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 `--with-file-notification-no'. 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-` will always invoke `tmm-menubar', even if
111 `tty-menu-open-use-tmm' is nil.)
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 *** `split-window' is now a non-interactive function, not a command.
201 As a command, it was a special case of `C-x 2' (`split-window-below'),
202 and as such superfluous. After being reimplemented in Lisp, its
203 interactive form was mistakenly retained.
206 *** New option `scroll-bar-adjust-thumb-portion'.
207 Available only on X, this option allows to control over-scrolling
208 using the scroll bar (i.e. dragging the thumb down even when the end
209 of the buffer is visible).
211 ** Lisp evaluation changes
213 *** `eval-defun' on an already defined defcustom calls the :set function,
217 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
218 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
219 zero prefix argument. This disables truncation of lists in the output,
220 equivalent to setting `(eval-expression-)print-length' and
221 `(eval-expression-)print-level' to nil. Additionally, it causes integers
222 to be printed in other formats (octal, hexadecimal, and character).
225 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
228 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
229 because it affects caching of paragraph scanning results as well.
230 Also, it is now enabled by default.
233 ** The option `set-mark-default-inactive' has been deleted.
234 This unfinished feature was introduced by accident in Emacs 23.1;
235 simply disabling Transient Mark mode does the same thing.
237 ** The default value of `comment-use-global-state' is now t,
238 and this variable has been marked obsolete.
241 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
242 and works for git too, if you fetch the repository notes.
244 ** `read-regexp-defaults-function' defines a function to read regexps,
245 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp', etc.
246 You can customize this to specify a function that provides a default
247 value from the regexp last history element, or from the symbol found
251 ** New option `load-prefer-newer' affects how the `load' function chooses
252 the file to load. If this is non-nil, then when both .el and .elc
253 versions of a file exist, and the caller did not explicitly specify
254 which one to load, then the newer file is loaded. The default, nil,
255 means to always load the .elc file.
258 * Editing Changes in Emacs 24.4
260 ** Indentation changes
263 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
264 When invoked without a prefix argument, it now activates a transient
265 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
266 the text indentation in the region. Typing any other key resumes
267 normal editing behavior.
269 *** `electric-indent-mode' is enabled by default.
272 *** `tab-stop-list' is now implicitly extended to infinity by repeating
273 the last step. Its default value is changed to nil, which means a tab
274 stop every `tab-width' columns.
278 *** New command `cycle-spacing' cycles between spacing conventions:
279 having just one space, no spaces, or reverting to the original
280 spacing. Like `just-one-space', it can handle or ignore newlines and
281 leave different number of spaces.
284 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
285 a one-letter word, which is an error according to some typographical
286 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
289 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
291 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
292 Most commands are still unaware of it, but kill/yank do work on the rectangle.
295 ** New option `visual-order-cursor-movement'.
296 If this is non-nil, cursor motion with arrow keys will follow the
297 visual order of characters on the screen: <left> always moves to the
298 left, <right> always moves to the right, disregarding the surrounding
299 bidirectional context.
303 *** All register commands can now show help with preview.
306 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
309 *** New command `C-x r f' (`frameset-to-register').
310 See Changes in Emacs 24.4, above.
313 ** New command `delete-duplicate-lines'.
314 This searches the region for identical lines, and removes all but one
315 copy of each repeated line. The lines need not be sorted.
318 * Changes in Specialized Modes and Packages in Emacs 24.4
321 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
323 ~/.emacs.d/timelog replaces ~/.timelog
324 ~/.emacs.d/vip replaces ~/.vip
325 ~/.emacs.d/viper replaces ~/.viper
326 ~/.emacs.d/ido.last replaces ~/.ido.last
327 ~/.emacs.d/kkcrc replaces ~/.kkcrc
328 ~/.emacs.d/quickurls replaces ~/.quickurls
329 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
330 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
331 ~/.emacs.d/places replaces ~/.emacs-places
332 ~/.emacs.d/shadows replaces ~/.shadows
333 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
334 ~/.emacs.d/strokes replaces ~/.strokes
335 ~/.emacs.d/notes replaces ~/.notes
336 ~/.emacs.d/type-break replaces ~/.type-break
337 Also the following files used by the now obsolete otodo-mode.el:
338 ~/.emacs.d/todo-do replaces ~/.todo-do
339 ~/.emacs.d/todo-done replaces ~/.todo-done
340 ~/.emacs.d/todo-top replaces ~/.todo-top
342 ** Backtrace and debugger
344 *** The Lisp debugger's `e' command now includes the lexical environment
345 when evaluating the code in the context at point. Hence, it now lets
346 you access lexical variables.
349 *** New command `v' (`debugger-toggle-locals') displays local vars.
351 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
352 code run via JIT Lock.
355 ** Battery information can now be retrieved from BSD's `apm' utility.
358 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
360 ** Calendar and Diary
363 *** New faces `calendar-weekday-header', `calendar-weekend-header',
364 and `calendar-month-header'.
367 *** New option `calendar-day-header-array'.
370 *** New variable `diary-from-outlook-function', used by the command
371 `diary-from-outlook'.
374 *** The variable `calendar-font-lock-keywords' is obsolete.
379 *** Calc by default now uses the Gregorian calendar for all dates, and
380 uses January 1, 1 AD as its day number 1. Previously Calc used the
381 Julian calendar for dates before September 14, 1752, and it used
382 December 31, 1 BC as its day number 1; the new scheme is more
383 consistent with Calendar's calendrical system and day numbering.
386 *** The new option `calc-gregorian-switch' lets you configure if
387 (and when) Calc switches from the Julian to the Gregorian calendar.
390 *** Support for ISO 8601 dates.
396 **** The cpp-root project now supports executing a compile command.
397 It can be set through the new :compile-command slot or the
398 buffer-local variable `compile-command'.
400 **** Better selection of include directories for the 'linux' project.
401 Include directories now support out-of-tree build directories and
402 target architecture auto-detection.
406 **** Improved detection of used namespaces in current scope in C++.
408 **** Parsing of default values for variables and function arguments in C/C++.
409 They are also displayed by the summarize feature in the mode line.
411 **** Improved parsing of function pointers in C/C++.
412 This also includes parsing of function pointers as function arguments.
414 **** Parsing of C/C++ preprocessor macros that open new scope.
415 For example, this enables parsing of macros that open new namespaces.
417 **** Support for 'this' pointer in inline member functions in C++.
421 *** New macro `cl-tagbody'.
424 *** letf is now just an alias for cl-letf.
428 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
429 Hence, you can now enable it independently from those modes, and from
430 `transient-mark-mode'.
433 *** `cua-highlight-region-shift-only' is now obsolete.
434 You can disable `transient-mark-mode' to get the same result.
436 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
441 *** Support for completion, ElDoc, and Flycheck has been added.
444 *** The current CFEngine syntax is parsed from "cf-promises -s json".
445 There is a fallback syntax available if you don't have cf-promises or
446 if your version doesn't support that option. See option `cfengine-cf-promises'.
448 ** Delete Selection mode can now be used without `transient-mark-mode'.
452 *** `desktop-auto-save-timeout' defines the number of seconds idle time
453 before auto-save of the desktop.
455 *** `desktop-restore-frames', enabled by default, allows saving and
456 restoring the frame/window configuration (frameset). Additional options
457 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
458 and `desktop-restore-forces-onscreen' offer further customization.
461 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
462 such as file ownership or permissions, are visible.
464 ** Eldoc Mode works properly in the minibuffer.
466 ** Electric Pair mode
468 *** New option `electric-pair-preserve-balance', enabled by default.
469 If non-nil, pairing/skipping only kicks in when that help the balance
470 of parentheses and quotes, i.e. the buffer should end up at least as
473 You can further control this behavior by adjusting the predicates
474 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
476 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
477 In `electric-pair-mode', the commands `backward-delete-char' and
478 `backward-delete-char-untabify' are now bound to electric variants
479 that delete the closer when invoked between adjacent pairs.
481 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
482 In `electric-pair-mode', inserting a newline between adjacent pairs
483 opens an extra newline after point, which is indented if
484 `electric-indent-mode' is also set.
486 *** New option `electric-pair-skip-whitespace', enabled by default.
487 This controls if skipping over closing delimiters should jump over any
488 whitespace slack. Setting it to `chomp' makes it delete this
489 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
491 *** New variables control the pairing in strings and comments.
492 You can customize `electric-pair-text-pairs' and
493 `electric-pair-text-syntax-table' to tweak pairing behavior inside
494 strings and comments.
498 *** New option `epa-mail-aliases'.
499 You can set this to a list of alias expansions for keys to use
500 in `epa-mail-encrypt'.
502 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
503 that means: when one of the recipients of the message being encrypted
504 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
506 If one element of the variable's value is ("foo@bar.com"),
507 that means: when one of the recipients of the message being encrypted
508 is `foo@bar.com', ignore that name as regards encryption.
509 This is useful to avoid a query when you have no key for that name.
513 *** New option `erc-accidental-paste-threshold-seconds'.
514 If set to a number, this can be used to avoid accidentally pasting large
515 amounts of data into the ERC input.
518 ** New ERT macro `skip-unless' allows skipping ERT tests.
519 See the ERT manual for details.
524 *** `eshell' now supports visual subcommands and options.
525 Eshell has been able to handle "visual" commands (interactive,
526 non-line oriented commands such as top that require display
527 capabilities not provided by eshell) by running them in an Emacs
528 terminal emulator. See `eshell-visual-commands'.
530 This feature has been extended to subcommands and options that make a
531 usually line-oriented command a visual command. Typical examples are
532 "git log" and "git <command> --help", which display their output in a
533 pager by default. See `eshell-visual-subcommands' and
534 `eshell-visual-options'.
537 *** New Eshell-Tramp module.
538 External su and sudo commands are now the default; the internal,
539 Tramp-using variants can still be used by enabling the eshell-tramp
544 *** New option `f90-smart-end-names'.
546 ** Icomplete is a bit more like Ido.
548 *** Key bindings to navigate through and select the completions.
550 *** The icomplete-separator is customizable, and its default has changed.
552 *** Removed `icomplete-show-key-bindings'.
554 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
555 (setq icomplete-with-completion-tables '(internal-complete-buffer))
556 will revert to the old behavior.
560 *** Ido has a manual now.
562 *** `ido-use-virtual-buffers' takes a new value 'auto.
564 *** `ido-decorations' has been slightly extended to give a bit more control.
569 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
570 visit the next image file and the previous image file in the same
571 directory, respectively.
574 *** New commands to show specific frames of multi-frame images.
575 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
576 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
579 *** New commands to speed up, slow down, or reverse animation.
580 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
581 speed up and slow down the animation. `a r' (`image-reverse-speed')
582 to reverse it and `a 0' (`image-reset-speed') to reset it.
585 *** The command `image-mode-fit-frame' deletes other windows.
586 When toggling, it restores the frame's previous window configuration.
587 It also has an optional frame argument, which can be used by Lisp
588 callers to fit the image to a frame other than the selected frame.
592 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
593 will cycle through faces in `hi-lock-face-defaults' without prompting.
596 *** New global command `M-s h .' (`highlight-symbol-at-point')
597 highlights the symbol found near point without prompting,
598 using the next face automatically.
600 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
603 ** New Info face `info-index-match', used to highlight matches in index
604 entries displayed by `Info-index-next', `Info-virtual-index' and
610 *** New option `js-switch-indent-offset'.
613 *** Better indentation of multiple-variable declarations.
614 If a declaration spans several lines, variables on the following lines
615 are lined up to the first one.
618 *** Recognition and better indentation of continuations in array comprehensions.
621 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
626 *** Font locking for texinfo comments and new keywords.
628 *** Completion in Octave file buffers.
632 *** Jump to definition.
634 *** Documentation lookup/search.
637 ** OPascal mode is the new name for Delphi mode
640 *** All delphi-* variables and functions have been renamed to opascal-*.
641 Obsolete aliases exist for those likely to have been used externally.
644 *** The option `delphi-newline-always-indents' has been removed.
645 Use `electric-indent-mode' instead.
648 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
652 *** The format of `archive-contents' files, generated by package
653 repositories, has changed to allow a new (fifth) element in the data
654 vectors, containing an associative list with extra properties.
656 *** `describe-package' buffer uses the `:url' extra property to
657 display a `Homepage' header, if it's present.
659 *** In the buffer produced by `describe-package', there are now buttons
660 listing the keywords related to that package. You can click on them
661 to see other packages related to any given keyword.
663 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
664 the packages by a keyword.
667 ** In Prolog mode, `prolog-use-smie' has been removed,
668 along with the non-SMIE indentation code.
672 *** The new command `remember-notes' creates a buffer that is saved on
673 `kill-emacs'. You can think of it as a *scratch* buffer whose content
674 is preserved. In fact, it was designed as a replacement for *scratch*
675 buffer and can be used that way by setting `initial-buffer-choice' to
676 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
677 Without the second change, the *scratch* buffer will still be there
678 for notes that do not need to be preserved.
680 *** The Remember package can now store notes in separates files.
681 You can use the new function `remember-store-in-files' within the
682 `remember-handler-functions' option. See `remember-data-directory'
683 and `remember-directory-file-name-format' for new options related to
688 *** Customize `rmail-mbox-format' to influence some minor aspects of
689 how Rmail displays non-MIME messages.
692 *** The `unrmail' command now converts from BABYL to mboxrd format,
693 rather than mboxo. Customize `unrmail-mbox-format' to change this.
698 *** Improved syntax highlighting and indentation.
701 *** New `electric-indent-mode' integration.
704 *** New option `ruby-encoding-magic-comment-style'.
707 *** New option `ruby-custom-encoding-magic-comment-template'.
710 *** New option `ruby-align-to-stmt-keywords'.
713 *** More Ruby file types have been added to `auto-mode-alist'.
715 ** Search and Replace
718 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
719 starts a symbol (identifier) incremental search forward with the
720 symbol found near point added to the search string initially.
723 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
724 and adds it to the search string.
726 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
727 between nil and the value of the option `search-invisible' (or `open'
730 *** `query-replace' skips invisible text when `search-invisible' is nil,
731 and opens overlays with hidden text when `search-invisible' is `open'.
734 *** A negative prefix arg of replacement commands replaces backward.
735 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
736 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
739 *** By default, prefix arguments do not now terminate Isearch mode.
740 Set `isearch-allow-prefix' to nil to restore old behavior.
743 *** More Isearch commands accept prefix arguments, namely
744 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
748 *** Word search now matches whitespace at the beginning/end
749 of the search string if it contains leading/trailing whitespace.
750 In an incremental word search or when using a non-nil LAX argument
751 of `word-search-regexp', the lax matching can also match part of
752 the first word (in addition to the lax matching of the last word).
753 The same rules are now applied to the symbol search with the difference
754 that it matches symbols, and non-symbol characters between symbols.
757 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
760 ** The shell.el option `explicit-bash-args' includes --noediting by default.
761 All non-ancient Bash versions support this option.
766 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
769 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
771 ** SMIE indentation can be customized via `smie-config'.
772 Emacs can learn the appropriate indentation settings if you provide it
773 with an indented sample file.
776 ** New Term mode option `term-suppress-hard-newline'.
779 ** Todo mode has been rewritten and enhanced.
780 The Todo mode user manual describes all commands and most user
781 options. To support some of these features, a new file format is
782 used, which is incompatible with the old format; however, you can
783 convert old todo and done item files to the new format on initializing
784 the first new todo file, or at any later time with the provided
785 conversion command. The previous version of todo-mode.el has been
786 renamed to otodo-mode.el and is now obsolete. New features include:
788 *** Support for multiple todo files and archive files of done items.
790 *** Renaming, reordering, moving, merging, and deleting categories.
792 *** Sortable tabular summaries of categories and the item types they contain.
794 *** Cross-category lists of items filtered by specific criteria.
796 *** More fine-grained interaction with the Emacs diary, by being able to
797 decide for each todo item whether it appears in the Fancy Diary display.
799 *** Highly flexible new item insertion and item editing.
801 *** Moving items between categories, storing done items in their category
802 or in archive files, undoing or unarchiving done items.
804 *** Reprioritizing items by inputting a numerical priority.
806 *** Extensive customizability of operation and display, including many faces.
810 *** No prompting for the destination buffer, unless a prefix argument is used.
812 *** With a prefix argument, you can enter a "context"; i.e., a Lisp
813 expression whose value at the time the function is entered/exited will
814 be printed along with the function name and arguments. For example,
815 you can use this to trace the value of current-buffer or point.
819 *** The experimental url syntax for remote file names has been removed.
822 *** New connection method "adb", which allows to access Android
823 devices by the Android Debug Bridge. The variable `tramp-adb-program'
824 can be used to adapt the path of the "adb" program, if needed.
826 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
827 "scpc" and "rsyncc" are discontinued. The ssh option
828 "ControlMaster=auto" is set automatically in all ssh-based methods,
832 *** Handlers for `file-acl' and `set-file-acl' for remote machines
833 which support POSIX ACLs.
836 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
837 for remote machines which support filesystem notifications.
839 ** New command `url-cookie-list' displays all the current cookies, and
840 allows deleting selected cookies.
842 ** VC and related modes
845 *** In VC directory mode, `D' displays diffs between VC-controlled
846 whole tree revisions.
849 *** In VC directory mode, `L' lists the change log for the current VC
850 controlled tree in a window.
853 *** In VC directory mode, `I' shows a log of changes that will be
854 received with a pull operation.
857 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
858 under current version control system. When called with a prefix
859 argument, you can remove a file from the ignored file list.
864 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
867 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
870 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
871 are obsolete. Customize the `woman-*' faces instead.
875 *** Iswitchb is made obsolete by icomplete-mode.
877 *** longlines.el is obsolete; use visual-line-mode instead.
883 *** terminal.el is obsolete; use term.el instead.
886 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
889 *** xesam.el is obsolete, because the XESAM project has been canceled.
892 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
895 *** The Info-edit command is obsolete. Editing Info nodes by hand
896 has not been relevant for some time.
899 * New Modes and Packages in Emacs 24.4
902 ** New package `eww' is a built-in web browser.
903 It is only available if Emacs is compiled with libxml2 support.
905 ** New minor mode `superword-mode'.
906 This overrides the default word motion commands to treat "symbol_words"
907 as a single word, similar to what `subword-mode' does.
910 ** New package nadvice.el offers lighter-weight advice facilities.
913 *** add-function/remove-function, which can be used to add/remove code on any
914 function-carrying place, such as process-filters or `<foo>-function' hooks.
916 *** advice-add/advice-remove to add/remove a piece of advice on a named
917 function,much like `defadvice' does.
919 ** New package frameset.el.
920 It provides a set of operations to save a frameset (the state of all
921 or a subset of the existing frames and windows, somewhat similar to a
922 frame configuration), both in-session and persistently, and restore it
923 at some point in the future.
926 ** New package filenotify.el provides an interface for file system
927 notifications. It requires that Emacs be compiled with one of the
928 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
931 * Incompatible Lisp Changes in Emacs 24.4
934 ** `kill-region' has lost its `yank-handler' optional argument.
937 ** `(input-pending-p)' no longer runs other timers that are ready to run.
938 The new optional CHECK-TIMERS parameter allows for the prior behavior.
941 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
944 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
945 Some languages match those as »...«, and others as «...», so it is
946 better for Emacs to stay neutral by default.
949 ** In compiled Lisp files, the header no longer includes a timestamp.
952 ** The default file coding for Emacs Lisp files is now utf-8.
953 (See `file-coding-system-alist'.) In most cases, this change is
954 transparent, but files that contain unusual characters without
955 specifying an explicit coding system may fail to load with obscure
956 errors. You should either convert them to utf-8 or add an explicit
960 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
961 It used to disable the minor mode, major mode, and text-property keymaps,
962 whereas now it simply has higher precedence.
964 ** Default process filters and sentinels are not nil any more.
965 Instead they default to a function that does what the nil value used to do.
968 ** `read-event' does not return decoded chars in ttys any more.
969 As was the case in Emacs 22 and before, the decoding of terminal
970 input, according to `keyboard-coding-system', is not performed in
971 `read-event' any more. But unlike in Emacs 22, this decoding is still
972 done before input-decode-map, function-key-map, etc.
975 ** The option `inhibit-local-menu-bar-menus' has been removed.
978 ** Frame-local variables that affect redisplay do not work any more.
979 More specifically, redisplay does not bother to check for a frame-local
980 value when looking up variables.
983 ** nil and "unbound" are indistinguishable in `symbol-function'.
984 `symbol-function' does not signal a `void-function' error any more.
985 To determine if a symbol's function definition is void, use `fboundp'.
988 ** `defadvice' does not honor the `freeze' flag and cannot advise
989 special-forms any more.
992 ** `dolist' no longer binds VAR while evaluating the RESULT form,
993 when lexical binding is enabled. Previously, VAR was bound to nil,
994 which often led to spurious unused-variable warnings.
997 ** The return value of `backup-buffer' has changed.
998 The second argument is no longer an SELinux context, instead it is an
999 alist of extended attributes as returned by the new function
1000 `file-extended-attributes'. The attributes can be applied to another
1001 file using `set-file-extended-attributes'.
1004 ** By default `copy-file' no longer copies file permission bits to an
1005 existing destination; and it sets the file permission bits of a newly
1006 created destination to those of the source, masked by the default file
1007 permissions. To copy the file permission bits, pass t as the
1008 PRESERVE-PERMISSIONS argument of `copy-file'.
1011 ** `visited-file-modtime' now returns -1 for nonexistent files.
1012 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1013 in the presence of files with negative time stamps.
1016 ** The cars of the elements in `interpreter-mode-alist' are now
1017 treated as regexps rather than literal strings.
1020 * Lisp Changes in Emacs 24.4
1023 ** The second argument of `eval' can now specify a lexical environment.
1026 ** New functions `special-form-p' and `macrop'.
1028 ** New macro `define-alternatives' can be used to define generic commands.
1029 Generic commands are interactive functions whose implementation can be
1030 selected among several alternatives, as a matter of user preference.
1032 ** The `defalias-fset-function' property lets you catch `defalias'
1033 calls, and redirect them to your own function, instead of `fset'.
1036 ** New variable `enable-dir-local-variables'.
1037 Directory-local variables are ignored if this is nil. This may be
1038 useful for modes that want to ignore directory-locals while still
1039 respecting file-local variables.
1042 ** New function `get-pos-property'.
1044 ** Completion changes
1046 *** The separator for `completing-read-multiple' can now be a regexp.
1047 The default separator has been changed to allow surrounding spaces
1050 *** The `common-substring' arg of `display-completion-list' is obsolete.
1051 Either use `completion-all-completions', which returns highlighted
1052 strings (including for partial or substring completion), or call
1053 `completion-hilit-commonality' to add the highlight.
1055 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1056 let you enable symbol prettification (replacing a string like "lambda" with
1057 the Greek lambda character).
1062 *** Functions to pop up menus and dialogs now work on all terminals,
1063 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1064 `message-box', `yes-or-no-p', etc.
1066 The function `display-popup-menus-p' will now return non-nil for a
1067 display or frame whenever a mouse is supported on that display or
1070 *** New hook `tty-setup-hook'.
1074 *** New display action function `display-buffer-no-window' to not
1075 display the buffer in a window.
1077 *** New display action alist entry `allow-no-window' to indicate the
1078 caller of `display-buffer' is ready to handle the case of not
1079 displaying the buffer in a window.
1081 ** New hook `pre-redisplay-function'.
1084 ** New bool-vector set operation functions
1085 *** `bool-vector-exclusive-or'
1086 *** `bool-vector-union'
1087 *** `bool-vector-intersection'
1088 *** `bool-vector-set-difference'
1089 *** `bool-vector-not'
1090 *** `bool-vector-subsetp'
1091 *** `bool-vector-count-consecutive'
1092 *** `bool-vector-count-population'
1095 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1097 ** Error-handling changes
1100 *** New function `define-error'.
1103 *** `with-demoted-errors' takes an additional argument `format'.
1106 ** New macro `with-eval-after-load'.
1107 This is like the old `eval-after-load', but better behaved.
1110 ** New library subr-x.el with miscellaneous small utility functions
1111 *** `hash-table-keys'
1112 *** `hash-table-values'
1113 *** `string-blank-p'
1114 *** `string-empty-p'
1116 *** `string-reverse'
1117 *** `string-trim-left'
1118 *** `string-trim-right'
1120 *** `string-remove-prefix'
1121 *** `string-remove-suffix'
1124 ** Obsoleted functions
1127 *** `lisp-complete-symbol'
1128 *** `field-complete'
1129 *** `minibuffer-completion-contents'
1130 *** `isearch-nonincremental-exit-minibuffer'
1131 *** `isearch-filter-visible'
1132 *** `generic-make-keywords-list'
1133 *** `get-upcase-table' (use `case-table-get-table' instead).
1135 ** `with-wrapper-hook' is obsoleted by `add-function'.
1136 The few hooks that used with-wrapper-hook are replaced as follows:
1137 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1138 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1139 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1142 ** `byte-compile-interactive-only-functions' is now obsolete.
1143 To specify that a command should only be called interactively, give it
1144 a non-nil `interactive-only' property.
1147 ** `split-string' now takes an optional argument TRIM.
1148 The value, if non-nil, is a regexp that specifies what to trim from
1149 the start and end of each substring.
1152 ** New function `string-suffix-p'.
1154 ** File-handling changes
1157 *** Support for filesystem notifications.
1158 Emacs now supports notifications of filesystem changes, such as
1159 creation, modification, and deletion of files. This requires the
1160 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1161 MS-Windows systems, this is supported for Windows XP and newer
1165 *** The 9th element returned by `file-attributes' is now unspecified.
1166 Formerly, it was t if the file's gid would change if file were deleted
1167 and recreated. This value has been inaccurate for years on many
1168 platforms, and nobody seems to have noticed or cared.
1171 *** The 6th argument to `copy-file' has been renamed to
1172 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1173 Unix file permission bits as well as SELinux context.
1176 *** The function `file-ownership-preserved-p' now has an optional
1177 argument GROUP which causes it check for file group too. This can be
1178 used in place of the 9th element of `file-attributes'.
1181 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1182 argument, with the same interpretation as the returned value of
1183 `visited-file-modtime'.
1185 ** Autorevert changes
1188 *** If Emacs is compiled with file notification support, notifications
1189 are used instead of checking the time stamp of the files. You can
1190 disable this by setting the user option `auto-revert-use-notify' to
1191 nil. Alternatively, a regular expression of directories to be
1192 excluded from file notifications can be specified by
1193 `auto-revert-notify-exclude-dir-regexp'.
1196 *** The new user option `auto-revert-remote-files' enables reversion
1197 of remote files when set to non-nil.
1201 *** The function `face-spec-set' is now like `setq' for face specs.
1202 Its third arg now accepts values specifying a face spec type (defface,
1203 custom, or override spec), and the relevant spec is set accordingly.
1206 *** New function `add-face-text-property', which can be used to
1207 conveniently prepend/append new face properties.
1209 *** Face specs set via Custom themes now replace the `defface' spec
1210 rather than inheriting from it (as do face specs set via Customize).
1212 *** New face characteristic (supports :underline (:style wave))
1213 specifies whether or not the terminal can display a wavy line.
1216 *** New face spec attribute :distant-foreground
1217 specifies foreground to use if background color is near the foreground
1218 color that would otherwise have been used.
1223 *** `image-animated-p' is now `image-multi-frame-p'.
1224 It returns non-nil for any image that contains multiple frames,
1225 whether or not it specifies a frame delay.
1228 *** New variable `image-default-frame-delay' gives the frame delay for
1229 animated images which do not specify a frame delay.
1232 *** New functions `image-current-frame' and `image-show-frame' for getting
1233 and setting the current frame of a multi-frame image.
1238 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1239 **** object-name -> eieio-object-name
1240 **** object-class -> eieio-object-class
1241 **** object-class-fast -> eieio--object-class
1242 **** object-class-name -> eieio-object-class-name
1243 **** object-name-string -> eieio-object-name-string
1244 **** object-num-slots -> eieio--object-num-slots
1245 **** object-set-name-string -> eieio-object-set-name-string
1246 **** class-of -> eieio-object-class
1247 **** class-name -> eieio-class-name
1248 **** class-parent -> eieio-class-parent
1249 **** class-parents -> eieio-class-parents
1250 **** class-parents-fast -> eieio-class-parents-fast
1251 **** class-children -> eieio-class-children
1252 **** class-num-slots -> eieio--class-num-slots
1253 **** class-precedence-list -> eieio-class-precedence-list
1254 **** class-direct-subclasses -> eieio-class-children
1255 **** class-direct-superclasses -> eieio-class-parents
1257 ** Changes in encoding and decoding of text
1260 *** New coding-system `prefer-utf-8'.
1261 This is like `undecided' but prefers UTF-8 on decoding if the text to
1262 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1263 any non-ASCII characters are automatically encoded as UTF-8.
1266 *** New attributes of coding-systems whose type is `undecided'.
1267 Two new attributes, `:inhibit-null-byte-detection' and
1268 `:inhibit-iso-escape-detection', determine how to detect encoding of
1269 text that includes null bytes and ISO-2022 escape sequences,
1270 respectively. Each of these attributes can be either nil, zero, or
1271 t. If it is t, decoding text ignores null bytes and, respectively,
1272 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1273 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1274 text is encoded in one of the ISO-2022 encodings, such as
1275 iso-2022-7bit. If the value is zero, Emacs consults the variables
1276 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1278 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1279 UTF-8 encoding and decoding, whenever possible.
1281 These attributes are only meaningful for coding-systems of type
1282 `undecided'. (The type of a coding-system is determined by its
1283 `:coding-type' attribute and can be accessed by calling the
1284 `coding-system-type' function.)
1287 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1290 ** New functions `group-gid' and `group-real-gid'.
1293 ** The spelling of the rx.el category `chinese-two-byte' has been
1294 corrected (the first 'e' was missing).
1297 ** Minor internal changes to the details of lock files.
1298 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1299 If DIR/.#FILE already exists and is not an Emacs lock file,
1300 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1301 numbered lock files DIR/.#FILE.0...).
1302 On file systems that do not support symbolic links, the lock is now a
1303 regular file with contents being what would have been in the symlink.
1305 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1308 *** The package descriptor and name of global variables, constants,
1309 and functions should be separated by two hyphens if the symbol is not
1310 meant to be used by other packages.
1313 * Changes in Emacs 24.4 on Non-Free Operating Systems
1316 ** The procedure for building Emacs on MS-Windows has changed.
1317 It is now built by running the same configure script as on all other
1318 platforms. This requires the MSYS environment and MinGW development
1319 tools. See the updated instructions in nt/INSTALL for details.
1321 Using the Posix configure script and Makefile's also means a change in
1322 the directory structure of the Emacs installation on Windows. It is
1323 now the same as on GNU and Unix systems. In particular, the auxiliary
1324 programs, such as cmdproxy.exe and hexl.exe, are in
1325 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1326 version), version-independent site-lisp is in share/emacs/site-lisp,
1327 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1328 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1329 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1330 directories and will find the files in there automatically; there's no
1331 need to set any variables due to this change.)
1334 ** Emacs on Windows 2000 and later can now access files and directories
1335 whose names cannot be encoded in the current system codepage.
1337 The new variable `w32-unicode-filenames' controls this feature: if it
1338 is t, Emacs uses Unicode APIs to pass file names to system calls,
1339 which lifts the limitation of file names to the current locale.
1342 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1343 The backtrace is written to the 'emacs_backtrace.txt' file in the
1344 directory where Emacs was running.
1347 ** The variable `buffer-file-type' is no longer supported.
1348 Setting it has no effect, and %t in the mode-line format is ignored.
1349 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1350 modifying it has no effect.
1353 ** Lock files now work on MS-Windows.
1354 This helps to prevent losing your edits if the same file is being
1355 edited in another Emacs session or by another user. See the node
1356 "Interlocking" in the Emacs User Manual for the details. To disable
1357 file locking, customize `create-lockfiles' to nil.
1359 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1360 GNUstep and Mac OS X 10.4 use the old font backend.
1361 To use the old backend by default, do on the command line:
1362 % defaults write org.gnu.Emacs FontBackend ns
1364 ** Improved fullscreen support on Mac OS X.
1365 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1366 Customize `ns-use-native-fullscreen' to change the style.
1367 For Mac OS X 10.7 and newer, native is the default.
1369 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1370 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1371 does not apply to images.
1374 * Installation Changes in Emacs 24.3
1376 ** The default X toolkit is now Gtk+ version 3.
1377 If you don't pass `--with-x-toolkit' to configure, or if you use
1378 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1379 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1380 You can explicitly require a specific version by passing
1381 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1383 ** New configure option `--enable-link-time-optimization', to utilize
1384 an appropriate feature provided by GCC since version 4.5.0.
1386 ** New configure option `--without-all' to disable most of the optional
1387 features (image support, etc.) that are normally enabled by default.
1389 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1390 Emacs). If building with GCC, this enables compile-time checks that
1391 warn/give errors about possibly-questionable C code. On a recent GNU
1392 system there should be no warnings; on older and on non-GNU systems
1393 the results may be useful to developers.
1395 ** The configure option `--enable-use-lisp-union-type' has been
1396 renamed to `--enable-check-lisp-object-type', as the resulting
1397 Lisp_Object type no longer uses a union to implement the compile time
1398 check that this option enables.
1400 ** The configure option `--disable-maintainer-mode' has been removed,
1401 as it was confusingly-named and rarely useful.
1403 ** The configure options `--program-prefix', `--program-suffix', and
1404 `--program-transform-name' apply to more than just the installed
1405 binaries. Now they also affect the man pages, icons, and the
1406 etc/emacs.desktop file; but not the info pages, since this would break
1407 links between the various manuals.
1409 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1410 overwriting "emacs" in the installation bin/ directory with a link
1413 ** Emacs uses libtinfo in preference to libncurses, if available.
1415 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1416 /usr/pkg/lib to the linker search path. You must add them yourself if
1419 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1420 (from the bin and libexec directories, respectively). The former is
1421 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1424 * Startup Changes in Emacs 24.3
1426 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1427 lisp/ directory. There should not be any there anyway. If you have
1428 been adding them there, put them somewhere else; e.g., site-lisp.
1430 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1433 * Changes in Emacs 24.3
1437 *** `C-h f' (`describe-function') can now perform autoloading.
1438 When this command is called for an autoloaded function whose docstring
1439 contains a key substitution construct, that function's library is
1440 automatically loaded, so that the documentation can be shown
1441 correctly. To disable this, set `help-enable-auto-load' to nil.
1443 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1444 even after their associated libraries have been loaded (and the
1445 autoloads have been redefined as functions).
1449 *** Images displayed via ImageMagick now support transparency and the
1450 :background image specification property.
1452 *** When available, ImageMagick support is automatically enabled.
1453 It is no longer necessary to call `imagemagick-register-types'
1454 explicitly to install ImageMagick image types; that function is called
1455 automatically at startup, or when customizing an imagemagick- option.
1457 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1458 ImageMagick to view images. (You must call `imagemagick-register-types'
1459 afterwards if you do not use customize to change this.)
1461 *** The new variable `imagemagick-enabled-types' also affects which
1462 ImageMagick types are treated as images. The function
1463 `imagemagick-filter-types' returns the list of types that will be
1468 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1469 next and previous path separator, respectively.
1471 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1472 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1473 non-nil before enabling the mode.
1477 *** New option `mode-line-default-help-echo' specifies the help text
1478 (shown in a tooltip or in the echo area) for any part of the mode line
1479 that does not have its own specialized help text.
1481 *** You can now click mouse-3 in the coding system indicator to invoke
1482 `set-buffer-file-coding-system'.
1484 ** Server and client
1486 *** emacsclient now obeys string values for `initial-buffer-choice',
1487 if it is told to open a new frame without specifying any file to visit
1488 or expression to evaluate.
1490 *** New option `server-auth-key' specifies a shared server key.
1492 ** Emacs now generates backtraces on fatal errors.
1493 On encountering a fatal error, Emacs now outputs a textual description
1494 of the fatal signal, and a short backtrace on platforms like glibc
1495 that support backtraces.
1497 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1498 This minor mode replaces `toggle-read-only', which is now obsolete.
1500 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1501 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1502 respectively, without exiting from the prompt.
1504 ** In the Package Menu, newly-available packages are listed as "new",
1505 and sorted above the other "available" packages by default.
1507 ** If your Emacs was built from a repository checkout, the new variable
1508 `emacs-bzr-version' contains information about the bzr revision used.
1510 ** New option `create-lockfiles' specifies usage of lockfiles.
1511 It defaults to t. Changing it to nil inhibits the creation of lock
1512 files (use this with caution).
1514 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1515 variables on remote hosts.
1517 ** The entry for PCL-CVS has been removed from the Tools menu.
1518 The PCL-CVS commands are still available via the keyboard.
1520 ** Using "unibyte: t" in Lisp source files is obsolete.
1521 Use "coding: raw-text" instead.
1523 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1524 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1525 The previous binding, introduced in Emacs 24.1, was a mistake, because
1526 `C-c LETTER' bindings are reserved for user customizations.
1528 ** Internationalization
1530 *** New language environment: Persian.
1532 *** New input method `vietnamese-vni'.
1534 ** Nextstep (GNUstep / Mac OS X) port
1536 *** Support for fullscreen and the frame parameter fullscreen.
1538 *** A file dialog is used for open/save operations initiated from the
1542 * Editing Changes in Emacs 24.3
1544 ** Search and Replace
1546 *** Non-regexp Isearch now performs "lax" space matching.
1547 Each sequence of spaces in the supplied search string may match any
1548 sequence of one or more whitespace characters, as specified by the
1549 variable `search-whitespace-regexp'. (This variable is also used by a
1550 similar existing feature for regexp Isearch.)
1552 *** New Isearch command `M-s SPC' toggles lax space matching.
1553 This applies to both ordinary and regexp Isearch.
1555 *** New option `replace-lax-whitespace'.
1556 If non-nil, `query-replace' uses flexible whitespace matching too.
1559 *** Global `M-s _' starts a symbol (identifier) incremental search,
1560 and `M-s _' in Isearch toggles symbol search mode.
1561 `M-s c' in Isearch toggles search case-sensitivity.
1563 ** Navigation commands
1565 *** New binding `M-g c' for `goto-char'.
1567 *** New binding `M-g TAB' for `move-to-column'.
1569 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1570 interactively with no prefix arg. Previously, it moved to column 1.
1572 ** New option `yank-handled-properties' allows processing of text
1573 properties on yanked text, in ways that are more general than just
1574 removing them (as is done by `yank-excluded-properties').
1576 ** New option `delete-trailing-lines' specifies whether
1577 M-x delete-trailing-whitespace should delete trailing lines at the end
1578 of the buffer. It defaults to t.
1580 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1582 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1583 `ucs-insert' is now an obsolete alias for `insert-char'.
1585 ** The `z' key no longer has a binding in most special modes.
1586 It used to be bound to `kill-this-buffer', but `z' is too easy to
1589 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1590 It copies the region-rectangle as the last rectangle kill.
1594 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1596 *** New option `register-separator' specifies the register containing
1597 the text to put between collected texts for use with
1598 M-x append-to-register and M-x prepend-to-register.
1601 * Changes in Specialized Modes and Packages in Emacs 24.3
1603 ** Common Lisp emulation (CL)
1605 *** CL's main entry is now (require 'cl-lib).
1606 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1607 i.e., all its definitions have the "cl-" prefix (and internal definitions
1608 use the "cl--" prefix).
1610 If `cl' provided a feature under the name `foo', then `cl-lib'
1611 provides it under the name `cl-foo' instead; with the exceptions of the
1612 few `cl' definitions that had to use `foo*' to avoid conflicts with
1613 pre-existing Elisp entities. These have been renamed to `cl-foo'
1614 rather than `cl-foo*'.
1616 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1617 provide the old, non-prefixed names. Some exceptions are listed below:
1619 *** `cl-flet' is not like `flet' (which is deprecated).
1620 Instead it obeys the behavior of Common-Lisp's `flet'.
1621 In particular, in cl-flet function definitions are lexically scoped,
1622 whereas in flet the scoping is dynamic.
1624 *** `cl-labels' is slightly different from `labels'.
1625 The difference is that it relies on the `lexical-binding' machinery
1626 (as opposed to the `lexical-let' machinery used previously) to capture
1627 definitions in closures, so such closures will only work if `lexical-binding'
1630 *** `cl-letf' is not exactly like `letf'.
1631 The only difference is in details that relate to some deprecated usage
1632 of `symbol-function' in place forms.
1634 *** `progv' was rewritten to use the `let' machinery.
1635 A side effect is that variables without corresponding values are bound
1636 to nil rather than being made unbound.
1638 *** The following methods of extending `setf' are obsolete
1639 (use features from gv.el instead):
1640 `define-modify-macro' (use `gv-letplace')
1641 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1642 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1643 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1647 *** Changes are now highlighted using the same color scheme as in
1648 modern VCSes. Deletions are displayed in red (new faces
1649 `diff-refine-removed' and `smerge-refined-removed', and new definition
1650 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1651 and `smerge-refined-added', and new definition of `diff-added').
1653 *** The variable `diff-use-changed-face' defines whether to use the
1654 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1655 changes in context diffs.
1657 *** The new command `diff-delete-trailing-whitespace' removes trailing
1658 whitespace introduced by a diff.
1660 ** Ediff now uses the same color scheme as Diff mode.
1664 A new version of python.el, which provides several new features, including:
1665 per-buffer shells, better indentation, Python 3 support, and improved
1666 shell-interaction compatible with iPython (and virtually any other
1669 *** Some user options have been replaced/renamed, including (old -> new):
1670 **** python-indent -> python-indent-offset
1671 **** python-guess-indent -> python-indent-guess-indent-offset
1672 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1673 **** python-use-skeletons -> python-skeleton-autoinsert
1675 *** Some user options have been removed, including:
1677 **** `python-indent-string-contents': Strings are never indented.
1679 **** `python-honour-comment-indentation':
1680 Comments are always considered as indentation markers.
1682 **** `python-continuation-offset': Indentation is automatically
1683 calculated in a pep8 compliant way depending on the context.
1685 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1686 Have no direct mapping as the shell interaction is completely different.
1688 **** `python-python-command', `python-jython-command':
1689 Replaced by `python-shell-interpreter'.
1691 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1692 `python-pdbtrack-minor-mode-string', `python-source-modes':
1695 *** Some commands have been replaced (old -> new):
1696 **** python-insert-class -> python-skeleton-class
1697 **** python-insert-def -> python-skeleton-def
1698 **** python-insert-for -> python-skeleton-for
1699 **** python-insert-if -> python-skeleton-if
1700 **** python-insert-try/except -> python-skeleton-try
1701 **** python-insert-try/finally -> python-skeleton-try
1702 **** python-insert-while -> python-skeleton-while
1703 **** python-find-function -> python-nav-jump-to-defun
1704 **** python-next-statement -> python-nav-forward-sentence
1705 **** python-previous-statement -> python-nav-backward-sentence
1706 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1707 **** python-end-of-defun-function -> python-nav-end-of-defun
1708 **** python-send-buffer -> python-shell-send-buffer
1709 **** python-send-defun -> python-shell-send-defun
1710 **** python-send-region -> python-shell-send-region
1711 **** python-send-region-and-go -> emulate with python-shell-send-region
1712 and python-shell-switch-to-shell
1713 **** python-send-string -> python-shell-send-string
1714 **** python-switch-to-python -> python-shell-switch-to-shell
1715 **** python-describe-symbol -> python-eldoc-at-point
1719 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1721 *** The D-Bus object manager interface is implemented.
1723 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1724 if their value does not fit into Emacs's integer range.
1726 *** The function `dbus-call-method' is now non-blocking.
1727 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1729 *** Signals can also be sent as unicast messages.
1731 *** The argument list of `dbus-register-signal' has been extended,
1732 according to the new match rule types of D-Bus.
1734 *** `dbus-init-bus' supports private connections.
1736 *** There is a new function `dbus-setenv'.
1738 ** `desktop-path' no longer includes the "." directory.
1739 Desktop files are now located in ~/.emacs.d by default.
1743 *** `dired-do-async-shell-command' executes each file sequentially
1744 if the command ends in `;' (when operating on multiple files).
1745 Otherwise, it executes the command on each file in parallel.
1747 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1748 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1751 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1752 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1753 mark/unmark/flag all files in the active region.
1755 *** The minibuffer default for `=' (`dired-diff') has changed.
1756 It is now the backup file for the file at point, if one exists.
1757 In Transient Mark mode the default is the file at the active mark.
1759 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1760 The global binding for `M-=', `count-words-region' is in effect.
1764 *** New module "notifications", which can send a notification when you
1765 receive a private message or your nickname is mentioned.
1767 *** ERC will look up server/channel names via auth-source and use any
1770 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1771 only applies to messages sent by lurkers.
1773 ** reStructuredText mode
1775 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1776 fontification, comment handling, and customization have all been revised
1779 *** Support for `imenu' and `which-function-mode'.
1781 *** The reStructuredText syntax is more closely covered.
1782 Sphinx support has been improved.
1784 *** `rst-insert-list' inserts new list or continues existing lists.
1786 *** A negative prefix argument always works for `rst-adjust'.
1788 *** The window configuration is reset after displaying a TOC.
1790 *** The constant `rst-version' describes the rst.el package version.
1794 *** Support for percent literals and recognition of regular expressions
1795 in method calls without parentheses with more methods, including Cucumber
1798 *** Improved syntax highlighting and indentation.
1800 *** New command `ruby-toggle-block', bound to `C-c {'.
1802 *** Some non-standard keybindings/commands have been removed:
1804 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1806 **** `ruby-mark-defun'; use `mark-defun'.
1808 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1809 appropriate settings for the variables `beginning-of-defun-function'
1810 and `end-of-defun-function'.
1812 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1813 `reindent-then-newline-and-indent' and `newline' have been removed.
1815 ** Shell Script mode
1817 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1819 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1821 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1825 *** The free software compiler GHDL is supported (and now the default).
1827 *** Support for the VHDL-AMS packages has been added/updated.
1829 *** Updated to the 2002 revision of the VHDL standard.
1831 *** Accepts \r and \f as whitespace.
1835 *** The faces used by Apropos are now directly customizable.
1836 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1837 see the `apropos' Custom group for details.
1839 *** The old options whose values specified faces to use have been removed
1840 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1844 *** This package has been rewritten to use Tabulated List mode.
1846 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1847 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1851 *** Algebraic simplification mode is now the default.
1852 To restrict to the limited simplifications given by the former
1853 default simplification mode, use `m I'.
1857 *** You can customize the header text that appears above each calendar month.
1858 See the variable `calendar-month-header'.
1860 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1862 *** The calendars produced by cal-html include holidays.
1863 Customize `cal-html-holidays' to change this.
1867 *** The major modes from the parser generators "Bovine" and "Wisent"
1868 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1869 are in `auto-mode-alist', and the corresponding manuals are included.
1873 **** Menu support for the "Configuration" feature. This allows users to
1874 choose the active configuration (such as debug or install) from the menu.
1876 **** New command `ede-set' to interactively set project-local variables.
1878 **** Support for compiling, debugging, and running in "generic" projects.
1880 **** Autoconf editing support for M4 macros with complex arguments.
1882 **** Compilation support for the "linux" project type.
1884 **** "simple" projects have been removed; use "generic" projects instead.
1888 **** Support for parsing #include statements inside a namespace in C/C++.
1890 **** Improved support for 'extern "C"' declarations in C/C++.
1892 **** The ability to ignore more common special C/C++ preprocessor symbols,
1893 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1894 If available, include cdefs.h as an additional source of preprocessor symbols.
1896 **** Improved C/C++ function pointer parsing.
1898 **** In Python, support for converting imports to include file names.
1900 **** Ability to dynamically determine the Python load path.
1902 **** Support for the Python 'WITH' and 'AT' keywords.
1904 **** Improved tooltip completion.
1908 **** The SRecode manual is now included.
1910 **** Tag generation supports constructor/destructor settings and system
1911 include differentiation.
1913 **** Addition of 'Framework' support: Frameworks are specified when a
1914 particular kind of library (such as Android) is needed in a common language
1917 **** Support for nested templates and let variables override based on priority.
1919 **** Support for merging tables from multiple related modes, such as
1920 default -> c++ -> arduino.
1922 ** Compile has a new option `compilation-always-kill'.
1926 *** `custom-reset-button-menu' now defaults to t.
1928 *** Non-option variables are never matched in `customize-apropos' and
1929 `customize-apropos-options' (i.e., the prefix argument does nothing for
1930 these commands now).
1934 *** The variables `term-default-fg-color' and `term-default-bg-color'
1935 are now deprecated in favor of the customizable face `term'.
1937 *** You can customize how to display ANSI terminal colors and styles
1938 by customizing the corresponding `term-color-<COLOR>',
1939 `term-color-underline' and `term-color-bold' faces.
1943 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1945 *** Remote processes are now also supported on remote MS-Windows hosts.
1949 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1950 Previously, this slot stored semicolon-separated attribute-value pairs
1951 appended to some imap URLs, but this is not compatible with RFC 3986.
1952 So now the `filename' slot stores the entire path and query components,
1953 and the `attributes' slot is always nil.
1955 *** New function `url-encode-url' for encoding a URI string.
1956 The `url-retrieve' function now uses this to encode its URL argument,
1957 in case that is not properly encoded.
1959 ** notifications.el supports now version 1.2 of the Notifications API.
1960 The function `notifications-get-capabilities' returns the supported
1963 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1964 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1965 `flymake-warning-bitmap'.
1967 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1968 specifying URL types that should be converted to remote file names at
1969 the FFAP prompt. The default is now '("ftp").
1971 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1972 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1974 ** New option `mouse-avoidance-banish-position' specifies where the
1975 `banish' mouse avoidance setting moves the mouse.
1977 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1978 closing brackets to be aligned with the line of the opening bracket.
1980 ** In Proced mode, new command `proced-renice' renices marked processes.
1982 ** New option `async-shell-command-buffer' specifies the buffer to use
1983 for a new asynchronous `shell-command' when the default output buffer
1984 `*Async Shell Command*' is already in use.
1986 ** SQL mode has a new option `sql-db2-escape-newlines'.
1987 If non-nil, newlines sent to the command interpreter will be escaped
1988 by a backslash. The default does not escape the newlines and assumes
1989 that the sql statement will be terminated by a semicolon.
1991 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1992 (and modes that derive from it), sorts the column at point, or the Nth
1993 column if a numeric prefix argument is given.
1995 ** `which-func-modes' now defaults to t, so Which Function mode, when
1996 enabled, applies to all applicable major modes.
1998 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2001 ** Follow mode no longer works by using advice.
2002 The option `follow-intercept-processes' has been removed.
2004 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2006 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2007 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2008 *** semantic-change-hooks -> semantic-change-functions
2009 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2010 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2011 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2012 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2013 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2014 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2015 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2016 *** rcirc-activity-hooks -> rcirc-activity-functions
2017 *** rcirc-print-hooks -> rcirc-print-functions
2018 *** dbus-event-error-hooks -> dbus-event-error-functions
2019 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2020 *** checkdoc-style-hooks -> checkdoc-style-functions
2021 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2022 *** archive-extract-hooks -> archive-extract-hook
2023 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2024 *** hfy-post-html-hooks -> hfy-post-html-hook
2025 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2026 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2027 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2028 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2030 ** Obsolete packages
2033 In most cases, assoc+member+push+delq work just as well.
2034 And in any case it's just a terrible package: ugly semantics, terrible
2035 inefficiency, and not namespace-clean.
2044 * Incompatible Lisp Changes in Emacs 24.3
2046 ** Docstrings starting with `*' no longer indicate user options.
2047 Only variables defined using `defcustom' are considered user options.
2048 The function `user-variable-p' is now an obsolete alias for
2049 `custom-variable-p'.
2051 ** The return values of `defalias', `defun' and `defmacro' have changed,
2052 and are now undefined. For backwards compatibility, `defun' and
2053 `defmacro' currently return the name of the newly defined
2054 function/macro, but this should not be relied upon.
2056 ** `random' by default now returns a different random sequence in
2057 every Emacs run. Use `(random S)', where S is a string, to set the
2058 random seed to a value based on S, in order to get a repeatable
2059 sequence in later calls.
2061 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2062 that substring is inserted literally even if the LITERAL arg is
2063 non-nil, instead of causing an error to be signaled.
2065 ** `select-window' now always makes the window's buffer current.
2066 It does so even if the window was selected before.
2068 ** The function `x-select-font' can return a font spec, instead of a
2069 font name as a string. Whether it returns a font spec or a font name
2070 depends on the graphical library.
2072 ** `face-spec-set' no longer sets frame-specific attributes when the
2073 third argument is a frame (that usage was obsolete since Emacs 22.2).
2075 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2077 ** The CL package's `get-setf-method' function no longer exists.
2078 Generalized variables are now part of core Emacs Lisp, and implemented
2079 differently to the way cl.el used to do it. It is not possible to
2080 define a compatible replacement for `get-setf-method'. See the file
2081 gv.el for internal details of the new implementation.
2083 ** The arguments of `dbus-register-signal' are no longer just strings,
2084 but keywords or keyword-string pairs. The old argument list will
2085 still be supported for Emacs 24.x.
2087 ** Miscellaneous name changes
2088 Some Lisp symbols have been renamed to correct their spelling,
2089 or to be more consistent with standard Emacs terminology.
2091 *** Renamed functions
2092 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2093 **** inactivate-input-method -> deactivate-input-method
2094 **** quail-inactivate -> quail-deactivate
2095 **** robin-inactivate -> robin-deactivate
2096 **** viper-inactivate-input-method -> viper-deactivate-input-method
2097 **** viper-inactivate-input-method-action ->
2098 viper-deactivate-input-method-action
2099 **** ucs-input-inactivate -> ucs-input-deactivate
2102 The old hooks are still supported for backward compatibility, but they
2103 are deprecated and will be removed eventually.
2104 **** input-method-inactivate-hook -> input-method-deactivate-hook
2105 **** robin-inactivate-hook -> robin-deactivate-hook
2106 **** quail-inactivate-hook -> quail-deactivate-hook
2108 *** Renamed variables
2109 **** follow-deactive-menu -> follow-inactive-menu
2110 **** inactivate-current-input-method-function ->
2111 deactivate-current-input-method-function
2113 ** Some obsolete functions, variables, and faces have been removed:
2114 *** `last-input-char', `last-command-char', `unread-command-char'
2115 *** `facemenu-unlisted-faces'
2116 *** `rmail-decode-mime-charset'
2117 *** `iswitchb-read-buffer'
2118 *** `sc-version', `sc-submit-bug-report'
2119 *** `set-char-table-default'
2120 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2121 *** `compile-internal'
2123 *** `mode-line-inverse-video'
2124 *** `follow-mode-off-hook'
2125 *** `cvs-commit-buffer-require-final-newline'
2126 (use `log-edit-require-final-newline' instead)
2127 *** `cvs-changelog-full-paragraphs'
2128 (use `log-edit-changelog-full-paragraphs' instead)
2129 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2130 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2131 *** `vc-master-templates' (use `vc-handled-backends' instead)
2132 *** `vc-checkout-carefully'
2135 * Lisp Changes in Emacs 24.3
2137 ** CL-style generalized variables are now in core Elisp.
2138 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2139 You can define your own generalized variables using `gv-define-simple-setter',
2140 `gv-define-setter', etc.
2142 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2143 This can significantly speed up execution of non-byte-compiled code,
2144 but can also bump into previously unnoticed cyclic dependencies.
2145 These are generally harmless: they will simply cause the macro calls
2146 to be left for later expansion (as before), but will result in a
2147 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2148 You may wish to restructure your code so this does not happen.
2150 ** New sampling-based Elisp profiler.
2151 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2152 When finished, use M-x profiler-stop. The sampling rate can be based on
2153 CPU time or memory allocations.
2155 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2156 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2158 ** New macros `setq-local' and `defvar-local'.
2160 ** Face underlining can now use a wave.
2162 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2163 of `read-regexp' accepts a string ending with a colon and space, and its
2164 second argument DEFAULTS can be a list of strings accessible via `M-n'
2165 in the minibuffer ahead of other hard-coded useful regexp-related values.
2166 More commands use `read-regexp' now to read their regexp arguments.
2170 *** New function `completion-table-with-quoting' to handle completion
2171 in the presence of quoting, such as file completion in shell buffers.
2173 *** New function `completion-table-subvert' to use an existing completion
2174 table, but with a different prefix.
2178 *** New error type and new function `user-error'.
2179 These do not trigger the debugger.
2181 *** New option `debugger-bury-or-kill', saying what to do with the
2182 debugger buffer when exiting debug.
2184 *** Set `debug-on-message' to enter the debugger when a certain
2185 message is displayed in the echo area. This can be useful when trying
2186 to work out which code is doing something.
2188 *** New var `inhibit-debugger', automatically set to prevent accidental
2189 recursive invocations.
2193 *** New command `fit-frame-to-buffer' adjusts the frame height to
2196 *** The command `fit-window-to-buffer' can adjust the frame height
2197 if the new option `fit-frame-to-buffer' is non-nil.
2199 *** New macro `with-temp-buffer-window', similar to
2200 `with-output-to-temp-buffer'.
2202 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2205 *** New option `switch-to-buffer-preserve-window-point' to restore a
2206 window's point when switching buffers.
2208 *** New display action alist entries `window-height' and `window-width'
2209 specify the size of new windows created by `display-buffer'.
2211 *** New display action alist entry `pop-up-frame-parameters', if
2212 non-nil, specifies frame parameters to give any newly-created frame.
2214 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2215 tells display action functions to avoid changing which frame is
2218 *** New display action alist entry `previous-window', if non-nil,
2219 specifies window to reuse in `display-buffer-in-previous-window'.
2221 *** New display action functions `display-buffer-below-selected',
2222 and `display-buffer-in-previous-window'.
2224 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2225 now accept a third argument to avoid choosing the selected window.
2227 *** Additional values recognized for option `window-combination-limit'.
2229 *** The following variables are obsolete, as they can be replaced by
2230 appropriate entries in the `display-buffer-alist' function introduced
2232 **** `dired-shrink-to-fit'
2233 **** `display-buffer-reuse-frames'
2234 **** `display-buffer-function'
2235 **** `special-display-buffer-names'
2236 **** `special-display-frame-alist'
2237 **** `special-display-function'
2238 **** `special-display-regexps'
2242 *** `current-time-string' no longer requires that its argument's year
2243 must be in the range 1000..9999. It now works with any year supported
2244 by the underlying C implementation.
2246 *** `current-time' now returns extended-format time stamps
2247 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2248 PSEC is typically a multiple of 1000 on current machines. Other
2249 functions that use this format, such as `file-attributes' and
2250 `format-time-string', have been changed accordingly. Old-format time
2251 stamps are still accepted.
2253 *** The format of timers in `timer-list' and `timer-idle-list' is now
2254 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2255 The PSECS slot is new, and uses picosecond resolution. It can be
2256 accessed via the new `timer--psecs' accessor.
2258 *** Last-modified time stamps in undo lists now are of the form
2259 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2263 *** Improved security when handling persistent objects:
2265 **** `eieio-persistent-read' now features optional arguments for specifying
2266 the class to load, as well as a flag stating whether subclasses are allowed;
2267 if provided, other classes will be rejected by the reader. For
2268 compatibility with existing code, if the class is omitted only a
2271 **** New specialized reader for pulling in classes and signaling errors
2272 without evaluation of suspicious code.
2274 **** All slots that contain objects must have a :type. Slots with lists
2275 of objects must use a new type predicate for a list of an object type.
2277 *** Support for `find-function' and similar utilities, through the addition
2278 of filename support to generated symbols.
2280 ** Floating point functions now always return special values like NaN,
2281 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2282 Previously, they returned NaNs on some platforms but signaled errors
2283 on others. The affected functions are acos, asin, tan, exp, expt,
2284 log, log10, sqrt, and mod.
2286 ** New fringe bitmap `exclamation-mark'.
2288 ** Miscellaneous changes to special forms and macros
2290 *** `defun' and `defmacro' are now macros rather than special forms.
2292 *** `kbd' is now a function rather than a macro.
2294 ** Miscellaneous new functions
2296 *** `set-temporary-overlay-map' sets up a temporary keymap that
2297 takes precedence over most other maps for a short while (normally one key).
2299 *** `autoloadp' tests if its argument is an autoloaded object.
2301 *** `autoload-do-load' performs the autoloading operation.
2303 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2305 *** `file-name-base' returns a file name sans directory and extension.
2307 *** `function-get' fetches a function property, following aliases.
2309 *** `posnp' tests if an object is a `posn'.
2311 *** `system-users' returns the user names on the system.
2313 *** `system-groups' returns the group names on the system.
2315 *** `tty-top-frame' returns the topmost frame of a text terminal.
2317 ** The following functions and variables are obsolete:
2318 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2319 *** `buffer-has-markers-at'
2320 *** `macro-declaration-function' (use `macro-declarations-alist')
2321 *** `window-system-version' (provides no useful information)
2322 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2323 *** `query-replace-interactive'
2324 *** `font-list-limit' (has had no effect since Emacs < 23)
2327 * Changes in Emacs 24.3 on Non-Free Operating Systems
2329 ** Cygwin builds can use the native MS Windows user interface.
2330 Pass `--with-w32' to configure. The default remains the X11 interface.
2332 ** Two new functions are available in Cygwin builds:
2333 `cygwin-convert-file-name-from-windows' and
2334 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2335 code to access the Cygwin file-name mapping machinery to convert
2336 between Cygwin and Windows-native file and directory names.
2338 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2339 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2340 `mouse-autoselect-window'.
2342 ** On MS Windows Vista and later Emacs now supports symbolic links.
2344 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2345 support for libxml2, even if its presence is detected.
2347 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2349 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2350 directories to the search path. You must add them yourself if you want them.
2353 * Changes in Emacs 24.2
2355 ** This is mainly a bug-fix release.
2358 * Installation Changes in Emacs 24.1
2360 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2361 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2362 also depend on Gtk+. You can disable them with --without-rsvg and
2365 ** Emacs can be compiled with GnuTLS support.
2366 This happens by default if a suitably recent version of the library is
2367 found at build time. To prevent this, use the configure option
2368 `--without-gnutls'. See below for GnuTLS features.
2370 ** Emacs can be compiled with SELinux support.
2371 This happens by default if a suitably recent version of the library is
2372 found at build time. To prevent this, use the configure option
2373 `--without-selinux'. See below for SELinux features.
2375 ** Emacs can be compiled with ImageMagick support.
2376 This happens by default if a suitably recent version of the library is
2377 found at build time. To prevent this, use the configure option
2378 `--without-imagemagick'. See below for ImageMagick features.
2379 This feature is not available for the Nextstep or MS ports.
2381 ** Emacs can be compiled with libxml2 support.
2382 This happens by default if a suitably recent version of the library is
2383 found at build time. To prevent this, use the configure option
2384 `--without-xml2'. See below for libxml2 features.
2386 ** By default, the installed Info and man pages are compressed.
2387 You can disable this by configuring --without-compress-info.
2389 ** New configure option --with-wide-int.
2390 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2391 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2394 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2395 These provide no new functionality, they just remove the need to edit
2396 lib-src/Makefile by hand in order to use the associated features.
2398 ** New configure option --enable-use-lisp-union-type.
2399 This is only useful for Emacs developers to debug certain types of bugs.
2400 This is not a new feature; only the configure flag is new.
2402 ** The standalone programs digest-doc and sorted-doc are removed.
2403 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2405 ** The standalone program `fakemail' is removed.
2406 If you need it, feedmail.el provides a superset of the functionality.
2409 * Startup Changes in Emacs 24.1
2411 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2412 command line arguments, and the EMACS_UNIBYTE environment variable, no
2413 longer have any effect. (They were declared obsolete in Emacs 23.)
2415 ** New command line option `--no-site-lisp' removes site-lisp directories
2416 from load-path. -Q now implies this. This option does not affect the
2417 EMACSLOADPATH environment variable (and hence has no effect for
2421 * Changes in Emacs 24.1
2425 *** Many packages now use the `completion-at-point' command,
2426 rather than implementing separate completion commands.
2428 *** `completion-at-point' now handles tags and semantic completion.
2430 *** Completion in a non-minibuffer now tries to detect the end of completion
2431 and pops down the *Completions* buffer accordingly.
2433 *** New option `completion-cycle-threshold' allows completion cycling.
2435 *** New option `completion-category-overrides' for overriding the
2436 default completion style in certain circumstances.
2438 *** New completion style `substring'.
2440 *** Completion of buffer names uses `substring' completion by default.
2442 *** The option `widget-complete-field' has been removed.
2446 *** The first time you try sending mail, Emacs asks for a mail method.
2447 This is implemented by a new default for `send-mail-function', which
2448 is `sendmail-query-once'. This offers to use the smtpmail package, or
2449 to use the old defaults relying on external mail facilities
2450 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2451 `mailclient-send-it' on Windows).
2453 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2454 transfers the report to your desktop's preferred mail client, if there
2455 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2458 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2459 and Mail mode changes
2461 ** Emacs server and client changes
2463 *** New option `server-port' specifies the port for TCP Emacs servers.
2465 *** New emacsclient argument -q/--quiet suppresses some status messages.
2467 *** New emacsclient argument --frame-parameters specifies the frame
2468 parameters of any newly-created graphical frame.
2470 *** If emacsclient shuts down due to Emacs signaling an error,
2471 its exit status is 1.
2473 *** New emacsclient argument --parent-id ID.
2474 This opens a client frame in parent X window ID, via XEmbed, similar
2475 to the --parent-id argument to Emacs.
2477 ** Internationalization changes
2479 *** Emacs now supports display and editing of bidirectional text.
2480 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2481 displayed in the correct visual order as expected by users of those
2482 scripts. The display reordering is a "full bidirectionality" class
2483 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2484 with no RTL text should look exactly the same as before.
2486 **** New buffer-local variable `bidi-display-reordering'.
2487 To disable display reordering in a buffer, change this to nil.
2489 **** New buffer-local variable `bidi-paragraph-direction'.
2490 If nil (the default), Emacs determines the base direction of each
2491 paragraph from its text, as specified by the UBA. Setting the value
2492 to `right-to-left' or `left-to-right' forces a base direction on each
2495 Paragraphs with right-to-left base direction are displayed starting at
2496 the right window edge.
2498 *** Enhanced support for characters with no glyphs in available fonts,
2499 or, on text terminals, characters that cannot be encoded by the
2500 terminal coding system. The new option `glyphless-char-display-control'
2501 specifies how to display them: as a hexadecimal code in a box, a thin
2502 1-pixel space, an empty box, etc.
2504 *** New input methods for Farsi and Bulgarian
2505 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2507 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2508 (U+2010 and U+2011).
2510 *** New Hebrew translation of the Emacs Tutorial.
2511 Type `C-u C-h t' to choose it in case your language setup doesn't
2512 automatically select it.
2514 ** An Emacs Lisp package manager is now included.
2515 This is a convenient way to download and install additional packages,
2516 from a package repository at http://elpa.gnu.org.
2518 *** M-x list-packages shows a list of packages, which can be
2519 selected for installation.
2521 *** New command `describe-package', bound to `C-h P'.
2523 *** By default, all installed packages are loaded automatically when
2524 Emacs starts up. To disable this, set `package-enable-at-startup' to
2525 nil. To specify the packages to load, customize `package-load-list'.
2527 ** Custom theme changes
2529 *** New command `M-x customize-themes', which provides a convenient
2530 interface for enabling and disabling Custom themes.
2532 *** New option `custom-theme-load-path' is the load path for themes.
2533 Emacs no longer looks for Custom themes in `load-path'. The default
2534 value of `custom-theme-load-path' says to look for themes in
2535 `custom-theme-directory', followed by a subdirectory of
2536 `data-directory' named "themes/", which contains a small selection of
2537 built-in Custom themes.
2539 *** New option `custom-safe-themes' records known-safe theme files.
2540 If a theme is not in this list, Emacs queries before loading it, and
2541 offers to save the theme to `custom-safe-themes' automatically. By
2542 default, all themes included in Emacs are treated as safe.
2544 ** Improved GTK integration
2546 *** GTK scroll-bars are now placed on the right by default.
2547 The function `set-scroll-bar-mode' can change this.
2549 *** GTK tool bars can have just text, just images or images and text.
2550 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2551 the default is taken from desktop settings.
2553 *** GTK tool bars can be placed on any edge of the frame.
2554 The frame-parameter tool-bar-position controls this. It takes the
2555 values top, left, right or bottom. The Options => Show/Hide menu has
2558 *** The default colors for selected text (the `region' face) are taken
2559 from the GTK theme when Emacs is built with GTK.
2561 *** Emacs uses GTK tooltips by default if built with GTK.
2562 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2564 ** Graphical interface changes
2566 *** On graphical displays, the mode-line no longer ends in dashes.
2567 Also, the first dash (which does not indicate anything) is just
2568 displayed as a space.
2570 *** `menu-bar-select-buffer-function' lets you choose another operation
2571 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2573 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2574 built with Xft. These fonts can be set via X resources, for example:
2575 Emacs.pane.menubar.font: Courier-12
2579 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2580 or if it receives a SIGINT signal in batch mode.
2582 *** `kill-emacs-hook' is now also run in batch mode.
2583 Third-party code which adds to `kill-emacs-hook' should check if they
2584 do the right thing in batch mode.
2586 ** Scrolling changes
2588 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2589 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2590 of buffer at first key-press (instead they move to top/bottom of buffer)
2591 when `scroll-error-top-bottom' is non-nil.
2593 *** New option `scroll-error-top-bottom' (see above).
2595 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2596 scroll a line instead of full screen.
2598 *** New property `scroll-command' should be set on a command's symbol to
2599 define it as a scroll command affected by `scroll-preserve-screen-position'.
2601 *** If you customize `scroll-conservatively' to a value greater than 100,
2602 Emacs will never recenter point in the window when it scrolls due to
2603 cursor motion commands or commands that move point (e.f., `M-g M-g').
2604 Previously, you needed to use `most-positive-fixnum' as the value of
2605 `scroll-conservatively' to achieve the same effect.
2607 *** "Aggressive" scrolling now honors the scroll margins.
2608 If you customize `scroll-up-aggressively' or
2609 `scroll-down-aggressively' and move point off the window, Emacs now
2610 scrolls the window so as to avoid positioning point inside the scroll
2613 ** Basic SELinux support has been added.
2614 This requires Emacs to be linked with libselinux at build time.
2616 *** Emacs preserves the SELinux file context when backing up.
2617 Also, the function `copy-file' has an extra optional argument for
2618 preserving SELinux context, and the return value of `backup-buffer'
2619 now includes the SELinux context.
2621 *** New functions `file-selinux-context' and `set-file-selinux-context'
2622 get and set the SELinux context of a file.
2626 *** `delete-by-moving-to-trash' now only affects commands that specify
2627 trashing. This avoids inadvertently trashing temporary files.
2629 *** Calling `delete-file' or `delete-directory' with a prefix argument
2630 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2632 ** File- and directory-local variable changes
2634 *** You can stop directory local vars from applying to subdirectories.
2635 Add an element (subdirs . nil) to the alist portion of any variables
2636 settings to indicate that the section should not apply to
2639 *** Directory local variables can apply to some file-less buffers.
2640 Affected modes include dired, vc-dir, and log-edit. For example,
2641 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2642 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2643 `hack-dir-local-variables-non-file-buffer' to support this.
2645 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2646 Instead, use "eval: (minor-mode 1)".
2648 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2649 to `inhibit-local-variables-regexps'. As the name suggests, it now
2650 applies to ALL file local variables, not just -*- lines. The
2651 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2656 *** The `quit-window' command now restores the last buffer displayed
2657 in the quitted window.
2659 *** Resizing an Emacs frame now preserves proportional window sizes,
2660 modulo restrictions like window minimum sizes and fixed-size windows.
2662 *** The behavior of `display-buffer' is now customizable in detail.
2664 **** New option `display-buffer-base-action' specifies a list of
2665 user-determined display "actions" (functions and optional arguments
2666 for choosing the displaying window).
2668 This takes precedence over the default display action, which is
2669 specified by `display-buffer-fallback-action'.
2671 **** New option `display-buffer-alist' maps buffer name regexps to
2672 display actions, taking precedence over `display-buffer-base-action'.
2674 *** New option `window-combination-limit'.
2675 The new option `window-combination-limit' allows to return the space
2676 obtained for resizing or creating a window more reliably to the window
2677 from which such space was obtained.
2679 *** New option `window-combination-resize'.
2680 The new option `window-combination-resize' allows to split a window that
2681 otherwise cannot be split because it's too small by stealing space from
2682 other windows in the same combination. Subsequent resizing or deletion
2683 of the window will resize all windows in the same combination as well.
2685 *** New option `frame-auto-hide-function' lets you choose between
2686 iconifying or deleting a frame when burying a buffer in a dedicated
2687 frame, or quitting a window showing a buffer in a frame of its own.
2689 *** New commands `maximize-window' and `minimize-window'.
2690 These maximize and minimize the size of a window within its frame.
2692 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2693 These functions allow to navigate through the live buffers that have
2694 been shown in a specific window.
2696 ** Minibuffer changes
2698 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2699 This is handy for minibuffer-only frames, and is also used for the feature
2700 where mouse-1 pops up *Messages*"', which can now easily be changed.
2702 *** Minibuffers set `truncate-lines' to nil.
2703 If you want to change the value to something else, you could use
2704 for example `minibuffer-setup-hook'.
2706 ** `auto-mode-case-fold' is now enabled by default.
2708 ** `backup-by-copying-when-mismatch' now defaults to t.
2710 ** New basic faces `error', `warning', `success'.
2711 These are used to highlight text indicating failure, caution or
2712 successful operation.
2714 ** New option `list-colors-sort' defines the color sort order
2715 for `list-colors-display'.
2717 ** The variable `focus-follows-mouse' now always defaults to nil.
2720 * Editing Changes in Emacs 24.1
2724 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2725 `isearch-yank-line'.
2727 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2728 `isearch-yank-kill'.
2730 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2732 ** New commands `count-words-region' and `count-words'.
2734 *** M-= is bound to `count-words-region', not `count-lines-region'.
2735 The `count-words-region' command, when called interactively, reports
2736 the number of lines, words, and characters in the region. It is a
2737 superset of the old `count-lines-region', which is now an obsolete
2740 ** The command `just-one-space' (M-SPC), if given a negative argument,
2741 also deletes newlines around point.
2745 *** New option `delete-active-region'.
2746 If non-nil, [delete] and DEL delete the region if it is active and no
2747 prefix argument is given. If set to `kill', those commands kill
2750 *** New command `delete-forward-char', bound to [delete].
2751 This is meant for interactive use, and obeys `delete-active-region'.
2752 The command `delete-char' does not obey `delete-active-region'.
2754 *** `delete-backward-char' is now a Lisp function.
2755 Apart from obeying `delete-active-region', its behavior is unchanged.
2756 However, the byte compiler now warns if it is called from Lisp; Lisp
2757 callers should use delete-char with a negative argument instead.
2759 *** The option `mouse-region-delete-keys' has been deleted.
2761 ** Selection changes.
2763 The default handling of clipboard and primary selections has been
2764 changed to conform with modern X applications. In short, most
2765 commands for killing and yanking text now use the clipboard, while
2766 mouse commands use the primary selection.
2768 In the following, we provide a list of these changes, followed by a
2769 list of steps to get the old behavior back if you prefer that.
2771 *** `select-active-regions' now defaults to t.
2772 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2773 the kill ring. The selected text is put in the primary selection, if
2774 the system possesses a separate primary selection facility (e.g. X).
2776 **** `select-active-regions' also accepts a new value, `only'.
2777 This means to only set the primary selection for temporarily active
2778 regions (usually made by mouse-dragging or shift-selection);
2779 "ordinary" active regions, such as those made with C-SPC followed by
2780 point motion, do not alter the primary selection.
2782 **** `mouse-drag-copy-region' now defaults to nil.
2784 *** mouse-2 is now bound to `mouse-yank-primary'.
2785 This pastes from the primary selection, ignoring the kill-ring.
2786 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2788 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2790 *** `x-select-enable-primary' now defaults to nil.
2791 Thus, commands that kill text or copy it to the kill-ring (such as
2792 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2794 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2795 exactly equivalent to M-w, C-w, and C-y respectively.
2797 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2798 non-nil by default, as Windows does not support the primary selection
2799 between applications.
2801 *** To return to the previous behavior, do the following:
2803 **** Change `select-active-regions' to nil.
2804 **** Change `mouse-drag-copy-region' to t.
2805 **** Change `x-select-enable-primary' to t (on X only).
2806 **** Change `x-select-enable-clipboard' to nil.
2807 **** Bind `mouse-yank-at-click' to mouse-2.
2809 *** Support for X cut buffers has been removed.
2811 *** X clipboard managers are now supported.
2812 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2814 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2815 in the current rectangle. With a prefix argument, this prompts for a
2816 number to count from and for a format string.
2818 ** `redisplay-dont-pause' now defaults to t.
2819 This makes Emacs feel more responsive to editing commands that arrive
2820 at high rate, e.g. if you lean on some key, because stopping redisplay
2821 in the middle (when this variable is nil) forces more expensive
2822 updates later on, and Emacs appears to be unable to keep up.
2824 ** The behavior of <TAB> for active regions in Text mode has changed.
2825 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2826 when the region is active causes Emacs to indent all the lines in the
2827 region, aligning them with the line previous to the first line in the
2828 region (or with the left margin if there is no previous line).
2830 ** When `occur' is called with a prefix argument, matching strings are
2831 collected into the `*Occur*' buffer without line numbers. If there
2832 are parenthesized subexpressions in the specified regexp, `occur'
2833 reads replacement text that may contain \\& and \\N whose convention
2834 follows `replace-match'.
2837 * Changes in Specialized Modes and Packages in Emacs 24.1
2839 ** Archive Mode has basic support for browsing and updating 7z archives.
2843 *** BibTeX mode now supports biblatex.
2844 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2845 `bibtex-entry-field-alist' is now an obsolete alias for
2846 `bibtex-BibTeX-entry-alist'.
2848 *** New command `bibtex-search-entries', bound to C-c C-a.
2850 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2852 *** New variable `bibtex-search-entry-globally'.
2856 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2858 *** The default browser used by the package is now the "xdg-open" program,
2859 on platforms that support it. This calls your desktop's preferred browser.
2863 *** Support for musical notes.
2865 *** Support for logarithmic units.
2867 *** No longer uses the tex prefix for TeX specific unit names when
2868 using TeX or LaTeX mode.
2870 *** New option to highlight selections using faces.
2872 *** `calc-histogram' has the option of using a vector to determine the bins.
2874 *** New "O" option prefix.
2876 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2878 ** Calendar, Diary, and Appt
2880 *** Diary entries can contain non-printing "comments".
2881 See the variable `diary-comment-start'.
2883 *** Appointments can specify their individual warning times.
2884 See the variable `appt-warning-time-regexp'.
2886 *** The function specified by `appt-disp-window-function' may be passed
2887 lists of arguments if multiple appointments are due at similar times.
2888 If you are using a custom function for this, you should update it.
2890 *** New function `diary-hebrew-birthday'.
2892 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2893 may no longer be nil, but must all be strings.
2895 *** The obsolete (since Emacs 22.1) method of enabling the appt
2896 package by adding `appt-make-list' to `diary-hook' has been removed.
2897 Use `appt-activate' instead.
2899 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2900 appt-issue-message (use the function appt-activate)
2901 appt-visible/appt-msg-window (use the variable appt-display-format)
2903 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2904 view-diary-entries, list-diary-entries, show-all-diary-entries
2908 *** New feature to "guess" the style in an existing buffer.
2909 The main entry point is M-x c-guess.
2911 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2913 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2914 Thus C-M-a will, by default, go to the beginning of the immediate function,
2917 *** "Macros with semicolons" can be registered for correct indentation.
2918 Where such a macro ends a line (no semicolon) the next statement is no longer
2919 parsed as a statement continuation.
2921 ** Comint and modes derived from it use the standard completion code.
2925 *** Compilation mode can be used without Font Lock mode.
2926 `compilation-parse-errors-function' is now obsolete.
2928 *** New variable `compilation-filter-start', which is bound while
2929 `compilation-filter-hook' runs. It records the start position of the
2930 text inserted by `compilation-filter'.
2932 *** `compilation-error-screen-columns' and `compilation-first-column'
2933 are obeyed in the editing buffer. So programming language modes can
2934 set them, whereas previously only the value in the *Compilation*
2939 *** Customize buffers now contain a search field.
2940 The search is performed using `customize-apropos'.
2941 To turn off the search field, set `custom-search-field' to nil.
2943 *** Options in customize group buffers start out hidden if not customized.
2944 Use the arrow to the left of the option name to toggle visibility.
2946 *** custom-buffer-sort-alphabetically now defaults to t.
2948 *** The color widget now has a "Choose" button, which allows you to
2949 choose a color via `list-colors-display'.
2953 *** It is now possible to access buses other than the default system
2956 *** The `dbus-register-method' and `dbus-register-property' functions
2957 optionally do not register names.
2959 *** The new function `dbus-register-service' registers a known service
2960 name on a D-Bus without also registering a property or a method.
2964 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2965 if called with a prefix argument, read a file name from the minibuffer
2966 instead of using the current buffer.
2968 *** The "dired local variables" feature of Dired-x is obsolete.
2969 The standard directory local variables feature replaces it.
2973 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2974 controlling attempts to autojoin a channel.
2976 *** New variable `erc-coding-system-precedence': If we use `undecided'
2977 as the server coding system, this variable will then be consulted.
2978 The default is to decode strings that can be decoded as utf-8 as
2979 utf-8, and do the normal `undecided' decoding for the rest.
2983 *** The default value of `eshell-directory-name' has changed
2984 to be an "eshell" directory in `user-emacs-directory'.
2985 The old "~/.eshell/" directory is still used if it exists, though.
2989 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2990 It now supports multithread non-stop debugging and simultaneous
2991 debugging of several threads.
2995 *** RET (`image-toggle-animation') toggles animation, if applicable.
2996 Animation plays once, unless the option `image-animate-loop' is non-nil.
3000 *** New command M-x info-display-manual displays a named Info manual.
3001 If that manual is already visited in some Info buffer, it displays
3002 that buffer. (This is handy if you have many manuals in many *info*
3003 buffers, and don't remember the name of the buffer visiting the manual
3004 you want to consult.) Otherwise, it loads and displays the manual.
3006 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3007 This is for compatibility with the stand-alone Info reader program,
3008 and also because `Info-edit' is a rarely used command that is disabled
3011 ** Mail mode changes (not Message mode)
3013 *** New command M-x mail-add-attachment for adding MIME attachments
3015 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3016 (Its name is misleading, since it has nothing to do with MIME
3017 attachments.) The old name is now an obsolete alias to the new name.
3019 ** MH-E has been updated to MH-E version 8.3.1.
3020 See MH-E-NEWS for details.
3022 ** Modula-2 mode provides auto-indentation.
3024 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3026 ** nXML mode no longer binds C-RET to `nxml-complete'.
3027 Completion is now performed via `completion-at-point', bound to C-M-i
3028 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3029 default), this performs tag completion.
3031 ** Org mode has been updated to version 7.8.09.
3032 See ORG-NEWS for details.
3034 ** Prolog mode has been completely revamped, with lots of additional
3035 functionality such as more intelligent indentation, electricity,
3036 support for more variants, including Mercury, and a lot more.
3040 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3041 in the Rmail incoming message.
3043 *** The variable `rmail-message-filter' no longer has any effect.
3044 This change was made in Emacs 23.1 but was not advertised at the time.
3045 Try using `rmail-show-message-hook' instead.
3049 *** M-x shell prompts for the shell path name if the default directory
3050 is a remote file name and neither the environment variable $ESHELL nor
3051 the variable `explicit-shell-file-name' is set.
3053 *** TAB is now bound to the standard `completion-at-point' command,
3054 which now implements the pcomplete rules for shell command completion.
3058 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3059 if the mail server supports them. This uses either built-in GnuTLS
3060 support, or the starttls.el library. Customize `smtpmail-stream-type'
3063 *** The variable `smtpmail-auth-credentials' has been removed.
3064 By default, the information is now stored in the file ~/.authinfo.
3065 This was the default value of smtpmail-auth-credentials. If you had
3066 customized smtpmail-auth-credentials to a list of user names and
3067 passwords, those settings are not used. During your first connection
3068 to the smtp server, Emacs will prompt for the user name and password,
3069 and offer to save them to ~/.authinfo. Or you can manually copy the
3070 credentials to ~/.authinfo. For example, if you had
3072 (setq smtpmail-auth-credentials
3073 '(("mail.example.org" 25 "jim" "s!cret")))
3075 then the equivalent line in ~/.authinfo would be
3077 machine mail.example.org port 25 login jim password s!cret
3079 See the auth-source manual for more information, e.g. on encrypting
3080 the credentials file.
3082 *** The variable `smtpmail-starttls-credentials' has been removed.
3083 If you had that set, you need to put
3085 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3087 in your ~/.authinfo file instead.
3089 *** SMTPmail defaults to using the address in the From: header as the
3090 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3091 to the address you wish to use instead.
3095 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3096 and `sql-oracle-scan-on'.
3098 *** New options controlling prompting for login parameters.
3099 Each supported product has a custom variable `sql-*-login-params',
3100 which is a list of the parameters to be prompted for before a
3101 connection is established.
3103 *** The command `sql-product-interactive' now takes a prefix argument,
3104 which causes it to prompt for an SQL product.
3106 *** Product-specific SQL interactive commands now take prefix arguments.
3107 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3108 given a prefix argument, prompt for a name for the SQL interactive
3109 buffer. This reduces the need for calling `sql-rename-buffer'.
3111 *** SQL interactive modes suppress command continuation prompts, and
3112 replace tabs with spaces. The first change impacts multiple line SQL
3113 statements entered with C-j between each line, statements yanked into
3114 the buffer and statements sent with `sql-send-*' functions. The
3115 second prevents the MySQL and Postgres interpreters from listing
3116 object name completions when sent text via `sql-send-*' functions.
3118 *** New command `sql-connect' starts a predefined SQLi session,
3119 using the login parameters from `sql-connection-alist'.
3121 *** New "Save Connection" menu item in SQLi buffers.
3122 This gathers the login params specified for the SQLi session, if it
3123 was not started by a connection, and saves them as a new connection.
3125 *** New commands for listing database objects and details:
3126 sql-list-all and sql-list-table.
3128 *** An API for manipulating SQL product definitions has been added.
3132 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3136 *** New inline access method "ksu" (kerberized su).
3138 *** The following access methods are discontinued: "ssh1_old",
3139 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3141 *** The user option `remote-file-name-inhibit-cache' controls whether
3142 remote file attributes are cached for better performance.
3144 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3145 default value to "".
3147 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3148 for remote machines which support SELinux.
3150 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3151 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3152 the degree of parallelism.
3154 ** VC and related modes
3156 *** Support for pulling on distributed version control systems.
3157 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3158 supported (currently with Bzr, Git, and Mercurial), to update the
3159 current branch and working tree. A prefix argument means to prompt
3160 the user for specifics, e.g. a pull location.
3162 *** `vc-update' is now an alias for `vc-pull'.
3164 *** Support for merging on distributed version control systems.
3165 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3166 is supported (currently with Bzr, Git, and Mercurial), to merge
3167 changes from another branch into the current one. It prompts for
3168 specifics, e.g. a merge source.
3170 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3171 shows a diff while querying the user. It defaults to t.
3173 *** Log entries in some Log View buffers can be toggled to display a
3174 longer description by typing RET (log-view-toggle-entry-display).
3175 This is currently supported for Bzr, Git, and Mercurial (to support
3176 another backend, define a `log-view-expanded-log-entry-function').
3177 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3178 use this to display the full log entry for the revision at point.
3180 *** New command `vc-ediff' allows visual comparison of two revisions
3181 of a file similar to `vc-diff', but using ediff backend.
3183 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3184 this was not advertised at the time.
3186 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3187 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3188 this was not advertised at the time.
3194 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3196 *** partial-completion-mode (complete.el) is obsolete.
3197 You can get a comparable behavior with:
3198 (setq completion-styles '(partial-completion initials))
3199 (setq completion-pcm-complete-word-inserts-delimiters t)
3201 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3203 *** pgg is obsolete (use EasyPG instead).
3205 *** sregex.el is obsolete, since rx.el is a strict superset.
3207 *** s-region.el and pc-select.el are obsolete.
3208 They are superseded by shift-select-mode, enabled by default since 23.1.
3210 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3214 *** The Landmark game is now invoked with `landmark', not `lm'.
3215 Its functions and variables have been similarly renamed.
3217 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3218 (This interfered with cua-mode.)
3220 *** f90.el has some support for Fortran 2008 syntax.
3222 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3224 *** New command `nato-region' converts text to NATO phonetic alphabet.
3227 * New Modes and Packages in Emacs 24.1
3229 ** Occur Edit mode applies edits made in *Occur* buffers to the
3230 original buffers. It is bound to "e" in Occur mode.
3232 ** New global minor mode electric-pair-mode.
3233 When enabled, typing an open parenthesis automatically inserts the
3234 matching closing one.
3236 ** New global minor mode electric-indent-mode.
3237 When enabled, typing certain characters triggers reindentation.
3238 Major modes wishing to use this can set electric-indent-chars or
3239 electric-indent-functions.
3241 ** New global minor mode electric-layout-mode.
3242 When enabled, typing certain characters automatically inserts newlines.
3243 Major modes wishing to use this can set electric-layout-rules.
3245 ** tabulated-list.el provides a generic major mode for tabulated data,
3246 from which other modes can be derived.
3248 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3250 ** secrets.el is an implementation of the Secret Service API, an
3251 interface to password managers like GNOME Keyring or KDE Wallet. The
3252 Secret Service API requires D-Bus for communication. The command
3253 `secrets-show-secrets' offers a buffer with a visualization of the
3256 ** notifications.el provides an implementation of the Desktop
3257 Notifications API. It requires D-Bus for communication.
3259 ** soap-client.el supports access to SOAP web services from Emacs.
3260 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3262 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3264 ** New emacs-lock.el package.
3265 The previous version has been moved to obsolete/old-emacs-lock.el.
3266 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3267 against exiting Emacs and killing the buffer can be set separately.
3268 The mechanism for automatically turning off protection for buffers
3269 with dead inferior processes has been generalized.
3272 * Incompatible Lisp Changes in Emacs 24.1
3274 ** Passing a nil argument to a minor mode function call now ENABLES
3275 the minor mode unconditionally. This is so that you can write e.g.
3277 (add-hook 'text-mode-hook 'foo-mode)
3279 to enable foo-mode in Text mode buffers, removing the need for
3280 `turn-on-foo-mode' style functions. This affects all mode commands
3281 defined by `define-minor-mode'. If called interactively, the mode
3282 command still toggles the minor mode.
3284 ** The return value of `backup-buffer' has changed.
3285 It is now a list of three elements, where the second element is a list
3286 describing the original file's SELinux context. If Emacs or the
3287 system lacks SELinux support, the context list is (nil nil nil nil).
3288 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3290 ** `char-direction-table' and the `char-direction' function were deleted.
3291 They were buggy and inferior to the new support of bidirectional
3292 editing introduced in Emacs 24. If you need the bidirectional
3293 properties of a character, use `get-char-code-property' with the last
3294 argument `bidi-class'.
3296 ** `copy-directory' now copies the source directory as a subdirectory
3297 of the target directory, if the latter is an existing directory. The
3298 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3299 the contents directly into a pre-existing target directory.
3301 ** For mouse click input events in the text area, the Y pixel
3302 coordinate in the POSITION list now counts from the top of the text
3303 area, excluding any header line. Previously, it counted from the top
3306 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3307 been further reduced. Now a backquote not followed by a space is
3308 always treated as a "new-style" backquote. Please remove all
3309 "old-style" backquotes from your code. If your code uses backquotes
3310 as documented in the Elisp manual, and compiles without warning, then
3311 you have nothing to do in this regard. Code not following the
3312 appropriate conventions may fail to compile.
3314 The most common cause of trouble seems to be an old-style backquote
3315 followed by a newline. Another cause of trouble is vector notation
3316 for key sequence notation: instead of [(control ,)] and [(control ')],
3317 you should write [(control ?,)] and [(control ?')], which will work in
3320 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3321 was not advertised at the time. The function `custom-initialize-delay'
3322 replaced all known uses.
3324 ** `view-buffer' now treats special mode-class in the same way that
3325 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3326 major mode is special).
3328 ** Menu and tool bar changes
3330 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3331 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3332 With these alist entries omitted, `make-frame' checks the value of the
3333 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3334 a menu-bar or tool-bar, respectively. If the alist entries are added,
3335 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3337 *** The menu bar bindings's caches are not used any more.
3338 Use (where-is-internal <def> nil t) instead.
3340 ** Regions created by mouse dragging are now normal active regions,
3341 similar to those created by shift-selection (see Selection changes
3342 above). In previous Emacs versions, these regions were delineated by
3343 `mouse-drag-overlay'; that variable has been removed.
3345 ** The fourth argument of `filter-buffer-substring' has been removed.
3346 If you want to remove text properties from the final result, simply
3347 pass the result through substring-no-properties.
3349 ** cl.el no longer provides `cl-19'.
3351 ** The following obsolete functions and aliases have been removed
3352 (the appropriate new function is given in parentheses; "not needed"
3353 means you can just remove all calls to the function in question):
3355 *** `comint-kill-output' (`comint-delete-output')
3356 *** `decompose-composite-char' (`char-to-string')
3357 *** `outline-visible' (`outline-invisible-p')
3358 *** `internal-find-face' (`facep')
3359 *** `internal-get-face' (`facep and check-face')
3360 *** `frame-update-faces' (not needed)
3361 *** `frame-update-face-colors' (`frame-set-background-mode')
3362 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3363 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3364 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3365 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3366 *** `x-make-font-unbold' (`make-face-unbold')
3367 *** `x-make-font-unitalic' (`make-face-unitalic')
3368 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3369 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3370 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3371 *** `char-bytes' (== 1)
3372 *** `isearch-return-char' (`isearch-printing-char')
3373 *** `make-local-hook' (not needed)
3374 *** `set-screen-height' (`set-frame-height')
3375 *** `set-screen-width' (`set-frame-width')
3377 ** The following obsolete variables and varaliases have been removed
3378 (the appropriate new variable is given in parentheses):
3380 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3381 *** `vc-header-alist' (`vc-BACKEND-header')
3382 *** `directory-sep-char' (== ?/)
3383 *** `font-lock-defaults-alist' (`font-lock-defaults')
3384 *** `e' (`float-e').
3386 ** The following obsolete files were removed:
3387 sc.el, x-menu.el, rnews.el, rnewspost.el
3389 ** The format of the finder-inf.el file has changed, since the Finder
3390 mechanism is now based on the package system. The variable
3391 `finder-package-info' is replaced by `package--builtins' and
3392 `finder-keywords-hash'.
3394 ** When generating autoloads, `update-directory-autoloads' no longer
3395 assumes every inspected file is in your `load-path'. It instead
3396 generates relative names according to the current `load-path'.
3399 * Lisp Changes in Emacs 24.1
3401 ** Code can now use lexical scoping by default instead of dynamic scoping.
3402 The `lexical-binding' variable enables lexical scoping for local
3403 variables. It is typically set via a file-local variable in the first
3404 line of the file, in which case it applies to all the code in that
3407 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3408 binding instead of the old dynamic binding mode.
3410 *** Lexically scoped interpreted functions are represented with a new form
3411 of function value which looks like (closure ENV ARGS &rest BODY).
3413 *** New macro `letrec' to define recursive local functions.
3415 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3416 So do `defcustom' and other forms that call `defvar' as a subroutine.
3418 *** New function `special-variable-p' to check whether a variable is
3419 declared as dynamically bound.
3421 *** The form ((lambda ...) ...) is deprecated.
3423 ** An Emacs Lisp testing tool is now included.
3424 Emacs Lisp developers can use this tool to write automated tests for
3425 their code. See the ERT info manual for details.
3427 ** Changes for bidirectional display and editing
3429 *** New function `current-bidi-paragraph-direction'.
3430 This returns the base direction of the paragraph at point.
3432 *** New function `bidi-string-mark-left-to-right'.
3433 Given a string containing characters from right-to-left scripts, this
3434 function returns another string which can be safely inserted into a
3435 buffer, such that any following text will be always displayed to the
3436 right of that string. (This works by appending an invisible Unicode
3437 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3439 This is useful when the buffer has overall left-to-right paragraph
3440 direction and you need to insert a string whose contents are not known
3441 in advance, without disrupting the layout of the line.
3445 *** Window tree functions are accessible in Elisp.
3446 Functions are provided to return the parent, siblings or child windows
3447 of any window including internal windows (windows not associated with a
3448 buffer) in the window tree.
3450 **** New function `window-valid-p' gives non-nil for live and internal
3453 **** Window manipulation can deal with internal windows.
3454 Many window handling functions like `split-window', `delete-window', or
3455 `delete-other-windows' as well as the window resizing functions can now
3456 act on any window including internal ones.
3458 *** window-total-height/-width vs window-body-height/-width.
3459 The function `window-height' has been renamed to `window-total-height'
3460 and `window-width' has been renamed to `window-body-width'. The old
3461 names are provided as aliases. Two new functions `window-total-width'
3462 and `window-body-height' are provided.
3464 *** Window parameters specific to window handling functions.
3465 For each window you can specify a parameter to override the default
3466 behavior of a number of functions like `split-window', `delete-window'
3467 and `delete-other-windows'. The variable `ignore-window-parameters'
3468 allows to ignore processing such parameters.
3470 *** New semantics of third argument of `split-window'.
3471 The third argument of `split-window' has been renamed to SIDE and can be
3472 set to any of the values 'below, 'right, 'above, or 'left to make the
3473 new window appear on the corresponding side of the window that shall be
3474 split. Any other value of SIDE will cause `split-window' to split the
3475 window into two side-by-side windows as before.
3477 *** Window resizing functions.
3478 A new standard function for resizing windows called `window-resize' has
3479 been introduced. This and all other functions for resizing windows no
3480 longer delete any windows when they become too small.
3482 *** Deleting the selected window now selects the most recently selected
3483 live window on that frame instead.
3485 *** `adjust-window-trailing-edge' adjustments.
3486 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3487 is able to resize other windows if a window adjacent to the trailing
3488 edge cannot be shrunk any more. This makes its behavior more similar to
3489 that of Emacs 21 without compromising, however, its inability to delete
3490 windows which was introduced in Emacs 22.
3492 *** Window-local buffer lists.
3493 Windows now have local buffer lists. This means that removing a buffer
3494 from display in a window will preferably show the buffer previously
3495 shown in that window with its previous window-start and window-point
3496 positions. This also means that the same buffer may be automatically
3497 shown twice even if it already appears in another window.
3499 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3500 which if non-nil requires the buffer to be displayed in the currently
3501 selected window, signaling an error otherwise. If nil, another window
3502 can be used, e.g. if the selected one is strongly dedicated.
3504 *** `split-window-vertically' and `split-window-horizontally' renamed
3505 to `split-window-below' and `split-window-right' respectively.
3506 The old names are kept as aliases.
3510 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3511 named ACTION, and takes a display action of the same form as
3512 `display-buffer-base-action' (see Changes, above). A non-nil,
3513 non-list value is treated specially, as the old meaning.
3515 **** New variable `display-buffer-overriding-action'.
3517 **** The procedure of `display-buffer' etc. to choose a window is
3518 determined by combining `display-buffer-overriding-action',
3519 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3520 and `display-buffer-fallback-action'. The second and fourth of these
3521 are user-customizable variables.
3523 See the docstring of `display-buffer' for details.
3525 *** New functions `window-state-get' and `window-state-put'.
3526 These functions allow to save and restore the state of an arbitrary
3527 frame or window as an Elisp object.
3531 *** New variable `completion-extra-properties' used to specify extra
3532 properties of the current completion:
3533 - :annotate-function, same as the old completion-annotate-function.
3534 - :exit-function, function to call after completion took place.
3536 *** Functions on `completion-at-point-functions' can return any of the
3537 properties valid for `completion-extra-properties'.
3539 *** `completion-annotate-function' is obsolete.
3541 *** New `metadata' method for completion tables. The metadata thus returned
3542 can specify various details of the data returned by `all-completions':
3543 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3544 used to select a style in completion-category-overrides.
3545 - `annotation-function' to add annotations in *Completions*.
3546 - `display-sort-function' to specify how to sort entries in *Completions*.
3547 - `cycle-sort-function' to specify how to sort entries when cycling.
3549 *** `minibuffer-local-filename-must-match-map' is not used any more.
3550 Instead, the bindings in `minibuffer-local-filename-completion-map'
3551 are combined with `minibuffer-local-must-match-map'.
3553 *** New variable `completing-read-function' allows overriding the
3554 behavior of `completing-read'.
3556 ** `glyphless-char-display' can now distinguish between graphical and
3557 text terminal display, via a char-table entry that is a cons cell.
3559 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3560 Instead, the offending function is removed.
3564 *** New function `run-hook-wrapped' for running an abnormal hook by
3565 passing the hook functions as arguments to a "wrapping" function.
3566 Like `run-hook-with-args-until-success', it stops at the first
3567 non-nil return value.
3569 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3570 set of "wrapping" filters, similar to around advice.
3571 (A version of this macro was actually added in Emacs 23.2 but was not
3572 advertised at the time.)
3576 *** New macro `condition-case-unless-debug' (this was actually added in
3577 Emacs 23.1 as condition-case-no-debug, but not advertised)
3579 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3581 *** Variable `stack-trace-on-error' removed.
3583 *** The debugger can now "continue" from an error, which means it will
3584 jump to the error handler as if the debugger had not been invoked
3585 instead of jumping all the way to the top-level.
3587 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3588 This can be useful when `inhibit-quit' is set.
3590 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3591 named Emacs server instances.
3593 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3594 to redirect STDOUT to a file.
3596 ** The function `format-time-string' now supports the %N directive,
3597 for higher-resolution time stamps.
3599 ** New input reading functions
3601 *** New function `read-char-choice' reads a restricted set of
3602 characters, discarding any inputs not inside the set.
3604 *** The command `read-color' now requires a match for a color name
3605 or RGB triplet, instead of signaling an error if the user provides
3608 **** `facemenu-read-color' is now an alias for `read-color'.
3610 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3611 The variable is now used to load all kind of supported dynamic libraries,
3612 not just image libraries. The previous name is still available as an
3615 ** Syntax parsing changes
3617 *** New variable `syntax-propertize-function'.
3618 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3619 This allows syntax-table properties to be set independently from font-lock:
3620 just call syntax-propertize to make sure the text is propertized.
3621 Together with this new variable come a new hook
3622 syntax-propertize-extend-region-functions, as well as two helper functions:
3623 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3624 as-is; and syntax-propertize-rules which provides a new way to specify
3627 *** Syntax tables support a new "comment style c" additionally to style b.
3629 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3631 ** frame-local variables cannot be let-bound any more.
3633 ** Major and minor mode changes
3635 *** `set-auto-mode' now respects mode: local variables at the end of files,
3636 as well as those in the -*- line.
3638 *** `prog-mode' is a new major mode from which programming modes
3641 **** `prog-mode-hook' can be used to enable features for programming
3642 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3643 on-the-fly spell checking for comments and strings.
3645 *** New hook `change-major-mode-after-body-hook', run by
3646 `run-mode-hooks' just before any other mode hooks.
3648 *** Enabled globalized minor modes can be disabled in specific major modes.
3649 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3650 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3652 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3654 ** File-handling changes
3656 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3657 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3658 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3659 argument is supplied (see Trash changes, above).
3661 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3663 ** Tool-bars can display separators.
3664 Tool-bar separators are handled like menu separators in menu-bar maps,
3665 i.e. via menu entries of the form `(menu-item "--")'.
3669 *** Animated images support (currently animated gifs only).
3671 **** `image-animated-p' returns non-nil if an image can be animated.
3673 **** `image-animate' animates a supplied image spec.
3675 **** `image-animate-timer' returns the timer object for an image that
3678 *** `image-extension-data' has been renamed to `image-metadata'.
3679 The old name is an obsolete alias to the new one.
3681 *** Image mode can view any image type that ImageMagick supports.
3682 This requires Emacs to be built with ImageMagick support.
3684 **** New function `imagemagick-types', defined if ImageMagick support
3685 is enabled, returns a list of image file extensions that your
3686 ImageMagick installation supports.
3688 **** New function `imagemagick-register-types' enables ImageMagick
3689 image types in Image mode and in `create-image' and other helper
3692 **** New option `imagemagick-types-inhibit' excludes certain
3693 ImageMagick image types from `imagemagick-register-types'.
3695 **** With ImageMagick support, there are extra Image mode commands to
3696 resize and rotate images: `image-transform-fit-to-height',
3697 `image-transform-fit-to-width', `image-transform-set-rotation', and
3698 `image-transform-set-scale'.
3700 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3701 passes it to the mail user agent function. This argument specifies an
3702 action for returning to the caller after finishing with the mail. For
3703 example, this is used by Rmail to optionally delete a mail window.
3705 ** XML and HTML parsing
3706 If Emacs is compiled with libxml2 support, there are two new
3707 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3708 and `libxml-parse-xml-region' (which parses XML). Both return an
3709 Emacs Lisp parse tree.
3711 ** Networking and encryption changes
3713 *** `open-network-stream' can now be used to open an encrypted stream.
3714 It now accepts an optional `:type' parameter for initiating a TLS
3715 connection, directly or via STARTTLS. To do STARTTLS, additional
3716 parameters (`:end-of-command', `:success', `:capabilities-command')
3717 must also be supplied.
3719 *** New library gnutls.el.
3720 The new function `gnutls-available-p' returns non-nil if Emacs is
3721 built with GnuTLS support. The main entry points are
3722 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3723 these functions through `open-network-stream', because that can
3724 upgrade connections through STARTTLS opportunistically or use plain
3725 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3728 *** New primitive `secure-hash' that supports many secure hash algorithms:
3729 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3730 sha1.el has been removed. The `sha1' feature is provided by default.
3734 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3736 ** Progress reporters can now "spin".
3737 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3738 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3739 time you call `progress-reporter-update' on that progress reporter,
3740 with a nil or omitted VALUE argument, the reporter message is
3741 displayed with a "spinning bar".
3743 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3744 being reverted, even if the buffer has a local `revert-buffer-function'.
3746 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3747 If delayed-warnings-list is non-nil, the command loop calls
3748 `delayed-warnings-hook' after `post-command-hook'. At present, this
3749 is only used by Emacs on some platforms to display warnings during
3750 startup, which might otherwise not be noticed. This uses the
3751 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3753 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3755 ** New function `make-composed-keymap' that constructs a new keymap
3756 from multiple input maps. You can use this to make a keymap that
3757 inherits from multiple maps, eg:
3758 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3760 ** New function `string-prefix-p'.
3761 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3763 ** New reader macro ## that stands for the empty symbol.
3764 This means that the empty symbol can now be read back. Also, #: by itself
3765 (when not immediately followed by a possible symbol character) stands for
3766 an empty uninterned symbol.
3768 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3770 ** The following functions and variables are obsolete:
3772 *** `tooltip-use-echo-area' is obsolete.
3773 Rather than setting this to t, disable Tooltip mode instead.
3775 *** buffer-substring-filters is obsolete.
3776 Use `filter-buffer-substring-functions' instead.
3778 *** `byte-compile-disable-print-circle' is obsolete.
3780 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3781 Use `post-command-hook' instead.
3783 *** `font-lock-maximum-size' is obsolete.
3786 * Changes in Emacs 24.1 on Non-Free Operating Systems
3788 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3789 and also when HOME is set to C:\ by default.
3791 ** New configure.bat options
3793 *** --enable-checking builds Emacs with extra runtime checks.
3795 *** --distfiles specifies files to be included in binary distribution.
3797 *** --without-gnutls disables automatic GnuTLS detection.
3799 *** --lib for general library linkage, works with the USER_LIBS build variable.
3801 ** New make target `dist' to create binary distribution for MS Windows.
3803 ** The Lisp function `w32-default-color-map' is now obsolete.
3804 (It is only used internally in the Emacs C code.)
3806 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3807 reappear on mouse-over. (Requires OS X 10.6 or later.)
3809 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3810 other platforms, rather than inserting its contents into the buffer.
3813 ----------------------------------------------------------------------
3814 This file is part of GNU Emacs.
3816 GNU Emacs is free software: you can redistribute it and/or modify
3817 it under the terms of the GNU General Public License as published by
3818 the Free Software Foundation, either version 3 of the License, or
3819 (at your option) any later version.
3821 GNU Emacs is distributed in the hope that it will be useful,
3822 but WITHOUT ANY WARRANTY; without even the implied warranty of
3823 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3824 GNU General Public License for more details.
3826 You should have received a copy of the GNU General Public License
3827 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3832 paragraph-separate: "[
\f]*$"