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 C99 or later.
30 ** Building Emacs now requires GNU make, version 3.81 or later.
32 ** By default, Emacs no longer works on IRIX. We expect that Emacs
33 users are not affected by this, as SGI stopped supporting IRIX in
34 December 2013. If you are affected, please send a bug report. You
35 should be able to work around the problem either by porting the Emacs
36 undumping code to GCC under IRIX, or by configuring --with-wide-int,
37 or by sticking with Emacs 24.4.
40 ** The configure option `--with-pkg-config-prog' has been removed.
41 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
43 ** The configure option '--enable-silent-rules' and the command
44 'make V=0' now do a better job of suppressing chatter.
47 * Startup Changes in Emacs 24.5
50 * Changes in Emacs 24.5
52 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
55 ** The default value of `history-length' has increased to 100.
58 ** The new variable `term-file-aliases' replaces some files from lisp/term.
59 The function `tty-run-terminal-initialization' consults this variable
60 when deciding what terminal-specific initialization code to run.
63 ** New variable `system-configuration-features', listing some of the
64 main features that Emacs was compiled with. This is mainly intended
65 for use in Emacs bug reports.
68 ** A password is now hidden also when typed in batch mode. Another
69 hiding character but the default `.' can be used by let-binding the
70 variable `read-hide-char'.
72 ** The new functions `string-collate-lessp' and `string-collate-equalp'
73 preserve the collation order as defined by the system's locale(1)
74 environment. For the time being this is implemented for modern POSIX
75 systems and for MS-Windows, for other systems they fall back to their
76 counterparts `string-lessp' and `string-equal'.
78 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
79 If you want the old, locale-independent sorting, customize the new
80 option `ls-lisp-use-string-collate' to a nil value.
82 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
83 if set to a non-nil value, causes the above 2 functions to ignore
84 symbol and punctuation characters when collating strings. This
85 emulates the behavior of modern Posix platforms when the locale's
86 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
87 MS-Windows doesn't support UTF-8 as codeset in its locales.
90 * Editing Changes in Emacs 24.5
92 ** Emacs now supports "bracketed paste mode" when running on a terminal
93 that supports it. This facility allows Emacs to understand pasted
94 chunks of text as strings to be inserted, instead of interpreting each
95 character in the pasted text as actual user input. This results in a
96 paste experience similar to that under a window system, and significant
97 performance improvements when pasting large amounts of text.
100 * Changes in Specialized Modes and Packages in Emacs 24.5
103 *** Strings after `:documentation' are highlighted as docstrings.
106 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
107 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
108 *** `string-rectangle' provides on-the-fly preview of the result.
110 ** New font-lock functions font-lock-ensure and font-lock-flush, which
111 should be used instead of font-lock-fontify-buffer when called from Elisp.
113 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
114 appending FUN to `minibuffer-setup-hook'.
116 ** Calendar and diary
119 *** New commands to insert diary entries with Chinese dates:
120 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
121 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
124 *** Calendar can list and mark diary entries with Chinese dates.
125 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
127 ** New ERT function `ert-summarize-tests-batch-and-exit'.
130 ** The Rmail commands d, C-d and u now handle repeat counts to delete or
131 undelete multiple messages.
133 ** SES now supports local printer functions; see `ses-define-local-printer'.
135 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
136 specify the type of shell in use (bash, csh, etc).
138 ** The URL package accepts now the protocols "ssh", "scp" and "rsync".
139 When `url-handler-mode' is enabled, file operations for these
140 protocols as well as for "telnet" and "ftp" are passed to Tramp.
144 *** New connection method "nc", which allows to access dumb busyboxes.
146 ** VC and related modes
148 *** New option `vc-annotate-background-mode' controls whether
149 the color range from `vc-annotate-color-map' is applied to the
150 background or to the foreground.
152 ** Calculator: decimal display mode uses "," groups, so it's more
153 fitting for use in money calculations; factorial works with
156 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions
157 , interactive macro evaluation and automatic scanning of #defined symbols.
159 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
160 name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
161 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
162 reinclusion protected header files from being fully hidden.
163 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
164 name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
172 *** crisp.el, tpu-edt.el, ws-mode.el
173 These emulations of old editors are believed to be no longer relevant
174 - contact emacs-devel@gnu.org if you disagree.
177 *** vi.el, vip.el (try M-x viper instead)
180 * New Modes and Packages in Emacs 24.5
183 * Incompatible Lisp Changes in Emacs 24.5
185 ** window-configurations no longer record the buffers's marks.
187 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
188 active region handling.
190 ** deactivate-mark is now buffer-local.
192 ** `cl-the' now asserts that its argument is of the given type.
195 ** Mouse click events on mode line or header line no longer include
196 any reference to a buffer position. The 6th member of the mouse
197 position list returned for such events is now nil.
201 * Lisp Changes in Emacs 24.5
203 *** call-process-shell-command and process-file-shell-command
204 don't take "&rest args" an more.
206 ** New function `funcall-interactively', which works like `funcall'
207 but makes `called-interactively-p' treat the function as (you guessed it)
208 called interactively.
210 ** New function `function-put' to use instead of `put' for function properties.
213 ** New properties that can be specified with `declare':
214 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
215 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
216 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
220 ** New macro `with-file-modes', for evaluating expressions with default file
221 permissions set to temporary values (e.g., for creating private files).
223 ** You can access the slots of structures using `cl-struct-slot-value'.
225 ** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
226 optional repeat-count argument.
228 ** Function `sort' can deal with vectors.
231 ** New utilities in subr-x.el:
232 *** New macros `if-let' and `when-let' allow defining bindings and to
233 execute code depending whether all values are true.
234 *** New macros `thread-first' and `thread-last' allow threading a form
235 as the first or last argument of subsequent forms.
238 * Changes in Frames and Windows Code in Emacs 24.5
240 ** Emacs can now draw horizontal scroll bars on some platforms that
241 provide toolkit scroll bars, namely Gtk, Lucid, Motif and Windows.
242 Horizontal scroll bars are turned off by default.
243 *** New function `horizontal-scroll-bars-available-p' telling whether
244 horizontal scroll bars are available on the underlying system.
245 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
246 bars on all existing and future frames.
247 *** New frame parameters `horizontal-scroll-bars' and
248 `scroll-bar-height' to set horizontal scroll bars and their height
249 for individual frames and in `default-frame-alist'.
250 *** New function `frame-scroll-bar-height' to return the height of
251 horizontal scroll bars on a specific frame.
252 *** `set-window-scroll-bars' now accepts five parameters where the last
253 two specify height and type of the window's horizontal scroll bar.
255 ** The height of a frame's menu and tool bar are no more counted in the
256 frame's text height. This means that the text height stands only for
257 the height of the frame's root window plus that of the echo area (if
258 present). This was already the behavior for frames with external tool
259 and menu bars (like in the Gtk builds) but has now been extended to all
262 ** Frames now do not necessarily preserve the number of columns or lines
263 they display when setting default font, menu bar, fringe width, or
264 scroll bars. In particular, maximized and fullscreen frames are
265 conceptually never resized if such settings change. For fullheight and
266 fullwidth frames, the behavior may depend on the toolkit used.
267 *** New option `frame-inhibit-implied-resize' if non-nil, means that
268 setting default font, menu bar, fringe width, or scroll bars of a
269 specific frame does not resize that frame in order to preserve the
270 number of columns or lines it displays.
272 * Changes in Emacs 24.5 on Non-Free Operating Systems
275 ** Building Emacs for MS-Windows requires at least Windows XP
276 or Windows Server 2003. The built binaries still run on all versions
277 of Windows starting with Windows 9X.
280 * Installation Changes in Emacs 24.4
282 ** Emacs can now be compiled with ACL (access control list) support.
283 This happens by default if a suitable support library is found at
284 build time, like libacl on GNU/Linux. To prevent this, use the
285 configure option `--disable-acl'. See below for the features this provides.
287 ** Emacs can now be compiled with file notification support.
288 This happens by default if a suitable system library is found at
289 build time. To prevent this, use the configure option
290 `--without-file-notification'. See below for file-notify features.
291 This feature is not available for the Nextstep port.
293 ** Emacs can now be compiled with zlib support.
294 This happens by default if zlib is present, which it normally is.
295 To prevent this, use the configure option `--without-zlib'.
296 This provides the function `zlib-decompress-region'; see below for details.
298 ** The configure option `--without-compress-info' has been generalized,
299 and renamed to `--without-compress-install'. It now prevents compression
300 of _any_ files during installation.
302 ** The configure option `--with-crt-dir' has been removed.
303 It is no longer needed, as the crt*.o files are no longer linked specially.
305 ** Directories passed to configure option `--enable-locallisppath' are
306 no longer created during installation.
308 ** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
309 This requires pkg-config to be available at build time.
312 * Startup Changes in Emacs 24.4
314 ** When initializing `load-path', an empty element in the EMACSLOADPATH
315 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
316 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
317 load-path (the one that would have been used if EMACSLOADPATH was unset).
318 This makes it easier to _extend_ the load-path via EMACSLOADPATH
319 (previously, EMACSLOADPATH had to specify the complete load-path,
320 including the defaults). (In older versions of Emacs, an empty element
321 was replaced by ".", so use an explicit "." now if that is what you want.)
323 ** The -L option, which normally prepends its argument to load-path,
324 will instead append, if the argument begins with `:' (or `;' on MS Windows;
325 i.e., `path-separator').
327 ** If you use either site-load.el or site-init.el to customize the dumped
328 Emacs executable, any changes to `load-path' that these files make
329 will no longer be present after dumping. To affect a permanent change
330 to `load-path', use the `--enable-locallisppath' option of `configure'.
332 ** The user option `initial-buffer-choice' can now specify a function
333 to set up the initial buffer.
336 * Changes in Emacs 24.4
338 ** Support for ACLs (access control lists).
339 This requires a suitable support library to be found at build time.
340 On GNU/Linux, the POSIX ACL interface is used via libacl.
341 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
342 ACLs are extended file attributes, used e.g. for finer-grained permissions.
344 *** Emacs preserves the ACL entries of files when backing up.
346 *** New functions `file-acl' and `set-file-acl' get and set file ACLs.
348 ** Support for menus on text-mode terminals.
349 If the terminal supports a mouse, clicking on the menu bar, or on
350 sensitive portions of the mode line or header line, will drop down the
351 menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
352 C-mouse-3 on the text area will pop up the menus defined for those locations.
354 If the text terminal does not support a mouse, you can activate the
355 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
357 If you want the previous behavior, where F10 invoked `tmm-menubar',
358 customize the option `tty-menu-open-use-tmm' to a non-nil value.
359 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
362 ** New option `load-prefer-newer' affects how the `load' function chooses
363 the file to load. If this is non-nil, then when both .el and .elc
364 versions of a file exist, and the caller did not explicitly specify
365 which one to load, then the newer file is loaded. The default, nil,
366 means to always load the .elc file.
368 ** Multi-monitor support
370 *** New functions `display-monitor-attributes-list' and
371 `frame-monitor-attributes' can be used to obtain information about
372 each physical monitor on multi-monitor setups.
374 *** The functions `display-pixel-width' and `display-pixel-height' now
375 behave consistently among the platforms: they return the pixel width
376 or height for all physical monitors associated with the given display
377 as if they were on X. To get information for each physical
378 monitor, use the new functions above. Similar notes also apply to
379 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
380 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
382 ** New function `zlib-decompress-region', which decompresses gzip- and
383 zlib-format compressed data using built-in zlib support (if available).
385 ** The *Messages* buffer is created in `messages-buffer-mode',
386 a new major mode, with read-only status. Any code that might create
387 the *Messages* buffer should call the function `messages-buffer' to do
388 so and set up the mode.
390 ** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
391 You can change the default by customizing `blink-cursor-blinks'.
393 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
394 This affects View mode, etc.
396 ** The default value of `make-backup-file-name-function' is no longer nil.
397 Instead it defaults to a function that does what the nil value used to.
401 *** The command `apropos-variable' is renamed to `apropos-user-option'.
402 `apropos-user-option' shows all user options, while `apropos-variable'
403 shows all variables. When called with a universal prefix argument,
404 the two commands swap their behaviors. When `apropos-do-all' is
405 non-nil, they output the same results.
407 *** The key `?' now describes prefix bindings, like `C-h'.
409 *** The command `describe-function' has been extended for EIEIO.
410 Running it on constructors will show a full description of the
411 generated class. For generic functions, it will show all
412 implementations together with links to the source. The old commands
413 `describe-class', `describe-constructor' and `describe-generic' were
416 *** The function `quail-help' is no longer an interactive command.
417 Use `C-h C-\' (`describe-input-method') instead.
419 ** Frame and window handling
421 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
422 bound to <f11> and M-<f10>, respectively.
424 *** New hooks `focus-in-hook', `focus-out-hook'.
425 These are normal hooks run when an Emacs frame gains or loses input focus.
427 *** The function `window-in-direction' now takes additional arguments
428 for specifying a reference point, wrapping the selection around frame
429 borders, and specifying ways to select the minibuffer window.
431 *** Emacs can now change frame sizes in units of pixels, rather than
432 text rows or columns. When maximizing a frame or making it fullscreen,
433 remaining extra pixels are no longer given to the minibuffer, the rightmost
434 fringe, or other unusable space, but are distributed among the text
435 areas of the frame's windows. If the new option `frame-resize-pixelwise'
436 is non-nil, all frame size changes happen pixelwise and set the
437 corresponding size hints for the window manager.
439 *** Emacs can now change window sizes in units of pixels.
440 Mouse-dragging a mode line or window divider now changes the size of
441 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
442 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
443 resize windows pixelwise. Most functions for changing or accessing
444 window sizes now have an additional argument that allows changes to apply,
445 or values to be returned, in pixels instead of lines/columns.
447 *** The functions `window-body-height' and `window-body-width' now never
448 count partially visible lines or columns if called with a nil PIXELWISE
451 *** Emacs can now draw dividers between adjacent windows. To put
452 dividers between side-by-side/vertically stacked windows customize the
453 frame parameters `right-divider-width' and `bottom-divider-width' to
454 some positive integer. You can drag dividers with the mouse (they show
455 a corresponding cursor when the mouse hovers over them). You can change
456 the appearance of dividers by customizing the faces `window-divider',
457 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
458 two are useful to provide a 3D effect, or to better distinguish dividers
459 from surrounding display objects.
461 *** New functions to return the pixel sizes of window components, namely
462 `window-scroll-bar-width', `window-mode-line-height',
463 `window-header-line-height', `window-right-divider-width', and
464 `window-bottom-divider-width'.
466 *** The new function `window-text-pixel-size' returns the size of the
467 text of a window's buffer in pixels. This allows functions like
468 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
469 window to its buffer as it will be displayed.
471 *** `fit-window-to-buffer' can now resize windows in both dimensions.
472 This behavior is controlled by the new option
473 `fit-window-to-buffer-horizontally'. The new option
474 `fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
476 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
477 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
478 control the size of the frame and its position on screen.
480 *** Temp Buffer Resize Mode can now adjust the height and width of
481 windows and frames. The new option `temp-buffer-max-width' allows you to
482 control the width of temporary buffer windows. Moreover, if the new
483 option `fit-frame-to-buffer' is non-nil and the buffer appears in the
484 root window of a frame, Temp Buffer Resize Mode will try to adjust the
485 width and/or height of the frame.
487 *** `split-window' is now a non-interactive function, not a command.
488 As a command, it was a special case of `C-x 2' (`split-window-below'),
489 and as such superfluous. After being reimplemented in Lisp, its
490 interactive form was mistakenly retained.
492 *** The functions `window-size' and `window-total-size' now have an
493 optional argument to return a rounded size value.
495 *** `window-state-put' now allows you to put a window state into internal
498 *** New option `scroll-bar-adjust-thumb-portion'.
499 Available only on X, this option allows you to control over-scrolling
500 using the scroll bar (i.e., dragging the thumb down even when the end
501 of the buffer is visible).
503 *** New display actions functions for `display-buffer':
505 **** `display-buffer-in-previous-window' displays a buffer in a window
506 previously showing that buffer.
508 **** `display-buffer-at-bottom' chooses or creates a window at the
509 bottom of the selected frame.
511 **** `display-buffer-no-window' to not display the buffer in a window.
513 *** New display action alist entry `allow-no-window' to indicate the
514 caller of `display-buffer' is ready to handle the case of not displaying
515 the buffer in a window.
519 *** `eval-defun' on an already defined defcustom calls the :set function,
522 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
523 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
524 zero prefix argument. This disables truncation of lists in the output,
525 equivalent to setting `(eval-expression-)print-length' and
526 `(eval-expression-)print-level' to nil. Additionally, it causes integers
527 to be printed in other formats (octal, hexadecimal, and character).
529 *** New hook `eval-expression-minibuffer-setup-hook' run by
530 `eval-expression' on entering the minibuffer.
532 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
533 because it affects caching of paragraph scanning results as well.
534 There is no reason to set this to nil except for debugging purposes.
536 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
537 and works for git too, if you fetch the repository notes.
539 ** The default value of `comment-use-global-state' is now t,
540 and this variable has been marked obsolete.
542 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
544 ** The option `set-mark-default-inactive' has been deleted.
545 This unfinished feature was introduced by accident in Emacs 23.1;
546 simply disabling Transient Mark mode does the same thing.
549 * Editing Changes in Emacs 24.4
553 *** `electric-indent-mode' is now enabled by default.
554 Typing RET reindents the current line and indents the new line.
555 `C-j' inserts a newline but does not indent. In some programming modes,
556 additional characters are electric (eg `{').
558 *** New buffer-local `electric-indent-local-mode'.
560 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
561 When invoked without a prefix argument, it now activates a transient
562 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
563 the text indentation in the region. Typing any other key resumes
564 normal editing behavior.
566 *** `tab-stop-list' is now implicitly extended to infinity by repeating
567 the last step. Its default value is changed to nil, which means a tab
568 stop every `tab-width' columns.
570 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
571 In other words, if you visit two files that have the same base name,
572 then rather than creating buffers basename and basename<2>,
573 Emacs uses basename<dirA> and basename<dirB>. To change this,
574 customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
576 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
577 Most commands are still unaware of it, but kill/yank do work on the rectangle.
579 ** New option `visual-order-cursor-movement'.
580 If this is non-nil, cursor motion with arrow keys will follow the
581 visual order of characters on the screen: <left> always moves to the
582 left, <right> always moves to the right, disregarding the surrounding
583 bidirectional context.
585 ** New command `delete-duplicate-lines'.
586 This searches the region for identical lines, and removes all but one
587 copy of each repeated line. The lines need not be sorted.
589 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
590 When called in succession, it cycles between spacing conventions:
591 one space, no spaces, original spacing.
593 ** `blink-matching-paren' now only highlights the matching open-paren
594 by default, instead of moving the cursor. Set this variable to `jump' to
595 restore the old behavior.
597 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
598 a line after a one-letter word, which is an error in some typographical
599 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
603 *** All interactive commands that read a register (`copy-to-register', etc.)
604 now display a temporary window after `register-preview-delay' seconds
605 that summarizes existing registers. To disable this, set that option to nil.
606 Interactive commands that read registers and want to make use of this
607 should use `register-read-with-preview' to read register names.
609 *** New command `frameset-to-register' bound to `C-x r f', replacing
610 `frame-configuration-to-register'. It offers similar functionality,
611 plus enhancements like the ability to restore deleted frames.
612 (`frame-configuration-to-register' still exists, but no longer has a
615 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
619 * Changes in Specialized Modes and Packages in Emacs 24.4
621 ** Backtrace and debugger
623 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
624 display of local variables of the current stack frame.
626 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
627 the lexical environment when evaluating the code in the context at point
628 (and so allows you to access lexical variables).
630 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
632 ** Battery information can now be retrieved from BSD's `apm' utility.
634 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
638 *** Calc by default now uses the Gregorian calendar for all dates, and
639 uses January 1, 1 AD as its day number 1. Previously Calc used the
640 Julian calendar for dates before September 14, 1752, and it used
641 December 31, 1 BC as its day number 1; the new scheme is more
642 consistent with Calendar's calendrical system and day numbering.
644 *** The new option `calc-gregorian-switch' lets you configure if
645 (and when) Calc switches from the Julian to the Gregorian calendar.
647 *** Support for ISO 8601 dates.
649 ** Calendar and Diary
651 *** New faces `calendar-weekday-header', `calendar-weekend-header',
652 and `calendar-month-header'.
654 *** New option `calendar-day-header-array'.
656 *** New variable `diary-from-outlook-function', used by the command
657 `diary-from-outlook'.
659 *** The variable `calendar-font-lock-keywords' is obsolete.
665 **** The cpp-root project now supports executing a compile command.
666 It can be set through the new :compile-command slot or the
667 buffer-local variable `compile-command'.
669 **** Better selection of include directories for the 'linux' project.
670 Include directories now support out-of-tree build directories and
671 target architecture auto-detection.
675 **** Improved detection of used namespaces in current scope in C++.
677 **** Parsing of default values for variables and function arguments in C/C++.
678 They are also displayed by the summarize feature in the mode line.
680 **** Improved parsing of function pointers in C/C++.
681 This also includes parsing of function pointers as function arguments.
683 **** Parsing of C/C++ preprocessor macros that open new scope.
684 For example, this enables parsing of macros that open new namespaces.
686 **** Support for 'this' pointer in inline member functions in C++.
690 *** Support for completion, ElDoc, and Flycheck has been added.
692 *** The current CFEngine syntax is parsed from "cf-promises -s json".
693 There is a fallback syntax available if you don't have cf-promises or
694 if your version doesn't support that option. See option `cfengine-cf-promises'.
698 *** New macro `cl-tagbody'.
699 This executes statements while allowing for control transfer to labels.
701 *** letf is now just an alias for cl-letf.
705 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
706 Hence, you can now enable it independently from those modes, and from
707 `transient-mark-mode'.
709 *** `cua-highlight-region-shift-only' is now obsolete.
710 You can disable `transient-mark-mode' to get the same result.
712 *** CUA's rectangles can now be used without CUA by calling the command
713 `cua-rectangle-mark-mode'.
715 ** Delete Selection mode can now be used without Transient Mark mode.
719 *** `desktop-save-mode' by default now auto-saves an existing desktop file
720 after `desktop-auto-save-timeout'. To disable this, customize that option
723 *** Desktop now saves and restores the frame/window configuration.
724 To disable this, set `desktop-restore-frames' to nil.
725 See also related options `desktop-restore-reuses-frames',
726 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
728 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
729 such as file ownership or permissions, are visible in Dired buffers.
730 See the new options `dired-hide-details-hide-symlink-targets' and
731 `dired-hide-details-hide-information-lines' for customizing what to hide.
733 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
734 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
735 The results display in the mode line.
737 ** Electric Pair mode
739 *** New option `electric-pair-preserve-balance', enabled by default.
740 If non-nil, pairing/skipping only kicks in when that help the balance
741 of parentheses and quotes; i.e., the buffer should end up at least as
744 You can further control this behavior by adjusting the predicates
745 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
747 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
748 In `electric-pair-mode', the commands `backward-delete-char' and
749 `backward-delete-char-untabify' are now bound to electric variants
750 that delete the closer when invoked between adjacent pairs.
752 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
753 In `electric-pair-mode', inserting a newline between adjacent pairs
754 opens an extra newline after point, which is indented if
755 `electric-indent-mode' is also set.
757 *** New option `electric-pair-skip-whitespace', enabled by default.
758 This controls if skipping over closing delimiters should jump over any
759 whitespace slack. Setting it to `chomp' makes it delete this
760 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
762 *** New variables control the pairing in strings and comments.
763 You can customize `electric-pair-text-pairs' and
764 `electric-pair-text-syntax-table' to tweak pairing behavior inside
765 strings and comments.
767 ** New EPA option `epa-mail-aliases'.
768 You can set this to a list of email address aliases that `epa-mail-encrypt'
769 should use to find keys.
771 ** New ERC option `erc-accidental-paste-threshold-seconds'.
772 If set to a number, this can be used to avoid accidentally pasting large
773 amounts of data into the ERC input.
775 ** New ERT macro `skip-unless' allows skipping ERT tests.
779 *** `eshell' now supports visual subcommands and options.
780 Eshell has been able to handle "visual" commands (interactive,
781 non-line oriented commands such as top that require display
782 capabilities not provided by eshell) by running them in an Emacs
783 terminal emulator. See `eshell-visual-commands'.
785 This feature has been extended to subcommands and options that make a
786 usually line-oriented command a visual command. Typical examples are
787 "git log" and "git <command> --help", which display their output in a
788 pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
790 *** New Eshell-Tramp module.
791 External su and sudo commands are now the default; the internal,
792 Tramp-using variants can still be used by enabling the eshell-tramp module.
794 ** New F90 mode option `f90-smart-end-names'.
796 ** New option `gnutls-verify-error', if non-nil, means that Emacs
797 should reject SSL/TLS certificates that GnuTLS determines as invalid.
798 (This option defaults to nil at present, but this is expected to change
799 in a future release.)
803 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
804 the symbol near point.
806 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
807 will cycle through faces in `hi-lock-face-defaults' without prompting.
809 ** Icomplete is now more similar to Ido.
811 *** Icomplete by default now applies to all forms of minibuffer completion.
812 The variable `icomplete-with-completion-tables' (now a user option)
813 controls this. To restore the old behavior, set it back to
814 '(internal-complete-buffer).
816 *** You can navigate through and select completions using the keys
817 from `icomplete-minibuffer-map'.
819 *** The string that separates potential completions is now a customizable
820 option (`icomplete-separator'). The default is " | " rather than ",".
822 *** New face `icomplete-first-match'; and new options
823 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
825 *** The option `icomplete-show-key-bindings' has been removed.
829 *** An Ido user manual is now included.
831 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
832 This means to use virtual buffers if the current ido input does not match
835 *** The variable `ido-decorations' can optionally have two new elements,
836 which are the brackets to use around the sole remaining completion.
840 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
841 visit the next image file and the previous image file in the same
842 directory, respectively.
844 *** New commands to show specific frames of multi-frame images.
845 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
846 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
848 *** New commands to speed up, slow down, or reverse animation.
849 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
850 speed up and slow down the animation. `a r' (`image-reverse-speed')
851 to reverse it and `a 0' (`image-reset-speed') to reset it.
853 *** The command `image-mode-fit-frame' deletes other windows.
854 When toggling, it restores the frame's previous window configuration.
855 It also has an optional frame argument, which can be used by Lisp
856 callers to fit the image to a frame other than the selected frame.
858 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
862 *** New Info face `info-index-match', used to highlight matches in index
863 entries displayed by `Info-index-next', `Info-virtual-index' and
866 *** The Info-edit command is obsolete. Editing Info nodes by hand
867 has not been relevant for some time.
871 *** New option `js-switch-indent-offset'.
873 *** Better indentation of multiple-variable declarations.
874 If a declaration spans several lines, variables on the following lines
875 are lined up to the first one.
877 *** Recognition and better indentation of continuations in array comprehensions.
879 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
883 *** Font locking for Texinfo comments and new keywords.
885 *** Completion in Octave file buffers.
889 *** Jump to definition.
891 *** Documentation lookup/search.
893 ** OPascal mode is the new name for Delphi mode
895 *** All delphi-* variables and functions have been renamed to opascal-*.
896 Obsolete aliases exist for those likely to have been used externally.
898 *** The option `delphi-newline-always-indents' has been removed.
899 Use `electric-indent-mode' instead.
901 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
905 *** The package library now supports digital signing of packages.
906 Maintainers of package archives should consider signing their packages
909 **** If the user option `package-check-signature' is non-nil,
910 Emacs tries to check package signatures at install time.
911 The value `allow-unsigned' allows installation of unsigned packages.
913 **** The user option `package-unsigned-archives' lists archives where
914 Emacs will not try to check signatures.
916 *** New option `package-pinned-packages'. This is useful if you have multiple
917 archives enabled, with more than one offering a given package that you want.
919 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
920 to filter the list of packages by a keyword.
922 *** In the `describe-package' buffer, there are now buttons listing the
923 keywords related to the package. Click on a button to see other packages
924 related to that keyword.
926 *** The format of `archive-contents' files, generated by package
927 repositories, has changed to allow a new (fifth) element in the data
928 vectors, containing an associative list with extra properties.
929 (For example, `describe-package' uses the `:url' extra property to
930 display a "Homepage" header.)
932 ** In Prolog mode, `prolog-use-smie' has been removed,
933 along with the non-SMIE indentation code.
937 *** Out of the box support for CPython, iPython and readline based shells.
938 **** `python-shell-completion-module-string-code' is no longer used.
940 *** Automatic shell prompt detection. New user options:
941 **** `python-shell-interpreter-interactive-arg'.
942 **** `python-shell-prompt-detect-enabled'.
943 **** `python-shell-prompt-detect-failure-warning'.
944 **** `python-shell-prompt-input-regexps'.
945 **** `python-shell-prompt-output-regexps'.
947 *** Python shell support for remote hosts via tramp.
949 *** Correct display of line numbers for code sent to the Python shell.
953 *** The new command `remember-notes' creates a buffer that is saved on exit.
954 You can use it as a more permanent *scratch* buffer.
956 *** Remember can now store notes in separate files.
957 To use this, add `remember-store-in-files' to the `remember-handler-functions'
958 option. The files are saved in `remember-data-directory' using
959 names specified by `remember-directory-file-name-format'.
963 *** Customize `rmail-mbox-format' to influence some minor aspects of
964 how Rmail displays non-MIME messages.
966 *** The `unrmail' command now converts from BABYL to mboxrd format,
967 rather than mboxo. Customize `unrmail-mbox-format' to change this.
971 *** Improved syntax highlighting and indentation.
973 *** New `electric-indent-mode' integration.
975 *** New option `ruby-encoding-magic-comment-style'.
977 *** New option `ruby-custom-encoding-magic-comment-template'.
979 *** New option `ruby-align-to-stmt-keywords'.
981 *** New option `ruby-align-chained-calls'.
983 *** More Ruby file types have been added to `auto-mode-alist'.
985 ** Search and Replace
987 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
988 starts a symbol (identifier) incremental search forward with the
989 symbol found near point added to the search string initially.
991 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
992 and adds it to the search string.
994 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
996 *** `query-replace' skips invisible text when `search-invisible' is nil,
997 and opens overlays with hidden text when `search-invisible' is `open'.
999 *** A negative prefix argument of replacement commands replaces backward.
1000 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
1001 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
1003 *** By default, prefix arguments do not now terminate Isearch mode.
1004 Set `isearch-allow-prefix' to nil to restore the old behavior.
1006 *** More Isearch commands accept prefix arguments, namely
1007 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
1008 `isearch-yank-line'.
1010 *** Word search now matches whitespace at the beginning/end
1011 of the search string if it contains leading/trailing whitespace.
1012 In an incremental word search or when using a non-nil LAX argument
1013 of `word-search-regexp', the lax matching can also match part of
1014 the first word (in addition to the lax matching of the last word).
1015 The same rules are now applied to the symbol search, with the difference
1016 that it matches symbols, and non-symbol characters between symbols.
1018 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
1020 ** The shell.el option `explicit-bash-args' includes --noediting by default.
1021 All non-ancient Bash versions support this option.
1023 ** Shell Script mode
1025 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
1027 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
1031 *** You can customize the SMIE indentation of a mode via `smie-config'.
1032 The command `smie-config-guess' can help you derive the appropriate
1033 indentation settings, if you provide it with an indented sample file.
1034 Use `smie-config-save' to save the result.
1036 *** You can customize the SMIE indentation of a file by adding an entry to
1037 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
1039 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
1043 *** Improved login monitoring and appropriate response to login failures.
1044 New variable `sql-login-delay' defines maximum wait time for a connection.
1047 SQL*Plus script placeholders are properly highlighted and identified
1048 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
1049 are passed before the logon parameter, as required. The default now
1050 includes `-L', to limit the number of logon attempts per invocation.
1052 ** New Term mode option `term-suppress-hard-newline'.
1054 ** Todo mode has been rewritten and enhanced.
1055 The Todo mode user manual describes all commands and most user
1056 options. To support some of these features, a new file format is
1057 used, which is incompatible with the old format; however, you can
1058 convert old todo and done item files to the new format on initializing
1059 the first new todo file, or at any later time with the provided
1060 conversion command. The previous version of todo-mode.el has been
1061 renamed to otodo-mode.el and is now obsolete. New features include:
1063 *** Support for multiple todo files and archive files of done items.
1065 *** Renaming, reordering, moving, merging, and deleting categories.
1067 *** Sortable tabular summaries of categories and the item types they contain.
1069 *** Cross-category lists of items filtered by specific criteria.
1071 *** More fine-grained interaction with the Emacs diary, by being able to
1072 decide for each todo item whether it appears in the Fancy Diary display.
1074 *** Highly flexible new item insertion and item editing.
1076 *** Moving items between categories, storing done items in their category
1077 or in archive files, undoing or unarchiving done items.
1079 *** Reprioritizing items by inputting a numerical priority.
1081 *** Extensive customizability of operation and display, including many faces.
1085 *** `trace-function' and `trace-function-background' no longer prompt for
1086 the output buffer. Unless you use a prefix argument, they output to
1089 *** With a prefix argument, `trace-function' and `trace-function-background'
1090 will prompt for a "context". This is a Lisp expression, whose value at the
1091 time the function is entered/exited is printed along with the function's
1096 *** New connection method "adb", which allows to access Android
1097 devices by the Android Debug Bridge. The variable `tramp-adb-program'
1098 can be used to adapt the path of the "adb" program, if needed.
1100 *** Handlers for `file-acl' and `set-file-acl' for remote machines
1101 that support POSIX ACLs.
1103 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1104 for remote machines that support filesystem notifications.
1106 *** The experimental url syntax for remote file names has been removed.
1108 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1109 "scpc" and "rsyncc" are discontinued. The ssh option
1110 "ControlMaster=auto" is set automatically in all ssh-based methods,
1111 when possible. See `tramp-use-ssh-controlmaster-options'.
1113 ** New URL command `url-cookie-list' displays the current cookies,
1114 and allows you to interactively remove cookies.
1116 ** VC and related modes
1118 *** In VC directory mode, `D' displays diffs between VC-controlled
1119 whole tree revisions.
1121 *** In VC directory mode, `L' lists the change log for the current VC
1122 controlled tree in a window.
1124 *** In VC directory mode, `I' shows a log of changes that will be
1125 received with a pull operation.
1127 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1128 under current version control system. When called with a prefix
1129 argument, you can remove a file from the ignored file list.
1133 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1135 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1137 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1138 are obsolete. Customize the `woman-*' faces instead.
1140 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
1142 ~/.emacs.d/timelog replaces ~/.timelog
1143 ~/.emacs.d/vip replaces ~/.vip
1144 ~/.emacs.d/viper replaces ~/.viper
1145 ~/.emacs.d/ido.last replaces ~/.ido.last
1146 ~/.emacs.d/kkcrc replaces ~/.kkcrc
1147 ~/.emacs.d/quickurls replaces ~/.quickurls
1148 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
1149 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
1150 ~/.emacs.d/places replaces ~/.emacs-places
1151 ~/.emacs.d/shadows replaces ~/.shadows
1152 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
1153 ~/.emacs.d/strokes replaces ~/.strokes
1154 ~/.emacs.d/notes replaces ~/.notes
1155 ~/.emacs.d/type-break replaces ~/.type-break
1156 Also the following files used by the now obsolete otodo-mode.el:
1157 ~/.emacs.d/todo-do replaces ~/.todo-do
1158 ~/.emacs.d/todo-done replaces ~/.todo-done
1159 ~/.emacs.d/todo-top replaces ~/.todo-top
1161 ** Obsolete packages
1163 *** iswitchb.el; use icomplete-mode.
1165 *** longlines.el; use visual-line-mode.
1171 *** terminal.el; use term.el instead.
1173 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1175 *** xesam.el (owing to the cancellation of the XESAM project).
1177 *** yow.el; use fortune.el or cookie1.el instead.
1180 * New Modes and Packages in Emacs 24.4
1182 ** New package eww.el provides a built-in web browser.
1183 This requires Emacs to have been compiled with libxml2 support.
1185 ** New package nadvice.el offers lighter-weight advice facilities.
1188 *** `add-function'/`remove-function', which can be used to add/remove code on
1189 any function-carrying place, such as process filters or `<foo>-function' hooks.
1191 *** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
1192 function, much like `defadvice' does.
1194 ** New package frameset.el provides a set of operations to save a frameset
1195 (the state of all or a subset of the existing frames and windows, somewhat
1196 similar to a frame configuration), both in-session and persistently, and
1197 restore it at some point in the future.
1199 ** New package filenotify.el provides an interface for file system
1200 notifications. It requires that Emacs be compiled with one of the
1201 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1203 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1204 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1205 this replaces the string "lambda" with the Greek lambda character.
1207 ** New minor mode `superword-mode', which overrides the default word motion
1208 commands to treat "symbol_words" as a single word, similar to what
1209 `subword-mode' does.
1212 * Incompatible Lisp Changes in Emacs 24.4
1214 ** The default file coding for Emacs Lisp files is now utf-8.
1215 (See `file-coding-system-alist'.) In most cases, this change is
1216 transparent, but files that contain unusual characters without
1217 specifying an explicit coding system may fail to load with obscure
1218 errors. You should either convert them to utf-8 or add an explicit
1221 ** Default process filters and sentinels are not nil any more.
1222 Instead they default to a function that does what the nil value used to do.
1224 ** Overlay priority does not have to be nil or a non-negative integer.
1225 Overlay priority can be other kinds of Lisp objects. We didn't yet
1226 decide whether other types of values are stable enough, and therefore
1227 don't feel it's right to document them. For now, don't assume in your
1228 code that the values of overlay priority can only be either nil or an
1229 integer, always test them with an appropriate predicate to be one or
1230 the other. If you need to sort arbitrary overlays into priority
1231 order, `overlays-at' can now optionally do this.
1232 You should still only specify integer priorities on overlays you create.
1234 ** The cars of the elements in `interpreter-mode-alist' are now
1235 treated as regexps rather than literal strings.
1237 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1238 It used to disable the minor mode, major mode, and text-property keymaps,
1239 whereas now it simply has higher precedence.
1241 ** `kill-region' has lost its `yank-handler' optional argument.
1243 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1244 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1246 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1248 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1249 Some languages match those as »...«, and others as «...», so it is
1250 better for Emacs to stay neutral by default.
1252 ** `read-event' does not always decode chars in ttys any more. As was the case
1253 in Emacs 22 and before, `read-event' (and `read-char') by default read raw
1254 bytes from the terminal. If you want to read decoded chars instead (as was
1255 always the case in Emacs-23, for example), pass a non-nil
1256 `inherit-input-method' argument.
1258 ** In `symbol-function', nil and "unbound" are indistinguishable.
1259 `symbol-function' does not signal a `void-function' error any more.
1260 To determine if a symbol's function definition is void, use `fboundp'.
1262 ** `defadvice' does not honor the `freeze' flag and cannot advise
1263 special-forms any more.
1265 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1266 when lexical binding is enabled. Previously, VAR was bound to nil,
1267 which often led to spurious unused-variable warnings.
1269 ** The return value of `backup-buffer' has changed.
1270 The second argument is no longer an SELinux context, instead it is an
1271 alist of extended attributes as returned by the new function
1272 `file-extended-attributes'. The attributes can be applied to another
1273 file using `set-file-extended-attributes'.
1275 ** By default `copy-file' no longer copies file permission bits to an
1276 existing destination; and it sets the file permission bits of a newly
1277 created destination to those of the source, masked by the default file
1278 permissions. To copy the file permission bits, pass t as the
1279 PRESERVE-PERMISSIONS argument of `copy-file'.
1281 ** `visited-file-modtime' now returns -1 for nonexistent files.
1282 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1283 in the presence of files with negative time stamps.
1285 ** Frame-local variables that affect redisplay do not work any more.
1286 More specifically, redisplay does not bother to check for a frame-local
1287 value when looking up variables.
1289 ** In compiled Lisp files, the header no longer includes a timestamp.
1291 ** The option `inhibit-local-menu-bar-menus' has been removed.
1294 * Lisp Changes in Emacs 24.4
1296 ** Change to the Emacs Lisp coding conventions: the package descriptor
1297 and name of global variables, constants, and functions should be separated
1298 by two hyphens if the symbol is not meant to be used by other packages.
1300 ** The second argument of `eval' can now specify a lexical environment.
1302 ** New macro `define-alternatives' can be used to define generic commands.
1303 Generic commands are interactive functions whose implementation can be
1304 selected among several alternatives, as a matter of user preference.
1306 ** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1308 ** New functions `special-form-p' and `macrop'.
1310 ** New macro `with-eval-after-load'.
1311 This is like the old `eval-after-load', but better behaved.
1313 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1314 on that symbol will use the associated value as a function to call
1317 ** New variable `enable-dir-local-variables'.
1318 Directory-local variables are ignored if this is nil. This may be
1319 useful for modes that want to ignore directory-locals while still
1320 respecting file-local variables.
1322 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1323 as a function to call to provide default values.
1325 ** New functions `group-gid' and `group-real-gid'.
1327 ** New function `get-pos-property'.
1329 ** New hook `pre-redisplay-function'.
1331 ** `byte-compile-interactive-only-functions' is now obsolete.
1332 To specify that a command should only be called interactively, give it
1333 a non-nil `interactive-only' property.
1335 ** New function `string-suffix-p'.
1337 ** `split-string' now takes an optional argument TRIM.
1338 The value, if non-nil, is a regexp that specifies what to trim from
1339 the start and end of each substring.
1343 *** The separator used by `completing-read-multiple' is now a regexp.
1344 The default `crm-separator' has been changed to allow surrounding spaces
1347 *** New function `completion-table-with-cache' is a wrapper for
1348 `completion-table-dynamic' that caches the result of the last lookup.
1350 *** New function `completion-table-merge' to combine several
1351 completion tables by merging their completions.
1353 *** The `common-substring' argument of `display-completion-list',
1354 which has been documented as obsolete since Emacs 23.1, is now _really_
1355 obsolete, and no longer advertised. Instead either call
1356 `completion-hilit-commonality' to add the highlighting; or use
1357 `completion-all-completions', which returns highlighted strings.
1359 ** Encoding and decoding of text
1361 *** New coding-system `prefer-utf-8'.
1362 This is like `undecided' but prefers UTF-8 on decoding if the text to
1363 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1364 any non-ASCII characters are automatically encoded as UTF-8.
1366 *** New attributes of coding-systems whose type is `undecided'.
1367 Two new attributes, `:inhibit-null-byte-detection' and
1368 `:inhibit-iso-escape-detection', determine how to detect encoding of
1369 text that includes null bytes and ISO-2022 escape sequences, respectively.
1370 Each of these attributes can be either nil, zero, or t. If t, decoding
1371 text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1372 null bytes cause text to be decoded with no-conversion, and ISO-2022
1373 sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1374 encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1375 `inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1376 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1377 UTF-8 encoding and decoding, whenever possible.
1379 These attributes are only meaningful for coding-systems of type `undecided'.
1380 (The type of a coding-system is determined by its `:coding-type' attribute
1381 and can be accessed by calling the `coding-system-type' function.)
1385 *** New function `define-error'.
1387 *** `with-demoted-errors' takes an additional argument `format'.
1391 *** Face specs set via Custom themes now replace the `defface' spec
1392 rather than inheriting from it. In other words, setting a face via a
1393 theme now behaves like setting it via Customize: you only need to
1394 specify the attributes that you want, you don't need to unset those
1395 that you don't want.
1397 *** The function `face-spec-set' is now like `setq' for face specs.
1398 Its third arg now accepts values specifying a face spec type (defface,
1399 custom, or override spec), and the relevant spec is set accordingly.
1401 *** New face spec attribute :distant-foreground
1402 specifies foreground to use if background color is near the foreground
1403 color that would otherwise have been used.
1405 *** New function `add-face-text-property', which can be used to
1406 conveniently prepend/append new face properties.
1408 *** New face characteristic (supports :underline (:style wave))
1409 specifies whether or not the terminal can display a wavy line.
1413 *** Support for filesystem notifications.
1414 Emacs now supports notifications of filesystem changes, such as
1415 creation, modification, and deletion of files. This requires the
1416 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1417 MS-Windows systems, this is supported for Windows XP and newer.
1419 *** The 9th element returned by `file-attributes' is now unspecified.
1420 Formerly, it was t if the file's gid would change if file were deleted
1421 and recreated. This value has been inaccurate for years on many
1422 platforms, and nobody seems to have noticed or cared.
1424 *** The 6th argument to `copy-file' has been renamed to
1425 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1426 Unix file permission bits as well as SELinux context.
1428 *** The function `file-ownership-preserved-p' now has an optional
1429 argument GROUP which causes it check for file group too. This can be
1430 used in place of the 9th element of `file-attributes'.
1432 *** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1433 with the same interpretation as the returned value of `visited-file-modtime'.
1437 *** `image-animated-p' is now `image-multi-frame-p'.
1438 It returns non-nil for any image that contains multiple frames,
1439 whether or not it specifies a frame delay.
1441 *** New variable `image-default-frame-delay' gives the frame delay for
1442 animated images which do not specify a frame delay.
1444 *** New functions `image-current-frame' and `image-show-frame' for getting
1445 and setting the current frame of a multi-frame image.
1449 *** ImageMagick images now support the :max-width and :max-height keywords.
1451 *** When using `create-image' with image data, you can pass a :format
1452 attribute (via the property-list argument) in order to help
1453 ImageMagick detect the image type. The value should be a MIME
1454 content-type that is found in the new variable `image-format-suffixes'.
1456 ** Revert and Autorevert
1458 *** If Emacs is compiled with file notification support, it uses notifications
1459 instead of checking file time stamps. To disable this, set the user option
1460 `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1461 expression matching directories to be excluded from file notifications via
1462 `auto-revert-notify-exclude-dir-regexp'.
1464 *** The default values of `buffer-stale-function', `revert-buffer-function',
1465 and `revert-buffer-insert-file-contents-function' are no longer nil.
1466 Instead they default to functions that do what the nil value used to.
1468 *** `buffer-stale-function' is now used for buffers visiting files too.
1470 *** The new user option `auto-revert-remote-files' enables reversion
1471 of remote files, if non-nil.
1475 *** Functions to pop up menus and dialogs now work on all terminals,
1476 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1477 `message-box', `yes-or-no-p', etc.
1479 The function `display-popup-menus-p' will now return non-nil for a
1480 display or frame whenever a mouse is supported on that display or frame.
1482 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1484 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1485 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1487 ** Minor internal changes to the details of lock files.
1488 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1489 If DIR/.#FILE already exists and is not an Emacs lock file,
1490 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1491 numbered lock files DIR/.#FILE.0...).
1492 On file systems that do not support symbolic links, the lock is now a
1493 regular file with contents being what would have been in the symlink.
1495 ** New bool-vector set operation functions:
1496 *** `bool-vector-exclusive-or'
1497 *** `bool-vector-union'
1498 *** `bool-vector-intersection'
1499 *** `bool-vector-set-difference'
1500 *** `bool-vector-not'
1501 *** `bool-vector-subsetp'
1502 *** `bool-vector-count-consecutive'
1503 *** `bool-vector-count-population'
1505 ** New library subr-x.el with miscellaneous small utility functions:
1506 *** `hash-table-keys'
1507 *** `hash-table-values'
1508 *** `string-blank-p'
1509 *** `string-empty-p'
1511 *** `string-reverse'
1512 *** `string-trim-left'
1513 *** `string-trim-right'
1515 *** `string-remove-prefix'
1516 *** `string-remove-suffix'
1518 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1520 ** The spelling of the rx.el category `chinese-two-byte' has been
1521 corrected (the first 'e' was missing).
1523 ** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1524 *** object-name -> eieio-object-name
1525 *** object-class -> eieio-object-class
1526 *** object-class-fast -> eieio--object-class
1527 *** object-class-name -> eieio-object-class-name
1528 *** object-name-string -> eieio-object-name-string
1529 *** object-num-slots -> eieio--object-num-slots
1530 *** object-set-name-string -> eieio-object-set-name-string
1531 *** class-of -> eieio-object-class
1532 *** class-name -> eieio-class-name
1533 *** class-parent -> eieio-class-parent
1534 *** class-parents -> eieio-class-parents
1535 *** class-parents-fast -> eieio-class-parents-fast
1536 *** class-children -> eieio-class-children
1537 *** class-num-slots -> eieio--class-num-slots
1538 *** class-precedence-list -> eieio-class-precedence-list
1539 *** class-direct-subclasses -> eieio-class-children
1540 *** class-direct-superclasses -> eieio-class-parents
1542 ** Obsoleted functions
1545 *** `lisp-complete-symbol'
1546 *** `field-complete'
1547 *** `minibuffer-completion-contents'
1548 *** `isearch-nonincremental-exit-minibuffer'
1549 *** `isearch-filter-visible'
1550 *** `generic-make-keywords-list'
1551 *** `get-upcase-table' (use `case-table-get-table' instead).
1553 ** `with-wrapper-hook' is obsoleted by `add-function'.
1554 The few hooks that used with-wrapper-hook are replaced as follows:
1555 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1556 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1557 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1560 * Changes in Emacs 24.4 on Non-Free Operating Systems
1562 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1563 To use the old font backend, use the following on the command line:
1564 % defaults write org.gnu.Emacs FontBackend ns
1565 GNUstep and Mac OS X 10.4 use the old font backend.
1567 ** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1568 default fullscreen method is now "native" fullscreen. To use the
1569 old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1571 ** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1572 by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1573 Note that this does not apply to images.
1575 ** The procedure for building Emacs on MS-Windows has changed.
1576 It is now built by running the same configure script as on all other
1577 platforms. This requires the MSYS environment and MinGW development
1578 tools. See the updated instructions in nt/INSTALL for details.
1580 Using the Posix configure script and Makefiles also means a change in
1581 the directory structure of the Emacs installation on Windows. It is
1582 now the same as on GNU and Unix systems. In particular, the auxiliary
1583 programs, such as cmdproxy.exe and hexl.exe, are in
1584 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1585 version), version-independent site-lisp is in share/emacs/site-lisp,
1586 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1587 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1588 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1589 directories and will find the files in there automatically; there's no
1590 need to set any variables due to this change.)
1592 ** Emacs on Windows 2000 and later can now access files and directories
1593 whose names cannot be encoded in the current system codepage.
1595 The new variable `w32-unicode-filenames' controls this feature: if it
1596 is t, Emacs uses Unicode APIs to pass file names to system calls,
1597 which lifts the limitation of file names to the current locale.
1599 ** Lock files now work on MS-Windows.
1600 This helps to prevent losing your edits if the same file is being
1601 edited in another Emacs session or by another user. See the node
1602 "Interlocking" in the Emacs User Manual for the details. To disable
1603 file locking, customize `create-lockfiles' to nil.
1605 ** The "generate a backtrace on fatal error" feature now works on MS-Windows.
1606 The backtrace is written to the 'emacs_backtrace.txt' file in the
1607 directory where Emacs was running.
1609 ** The `network-interface-list' and `network-interface-info' functions
1610 are now available on MS-Windows.
1612 ** The variable `buffer-file-type' is no longer supported.
1613 Setting it has no effect, and %t in the mode-line format is ignored.
1614 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1615 modifying it has no effect.
1618 * Installation Changes in Emacs 24.3
1620 ** The default X toolkit is now Gtk+ version 3.
1621 If you don't pass `--with-x-toolkit' to configure, or if you use
1622 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1623 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1624 You can explicitly require a specific version by passing
1625 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1627 ** New configure option `--enable-link-time-optimization', to utilize
1628 an appropriate feature provided by GCC since version 4.5.0.
1630 ** New configure option `--without-all' to disable most of the optional
1631 features (image support, etc.) that are normally enabled by default.
1633 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1634 Emacs). If building with GCC, this enables compile-time checks that
1635 warn/give errors about possibly-questionable C code. On a recent GNU
1636 system there should be no warnings; on older and on non-GNU systems
1637 the results may be useful to developers.
1639 ** The configure option `--enable-use-lisp-union-type' has been
1640 renamed to `--enable-check-lisp-object-type', as the resulting
1641 Lisp_Object type no longer uses a union to implement the compile time
1642 check that this option enables.
1644 ** The configure option `--disable-maintainer-mode' has been removed,
1645 as it was confusingly-named and rarely useful.
1647 ** The configure options `--program-prefix', `--program-suffix', and
1648 `--program-transform-name' apply to more than just the installed
1649 binaries. Now they also affect the man pages, icons, and the
1650 etc/emacs.desktop file; but not the info pages, since this would break
1651 links between the various manuals.
1653 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1654 overwriting "emacs" in the installation bin/ directory with a link
1657 ** Emacs uses libtinfo in preference to libncurses, if available.
1659 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1660 /usr/pkg/lib to the linker search path. You must add them yourself if
1663 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1664 (from the bin and libexec directories, respectively). The former is
1665 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1668 * Startup Changes in Emacs 24.3
1670 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1671 lisp/ directory. There should not be any there anyway. If you have
1672 been adding them there, put them somewhere else; e.g., site-lisp.
1674 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1677 * Changes in Emacs 24.3
1681 *** `C-h f' (`describe-function') can now perform autoloading.
1682 When this command is called for an autoloaded function whose docstring
1683 contains a key substitution construct, that function's library is
1684 automatically loaded, so that the documentation can be shown
1685 correctly. To disable this, set `help-enable-auto-load' to nil.
1687 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1688 even after their associated libraries have been loaded (and the
1689 autoloads have been redefined as functions).
1693 *** Images displayed via ImageMagick now support transparency and the
1694 :background image specification property.
1696 *** When available, ImageMagick support is automatically enabled.
1697 It is no longer necessary to call `imagemagick-register-types'
1698 explicitly to install ImageMagick image types; that function is called
1699 automatically at startup, or when customizing an imagemagick- option.
1701 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1702 ImageMagick to view images. (You must call `imagemagick-register-types'
1703 afterwards if you do not use customize to change this.)
1705 *** The new variable `imagemagick-enabled-types' also affects which
1706 ImageMagick types are treated as images. The function
1707 `imagemagick-filter-types' returns the list of types that will be
1712 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1713 next and previous path separator, respectively.
1715 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1716 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1717 non-nil before enabling the mode.
1721 *** New option `mode-line-default-help-echo' specifies the help text
1722 (shown in a tooltip or in the echo area) for any part of the mode line
1723 that does not have its own specialized help text.
1725 *** You can now click mouse-3 in the coding system indicator to invoke
1726 `set-buffer-file-coding-system'.
1728 ** Server and client
1730 *** emacsclient now obeys string values for `initial-buffer-choice',
1731 if it is told to open a new frame without specifying any file to visit
1732 or expression to evaluate.
1734 *** New option `server-auth-key' specifies a shared server key.
1736 ** Emacs now generates backtraces on fatal errors.
1737 On encountering a fatal error, Emacs now outputs a textual description
1738 of the fatal signal, and a short backtrace on platforms like glibc
1739 that support backtraces.
1741 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1742 This minor mode replaces `toggle-read-only', which is now obsolete.
1744 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1745 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1746 respectively, without exiting from the prompt.
1748 ** In the Package Menu, newly-available packages are listed as "new",
1749 and sorted above the other "available" packages by default.
1751 ** If your Emacs was built from a repository checkout, the new variable
1752 `emacs-bzr-version' contains information about the bzr revision used.
1754 ** New option `create-lockfiles' specifies usage of lockfiles.
1755 It defaults to t. Changing it to nil inhibits the creation of lock
1756 files (use this with caution).
1758 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1759 variables on remote hosts.
1761 ** The entry for PCL-CVS has been removed from the Tools menu.
1762 The PCL-CVS commands are still available via the keyboard.
1764 ** Using "unibyte: t" in Lisp source files is obsolete.
1765 Use "coding: raw-text" instead.
1767 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1768 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1769 The previous binding, introduced in Emacs 24.1, was a mistake, because
1770 `C-c LETTER' bindings are reserved for user customizations.
1772 ** Internationalization
1774 *** New language environment: Persian.
1776 *** New input method `vietnamese-vni'.
1778 ** Nextstep (GNUstep / Mac OS X) port
1780 *** Support for fullscreen and the frame parameter fullscreen.
1782 *** A file dialog is used for open/save operations initiated from the
1786 * Editing Changes in Emacs 24.3
1788 ** Search and Replace
1790 *** Non-regexp Isearch now performs "lax" space matching.
1791 Each sequence of spaces in the supplied search string may match any
1792 sequence of one or more whitespace characters, as specified by the
1793 variable `search-whitespace-regexp'. (This variable is also used by a
1794 similar existing feature for regexp Isearch.)
1796 *** New Isearch command `M-s SPC' toggles lax space matching.
1797 This applies to both ordinary and regexp Isearch.
1799 *** New option `replace-lax-whitespace'.
1800 If non-nil, `query-replace' uses flexible whitespace matching too.
1803 *** Global `M-s _' starts a symbol (identifier) incremental search,
1804 and `M-s _' in Isearch toggles symbol search mode.
1805 `M-s c' in Isearch toggles search case-sensitivity.
1807 ** Navigation commands
1809 *** New binding `M-g c' for `goto-char'.
1811 *** New binding `M-g TAB' for `move-to-column'.
1813 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1814 interactively with no prefix arg. Previously, it moved to column 1.
1816 ** New option `yank-handled-properties' allows processing of text
1817 properties on yanked text, in ways that are more general than just
1818 removing them (as is done by `yank-excluded-properties').
1820 ** New option `delete-trailing-lines' specifies whether
1821 M-x delete-trailing-whitespace should delete trailing lines at the end
1822 of the buffer. It defaults to t.
1824 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1826 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1827 `ucs-insert' is now an obsolete alias for `insert-char'.
1829 ** The `z' key no longer has a binding in most special modes.
1830 It used to be bound to `kill-this-buffer', but `z' is too easy to
1833 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1834 It copies the region-rectangle as the last rectangle kill.
1838 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1840 *** New option `register-separator' specifies the register containing
1841 the text to put between collected texts for use with
1842 M-x append-to-register and M-x prepend-to-register.
1845 * Changes in Specialized Modes and Packages in Emacs 24.3
1847 ** Common Lisp emulation (CL)
1849 *** CL's main entry is now (require 'cl-lib).
1850 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1851 i.e., all its definitions have the "cl-" prefix (and internal definitions
1852 use the "cl--" prefix).
1854 If `cl' provided a feature under the name `foo', then `cl-lib'
1855 provides it under the name `cl-foo' instead; with the exceptions of the
1856 few `cl' definitions that had to use `foo*' to avoid conflicts with
1857 pre-existing Elisp entities. These have been renamed to `cl-foo'
1858 rather than `cl-foo*'.
1860 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1861 provide the old, non-prefixed names. Some exceptions are listed below:
1863 *** `cl-flet' is not like `flet' (which is deprecated).
1864 Instead it obeys the behavior of Common-Lisp's `flet'.
1865 In particular, in cl-flet function definitions are lexically scoped,
1866 whereas in flet the scoping is dynamic.
1868 *** `cl-labels' is slightly different from `labels'.
1869 The difference is that it relies on the `lexical-binding' machinery
1870 (as opposed to the `lexical-let' machinery used previously) to capture
1871 definitions in closures, so such closures will only work if `lexical-binding'
1874 *** `cl-letf' is not exactly like `letf'.
1875 The only difference is in details that relate to some deprecated usage
1876 of `symbol-function' in place forms.
1878 *** `progv' was rewritten to use the `let' machinery.
1879 A side effect is that variables without corresponding values are bound
1880 to nil rather than being made unbound.
1882 *** The following methods of extending `setf' are obsolete
1883 (use features from gv.el instead):
1884 `define-modify-macro' (use `gv-letplace')
1885 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1886 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1887 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1891 *** Changes are now highlighted using the same color scheme as in
1892 modern VCSes. Deletions are displayed in red (new faces
1893 `diff-refine-removed' and `smerge-refined-removed', and new definition
1894 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1895 and `smerge-refined-added', and new definition of `diff-added').
1897 *** The variable `diff-use-changed-face' defines whether to use the
1898 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1899 changes in context diffs.
1901 *** The new command `diff-delete-trailing-whitespace' removes trailing
1902 whitespace introduced by a diff.
1904 ** Ediff now uses the same color scheme as Diff mode.
1908 A new version of python.el, which provides several new features, including:
1909 per-buffer shells, better indentation, Python 3 support, and improved
1910 shell-interaction compatible with iPython (and virtually any other
1913 *** Some user options have been replaced/renamed, including (old -> new):
1914 **** python-indent -> python-indent-offset
1915 **** python-guess-indent -> python-indent-guess-indent-offset
1916 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1917 **** python-use-skeletons -> python-skeleton-autoinsert
1919 *** Some user options have been removed, including:
1921 **** `python-indent-string-contents': Strings are never indented.
1923 **** `python-honour-comment-indentation':
1924 Comments are always considered as indentation markers.
1926 **** `python-continuation-offset': Indentation is automatically
1927 calculated in a pep8 compliant way depending on the context.
1929 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1930 Have no direct mapping as the shell interaction is completely different.
1932 **** `python-python-command', `python-jython-command':
1933 Replaced by `python-shell-interpreter'.
1935 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1936 `python-pdbtrack-minor-mode-string', `python-source-modes':
1939 *** Some commands have been replaced (old -> new):
1940 **** python-insert-class -> python-skeleton-class
1941 **** python-insert-def -> python-skeleton-def
1942 **** python-insert-for -> python-skeleton-for
1943 **** python-insert-if -> python-skeleton-if
1944 **** python-insert-try/except -> python-skeleton-try
1945 **** python-insert-try/finally -> python-skeleton-try
1946 **** python-insert-while -> python-skeleton-while
1947 **** python-find-function -> python-nav-jump-to-defun
1948 **** python-next-statement -> python-nav-forward-sentence
1949 **** python-previous-statement -> python-nav-backward-sentence
1950 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1951 **** python-end-of-defun-function -> python-nav-end-of-defun
1952 **** python-send-buffer -> python-shell-send-buffer
1953 **** python-send-defun -> python-shell-send-defun
1954 **** python-send-region -> python-shell-send-region
1955 **** python-send-region-and-go -> emulate with python-shell-send-region
1956 and python-shell-switch-to-shell
1957 **** python-send-string -> python-shell-send-string
1958 **** python-switch-to-python -> python-shell-switch-to-shell
1959 **** python-describe-symbol -> python-eldoc-at-point
1963 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1965 *** The D-Bus object manager interface is implemented.
1967 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1968 if their value does not fit into Emacs's integer range.
1970 *** The function `dbus-call-method' is now non-blocking.
1971 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1973 *** Signals can also be sent as unicast messages.
1975 *** The argument list of `dbus-register-signal' has been extended,
1976 according to the new match rule types of D-Bus.
1978 *** `dbus-init-bus' supports private connections.
1980 *** There is a new function `dbus-setenv'.
1982 ** `desktop-path' no longer includes the "." directory.
1983 Desktop files are now located in ~/.emacs.d by default.
1987 *** `dired-do-async-shell-command' executes each file sequentially
1988 if the command ends in `;' (when operating on multiple files).
1989 Otherwise, it executes the command on each file in parallel.
1991 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1992 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1995 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1996 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1997 mark/unmark/flag all files in the active region.
1999 *** The minibuffer default for `=' (`dired-diff') has changed.
2000 It is now the backup file for the file at point, if one exists.
2001 In Transient Mark mode the default is the file at the active mark.
2003 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2004 The global binding for `M-=', `count-words-region' is in effect.
2008 *** New module "notifications", which can send a notification when you
2009 receive a private message or your nickname is mentioned.
2011 *** ERC will look up server/channel names via auth-source and use any
2014 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2015 only applies to messages sent by lurkers.
2017 ** reStructuredText mode
2019 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2020 fontification, comment handling, and customization have all been revised
2023 *** Support for `imenu' and `which-function-mode'.
2025 *** The reStructuredText syntax is more closely covered.
2026 Sphinx support has been improved.
2028 *** `rst-insert-list' inserts new list or continues existing lists.
2030 *** A negative prefix argument always works for `rst-adjust'.
2032 *** The window configuration is reset after displaying a TOC.
2034 *** The constant `rst-version' describes the rst.el package version.
2038 *** Support for percent literals and recognition of regular expressions
2039 in method calls without parentheses with more methods, including Cucumber
2042 *** Improved syntax highlighting and indentation.
2044 *** New command `ruby-toggle-block', bound to `C-c {'.
2046 *** Some non-standard keybindings/commands have been removed:
2048 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
2050 **** `ruby-mark-defun'; use `mark-defun'.
2052 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2053 appropriate settings for the variables `beginning-of-defun-function'
2054 and `end-of-defun-function'.
2056 **** Non-standard keybindings for `backward-kill-word', `comment-region',
2057 `reindent-then-newline-and-indent' and `newline' have been removed.
2059 ** Shell Script mode
2061 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2063 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2065 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2069 *** The free software compiler GHDL is supported (and now the default).
2071 *** Support for the VHDL-AMS packages has been added/updated.
2073 *** Updated to the 2002 revision of the VHDL standard.
2075 *** Accepts \r and \f as whitespace.
2079 *** The faces used by Apropos are now directly customizable.
2080 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2081 see the `apropos' Custom group for details.
2083 *** The old options whose values specified faces to use have been removed
2084 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2085 `apropos-match-face' and `apropos-property-face'.).
2089 *** This package has been rewritten to use Tabulated List mode.
2091 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2092 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2096 *** Algebraic simplification mode is now the default.
2097 To restrict to the limited simplifications given by the former
2098 default simplification mode, use `m I'.
2102 *** You can customize the header text that appears above each calendar month.
2103 See the variable `calendar-month-header'.
2105 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2107 *** The calendars produced by cal-html include holidays.
2108 Customize `cal-html-holidays' to change this.
2112 *** The major modes from the parser generators "Bovine" and "Wisent"
2113 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2114 are in `auto-mode-alist', and the corresponding manuals are included.
2118 **** Menu support for the "Configuration" feature. This allows users to
2119 choose the active configuration (such as debug or install) from the menu.
2121 **** New command `ede-set' to interactively set project-local variables.
2123 **** Support for compiling, debugging, and running in "generic" projects.
2125 **** Autoconf editing support for M4 macros with complex arguments.
2127 **** Compilation support for the "linux" project type.
2129 **** "simple" projects have been removed; use "generic" projects instead.
2133 **** Support for parsing #include statements inside a namespace in C/C++.
2135 **** Improved support for 'extern "C"' declarations in C/C++.
2137 **** The ability to ignore more common special C/C++ preprocessor symbols,
2138 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2139 If available, include cdefs.h as an additional source of preprocessor symbols.
2141 **** Improved C/C++ function pointer parsing.
2143 **** In Python, support for converting imports to include file names.
2145 **** Ability to dynamically determine the Python load path.
2147 **** Support for the Python 'WITH' and 'AT' keywords.
2149 **** Improved tooltip completion.
2153 **** The SRecode manual is now included.
2155 **** Tag generation supports constructor/destructor settings and system
2156 include differentiation.
2158 **** Addition of 'Framework' support: Frameworks are specified when a
2159 particular kind of library (such as Android) is needed in a common language
2162 **** Support for nested templates and let variables override based on priority.
2164 **** Support for merging tables from multiple related modes, such as
2165 default -> c++ -> arduino.
2167 ** Compile has a new option `compilation-always-kill'.
2171 *** `custom-reset-button-menu' now defaults to t.
2173 *** Non-option variables are never matched in `customize-apropos' and
2174 `customize-apropos-options' (i.e., the prefix argument does nothing for
2175 these commands now).
2179 *** The variables `term-default-fg-color' and `term-default-bg-color'
2180 are now deprecated in favor of the customizable face `term'.
2182 *** You can customize how to display ANSI terminal colors and styles
2183 by customizing the corresponding `term-color-<COLOR>',
2184 `term-color-underline' and `term-color-bold' faces.
2188 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2190 *** Remote processes are now also supported on remote MS-Windows hosts.
2194 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2195 Previously, this slot stored semicolon-separated attribute-value pairs
2196 appended to some imap URLs, but this is not compatible with RFC 3986.
2197 So now the `filename' slot stores the entire path and query components,
2198 and the `attributes' slot is always nil.
2200 *** New function `url-encode-url' for encoding a URI string.
2201 The `url-retrieve' function now uses this to encode its URL argument,
2202 in case that is not properly encoded.
2204 ** notifications.el supports now version 1.2 of the Notifications API.
2205 The function `notifications-get-capabilities' returns the supported
2208 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2209 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2210 `flymake-warning-bitmap'.
2212 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2213 specifying URL types that should be converted to remote file names at
2214 the FFAP prompt. The default is now '("ftp").
2216 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2217 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2219 ** New option `mouse-avoidance-banish-position' specifies where the
2220 `banish' mouse avoidance setting moves the mouse.
2222 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2223 closing brackets to be aligned with the line of the opening bracket.
2225 ** In Proced mode, new command `proced-renice' renices marked processes.
2227 ** New option `async-shell-command-buffer' specifies the buffer to use
2228 for a new asynchronous `shell-command' when the default output buffer
2229 `*Async Shell Command*' is already in use.
2231 ** SQL mode has a new option `sql-db2-escape-newlines'.
2232 If non-nil, newlines sent to the command interpreter will be escaped
2233 by a backslash. The default does not escape the newlines and assumes
2234 that the sql statement will be terminated by a semicolon.
2236 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2237 (and modes that derive from it), sorts the column at point, or the Nth
2238 column if a numeric prefix argument is given.
2240 ** `which-func-modes' now defaults to t, so Which Function mode, when
2241 enabled, applies to all applicable major modes.
2243 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2246 ** Follow mode no longer works by using advice.
2247 The option `follow-intercept-processes' has been removed.
2249 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2251 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2252 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2253 *** semantic-change-hooks -> semantic-change-functions
2254 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2255 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2256 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2257 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2258 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2259 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2260 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2261 *** rcirc-activity-hooks -> rcirc-activity-functions
2262 *** rcirc-print-hooks -> rcirc-print-functions
2263 *** dbus-event-error-hooks -> dbus-event-error-functions
2264 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2265 *** checkdoc-style-hooks -> checkdoc-style-functions
2266 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2267 *** archive-extract-hooks -> archive-extract-hook
2268 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2269 *** hfy-post-html-hooks -> hfy-post-html-hook
2270 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2271 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2272 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2273 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2275 ** Obsolete packages
2278 In most cases, assoc+member+push+delq work just as well.
2279 And in any case it's just a terrible package: ugly semantics, terrible
2280 inefficiency, and not namespace-clean.
2289 * Incompatible Lisp Changes in Emacs 24.3
2291 ** Docstrings starting with `*' no longer indicate user options.
2292 Only variables defined using `defcustom' are considered user options.
2293 The function `user-variable-p' is now an obsolete alias for
2294 `custom-variable-p'.
2296 ** The return values of `defalias', `defun' and `defmacro' have changed,
2297 and are now undefined. For backwards compatibility, `defun' and
2298 `defmacro' currently return the name of the newly defined
2299 function/macro, but this should not be relied upon.
2301 ** `random' by default now returns a different random sequence in
2302 every Emacs run. Use `(random S)', where S is a string, to set the
2303 random seed to a value based on S, in order to get a repeatable
2304 sequence in later calls.
2306 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2307 that substring is inserted literally even if the LITERAL arg is
2308 non-nil, instead of causing an error to be signaled.
2310 ** `select-window' now always makes the window's buffer current.
2311 It does so even if the window was selected before.
2313 ** The function `x-select-font' can return a font spec, instead of a
2314 font name as a string. Whether it returns a font spec or a font name
2315 depends on the graphical library.
2317 ** `face-spec-set' no longer sets frame-specific attributes when the
2318 third argument is a frame (that usage was obsolete since Emacs 22.2).
2320 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2322 ** The CL package's `get-setf-method' function no longer exists.
2323 Generalized variables are now part of core Emacs Lisp, and implemented
2324 differently to the way cl.el used to do it. It is not possible to
2325 define a compatible replacement for `get-setf-method'. See the file
2326 gv.el for internal details of the new implementation.
2328 ** The arguments of `dbus-register-signal' are no longer just strings,
2329 but keywords or keyword-string pairs. The old argument list will
2330 still be supported for Emacs 24.x.
2332 ** Miscellaneous name changes
2333 Some Lisp symbols have been renamed to correct their spelling,
2334 or to be more consistent with standard Emacs terminology.
2336 *** Renamed functions
2337 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2338 **** inactivate-input-method -> deactivate-input-method
2339 **** quail-inactivate -> quail-deactivate
2340 **** robin-inactivate -> robin-deactivate
2341 **** viper-inactivate-input-method -> viper-deactivate-input-method
2342 **** viper-inactivate-input-method-action ->
2343 viper-deactivate-input-method-action
2344 **** ucs-input-inactivate -> ucs-input-deactivate
2347 The old hooks are still supported for backward compatibility, but they
2348 are deprecated and will be removed eventually.
2349 **** input-method-inactivate-hook -> input-method-deactivate-hook
2350 **** robin-inactivate-hook -> robin-deactivate-hook
2351 **** quail-inactivate-hook -> quail-deactivate-hook
2353 *** Renamed variables
2354 **** follow-deactive-menu -> follow-inactive-menu
2355 **** inactivate-current-input-method-function ->
2356 deactivate-current-input-method-function
2358 ** Some obsolete functions, variables, and faces have been removed:
2359 *** `last-input-char', `last-command-char', `unread-command-char'
2360 *** `facemenu-unlisted-faces'
2361 *** `rmail-decode-mime-charset'
2362 *** `iswitchb-read-buffer'
2363 *** `sc-version', `sc-submit-bug-report'
2364 *** `set-char-table-default'
2365 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2366 *** `compile-internal'
2368 *** `mode-line-inverse-video'
2369 *** `follow-mode-off-hook'
2370 *** `cvs-commit-buffer-require-final-newline'
2371 (use `log-edit-require-final-newline' instead)
2372 *** `cvs-changelog-full-paragraphs'
2373 (use `log-edit-changelog-full-paragraphs' instead)
2374 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2375 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2376 *** `vc-master-templates' (use `vc-handled-backends' instead)
2377 *** `vc-checkout-carefully'
2380 * Lisp Changes in Emacs 24.3
2382 ** CL-style generalized variables are now in core Elisp.
2383 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2384 You can define your own generalized variables using `gv-define-simple-setter',
2385 `gv-define-setter', etc.
2387 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2388 This can significantly speed up execution of non-byte-compiled code,
2389 but can also bump into previously unnoticed cyclic dependencies.
2390 These are generally harmless: they will simply cause the macro calls
2391 to be left for later expansion (as before), but will result in a
2392 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2393 You may wish to restructure your code so this does not happen.
2395 ** New sampling-based Elisp profiler.
2396 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2397 When finished, use M-x profiler-stop. The sampling rate can be based on
2398 CPU time or memory allocations.
2400 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2401 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2403 ** New macros `setq-local' and `defvar-local'.
2405 ** Face underlining can now use a wave.
2407 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2408 of `read-regexp' accepts a string ending with a colon and space, and its
2409 second argument DEFAULTS can be a list of strings accessible via `M-n'
2410 in the minibuffer ahead of other hard-coded useful regexp-related values.
2411 More commands use `read-regexp' now to read their regexp arguments.
2415 *** New function `completion-table-with-quoting' to handle completion
2416 in the presence of quoting, such as file completion in shell buffers.
2418 *** New function `completion-table-subvert' to use an existing completion
2419 table, but with a different prefix.
2423 *** New error type and new function `user-error'.
2424 These do not trigger the debugger.
2426 *** New option `debugger-bury-or-kill', saying what to do with the
2427 debugger buffer when exiting debug.
2429 *** Set `debug-on-message' to enter the debugger when a certain
2430 message is displayed in the echo area. This can be useful when trying
2431 to work out which code is doing something.
2433 *** New var `inhibit-debugger', automatically set to prevent accidental
2434 recursive invocations.
2438 *** New command `fit-frame-to-buffer' adjusts the frame height to
2441 *** The command `fit-window-to-buffer' can adjust the frame height
2442 if the new option `fit-frame-to-buffer' is non-nil.
2444 *** New macro `with-temp-buffer-window', similar to
2445 `with-output-to-temp-buffer'.
2447 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2450 *** New option `switch-to-buffer-preserve-window-point' to restore a
2451 window's point when switching buffers.
2453 *** New display action alist entries `window-height' and `window-width'
2454 specify the size of new windows created by `display-buffer'.
2456 *** New display action alist entry `pop-up-frame-parameters', if
2457 non-nil, specifies frame parameters to give any newly-created frame.
2459 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2460 tells display action functions to avoid changing which frame is
2463 *** New display action alist entry `previous-window', if non-nil,
2464 specifies window to reuse in `display-buffer-in-previous-window'.
2466 *** New display action functions `display-buffer-below-selected',
2467 and `display-buffer-in-previous-window'.
2469 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2470 now accept a third argument to avoid choosing the selected window.
2472 *** Additional values recognized for option `window-combination-limit'.
2474 *** The following variables are obsolete, as they can be replaced by
2475 appropriate entries in the `display-buffer-alist' function introduced
2477 **** `dired-shrink-to-fit'
2478 **** `display-buffer-reuse-frames'
2479 **** `display-buffer-function'
2480 **** `special-display-buffer-names'
2481 **** `special-display-frame-alist'
2482 **** `special-display-function'
2483 **** `special-display-regexps'
2487 *** `current-time-string' no longer requires that its argument's year
2488 must be in the range 1000..9999. It now works with any year supported
2489 by the underlying C implementation.
2491 *** `current-time' now returns extended-format time stamps
2492 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2493 PSEC is typically a multiple of 1000 on current machines. Other
2494 functions that use this format, such as `file-attributes' and
2495 `format-time-string', have been changed accordingly. Old-format time
2496 stamps are still accepted.
2498 *** The format of timers in `timer-list' and `timer-idle-list' is now
2499 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2500 The PSECS slot is new, and uses picosecond resolution. It can be
2501 accessed via the new `timer--psecs' accessor.
2503 *** Last-modified time stamps in undo lists now are of the form
2504 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2508 *** Improved security when handling persistent objects:
2510 **** `eieio-persistent-read' now features optional arguments for specifying
2511 the class to load, as well as a flag stating whether subclasses are allowed;
2512 if provided, other classes will be rejected by the reader. For
2513 compatibility with existing code, if the class is omitted only a
2516 **** New specialized reader for pulling in classes and signaling errors
2517 without evaluation of suspicious code.
2519 **** All slots that contain objects must have a :type. Slots with lists
2520 of objects must use a new type predicate for a list of an object type.
2522 *** Support for `find-function' and similar utilities, through the addition
2523 of filename support to generated symbols.
2525 ** Floating point functions now always return special values like NaN,
2526 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2527 Previously, they returned NaNs on some platforms but signaled errors
2528 on others. The affected functions are acos, asin, tan, exp, expt,
2529 log, log10, sqrt, and mod.
2531 ** New fringe bitmap `exclamation-mark'.
2533 ** Miscellaneous changes to special forms and macros
2535 *** `defun' and `defmacro' are now macros rather than special forms.
2537 *** `kbd' is now a function rather than a macro.
2539 ** Miscellaneous new functions
2541 *** `set-temporary-overlay-map' sets up a temporary keymap that
2542 takes precedence over most other maps for a short while (normally one key).
2544 *** `autoloadp' tests if its argument is an autoloaded object.
2546 *** `autoload-do-load' performs the autoloading operation.
2548 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2550 *** `file-name-base' returns a file name sans directory and extension.
2552 *** `function-get' fetches a function property, following aliases.
2554 *** `posnp' tests if an object is a `posn'.
2556 *** `system-users' returns the user names on the system.
2558 *** `system-groups' returns the group names on the system.
2560 *** `tty-top-frame' returns the topmost frame of a text terminal.
2562 ** The following functions and variables are obsolete:
2563 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2564 *** `buffer-has-markers-at'
2565 *** `macro-declaration-function' (use `macro-declarations-alist')
2566 *** `window-system-version' (provides no useful information)
2567 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2568 *** `query-replace-interactive'
2569 *** `font-list-limit' (has had no effect since Emacs < 23)
2572 * Changes in Emacs 24.3 on Non-Free Operating Systems
2574 ** Cygwin builds can use the native MS Windows user interface.
2575 Pass `--with-w32' to configure. The default remains the X11 interface.
2577 ** Two new functions are available in Cygwin builds:
2578 `cygwin-convert-file-name-from-windows' and
2579 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2580 code to access the Cygwin file-name mapping machinery to convert
2581 between Cygwin and Windows-native file and directory names.
2583 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2584 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2585 `mouse-autoselect-window'.
2587 ** On MS Windows Vista and later Emacs now supports symbolic links.
2589 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2590 support for libxml2, even if its presence is detected.
2592 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2594 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2595 directories to the search path. You must add them yourself if you want them.
2598 * Changes in Emacs 24.2
2600 ** This is mainly a bug-fix release.
2603 * Installation Changes in Emacs 24.1
2605 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2606 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2607 also depend on Gtk+. You can disable them with --without-rsvg and
2610 ** Emacs can be compiled with GnuTLS support.
2611 This happens by default if a suitably recent version of the library is
2612 found at build time. To prevent this, use the configure option
2613 `--without-gnutls'. See below for GnuTLS features.
2615 ** Emacs can be compiled with SELinux support.
2616 This happens by default if a suitably recent version of the library is
2617 found at build time. To prevent this, use the configure option
2618 `--without-selinux'. See below for SELinux features.
2620 ** Emacs can be compiled with ImageMagick support.
2621 This happens by default if a suitably recent version of the library is
2622 found at build time. To prevent this, use the configure option
2623 `--without-imagemagick'. See below for ImageMagick features.
2624 This feature is not available for the Nextstep or MS ports.
2626 ** Emacs can be compiled with libxml2 support.
2627 This happens by default if a suitably recent version of the library is
2628 found at build time. To prevent this, use the configure option
2629 `--without-xml2'. See below for libxml2 features.
2631 ** By default, the installed Info and man pages are compressed.
2632 You can disable this by configuring --without-compress-info.
2634 ** New configure option --with-wide-int.
2635 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2636 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2639 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2640 These provide no new functionality, they just remove the need to edit
2641 lib-src/Makefile by hand in order to use the associated features.
2643 ** New configure option --enable-use-lisp-union-type.
2644 This is only useful for Emacs developers to debug certain types of bugs.
2645 This is not a new feature; only the configure flag is new.
2647 ** The standalone programs digest-doc and sorted-doc are removed.
2648 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2650 ** The standalone program `fakemail' is removed.
2651 If you need it, feedmail.el provides a superset of the functionality.
2654 * Startup Changes in Emacs 24.1
2656 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2657 command line arguments, and the EMACS_UNIBYTE environment variable, no
2658 longer have any effect. (They were declared obsolete in Emacs 23.)
2660 ** New command line option `--no-site-lisp' removes site-lisp directories
2661 from load-path. -Q now implies this. This option does not affect the
2662 EMACSLOADPATH environment variable (and hence has no effect for
2666 * Changes in Emacs 24.1
2670 *** Many packages now use the `completion-at-point' command,
2671 rather than implementing separate completion commands.
2673 *** `completion-at-point' now handles tags and semantic completion.
2675 *** Completion in a non-minibuffer now tries to detect the end of completion
2676 and pops down the *Completions* buffer accordingly.
2678 *** New option `completion-cycle-threshold' allows completion cycling.
2680 *** New option `completion-category-overrides' for overriding the
2681 default completion style in certain circumstances.
2683 *** New completion style `substring'.
2685 *** Completion of buffer names uses `substring' completion by default.
2687 *** The option `widget-complete-field' has been removed.
2691 *** The first time you try sending mail, Emacs asks for a mail method.
2692 This is implemented by a new default for `send-mail-function', which
2693 is `sendmail-query-once'. This offers to use the smtpmail package, or
2694 to use the old defaults relying on external mail facilities
2695 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2696 `mailclient-send-it' on Windows).
2698 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2699 transfers the report to your desktop's preferred mail client, if there
2700 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2703 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2704 and Mail mode changes
2706 ** Emacs server and client changes
2708 *** New option `server-port' specifies the port for TCP Emacs servers.
2710 *** New emacsclient argument -q/--quiet suppresses some status messages.
2712 *** New emacsclient argument --frame-parameters specifies the frame
2713 parameters of any newly-created graphical frame.
2715 *** If emacsclient shuts down due to Emacs signaling an error,
2716 its exit status is 1.
2718 *** New emacsclient argument --parent-id ID.
2719 This opens a client frame in parent X window ID, via XEmbed, similar
2720 to the --parent-id argument to Emacs.
2722 ** Internationalization changes
2724 *** Emacs now supports display and editing of bidirectional text.
2725 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2726 displayed in the correct visual order as expected by users of those
2727 scripts. The display reordering is a "full bidirectionality" class
2728 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2729 with no RTL text should look exactly the same as before.
2731 **** New buffer-local variable `bidi-display-reordering'.
2732 To disable display reordering in a buffer, change this to nil.
2734 **** New buffer-local variable `bidi-paragraph-direction'.
2735 If nil (the default), Emacs determines the base direction of each
2736 paragraph from its text, as specified by the UBA. Setting the value
2737 to `right-to-left' or `left-to-right' forces a base direction on each
2740 Paragraphs with right-to-left base direction are displayed starting at
2741 the right window edge.
2743 *** Enhanced support for characters with no glyphs in available fonts,
2744 or, on text terminals, characters that cannot be encoded by the
2745 terminal coding system. The new option `glyphless-char-display-control'
2746 specifies how to display them: as a hexadecimal code in a box, a thin
2747 1-pixel space, an empty box, etc.
2749 *** New input methods for Farsi and Bulgarian
2750 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2752 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2753 (U+2010 and U+2011).
2755 *** New Hebrew translation of the Emacs Tutorial.
2756 Type `C-u C-h t' to choose it in case your language setup doesn't
2757 automatically select it.
2759 ** An Emacs Lisp package manager is now included.
2760 This is a convenient way to download and install additional packages,
2761 from a package repository at http://elpa.gnu.org.
2763 *** M-x list-packages shows a list of packages, which can be
2764 selected for installation.
2766 *** New command `describe-package', bound to `C-h P'.
2768 *** By default, all installed packages are loaded automatically when
2769 Emacs starts up. To disable this, set `package-enable-at-startup' to
2770 nil. To specify the packages to load, customize `package-load-list'.
2772 ** Custom theme changes
2774 *** New command `M-x customize-themes', which provides a convenient
2775 interface for enabling and disabling Custom themes.
2777 *** New option `custom-theme-load-path' is the load path for themes.
2778 Emacs no longer looks for Custom themes in `load-path'. The default
2779 value of `custom-theme-load-path' says to look for themes in
2780 `custom-theme-directory', followed by a subdirectory of
2781 `data-directory' named "themes/", which contains a small selection of
2782 built-in Custom themes.
2784 *** New option `custom-safe-themes' records known-safe theme files.
2785 If a theme is not in this list, Emacs queries before loading it, and
2786 offers to save the theme to `custom-safe-themes' automatically. By
2787 default, all themes included in Emacs are treated as safe.
2789 ** Improved GTK integration
2791 *** GTK scroll-bars are now placed on the right by default.
2792 The function `set-scroll-bar-mode' can change this.
2794 *** GTK tool bars can have just text, just images or images and text.
2795 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2796 the default is taken from desktop settings.
2798 *** GTK tool bars can be placed on any edge of the frame.
2799 The frame-parameter tool-bar-position controls this. It takes the
2800 values top, left, right or bottom. The Options => Show/Hide menu has
2803 *** The default colors for selected text (the `region' face) are taken
2804 from the GTK theme when Emacs is built with GTK.
2806 *** Emacs uses GTK tooltips by default if built with GTK.
2807 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2809 ** Graphical interface changes
2811 *** On graphical displays, the mode-line no longer ends in dashes.
2812 Also, the first dash (which does not indicate anything) is just
2813 displayed as a space.
2815 *** `menu-bar-select-buffer-function' lets you choose another operation
2816 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2818 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2819 built with Xft. These fonts can be set via X resources, for example:
2820 Emacs.pane.menubar.font: Courier-12
2824 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2825 or if it receives a SIGINT signal in batch mode.
2827 *** `kill-emacs-hook' is now also run in batch mode.
2828 Third-party code which adds to `kill-emacs-hook' should check if they
2829 do the right thing in batch mode.
2831 ** Scrolling changes
2833 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2834 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2835 of buffer at first key-press (instead they move to top/bottom of buffer)
2836 when `scroll-error-top-bottom' is non-nil.
2838 *** New option `scroll-error-top-bottom' (see above).
2840 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2841 scroll a line instead of full screen.
2843 *** New property `scroll-command' should be set on a command's symbol to
2844 define it as a scroll command affected by `scroll-preserve-screen-position'.
2846 *** If you customize `scroll-conservatively' to a value greater than 100,
2847 Emacs will never recenter point in the window when it scrolls due to
2848 cursor motion commands or commands that move point (e.f., `M-g M-g').
2849 Previously, you needed to use `most-positive-fixnum' as the value of
2850 `scroll-conservatively' to achieve the same effect.
2852 *** "Aggressive" scrolling now honors the scroll margins.
2853 If you customize `scroll-up-aggressively' or
2854 `scroll-down-aggressively' and move point off the window, Emacs now
2855 scrolls the window so as to avoid positioning point inside the scroll
2858 ** Basic SELinux support has been added.
2859 This requires Emacs to be linked with libselinux at build time.
2861 *** Emacs preserves the SELinux file context when backing up.
2862 Also, the function `copy-file' has an extra optional argument for
2863 preserving SELinux context, and the return value of `backup-buffer'
2864 now includes the SELinux context.
2866 *** New functions `file-selinux-context' and `set-file-selinux-context'
2867 get and set the SELinux context of a file.
2871 *** `delete-by-moving-to-trash' now only affects commands that specify
2872 trashing. This avoids inadvertently trashing temporary files.
2874 *** Calling `delete-file' or `delete-directory' with a prefix argument
2875 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2877 ** File- and directory-local variable changes
2879 *** You can stop directory local vars from applying to subdirectories.
2880 Add an element (subdirs . nil) to the alist portion of any variables
2881 settings to indicate that the section should not apply to
2884 *** Directory local variables can apply to some file-less buffers.
2885 Affected modes include dired, vc-dir, and log-edit. For example,
2886 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2887 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2888 `hack-dir-local-variables-non-file-buffer' to support this.
2890 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2891 Instead, use "eval: (minor-mode 1)".
2893 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2894 to `inhibit-local-variables-regexps'. As the name suggests, it now
2895 applies to ALL file local variables, not just -*- lines. The
2896 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2901 *** The `quit-window' command now restores the last buffer displayed
2902 in the quitted window.
2904 *** Resizing an Emacs frame now preserves proportional window sizes,
2905 modulo restrictions like window minimum sizes and fixed-size windows.
2907 *** The behavior of `display-buffer' is now customizable in detail.
2909 **** New option `display-buffer-base-action' specifies a list of
2910 user-determined display "actions" (functions and optional arguments
2911 for choosing the displaying window).
2913 This takes precedence over the default display action, which is
2914 specified by `display-buffer-fallback-action'.
2916 **** New option `display-buffer-alist' maps buffer name regexps to
2917 display actions, taking precedence over `display-buffer-base-action'.
2919 *** New option `window-combination-limit'.
2920 The new option `window-combination-limit' allows to return the space
2921 obtained for resizing or creating a window more reliably to the window
2922 from which such space was obtained.
2924 *** New option `window-combination-resize'.
2925 The new option `window-combination-resize' allows to split a window that
2926 otherwise cannot be split because it's too small by stealing space from
2927 other windows in the same combination. Subsequent resizing or deletion
2928 of the window will resize all windows in the same combination as well.
2930 *** New option `frame-auto-hide-function' lets you choose between
2931 iconifying or deleting a frame when burying a buffer in a dedicated
2932 frame, or quitting a window showing a buffer in a frame of its own.
2934 *** New commands `maximize-window' and `minimize-window'.
2935 These maximize and minimize the size of a window within its frame.
2937 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2938 These functions allow to navigate through the live buffers that have
2939 been shown in a specific window.
2941 ** Minibuffer changes
2943 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2944 This is handy for minibuffer-only frames, and is also used for the feature
2945 where mouse-1 pops up *Messages*"', which can now easily be changed.
2947 *** Minibuffers set `truncate-lines' to nil.
2948 If you want to change the value to something else, you could use
2949 for example `minibuffer-setup-hook'.
2951 ** `auto-mode-case-fold' is now enabled by default.
2953 ** `backup-by-copying-when-mismatch' now defaults to t.
2955 ** New basic faces `error', `warning', `success'.
2956 These are used to highlight text indicating failure, caution or
2957 successful operation.
2959 ** New option `list-colors-sort' defines the color sort order
2960 for `list-colors-display'.
2962 ** The variable `focus-follows-mouse' now always defaults to nil.
2965 * Editing Changes in Emacs 24.1
2969 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2970 `isearch-yank-line'.
2972 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2973 `isearch-yank-kill'.
2975 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2977 ** New commands `count-words-region' and `count-words'.
2979 *** M-= is bound to `count-words-region', not `count-lines-region'.
2980 The `count-words-region' command, when called interactively, reports
2981 the number of lines, words, and characters in the region. It is a
2982 superset of the old `count-lines-region', which is now an obsolete
2985 ** The command `just-one-space' (M-SPC), if given a negative argument,
2986 also deletes newlines around point.
2990 *** New option `delete-active-region'.
2991 If non-nil, [delete] and DEL delete the region if it is active and no
2992 prefix argument is given. If set to `kill', those commands kill
2995 *** New command `delete-forward-char', bound to [delete].
2996 This is meant for interactive use, and obeys `delete-active-region'.
2997 The command `delete-char' does not obey `delete-active-region'.
2999 *** `delete-backward-char' is now a Lisp function.
3000 Apart from obeying `delete-active-region', its behavior is unchanged.
3001 However, the byte compiler now warns if it is called from Lisp; Lisp
3002 callers should use delete-char with a negative argument instead.
3004 *** The option `mouse-region-delete-keys' has been deleted.
3006 ** Selection changes.
3008 The default handling of clipboard and primary selections has been
3009 changed to conform with modern X applications. In short, most
3010 commands for killing and yanking text now use the clipboard, while
3011 mouse commands use the primary selection.
3013 In the following, we provide a list of these changes, followed by a
3014 list of steps to get the old behavior back if you prefer that.
3016 *** `select-active-regions' now defaults to t.
3017 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3018 the kill ring. The selected text is put in the primary selection, if
3019 the system possesses a separate primary selection facility (e.g. X).
3021 **** `select-active-regions' also accepts a new value, `only'.
3022 This means to only set the primary selection for temporarily active
3023 regions (usually made by mouse-dragging or shift-selection);
3024 "ordinary" active regions, such as those made with C-SPC followed by
3025 point motion, do not alter the primary selection.
3027 **** `mouse-drag-copy-region' now defaults to nil.
3029 *** mouse-2 is now bound to `mouse-yank-primary'.
3030 This pastes from the primary selection, ignoring the kill-ring.
3031 Previously, mouse-2 was bound to `mouse-yank-at-click'.
3033 *** `x-select-enable-clipboard' now defaults to t on all platforms.
3035 *** `x-select-enable-primary' now defaults to nil.
3036 Thus, commands that kill text or copy it to the kill-ring (such as
3037 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3039 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3040 exactly equivalent to M-w, C-w, and C-y respectively.
3042 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
3043 non-nil by default, as Windows does not support the primary selection
3044 between applications.
3046 *** To return to the previous behavior, do the following:
3048 **** Change `select-active-regions' to nil.
3049 **** Change `mouse-drag-copy-region' to t.
3050 **** Change `x-select-enable-primary' to t (on X only).
3051 **** Change `x-select-enable-clipboard' to nil.
3052 **** Bind `mouse-yank-at-click' to mouse-2.
3054 *** Support for X cut buffers has been removed.
3056 *** X clipboard managers are now supported.
3057 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3059 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3060 in the current rectangle. With a prefix argument, this prompts for a
3061 number to count from and for a format string.
3063 ** `redisplay-dont-pause' now defaults to t.
3064 This makes Emacs feel more responsive to editing commands that arrive
3065 at high rate, e.g. if you lean on some key, because stopping redisplay
3066 in the middle (when this variable is nil) forces more expensive
3067 updates later on, and Emacs appears to be unable to keep up.
3069 ** The behavior of <TAB> for active regions in Text mode has changed.
3070 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3071 when the region is active causes Emacs to indent all the lines in the
3072 region, aligning them with the line previous to the first line in the
3073 region (or with the left margin if there is no previous line).
3075 ** When `occur' is called with a prefix argument, matching strings are
3076 collected into the `*Occur*' buffer without line numbers. If there
3077 are parenthesized subexpressions in the specified regexp, `occur'
3078 reads replacement text that may contain \\& and \\N whose convention
3079 follows `replace-match'.
3082 * Changes in Specialized Modes and Packages in Emacs 24.1
3084 ** Archive Mode has basic support for browsing and updating 7z archives.
3088 *** BibTeX mode now supports biblatex.
3089 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3090 `bibtex-entry-field-alist' is now an obsolete alias for
3091 `bibtex-BibTeX-entry-alist'.
3093 *** New command `bibtex-search-entries', bound to C-c C-a.
3095 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3097 *** New variable `bibtex-search-entry-globally'.
3101 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3103 *** The default browser used by the package is now the "xdg-open" program,
3104 on platforms that support it. This calls your desktop's preferred browser.
3108 *** Support for musical notes.
3110 *** Support for logarithmic units.
3112 *** No longer uses the tex prefix for TeX specific unit names when
3113 using TeX or LaTeX mode.
3115 *** New option to highlight selections using faces.
3117 *** `calc-histogram' has the option of using a vector to determine the bins.
3119 *** New "O" option prefix.
3121 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3123 ** Calendar, Diary, and Appt
3125 *** Diary entries can contain non-printing "comments".
3126 See the variable `diary-comment-start'.
3128 *** Appointments can specify their individual warning times.
3129 See the variable `appt-warning-time-regexp'.
3131 *** The function specified by `appt-disp-window-function' may be passed
3132 lists of arguments if multiple appointments are due at similar times.
3133 If you are using a custom function for this, you should update it.
3135 *** New function `diary-hebrew-birthday'.
3137 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3138 may no longer be nil, but must all be strings.
3140 *** The obsolete (since Emacs 22.1) method of enabling the appt
3141 package by adding `appt-make-list' to `diary-hook' has been removed.
3142 Use `appt-activate' instead.
3144 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3145 appt-issue-message (use the function appt-activate)
3146 appt-visible/appt-msg-window (use the variable appt-display-format)
3148 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3149 view-diary-entries, list-diary-entries, show-all-diary-entries
3153 *** New feature to "guess" the style in an existing buffer.
3154 The main entry point is M-x c-guess.
3156 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3158 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3159 Thus C-M-a will, by default, go to the beginning of the immediate function,
3162 *** "Macros with semicolons" can be registered for correct indentation.
3163 Where such a macro ends a line (no semicolon) the next statement is no longer
3164 parsed as a statement continuation.
3166 ** Comint and modes derived from it use the standard completion code.
3170 *** Compilation mode can be used without Font Lock mode.
3171 `compilation-parse-errors-function' is now obsolete.
3173 *** New variable `compilation-filter-start', which is bound while
3174 `compilation-filter-hook' runs. It records the start position of the
3175 text inserted by `compilation-filter'.
3177 *** `compilation-error-screen-columns' and `compilation-first-column'
3178 are obeyed in the editing buffer. So programming language modes can
3179 set them, whereas previously only the value in the *Compilation*
3184 *** Customize buffers now contain a search field.
3185 The search is performed using `customize-apropos'.
3186 To turn off the search field, set `custom-search-field' to nil.
3188 *** Options in customize group buffers start out hidden if not customized.
3189 Use the arrow to the left of the option name to toggle visibility.
3191 *** custom-buffer-sort-alphabetically now defaults to t.
3193 *** The color widget now has a "Choose" button, which allows you to
3194 choose a color via `list-colors-display'.
3198 *** It is now possible to access buses other than the default system
3201 *** The `dbus-register-method' and `dbus-register-property' functions
3202 optionally do not register names.
3204 *** The new function `dbus-register-service' registers a known service
3205 name on a D-Bus without also registering a property or a method.
3209 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3210 if called with a prefix argument, read a file name from the minibuffer
3211 instead of using the current buffer.
3213 *** The "dired local variables" feature of Dired-x is obsolete.
3214 The standard directory local variables feature replaces it.
3218 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3219 controlling attempts to autojoin a channel.
3221 *** New variable `erc-coding-system-precedence': If we use `undecided'
3222 as the server coding system, this variable will then be consulted.
3223 The default is to decode strings that can be decoded as utf-8 as
3224 utf-8, and do the normal `undecided' decoding for the rest.
3228 *** The default value of `eshell-directory-name' has changed
3229 to be an "eshell" directory in `user-emacs-directory'.
3230 The old "~/.eshell/" directory is still used if it exists, though.
3234 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3235 It now supports multithread non-stop debugging and simultaneous
3236 debugging of several threads.
3240 *** RET (`image-toggle-animation') toggles animation, if applicable.
3241 Animation plays once, unless the option `image-animate-loop' is non-nil.
3245 *** New command M-x info-display-manual displays a named Info manual.
3246 If that manual is already visited in some Info buffer, it displays
3247 that buffer. (This is handy if you have many manuals in many *info*
3248 buffers, and don't remember the name of the buffer visiting the manual
3249 you want to consult.) Otherwise, it loads and displays the manual.
3251 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3252 This is for compatibility with the stand-alone Info reader program,
3253 and also because `Info-edit' is a rarely used command that is disabled
3256 ** Mail mode changes (not Message mode)
3258 *** New command M-x mail-add-attachment for adding MIME attachments
3260 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3261 (Its name is misleading, since it has nothing to do with MIME
3262 attachments.) The old name is now an obsolete alias to the new name.
3264 ** MH-E has been updated to MH-E version 8.3.1.
3265 See MH-E-NEWS for details.
3267 ** Modula-2 mode provides auto-indentation.
3269 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3271 ** nXML mode no longer binds C-RET to `nxml-complete'.
3272 Completion is now performed via `completion-at-point', bound to C-M-i
3273 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3274 default), this performs tag completion.
3276 ** Org mode has been updated to version 7.8.09.
3277 See ORG-NEWS for details.
3279 ** Prolog mode has been completely revamped, with lots of additional
3280 functionality such as more intelligent indentation, electricity,
3281 support for more variants, including Mercury, and a lot more.
3285 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3286 in the Rmail incoming message.
3288 *** The variable `rmail-message-filter' no longer has any effect.
3289 This change was made in Emacs 23.1 but was not advertised at the time.
3290 Try using `rmail-show-message-hook' instead.
3294 *** M-x shell prompts for the shell path name if the default directory
3295 is a remote file name and neither the environment variable $ESHELL nor
3296 the variable `explicit-shell-file-name' is set.
3298 *** TAB is now bound to the standard `completion-at-point' command,
3299 which now implements the pcomplete rules for shell command completion.
3303 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3304 if the mail server supports them. This uses either built-in GnuTLS
3305 support, or the starttls.el library. Customize `smtpmail-stream-type'
3308 *** The variable `smtpmail-auth-credentials' has been removed.
3309 By default, the information is now stored in the file ~/.authinfo.
3310 This was the default value of smtpmail-auth-credentials. If you had
3311 customized smtpmail-auth-credentials to a list of user names and
3312 passwords, those settings are not used. During your first connection
3313 to the smtp server, Emacs will prompt for the user name and password,
3314 and offer to save them to ~/.authinfo. Or you can manually copy the
3315 credentials to ~/.authinfo. For example, if you had
3317 (setq smtpmail-auth-credentials
3318 '(("mail.example.org" 25 "jim" "s!cret")))
3320 then the equivalent line in ~/.authinfo would be
3322 machine mail.example.org port 25 login jim password s!cret
3324 See the auth-source manual for more information, e.g. on encrypting
3325 the credentials file.
3327 *** The variable `smtpmail-starttls-credentials' has been removed.
3328 If you had that set, you need to put
3330 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3332 in your ~/.authinfo file instead.
3334 *** SMTPmail defaults to using the address in the From: header as the
3335 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3336 to the address you wish to use instead.
3340 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3341 and `sql-oracle-scan-on'.
3343 *** New options controlling prompting for login parameters.
3344 Each supported product has a custom variable `sql-*-login-params',
3345 which is a list of the parameters to be prompted for before a
3346 connection is established.
3348 *** The command `sql-product-interactive' now takes a prefix argument,
3349 which causes it to prompt for an SQL product.
3351 *** Product-specific SQL interactive commands now take prefix arguments.
3352 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3353 given a prefix argument, prompt for a name for the SQL interactive
3354 buffer. This reduces the need for calling `sql-rename-buffer'.
3356 *** SQL interactive modes suppress command continuation prompts, and
3357 replace tabs with spaces. The first change impacts multiple line SQL
3358 statements entered with C-j between each line, statements yanked into
3359 the buffer and statements sent with `sql-send-*' functions. The
3360 second prevents the MySQL and Postgres interpreters from listing
3361 object name completions when sent text via `sql-send-*' functions.
3363 *** New command `sql-connect' starts a predefined SQLi session,
3364 using the login parameters from `sql-connection-alist'.
3366 *** New "Save Connection" menu item in SQLi buffers.
3367 This gathers the login params specified for the SQLi session, if it
3368 was not started by a connection, and saves them as a new connection.
3370 *** New commands for listing database objects and details:
3371 sql-list-all and sql-list-table.
3373 *** An API for manipulating SQL product definitions has been added.
3377 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3381 *** New inline access method "ksu" (kerberized su).
3383 *** The following access methods are discontinued: "ssh1_old",
3384 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3386 *** The user option `remote-file-name-inhibit-cache' controls whether
3387 remote file attributes are cached for better performance.
3389 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3390 default value to "".
3392 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3393 for remote machines which support SELinux.
3395 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3396 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3397 the degree of parallelism.
3399 ** VC and related modes
3401 *** Support for pulling on distributed version control systems.
3402 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3403 supported (currently with Bzr, Git, and Mercurial), to update the
3404 current branch and working tree. A prefix argument means to prompt
3405 the user for specifics, e.g. a pull location.
3407 *** `vc-update' is now an alias for `vc-pull'.
3409 *** Support for merging on distributed version control systems.
3410 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3411 is supported (currently with Bzr, Git, and Mercurial), to merge
3412 changes from another branch into the current one. It prompts for
3413 specifics, e.g. a merge source.
3415 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3416 shows a diff while querying the user. It defaults to t.
3418 *** Log entries in some Log View buffers can be toggled to display a
3419 longer description by typing RET (log-view-toggle-entry-display).
3420 This is currently supported for Bzr, Git, and Mercurial (to support
3421 another backend, define a `log-view-expanded-log-entry-function').
3422 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3423 use this to display the full log entry for the revision at point.
3425 *** New command `vc-ediff' allows visual comparison of two revisions
3426 of a file similar to `vc-diff', but using ediff backend.
3428 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3429 this was not advertised at the time.
3431 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3432 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3433 this was not advertised at the time.
3439 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3441 *** partial-completion-mode (complete.el) is obsolete.
3442 You can get a comparable behavior with:
3443 (setq completion-styles '(partial-completion initials))
3444 (setq completion-pcm-complete-word-inserts-delimiters t)
3446 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3448 *** pgg is obsolete (use EasyPG instead).
3450 *** sregex.el is obsolete, since rx.el is a strict superset.
3452 *** s-region.el and pc-select.el are obsolete.
3453 They are superseded by shift-select-mode, enabled by default since 23.1.
3455 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3459 *** The Landmark game is now invoked with `landmark', not `lm'.
3460 Its functions and variables have been similarly renamed.
3462 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3463 (This interfered with cua-mode.)
3465 *** f90.el has some support for Fortran 2008 syntax.
3467 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3469 *** New command `nato-region' converts text to NATO phonetic alphabet.
3472 * New Modes and Packages in Emacs 24.1
3474 ** Occur Edit mode applies edits made in *Occur* buffers to the
3475 original buffers. It is bound to "e" in Occur mode.
3477 ** New global minor mode electric-pair-mode.
3478 When enabled, typing an open parenthesis automatically inserts the
3479 matching closing one.
3481 ** New global minor mode electric-indent-mode.
3482 When enabled, typing certain characters triggers reindentation.
3483 Major modes wishing to use this can set electric-indent-chars or
3484 electric-indent-functions.
3486 ** New global minor mode electric-layout-mode.
3487 When enabled, typing certain characters automatically inserts newlines.
3488 Major modes wishing to use this can set electric-layout-rules.
3490 ** tabulated-list.el provides a generic major mode for tabulated data,
3491 from which other modes can be derived.
3493 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3495 ** secrets.el is an implementation of the Secret Service API, an
3496 interface to password managers like GNOME Keyring or KDE Wallet. The
3497 Secret Service API requires D-Bus for communication. The command
3498 `secrets-show-secrets' offers a buffer with a visualization of the
3501 ** notifications.el provides an implementation of the Desktop
3502 Notifications API. It requires D-Bus for communication.
3504 ** soap-client.el supports access to SOAP web services from Emacs.
3505 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3507 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3509 ** New emacs-lock.el package.
3510 The previous version has been moved to obsolete/old-emacs-lock.el.
3511 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3512 against exiting Emacs and killing the buffer can be set separately.
3513 The mechanism for automatically turning off protection for buffers
3514 with dead inferior processes has been generalized.
3517 * Incompatible Lisp Changes in Emacs 24.1
3519 ** Passing a nil argument to a minor mode function call now ENABLES
3520 the minor mode unconditionally. This is so that you can write e.g.
3522 (add-hook 'text-mode-hook 'foo-mode)
3524 to enable foo-mode in Text mode buffers, removing the need for
3525 `turn-on-foo-mode' style functions. This affects all mode commands
3526 defined by `define-minor-mode'. If called interactively, the mode
3527 command still toggles the minor mode.
3529 ** The return value of `backup-buffer' has changed.
3530 It is now a list of three elements, where the second element is a list
3531 describing the original file's SELinux context. If Emacs or the
3532 system lacks SELinux support, the context list is (nil nil nil nil).
3533 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3535 ** `char-direction-table' and the `char-direction' function were deleted.
3536 They were buggy and inferior to the new support of bidirectional
3537 editing introduced in Emacs 24. If you need the bidirectional
3538 properties of a character, use `get-char-code-property' with the last
3539 argument `bidi-class'.
3541 ** `copy-directory' now copies the source directory as a subdirectory
3542 of the target directory, if the latter is an existing directory. The
3543 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3544 the contents directly into a pre-existing target directory.
3546 ** For mouse click input events in the text area, the Y pixel
3547 coordinate in the POSITION list now counts from the top of the text
3548 area, excluding any header line. Previously, it counted from the top
3551 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3552 been further reduced. Now a backquote not followed by a space is
3553 always treated as a "new-style" backquote. Please remove all
3554 "old-style" backquotes from your code. If your code uses backquotes
3555 as documented in the Elisp manual, and compiles without warning, then
3556 you have nothing to do in this regard. Code not following the
3557 appropriate conventions may fail to compile.
3559 The most common cause of trouble seems to be an old-style backquote
3560 followed by a newline. Another cause of trouble is vector notation
3561 for key sequence notation: instead of [(control ,)] and [(control ')],
3562 you should write [(control ?,)] and [(control ?')], which will work in
3565 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3566 was not advertised at the time. The function `custom-initialize-delay'
3567 replaced all known uses.
3569 ** `view-buffer' now treats special mode-class in the same way that
3570 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3571 major mode is special).
3573 ** Menu and tool bar changes
3575 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3576 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3577 With these alist entries omitted, `make-frame' checks the value of the
3578 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3579 a menu-bar or tool-bar, respectively. If the alist entries are added,
3580 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3582 *** The menu bar bindings's caches are not used any more.
3583 Use (where-is-internal <def> nil t) instead.
3585 ** Regions created by mouse dragging are now normal active regions,
3586 similar to those created by shift-selection (see Selection changes
3587 above). In previous Emacs versions, these regions were delineated by
3588 `mouse-drag-overlay'; that variable has been removed.
3590 ** The fourth argument of `filter-buffer-substring' has been removed.
3591 If you want to remove text properties from the final result, simply
3592 pass the result through substring-no-properties.
3594 ** cl.el no longer provides `cl-19'.
3596 ** The following obsolete functions and aliases have been removed
3597 (the appropriate new function is given in parentheses; "not needed"
3598 means you can just remove all calls to the function in question):
3600 *** `comint-kill-output' (`comint-delete-output')
3601 *** `decompose-composite-char' (`char-to-string')
3602 *** `outline-visible' (`outline-invisible-p')
3603 *** `internal-find-face' (`facep')
3604 *** `internal-get-face' (`facep and check-face')
3605 *** `frame-update-faces' (not needed)
3606 *** `frame-update-face-colors' (`frame-set-background-mode')
3607 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3608 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3609 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3610 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3611 *** `x-make-font-unbold' (`make-face-unbold')
3612 *** `x-make-font-unitalic' (`make-face-unitalic')
3613 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3614 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3615 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3616 *** `char-bytes' (== 1)
3617 *** `isearch-return-char' (`isearch-printing-char')
3618 *** `make-local-hook' (not needed)
3619 *** `set-screen-height' (`set-frame-height')
3620 *** `set-screen-width' (`set-frame-width')
3622 ** The following obsolete variables and varaliases have been removed
3623 (the appropriate new variable is given in parentheses):
3625 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3626 *** `vc-header-alist' (`vc-BACKEND-header')
3627 *** `directory-sep-char' (== ?/)
3628 *** `font-lock-defaults-alist' (`font-lock-defaults')
3629 *** `e' (`float-e').
3631 ** The following obsolete files were removed:
3632 sc.el, x-menu.el, rnews.el, rnewspost.el
3634 ** The format of the finder-inf.el file has changed, since the Finder
3635 mechanism is now based on the package system. The variable
3636 `finder-package-info' is replaced by `package--builtins' and
3637 `finder-keywords-hash'.
3639 ** When generating autoloads, `update-directory-autoloads' no longer
3640 assumes every inspected file is in your `load-path'. It instead
3641 generates relative names according to the current `load-path'.
3644 * Lisp Changes in Emacs 24.1
3646 ** Code can now use lexical scoping by default instead of dynamic scoping.
3647 The `lexical-binding' variable enables lexical scoping for local
3648 variables. It is typically set via a file-local variable in the first
3649 line of the file, in which case it applies to all the code in that
3652 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3653 binding instead of the old dynamic binding mode.
3655 *** Lexically scoped interpreted functions are represented with a new form
3656 of function value which looks like (closure ENV ARGS &rest BODY).
3658 *** New macro `letrec' to define recursive local functions.
3660 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3661 So do `defcustom' and other forms that call `defvar' as a subroutine.
3663 *** New function `special-variable-p' to check whether a variable is
3664 declared as dynamically bound.
3666 *** The form ((lambda ...) ...) is deprecated.
3668 ** An Emacs Lisp testing tool is now included.
3669 Emacs Lisp developers can use this tool to write automated tests for
3670 their code. See the ERT info manual for details.
3672 ** Changes for bidirectional display and editing
3674 *** New function `current-bidi-paragraph-direction'.
3675 This returns the base direction of the paragraph at point.
3677 *** New function `bidi-string-mark-left-to-right'.
3678 Given a string containing characters from right-to-left scripts, this
3679 function returns another string which can be safely inserted into a
3680 buffer, such that any following text will be always displayed to the
3681 right of that string. (This works by appending an invisible Unicode
3682 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3684 This is useful when the buffer has overall left-to-right paragraph
3685 direction and you need to insert a string whose contents are not known
3686 in advance, without disrupting the layout of the line.
3690 *** Window tree functions are accessible in Elisp.
3691 Functions are provided to return the parent, siblings or child windows
3692 of any window including internal windows (windows not associated with a
3693 buffer) in the window tree.
3695 **** New function `window-valid-p' gives non-nil for live and internal
3698 **** Window manipulation can deal with internal windows.
3699 Many window handling functions like `split-window', `delete-window', or
3700 `delete-other-windows' as well as the window resizing functions can now
3701 act on any window including internal ones.
3703 *** window-total-height/-width vs window-body-height/-width.
3704 The function `window-height' has been renamed to `window-total-height'
3705 and `window-width' has been renamed to `window-body-width'. The old
3706 names are provided as aliases. Two new functions `window-total-width'
3707 and `window-body-height' are provided.
3709 *** Window parameters specific to window handling functions.
3710 For each window you can specify a parameter to override the default
3711 behavior of a number of functions like `split-window', `delete-window'
3712 and `delete-other-windows'. The variable `ignore-window-parameters'
3713 allows to ignore processing such parameters.
3715 *** New semantics of third argument of `split-window'.
3716 The third argument of `split-window' has been renamed to SIDE and can be
3717 set to any of the values 'below, 'right, 'above, or 'left to make the
3718 new window appear on the corresponding side of the window that shall be
3719 split. Any other value of SIDE will cause `split-window' to split the
3720 window into two side-by-side windows as before.
3722 *** Window resizing functions.
3723 A new standard function for resizing windows called `window-resize' has
3724 been introduced. This and all other functions for resizing windows no
3725 longer delete any windows when they become too small.
3727 *** Deleting the selected window now selects the most recently selected
3728 live window on that frame instead.
3730 *** `adjust-window-trailing-edge' adjustments.
3731 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3732 is able to resize other windows if a window adjacent to the trailing
3733 edge cannot be shrunk any more. This makes its behavior more similar to
3734 that of Emacs 21 without compromising, however, its inability to delete
3735 windows which was introduced in Emacs 22.
3737 *** Window-local buffer lists.
3738 Windows now have local buffer lists. This means that removing a buffer
3739 from display in a window will preferably show the buffer previously
3740 shown in that window with its previous window-start and window-point
3741 positions. This also means that the same buffer may be automatically
3742 shown twice even if it already appears in another window.
3744 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3745 which if non-nil requires the buffer to be displayed in the currently
3746 selected window, signaling an error otherwise. If nil, another window
3747 can be used, e.g. if the selected one is strongly dedicated.
3749 *** `split-window-vertically' and `split-window-horizontally' renamed
3750 to `split-window-below' and `split-window-right' respectively.
3751 The old names are kept as aliases.
3755 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3756 named ACTION, and takes a display action of the same form as
3757 `display-buffer-base-action' (see Changes, above). A non-nil,
3758 non-list value is treated specially, as the old meaning.
3760 **** New variable `display-buffer-overriding-action'.
3762 **** The procedure of `display-buffer' etc. to choose a window is
3763 determined by combining `display-buffer-overriding-action',
3764 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3765 and `display-buffer-fallback-action'. The second and fourth of these
3766 are user-customizable variables.
3768 See the docstring of `display-buffer' for details.
3770 *** New functions `window-state-get' and `window-state-put'.
3771 These functions allow to save and restore the state of an arbitrary
3772 frame or window as an Elisp object.
3776 *** New variable `completion-extra-properties' used to specify extra
3777 properties of the current completion:
3778 - :annotate-function, same as the old completion-annotate-function.
3779 - :exit-function, function to call after completion took place.
3781 *** Functions on `completion-at-point-functions' can return any of the
3782 properties valid for `completion-extra-properties'.
3784 *** `completion-annotate-function' is obsolete.
3786 *** New `metadata' method for completion tables. The metadata thus returned
3787 can specify various details of the data returned by `all-completions':
3788 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3789 used to select a style in completion-category-overrides.
3790 - `annotation-function' to add annotations in *Completions*.
3791 - `display-sort-function' to specify how to sort entries in *Completions*.
3792 - `cycle-sort-function' to specify how to sort entries when cycling.
3794 *** `minibuffer-local-filename-must-match-map' is not used any more.
3795 Instead, the bindings in `minibuffer-local-filename-completion-map'
3796 are combined with `minibuffer-local-must-match-map'.
3798 *** New variable `completing-read-function' allows overriding the
3799 behavior of `completing-read'.
3801 ** `glyphless-char-display' can now distinguish between graphical and
3802 text terminal display, via a char-table entry that is a cons cell.
3804 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3805 Instead, the offending function is removed.
3809 *** New function `run-hook-wrapped' for running an abnormal hook by
3810 passing the hook functions as arguments to a "wrapping" function.
3811 Like `run-hook-with-args-until-success', it stops at the first
3812 non-nil return value.
3814 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3815 set of "wrapping" filters, similar to around advice.
3816 (A version of this macro was actually added in Emacs 23.2 but was not
3817 advertised at the time.)
3821 *** New macro `condition-case-unless-debug' (this was actually added in
3822 Emacs 23.1 as condition-case-no-debug, but not advertised)
3824 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3826 *** Variable `stack-trace-on-error' removed.
3828 *** The debugger can now "continue" from an error, which means it will
3829 jump to the error handler as if the debugger had not been invoked
3830 instead of jumping all the way to the top-level.
3832 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3833 This can be useful when `inhibit-quit' is set.
3835 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3836 named Emacs server instances.
3838 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3839 to redirect STDOUT to a file.
3841 ** The function `format-time-string' now supports the %N directive,
3842 for higher-resolution time stamps.
3844 ** New input reading functions
3846 *** New function `read-char-choice' reads a restricted set of
3847 characters, discarding any inputs not inside the set.
3849 *** The command `read-color' now requires a match for a color name
3850 or RGB triplet, instead of signaling an error if the user provides
3853 **** `facemenu-read-color' is now an alias for `read-color'.
3855 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3856 The variable is now used to load all kind of supported dynamic libraries,
3857 not just image libraries. The previous name is still available as an
3860 ** Syntax parsing changes
3862 *** New variable `syntax-propertize-function'.
3863 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3864 This allows syntax-table properties to be set independently from font-lock:
3865 just call syntax-propertize to make sure the text is propertized.
3866 Together with this new variable come a new hook
3867 syntax-propertize-extend-region-functions, as well as two helper functions:
3868 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3869 as-is; and syntax-propertize-rules which provides a new way to specify
3872 *** Syntax tables support a new "comment style c" additionally to style b.
3874 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3876 ** frame-local variables cannot be let-bound any more.
3878 ** Major and minor mode changes
3880 *** `set-auto-mode' now respects mode: local variables at the end of files,
3881 as well as those in the -*- line.
3883 *** `prog-mode' is a new major mode from which programming modes
3886 **** `prog-mode-hook' can be used to enable features for programming
3887 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3888 on-the-fly spell checking for comments and strings.
3890 *** New hook `change-major-mode-after-body-hook', run by
3891 `run-mode-hooks' just before any other mode hooks.
3893 *** Enabled globalized minor modes can be disabled in specific major modes.
3894 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3895 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3897 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3899 ** File-handling changes
3901 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3902 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3903 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3904 argument is supplied (see Trash changes, above).
3906 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3908 ** Tool-bars can display separators.
3909 Tool-bar separators are handled like menu separators in menu-bar maps,
3910 i.e. via menu entries of the form `(menu-item "--")'.
3914 *** Animated images support (currently animated gifs only).
3916 **** `image-animated-p' returns non-nil if an image can be animated.
3918 **** `image-animate' animates a supplied image spec.
3920 **** `image-animate-timer' returns the timer object for an image that
3923 *** `image-extension-data' has been renamed to `image-metadata'.
3924 The old name is an obsolete alias to the new one.
3926 *** Image mode can view any image type that ImageMagick supports.
3927 This requires Emacs to be built with ImageMagick support.
3929 **** New function `imagemagick-types', defined if ImageMagick support
3930 is enabled, returns a list of image file extensions that your
3931 ImageMagick installation supports.
3933 **** New function `imagemagick-register-types' enables ImageMagick
3934 image types in Image mode and in `create-image' and other helper
3937 **** New option `imagemagick-types-inhibit' excludes certain
3938 ImageMagick image types from `imagemagick-register-types'.
3940 **** With ImageMagick support, there are extra Image mode commands to
3941 resize and rotate images: `image-transform-fit-to-height',
3942 `image-transform-fit-to-width', `image-transform-set-rotation', and
3943 `image-transform-set-scale'.
3945 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3946 passes it to the mail user agent function. This argument specifies an
3947 action for returning to the caller after finishing with the mail. For
3948 example, this is used by Rmail to optionally delete a mail window.
3950 ** XML and HTML parsing
3951 If Emacs is compiled with libxml2 support, there are two new
3952 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3953 and `libxml-parse-xml-region' (which parses XML). Both return an
3954 Emacs Lisp parse tree.
3956 ** Networking and encryption changes
3958 *** `open-network-stream' can now be used to open an encrypted stream.
3959 It now accepts an optional `:type' parameter for initiating a TLS
3960 connection, directly or via STARTTLS. To do STARTTLS, additional
3961 parameters (`:end-of-command', `:success', `:capabilities-command')
3962 must also be supplied.
3964 *** New library gnutls.el.
3965 The new function `gnutls-available-p' returns non-nil if Emacs is
3966 built with GnuTLS support. The main entry points are
3967 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3968 these functions through `open-network-stream', because that can
3969 upgrade connections through STARTTLS opportunistically or use plain
3970 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3973 *** New primitive `secure-hash' that supports many secure hash algorithms:
3974 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3975 sha1.el has been removed. The `sha1' feature is provided by default.
3979 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3981 ** Progress reporters can now "spin".
3982 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3983 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3984 time you call `progress-reporter-update' on that progress reporter,
3985 with a nil or omitted VALUE argument, the reporter message is
3986 displayed with a "spinning bar".
3988 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3989 being reverted, even if the buffer has a local `revert-buffer-function'.
3991 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3992 If delayed-warnings-list is non-nil, the command loop calls
3993 `delayed-warnings-hook' after `post-command-hook'. At present, this
3994 is only used by Emacs on some platforms to display warnings during
3995 startup, which might otherwise not be noticed. This uses the
3996 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3998 ** rx.el has a new `group-n' construct for explicitly numbered groups.
4000 ** New function `make-composed-keymap' that constructs a new keymap
4001 from multiple input maps. You can use this to make a keymap that
4002 inherits from multiple maps, eg:
4003 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4005 ** New function `string-prefix-p'.
4006 (This was actually added in Emacs 23.2 but was not advertised at the time.)
4008 ** New reader macro ## that stands for the empty symbol.
4009 This means that the empty symbol can now be read back. Also, #: by itself
4010 (when not immediately followed by a possible symbol character) stands for
4011 an empty uninterned symbol.
4013 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
4015 ** The following functions and variables are obsolete:
4017 *** `tooltip-use-echo-area' is obsolete.
4018 Rather than setting this to t, disable Tooltip mode instead.
4020 *** buffer-substring-filters is obsolete.
4021 Use `filter-buffer-substring-functions' instead.
4023 *** `byte-compile-disable-print-circle' is obsolete.
4025 *** `deferred-action-list' and `deferred-action-function' are obsolete.
4026 Use `post-command-hook' instead.
4028 *** `font-lock-maximum-size' is obsolete.
4031 * Changes in Emacs 24.1 on Non-Free Operating Systems
4033 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4034 and also when HOME is set to C:\ by default.
4036 ** New configure.bat options
4038 *** --enable-checking builds Emacs with extra runtime checks.
4040 *** --distfiles specifies files to be included in binary distribution.
4042 *** --without-gnutls disables automatic GnuTLS detection.
4044 *** --lib for general library linkage, works with the USER_LIBS build variable.
4046 ** New make target `dist' to create binary distribution for MS Windows.
4048 ** The Lisp function `w32-default-color-map' is now obsolete.
4049 (It is only used internally in the Emacs C code.)
4051 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4052 reappear on mouse-over. (Requires OS X 10.6 or later.)
4054 ** On Mac OS X, dragging a file into Emacs visits the file, like on
4055 other platforms, rather than inserting its contents into the buffer.
4058 ----------------------------------------------------------------------
4059 This file is part of GNU Emacs.
4061 GNU Emacs is free software: you can redistribute it and/or modify
4062 it under the terms of the GNU General Public License as published by
4063 the Free Software Foundation, either version 3 of the License, or
4064 (at your option) any later version.
4066 GNU Emacs is distributed in the hope that it will be useful,
4067 but WITHOUT ANY WARRANTY; without even the implied warranty of
4068 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4069 GNU General Public License for more details.
4071 You should have received a copy of the GNU General Public License
4072 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4078 paragraph-separate: "[
\f]*$"