1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
32 ** Emacs can now be compiled with file notification support.
33 This happens by default if a suitable system library is found at
34 build time. To prevent this, use the configure option
35 `--without-file-notification'. See below for file-notify features.
36 FIXME? This feature is not available for the Nextstep port. (?)
39 ** The configure option `--without-compress-info' has been generalized,
40 and renamed to `--without-compress-install'. It now prevents compression
41 of _any_ files during installation.
44 ** The configure option `--with-crt-dir' has been removed.
45 It is no longer needed, as the crt*.o files are no longer linked specially.
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as if they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
162 *** The command `describe-function' has been extended for EIEIO.
163 Running it on constructors will show a full description of the
164 generated class. For generic functions, it will show all
165 implementations together with links to the source. The old commands
166 `describe-class', `describe-constructor' and `describe-generic' were
170 *** The function `quail-help' is no longer an interactive command.
171 Use `C-h C-\' (`describe-input-method') instead.
176 *** ImageMagick images now support the :max-width and :max-height keywords.
179 *** When using `create-image' with image data, you can pass a :format
180 attribute (via the property-list argument) in order to help
181 ImageMagick detect the image type. The value should be a MIME
182 content-type that is found in the new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
190 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
191 `frame-configuration-to-register'. It offers similar functionality,
192 plus enhancements like the ability to restore deleted frames. The
193 command `frame-configuration-to-register' still exists, but is unbound.
196 *** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 *** Emacs can now draw dividers between adjacent windows. To put
201 dividers between side-by-side windows customize the frame parameter
202 right-divider-width to some positive integer. To put dividers between
203 vertically stacked windows set the frame parameter bottom-divider-width
204 to some positive integer. Dividers can be dragged with the mouse and
205 show a corresponding cursor when the mouse hovers over them. The
206 appearance of dividers can be changed by customizing the basic faces
207 window-divider, window-divider-first-pixel and window-divider-last-pixel
208 where the latter two are useful to provide a 3D effect or to better set
209 dividers apart from surrounding display objects.
212 *** `split-window' is now a non-interactive function, not a command.
213 As a command, it was a special case of `C-x 2' (`split-window-below'),
214 and as such superfluous. After being reimplemented in Lisp, its
215 interactive form was mistakenly retained.
218 *** New option `scroll-bar-adjust-thumb-portion'.
219 Available only on X, this option allows to control over-scrolling
220 using the scroll bar (i.e. dragging the thumb down even when the end
221 of the buffer is visible).
223 ** Lisp evaluation changes
225 *** `eval-defun' on an already defined defcustom calls the :set function,
229 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
230 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
231 zero prefix argument. This disables truncation of lists in the output,
232 equivalent to setting `(eval-expression-)print-length' and
233 `(eval-expression-)print-level' to nil. Additionally, it causes integers
234 to be printed in other formats (octal, hexadecimal, and character).
236 *** New hook `eval-expression-minibuffer-setup-hook' run by
237 `eval-expression' on entering the minibuffer.
240 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
243 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
244 because it affects caching of paragraph scanning results as well.
245 There is no reason to set this to nil except for debugging purposes.
248 ** The option `set-mark-default-inactive' has been deleted.
249 This unfinished feature was introduced by accident in Emacs 23.1;
250 simply disabling Transient Mark mode does the same thing.
252 ** The default value of `comment-use-global-state' is now t,
253 and this variable has been marked obsolete.
256 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
257 and works for git too, if you fetch the repository notes.
259 ** `read-regexp-defaults-function' defines a function to provide default
260 values for reading regexps by commands like `rgrep', `lgrep' `occur',
261 `highlight-regexp', etc. You can customize this to specify a function
262 that provides a default value from the regexp last history element,
263 or from the symbol found at point.
266 ** New option `load-prefer-newer' affects how the `load' function chooses
267 the file to load. If this is non-nil, then when both .el and .elc
268 versions of a file exist, and the caller did not explicitly specify
269 which one to load, then the newer file is loaded. The default, nil,
270 means to always load the .elc file.
273 * Editing Changes in Emacs 24.4
275 ** Indentation changes
278 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
279 When invoked without a prefix argument, it now activates a transient
280 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
281 the text indentation in the region. Typing any other key resumes
282 normal editing behavior.
284 *** `electric-indent-mode' is enabled by default.
287 *** `tab-stop-list' is now implicitly extended to infinity by repeating
288 the last step. Its default value is changed to nil, which means a tab
289 stop every `tab-width' columns.
292 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
293 When called in succession, it cycles between spacing conventions:
294 one space, no spaces, original spacing.
297 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
298 a line after a one-letter word, which is an error in some typographical
299 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
302 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
304 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
305 Most commands are still unaware of it, but kill/yank do work on the rectangle.
308 ** New option `visual-order-cursor-movement'.
309 If this is non-nil, cursor motion with arrow keys will follow the
310 visual order of characters on the screen: <left> always moves to the
311 left, <right> always moves to the right, disregarding the surrounding
312 bidirectional context.
317 *** All interactive commands that read a register (`copy-to-register', etc.)
318 now display a temporary window after `register-preview-delay' seconds
319 that summarizes existing registers. To disable this, set that option to nil.
320 Interactive commands that read registers and want to make use of this
321 should use `register-read-with-preview' to read register names.
324 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
327 *** New command `C-x r f' (`frameset-to-register').
328 See Changes in Emacs 24.4, above.
331 ** New command `delete-duplicate-lines'.
332 This searches the region for identical lines, and removes all but one
333 copy of each repeated line. The lines need not be sorted.
336 * Changes in Specialized Modes and Packages in Emacs 24.4
339 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
341 ~/.emacs.d/timelog replaces ~/.timelog
342 ~/.emacs.d/vip replaces ~/.vip
343 ~/.emacs.d/viper replaces ~/.viper
344 ~/.emacs.d/ido.last replaces ~/.ido.last
345 ~/.emacs.d/kkcrc replaces ~/.kkcrc
346 ~/.emacs.d/quickurls replaces ~/.quickurls
347 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
348 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
349 ~/.emacs.d/places replaces ~/.emacs-places
350 ~/.emacs.d/shadows replaces ~/.shadows
351 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
352 ~/.emacs.d/strokes replaces ~/.strokes
353 ~/.emacs.d/notes replaces ~/.notes
354 ~/.emacs.d/type-break replaces ~/.type-break
355 Also the following files used by the now obsolete otodo-mode.el:
356 ~/.emacs.d/todo-do replaces ~/.todo-do
357 ~/.emacs.d/todo-done replaces ~/.todo-done
358 ~/.emacs.d/todo-top replaces ~/.todo-top
360 ** Backtrace and debugger
362 *** The Lisp debugger's `e' command now includes the lexical environment
363 when evaluating the code in the context at point. Hence, it now lets
364 you access lexical variables.
367 *** New command `v' (`debugger-toggle-locals') displays local vars.
369 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
370 code run via JIT Lock.
373 ** Battery information can now be retrieved from BSD's `apm' utility.
376 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
378 ** Calendar and Diary
381 *** New faces `calendar-weekday-header', `calendar-weekend-header',
382 and `calendar-month-header'.
385 *** New option `calendar-day-header-array'.
388 *** New variable `diary-from-outlook-function', used by the command
389 `diary-from-outlook'.
392 *** The variable `calendar-font-lock-keywords' is obsolete.
397 *** Calc by default now uses the Gregorian calendar for all dates, and
398 uses January 1, 1 AD as its day number 1. Previously Calc used the
399 Julian calendar for dates before September 14, 1752, and it used
400 December 31, 1 BC as its day number 1; the new scheme is more
401 consistent with Calendar's calendrical system and day numbering.
404 *** The new option `calc-gregorian-switch' lets you configure if
405 (and when) Calc switches from the Julian to the Gregorian calendar.
408 *** Support for ISO 8601 dates.
414 **** The cpp-root project now supports executing a compile command.
415 It can be set through the new :compile-command slot or the
416 buffer-local variable `compile-command'.
418 **** Better selection of include directories for the 'linux' project.
419 Include directories now support out-of-tree build directories and
420 target architecture auto-detection.
424 **** Improved detection of used namespaces in current scope in C++.
426 **** Parsing of default values for variables and function arguments in C/C++.
427 They are also displayed by the summarize feature in the mode line.
429 **** Improved parsing of function pointers in C/C++.
430 This also includes parsing of function pointers as function arguments.
432 **** Parsing of C/C++ preprocessor macros that open new scope.
433 For example, this enables parsing of macros that open new namespaces.
435 **** Support for 'this' pointer in inline member functions in C++.
440 *** New macro `cl-tagbody'.
441 This executes statements while allowing for control transfer to labels.
444 *** letf is now just an alias for cl-letf.
448 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
449 Hence, you can now enable it independently from those modes, and from
450 `transient-mark-mode'.
453 *** `cua-highlight-region-shift-only' is now obsolete.
454 You can disable `transient-mark-mode' to get the same result.
456 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
461 *** Support for completion, ElDoc, and Flycheck has been added.
464 *** The current CFEngine syntax is parsed from "cf-promises -s json".
465 There is a fallback syntax available if you don't have cf-promises or
466 if your version doesn't support that option. See option `cfengine-cf-promises'.
469 ** Delete Selection mode can now be used without Transient Mark mode.
473 *** `desktop-auto-save-timeout' defines the number of seconds idle time
474 before auto-save of the desktop.
476 *** `desktop-restore-frames', enabled by default, allows saving and
477 restoring the frame/window configuration (frameset). Additional options
478 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
479 and `desktop-restore-forces-onscreen' offer further customization.
482 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
483 such as file ownership or permissions, are visible.
486 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
487 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
488 The results display in the mode line.
490 ** Electric Pair mode
492 *** New option `electric-pair-preserve-balance', enabled by default.
493 If non-nil, pairing/skipping only kicks in when that help the balance
494 of parentheses and quotes, i.e. the buffer should end up at least as
497 You can further control this behavior by adjusting the predicates
498 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
500 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
501 In `electric-pair-mode', the commands `backward-delete-char' and
502 `backward-delete-char-untabify' are now bound to electric variants
503 that delete the closer when invoked between adjacent pairs.
505 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
506 In `electric-pair-mode', inserting a newline between adjacent pairs
507 opens an extra newline after point, which is indented if
508 `electric-indent-mode' is also set.
510 *** New option `electric-pair-skip-whitespace', enabled by default.
511 This controls if skipping over closing delimiters should jump over any
512 whitespace slack. Setting it to `chomp' makes it delete this
513 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
515 *** New variables control the pairing in strings and comments.
516 You can customize `electric-pair-text-pairs' and
517 `electric-pair-text-syntax-table' to tweak pairing behavior inside
518 strings and comments.
521 ** New EPA option `epa-mail-aliases'.
522 You can set this to a list of email address aliases that `epa-mail-encrypt'
523 should use to find keys.
526 ** New ERC option `erc-accidental-paste-threshold-seconds'.
527 If set to a number, this can be used to avoid accidentally pasting large
528 amounts of data into the ERC input.
531 ** New ERT macro `skip-unless' allows skipping ERT tests.
532 See the ERT manual for details.
537 *** `eshell' now supports visual subcommands and options.
538 Eshell has been able to handle "visual" commands (interactive,
539 non-line oriented commands such as top that require display
540 capabilities not provided by eshell) by running them in an Emacs
541 terminal emulator. See `eshell-visual-commands'.
543 This feature has been extended to subcommands and options that make a
544 usually line-oriented command a visual command. Typical examples are
545 "git log" and "git <command> --help", which display their output in a
546 pager by default. See `eshell-visual-subcommands' and
547 `eshell-visual-options'.
550 *** New Eshell-Tramp module.
551 External su and sudo commands are now the default; the internal,
552 Tramp-using variants can still be used by enabling the eshell-tramp
556 ** New F90 mode option `f90-smart-end-names'.
558 ** Icomplete is a bit more like Ido.
560 *** Key bindings to navigate through and select the completions.
562 *** The icomplete-separator is customizable, and its default has changed.
564 *** Removed `icomplete-show-key-bindings'.
566 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
567 (setq icomplete-with-completion-tables '(internal-complete-buffer))
568 will revert to the old behavior.
573 *** An Ido user manual is now included.
576 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
577 This means to use virtual buffers if the current ido input does not match
581 *** The variable `ido-decorations' can optionally have two new elements,
582 which are the brackets to use around the sole remaining completion.
587 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
588 visit the next image file and the previous image file in the same
589 directory, respectively.
592 *** New commands to show specific frames of multi-frame images.
593 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
594 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
597 *** New commands to speed up, slow down, or reverse animation.
598 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
599 speed up and slow down the animation. `a r' (`image-reverse-speed')
600 to reverse it and `a 0' (`image-reset-speed') to reset it.
603 *** The command `image-mode-fit-frame' deletes other windows.
604 When toggling, it restores the frame's previous window configuration.
605 It also has an optional frame argument, which can be used by Lisp
606 callers to fit the image to a frame other than the selected frame.
611 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
612 the symbol found near point.
615 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
616 will cycle through faces in `hi-lock-face-defaults' without prompting.
618 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
623 *** New Info face `info-index-match', used to highlight matches in index
624 entries displayed by `Info-index-next', `Info-virtual-index' and
628 *** The Info-edit command is obsolete. Editing Info nodes by hand
629 has not been relevant for some time.
634 *** New option `js-switch-indent-offset'.
637 *** Better indentation of multiple-variable declarations.
638 If a declaration spans several lines, variables on the following lines
639 are lined up to the first one.
642 *** Recognition and better indentation of continuations in array comprehensions.
645 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
650 *** Font locking for texinfo comments and new keywords.
652 *** Completion in Octave file buffers.
656 *** Jump to definition.
658 *** Documentation lookup/search.
661 ** OPascal mode is the new name for Delphi mode
664 *** All delphi-* variables and functions have been renamed to opascal-*.
665 Obsolete aliases exist for those likely to have been used externally.
668 *** The option `delphi-newline-always-indents' has been removed.
669 Use `electric-indent-mode' instead.
672 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
676 *** The format of `archive-contents' files, generated by package
677 repositories, has changed to allow a new (fifth) element in the data
678 vectors, containing an associative list with extra properties.
680 *** `describe-package' buffer uses the `:url' extra property to
681 display a `Homepage' header, if it's present.
683 *** In the buffer produced by `describe-package', there are now buttons
684 listing the keywords related to that package. You can click on them
685 to see other packages related to any given keyword.
687 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
688 the packages by a keyword.
691 ** In Prolog mode, `prolog-use-smie' has been removed,
692 along with the non-SMIE indentation code.
696 *** The new command `remember-notes' creates a buffer that is saved on
697 `kill-emacs'. You can think of it as a *scratch* buffer whose content
698 is preserved. In fact, it was designed as a replacement for *scratch*
699 buffer and can be used that way by setting `initial-buffer-choice' to
700 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
701 Without the second change, the *scratch* buffer will still be there
702 for notes that do not need to be preserved.
704 *** The Remember package can now store notes in separates files.
705 You can use the new function `remember-store-in-files' within the
706 `remember-handler-functions' option. See `remember-data-directory'
707 and `remember-directory-file-name-format' for new options related to
712 *** Customize `rmail-mbox-format' to influence some minor aspects of
713 how Rmail displays non-MIME messages.
716 *** The `unrmail' command now converts from BABYL to mboxrd format,
717 rather than mboxo. Customize `unrmail-mbox-format' to change this.
722 *** Improved syntax highlighting and indentation.
725 *** New `electric-indent-mode' integration.
728 *** New option `ruby-encoding-magic-comment-style'.
731 *** New option `ruby-custom-encoding-magic-comment-template'.
734 *** New option `ruby-align-to-stmt-keywords'.
737 *** New option `ruby-align-chained-calls'.
740 *** More Ruby file types have been added to `auto-mode-alist'.
742 ** Search and Replace
745 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
746 starts a symbol (identifier) incremental search forward with the
747 symbol found near point added to the search string initially.
750 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
751 and adds it to the search string.
753 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
754 between nil and the value of the option `search-invisible' (or `open'
757 *** `query-replace' skips invisible text when `search-invisible' is nil,
758 and opens overlays with hidden text when `search-invisible' is `open'.
761 *** A negative prefix arg of replacement commands replaces backward.
762 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
763 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
766 *** By default, prefix arguments do not now terminate Isearch mode.
767 Set `isearch-allow-prefix' to nil to restore old behavior.
770 *** More Isearch commands accept prefix arguments, namely
771 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
775 *** Word search now matches whitespace at the beginning/end
776 of the search string if it contains leading/trailing whitespace.
777 In an incremental word search or when using a non-nil LAX argument
778 of `word-search-regexp', the lax matching can also match part of
779 the first word (in addition to the lax matching of the last word).
780 The same rules are now applied to the symbol search with the difference
781 that it matches symbols, and non-symbol characters between symbols.
784 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
787 ** The shell.el option `explicit-bash-args' includes --noediting by default.
788 All non-ancient Bash versions support this option.
793 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
796 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
798 ** SMIE indentation can be customized via `smie-config'.
799 Emacs can learn the appropriate indentation settings if you provide it
800 with an indented sample file.
803 ** New Term mode option `term-suppress-hard-newline'.
806 ** Todo mode has been rewritten and enhanced.
807 The Todo mode user manual describes all commands and most user
808 options. To support some of these features, a new file format is
809 used, which is incompatible with the old format; however, you can
810 convert old todo and done item files to the new format on initializing
811 the first new todo file, or at any later time with the provided
812 conversion command. The previous version of todo-mode.el has been
813 renamed to otodo-mode.el and is now obsolete. New features include:
815 *** Support for multiple todo files and archive files of done items.
817 *** Renaming, reordering, moving, merging, and deleting categories.
819 *** Sortable tabular summaries of categories and the item types they contain.
821 *** Cross-category lists of items filtered by specific criteria.
823 *** More fine-grained interaction with the Emacs diary, by being able to
824 decide for each todo item whether it appears in the Fancy Diary display.
826 *** Highly flexible new item insertion and item editing.
828 *** Moving items between categories, storing done items in their category
829 or in archive files, undoing or unarchiving done items.
831 *** Reprioritizing items by inputting a numerical priority.
833 *** Extensive customizability of operation and display, including many faces.
838 *** `trace-function' and `trace-function-background' no longer prompt for
839 the output buffer. Unless you use a prefix argument, they output to
843 *** With a prefix argument, `trace-function' and `trace-function-background'
844 will prompt for a "context". This is a Lisp expression, whose value at the
845 time the function is entered/exited is printed along with the function's
851 *** The experimental url syntax for remote file names has been removed.
854 *** New connection method "adb", which allows to access Android
855 devices by the Android Debug Bridge. The variable `tramp-adb-program'
856 can be used to adapt the path of the "adb" program, if needed.
859 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
860 "scpc" and "rsyncc" are discontinued. The ssh option
861 "ControlMaster=auto" is set automatically in all ssh-based methods,
862 when possible. See `tramp-use-ssh-controlmaster-options'.
865 *** Handlers for `file-acl' and `set-file-acl' for remote machines
866 which support POSIX ACLs.
869 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
870 for remote machines which support filesystem notifications.
873 ** New URL command `url-cookie-list' displays the current cookies,
874 and allows you to interactively remove cookies.
876 ** VC and related modes
879 *** In VC directory mode, `D' displays diffs between VC-controlled
880 whole tree revisions.
883 *** In VC directory mode, `L' lists the change log for the current VC
884 controlled tree in a window.
887 *** In VC directory mode, `I' shows a log of changes that will be
888 received with a pull operation.
891 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
892 under current version control system. When called with a prefix
893 argument, you can remove a file from the ignored file list.
898 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
901 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
904 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
905 are obsolete. Customize the `woman-*' faces instead.
910 *** iswitchb.el; use icomplete-mode.
913 *** longlines.el; use visual-line-mode.
922 *** terminal.el; use term.el instead.
925 *** the old version of todo-mode.el (renamed to otodo-mode.el).
928 *** xesam.el (owing to the cancellation of the XESAM project).
931 *** yow.el; use fortune.el or cookie1.el instead.
934 * New Modes and Packages in Emacs 24.4
937 ** New package `eww' is a built-in web browser.
938 It is only available if Emacs is compiled with libxml2 support.
940 ** New minor mode `superword-mode'.
941 This overrides the default word motion commands to treat "symbol_words"
942 as a single word, similar to what `subword-mode' does.
945 ** New package nadvice.el offers lighter-weight advice facilities.
948 *** add-function/remove-function, which can be used to add/remove code on any
949 function-carrying place, such as process-filters or `<foo>-function' hooks.
951 *** advice-add/advice-remove to add/remove a piece of advice on a named
952 function, much like `defadvice' does.
954 ** New package frameset.el.
955 It provides a set of operations to save a frameset (the state of all
956 or a subset of the existing frames and windows, somewhat similar to a
957 frame configuration), both in-session and persistently, and restore it
958 at some point in the future.
961 ** New package filenotify.el provides an interface for file system
962 notifications. It requires that Emacs be compiled with one of the
963 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
966 * Incompatible Lisp Changes in Emacs 24.4
969 ** `kill-region' has lost its `yank-handler' optional argument.
972 ** `(input-pending-p)' no longer runs other timers that are ready to run.
973 The new optional CHECK-TIMERS parameter allows for the prior behavior.
976 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
979 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
980 Some languages match those as »...«, and others as «...», so it is
981 better for Emacs to stay neutral by default.
984 ** In compiled Lisp files, the header no longer includes a timestamp.
987 ** The default file coding for Emacs Lisp files is now utf-8.
988 (See `file-coding-system-alist'.) In most cases, this change is
989 transparent, but files that contain unusual characters without
990 specifying an explicit coding system may fail to load with obscure
991 errors. You should either convert them to utf-8 or add an explicit
995 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
996 It used to disable the minor mode, major mode, and text-property keymaps,
997 whereas now it simply has higher precedence.
999 ** Default process filters and sentinels are not nil any more.
1000 Instead they default to a function that does what the nil value used to do.
1003 ** `read-event' does not return decoded chars in ttys any more.
1004 As was the case in Emacs 22 and before, the decoding of terminal
1005 input, according to `keyboard-coding-system', is not performed in
1006 `read-event' any more. But unlike in Emacs 22, this decoding is still
1007 done before input-decode-map, function-key-map, etc.
1010 ** The option `inhibit-local-menu-bar-menus' has been removed.
1013 ** Frame-local variables that affect redisplay do not work any more.
1014 More specifically, redisplay does not bother to check for a frame-local
1015 value when looking up variables.
1018 ** nil and "unbound" are indistinguishable in `symbol-function'.
1019 `symbol-function' does not signal a `void-function' error any more.
1020 To determine if a symbol's function definition is void, use `fboundp'.
1023 ** `defadvice' does not honor the `freeze' flag and cannot advise
1024 special-forms any more.
1027 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1028 when lexical binding is enabled. Previously, VAR was bound to nil,
1029 which often led to spurious unused-variable warnings.
1032 ** The return value of `backup-buffer' has changed.
1033 The second argument is no longer an SELinux context, instead it is an
1034 alist of extended attributes as returned by the new function
1035 `file-extended-attributes'. The attributes can be applied to another
1036 file using `set-file-extended-attributes'.
1039 ** By default `copy-file' no longer copies file permission bits to an
1040 existing destination; and it sets the file permission bits of a newly
1041 created destination to those of the source, masked by the default file
1042 permissions. To copy the file permission bits, pass t as the
1043 PRESERVE-PERMISSIONS argument of `copy-file'.
1046 ** `visited-file-modtime' now returns -1 for nonexistent files.
1047 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1048 in the presence of files with negative time stamps.
1051 ** The cars of the elements in `interpreter-mode-alist' are now
1052 treated as regexps rather than literal strings.
1055 * Lisp Changes in Emacs 24.4
1058 ** The second argument of `eval' can now specify a lexical environment.
1061 ** New functions `special-form-p' and `macrop'.
1063 ** New macro `define-alternatives' can be used to define generic commands.
1064 Generic commands are interactive functions whose implementation can be
1065 selected among several alternatives, as a matter of user preference.
1067 ** The `defalias-fset-function' property lets you catch `defalias'
1068 calls, and redirect them to your own function, instead of `fset'.
1071 ** New variable `enable-dir-local-variables'.
1072 Directory-local variables are ignored if this is nil. This may be
1073 useful for modes that want to ignore directory-locals while still
1074 respecting file-local variables.
1077 ** New function `get-pos-property'.
1079 ** Completion changes
1081 *** The separator for `completing-read-multiple' can now be a regexp.
1082 The default separator has been changed to allow surrounding spaces
1085 *** The `common-substring' arg of `display-completion-list' is obsolete.
1086 Either use `completion-all-completions', which returns highlighted
1087 strings (including for partial or substring completion), or call
1088 `completion-hilit-commonality' to add the highlight.
1090 *** New function `completion-table-with-cache' is a wrapper for
1091 `completion-table-dynamic' that caches the result of the last lookup.
1093 *** New function `completion-table-merge' to combine several
1094 completion tables by merging their completions.
1096 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1097 let you enable symbol prettification (replacing a string like "lambda" with
1098 the Greek lambda character).
1103 *** Functions to pop up menus and dialogs now work on all terminals,
1104 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1105 `message-box', `yes-or-no-p', etc.
1107 The function `display-popup-menus-p' will now return non-nil for a
1108 display or frame whenever a mouse is supported on that display or
1111 *** New hook `tty-setup-hook'.
1115 *** New display action function `display-buffer-no-window' to not
1116 display the buffer in a window.
1118 *** New display action alist entry `allow-no-window' to indicate the
1119 caller of `display-buffer' is ready to handle the case of not
1120 displaying the buffer in a window.
1122 ** New hook `pre-redisplay-function'.
1125 ** New bool-vector set operation functions
1126 *** `bool-vector-exclusive-or'
1127 *** `bool-vector-union'
1128 *** `bool-vector-intersection'
1129 *** `bool-vector-set-difference'
1130 *** `bool-vector-not'
1131 *** `bool-vector-subsetp'
1132 *** `bool-vector-count-consecutive'
1133 *** `bool-vector-count-population'
1136 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1138 ** Error-handling changes
1141 *** New function `define-error'.
1144 *** `with-demoted-errors' takes an additional argument `format'.
1147 ** New macro `with-eval-after-load'.
1148 This is like the old `eval-after-load', but better behaved.
1151 ** New library subr-x.el with miscellaneous small utility functions
1152 *** `hash-table-keys'
1153 *** `hash-table-values'
1154 *** `string-blank-p'
1155 *** `string-empty-p'
1157 *** `string-reverse'
1158 *** `string-trim-left'
1159 *** `string-trim-right'
1161 *** `string-remove-prefix'
1162 *** `string-remove-suffix'
1165 ** Obsoleted functions
1168 *** `lisp-complete-symbol'
1169 *** `field-complete'
1170 *** `minibuffer-completion-contents'
1171 *** `isearch-nonincremental-exit-minibuffer'
1172 *** `isearch-filter-visible'
1173 *** `generic-make-keywords-list'
1174 *** `get-upcase-table' (use `case-table-get-table' instead).
1176 ** `with-wrapper-hook' is obsoleted by `add-function'.
1177 The few hooks that used with-wrapper-hook are replaced as follows:
1178 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1179 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1180 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1183 ** `byte-compile-interactive-only-functions' is now obsolete.
1184 To specify that a command should only be called interactively, give it
1185 a non-nil `interactive-only' property.
1188 ** `split-string' now takes an optional argument TRIM.
1189 The value, if non-nil, is a regexp that specifies what to trim from
1190 the start and end of each substring.
1193 ** New function `string-suffix-p'.
1195 ** File-handling changes
1198 *** Support for filesystem notifications.
1199 Emacs now supports notifications of filesystem changes, such as
1200 creation, modification, and deletion of files. This requires the
1201 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1202 MS-Windows systems, this is supported for Windows XP and newer
1206 *** The 9th element returned by `file-attributes' is now unspecified.
1207 Formerly, it was t if the file's gid would change if file were deleted
1208 and recreated. This value has been inaccurate for years on many
1209 platforms, and nobody seems to have noticed or cared.
1212 *** The 6th argument to `copy-file' has been renamed to
1213 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1214 Unix file permission bits as well as SELinux context.
1217 *** The function `file-ownership-preserved-p' now has an optional
1218 argument GROUP which causes it check for file group too. This can be
1219 used in place of the 9th element of `file-attributes'.
1222 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1223 argument, with the same interpretation as the returned value of
1224 `visited-file-modtime'.
1226 ** Autorevert changes
1229 *** If Emacs is compiled with file notification support, notifications
1230 are used instead of checking the time stamp of the files. You can
1231 disable this by setting the user option `auto-revert-use-notify' to
1232 nil. Alternatively, a regular expression of directories to be
1233 excluded from file notifications can be specified by
1234 `auto-revert-notify-exclude-dir-regexp'.
1237 *** The new user option `auto-revert-remote-files' enables reversion
1238 of remote files when set to non-nil.
1242 *** The function `face-spec-set' is now like `setq' for face specs.
1243 Its third arg now accepts values specifying a face spec type (defface,
1244 custom, or override spec), and the relevant spec is set accordingly.
1247 *** New function `add-face-text-property', which can be used to
1248 conveniently prepend/append new face properties.
1250 *** Face specs set via Custom themes now replace the `defface' spec
1251 rather than inheriting from it (as do face specs set via Customize).
1253 *** New face characteristic (supports :underline (:style wave))
1254 specifies whether or not the terminal can display a wavy line.
1257 *** New face spec attribute :distant-foreground
1258 specifies foreground to use if background color is near the foreground
1259 color that would otherwise have been used.
1264 *** `image-animated-p' is now `image-multi-frame-p'.
1265 It returns non-nil for any image that contains multiple frames,
1266 whether or not it specifies a frame delay.
1269 *** New variable `image-default-frame-delay' gives the frame delay for
1270 animated images which do not specify a frame delay.
1273 *** New functions `image-current-frame' and `image-show-frame' for getting
1274 and setting the current frame of a multi-frame image.
1279 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1280 **** object-name -> eieio-object-name
1281 **** object-class -> eieio-object-class
1282 **** object-class-fast -> eieio--object-class
1283 **** object-class-name -> eieio-object-class-name
1284 **** object-name-string -> eieio-object-name-string
1285 **** object-num-slots -> eieio--object-num-slots
1286 **** object-set-name-string -> eieio-object-set-name-string
1287 **** class-of -> eieio-object-class
1288 **** class-name -> eieio-class-name
1289 **** class-parent -> eieio-class-parent
1290 **** class-parents -> eieio-class-parents
1291 **** class-parents-fast -> eieio-class-parents-fast
1292 **** class-children -> eieio-class-children
1293 **** class-num-slots -> eieio--class-num-slots
1294 **** class-precedence-list -> eieio-class-precedence-list
1295 **** class-direct-subclasses -> eieio-class-children
1296 **** class-direct-superclasses -> eieio-class-parents
1298 ** Changes in encoding and decoding of text
1301 *** New coding-system `prefer-utf-8'.
1302 This is like `undecided' but prefers UTF-8 on decoding if the text to
1303 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1304 any non-ASCII characters are automatically encoded as UTF-8.
1307 *** New attributes of coding-systems whose type is `undecided'.
1308 Two new attributes, `:inhibit-null-byte-detection' and
1309 `:inhibit-iso-escape-detection', determine how to detect encoding of
1310 text that includes null bytes and ISO-2022 escape sequences,
1311 respectively. Each of these attributes can be either nil, zero, or
1312 t. If it is t, decoding text ignores null bytes and, respectively,
1313 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1314 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1315 text is encoded in one of the ISO-2022 encodings, such as
1316 iso-2022-7bit. If the value is zero, Emacs consults the variables
1317 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1319 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1320 UTF-8 encoding and decoding, whenever possible.
1322 These attributes are only meaningful for coding-systems of type
1323 `undecided'. (The type of a coding-system is determined by its
1324 `:coding-type' attribute and can be accessed by calling the
1325 `coding-system-type' function.)
1328 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1331 ** New functions `group-gid' and `group-real-gid'.
1334 ** The spelling of the rx.el category `chinese-two-byte' has been
1335 corrected (the first 'e' was missing).
1338 ** Minor internal changes to the details of lock files.
1339 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1340 If DIR/.#FILE already exists and is not an Emacs lock file,
1341 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1342 numbered lock files DIR/.#FILE.0...).
1343 On file systems that do not support symbolic links, the lock is now a
1344 regular file with contents being what would have been in the symlink.
1346 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1349 *** The package descriptor and name of global variables, constants,
1350 and functions should be separated by two hyphens if the symbol is not
1351 meant to be used by other packages.
1354 * Changes in Emacs 24.4 on Non-Free Operating Systems
1357 ** The procedure for building Emacs on MS-Windows has changed.
1358 It is now built by running the same configure script as on all other
1359 platforms. This requires the MSYS environment and MinGW development
1360 tools. See the updated instructions in nt/INSTALL for details.
1362 Using the Posix configure script and Makefile's also means a change in
1363 the directory structure of the Emacs installation on Windows. It is
1364 now the same as on GNU and Unix systems. In particular, the auxiliary
1365 programs, such as cmdproxy.exe and hexl.exe, are in
1366 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1367 version), version-independent site-lisp is in share/emacs/site-lisp,
1368 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1369 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1370 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1371 directories and will find the files in there automatically; there's no
1372 need to set any variables due to this change.)
1375 ** Emacs on Windows 2000 and later can now access files and directories
1376 whose names cannot be encoded in the current system codepage.
1378 The new variable `w32-unicode-filenames' controls this feature: if it
1379 is t, Emacs uses Unicode APIs to pass file names to system calls,
1380 which lifts the limitation of file names to the current locale.
1383 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1384 The backtrace is written to the 'emacs_backtrace.txt' file in the
1385 directory where Emacs was running.
1388 ** The variable `buffer-file-type' is no longer supported.
1389 Setting it has no effect, and %t in the mode-line format is ignored.
1390 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1391 modifying it has no effect.
1394 ** Lock files now work on MS-Windows.
1395 This helps to prevent losing your edits if the same file is being
1396 edited in another Emacs session or by another user. See the node
1397 "Interlocking" in the Emacs User Manual for the details. To disable
1398 file locking, customize `create-lockfiles' to nil.
1400 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1401 GNUstep and Mac OS X 10.4 use the old font backend.
1402 To use the old backend by default, do on the command line:
1403 % defaults write org.gnu.Emacs FontBackend ns
1405 ** Improved fullscreen support on Mac OS X.
1406 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1407 Customize `ns-use-native-fullscreen' to change the style.
1408 For Mac OS X 10.7 and newer, native is the default.
1410 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1411 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1412 does not apply to images.
1415 * Installation Changes in Emacs 24.3
1417 ** The default X toolkit is now Gtk+ version 3.
1418 If you don't pass `--with-x-toolkit' to configure, or if you use
1419 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1420 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1421 You can explicitly require a specific version by passing
1422 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1424 ** New configure option `--enable-link-time-optimization', to utilize
1425 an appropriate feature provided by GCC since version 4.5.0.
1427 ** New configure option `--without-all' to disable most of the optional
1428 features (image support, etc.) that are normally enabled by default.
1430 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1431 Emacs). If building with GCC, this enables compile-time checks that
1432 warn/give errors about possibly-questionable C code. On a recent GNU
1433 system there should be no warnings; on older and on non-GNU systems
1434 the results may be useful to developers.
1436 ** The configure option `--enable-use-lisp-union-type' has been
1437 renamed to `--enable-check-lisp-object-type', as the resulting
1438 Lisp_Object type no longer uses a union to implement the compile time
1439 check that this option enables.
1441 ** The configure option `--disable-maintainer-mode' has been removed,
1442 as it was confusingly-named and rarely useful.
1444 ** The configure options `--program-prefix', `--program-suffix', and
1445 `--program-transform-name' apply to more than just the installed
1446 binaries. Now they also affect the man pages, icons, and the
1447 etc/emacs.desktop file; but not the info pages, since this would break
1448 links between the various manuals.
1450 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1451 overwriting "emacs" in the installation bin/ directory with a link
1454 ** Emacs uses libtinfo in preference to libncurses, if available.
1456 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1457 /usr/pkg/lib to the linker search path. You must add them yourself if
1460 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1461 (from the bin and libexec directories, respectively). The former is
1462 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1465 * Startup Changes in Emacs 24.3
1467 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1468 lisp/ directory. There should not be any there anyway. If you have
1469 been adding them there, put them somewhere else; e.g., site-lisp.
1471 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1474 * Changes in Emacs 24.3
1478 *** `C-h f' (`describe-function') can now perform autoloading.
1479 When this command is called for an autoloaded function whose docstring
1480 contains a key substitution construct, that function's library is
1481 automatically loaded, so that the documentation can be shown
1482 correctly. To disable this, set `help-enable-auto-load' to nil.
1484 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1485 even after their associated libraries have been loaded (and the
1486 autoloads have been redefined as functions).
1490 *** Images displayed via ImageMagick now support transparency and the
1491 :background image specification property.
1493 *** When available, ImageMagick support is automatically enabled.
1494 It is no longer necessary to call `imagemagick-register-types'
1495 explicitly to install ImageMagick image types; that function is called
1496 automatically at startup, or when customizing an imagemagick- option.
1498 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1499 ImageMagick to view images. (You must call `imagemagick-register-types'
1500 afterwards if you do not use customize to change this.)
1502 *** The new variable `imagemagick-enabled-types' also affects which
1503 ImageMagick types are treated as images. The function
1504 `imagemagick-filter-types' returns the list of types that will be
1509 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1510 next and previous path separator, respectively.
1512 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1513 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1514 non-nil before enabling the mode.
1518 *** New option `mode-line-default-help-echo' specifies the help text
1519 (shown in a tooltip or in the echo area) for any part of the mode line
1520 that does not have its own specialized help text.
1522 *** You can now click mouse-3 in the coding system indicator to invoke
1523 `set-buffer-file-coding-system'.
1525 ** Server and client
1527 *** emacsclient now obeys string values for `initial-buffer-choice',
1528 if it is told to open a new frame without specifying any file to visit
1529 or expression to evaluate.
1531 *** New option `server-auth-key' specifies a shared server key.
1533 ** Emacs now generates backtraces on fatal errors.
1534 On encountering a fatal error, Emacs now outputs a textual description
1535 of the fatal signal, and a short backtrace on platforms like glibc
1536 that support backtraces.
1538 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1539 This minor mode replaces `toggle-read-only', which is now obsolete.
1541 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1542 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1543 respectively, without exiting from the prompt.
1545 ** In the Package Menu, newly-available packages are listed as "new",
1546 and sorted above the other "available" packages by default.
1548 ** If your Emacs was built from a repository checkout, the new variable
1549 `emacs-bzr-version' contains information about the bzr revision used.
1551 ** New option `create-lockfiles' specifies usage of lockfiles.
1552 It defaults to t. Changing it to nil inhibits the creation of lock
1553 files (use this with caution).
1555 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1556 variables on remote hosts.
1558 ** The entry for PCL-CVS has been removed from the Tools menu.
1559 The PCL-CVS commands are still available via the keyboard.
1561 ** Using "unibyte: t" in Lisp source files is obsolete.
1562 Use "coding: raw-text" instead.
1564 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1565 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1566 The previous binding, introduced in Emacs 24.1, was a mistake, because
1567 `C-c LETTER' bindings are reserved for user customizations.
1569 ** Internationalization
1571 *** New language environment: Persian.
1573 *** New input method `vietnamese-vni'.
1575 ** Nextstep (GNUstep / Mac OS X) port
1577 *** Support for fullscreen and the frame parameter fullscreen.
1579 *** A file dialog is used for open/save operations initiated from the
1583 * Editing Changes in Emacs 24.3
1585 ** Search and Replace
1587 *** Non-regexp Isearch now performs "lax" space matching.
1588 Each sequence of spaces in the supplied search string may match any
1589 sequence of one or more whitespace characters, as specified by the
1590 variable `search-whitespace-regexp'. (This variable is also used by a
1591 similar existing feature for regexp Isearch.)
1593 *** New Isearch command `M-s SPC' toggles lax space matching.
1594 This applies to both ordinary and regexp Isearch.
1596 *** New option `replace-lax-whitespace'.
1597 If non-nil, `query-replace' uses flexible whitespace matching too.
1600 *** Global `M-s _' starts a symbol (identifier) incremental search,
1601 and `M-s _' in Isearch toggles symbol search mode.
1602 `M-s c' in Isearch toggles search case-sensitivity.
1604 ** Navigation commands
1606 *** New binding `M-g c' for `goto-char'.
1608 *** New binding `M-g TAB' for `move-to-column'.
1610 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1611 interactively with no prefix arg. Previously, it moved to column 1.
1613 ** New option `yank-handled-properties' allows processing of text
1614 properties on yanked text, in ways that are more general than just
1615 removing them (as is done by `yank-excluded-properties').
1617 ** New option `delete-trailing-lines' specifies whether
1618 M-x delete-trailing-whitespace should delete trailing lines at the end
1619 of the buffer. It defaults to t.
1621 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1623 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1624 `ucs-insert' is now an obsolete alias for `insert-char'.
1626 ** The `z' key no longer has a binding in most special modes.
1627 It used to be bound to `kill-this-buffer', but `z' is too easy to
1630 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1631 It copies the region-rectangle as the last rectangle kill.
1635 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1637 *** New option `register-separator' specifies the register containing
1638 the text to put between collected texts for use with
1639 M-x append-to-register and M-x prepend-to-register.
1642 * Changes in Specialized Modes and Packages in Emacs 24.3
1644 ** Common Lisp emulation (CL)
1646 *** CL's main entry is now (require 'cl-lib).
1647 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1648 i.e., all its definitions have the "cl-" prefix (and internal definitions
1649 use the "cl--" prefix).
1651 If `cl' provided a feature under the name `foo', then `cl-lib'
1652 provides it under the name `cl-foo' instead; with the exceptions of the
1653 few `cl' definitions that had to use `foo*' to avoid conflicts with
1654 pre-existing Elisp entities. These have been renamed to `cl-foo'
1655 rather than `cl-foo*'.
1657 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1658 provide the old, non-prefixed names. Some exceptions are listed below:
1660 *** `cl-flet' is not like `flet' (which is deprecated).
1661 Instead it obeys the behavior of Common-Lisp's `flet'.
1662 In particular, in cl-flet function definitions are lexically scoped,
1663 whereas in flet the scoping is dynamic.
1665 *** `cl-labels' is slightly different from `labels'.
1666 The difference is that it relies on the `lexical-binding' machinery
1667 (as opposed to the `lexical-let' machinery used previously) to capture
1668 definitions in closures, so such closures will only work if `lexical-binding'
1671 *** `cl-letf' is not exactly like `letf'.
1672 The only difference is in details that relate to some deprecated usage
1673 of `symbol-function' in place forms.
1675 *** `progv' was rewritten to use the `let' machinery.
1676 A side effect is that variables without corresponding values are bound
1677 to nil rather than being made unbound.
1679 *** The following methods of extending `setf' are obsolete
1680 (use features from gv.el instead):
1681 `define-modify-macro' (use `gv-letplace')
1682 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1683 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1684 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1688 *** Changes are now highlighted using the same color scheme as in
1689 modern VCSes. Deletions are displayed in red (new faces
1690 `diff-refine-removed' and `smerge-refined-removed', and new definition
1691 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1692 and `smerge-refined-added', and new definition of `diff-added').
1694 *** The variable `diff-use-changed-face' defines whether to use the
1695 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1696 changes in context diffs.
1698 *** The new command `diff-delete-trailing-whitespace' removes trailing
1699 whitespace introduced by a diff.
1701 ** Ediff now uses the same color scheme as Diff mode.
1705 A new version of python.el, which provides several new features, including:
1706 per-buffer shells, better indentation, Python 3 support, and improved
1707 shell-interaction compatible with iPython (and virtually any other
1710 *** Some user options have been replaced/renamed, including (old -> new):
1711 **** python-indent -> python-indent-offset
1712 **** python-guess-indent -> python-indent-guess-indent-offset
1713 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1714 **** python-use-skeletons -> python-skeleton-autoinsert
1716 *** Some user options have been removed, including:
1718 **** `python-indent-string-contents': Strings are never indented.
1720 **** `python-honour-comment-indentation':
1721 Comments are always considered as indentation markers.
1723 **** `python-continuation-offset': Indentation is automatically
1724 calculated in a pep8 compliant way depending on the context.
1726 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1727 Have no direct mapping as the shell interaction is completely different.
1729 **** `python-python-command', `python-jython-command':
1730 Replaced by `python-shell-interpreter'.
1732 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1733 `python-pdbtrack-minor-mode-string', `python-source-modes':
1736 *** Some commands have been replaced (old -> new):
1737 **** python-insert-class -> python-skeleton-class
1738 **** python-insert-def -> python-skeleton-def
1739 **** python-insert-for -> python-skeleton-for
1740 **** python-insert-if -> python-skeleton-if
1741 **** python-insert-try/except -> python-skeleton-try
1742 **** python-insert-try/finally -> python-skeleton-try
1743 **** python-insert-while -> python-skeleton-while
1744 **** python-find-function -> python-nav-jump-to-defun
1745 **** python-next-statement -> python-nav-forward-sentence
1746 **** python-previous-statement -> python-nav-backward-sentence
1747 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1748 **** python-end-of-defun-function -> python-nav-end-of-defun
1749 **** python-send-buffer -> python-shell-send-buffer
1750 **** python-send-defun -> python-shell-send-defun
1751 **** python-send-region -> python-shell-send-region
1752 **** python-send-region-and-go -> emulate with python-shell-send-region
1753 and python-shell-switch-to-shell
1754 **** python-send-string -> python-shell-send-string
1755 **** python-switch-to-python -> python-shell-switch-to-shell
1756 **** python-describe-symbol -> python-eldoc-at-point
1760 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1762 *** The D-Bus object manager interface is implemented.
1764 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1765 if their value does not fit into Emacs's integer range.
1767 *** The function `dbus-call-method' is now non-blocking.
1768 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1770 *** Signals can also be sent as unicast messages.
1772 *** The argument list of `dbus-register-signal' has been extended,
1773 according to the new match rule types of D-Bus.
1775 *** `dbus-init-bus' supports private connections.
1777 *** There is a new function `dbus-setenv'.
1779 ** `desktop-path' no longer includes the "." directory.
1780 Desktop files are now located in ~/.emacs.d by default.
1784 *** `dired-do-async-shell-command' executes each file sequentially
1785 if the command ends in `;' (when operating on multiple files).
1786 Otherwise, it executes the command on each file in parallel.
1788 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1789 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1792 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1793 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1794 mark/unmark/flag all files in the active region.
1796 *** The minibuffer default for `=' (`dired-diff') has changed.
1797 It is now the backup file for the file at point, if one exists.
1798 In Transient Mark mode the default is the file at the active mark.
1800 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1801 The global binding for `M-=', `count-words-region' is in effect.
1805 *** New module "notifications", which can send a notification when you
1806 receive a private message or your nickname is mentioned.
1808 *** ERC will look up server/channel names via auth-source and use any
1811 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1812 only applies to messages sent by lurkers.
1814 ** reStructuredText mode
1816 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1817 fontification, comment handling, and customization have all been revised
1820 *** Support for `imenu' and `which-function-mode'.
1822 *** The reStructuredText syntax is more closely covered.
1823 Sphinx support has been improved.
1825 *** `rst-insert-list' inserts new list or continues existing lists.
1827 *** A negative prefix argument always works for `rst-adjust'.
1829 *** The window configuration is reset after displaying a TOC.
1831 *** The constant `rst-version' describes the rst.el package version.
1835 *** Support for percent literals and recognition of regular expressions
1836 in method calls without parentheses with more methods, including Cucumber
1839 *** Improved syntax highlighting and indentation.
1841 *** New command `ruby-toggle-block', bound to `C-c {'.
1843 *** Some non-standard keybindings/commands have been removed:
1845 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1847 **** `ruby-mark-defun'; use `mark-defun'.
1849 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1850 appropriate settings for the variables `beginning-of-defun-function'
1851 and `end-of-defun-function'.
1853 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1854 `reindent-then-newline-and-indent' and `newline' have been removed.
1856 ** Shell Script mode
1858 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1860 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1862 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1866 *** The free software compiler GHDL is supported (and now the default).
1868 *** Support for the VHDL-AMS packages has been added/updated.
1870 *** Updated to the 2002 revision of the VHDL standard.
1872 *** Accepts \r and \f as whitespace.
1876 *** The faces used by Apropos are now directly customizable.
1877 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1878 see the `apropos' Custom group for details.
1880 *** The old options whose values specified faces to use have been removed
1881 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1885 *** This package has been rewritten to use Tabulated List mode.
1887 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1888 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1892 *** Algebraic simplification mode is now the default.
1893 To restrict to the limited simplifications given by the former
1894 default simplification mode, use `m I'.
1898 *** You can customize the header text that appears above each calendar month.
1899 See the variable `calendar-month-header'.
1901 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1903 *** The calendars produced by cal-html include holidays.
1904 Customize `cal-html-holidays' to change this.
1908 *** The major modes from the parser generators "Bovine" and "Wisent"
1909 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1910 are in `auto-mode-alist', and the corresponding manuals are included.
1914 **** Menu support for the "Configuration" feature. This allows users to
1915 choose the active configuration (such as debug or install) from the menu.
1917 **** New command `ede-set' to interactively set project-local variables.
1919 **** Support for compiling, debugging, and running in "generic" projects.
1921 **** Autoconf editing support for M4 macros with complex arguments.
1923 **** Compilation support for the "linux" project type.
1925 **** "simple" projects have been removed; use "generic" projects instead.
1929 **** Support for parsing #include statements inside a namespace in C/C++.
1931 **** Improved support for 'extern "C"' declarations in C/C++.
1933 **** The ability to ignore more common special C/C++ preprocessor symbols,
1934 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1935 If available, include cdefs.h as an additional source of preprocessor symbols.
1937 **** Improved C/C++ function pointer parsing.
1939 **** In Python, support for converting imports to include file names.
1941 **** Ability to dynamically determine the Python load path.
1943 **** Support for the Python 'WITH' and 'AT' keywords.
1945 **** Improved tooltip completion.
1949 **** The SRecode manual is now included.
1951 **** Tag generation supports constructor/destructor settings and system
1952 include differentiation.
1954 **** Addition of 'Framework' support: Frameworks are specified when a
1955 particular kind of library (such as Android) is needed in a common language
1958 **** Support for nested templates and let variables override based on priority.
1960 **** Support for merging tables from multiple related modes, such as
1961 default -> c++ -> arduino.
1963 ** Compile has a new option `compilation-always-kill'.
1967 *** `custom-reset-button-menu' now defaults to t.
1969 *** Non-option variables are never matched in `customize-apropos' and
1970 `customize-apropos-options' (i.e., the prefix argument does nothing for
1971 these commands now).
1975 *** The variables `term-default-fg-color' and `term-default-bg-color'
1976 are now deprecated in favor of the customizable face `term'.
1978 *** You can customize how to display ANSI terminal colors and styles
1979 by customizing the corresponding `term-color-<COLOR>',
1980 `term-color-underline' and `term-color-bold' faces.
1984 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1986 *** Remote processes are now also supported on remote MS-Windows hosts.
1990 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1991 Previously, this slot stored semicolon-separated attribute-value pairs
1992 appended to some imap URLs, but this is not compatible with RFC 3986.
1993 So now the `filename' slot stores the entire path and query components,
1994 and the `attributes' slot is always nil.
1996 *** New function `url-encode-url' for encoding a URI string.
1997 The `url-retrieve' function now uses this to encode its URL argument,
1998 in case that is not properly encoded.
2000 ** notifications.el supports now version 1.2 of the Notifications API.
2001 The function `notifications-get-capabilities' returns the supported
2004 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2005 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2006 `flymake-warning-bitmap'.
2008 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2009 specifying URL types that should be converted to remote file names at
2010 the FFAP prompt. The default is now '("ftp").
2012 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2013 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2015 ** New option `mouse-avoidance-banish-position' specifies where the
2016 `banish' mouse avoidance setting moves the mouse.
2018 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2019 closing brackets to be aligned with the line of the opening bracket.
2021 ** In Proced mode, new command `proced-renice' renices marked processes.
2023 ** New option `async-shell-command-buffer' specifies the buffer to use
2024 for a new asynchronous `shell-command' when the default output buffer
2025 `*Async Shell Command*' is already in use.
2027 ** SQL mode has a new option `sql-db2-escape-newlines'.
2028 If non-nil, newlines sent to the command interpreter will be escaped
2029 by a backslash. The default does not escape the newlines and assumes
2030 that the sql statement will be terminated by a semicolon.
2032 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2033 (and modes that derive from it), sorts the column at point, or the Nth
2034 column if a numeric prefix argument is given.
2036 ** `which-func-modes' now defaults to t, so Which Function mode, when
2037 enabled, applies to all applicable major modes.
2039 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2042 ** Follow mode no longer works by using advice.
2043 The option `follow-intercept-processes' has been removed.
2045 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2047 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2048 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2049 *** semantic-change-hooks -> semantic-change-functions
2050 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2051 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2052 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2053 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2054 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2055 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2056 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2057 *** rcirc-activity-hooks -> rcirc-activity-functions
2058 *** rcirc-print-hooks -> rcirc-print-functions
2059 *** dbus-event-error-hooks -> dbus-event-error-functions
2060 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2061 *** checkdoc-style-hooks -> checkdoc-style-functions
2062 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2063 *** archive-extract-hooks -> archive-extract-hook
2064 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2065 *** hfy-post-html-hooks -> hfy-post-html-hook
2066 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2067 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2068 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2069 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2071 ** Obsolete packages
2074 In most cases, assoc+member+push+delq work just as well.
2075 And in any case it's just a terrible package: ugly semantics, terrible
2076 inefficiency, and not namespace-clean.
2085 * Incompatible Lisp Changes in Emacs 24.3
2087 ** Docstrings starting with `*' no longer indicate user options.
2088 Only variables defined using `defcustom' are considered user options.
2089 The function `user-variable-p' is now an obsolete alias for
2090 `custom-variable-p'.
2092 ** The return values of `defalias', `defun' and `defmacro' have changed,
2093 and are now undefined. For backwards compatibility, `defun' and
2094 `defmacro' currently return the name of the newly defined
2095 function/macro, but this should not be relied upon.
2097 ** `random' by default now returns a different random sequence in
2098 every Emacs run. Use `(random S)', where S is a string, to set the
2099 random seed to a value based on S, in order to get a repeatable
2100 sequence in later calls.
2102 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2103 that substring is inserted literally even if the LITERAL arg is
2104 non-nil, instead of causing an error to be signaled.
2106 ** `select-window' now always makes the window's buffer current.
2107 It does so even if the window was selected before.
2109 ** The function `x-select-font' can return a font spec, instead of a
2110 font name as a string. Whether it returns a font spec or a font name
2111 depends on the graphical library.
2113 ** `face-spec-set' no longer sets frame-specific attributes when the
2114 third argument is a frame (that usage was obsolete since Emacs 22.2).
2116 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2118 ** The CL package's `get-setf-method' function no longer exists.
2119 Generalized variables are now part of core Emacs Lisp, and implemented
2120 differently to the way cl.el used to do it. It is not possible to
2121 define a compatible replacement for `get-setf-method'. See the file
2122 gv.el for internal details of the new implementation.
2124 ** The arguments of `dbus-register-signal' are no longer just strings,
2125 but keywords or keyword-string pairs. The old argument list will
2126 still be supported for Emacs 24.x.
2128 ** Miscellaneous name changes
2129 Some Lisp symbols have been renamed to correct their spelling,
2130 or to be more consistent with standard Emacs terminology.
2132 *** Renamed functions
2133 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2134 **** inactivate-input-method -> deactivate-input-method
2135 **** quail-inactivate -> quail-deactivate
2136 **** robin-inactivate -> robin-deactivate
2137 **** viper-inactivate-input-method -> viper-deactivate-input-method
2138 **** viper-inactivate-input-method-action ->
2139 viper-deactivate-input-method-action
2140 **** ucs-input-inactivate -> ucs-input-deactivate
2143 The old hooks are still supported for backward compatibility, but they
2144 are deprecated and will be removed eventually.
2145 **** input-method-inactivate-hook -> input-method-deactivate-hook
2146 **** robin-inactivate-hook -> robin-deactivate-hook
2147 **** quail-inactivate-hook -> quail-deactivate-hook
2149 *** Renamed variables
2150 **** follow-deactive-menu -> follow-inactive-menu
2151 **** inactivate-current-input-method-function ->
2152 deactivate-current-input-method-function
2154 ** Some obsolete functions, variables, and faces have been removed:
2155 *** `last-input-char', `last-command-char', `unread-command-char'
2156 *** `facemenu-unlisted-faces'
2157 *** `rmail-decode-mime-charset'
2158 *** `iswitchb-read-buffer'
2159 *** `sc-version', `sc-submit-bug-report'
2160 *** `set-char-table-default'
2161 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2162 *** `compile-internal'
2164 *** `mode-line-inverse-video'
2165 *** `follow-mode-off-hook'
2166 *** `cvs-commit-buffer-require-final-newline'
2167 (use `log-edit-require-final-newline' instead)
2168 *** `cvs-changelog-full-paragraphs'
2169 (use `log-edit-changelog-full-paragraphs' instead)
2170 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2171 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2172 *** `vc-master-templates' (use `vc-handled-backends' instead)
2173 *** `vc-checkout-carefully'
2176 * Lisp Changes in Emacs 24.3
2178 ** CL-style generalized variables are now in core Elisp.
2179 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2180 You can define your own generalized variables using `gv-define-simple-setter',
2181 `gv-define-setter', etc.
2183 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2184 This can significantly speed up execution of non-byte-compiled code,
2185 but can also bump into previously unnoticed cyclic dependencies.
2186 These are generally harmless: they will simply cause the macro calls
2187 to be left for later expansion (as before), but will result in a
2188 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2189 You may wish to restructure your code so this does not happen.
2191 ** New sampling-based Elisp profiler.
2192 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2193 When finished, use M-x profiler-stop. The sampling rate can be based on
2194 CPU time or memory allocations.
2196 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2197 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2199 ** New macros `setq-local' and `defvar-local'.
2201 ** Face underlining can now use a wave.
2203 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2204 of `read-regexp' accepts a string ending with a colon and space, and its
2205 second argument DEFAULTS can be a list of strings accessible via `M-n'
2206 in the minibuffer ahead of other hard-coded useful regexp-related values.
2207 More commands use `read-regexp' now to read their regexp arguments.
2211 *** New function `completion-table-with-quoting' to handle completion
2212 in the presence of quoting, such as file completion in shell buffers.
2214 *** New function `completion-table-subvert' to use an existing completion
2215 table, but with a different prefix.
2219 *** New error type and new function `user-error'.
2220 These do not trigger the debugger.
2222 *** New option `debugger-bury-or-kill', saying what to do with the
2223 debugger buffer when exiting debug.
2225 *** Set `debug-on-message' to enter the debugger when a certain
2226 message is displayed in the echo area. This can be useful when trying
2227 to work out which code is doing something.
2229 *** New var `inhibit-debugger', automatically set to prevent accidental
2230 recursive invocations.
2234 *** New command `fit-frame-to-buffer' adjusts the frame height to
2237 *** The command `fit-window-to-buffer' can adjust the frame height
2238 if the new option `fit-frame-to-buffer' is non-nil.
2240 *** New macro `with-temp-buffer-window', similar to
2241 `with-output-to-temp-buffer'.
2243 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2246 *** New option `switch-to-buffer-preserve-window-point' to restore a
2247 window's point when switching buffers.
2249 *** New display action alist entries `window-height' and `window-width'
2250 specify the size of new windows created by `display-buffer'.
2252 *** New display action alist entry `pop-up-frame-parameters', if
2253 non-nil, specifies frame parameters to give any newly-created frame.
2255 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2256 tells display action functions to avoid changing which frame is
2259 *** New display action alist entry `previous-window', if non-nil,
2260 specifies window to reuse in `display-buffer-in-previous-window'.
2262 *** New display action functions `display-buffer-below-selected',
2263 and `display-buffer-in-previous-window'.
2265 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2266 now accept a third argument to avoid choosing the selected window.
2268 *** Additional values recognized for option `window-combination-limit'.
2270 *** The following variables are obsolete, as they can be replaced by
2271 appropriate entries in the `display-buffer-alist' function introduced
2273 **** `dired-shrink-to-fit'
2274 **** `display-buffer-reuse-frames'
2275 **** `display-buffer-function'
2276 **** `special-display-buffer-names'
2277 **** `special-display-frame-alist'
2278 **** `special-display-function'
2279 **** `special-display-regexps'
2283 *** `current-time-string' no longer requires that its argument's year
2284 must be in the range 1000..9999. It now works with any year supported
2285 by the underlying C implementation.
2287 *** `current-time' now returns extended-format time stamps
2288 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2289 PSEC is typically a multiple of 1000 on current machines. Other
2290 functions that use this format, such as `file-attributes' and
2291 `format-time-string', have been changed accordingly. Old-format time
2292 stamps are still accepted.
2294 *** The format of timers in `timer-list' and `timer-idle-list' is now
2295 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2296 The PSECS slot is new, and uses picosecond resolution. It can be
2297 accessed via the new `timer--psecs' accessor.
2299 *** Last-modified time stamps in undo lists now are of the form
2300 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2304 *** Improved security when handling persistent objects:
2306 **** `eieio-persistent-read' now features optional arguments for specifying
2307 the class to load, as well as a flag stating whether subclasses are allowed;
2308 if provided, other classes will be rejected by the reader. For
2309 compatibility with existing code, if the class is omitted only a
2312 **** New specialized reader for pulling in classes and signaling errors
2313 without evaluation of suspicious code.
2315 **** All slots that contain objects must have a :type. Slots with lists
2316 of objects must use a new type predicate for a list of an object type.
2318 *** Support for `find-function' and similar utilities, through the addition
2319 of filename support to generated symbols.
2321 ** Floating point functions now always return special values like NaN,
2322 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2323 Previously, they returned NaNs on some platforms but signaled errors
2324 on others. The affected functions are acos, asin, tan, exp, expt,
2325 log, log10, sqrt, and mod.
2327 ** New fringe bitmap `exclamation-mark'.
2329 ** Miscellaneous changes to special forms and macros
2331 *** `defun' and `defmacro' are now macros rather than special forms.
2333 *** `kbd' is now a function rather than a macro.
2335 ** Miscellaneous new functions
2337 *** `set-temporary-overlay-map' sets up a temporary keymap that
2338 takes precedence over most other maps for a short while (normally one key).
2340 *** `autoloadp' tests if its argument is an autoloaded object.
2342 *** `autoload-do-load' performs the autoloading operation.
2344 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2346 *** `file-name-base' returns a file name sans directory and extension.
2348 *** `function-get' fetches a function property, following aliases.
2350 *** `posnp' tests if an object is a `posn'.
2352 *** `system-users' returns the user names on the system.
2354 *** `system-groups' returns the group names on the system.
2356 *** `tty-top-frame' returns the topmost frame of a text terminal.
2358 ** The following functions and variables are obsolete:
2359 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2360 *** `buffer-has-markers-at'
2361 *** `macro-declaration-function' (use `macro-declarations-alist')
2362 *** `window-system-version' (provides no useful information)
2363 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2364 *** `query-replace-interactive'
2365 *** `font-list-limit' (has had no effect since Emacs < 23)
2368 * Changes in Emacs 24.3 on Non-Free Operating Systems
2370 ** Cygwin builds can use the native MS Windows user interface.
2371 Pass `--with-w32' to configure. The default remains the X11 interface.
2373 ** Two new functions are available in Cygwin builds:
2374 `cygwin-convert-file-name-from-windows' and
2375 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2376 code to access the Cygwin file-name mapping machinery to convert
2377 between Cygwin and Windows-native file and directory names.
2379 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2380 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2381 `mouse-autoselect-window'.
2383 ** On MS Windows Vista and later Emacs now supports symbolic links.
2385 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2386 support for libxml2, even if its presence is detected.
2388 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2390 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2391 directories to the search path. You must add them yourself if you want them.
2394 * Changes in Emacs 24.2
2396 ** This is mainly a bug-fix release.
2399 * Installation Changes in Emacs 24.1
2401 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2402 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2403 also depend on Gtk+. You can disable them with --without-rsvg and
2406 ** Emacs can be compiled with GnuTLS support.
2407 This happens by default if a suitably recent version of the library is
2408 found at build time. To prevent this, use the configure option
2409 `--without-gnutls'. See below for GnuTLS features.
2411 ** Emacs can be compiled with SELinux support.
2412 This happens by default if a suitably recent version of the library is
2413 found at build time. To prevent this, use the configure option
2414 `--without-selinux'. See below for SELinux features.
2416 ** Emacs can be compiled with ImageMagick support.
2417 This happens by default if a suitably recent version of the library is
2418 found at build time. To prevent this, use the configure option
2419 `--without-imagemagick'. See below for ImageMagick features.
2420 This feature is not available for the Nextstep or MS ports.
2422 ** Emacs can be compiled with libxml2 support.
2423 This happens by default if a suitably recent version of the library is
2424 found at build time. To prevent this, use the configure option
2425 `--without-xml2'. See below for libxml2 features.
2427 ** By default, the installed Info and man pages are compressed.
2428 You can disable this by configuring --without-compress-info.
2430 ** New configure option --with-wide-int.
2431 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2432 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2435 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2436 These provide no new functionality, they just remove the need to edit
2437 lib-src/Makefile by hand in order to use the associated features.
2439 ** New configure option --enable-use-lisp-union-type.
2440 This is only useful for Emacs developers to debug certain types of bugs.
2441 This is not a new feature; only the configure flag is new.
2443 ** The standalone programs digest-doc and sorted-doc are removed.
2444 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2446 ** The standalone program `fakemail' is removed.
2447 If you need it, feedmail.el provides a superset of the functionality.
2450 * Startup Changes in Emacs 24.1
2452 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2453 command line arguments, and the EMACS_UNIBYTE environment variable, no
2454 longer have any effect. (They were declared obsolete in Emacs 23.)
2456 ** New command line option `--no-site-lisp' removes site-lisp directories
2457 from load-path. -Q now implies this. This option does not affect the
2458 EMACSLOADPATH environment variable (and hence has no effect for
2462 * Changes in Emacs 24.1
2466 *** Many packages now use the `completion-at-point' command,
2467 rather than implementing separate completion commands.
2469 *** `completion-at-point' now handles tags and semantic completion.
2471 *** Completion in a non-minibuffer now tries to detect the end of completion
2472 and pops down the *Completions* buffer accordingly.
2474 *** New option `completion-cycle-threshold' allows completion cycling.
2476 *** New option `completion-category-overrides' for overriding the
2477 default completion style in certain circumstances.
2479 *** New completion style `substring'.
2481 *** Completion of buffer names uses `substring' completion by default.
2483 *** The option `widget-complete-field' has been removed.
2487 *** The first time you try sending mail, Emacs asks for a mail method.
2488 This is implemented by a new default for `send-mail-function', which
2489 is `sendmail-query-once'. This offers to use the smtpmail package, or
2490 to use the old defaults relying on external mail facilities
2491 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2492 `mailclient-send-it' on Windows).
2494 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2495 transfers the report to your desktop's preferred mail client, if there
2496 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2499 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2500 and Mail mode changes
2502 ** Emacs server and client changes
2504 *** New option `server-port' specifies the port for TCP Emacs servers.
2506 *** New emacsclient argument -q/--quiet suppresses some status messages.
2508 *** New emacsclient argument --frame-parameters specifies the frame
2509 parameters of any newly-created graphical frame.
2511 *** If emacsclient shuts down due to Emacs signaling an error,
2512 its exit status is 1.
2514 *** New emacsclient argument --parent-id ID.
2515 This opens a client frame in parent X window ID, via XEmbed, similar
2516 to the --parent-id argument to Emacs.
2518 ** Internationalization changes
2520 *** Emacs now supports display and editing of bidirectional text.
2521 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2522 displayed in the correct visual order as expected by users of those
2523 scripts. The display reordering is a "full bidirectionality" class
2524 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2525 with no RTL text should look exactly the same as before.
2527 **** New buffer-local variable `bidi-display-reordering'.
2528 To disable display reordering in a buffer, change this to nil.
2530 **** New buffer-local variable `bidi-paragraph-direction'.
2531 If nil (the default), Emacs determines the base direction of each
2532 paragraph from its text, as specified by the UBA. Setting the value
2533 to `right-to-left' or `left-to-right' forces a base direction on each
2536 Paragraphs with right-to-left base direction are displayed starting at
2537 the right window edge.
2539 *** Enhanced support for characters with no glyphs in available fonts,
2540 or, on text terminals, characters that cannot be encoded by the
2541 terminal coding system. The new option `glyphless-char-display-control'
2542 specifies how to display them: as a hexadecimal code in a box, a thin
2543 1-pixel space, an empty box, etc.
2545 *** New input methods for Farsi and Bulgarian
2546 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2548 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2549 (U+2010 and U+2011).
2551 *** New Hebrew translation of the Emacs Tutorial.
2552 Type `C-u C-h t' to choose it in case your language setup doesn't
2553 automatically select it.
2555 ** An Emacs Lisp package manager is now included.
2556 This is a convenient way to download and install additional packages,
2557 from a package repository at http://elpa.gnu.org.
2559 *** M-x list-packages shows a list of packages, which can be
2560 selected for installation.
2562 *** New command `describe-package', bound to `C-h P'.
2564 *** By default, all installed packages are loaded automatically when
2565 Emacs starts up. To disable this, set `package-enable-at-startup' to
2566 nil. To specify the packages to load, customize `package-load-list'.
2568 ** Custom theme changes
2570 *** New command `M-x customize-themes', which provides a convenient
2571 interface for enabling and disabling Custom themes.
2573 *** New option `custom-theme-load-path' is the load path for themes.
2574 Emacs no longer looks for Custom themes in `load-path'. The default
2575 value of `custom-theme-load-path' says to look for themes in
2576 `custom-theme-directory', followed by a subdirectory of
2577 `data-directory' named "themes/", which contains a small selection of
2578 built-in Custom themes.
2580 *** New option `custom-safe-themes' records known-safe theme files.
2581 If a theme is not in this list, Emacs queries before loading it, and
2582 offers to save the theme to `custom-safe-themes' automatically. By
2583 default, all themes included in Emacs are treated as safe.
2585 ** Improved GTK integration
2587 *** GTK scroll-bars are now placed on the right by default.
2588 The function `set-scroll-bar-mode' can change this.
2590 *** GTK tool bars can have just text, just images or images and text.
2591 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2592 the default is taken from desktop settings.
2594 *** GTK tool bars can be placed on any edge of the frame.
2595 The frame-parameter tool-bar-position controls this. It takes the
2596 values top, left, right or bottom. The Options => Show/Hide menu has
2599 *** The default colors for selected text (the `region' face) are taken
2600 from the GTK theme when Emacs is built with GTK.
2602 *** Emacs uses GTK tooltips by default if built with GTK.
2603 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2605 ** Graphical interface changes
2607 *** On graphical displays, the mode-line no longer ends in dashes.
2608 Also, the first dash (which does not indicate anything) is just
2609 displayed as a space.
2611 *** `menu-bar-select-buffer-function' lets you choose another operation
2612 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2614 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2615 built with Xft. These fonts can be set via X resources, for example:
2616 Emacs.pane.menubar.font: Courier-12
2620 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2621 or if it receives a SIGINT signal in batch mode.
2623 *** `kill-emacs-hook' is now also run in batch mode.
2624 Third-party code which adds to `kill-emacs-hook' should check if they
2625 do the right thing in batch mode.
2627 ** Scrolling changes
2629 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2630 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2631 of buffer at first key-press (instead they move to top/bottom of buffer)
2632 when `scroll-error-top-bottom' is non-nil.
2634 *** New option `scroll-error-top-bottom' (see above).
2636 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2637 scroll a line instead of full screen.
2639 *** New property `scroll-command' should be set on a command's symbol to
2640 define it as a scroll command affected by `scroll-preserve-screen-position'.
2642 *** If you customize `scroll-conservatively' to a value greater than 100,
2643 Emacs will never recenter point in the window when it scrolls due to
2644 cursor motion commands or commands that move point (e.f., `M-g M-g').
2645 Previously, you needed to use `most-positive-fixnum' as the value of
2646 `scroll-conservatively' to achieve the same effect.
2648 *** "Aggressive" scrolling now honors the scroll margins.
2649 If you customize `scroll-up-aggressively' or
2650 `scroll-down-aggressively' and move point off the window, Emacs now
2651 scrolls the window so as to avoid positioning point inside the scroll
2654 ** Basic SELinux support has been added.
2655 This requires Emacs to be linked with libselinux at build time.
2657 *** Emacs preserves the SELinux file context when backing up.
2658 Also, the function `copy-file' has an extra optional argument for
2659 preserving SELinux context, and the return value of `backup-buffer'
2660 now includes the SELinux context.
2662 *** New functions `file-selinux-context' and `set-file-selinux-context'
2663 get and set the SELinux context of a file.
2667 *** `delete-by-moving-to-trash' now only affects commands that specify
2668 trashing. This avoids inadvertently trashing temporary files.
2670 *** Calling `delete-file' or `delete-directory' with a prefix argument
2671 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2673 ** File- and directory-local variable changes
2675 *** You can stop directory local vars from applying to subdirectories.
2676 Add an element (subdirs . nil) to the alist portion of any variables
2677 settings to indicate that the section should not apply to
2680 *** Directory local variables can apply to some file-less buffers.
2681 Affected modes include dired, vc-dir, and log-edit. For example,
2682 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2683 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2684 `hack-dir-local-variables-non-file-buffer' to support this.
2686 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2687 Instead, use "eval: (minor-mode 1)".
2689 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2690 to `inhibit-local-variables-regexps'. As the name suggests, it now
2691 applies to ALL file local variables, not just -*- lines. The
2692 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2697 *** The `quit-window' command now restores the last buffer displayed
2698 in the quitted window.
2700 *** Resizing an Emacs frame now preserves proportional window sizes,
2701 modulo restrictions like window minimum sizes and fixed-size windows.
2703 *** The behavior of `display-buffer' is now customizable in detail.
2705 **** New option `display-buffer-base-action' specifies a list of
2706 user-determined display "actions" (functions and optional arguments
2707 for choosing the displaying window).
2709 This takes precedence over the default display action, which is
2710 specified by `display-buffer-fallback-action'.
2712 **** New option `display-buffer-alist' maps buffer name regexps to
2713 display actions, taking precedence over `display-buffer-base-action'.
2715 *** New option `window-combination-limit'.
2716 The new option `window-combination-limit' allows to return the space
2717 obtained for resizing or creating a window more reliably to the window
2718 from which such space was obtained.
2720 *** New option `window-combination-resize'.
2721 The new option `window-combination-resize' allows to split a window that
2722 otherwise cannot be split because it's too small by stealing space from
2723 other windows in the same combination. Subsequent resizing or deletion
2724 of the window will resize all windows in the same combination as well.
2726 *** New option `frame-auto-hide-function' lets you choose between
2727 iconifying or deleting a frame when burying a buffer in a dedicated
2728 frame, or quitting a window showing a buffer in a frame of its own.
2730 *** New commands `maximize-window' and `minimize-window'.
2731 These maximize and minimize the size of a window within its frame.
2733 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2734 These functions allow to navigate through the live buffers that have
2735 been shown in a specific window.
2737 ** Minibuffer changes
2739 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2740 This is handy for minibuffer-only frames, and is also used for the feature
2741 where mouse-1 pops up *Messages*"', which can now easily be changed.
2743 *** Minibuffers set `truncate-lines' to nil.
2744 If you want to change the value to something else, you could use
2745 for example `minibuffer-setup-hook'.
2747 ** `auto-mode-case-fold' is now enabled by default.
2749 ** `backup-by-copying-when-mismatch' now defaults to t.
2751 ** New basic faces `error', `warning', `success'.
2752 These are used to highlight text indicating failure, caution or
2753 successful operation.
2755 ** New option `list-colors-sort' defines the color sort order
2756 for `list-colors-display'.
2758 ** The variable `focus-follows-mouse' now always defaults to nil.
2761 * Editing Changes in Emacs 24.1
2765 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2766 `isearch-yank-line'.
2768 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2769 `isearch-yank-kill'.
2771 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2773 ** New commands `count-words-region' and `count-words'.
2775 *** M-= is bound to `count-words-region', not `count-lines-region'.
2776 The `count-words-region' command, when called interactively, reports
2777 the number of lines, words, and characters in the region. It is a
2778 superset of the old `count-lines-region', which is now an obsolete
2781 ** The command `just-one-space' (M-SPC), if given a negative argument,
2782 also deletes newlines around point.
2786 *** New option `delete-active-region'.
2787 If non-nil, [delete] and DEL delete the region if it is active and no
2788 prefix argument is given. If set to `kill', those commands kill
2791 *** New command `delete-forward-char', bound to [delete].
2792 This is meant for interactive use, and obeys `delete-active-region'.
2793 The command `delete-char' does not obey `delete-active-region'.
2795 *** `delete-backward-char' is now a Lisp function.
2796 Apart from obeying `delete-active-region', its behavior is unchanged.
2797 However, the byte compiler now warns if it is called from Lisp; Lisp
2798 callers should use delete-char with a negative argument instead.
2800 *** The option `mouse-region-delete-keys' has been deleted.
2802 ** Selection changes.
2804 The default handling of clipboard and primary selections has been
2805 changed to conform with modern X applications. In short, most
2806 commands for killing and yanking text now use the clipboard, while
2807 mouse commands use the primary selection.
2809 In the following, we provide a list of these changes, followed by a
2810 list of steps to get the old behavior back if you prefer that.
2812 *** `select-active-regions' now defaults to t.
2813 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2814 the kill ring. The selected text is put in the primary selection, if
2815 the system possesses a separate primary selection facility (e.g. X).
2817 **** `select-active-regions' also accepts a new value, `only'.
2818 This means to only set the primary selection for temporarily active
2819 regions (usually made by mouse-dragging or shift-selection);
2820 "ordinary" active regions, such as those made with C-SPC followed by
2821 point motion, do not alter the primary selection.
2823 **** `mouse-drag-copy-region' now defaults to nil.
2825 *** mouse-2 is now bound to `mouse-yank-primary'.
2826 This pastes from the primary selection, ignoring the kill-ring.
2827 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2829 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2831 *** `x-select-enable-primary' now defaults to nil.
2832 Thus, commands that kill text or copy it to the kill-ring (such as
2833 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2835 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2836 exactly equivalent to M-w, C-w, and C-y respectively.
2838 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2839 non-nil by default, as Windows does not support the primary selection
2840 between applications.
2842 *** To return to the previous behavior, do the following:
2844 **** Change `select-active-regions' to nil.
2845 **** Change `mouse-drag-copy-region' to t.
2846 **** Change `x-select-enable-primary' to t (on X only).
2847 **** Change `x-select-enable-clipboard' to nil.
2848 **** Bind `mouse-yank-at-click' to mouse-2.
2850 *** Support for X cut buffers has been removed.
2852 *** X clipboard managers are now supported.
2853 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2855 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2856 in the current rectangle. With a prefix argument, this prompts for a
2857 number to count from and for a format string.
2859 ** `redisplay-dont-pause' now defaults to t.
2860 This makes Emacs feel more responsive to editing commands that arrive
2861 at high rate, e.g. if you lean on some key, because stopping redisplay
2862 in the middle (when this variable is nil) forces more expensive
2863 updates later on, and Emacs appears to be unable to keep up.
2865 ** The behavior of <TAB> for active regions in Text mode has changed.
2866 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2867 when the region is active causes Emacs to indent all the lines in the
2868 region, aligning them with the line previous to the first line in the
2869 region (or with the left margin if there is no previous line).
2871 ** When `occur' is called with a prefix argument, matching strings are
2872 collected into the `*Occur*' buffer without line numbers. If there
2873 are parenthesized subexpressions in the specified regexp, `occur'
2874 reads replacement text that may contain \\& and \\N whose convention
2875 follows `replace-match'.
2878 * Changes in Specialized Modes and Packages in Emacs 24.1
2880 ** Archive Mode has basic support for browsing and updating 7z archives.
2884 *** BibTeX mode now supports biblatex.
2885 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2886 `bibtex-entry-field-alist' is now an obsolete alias for
2887 `bibtex-BibTeX-entry-alist'.
2889 *** New command `bibtex-search-entries', bound to C-c C-a.
2891 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2893 *** New variable `bibtex-search-entry-globally'.
2897 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2899 *** The default browser used by the package is now the "xdg-open" program,
2900 on platforms that support it. This calls your desktop's preferred browser.
2904 *** Support for musical notes.
2906 *** Support for logarithmic units.
2908 *** No longer uses the tex prefix for TeX specific unit names when
2909 using TeX or LaTeX mode.
2911 *** New option to highlight selections using faces.
2913 *** `calc-histogram' has the option of using a vector to determine the bins.
2915 *** New "O" option prefix.
2917 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2919 ** Calendar, Diary, and Appt
2921 *** Diary entries can contain non-printing "comments".
2922 See the variable `diary-comment-start'.
2924 *** Appointments can specify their individual warning times.
2925 See the variable `appt-warning-time-regexp'.
2927 *** The function specified by `appt-disp-window-function' may be passed
2928 lists of arguments if multiple appointments are due at similar times.
2929 If you are using a custom function for this, you should update it.
2931 *** New function `diary-hebrew-birthday'.
2933 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2934 may no longer be nil, but must all be strings.
2936 *** The obsolete (since Emacs 22.1) method of enabling the appt
2937 package by adding `appt-make-list' to `diary-hook' has been removed.
2938 Use `appt-activate' instead.
2940 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2941 appt-issue-message (use the function appt-activate)
2942 appt-visible/appt-msg-window (use the variable appt-display-format)
2944 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2945 view-diary-entries, list-diary-entries, show-all-diary-entries
2949 *** New feature to "guess" the style in an existing buffer.
2950 The main entry point is M-x c-guess.
2952 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2954 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2955 Thus C-M-a will, by default, go to the beginning of the immediate function,
2958 *** "Macros with semicolons" can be registered for correct indentation.
2959 Where such a macro ends a line (no semicolon) the next statement is no longer
2960 parsed as a statement continuation.
2962 ** Comint and modes derived from it use the standard completion code.
2966 *** Compilation mode can be used without Font Lock mode.
2967 `compilation-parse-errors-function' is now obsolete.
2969 *** New variable `compilation-filter-start', which is bound while
2970 `compilation-filter-hook' runs. It records the start position of the
2971 text inserted by `compilation-filter'.
2973 *** `compilation-error-screen-columns' and `compilation-first-column'
2974 are obeyed in the editing buffer. So programming language modes can
2975 set them, whereas previously only the value in the *Compilation*
2980 *** Customize buffers now contain a search field.
2981 The search is performed using `customize-apropos'.
2982 To turn off the search field, set `custom-search-field' to nil.
2984 *** Options in customize group buffers start out hidden if not customized.
2985 Use the arrow to the left of the option name to toggle visibility.
2987 *** custom-buffer-sort-alphabetically now defaults to t.
2989 *** The color widget now has a "Choose" button, which allows you to
2990 choose a color via `list-colors-display'.
2994 *** It is now possible to access buses other than the default system
2997 *** The `dbus-register-method' and `dbus-register-property' functions
2998 optionally do not register names.
3000 *** The new function `dbus-register-service' registers a known service
3001 name on a D-Bus without also registering a property or a method.
3005 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3006 if called with a prefix argument, read a file name from the minibuffer
3007 instead of using the current buffer.
3009 *** The "dired local variables" feature of Dired-x is obsolete.
3010 The standard directory local variables feature replaces it.
3014 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3015 controlling attempts to autojoin a channel.
3017 *** New variable `erc-coding-system-precedence': If we use `undecided'
3018 as the server coding system, this variable will then be consulted.
3019 The default is to decode strings that can be decoded as utf-8 as
3020 utf-8, and do the normal `undecided' decoding for the rest.
3024 *** The default value of `eshell-directory-name' has changed
3025 to be an "eshell" directory in `user-emacs-directory'.
3026 The old "~/.eshell/" directory is still used if it exists, though.
3030 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3031 It now supports multithread non-stop debugging and simultaneous
3032 debugging of several threads.
3036 *** RET (`image-toggle-animation') toggles animation, if applicable.
3037 Animation plays once, unless the option `image-animate-loop' is non-nil.
3041 *** New command M-x info-display-manual displays a named Info manual.
3042 If that manual is already visited in some Info buffer, it displays
3043 that buffer. (This is handy if you have many manuals in many *info*
3044 buffers, and don't remember the name of the buffer visiting the manual
3045 you want to consult.) Otherwise, it loads and displays the manual.
3047 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3048 This is for compatibility with the stand-alone Info reader program,
3049 and also because `Info-edit' is a rarely used command that is disabled
3052 ** Mail mode changes (not Message mode)
3054 *** New command M-x mail-add-attachment for adding MIME attachments
3056 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3057 (Its name is misleading, since it has nothing to do with MIME
3058 attachments.) The old name is now an obsolete alias to the new name.
3060 ** MH-E has been updated to MH-E version 8.3.1.
3061 See MH-E-NEWS for details.
3063 ** Modula-2 mode provides auto-indentation.
3065 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3067 ** nXML mode no longer binds C-RET to `nxml-complete'.
3068 Completion is now performed via `completion-at-point', bound to C-M-i
3069 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3070 default), this performs tag completion.
3072 ** Org mode has been updated to version 7.8.09.
3073 See ORG-NEWS for details.
3075 ** Prolog mode has been completely revamped, with lots of additional
3076 functionality such as more intelligent indentation, electricity,
3077 support for more variants, including Mercury, and a lot more.
3081 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3082 in the Rmail incoming message.
3084 *** The variable `rmail-message-filter' no longer has any effect.
3085 This change was made in Emacs 23.1 but was not advertised at the time.
3086 Try using `rmail-show-message-hook' instead.
3090 *** M-x shell prompts for the shell path name if the default directory
3091 is a remote file name and neither the environment variable $ESHELL nor
3092 the variable `explicit-shell-file-name' is set.
3094 *** TAB is now bound to the standard `completion-at-point' command,
3095 which now implements the pcomplete rules for shell command completion.
3099 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3100 if the mail server supports them. This uses either built-in GnuTLS
3101 support, or the starttls.el library. Customize `smtpmail-stream-type'
3104 *** The variable `smtpmail-auth-credentials' has been removed.
3105 By default, the information is now stored in the file ~/.authinfo.
3106 This was the default value of smtpmail-auth-credentials. If you had
3107 customized smtpmail-auth-credentials to a list of user names and
3108 passwords, those settings are not used. During your first connection
3109 to the smtp server, Emacs will prompt for the user name and password,
3110 and offer to save them to ~/.authinfo. Or you can manually copy the
3111 credentials to ~/.authinfo. For example, if you had
3113 (setq smtpmail-auth-credentials
3114 '(("mail.example.org" 25 "jim" "s!cret")))
3116 then the equivalent line in ~/.authinfo would be
3118 machine mail.example.org port 25 login jim password s!cret
3120 See the auth-source manual for more information, e.g. on encrypting
3121 the credentials file.
3123 *** The variable `smtpmail-starttls-credentials' has been removed.
3124 If you had that set, you need to put
3126 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3128 in your ~/.authinfo file instead.
3130 *** SMTPmail defaults to using the address in the From: header as the
3131 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3132 to the address you wish to use instead.
3136 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3137 and `sql-oracle-scan-on'.
3139 *** New options controlling prompting for login parameters.
3140 Each supported product has a custom variable `sql-*-login-params',
3141 which is a list of the parameters to be prompted for before a
3142 connection is established.
3144 *** The command `sql-product-interactive' now takes a prefix argument,
3145 which causes it to prompt for an SQL product.
3147 *** Product-specific SQL interactive commands now take prefix arguments.
3148 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3149 given a prefix argument, prompt for a name for the SQL interactive
3150 buffer. This reduces the need for calling `sql-rename-buffer'.
3152 *** SQL interactive modes suppress command continuation prompts, and
3153 replace tabs with spaces. The first change impacts multiple line SQL
3154 statements entered with C-j between each line, statements yanked into
3155 the buffer and statements sent with `sql-send-*' functions. The
3156 second prevents the MySQL and Postgres interpreters from listing
3157 object name completions when sent text via `sql-send-*' functions.
3159 *** New command `sql-connect' starts a predefined SQLi session,
3160 using the login parameters from `sql-connection-alist'.
3162 *** New "Save Connection" menu item in SQLi buffers.
3163 This gathers the login params specified for the SQLi session, if it
3164 was not started by a connection, and saves them as a new connection.
3166 *** New commands for listing database objects and details:
3167 sql-list-all and sql-list-table.
3169 *** An API for manipulating SQL product definitions has been added.
3173 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3177 *** New inline access method "ksu" (kerberized su).
3179 *** The following access methods are discontinued: "ssh1_old",
3180 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3182 *** The user option `remote-file-name-inhibit-cache' controls whether
3183 remote file attributes are cached for better performance.
3185 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3186 default value to "".
3188 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3189 for remote machines which support SELinux.
3191 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3192 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3193 the degree of parallelism.
3195 ** VC and related modes
3197 *** Support for pulling on distributed version control systems.
3198 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3199 supported (currently with Bzr, Git, and Mercurial), to update the
3200 current branch and working tree. A prefix argument means to prompt
3201 the user for specifics, e.g. a pull location.
3203 *** `vc-update' is now an alias for `vc-pull'.
3205 *** Support for merging on distributed version control systems.
3206 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3207 is supported (currently with Bzr, Git, and Mercurial), to merge
3208 changes from another branch into the current one. It prompts for
3209 specifics, e.g. a merge source.
3211 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3212 shows a diff while querying the user. It defaults to t.
3214 *** Log entries in some Log View buffers can be toggled to display a
3215 longer description by typing RET (log-view-toggle-entry-display).
3216 This is currently supported for Bzr, Git, and Mercurial (to support
3217 another backend, define a `log-view-expanded-log-entry-function').
3218 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3219 use this to display the full log entry for the revision at point.
3221 *** New command `vc-ediff' allows visual comparison of two revisions
3222 of a file similar to `vc-diff', but using ediff backend.
3224 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3225 this was not advertised at the time.
3227 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3228 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3229 this was not advertised at the time.
3235 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3237 *** partial-completion-mode (complete.el) is obsolete.
3238 You can get a comparable behavior with:
3239 (setq completion-styles '(partial-completion initials))
3240 (setq completion-pcm-complete-word-inserts-delimiters t)
3242 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3244 *** pgg is obsolete (use EasyPG instead).
3246 *** sregex.el is obsolete, since rx.el is a strict superset.
3248 *** s-region.el and pc-select.el are obsolete.
3249 They are superseded by shift-select-mode, enabled by default since 23.1.
3251 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3255 *** The Landmark game is now invoked with `landmark', not `lm'.
3256 Its functions and variables have been similarly renamed.
3258 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3259 (This interfered with cua-mode.)
3261 *** f90.el has some support for Fortran 2008 syntax.
3263 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3265 *** New command `nato-region' converts text to NATO phonetic alphabet.
3268 * New Modes and Packages in Emacs 24.1
3270 ** Occur Edit mode applies edits made in *Occur* buffers to the
3271 original buffers. It is bound to "e" in Occur mode.
3273 ** New global minor mode electric-pair-mode.
3274 When enabled, typing an open parenthesis automatically inserts the
3275 matching closing one.
3277 ** New global minor mode electric-indent-mode.
3278 When enabled, typing certain characters triggers reindentation.
3279 Major modes wishing to use this can set electric-indent-chars or
3280 electric-indent-functions.
3282 ** New global minor mode electric-layout-mode.
3283 When enabled, typing certain characters automatically inserts newlines.
3284 Major modes wishing to use this can set electric-layout-rules.
3286 ** tabulated-list.el provides a generic major mode for tabulated data,
3287 from which other modes can be derived.
3289 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3291 ** secrets.el is an implementation of the Secret Service API, an
3292 interface to password managers like GNOME Keyring or KDE Wallet. The
3293 Secret Service API requires D-Bus for communication. The command
3294 `secrets-show-secrets' offers a buffer with a visualization of the
3297 ** notifications.el provides an implementation of the Desktop
3298 Notifications API. It requires D-Bus for communication.
3300 ** soap-client.el supports access to SOAP web services from Emacs.
3301 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3303 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3305 ** New emacs-lock.el package.
3306 The previous version has been moved to obsolete/old-emacs-lock.el.
3307 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3308 against exiting Emacs and killing the buffer can be set separately.
3309 The mechanism for automatically turning off protection for buffers
3310 with dead inferior processes has been generalized.
3313 * Incompatible Lisp Changes in Emacs 24.1
3315 ** Passing a nil argument to a minor mode function call now ENABLES
3316 the minor mode unconditionally. This is so that you can write e.g.
3318 (add-hook 'text-mode-hook 'foo-mode)
3320 to enable foo-mode in Text mode buffers, removing the need for
3321 `turn-on-foo-mode' style functions. This affects all mode commands
3322 defined by `define-minor-mode'. If called interactively, the mode
3323 command still toggles the minor mode.
3325 ** The return value of `backup-buffer' has changed.
3326 It is now a list of three elements, where the second element is a list
3327 describing the original file's SELinux context. If Emacs or the
3328 system lacks SELinux support, the context list is (nil nil nil nil).
3329 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3331 ** `char-direction-table' and the `char-direction' function were deleted.
3332 They were buggy and inferior to the new support of bidirectional
3333 editing introduced in Emacs 24. If you need the bidirectional
3334 properties of a character, use `get-char-code-property' with the last
3335 argument `bidi-class'.
3337 ** `copy-directory' now copies the source directory as a subdirectory
3338 of the target directory, if the latter is an existing directory. The
3339 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3340 the contents directly into a pre-existing target directory.
3342 ** For mouse click input events in the text area, the Y pixel
3343 coordinate in the POSITION list now counts from the top of the text
3344 area, excluding any header line. Previously, it counted from the top
3347 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3348 been further reduced. Now a backquote not followed by a space is
3349 always treated as a "new-style" backquote. Please remove all
3350 "old-style" backquotes from your code. If your code uses backquotes
3351 as documented in the Elisp manual, and compiles without warning, then
3352 you have nothing to do in this regard. Code not following the
3353 appropriate conventions may fail to compile.
3355 The most common cause of trouble seems to be an old-style backquote
3356 followed by a newline. Another cause of trouble is vector notation
3357 for key sequence notation: instead of [(control ,)] and [(control ')],
3358 you should write [(control ?,)] and [(control ?')], which will work in
3361 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3362 was not advertised at the time. The function `custom-initialize-delay'
3363 replaced all known uses.
3365 ** `view-buffer' now treats special mode-class in the same way that
3366 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3367 major mode is special).
3369 ** Menu and tool bar changes
3371 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3372 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3373 With these alist entries omitted, `make-frame' checks the value of the
3374 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3375 a menu-bar or tool-bar, respectively. If the alist entries are added,
3376 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3378 *** The menu bar bindings's caches are not used any more.
3379 Use (where-is-internal <def> nil t) instead.
3381 ** Regions created by mouse dragging are now normal active regions,
3382 similar to those created by shift-selection (see Selection changes
3383 above). In previous Emacs versions, these regions were delineated by
3384 `mouse-drag-overlay'; that variable has been removed.
3386 ** The fourth argument of `filter-buffer-substring' has been removed.
3387 If you want to remove text properties from the final result, simply
3388 pass the result through substring-no-properties.
3390 ** cl.el no longer provides `cl-19'.
3392 ** The following obsolete functions and aliases have been removed
3393 (the appropriate new function is given in parentheses; "not needed"
3394 means you can just remove all calls to the function in question):
3396 *** `comint-kill-output' (`comint-delete-output')
3397 *** `decompose-composite-char' (`char-to-string')
3398 *** `outline-visible' (`outline-invisible-p')
3399 *** `internal-find-face' (`facep')
3400 *** `internal-get-face' (`facep and check-face')
3401 *** `frame-update-faces' (not needed)
3402 *** `frame-update-face-colors' (`frame-set-background-mode')
3403 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3404 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3405 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3406 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3407 *** `x-make-font-unbold' (`make-face-unbold')
3408 *** `x-make-font-unitalic' (`make-face-unitalic')
3409 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3410 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3411 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3412 *** `char-bytes' (== 1)
3413 *** `isearch-return-char' (`isearch-printing-char')
3414 *** `make-local-hook' (not needed)
3415 *** `set-screen-height' (`set-frame-height')
3416 *** `set-screen-width' (`set-frame-width')
3418 ** The following obsolete variables and varaliases have been removed
3419 (the appropriate new variable is given in parentheses):
3421 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3422 *** `vc-header-alist' (`vc-BACKEND-header')
3423 *** `directory-sep-char' (== ?/)
3424 *** `font-lock-defaults-alist' (`font-lock-defaults')
3425 *** `e' (`float-e').
3427 ** The following obsolete files were removed:
3428 sc.el, x-menu.el, rnews.el, rnewspost.el
3430 ** The format of the finder-inf.el file has changed, since the Finder
3431 mechanism is now based on the package system. The variable
3432 `finder-package-info' is replaced by `package--builtins' and
3433 `finder-keywords-hash'.
3435 ** When generating autoloads, `update-directory-autoloads' no longer
3436 assumes every inspected file is in your `load-path'. It instead
3437 generates relative names according to the current `load-path'.
3440 * Lisp Changes in Emacs 24.1
3442 ** Code can now use lexical scoping by default instead of dynamic scoping.
3443 The `lexical-binding' variable enables lexical scoping for local
3444 variables. It is typically set via a file-local variable in the first
3445 line of the file, in which case it applies to all the code in that
3448 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3449 binding instead of the old dynamic binding mode.
3451 *** Lexically scoped interpreted functions are represented with a new form
3452 of function value which looks like (closure ENV ARGS &rest BODY).
3454 *** New macro `letrec' to define recursive local functions.
3456 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3457 So do `defcustom' and other forms that call `defvar' as a subroutine.
3459 *** New function `special-variable-p' to check whether a variable is
3460 declared as dynamically bound.
3462 *** The form ((lambda ...) ...) is deprecated.
3464 ** An Emacs Lisp testing tool is now included.
3465 Emacs Lisp developers can use this tool to write automated tests for
3466 their code. See the ERT info manual for details.
3468 ** Changes for bidirectional display and editing
3470 *** New function `current-bidi-paragraph-direction'.
3471 This returns the base direction of the paragraph at point.
3473 *** New function `bidi-string-mark-left-to-right'.
3474 Given a string containing characters from right-to-left scripts, this
3475 function returns another string which can be safely inserted into a
3476 buffer, such that any following text will be always displayed to the
3477 right of that string. (This works by appending an invisible Unicode
3478 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3480 This is useful when the buffer has overall left-to-right paragraph
3481 direction and you need to insert a string whose contents are not known
3482 in advance, without disrupting the layout of the line.
3486 *** Window tree functions are accessible in Elisp.
3487 Functions are provided to return the parent, siblings or child windows
3488 of any window including internal windows (windows not associated with a
3489 buffer) in the window tree.
3491 **** New function `window-valid-p' gives non-nil for live and internal
3494 **** Window manipulation can deal with internal windows.
3495 Many window handling functions like `split-window', `delete-window', or
3496 `delete-other-windows' as well as the window resizing functions can now
3497 act on any window including internal ones.
3499 *** window-total-height/-width vs window-body-height/-width.
3500 The function `window-height' has been renamed to `window-total-height'
3501 and `window-width' has been renamed to `window-body-width'. The old
3502 names are provided as aliases. Two new functions `window-total-width'
3503 and `window-body-height' are provided.
3505 *** Window parameters specific to window handling functions.
3506 For each window you can specify a parameter to override the default
3507 behavior of a number of functions like `split-window', `delete-window'
3508 and `delete-other-windows'. The variable `ignore-window-parameters'
3509 allows to ignore processing such parameters.
3511 *** New semantics of third argument of `split-window'.
3512 The third argument of `split-window' has been renamed to SIDE and can be
3513 set to any of the values 'below, 'right, 'above, or 'left to make the
3514 new window appear on the corresponding side of the window that shall be
3515 split. Any other value of SIDE will cause `split-window' to split the
3516 window into two side-by-side windows as before.
3518 *** Window resizing functions.
3519 A new standard function for resizing windows called `window-resize' has
3520 been introduced. This and all other functions for resizing windows no
3521 longer delete any windows when they become too small.
3523 *** Deleting the selected window now selects the most recently selected
3524 live window on that frame instead.
3526 *** `adjust-window-trailing-edge' adjustments.
3527 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3528 is able to resize other windows if a window adjacent to the trailing
3529 edge cannot be shrunk any more. This makes its behavior more similar to
3530 that of Emacs 21 without compromising, however, its inability to delete
3531 windows which was introduced in Emacs 22.
3533 *** Window-local buffer lists.
3534 Windows now have local buffer lists. This means that removing a buffer
3535 from display in a window will preferably show the buffer previously
3536 shown in that window with its previous window-start and window-point
3537 positions. This also means that the same buffer may be automatically
3538 shown twice even if it already appears in another window.
3540 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3541 which if non-nil requires the buffer to be displayed in the currently
3542 selected window, signaling an error otherwise. If nil, another window
3543 can be used, e.g. if the selected one is strongly dedicated.
3545 *** `split-window-vertically' and `split-window-horizontally' renamed
3546 to `split-window-below' and `split-window-right' respectively.
3547 The old names are kept as aliases.
3551 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3552 named ACTION, and takes a display action of the same form as
3553 `display-buffer-base-action' (see Changes, above). A non-nil,
3554 non-list value is treated specially, as the old meaning.
3556 **** New variable `display-buffer-overriding-action'.
3558 **** The procedure of `display-buffer' etc. to choose a window is
3559 determined by combining `display-buffer-overriding-action',
3560 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3561 and `display-buffer-fallback-action'. The second and fourth of these
3562 are user-customizable variables.
3564 See the docstring of `display-buffer' for details.
3566 *** New functions `window-state-get' and `window-state-put'.
3567 These functions allow to save and restore the state of an arbitrary
3568 frame or window as an Elisp object.
3572 *** New variable `completion-extra-properties' used to specify extra
3573 properties of the current completion:
3574 - :annotate-function, same as the old completion-annotate-function.
3575 - :exit-function, function to call after completion took place.
3577 *** Functions on `completion-at-point-functions' can return any of the
3578 properties valid for `completion-extra-properties'.
3580 *** `completion-annotate-function' is obsolete.
3582 *** New `metadata' method for completion tables. The metadata thus returned
3583 can specify various details of the data returned by `all-completions':
3584 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3585 used to select a style in completion-category-overrides.
3586 - `annotation-function' to add annotations in *Completions*.
3587 - `display-sort-function' to specify how to sort entries in *Completions*.
3588 - `cycle-sort-function' to specify how to sort entries when cycling.
3590 *** `minibuffer-local-filename-must-match-map' is not used any more.
3591 Instead, the bindings in `minibuffer-local-filename-completion-map'
3592 are combined with `minibuffer-local-must-match-map'.
3594 *** New variable `completing-read-function' allows overriding the
3595 behavior of `completing-read'.
3597 ** `glyphless-char-display' can now distinguish between graphical and
3598 text terminal display, via a char-table entry that is a cons cell.
3600 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3601 Instead, the offending function is removed.
3605 *** New function `run-hook-wrapped' for running an abnormal hook by
3606 passing the hook functions as arguments to a "wrapping" function.
3607 Like `run-hook-with-args-until-success', it stops at the first
3608 non-nil return value.
3610 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3611 set of "wrapping" filters, similar to around advice.
3612 (A version of this macro was actually added in Emacs 23.2 but was not
3613 advertised at the time.)
3617 *** New macro `condition-case-unless-debug' (this was actually added in
3618 Emacs 23.1 as condition-case-no-debug, but not advertised)
3620 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3622 *** Variable `stack-trace-on-error' removed.
3624 *** The debugger can now "continue" from an error, which means it will
3625 jump to the error handler as if the debugger had not been invoked
3626 instead of jumping all the way to the top-level.
3628 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3629 This can be useful when `inhibit-quit' is set.
3631 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3632 named Emacs server instances.
3634 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3635 to redirect STDOUT to a file.
3637 ** The function `format-time-string' now supports the %N directive,
3638 for higher-resolution time stamps.
3640 ** New input reading functions
3642 *** New function `read-char-choice' reads a restricted set of
3643 characters, discarding any inputs not inside the set.
3645 *** The command `read-color' now requires a match for a color name
3646 or RGB triplet, instead of signaling an error if the user provides
3649 **** `facemenu-read-color' is now an alias for `read-color'.
3651 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3652 The variable is now used to load all kind of supported dynamic libraries,
3653 not just image libraries. The previous name is still available as an
3656 ** Syntax parsing changes
3658 *** New variable `syntax-propertize-function'.
3659 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3660 This allows syntax-table properties to be set independently from font-lock:
3661 just call syntax-propertize to make sure the text is propertized.
3662 Together with this new variable come a new hook
3663 syntax-propertize-extend-region-functions, as well as two helper functions:
3664 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3665 as-is; and syntax-propertize-rules which provides a new way to specify
3668 *** Syntax tables support a new "comment style c" additionally to style b.
3670 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3672 ** frame-local variables cannot be let-bound any more.
3674 ** Major and minor mode changes
3676 *** `set-auto-mode' now respects mode: local variables at the end of files,
3677 as well as those in the -*- line.
3679 *** `prog-mode' is a new major mode from which programming modes
3682 **** `prog-mode-hook' can be used to enable features for programming
3683 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3684 on-the-fly spell checking for comments and strings.
3686 *** New hook `change-major-mode-after-body-hook', run by
3687 `run-mode-hooks' just before any other mode hooks.
3689 *** Enabled globalized minor modes can be disabled in specific major modes.
3690 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3691 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3693 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3695 ** File-handling changes
3697 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3698 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3699 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3700 argument is supplied (see Trash changes, above).
3702 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3704 ** Tool-bars can display separators.
3705 Tool-bar separators are handled like menu separators in menu-bar maps,
3706 i.e. via menu entries of the form `(menu-item "--")'.
3710 *** Animated images support (currently animated gifs only).
3712 **** `image-animated-p' returns non-nil if an image can be animated.
3714 **** `image-animate' animates a supplied image spec.
3716 **** `image-animate-timer' returns the timer object for an image that
3719 *** `image-extension-data' has been renamed to `image-metadata'.
3720 The old name is an obsolete alias to the new one.
3722 *** Image mode can view any image type that ImageMagick supports.
3723 This requires Emacs to be built with ImageMagick support.
3725 **** New function `imagemagick-types', defined if ImageMagick support
3726 is enabled, returns a list of image file extensions that your
3727 ImageMagick installation supports.
3729 **** New function `imagemagick-register-types' enables ImageMagick
3730 image types in Image mode and in `create-image' and other helper
3733 **** New option `imagemagick-types-inhibit' excludes certain
3734 ImageMagick image types from `imagemagick-register-types'.
3736 **** With ImageMagick support, there are extra Image mode commands to
3737 resize and rotate images: `image-transform-fit-to-height',
3738 `image-transform-fit-to-width', `image-transform-set-rotation', and
3739 `image-transform-set-scale'.
3741 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3742 passes it to the mail user agent function. This argument specifies an
3743 action for returning to the caller after finishing with the mail. For
3744 example, this is used by Rmail to optionally delete a mail window.
3746 ** XML and HTML parsing
3747 If Emacs is compiled with libxml2 support, there are two new
3748 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3749 and `libxml-parse-xml-region' (which parses XML). Both return an
3750 Emacs Lisp parse tree.
3752 ** Networking and encryption changes
3754 *** `open-network-stream' can now be used to open an encrypted stream.
3755 It now accepts an optional `:type' parameter for initiating a TLS
3756 connection, directly or via STARTTLS. To do STARTTLS, additional
3757 parameters (`:end-of-command', `:success', `:capabilities-command')
3758 must also be supplied.
3760 *** New library gnutls.el.
3761 The new function `gnutls-available-p' returns non-nil if Emacs is
3762 built with GnuTLS support. The main entry points are
3763 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3764 these functions through `open-network-stream', because that can
3765 upgrade connections through STARTTLS opportunistically or use plain
3766 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3769 *** New primitive `secure-hash' that supports many secure hash algorithms:
3770 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3771 sha1.el has been removed. The `sha1' feature is provided by default.
3775 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3777 ** Progress reporters can now "spin".
3778 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3779 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3780 time you call `progress-reporter-update' on that progress reporter,
3781 with a nil or omitted VALUE argument, the reporter message is
3782 displayed with a "spinning bar".
3784 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3785 being reverted, even if the buffer has a local `revert-buffer-function'.
3787 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3788 If delayed-warnings-list is non-nil, the command loop calls
3789 `delayed-warnings-hook' after `post-command-hook'. At present, this
3790 is only used by Emacs on some platforms to display warnings during
3791 startup, which might otherwise not be noticed. This uses the
3792 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3794 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3796 ** New function `make-composed-keymap' that constructs a new keymap
3797 from multiple input maps. You can use this to make a keymap that
3798 inherits from multiple maps, eg:
3799 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3801 ** New function `string-prefix-p'.
3802 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3804 ** New reader macro ## that stands for the empty symbol.
3805 This means that the empty symbol can now be read back. Also, #: by itself
3806 (when not immediately followed by a possible symbol character) stands for
3807 an empty uninterned symbol.
3809 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3811 ** The following functions and variables are obsolete:
3813 *** `tooltip-use-echo-area' is obsolete.
3814 Rather than setting this to t, disable Tooltip mode instead.
3816 *** buffer-substring-filters is obsolete.
3817 Use `filter-buffer-substring-functions' instead.
3819 *** `byte-compile-disable-print-circle' is obsolete.
3821 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3822 Use `post-command-hook' instead.
3824 *** `font-lock-maximum-size' is obsolete.
3827 * Changes in Emacs 24.1 on Non-Free Operating Systems
3829 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3830 and also when HOME is set to C:\ by default.
3832 ** New configure.bat options
3834 *** --enable-checking builds Emacs with extra runtime checks.
3836 *** --distfiles specifies files to be included in binary distribution.
3838 *** --without-gnutls disables automatic GnuTLS detection.
3840 *** --lib for general library linkage, works with the USER_LIBS build variable.
3842 ** New make target `dist' to create binary distribution for MS Windows.
3844 ** The Lisp function `w32-default-color-map' is now obsolete.
3845 (It is only used internally in the Emacs C code.)
3847 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3848 reappear on mouse-over. (Requires OS X 10.6 or later.)
3850 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3851 other platforms, rather than inserting its contents into the buffer.
3854 ----------------------------------------------------------------------
3855 This file is part of GNU Emacs.
3857 GNU Emacs is free software: you can redistribute it and/or modify
3858 it under the terms of the GNU General Public License as published by
3859 the Free Software Foundation, either version 3 of the License, or
3860 (at your option) any later version.
3862 GNU Emacs is distributed in the hope that it will be useful,
3863 but WITHOUT ANY WARRANTY; without even the implied warranty of
3864 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3865 GNU General Public License for more details.
3867 You should have received a copy of the GNU General Public License
3868 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3873 paragraph-separate: "[
\f]*$"