are using a custom function for this, you should update it.
3047 *** New function `diary-hebrew-birthday'.
3049 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3050 may no longer be nil, but must all be strings.
3052 *** The obsolete (since Emacs 22.1) method of enabling the appt
3053 package by adding `appt-make-list' to `diary-hook' has been removed.
3054 Use `appt-activate' instead.
3056 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3057 appt-issue-message (use the function appt-activate)
3058 appt-visible/appt-msg-window (use the variable appt-display-format)
3060 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3061 view-diary-entries, list-diary-entries, show-all-diary-entries
3065 *** New feature to "guess" the style in an existing buffer.
3066 The main entry point is M-x c-guess.
3068 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3070 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3071 Thus C-M-a will, by default, go to the beginning of the immediate function,
3074 *** "Macros with semicolons" can be registered for correct indentation.
3075 Where such a macro ends a line (no semicolon) the next statement is no longer
3076 parsed as a statement continuation.
3078 ** Comint and modes derived from it use the standard completion code.
3082 *** Compilation mode can be used without Font Lock mode.
3083 `compilation-parse-errors-function' is now obsolete.
3085 *** New variable `compilation-filter-start', which is bound while
3086 `compilation-filter-hook' runs. It records the start position of the
3087 text inserted by `compilation-filter'.
3089 *** `compilation-error-screen-columns' and `compilation-first-column'
3090 are obeyed in the editing buffer. So programming language modes can
3091 set them, whereas previously only the value in the *Compilation*
3096 *** Customize buffers now contain a search field.
3097 The search is performed using `customize-apropos'.
3098 To turn off the search field, set `custom-search-field' to nil.
3100 *** Options in customize group buffers start out hidden if not customized.
3101 Use the arrow to the left of the option name to toggle visibility.
3103 *** custom-buffer-sort-alphabetically now defaults to t.
3105 *** The color widget now has a "Choose" button, which allows you to
3106 choose a color via `list-colors-display'.
3110 *** It is now possible to access buses other than the default system
3113 *** The `dbus-register-method' and `dbus-register-property' functions
3114 optionally do not register names.
3116 *** The new function `dbus-register-service' registers a known service
3117 name on a D-Bus without also registering a property or a method.
3121 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3122 if called with a prefix argument, read a file name from the minibuffer
3123 instead of using the current buffer.
3125 *** The "dired local variables" feature of Dired-x is obsolete.
3126 The standard directory local variables feature replaces it.
3130 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3131 controlling attempts to autojoin a channel.
3133 *** New variable `erc-coding-system-precedence': If we use `undecided'
3134 as the server coding system, this variable will then be consulted.
3135 The default is to decode strings that can be decoded as utf-8 as
3136 utf-8, and do the normal `undecided' decoding for the rest.
3140 *** The default value of `eshell-directory-name' has changed
3141 to be an "eshell" directory in `user-emacs-directory'.
3142 The old "~/.eshell/" directory is still used if it exists, though.
3146 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3147 It now supports multithread non-stop debugging and simultaneous
3148 debugging of several threads.
3152 *** RET (`image-toggle-animation') toggles animation, if applicable.
3153 Animation plays once, unless the option `image-animate-loop' is non-nil.
3157 *** New command M-x info-display-manual displays a named Info manual.
3158 If that manual is already visited in some Info buffer, it displays
3159 that buffer. (This is handy if you have many manuals in many *info*
3160 buffers, and don't remember the name of the buffer visiting the manual
3161 you want to consult.) Otherwise, it loads and displays the manual.
3163 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3164 This is for compatibility with the stand-alone Info reader program,
3165 and also because `Info-edit' is a rarely used command that is disabled
3168 ** Mail mode changes (not Message mode)
3170 *** New command M-x mail-add-attachment for adding MIME attachments
3172 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3173 (Its name is misleading, since it has nothing to do with MIME
3174 attachments.) The old name is now an obsolete alias to the new name.
3176 ** MH-E has been updated to MH-E version 8.3.1.
3177 See MH-E-NEWS for details.
3179 ** Modula-2 mode provides auto-indentation.
3181 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3183 ** nXML mode no longer binds C-RET to `nxml-complete'.
3184 Completion is now performed via `completion-at-point', bound to C-M-i
3185 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3186 default), this performs tag completion.
3188 ** Org mode has been updated to version 7.8.09.
3189 See ORG-NEWS for details.
3191 ** Prolog mode has been completely revamped, with lots of additional
3192 functionality such as more intelligent indentation, electricity,
3193 support for more variants, including Mercury, and a lot more.
3197 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3198 in the Rmail incoming message.
3200 *** The variable `rmail-message-filter' no longer has any effect.
3201 This change was made in Emacs 23.1 but was not advertised at the time.
3202 Try using `rmail-show-message-hook' instead.
3206 *** M-x shell prompts for the shell path name if the default directory
3207 is a remote file name and neither the environment variable $ESHELL nor
3208 the variable `explicit-shell-file-name' is set.
3210 *** TAB is now bound to the standard `completion-at-point' command,
3211 which now implements the pcomplete rules for shell command completion.
3215 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3216 if the mail server supports them. This uses either built-in GnuTLS
3217 support, or the starttls.el library. Customize `smtpmail-stream-type'
3220 *** The variable `smtpmail-auth-credentials' has been removed.
3221 By default, the information is now stored in the file ~/.authinfo.
3222 This was the default value of smtpmail-auth-credentials. If you had
3223 customized smtpmail-auth-credentials to a list of user names and
3224 passwords, those settings are not used. During your first connection
3225 to the smtp server, Emacs will prompt for the user name and password,
3226 and offer to save them to ~/.authinfo. Or you can manually copy the
3227 credentials to ~/.authinfo. For example, if you had
3229 (setq smtpmail-auth-credentials
3230 '(("mail.example.org" 25 "jim" "s!cret")))
3232 then the equivalent line in ~/.authinfo would be
3234 machine mail.example.org port 25 login jim password s!cret
3236 See the auth-source manual for more information, e.g. on encrypting
3237 the credentials file.
3239 *** The variable `smtpmail-starttls-credentials' has been removed.
3240 If you had that set, you need to put
3242 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3244 in your ~/.authinfo file instead.
3246 *** SMTPmail defaults to using the address in the From: header as the
3247 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3248 to the address you wish to use instead.
3252 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3253 and `sql-oracle-scan-on'.
3255 *** New options controlling prompting for login parameters.
3256 Each supported product has a custom variable `sql-*-login-params',
3257 which is a list of the parameters to be prompted for before a
3258 connection is established.
3260 *** The command `sql-product-interactive' now takes a prefix argument,
3261 which causes it to prompt for an SQL product.
3263 *** Product-specific SQL interactive commands now take prefix arguments.
3264 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3265 given a prefix argument, prompt for a name for the SQL interactive
3266 buffer. This reduces the need for calling `sql-rename-buffer'.
3268 *** SQL interactive modes suppress command continuation prompts, and
3269 replace tabs with spaces. The first change impacts multiple line SQL
3270 statements entered with C-j between each line, statements yanked into
3271 the buffer and statements sent with `sql-send-*' functions. The
3272 second prevents the MySQL and Postgres interpreters from listing
3273 object name completions when sent text via `sql-send-*' functions.
3275 *** New command `sql-connect' starts a predefined SQLi session,
3276 using the login parameters from `sql-connection-alist'.
3278 *** New "Save Connection" menu item in SQLi buffers.
3279 This gathers the login params specified for the SQLi session, if it
3280 was not started by a connection, and saves them as a new connection.
3282 *** New commands for listing database objects and details:
3283 sql-list-all and sql-list-table.
3285 *** An API for manipulating SQL product definitions has been added.
3289 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3293 *** New inline access method "ksu" (kerberized su).
3295 *** The following access methods are discontinued: "ssh1_old",
3296 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3298 *** The user option `remote-file-name-inhibit-cache' controls whether
3299 remote file attributes are cached for better performance.
3301 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3302 default value to "".
3304 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3305 for remote machines which support SELinux.
3307 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3308 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3309 the degree of parallelism.
3311 ** VC and related modes
3313 *** Support for pulling on distributed version control systems.
3314 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3315 supported (currently with Bzr, Git, and Mercurial), to update the
3316 current branch and working tree. A prefix argument means to prompt
3317 the user for specifics, e.g. a pull location.
3319 *** `vc-update' is now an alias for `vc-pull'.
3321 *** Support for merging on distributed version control systems.
3322 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3323 is supported (currently with Bzr, Git, and Mercurial), to merge
3324 changes from another branch into the current one. It prompts for
3325 specifics, e.g. a merge source.
3327 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3328 shows a diff while querying the user. It defaults to t.
3330 *** Log entries in some Log View buffers can be toggled to display a
3331 longer description by typing RET (log-view-toggle-entry-display).
3332 This is currently supported for Bzr, Git, and Mercurial (to support
3333 another backend, define a `log-view-expanded-log-entry-function').
3334 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3335 use this to display the full log entry for the revision at point.
3337 *** New command `vc-ediff' allows visual comparison of two revisions
3338 of a file similar to `vc-diff', but using ediff backend.
3340 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3341 this was not advertised at the time.
3343 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3344 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3345 this was not advertised at the time.
3351 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3353 *** partial-completion-mode (complete.el) is obsolete.
3354 You can get a comparable behavior with:
3355 (setq completion-styles '(partial-completion initials))
3356 (setq completion-pcm-complete-word-inserts-delimiters t)
3358 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3360 *** pgg is obsolete (use EasyPG instead).
3362 *** sregex.el is obsolete, since rx.el is a strict superset.
3364 *** s-region.el and pc-select.el are obsolete.
3365 They are superseded by shift-select-mode, enabled by default since 23.1.
3367 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3371 *** The Landmark game is now invoked with `landmark', not `lm'.
3372 Its functions and variables have been similarly renamed.
3374 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3375 (This interfered with cua-mode.)
3377 *** f90.el has some support for Fortran 2008 syntax.
3379 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3381 *** New command `nato-region' converts text to NATO phonetic alphabet.
3384 * New Modes and Packages in Emacs 24.1
3386 ** Occur Edit mode applies edits made in *Occur* buffers to the
3387 original buffers. It is bound to "e" in Occur mode.
3389 ** New global minor mode electric-pair-mode.
3390 When enabled, typing an open parenthesis automatically inserts the
3391 matching closing one.
3393 ** New global minor mode electric-indent-mode.
3394 When enabled, typing certain characters triggers reindentation.
3395 Major modes wishing to use this can set electric-indent-chars or
3396 electric-indent-functions.
3398 ** New global minor mode electric-layout-mode.
3399 When enabled, typing certain characters automatically inserts newlines.
3400 Major modes wishing to use this can set electric-layout-rules.
3402 ** tabulated-list.el provides a generic major mode for tabulated data,
3403 from which other modes can be derived.
3405 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3407 ** secrets.el is an implementation of the Secret Service API, an
3408 interface to password managers like GNOME Keyring or KDE Wallet. The
3409 Secret Service API requires D-Bus for communication. The command
3410 `secrets-show-secrets' offers a buffer with a visualization of the
3413 ** notifications.el provides an implementation of the Desktop
3414 Notifications API. It requires D-Bus for communication.
3416 ** soap-client.el supports access to SOAP web services from Emacs.
3417 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3419 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3421 ** New emacs-lock.el package.
3422 The previous version has been moved to obsolete/old-emacs-lock.el.
3423 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3424 against exiting Emacs and killing the buffer can be set separately.
3425 The mechanism for automatically turning off protection for buffers
3426 with dead inferior processes has been generalized.
3429 * Incompatible Lisp Changes in Emacs 24.1
3431 ** Passing a nil argument to a minor mode function call now ENABLES
3432 the minor mode unconditionally. This is so that you can write e.g.
3434 (add-hook 'text-mode-hook 'foo-mode)
3436 to enable foo-mode in Text mode buffers, removing the need for
3437 `turn-on-foo-mode' style functions. This affects all mode commands
3438 defined by `define-minor-mode'. If called interactively, the mode
3439 command still toggles the minor mode.
3441 ** The return value of `backup-buffer' has changed.
3442 It is now a list of three elements, where the second element is a list
3443 describing the original file's SELinux context. If Emacs or the
3444 system lacks SELinux support, the context list is (nil nil nil nil).
3445 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3447 ** `char-direction-table' and the `char-direction' function were deleted.
3448 They were buggy and inferior to the new support of bidirectional
3449 editing introduced in Emacs 24. If you need the bidirectional
3450 properties of a character, use `get-char-code-property' with the last
3451 argument `bidi-class'.
3453 ** `copy-directory' now copies the source directory as a subdirectory
3454 of the target directory, if the latter is an existing directory. The
3455 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3456 the contents directly into a pre-existing target directory.
3458 ** For mouse click input events in the text area, the Y pixel
3459 coordinate in the POSITION list now counts from the top of the text
3460 area, excluding any header line. Previously, it counted from the top
3463 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3464 been further reduced. Now a backquote not followed by a space is
3465 always treated as a "new-style" backquote. Please remove all
3466 "old-style" backquotes from your code. If your code uses backquotes
3467 as documented in the Elisp manual, and compiles without warning, then
3468 you have nothing to do in this regard. Code not following the
3469 appropriate conventions may fail to compile.
3471 The most common cause of trouble seems to be an old-style backquote
3472 followed by a newline. Another cause of trouble is vector notation
3473 for key sequence notation: instead of [(control ,)] and [(control ')],
3474 you should write [(control ?,)] and [(control ?')], which will work in
3477 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3478 was not advertised at the time. The function `custom-initialize-delay'
3479 replaced all known uses.
3481 ** `view-buffer' now treats special mode-class in the same way that
3482 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3483 major mode is special).
3485 ** Menu and tool bar changes
3487 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3488 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3489 With these alist entries omitted, `make-frame' checks the value of the
3490 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3491 a menu-bar or tool-bar, respectively. If the alist entries are added,
3492 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3494 *** The menu bar bindings's caches are not used any more.
3495 Use (where-is-internal <def> nil t) instead.
3497 ** Regions created by mouse dragging are now normal active regions,
3498 similar to those created by shift-selection (see Selection changes
3499 above). In previous Emacs versions, these regions were delineated by
3500 `mouse-drag-overlay'; that variable has been removed.
3502 ** The fourth argument of `filter-buffer-substring' has been removed.
3503 If you want to remove text properties from the final result, simply
3504 pass the result through substring-no-properties.
3506 ** cl.el no longer provides `cl-19'.
3508 ** The following obsolete functions and aliases have been removed
3509 (the appropriate new function is given in parentheses; "not needed"
3510 means you can just remove all calls to the function in question):
3512 *** `comint-kill-output' (`comint-delete-output')
3513 *** `decompose-composite-char' (`char-to-string')
3514 *** `outline-visible' (`outline-invisible-p')
3515 *** `internal-find-face' (`facep')
3516 *** `internal-get-face' (`facep and check-face')
3517 *** `frame-update-faces' (not needed)
3518 *** `frame-update-face-colors' (`frame-set-background-mode')
3519 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3520 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3521 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3522 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3523 *** `x-make-font-unbold' (`make-face-unbold')
3524 *** `x-make-font-unitalic' (`make-face-unitalic')
3525 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3526 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3527 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3528 *** `char-bytes' (== 1)
3529 *** `isearch-return-char' (`isearch-printing-char')
3530 *** `make-local-hook' (not needed)
3531 *** `set-screen-height' (`set-frame-height')
3532 *** `set-screen-width' (`set-frame-width')
3534 ** The following obsolete variables and varaliases have been removed
3535 (the appropriate new variable is given in parentheses):
3537 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3538 *** `vc-header-alist' (`vc-BACKEND-header')
3539 *** `directory-sep-char' (== ?/)
3540 *** `font-lock-defaults-alist' (`font-lock-defaults')
3541 *** `e' (`float-e').
3543 ** The following obsolete files were removed:
3544 sc.el, x-menu.el, rnews.el, rnewspost.el
3546 ** The format of the finder-inf.el file has changed, since the Finder
3547 mechanism is now based on the package system. The variable
3548 `finder-package-info' is replaced by `package--builtins' and
3549 `finder-keywords-hash'.
3551 ** When generating autoloads, `update-directory-autoloads' no longer
3552 assumes every inspected file is in your `load-path'. It instead
3553 generates relative names according to the current `load-path'.
3556 * Lisp Changes in Emacs 24.1
3558 ** Code can now use lexical scoping by default instead of dynamic scoping.
3559 The `lexical-binding' variable enables lexical scoping for local
3560 variables. It is typically set via a file-local variable in the first
3561 line of the file, in which case it applies to all the code in that
3564 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3565 binding instead of the old dynamic binding mode.
3567 *** Lexically scoped interpreted functions are represented with a new form
3568 of function value which looks like (closure ENV ARGS &rest BODY).
3570 *** New macro `letrec' to define recursive local functions.
3572 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3573 So do `defcustom' and other forms that call `defvar' as a subroutine.
3575 *** New function `special-variable-p' to check whether a variable is
3576 declared as dynamically bound.
3578 *** The form ((lambda ...) ...) is deprecated.
3580 ** An Emacs Lisp testing tool is now included.
3581 Emacs Lisp developers can use this tool to write automated tests for
3582 their code. See the ERT info manual for details.
3584 ** Changes for bidirectional display and editing
3586 *** New function `current-bidi-paragraph-direction'.
3587 This returns the base direction of the paragraph at point.
3589 *** New function `bidi-string-mark-left-to-right'.
3590 Given a string containing characters from right-to-left scripts, this
3591 function returns another string which can be safely inserted into a
3592 buffer, such that any following text will be always displayed to the
3593 right of that string. (This works by appending an invisible Unicode
3594 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3596 This is useful when the buffer has overall left-to-right paragraph
3597 direction and you need to insert a string whose contents are not known
3598 in advance, without disrupting the layout of the line.
3602 *** Window tree functions are accessible in Elisp.
3603 Functions are provided to return the parent, siblings or child windows
3604 of any window including internal windows (windows not associated with a
3605 buffer) in the window tree.
3607 **** New function `window-valid-p' gives non-nil for live and internal
3610 **** Window manipulation can deal with internal windows.
3611 Many window handling functions like `split-window', `delete-window', or
3612 `delete-other-windows' as well as the window resizing functions can now
3613 act on any window including internal ones.
3615 *** window-total-height/-width vs window-body-height/-width.
3616 The function `window-height' has been renamed to `window-total-height'
3617 and `window-width' has been renamed to `window-body-width'. The old
3618 names are provided as aliases. Two new functions `window-total-width'
3619 and `window-body-height' are provided.
3621 *** Window parameters specific to window handling functions.
3622 For each window you can specify a parameter to override the default
3623 behavior of a number of functions like `split-window', `delete-window'
3624 and `delete-other-windows'. The variable `ignore-window-parameters'
3625 allows to ignore processing such parameters.
3627 *** New semantics of third argument of `split-window'.
3628 The third argument of `split-window' has been renamed to SIDE and can be
3629 set to any of the values 'below, 'right, 'above, or 'left to make the
3630 new window appear on the corresponding side of the window that shall be
3631 split. Any other value of SIDE will cause `split-window' to split the
3632 window into two side-by-side windows as before.
3634 *** Window resizing functions.
3635 A new standard function for resizing windows called `window-resize' has
3636 been introduced. This and all other functions for resizing windows no
3637 longer delete any windows when they become too small.
3639 *** Deleting the selected window now selects the most recently selected
3640 live window on that frame instead.
3642 *** `adjust-window-trailing-edge' adjustments.
3643 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3644 is able to resize other windows if a window adjacent to the trailing
3645 edge cannot be shrunk any more. This makes its behavior more similar to
3646 that of Emacs 21 without compromising, however, its inability to delete
3647 windows which was introduced in Emacs 22.
3649 *** Window-local buffer lists.
3650 Windows now have local buffer lists. This means that removing a buffer
3651 from display in a window will preferably show the buffer previously
3652 shown in that window with its previous window-start and window-point
3653 positions. This also means that the same buffer may be automatically
3654 shown twice even if it already appears in another window.
3656 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3657 which if non-nil requires the buffer to be displayed in the currently
3658 selected window, signaling an error otherwise. If nil, another window
3659 can be used, e.g. if the selected one is strongly dedicated.
3661 *** `split-window-vertically' and `split-window-horizontally' renamed
3662 to `split-window-below' and `split-window-right' respectively.
3663 The old names are kept as aliases.
3667 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3668 named ACTION, and takes a display action of the same form as
3669 `display-buffer-base-action' (see Changes, above). A non-nil,
3670 non-list value is treated specially, as the old meaning.
3672 **** New variable `display-buffer-overriding-action'.
3674 **** The procedure of `display-buffer' etc. to choose a window is
3675 determined by combining `display-buffer-overriding-action',
3676 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3677 and `display-buffer-fallback-action'. The second and fourth of these
3678 are user-customizable variables.
3680 See the docstring of `display-buffer' for details.
3682 *** New functions `window-state-get' and `window-state-put'.
3683 These functions allow to save and restore the state of an arbitrary
3684 frame or window as an Elisp object.
3688 *** New variable `completion-extra-properties' used to specify extra
3689 properties of the current completion:
3690 - :annotate-function, same as the old completion-annotate-function.
3691 - :exit-function, function to call after completion took place.
3693 *** Functions on `completion-at-point-functions' can return any of the
3694 properties valid for `completion-extra-properties'.
3696 *** `completion-annotate-function' is obsolete.
3698 *** New `metadata' method for completion tables. The metadata thus returned
3699 can specify various details of the data returned by `all-completions':
3700 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3701 used to select a style in completion-category-overrides.
3702 - `annotation-function' to add annotations in *Completions*.
3703 - `display-sort-function' to specify how to sort entries in *Completions*.
3704 - `cycle-sort-function' to specify how to sort entries when cycling.
3706 *** `minibuffer-local-filename-must-match-map' is not used any more.
3707 Instead, the bindings in `minibuffer-local-filename-completion-map'
3708 are combined with `minibuffer-local-must-match-map'.
3710 *** New variable `completing-read-function' allows overriding the
3711 behavior of `completing-read'.
3713 ** `glyphless-char-display' can now distinguish between graphical and
3714 text terminal display, via a char-table entry that is a cons cell.
3716 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3717 Instead, the offending function is removed.
3721 *** New function `run-hook-wrapped' for running an abnormal hook by
3722 passing the hook functions as arguments to a "wrapping" function.
3723 Like `run-hook-with-args-until-success', it stops at the first
3724 non-nil return value.
3726 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3727 set of "wrapping" filters, similar to around advice.
3728 (A version of this macro was actually added in Emacs 23.2 but was not
3729 advertised at the time.)
3733 *** New macro `condition-case-unless-debug' (this was actually added in
3734 Emacs 23.1 as condition-case-no-debug, but not advertised)
3736 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3738 *** Variable `stack-trace-on-error' removed.
3740 *** The debugger can now "continue" from an error, which means it will
3741 jump to the error handler as if the debugger had not been invoked
3742 instead of jumping all the way to the top-level.
3744 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3745 This can be useful when `inhibit-quit' is set.
3747 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3748 named Emacs server instances.
3750 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3751 to redirect STDOUT to a file.
3753 ** The function `format-time-string' now supports the %N directive,
3754 for higher-resolution time stamps.
3756 ** New input reading functions
3758 *** New function `read-char-choice' reads a restricted set of
3759 characters, discarding any inputs not inside the set.
3761 *** The command `read-color' now requires a match for a color name
3762 or RGB triplet, instead of signaling an error if the user provides
3765 **** `facemenu-read-color' is now an alias for `read-color'.
3767 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3768 The variable is now used to load all kind of supported dynamic libraries,
3769 not just image libraries. The previous name is still available as an
3772 ** Syntax parsing changes
3774 *** New variable `syntax-propertize-function'.
3775 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3776 This allows syntax-table properties to be set independently from font-lock:
3777 just call syntax-propertize to make sure the text is propertized.
3778 Together with this new variable come a new hook
3779 syntax-propertize-extend-region-functions, as well as two helper functions:
3780 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3781 as-is; and syntax-propertize-rules which provides a new way to specify
3784 *** Syntax tables support a new "comment style c" additionally to style b.
3786 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3788 ** frame-local variables cannot be let-bound any more.
3790 ** Major and minor mode changes
3792 *** `set-auto-mode' now respects mode: local variables at the end of files,
3793 as well as those in the -*- line.
3795 *** `prog-mode' is a new major mode from which programming modes
3798 **** `prog-mode-hook' can be used to enable features for programming
3799 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3800 on-the-fly spell checking for comments and strings.
3802 *** New hook `change-major-mode-after-body-hook', run by
3803 `run-mode-hooks' just before any other mode hooks.
3805 *** Enabled globalized minor modes can be disabled in specific major modes.
3806 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3807 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3809 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3811 ** File-handling changes
3813 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3814 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3815 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3816 argument is supplied (see Trash changes, above).
3818 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3820 ** Tool-bars can display separators.
3821 Tool-bar separators are handled like menu separators in menu-bar maps,
3822 i.e. via menu entries of the form `(menu-item "--")'.
3826 *** Animated images support (currently animated gifs only).
3828 **** `image-animated-p' returns non-nil if an image can be animated.
3830 **** `image-animate' animates a supplied image spec.
3832 **** `image-animate-timer' returns the timer object for an image that
3835 *** `image-extension-data' has been renamed to `image-metadata'.
3836 The old name is an obsolete alias to the new one.
3838 *** Image mode can view any image type that ImageMagick supports.
3839 This requires Emacs to be built with ImageMagick support.
3841 **** New function `imagemagick-types', defined if ImageMagick support
3842 is enabled, returns a list of image file extensions that your
3843 ImageMagick installation supports.
3845 **** New function `imagemagick-register-types' enables ImageMagick
3846 image types in Image mode and in `create-image' and other helper
3849 **** New option `imagemagick-types-inhibit' excludes certain
3850 ImageMagick image types from `imagemagick-register-types'.
3852 **** With ImageMagick support, there are extra Image mode commands to
3853 resize and rotate images: `image-transform-fit-to-height',
3854 `image-transform-fit-to-width', `image-transform-set-rotation', and
3855 `image-transform-set-scale'.
3857 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3858 passes it to the mail user agent function. This argument specifies an
3859 action for returning to the caller after finishing with the mail. For
3860 example, this is used by Rmail to optionally delete a mail window.
3862 ** XML and HTML parsing
3863 If Emacs is compiled with libxml2 support, there are two new
3864 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3865 and `libxml-parse-xml-region' (which parses XML). Both return an
3866 Emacs Lisp parse tree.
3868 ** Networking and encryption changes
3870 *** `open-network-stream' can now be used to open an encrypted stream.
3871 It now accepts an optional `:type' parameter for initiating a TLS
3872 connection, directly or via STARTTLS. To do STARTTLS, additional
3873 parameters (`:end-of-command', `:success', `:capabilities-command')
3874 must also be supplied.
3876 *** New library gnutls.el.
3877 The new function `gnutls-available-p' returns non-nil if Emacs is
3878 built with GnuTLS support. The main entry points are
3879 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3880 these functions through `open-network-stream', because that can
3881 upgrade connections through STARTTLS opportunistically or use plain
3882 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3885 *** New primitive `secure-hash' that supports many secure hash algorithms:
3886 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3887 sha1.el has been removed. The `sha1' feature is provided by default.
3891 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3893 ** Progress reporters can now "spin".
3894 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3895 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3896 time you call `progress-reporter-update' on that progress reporter,
3897 with a nil or omitted VALUE argument, the reporter message is
3898 displayed with a "spinning bar".
3900 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3901 being reverted, even if the buffer has a local `revert-buffer-function'.
3903 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3904 If delayed-warnings-list is non-nil, the command loop calls
3905 `delayed-warnings-hook' after `post-command-hook'. At present, this
3906 is only used by Emacs on some platforms to display warnings during
3907 startup, which might otherwise not be noticed. This uses the
3908 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3910 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3912 ** New function `make-composed-keymap' that constructs a new keymap
3913 from multiple input maps. You can use this to make a keymap that
3914 inherits from multiple maps, eg:
3915 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3917 ** New function `string-prefix-p'.
3918 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3920 ** New reader macro ## that stands for the empty symbol.
3921 This means that the empty symbol can now be read back. Also, #: by itself
3922 (when not immediately followed by a possible symbol character) stands for
3923 an empty uninterned symbol.
3925 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3927 ** The following functions and variables are obsolete:
3929 *** `tooltip-use-echo-area' is obsolete.
3930 Rather than setting this to t, disable Tooltip mode instead.
3932 *** buffer-substring-filters is obsolete.
3933 Use `filter-buffer-substring-functions' instead.
3935 *** `byte-compile-disable-print-circle' is obsolete.
3937 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3938 Use `post-command-hook' instead.
3940 *** `font-lock-maximum-size' is obsolete.
3943 * Changes in Emacs 24.1 on Non-Free Operating Systems
3945 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3946 and also when HOME is set to C:\ by default.
3948 ** New configure.bat options
3950 *** --enable-checking builds Emacs with extra runtime checks.
3952 *** --distfiles specifies files to be included in binary distribution.
3954 *** --without-gnutls disables automatic GnuTLS detection.
3956 *** --lib for general library linkage, works with the USER_LIBS build variable.
3958 ** New make target `dist' to create binary distribution for MS Windows.
3960 ** The Lisp function `w32-default-color-map' is now obsolete.
3961 (It is only used internally in the Emacs C code.)
3963 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3964 reappear on mouse-over. (Requires OS X 10.6 or later.)
3966 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3967 other platforms, rather than inserting its contents into the buffer.
3970 ----------------------------------------------------------------------
3971 This file is part of GNU Emacs.
3973 GNU Emacs is free software: you can redistribute it and/or modify
3974 it under the terms of the GNU General Public License as published by
3975 the Free Software Foundation, either version 3 of the License, or
3976 (at your option) any later version.
3978 GNU Emacs is distributed in the hope that it will be useful,
3979 but WITHOUT ANY WARRANTY; without even the implied warranty of
3980 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3981 GNU General Public License for more details.
3983 You should have received a copy of the GNU General Public License
3984 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3989 paragraph-separate: "[
\f]*$"