1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.5
28 ** Building Emacs now requires GNU make.
30 ** By default, Emacs no longer works on IRIX. We expect that Emacs
31 users are not affected by this, as SGI stopped supporting IRIX in
32 December 2013. If you are affected, please send a bug report. You
33 should be able to work around the problem either by porting the Emacs
34 undumping code to GCC under IRIX, or by configuring --with-wide-int,
35 or by sticking with Emacs 24.4.
38 ** The configure option `--with-pkg-config-prog' has been removed.
39 Use the PKG_CONFIG environment variable instead if you need to.
42 * Startup Changes in Emacs 24.5
45 * Changes in Emacs 24.5
48 ** The default value of `history-length' has increased to 100.
51 ** The new variable `term-file-aliases' replaces some files from lisp/term.
52 The function `tty-run-terminal-initialization' consults this variable
53 when deciding what terminal-specific initialization code to run.
56 ** New variable `system-configuration-features', listing some of the
57 main features that Emacs was compiled with. This is mainly intended
58 for use in Emacs bug reports.
61 * Editing Changes in Emacs 24.5
63 Emacs now supports "bracketed paste mode" when running on a terminal
64 that supports it. This facility allows Emacs to understand pasted
65 chunks of text as strings to be inserted instead of interpreting each
66 character in the pasted text as actual user input, resulting in a
67 paste experience similar to that under a window system and significant
68 performance improvements when pasting large amounts of text.
71 * Changes in Specialized Modes and Packages in Emacs 24.5
74 ** The Rmail commands d, C-d and u now handle repeat counts
75 to delete or undelete multiple messages.
80 *** New commands to insert diary entries with Chinese dates:
81 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
82 `diary-chinese-insert-monthly-entry'
83 `diary-chinese-insert-yearly-entry'
86 *** Calendar can list and mark diary entries with Chinese dates:
87 `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
89 ** The URL package accepts now the protocols "ssh", "scp" and "rsync".
90 When `url-handler-mode' is enabled, file operations for these
91 protocols as well as for "telnet" and "ftp" are passed to Tramp.
99 * New Modes and Packages in Emacs 24.5
102 * Incompatible Lisp Changes in Emacs 24.5
104 ** window-configurations do not record the buffers's marks any more.
106 ** inhibit-modification-hooks now also inhibits lock-file checks as well as
107 active region handling.
109 ** deactivate-mark is now buffer-local.
111 ** cl-the now asserts that its argument is of the given type.
114 * Lisp Changes in Emacs 24.5
116 ** New function `function-put' to use instead of `put' for function properties.
119 ** New properties that can be specified with `declare':
120 *** (interactive-only INSTEAD), tells to use INSTEAD for non-interactive use.
121 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
122 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
125 ** You can access the slots of structures using `cl-struct-slot-value'.
128 * Changes in Emacs 24.5 on Non-Free Operating Systems
131 * Installation Changes in Emacs 24.4
134 ** Emacs can now be compiled with ACL support.
135 This happens by default if a suitable support library is found at
136 build time, like libacl on GNU/Linux. To prevent this, use the
137 configure option `--disable-acl'. See below for related features.
140 ** Emacs can now be compiled with file notification support.
141 This happens by default if a suitable system library is found at
142 build time. To prevent this, use the configure option
143 `--without-file-notification'. See below for file-notify features.
144 This feature is not available for the Nextstep port.
147 ** Emacs can now be compiled with zlib support.
148 This happens by default if zlib is present, which it normally is.
149 To prevent this, use the configure option `--without-zlib'.
150 This provides the function `zlib-decompress-region'; see below for details.
153 ** The configure option `--without-compress-info' has been generalized,
154 and renamed to `--without-compress-install'. It now prevents compression
155 of _any_ files during installation.
158 ** The configure option `--with-crt-dir' has been removed.
159 It is no longer needed, as the crt*.o files are no longer linked specially.
162 ** Directories passed to configure option `--enable-locallisppath' are
163 no longer created during installation.
166 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
167 This requires pkg-config to be available at build time.
170 * Startup Changes in Emacs 24.4
173 ** When initializing `load-path', an empty element in the EMACSLOADPATH
174 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
175 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
176 load-path (the one that would have been used if EMACSLOADPATH was unset).
177 This makes it easier to _extend_ the load-path via EMACSLOADPATH
178 (previously, EMACSLOADPATH had to specify the complete load-path,
179 including the defaults). (In older versions of Emacs, an empty element
180 was replaced by ".", so use an explicit "." now if that is what you want.)
183 ** The -L option, which normally prepends its argument to load-path,
184 will instead append, if the argument begins with `:' (or `;' on MS Windows;
185 i.e., `path-separator').
188 ** If you use either site-load.el or site-init.el to customize the dumped
189 Emacs executable, any changes to `load-path' that these files make
190 will no longer be present after dumping. To affect a permanent change
191 to `load-path', use the `--enable-locallisppath' option of `configure'.
194 ** The user option `initial-buffer-choice' can now specify a function
195 to set up the initial buffer.
198 * Changes in Emacs 24.4
201 ** New function `zlib-decompress-region', which decompresses gzip- and
202 zlib-format compressed data using built-in zlib support, if available.
205 ** New option `gnutls-verify-error', if non-nil, means that Emacs
206 should reject SSL/TLS certificates that GnuTLS determines as invalid.
207 (This option defaults to nil at present, but this is expected to change
208 in a future release.)
211 ** Emacs now supports menus on text-mode terminals.
212 If the terminal supports a mouse, clicking on the menu bar, or on
213 sensitive portions of the mode line or header line, will drop down the
214 menu defined at that position. Likewise, clicking C-mouse-2 or
215 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
218 If the text terminal does not support a mouse, you can activate the
219 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
221 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
222 customize the option `tty-menu-open-use-tmm' to a non-nil value.
223 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
227 ** The *Messages* buffer is created in `messages-buffer-mode',
228 a new major mode, with read-only status. Any code that might create
229 the *Messages* buffer should call the function `messages-buffer' to do
230 so and set up the mode.
233 ** Emacs can now support ACLs (access control lists).
234 This requires a suitable support library to be found at build time.
235 On GNU/Linux, the POSIX ACL interface is used via libacl.
236 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
239 *** Emacs preserves the ACL entries of files when backing up.
241 *** New functions `file-acl' and `set-file-acl' get and set the ACL
244 ** Multi-monitor support has been added.
247 *** New functions `display-monitor-attributes-list' and
248 `frame-monitor-attributes' can be used to obtain information about
249 each physical monitor on multi-monitor setups.
252 *** The functions `display-pixel-width' and `display-pixel-height' now
253 behave consistently among the platforms: they return the pixel width
254 or height for all physical monitors associated with the given display
255 as if they were on X. To get information for each physical
256 monitor, use the new functions above. Similar notes also apply to
257 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
258 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
261 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
262 You can change the default by customizing `blink-cursor-blinks'.
265 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
266 This affects View mode, etc.
269 ** The default value of `make-backup-file-name-function' is no longer nil.
270 Instead it defaults to a function that does what the nil value used to.
275 *** The command `apropos-variable' is renamed to `apropos-user-option'.
276 `apropos-user-option' shows all user options while `apropos-variable'
277 shows all variables. When called with a universal prefix argument,
278 the two commands swap their behaviors. When `apropos-do-all' is
279 non-nil, they output the same results.
282 *** The key `?' now describes prefix bindings, like `C-h'.
285 *** The command `describe-function' has been extended for EIEIO.
286 Running it on constructors will show a full description of the
287 generated class. For generic functions, it will show all
288 implementations together with links to the source. The old commands
289 `describe-class', `describe-constructor' and `describe-generic' were
293 *** The function `quail-help' is no longer an interactive command.
294 Use `C-h C-\' (`describe-input-method') instead.
299 *** ImageMagick images now support the :max-width and :max-height keywords.
302 *** When using `create-image' with image data, you can pass a :format
303 attribute (via the property-list argument) in order to help
304 ImageMagick detect the image type. The value should be a MIME
305 content-type that is found in the new variable `image-format-suffixes'.
307 ** Frame and window changes
310 *** The function `window-in-direction' introduced in Emacs 24.1 now
311 takes additional arguments for specifying a reference point, wrapping
312 selection around frame borders, and specifying ways to select the
316 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
317 bound to <f11> and M-<f10>, respectively.
320 *** New hooks `focus-in-hook', `focus-out-hook'.
321 These are normal hooks run when an Emacs frame gains or loses input focus.
324 *** Emacs can now change frame sizes in units of pixels, rather than
325 text rows or columns. When maximizing a frame or making it fullscreen,
326 remaining extra pixels are no longer given to the minibuffer, the rightmost
327 fringe, or other unusable space, but are distributed among the text
328 areas of the frame's windows. If the new option `frame-resize-pixelwise'
329 is non-nil, all frame size changes happen pixelwise and set the
330 corresponding size hints for the window manager.
333 *** Emacs can now change window sizes in units of pixels.
334 Mouse-dragging a mode line or window divider now changes the size of
335 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
336 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
337 resize windows pixelwise. Most functions for changing or accessing
338 window sizes now have an additional argument that allows changes to apply,
339 or values to be returned, in pixels instead of lines/columns.
342 *** The functions `window-body-height' and `window-body-width' now never
343 count partially visible lines or columns if called with a nil PIXELWISE
347 *** Emacs can now draw dividers between adjacent windows. To put
348 dividers between side-by-side/vertically stacked windows customize the
349 frame parameters `right-divider-width' and `bottom-divider-width' to
350 some positive integer. You can drag dividers with the mouse (they show
351 a corresponding cursor when the mouse hovers over them). You can change
352 the appearance of dividers by customizing the faces `window-divider',
353 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
354 two are useful to provide a 3D effect, or to better distinguish dividers
355 from surrounding display objects.
358 *** New functions are provided to return the pixel sizes of window
359 components, namely `window-scroll-bar-width', `window-mode-line-height'
360 `window-header-line-height', `window-right-divider-width' and
361 `window-bottom-divider-width'.
364 *** The new function `window-text-pixel-size' returns the size of the
365 text of a window's buffer in pixels. This allows functions like
366 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
367 window to its buffer as it will be displayed.
370 *** `fit-window-to-buffer' can now resize windows in both dimensions.
371 This behavior is controlled by the new option
372 `fit-window-to-buffer-horizontally'. The new option
373 `fit-frame-to-buffer' allows to fit the window's frame to its buffer.
376 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
377 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
378 control the size of the frame and its position on screen.
381 *** Temp Buffer Resize Mode can now adjust height and width of windows
382 and frames. `temp-buffer-resize-mode' is now able to adjust the height
383 and the width of a window displaying a temporary buffer. The new option
384 `temp-buffer-max-width' allows to control the width of temporary buffer
385 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
386 and the buffer appears in the root window of a frame, Temp Buffer Resize
387 Mode will try to adjust width and/or height of the frame.
390 *** `split-window' is now a non-interactive function, not a command.
391 As a command, it was a special case of `C-x 2' (`split-window-below'),
392 and as such superfluous. After being reimplemented in Lisp, its
393 interactive form was mistakenly retained.
396 *** The functions `window-size' and `window-total-size' now have an
397 optional argument to return a rounded size value.
400 *** `window-state-put' now allows to put a window state into internal
404 *** New option `scroll-bar-adjust-thumb-portion'.
405 Available only on X, this option allows to control over-scrolling
406 using the scroll bar (i.e. dragging the thumb down even when the end
407 of the buffer is visible).
410 *** New basic action function `display-buffer-in-previous-window' has
411 `display-buffer' display a buffer in a window previously showing that
415 *** New basic action function `display-buffer-at-bottom' has
416 `display-buffer' choose or make a window at the bottom of the selected
420 *** New display action function `display-buffer-no-window' to not
421 display the buffer in a window.
424 *** New display action alist entry `allow-no-window' to indicate the
425 caller of `display-buffer' is ready to handle the case of not
426 displaying the buffer in a window.
428 ** Lisp evaluation changes
430 *** `eval-defun' on an already defined defcustom calls the :set function,
434 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
435 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
436 zero prefix argument. This disables truncation of lists in the output,
437 equivalent to setting `(eval-expression-)print-length' and
438 `(eval-expression-)print-level' to nil. Additionally, it causes integers
439 to be printed in other formats (octal, hexadecimal, and character).
442 *** New hook `eval-expression-minibuffer-setup-hook' run by
443 `eval-expression' on entering the minibuffer.
446 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
449 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
450 because it affects caching of paragraph scanning results as well.
451 There is no reason to set this to nil except for debugging purposes.
454 ** The option `set-mark-default-inactive' has been deleted.
455 This unfinished feature was introduced by accident in Emacs 23.1;
456 simply disabling Transient Mark mode does the same thing.
459 ** The default value of `comment-use-global-state' is now t,
460 and this variable has been marked obsolete.
463 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
464 and works for git too, if you fetch the repository notes.
467 ** New option `load-prefer-newer' affects how the `load' function chooses
468 the file to load. If this is non-nil, then when both .el and .elc
469 versions of a file exist, and the caller did not explicitly specify
470 which one to load, then the newer file is loaded. The default, nil,
471 means to always load the .elc file.
474 * Editing Changes in Emacs 24.4
476 ** Indentation changes
479 *** `electric-indent-mode' is now enabled by default.
480 Typing RET reindents the current line and indents the new line.
481 `C-j' inserts a newline but does not indent. In some programming modes,
482 additional characters are electric (eg `{').
485 *** New buffer-local `electric-indent-local-mode'.
488 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
489 When invoked without a prefix argument, it now activates a transient
490 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
491 the text indentation in the region. Typing any other key resumes
492 normal editing behavior.
495 *** `tab-stop-list' is now implicitly extended to infinity by repeating
496 the last step. Its default value is changed to nil, which means a tab
497 stop every `tab-width' columns.
500 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
501 When called in succession, it cycles between spacing conventions:
502 one space, no spaces, original spacing.
505 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
506 a line after a one-letter word, which is an error in some typographical
507 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
510 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
513 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
514 Most commands are still unaware of it, but kill/yank do work on the rectangle.
517 ** New option `visual-order-cursor-movement'.
518 If this is non-nil, cursor motion with arrow keys will follow the
519 visual order of characters on the screen: <left> always moves to the
520 left, <right> always moves to the right, disregarding the surrounding
521 bidirectional context.
526 *** All interactive commands that read a register (`copy-to-register', etc.)
527 now display a temporary window after `register-preview-delay' seconds
528 that summarizes existing registers. To disable this, set that option to nil.
529 Interactive commands that read registers and want to make use of this
530 should use `register-read-with-preview' to read register names.
533 *** New command `frameset-to-register' bound to `C-x r f', replacing
534 `frame-configuration-to-register'. It offers similar functionality,
535 plus enhancements like the ability to restore deleted frames.
536 (`frame-configuration-to-register' still exists, but no longer has a
540 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
544 ** New command `delete-duplicate-lines'.
545 This searches the region for identical lines, and removes all but one
546 copy of each repeated line. The lines need not be sorted.
549 ** `blink-matching-paren' now only highlights the matching open-paren
550 by default, instead of moving cursor. Set this variable to `jump' to
551 enable the old behavior.
554 * Changes in Specialized Modes and Packages in Emacs 24.4
557 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
559 ~/.emacs.d/timelog replaces ~/.timelog
560 ~/.emacs.d/vip replaces ~/.vip
561 ~/.emacs.d/viper replaces ~/.viper
562 ~/.emacs.d/ido.last replaces ~/.ido.last
563 ~/.emacs.d/kkcrc replaces ~/.kkcrc
564 ~/.emacs.d/quickurls replaces ~/.quickurls
565 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
566 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
567 ~/.emacs.d/places replaces ~/.emacs-places
568 ~/.emacs.d/shadows replaces ~/.shadows
569 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
570 ~/.emacs.d/strokes replaces ~/.strokes
571 ~/.emacs.d/notes replaces ~/.notes
572 ~/.emacs.d/type-break replaces ~/.type-break
573 Also the following files used by the now obsolete otodo-mode.el:
574 ~/.emacs.d/todo-do replaces ~/.todo-do
575 ~/.emacs.d/todo-done replaces ~/.todo-done
576 ~/.emacs.d/todo-top replaces ~/.todo-top
578 ** Backtrace and debugger
581 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
582 display of local variables of the current stack frame.
585 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
586 the lexical environment when evaluating the code in the context at point
587 (and so allows you to access lexical variables).
590 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
593 ** Battery information can now be retrieved from BSD's `apm' utility.
596 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
598 ** Calendar and Diary
601 *** New faces `calendar-weekday-header', `calendar-weekend-header',
602 and `calendar-month-header'.
605 *** New option `calendar-day-header-array'.
608 *** New variable `diary-from-outlook-function', used by the command
609 `diary-from-outlook'.
612 *** The variable `calendar-font-lock-keywords' is obsolete.
617 *** Calc by default now uses the Gregorian calendar for all dates, and
618 uses January 1, 1 AD as its day number 1. Previously Calc used the
619 Julian calendar for dates before September 14, 1752, and it used
620 December 31, 1 BC as its day number 1; the new scheme is more
621 consistent with Calendar's calendrical system and day numbering.
624 *** The new option `calc-gregorian-switch' lets you configure if
625 (and when) Calc switches from the Julian to the Gregorian calendar.
628 *** Support for ISO 8601 dates.
635 **** The cpp-root project now supports executing a compile command.
636 It can be set through the new :compile-command slot or the
637 buffer-local variable `compile-command'.
640 **** Better selection of include directories for the 'linux' project.
641 Include directories now support out-of-tree build directories and
642 target architecture auto-detection.
647 **** Improved detection of used namespaces in current scope in C++.
649 **** Parsing of default values for variables and function arguments in C/C++.
650 They are also displayed by the summarize feature in the mode line.
652 **** Improved parsing of function pointers in C/C++.
653 This also includes parsing of function pointers as function arguments.
655 **** Parsing of C/C++ preprocessor macros that open new scope.
656 For example, this enables parsing of macros that open new namespaces.
658 **** Support for 'this' pointer in inline member functions in C++.
663 *** New macro `cl-tagbody'.
664 This executes statements while allowing for control transfer to labels.
667 *** letf is now just an alias for cl-letf.
672 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
673 Hence, you can now enable it independently from those modes, and from
674 `transient-mark-mode'.
677 *** `cua-highlight-region-shift-only' is now obsolete.
678 You can disable `transient-mark-mode' to get the same result.
681 *** CUA's rectangles can now be used without CUA by calling the command
682 `cua-rectangle-mark-mode'.
687 *** Support for completion, ElDoc, and Flycheck has been added.
690 *** The current CFEngine syntax is parsed from "cf-promises -s json".
691 There is a fallback syntax available if you don't have cf-promises or
692 if your version doesn't support that option. See option `cfengine-cf-promises'.
695 ** Delete Selection mode can now be used without Transient Mark mode.
700 *** `desktop-save-mode' by default now auto-saves an existing desktop file
701 after `desktop-auto-save-timeout'. To disable this, customize that option
705 *** Desktop now saves and restores the frame/window configuration.
706 To disable this, set `desktop-restore-frames' to nil.
707 See also related options `desktop-restore-reuses-frames',
708 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
711 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
712 such as file ownership or permissions, are visible in Dired buffers.
713 See the new options `dired-hide-details-hide-symlink-targets' and
714 `dired-hide-details-hide-information-lines' for customizing what to hide.
717 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
718 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
719 The results display in the mode line.
721 ** Electric Pair mode
724 *** New option `electric-pair-preserve-balance', enabled by default.
725 If non-nil, pairing/skipping only kicks in when that help the balance
726 of parentheses and quotes, i.e. the buffer should end up at least as
729 You can further control this behavior by adjusting the predicates
730 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
733 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
734 In `electric-pair-mode', the commands `backward-delete-char' and
735 `backward-delete-char-untabify' are now bound to electric variants
736 that delete the closer when invoked between adjacent pairs.
739 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
740 In `electric-pair-mode', inserting a newline between adjacent pairs
741 opens an extra newline after point, which is indented if
742 `electric-indent-mode' is also set.
745 *** New option `electric-pair-skip-whitespace', enabled by default.
746 This controls if skipping over closing delimiters should jump over any
747 whitespace slack. Setting it to `chomp' makes it delete this
748 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
751 *** New variables control the pairing in strings and comments.
752 You can customize `electric-pair-text-pairs' and
753 `electric-pair-text-syntax-table' to tweak pairing behavior inside
754 strings and comments.
757 ** New EPA option `epa-mail-aliases'.
758 You can set this to a list of email address aliases that `epa-mail-encrypt'
759 should use to find keys.
762 ** New ERC option `erc-accidental-paste-threshold-seconds'.
763 If set to a number, this can be used to avoid accidentally pasting large
764 amounts of data into the ERC input.
767 ** New ERT macro `skip-unless' allows skipping ERT tests.
768 See the ERT manual for details.
773 *** `eshell' now supports visual subcommands and options.
774 Eshell has been able to handle "visual" commands (interactive,
775 non-line oriented commands such as top that require display
776 capabilities not provided by eshell) by running them in an Emacs
777 terminal emulator. See `eshell-visual-commands'.
779 This feature has been extended to subcommands and options that make a
780 usually line-oriented command a visual command. Typical examples are
781 "git log" and "git <command> --help", which display their output in a
782 pager by default. See `eshell-visual-subcommands' and
783 `eshell-visual-options'.
786 *** New Eshell-Tramp module.
787 External su and sudo commands are now the default; the internal,
788 Tramp-using variants can still be used by enabling the eshell-tramp
792 ** New F90 mode option `f90-smart-end-names'.
795 Icomplete is now more similar to Ido.
798 *** Icomplete by default now applies to all forms of minibuffer completion.
799 The variable `icomplete-with-completion-tables' (now a user option)
800 controls this. To restore the old behavior, set it back to
801 '(internal-complete-buffer).
804 *** You can navigate through and select completions using the keys
805 from `icomplete-minibuffer-map'.
808 *** The string that separates potential completions is now a customizable
809 option (`icomplete-separator'). The default is " | " rather than ",".
812 *** New face `icomplete-first-match'; and new options
813 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
816 *** The option `icomplete-show-key-bindings' has been removed.
821 *** An Ido user manual is now included.
824 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
825 This means to use virtual buffers if the current ido input does not match
829 *** The variable `ido-decorations' can optionally have two new elements,
830 which are the brackets to use around the sole remaining completion.
835 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
836 visit the next image file and the previous image file in the same
837 directory, respectively.
840 *** New commands to show specific frames of multi-frame images.
841 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
842 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
845 *** New commands to speed up, slow down, or reverse animation.
846 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
847 speed up and slow down the animation. `a r' (`image-reverse-speed')
848 to reverse it and `a 0' (`image-reset-speed') to reset it.
851 *** The command `image-mode-fit-frame' deletes other windows.
852 When toggling, it restores the frame's previous window configuration.
853 It also has an optional frame argument, which can be used by Lisp
854 callers to fit the image to a frame other than the selected frame.
859 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
860 the symbol found near point.
863 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
864 will cycle through faces in `hi-lock-face-defaults' without prompting.
867 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
872 *** New Info face `info-index-match', used to highlight matches in index
873 entries displayed by `Info-index-next', `Info-virtual-index' and
877 *** The Info-edit command is obsolete. Editing Info nodes by hand
878 has not been relevant for some time.
883 *** New option `js-switch-indent-offset'.
886 *** Better indentation of multiple-variable declarations.
887 If a declaration spans several lines, variables on the following lines
888 are lined up to the first one.
891 *** Recognition and better indentation of continuations in array comprehensions.
894 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
899 *** Font locking for Texinfo comments and new keywords.
901 *** Completion in Octave file buffers.
905 *** Jump to definition.
907 *** Documentation lookup/search.
910 ** OPascal mode is the new name for Delphi mode
913 *** All delphi-* variables and functions have been renamed to opascal-*.
914 Obsolete aliases exist for those likely to have been used externally.
917 *** The option `delphi-newline-always-indents' has been removed.
918 Use `electric-indent-mode' instead.
921 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
926 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
927 to filter the list of packages by a keyword.
930 *** In the `describe-package' buffer, there are now buttons listing the
931 keywords related to the package. Click on a button to see other packages
932 related to that keyword.
935 *** The format of `archive-contents' files, generated by package
936 repositories, has changed to allow a new (fifth) element in the data
937 vectors, containing an associative list with extra properties.
938 (For example, `describe-package' uses the `:url' extra property to
939 display a "Homepage" header.)
942 ** In Prolog mode, `prolog-use-smie' has been removed,
943 along with the non-SMIE indentation code.
948 *** The new command `remember-notes' creates a buffer that is saved on exit.
949 You can use it as a more permanent *scratch* buffer.
952 *** Remember can now store notes in separate files.
953 To use this, add `remember-store-in-files' to the `remember-handler-functions'
954 option. The files are saved in `remember-data-directory' using
955 names specified by `remember-directory-file-name-format'.
960 *** Customize `rmail-mbox-format' to influence some minor aspects of
961 how Rmail displays non-MIME messages.
964 *** The `unrmail' command now converts from BABYL to mboxrd format,
965 rather than mboxo. Customize `unrmail-mbox-format' to change this.
970 *** Improved syntax highlighting and indentation.
973 *** New `electric-indent-mode' integration.
976 *** New option `ruby-encoding-magic-comment-style'.
979 *** New option `ruby-custom-encoding-magic-comment-template'.
982 *** New option `ruby-align-to-stmt-keywords'.
985 *** New option `ruby-align-chained-calls'.
988 *** More Ruby file types have been added to `auto-mode-alist'.
990 ** Search and Replace
993 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
994 starts a symbol (identifier) incremental search forward with the
995 symbol found near point added to the search string initially.
998 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
999 and adds it to the search string.
1002 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
1005 *** `query-replace' skips invisible text when `search-invisible' is nil,
1006 and opens overlays with hidden text when `search-invisible' is `open'.
1009 *** A negative prefix arg of replacement commands replaces backward.
1010 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
1011 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
1014 *** By default, prefix arguments do not now terminate Isearch mode.
1015 Set `isearch-allow-prefix' to nil to restore old behavior.
1018 *** More Isearch commands accept prefix arguments, namely
1019 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
1020 `isearch-yank-line'.
1023 *** Word search now matches whitespace at the beginning/end
1024 of the search string if it contains leading/trailing whitespace.
1025 In an incremental word search or when using a non-nil LAX argument
1026 of `word-search-regexp', the lax matching can also match part of
1027 the first word (in addition to the lax matching of the last word).
1028 The same rules are now applied to the symbol search with the difference
1029 that it matches symbols, and non-symbol characters between symbols.
1032 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
1035 ** The shell.el option `explicit-bash-args' includes --noediting by default.
1036 All non-ancient Bash versions support this option.
1038 ** Shell Script mode
1041 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
1044 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
1049 *** You can customize the SMIE indentation of a mode via `smie-config'.
1050 The command `smie-config-guess' can help you derive the appropriate
1051 indentation settings, if you provide it with an indented sample file.
1052 Use `smie-config-save' to save the result.
1055 *** You can customize the SMIE indentation of a file by adding an entry to
1056 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
1059 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
1064 *** Improved login monitoring and appropriate response to login failures.
1065 New variable `sql-login-delay' defines maximum wait time for a connection.
1068 SQL*Plus script placeholders are properly highlighted and identified
1069 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
1070 are passed before the logon parameter, as required. The default now
1071 includes `-L', to limit the number of logon attempts per invocation.
1074 ** New Term mode option `term-suppress-hard-newline'.
1077 ** Todo mode has been rewritten and enhanced.
1078 The Todo mode user manual describes all commands and most user
1079 options. To support some of these features, a new file format is
1080 used, which is incompatible with the old format; however, you can
1081 convert old todo and done item files to the new format on initializing
1082 the first new todo file, or at any later time with the provided
1083 conversion command. The previous version of todo-mode.el has been
1084 renamed to otodo-mode.el and is now obsolete. New features include:
1086 *** Support for multiple todo files and archive files of done items.
1088 *** Renaming, reordering, moving, merging, and deleting categories.
1090 *** Sortable tabular summaries of categories and the item types they contain.
1092 *** Cross-category lists of items filtered by specific criteria.
1094 *** More fine-grained interaction with the Emacs diary, by being able to
1095 decide for each todo item whether it appears in the Fancy Diary display.
1097 *** Highly flexible new item insertion and item editing.
1099 *** Moving items between categories, storing done items in their category
1100 or in archive files, undoing or unarchiving done items.
1102 *** Reprioritizing items by inputting a numerical priority.
1104 *** Extensive customizability of operation and display, including many faces.
1109 *** `trace-function' and `trace-function-background' no longer prompt for
1110 the output buffer. Unless you use a prefix argument, they output to
1114 *** With a prefix argument, `trace-function' and `trace-function-background'
1115 will prompt for a "context". This is a Lisp expression, whose value at the
1116 time the function is entered/exited is printed along with the function's
1122 *** The experimental url syntax for remote file names has been removed.
1125 *** New connection method "adb", which allows to access Android
1126 devices by the Android Debug Bridge. The variable `tramp-adb-program'
1127 can be used to adapt the path of the "adb" program, if needed.
1130 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1131 "scpc" and "rsyncc" are discontinued. The ssh option
1132 "ControlMaster=auto" is set automatically in all ssh-based methods,
1133 when possible. See `tramp-use-ssh-controlmaster-options'.
1136 *** Handlers for `file-acl' and `set-file-acl' for remote machines
1137 which support POSIX ACLs.
1140 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1141 for remote machines which support filesystem notifications.
1144 ** New URL command `url-cookie-list' displays the current cookies,
1145 and allows you to interactively remove cookies.
1147 ** VC and related modes
1150 *** In VC directory mode, `D' displays diffs between VC-controlled
1151 whole tree revisions.
1154 *** In VC directory mode, `L' lists the change log for the current VC
1155 controlled tree in a window.
1158 *** In VC directory mode, `I' shows a log of changes that will be
1159 received with a pull operation.
1162 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1163 under current version control system. When called with a prefix
1164 argument, you can remove a file from the ignored file list.
1169 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1172 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1175 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1176 are obsolete. Customize the `woman-*' faces instead.
1178 ** Obsolete packages
1181 *** iswitchb.el; use icomplete-mode.
1184 *** longlines.el; use visual-line-mode.
1193 *** terminal.el; use term.el instead.
1196 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1199 *** xesam.el (owing to the cancellation of the XESAM project).
1202 *** yow.el; use fortune.el or cookie1.el instead.
1205 * New Modes and Packages in Emacs 24.4
1208 ** New package `eww' is a built-in web browser.
1209 It is only available if Emacs is compiled with libxml2 support.
1212 ** New minor mode `superword-mode'.
1213 This overrides the default word motion commands to treat "symbol_words"
1214 as a single word, similar to what `subword-mode' does.
1217 ** New package nadvice.el offers lighter-weight advice facilities.
1220 *** add-function/remove-function, which can be used to add/remove code on any
1221 function-carrying place, such as process-filters or `<foo>-function' hooks.
1223 *** advice-add/advice-remove to add/remove a piece of advice on a named
1224 function, much like `defadvice' does.
1226 ** New package frameset.el.
1227 It provides a set of operations to save a frameset (the state of all
1228 or a subset of the existing frames and windows, somewhat similar to a
1229 frame configuration), both in-session and persistently, and restore it
1230 at some point in the future.
1233 ** New package filenotify.el provides an interface for file system
1234 notifications. It requires that Emacs be compiled with one of the
1235 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1238 * Incompatible Lisp Changes in Emacs 24.4
1241 ** `kill-region' has lost its `yank-handler' optional argument.
1244 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1245 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1248 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1251 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1252 Some languages match those as »...«, and others as «...», so it is
1253 better for Emacs to stay neutral by default.
1256 ** In compiled Lisp files, the header no longer includes a timestamp.
1259 ** The default file coding for Emacs Lisp files is now utf-8.
1260 (See `file-coding-system-alist'.) In most cases, this change is
1261 transparent, but files that contain unusual characters without
1262 specifying an explicit coding system may fail to load with obscure
1263 errors. You should either convert them to utf-8 or add an explicit
1267 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1268 It used to disable the minor mode, major mode, and text-property keymaps,
1269 whereas now it simply has higher precedence.
1272 ** Default process filters and sentinels are not nil any more.
1273 Instead they default to a function that does what the nil value used to do.
1276 ** `read-event' does not return decoded chars in ttys any more.
1277 As was the case in Emacs 22 and before, the decoding of terminal
1278 input, according to `keyboard-coding-system', is not performed in
1279 `read-event' any more. But unlike in Emacs 22, this decoding is still
1280 done before input-decode-map, function-key-map, etc.
1283 ** The option `inhibit-local-menu-bar-menus' has been removed.
1286 ** Frame-local variables that affect redisplay do not work any more.
1287 More specifically, redisplay does not bother to check for a frame-local
1288 value when looking up variables.
1291 ** nil and "unbound" are indistinguishable in `symbol-function'.
1292 `symbol-function' does not signal a `void-function' error any more.
1293 To determine if a symbol's function definition is void, use `fboundp'.
1296 ** `defadvice' does not honor the `freeze' flag and cannot advise
1297 special-forms any more.
1300 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1301 when lexical binding is enabled. Previously, VAR was bound to nil,
1302 which often led to spurious unused-variable warnings.
1305 ** The return value of `backup-buffer' has changed.
1306 The second argument is no longer an SELinux context, instead it is an
1307 alist of extended attributes as returned by the new function
1308 `file-extended-attributes'. The attributes can be applied to another
1309 file using `set-file-extended-attributes'.
1312 ** By default `copy-file' no longer copies file permission bits to an
1313 existing destination; and it sets the file permission bits of a newly
1314 created destination to those of the source, masked by the default file
1315 permissions. To copy the file permission bits, pass t as the
1316 PRESERVE-PERMISSIONS argument of `copy-file'.
1319 ** `visited-file-modtime' now returns -1 for nonexistent files.
1320 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1321 in the presence of files with negative time stamps.
1324 ** The cars of the elements in `interpreter-mode-alist' are now
1325 treated as regexps rather than literal strings.
1328 ** Overlay priority does not have to be nil or a non-negative integer.
1329 Overlay priority can be other kinds of Lisp objects. We didn't yet
1330 decide whether other types of values are stable enough, and therefore
1331 don't feel it's right to document them. For now, don't assume in your
1332 code that the values of overlay priority can only be either nil or an
1333 integer, always test them with an appropriate predicate to be one or
1337 * Lisp Changes in Emacs 24.4
1339 ** overlays-at can optionally sort its result by priority.
1342 ** The second argument of `eval' can now specify a lexical environment.
1345 ** New functions `special-form-p' and `macrop'.
1348 ** New macro `define-alternatives' can be used to define generic commands.
1349 Generic commands are interactive functions whose implementation can be
1350 selected among several alternatives, as a matter of user preference.
1353 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1354 on that symbol will use the associated value as a function to call
1358 ** New variable `enable-dir-local-variables'.
1359 Directory-local variables are ignored if this is nil. This may be
1360 useful for modes that want to ignore directory-locals while still
1361 respecting file-local variables.
1364 ** New function `get-pos-property'.
1367 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1368 as a function to call to provide default values.
1370 ** Completion changes
1373 *** The separator used by `completing-read-multiple' is now a regexp.
1374 The default `crm-separator' has been changed to allow surrounding spaces
1378 *** The `common-substring' argument of `display-completion-list',
1379 which has been documented as obsolete since Emacs 23.1, is now _really_
1380 obsolete, and no longer advertised. Instead either call
1381 `completion-hilit-commonality' to add the highlighting; or use
1382 `completion-all-completions', which returns highlighted strings.
1385 *** New function `completion-table-with-cache' is a wrapper for
1386 `completion-table-dynamic' that caches the result of the last lookup.
1389 *** New function `completion-table-merge' to combine several
1390 completion tables by merging their completions.
1393 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1394 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1395 this replaces the string "lambda" with the Greek lambda character.
1400 *** Functions to pop up menus and dialogs now work on all terminals,
1401 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1402 `message-box', `yes-or-no-p', etc.
1404 The function `display-popup-menus-p' will now return non-nil for a
1405 display or frame whenever a mouse is supported on that display or
1409 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1412 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1413 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1416 ** New hook `pre-redisplay-function'.
1419 ** New bool-vector set operation functions
1420 *** `bool-vector-exclusive-or'
1421 *** `bool-vector-union'
1422 *** `bool-vector-intersection'
1423 *** `bool-vector-set-difference'
1424 *** `bool-vector-not'
1425 *** `bool-vector-subsetp'
1426 *** `bool-vector-count-consecutive'
1427 *** `bool-vector-count-population'
1430 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1432 ** Error-handling changes
1435 *** New function `define-error'.
1438 *** `with-demoted-errors' takes an additional argument `format'.
1441 ** New macro `with-eval-after-load'.
1442 This is like the old `eval-after-load', but better behaved.
1445 ** New library subr-x.el with miscellaneous small utility functions
1446 *** `hash-table-keys'
1447 *** `hash-table-values'
1448 *** `string-blank-p'
1449 *** `string-empty-p'
1451 *** `string-reverse'
1452 *** `string-trim-left'
1453 *** `string-trim-right'
1455 *** `string-remove-prefix'
1456 *** `string-remove-suffix'
1459 ** Obsoleted functions
1462 *** `lisp-complete-symbol'
1463 *** `field-complete'
1464 *** `minibuffer-completion-contents'
1465 *** `isearch-nonincremental-exit-minibuffer'
1466 *** `isearch-filter-visible'
1467 *** `generic-make-keywords-list'
1468 *** `get-upcase-table' (use `case-table-get-table' instead).
1471 ** `with-wrapper-hook' is obsoleted by `add-function'.
1472 The few hooks that used with-wrapper-hook are replaced as follows:
1473 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1474 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1475 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1478 ** `byte-compile-interactive-only-functions' is now obsolete.
1479 To specify that a command should only be called interactively, give it
1480 a non-nil `interactive-only' property.
1483 ** `split-string' now takes an optional argument TRIM.
1484 The value, if non-nil, is a regexp that specifies what to trim from
1485 the start and end of each substring.
1488 ** New function `string-suffix-p'.
1490 ** File-handling changes
1493 *** Support for filesystem notifications.
1494 Emacs now supports notifications of filesystem changes, such as
1495 creation, modification, and deletion of files. This requires the
1496 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1497 MS-Windows systems, this is supported for Windows XP and newer
1501 *** The 9th element returned by `file-attributes' is now unspecified.
1502 Formerly, it was t if the file's gid would change if file were deleted
1503 and recreated. This value has been inaccurate for years on many
1504 platforms, and nobody seems to have noticed or cared.
1507 *** The 6th argument to `copy-file' has been renamed to
1508 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1509 Unix file permission bits as well as SELinux context.
1512 *** The function `file-ownership-preserved-p' now has an optional
1513 argument GROUP which causes it check for file group too. This can be
1514 used in place of the 9th element of `file-attributes'.
1517 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1518 argument, with the same interpretation as the returned value of
1519 `visited-file-modtime'.
1521 ** Revert and Autorevert changes
1524 *** The default values of `buffer-stale-function', `revert-buffer-function',
1525 and `revert-buffer-insert-file-contents-function' are no longer nil.
1526 Instead they default to functions that do what the nil value used to.
1529 *** `buffer-stale-function' is now used for buffers visiting files too.
1532 *** If Emacs is compiled with file notification support, it uses notifications
1533 instead of checking file time stamps. To disable this, set the user option
1534 `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1535 expression matching directories to be excluded from file notifications via
1536 `auto-revert-notify-exclude-dir-regexp'.
1539 *** The new user option `auto-revert-remote-files' enables reversion
1540 of remote files, if set to non-nil.
1545 *** The function `face-spec-set' is now like `setq' for face specs.
1546 Its third arg now accepts values specifying a face spec type (defface,
1547 custom, or override spec), and the relevant spec is set accordingly.
1550 *** New function `add-face-text-property', which can be used to
1551 conveniently prepend/append new face properties.
1554 *** Face specs set via Custom themes now replace the `defface' spec
1555 rather than inheriting from it. In other words, setting a face via a
1556 theme now behaves like setting it via Customize: you only need to
1557 specify the attributes that you want, you don't need to unset those
1558 that you don't want.
1561 *** New face characteristic (supports :underline (:style wave))
1562 specifies whether or not the terminal can display a wavy line.
1565 *** New face spec attribute :distant-foreground
1566 specifies foreground to use if background color is near the foreground
1567 color that would otherwise have been used.
1572 *** `image-animated-p' is now `image-multi-frame-p'.
1573 It returns non-nil for any image that contains multiple frames,
1574 whether or not it specifies a frame delay.
1577 *** New variable `image-default-frame-delay' gives the frame delay for
1578 animated images which do not specify a frame delay.
1581 *** New functions `image-current-frame' and `image-show-frame' for getting
1582 and setting the current frame of a multi-frame image.
1587 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1588 **** object-name -> eieio-object-name
1589 **** object-class -> eieio-object-class
1590 **** object-class-fast -> eieio--object-class
1591 **** object-class-name -> eieio-object-class-name
1592 **** object-name-string -> eieio-object-name-string
1593 **** object-num-slots -> eieio--object-num-slots
1594 **** object-set-name-string -> eieio-object-set-name-string
1595 **** class-of -> eieio-object-class
1596 **** class-name -> eieio-class-name
1597 **** class-parent -> eieio-class-parent
1598 **** class-parents -> eieio-class-parents
1599 **** class-parents-fast -> eieio-class-parents-fast
1600 **** class-children -> eieio-class-children
1601 **** class-num-slots -> eieio--class-num-slots
1602 **** class-precedence-list -> eieio-class-precedence-list
1603 **** class-direct-subclasses -> eieio-class-children
1604 **** class-direct-superclasses -> eieio-class-parents
1606 ** Changes in encoding and decoding of text
1609 *** New coding-system `prefer-utf-8'.
1610 This is like `undecided' but prefers UTF-8 on decoding if the text to
1611 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1612 any non-ASCII characters are automatically encoded as UTF-8.
1615 *** New attributes of coding-systems whose type is `undecided'.
1616 Two new attributes, `:inhibit-null-byte-detection' and
1617 `:inhibit-iso-escape-detection', determine how to detect encoding of
1618 text that includes null bytes and ISO-2022 escape sequences,
1619 respectively. Each of these attributes can be either nil, zero, or
1620 t. If it is t, decoding text ignores null bytes and, respectively,
1621 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1622 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1623 text is encoded in one of the ISO-2022 encodings, such as
1624 iso-2022-7bit. If the value is zero, Emacs consults the variables
1625 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1627 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1628 UTF-8 encoding and decoding, whenever possible.
1630 These attributes are only meaningful for coding-systems of type
1631 `undecided'. (The type of a coding-system is determined by its
1632 `:coding-type' attribute and can be accessed by calling the
1633 `coding-system-type' function.)
1636 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1639 ** New functions `group-gid' and `group-real-gid'.
1642 ** The spelling of the rx.el category `chinese-two-byte' has been
1643 corrected (the first 'e' was missing).
1646 ** Minor internal changes to the details of lock files.
1647 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1648 If DIR/.#FILE already exists and is not an Emacs lock file,
1649 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1650 numbered lock files DIR/.#FILE.0...).
1651 On file systems that do not support symbolic links, the lock is now a
1652 regular file with contents being what would have been in the symlink.
1654 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1657 *** The package descriptor and name of global variables, constants,
1658 and functions should be separated by two hyphens if the symbol is not
1659 meant to be used by other packages.
1662 * Changes in Emacs 24.4 on Non-Free Operating Systems
1665 ** The procedure for building Emacs on MS-Windows has changed.
1666 It is now built by running the same configure script as on all other
1667 platforms. This requires the MSYS environment and MinGW development
1668 tools. See the updated instructions in nt/INSTALL for details.
1670 Using the Posix configure script and Makefile's also means a change in
1671 the directory structure of the Emacs installation on Windows. It is
1672 now the same as on GNU and Unix systems. In particular, the auxiliary
1673 programs, such as cmdproxy.exe and hexl.exe, are in
1674 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1675 version), version-independent site-lisp is in share/emacs/site-lisp,
1676 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1677 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1678 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1679 directories and will find the files in there automatically; there's no
1680 need to set any variables due to this change.)
1683 ** Emacs on Windows 2000 and later can now access files and directories
1684 whose names cannot be encoded in the current system codepage.
1686 The new variable `w32-unicode-filenames' controls this feature: if it
1687 is t, Emacs uses Unicode APIs to pass file names to system calls,
1688 which lifts the limitation of file names to the current locale.
1691 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1692 The backtrace is written to the 'emacs_backtrace.txt' file in the
1693 directory where Emacs was running.
1696 ** The variable `buffer-file-type' is no longer supported.
1697 Setting it has no effect, and %t in the mode-line format is ignored.
1698 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1699 modifying it has no effect.
1702 ** Lock files now work on MS-Windows.
1703 This helps to prevent losing your edits if the same file is being
1704 edited in another Emacs session or by another user. See the node
1705 "Interlocking" in the Emacs User Manual for the details. To disable
1706 file locking, customize `create-lockfiles' to nil.
1708 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1709 GNUstep and Mac OS X 10.4 use the old font backend.
1710 To use the old backend by default, do on the command line:
1711 % defaults write org.gnu.Emacs FontBackend ns
1713 ** Improved fullscreen support on Mac OS X.
1714 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1715 Customize `ns-use-native-fullscreen' to change the style.
1716 For Mac OS X 10.7 and newer, native is the default.
1718 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1719 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1720 does not apply to images.
1723 * Installation Changes in Emacs 24.3
1725 ** The default X toolkit is now Gtk+ version 3.
1726 If you don't pass `--with-x-toolkit' to configure, or if you use
1727 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1728 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1729 You can explicitly require a specific version by passing
1730 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1732 ** New configure option `--enable-link-time-optimization', to utilize
1733 an appropriate feature provided by GCC since version 4.5.0.
1735 ** New configure option `--without-all' to disable most of the optional
1736 features (image support, etc.) that are normally enabled by default.
1738 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1739 Emacs). If building with GCC, this enables compile-time checks that
1740 warn/give errors about possibly-questionable C code. On a recent GNU
1741 system there should be no warnings; on older and on non-GNU systems
1742 the results may be useful to developers.
1744 ** The configure option `--enable-use-lisp-union-type' has been
1745 renamed to `--enable-check-lisp-object-type', as the resulting
1746 Lisp_Object type no longer uses a union to implement the compile time
1747 check that this option enables.
1749 ** The configure option `--disable-maintainer-mode' has been removed,
1750 as it was confusingly-named and rarely useful.
1752 ** The configure options `--program-prefix', `--program-suffix', and
1753 `--program-transform-name' apply to more than just the installed
1754 binaries. Now they also affect the man pages, icons, and the
1755 etc/emacs.desktop file; but not the info pages, since this would break
1756 links between the various manuals.
1758 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1759 overwriting "emacs" in the installation bin/ directory with a link
1762 ** Emacs uses libtinfo in preference to libncurses, if available.
1764 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1765 /usr/pkg/lib to the linker search path. You must add them yourself if
1768 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1769 (from the bin and libexec directories, respectively). The former is
1770 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1773 * Startup Changes in Emacs 24.3
1775 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1776 lisp/ directory. There should not be any there anyway. If you have
1777 been adding them there, put them somewhere else; e.g., site-lisp.
1779 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1782 * Changes in Emacs 24.3
1786 *** `C-h f' (`describe-function') can now perform autoloading.
1787 When this command is called for an autoloaded function whose docstring
1788 contains a key substitution construct, that function's library is
1789 automatically loaded, so that the documentation can be shown
1790 correctly. To disable this, set `help-enable-auto-load' to nil.
1792 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1793 even after their associated libraries have been loaded (and the
1794 autoloads have been redefined as functions).
1798 *** Images displayed via ImageMagick now support transparency and the
1799 :background image specification property.
1801 *** When available, ImageMagick support is automatically enabled.
1802 It is no longer necessary to call `imagemagick-register-types'
1803 explicitly to install ImageMagick image types; that function is called
1804 automatically at startup, or when customizing an imagemagick- option.
1806 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1807 ImageMagick to view images. (You must call `imagemagick-register-types'
1808 afterwards if you do not use customize to change this.)
1810 *** The new variable `imagemagick-enabled-types' also affects which
1811 ImageMagick types are treated as images. The function
1812 `imagemagick-filter-types' returns the list of types that will be
1817 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1818 next and previous path separator, respectively.
1820 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1821 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1822 non-nil before enabling the mode.
1826 *** New option `mode-line-default-help-echo' specifies the help text
1827 (shown in a tooltip or in the echo area) for any part of the mode line
1828 that does not have its own specialized help text.
1830 *** You can now click mouse-3 in the coding system indicator to invoke
1831 `set-buffer-file-coding-system'.
1833 ** Server and client
1835 *** emacsclient now obeys string values for `initial-buffer-choice',
1836 if it is told to open a new frame without specifying any file to visit
1837 or expression to evaluate.
1839 *** New option `server-auth-key' specifies a shared server key.
1841 ** Emacs now generates backtraces on fatal errors.
1842 On encountering a fatal error, Emacs now outputs a textual description
1843 of the fatal signal, and a short backtrace on platforms like glibc
1844 that support backtraces.
1846 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1847 This minor mode replaces `toggle-read-only', which is now obsolete.
1849 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1850 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1851 respectively, without exiting from the prompt.
1853 ** In the Package Menu, newly-available packages are listed as "new",
1854 and sorted above the other "available" packages by default.
1856 ** If your Emacs was built from a repository checkout, the new variable
1857 `emacs-bzr-version' contains information about the bzr revision used.
1859 ** New option `create-lockfiles' specifies usage of lockfiles.
1860 It defaults to t. Changing it to nil inhibits the creation of lock
1861 files (use this with caution).
1863 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1864 variables on remote hosts.
1866 ** The entry for PCL-CVS has been removed from the Tools menu.
1867 The PCL-CVS commands are still available via the keyboard.
1869 ** Using "unibyte: t" in Lisp source files is obsolete.
1870 Use "coding: raw-text" instead.
1872 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1873 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1874 The previous binding, introduced in Emacs 24.1, was a mistake, because
1875 `C-c LETTER' bindings are reserved for user customizations.
1877 ** Internationalization
1879 *** New language environment: Persian.
1881 *** New input method `vietnamese-vni'.
1883 ** Nextstep (GNUstep / Mac OS X) port
1885 *** Support for fullscreen and the frame parameter fullscreen.
1887 *** A file dialog is used for open/save operations initiated from the
1891 * Editing Changes in Emacs 24.3
1893 ** Search and Replace
1895 *** Non-regexp Isearch now performs "lax" space matching.
1896 Each sequence of spaces in the supplied search string may match any
1897 sequence of one or more whitespace characters, as specified by the
1898 variable `search-whitespace-regexp'. (This variable is also used by a
1899 similar existing feature for regexp Isearch.)
1901 *** New Isearch command `M-s SPC' toggles lax space matching.
1902 This applies to both ordinary and regexp Isearch.
1904 *** New option `replace-lax-whitespace'.
1905 If non-nil, `query-replace' uses flexible whitespace matching too.
1908 *** Global `M-s _' starts a symbol (identifier) incremental search,
1909 and `M-s _' in Isearch toggles symbol search mode.
1910 `M-s c' in Isearch toggles search case-sensitivity.
1912 ** Navigation commands
1914 *** New binding `M-g c' for `goto-char'.
1916 *** New binding `M-g TAB' for `move-to-column'.
1918 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1919 interactively with no prefix arg. Previously, it moved to column 1.
1921 ** New option `yank-handled-properties' allows processing of text
1922 properties on yanked text, in ways that are more general than just
1923 removing them (as is done by `yank-excluded-properties').
1925 ** New option `delete-trailing-lines' specifies whether
1926 M-x delete-trailing-whitespace should delete trailing lines at the end
1927 of the buffer. It defaults to t.
1929 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1931 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1932 `ucs-insert' is now an obsolete alias for `insert-char'.
1934 ** The `z' key no longer has a binding in most special modes.
1935 It used to be bound to `kill-this-buffer', but `z' is too easy to
1938 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1939 It copies the region-rectangle as the last rectangle kill.
1943 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1945 *** New option `register-separator' specifies the register containing
1946 the text to put between collected texts for use with
1947 M-x append-to-register and M-x prepend-to-register.
1950 * Changes in Specialized Modes and Packages in Emacs 24.3
1952 ** Common Lisp emulation (CL)
1954 *** CL's main entry is now (require 'cl-lib).
1955 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1956 i.e., all its definitions have the "cl-" prefix (and internal definitions
1957 use the "cl--" prefix).
1959 If `cl' provided a feature under the name `foo', then `cl-lib'
1960 provides it under the name `cl-foo' instead; with the exceptions of the
1961 few `cl' definitions that had to use `foo*' to avoid conflicts with
1962 pre-existing Elisp entities. These have been renamed to `cl-foo'
1963 rather than `cl-foo*'.
1965 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1966 provide the old, non-prefixed names. Some exceptions are listed below:
1968 *** `cl-flet' is not like `flet' (which is deprecated).
1969 Instead it obeys the behavior of Common-Lisp's `flet'.
1970 In particular, in cl-flet function definitions are lexically scoped,
1971 whereas in flet the scoping is dynamic.
1973 *** `cl-labels' is slightly different from `labels'.
1974 The difference is that it relies on the `lexical-binding' machinery
1975 (as opposed to the `lexical-let' machinery used previously) to capture
1976 definitions in closures, so such closures will only work if `lexical-binding'
1979 *** `cl-letf' is not exactly like `letf'.
1980 The only difference is in details that relate to some deprecated usage
1981 of `symbol-function' in place forms.
1983 *** `progv' was rewritten to use the `let' machinery.
1984 A side effect is that variables without corresponding values are bound
1985 to nil rather than being made unbound.
1987 *** The following methods of extending `setf' are obsolete
1988 (use features from gv.el instead):
1989 `define-modify-macro' (use `gv-letplace')
1990 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1991 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1992 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1996 *** Changes are now highlighted using the same color scheme as in
1997 modern VCSes. Deletions are displayed in red (new faces
1998 `diff-refine-removed' and `smerge-refined-removed', and new definition
1999 of `diff-removed'), insertions in green (new faces `diff-refine-added'
2000 and `smerge-refined-added', and new definition of `diff-added').
2002 *** The variable `diff-use-changed-face' defines whether to use the
2003 face `diff-changed', or `diff-removed' and `diff-added' to highlight
2004 changes in context diffs.
2006 *** The new command `diff-delete-trailing-whitespace' removes trailing
2007 whitespace introduced by a diff.
2009 ** Ediff now uses the same color scheme as Diff mode.
2013 A new version of python.el, which provides several new features, including:
2014 per-buffer shells, better indentation, Python 3 support, and improved
2015 shell-interaction compatible with iPython (and virtually any other
2018 *** Some user options have been replaced/renamed, including (old -> new):
2019 **** python-indent -> python-indent-offset
2020 **** python-guess-indent -> python-indent-guess-indent-offset
2021 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
2022 **** python-use-skeletons -> python-skeleton-autoinsert
2024 *** Some user options have been removed, including:
2026 **** `python-indent-string-contents': Strings are never indented.
2028 **** `python-honour-comment-indentation':
2029 Comments are always considered as indentation markers.
2031 **** `python-continuation-offset': Indentation is automatically
2032 calculated in a pep8 compliant way depending on the context.
2034 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
2035 Have no direct mapping as the shell interaction is completely different.
2037 **** `python-python-command', `python-jython-command':
2038 Replaced by `python-shell-interpreter'.
2040 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
2041 `python-pdbtrack-minor-mode-string', `python-source-modes':
2044 *** Some commands have been replaced (old -> new):
2045 **** python-insert-class -> python-skeleton-class
2046 **** python-insert-def -> python-skeleton-def
2047 **** python-insert-for -> python-skeleton-for
2048 **** python-insert-if -> python-skeleton-if
2049 **** python-insert-try/except -> python-skeleton-try
2050 **** python-insert-try/finally -> python-skeleton-try
2051 **** python-insert-while -> python-skeleton-while
2052 **** python-find-function -> python-nav-jump-to-defun
2053 **** python-next-statement -> python-nav-forward-sentence
2054 **** python-previous-statement -> python-nav-backward-sentence
2055 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
2056 **** python-end-of-defun-function -> python-nav-end-of-defun
2057 **** python-send-buffer -> python-shell-send-buffer
2058 **** python-send-defun -> python-shell-send-defun
2059 **** python-send-region -> python-shell-send-region
2060 **** python-send-region-and-go -> emulate with python-shell-send-region
2061 and python-shell-switch-to-shell
2062 **** python-send-string -> python-shell-send-string
2063 **** python-switch-to-python -> python-shell-switch-to-shell
2064 **** python-describe-symbol -> python-eldoc-at-point
2068 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
2070 *** The D-Bus object manager interface is implemented.
2072 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
2073 if their value does not fit into Emacs's integer range.
2075 *** The function `dbus-call-method' is now non-blocking.
2076 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
2078 *** Signals can also be sent as unicast messages.
2080 *** The argument list of `dbus-register-signal' has been extended,
2081 according to the new match rule types of D-Bus.
2083 *** `dbus-init-bus' supports private connections.
2085 *** There is a new function `dbus-setenv'.
2087 ** `desktop-path' no longer includes the "." directory.
2088 Desktop files are now located in ~/.emacs.d by default.
2092 *** `dired-do-async-shell-command' executes each file sequentially
2093 if the command ends in `;' (when operating on multiple files).
2094 Otherwise, it executes the command on each file in parallel.
2096 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
2097 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
2100 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
2101 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
2102 mark/unmark/flag all files in the active region.
2104 *** The minibuffer default for `=' (`dired-diff') has changed.
2105 It is now the backup file for the file at point, if one exists.
2106 In Transient Mark mode the default is the file at the active mark.
2108 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2109 The global binding for `M-=', `count-words-region' is in effect.
2113 *** New module "notifications", which can send a notification when you
2114 receive a private message or your nickname is mentioned.
2116 *** ERC will look up server/channel names via auth-source and use any
2119 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2120 only applies to messages sent by lurkers.
2122 ** reStructuredText mode
2124 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2125 fontification, comment handling, and customization have all been revised
2128 *** Support for `imenu' and `which-function-mode'.
2130 *** The reStructuredText syntax is more closely covered.
2131 Sphinx support has been improved.
2133 *** `rst-insert-list' inserts new list or continues existing lists.
2135 *** A negative prefix argument always works for `rst-adjust'.
2137 *** The window configuration is reset after displaying a TOC.
2139 *** The constant `rst-version' describes the rst.el package version.
2143 *** Support for percent literals and recognition of regular expressions
2144 in method calls without parentheses with more methods, including Cucumber
2147 *** Improved syntax highlighting and indentation.
2149 *** New command `ruby-toggle-block', bound to `C-c {'.
2151 *** Some non-standard keybindings/commands have been removed:
2153 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
2155 **** `ruby-mark-defun'; use `mark-defun'.
2157 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2158 appropriate settings for the variables `beginning-of-defun-function'
2159 and `end-of-defun-function'.
2161 **** Non-standard keybindings for `backward-kill-word', `comment-region',
2162 `reindent-then-newline-and-indent' and `newline' have been removed.
2164 ** Shell Script mode
2166 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2168 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2170 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2174 *** The free software compiler GHDL is supported (and now the default).
2176 *** Support for the VHDL-AMS packages has been added/updated.
2178 *** Updated to the 2002 revision of the VHDL standard.
2180 *** Accepts \r and \f as whitespace.
2184 *** The faces used by Apropos are now directly customizable.
2185 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2186 see the `apropos' Custom group for details.
2188 *** The old options whose values specified faces to use have been removed
2189 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2190 `apropos-match-face' and `apropos-property-face'.).
2194 *** This package has been rewritten to use Tabulated List mode.
2196 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2197 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2201 *** Algebraic simplification mode is now the default.
2202 To restrict to the limited simplifications given by the former
2203 default simplification mode, use `m I'.
2207 *** You can customize the header text that appears above each calendar month.
2208 See the variable `calendar-month-header'.
2210 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2212 *** The calendars produced by cal-html include holidays.
2213 Customize `cal-html-holidays' to change this.
2217 *** The major modes from the parser generators "Bovine" and "Wisent"
2218 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2219 are in `auto-mode-alist', and the corresponding manuals are included.
2223 **** Menu support for the "Configuration" feature. This allows users to
2224 choose the active configuration (such as debug or install) from the menu.
2226 **** New command `ede-set' to interactively set project-local variables.
2228 **** Support for compiling, debugging, and running in "generic" projects.
2230 **** Autoconf editing support for M4 macros with complex arguments.
2232 **** Compilation support for the "linux" project type.
2234 **** "simple" projects have been removed; use "generic" projects instead.
2238 **** Support for parsing #include statements inside a namespace in C/C++.
2240 **** Improved support for 'extern "C"' declarations in C/C++.
2242 **** The ability to ignore more common special C/C++ preprocessor symbols,
2243 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2244 If available, include cdefs.h as an additional source of preprocessor symbols.
2246 **** Improved C/C++ function pointer parsing.
2248 **** In Python, support for converting imports to include file names.
2250 **** Ability to dynamically determine the Python load path.
2252 **** Support for the Python 'WITH' and 'AT' keywords.
2254 **** Improved tooltip completion.
2258 **** The SRecode manual is now included.
2260 **** Tag generation supports constructor/destructor settings and system
2261 include differentiation.
2263 **** Addition of 'Framework' support: Frameworks are specified when a
2264 particular kind of library (such as Android) is needed in a common language
2267 **** Support for nested templates and let variables override based on priority.
2269 **** Support for merging tables from multiple related modes, such as
2270 default -> c++ -> arduino.
2272 ** Compile has a new option `compilation-always-kill'.
2276 *** `custom-reset-button-menu' now defaults to t.
2278 *** Non-option variables are never matched in `customize-apropos' and
2279 `customize-apropos-options' (i.e., the prefix argument does nothing for
2280 these commands now).
2284 *** The variables `term-default-fg-color' and `term-default-bg-color'
2285 are now deprecated in favor of the customizable face `term'.
2287 *** You can customize how to display ANSI terminal colors and styles
2288 by customizing the corresponding `term-color-<COLOR>',
2289 `term-color-underline' and `term-color-bold' faces.
2293 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2295 *** Remote processes are now also supported on remote MS-Windows hosts.
2299 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2300 Previously, this slot stored semicolon-separated attribute-value pairs
2301 appended to some imap URLs, but this is not compatible with RFC 3986.
2302 So now the `filename' slot stores the entire path and query components,
2303 and the `attributes' slot is always nil.
2305 *** New function `url-encode-url' for encoding a URI string.
2306 The `url-retrieve' function now uses this to encode its URL argument,
2307 in case that is not properly encoded.
2309 ** notifications.el supports now version 1.2 of the Notifications API.
2310 The function `notifications-get-capabilities' returns the supported
2313 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2314 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2315 `flymake-warning-bitmap'.
2317 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2318 specifying URL types that should be converted to remote file names at
2319 the FFAP prompt. The default is now '("ftp").
2321 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2322 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2324 ** New option `mouse-avoidance-banish-position' specifies where the
2325 `banish' mouse avoidance setting moves the mouse.
2327 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2328 closing brackets to be aligned with the line of the opening bracket.
2330 ** In Proced mode, new command `proced-renice' renices marked processes.
2332 ** New option `async-shell-command-buffer' specifies the buffer to use
2333 for a new asynchronous `shell-command' when the default output buffer
2334 `*Async Shell Command*' is already in use.
2336 ** SQL mode has a new option `sql-db2-escape-newlines'.
2337 If non-nil, newlines sent to the command interpreter will be escaped
2338 by a backslash. The default does not escape the newlines and assumes
2339 that the sql statement will be terminated by a semicolon.
2341 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2342 (and modes that derive from it), sorts the column at point, or the Nth
2343 column if a numeric prefix argument is given.
2345 ** `which-func-modes' now defaults to t, so Which Function mode, when
2346 enabled, applies to all applicable major modes.
2348 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2351 ** Follow mode no longer works by using advice.
2352 The option `follow-intercept-processes' has been removed.
2354 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2356 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2357 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2358 *** semantic-change-hooks -> semantic-change-functions
2359 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2360 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2361 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2362 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2363 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2364 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2365 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2366 *** rcirc-activity-hooks -> rcirc-activity-functions
2367 *** rcirc-print-hooks -> rcirc-print-functions
2368 *** dbus-event-error-hooks -> dbus-event-error-functions
2369 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2370 *** checkdoc-style-hooks -> checkdoc-style-functions
2371 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2372 *** archive-extract-hooks -> archive-extract-hook
2373 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2374 *** hfy-post-html-hooks -> hfy-post-html-hook
2375 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2376 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2377 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2378 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2380 ** Obsolete packages
2383 In most cases, assoc+member+push+delq work just as well.
2384 And in any case it's just a terrible package: ugly semantics, terrible
2385 inefficiency, and not namespace-clean.
2394 * Incompatible Lisp Changes in Emacs 24.3
2396 ** Docstrings starting with `*' no longer indicate user options.
2397 Only variables defined using `defcustom' are considered user options.
2398 The function `user-variable-p' is now an obsolete alias for
2399 `custom-variable-p'.
2401 ** The return values of `defalias', `defun' and `defmacro' have changed,
2402 and are now undefined. For backwards compatibility, `defun' and
2403 `defmacro' currently return the name of the newly defined
2404 function/macro, but this should not be relied upon.
2406 ** `random' by default now returns a different random sequence in
2407 every Emacs run. Use `(random S)', where S is a string, to set the
2408 random seed to a value based on S, in order to get a repeatable
2409 sequence in later calls.
2411 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2412 that substring is inserted literally even if the LITERAL arg is
2413 non-nil, instead of causing an error to be signaled.
2415 ** `select-window' now always makes the window's buffer current.
2416 It does so even if the window was selected before.
2418 ** The function `x-select-font' can return a font spec, instead of a
2419 font name as a string. Whether it returns a font spec or a font name
2420 depends on the graphical library.
2422 ** `face-spec-set' no longer sets frame-specific attributes when the
2423 third argument is a frame (that usage was obsolete since Emacs 22.2).
2425 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2427 ** The CL package's `get-setf-method' function no longer exists.
2428 Generalized variables are now part of core Emacs Lisp, and implemented
2429 differently to the way cl.el used to do it. It is not possible to
2430 define a compatible replacement for `get-setf-method'. See the file
2431 gv.el for internal details of the new implementation.
2433 ** The arguments of `dbus-register-signal' are no longer just strings,
2434 but keywords or keyword-string pairs. The old argument list will
2435 still be supported for Emacs 24.x.
2437 ** Miscellaneous name changes
2438 Some Lisp symbols have been renamed to correct their spelling,
2439 or to be more consistent with standard Emacs terminology.
2441 *** Renamed functions
2442 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2443 **** inactivate-input-method -> deactivate-input-method
2444 **** quail-inactivate -> quail-deactivate
2445 **** robin-inactivate -> robin-deactivate
2446 **** viper-inactivate-input-method -> viper-deactivate-input-method
2447 **** viper-inactivate-input-method-action ->
2448 viper-deactivate-input-method-action
2449 **** ucs-input-inactivate -> ucs-input-deactivate
2452 The old hooks are still supported for backward compatibility, but they
2453 are deprecated and will be removed eventually.
2454 **** input-method-inactivate-hook -> input-method-deactivate-hook
2455 **** robin-inactivate-hook -> robin-deactivate-hook
2456 **** quail-inactivate-hook -> quail-deactivate-hook
2458 *** Renamed variables
2459 **** follow-deactive-menu -> follow-inactive-menu
2460 **** inactivate-current-input-method-function ->
2461 deactivate-current-input-method-function
2463 ** Some obsolete functions, variables, and faces have been removed:
2464 *** `last-input-char', `last-command-char', `unread-command-char'
2465 *** `facemenu-unlisted-faces'
2466 *** `rmail-decode-mime-charset'
2467 *** `iswitchb-read-buffer'
2468 *** `sc-version', `sc-submit-bug-report'
2469 *** `set-char-table-default'
2470 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2471 *** `compile-internal'
2473 *** `mode-line-inverse-video'
2474 *** `follow-mode-off-hook'
2475 *** `cvs-commit-buffer-require-final-newline'
2476 (use `log-edit-require-final-newline' instead)
2477 *** `cvs-changelog-full-paragraphs'
2478 (use `log-edit-changelog-full-paragraphs' instead)
2479 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2480 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2481 *** `vc-master-templates' (use `vc-handled-backends' instead)
2482 *** `vc-checkout-carefully'
2485 * Lisp Changes in Emacs 24.3
2487 ** CL-style generalized variables are now in core Elisp.
2488 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2489 You can define your own generalized variables using `gv-define-simple-setter',
2490 `gv-define-setter', etc.
2492 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2493 This can significantly speed up execution of non-byte-compiled code,
2494 but can also bump into previously unnoticed cyclic dependencies.
2495 These are generally harmless: they will simply cause the macro calls
2496 to be left for later expansion (as before), but will result in a
2497 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2498 You may wish to restructure your code so this does not happen.
2500 ** New sampling-based Elisp profiler.
2501 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2502 When finished, use M-x profiler-stop. The sampling rate can be based on
2503 CPU time or memory allocations.
2505 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2506 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2508 ** New macros `setq-local' and `defvar-local'.
2510 ** Face underlining can now use a wave.
2512 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2513 of `read-regexp' accepts a string ending with a colon and space, and its
2514 second argument DEFAULTS can be a list of strings accessible via `M-n'
2515 in the minibuffer ahead of other hard-coded useful regexp-related values.
2516 More commands use `read-regexp' now to read their regexp arguments.
2520 *** New function `completion-table-with-quoting' to handle completion
2521 in the presence of quoting, such as file completion in shell buffers.
2523 *** New function `completion-table-subvert' to use an existing completion
2524 table, but with a different prefix.
2528 *** New error type and new function `user-error'.
2529 These do not trigger the debugger.
2531 *** New option `debugger-bury-or-kill', saying what to do with the
2532 debugger buffer when exiting debug.
2534 *** Set `debug-on-message' to enter the debugger when a certain
2535 message is displayed in the echo area. This can be useful when trying
2536 to work out which code is doing something.
2538 *** New var `inhibit-debugger', automatically set to prevent accidental
2539 recursive invocations.
2543 *** New command `fit-frame-to-buffer' adjusts the frame height to
2546 *** The command `fit-window-to-buffer' can adjust the frame height
2547 if the new option `fit-frame-to-buffer' is non-nil.
2549 *** New macro `with-temp-buffer-window', similar to
2550 `with-output-to-temp-buffer'.
2552 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2555 *** New option `switch-to-buffer-preserve-window-point' to restore a
2556 window's point when switching buffers.
2558 *** New display action alist entries `window-height' and `window-width'
2559 specify the size of new windows created by `display-buffer'.
2561 *** New display action alist entry `pop-up-frame-parameters', if
2562 non-nil, specifies frame parameters to give any newly-created frame.
2564 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2565 tells display action functions to avoid changing which frame is
2568 *** New display action alist entry `previous-window', if non-nil,
2569 specifies window to reuse in `display-buffer-in-previous-window'.
2571 *** New display action functions `display-buffer-below-selected',
2572 and `display-buffer-in-previous-window'.
2574 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2575 now accept a third argument to avoid choosing the selected window.
2577 *** Additional values recognized for option `window-combination-limit'.
2579 *** The following variables are obsolete, as they can be replaced by
2580 appropriate entries in the `display-buffer-alist' function introduced
2582 **** `dired-shrink-to-fit'
2583 **** `display-buffer-reuse-frames'
2584 **** `display-buffer-function'
2585 **** `special-display-buffer-names'
2586 **** `special-display-frame-alist'
2587 **** `special-display-function'
2588 **** `special-display-regexps'
2592 *** `current-time-string' no longer requires that its argument's year
2593 must be in the range 1000..9999. It now works with any year supported
2594 by the underlying C implementation.
2596 *** `current-time' now returns extended-format time stamps
2597 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2598 PSEC is typically a multiple of 1000 on current machines. Other
2599 functions that use this format, such as `file-attributes' and
2600 `format-time-string', have been changed accordingly. Old-format time
2601 stamps are still accepted.
2603 *** The format of timers in `timer-list' and `timer-idle-list' is now
2604 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2605 The PSECS slot is new, and uses picosecond resolution. It can be
2606 accessed via the new `timer--psecs' accessor.
2608 *** Last-modified time stamps in undo lists now are of the form
2609 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2613 *** Improved security when handling persistent objects:
2615 **** `eieio-persistent-read' now features optional arguments for specifying
2616 the class to load, as well as a flag stating whether subclasses are allowed;
2617 if provided, other classes will be rejected by the reader. For
2618 compatibility with existing code, if the class is omitted only a
2621 **** New specialized reader for pulling in classes and signaling errors
2622 without evaluation of suspicious code.
2624 **** All slots that contain objects must have a :type. Slots with lists
2625 of objects must use a new type predicate for a list of an object type.
2627 *** Support for `find-function' and similar utilities, through the addition
2628 of filename support to generated symbols.
2630 ** Floating point functions now always return special values like NaN,
2631 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2632 Previously, they returned NaNs on some platforms but signaled errors
2633 on others. The affected functions are acos, asin, tan, exp, expt,
2634 log, log10, sqrt, and mod.
2636 ** New fringe bitmap `exclamation-mark'.
2638 ** Miscellaneous changes to special forms and macros
2640 *** `defun' and `defmacro' are now macros rather than special forms.
2642 *** `kbd' is now a function rather than a macro.
2644 ** Miscellaneous new functions
2646 *** `set-temporary-overlay-map' sets up a temporary keymap that
2647 takes precedence over most other maps for a short while (normally one key).
2649 *** `autoloadp' tests if its argument is an autoloaded object.
2651 *** `autoload-do-load' performs the autoloading operation.
2653 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2655 *** `file-name-base' returns a file name sans directory and extension.
2657 *** `function-get' fetches a function property, following aliases.
2659 *** `posnp' tests if an object is a `posn'.
2661 *** `system-users' returns the user names on the system.
2663 *** `system-groups' returns the group names on the system.
2665 *** `tty-top-frame' returns the topmost frame of a text terminal.
2667 ** The following functions and variables are obsolete:
2668 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2669 *** `buffer-has-markers-at'
2670 *** `macro-declaration-function' (use `macro-declarations-alist')
2671 *** `window-system-version' (provides no useful information)
2672 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2673 *** `query-replace-interactive'
2674 *** `font-list-limit' (has had no effect since Emacs < 23)
2677 * Changes in Emacs 24.3 on Non-Free Operating Systems
2679 ** Cygwin builds can use the native MS Windows user interface.
2680 Pass `--with-w32' to configure. The default remains the X11 interface.
2682 ** Two new functions are available in Cygwin builds:
2683 `cygwin-convert-file-name-from-windows' and
2684 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2685 code to access the Cygwin file-name mapping machinery to convert
2686 between Cygwin and Windows-native file and directory names.
2688 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2689 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2690 `mouse-autoselect-window'.
2692 ** On MS Windows Vista and later Emacs now supports symbolic links.
2694 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2695 support for libxml2, even if its presence is detected.
2697 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2699 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2700 directories to the search path. You must add them yourself if you want them.
2703 * Changes in Emacs 24.2
2705 ** This is mainly a bug-fix release.
2708 * Installation Changes in Emacs 24.1
2710 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2711 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2712 also depend on Gtk+. You can disable them with --without-rsvg and
2715 ** Emacs can be compiled with GnuTLS support.
2716 This happens by default if a suitably recent version of the library is
2717 found at build time. To prevent this, use the configure option
2718 `--without-gnutls'. See below for GnuTLS features.
2720 ** Emacs can be compiled with SELinux support.
2721 This happens by default if a suitably recent version of the library is
2722 found at build time. To prevent this, use the configure option
2723 `--without-selinux'. See below for SELinux features.
2725 ** Emacs can be compiled with ImageMagick support.
2726 This happens by default if a suitably recent version of the library is
2727 found at build time. To prevent this, use the configure option
2728 `--without-imagemagick'. See below for ImageMagick features.
2729 This feature is not available for the Nextstep or MS ports.
2731 ** Emacs can be compiled with libxml2 support.
2732 This happens by default if a suitably recent version of the library is
2733 found at build time. To prevent this, use the configure option
2734 `--without-xml2'. See below for libxml2 features.
2736 ** By default, the installed Info and man pages are compressed.
2737 You can disable this by configuring --without-compress-info.
2739 ** New configure option --with-wide-int.
2740 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2741 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2744 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2745 These provide no new functionality, they just remove the need to edit
2746 lib-src/Makefile by hand in order to use the associated features.
2748 ** New configure option --enable-use-lisp-union-type.
2749 This is only useful for Emacs developers to debug certain types of bugs.
2750 This is not a new feature; only the configure flag is new.
2752 ** The standalone programs digest-doc and sorted-doc are removed.
2753 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2755 ** The standalone program `fakemail' is removed.
2756 If you need it, feedmail.el provides a superset of the functionality.
2759 * Startup Changes in Emacs 24.1
2761 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2762 command line arguments, and the EMACS_UNIBYTE environment variable, no
2763 longer have any effect. (They were declared obsolete in Emacs 23.)
2765 ** New command line option `--no-site-lisp' removes site-lisp directories
2766 from load-path. -Q now implies this. This option does not affect the
2767 EMACSLOADPATH environment variable (and hence has no effect for
2771 * Changes in Emacs 24.1
2775 *** Many packages now use the `completion-at-point' command,
2776 rather than implementing separate completion commands.
2778 *** `completion-at-point' now handles tags and semantic completion.
2780 *** Completion in a non-minibuffer now tries to detect the end of completion
2781 and pops down the *Completions* buffer accordingly.
2783 *** New option `completion-cycle-threshold' allows completion cycling.
2785 *** New option `completion-category-overrides' for overriding the
2786 default completion style in certain circumstances.
2788 *** New completion style `substring'.
2790 *** Completion of buffer names uses `substring' completion by default.
2792 *** The option `widget-complete-field' has been removed.
2796 *** The first time you try sending mail, Emacs asks for a mail method.
2797 This is implemented by a new default for `send-mail-function', which
2798 is `sendmail-query-once'. This offers to use the smtpmail package, or
2799 to use the old defaults relying on external mail facilities
2800 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2801 `mailclient-send-it' on Windows).
2803 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2804 transfers the report to your desktop's preferred mail client, if there
2805 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2808 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2809 and Mail mode changes
2811 ** Emacs server and client changes
2813 *** New option `server-port' specifies the port for TCP Emacs servers.
2815 *** New emacsclient argument -q/--quiet suppresses some status messages.
2817 *** New emacsclient argument --frame-parameters specifies the frame
2818 parameters of any newly-created graphical frame.
2820 *** If emacsclient shuts down due to Emacs signaling an error,
2821 its exit status is 1.
2823 *** New emacsclient argument --parent-id ID.
2824 This opens a client frame in parent X window ID, via XEmbed, similar
2825 to the --parent-id argument to Emacs.
2827 ** Internationalization changes
2829 *** Emacs now supports display and editing of bidirectional text.
2830 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2831 displayed in the correct visual order as expected by users of those
2832 scripts. The display reordering is a "full bidirectionality" class
2833 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2834 with no RTL text should look exactly the same as before.
2836 **** New buffer-local variable `bidi-display-reordering'.
2837 To disable display reordering in a buffer, change this to nil.
2839 **** New buffer-local variable `bidi-paragraph-direction'.
2840 If nil (the default), Emacs determines the base direction of each
2841 paragraph from its text, as specified by the UBA. Setting the value
2842 to `right-to-left' or `left-to-right' forces a base direction on each
2845 Paragraphs with right-to-left base direction are displayed starting at
2846 the right window edge.
2848 *** Enhanced support for characters with no glyphs in available fonts,
2849 or, on text terminals, characters that cannot be encoded by the
2850 terminal coding system. The new option `glyphless-char-display-control'
2851 specifies how to display them: as a hexadecimal code in a box, a thin
2852 1-pixel space, an empty box, etc.
2854 *** New input methods for Farsi and Bulgarian
2855 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2857 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2858 (U+2010 and U+2011).
2860 *** New Hebrew translation of the Emacs Tutorial.
2861 Type `C-u C-h t' to choose it in case your language setup doesn't
2862 automatically select it.
2864 ** An Emacs Lisp package manager is now included.
2865 This is a convenient way to download and install additional packages,
2866 from a package repository at http://elpa.gnu.org.
2868 *** M-x list-packages shows a list of packages, which can be
2869 selected for installation.
2871 *** New command `describe-package', bound to `C-h P'.
2873 *** By default, all installed packages are loaded automatically when
2874 Emacs starts up. To disable this, set `package-enable-at-startup' to
2875 nil. To specify the packages to load, customize `package-load-list'.
2877 ** Custom theme changes
2879 *** New command `M-x customize-themes', which provides a convenient
2880 interface for enabling and disabling Custom themes.
2882 *** New option `custom-theme-load-path' is the load path for themes.
2883 Emacs no longer looks for Custom themes in `load-path'. The default
2884 value of `custom-theme-load-path' says to look for themes in
2885 `custom-theme-directory', followed by a subdirectory of
2886 `data-directory' named "themes/", which contains a small selection of
2887 built-in Custom themes.
2889 *** New option `custom-safe-themes' records known-safe theme files.
2890 If a theme is not in this list, Emacs queries before loading it, and
2891 offers to save the theme to `custom-safe-themes' automatically. By
2892 default, all themes included in Emacs are treated as safe.
2894 ** Improved GTK integration
2896 *** GTK scroll-bars are now placed on the right by default.
2897 The function `set-scroll-bar-mode' can change this.
2899 *** GTK tool bars can have just text, just images or images and text.
2900 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2901 the default is taken from desktop settings.
2903 *** GTK tool bars can be placed on any edge of the frame.
2904 The frame-parameter tool-bar-position controls this. It takes the
2905 values top, left, right or bottom. The Options => Show/Hide menu has
2908 *** The default colors for selected text (the `region' face) are taken
2909 from the GTK theme when Emacs is built with GTK.
2911 *** Emacs uses GTK tooltips by default if built with GTK.
2912 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2914 ** Graphical interface changes
2916 *** On graphical displays, the mode-line no longer ends in dashes.
2917 Also, the first dash (which does not indicate anything) is just
2918 displayed as a space.
2920 *** `menu-bar-select-buffer-function' lets you choose another operation
2921 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2923 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2924 built with Xft. These fonts can be set via X resources, for example:
2925 Emacs.pane.menubar.font: Courier-12
2929 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2930 or if it receives a SIGINT signal in batch mode.
2932 *** `kill-emacs-hook' is now also run in batch mode.
2933 Third-party code which adds to `kill-emacs-hook' should check if they
2934 do the right thing in batch mode.
2936 ** Scrolling changes
2938 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2939 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2940 of buffer at first key-press (instead they move to top/bottom of buffer)
2941 when `scroll-error-top-bottom' is non-nil.
2943 *** New option `scroll-error-top-bottom' (see above).
2945 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2946 scroll a line instead of full screen.
2948 *** New property `scroll-command' should be set on a command's symbol to
2949 define it as a scroll command affected by `scroll-preserve-screen-position'.
2951 *** If you customize `scroll-conservatively' to a value greater than 100,
2952 Emacs will never recenter point in the window when it scrolls due to
2953 cursor motion commands or commands that move point (e.f., `M-g M-g').
2954 Previously, you needed to use `most-positive-fixnum' as the value of
2955 `scroll-conservatively' to achieve the same effect.
2957 *** "Aggressive" scrolling now honors the scroll margins.
2958 If you customize `scroll-up-aggressively' or
2959 `scroll-down-aggressively' and move point off the window, Emacs now
2960 scrolls the window so as to avoid positioning point inside the scroll
2963 ** Basic SELinux support has been added.
2964 This requires Emacs to be linked with libselinux at build time.
2966 *** Emacs preserves the SELinux file context when backing up.
2967 Also, the function `copy-file' has an extra optional argument for
2968 preserving SELinux context, and the return value of `backup-buffer'
2969 now includes the SELinux context.
2971 *** New functions `file-selinux-context' and `set-file-selinux-context'
2972 get and set the SELinux context of a file.
2976 *** `delete-by-moving-to-trash' now only affects commands that specify
2977 trashing. This avoids inadvertently trashing temporary files.
2979 *** Calling `delete-file' or `delete-directory' with a prefix argument
2980 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2982 ** File- and directory-local variable changes
2984 *** You can stop directory local vars from applying to subdirectories.
2985 Add an element (subdirs . nil) to the alist portion of any variables
2986 settings to indicate that the section should not apply to
2989 *** Directory local variables can apply to some file-less buffers.
2990 Affected modes include dired, vc-dir, and log-edit. For example,
2991 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2992 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2993 `hack-dir-local-variables-non-file-buffer' to support this.
2995 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2996 Instead, use "eval: (minor-mode 1)".
2998 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2999 to `inhibit-local-variables-regexps'. As the name suggests, it now
3000 applies to ALL file local variables, not just -*- lines. The
3001 associated `inhibit-first-line-modes-suffixes' has been renamed in the
3006 *** The `quit-window' command now restores the last buffer displayed
3007 in the quitted window.
3009 *** Resizing an Emacs frame now preserves proportional window sizes,
3010 modulo restrictions like window minimum sizes and fixed-size windows.
3012 *** The behavior of `display-buffer' is now customizable in detail.
3014 **** New option `display-buffer-base-action' specifies a list of
3015 user-determined display "actions" (functions and optional arguments
3016 for choosing the displaying window).
3018 This takes precedence over the default display action, which is
3019 specified by `display-buffer-fallback-action'.
3021 **** New option `display-buffer-alist' maps buffer name regexps to
3022 display actions, taking precedence over `display-buffer-base-action'.
3024 *** New option `window-combination-limit'.
3025 The new option `window-combination-limit' allows to return the space
3026 obtained for resizing or creating a window more reliably to the window
3027 from which such space was obtained.
3029 *** New option `window-combination-resize'.
3030 The new option `window-combination-resize' allows to split a window that
3031 otherwise cannot be split because it's too small by stealing space from
3032 other windows in the same combination. Subsequent resizing or deletion
3033 of the window will resize all windows in the same combination as well.
3035 *** New option `frame-auto-hide-function' lets you choose between
3036 iconifying or deleting a frame when burying a buffer in a dedicated
3037 frame, or quitting a window showing a buffer in a frame of its own.
3039 *** New commands `maximize-window' and `minimize-window'.
3040 These maximize and minimize the size of a window within its frame.
3042 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
3043 These functions allow to navigate through the live buffers that have
3044 been shown in a specific window.
3046 ** Minibuffer changes
3048 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
3049 This is handy for minibuffer-only frames, and is also used for the feature
3050 where mouse-1 pops up *Messages*"', which can now easily be changed.
3052 *** Minibuffers set `truncate-lines' to nil.
3053 If you want to change the value to something else, you could use
3054 for example `minibuffer-setup-hook'.
3056 ** `auto-mode-case-fold' is now enabled by default.
3058 ** `backup-by-copying-when-mismatch' now defaults to t.
3060 ** New basic faces `error', `warning', `success'.
3061 These are used to highlight text indicating failure, caution or
3062 successful operation.
3064 ** New option `list-colors-sort' defines the color sort order
3065 for `list-colors-display'.
3067 ** The variable `focus-follows-mouse' now always defaults to nil.
3070 * Editing Changes in Emacs 24.1
3074 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
3075 `isearch-yank-line'.
3077 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
3078 `isearch-yank-kill'.
3080 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
3082 ** New commands `count-words-region' and `count-words'.
3084 *** M-= is bound to `count-words-region', not `count-lines-region'.
3085 The `count-words-region' command, when called interactively, reports
3086 the number of lines, words, and characters in the region. It is a
3087 superset of the old `count-lines-region', which is now an obsolete
3090 ** The command `just-one-space' (M-SPC), if given a negative argument,
3091 also deletes newlines around point.
3095 *** New option `delete-active-region'.
3096 If non-nil, [delete] and DEL delete the region if it is active and no
3097 prefix argument is given. If set to `kill', those commands kill
3100 *** New command `delete-forward-char', bound to [delete].
3101 This is meant for interactive use, and obeys `delete-active-region'.
3102 The command `delete-char' does not obey `delete-active-region'.
3104 *** `delete-backward-char' is now a Lisp function.
3105 Apart from obeying `delete-active-region', its behavior is unchanged.
3106 However, the byte compiler now warns if it is called from Lisp; Lisp
3107 callers should use delete-char with a negative argument instead.
3109 *** The option `mouse-region-delete-keys' has been deleted.
3111 ** Selection changes.
3113 The default handling of clipboard and primary selections has been
3114 changed to conform with modern X applications. In short, most
3115 commands for killing and yanking text now use the clipboard, while
3116 mouse commands use the primary selection.
3118 In the following, we provide a list of these changes, followed by a
3119 list of steps to get the old behavior back if you prefer that.
3121 *** `select-active-regions' now defaults to t.
3122 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3123 the kill ring. The selected text is put in the primary selection, if
3124 the system possesses a separate primary selection facility (e.g. X).
3126 **** `select-active-regions' also accepts a new value, `only'.
3127 This means to only set the primary selection for temporarily active
3128 regions (usually made by mouse-dragging or shift-selection);
3129 "ordinary" active regions, such as those made with C-SPC followed by
3130 point motion, do not alter the primary selection.
3132 **** `mouse-drag-copy-region' now defaults to nil.
3134 *** mouse-2 is now bound to `mouse-yank-primary'.
3135 This pastes from the primary selection, ignoring the kill-ring.
3136 Previously, mouse-2 was bound to `mouse-yank-at-click'.
3138 *** `x-select-enable-clipboard' now defaults to t on all platforms.
3140 *** `x-select-enable-primary' now defaults to nil.
3141 Thus, commands that kill text or copy it to the kill-ring (such as
3142 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3144 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3145 exactly equivalent to M-w, C-w, and C-y respectively.
3147 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
3148 non-nil by default, as Windows does not support the primary selection
3149 between applications.
3151 *** To return to the previous behavior, do the following:
3153 **** Change `select-active-regions' to nil.
3154 **** Change `mouse-drag-copy-region' to t.
3155 **** Change `x-select-enable-primary' to t (on X only).
3156 **** Change `x-select-enable-clipboard' to nil.
3157 **** Bind `mouse-yank-at-click' to mouse-2.
3159 *** Support for X cut buffers has been removed.
3161 *** X clipboard managers are now supported.
3162 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3164 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3165 in the current rectangle. With a prefix argument, this prompts for a
3166 number to count from and for a format string.
3168 ** `redisplay-dont-pause' now defaults to t.
3169 This makes Emacs feel more responsive to editing commands that arrive
3170 at high rate, e.g. if you lean on some key, because stopping redisplay
3171 in the middle (when this variable is nil) forces more expensive
3172 updates later on, and Emacs appears to be unable to keep up.
3174 ** The behavior of <TAB> for active regions in Text mode has changed.
3175 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3176 when the region is active causes Emacs to indent all the lines in the
3177 region, aligning them with the line previous to the first line in the
3178 region (or with the left margin if there is no previous line).
3180 ** When `occur' is called with a prefix argument, matching strings are
3181 collected into the `*Occur*' buffer without line numbers. If there
3182 are parenthesized subexpressions in the specified regexp, `occur'
3183 reads replacement text that may contain \\& and \\N whose convention
3184 follows `replace-match'.
3187 * Changes in Specialized Modes and Packages in Emacs 24.1
3189 ** Archive Mode has basic support for browsing and updating 7z archives.
3193 *** BibTeX mode now supports biblatex.
3194 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3195 `bibtex-entry-field-alist' is now an obsolete alias for
3196 `bibtex-BibTeX-entry-alist'.
3198 *** New command `bibtex-search-entries', bound to C-c C-a.
3200 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3202 *** New variable `bibtex-search-entry-globally'.
3206 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3208 *** The default browser used by the package is now the "xdg-open" program,
3209 on platforms that support it. This calls your desktop's preferred browser.
3213 *** Support for musical notes.
3215 *** Support for logarithmic units.
3217 *** No longer uses the tex prefix for TeX specific unit names when
3218 using TeX or LaTeX mode.
3220 *** New option to highlight selections using faces.
3222 *** `calc-histogram' has the option of using a vector to determine the bins.
3224 *** New "O" option prefix.
3226 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3228 ** Calendar, Diary, and Appt
3230 *** Diary entries can contain non-printing "comments".
3231 See the variable `diary-comment-start'.
3233 *** Appointments can specify their individual warning times.
3234 See the variable `appt-warning-time-regexp'.
3236 *** The function specified by `appt-disp-window-function' may be passed
3237 lists of arguments if multiple appointments are due at similar times.
3238 If you are using a custom function for this, you should update it.
3240 *** New function `diary-hebrew-birthday'.
3242 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3243 may no longer be nil, but must all be strings.
3245 *** The obsolete (since Emacs 22.1) method of enabling the appt
3246 package by adding `appt-make-list' to `diary-hook' has been removed.
3247 Use `appt-activate' instead.
3249 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3250 appt-issue-message (use the function appt-activate)
3251 appt-visible/appt-msg-window (use the variable appt-display-format)
3253 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3254 view-diary-entries, list-diary-entries, show-all-diary-entries
3258 *** New feature to "guess" the style in an existing buffer.
3259 The main entry point is M-x c-guess.
3261 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3263 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3264 Thus C-M-a will, by default, go to the beginning of the immediate function,
3267 *** "Macros with semicolons" can be registered for correct indentation.
3268 Where such a macro ends a line (no semicolon) the next statement is no longer
3269 parsed as a statement continuation.
3271 ** Comint and modes derived from it use the standard completion code.
3275 *** Compilation mode can be used without Font Lock mode.
3276 `compilation-parse-errors-function' is now obsolete.
3278 *** New variable `compilation-filter-start', which is bound while
3279 `compilation-filter-hook' runs. It records the start position of the
3280 text inserted by `compilation-filter'.
3282 *** `compilation-error-screen-columns' and `compilation-first-column'
3283 are obeyed in the editing buffer. So programming language modes can
3284 set them, whereas previously only the value in the *Compilation*
3289 *** Customize buffers now contain a search field.
3290 The search is performed using `customize-apropos'.
3291 To turn off the search field, set `custom-search-field' to nil.
3293 *** Options in customize group buffers start out hidden if not customized.
3294 Use the arrow to the left of the option name to toggle visibility.
3296 *** custom-buffer-sort-alphabetically now defaults to t.
3298 *** The color widget now has a "Choose" button, which allows you to
3299 choose a color via `list-colors-display'.
3303 *** It is now possible to access buses other than the default system
3306 *** The `dbus-register-method' and `dbus-register-property' functions
3307 optionally do not register names.
3309 *** The new function `dbus-register-service' registers a known service
3310 name on a D-Bus without also registering a property or a method.
3314 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3315 if called with a prefix argument, read a file name from the minibuffer
3316 instead of using the current buffer.
3318 *** The "dired local variables" feature of Dired-x is obsolete.
3319 The standard directory local variables feature replaces it.
3323 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3324 controlling attempts to autojoin a channel.
3326 *** New variable `erc-coding-system-precedence': If we use `undecided'
3327 as the server coding system, this variable will then be consulted.
3328 The default is to decode strings that can be decoded as utf-8 as
3329 utf-8, and do the normal `undecided' decoding for the rest.
3333 *** The default value of `eshell-directory-name' has changed
3334 to be an "eshell" directory in `user-emacs-directory'.
3335 The old "~/.eshell/" directory is still used if it exists, though.
3339 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3340 It now supports multithread non-stop debugging and simultaneous
3341 debugging of several threads.
3345 *** RET (`image-toggle-animation') toggles animation, if applicable.
3346 Animation plays once, unless the option `image-animate-loop' is non-nil.
3350 *** New command M-x info-display-manual displays a named Info manual.
3351 If that manual is already visited in some Info buffer, it displays
3352 that buffer. (This is handy if you have many manuals in many *info*
3353 buffers, and don't remember the name of the buffer visiting the manual
3354 you want to consult.) Otherwise, it loads and displays the manual.
3356 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3357 This is for compatibility with the stand-alone Info reader program,
3358 and also because `Info-edit' is a rarely used command that is disabled
3361 ** Mail mode changes (not Message mode)
3363 *** New command M-x mail-add-attachment for adding MIME attachments
3365 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3366 (Its name is misleading, since it has nothing to do with MIME
3367 attachments.) The old name is now an obsolete alias to the new name.
3369 ** MH-E has been updated to MH-E version 8.3.1.
3370 See MH-E-NEWS for details.
3372 ** Modula-2 mode provides auto-indentation.
3374 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3376 ** nXML mode no longer binds C-RET to `nxml-complete'.
3377 Completion is now performed via `completion-at-point', bound to C-M-i
3378 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3379 default), this performs tag completion.
3381 ** Org mode has been updated to version 7.8.09.
3382 See ORG-NEWS for details.
3384 ** Prolog mode has been completely revamped, with lots of additional
3385 functionality such as more intelligent indentation, electricity,
3386 support for more variants, including Mercury, and a lot more.
3390 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3391 in the Rmail incoming message.
3393 *** The variable `rmail-message-filter' no longer has any effect.
3394 This change was made in Emacs 23.1 but was not advertised at the time.
3395 Try using `rmail-show-message-hook' instead.
3399 *** M-x shell prompts for the shell path name if the default directory
3400 is a remote file name and neither the environment variable $ESHELL nor
3401 the variable `explicit-shell-file-name' is set.
3403 *** TAB is now bound to the standard `completion-at-point' command,
3404 which now implements the pcomplete rules for shell command completion.
3408 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3409 if the mail server supports them. This uses either built-in GnuTLS
3410 support, or the starttls.el library. Customize `smtpmail-stream-type'
3413 *** The variable `smtpmail-auth-credentials' has been removed.
3414 By default, the information is now stored in the file ~/.authinfo.
3415 This was the default value of smtpmail-auth-credentials. If you had
3416 customized smtpmail-auth-credentials to a list of user names and
3417 passwords, those settings are not used. During your first connection
3418 to the smtp server, Emacs will prompt for the user name and password,
3419 and offer to save them to ~/.authinfo. Or you can manually copy the
3420 credentials to ~/.authinfo. For example, if you had
3422 (setq smtpmail-auth-credentials
3423 '(("mail.example.org" 25 "jim" "s!cret")))
3425 then the equivalent line in ~/.authinfo would be
3427 machine mail.example.org port 25 login jim password s!cret
3429 See the auth-source manual for more information, e.g. on encrypting
3430 the credentials file.
3432 *** The variable `smtpmail-starttls-credentials' has been removed.
3433 If you had that set, you need to put
3435 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3437 in your ~/.authinfo file instead.
3439 *** SMTPmail defaults to using the address in the From: header as the
3440 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3441 to the address you wish to use instead.
3445 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3446 and `sql-oracle-scan-on'.
3448 *** New options controlling prompting for login parameters.
3449 Each supported product has a custom variable `sql-*-login-params',
3450 which is a list of the parameters to be prompted for before a
3451 connection is established.
3453 *** The command `sql-product-interactive' now takes a prefix argument,
3454 which causes it to prompt for an SQL product.
3456 *** Product-specific SQL interactive commands now take prefix arguments.
3457 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3458 given a prefix argument, prompt for a name for the SQL interactive
3459 buffer. This reduces the need for calling `sql-rename-buffer'.
3461 *** SQL interactive modes suppress command continuation prompts, and
3462 replace tabs with spaces. The first change impacts multiple line SQL
3463 statements entered with C-j between each line, statements yanked into
3464 the buffer and statements sent with `sql-send-*' functions. The
3465 second prevents the MySQL and Postgres interpreters from listing
3466 object name completions when sent text via `sql-send-*' functions.
3468 *** New command `sql-connect' starts a predefined SQLi session,
3469 using the login parameters from `sql-connection-alist'.
3471 *** New "Save Connection" menu item in SQLi buffers.
3472 This gathers the login params specified for the SQLi session, if it
3473 was not started by a connection, and saves them as a new connection.
3475 *** New commands for listing database objects and details:
3476 sql-list-all and sql-list-table.
3478 *** An API for manipulating SQL product definitions has been added.
3482 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3486 *** New inline access method "ksu" (kerberized su).
3488 *** The following access methods are discontinued: "ssh1_old",
3489 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3491 *** The user option `remote-file-name-inhibit-cache' controls whether
3492 remote file attributes are cached for better performance.
3494 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3495 default value to "".
3497 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3498 for remote machines which support SELinux.
3500 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3501 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3502 the degree of parallelism.
3504 ** VC and related modes
3506 *** Support for pulling on distributed version control systems.
3507 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3508 supported (currently with Bzr, Git, and Mercurial), to update the
3509 current branch and working tree. A prefix argument means to prompt
3510 the user for specifics, e.g. a pull location.
3512 *** `vc-update' is now an alias for `vc-pull'.
3514 *** Support for merging on distributed version control systems.
3515 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3516 is supported (currently with Bzr, Git, and Mercurial), to merge
3517 changes from another branch into the current one. It prompts for
3518 specifics, e.g. a merge source.
3520 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3521 shows a diff while querying the user. It defaults to t.
3523 *** Log entries in some Log View buffers can be toggled to display a
3524 longer description by typing RET (log-view-toggle-entry-display).
3525 This is currently supported for Bzr, Git, and Mercurial (to support
3526 another backend, define a `log-view-expanded-log-entry-function').
3527 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3528 use this to display the full log entry for the revision at point.
3530 *** New command `vc-ediff' allows visual comparison of two revisions
3531 of a file similar to `vc-diff', but using ediff backend.
3533 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3534 this was not advertised at the time.
3536 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3537 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3538 this was not advertised at the time.
3544 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3546 *** partial-completion-mode (complete.el) is obsolete.
3547 You can get a comparable behavior with:
3548 (setq completion-styles '(partial-completion initials))
3549 (setq completion-pcm-complete-word-inserts-delimiters t)
3551 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3553 *** pgg is obsolete (use EasyPG instead).
3555 *** sregex.el is obsolete, since rx.el is a strict superset.
3557 *** s-region.el and pc-select.el are obsolete.
3558 They are superseded by shift-select-mode, enabled by default since 23.1.
3560 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3564 *** The Landmark game is now invoked with `landmark', not `lm'.
3565 Its functions and variables have been similarly renamed.
3567 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3568 (This interfered with cua-mode.)
3570 *** f90.el has some support for Fortran 2008 syntax.
3572 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3574 *** New command `nato-region' converts text to NATO phonetic alphabet.
3577 * New Modes and Packages in Emacs 24.1
3579 ** Occur Edit mode applies edits made in *Occur* buffers to the
3580 original buffers. It is bound to "e" in Occur mode.
3582 ** New global minor mode electric-pair-mode.
3583 When enabled, typing an open parenthesis automatically inserts the
3584 matching closing one.
3586 ** New global minor mode electric-indent-mode.
3587 When enabled, typing certain characters triggers reindentation.
3588 Major modes wishing to use this can set electric-indent-chars or
3589 electric-indent-functions.
3591 ** New global minor mode electric-layout-mode.
3592 When enabled, typing certain characters automatically inserts newlines.
3593 Major modes wishing to use this can set electric-layout-rules.
3595 ** tabulated-list.el provides a generic major mode for tabulated data,
3596 from which other modes can be derived.
3598 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3600 ** secrets.el is an implementation of the Secret Service API, an
3601 interface to password managers like GNOME Keyring or KDE Wallet. The
3602 Secret Service API requires D-Bus for communication. The command
3603 `secrets-show-secrets' offers a buffer with a visualization of the
3606 ** notifications.el provides an implementation of the Desktop
3607 Notifications API. It requires D-Bus for communication.
3609 ** soap-client.el supports access to SOAP web services from Emacs.
3610 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3612 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3614 ** New emacs-lock.el package.
3615 The previous version has been moved to obsolete/old-emacs-lock.el.
3616 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3617 against exiting Emacs and killing the buffer can be set separately.
3618 The mechanism for automatically turning off protection for buffers
3619 with dead inferior processes has been generalized.
3622 * Incompatible Lisp Changes in Emacs 24.1
3624 ** Passing a nil argument to a minor mode function call now ENABLES
3625 the minor mode unconditionally. This is so that you can write e.g.
3627 (add-hook 'text-mode-hook 'foo-mode)
3629 to enable foo-mode in Text mode buffers, removing the need for
3630 `turn-on-foo-mode' style functions. This affects all mode commands
3631 defined by `define-minor-mode'. If called interactively, the mode
3632 command still toggles the minor mode.
3634 ** The return value of `backup-buffer' has changed.
3635 It is now a list of three elements, where the second element is a list
3636 describing the original file's SELinux context. If Emacs or the
3637 system lacks SELinux support, the context list is (nil nil nil nil).
3638 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3640 ** `char-direction-table' and the `char-direction' function were deleted.
3641 They were buggy and inferior to the new support of bidirectional
3642 editing introduced in Emacs 24. If you need the bidirectional
3643 properties of a character, use `get-char-code-property' with the last
3644 argument `bidi-class'.
3646 ** `copy-directory' now copies the source directory as a subdirectory
3647 of the target directory, if the latter is an existing directory. The
3648 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3649 the contents directly into a pre-existing target directory.
3651 ** For mouse click input events in the text area, the Y pixel
3652 coordinate in the POSITION list now counts from the top of the text
3653 area, excluding any header line. Previously, it counted from the top
3656 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3657 been further reduced. Now a backquote not followed by a space is
3658 always treated as a "new-style" backquote. Please remove all
3659 "old-style" backquotes from your code. If your code uses backquotes
3660 as documented in the Elisp manual, and compiles without warning, then
3661 you have nothing to do in this regard. Code not following the
3662 appropriate conventions may fail to compile.
3664 The most common cause of trouble seems to be an old-style backquote
3665 followed by a newline. Another cause of trouble is vector notation
3666 for key sequence notation: instead of [(control ,)] and [(control ')],
3667 you should write [(control ?,)] and [(control ?')], which will work in
3670 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3671 was not advertised at the time. The function `custom-initialize-delay'
3672 replaced all known uses.
3674 ** `view-buffer' now treats special mode-class in the same way that
3675 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3676 major mode is special).
3678 ** Menu and tool bar changes
3680 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3681 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3682 With these alist entries omitted, `make-frame' checks the value of the
3683 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3684 a menu-bar or tool-bar, respectively. If the alist entries are added,
3685 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3687 *** The menu bar bindings's caches are not used any more.
3688 Use (where-is-internal <def> nil t) instead.
3690 ** Regions created by mouse dragging are now normal active regions,
3691 similar to those created by shift-selection (see Selection changes
3692 above). In previous Emacs versions, these regions were delineated by
3693 `mouse-drag-overlay'; that variable has been removed.
3695 ** The fourth argument of `filter-buffer-substring' has been removed.
3696 If you want to remove text properties from the final result, simply
3697 pass the result through substring-no-properties.
3699 ** cl.el no longer provides `cl-19'.
3701 ** The following obsolete functions and aliases have been removed
3702 (the appropriate new function is given in parentheses; "not needed"
3703 means you can just remove all calls to the function in question):
3705 *** `comint-kill-output' (`comint-delete-output')
3706 *** `decompose-composite-char' (`char-to-string')
3707 *** `outline-visible' (`outline-invisible-p')
3708 *** `internal-find-face' (`facep')
3709 *** `internal-get-face' (`facep and check-face')
3710 *** `frame-update-faces' (not needed)
3711 *** `frame-update-face-colors' (`frame-set-background-mode')
3712 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3713 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3714 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3715 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3716 *** `x-make-font-unbold' (`make-face-unbold')
3717 *** `x-make-font-unitalic' (`make-face-unitalic')
3718 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3719 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3720 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3721 *** `char-bytes' (== 1)
3722 *** `isearch-return-char' (`isearch-printing-char')
3723 *** `make-local-hook' (not needed)
3724 *** `set-screen-height' (`set-frame-height')
3725 *** `set-screen-width' (`set-frame-width')
3727 ** The following obsolete variables and varaliases have been removed
3728 (the appropriate new variable is given in parentheses):
3730 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3731 *** `vc-header-alist' (`vc-BACKEND-header')
3732 *** `directory-sep-char' (== ?/)
3733 *** `font-lock-defaults-alist' (`font-lock-defaults')
3734 *** `e' (`float-e').
3736 ** The following obsolete files were removed:
3737 sc.el, x-menu.el, rnews.el, rnewspost.el
3739 ** The format of the finder-inf.el file has changed, since the Finder
3740 mechanism is now based on the package system. The variable
3741 `finder-package-info' is replaced by `package--builtins' and
3742 `finder-keywords-hash'.
3744 ** When generating autoloads, `update-directory-autoloads' no longer
3745 assumes every inspected file is in your `load-path'. It instead
3746 generates relative names according to the current `load-path'.
3749 * Lisp Changes in Emacs 24.1
3751 ** Code can now use lexical scoping by default instead of dynamic scoping.
3752 The `lexical-binding' variable enables lexical scoping for local
3753 variables. It is typically set via a file-local variable in the first
3754 line of the file, in which case it applies to all the code in that
3757 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3758 binding instead of the old dynamic binding mode.
3760 *** Lexically scoped interpreted functions are represented with a new form
3761 of function value which looks like (closure ENV ARGS &rest BODY).
3763 *** New macro `letrec' to define recursive local functions.
3765 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3766 So do `defcustom' and other forms that call `defvar' as a subroutine.
3768 *** New function `special-variable-p' to check whether a variable is
3769 declared as dynamically bound.
3771 *** The form ((lambda ...) ...) is deprecated.
3773 ** An Emacs Lisp testing tool is now included.
3774 Emacs Lisp developers can use this tool to write automated tests for
3775 their code. See the ERT info manual for details.
3777 ** Changes for bidirectional display and editing
3779 *** New function `current-bidi-paragraph-direction'.
3780 This returns the base direction of the paragraph at point.
3782 *** New function `bidi-string-mark-left-to-right'.
3783 Given a string containing characters from right-to-left scripts, this
3784 function returns another string which can be safely inserted into a
3785 buffer, such that any following text will be always displayed to the
3786 right of that string. (This works by appending an invisible Unicode
3787 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3789 This is useful when the buffer has overall left-to-right paragraph
3790 direction and you need to insert a string whose contents are not known
3791 in advance, without disrupting the layout of the line.
3795 *** Window tree functions are accessible in Elisp.
3796 Functions are provided to return the parent, siblings or child windows
3797 of any window including internal windows (windows not associated with a
3798 buffer) in the window tree.
3800 **** New function `window-valid-p' gives non-nil for live and internal
3803 **** Window manipulation can deal with internal windows.
3804 Many window handling functions like `split-window', `delete-window', or
3805 `delete-other-windows' as well as the window resizing functions can now
3806 act on any window including internal ones.
3808 *** window-total-height/-width vs window-body-height/-width.
3809 The function `window-height' has been renamed to `window-total-height'
3810 and `window-width' has been renamed to `window-body-width'. The old
3811 names are provided as aliases. Two new functions `window-total-width'
3812 and `window-body-height' are provided.
3814 *** Window parameters specific to window handling functions.
3815 For each window you can specify a parameter to override the default
3816 behavior of a number of functions like `split-window', `delete-window'
3817 and `delete-other-windows'. The variable `ignore-window-parameters'
3818 allows to ignore processing such parameters.
3820 *** New semantics of third argument of `split-window'.
3821 The third argument of `split-window' has been renamed to SIDE and can be
3822 set to any of the values 'below, 'right, 'above, or 'left to make the
3823 new window appear on the corresponding side of the window that shall be
3824 split. Any other value of SIDE will cause `split-window' to split the
3825 window into two side-by-side windows as before.
3827 *** Window resizing functions.
3828 A new standard function for resizing windows called `window-resize' has
3829 been introduced. This and all other functions for resizing windows no
3830 longer delete any windows when they become too small.
3832 *** Deleting the selected window now selects the most recently selected
3833 live window on that frame instead.
3835 *** `adjust-window-trailing-edge' adjustments.
3836 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3837 is able to resize other windows if a window adjacent to the trailing
3838 edge cannot be shrunk any more. This makes its behavior more similar to
3839 that of Emacs 21 without compromising, however, its inability to delete
3840 windows which was introduced in Emacs 22.
3842 *** Window-local buffer lists.
3843 Windows now have local buffer lists. This means that removing a buffer
3844 from display in a window will preferably show the buffer previously
3845 shown in that window with its previous window-start and window-point
3846 positions. This also means that the same buffer may be automatically
3847 shown twice even if it already appears in another window.
3849 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3850 which if non-nil requires the buffer to be displayed in the currently
3851 selected window, signaling an error otherwise. If nil, another window
3852 can be used, e.g. if the selected one is strongly dedicated.
3854 *** `split-window-vertically' and `split-window-horizontally' renamed
3855 to `split-window-below' and `split-window-right' respectively.
3856 The old names are kept as aliases.
3860 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3861 named ACTION, and takes a display action of the same form as
3862 `display-buffer-base-action' (see Changes, above). A non-nil,
3863 non-list value is treated specially, as the old meaning.
3865 **** New variable `display-buffer-overriding-action'.
3867 **** The procedure of `display-buffer' etc. to choose a window is
3868 determined by combining `display-buffer-overriding-action',
3869 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3870 and `display-buffer-fallback-action'. The second and fourth of these
3871 are user-customizable variables.
3873 See the docstring of `display-buffer' for details.
3875 *** New functions `window-state-get' and `window-state-put'.
3876 These functions allow to save and restore the state of an arbitrary
3877 frame or window as an Elisp object.
3881 *** New variable `completion-extra-properties' used to specify extra
3882 properties of the current completion:
3883 - :annotate-function, same as the old completion-annotate-function.
3884 - :exit-function, function to call after completion took place.
3886 *** Functions on `completion-at-point-functions' can return any of the
3887 properties valid for `completion-extra-properties'.
3889 *** `completion-annotate-function' is obsolete.
3891 *** New `metadata' method for completion tables. The metadata thus returned
3892 can specify various details of the data returned by `all-completions':
3893 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3894 used to select a style in completion-category-overrides.
3895 - `annotation-function' to add annotations in *Completions*.
3896 - `display-sort-function' to specify how to sort entries in *Completions*.
3897 - `cycle-sort-function' to specify how to sort entries when cycling.
3899 *** `minibuffer-local-filename-must-match-map' is not used any more.
3900 Instead, the bindings in `minibuffer-local-filename-completion-map'
3901 are combined with `minibuffer-local-must-match-map'.
3903 *** New variable `completing-read-function' allows overriding the
3904 behavior of `completing-read'.
3906 ** `glyphless-char-display' can now distinguish between graphical and
3907 text terminal display, via a char-table entry that is a cons cell.
3909 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3910 Instead, the offending function is removed.
3914 *** New function `run-hook-wrapped' for running an abnormal hook by
3915 passing the hook functions as arguments to a "wrapping" function.
3916 Like `run-hook-with-args-until-success', it stops at the first
3917 non-nil return value.
3919 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3920 set of "wrapping" filters, similar to around advice.
3921 (A version of this macro was actually added in Emacs 23.2 but was not
3922 advertised at the time.)
3926 *** New macro `condition-case-unless-debug' (this was actually added in
3927 Emacs 23.1 as condition-case-no-debug, but not advertised)
3929 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3931 *** Variable `stack-trace-on-error' removed.
3933 *** The debugger can now "continue" from an error, which means it will
3934 jump to the error handler as if the debugger had not been invoked
3935 instead of jumping all the way to the top-level.
3937 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3938 This can be useful when `inhibit-quit' is set.
3940 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3941 named Emacs server instances.
3943 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3944 to redirect STDOUT to a file.
3946 ** The function `format-time-string' now supports the %N directive,
3947 for higher-resolution time stamps.
3949 ** New input reading functions
3951 *** New function `read-char-choice' reads a restricted set of
3952 characters, discarding any inputs not inside the set.
3954 *** The command `read-color' now requires a match for a color name
3955 or RGB triplet, instead of signaling an error if the user provides
3958 **** `facemenu-read-color' is now an alias for `read-color'.
3960 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3961 The variable is now used to load all kind of supported dynamic libraries,
3962 not just image libraries. The previous name is still available as an
3965 ** Syntax parsing changes
3967 *** New variable `syntax-propertize-function'.
3968 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3969 This allows syntax-table properties to be set independently from font-lock:
3970 just call syntax-propertize to make sure the text is propertized.
3971 Together with this new variable come a new hook
3972 syntax-propertize-extend-region-functions, as well as two helper functions:
3973 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3974 as-is; and syntax-propertize-rules which provides a new way to specify
3977 *** Syntax tables support a new "comment style c" additionally to style b.
3979 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3981 ** frame-local variables cannot be let-bound any more.
3983 ** Major and minor mode changes
3985 *** `set-auto-mode' now respects mode: local variables at the end of files,
3986 as well as those in the -*- line.
3988 *** `prog-mode' is a new major mode from which programming modes
3991 **** `prog-mode-hook' can be used to enable features for programming
3992 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3993 on-the-fly spell checking for comments and strings.
3995 *** New hook `change-major-mode-after-body-hook', run by
3996 `run-mode-hooks' just before any other mode hooks.
3998 *** Enabled globalized minor modes can be disabled in specific major modes.
3999 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
4000 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
4002 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
4004 ** File-handling changes
4006 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
4007 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
4008 both non-nil. Interactively, TRASH defaults to t, unless a prefix
4009 argument is supplied (see Trash changes, above).
4011 *** New file predicates: `file-equal-p', `file-in-directory-p'.
4013 ** Tool-bars can display separators.
4014 Tool-bar separators are handled like menu separators in menu-bar maps,
4015 i.e. via menu entries of the form `(menu-item "--")'.
4019 *** Animated images support (currently animated gifs only).
4021 **** `image-animated-p' returns non-nil if an image can be animated.
4023 **** `image-animate' animates a supplied image spec.
4025 **** `image-animate-timer' returns the timer object for an image that
4028 *** `image-extension-data' has been renamed to `image-metadata'.
4029 The old name is an obsolete alias to the new one.
4031 *** Image mode can view any image type that ImageMagick supports.
4032 This requires Emacs to be built with ImageMagick support.
4034 **** New function `imagemagick-types', defined if ImageMagick support
4035 is enabled, returns a list of image file extensions that your
4036 ImageMagick installation supports.
4038 **** New function `imagemagick-register-types' enables ImageMagick
4039 image types in Image mode and in `create-image' and other helper
4042 **** New option `imagemagick-types-inhibit' excludes certain
4043 ImageMagick image types from `imagemagick-register-types'.
4045 **** With ImageMagick support, there are extra Image mode commands to
4046 resize and rotate images: `image-transform-fit-to-height',
4047 `image-transform-fit-to-width', `image-transform-set-rotation', and
4048 `image-transform-set-scale'.
4050 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
4051 passes it to the mail user agent function. This argument specifies an
4052 action for returning to the caller after finishing with the mail. For
4053 example, this is used by Rmail to optionally delete a mail window.
4055 ** XML and HTML parsing
4056 If Emacs is compiled with libxml2 support, there are two new
4057 functions: `libxml-parse-html-region' (which parses "real world" HTML)
4058 and `libxml-parse-xml-region' (which parses XML). Both return an
4059 Emacs Lisp parse tree.
4061 ** Networking and encryption changes
4063 *** `open-network-stream' can now be used to open an encrypted stream.
4064 It now accepts an optional `:type' parameter for initiating a TLS
4065 connection, directly or via STARTTLS. To do STARTTLS, additional
4066 parameters (`:end-of-command', `:success', `:capabilities-command')
4067 must also be supplied.
4069 *** New library gnutls.el.
4070 The new function `gnutls-available-p' returns non-nil if Emacs is
4071 built with GnuTLS support. The main entry points are
4072 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
4073 these functions through `open-network-stream', because that can
4074 upgrade connections through STARTTLS opportunistically or use plain
4075 SSL, depending on your needs. For debugging, set `gnutls-log-level'
4078 *** New primitive `secure-hash' that supports many secure hash algorithms:
4079 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
4080 sha1.el has been removed. The `sha1' feature is provided by default.
4084 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
4086 ** Progress reporters can now "spin".
4087 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
4088 now be nil, or omitted. This makes a "non-numeric" reporter. Each
4089 time you call `progress-reporter-update' on that progress reporter,
4090 with a nil or omitted VALUE argument, the reporter message is
4091 displayed with a "spinning bar".
4093 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
4094 being reverted, even if the buffer has a local `revert-buffer-function'.
4096 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
4097 If delayed-warnings-list is non-nil, the command loop calls
4098 `delayed-warnings-hook' after `post-command-hook'. At present, this
4099 is only used by Emacs on some platforms to display warnings during
4100 startup, which might otherwise not be noticed. This uses the
4101 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
4103 ** rx.el has a new `group-n' construct for explicitly numbered groups.
4105 ** New function `make-composed-keymap' that constructs a new keymap
4106 from multiple input maps. You can use this to make a keymap that
4107 inherits from multiple maps, eg:
4108 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4110 ** New function `string-prefix-p'.
4111 (This was actually added in Emacs 23.2 but was not advertised at the time.)
4113 ** New reader macro ## that stands for the empty symbol.
4114 This means that the empty symbol can now be read back. Also, #: by itself
4115 (when not immediately followed by a possible symbol character) stands for
4116 an empty uninterned symbol.
4118 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
4120 ** The following functions and variables are obsolete:
4122 *** `tooltip-use-echo-area' is obsolete.
4123 Rather than setting this to t, disable Tooltip mode instead.
4125 *** buffer-substring-filters is obsolete.
4126 Use `filter-buffer-substring-functions' instead.
4128 *** `byte-compile-disable-print-circle' is obsolete.
4130 *** `deferred-action-list' and `deferred-action-function' are obsolete.
4131 Use `post-command-hook' instead.
4133 *** `font-lock-maximum-size' is obsolete.
4136 * Changes in Emacs 24.1 on Non-Free Operating Systems
4138 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4139 and also when HOME is set to C:\ by default.
4141 ** New configure.bat options
4143 *** --enable-checking builds Emacs with extra runtime checks.
4145 *** --distfiles specifies files to be included in binary distribution.
4147 *** --without-gnutls disables automatic GnuTLS detection.
4149 *** --lib for general library linkage, works with the USER_LIBS build variable.
4151 ** New make target `dist' to create binary distribution for MS Windows.
4153 ** The Lisp function `w32-default-color-map' is now obsolete.
4154 (It is only used internally in the Emacs C code.)
4156 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4157 reappear on mouse-over. (Requires OS X 10.6 or later.)
4159 ** On Mac OS X, dragging a file into Emacs visits the file, like on
4160 other platforms, rather than inserting its contents into the buffer.
4163 ----------------------------------------------------------------------
4164 This file is part of GNU Emacs.
4166 GNU Emacs is free software: you can redistribute it and/or modify
4167 it under the terms of the GNU General Public License as published by
4168 the Free Software Foundation, either version 3 of the License, or
4169 (at your option) any later version.
4171 GNU Emacs is distributed in the hope that it will be useful,
4172 but WITHOUT ANY WARRANTY; without even the implied warranty of
4173 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4174 GNU General Public License for more details.
4176 You should have received a copy of the GNU General Public License
4177 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4182 paragraph-separate: "[
\f]*$"