1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
28 ** Emacs can now be compiled with ACL support.
29 This happens by default if a suitable support library is found at
30 build time, like libacl on GNU/Linux. To prevent this, use the
31 configure option `--disable-acl'. See below for related features.
34 ** Emacs can now be compiled with file notification support.
35 This happens by default if a suitable system library is found at
36 build time. To prevent this, use the configure option
37 `--without-file-notification'. See below for file-notify features.
38 This feature is not available for the Nextstep port.
41 ** Emacs can now be compiled with zlib support.
42 This happens by default if zlib is present, which it normally is.
43 To prevent this, use the configure option `--without-zlib'.
44 This provides the function `zlib-decompress-region'; see below for details.
47 ** The configure option `--without-compress-info' has been generalized,
48 and renamed to `--without-compress-install'. It now prevents compression
49 of _any_ files during installation.
52 ** The configure option `--with-crt-dir' has been removed.
53 It is no longer needed, as the crt*.o files are no longer linked specially.
56 ** Directories passed to configure option `--enable-locallisppath' are
57 no longer created during installation.
60 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
61 This requires pkg-config to be available at build time.
64 * Startup Changes in Emacs 24.4
67 ** When initializing `load-path', an empty element in the EMACSLOADPATH
68 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
69 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
70 load-path (the one that would have been used if EMACSLOADPATH was unset).
71 This makes it easier to _extend_ the load-path via EMACSLOADPATH
72 (previously, EMACSLOADPATH had to specify the complete load-path,
73 including the defaults). (In older versions of Emacs, an empty element
74 was replaced by ".", so use an explicit "." now if that is what you want.)
77 ** The -L option, which normally prepends its argument to load-path,
78 will instead append, if the argument begins with `:' (or `;' on MS Windows;
79 i.e., `path-separator').
82 ** If you use either site-load.el or site-init.el to customize the dumped
83 Emacs executable, any changes to `load-path' that these files make
84 will no longer be present after dumping. To affect a permanent change
85 to `load-path', use the `--enable-locallisppath' option of `configure'.
88 ** The user option `initial-buffer-choice' can now specify a function
89 to set up the initial buffer.
92 * Changes in Emacs 24.4
95 ** New function `zlib-decompress-region', which decompresses gzip- and
96 zlib-format compressed data using built-in zlib support, if available.
99 ** New option `gnutls-verify-error', if non-nil, means that Emacs
100 should reject SSL/TLS certificates that GnuTLS determines as invalid.
101 (This option defaults to nil at present, but this is expected to change
102 in a future release.)
105 ** Emacs now supports menus on text-mode terminals.
106 If the terminal supports a mouse, clicking on the menu bar, or on
107 sensitive portions of the mode line or header line, will drop down the
108 menu defined at that position. Likewise, clicking C-mouse-2 or
109 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
112 If the text terminal does not support a mouse, you can activate the
113 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
115 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
116 customize the option `tty-menu-open-use-tmm' to a non-nil value.
117 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
121 ** The *Messages* buffer is created in `messages-buffer-mode',
122 a new major mode, with read-only status. Any code that might create
123 the *Messages* buffer should call the function `messages-buffer' to do
124 so and set up the mode.
127 ** Emacs can now support ACLs (access control lists).
128 This requires a suitable support library to be found at build time.
129 On GNU/Linux, the POSIX ACL interface is used via libacl.
130 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
133 *** Emacs preserves the ACL entries of files when backing up.
135 *** New functions `file-acl' and `set-file-acl' get and set the ACL
138 ** Multi-monitor support has been added.
141 *** New functions `display-monitor-attributes-list' and
142 `frame-monitor-attributes' can be used to obtain information about
143 each physical monitor on multi-monitor setups.
146 *** The functions `display-pixel-width' and `display-pixel-height' now
147 behave consistently among the platforms: they return the pixel width
148 or height for all physical monitors associated with the given display
149 as if they were on X. To get information for each physical
150 monitor, use the new functions above. Similar notes also apply to
151 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
152 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
155 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
156 You can change the default by customizing `blink-cursor-blinks'.
159 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
160 This affects View mode, etc.
165 *** The command `apropos-variable' is renamed to `apropos-user-option'.
166 `apropos-user-option' shows all user options while `apropos-variable'
167 shows all variables. When called with a universal prefix argument,
168 the two commands swap their behaviors. When `apropos-do-all' is
169 non-nil, they output the same results.
172 *** The key `?' now describes prefix bindings, like `C-h'.
175 *** The command `describe-function' has been extended for EIEIO.
176 Running it on constructors will show a full description of the
177 generated class. For generic functions, it will show all
178 implementations together with links to the source. The old commands
179 `describe-class', `describe-constructor' and `describe-generic' were
183 *** The function `quail-help' is no longer an interactive command.
184 Use `C-h C-\' (`describe-input-method') instead.
189 *** ImageMagick images now support the :max-width and :max-height keywords.
192 *** When using `create-image' with image data, you can pass a :format
193 attribute (via the property-list argument) in order to help
194 ImageMagick detect the image type. The value should be a MIME
195 content-type that is found in the new variable `image-format-suffixes'.
197 ** Frame and window changes
200 *** The function `window-in-direction' introduced in Emacs 24.1 now
201 takes additional arguments for specifiying a reference point, wrapping
202 selection around frame borders, and specifying ways to select the
206 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
207 bound to <f11> and M-<f10>, respectively.
210 *** New hooks `focus-in-hook', `focus-out-hook'.
211 These are normal hooks run when an Emacs frame gains or loses input focus.
213 *** Emacs can now change frame sizes in units of pixels, rather than
214 text rows or columns. When maximizing a frame or making it fullscreen,
215 remaining extra pixels are no longer given to the minibuffer, the rightmost
216 fringe, or other unusable space, but are distributed among the text
217 areas of the frame's windows. If the new option `frame-resize-pixelwise'
218 is non-nil, all frame size changes happen pixelwise and set the
219 corresponding size hints for the window manager.
221 *** Emacs can now change window sizes in units of pixels.
222 Mouse-dragging a mode line or window divider now changes the size of
223 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
224 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
225 resize windows pixelwise. Most functions for changing or accessing
226 window sizes now have an additional argument that allows changes to apply,
227 or values to be returned, in pixels instead of lines/columns.
229 *** Emacs can now draw dividers between adjacent windows. To put
230 dividers between side-by-side/vertically stacked windows customize the
231 frame parameters `right-divider-width' and `bottom-divider-width' to
232 some positive integer. You can drag dividers with the mouse (they show
233 a corresponding cursor when the mouse hovers over them). You can change
234 the appearance of dividers by customizing the faces `window-divider',
235 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
236 two are useful to provide a 3D effect, or to better distinguish dividers
237 from surrounding display objects.
239 *** New functions are provided to return the pixel sizes of window
240 components, namely `window-scroll-bar-width', `window-mode-line-height'
241 `window-header-line-height', `window-right-divider-width' and
242 `window-bottom-divider-width'.
244 *** The new function `window-text-pixel-size' returns the size of the
245 text of a window's buffer in pixels. This allows functions like
246 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
247 window to its buffer as it will be displayed.
249 *** `fit-window-to-buffer' can now resize windows horizontally.
250 This behavior is controlled by the new option
251 `fit-window-to-buffer-horizontally'.
253 *** `fit-frame-to-buffer' can now fit frames in both directions.
254 This behavior is controlled by the option `fit-frame-to-buffer' which
255 tells in which direction(s) the frame shall be fit. The new options
256 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
257 control the size of the frame and its position on screen.
259 *** Temp Buffer Resize Mode can now adjust height and width of windows
260 and frames. `temp-buffer-resize-mode' is now able to adjust the height
261 and the width of a window displaying a temporary buffer. The new option
262 `temp-buffer-max-width' allows to control the width of temporary buffer
263 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
264 and the buffer appears in the root window of a frame, Temp Buffer Resize
265 Mode will try to adjust width and/or height of the frame.
268 *** `split-window' is now a non-interactive function, not a command.
269 As a command, it was a special case of `C-x 2' (`split-window-below'),
270 and as such superfluous. After being reimplemented in Lisp, its
271 interactive form was mistakenly retained.
274 *** The functions `window-size' and `window-total-size' now have an
275 optional argument to return a rounded size value.
278 *** `window-state-put' now allows to put a window state into internal
282 *** New option `scroll-bar-adjust-thumb-portion'.
283 Available only on X, this option allows to control over-scrolling
284 using the scroll bar (i.e. dragging the thumb down even when the end
285 of the buffer is visible).
288 *** New basic action function `display-buffer-in-previous-window' has
289 `display-buffer' display a buffer in a window previously showing that
293 *** New basic action function `display-buffer-at-bottom' has
294 `display-buffer' choose or make a window at the bottom of the selected
297 *** New display action function `display-buffer-no-window' to not
298 display the buffer in a window.
300 *** New display action alist entry `allow-no-window' to indicate the
301 caller of `display-buffer' is ready to handle the case of not
302 displaying the buffer in a window.
304 ** Lisp evaluation changes
306 *** `eval-defun' on an already defined defcustom calls the :set function,
310 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
311 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
312 zero prefix argument. This disables truncation of lists in the output,
313 equivalent to setting `(eval-expression-)print-length' and
314 `(eval-expression-)print-level' to nil. Additionally, it causes integers
315 to be printed in other formats (octal, hexadecimal, and character).
318 *** New hook `eval-expression-minibuffer-setup-hook' run by
319 `eval-expression' on entering the minibuffer.
322 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
325 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
326 because it affects caching of paragraph scanning results as well.
327 There is no reason to set this to nil except for debugging purposes.
330 ** The option `set-mark-default-inactive' has been deleted.
331 This unfinished feature was introduced by accident in Emacs 23.1;
332 simply disabling Transient Mark mode does the same thing.
335 ** The default value of `comment-use-global-state' is now t,
336 and this variable has been marked obsolete.
339 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
340 and works for git too, if you fetch the repository notes.
343 ** New option `load-prefer-newer' affects how the `load' function chooses
344 the file to load. If this is non-nil, then when both .el and .elc
345 versions of a file exist, and the caller did not explicitly specify
346 which one to load, then the newer file is loaded. The default, nil,
347 means to always load the .elc file.
350 * Editing Changes in Emacs 24.4
352 ** Indentation changes
355 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
356 When invoked without a prefix argument, it now activates a transient
357 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
358 the text indentation in the region. Typing any other key resumes
359 normal editing behavior.
361 *** `electric-indent-mode' is enabled by default.
364 *** `tab-stop-list' is now implicitly extended to infinity by repeating
365 the last step. Its default value is changed to nil, which means a tab
366 stop every `tab-width' columns.
369 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
370 When called in succession, it cycles between spacing conventions:
371 one space, no spaces, original spacing.
374 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
375 a line after a one-letter word, which is an error in some typographical
376 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
379 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
382 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
383 Most commands are still unaware of it, but kill/yank do work on the rectangle.
386 ** New option `visual-order-cursor-movement'.
387 If this is non-nil, cursor motion with arrow keys will follow the
388 visual order of characters on the screen: <left> always moves to the
389 left, <right> always moves to the right, disregarding the surrounding
390 bidirectional context.
395 *** All interactive commands that read a register (`copy-to-register', etc.)
396 now display a temporary window after `register-preview-delay' seconds
397 that summarizes existing registers. To disable this, set that option to nil.
398 Interactive commands that read registers and want to make use of this
399 should use `register-read-with-preview' to read register names.
402 *** New command `frameset-to-register' bound to `C-x r f', replacing
403 `frame-configuration-to-register'. It offers similar functionality,
404 plus enhancements like the ability to restore deleted frames.
405 (`frame-configuration-to-register' still exists, but no longer has a
409 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
413 ** New command `delete-duplicate-lines'.
414 This searches the region for identical lines, and removes all but one
415 copy of each repeated line. The lines need not be sorted.
418 * Changes in Specialized Modes and Packages in Emacs 24.4
421 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
423 ~/.emacs.d/timelog replaces ~/.timelog
424 ~/.emacs.d/vip replaces ~/.vip
425 ~/.emacs.d/viper replaces ~/.viper
426 ~/.emacs.d/ido.last replaces ~/.ido.last
427 ~/.emacs.d/kkcrc replaces ~/.kkcrc
428 ~/.emacs.d/quickurls replaces ~/.quickurls
429 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
430 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
431 ~/.emacs.d/places replaces ~/.emacs-places
432 ~/.emacs.d/shadows replaces ~/.shadows
433 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
434 ~/.emacs.d/strokes replaces ~/.strokes
435 ~/.emacs.d/notes replaces ~/.notes
436 ~/.emacs.d/type-break replaces ~/.type-break
437 Also the following files used by the now obsolete otodo-mode.el:
438 ~/.emacs.d/todo-do replaces ~/.todo-do
439 ~/.emacs.d/todo-done replaces ~/.todo-done
440 ~/.emacs.d/todo-top replaces ~/.todo-top
442 ** Backtrace and debugger
445 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
446 display of local variables of the current stack frame.
449 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
450 the lexical environment when evaluating the code in the context at point
451 (and so allows you to access lexical variables).
454 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
457 ** Battery information can now be retrieved from BSD's `apm' utility.
460 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
462 ** Calendar and Diary
465 *** New faces `calendar-weekday-header', `calendar-weekend-header',
466 and `calendar-month-header'.
469 *** New option `calendar-day-header-array'.
472 *** New variable `diary-from-outlook-function', used by the command
473 `diary-from-outlook'.
476 *** The variable `calendar-font-lock-keywords' is obsolete.
481 *** Calc by default now uses the Gregorian calendar for all dates, and
482 uses January 1, 1 AD as its day number 1. Previously Calc used the
483 Julian calendar for dates before September 14, 1752, and it used
484 December 31, 1 BC as its day number 1; the new scheme is more
485 consistent with Calendar's calendrical system and day numbering.
488 *** The new option `calc-gregorian-switch' lets you configure if
489 (and when) Calc switches from the Julian to the Gregorian calendar.
492 *** Support for ISO 8601 dates.
498 **** The cpp-root project now supports executing a compile command.
499 It can be set through the new :compile-command slot or the
500 buffer-local variable `compile-command'.
502 **** Better selection of include directories for the 'linux' project.
503 Include directories now support out-of-tree build directories and
504 target architecture auto-detection.
508 **** Improved detection of used namespaces in current scope in C++.
510 **** Parsing of default values for variables and function arguments in C/C++.
511 They are also displayed by the summarize feature in the mode line.
513 **** Improved parsing of function pointers in C/C++.
514 This also includes parsing of function pointers as function arguments.
516 **** Parsing of C/C++ preprocessor macros that open new scope.
517 For example, this enables parsing of macros that open new namespaces.
519 **** Support for 'this' pointer in inline member functions in C++.
524 *** New macro `cl-tagbody'.
525 This executes statements while allowing for control transfer to labels.
528 *** letf is now just an alias for cl-letf.
533 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
534 Hence, you can now enable it independently from those modes, and from
535 `transient-mark-mode'.
538 *** `cua-highlight-region-shift-only' is now obsolete.
539 You can disable `transient-mark-mode' to get the same result.
542 *** CUA's rectangles can now be used without CUA by calling the command
543 `cua-rectangle-mark-mode'.
548 *** Support for completion, ElDoc, and Flycheck has been added.
551 *** The current CFEngine syntax is parsed from "cf-promises -s json".
552 There is a fallback syntax available if you don't have cf-promises or
553 if your version doesn't support that option. See option `cfengine-cf-promises'.
556 ** Delete Selection mode can now be used without Transient Mark mode.
561 *** `desktop-save-mode' by default now auto-saves an existing desktop file
562 after `desktop-auto-save-timeout'. To disable this, customize that option
566 *** `desktop-restore-frames', enabled by default, allows saving and
567 restoring the frame/window configuration (frameset). Additional options
568 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
569 and `desktop-restore-forces-onscreen' offer further customization.
572 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
573 such as file ownership or permissions, are visible.
576 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
577 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
578 The results display in the mode line.
580 ** Electric Pair mode
583 *** New option `electric-pair-preserve-balance', enabled by default.
584 If non-nil, pairing/skipping only kicks in when that help the balance
585 of parentheses and quotes, i.e. the buffer should end up at least as
588 You can further control this behavior by adjusting the predicates
589 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
592 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
593 In `electric-pair-mode', the commands `backward-delete-char' and
594 `backward-delete-char-untabify' are now bound to electric variants
595 that delete the closer when invoked between adjacent pairs.
598 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
599 In `electric-pair-mode', inserting a newline between adjacent pairs
600 opens an extra newline after point, which is indented if
601 `electric-indent-mode' is also set.
604 *** New option `electric-pair-skip-whitespace', enabled by default.
605 This controls if skipping over closing delimiters should jump over any
606 whitespace slack. Setting it to `chomp' makes it delete this
607 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
610 *** New variables control the pairing in strings and comments.
611 You can customize `electric-pair-text-pairs' and
612 `electric-pair-text-syntax-table' to tweak pairing behavior inside
613 strings and comments.
616 ** New EPA option `epa-mail-aliases'.
617 You can set this to a list of email address aliases that `epa-mail-encrypt'
618 should use to find keys.
621 ** New ERC option `erc-accidental-paste-threshold-seconds'.
622 If set to a number, this can be used to avoid accidentally pasting large
623 amounts of data into the ERC input.
626 ** New ERT macro `skip-unless' allows skipping ERT tests.
627 See the ERT manual for details.
632 *** `eshell' now supports visual subcommands and options.
633 Eshell has been able to handle "visual" commands (interactive,
634 non-line oriented commands such as top that require display
635 capabilities not provided by eshell) by running them in an Emacs
636 terminal emulator. See `eshell-visual-commands'.
638 This feature has been extended to subcommands and options that make a
639 usually line-oriented command a visual command. Typical examples are
640 "git log" and "git <command> --help", which display their output in a
641 pager by default. See `eshell-visual-subcommands' and
642 `eshell-visual-options'.
645 *** New Eshell-Tramp module.
646 External su and sudo commands are now the default; the internal,
647 Tramp-using variants can still be used by enabling the eshell-tramp
651 ** New F90 mode option `f90-smart-end-names'.
654 Icomplete is now more similar to Ido.
657 *** Icomplete by default now applies to all forms of minibuffer completion.
658 The variable `icomplete-with-completion-tables' (now a user option)
659 controls this. To restore the old behavior, set it back to
660 '(internal-complete-buffer).
663 *** You can navigate through and select completions using the keys
664 from `icomplete-minibuffer-map'.
667 *** The string that separates potential completions is now a customizable
668 option (`icomplete-separator'). The default is " | " rather than ",".
671 *** New face `icomplete-first-match'; and new options
672 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
675 *** The option `icomplete-show-key-bindings' has been removed.
680 *** An Ido user manual is now included.
683 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
684 This means to use virtual buffers if the current ido input does not match
688 *** The variable `ido-decorations' can optionally have two new elements,
689 which are the brackets to use around the sole remaining completion.
694 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
695 visit the next image file and the previous image file in the same
696 directory, respectively.
699 *** New commands to show specific frames of multi-frame images.
700 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
701 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
704 *** New commands to speed up, slow down, or reverse animation.
705 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
706 speed up and slow down the animation. `a r' (`image-reverse-speed')
707 to reverse it and `a 0' (`image-reset-speed') to reset it.
710 *** The command `image-mode-fit-frame' deletes other windows.
711 When toggling, it restores the frame's previous window configuration.
712 It also has an optional frame argument, which can be used by Lisp
713 callers to fit the image to a frame other than the selected frame.
718 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
719 the symbol found near point.
722 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
723 will cycle through faces in `hi-lock-face-defaults' without prompting.
726 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
731 *** New Info face `info-index-match', used to highlight matches in index
732 entries displayed by `Info-index-next', `Info-virtual-index' and
736 *** The Info-edit command is obsolete. Editing Info nodes by hand
737 has not been relevant for some time.
742 *** New option `js-switch-indent-offset'.
745 *** Better indentation of multiple-variable declarations.
746 If a declaration spans several lines, variables on the following lines
747 are lined up to the first one.
750 *** Recognition and better indentation of continuations in array comprehensions.
753 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
758 *** Font locking for Texinfo comments and new keywords.
760 *** Completion in Octave file buffers.
764 *** Jump to definition.
766 *** Documentation lookup/search.
769 ** OPascal mode is the new name for Delphi mode
772 *** All delphi-* variables and functions have been renamed to opascal-*.
773 Obsolete aliases exist for those likely to have been used externally.
776 *** The option `delphi-newline-always-indents' has been removed.
777 Use `electric-indent-mode' instead.
780 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
785 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
786 to filter the list of packages by a keyword.
789 *** In the `describe-package' buffer, there are now buttons listing the
790 keywords related to the package. Click on a button to see other packages
791 related to that keyword.
794 *** The format of `archive-contents' files, generated by package
795 repositories, has changed to allow a new (fifth) element in the data
796 vectors, containing an associative list with extra properties.
797 (For example, `describe-package' uses the `:url' extra property to
798 display a "Homepage" header.)
801 ** In Prolog mode, `prolog-use-smie' has been removed,
802 along with the non-SMIE indentation code.
807 *** The new command `remember-notes' creates a buffer that is saved on exit.
808 You can use it as a more permanent *scratch* buffer.
811 *** Remember can now store notes in separate files.
812 To use this, add `remember-store-in-files' to the `remember-handler-functions'
813 option. The files are saved in `remember-data-directory' using
814 names specified by `remember-directory-file-name-format'.
819 *** Customize `rmail-mbox-format' to influence some minor aspects of
820 how Rmail displays non-MIME messages.
823 *** The `unrmail' command now converts from BABYL to mboxrd format,
824 rather than mboxo. Customize `unrmail-mbox-format' to change this.
829 *** Improved syntax highlighting and indentation.
832 *** New `electric-indent-mode' integration.
835 *** New option `ruby-encoding-magic-comment-style'.
838 *** New option `ruby-custom-encoding-magic-comment-template'.
841 *** New option `ruby-align-to-stmt-keywords'.
844 *** New option `ruby-align-chained-calls'.
847 *** More Ruby file types have been added to `auto-mode-alist'.
849 ** Search and Replace
852 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
853 starts a symbol (identifier) incremental search forward with the
854 symbol found near point added to the search string initially.
857 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
858 and adds it to the search string.
861 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
864 *** `query-replace' skips invisible text when `search-invisible' is nil,
865 and opens overlays with hidden text when `search-invisible' is `open'.
868 *** A negative prefix arg of replacement commands replaces backward.
869 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
870 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
873 *** By default, prefix arguments do not now terminate Isearch mode.
874 Set `isearch-allow-prefix' to nil to restore old behavior.
877 *** More Isearch commands accept prefix arguments, namely
878 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
882 *** Word search now matches whitespace at the beginning/end
883 of the search string if it contains leading/trailing whitespace.
884 In an incremental word search or when using a non-nil LAX argument
885 of `word-search-regexp', the lax matching can also match part of
886 the first word (in addition to the lax matching of the last word).
887 The same rules are now applied to the symbol search with the difference
888 that it matches symbols, and non-symbol characters between symbols.
891 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
894 ** The shell.el option `explicit-bash-args' includes --noediting by default.
895 All non-ancient Bash versions support this option.
900 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
903 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
907 *** You can customize the indentation of modes that use SMIE via `smie-config'.
908 The command `smie-config-guess' can help you derive the appropriate
909 indentation settings, if you provide it with an indented sample file.
910 Use `smie-config-save' to save the result.
912 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
917 *** Improved login monitoring and appropriate response to login failures.
918 New variable `sql-login-delay' defines maximum wait time for a connection.
921 SQL*Plus script placeholders are properly highlighted and identified
922 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
923 are passed before the logon parameter, as required. The default now
924 includes `-L', to limit the number of logon attempts per invocation.
927 ** New Term mode option `term-suppress-hard-newline'.
930 ** Todo mode has been rewritten and enhanced.
931 The Todo mode user manual describes all commands and most user
932 options. To support some of these features, a new file format is
933 used, which is incompatible with the old format; however, you can
934 convert old todo and done item files to the new format on initializing
935 the first new todo file, or at any later time with the provided
936 conversion command. The previous version of todo-mode.el has been
937 renamed to otodo-mode.el and is now obsolete. New features include:
939 *** Support for multiple todo files and archive files of done items.
941 *** Renaming, reordering, moving, merging, and deleting categories.
943 *** Sortable tabular summaries of categories and the item types they contain.
945 *** Cross-category lists of items filtered by specific criteria.
947 *** More fine-grained interaction with the Emacs diary, by being able to
948 decide for each todo item whether it appears in the Fancy Diary display.
950 *** Highly flexible new item insertion and item editing.
952 *** Moving items between categories, storing done items in their category
953 or in archive files, undoing or unarchiving done items.
955 *** Reprioritizing items by inputting a numerical priority.
957 *** Extensive customizability of operation and display, including many faces.
962 *** `trace-function' and `trace-function-background' no longer prompt for
963 the output buffer. Unless you use a prefix argument, they output to
967 *** With a prefix argument, `trace-function' and `trace-function-background'
968 will prompt for a "context". This is a Lisp expression, whose value at the
969 time the function is entered/exited is printed along with the function's
975 *** The experimental url syntax for remote file names has been removed.
978 *** New connection method "adb", which allows to access Android
979 devices by the Android Debug Bridge. The variable `tramp-adb-program'
980 can be used to adapt the path of the "adb" program, if needed.
983 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
984 "scpc" and "rsyncc" are discontinued. The ssh option
985 "ControlMaster=auto" is set automatically in all ssh-based methods,
986 when possible. See `tramp-use-ssh-controlmaster-options'.
989 *** Handlers for `file-acl' and `set-file-acl' for remote machines
990 which support POSIX ACLs.
993 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
994 for remote machines which support filesystem notifications.
997 ** New URL command `url-cookie-list' displays the current cookies,
998 and allows you to interactively remove cookies.
1000 ** VC and related modes
1003 *** In VC directory mode, `D' displays diffs between VC-controlled
1004 whole tree revisions.
1007 *** In VC directory mode, `L' lists the change log for the current VC
1008 controlled tree in a window.
1011 *** In VC directory mode, `I' shows a log of changes that will be
1012 received with a pull operation.
1015 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1016 under current version control system. When called with a prefix
1017 argument, you can remove a file from the ignored file list.
1022 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1025 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1028 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1029 are obsolete. Customize the `woman-*' faces instead.
1031 ** Obsolete packages
1034 *** iswitchb.el; use icomplete-mode.
1037 *** longlines.el; use visual-line-mode.
1046 *** terminal.el; use term.el instead.
1049 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1052 *** xesam.el (owing to the cancellation of the XESAM project).
1055 *** yow.el; use fortune.el or cookie1.el instead.
1058 * New Modes and Packages in Emacs 24.4
1061 ** New package `eww' is a built-in web browser.
1062 It is only available if Emacs is compiled with libxml2 support.
1065 ** New minor mode `superword-mode'.
1066 This overrides the default word motion commands to treat "symbol_words"
1067 as a single word, similar to what `subword-mode' does.
1070 ** New package nadvice.el offers lighter-weight advice facilities.
1073 *** add-function/remove-function, which can be used to add/remove code on any
1074 function-carrying place, such as process-filters or `<foo>-function' hooks.
1076 *** advice-add/advice-remove to add/remove a piece of advice on a named
1077 function, much like `defadvice' does.
1079 ** New package frameset.el.
1080 It provides a set of operations to save a frameset (the state of all
1081 or a subset of the existing frames and windows, somewhat similar to a
1082 frame configuration), both in-session and persistently, and restore it
1083 at some point in the future.
1086 ** New package filenotify.el provides an interface for file system
1087 notifications. It requires that Emacs be compiled with one of the
1088 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1091 * Incompatible Lisp Changes in Emacs 24.4
1094 ** `kill-region' has lost its `yank-handler' optional argument.
1097 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1098 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1101 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1104 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1105 Some languages match those as »...«, and others as «...», so it is
1106 better for Emacs to stay neutral by default.
1109 ** In compiled Lisp files, the header no longer includes a timestamp.
1112 ** The default file coding for Emacs Lisp files is now utf-8.
1113 (See `file-coding-system-alist'.) In most cases, this change is
1114 transparent, but files that contain unusual characters without
1115 specifying an explicit coding system may fail to load with obscure
1116 errors. You should either convert them to utf-8 or add an explicit
1120 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1121 It used to disable the minor mode, major mode, and text-property keymaps,
1122 whereas now it simply has higher precedence.
1125 ** Default process filters and sentinels are not nil any more.
1126 Instead they default to a function that does what the nil value used to do.
1129 ** `read-event' does not return decoded chars in ttys any more.
1130 As was the case in Emacs 22 and before, the decoding of terminal
1131 input, according to `keyboard-coding-system', is not performed in
1132 `read-event' any more. But unlike in Emacs 22, this decoding is still
1133 done before input-decode-map, function-key-map, etc.
1136 ** The option `inhibit-local-menu-bar-menus' has been removed.
1139 ** Frame-local variables that affect redisplay do not work any more.
1140 More specifically, redisplay does not bother to check for a frame-local
1141 value when looking up variables.
1144 ** nil and "unbound" are indistinguishable in `symbol-function'.
1145 `symbol-function' does not signal a `void-function' error any more.
1146 To determine if a symbol's function definition is void, use `fboundp'.
1149 ** `defadvice' does not honor the `freeze' flag and cannot advise
1150 special-forms any more.
1153 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1154 when lexical binding is enabled. Previously, VAR was bound to nil,
1155 which often led to spurious unused-variable warnings.
1158 ** The return value of `backup-buffer' has changed.
1159 The second argument is no longer an SELinux context, instead it is an
1160 alist of extended attributes as returned by the new function
1161 `file-extended-attributes'. The attributes can be applied to another
1162 file using `set-file-extended-attributes'.
1165 ** By default `copy-file' no longer copies file permission bits to an
1166 existing destination; and it sets the file permission bits of a newly
1167 created destination to those of the source, masked by the default file
1168 permissions. To copy the file permission bits, pass t as the
1169 PRESERVE-PERMISSIONS argument of `copy-file'.
1172 ** `visited-file-modtime' now returns -1 for nonexistent files.
1173 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1174 in the presence of files with negative time stamps.
1177 ** The cars of the elements in `interpreter-mode-alist' are now
1178 treated as regexps rather than literal strings.
1181 * Lisp Changes in Emacs 24.4
1184 ** The second argument of `eval' can now specify a lexical environment.
1187 ** New functions `special-form-p' and `macrop'.
1190 ** New macro `define-alternatives' can be used to define generic commands.
1191 Generic commands are interactive functions whose implementation can be
1192 selected among several alternatives, as a matter of user preference.
1195 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1196 on that symbol will use the associated value as a function to call
1200 ** New variable `enable-dir-local-variables'.
1201 Directory-local variables are ignored if this is nil. This may be
1202 useful for modes that want to ignore directory-locals while still
1203 respecting file-local variables.
1206 ** New function `get-pos-property'.
1209 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1210 as a function to call to provide default values.
1212 ** Completion changes
1215 *** The separator used by `completing-read-multiple' is now a regexp.
1216 The default `crm-separator' has been changed to allow surrounding spaces
1220 *** The `common-substring' argument of `display-completion-list',
1221 which has been documented as obsolete since Emacs 23.1, is now _really_
1222 obsolete, and no longer advertised. Instead either call
1223 `completion-hilit-commonality' to add the highlighting; or use
1224 `completion-all-completions', which returns highlighted strings.
1227 *** New function `completion-table-with-cache' is a wrapper for
1228 `completion-table-dynamic' that caches the result of the last lookup.
1231 *** New function `completion-table-merge' to combine several
1232 completion tables by merging their completions.
1235 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1236 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1237 this replaces the string "lambda" with the Greek lambda character.
1242 *** Functions to pop up menus and dialogs now work on all terminals,
1243 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1244 `message-box', `yes-or-no-p', etc.
1246 The function `display-popup-menus-p' will now return non-nil for a
1247 display or frame whenever a mouse is supported on that display or
1251 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1254 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1255 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1258 ** New hook `pre-redisplay-function'.
1261 ** New bool-vector set operation functions
1262 *** `bool-vector-exclusive-or'
1263 *** `bool-vector-union'
1264 *** `bool-vector-intersection'
1265 *** `bool-vector-set-difference'
1266 *** `bool-vector-not'
1267 *** `bool-vector-subsetp'
1268 *** `bool-vector-count-consecutive'
1269 *** `bool-vector-count-population'
1272 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1274 ** Error-handling changes
1277 *** New function `define-error'.
1280 *** `with-demoted-errors' takes an additional argument `format'.
1283 ** New macro `with-eval-after-load'.
1284 This is like the old `eval-after-load', but better behaved.
1287 ** New library subr-x.el with miscellaneous small utility functions
1288 *** `hash-table-keys'
1289 *** `hash-table-values'
1290 *** `string-blank-p'
1291 *** `string-empty-p'
1293 *** `string-reverse'
1294 *** `string-trim-left'
1295 *** `string-trim-right'
1297 *** `string-remove-prefix'
1298 *** `string-remove-suffix'
1301 ** Obsoleted functions
1304 *** `lisp-complete-symbol'
1305 *** `field-complete'
1306 *** `minibuffer-completion-contents'
1307 *** `isearch-nonincremental-exit-minibuffer'
1308 *** `isearch-filter-visible'
1309 *** `generic-make-keywords-list'
1310 *** `get-upcase-table' (use `case-table-get-table' instead).
1313 ** `with-wrapper-hook' is obsoleted by `add-function'.
1314 The few hooks that used with-wrapper-hook are replaced as follows:
1315 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1316 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1317 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1320 ** `byte-compile-interactive-only-functions' is now obsolete.
1321 To specify that a command should only be called interactively, give it
1322 a non-nil `interactive-only' property.
1325 ** `split-string' now takes an optional argument TRIM.
1326 The value, if non-nil, is a regexp that specifies what to trim from
1327 the start and end of each substring.
1330 ** New function `string-suffix-p'.
1332 ** File-handling changes
1335 *** Support for filesystem notifications.
1336 Emacs now supports notifications of filesystem changes, such as
1337 creation, modification, and deletion of files. This requires the
1338 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1339 MS-Windows systems, this is supported for Windows XP and newer
1343 *** The 9th element returned by `file-attributes' is now unspecified.
1344 Formerly, it was t if the file's gid would change if file were deleted
1345 and recreated. This value has been inaccurate for years on many
1346 platforms, and nobody seems to have noticed or cared.
1349 *** The 6th argument to `copy-file' has been renamed to
1350 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1351 Unix file permission bits as well as SELinux context.
1354 *** The function `file-ownership-preserved-p' now has an optional
1355 argument GROUP which causes it check for file group too. This can be
1356 used in place of the 9th element of `file-attributes'.
1359 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1360 argument, with the same interpretation as the returned value of
1361 `visited-file-modtime'.
1363 ** Autorevert changes
1366 *** If Emacs is compiled with file notification support, notifications
1367 are used instead of checking the time stamp of the files. You can
1368 disable this by setting the user option `auto-revert-use-notify' to
1369 nil. Alternatively, a regular expression of directories to be
1370 excluded from file notifications can be specified by
1371 `auto-revert-notify-exclude-dir-regexp'.
1374 *** The new user option `auto-revert-remote-files' enables reversion
1375 of remote files when set to non-nil.
1380 *** The function `face-spec-set' is now like `setq' for face specs.
1381 Its third arg now accepts values specifying a face spec type (defface,
1382 custom, or override spec), and the relevant spec is set accordingly.
1385 *** New function `add-face-text-property', which can be used to
1386 conveniently prepend/append new face properties.
1389 *** Face specs set via Custom themes now replace the `defface' spec
1390 rather than inheriting from it. In other words, setting a face via a
1391 theme now behaves like setting it via Customize: you only need to
1392 specify the attributes that you want, you don't need to unset those
1393 that you don't want.
1396 *** New face characteristic (supports :underline (:style wave))
1397 specifies whether or not the terminal can display a wavy line.
1400 *** New face spec attribute :distant-foreground
1401 specifies foreground to use if background color is near the foreground
1402 color that would otherwise have been used.
1407 *** `image-animated-p' is now `image-multi-frame-p'.
1408 It returns non-nil for any image that contains multiple frames,
1409 whether or not it specifies a frame delay.
1412 *** New variable `image-default-frame-delay' gives the frame delay for
1413 animated images which do not specify a frame delay.
1416 *** New functions `image-current-frame' and `image-show-frame' for getting
1417 and setting the current frame of a multi-frame image.
1422 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1423 **** object-name -> eieio-object-name
1424 **** object-class -> eieio-object-class
1425 **** object-class-fast -> eieio--object-class
1426 **** object-class-name -> eieio-object-class-name
1427 **** object-name-string -> eieio-object-name-string
1428 **** object-num-slots -> eieio--object-num-slots
1429 **** object-set-name-string -> eieio-object-set-name-string
1430 **** class-of -> eieio-object-class
1431 **** class-name -> eieio-class-name
1432 **** class-parent -> eieio-class-parent
1433 **** class-parents -> eieio-class-parents
1434 **** class-parents-fast -> eieio-class-parents-fast
1435 **** class-children -> eieio-class-children
1436 **** class-num-slots -> eieio--class-num-slots
1437 **** class-precedence-list -> eieio-class-precedence-list
1438 **** class-direct-subclasses -> eieio-class-children
1439 **** class-direct-superclasses -> eieio-class-parents
1441 ** Changes in encoding and decoding of text
1444 *** New coding-system `prefer-utf-8'.
1445 This is like `undecided' but prefers UTF-8 on decoding if the text to
1446 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1447 any non-ASCII characters are automatically encoded as UTF-8.
1450 *** New attributes of coding-systems whose type is `undecided'.
1451 Two new attributes, `:inhibit-null-byte-detection' and
1452 `:inhibit-iso-escape-detection', determine how to detect encoding of
1453 text that includes null bytes and ISO-2022 escape sequences,
1454 respectively. Each of these attributes can be either nil, zero, or
1455 t. If it is t, decoding text ignores null bytes and, respectively,
1456 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1457 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1458 text is encoded in one of the ISO-2022 encodings, such as
1459 iso-2022-7bit. If the value is zero, Emacs consults the variables
1460 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1462 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1463 UTF-8 encoding and decoding, whenever possible.
1465 These attributes are only meaningful for coding-systems of type
1466 `undecided'. (The type of a coding-system is determined by its
1467 `:coding-type' attribute and can be accessed by calling the
1468 `coding-system-type' function.)
1471 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1474 ** New functions `group-gid' and `group-real-gid'.
1477 ** The spelling of the rx.el category `chinese-two-byte' has been
1478 corrected (the first 'e' was missing).
1481 ** Minor internal changes to the details of lock files.
1482 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1483 If DIR/.#FILE already exists and is not an Emacs lock file,
1484 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1485 numbered lock files DIR/.#FILE.0...).
1486 On file systems that do not support symbolic links, the lock is now a
1487 regular file with contents being what would have been in the symlink.
1489 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1492 *** The package descriptor and name of global variables, constants,
1493 and functions should be separated by two hyphens if the symbol is not
1494 meant to be used by other packages.
1497 * Changes in Emacs 24.4 on Non-Free Operating Systems
1500 ** The procedure for building Emacs on MS-Windows has changed.
1501 It is now built by running the same configure script as on all other
1502 platforms. This requires the MSYS environment and MinGW development
1503 tools. See the updated instructions in nt/INSTALL for details.
1505 Using the Posix configure script and Makefile's also means a change in
1506 the directory structure of the Emacs installation on Windows. It is
1507 now the same as on GNU and Unix systems. In particular, the auxiliary
1508 programs, such as cmdproxy.exe and hexl.exe, are in
1509 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1510 version), version-independent site-lisp is in share/emacs/site-lisp,
1511 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1512 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1513 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1514 directories and will find the files in there automatically; there's no
1515 need to set any variables due to this change.)
1518 ** Emacs on Windows 2000 and later can now access files and directories
1519 whose names cannot be encoded in the current system codepage.
1521 The new variable `w32-unicode-filenames' controls this feature: if it
1522 is t, Emacs uses Unicode APIs to pass file names to system calls,
1523 which lifts the limitation of file names to the current locale.
1526 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1527 The backtrace is written to the 'emacs_backtrace.txt' file in the
1528 directory where Emacs was running.
1531 ** The variable `buffer-file-type' is no longer supported.
1532 Setting it has no effect, and %t in the mode-line format is ignored.
1533 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1534 modifying it has no effect.
1537 ** Lock files now work on MS-Windows.
1538 This helps to prevent losing your edits if the same file is being
1539 edited in another Emacs session or by another user. See the node
1540 "Interlocking" in the Emacs User Manual for the details. To disable
1541 file locking, customize `create-lockfiles' to nil.
1543 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1544 GNUstep and Mac OS X 10.4 use the old font backend.
1545 To use the old backend by default, do on the command line:
1546 % defaults write org.gnu.Emacs FontBackend ns
1548 ** Improved fullscreen support on Mac OS X.
1549 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1550 Customize `ns-use-native-fullscreen' to change the style.
1551 For Mac OS X 10.7 and newer, native is the default.
1553 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1554 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1555 does not apply to images.
1558 * Installation Changes in Emacs 24.3
1560 ** The default X toolkit is now Gtk+ version 3.
1561 If you don't pass `--with-x-toolkit' to configure, or if you use
1562 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1563 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1564 You can explicitly require a specific version by passing
1565 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1567 ** New configure option `--enable-link-time-optimization', to utilize
1568 an appropriate feature provided by GCC since version 4.5.0.
1570 ** New configure option `--without-all' to disable most of the optional
1571 features (image support, etc.) that are normally enabled by default.
1573 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1574 Emacs). If building with GCC, this enables compile-time checks that
1575 warn/give errors about possibly-questionable C code. On a recent GNU
1576 system there should be no warnings; on older and on non-GNU systems
1577 the results may be useful to developers.
1579 ** The configure option `--enable-use-lisp-union-type' has been
1580 renamed to `--enable-check-lisp-object-type', as the resulting
1581 Lisp_Object type no longer uses a union to implement the compile time
1582 check that this option enables.
1584 ** The configure option `--disable-maintainer-mode' has been removed,
1585 as it was confusingly-named and rarely useful.
1587 ** The configure options `--program-prefix', `--program-suffix', and
1588 `--program-transform-name' apply to more than just the installed
1589 binaries. Now they also affect the man pages, icons, and the
1590 etc/emacs.desktop file; but not the info pages, since this would break
1591 links between the various manuals.
1593 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1594 overwriting "emacs" in the installation bin/ directory with a link
1597 ** Emacs uses libtinfo in preference to libncurses, if available.
1599 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1600 /usr/pkg/lib to the linker search path. You must add them yourself if
1603 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1604 (from the bin and libexec directories, respectively). The former is
1605 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1608 * Startup Changes in Emacs 24.3
1610 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1611 lisp/ directory. There should not be any there anyway. If you have
1612 been adding them there, put them somewhere else; e.g., site-lisp.
1614 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1617 * Changes in Emacs 24.3
1621 *** `C-h f' (`describe-function') can now perform autoloading.
1622 When this command is called for an autoloaded function whose docstring
1623 contains a key substitution construct, that function's library is
1624 automatically loaded, so that the documentation can be shown
1625 correctly. To disable this, set `help-enable-auto-load' to nil.
1627 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1628 even after their associated libraries have been loaded (and the
1629 autoloads have been redefined as functions).
1633 *** Images displayed via ImageMagick now support transparency and the
1634 :background image specification property.
1636 *** When available, ImageMagick support is automatically enabled.
1637 It is no longer necessary to call `imagemagick-register-types'
1638 explicitly to install ImageMagick image types; that function is called
1639 automatically at startup, or when customizing an imagemagick- option.
1641 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1642 ImageMagick to view images. (You must call `imagemagick-register-types'
1643 afterwards if you do not use customize to change this.)
1645 *** The new variable `imagemagick-enabled-types' also affects which
1646 ImageMagick types are treated as images. The function
1647 `imagemagick-filter-types' returns the list of types that will be
1652 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1653 next and previous path separator, respectively.
1655 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1656 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1657 non-nil before enabling the mode.
1661 *** New option `mode-line-default-help-echo' specifies the help text
1662 (shown in a tooltip or in the echo area) for any part of the mode line
1663 that does not have its own specialized help text.
1665 *** You can now click mouse-3 in the coding system indicator to invoke
1666 `set-buffer-file-coding-system'.
1668 ** Server and client
1670 *** emacsclient now obeys string values for `initial-buffer-choice',
1671 if it is told to open a new frame without specifying any file to visit
1672 or expression to evaluate.
1674 *** New option `server-auth-key' specifies a shared server key.
1676 ** Emacs now generates backtraces on fatal errors.
1677 On encountering a fatal error, Emacs now outputs a textual description
1678 of the fatal signal, and a short backtrace on platforms like glibc
1679 that support backtraces.
1681 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1682 This minor mode replaces `toggle-read-only', which is now obsolete.
1684 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1685 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1686 respectively, without exiting from the prompt.
1688 ** In the Package Menu, newly-available packages are listed as "new",
1689 and sorted above the other "available" packages by default.
1691 ** If your Emacs was built from a repository checkout, the new variable
1692 `emacs-bzr-version' contains information about the bzr revision used.
1694 ** New option `create-lockfiles' specifies usage of lockfiles.
1695 It defaults to t. Changing it to nil inhibits the creation of lock
1696 files (use this with caution).
1698 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1699 variables on remote hosts.
1701 ** The entry for PCL-CVS has been removed from the Tools menu.
1702 The PCL-CVS commands are still available via the keyboard.
1704 ** Using "unibyte: t" in Lisp source files is obsolete.
1705 Use "coding: raw-text" instead.
1707 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1708 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1709 The previous binding, introduced in Emacs 24.1, was a mistake, because
1710 `C-c LETTER' bindings are reserved for user customizations.
1712 ** Internationalization
1714 *** New language environment: Persian.
1716 *** New input method `vietnamese-vni'.
1718 ** Nextstep (GNUstep / Mac OS X) port
1720 *** Support for fullscreen and the frame parameter fullscreen.
1722 *** A file dialog is used for open/save operations initiated from the
1726 * Editing Changes in Emacs 24.3
1728 ** Search and Replace
1730 *** Non-regexp Isearch now performs "lax" space matching.
1731 Each sequence of spaces in the supplied search string may match any
1732 sequence of one or more whitespace characters, as specified by the
1733 variable `search-whitespace-regexp'. (This variable is also used by a
1734 similar existing feature for regexp Isearch.)
1736 *** New Isearch command `M-s SPC' toggles lax space matching.
1737 This applies to both ordinary and regexp Isearch.
1739 *** New option `replace-lax-whitespace'.
1740 If non-nil, `query-replace' uses flexible whitespace matching too.
1743 *** Global `M-s _' starts a symbol (identifier) incremental search,
1744 and `M-s _' in Isearch toggles symbol search mode.
1745 `M-s c' in Isearch toggles search case-sensitivity.
1747 ** Navigation commands
1749 *** New binding `M-g c' for `goto-char'.
1751 *** New binding `M-g TAB' for `move-to-column'.
1753 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1754 interactively with no prefix arg. Previously, it moved to column 1.
1756 ** New option `yank-handled-properties' allows processing of text
1757 properties on yanked text, in ways that are more general than just
1758 removing them (as is done by `yank-excluded-properties').
1760 ** New option `delete-trailing-lines' specifies whether
1761 M-x delete-trailing-whitespace should delete trailing lines at the end
1762 of the buffer. It defaults to t.
1764 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1766 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1767 `ucs-insert' is now an obsolete alias for `insert-char'.
1769 ** The `z' key no longer has a binding in most special modes.
1770 It used to be bound to `kill-this-buffer', but `z' is too easy to
1773 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1774 It copies the region-rectangle as the last rectangle kill.
1778 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1780 *** New option `register-separator' specifies the register containing
1781 the text to put between collected texts for use with
1782 M-x append-to-register and M-x prepend-to-register.
1785 * Changes in Specialized Modes and Packages in Emacs 24.3
1787 ** Common Lisp emulation (CL)
1789 *** CL's main entry is now (require 'cl-lib).
1790 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1791 i.e., all its definitions have the "cl-" prefix (and internal definitions
1792 use the "cl--" prefix).
1794 If `cl' provided a feature under the name `foo', then `cl-lib'
1795 provides it under the name `cl-foo' instead; with the exceptions of the
1796 few `cl' definitions that had to use `foo*' to avoid conflicts with
1797 pre-existing Elisp entities. These have been renamed to `cl-foo'
1798 rather than `cl-foo*'.
1800 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1801 provide the old, non-prefixed names. Some exceptions are listed below:
1803 *** `cl-flet' is not like `flet' (which is deprecated).
1804 Instead it obeys the behavior of Common-Lisp's `flet'.
1805 In particular, in cl-flet function definitions are lexically scoped,
1806 whereas in flet the scoping is dynamic.
1808 *** `cl-labels' is slightly different from `labels'.
1809 The difference is that it relies on the `lexical-binding' machinery
1810 (as opposed to the `lexical-let' machinery used previously) to capture
1811 definitions in closures, so such closures will only work if `lexical-binding'
1814 *** `cl-letf' is not exactly like `letf'.
1815 The only difference is in details that relate to some deprecated usage
1816 of `symbol-function' in place forms.
1818 *** `progv' was rewritten to use the `let' machinery.
1819 A side effect is that variables without corresponding values are bound
1820 to nil rather than being made unbound.
1822 *** The following methods of extending `setf' are obsolete
1823 (use features from gv.el instead):
1824 `define-modify-macro' (use `gv-letplace')
1825 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1826 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1827 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1831 *** Changes are now highlighted using the same color scheme as in
1832 modern VCSes. Deletions are displayed in red (new faces
1833 `diff-refine-removed' and `smerge-refined-removed', and new definition
1834 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1835 and `smerge-refined-added', and new definition of `diff-added').
1837 *** The variable `diff-use-changed-face' defines whether to use the
1838 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1839 changes in context diffs.
1841 *** The new command `diff-delete-trailing-whitespace' removes trailing
1842 whitespace introduced by a diff.
1844 ** Ediff now uses the same color scheme as Diff mode.
1848 A new version of python.el, which provides several new features, including:
1849 per-buffer shells, better indentation, Python 3 support, and improved
1850 shell-interaction compatible with iPython (and virtually any other
1853 *** Some user options have been replaced/renamed, including (old -> new):
1854 **** python-indent -> python-indent-offset
1855 **** python-guess-indent -> python-indent-guess-indent-offset
1856 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1857 **** python-use-skeletons -> python-skeleton-autoinsert
1859 *** Some user options have been removed, including:
1861 **** `python-indent-string-contents': Strings are never indented.
1863 **** `python-honour-comment-indentation':
1864 Comments are always considered as indentation markers.
1866 **** `python-continuation-offset': Indentation is automatically
1867 calculated in a pep8 compliant way depending on the context.
1869 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1870 Have no direct mapping as the shell interaction is completely different.
1872 **** `python-python-command', `python-jython-command':
1873 Replaced by `python-shell-interpreter'.
1875 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1876 `python-pdbtrack-minor-mode-string', `python-source-modes':
1879 *** Some commands have been replaced (old -> new):
1880 **** python-insert-class -> python-skeleton-class
1881 **** python-insert-def -> python-skeleton-def
1882 **** python-insert-for -> python-skeleton-for
1883 **** python-insert-if -> python-skeleton-if
1884 **** python-insert-try/except -> python-skeleton-try
1885 **** python-insert-try/finally -> python-skeleton-try
1886 **** python-insert-while -> python-skeleton-while
1887 **** python-find-function -> python-nav-jump-to-defun
1888 **** python-next-statement -> python-nav-forward-sentence
1889 **** python-previous-statement -> python-nav-backward-sentence
1890 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1891 **** python-end-of-defun-function -> python-nav-end-of-defun
1892 **** python-send-buffer -> python-shell-send-buffer
1893 **** python-send-defun -> python-shell-send-defun
1894 **** python-send-region -> python-shell-send-region
1895 **** python-send-region-and-go -> emulate with python-shell-send-region
1896 and python-shell-switch-to-shell
1897 **** python-send-string -> python-shell-send-string
1898 **** python-switch-to-python -> python-shell-switch-to-shell
1899 **** python-describe-symbol -> python-eldoc-at-point
1903 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1905 *** The D-Bus object manager interface is implemented.
1907 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1908 if their value does not fit into Emacs's integer range.
1910 *** The function `dbus-call-method' is now non-blocking.
1911 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1913 *** Signals can also be sent as unicast messages.
1915 *** The argument list of `dbus-register-signal' has been extended,
1916 according to the new match rule types of D-Bus.
1918 *** `dbus-init-bus' supports private connections.
1920 *** There is a new function `dbus-setenv'.
1922 ** `desktop-path' no longer includes the "." directory.
1923 Desktop files are now located in ~/.emacs.d by default.
1927 *** `dired-do-async-shell-command' executes each file sequentially
1928 if the command ends in `;' (when operating on multiple files).
1929 Otherwise, it executes the command on each file in parallel.
1931 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1932 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1935 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1936 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1937 mark/unmark/flag all files in the active region.
1939 *** The minibuffer default for `=' (`dired-diff') has changed.
1940 It is now the backup file for the file at point, if one exists.
1941 In Transient Mark mode the default is the file at the active mark.
1943 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1944 The global binding for `M-=', `count-words-region' is in effect.
1948 *** New module "notifications", which can send a notification when you
1949 receive a private message or your nickname is mentioned.
1951 *** ERC will look up server/channel names via auth-source and use any
1954 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1955 only applies to messages sent by lurkers.
1957 ** reStructuredText mode
1959 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1960 fontification, comment handling, and customization have all been revised
1963 *** Support for `imenu' and `which-function-mode'.
1965 *** The reStructuredText syntax is more closely covered.
1966 Sphinx support has been improved.
1968 *** `rst-insert-list' inserts new list or continues existing lists.
1970 *** A negative prefix argument always works for `rst-adjust'.
1972 *** The window configuration is reset after displaying a TOC.
1974 *** The constant `rst-version' describes the rst.el package version.
1978 *** Support for percent literals and recognition of regular expressions
1979 in method calls without parentheses with more methods, including Cucumber
1982 *** Improved syntax highlighting and indentation.
1984 *** New command `ruby-toggle-block', bound to `C-c {'.
1986 *** Some non-standard keybindings/commands have been removed:
1988 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1990 **** `ruby-mark-defun'; use `mark-defun'.
1992 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1993 appropriate settings for the variables `beginning-of-defun-function'
1994 and `end-of-defun-function'.
1996 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1997 `reindent-then-newline-and-indent' and `newline' have been removed.
1999 ** Shell Script mode
2001 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2003 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2005 *** `sh-use-smie' lets you choose a new indentation and navigation code.
2009 *** The free software compiler GHDL is supported (and now the default).
2011 *** Support for the VHDL-AMS packages has been added/updated.
2013 *** Updated to the 2002 revision of the VHDL standard.
2015 *** Accepts \r and \f as whitespace.
2019 *** The faces used by Apropos are now directly customizable.
2020 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2021 see the `apropos' Custom group for details.
2023 *** The old options whose values specified faces to use have been removed
2024 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2025 `apropos-match-face' and `apropos-property-face'.).
2029 *** This package has been rewritten to use Tabulated List mode.
2031 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
2032 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2036 *** Algebraic simplification mode is now the default.
2037 To restrict to the limited simplifications given by the former
2038 default simplification mode, use `m I'.
2042 *** You can customize the header text that appears above each calendar month.
2043 See the variable `calendar-month-header'.
2045 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2047 *** The calendars produced by cal-html include holidays.
2048 Customize `cal-html-holidays' to change this.
2052 *** The major modes from the parser generators "Bovine" and "Wisent"
2053 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2054 are in `auto-mode-alist', and the corresponding manuals are included.
2058 **** Menu support for the "Configuration" feature. This allows users to
2059 choose the active configuration (such as debug or install) from the menu.
2061 **** New command `ede-set' to interactively set project-local variables.
2063 **** Support for compiling, debugging, and running in "generic" projects.
2065 **** Autoconf editing support for M4 macros with complex arguments.
2067 **** Compilation support for the "linux" project type.
2069 **** "simple" projects have been removed; use "generic" projects instead.
2073 **** Support for parsing #include statements inside a namespace in C/C++.
2075 **** Improved support for 'extern "C"' declarations in C/C++.
2077 **** The ability to ignore more common special C/C++ preprocessor symbols,
2078 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2079 If available, include cdefs.h as an additional source of preprocessor symbols.
2081 **** Improved C/C++ function pointer parsing.
2083 **** In Python, support for converting imports to include file names.
2085 **** Ability to dynamically determine the Python load path.
2087 **** Support for the Python 'WITH' and 'AT' keywords.
2089 **** Improved tooltip completion.
2093 **** The SRecode manual is now included.
2095 **** Tag generation supports constructor/destructor settings and system
2096 include differentiation.
2098 **** Addition of 'Framework' support: Frameworks are specified when a
2099 particular kind of library (such as Android) is needed in a common language
2102 **** Support for nested templates and let variables override based on priority.
2104 **** Support for merging tables from multiple related modes, such as
2105 default -> c++ -> arduino.
2107 ** Compile has a new option `compilation-always-kill'.
2111 *** `custom-reset-button-menu' now defaults to t.
2113 *** Non-option variables are never matched in `customize-apropos' and
2114 `customize-apropos-options' (i.e., the prefix argument does nothing for
2115 these commands now).
2119 *** The variables `term-default-fg-color' and `term-default-bg-color'
2120 are now deprecated in favor of the customizable face `term'.
2122 *** You can customize how to display ANSI terminal colors and styles
2123 by customizing the corresponding `term-color-<COLOR>',
2124 `term-color-underline' and `term-color-bold' faces.
2128 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2130 *** Remote processes are now also supported on remote MS-Windows hosts.
2134 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2135 Previously, this slot stored semicolon-separated attribute-value pairs
2136 appended to some imap URLs, but this is not compatible with RFC 3986.
2137 So now the `filename' slot stores the entire path and query components,
2138 and the `attributes' slot is always nil.
2140 *** New function `url-encode-url' for encoding a URI string.
2141 The `url-retrieve' function now uses this to encode its URL argument,
2142 in case that is not properly encoded.
2144 ** notifications.el supports now version 1.2 of the Notifications API.
2145 The function `notifications-get-capabilities' returns the supported
2148 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2149 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2150 `flymake-warning-bitmap'.
2152 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2153 specifying URL types that should be converted to remote file names at
2154 the FFAP prompt. The default is now '("ftp").
2156 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2157 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2159 ** New option `mouse-avoidance-banish-position' specifies where the
2160 `banish' mouse avoidance setting moves the mouse.
2162 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2163 closing brackets to be aligned with the line of the opening bracket.
2165 ** In Proced mode, new command `proced-renice' renices marked processes.
2167 ** New option `async-shell-command-buffer' specifies the buffer to use
2168 for a new asynchronous `shell-command' when the default output buffer
2169 `*Async Shell Command*' is already in use.
2171 ** SQL mode has a new option `sql-db2-escape-newlines'.
2172 If non-nil, newlines sent to the command interpreter will be escaped
2173 by a backslash. The default does not escape the newlines and assumes
2174 that the sql statement will be terminated by a semicolon.
2176 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2177 (and modes that derive from it), sorts the column at point, or the Nth
2178 column if a numeric prefix argument is given.
2180 ** `which-func-modes' now defaults to t, so Which Function mode, when
2181 enabled, applies to all applicable major modes.
2183 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2186 ** Follow mode no longer works by using advice.
2187 The option `follow-intercept-processes' has been removed.
2189 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2191 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2192 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2193 *** semantic-change-hooks -> semantic-change-functions
2194 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2195 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2196 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2197 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2198 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2199 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2200 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2201 *** rcirc-activity-hooks -> rcirc-activity-functions
2202 *** rcirc-print-hooks -> rcirc-print-functions
2203 *** dbus-event-error-hooks -> dbus-event-error-functions
2204 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2205 *** checkdoc-style-hooks -> checkdoc-style-functions
2206 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2207 *** archive-extract-hooks -> archive-extract-hook
2208 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2209 *** hfy-post-html-hooks -> hfy-post-html-hook
2210 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2211 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2212 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2213 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2215 ** Obsolete packages
2218 In most cases, assoc+member+push+delq work just as well.
2219 And in any case it's just a terrible package: ugly semantics, terrible
2220 inefficiency, and not namespace-clean.
2229 * Incompatible Lisp Changes in Emacs 24.3
2231 ** Docstrings starting with `*' no longer indicate user options.
2232 Only variables defined using `defcustom' are considered user options.
2233 The function `user-variable-p' is now an obsolete alias for
2234 `custom-variable-p'.
2236 ** The return values of `defalias', `defun' and `defmacro' have changed,
2237 and are now undefined. For backwards compatibility, `defun' and
2238 `defmacro' currently return the name of the newly defined
2239 function/macro, but this should not be relied upon.
2241 ** `random' by default now returns a different random sequence in
2242 every Emacs run. Use `(random S)', where S is a string, to set the
2243 random seed to a value based on S, in order to get a repeatable
2244 sequence in later calls.
2246 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2247 that substring is inserted literally even if the LITERAL arg is
2248 non-nil, instead of causing an error to be signaled.
2250 ** `select-window' now always makes the window's buffer current.
2251 It does so even if the window was selected before.
2253 ** The function `x-select-font' can return a font spec, instead of a
2254 font name as a string. Whether it returns a font spec or a font name
2255 depends on the graphical library.
2257 ** `face-spec-set' no longer sets frame-specific attributes when the
2258 third argument is a frame (that usage was obsolete since Emacs 22.2).
2260 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2262 ** The CL package's `get-setf-method' function no longer exists.
2263 Generalized variables are now part of core Emacs Lisp, and implemented
2264 differently to the way cl.el used to do it. It is not possible to
2265 define a compatible replacement for `get-setf-method'. See the file
2266 gv.el for internal details of the new implementation.
2268 ** The arguments of `dbus-register-signal' are no longer just strings,
2269 but keywords or keyword-string pairs. The old argument list will
2270 still be supported for Emacs 24.x.
2272 ** Miscellaneous name changes
2273 Some Lisp symbols have been renamed to correct their spelling,
2274 or to be more consistent with standard Emacs terminology.
2276 *** Renamed functions
2277 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2278 **** inactivate-input-method -> deactivate-input-method
2279 **** quail-inactivate -> quail-deactivate
2280 **** robin-inactivate -> robin-deactivate
2281 **** viper-inactivate-input-method -> viper-deactivate-input-method
2282 **** viper-inactivate-input-method-action ->
2283 viper-deactivate-input-method-action
2284 **** ucs-input-inactivate -> ucs-input-deactivate
2287 The old hooks are still supported for backward compatibility, but they
2288 are deprecated and will be removed eventually.
2289 **** input-method-inactivate-hook -> input-method-deactivate-hook
2290 **** robin-inactivate-hook -> robin-deactivate-hook
2291 **** quail-inactivate-hook -> quail-deactivate-hook
2293 *** Renamed variables
2294 **** follow-deactive-menu -> follow-inactive-menu
2295 **** inactivate-current-input-method-function ->
2296 deactivate-current-input-method-function
2298 ** Some obsolete functions, variables, and faces have been removed:
2299 *** `last-input-char', `last-command-char', `unread-command-char'
2300 *** `facemenu-unlisted-faces'
2301 *** `rmail-decode-mime-charset'
2302 *** `iswitchb-read-buffer'
2303 *** `sc-version', `sc-submit-bug-report'
2304 *** `set-char-table-default'
2305 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2306 *** `compile-internal'
2308 *** `mode-line-inverse-video'
2309 *** `follow-mode-off-hook'
2310 *** `cvs-commit-buffer-require-final-newline'
2311 (use `log-edit-require-final-newline' instead)
2312 *** `cvs-changelog-full-paragraphs'
2313 (use `log-edit-changelog-full-paragraphs' instead)
2314 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2315 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2316 *** `vc-master-templates' (use `vc-handled-backends' instead)
2317 *** `vc-checkout-carefully'
2320 * Lisp Changes in Emacs 24.3
2322 ** CL-style generalized variables are now in core Elisp.
2323 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2324 You can define your own generalized variables using `gv-define-simple-setter',
2325 `gv-define-setter', etc.
2327 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2328 This can significantly speed up execution of non-byte-compiled code,
2329 but can also bump into previously unnoticed cyclic dependencies.
2330 These are generally harmless: they will simply cause the macro calls
2331 to be left for later expansion (as before), but will result in a
2332 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2333 You may wish to restructure your code so this does not happen.
2335 ** New sampling-based Elisp profiler.
2336 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2337 When finished, use M-x profiler-stop. The sampling rate can be based on
2338 CPU time or memory allocations.
2340 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2341 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2343 ** New macros `setq-local' and `defvar-local'.
2345 ** Face underlining can now use a wave.
2347 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2348 of `read-regexp' accepts a string ending with a colon and space, and its
2349 second argument DEFAULTS can be a list of strings accessible via `M-n'
2350 in the minibuffer ahead of other hard-coded useful regexp-related values.
2351 More commands use `read-regexp' now to read their regexp arguments.
2355 *** New function `completion-table-with-quoting' to handle completion
2356 in the presence of quoting, such as file completion in shell buffers.
2358 *** New function `completion-table-subvert' to use an existing completion
2359 table, but with a different prefix.
2363 *** New error type and new function `user-error'.
2364 These do not trigger the debugger.
2366 *** New option `debugger-bury-or-kill', saying what to do with the
2367 debugger buffer when exiting debug.
2369 *** Set `debug-on-message' to enter the debugger when a certain
2370 message is displayed in the echo area. This can be useful when trying
2371 to work out which code is doing something.
2373 *** New var `inhibit-debugger', automatically set to prevent accidental
2374 recursive invocations.
2378 *** New command `fit-frame-to-buffer' adjusts the frame height to
2381 *** The command `fit-window-to-buffer' can adjust the frame height
2382 if the new option `fit-frame-to-buffer' is non-nil.
2384 *** New macro `with-temp-buffer-window', similar to
2385 `with-output-to-temp-buffer'.
2387 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2390 *** New option `switch-to-buffer-preserve-window-point' to restore a
2391 window's point when switching buffers.
2393 *** New display action alist entries `window-height' and `window-width'
2394 specify the size of new windows created by `display-buffer'.
2396 *** New display action alist entry `pop-up-frame-parameters', if
2397 non-nil, specifies frame parameters to give any newly-created frame.
2399 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2400 tells display action functions to avoid changing which frame is
2403 *** New display action alist entry `previous-window', if non-nil,
2404 specifies window to reuse in `display-buffer-in-previous-window'.
2406 *** New display action functions `display-buffer-below-selected',
2407 and `display-buffer-in-previous-window'.
2409 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2410 now accept a third argument to avoid choosing the selected window.
2412 *** Additional values recognized for option `window-combination-limit'.
2414 *** The following variables are obsolete, as they can be replaced by
2415 appropriate entries in the `display-buffer-alist' function introduced
2417 **** `dired-shrink-to-fit'
2418 **** `display-buffer-reuse-frames'
2419 **** `display-buffer-function'
2420 **** `special-display-buffer-names'
2421 **** `special-display-frame-alist'
2422 **** `special-display-function'
2423 **** `special-display-regexps'
2427 *** `current-time-string' no longer requires that its argument's year
2428 must be in the range 1000..9999. It now works with any year supported
2429 by the underlying C implementation.
2431 *** `current-time' now returns extended-format time stamps
2432 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2433 PSEC is typically a multiple of 1000 on current machines. Other
2434 functions that use this format, such as `file-attributes' and
2435 `format-time-string', have been changed accordingly. Old-format time
2436 stamps are still accepted.
2438 *** The format of timers in `timer-list' and `timer-idle-list' is now
2439 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2440 The PSECS slot is new, and uses picosecond resolution. It can be
2441 accessed via the new `timer--psecs' accessor.
2443 *** Last-modified time stamps in undo lists now are of the form
2444 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2448 *** Improved security when handling persistent objects:
2450 **** `eieio-persistent-read' now features optional arguments for specifying
2451 the class to load, as well as a flag stating whether subclasses are allowed;
2452 if provided, other classes will be rejected by the reader. For
2453 compatibility with existing code, if the class is omitted only a
2456 **** New specialized reader for pulling in classes and signaling errors
2457 without evaluation of suspicious code.
2459 **** All slots that contain objects must have a :type. Slots with lists
2460 of objects must use a new type predicate for a list of an object type.
2462 *** Support for `find-function' and similar utilities, through the addition
2463 of filename support to generated symbols.
2465 ** Floating point functions now always return special values like NaN,
2466 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2467 Previously, they returned NaNs on some platforms but signaled errors
2468 on others. The affected functions are acos, asin, tan, exp, expt,
2469 log, log10, sqrt, and mod.
2471 ** New fringe bitmap `exclamation-mark'.
2473 ** Miscellaneous changes to special forms and macros
2475 *** `defun' and `defmacro' are now macros rather than special forms.
2477 *** `kbd' is now a function rather than a macro.
2479 ** Miscellaneous new functions
2481 *** `set-temporary-overlay-map' sets up a temporary keymap that
2482 takes precedence over most other maps for a short while (normally one key).
2484 *** `autoloadp' tests if its argument is an autoloaded object.
2486 *** `autoload-do-load' performs the autoloading operation.
2488 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2490 *** `file-name-base' returns a file name sans directory and extension.
2492 *** `function-get' fetches a function property, following aliases.
2494 *** `posnp' tests if an object is a `posn'.
2496 *** `system-users' returns the user names on the system.
2498 *** `system-groups' returns the group names on the system.
2500 *** `tty-top-frame' returns the topmost frame of a text terminal.
2502 ** The following functions and variables are obsolete:
2503 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2504 *** `buffer-has-markers-at'
2505 *** `macro-declaration-function' (use `macro-declarations-alist')
2506 *** `window-system-version' (provides no useful information)
2507 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2508 *** `query-replace-interactive'
2509 *** `font-list-limit' (has had no effect since Emacs < 23)
2512 * Changes in Emacs 24.3 on Non-Free Operating Systems
2514 ** Cygwin builds can use the native MS Windows user interface.
2515 Pass `--with-w32' to configure. The default remains the X11 interface.
2517 ** Two new functions are available in Cygwin builds:
2518 `cygwin-convert-file-name-from-windows' and
2519 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2520 code to access the Cygwin file-name mapping machinery to convert
2521 between Cygwin and Windows-native file and directory names.
2523 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2524 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2525 `mouse-autoselect-window'.
2527 ** On MS Windows Vista and later Emacs now supports symbolic links.
2529 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2530 support for libxml2, even if its presence is detected.
2532 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2534 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2535 directories to the search path. You must add them yourself if you want them.
2538 * Changes in Emacs 24.2
2540 ** This is mainly a bug-fix release.
2543 * Installation Changes in Emacs 24.1
2545 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2546 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2547 also depend on Gtk+. You can disable them with --without-rsvg and
2550 ** Emacs can be compiled with GnuTLS support.
2551 This happens by default if a suitably recent version of the library is
2552 found at build time. To prevent this, use the configure option
2553 `--without-gnutls'. See below for GnuTLS features.
2555 ** Emacs can be compiled with SELinux support.
2556 This happens by default if a suitably recent version of the library is
2557 found at build time. To prevent this, use the configure option
2558 `--without-selinux'. See below for SELinux features.
2560 ** Emacs can be compiled with ImageMagick support.
2561 This happens by default if a suitably recent version of the library is
2562 found at build time. To prevent this, use the configure option
2563 `--without-imagemagick'. See below for ImageMagick features.
2564 This feature is not available for the Nextstep or MS ports.
2566 ** Emacs can be compiled with libxml2 support.
2567 This happens by default if a suitably recent version of the library is
2568 found at build time. To prevent this, use the configure option
2569 `--without-xml2'. See below for libxml2 features.
2571 ** By default, the installed Info and man pages are compressed.
2572 You can disable this by configuring --without-compress-info.
2574 ** New configure option --with-wide-int.
2575 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2576 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2579 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2580 These provide no new functionality, they just remove the need to edit
2581 lib-src/Makefile by hand in order to use the associated features.
2583 ** New configure option --enable-use-lisp-union-type.
2584 This is only useful for Emacs developers to debug certain types of bugs.
2585 This is not a new feature; only the configure flag is new.
2587 ** The standalone programs digest-doc and sorted-doc are removed.
2588 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2590 ** The standalone program `fakemail' is removed.
2591 If you need it, feedmail.el provides a superset of the functionality.
2594 * Startup Changes in Emacs 24.1
2596 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2597 command line arguments, and the EMACS_UNIBYTE environment variable, no
2598 longer have any effect. (They were declared obsolete in Emacs 23.)
2600 ** New command line option `--no-site-lisp' removes site-lisp directories
2601 from load-path. -Q now implies this. This option does not affect the
2602 EMACSLOADPATH environment variable (and hence has no effect for
2606 * Changes in Emacs 24.1
2610 *** Many packages now use the `completion-at-point' command,
2611 rather than implementing separate completion commands.
2613 *** `completion-at-point' now handles tags and semantic completion.
2615 *** Completion in a non-minibuffer now tries to detect the end of completion
2616 and pops down the *Completions* buffer accordingly.
2618 *** New option `completion-cycle-threshold' allows completion cycling.
2620 *** New option `completion-category-overrides' for overriding the
2621 default completion style in certain circumstances.
2623 *** New completion style `substring'.
2625 *** Completion of buffer names uses `substring' completion by default.
2627 *** The option `widget-complete-field' has been removed.
2631 *** The first time you try sending mail, Emacs asks for a mail method.
2632 This is implemented by a new default for `send-mail-function', which
2633 is `sendmail-query-once'. This offers to use the smtpmail package, or
2634 to use the old defaults relying on external mail facilities
2635 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2636 `mailclient-send-it' on Windows).
2638 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2639 transfers the report to your desktop's preferred mail client, if there
2640 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2643 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2644 and Mail mode changes
2646 ** Emacs server and client changes
2648 *** New option `server-port' specifies the port for TCP Emacs servers.
2650 *** New emacsclient argument -q/--quiet suppresses some status messages.
2652 *** New emacsclient argument --frame-parameters specifies the frame
2653 parameters of any newly-created graphical frame.
2655 *** If emacsclient shuts down due to Emacs signaling an error,
2656 its exit status is 1.
2658 *** New emacsclient argument --parent-id ID.
2659 This opens a client frame in parent X window ID, via XEmbed, similar
2660 to the --parent-id argument to Emacs.
2662 ** Internationalization changes
2664 *** Emacs now supports display and editing of bidirectional text.
2665 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2666 displayed in the correct visual order as expected by users of those
2667 scripts. The display reordering is a "full bidirectionality" class
2668 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2669 with no RTL text should look exactly the same as before.
2671 **** New buffer-local variable `bidi-display-reordering'.
2672 To disable display reordering in a buffer, change this to nil.
2674 **** New buffer-local variable `bidi-paragraph-direction'.
2675 If nil (the default), Emacs determines the base direction of each
2676 paragraph from its text, as specified by the UBA. Setting the value
2677 to `right-to-left' or `left-to-right' forces a base direction on each
2680 Paragraphs with right-to-left base direction are displayed starting at
2681 the right window edge.
2683 *** Enhanced support for characters with no glyphs in available fonts,
2684 or, on text terminals, characters that cannot be encoded by the
2685 terminal coding system. The new option `glyphless-char-display-control'
2686 specifies how to display them: as a hexadecimal code in a box, a thin
2687 1-pixel space, an empty box, etc.
2689 *** New input methods for Farsi and Bulgarian
2690 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2692 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2693 (U+2010 and U+2011).
2695 *** New Hebrew translation of the Emacs Tutorial.
2696 Type `C-u C-h t' to choose it in case your language setup doesn't
2697 automatically select it.
2699 ** An Emacs Lisp package manager is now included.
2700 This is a convenient way to download and install additional packages,
2701 from a package repository at http://elpa.gnu.org.
2703 *** M-x list-packages shows a list of packages, which can be
2704 selected for installation.
2706 *** New command `describe-package', bound to `C-h P'.
2708 *** By default, all installed packages are loaded automatically when
2709 Emacs starts up. To disable this, set `package-enable-at-startup' to
2710 nil. To specify the packages to load, customize `package-load-list'.
2712 ** Custom theme changes
2714 *** New command `M-x customize-themes', which provides a convenient
2715 interface for enabling and disabling Custom themes.
2717 *** New option `custom-theme-load-path' is the load path for themes.
2718 Emacs no longer looks for Custom themes in `load-path'. The default
2719 value of `custom-theme-load-path' says to look for themes in
2720 `custom-theme-directory', followed by a subdirectory of
2721 `data-directory' named "themes/", which contains a small selection of
2722 built-in Custom themes.
2724 *** New option `custom-safe-themes' records known-safe theme files.
2725 If a theme is not in this list, Emacs queries before loading it, and
2726 offers to save the theme to `custom-safe-themes' automatically. By
2727 default, all themes included in Emacs are treated as safe.
2729 ** Improved GTK integration
2731 *** GTK scroll-bars are now placed on the right by default.
2732 The function `set-scroll-bar-mode' can change this.
2734 *** GTK tool bars can have just text, just images or images and text.
2735 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2736 the default is taken from desktop settings.
2738 *** GTK tool bars can be placed on any edge of the frame.
2739 The frame-parameter tool-bar-position controls this. It takes the
2740 values top, left, right or bottom. The Options => Show/Hide menu has
2743 *** The default colors for selected text (the `region' face) are taken
2744 from the GTK theme when Emacs is built with GTK.
2746 *** Emacs uses GTK tooltips by default if built with GTK.
2747 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2749 ** Graphical interface changes
2751 *** On graphical displays, the mode-line no longer ends in dashes.
2752 Also, the first dash (which does not indicate anything) is just
2753 displayed as a space.
2755 *** `menu-bar-select-buffer-function' lets you choose another operation
2756 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2758 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2759 built with Xft. These fonts can be set via X resources, for example:
2760 Emacs.pane.menubar.font: Courier-12
2764 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2765 or if it receives a SIGINT signal in batch mode.
2767 *** `kill-emacs-hook' is now also run in batch mode.
2768 Third-party code which adds to `kill-emacs-hook' should check if they
2769 do the right thing in batch mode.
2771 ** Scrolling changes
2773 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2774 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2775 of buffer at first key-press (instead they move to top/bottom of buffer)
2776 when `scroll-error-top-bottom' is non-nil.
2778 *** New option `scroll-error-top-bottom' (see above).
2780 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2781 scroll a line instead of full screen.
2783 *** New property `scroll-command' should be set on a command's symbol to
2784 define it as a scroll command affected by `scroll-preserve-screen-position'.
2786 *** If you customize `scroll-conservatively' to a value greater than 100,
2787 Emacs will never recenter point in the window when it scrolls due to
2788 cursor motion commands or commands that move point (e.f., `M-g M-g').
2789 Previously, you needed to use `most-positive-fixnum' as the value of
2790 `scroll-conservatively' to achieve the same effect.
2792 *** "Aggressive" scrolling now honors the scroll margins.
2793 If you customize `scroll-up-aggressively' or
2794 `scroll-down-aggressively' and move point off the window, Emacs now
2795 scrolls the window so as to avoid positioning point inside the scroll
2798 ** Basic SELinux support has been added.
2799 This requires Emacs to be linked with libselinux at build time.
2801 *** Emacs preserves the SELinux file context when backing up.
2802 Also, the function `copy-file' has an extra optional argument for
2803 preserving SELinux context, and the return value of `backup-buffer'
2804 now includes the SELinux context.
2806 *** New functions `file-selinux-context' and `set-file-selinux-context'
2807 get and set the SELinux context of a file.
2811 *** `delete-by-moving-to-trash' now only affects commands that specify
2812 trashing. This avoids inadvertently trashing temporary files.
2814 *** Calling `delete-file' or `delete-directory' with a prefix argument
2815 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2817 ** File- and directory-local variable changes
2819 *** You can stop directory local vars from applying to subdirectories.
2820 Add an element (subdirs . nil) to the alist portion of any variables
2821 settings to indicate that the section should not apply to
2824 *** Directory local variables can apply to some file-less buffers.
2825 Affected modes include dired, vc-dir, and log-edit. For example,
2826 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2827 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2828 `hack-dir-local-variables-non-file-buffer' to support this.
2830 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2831 Instead, use "eval: (minor-mode 1)".
2833 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2834 to `inhibit-local-variables-regexps'. As the name suggests, it now
2835 applies to ALL file local variables, not just -*- lines. The
2836 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2841 *** The `quit-window' command now restores the last buffer displayed
2842 in the quitted window.
2844 *** Resizing an Emacs frame now preserves proportional window sizes,
2845 modulo restrictions like window minimum sizes and fixed-size windows.
2847 *** The behavior of `display-buffer' is now customizable in detail.
2849 **** New option `display-buffer-base-action' specifies a list of
2850 user-determined display "actions" (functions and optional arguments
2851 for choosing the displaying window).
2853 This takes precedence over the default display action, which is
2854 specified by `display-buffer-fallback-action'.
2856 **** New option `display-buffer-alist' maps buffer name regexps to
2857 display actions, taking precedence over `display-buffer-base-action'.
2859 *** New option `window-combination-limit'.
2860 The new option `window-combination-limit' allows to return the space
2861 obtained for resizing or creating a window more reliably to the window
2862 from which such space was obtained.
2864 *** New option `window-combination-resize'.
2865 The new option `window-combination-resize' allows to split a window that
2866 otherwise cannot be split because it's too small by stealing space from
2867 other windows in the same combination. Subsequent resizing or deletion
2868 of the window will resize all windows in the same combination as well.
2870 *** New option `frame-auto-hide-function' lets you choose between
2871 iconifying or deleting a frame when burying a buffer in a dedicated
2872 frame, or quitting a window showing a buffer in a frame of its own.
2874 *** New commands `maximize-window' and `minimize-window'.
2875 These maximize and minimize the size of a window within its frame.
2877 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2878 These functions allow to navigate through the live buffers that have
2879 been shown in a specific window.
2881 ** Minibuffer changes
2883 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2884 This is handy for minibuffer-only frames, and is also used for the feature
2885 where mouse-1 pops up *Messages*"', which can now easily be changed.
2887 *** Minibuffers set `truncate-lines' to nil.
2888 If you want to change the value to something else, you could use
2889 for example `minibuffer-setup-hook'.
2891 ** `auto-mode-case-fold' is now enabled by default.
2893 ** `backup-by-copying-when-mismatch' now defaults to t.
2895 ** New basic faces `error', `warning', `success'.
2896 These are used to highlight text indicating failure, caution or
2897 successful operation.
2899 ** New option `list-colors-sort' defines the color sort order
2900 for `list-colors-display'.
2902 ** The variable `focus-follows-mouse' now always defaults to nil.
2905 * Editing Changes in Emacs 24.1
2909 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2910 `isearch-yank-line'.
2912 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2913 `isearch-yank-kill'.
2915 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2917 ** New commands `count-words-region' and `count-words'.
2919 *** M-= is bound to `count-words-region', not `count-lines-region'.
2920 The `count-words-region' command, when called interactively, reports
2921 the number of lines, words, and characters in the region. It is a
2922 superset of the old `count-lines-region', which is now an obsolete
2925 ** The command `just-one-space' (M-SPC), if given a negative argument,
2926 also deletes newlines around point.
2930 *** New option `delete-active-region'.
2931 If non-nil, [delete] and DEL delete the region if it is active and no
2932 prefix argument is given. If set to `kill', those commands kill
2935 *** New command `delete-forward-char', bound to [delete].
2936 This is meant for interactive use, and obeys `delete-active-region'.
2937 The command `delete-char' does not obey `delete-active-region'.
2939 *** `delete-backward-char' is now a Lisp function.
2940 Apart from obeying `delete-active-region', its behavior is unchanged.
2941 However, the byte compiler now warns if it is called from Lisp; Lisp
2942 callers should use delete-char with a negative argument instead.
2944 *** The option `mouse-region-delete-keys' has been deleted.
2946 ** Selection changes.
2948 The default handling of clipboard and primary selections has been
2949 changed to conform with modern X applications. In short, most
2950 commands for killing and yanking text now use the clipboard, while
2951 mouse commands use the primary selection.
2953 In the following, we provide a list of these changes, followed by a
2954 list of steps to get the old behavior back if you prefer that.
2956 *** `select-active-regions' now defaults to t.
2957 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2958 the kill ring. The selected text is put in the primary selection, if
2959 the system possesses a separate primary selection facility (e.g. X).
2961 **** `select-active-regions' also accepts a new value, `only'.
2962 This means to only set the primary selection for temporarily active
2963 regions (usually made by mouse-dragging or shift-selection);
2964 "ordinary" active regions, such as those made with C-SPC followed by
2965 point motion, do not alter the primary selection.
2967 **** `mouse-drag-copy-region' now defaults to nil.
2969 *** mouse-2 is now bound to `mouse-yank-primary'.
2970 This pastes from the primary selection, ignoring the kill-ring.
2971 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2973 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2975 *** `x-select-enable-primary' now defaults to nil.
2976 Thus, commands that kill text or copy it to the kill-ring (such as
2977 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2979 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2980 exactly equivalent to M-w, C-w, and C-y respectively.
2982 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2983 non-nil by default, as Windows does not support the primary selection
2984 between applications.
2986 *** To return to the previous behavior, do the following:
2988 **** Change `select-active-regions' to nil.
2989 **** Change `mouse-drag-copy-region' to t.
2990 **** Change `x-select-enable-primary' to t (on X only).
2991 **** Change `x-select-enable-clipboard' to nil.
2992 **** Bind `mouse-yank-at-click' to mouse-2.
2994 *** Support for X cut buffers has been removed.
2996 *** X clipboard managers are now supported.
2997 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2999 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3000 in the current rectangle. With a prefix argument, this prompts for a
3001 number to count from and for a format string.
3003 ** `redisplay-dont-pause' now defaults to t.
3004 This makes Emacs feel more responsive to editing commands that arrive
3005 at high rate, e.g. if you lean on some key, because stopping redisplay
3006 in the middle (when this variable is nil) forces more expensive
3007 updates later on, and Emacs appears to be unable to keep up.
3009 ** The behavior of <TAB> for active regions in Text mode has changed.
3010 In Text and related modes, typing <TAB> (`indent-for-tab-command')
3011 when the region is active causes Emacs to indent all the lines in the
3012 region, aligning them with the line previous to the first line in the
3013 region (or with the left margin if there is no previous line).
3015 ** When `occur' is called with a prefix argument, matching strings are
3016 collected into the `*Occur*' buffer without line numbers. If there
3017 are parenthesized subexpressions in the specified regexp, `occur'
3018 reads replacement text that may contain \\& and \\N whose convention
3019 follows `replace-match'.
3022 * Changes in Specialized Modes and Packages in Emacs 24.1
3024 ** Archive Mode has basic support for browsing and updating 7z archives.
3028 *** BibTeX mode now supports biblatex.
3029 Use the variable `bibtex-dialect' to select different BibTeX dialects.
3030 `bibtex-entry-field-alist' is now an obsolete alias for
3031 `bibtex-BibTeX-entry-alist'.
3033 *** New command `bibtex-search-entries', bound to C-c C-a.
3035 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
3037 *** New variable `bibtex-search-entry-globally'.
3041 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3043 *** The default browser used by the package is now the "xdg-open" program,
3044 on platforms that support it. This calls your desktop's preferred browser.
3048 *** Support for musical notes.
3050 *** Support for logarithmic units.
3052 *** No longer uses the tex prefix for TeX specific unit names when
3053 using TeX or LaTeX mode.
3055 *** New option to highlight selections using faces.
3057 *** `calc-histogram' has the option of using a vector to determine the bins.
3059 *** New "O" option prefix.
3061 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3063 ** Calendar, Diary, and Appt
3065 *** Diary entries can contain non-printing "comments".
3066 See the variable `diary-comment-start'.
3068 *** Appointments can specify their individual warning times.
3069 See the variable `appt-warning-time-regexp'.
3071 *** The function specified by `appt-disp-window-function' may be passed
3072 lists of arguments if multiple appointments are due at similar times.
3073 If you are using a custom function for this, you should update it.
3075 *** New function `diary-hebrew-birthday'.
3077 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3078 may no longer be nil, but must all be strings.
3080 *** The obsolete (since Emacs 22.1) method of enabling the appt
3081 package by adding `appt-make-list' to `diary-hook' has been removed.
3082 Use `appt-activate' instead.
3084 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3085 appt-issue-message (use the function appt-activate)
3086 appt-visible/appt-msg-window (use the variable appt-display-format)
3088 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3089 view-diary-entries, list-diary-entries, show-all-diary-entries
3093 *** New feature to "guess" the style in an existing buffer.
3094 The main entry point is M-x c-guess.
3096 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3098 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3099 Thus C-M-a will, by default, go to the beginning of the immediate function,
3102 *** "Macros with semicolons" can be registered for correct indentation.
3103 Where such a macro ends a line (no semicolon) the next statement is no longer
3104 parsed as a statement continuation.
3106 ** Comint and modes derived from it use the standard completion code.
3110 *** Compilation mode can be used without Font Lock mode.
3111 `compilation-parse-errors-function' is now obsolete.
3113 *** New variable `compilation-filter-start', which is bound while
3114 `compilation-filter-hook' runs. It records the start position of the
3115 text inserted by `compilation-filter'.
3117 *** `compilation-error-screen-columns' and `compilation-first-column'
3118 are obeyed in the editing buffer. So programming language modes can
3119 set them, whereas previously only the value in the *Compilation*
3124 *** Customize buffers now contain a search field.
3125 The search is performed using `customize-apropos'.
3126 To turn off the search field, set `custom-search-field' to nil.
3128 *** Options in customize group buffers start out hidden if not customized.
3129 Use the arrow to the left of the option name to toggle visibility.
3131 *** custom-buffer-sort-alphabetically now defaults to t.
3133 *** The color widget now has a "Choose" button, which allows you to
3134 choose a color via `list-colors-display'.
3138 *** It is now possible to access buses other than the default system
3141 *** The `dbus-register-method' and `dbus-register-property' functions
3142 optionally do not register names.
3144 *** The new function `dbus-register-service' registers a known service
3145 name on a D-Bus without also registering a property or a method.
3149 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3150 if called with a prefix argument, read a file name from the minibuffer
3151 instead of using the current buffer.
3153 *** The "dired local variables" feature of Dired-x is obsolete.
3154 The standard directory local variables feature replaces it.
3158 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3159 controlling attempts to autojoin a channel.
3161 *** New variable `erc-coding-system-precedence': If we use `undecided'
3162 as the server coding system, this variable will then be consulted.
3163 The default is to decode strings that can be decoded as utf-8 as
3164 utf-8, and do the normal `undecided' decoding for the rest.
3168 *** The default value of `eshell-directory-name' has changed
3169 to be an "eshell" directory in `user-emacs-directory'.
3170 The old "~/.eshell/" directory is still used if it exists, though.
3174 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3175 It now supports multithread non-stop debugging and simultaneous
3176 debugging of several threads.
3180 *** RET (`image-toggle-animation') toggles animation, if applicable.
3181 Animation plays once, unless the option `image-animate-loop' is non-nil.
3185 *** New command M-x info-display-manual displays a named Info manual.
3186 If that manual is already visited in some Info buffer, it displays
3187 that buffer. (This is handy if you have many manuals in many *info*
3188 buffers, and don't remember the name of the buffer visiting the manual
3189 you want to consult.) Otherwise, it loads and displays the manual.
3191 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3192 This is for compatibility with the stand-alone Info reader program,
3193 and also because `Info-edit' is a rarely used command that is disabled
3196 ** Mail mode changes (not Message mode)
3198 *** New command M-x mail-add-attachment for adding MIME attachments
3200 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3201 (Its name is misleading, since it has nothing to do with MIME
3202 attachments.) The old name is now an obsolete alias to the new name.
3204 ** MH-E has been updated to MH-E version 8.3.1.
3205 See MH-E-NEWS for details.
3207 ** Modula-2 mode provides auto-indentation.
3209 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3211 ** nXML mode no longer binds C-RET to `nxml-complete'.
3212 Completion is now performed via `completion-at-point', bound to C-M-i
3213 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3214 default), this performs tag completion.
3216 ** Org mode has been updated to version 7.8.09.
3217 See ORG-NEWS for details.
3219 ** Prolog mode has been completely revamped, with lots of additional
3220 functionality such as more intelligent indentation, electricity,
3221 support for more variants, including Mercury, and a lot more.
3225 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3226 in the Rmail incoming message.
3228 *** The variable `rmail-message-filter' no longer has any effect.
3229 This change was made in Emacs 23.1 but was not advertised at the time.
3230 Try using `rmail-show-message-hook' instead.
3234 *** M-x shell prompts for the shell path name if the default directory
3235 is a remote file name and neither the environment variable $ESHELL nor
3236 the variable `explicit-shell-file-name' is set.
3238 *** TAB is now bound to the standard `completion-at-point' command,
3239 which now implements the pcomplete rules for shell command completion.
3243 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3244 if the mail server supports them. This uses either built-in GnuTLS
3245 support, or the starttls.el library. Customize `smtpmail-stream-type'
3248 *** The variable `smtpmail-auth-credentials' has been removed.
3249 By default, the information is now stored in the file ~/.authinfo.
3250 This was the default value of smtpmail-auth-credentials. If you had
3251 customized smtpmail-auth-credentials to a list of user names and
3252 passwords, those settings are not used. During your first connection
3253 to the smtp server, Emacs will prompt for the user name and password,
3254 and offer to save them to ~/.authinfo. Or you can manually copy the
3255 credentials to ~/.authinfo. For example, if you had
3257 (setq smtpmail-auth-credentials
3258 '(("mail.example.org" 25 "jim" "s!cret")))
3260 then the equivalent line in ~/.authinfo would be
3262 machine mail.example.org port 25 login jim password s!cret
3264 See the auth-source manual for more information, e.g. on encrypting
3265 the credentials file.
3267 *** The variable `smtpmail-starttls-credentials' has been removed.
3268 If you had that set, you need to put
3270 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3272 in your ~/.authinfo file instead.
3274 *** SMTPmail defaults to using the address in the From: header as the
3275 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3276 to the address you wish to use instead.
3280 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3281 and `sql-oracle-scan-on'.
3283 *** New options controlling prompting for login parameters.
3284 Each supported product has a custom variable `sql-*-login-params',
3285 which is a list of the parameters to be prompted for before a
3286 connection is established.
3288 *** The command `sql-product-interactive' now takes a prefix argument,
3289 which causes it to prompt for an SQL product.
3291 *** Product-specific SQL interactive commands now take prefix arguments.
3292 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3293 given a prefix argument, prompt for a name for the SQL interactive
3294 buffer. This reduces the need for calling `sql-rename-buffer'.
3296 *** SQL interactive modes suppress command continuation prompts, and
3297 replace tabs with spaces. The first change impacts multiple line SQL
3298 statements entered with C-j between each line, statements yanked into
3299 the buffer and statements sent with `sql-send-*' functions. The
3300 second prevents the MySQL and Postgres interpreters from listing
3301 object name completions when sent text via `sql-send-*' functions.
3303 *** New command `sql-connect' starts a predefined SQLi session,
3304 using the login parameters from `sql-connection-alist'.
3306 *** New "Save Connection" menu item in SQLi buffers.
3307 This gathers the login params specified for the SQLi session, if it
3308 was not started by a connection, and saves them as a new connection.
3310 *** New commands for listing database objects and details:
3311 sql-list-all and sql-list-table.
3313 *** An API for manipulating SQL product definitions has been added.
3317 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3321 *** New inline access method "ksu" (kerberized su).
3323 *** The following access methods are discontinued: "ssh1_old",
3324 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3326 *** The user option `remote-file-name-inhibit-cache' controls whether
3327 remote file attributes are cached for better performance.
3329 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3330 default value to "".
3332 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3333 for remote machines which support SELinux.
3335 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3336 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3337 the degree of parallelism.
3339 ** VC and related modes
3341 *** Support for pulling on distributed version control systems.
3342 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3343 supported (currently with Bzr, Git, and Mercurial), to update the
3344 current branch and working tree. A prefix argument means to prompt
3345 the user for specifics, e.g. a pull location.
3347 *** `vc-update' is now an alias for `vc-pull'.
3349 *** Support for merging on distributed version control systems.
3350 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3351 is supported (currently with Bzr, Git, and Mercurial), to merge
3352 changes from another branch into the current one. It prompts for
3353 specifics, e.g. a merge source.
3355 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3356 shows a diff while querying the user. It defaults to t.
3358 *** Log entries in some Log View buffers can be toggled to display a
3359 longer description by typing RET (log-view-toggle-entry-display).
3360 This is currently supported for Bzr, Git, and Mercurial (to support
3361 another backend, define a `log-view-expanded-log-entry-function').
3362 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3363 use this to display the full log entry for the revision at point.
3365 *** New command `vc-ediff' allows visual comparison of two revisions
3366 of a file similar to `vc-diff', but using ediff backend.
3368 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3369 this was not advertised at the time.
3371 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3372 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3373 this was not advertised at the time.
3379 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3381 *** partial-completion-mode (complete.el) is obsolete.
3382 You can get a comparable behavior with:
3383 (setq completion-styles '(partial-completion initials))
3384 (setq completion-pcm-complete-word-inserts-delimiters t)
3386 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3388 *** pgg is obsolete (use EasyPG instead).
3390 *** sregex.el is obsolete, since rx.el is a strict superset.
3392 *** s-region.el and pc-select.el are obsolete.
3393 They are superseded by shift-select-mode, enabled by default since 23.1.
3395 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3399 *** The Landmark game is now invoked with `landmark', not `lm'.
3400 Its functions and variables have been similarly renamed.
3402 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3403 (This interfered with cua-mode.)
3405 *** f90.el has some support for Fortran 2008 syntax.
3407 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3409 *** New command `nato-region' converts text to NATO phonetic alphabet.
3412 * New Modes and Packages in Emacs 24.1
3414 ** Occur Edit mode applies edits made in *Occur* buffers to the
3415 original buffers. It is bound to "e" in Occur mode.
3417 ** New global minor mode electric-pair-mode.
3418 When enabled, typing an open parenthesis automatically inserts the
3419 matching closing one.
3421 ** New global minor mode electric-indent-mode.
3422 When enabled, typing certain characters triggers reindentation.
3423 Major modes wishing to use this can set electric-indent-chars or
3424 electric-indent-functions.
3426 ** New global minor mode electric-layout-mode.
3427 When enabled, typing certain characters automatically inserts newlines.
3428 Major modes wishing to use this can set electric-layout-rules.
3430 ** tabulated-list.el provides a generic major mode for tabulated data,
3431 from which other modes can be derived.
3433 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3435 ** secrets.el is an implementation of the Secret Service API, an
3436 interface to password managers like GNOME Keyring or KDE Wallet. The
3437 Secret Service API requires D-Bus for communication. The command
3438 `secrets-show-secrets' offers a buffer with a visualization of the
3441 ** notifications.el provides an implementation of the Desktop
3442 Notifications API. It requires D-Bus for communication.
3444 ** soap-client.el supports access to SOAP web services from Emacs.
3445 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3447 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3449 ** New emacs-lock.el package.
3450 The previous version has been moved to obsolete/old-emacs-lock.el.
3451 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3452 against exiting Emacs and killing the buffer can be set separately.
3453 The mechanism for automatically turning off protection for buffers
3454 with dead inferior processes has been generalized.
3457 * Incompatible Lisp Changes in Emacs 24.1
3459 ** Passing a nil argument to a minor mode function call now ENABLES
3460 the minor mode unconditionally. This is so that you can write e.g.
3462 (add-hook 'text-mode-hook 'foo-mode)
3464 to enable foo-mode in Text mode buffers, removing the need for
3465 `turn-on-foo-mode' style functions. This affects all mode commands
3466 defined by `define-minor-mode'. If called interactively, the mode
3467 command still toggles the minor mode.
3469 ** The return value of `backup-buffer' has changed.
3470 It is now a list of three elements, where the second element is a list
3471 describing the original file's SELinux context. If Emacs or the
3472 system lacks SELinux support, the context list is (nil nil nil nil).
3473 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3475 ** `char-direction-table' and the `char-direction' function were deleted.
3476 They were buggy and inferior to the new support of bidirectional
3477 editing introduced in Emacs 24. If you need the bidirectional
3478 properties of a character, use `get-char-code-property' with the last
3479 argument `bidi-class'.
3481 ** `copy-directory' now copies the source directory as a subdirectory
3482 of the target directory, if the latter is an existing directory. The
3483 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3484 the contents directly into a pre-existing target directory.
3486 ** For mouse click input events in the text area, the Y pixel
3487 coordinate in the POSITION list now counts from the top of the text
3488 area, excluding any header line. Previously, it counted from the top
3491 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3492 been further reduced. Now a backquote not followed by a space is
3493 always treated as a "new-style" backquote. Please remove all
3494 "old-style" backquotes from your code. If your code uses backquotes
3495 as documented in the Elisp manual, and compiles without warning, then
3496 you have nothing to do in this regard. Code not following the
3497 appropriate conventions may fail to compile.
3499 The most common cause of trouble seems to be an old-style backquote
3500 followed by a newline. Another cause of trouble is vector notation
3501 for key sequence notation: instead of [(control ,)] and [(control ')],
3502 you should write [(control ?,)] and [(control ?')], which will work in
3505 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3506 was not advertised at the time. The function `custom-initialize-delay'
3507 replaced all known uses.
3509 ** `view-buffer' now treats special mode-class in the same way that
3510 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3511 major mode is special).
3513 ** Menu and tool bar changes
3515 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3516 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3517 With these alist entries omitted, `make-frame' checks the value of the
3518 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3519 a menu-bar or tool-bar, respectively. If the alist entries are added,
3520 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3522 *** The menu bar bindings's caches are not used any more.
3523 Use (where-is-internal <def> nil t) instead.
3525 ** Regions created by mouse dragging are now normal active regions,
3526 similar to those created by shift-selection (see Selection changes
3527 above). In previous Emacs versions, these regions were delineated by
3528 `mouse-drag-overlay'; that variable has been removed.
3530 ** The fourth argument of `filter-buffer-substring' has been removed.
3531 If you want to remove text properties from the final result, simply
3532 pass the result through substring-no-properties.
3534 ** cl.el no longer provides `cl-19'.
3536 ** The following obsolete functions and aliases have been removed
3537 (the appropriate new function is given in parentheses; "not needed"
3538 means you can just remove all calls to the function in question):
3540 *** `comint-kill-output' (`comint-delete-output')
3541 *** `decompose-composite-char' (`char-to-string')
3542 *** `outline-visible' (`outline-invisible-p')
3543 *** `internal-find-face' (`facep')
3544 *** `internal-get-face' (`facep and check-face')
3545 *** `frame-update-faces' (not needed)
3546 *** `frame-update-face-colors' (`frame-set-background-mode')
3547 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3548 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3549 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3550 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3551 *** `x-make-font-unbold' (`make-face-unbold')
3552 *** `x-make-font-unitalic' (`make-face-unitalic')
3553 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3554 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3555 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3556 *** `char-bytes' (== 1)
3557 *** `isearch-return-char' (`isearch-printing-char')
3558 *** `make-local-hook' (not needed)
3559 *** `set-screen-height' (`set-frame-height')
3560 *** `set-screen-width' (`set-frame-width')
3562 ** The following obsolete variables and varaliases have been removed
3563 (the appropriate new variable is given in parentheses):
3565 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3566 *** `vc-header-alist' (`vc-BACKEND-header')
3567 *** `directory-sep-char' (== ?/)
3568 *** `font-lock-defaults-alist' (`font-lock-defaults')
3569 *** `e' (`float-e').
3571 ** The following obsolete files were removed:
3572 sc.el, x-menu.el, rnews.el, rnewspost.el
3574 ** The format of the finder-inf.el file has changed, since the Finder
3575 mechanism is now based on the package system. The variable
3576 `finder-package-info' is replaced by `package--builtins' and
3577 `finder-keywords-hash'.
3579 ** When generating autoloads, `update-directory-autoloads' no longer
3580 assumes every inspected file is in your `load-path'. It instead
3581 generates relative names according to the current `load-path'.
3584 * Lisp Changes in Emacs 24.1
3586 ** Code can now use lexical scoping by default instead of dynamic scoping.
3587 The `lexical-binding' variable enables lexical scoping for local
3588 variables. It is typically set via a file-local variable in the first
3589 line of the file, in which case it applies to all the code in that
3592 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3593 binding instead of the old dynamic binding mode.
3595 *** Lexically scoped interpreted functions are represented with a new form
3596 of function value which looks like (closure ENV ARGS &rest BODY).
3598 *** New macro `letrec' to define recursive local functions.
3600 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3601 So do `defcustom' and other forms that call `defvar' as a subroutine.
3603 *** New function `special-variable-p' to check whether a variable is
3604 declared as dynamically bound.
3606 *** The form ((lambda ...) ...) is deprecated.
3608 ** An Emacs Lisp testing tool is now included.
3609 Emacs Lisp developers can use this tool to write automated tests for
3610 their code. See the ERT info manual for details.
3612 ** Changes for bidirectional display and editing
3614 *** New function `current-bidi-paragraph-direction'.
3615 This returns the base direction of the paragraph at point.
3617 *** New function `bidi-string-mark-left-to-right'.
3618 Given a string containing characters from right-to-left scripts, this
3619 function returns another string which can be safely inserted into a
3620 buffer, such that any following text will be always displayed to the
3621 right of that string. (This works by appending an invisible Unicode
3622 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3624 This is useful when the buffer has overall left-to-right paragraph
3625 direction and you need to insert a string whose contents are not known
3626 in advance, without disrupting the layout of the line.
3630 *** Window tree functions are accessible in Elisp.
3631 Functions are provided to return the parent, siblings or child windows
3632 of any window including internal windows (windows not associated with a
3633 buffer) in the window tree.
3635 **** New function `window-valid-p' gives non-nil for live and internal
3638 **** Window manipulation can deal with internal windows.
3639 Many window handling functions like `split-window', `delete-window', or
3640 `delete-other-windows' as well as the window resizing functions can now
3641 act on any window including internal ones.
3643 *** window-total-height/-width vs window-body-height/-width.
3644 The function `window-height' has been renamed to `window-total-height'
3645 and `window-width' has been renamed to `window-body-width'. The old
3646 names are provided as aliases. Two new functions `window-total-width'
3647 and `window-body-height' are provided.
3649 *** Window parameters specific to window handling functions.
3650 For each window you can specify a parameter to override the default
3651 behavior of a number of functions like `split-window', `delete-window'
3652 and `delete-other-windows'. The variable `ignore-window-parameters'
3653 allows to ignore processing such parameters.
3655 *** New semantics of third argument of `split-window'.
3656 The third argument of `split-window' has been renamed to SIDE and can be
3657 set to any of the values 'below, 'right, 'above, or 'left to make the
3658 new window appear on the corresponding side of the window that shall be
3659 split. Any other value of SIDE will cause `split-window' to split the
3660 window into two side-by-side windows as before.
3662 *** Window resizing functions.
3663 A new standard function for resizing windows called `window-resize' has
3664 been introduced. This and all other functions for resizing windows no
3665 longer delete any windows when they become too small.
3667 *** Deleting the selected window now selects the most recently selected
3668 live window on that frame instead.
3670 *** `adjust-window-trailing-edge' adjustments.
3671 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3672 is able to resize other windows if a window adjacent to the trailing
3673 edge cannot be shrunk any more. This makes its behavior more similar to
3674 that of Emacs 21 without compromising, however, its inability to delete
3675 windows which was introduced in Emacs 22.
3677 *** Window-local buffer lists.
3678 Windows now have local buffer lists. This means that removing a buffer
3679 from display in a window will preferably show the buffer previously
3680 shown in that window with its previous window-start and window-point
3681 positions. This also means that the same buffer may be automatically
3682 shown twice even if it already appears in another window.
3684 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3685 which if non-nil requires the buffer to be displayed in the currently
3686 selected window, signaling an error otherwise. If nil, another window
3687 can be used, e.g. if the selected one is strongly dedicated.
3689 *** `split-window-vertically' and `split-window-horizontally' renamed
3690 to `split-window-below' and `split-window-right' respectively.
3691 The old names are kept as aliases.
3695 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3696 named ACTION, and takes a display action of the same form as
3697 `display-buffer-base-action' (see Changes, above). A non-nil,
3698 non-list value is treated specially, as the old meaning.
3700 **** New variable `display-buffer-overriding-action'.
3702 **** The procedure of `display-buffer' etc. to choose a window is
3703 determined by combining `display-buffer-overriding-action',
3704 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3705 and `display-buffer-fallback-action'. The second and fourth of these
3706 are user-customizable variables.
3708 See the docstring of `display-buffer' for details.
3710 *** New functions `window-state-get' and `window-state-put'.
3711 These functions allow to save and restore the state of an arbitrary
3712 frame or window as an Elisp object.
3716 *** New variable `completion-extra-properties' used to specify extra
3717 properties of the current completion:
3718 - :annotate-function, same as the old completion-annotate-function.
3719 - :exit-function, function to call after completion took place.
3721 *** Functions on `completion-at-point-functions' can return any of the
3722 properties valid for `completion-extra-properties'.
3724 *** `completion-annotate-function' is obsolete.
3726 *** New `metadata' method for completion tables. The metadata thus returned
3727 can specify various details of the data returned by `all-completions':
3728 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3729 used to select a style in completion-category-overrides.
3730 - `annotation-function' to add annotations in *Completions*.
3731 - `display-sort-function' to specify how to sort entries in *Completions*.
3732 - `cycle-sort-function' to specify how to sort entries when cycling.
3734 *** `minibuffer-local-filename-must-match-map' is not used any more.
3735 Instead, the bindings in `minibuffer-local-filename-completion-map'
3736 are combined with `minibuffer-local-must-match-map'.
3738 *** New variable `completing-read-function' allows overriding the
3739 behavior of `completing-read'.
3741 ** `glyphless-char-display' can now distinguish between graphical and
3742 text terminal display, via a char-table entry that is a cons cell.
3744 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3745 Instead, the offending function is removed.
3749 *** New function `run-hook-wrapped' for running an abnormal hook by
3750 passing the hook functions as arguments to a "wrapping" function.
3751 Like `run-hook-with-args-until-success', it stops at the first
3752 non-nil return value.
3754 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3755 set of "wrapping" filters, similar to around advice.
3756 (A version of this macro was actually added in Emacs 23.2 but was not
3757 advertised at the time.)
3761 *** New macro `condition-case-unless-debug' (this was actually added in
3762 Emacs 23.1 as condition-case-no-debug, but not advertised)
3764 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3766 *** Variable `stack-trace-on-error' removed.
3768 *** The debugger can now "continue" from an error, which means it will
3769 jump to the error handler as if the debugger had not been invoked
3770 instead of jumping all the way to the top-level.
3772 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3773 This can be useful when `inhibit-quit' is set.
3775 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3776 named Emacs server instances.
3778 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3779 to redirect STDOUT to a file.
3781 ** The function `format-time-string' now supports the %N directive,
3782 for higher-resolution time stamps.
3784 ** New input reading functions
3786 *** New function `read-char-choice' reads a restricted set of
3787 characters, discarding any inputs not inside the set.
3789 *** The command `read-color' now requires a match for a color name
3790 or RGB triplet, instead of signaling an error if the user provides
3793 **** `facemenu-read-color' is now an alias for `read-color'.
3795 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3796 The variable is now used to load all kind of supported dynamic libraries,
3797 not just image libraries. The previous name is still available as an
3800 ** Syntax parsing changes
3802 *** New variable `syntax-propertize-function'.
3803 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3804 This allows syntax-table properties to be set independently from font-lock:
3805 just call syntax-propertize to make sure the text is propertized.
3806 Together with this new variable come a new hook
3807 syntax-propertize-extend-region-functions, as well as two helper functions:
3808 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3809 as-is; and syntax-propertize-rules which provides a new way to specify
3812 *** Syntax tables support a new "comment style c" additionally to style b.
3814 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3816 ** frame-local variables cannot be let-bound any more.
3818 ** Major and minor mode changes
3820 *** `set-auto-mode' now respects mode: local variables at the end of files,
3821 as well as those in the -*- line.
3823 *** `prog-mode' is a new major mode from which programming modes
3826 **** `prog-mode-hook' can be used to enable features for programming
3827 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3828 on-the-fly spell checking for comments and strings.
3830 *** New hook `change-major-mode-after-body-hook', run by
3831 `run-mode-hooks' just before any other mode hooks.
3833 *** Enabled globalized minor modes can be disabled in specific major modes.
3834 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3835 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3837 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3839 ** File-handling changes
3841 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3842 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3843 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3844 argument is supplied (see Trash changes, above).
3846 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3848 ** Tool-bars can display separators.
3849 Tool-bar separators are handled like menu separators in menu-bar maps,
3850 i.e. via menu entries of the form `(menu-item "--")'.
3854 *** Animated images support (currently animated gifs only).
3856 **** `image-animated-p' returns non-nil if an image can be animated.
3858 **** `image-animate' animates a supplied image spec.
3860 **** `image-animate-timer' returns the timer object for an image that
3863 *** `image-extension-data' has been renamed to `image-metadata'.
3864 The old name is an obsolete alias to the new one.
3866 *** Image mode can view any image type that ImageMagick supports.
3867 This requires Emacs to be built with ImageMagick support.
3869 **** New function `imagemagick-types', defined if ImageMagick support
3870 is enabled, returns a list of image file extensions that your
3871 ImageMagick installation supports.
3873 **** New function `imagemagick-register-types' enables ImageMagick
3874 image types in Image mode and in `create-image' and other helper
3877 **** New option `imagemagick-types-inhibit' excludes certain
3878 ImageMagick image types from `imagemagick-register-types'.
3880 **** With ImageMagick support, there are extra Image mode commands to
3881 resize and rotate images: `image-transform-fit-to-height',
3882 `image-transform-fit-to-width', `image-transform-set-rotation', and
3883 `image-transform-set-scale'.
3885 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3886 passes it to the mail user agent function. This argument specifies an
3887 action for returning to the caller after finishing with the mail. For
3888 example, this is used by Rmail to optionally delete a mail window.
3890 ** XML and HTML parsing
3891 If Emacs is compiled with libxml2 support, there are two new
3892 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3893 and `libxml-parse-xml-region' (which parses XML). Both return an
3894 Emacs Lisp parse tree.
3896 ** Networking and encryption changes
3898 *** `open-network-stream' can now be used to open an encrypted stream.
3899 It now accepts an optional `:type' parameter for initiating a TLS
3900 connection, directly or via STARTTLS. To do STARTTLS, additional
3901 parameters (`:end-of-command', `:success', `:capabilities-command')
3902 must also be supplied.
3904 *** New library gnutls.el.
3905 The new function `gnutls-available-p' returns non-nil if Emacs is
3906 built with GnuTLS support. The main entry points are
3907 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3908 these functions through `open-network-stream', because that can
3909 upgrade connections through STARTTLS opportunistically or use plain
3910 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3913 *** New primitive `secure-hash' that supports many secure hash algorithms:
3914 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3915 sha1.el has been removed. The `sha1' feature is provided by default.
3919 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3921 ** Progress reporters can now "spin".
3922 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3923 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3924 time you call `progress-reporter-update' on that progress reporter,
3925 with a nil or omitted VALUE argument, the reporter message is
3926 displayed with a "spinning bar".
3928 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3929 being reverted, even if the buffer has a local `revert-buffer-function'.
3931 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3932 If delayed-warnings-list is non-nil, the command loop calls
3933 `delayed-warnings-hook' after `post-command-hook'. At present, this
3934 is only used by Emacs on some platforms to display warnings during
3935 startup, which might otherwise not be noticed. This uses the
3936 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3938 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3940 ** New function `make-composed-keymap' that constructs a new keymap
3941 from multiple input maps. You can use this to make a keymap that
3942 inherits from multiple maps, eg:
3943 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3945 ** New function `string-prefix-p'.
3946 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3948 ** New reader macro ## that stands for the empty symbol.
3949 This means that the empty symbol can now be read back. Also, #: by itself
3950 (when not immediately followed by a possible symbol character) stands for
3951 an empty uninterned symbol.
3953 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3955 ** The following functions and variables are obsolete:
3957 *** `tooltip-use-echo-area' is obsolete.
3958 Rather than setting this to t, disable Tooltip mode instead.
3960 *** buffer-substring-filters is obsolete.
3961 Use `filter-buffer-substring-functions' instead.
3963 *** `byte-compile-disable-print-circle' is obsolete.
3965 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3966 Use `post-command-hook' instead.
3968 *** `font-lock-maximum-size' is obsolete.
3971 * Changes in Emacs 24.1 on Non-Free Operating Systems
3973 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3974 and also when HOME is set to C:\ by default.
3976 ** New configure.bat options
3978 *** --enable-checking builds Emacs with extra runtime checks.
3980 *** --distfiles specifies files to be included in binary distribution.
3982 *** --without-gnutls disables automatic GnuTLS detection.
3984 *** --lib for general library linkage, works with the USER_LIBS build variable.
3986 ** New make target `dist' to create binary distribution for MS Windows.
3988 ** The Lisp function `w32-default-color-map' is now obsolete.
3989 (It is only used internally in the Emacs C code.)
3991 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3992 reappear on mouse-over. (Requires OS X 10.6 or later.)
3994 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3995 other platforms, rather than inserting its contents into the buffer.
3998 ----------------------------------------------------------------------
3999 This file is part of GNU Emacs.
4001 GNU Emacs is free software: you can redistribute it and/or modify
4002 it under the terms of the GNU General Public License as published by
4003 the Free Software Foundation, either version 3 of the License, or
4004 (at your option) any later version.
4006 GNU Emacs is distributed in the hope that it will be useful,
4007 but WITHOUT ANY WARRANTY; without even the implied warranty of
4008 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4009 GNU General Public License for more details.
4011 You should have received a copy of the GNU General Public License
4012 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
4017 paragraph-separate: "[
\f]*$"