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.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as if they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
144 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
145 You can change the default by customizing `blink-cursor-blinks'.
148 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
149 This affects View mode, etc.
154 *** The command `apropos-variable' is renamed to `apropos-user-option'.
155 `apropos-user-option' shows all user options while `apropos-variable'
156 shows all variables. When called with a universal prefix argument,
157 the two commands swap their behaviors. When `apropos-do-all' is
158 non-nil, they output the same results.
161 *** The key `?' now describes prefix bindings, like `C-h'.
164 *** The command `describe-function' has been extended for EIEIO.
165 Running it on constructors will show a full description of the
166 generated class. For generic functions, it will show all
167 implementations together with links to the source. The old commands
168 `describe-class', `describe-constructor' and `describe-generic' were
172 *** The function `quail-help' is no longer an interactive command.
173 Use `C-h C-\' (`describe-input-method') instead.
178 *** ImageMagick images now support the :max-width and :max-height keywords.
181 *** When using `create-image' with image data, you can pass a :format
182 attribute (via the property-list argument) in order to help
183 ImageMagick detect the image type. The value should be a MIME
184 content-type that is found in the new variable `image-format-suffixes'.
186 ** Frame and window changes
189 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
190 bound to <f11> and M-<f10>, respectively.
193 *** New hooks `focus-in-hook', `focus-out-hook'.
194 These are normal hooks run when an Emacs frame gains or loses input focus.
196 *** Emacs can now change frame sizes in units of pixels, rather than
197 text rows or columns. When maximizing a frame or making it fullscreen,
198 remaining extra pixels are no longer given to the minibuffer, the rightmost
199 fringe, or other unusable space, but are distributed among the text
200 areas of the frame's windows. If the new option `frame-resize-pixelwise'
201 is non-nil, all frame size changes happen pixelwise and set the
202 corresponding size hints for the window manager.
204 *** Emacs can now change window sizes in units of pixels.
205 Mouse-dragging a mode line or window divider now changes the size of
206 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
207 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
208 resize windows pixelwise. Most functions for changing or accessing
209 window sizes now have an additional argument that allows changes to apply,
210 or values to be returned, in pixels instead of lines/columns.
212 *** Emacs can now draw dividers between adjacent windows. To put
213 dividers between side-by-side/vertically stacked windows customize the
214 frame parameters `right-divider-width' and `bottom-divider-width' to
215 some positive integer. You can drag dividers with the mouse (they show
216 a corresponding cursor when the mouse hovers over them). You can change
217 the appearance of dividers by customizing the faces `window-divider',
218 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
219 two are useful to provide a 3D effect, or to better distinguish dividers
220 from surrounding display objects.
222 *** New functions are provided to return the pixel sizes of window
223 components, namely `window-scroll-bar-width', `window-mode-line-height'
224 `window-header-line-height', `window-right-divider-width' and
225 `window-bottom-divider-width'.
227 *** The new function `window-text-pixel-size' returns the size of the
228 text of a window's buffer in pixels. This allows functions like
229 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
230 window to its buffer as it will be displayed.
232 *** `fit-window-to-buffer' can now resize windows horizontally.
233 This behavior is controlled by the new option
234 `fit-window-to-buffer-horizontally'.
236 *** `fit-frame-to-buffer' can now fit frames in both directions.
237 This behavior is controlled by the option `fit-frame-to-buffer' which
238 tells in which direction(s) the frame shall be fit. The new options
239 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
240 control the size of the frame and its position on screen.
242 *** Temp Buffer Resize Mode can now adjust height and width of windows
243 and frames. `temp-buffer-resize-mode' is now able to adjust the height
244 and the width of a window displaying a temporary buffer. The new option
245 `temp-buffer-max-width' allows to control the width of temporary buffer
246 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
247 and the buffer appears in the root window of a frame, Temp Buffer Resize
248 Mode will try to adjust width and/or height of the frame.
251 *** `split-window' is now a non-interactive function, not a command.
252 As a command, it was a special case of `C-x 2' (`split-window-below'),
253 and as such superfluous. After being reimplemented in Lisp, its
254 interactive form was mistakenly retained.
256 *** The functions `window-size' and `window-total-size' now have an
257 optional argument to return a rounded size value.
259 *** `window-state-put' now allows to put a window state into internal
263 *** New option `scroll-bar-adjust-thumb-portion'.
264 Available only on X, this option allows to control over-scrolling
265 using the scroll bar (i.e. dragging the thumb down even when the end
266 of the buffer is visible).
268 *** New basic action function `display-buffer-in-previous-window' has
269 `display-buffer' display a buffer in a window previously showing that
272 *** New basic action function `display-buffer-at-bottom' has
273 `display-buffer' choose or make a window at the bottom of the selected
276 ** Lisp evaluation changes
278 *** `eval-defun' on an already defined defcustom calls the :set function,
282 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
283 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
284 zero prefix argument. This disables truncation of lists in the output,
285 equivalent to setting `(eval-expression-)print-length' and
286 `(eval-expression-)print-level' to nil. Additionally, it causes integers
287 to be printed in other formats (octal, hexadecimal, and character).
290 *** New hook `eval-expression-minibuffer-setup-hook' run by
291 `eval-expression' on entering the minibuffer.
294 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
297 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
298 because it affects caching of paragraph scanning results as well.
299 There is no reason to set this to nil except for debugging purposes.
302 ** The option `set-mark-default-inactive' has been deleted.
303 This unfinished feature was introduced by accident in Emacs 23.1;
304 simply disabling Transient Mark mode does the same thing.
307 ** The default value of `comment-use-global-state' is now t,
308 and this variable has been marked obsolete.
311 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
312 and works for git too, if you fetch the repository notes.
315 ** New option `load-prefer-newer' affects how the `load' function chooses
316 the file to load. If this is non-nil, then when both .el and .elc
317 versions of a file exist, and the caller did not explicitly specify
318 which one to load, then the newer file is loaded. The default, nil,
319 means to always load the .elc file.
322 * Editing Changes in Emacs 24.4
324 ** Indentation changes
327 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
328 When invoked without a prefix argument, it now activates a transient
329 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
330 the text indentation in the region. Typing any other key resumes
331 normal editing behavior.
333 *** `electric-indent-mode' is enabled by default.
336 *** `tab-stop-list' is now implicitly extended to infinity by repeating
337 the last step. Its default value is changed to nil, which means a tab
338 stop every `tab-width' columns.
341 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
342 When called in succession, it cycles between spacing conventions:
343 one space, no spaces, original spacing.
346 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
347 a line after a one-letter word, which is an error in some typographical
348 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
351 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
353 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
354 Most commands are still unaware of it, but kill/yank do work on the rectangle.
357 ** New option `visual-order-cursor-movement'.
358 If this is non-nil, cursor motion with arrow keys will follow the
359 visual order of characters on the screen: <left> always moves to the
360 left, <right> always moves to the right, disregarding the surrounding
361 bidirectional context.
366 *** All interactive commands that read a register (`copy-to-register', etc.)
367 now display a temporary window after `register-preview-delay' seconds
368 that summarizes existing registers. To disable this, set that option to nil.
369 Interactive commands that read registers and want to make use of this
370 should use `register-read-with-preview' to read register names.
373 *** New command `frameset-to-register' bound to `C-x r f', replacing
374 `frame-configuration-to-register'. It offers similar functionality,
375 plus enhancements like the ability to restore deleted frames.
376 (`frame-configuration-to-register' still exists, but no longer has a
380 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
384 ** New command `delete-duplicate-lines'.
385 This searches the region for identical lines, and removes all but one
386 copy of each repeated line. The lines need not be sorted.
389 * Changes in Specialized Modes and Packages in Emacs 24.4
392 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
394 ~/.emacs.d/timelog replaces ~/.timelog
395 ~/.emacs.d/vip replaces ~/.vip
396 ~/.emacs.d/viper replaces ~/.viper
397 ~/.emacs.d/ido.last replaces ~/.ido.last
398 ~/.emacs.d/kkcrc replaces ~/.kkcrc
399 ~/.emacs.d/quickurls replaces ~/.quickurls
400 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
401 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
402 ~/.emacs.d/places replaces ~/.emacs-places
403 ~/.emacs.d/shadows replaces ~/.shadows
404 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
405 ~/.emacs.d/strokes replaces ~/.strokes
406 ~/.emacs.d/notes replaces ~/.notes
407 ~/.emacs.d/type-break replaces ~/.type-break
408 Also the following files used by the now obsolete otodo-mode.el:
409 ~/.emacs.d/todo-do replaces ~/.todo-do
410 ~/.emacs.d/todo-done replaces ~/.todo-done
411 ~/.emacs.d/todo-top replaces ~/.todo-top
413 ** Backtrace and debugger
416 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
417 display of local variables of the current stack frame.
419 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
420 the lexical environment when evaluating the code in the context at point
421 (and so allows you to access lexical variables).
424 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
427 ** Battery information can now be retrieved from BSD's `apm' utility.
430 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
432 ** Calendar and Diary
435 *** New faces `calendar-weekday-header', `calendar-weekend-header',
436 and `calendar-month-header'.
439 *** New option `calendar-day-header-array'.
442 *** New variable `diary-from-outlook-function', used by the command
443 `diary-from-outlook'.
446 *** The variable `calendar-font-lock-keywords' is obsolete.
451 *** Calc by default now uses the Gregorian calendar for all dates, and
452 uses January 1, 1 AD as its day number 1. Previously Calc used the
453 Julian calendar for dates before September 14, 1752, and it used
454 December 31, 1 BC as its day number 1; the new scheme is more
455 consistent with Calendar's calendrical system and day numbering.
458 *** The new option `calc-gregorian-switch' lets you configure if
459 (and when) Calc switches from the Julian to the Gregorian calendar.
462 *** Support for ISO 8601 dates.
468 **** The cpp-root project now supports executing a compile command.
469 It can be set through the new :compile-command slot or the
470 buffer-local variable `compile-command'.
472 **** Better selection of include directories for the 'linux' project.
473 Include directories now support out-of-tree build directories and
474 target architecture auto-detection.
478 **** Improved detection of used namespaces in current scope in C++.
480 **** Parsing of default values for variables and function arguments in C/C++.
481 They are also displayed by the summarize feature in the mode line.
483 **** Improved parsing of function pointers in C/C++.
484 This also includes parsing of function pointers as function arguments.
486 **** Parsing of C/C++ preprocessor macros that open new scope.
487 For example, this enables parsing of macros that open new namespaces.
489 **** Support for 'this' pointer in inline member functions in C++.
494 *** New macro `cl-tagbody'.
495 This executes statements while allowing for control transfer to labels.
498 *** letf is now just an alias for cl-letf.
503 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
504 Hence, you can now enable it independently from those modes, and from
505 `transient-mark-mode'.
508 *** `cua-highlight-region-shift-only' is now obsolete.
509 You can disable `transient-mark-mode' to get the same result.
512 *** CUA's rectangles can now be used without CUA by calling the command
513 `cua-rectangle-mark-mode'.
518 *** Support for completion, ElDoc, and Flycheck has been added.
521 *** The current CFEngine syntax is parsed from "cf-promises -s json".
522 There is a fallback syntax available if you don't have cf-promises or
523 if your version doesn't support that option. See option `cfengine-cf-promises'.
526 ** Delete Selection mode can now be used without Transient Mark mode.
531 *** `desktop-save-mode' by default now auto-saves an existing desktop file
532 after `desktop-auto-save-timeout'. To disable this, customize that option
535 *** `desktop-restore-frames', enabled by default, allows saving and
536 restoring the frame/window configuration (frameset). Additional options
537 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
538 and `desktop-restore-forces-onscreen' offer further customization.
541 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
542 such as file ownership or permissions, are visible.
545 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
546 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
547 The results display in the mode line.
549 ** Electric Pair mode
552 *** New option `electric-pair-preserve-balance', enabled by default.
553 If non-nil, pairing/skipping only kicks in when that help the balance
554 of parentheses and quotes, i.e. the buffer should end up at least as
557 You can further control this behavior by adjusting the predicates
558 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
561 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
562 In `electric-pair-mode', the commands `backward-delete-char' and
563 `backward-delete-char-untabify' are now bound to electric variants
564 that delete the closer when invoked between adjacent pairs.
567 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
568 In `electric-pair-mode', inserting a newline between adjacent pairs
569 opens an extra newline after point, which is indented if
570 `electric-indent-mode' is also set.
573 *** New option `electric-pair-skip-whitespace', enabled by default.
574 This controls if skipping over closing delimiters should jump over any
575 whitespace slack. Setting it to `chomp' makes it delete this
576 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
579 *** New variables control the pairing in strings and comments.
580 You can customize `electric-pair-text-pairs' and
581 `electric-pair-text-syntax-table' to tweak pairing behavior inside
582 strings and comments.
585 ** New EPA option `epa-mail-aliases'.
586 You can set this to a list of email address aliases that `epa-mail-encrypt'
587 should use to find keys.
590 ** New ERC option `erc-accidental-paste-threshold-seconds'.
591 If set to a number, this can be used to avoid accidentally pasting large
592 amounts of data into the ERC input.
595 ** New ERT macro `skip-unless' allows skipping ERT tests.
596 See the ERT manual for details.
601 *** `eshell' now supports visual subcommands and options.
602 Eshell has been able to handle "visual" commands (interactive,
603 non-line oriented commands such as top that require display
604 capabilities not provided by eshell) by running them in an Emacs
605 terminal emulator. See `eshell-visual-commands'.
607 This feature has been extended to subcommands and options that make a
608 usually line-oriented command a visual command. Typical examples are
609 "git log" and "git <command> --help", which display their output in a
610 pager by default. See `eshell-visual-subcommands' and
611 `eshell-visual-options'.
614 *** New Eshell-Tramp module.
615 External su and sudo commands are now the default; the internal,
616 Tramp-using variants can still be used by enabling the eshell-tramp
620 ** New F90 mode option `f90-smart-end-names'.
623 Icomplete is now more similar to Ido.
626 *** Icomplete by default now applies to all forms of minibuffer completion.
627 The variable `icomplete-with-completion-tables' (now a user option)
628 controls this. To restore the old behavior, set it back to
629 '(internal-complete-buffer).
632 *** You can navigate through and select completions using the keys
633 from `icomplete-minibuffer-map'.
636 *** The string that separates potential completions is now a customizable
637 option (`icomplete-separator'). The default is " | " rather than ",".
640 *** New face `icomplete-first-match'; and new options
641 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
644 *** The option `icomplete-show-key-bindings' has been removed.
649 *** An Ido user manual is now included.
652 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
653 This means to use virtual buffers if the current ido input does not match
657 *** The variable `ido-decorations' can optionally have two new elements,
658 which are the brackets to use around the sole remaining completion.
663 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
664 visit the next image file and the previous image file in the same
665 directory, respectively.
668 *** New commands to show specific frames of multi-frame images.
669 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
670 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
673 *** New commands to speed up, slow down, or reverse animation.
674 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
675 speed up and slow down the animation. `a r' (`image-reverse-speed')
676 to reverse it and `a 0' (`image-reset-speed') to reset it.
679 *** The command `image-mode-fit-frame' deletes other windows.
680 When toggling, it restores the frame's previous window configuration.
681 It also has an optional frame argument, which can be used by Lisp
682 callers to fit the image to a frame other than the selected frame.
687 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
688 the symbol found near point.
691 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
692 will cycle through faces in `hi-lock-face-defaults' without prompting.
695 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
700 *** New Info face `info-index-match', used to highlight matches in index
701 entries displayed by `Info-index-next', `Info-virtual-index' and
705 *** The Info-edit command is obsolete. Editing Info nodes by hand
706 has not been relevant for some time.
711 *** New option `js-switch-indent-offset'.
714 *** Better indentation of multiple-variable declarations.
715 If a declaration spans several lines, variables on the following lines
716 are lined up to the first one.
719 *** Recognition and better indentation of continuations in array comprehensions.
722 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
727 *** Font locking for texinfo comments and new keywords.
729 *** Completion in Octave file buffers.
733 *** Jump to definition.
735 *** Documentation lookup/search.
738 ** OPascal mode is the new name for Delphi mode
741 *** All delphi-* variables and functions have been renamed to opascal-*.
742 Obsolete aliases exist for those likely to have been used externally.
745 *** The option `delphi-newline-always-indents' has been removed.
746 Use `electric-indent-mode' instead.
749 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
754 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
755 to filter the list of packages by a keyword.
758 *** In the `describe-package' buffer, there are now buttons listing the
759 keywords related to the package. Click on a button to see other packages
760 related to that keyword.
763 *** The format of `archive-contents' files, generated by package
764 repositories, has changed to allow a new (fifth) element in the data
765 vectors, containing an associative list with extra properties.
766 (For example, `describe-package' uses the `:url' extra property to
767 display a "Homepage" header.)
770 ** In Prolog mode, `prolog-use-smie' has been removed,
771 along with the non-SMIE indentation code.
776 *** The new command `remember-notes' creates a buffer that is saved on exit.
777 You can use it as a more permanent *scratch* buffer.
780 *** Remember can now store notes in separate files.
781 To use this, add `remember-store-in-files' to the `remember-handler-functions'
782 option. The files are saved in `remember-data-directory' using
783 names specified by `remember-directory-file-name-format'.
788 *** Customize `rmail-mbox-format' to influence some minor aspects of
789 how Rmail displays non-MIME messages.
792 *** The `unrmail' command now converts from BABYL to mboxrd format,
793 rather than mboxo. Customize `unrmail-mbox-format' to change this.
798 *** Improved syntax highlighting and indentation.
801 *** New `electric-indent-mode' integration.
804 *** New option `ruby-encoding-magic-comment-style'.
807 *** New option `ruby-custom-encoding-magic-comment-template'.
810 *** New option `ruby-align-to-stmt-keywords'.
813 *** New option `ruby-align-chained-calls'.
816 *** More Ruby file types have been added to `auto-mode-alist'.
818 ** Search and Replace
821 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
822 starts a symbol (identifier) incremental search forward with the
823 symbol found near point added to the search string initially.
826 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
827 and adds it to the search string.
829 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
831 *** `query-replace' skips invisible text when `search-invisible' is nil,
832 and opens overlays with hidden text when `search-invisible' is `open'.
835 *** A negative prefix arg of replacement commands replaces backward.
836 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
837 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
840 *** By default, prefix arguments do not now terminate Isearch mode.
841 Set `isearch-allow-prefix' to nil to restore old behavior.
844 *** More Isearch commands accept prefix arguments, namely
845 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
849 *** Word search now matches whitespace at the beginning/end
850 of the search string if it contains leading/trailing whitespace.
851 In an incremental word search or when using a non-nil LAX argument
852 of `word-search-regexp', the lax matching can also match part of
853 the first word (in addition to the lax matching of the last word).
854 The same rules are now applied to the symbol search with the difference
855 that it matches symbols, and non-symbol characters between symbols.
858 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
861 ** The shell.el option `explicit-bash-args' includes --noediting by default.
862 All non-ancient Bash versions support this option.
867 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
870 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
872 ** SMIE indentation can be customized via `smie-config'.
873 Emacs can learn the appropriate indentation settings if you provide it
874 with an indented sample file.
879 *** Improved login monitoring and appropriate response to login failures.
880 New variable `sql-login-delay' defines maximum wait time for a connection.
883 SQL*Plus script placeholders are properly highlighted and identified
884 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
885 are passed before the logon parameter, as required. The default now
886 includes `-L', to limit the number of logon attempts per invocation.
889 ** New Term mode option `term-suppress-hard-newline'.
892 ** Todo mode has been rewritten and enhanced.
893 The Todo mode user manual describes all commands and most user
894 options. To support some of these features, a new file format is
895 used, which is incompatible with the old format; however, you can
896 convert old todo and done item files to the new format on initializing
897 the first new todo file, or at any later time with the provided
898 conversion command. The previous version of todo-mode.el has been
899 renamed to otodo-mode.el and is now obsolete. New features include:
901 *** Support for multiple todo files and archive files of done items.
903 *** Renaming, reordering, moving, merging, and deleting categories.
905 *** Sortable tabular summaries of categories and the item types they contain.
907 *** Cross-category lists of items filtered by specific criteria.
909 *** More fine-grained interaction with the Emacs diary, by being able to
910 decide for each todo item whether it appears in the Fancy Diary display.
912 *** Highly flexible new item insertion and item editing.
914 *** Moving items between categories, storing done items in their category
915 or in archive files, undoing or unarchiving done items.
917 *** Reprioritizing items by inputting a numerical priority.
919 *** Extensive customizability of operation and display, including many faces.
924 *** `trace-function' and `trace-function-background' no longer prompt for
925 the output buffer. Unless you use a prefix argument, they output to
929 *** With a prefix argument, `trace-function' and `trace-function-background'
930 will prompt for a "context". This is a Lisp expression, whose value at the
931 time the function is entered/exited is printed along with the function's
937 *** The experimental url syntax for remote file names has been removed.
940 *** New connection method "adb", which allows to access Android
941 devices by the Android Debug Bridge. The variable `tramp-adb-program'
942 can be used to adapt the path of the "adb" program, if needed.
945 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
946 "scpc" and "rsyncc" are discontinued. The ssh option
947 "ControlMaster=auto" is set automatically in all ssh-based methods,
948 when possible. See `tramp-use-ssh-controlmaster-options'.
951 *** Handlers for `file-acl' and `set-file-acl' for remote machines
952 which support POSIX ACLs.
955 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
956 for remote machines which support filesystem notifications.
959 ** New URL command `url-cookie-list' displays the current cookies,
960 and allows you to interactively remove cookies.
962 ** VC and related modes
965 *** In VC directory mode, `D' displays diffs between VC-controlled
966 whole tree revisions.
969 *** In VC directory mode, `L' lists the change log for the current VC
970 controlled tree in a window.
973 *** In VC directory mode, `I' shows a log of changes that will be
974 received with a pull operation.
977 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
978 under current version control system. When called with a prefix
979 argument, you can remove a file from the ignored file list.
984 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
987 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
990 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
991 are obsolete. Customize the `woman-*' faces instead.
996 *** iswitchb.el; use icomplete-mode.
999 *** longlines.el; use visual-line-mode.
1008 *** terminal.el; use term.el instead.
1011 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1014 *** xesam.el (owing to the cancellation of the XESAM project).
1017 *** yow.el; use fortune.el or cookie1.el instead.
1020 * New Modes and Packages in Emacs 24.4
1023 ** New package `eww' is a built-in web browser.
1024 It is only available if Emacs is compiled with libxml2 support.
1027 ** New minor mode `superword-mode'.
1028 This overrides the default word motion commands to treat "symbol_words"
1029 as a single word, similar to what `subword-mode' does.
1032 ** New package nadvice.el offers lighter-weight advice facilities.
1035 *** add-function/remove-function, which can be used to add/remove code on any
1036 function-carrying place, such as process-filters or `<foo>-function' hooks.
1038 *** advice-add/advice-remove to add/remove a piece of advice on a named
1039 function, much like `defadvice' does.
1041 ** New package frameset.el.
1042 It provides a set of operations to save a frameset (the state of all
1043 or a subset of the existing frames and windows, somewhat similar to a
1044 frame configuration), both in-session and persistently, and restore it
1045 at some point in the future.
1048 ** New package filenotify.el provides an interface for file system
1049 notifications. It requires that Emacs be compiled with one of the
1050 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1053 * Incompatible Lisp Changes in Emacs 24.4
1056 ** `kill-region' has lost its `yank-handler' optional argument.
1059 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1060 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1063 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1066 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1067 Some languages match those as »...«, and others as «...», so it is
1068 better for Emacs to stay neutral by default.
1071 ** In compiled Lisp files, the header no longer includes a timestamp.
1074 ** The default file coding for Emacs Lisp files is now utf-8.
1075 (See `file-coding-system-alist'.) In most cases, this change is
1076 transparent, but files that contain unusual characters without
1077 specifying an explicit coding system may fail to load with obscure
1078 errors. You should either convert them to utf-8 or add an explicit
1082 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1083 It used to disable the minor mode, major mode, and text-property keymaps,
1084 whereas now it simply has higher precedence.
1087 ** Default process filters and sentinels are not nil any more.
1088 Instead they default to a function that does what the nil value used to do.
1091 ** `read-event' does not return decoded chars in ttys any more.
1092 As was the case in Emacs 22 and before, the decoding of terminal
1093 input, according to `keyboard-coding-system', is not performed in
1094 `read-event' any more. But unlike in Emacs 22, this decoding is still
1095 done before input-decode-map, function-key-map, etc.
1098 ** The option `inhibit-local-menu-bar-menus' has been removed.
1101 ** Frame-local variables that affect redisplay do not work any more.
1102 More specifically, redisplay does not bother to check for a frame-local
1103 value when looking up variables.
1106 ** nil and "unbound" are indistinguishable in `symbol-function'.
1107 `symbol-function' does not signal a `void-function' error any more.
1108 To determine if a symbol's function definition is void, use `fboundp'.
1111 ** `defadvice' does not honor the `freeze' flag and cannot advise
1112 special-forms any more.
1115 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1116 when lexical binding is enabled. Previously, VAR was bound to nil,
1117 which often led to spurious unused-variable warnings.
1120 ** The return value of `backup-buffer' has changed.
1121 The second argument is no longer an SELinux context, instead it is an
1122 alist of extended attributes as returned by the new function
1123 `file-extended-attributes'. The attributes can be applied to another
1124 file using `set-file-extended-attributes'.
1127 ** By default `copy-file' no longer copies file permission bits to an
1128 existing destination; and it sets the file permission bits of a newly
1129 created destination to those of the source, masked by the default file
1130 permissions. To copy the file permission bits, pass t as the
1131 PRESERVE-PERMISSIONS argument of `copy-file'.
1134 ** `visited-file-modtime' now returns -1 for nonexistent files.
1135 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1136 in the presence of files with negative time stamps.
1139 ** The cars of the elements in `interpreter-mode-alist' are now
1140 treated as regexps rather than literal strings.
1143 * Lisp Changes in Emacs 24.4
1146 ** The second argument of `eval' can now specify a lexical environment.
1149 ** New functions `special-form-p' and `macrop'.
1151 ** New macro `define-alternatives' can be used to define generic commands.
1152 Generic commands are interactive functions whose implementation can be
1153 selected among several alternatives, as a matter of user preference.
1156 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1157 on that symbol will use the associated value as a function to call
1161 ** New variable `enable-dir-local-variables'.
1162 Directory-local variables are ignored if this is nil. This may be
1163 useful for modes that want to ignore directory-locals while still
1164 respecting file-local variables.
1167 ** New function `get-pos-property'.
1170 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1171 as a function to call to provide default values.
1173 ** Completion changes
1175 *** The separator for `completing-read-multiple' can now be a regexp.
1176 The default separator has been changed to allow surrounding spaces
1179 *** The `common-substring' arg of `display-completion-list' is obsolete.
1180 Either use `completion-all-completions', which returns highlighted
1181 strings (including for partial or substring completion), or call
1182 `completion-hilit-commonality' to add the highlight.
1184 *** New function `completion-table-with-cache' is a wrapper for
1185 `completion-table-dynamic' that caches the result of the last lookup.
1187 *** New function `completion-table-merge' to combine several
1188 completion tables by merging their completions.
1190 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1191 let you enable symbol prettification (replacing a string like "lambda" with
1192 the Greek lambda character).
1197 *** Functions to pop up menus and dialogs now work on all terminals,
1198 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1199 `message-box', `yes-or-no-p', etc.
1201 The function `display-popup-menus-p' will now return non-nil for a
1202 display or frame whenever a mouse is supported on that display or
1206 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1209 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1210 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1214 *** New display action function `display-buffer-no-window' to not
1215 display the buffer in a window.
1217 *** New display action alist entry `allow-no-window' to indicate the
1218 caller of `display-buffer' is ready to handle the case of not
1219 displaying the buffer in a window.
1221 ** New hook `pre-redisplay-function'.
1224 ** New bool-vector set operation functions
1225 *** `bool-vector-exclusive-or'
1226 *** `bool-vector-union'
1227 *** `bool-vector-intersection'
1228 *** `bool-vector-set-difference'
1229 *** `bool-vector-not'
1230 *** `bool-vector-subsetp'
1231 *** `bool-vector-count-consecutive'
1232 *** `bool-vector-count-population'
1235 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1237 ** Error-handling changes
1240 *** New function `define-error'.
1243 *** `with-demoted-errors' takes an additional argument `format'.
1246 ** New macro `with-eval-after-load'.
1247 This is like the old `eval-after-load', but better behaved.
1250 ** New library subr-x.el with miscellaneous small utility functions
1251 *** `hash-table-keys'
1252 *** `hash-table-values'
1253 *** `string-blank-p'
1254 *** `string-empty-p'
1256 *** `string-reverse'
1257 *** `string-trim-left'
1258 *** `string-trim-right'
1260 *** `string-remove-prefix'
1261 *** `string-remove-suffix'
1264 ** Obsoleted functions
1267 *** `lisp-complete-symbol'
1268 *** `field-complete'
1269 *** `minibuffer-completion-contents'
1270 *** `isearch-nonincremental-exit-minibuffer'
1271 *** `isearch-filter-visible'
1272 *** `generic-make-keywords-list'
1273 *** `get-upcase-table' (use `case-table-get-table' instead).
1275 ** `with-wrapper-hook' is obsoleted by `add-function'.
1276 The few hooks that used with-wrapper-hook are replaced as follows:
1277 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1278 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1279 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1282 ** `byte-compile-interactive-only-functions' is now obsolete.
1283 To specify that a command should only be called interactively, give it
1284 a non-nil `interactive-only' property.
1287 ** `split-string' now takes an optional argument TRIM.
1288 The value, if non-nil, is a regexp that specifies what to trim from
1289 the start and end of each substring.
1292 ** New function `string-suffix-p'.
1294 ** File-handling changes
1297 *** Support for filesystem notifications.
1298 Emacs now supports notifications of filesystem changes, such as
1299 creation, modification, and deletion of files. This requires the
1300 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1301 MS-Windows systems, this is supported for Windows XP and newer
1305 *** The 9th element returned by `file-attributes' is now unspecified.
1306 Formerly, it was t if the file's gid would change if file were deleted
1307 and recreated. This value has been inaccurate for years on many
1308 platforms, and nobody seems to have noticed or cared.
1311 *** The 6th argument to `copy-file' has been renamed to
1312 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1313 Unix file permission bits as well as SELinux context.
1316 *** The function `file-ownership-preserved-p' now has an optional
1317 argument GROUP which causes it check for file group too. This can be
1318 used in place of the 9th element of `file-attributes'.
1321 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1322 argument, with the same interpretation as the returned value of
1323 `visited-file-modtime'.
1325 ** Autorevert changes
1328 *** If Emacs is compiled with file notification support, notifications
1329 are used instead of checking the time stamp of the files. You can
1330 disable this by setting the user option `auto-revert-use-notify' to
1331 nil. Alternatively, a regular expression of directories to be
1332 excluded from file notifications can be specified by
1333 `auto-revert-notify-exclude-dir-regexp'.
1336 *** The new user option `auto-revert-remote-files' enables reversion
1337 of remote files when set to non-nil.
1341 *** The function `face-spec-set' is now like `setq' for face specs.
1342 Its third arg now accepts values specifying a face spec type (defface,
1343 custom, or override spec), and the relevant spec is set accordingly.
1346 *** New function `add-face-text-property', which can be used to
1347 conveniently prepend/append new face properties.
1349 *** Face specs set via Custom themes now replace the `defface' spec
1350 rather than inheriting from it (as do face specs set via Customize).
1352 *** New face characteristic (supports :underline (:style wave))
1353 specifies whether or not the terminal can display a wavy line.
1356 *** New face spec attribute :distant-foreground
1357 specifies foreground to use if background color is near the foreground
1358 color that would otherwise have been used.
1363 *** `image-animated-p' is now `image-multi-frame-p'.
1364 It returns non-nil for any image that contains multiple frames,
1365 whether or not it specifies a frame delay.
1368 *** New variable `image-default-frame-delay' gives the frame delay for
1369 animated images which do not specify a frame delay.
1372 *** New functions `image-current-frame' and `image-show-frame' for getting
1373 and setting the current frame of a multi-frame image.
1378 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1379 **** object-name -> eieio-object-name
1380 **** object-class -> eieio-object-class
1381 **** object-class-fast -> eieio--object-class
1382 **** object-class-name -> eieio-object-class-name
1383 **** object-name-string -> eieio-object-name-string
1384 **** object-num-slots -> eieio--object-num-slots
1385 **** object-set-name-string -> eieio-object-set-name-string
1386 **** class-of -> eieio-object-class
1387 **** class-name -> eieio-class-name
1388 **** class-parent -> eieio-class-parent
1389 **** class-parents -> eieio-class-parents
1390 **** class-parents-fast -> eieio-class-parents-fast
1391 **** class-children -> eieio-class-children
1392 **** class-num-slots -> eieio--class-num-slots
1393 **** class-precedence-list -> eieio-class-precedence-list
1394 **** class-direct-subclasses -> eieio-class-children
1395 **** class-direct-superclasses -> eieio-class-parents
1397 ** Changes in encoding and decoding of text
1400 *** New coding-system `prefer-utf-8'.
1401 This is like `undecided' but prefers UTF-8 on decoding if the text to
1402 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1403 any non-ASCII characters are automatically encoded as UTF-8.
1406 *** New attributes of coding-systems whose type is `undecided'.
1407 Two new attributes, `:inhibit-null-byte-detection' and
1408 `:inhibit-iso-escape-detection', determine how to detect encoding of
1409 text that includes null bytes and ISO-2022 escape sequences,
1410 respectively. Each of these attributes can be either nil, zero, or
1411 t. If it is t, decoding text ignores null bytes and, respectively,
1412 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1413 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1414 text is encoded in one of the ISO-2022 encodings, such as
1415 iso-2022-7bit. If the value is zero, Emacs consults the variables
1416 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1418 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1419 UTF-8 encoding and decoding, whenever possible.
1421 These attributes are only meaningful for coding-systems of type
1422 `undecided'. (The type of a coding-system is determined by its
1423 `:coding-type' attribute and can be accessed by calling the
1424 `coding-system-type' function.)
1427 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1430 ** New functions `group-gid' and `group-real-gid'.
1433 ** The spelling of the rx.el category `chinese-two-byte' has been
1434 corrected (the first 'e' was missing).
1437 ** Minor internal changes to the details of lock files.
1438 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1439 If DIR/.#FILE already exists and is not an Emacs lock file,
1440 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1441 numbered lock files DIR/.#FILE.0...).
1442 On file systems that do not support symbolic links, the lock is now a
1443 regular file with contents being what would have been in the symlink.
1445 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1448 *** The package descriptor and name of global variables, constants,
1449 and functions should be separated by two hyphens if the symbol is not
1450 meant to be used by other packages.
1453 * Changes in Emacs 24.4 on Non-Free Operating Systems
1456 ** The procedure for building Emacs on MS-Windows has changed.
1457 It is now built by running the same configure script as on all other
1458 platforms. This requires the MSYS environment and MinGW development
1459 tools. See the updated instructions in nt/INSTALL for details.
1461 Using the Posix configure script and Makefile's also means a change in
1462 the directory structure of the Emacs installation on Windows. It is
1463 now the same as on GNU and Unix systems. In particular, the auxiliary
1464 programs, such as cmdproxy.exe and hexl.exe, are in
1465 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1466 version), version-independent site-lisp is in share/emacs/site-lisp,
1467 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1468 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1469 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1470 directories and will find the files in there automatically; there's no
1471 need to set any variables due to this change.)
1474 ** Emacs on Windows 2000 and later can now access files and directories
1475 whose names cannot be encoded in the current system codepage.
1477 The new variable `w32-unicode-filenames' controls this feature: if it
1478 is t, Emacs uses Unicode APIs to pass file names to system calls,
1479 which lifts the limitation of file names to the current locale.
1482 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1483 The backtrace is written to the 'emacs_backtrace.txt' file in the
1484 directory where Emacs was running.
1487 ** The variable `buffer-file-type' is no longer supported.
1488 Setting it has no effect, and %t in the mode-line format is ignored.
1489 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1490 modifying it has no effect.
1493 ** Lock files now work on MS-Windows.
1494 This helps to prevent losing your edits if the same file is being
1495 edited in another Emacs session or by another user. See the node
1496 "Interlocking" in the Emacs User Manual for the details. To disable
1497 file locking, customize `create-lockfiles' to nil.
1499 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1500 GNUstep and Mac OS X 10.4 use the old font backend.
1501 To use the old backend by default, do on the command line:
1502 % defaults write org.gnu.Emacs FontBackend ns
1504 ** Improved fullscreen support on Mac OS X.
1505 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1506 Customize `ns-use-native-fullscreen' to change the style.
1507 For Mac OS X 10.7 and newer, native is the default.
1509 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1510 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1511 does not apply to images.
1514 * Installation Changes in Emacs 24.3
1516 ** The default X toolkit is now Gtk+ version 3.
1517 If you don't pass `--with-x-toolkit' to configure, or if you use
1518 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1519 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1520 You can explicitly require a specific version by passing
1521 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1523 ** New configure option `--enable-link-time-optimization', to utilize
1524 an appropriate feature provided by GCC since version 4.5.0.
1526 ** New configure option `--without-all' to disable most of the optional
1527 features (image support, etc.) that are normally enabled by default.
1529 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1530 Emacs). If building with GCC, this enables compile-time checks that
1531 warn/give errors about possibly-questionable C code. On a recent GNU
1532 system there should be no warnings; on older and on non-GNU systems
1533 the results may be useful to developers.
1535 ** The configure option `--enable-use-lisp-union-type' has been
1536 renamed to `--enable-check-lisp-object-type', as the resulting
1537 Lisp_Object type no longer uses a union to implement the compile time
1538 check that this option enables.
1540 ** The configure option `--disable-maintainer-mode' has been removed,
1541 as it was confusingly-named and rarely useful.
1543 ** The configure options `--program-prefix', `--program-suffix', and
1544 `--program-transform-name' apply to more than just the installed
1545 binaries. Now they also affect the man pages, icons, and the
1546 etc/emacs.desktop file; but not the info pages, since this would break
1547 links between the various manuals.
1549 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1550 overwriting "emacs" in the installation bin/ directory with a link
1553 ** Emacs uses libtinfo in preference to libncurses, if available.
1555 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1556 /usr/pkg/lib to the linker search path. You must add them yourself if
1559 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1560 (from the bin and libexec directories, respectively). The former is
1561 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1564 * Startup Changes in Emacs 24.3
1566 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1567 lisp/ directory. There should not be any there anyway. If you have
1568 been adding them there, put them somewhere else; e.g., site-lisp.
1570 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1573 * Changes in Emacs 24.3
1577 *** `C-h f' (`describe-function') can now perform autoloading.
1578 When this command is called for an autoloaded function whose docstring
1579 contains a key substitution construct, that function's library is
1580 automatically loaded, so that the documentation can be shown
1581 correctly. To disable this, set `help-enable-auto-load' to nil.
1583 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1584 even after their associated libraries have been loaded (and the
1585 autoloads have been redefined as functions).
1589 *** Images displayed via ImageMagick now support transparency and the
1590 :background image specification property.
1592 *** When available, ImageMagick support is automatically enabled.
1593 It is no longer necessary to call `imagemagick-register-types'
1594 explicitly to install ImageMagick image types; that function is called
1595 automatically at startup, or when customizing an imagemagick- option.
1597 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1598 ImageMagick to view images. (You must call `imagemagick-register-types'
1599 afterwards if you do not use customize to change this.)
1601 *** The new variable `imagemagick-enabled-types' also affects which
1602 ImageMagick types are treated as images. The function
1603 `imagemagick-filter-types' returns the list of types that will be
1608 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1609 next and previous path separator, respectively.
1611 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1612 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1613 non-nil before enabling the mode.
1617 *** New option `mode-line-default-help-echo' specifies the help text
1618 (shown in a tooltip or in the echo area) for any part of the mode line
1619 that does not have its own specialized help text.
1621 *** You can now click mouse-3 in the coding system indicator to invoke
1622 `set-buffer-file-coding-system'.
1624 ** Server and client
1626 *** emacsclient now obeys string values for `initial-buffer-choice',
1627 if it is told to open a new frame without specifying any file to visit
1628 or expression to evaluate.
1630 *** New option `server-auth-key' specifies a shared server key.
1632 ** Emacs now generates backtraces on fatal errors.
1633 On encountering a fatal error, Emacs now outputs a textual description
1634 of the fatal signal, and a short backtrace on platforms like glibc
1635 that support backtraces.
1637 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1638 This minor mode replaces `toggle-read-only', which is now obsolete.
1640 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1641 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1642 respectively, without exiting from the prompt.
1644 ** In the Package Menu, newly-available packages are listed as "new",
1645 and sorted above the other "available" packages by default.
1647 ** If your Emacs was built from a repository checkout, the new variable
1648 `emacs-bzr-version' contains information about the bzr revision used.
1650 ** New option `create-lockfiles' specifies usage of lockfiles.
1651 It defaults to t. Changing it to nil inhibits the creation of lock
1652 files (use this with caution).
1654 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1655 variables on remote hosts.
1657 ** The entry for PCL-CVS has been removed from the Tools menu.
1658 The PCL-CVS commands are still available via the keyboard.
1660 ** Using "unibyte: t" in Lisp source files is obsolete.
1661 Use "coding: raw-text" instead.
1663 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1664 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1665 The previous binding, introduced in Emacs 24.1, was a mistake, because
1666 `C-c LETTER' bindings are reserved for user customizations.
1668 ** Internationalization
1670 *** New language environment: Persian.
1672 *** New input method `vietnamese-vni'.
1674 ** Nextstep (GNUstep / Mac OS X) port
1676 *** Support for fullscreen and the frame parameter fullscreen.
1678 *** A file dialog is used for open/save operations initiated from the
1682 * Editing Changes in Emacs 24.3
1684 ** Search and Replace
1686 *** Non-regexp Isearch now performs "lax" space matching.
1687 Each sequence of spaces in the supplied search string may match any
1688 sequence of one or more whitespace characters, as specified by the
1689 variable `search-whitespace-regexp'. (This variable is also used by a
1690 similar existing feature for regexp Isearch.)
1692 *** New Isearch command `M-s SPC' toggles lax space matching.
1693 This applies to both ordinary and regexp Isearch.
1695 *** New option `replace-lax-whitespace'.
1696 If non-nil, `query-replace' uses flexible whitespace matching too.
1699 *** Global `M-s _' starts a symbol (identifier) incremental search,
1700 and `M-s _' in Isearch toggles symbol search mode.
1701 `M-s c' in Isearch toggles search case-sensitivity.
1703 ** Navigation commands
1705 *** New binding `M-g c' for `goto-char'.
1707 *** New binding `M-g TAB' for `move-to-column'.
1709 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1710 interactively with no prefix arg. Previously, it moved to column 1.
1712 ** New option `yank-handled-properties' allows processing of text
1713 properties on yanked text, in ways that are more general than just
1714 removing them (as is done by `yank-excluded-properties').
1716 ** New option `delete-trailing-lines' specifies whether
1717 M-x delete-trailing-whitespace should delete trailing lines at the end
1718 of the buffer. It defaults to t.
1720 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1722 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1723 `ucs-insert' is now an obsolete alias for `insert-char'.
1725 ** The `z' key no longer has a binding in most special modes.
1726 It used to be bound to `kill-this-buffer', but `z' is too easy to
1729 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1730 It copies the region-rectangle as the last rectangle kill.
1734 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1736 *** New option `register-separator' specifies the register containing
1737 the text to put between collected texts for use with
1738 M-x append-to-register and M-x prepend-to-register.
1741 * Changes in Specialized Modes and Packages in Emacs 24.3
1743 ** Common Lisp emulation (CL)
1745 *** CL's main entry is now (require 'cl-lib).
1746 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1747 i.e., all its definitions have the "cl-" prefix (and internal definitions
1748 use the "cl--" prefix).
1750 If `cl' provided a feature under the name `foo', then `cl-lib'
1751 provides it under the name `cl-foo' instead; with the exceptions of the
1752 few `cl' definitions that had to use `foo*' to avoid conflicts with
1753 pre-existing Elisp entities. These have been renamed to `cl-foo'
1754 rather than `cl-foo*'.
1756 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1757 provide the old, non-prefixed names. Some exceptions are listed below:
1759 *** `cl-flet' is not like `flet' (which is deprecated).
1760 Instead it obeys the behavior of Common-Lisp's `flet'.
1761 In particular, in cl-flet function definitions are lexically scoped,
1762 whereas in flet the scoping is dynamic.
1764 *** `cl-labels' is slightly different from `labels'.
1765 The difference is that it relies on the `lexical-binding' machinery
1766 (as opposed to the `lexical-let' machinery used previously) to capture
1767 definitions in closures, so such closures will only work if `lexical-binding'
1770 *** `cl-letf' is not exactly like `letf'.
1771 The only difference is in details that relate to some deprecated usage
1772 of `symbol-function' in place forms.
1774 *** `progv' was rewritten to use the `let' machinery.
1775 A side effect is that variables without corresponding values are bound
1776 to nil rather than being made unbound.
1778 *** The following methods of extending `setf' are obsolete
1779 (use features from gv.el instead):
1780 `define-modify-macro' (use `gv-letplace')
1781 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1782 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1783 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1787 *** Changes are now highlighted using the same color scheme as in
1788 modern VCSes. Deletions are displayed in red (new faces
1789 `diff-refine-removed' and `smerge-refined-removed', and new definition
1790 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1791 and `smerge-refined-added', and new definition of `diff-added').
1793 *** The variable `diff-use-changed-face' defines whether to use the
1794 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1795 changes in context diffs.
1797 *** The new command `diff-delete-trailing-whitespace' removes trailing
1798 whitespace introduced by a diff.
1800 ** Ediff now uses the same color scheme as Diff mode.
1804 A new version of python.el, which provides several new features, including:
1805 per-buffer shells, better indentation, Python 3 support, and improved
1806 shell-interaction compatible with iPython (and virtually any other
1809 *** Some user options have been replaced/renamed, including (old -> new):
1810 **** python-indent -> python-indent-offset
1811 **** python-guess-indent -> python-indent-guess-indent-offset
1812 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1813 **** python-use-skeletons -> python-skeleton-autoinsert
1815 *** Some user options have been removed, including:
1817 **** `python-indent-string-contents': Strings are never indented.
1819 **** `python-honour-comment-indentation':
1820 Comments are always considered as indentation markers.
1822 **** `python-continuation-offset': Indentation is automatically
1823 calculated in a pep8 compliant way depending on the context.
1825 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1826 Have no direct mapping as the shell interaction is completely different.
1828 **** `python-python-command', `python-jython-command':
1829 Replaced by `python-shell-interpreter'.
1831 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1832 `python-pdbtrack-minor-mode-string', `python-source-modes':
1835 *** Some commands have been replaced (old -> new):
1836 **** python-insert-class -> python-skeleton-class
1837 **** python-insert-def -> python-skeleton-def
1838 **** python-insert-for -> python-skeleton-for
1839 **** python-insert-if -> python-skeleton-if
1840 **** python-insert-try/except -> python-skeleton-try
1841 **** python-insert-try/finally -> python-skeleton-try
1842 **** python-insert-while -> python-skeleton-while
1843 **** python-find-function -> python-nav-jump-to-defun
1844 **** python-next-statement -> python-nav-forward-sentence
1845 **** python-previous-statement -> python-nav-backward-sentence
1846 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1847 **** python-end-of-defun-function -> python-nav-end-of-defun
1848 **** python-send-buffer -> python-shell-send-buffer
1849 **** python-send-defun -> python-shell-send-defun
1850 **** python-send-region -> python-shell-send-region
1851 **** python-send-region-and-go -> emulate with python-shell-send-region
1852 and python-shell-switch-to-shell
1853 **** python-send-string -> python-shell-send-string
1854 **** python-switch-to-python -> python-shell-switch-to-shell
1855 **** python-describe-symbol -> python-eldoc-at-point
1859 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1861 *** The D-Bus object manager interface is implemented.
1863 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1864 if their value does not fit into Emacs's integer range.
1866 *** The function `dbus-call-method' is now non-blocking.
1867 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1869 *** Signals can also be sent as unicast messages.
1871 *** The argument list of `dbus-register-signal' has been extended,
1872 according to the new match rule types of D-Bus.
1874 *** `dbus-init-bus' supports private connections.
1876 *** There is a new function `dbus-setenv'.
1878 ** `desktop-path' no longer includes the "." directory.
1879 Desktop files are now located in ~/.emacs.d by default.
1883 *** `dired-do-async-shell-command' executes each file sequentially
1884 if the command ends in `;' (when operating on multiple files).
1885 Otherwise, it executes the command on each file in parallel.
1887 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1888 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1891 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1892 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1893 mark/unmark/flag all files in the active region.
1895 *** The minibuffer default for `=' (`dired-diff') has changed.
1896 It is now the backup file for the file at point, if one exists.
1897 In Transient Mark mode the default is the file at the active mark.
1899 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1900 The global binding for `M-=', `count-words-region' is in effect.
1904 *** New module "notifications", which can send a notification when you
1905 receive a private message or your nickname is mentioned.
1907 *** ERC will look up server/channel names via auth-source and use any
1910 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1911 only applies to messages sent by lurkers.
1913 ** reStructuredText mode
1915 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1916 fontification, comment handling, and customization have all been revised
1919 *** Support for `imenu' and `which-function-mode'.
1921 *** The reStructuredText syntax is more closely covered.
1922 Sphinx support has been improved.
1924 *** `rst-insert-list' inserts new list or continues existing lists.
1926 *** A negative prefix argument always works for `rst-adjust'.
1928 *** The window configuration is reset after displaying a TOC.
1930 *** The constant `rst-version' describes the rst.el package version.
1934 *** Support for percent literals and recognition of regular expressions
1935 in method calls without parentheses with more methods, including Cucumber
1938 *** Improved syntax highlighting and indentation.
1940 *** New command `ruby-toggle-block', bound to `C-c {'.
1942 *** Some non-standard keybindings/commands have been removed:
1944 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1946 **** `ruby-mark-defun'; use `mark-defun'.
1948 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1949 appropriate settings for the variables `beginning-of-defun-function'
1950 and `end-of-defun-function'.
1952 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1953 `reindent-then-newline-and-indent' and `newline' have been removed.
1955 ** Shell Script mode
1957 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1959 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1961 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1965 *** The free software compiler GHDL is supported (and now the default).
1967 *** Support for the VHDL-AMS packages has been added/updated.
1969 *** Updated to the 2002 revision of the VHDL standard.
1971 *** Accepts \r and \f as whitespace.
1975 *** The faces used by Apropos are now directly customizable.
1976 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1977 see the `apropos' Custom group for details.
1979 *** The old options whose values specified faces to use have been removed
1980 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1981 `apropos-match-face' and `apropos-property-face'.).
1985 *** This package has been rewritten to use Tabulated List mode.
1987 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1988 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1992 *** Algebraic simplification mode is now the default.
1993 To restrict to the limited simplifications given by the former
1994 default simplification mode, use `m I'.
1998 *** You can customize the header text that appears above each calendar month.
1999 See the variable `calendar-month-header'.
2001 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2003 *** The calendars produced by cal-html include holidays.
2004 Customize `cal-html-holidays' to change this.
2008 *** The major modes from the parser generators "Bovine" and "Wisent"
2009 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2010 are in `auto-mode-alist', and the corresponding manuals are included.
2014 **** Menu support for the "Configuration" feature. This allows users to
2015 choose the active configuration (such as debug or install) from the menu.
2017 **** New command `ede-set' to interactively set project-local variables.
2019 **** Support for compiling, debugging, and running in "generic" projects.
2021 **** Autoconf editing support for M4 macros with complex arguments.
2023 **** Compilation support for the "linux" project type.
2025 **** "simple" projects have been removed; use "generic" projects instead.
2029 **** Support for parsing #include statements inside a namespace in C/C++.
2031 **** Improved support for 'extern "C"' declarations in C/C++.
2033 **** The ability to ignore more common special C/C++ preprocessor symbols,
2034 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2035 If available, include cdefs.h as an additional source of preprocessor symbols.
2037 **** Improved C/C++ function pointer parsing.
2039 **** In Python, support for converting imports to include file names.
2041 **** Ability to dynamically determine the Python load path.
2043 **** Support for the Python 'WITH' and 'AT' keywords.
2045 **** Improved tooltip completion.
2049 **** The SRecode manual is now included.
2051 **** Tag generation supports constructor/destructor settings and system
2052 include differentiation.
2054 **** Addition of 'Framework' support: Frameworks are specified when a
2055 particular kind of library (such as Android) is needed in a common language
2058 **** Support for nested templates and let variables override based on priority.
2060 **** Support for merging tables from multiple related modes, such as
2061 default -> c++ -> arduino.
2063 ** Compile has a new option `compilation-always-kill'.
2067 *** `custom-reset-button-menu' now defaults to t.
2069 *** Non-option variables are never matched in `customize-apropos' and
2070 `customize-apropos-options' (i.e., the prefix argument does nothing for
2071 these commands now).
2075 *** The variables `term-default-fg-color' and `term-default-bg-color'
2076 are now deprecated in favor of the customizable face `term'.
2078 *** You can customize how to display ANSI terminal colors and styles
2079 by customizing the corresponding `term-color-<COLOR>',
2080 `term-color-underline' and `term-color-bold' faces.
2084 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2086 *** Remote processes are now also supported on remote MS-Windows hosts.
2090 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2091 Previously, this slot stored semicolon-separated attribute-value pairs
2092 appended to some imap URLs, but this is not compatible with RFC 3986.
2093 So now the `filename' slot stores the entire path and query components,
2094 and the `attributes' slot is always nil.
2096 *** New function `url-encode-url' for encoding a URI string.
2097 The `url-retrieve' function now uses this to encode its URL argument,
2098 in case that is not properly encoded.
2100 ** notifications.el supports now version 1.2 of the Notifications API.
2101 The function `notifications-get-capabilities' returns the supported
2104 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2105 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2106 `flymake-warning-bitmap'.
2108 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2109 specifying URL types that should be converted to remote file names at
2110 the FFAP prompt. The default is now '("ftp").
2112 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2113 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2115 ** New option `mouse-avoidance-banish-position' specifies where the
2116 `banish' mouse avoidance setting moves the mouse.
2118 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2119 closing brackets to be aligned with the line of the opening bracket.
2121 ** In Proced mode, new command `proced-renice' renices marked processes.
2123 ** New option `async-shell-command-buffer' specifies the buffer to use
2124 for a new asynchronous `shell-command' when the default output buffer
2125 `*Async Shell Command*' is already in use.
2127 ** SQL mode has a new option `sql-db2-escape-newlines'.
2128 If non-nil, newlines sent to the command interpreter will be escaped
2129 by a backslash. The default does not escape the newlines and assumes
2130 that the sql statement will be terminated by a semicolon.
2132 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2133 (and modes that derive from it), sorts the column at point, or the Nth
2134 column if a numeric prefix argument is given.
2136 ** `which-func-modes' now defaults to t, so Which Function mode, when
2137 enabled, applies to all applicable major modes.
2139 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2142 ** Follow mode no longer works by using advice.
2143 The option `follow-intercept-processes' has been removed.
2145 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2147 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2148 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2149 *** semantic-change-hooks -> semantic-change-functions
2150 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2151 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2152 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2153 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2154 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2155 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2156 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2157 *** rcirc-activity-hooks -> rcirc-activity-functions
2158 *** rcirc-print-hooks -> rcirc-print-functions
2159 *** dbus-event-error-hooks -> dbus-event-error-functions
2160 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2161 *** checkdoc-style-hooks -> checkdoc-style-functions
2162 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2163 *** archive-extract-hooks -> archive-extract-hook
2164 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2165 *** hfy-post-html-hooks -> hfy-post-html-hook
2166 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2167 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2168 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2169 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2171 ** Obsolete packages
2174 In most cases, assoc+member+push+delq work just as well.
2175 And in any case it's just a terrible package: ugly semantics, terrible
2176 inefficiency, and not namespace-clean.
2185 * Incompatible Lisp Changes in Emacs 24.3
2187 ** Docstrings starting with `*' no longer indicate user options.
2188 Only variables defined using `defcustom' are considered user options.
2189 The function `user-variable-p' is now an obsolete alias for
2190 `custom-variable-p'.
2192 ** The return values of `defalias', `defun' and `defmacro' have changed,
2193 and are now undefined. For backwards compatibility, `defun' and
2194 `defmacro' currently return the name of the newly defined
2195 function/macro, but this should not be relied upon.
2197 ** `random' by default now returns a different random sequence in
2198 every Emacs run. Use `(random S)', where S is a string, to set the
2199 random seed to a value based on S, in order to get a repeatable
2200 sequence in later calls.
2202 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2203 that substring is inserted literally even if the LITERAL arg is
2204 non-nil, instead of causing an error to be signaled.
2206 ** `select-window' now always makes the window's buffer current.
2207 It does so even if the window was selected before.
2209 ** The function `x-select-font' can return a font spec, instead of a
2210 font name as a string. Whether it returns a font spec or a font name
2211 depends on the graphical library.
2213 ** `face-spec-set' no longer sets frame-specific attributes when the
2214 third argument is a frame (that usage was obsolete since Emacs 22.2).
2216 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2218 ** The CL package's `get-setf-method' function no longer exists.
2219 Generalized variables are now part of core Emacs Lisp, and implemented
2220 differently to the way cl.el used to do it. It is not possible to
2221 define a compatible replacement for `get-setf-method'. See the file
2222 gv.el for internal details of the new implementation.
2224 ** The arguments of `dbus-register-signal' are no longer just strings,
2225 but keywords or keyword-string pairs. The old argument list will
2226 still be supported for Emacs 24.x.
2228 ** Miscellaneous name changes
2229 Some Lisp symbols have been renamed to correct their spelling,
2230 or to be more consistent with standard Emacs terminology.
2232 *** Renamed functions
2233 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2234 **** inactivate-input-method -> deactivate-input-method
2235 **** quail-inactivate -> quail-deactivate
2236 **** robin-inactivate -> robin-deactivate
2237 **** viper-inactivate-input-method -> viper-deactivate-input-method
2238 **** viper-inactivate-input-method-action ->
2239 viper-deactivate-input-method-action
2240 **** ucs-input-inactivate -> ucs-input-deactivate
2243 The old hooks are still supported for backward compatibility, but they
2244 are deprecated and will be removed eventually.
2245 **** input-method-inactivate-hook -> input-method-deactivate-hook
2246 **** robin-inactivate-hook -> robin-deactivate-hook
2247 **** quail-inactivate-hook -> quail-deactivate-hook
2249 *** Renamed variables
2250 **** follow-deactive-menu -> follow-inactive-menu
2251 **** inactivate-current-input-method-function ->
2252 deactivate-current-input-method-function
2254 ** Some obsolete functions, variables, and faces have been removed:
2255 *** `last-input-char', `last-command-char', `unread-command-char'
2256 *** `facemenu-unlisted-faces'
2257 *** `rmail-decode-mime-charset'
2258 *** `iswitchb-read-buffer'
2259 *** `sc-version', `sc-submit-bug-report'
2260 *** `set-char-table-default'
2261 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2262 *** `compile-internal'
2264 *** `mode-line-inverse-video'
2265 *** `follow-mode-off-hook'
2266 *** `cvs-commit-buffer-require-final-newline'
2267 (use `log-edit-require-final-newline' instead)
2268 *** `cvs-changelog-full-paragraphs'
2269 (use `log-edit-changelog-full-paragraphs' instead)
2270 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2271 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2272 *** `vc-master-templates' (use `vc-handled-backends' instead)
2273 *** `vc-checkout-carefully'
2276 * Lisp Changes in Emacs 24.3
2278 ** CL-style generalized variables are now in core Elisp.
2279 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2280 You can define your own generalized variables using `gv-define-simple-setter',
2281 `gv-define-setter', etc.
2283 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2284 This can significantly speed up execution of non-byte-compiled code,
2285 but can also bump into previously unnoticed cyclic dependencies.
2286 These are generally harmless: they will simply cause the macro calls
2287 to be left for later expansion (as before), but will result in a
2288 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2289 You may wish to restructure your code so this does not happen.
2291 ** New sampling-based Elisp profiler.
2292 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2293 When finished, use M-x profiler-stop. The sampling rate can be based on
2294 CPU time or memory allocations.
2296 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2297 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2299 ** New macros `setq-local' and `defvar-local'.
2301 ** Face underlining can now use a wave.
2303 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2304 of `read-regexp' accepts a string ending with a colon and space, and its
2305 second argument DEFAULTS can be a list of strings accessible via `M-n'
2306 in the minibuffer ahead of other hard-coded useful regexp-related values.
2307 More commands use `read-regexp' now to read their regexp arguments.
2311 *** New function `completion-table-with-quoting' to handle completion
2312 in the presence of quoting, such as file completion in shell buffers.
2314 *** New function `completion-table-subvert' to use an existing completion
2315 table, but with a different prefix.
2319 *** New error type and new function `user-error'.
2320 These do not trigger the debugger.
2322 *** New option `debugger-bury-or-kill', saying what to do with the
2323 debugger buffer when exiting debug.
2325 *** Set `debug-on-message' to enter the debugger when a certain
2326 message is displayed in the echo area. This can be useful when trying
2327 to work out which code is doing something.
2329 *** New var `inhibit-debugger', automatically set to prevent accidental
2330 recursive invocations.
2334 *** New command `fit-frame-to-buffer' adjusts the frame height to
2337 *** The command `fit-window-to-buffer' can adjust the frame height
2338 if the new option `fit-frame-to-buffer' is non-nil.
2340 *** New macro `with-temp-buffer-window', similar to
2341 `with-output-to-temp-buffer'.
2343 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2346 *** New option `switch-to-buffer-preserve-window-point' to restore a
2347 window's point when switching buffers.
2349 *** New display action alist entries `window-height' and `window-width'
2350 specify the size of new windows created by `display-buffer'.
2352 *** New display action alist entry `pop-up-frame-parameters', if
2353 non-nil, specifies frame parameters to give any newly-created frame.
2355 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2356 tells display action functions to avoid changing which frame is
2359 *** New display action alist entry `previous-window', if non-nil,
2360 specifies window to reuse in `display-buffer-in-previous-window'.
2362 *** New display action functions `display-buffer-below-selected',
2363 and `display-buffer-in-previous-window'.
2365 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2366 now accept a third argument to avoid choosing the selected window.
2368 *** Additional values recognized for option `window-combination-limit'.
2370 *** The following variables are obsolete, as they can be replaced by
2371 appropriate entries in the `display-buffer-alist' function introduced
2373 **** `dired-shrink-to-fit'
2374 **** `display-buffer-reuse-frames'
2375 **** `display-buffer-function'
2376 **** `special-display-buffer-names'
2377 **** `special-display-frame-alist'
2378 **** `special-display-function'
2379 **** `special-display-regexps'
2383 *** `current-time-string' no longer requires that its argument's year
2384 must be in the range 1000..9999. It now works with any year supported
2385 by the underlying C implementation.
2387 *** `current-time' now returns extended-format time stamps
2388 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2389 PSEC is typically a multiple of 1000 on current machines. Other
2390 functions that use this format, such as `file-attributes' and
2391 `format-time-string', have been changed accordingly. Old-format time
2392 stamps are still accepted.
2394 *** The format of timers in `timer-list' and `timer-idle-list' is now
2395 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2396 The PSECS slot is new, and uses picosecond resolution. It can be
2397 accessed via the new `timer--psecs' accessor.
2399 *** Last-modified time stamps in undo lists now are of the form
2400 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2404 *** Improved security when handling persistent objects:
2406 **** `eieio-persistent-read' now features optional arguments for specifying
2407 the class to load, as well as a flag stating whether subclasses are allowed;
2408 if provided, other classes will be rejected by the reader. For
2409 compatibility with existing code, if the class is omitted only a
2412 **** New specialized reader for pulling in classes and signaling errors
2413 without evaluation of suspicious code.
2415 **** All slots that contain objects must have a :type. Slots with lists
2416 of objects must use a new type predicate for a list of an object type.
2418 *** Support for `find-function' and similar utilities, through the addition
2419 of filename support to generated symbols.
2421 ** Floating point functions now always return special values like NaN,
2422 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2423 Previously, they returned NaNs on some platforms but signaled errors
2424 on others. The affected functions are acos, asin, tan, exp, expt,
2425 log, log10, sqrt, and mod.
2427 ** New fringe bitmap `exclamation-mark'.
2429 ** Miscellaneous changes to special forms and macros
2431 *** `defun' and `defmacro' are now macros rather than special forms.
2433 *** `kbd' is now a function rather than a macro.
2435 ** Miscellaneous new functions
2437 *** `set-temporary-overlay-map' sets up a temporary keymap that
2438 takes precedence over most other maps for a short while (normally one key).
2440 *** `autoloadp' tests if its argument is an autoloaded object.
2442 *** `autoload-do-load' performs the autoloading operation.
2444 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2446 *** `file-name-base' returns a file name sans directory and extension.
2448 *** `function-get' fetches a function property, following aliases.
2450 *** `posnp' tests if an object is a `posn'.
2452 *** `system-users' returns the user names on the system.
2454 *** `system-groups' returns the group names on the system.
2456 *** `tty-top-frame' returns the topmost frame of a text terminal.
2458 ** The following functions and variables are obsolete:
2459 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2460 *** `buffer-has-markers-at'
2461 *** `macro-declaration-function' (use `macro-declarations-alist')
2462 *** `window-system-version' (provides no useful information)
2463 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2464 *** `query-replace-interactive'
2465 *** `font-list-limit' (has had no effect since Emacs < 23)
2468 * Changes in Emacs 24.3 on Non-Free Operating Systems
2470 ** Cygwin builds can use the native MS Windows user interface.
2471 Pass `--with-w32' to configure. The default remains the X11 interface.
2473 ** Two new functions are available in Cygwin builds:
2474 `cygwin-convert-file-name-from-windows' and
2475 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2476 code to access the Cygwin file-name mapping machinery to convert
2477 between Cygwin and Windows-native file and directory names.
2479 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2480 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2481 `mouse-autoselect-window'.
2483 ** On MS Windows Vista and later Emacs now supports symbolic links.
2485 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2486 support for libxml2, even if its presence is detected.
2488 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2490 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2491 directories to the search path. You must add them yourself if you want them.
2494 * Changes in Emacs 24.2
2496 ** This is mainly a bug-fix release.
2499 * Installation Changes in Emacs 24.1
2501 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2502 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2503 also depend on Gtk+. You can disable them with --without-rsvg and
2506 ** Emacs can be compiled with GnuTLS support.
2507 This happens by default if a suitably recent version of the library is
2508 found at build time. To prevent this, use the configure option
2509 `--without-gnutls'. See below for GnuTLS features.
2511 ** Emacs can be compiled with SELinux support.
2512 This happens by default if a suitably recent version of the library is
2513 found at build time. To prevent this, use the configure option
2514 `--without-selinux'. See below for SELinux features.
2516 ** Emacs can be compiled with ImageMagick support.
2517 This happens by default if a suitably recent version of the library is
2518 found at build time. To prevent this, use the configure option
2519 `--without-imagemagick'. See below for ImageMagick features.
2520 This feature is not available for the Nextstep or MS ports.
2522 ** Emacs can be compiled with libxml2 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-xml2'. See below for libxml2 features.
2527 ** By default, the installed Info and man pages are compressed.
2528 You can disable this by configuring --without-compress-info.
2530 ** New configure option --with-wide-int.
2531 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2532 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2535 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2536 These provide no new functionality, they just remove the need to edit
2537 lib-src/Makefile by hand in order to use the associated features.
2539 ** New configure option --enable-use-lisp-union-type.
2540 This is only useful for Emacs developers to debug certain types of bugs.
2541 This is not a new feature; only the configure flag is new.
2543 ** The standalone programs digest-doc and sorted-doc are removed.
2544 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2546 ** The standalone program `fakemail' is removed.
2547 If you need it, feedmail.el provides a superset of the functionality.
2550 * Startup Changes in Emacs 24.1
2552 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2553 command line arguments, and the EMACS_UNIBYTE environment variable, no
2554 longer have any effect. (They were declared obsolete in Emacs 23.)
2556 ** New command line option `--no-site-lisp' removes site-lisp directories
2557 from load-path. -Q now implies this. This option does not affect the
2558 EMACSLOADPATH environment variable (and hence has no effect for
2562 * Changes in Emacs 24.1
2566 *** Many packages now use the `completion-at-point' command,
2567 rather than implementing separate completion commands.
2569 *** `completion-at-point' now handles tags and semantic completion.
2571 *** Completion in a non-minibuffer now tries to detect the end of completion
2572 and pops down the *Completions* buffer accordingly.
2574 *** New option `completion-cycle-threshold' allows completion cycling.
2576 *** New option `completion-category-overrides' for overriding the
2577 default completion style in certain circumstances.
2579 *** New completion style `substring'.
2581 *** Completion of buffer names uses `substring' completion by default.
2583 *** The option `widget-complete-field' has been removed.
2587 *** The first time you try sending mail, Emacs asks for a mail method.
2588 This is implemented by a new default for `send-mail-function', which
2589 is `sendmail-query-once'. This offers to use the smtpmail package, or
2590 to use the old defaults relying on external mail facilities
2591 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2592 `mailclient-send-it' on Windows).
2594 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2595 transfers the report to your desktop's preferred mail client, if there
2596 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2599 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2600 and Mail mode changes
2602 ** Emacs server and client changes
2604 *** New option `server-port' specifies the port for TCP Emacs servers.
2606 *** New emacsclient argument -q/--quiet suppresses some status messages.
2608 *** New emacsclient argument --frame-parameters specifies the frame
2609 parameters of any newly-created graphical frame.
2611 *** If emacsclient shuts down due to Emacs signaling an error,
2612 its exit status is 1.
2614 *** New emacsclient argument --parent-id ID.
2615 This opens a client frame in parent X window ID, via XEmbed, similar
2616 to the --parent-id argument to Emacs.
2618 ** Internationalization changes
2620 *** Emacs now supports display and editing of bidirectional text.
2621 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2622 displayed in the correct visual order as expected by users of those
2623 scripts. The display reordering is a "full bidirectionality" class
2624 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2625 with no RTL text should look exactly the same as before.
2627 **** New buffer-local variable `bidi-display-reordering'.
2628 To disable display reordering in a buffer, change this to nil.
2630 **** New buffer-local variable `bidi-paragraph-direction'.
2631 If nil (the default), Emacs determines the base direction of each
2632 paragraph from its text, as specified by the UBA. Setting the value
2633 to `right-to-left' or `left-to-right' forces a base direction on each
2636 Paragraphs with right-to-left base direction are displayed starting at
2637 the right window edge.
2639 *** Enhanced support for characters with no glyphs in available fonts,
2640 or, on text terminals, characters that cannot be encoded by the
2641 terminal coding system. The new option `glyphless-char-display-control'
2642 specifies how to display them: as a hexadecimal code in a box, a thin
2643 1-pixel space, an empty box, etc.
2645 *** New input methods for Farsi and Bulgarian
2646 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2648 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2649 (U+2010 and U+2011).
2651 *** New Hebrew translation of the Emacs Tutorial.
2652 Type `C-u C-h t' to choose it in case your language setup doesn't
2653 automatically select it.
2655 ** An Emacs Lisp package manager is now included.
2656 This is a convenient way to download and install additional packages,
2657 from a package repository at http://elpa.gnu.org.
2659 *** M-x list-packages shows a list of packages, which can be
2660 selected for installation.
2662 *** New command `describe-package', bound to `C-h P'.
2664 *** By default, all installed packages are loaded automatically when
2665 Emacs starts up. To disable this, set `package-enable-at-startup' to
2666 nil. To specify the packages to load, customize `package-load-list'.
2668 ** Custom theme changes
2670 *** New command `M-x customize-themes', which provides a convenient
2671 interface for enabling and disabling Custom themes.
2673 *** New option `custom-theme-load-path' is the load path for themes.
2674 Emacs no longer looks for Custom themes in `load-path'. The default
2675 value of `custom-theme-load-path' says to look for themes in
2676 `custom-theme-directory', followed by a subdirectory of
2677 `data-directory' named "themes/", which contains a small selection of
2678 built-in Custom themes.
2680 *** New option `custom-safe-themes' records known-safe theme files.
2681 If a theme is not in this list, Emacs queries before loading it, and
2682 offers to save the theme to `custom-safe-themes' automatically. By
2683 default, all themes included in Emacs are treated as safe.
2685 ** Improved GTK integration
2687 *** GTK scroll-bars are now placed on the right by default.
2688 The function `set-scroll-bar-mode' can change this.
2690 *** GTK tool bars can have just text, just images or images and text.
2691 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2692 the default is taken from desktop settings.
2694 *** GTK tool bars can be placed on any edge of the frame.
2695 The frame-parameter tool-bar-position controls this. It takes the
2696 values top, left, right or bottom. The Options => Show/Hide menu has
2699 *** The default colors for selected text (the `region' face) are taken
2700 from the GTK theme when Emacs is built with GTK.
2702 *** Emacs uses GTK tooltips by default if built with GTK.
2703 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2705 ** Graphical interface changes
2707 *** On graphical displays, the mode-line no longer ends in dashes.
2708 Also, the first dash (which does not indicate anything) is just
2709 displayed as a space.
2711 *** `menu-bar-select-buffer-function' lets you choose another operation
2712 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2714 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2715 built with Xft. These fonts can be set via X resources, for example:
2716 Emacs.pane.menubar.font: Courier-12
2720 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2721 or if it receives a SIGINT signal in batch mode.
2723 *** `kill-emacs-hook' is now also run in batch mode.
2724 Third-party code which adds to `kill-emacs-hook' should check if they
2725 do the right thing in batch mode.
2727 ** Scrolling changes
2729 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2730 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2731 of buffer at first key-press (instead they move to top/bottom of buffer)
2732 when `scroll-error-top-bottom' is non-nil.
2734 *** New option `scroll-error-top-bottom' (see above).
2736 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2737 scroll a line instead of full screen.
2739 *** New property `scroll-command' should be set on a command's symbol to
2740 define it as a scroll command affected by `scroll-preserve-screen-position'.
2742 *** If you customize `scroll-conservatively' to a value greater than 100,
2743 Emacs will never recenter point in the window when it scrolls due to
2744 cursor motion commands or commands that move point (e.f., `M-g M-g').
2745 Previously, you needed to use `most-positive-fixnum' as the value of
2746 `scroll-conservatively' to achieve the same effect.
2748 *** "Aggressive" scrolling now honors the scroll margins.
2749 If you customize `scroll-up-aggressively' or
2750 `scroll-down-aggressively' and move point off the window, Emacs now
2751 scrolls the window so as to avoid positioning point inside the scroll
2754 ** Basic SELinux support has been added.
2755 This requires Emacs to be linked with libselinux at build time.
2757 *** Emacs preserves the SELinux file context when backing up.
2758 Also, the function `copy-file' has an extra optional argument for
2759 preserving SELinux context, and the return value of `backup-buffer'
2760 now includes the SELinux context.
2762 *** New functions `file-selinux-context' and `set-file-selinux-context'
2763 get and set the SELinux context of a file.
2767 *** `delete-by-moving-to-trash' now only affects commands that specify
2768 trashing. This avoids inadvertently trashing temporary files.
2770 *** Calling `delete-file' or `delete-directory' with a prefix argument
2771 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2773 ** File- and directory-local variable changes
2775 *** You can stop directory local vars from applying to subdirectories.
2776 Add an element (subdirs . nil) to the alist portion of any variables
2777 settings to indicate that the section should not apply to
2780 *** Directory local variables can apply to some file-less buffers.
2781 Affected modes include dired, vc-dir, and log-edit. For example,
2782 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2783 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2784 `hack-dir-local-variables-non-file-buffer' to support this.
2786 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2787 Instead, use "eval: (minor-mode 1)".
2789 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2790 to `inhibit-local-variables-regexps'. As the name suggests, it now
2791 applies to ALL file local variables, not just -*- lines. The
2792 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2797 *** The `quit-window' command now restores the last buffer displayed
2798 in the quitted window.
2800 *** Resizing an Emacs frame now preserves proportional window sizes,
2801 modulo restrictions like window minimum sizes and fixed-size windows.
2803 *** The behavior of `display-buffer' is now customizable in detail.
2805 **** New option `display-buffer-base-action' specifies a list of
2806 user-determined display "actions" (functions and optional arguments
2807 for choosing the displaying window).
2809 This takes precedence over the default display action, which is
2810 specified by `display-buffer-fallback-action'.
2812 **** New option `display-buffer-alist' maps buffer name regexps to
2813 display actions, taking precedence over `display-buffer-base-action'.
2815 *** New option `window-combination-limit'.
2816 The new option `window-combination-limit' allows to return the space
2817 obtained for resizing or creating a window more reliably to the window
2818 from which such space was obtained.
2820 *** New option `window-combination-resize'.
2821 The new option `window-combination-resize' allows to split a window that
2822 otherwise cannot be split because it's too small by stealing space from
2823 other windows in the same combination. Subsequent resizing or deletion
2824 of the window will resize all windows in the same combination as well.
2826 *** New option `frame-auto-hide-function' lets you choose between
2827 iconifying or deleting a frame when burying a buffer in a dedicated
2828 frame, or quitting a window showing a buffer in a frame of its own.
2830 *** New commands `maximize-window' and `minimize-window'.
2831 These maximize and minimize the size of a window within its frame.
2833 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2834 These functions allow to navigate through the live buffers that have
2835 been shown in a specific window.
2837 ** Minibuffer changes
2839 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2840 This is handy for minibuffer-only frames, and is also used for the feature
2841 where mouse-1 pops up *Messages*"', which can now easily be changed.
2843 *** Minibuffers set `truncate-lines' to nil.
2844 If you want to change the value to something else, you could use
2845 for example `minibuffer-setup-hook'.
2847 ** `auto-mode-case-fold' is now enabled by default.
2849 ** `backup-by-copying-when-mismatch' now defaults to t.
2851 ** New basic faces `error', `warning', `success'.
2852 These are used to highlight text indicating failure, caution or
2853 successful operation.
2855 ** New option `list-colors-sort' defines the color sort order
2856 for `list-colors-display'.
2858 ** The variable `focus-follows-mouse' now always defaults to nil.
2861 * Editing Changes in Emacs 24.1
2865 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2866 `isearch-yank-line'.
2868 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2869 `isearch-yank-kill'.
2871 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2873 ** New commands `count-words-region' and `count-words'.
2875 *** M-= is bound to `count-words-region', not `count-lines-region'.
2876 The `count-words-region' command, when called interactively, reports
2877 the number of lines, words, and characters in the region. It is a
2878 superset of the old `count-lines-region', which is now an obsolete
2881 ** The command `just-one-space' (M-SPC), if given a negative argument,
2882 also deletes newlines around point.
2886 *** New option `delete-active-region'.
2887 If non-nil, [delete] and DEL delete the region if it is active and no
2888 prefix argument is given. If set to `kill', those commands kill
2891 *** New command `delete-forward-char', bound to [delete].
2892 This is meant for interactive use, and obeys `delete-active-region'.
2893 The command `delete-char' does not obey `delete-active-region'.
2895 *** `delete-backward-char' is now a Lisp function.
2896 Apart from obeying `delete-active-region', its behavior is unchanged.
2897 However, the byte compiler now warns if it is called from Lisp; Lisp
2898 callers should use delete-char with a negative argument instead.
2900 *** The option `mouse-region-delete-keys' has been deleted.
2902 ** Selection changes.
2904 The default handling of clipboard and primary selections has been
2905 changed to conform with modern X applications. In short, most
2906 commands for killing and yanking text now use the clipboard, while
2907 mouse commands use the primary selection.
2909 In the following, we provide a list of these changes, followed by a
2910 list of steps to get the old behavior back if you prefer that.
2912 *** `select-active-regions' now defaults to t.
2913 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2914 the kill ring. The selected text is put in the primary selection, if
2915 the system possesses a separate primary selection facility (e.g. X).
2917 **** `select-active-regions' also accepts a new value, `only'.
2918 This means to only set the primary selection for temporarily active
2919 regions (usually made by mouse-dragging or shift-selection);
2920 "ordinary" active regions, such as those made with C-SPC followed by
2921 point motion, do not alter the primary selection.
2923 **** `mouse-drag-copy-region' now defaults to nil.
2925 *** mouse-2 is now bound to `mouse-yank-primary'.
2926 This pastes from the primary selection, ignoring the kill-ring.
2927 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2929 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2931 *** `x-select-enable-primary' now defaults to nil.
2932 Thus, commands that kill text or copy it to the kill-ring (such as
2933 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2935 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2936 exactly equivalent to M-w, C-w, and C-y respectively.
2938 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2939 non-nil by default, as Windows does not support the primary selection
2940 between applications.
2942 *** To return to the previous behavior, do the following:
2944 **** Change `select-active-regions' to nil.
2945 **** Change `mouse-drag-copy-region' to t.
2946 **** Change `x-select-enable-primary' to t (on X only).
2947 **** Change `x-select-enable-clipboard' to nil.
2948 **** Bind `mouse-yank-at-click' to mouse-2.
2950 *** Support for X cut buffers has been removed.
2952 *** X clipboard managers are now supported.
2953 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2955 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2956 in the current rectangle. With a prefix argument, this prompts for a
2957 number to count from and for a format string.
2959 ** `redisplay-dont-pause' now defaults to t.
2960 This makes Emacs feel more responsive to editing commands that arrive
2961 at high rate, e.g. if you lean on some key, because stopping redisplay
2962 in the middle (when this variable is nil) forces more expensive
2963 updates later on, and Emacs appears to be unable to keep up.
2965 ** The behavior of <TAB> for active regions in Text mode has changed.
2966 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2967 when the region is active causes Emacs to indent all the lines in the
2968 region, aligning them with the line previous to the first line in the
2969 region (or with the left margin if there is no previous line).
2971 ** When `occur' is called with a prefix argument, matching strings are
2972 collected into the `*Occur*' buffer without line numbers. If there
2973 are parenthesized subexpressions in the specified regexp, `occur'
2974 reads replacement text that may contain \\& and \\N whose convention
2975 follows `replace-match'.
2978 * Changes in Specialized Modes and Packages in Emacs 24.1
2980 ** Archive Mode has basic support for browsing and updating 7z archives.
2984 *** BibTeX mode now supports biblatex.
2985 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2986 `bibtex-entry-field-alist' is now an obsolete alias for
2987 `bibtex-BibTeX-entry-alist'.
2989 *** New command `bibtex-search-entries', bound to C-c C-a.
2991 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2993 *** New variable `bibtex-search-entry-globally'.
2997 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2999 *** The default browser used by the package is now the "xdg-open" program,
3000 on platforms that support it. This calls your desktop's preferred browser.
3004 *** Support for musical notes.
3006 *** Support for logarithmic units.
3008 *** No longer uses the tex prefix for TeX specific unit names when
3009 using TeX or LaTeX mode.
3011 *** New option to highlight selections using faces.
3013 *** `calc-histogram' has the option of using a vector to determine the bins.
3015 *** New "O" option prefix.
3017 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3019 ** Calendar, Diary, and Appt
3021 *** Diary entries can contain non-printing "comments".
3022 See the variable `diary-comment-start'.
3024 *** Appointments can specify their individual warning times.
3025 See the variable `appt-warning-time-regexp'.
3027 *** The function specified by `appt-disp-window-function' may be passed
3028 lists of arguments if multiple appointments are due at similar times.
3029 If you are using a custom function for this, you should update it.
3031 *** New function `diary-hebrew-birthday'.
3033 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3034 may no longer be nil, but must all be strings.
3036 *** The obsolete (since Emacs 22.1) method of enabling the appt
3037 package by adding `appt-make-list' to `diary-hook' has been removed.
3038 Use `appt-activate' instead.
3040 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3041 appt-issue-message (use the function appt-activate)
3042 appt-visible/appt-msg-window (use the variable appt-display-format)
3044 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3045 view-diary-entries, list-diary-entries, show-all-diary-entries
3049 *** New feature to "guess" the style in an existing buffer.
3050 The main entry point is M-x c-guess.
3052 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3054 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3055 Thus C-M-a will, by default, go to the beginning of the immediate function,
3058 *** "Macros with semicolons" can be registered for correct indentation.
3059 Where such a macro ends a line (no semicolon) the next statement is no longer
3060 parsed as a statement continuation.
3062 ** Comint and modes derived from it use the standard completion code.
3066 *** Compilation mode can be used without Font Lock mode.
3067 `compilation-parse-errors-function' is now obsolete.
3069 *** New variable `compilation-filter-start', which is bound while
3070 `compilation-filter-hook' runs. It records the start position of the
3071 text inserted by `compilation-filter'.
3073 *** `compilation-error-screen-columns' and `compilation-first-column'
3074 are obeyed in the editing buffer. So programming language modes can
3075 set them, whereas previously only the value in the *Compilation*
3080 *** Customize buffers now contain a search field.
3081 The search is performed using `customize-apropos'.
3082 To turn off the search field, set `custom-search-field' to nil.
3084 *** Options in customize group buffers start out hidden if not customized.
3085 Use the arrow to the left of the option name to toggle visibility.
3087 *** custom-buffer-sort-alphabetically now defaults to t.
3089 *** The color widget now has a "Choose" button, which allows you to
3090 choose a color via `list-colors-display'.
3094 *** It is now possible to access buses other than the default system
3097 *** The `dbus-register-method' and `dbus-register-property' functions
3098 optionally do not register names.
3100 *** The new function `dbus-register-service' registers a known service
3101 name on a D-Bus without also registering a property or a method.
3105 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3106 if called with a prefix argument, read a file name from the minibuffer
3107 instead of using the current buffer.
3109 *** The "dired local variables" feature of Dired-x is obsolete.
3110 The standard directory local variables feature replaces it.
3114 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3115 controlling attempts to autojoin a channel.
3117 *** New variable `erc-coding-system-precedence': If we use `undecided'
3118 as the server coding system, this variable will then be consulted.
3119 The default is to decode strings that can be decoded as utf-8 as
3120 utf-8, and do the normal `undecided' decoding for the rest.
3124 *** The default value of `eshell-directory-name' has changed
3125 to be an "eshell" directory in `user-emacs-directory'.
3126 The old "~/.eshell/" directory is still used if it exists, though.
3130 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3131 It now supports multithread non-stop debugging and simultaneous
3132 debugging of several threads.
3136 *** RET (`image-toggle-animation') toggles animation, if applicable.
3137 Animation plays once, unless the option `image-animate-loop' is non-nil.
3141 *** New command M-x info-display-manual displays a named Info manual.
3142 If that manual is already visited in some Info buffer, it displays
3143 that buffer. (This is handy if you have many manuals in many *info*
3144 buffers, and don't remember the name of the buffer visiting the manual
3145 you want to consult.) Otherwise, it loads and displays the manual.
3147 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3148 This is for compatibility with the stand-alone Info reader program,
3149 and also because `Info-edit' is a rarely used command that is disabled
3152 ** Mail mode changes (not Message mode)
3154 *** New command M-x mail-add-attachment for adding MIME attachments
3156 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3157 (Its name is misleading, since it has nothing to do with MIME
3158 attachments.) The old name is now an obsolete alias to the new name.
3160 ** MH-E has been updated to MH-E version 8.3.1.
3161 See MH-E-NEWS for details.
3163 ** Modula-2 mode provides auto-indentation.
3165 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3167 ** nXML mode no longer binds C-RET to `nxml-complete'.
3168 Completion is now performed via `completion-at-point', bound to C-M-i
3169 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3170 default), this performs tag completion.
3172 ** Org mode has been updated to version 7.8.09.
3173 See ORG-NEWS for details.
3175 ** Prolog mode has been completely revamped, with lots of additional
3176 functionality such as more intelligent indentation, electricity,
3177 support for more variants, including Mercury, and a lot more.
3181 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3182 in the Rmail incoming message.
3184 *** The variable `rmail-message-filter' no longer has any effect.
3185 This change was made in Emacs 23.1 but was not advertised at the time.
3186 Try using `rmail-show-message-hook' instead.
3190 *** M-x shell prompts for the shell path name if the default directory
3191 is a remote file name and neither the environment variable $ESHELL nor
3192 the variable `explicit-shell-file-name' is set.
3194 *** TAB is now bound to the standard `completion-at-point' command,
3195 which now implements the pcomplete rules for shell command completion.
3199 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3200 if the mail server supports them. This uses either built-in GnuTLS
3201 support, or the starttls.el library. Customize `smtpmail-stream-type'
3204 *** The variable `smtpmail-auth-credentials' has been removed.
3205 By default, the information is now stored in the file ~/.authinfo.
3206 This was the default value of smtpmail-auth-credentials. If you had
3207 customized smtpmail-auth-credentials to a list of user names and
3208 passwords, those settings are not used. During your first connection
3209 to the smtp server, Emacs will prompt for the user name and password,
3210 and offer to save them to ~/.authinfo. Or you can manually copy the
3211 credentials to ~/.authinfo. For example, if you had
3213 (setq smtpmail-auth-credentials
3214 '(("mail.example.org" 25 "jim" "s!cret")))
3216 then the equivalent line in ~/.authinfo would be
3218 machine mail.example.org port 25 login jim password s!cret
3220 See the auth-source manual for more information, e.g. on encrypting
3221 the credentials file.
3223 *** The variable `smtpmail-starttls-credentials' has been removed.
3224 If you had that set, you need to put
3226 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3228 in your ~/.authinfo file instead.
3230 *** SMTPmail defaults to using the address in the From: header as the
3231 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3232 to the address you wish to use instead.
3236 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3237 and `sql-oracle-scan-on'.
3239 *** New options controlling prompting for login parameters.
3240 Each supported product has a custom variable `sql-*-login-params',
3241 which is a list of the parameters to be prompted for before a
3242 connection is established.
3244 *** The command `sql-product-interactive' now takes a prefix argument,
3245 which causes it to prompt for an SQL product.
3247 *** Product-specific SQL interactive commands now take prefix arguments.
3248 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3249 given a prefix argument, prompt for a name for the SQL interactive
3250 buffer. This reduces the need for calling `sql-rename-buffer'.
3252 *** SQL interactive modes suppress command continuation prompts, and
3253 replace tabs with spaces. The first change impacts multiple line SQL
3254 statements entered with C-j between each line, statements yanked into
3255 the buffer and statements sent with `sql-send-*' functions. The
3256 second prevents the MySQL and Postgres interpreters from listing
3257 object name completions when sent text via `sql-send-*' functions.
3259 *** New command `sql-connect' starts a predefined SQLi session,
3260 using the login parameters from `sql-connection-alist'.
3262 *** New "Save Connection" menu item in SQLi buffers.
3263 This gathers the login params specified for the SQLi session, if it
3264 was not started by a connection, and saves them as a new connection.
3266 *** New commands for listing database objects and details:
3267 sql-list-all and sql-list-table.
3269 *** An API for manipulating SQL product definitions has been added.
3273 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3277 *** New inline access method "ksu" (kerberized su).
3279 *** The following access methods are discontinued: "ssh1_old",
3280 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3282 *** The user option `remote-file-name-inhibit-cache' controls whether
3283 remote file attributes are cached for better performance.
3285 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3286 default value to "".
3288 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3289 for remote machines which support SELinux.
3291 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3292 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3293 the degree of parallelism.
3295 ** VC and related modes
3297 *** Support for pulling on distributed version control systems.
3298 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3299 supported (currently with Bzr, Git, and Mercurial), to update the
3300 current branch and working tree. A prefix argument means to prompt
3301 the user for specifics, e.g. a pull location.
3303 *** `vc-update' is now an alias for `vc-pull'.
3305 *** Support for merging on distributed version control systems.
3306 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3307 is supported (currently with Bzr, Git, and Mercurial), to merge
3308 changes from another branch into the current one. It prompts for
3309 specifics, e.g. a merge source.
3311 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3312 shows a diff while querying the user. It defaults to t.
3314 *** Log entries in some Log View buffers can be toggled to display a
3315 longer description by typing RET (log-view-toggle-entry-display).
3316 This is currently supported for Bzr, Git, and Mercurial (to support
3317 another backend, define a `log-view-expanded-log-entry-function').
3318 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3319 use this to display the full log entry for the revision at point.
3321 *** New command `vc-ediff' allows visual comparison of two revisions
3322 of a file similar to `vc-diff', but using ediff backend.
3324 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3325 this was not advertised at the time.
3327 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3328 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3329 this was not advertised at the time.
3335 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3337 *** partial-completion-mode (complete.el) is obsolete.
3338 You can get a comparable behavior with:
3339 (setq completion-styles '(partial-completion initials))
3340 (setq completion-pcm-complete-word-inserts-delimiters t)
3342 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3344 *** pgg is obsolete (use EasyPG instead).
3346 *** sregex.el is obsolete, since rx.el is a strict superset.
3348 *** s-region.el and pc-select.el are obsolete.
3349 They are superseded by shift-select-mode, enabled by default since 23.1.
3351 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3355 *** The Landmark game is now invoked with `landmark', not `lm'.
3356 Its functions and variables have been similarly renamed.
3358 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3359 (This interfered with cua-mode.)
3361 *** f90.el has some support for Fortran 2008 syntax.
3363 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3365 *** New command `nato-region' converts text to NATO phonetic alphabet.
3368 * New Modes and Packages in Emacs 24.1
3370 ** Occur Edit mode applies edits made in *Occur* buffers to the
3371 original buffers. It is bound to "e" in Occur mode.
3373 ** New global minor mode electric-pair-mode.
3374 When enabled, typing an open parenthesis automatically inserts the
3375 matching closing one.
3377 ** New global minor mode electric-indent-mode.
3378 When enabled, typing certain characters triggers reindentation.
3379 Major modes wishing to use this can set electric-indent-chars or
3380 electric-indent-functions.
3382 ** New global minor mode electric-layout-mode.
3383 When enabled, typing certain characters automatically inserts newlines.
3384 Major modes wishing to use this can set electric-layout-rules.
3386 ** tabulated-list.el provides a generic major mode for tabulated data,
3387 from which other modes can be derived.
3389 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3391 ** secrets.el is an implementation of the Secret Service API, an
3392 interface to password managers like GNOME Keyring or KDE Wallet. The
3393 Secret Service API requires D-Bus for communication. The command
3394 `secrets-show-secrets' offers a buffer with a visualization of the
3397 ** notifications.el provides an implementation of the Desktop
3398 Notifications API. It requires D-Bus for communication.
3400 ** soap-client.el supports access to SOAP web services from Emacs.
3401 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3403 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3405 ** New emacs-lock.el package.
3406 The previous version has been moved to obsolete/old-emacs-lock.el.
3407 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3408 against exiting Emacs and killing the buffer can be set separately.
3409 The mechanism for automatically turning off protection for buffers
3410 with dead inferior processes has been generalized.
3413 * Incompatible Lisp Changes in Emacs 24.1
3415 ** Passing a nil argument to a minor mode function call now ENABLES
3416 the minor mode unconditionally. This is so that you can write e.g.
3418 (add-hook 'text-mode-hook 'foo-mode)
3420 to enable foo-mode in Text mode buffers, removing the need for
3421 `turn-on-foo-mode' style functions. This affects all mode commands
3422 defined by `define-minor-mode'. If called interactively, the mode
3423 command still toggles the minor mode.
3425 ** The return value of `backup-buffer' has changed.
3426 It is now a list of three elements, where the second element is a list
3427 describing the original file's SELinux context. If Emacs or the
3428 system lacks SELinux support, the context list is (nil nil nil nil).
3429 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3431 ** `char-direction-table' and the `char-direction' function were deleted.
3432 They were buggy and inferior to the new support of bidirectional
3433 editing introduced in Emacs 24. If you need the bidirectional
3434 properties of a character, use `get-char-code-property' with the last
3435 argument `bidi-class'.
3437 ** `copy-directory' now copies the source directory as a subdirectory
3438 of the target directory, if the latter is an existing directory. The
3439 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3440 the contents directly into a pre-existing target directory.
3442 ** For mouse click input events in the text area, the Y pixel
3443 coordinate in the POSITION list now counts from the top of the text
3444 area, excluding any header line. Previously, it counted from the top
3447 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3448 been further reduced. Now a backquote not followed by a space is
3449 always treated as a "new-style" backquote. Please remove all
3450 "old-style" backquotes from your code. If your code uses backquotes
3451 as documented in the Elisp manual, and compiles without warning, then
3452 you have nothing to do in this regard. Code not following the
3453 appropriate conventions may fail to compile.
3455 The most common cause of trouble seems to be an old-style backquote
3456 followed by a newline. Another cause of trouble is vector notation
3457 for key sequence notation: instead of [(control ,)] and [(control ')],
3458 you should write [(control ?,)] and [(control ?')], which will work in
3461 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3462 was not advertised at the time. The function `custom-initialize-delay'
3463 replaced all known uses.
3465 ** `view-buffer' now treats special mode-class in the same way that
3466 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3467 major mode is special).
3469 ** Menu and tool bar changes
3471 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3472 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3473 With these alist entries omitted, `make-frame' checks the value of the
3474 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3475 a menu-bar or tool-bar, respectively. If the alist entries are added,
3476 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3478 *** The menu bar bindings's caches are not used any more.
3479 Use (where-is-internal <def> nil t) instead.
3481 ** Regions created by mouse dragging are now normal active regions,
3482 similar to those created by shift-selection (see Selection changes
3483 above). In previous Emacs versions, these regions were delineated by
3484 `mouse-drag-overlay'; that variable has been removed.
3486 ** The fourth argument of `filter-buffer-substring' has been removed.
3487 If you want to remove text properties from the final result, simply
3488 pass the result through substring-no-properties.
3490 ** cl.el no longer provides `cl-19'.
3492 ** The following obsolete functions and aliases have been removed
3493 (the appropriate new function is given in parentheses; "not needed"
3494 means you can just remove all calls to the function in question):
3496 *** `comint-kill-output' (`comint-delete-output')
3497 *** `decompose-composite-char' (`char-to-string')
3498 *** `outline-visible' (`outline-invisible-p')
3499 *** `internal-find-face' (`facep')
3500 *** `internal-get-face' (`facep and check-face')
3501 *** `frame-update-faces' (not needed)
3502 *** `frame-update-face-colors' (`frame-set-background-mode')
3503 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3504 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3505 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3506 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3507 *** `x-make-font-unbold' (`make-face-unbold')
3508 *** `x-make-font-unitalic' (`make-face-unitalic')
3509 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3510 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3511 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3512 *** `char-bytes' (== 1)
3513 *** `isearch-return-char' (`isearch-printing-char')
3514 *** `make-local-hook' (not needed)
3515 *** `set-screen-height' (`set-frame-height')
3516 *** `set-screen-width' (`set-frame-width')
3518 ** The following obsolete variables and varaliases have been removed
3519 (the appropriate new variable is given in parentheses):
3521 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3522 *** `vc-header-alist' (`vc-BACKEND-header')
3523 *** `directory-sep-char' (== ?/)
3524 *** `font-lock-defaults-alist' (`font-lock-defaults')
3525 *** `e' (`float-e').
3527 ** The following obsolete files were removed:
3528 sc.el, x-menu.el, rnews.el, rnewspost.el
3530 ** The format of the finder-inf.el file has changed, since the Finder
3531 mechanism is now based on the package system. The variable
3532 `finder-package-info' is replaced by `package--builtins' and
3533 `finder-keywords-hash'.
3535 ** When generating autoloads, `update-directory-autoloads' no longer
3536 assumes every inspected file is in your `load-path'. It instead
3537 generates relative names according to the current `load-path'.
3540 * Lisp Changes in Emacs 24.1
3542 ** Code can now use lexical scoping by default instead of dynamic scoping.
3543 The `lexical-binding' variable enables lexical scoping for local
3544 variables. It is typically set via a file-local variable in the first
3545 line of the file, in which case it applies to all the code in that
3548 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3549 binding instead of the old dynamic binding mode.
3551 *** Lexically scoped interpreted functions are represented with a new form
3552 of function value which looks like (closure ENV ARGS &rest BODY).
3554 *** New macro `letrec' to define recursive local functions.
3556 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3557 So do `defcustom' and other forms that call `defvar' as a subroutine.
3559 *** New function `special-variable-p' to check whether a variable is
3560 declared as dynamically bound.
3562 *** The form ((lambda ...) ...) is deprecated.
3564 ** An Emacs Lisp testing tool is now included.
3565 Emacs Lisp developers can use this tool to write automated tests for
3566 their code. See the ERT info manual for details.
3568 ** Changes for bidirectional display and editing
3570 *** New function `current-bidi-paragraph-direction'.
3571 This returns the base direction of the paragraph at point.
3573 *** New function `bidi-string-mark-left-to-right'.
3574 Given a string containing characters from right-to-left scripts, this
3575 function returns another string which can be safely inserted into a
3576 buffer, such that any following text will be always displayed to the
3577 right of that string. (This works by appending an invisible Unicode
3578 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3580 This is useful when the buffer has overall left-to-right paragraph
3581 direction and you need to insert a string whose contents are not known
3582 in advance, without disrupting the layout of the line.
3586 *** Window tree functions are accessible in Elisp.
3587 Functions are provided to return the parent, siblings or child windows
3588 of any window including internal windows (windows not associated with a
3589 buffer) in the window tree.
3591 **** New function `window-valid-p' gives non-nil for live and internal
3594 **** Window manipulation can deal with internal windows.
3595 Many window handling functions like `split-window', `delete-window', or
3596 `delete-other-windows' as well as the window resizing functions can now
3597 act on any window including internal ones.
3599 *** window-total-height/-width vs window-body-height/-width.
3600 The function `window-height' has been renamed to `window-total-height'
3601 and `window-width' has been renamed to `window-body-width'. The old
3602 names are provided as aliases. Two new functions `window-total-width'
3603 and `window-body-height' are provided.
3605 *** Window parameters specific to window handling functions.
3606 For each window you can specify a parameter to override the default
3607 behavior of a number of functions like `split-window', `delete-window'
3608 and `delete-other-windows'. The variable `ignore-window-parameters'
3609 allows to ignore processing such parameters.
3611 *** New semantics of third argument of `split-window'.
3612 The third argument of `split-window' has been renamed to SIDE and can be
3613 set to any of the values 'below, 'right, 'above, or 'left to make the
3614 new window appear on the corresponding side of the window that shall be
3615 split. Any other value of SIDE will cause `split-window' to split the
3616 window into two side-by-side windows as before.
3618 *** Window resizing functions.
3619 A new standard function for resizing windows called `window-resize' has
3620 been introduced. This and all other functions for resizing windows no
3621 longer delete any windows when they become too small.
3623 *** Deleting the selected window now selects the most recently selected
3624 live window on that frame instead.
3626 *** `adjust-window-trailing-edge' adjustments.
3627 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3628 is able to resize other windows if a window adjacent to the trailing
3629 edge cannot be shrunk any more. This makes its behavior more similar to
3630 that of Emacs 21 without compromising, however, its inability to delete
3631 windows which was introduced in Emacs 22.
3633 *** Window-local buffer lists.
3634 Windows now have local buffer lists. This means that removing a buffer
3635 from display in a window will preferably show the buffer previously
3636 shown in that window with its previous window-start and window-point
3637 positions. This also means that the same buffer may be automatically
3638 shown twice even if it already appears in another window.
3640 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3641 which if non-nil requires the buffer to be displayed in the currently
3642 selected window, signaling an error otherwise. If nil, another window
3643 can be used, e.g. if the selected one is strongly dedicated.
3645 *** `split-window-vertically' and `split-window-horizontally' renamed
3646 to `split-window-below' and `split-window-right' respectively.
3647 The old names are kept as aliases.
3651 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3652 named ACTION, and takes a display action of the same form as
3653 `display-buffer-base-action' (see Changes, above). A non-nil,
3654 non-list value is treated specially, as the old meaning.
3656 **** New variable `display-buffer-overriding-action'.
3658 **** The procedure of `display-buffer' etc. to choose a window is
3659 determined by combining `display-buffer-overriding-action',
3660 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3661 and `display-buffer-fallback-action'. The second and fourth of these
3662 are user-customizable variables.
3664 See the docstring of `display-buffer' for details.
3666 *** New functions `window-state-get' and `window-state-put'.
3667 These functions allow to save and restore the state of an arbitrary
3668 frame or window as an Elisp object.
3672 *** New variable `completion-extra-properties' used to specify extra
3673 properties of the current completion:
3674 - :annotate-function, same as the old completion-annotate-function.
3675 - :exit-function, function to call after completion took place.
3677 *** Functions on `completion-at-point-functions' can return any of the
3678 properties valid for `completion-extra-properties'.
3680 *** `completion-annotate-function' is obsolete.
3682 *** New `metadata' method for completion tables. The metadata thus returned
3683 can specify various details of the data returned by `all-completions':
3684 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3685 used to select a style in completion-category-overrides.
3686 - `annotation-function' to add annotations in *Completions*.
3687 - `display-sort-function' to specify how to sort entries in *Completions*.
3688 - `cycle-sort-function' to specify how to sort entries when cycling.
3690 *** `minibuffer-local-filename-must-match-map' is not used any more.
3691 Instead, the bindings in `minibuffer-local-filename-completion-map'
3692 are combined with `minibuffer-local-must-match-map'.
3694 *** New variable `completing-read-function' allows overriding the
3695 behavior of `completing-read'.
3697 ** `glyphless-char-display' can now distinguish between graphical and
3698 text terminal display, via a char-table entry that is a cons cell.
3700 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3701 Instead, the offending function is removed.
3705 *** New function `run-hook-wrapped' for running an abnormal hook by
3706 passing the hook functions as arguments to a "wrapping" function.
3707 Like `run-hook-with-args-until-success', it stops at the first
3708 non-nil return value.
3710 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3711 set of "wrapping" filters, similar to around advice.
3712 (A version of this macro was actually added in Emacs 23.2 but was not
3713 advertised at the time.)
3717 *** New macro `condition-case-unless-debug' (this was actually added in
3718 Emacs 23.1 as condition-case-no-debug, but not advertised)
3720 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3722 *** Variable `stack-trace-on-error' removed.
3724 *** The debugger can now "continue" from an error, which means it will
3725 jump to the error handler as if the debugger had not been invoked
3726 instead of jumping all the way to the top-level.
3728 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3729 This can be useful when `inhibit-quit' is set.
3731 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3732 named Emacs server instances.
3734 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3735 to redirect STDOUT to a file.
3737 ** The function `format-time-string' now supports the %N directive,
3738 for higher-resolution time stamps.
3740 ** New input reading functions
3742 *** New function `read-char-choice' reads a restricted set of
3743 characters, discarding any inputs not inside the set.
3745 *** The command `read-color' now requires a match for a color name
3746 or RGB triplet, instead of signaling an error if the user provides
3749 **** `facemenu-read-color' is now an alias for `read-color'.
3751 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3752 The variable is now used to load all kind of supported dynamic libraries,
3753 not just image libraries. The previous name is still available as an
3756 ** Syntax parsing changes
3758 *** New variable `syntax-propertize-function'.
3759 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3760 This allows syntax-table properties to be set independently from font-lock:
3761 just call syntax-propertize to make sure the text is propertized.
3762 Together with this new variable come a new hook
3763 syntax-propertize-extend-region-functions, as well as two helper functions:
3764 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3765 as-is; and syntax-propertize-rules which provides a new way to specify
3768 *** Syntax tables support a new "comment style c" additionally to style b.
3770 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3772 ** frame-local variables cannot be let-bound any more.
3774 ** Major and minor mode changes
3776 *** `set-auto-mode' now respects mode: local variables at the end of files,
3777 as well as those in the -*- line.
3779 *** `prog-mode' is a new major mode from which programming modes
3782 **** `prog-mode-hook' can be used to enable features for programming
3783 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3784 on-the-fly spell checking for comments and strings.
3786 *** New hook `change-major-mode-after-body-hook', run by
3787 `run-mode-hooks' just before any other mode hooks.
3789 *** Enabled globalized minor modes can be disabled in specific major modes.
3790 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3791 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3793 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3795 ** File-handling changes
3797 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3798 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3799 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3800 argument is supplied (see Trash changes, above).
3802 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3804 ** Tool-bars can display separators.
3805 Tool-bar separators are handled like menu separators in menu-bar maps,
3806 i.e. via menu entries of the form `(menu-item "--")'.
3810 *** Animated images support (currently animated gifs only).
3812 **** `image-animated-p' returns non-nil if an image can be animated.
3814 **** `image-animate' animates a supplied image spec.
3816 **** `image-animate-timer' returns the timer object for an image that
3819 *** `image-extension-data' has been renamed to `image-metadata'.
3820 The old name is an obsolete alias to the new one.
3822 *** Image mode can view any image type that ImageMagick supports.
3823 This requires Emacs to be built with ImageMagick support.
3825 **** New function `imagemagick-types', defined if ImageMagick support
3826 is enabled, returns a list of image file extensions that your
3827 ImageMagick installation supports.
3829 **** New function `imagemagick-register-types' enables ImageMagick
3830 image types in Image mode and in `create-image' and other helper
3833 **** New option `imagemagick-types-inhibit' excludes certain
3834 ImageMagick image types from `imagemagick-register-types'.
3836 **** With ImageMagick support, there are extra Image mode commands to
3837 resize and rotate images: `image-transform-fit-to-height',
3838 `image-transform-fit-to-width', `image-transform-set-rotation', and
3839 `image-transform-set-scale'.
3841 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3842 passes it to the mail user agent function. This argument specifies an
3843 action for returning to the caller after finishing with the mail. For
3844 example, this is used by Rmail to optionally delete a mail window.
3846 ** XML and HTML parsing
3847 If Emacs is compiled with libxml2 support, there are two new
3848 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3849 and `libxml-parse-xml-region' (which parses XML). Both return an
3850 Emacs Lisp parse tree.
3852 ** Networking and encryption changes
3854 *** `open-network-stream' can now be used to open an encrypted stream.
3855 It now accepts an optional `:type' parameter for initiating a TLS
3856 connection, directly or via STARTTLS. To do STARTTLS, additional
3857 parameters (`:end-of-command', `:success', `:capabilities-command')
3858 must also be supplied.
3860 *** New library gnutls.el.
3861 The new function `gnutls-available-p' returns non-nil if Emacs is
3862 built with GnuTLS support. The main entry points are
3863 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3864 these functions through `open-network-stream', because that can
3865 upgrade connections through STARTTLS opportunistically or use plain
3866 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3869 *** New primitive `secure-hash' that supports many secure hash algorithms:
3870 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3871 sha1.el has been removed. The `sha1' feature is provided by default.
3875 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3877 ** Progress reporters can now "spin".
3878 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3879 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3880 time you call `progress-reporter-update' on that progress reporter,
3881 with a nil or omitted VALUE argument, the reporter message is
3882 displayed with a "spinning bar".
3884 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3885 being reverted, even if the buffer has a local `revert-buffer-function'.
3887 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3888 If delayed-warnings-list is non-nil, the command loop calls
3889 `delayed-warnings-hook' after `post-command-hook'. At present, this
3890 is only used by Emacs on some platforms to display warnings during
3891 startup, which might otherwise not be noticed. This uses the
3892 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3894 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3896 ** New function `make-composed-keymap' that constructs a new keymap
3897 from multiple input maps. You can use this to make a keymap that
3898 inherits from multiple maps, eg:
3899 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3901 ** New function `string-prefix-p'.
3902 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3904 ** New reader macro ## that stands for the empty symbol.
3905 This means that the empty symbol can now be read back. Also, #: by itself
3906 (when not immediately followed by a possible symbol character) stands for
3907 an empty uninterned symbol.
3909 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3911 ** The following functions and variables are obsolete:
3913 *** `tooltip-use-echo-area' is obsolete.
3914 Rather than setting this to t, disable Tooltip mode instead.
3916 *** buffer-substring-filters is obsolete.
3917 Use `filter-buffer-substring-functions' instead.
3919 *** `byte-compile-disable-print-circle' is obsolete.
3921 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3922 Use `post-command-hook' instead.
3924 *** `font-lock-maximum-size' is obsolete.
3927 * Changes in Emacs 24.1 on Non-Free Operating Systems
3929 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3930 and also when HOME is set to C:\ by default.
3932 ** New configure.bat options
3934 *** --enable-checking builds Emacs with extra runtime checks.
3936 *** --distfiles specifies files to be included in binary distribution.
3938 *** --without-gnutls disables automatic GnuTLS detection.
3940 *** --lib for general library linkage, works with the USER_LIBS build variable.
3942 ** New make target `dist' to create binary distribution for MS Windows.
3944 ** The Lisp function `w32-default-color-map' is now obsolete.
3945 (It is only used internally in the Emacs C code.)
3947 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3948 reappear on mouse-over. (Requires OS X 10.6 or later.)
3950 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3951 other platforms, rather than inserting its contents into the buffer.
3954 ----------------------------------------------------------------------
3955 This file is part of GNU Emacs.
3957 GNU Emacs is free software: you can redistribute it and/or modify
3958 it under the terms of the GNU General Public License as published by
3959 the Free Software Foundation, either version 3 of the License, or
3960 (at your option) any later version.
3962 GNU Emacs is distributed in the hope that it will be useful,
3963 but WITHOUT ANY WARRANTY; without even the implied warranty of
3964 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3965 GNU General Public License for more details.
3967 You should have received a copy of the GNU General Public License
3968 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3973 paragraph-separate: "[
\f]*$"