1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
32 ** Emacs can now be compiled with file notification support.
33 This happens by default if a suitable system library is found at
34 build time. To prevent this, use the configure option
35 `--without-file-notification'. See below for file-notify features.
36 FIXME? This feature is not available for the Nextstep port. (?)
39 ** The configure option `--without-compress-info' has been generalized,
40 and renamed to `--without-compress-install'. It now prevents compression
41 of _any_ files during installation.
44 ** The configure option `--with-crt-dir' has been removed.
45 It is no longer needed, as the crt*.o files are no longer linked specially.
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as if they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
162 *** The command `describe-function' has been extended for EIEIO.
163 Running it on constructors will show a full description of the
164 generated class. For generic functions, it will show all
165 implementations together with links to the source. The old commands
166 `describe-class', `describe-constructor' and `describe-generic' were
170 *** The function `quail-help' is no longer an interactive command.
171 Use `C-h C-\' (`describe-input-method') instead.
176 *** ImageMagick images now support the :max-width and :max-height keywords.
179 *** When using `create-image' with image data, you can pass a :format
180 attribute (via the property-list argument) in order to help
181 ImageMagick detect the image type. The value should be a MIME
182 content-type that is found in the new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
191 *** New hooks `focus-in-hook', `focus-out-hook'.
192 These are normal hooks run when an Emacs frame gains or loses input focus.
195 *** Emacs can now draw dividers between adjacent windows.
196 To put dividers between side-by-side/vertically stacked windows
197 customize the frame parameter `right-divider-width'/`bottom-divider-width'
198 to some positive integer. You can drag dividers with the mouse
199 (they show a corresponding cursor when the mouse hovers over them).
200 You can change the appearance of dividers by customizing the faces
201 `window-divider', `window-divider-first-pixel', and
202 `window-divider-last-pixel'. The last two are useful to provide a 3D
203 effect, or to better distinguish dividers from surrounding display objects.
206 *** `split-window' is now a non-interactive function, not a command.
207 As a command, it was a special case of `C-x 2' (`split-window-below'),
208 and as such superfluous. After being reimplemented in Lisp, its
209 interactive form was mistakenly retained.
212 *** New option `scroll-bar-adjust-thumb-portion'.
213 Available only on X, this option allows to control over-scrolling
214 using the scroll bar (i.e. dragging the thumb down even when the end
215 of the buffer is visible).
217 ** Lisp evaluation changes
219 *** `eval-defun' on an already defined defcustom calls the :set function,
223 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
224 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
225 zero prefix argument. This disables truncation of lists in the output,
226 equivalent to setting `(eval-expression-)print-length' and
227 `(eval-expression-)print-level' to nil. Additionally, it causes integers
228 to be printed in other formats (octal, hexadecimal, and character).
231 *** New hook `eval-expression-minibuffer-setup-hook' run by
232 `eval-expression' on entering the minibuffer.
235 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
238 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
239 because it affects caching of paragraph scanning results as well.
240 There is no reason to set this to nil except for debugging purposes.
243 ** The option `set-mark-default-inactive' has been deleted.
244 This unfinished feature was introduced by accident in Emacs 23.1;
245 simply disabling Transient Mark mode does the same thing.
247 ** The default value of `comment-use-global-state' is now t,
248 and this variable has been marked obsolete.
251 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
252 and works for git too, if you fetch the repository notes.
254 ** `read-regexp-defaults-function' defines a function to provide default
255 values for reading regexps by commands like `rgrep', `lgrep' `occur',
256 `highlight-regexp', etc. You can customize this to specify a function
257 that provides a default value from the regexp last history element,
258 or from the symbol found at point.
261 ** New option `load-prefer-newer' affects how the `load' function chooses
262 the file to load. If this is non-nil, then when both .el and .elc
263 versions of a file exist, and the caller did not explicitly specify
264 which one to load, then the newer file is loaded. The default, nil,
265 means to always load the .elc file.
268 * Editing Changes in Emacs 24.4
270 ** Indentation changes
273 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
274 When invoked without a prefix argument, it now activates a transient
275 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
276 the text indentation in the region. Typing any other key resumes
277 normal editing behavior.
279 *** `electric-indent-mode' is enabled by default.
282 *** `tab-stop-list' is now implicitly extended to infinity by repeating
283 the last step. Its default value is changed to nil, which means a tab
284 stop every `tab-width' columns.
287 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
288 When called in succession, it cycles between spacing conventions:
289 one space, no spaces, original spacing.
292 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
293 a line after a one-letter word, which is an error in some typographical
294 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
297 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
299 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
300 Most commands are still unaware of it, but kill/yank do work on the rectangle.
303 ** New option `visual-order-cursor-movement'.
304 If this is non-nil, cursor motion with arrow keys will follow the
305 visual order of characters on the screen: <left> always moves to the
306 left, <right> always moves to the right, disregarding the surrounding
307 bidirectional context.
312 *** All interactive commands that read a register (`copy-to-register', etc.)
313 now display a temporary window after `register-preview-delay' seconds
314 that summarizes existing registers. To disable this, set that option to nil.
315 Interactive commands that read registers and want to make use of this
316 should use `register-read-with-preview' to read register names.
318 *** New command `frameset-to-register' bound to `C-x r f', replacing
319 `frame-configuration-to-register'. It offers similar functionality,
320 plus enhancements like the ability to restore deleted frames.
321 (`frame-configuration-to-register' still exists, but no longer has a
325 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
329 ** New command `delete-duplicate-lines'.
330 This searches the region for identical lines, and removes all but one
331 copy of each repeated line. The lines need not be sorted.
334 * Changes in Specialized Modes and Packages in Emacs 24.4
337 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
339 ~/.emacs.d/timelog replaces ~/.timelog
340 ~/.emacs.d/vip replaces ~/.vip
341 ~/.emacs.d/viper replaces ~/.viper
342 ~/.emacs.d/ido.last replaces ~/.ido.last
343 ~/.emacs.d/kkcrc replaces ~/.kkcrc
344 ~/.emacs.d/quickurls replaces ~/.quickurls
345 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
346 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
347 ~/.emacs.d/places replaces ~/.emacs-places
348 ~/.emacs.d/shadows replaces ~/.shadows
349 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
350 ~/.emacs.d/strokes replaces ~/.strokes
351 ~/.emacs.d/notes replaces ~/.notes
352 ~/.emacs.d/type-break replaces ~/.type-break
353 Also the following files used by the now obsolete otodo-mode.el:
354 ~/.emacs.d/todo-do replaces ~/.todo-do
355 ~/.emacs.d/todo-done replaces ~/.todo-done
356 ~/.emacs.d/todo-top replaces ~/.todo-top
358 ** Backtrace and debugger
361 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
362 displays of local variables.
364 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
365 the lexical environment when evaluating the code in the context at point
366 (and so allows you to access lexical variables).
369 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
372 ** Battery information can now be retrieved from BSD's `apm' utility.
375 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
377 ** Calendar and Diary
380 *** New faces `calendar-weekday-header', `calendar-weekend-header',
381 and `calendar-month-header'.
384 *** New option `calendar-day-header-array'.
387 *** New variable `diary-from-outlook-function', used by the command
388 `diary-from-outlook'.
391 *** The variable `calendar-font-lock-keywords' is obsolete.
396 *** Calc by default now uses the Gregorian calendar for all dates, and
397 uses January 1, 1 AD as its day number 1. Previously Calc used the
398 Julian calendar for dates before September 14, 1752, and it used
399 December 31, 1 BC as its day number 1; the new scheme is more
400 consistent with Calendar's calendrical system and day numbering.
403 *** The new option `calc-gregorian-switch' lets you configure if
404 (and when) Calc switches from the Julian to the Gregorian calendar.
407 *** Support for ISO 8601 dates.
413 **** The cpp-root project now supports executing a compile command.
414 It can be set through the new :compile-command slot or the
415 buffer-local variable `compile-command'.
417 **** Better selection of include directories for the 'linux' project.
418 Include directories now support out-of-tree build directories and
419 target architecture auto-detection.
423 **** Improved detection of used namespaces in current scope in C++.
425 **** Parsing of default values for variables and function arguments in C/C++.
426 They are also displayed by the summarize feature in the mode line.
428 **** Improved parsing of function pointers in C/C++.
429 This also includes parsing of function pointers as function arguments.
431 **** Parsing of C/C++ preprocessor macros that open new scope.
432 For example, this enables parsing of macros that open new namespaces.
434 **** Support for 'this' pointer in inline member functions in C++.
439 *** New macro `cl-tagbody'.
440 This executes statements while allowing for control transfer to labels.
443 *** letf is now just an alias for cl-letf.
447 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
448 Hence, you can now enable it independently from those modes, and from
449 `transient-mark-mode'.
452 *** `cua-highlight-region-shift-only' is now obsolete.
453 You can disable `transient-mark-mode' to get the same result.
455 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
460 *** Support for completion, ElDoc, and Flycheck has been added.
463 *** The current CFEngine syntax is parsed from "cf-promises -s json".
464 There is a fallback syntax available if you don't have cf-promises or
465 if your version doesn't support that option. See option `cfengine-cf-promises'.
468 ** Delete Selection mode can now be used without Transient Mark mode.
472 *** `desktop-auto-save-timeout' defines the number of seconds idle time
473 before auto-save of the desktop.
475 *** `desktop-restore-frames', enabled by default, allows saving and
476 restoring the frame/window configuration (frameset). Additional options
477 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
478 and `desktop-restore-forces-onscreen' offer further customization.
481 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
482 such as file ownership or permissions, are visible.
485 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
486 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
487 The results display in the mode line.
489 ** Electric Pair mode
491 *** New option `electric-pair-preserve-balance', enabled by default.
492 If non-nil, pairing/skipping only kicks in when that help the balance
493 of parentheses and quotes, i.e. the buffer should end up at least as
496 You can further control this behavior by adjusting the predicates
497 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
499 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
500 In `electric-pair-mode', the commands `backward-delete-char' and
501 `backward-delete-char-untabify' are now bound to electric variants
502 that delete the closer when invoked between adjacent pairs.
504 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
505 In `electric-pair-mode', inserting a newline between adjacent pairs
506 opens an extra newline after point, which is indented if
507 `electric-indent-mode' is also set.
509 *** New option `electric-pair-skip-whitespace', enabled by default.
510 This controls if skipping over closing delimiters should jump over any
511 whitespace slack. Setting it to `chomp' makes it delete this
512 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
514 *** New variables control the pairing in strings and comments.
515 You can customize `electric-pair-text-pairs' and
516 `electric-pair-text-syntax-table' to tweak pairing behavior inside
517 strings and comments.
520 ** New EPA option `epa-mail-aliases'.
521 You can set this to a list of email address aliases that `epa-mail-encrypt'
522 should use to find keys.
525 ** New ERC option `erc-accidental-paste-threshold-seconds'.
526 If set to a number, this can be used to avoid accidentally pasting large
527 amounts of data into the ERC input.
530 ** New ERT macro `skip-unless' allows skipping ERT tests.
531 See the ERT manual for details.
536 *** `eshell' now supports visual subcommands and options.
537 Eshell has been able to handle "visual" commands (interactive,
538 non-line oriented commands such as top that require display
539 capabilities not provided by eshell) by running them in an Emacs
540 terminal emulator. See `eshell-visual-commands'.
542 This feature has been extended to subcommands and options that make a
543 usually line-oriented command a visual command. Typical examples are
544 "git log" and "git <command> --help", which display their output in a
545 pager by default. See `eshell-visual-subcommands' and
546 `eshell-visual-options'.
549 *** New Eshell-Tramp module.
550 External su and sudo commands are now the default; the internal,
551 Tramp-using variants can still be used by enabling the eshell-tramp
555 ** New F90 mode option `f90-smart-end-names'.
558 Icomplete is now more similar to Ido.
561 *** Icomplete by default now applies to all forms of minibuffer completion.
562 The variable `icomplete-with-completion-tables' (now a user option)
563 controls this. To restore the old behavior, set it back to
564 '(internal-complete-buffer).
567 *** You can navigate through and select completions using the keys
568 from `icomplete-minibuffer-map'.
571 *** The string that separates potential completions is now a customizable
572 option (`icomplete-separator'). The default is " | " rather than ",".
575 *** New face `icomplete-first-match'; and new options
576 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
579 *** The option `icomplete-show-key-bindings' has been removed.
584 *** An Ido user manual is now included.
587 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
588 This means to use virtual buffers if the current ido input does not match
592 *** The variable `ido-decorations' can optionally have two new elements,
593 which are the brackets to use around the sole remaining completion.
598 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
599 visit the next image file and the previous image file in the same
600 directory, respectively.
603 *** New commands to show specific frames of multi-frame images.
604 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
605 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
608 *** New commands to speed up, slow down, or reverse animation.
609 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
610 speed up and slow down the animation. `a r' (`image-reverse-speed')
611 to reverse it and `a 0' (`image-reset-speed') to reset it.
614 *** The command `image-mode-fit-frame' deletes other windows.
615 When toggling, it restores the frame's previous window configuration.
616 It also has an optional frame argument, which can be used by Lisp
617 callers to fit the image to a frame other than the selected frame.
622 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
623 the symbol found near point.
626 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
627 will cycle through faces in `hi-lock-face-defaults' without prompting.
629 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
634 *** New Info face `info-index-match', used to highlight matches in index
635 entries displayed by `Info-index-next', `Info-virtual-index' and
639 *** The Info-edit command is obsolete. Editing Info nodes by hand
640 has not been relevant for some time.
645 *** New option `js-switch-indent-offset'.
648 *** Better indentation of multiple-variable declarations.
649 If a declaration spans several lines, variables on the following lines
650 are lined up to the first one.
653 *** Recognition and better indentation of continuations in array comprehensions.
656 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
661 *** Font locking for texinfo comments and new keywords.
663 *** Completion in Octave file buffers.
667 *** Jump to definition.
669 *** Documentation lookup/search.
672 ** OPascal mode is the new name for Delphi mode
675 *** All delphi-* variables and functions have been renamed to opascal-*.
676 Obsolete aliases exist for those likely to have been used externally.
679 *** The option `delphi-newline-always-indents' has been removed.
680 Use `electric-indent-mode' instead.
683 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
688 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
689 to filter the list of packages by a keyword.
692 *** In the `describe-package' buffer, there are now buttons listing the
693 keywords related to the package. Click on a button to see other packages
694 related to that keyword.
697 *** The format of `archive-contents' files, generated by package
698 repositories, has changed to allow a new (fifth) element in the data
699 vectors, containing an associative list with extra properties.
700 (For example, `describe-package' uses the `:url' extra property to
701 display a "Homepage" header.)
704 ** In Prolog mode, `prolog-use-smie' has been removed,
705 along with the non-SMIE indentation code.
709 *** The new command `remember-notes' creates a buffer that is saved on
710 `kill-emacs'. You can think of it as a *scratch* buffer whose content
711 is preserved. In fact, it was designed as a replacement for *scratch*
712 buffer and can be used that way by setting `initial-buffer-choice' to
713 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
714 Without the second change, the *scratch* buffer will still be there
715 for notes that do not need to be preserved.
717 *** The Remember package can now store notes in separates files.
718 You can use the new function `remember-store-in-files' within the
719 `remember-handler-functions' option. See `remember-data-directory'
720 and `remember-directory-file-name-format' for new options related to
725 *** Customize `rmail-mbox-format' to influence some minor aspects of
726 how Rmail displays non-MIME messages.
729 *** The `unrmail' command now converts from BABYL to mboxrd format,
730 rather than mboxo. Customize `unrmail-mbox-format' to change this.
735 *** Improved syntax highlighting and indentation.
738 *** New `electric-indent-mode' integration.
741 *** New option `ruby-encoding-magic-comment-style'.
744 *** New option `ruby-custom-encoding-magic-comment-template'.
747 *** New option `ruby-align-to-stmt-keywords'.
750 *** New option `ruby-align-chained-calls'.
753 *** More Ruby file types have been added to `auto-mode-alist'.
755 ** Search and Replace
758 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
759 starts a symbol (identifier) incremental search forward with the
760 symbol found near point added to the search string initially.
763 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
764 and adds it to the search string.
766 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
767 between nil and the value of the option `search-invisible' (or `open'
770 *** `query-replace' skips invisible text when `search-invisible' is nil,
771 and opens overlays with hidden text when `search-invisible' is `open'.
774 *** A negative prefix arg of replacement commands replaces backward.
775 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
776 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
779 *** By default, prefix arguments do not now terminate Isearch mode.
780 Set `isearch-allow-prefix' to nil to restore old behavior.
783 *** More Isearch commands accept prefix arguments, namely
784 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
788 *** Word search now matches whitespace at the beginning/end
789 of the search string if it contains leading/trailing whitespace.
790 In an incremental word search or when using a non-nil LAX argument
791 of `word-search-regexp', the lax matching can also match part of
792 the first word (in addition to the lax matching of the last word).
793 The same rules are now applied to the symbol search with the difference
794 that it matches symbols, and non-symbol characters between symbols.
797 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
800 ** The shell.el option `explicit-bash-args' includes --noediting by default.
801 All non-ancient Bash versions support this option.
806 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
809 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
811 ** SMIE indentation can be customized via `smie-config'.
812 Emacs can learn the appropriate indentation settings if you provide it
813 with an indented sample file.
816 ** New Term mode option `term-suppress-hard-newline'.
819 ** Todo mode has been rewritten and enhanced.
820 The Todo mode user manual describes all commands and most user
821 options. To support some of these features, a new file format is
822 used, which is incompatible with the old format; however, you can
823 convert old todo and done item files to the new format on initializing
824 the first new todo file, or at any later time with the provided
825 conversion command. The previous version of todo-mode.el has been
826 renamed to otodo-mode.el and is now obsolete. New features include:
828 *** Support for multiple todo files and archive files of done items.
830 *** Renaming, reordering, moving, merging, and deleting categories.
832 *** Sortable tabular summaries of categories and the item types they contain.
834 *** Cross-category lists of items filtered by specific criteria.
836 *** More fine-grained interaction with the Emacs diary, by being able to
837 decide for each todo item whether it appears in the Fancy Diary display.
839 *** Highly flexible new item insertion and item editing.
841 *** Moving items between categories, storing done items in their category
842 or in archive files, undoing or unarchiving done items.
844 *** Reprioritizing items by inputting a numerical priority.
846 *** Extensive customizability of operation and display, including many faces.
851 *** `trace-function' and `trace-function-background' no longer prompt for
852 the output buffer. Unless you use a prefix argument, they output to
856 *** With a prefix argument, `trace-function' and `trace-function-background'
857 will prompt for a "context". This is a Lisp expression, whose value at the
858 time the function is entered/exited is printed along with the function's
864 *** The experimental url syntax for remote file names has been removed.
867 *** New connection method "adb", which allows to access Android
868 devices by the Android Debug Bridge. The variable `tramp-adb-program'
869 can be used to adapt the path of the "adb" program, if needed.
872 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
873 "scpc" and "rsyncc" are discontinued. The ssh option
874 "ControlMaster=auto" is set automatically in all ssh-based methods,
875 when possible. See `tramp-use-ssh-controlmaster-options'.
878 *** Handlers for `file-acl' and `set-file-acl' for remote machines
879 which support POSIX ACLs.
882 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
883 for remote machines which support filesystem notifications.
886 ** New URL command `url-cookie-list' displays the current cookies,
887 and allows you to interactively remove cookies.
889 ** VC and related modes
892 *** In VC directory mode, `D' displays diffs between VC-controlled
893 whole tree revisions.
896 *** In VC directory mode, `L' lists the change log for the current VC
897 controlled tree in a window.
900 *** In VC directory mode, `I' shows a log of changes that will be
901 received with a pull operation.
904 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
905 under current version control system. When called with a prefix
906 argument, you can remove a file from the ignored file list.
911 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
914 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
917 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
918 are obsolete. Customize the `woman-*' faces instead.
923 *** iswitchb.el; use icomplete-mode.
926 *** longlines.el; use visual-line-mode.
935 *** terminal.el; use term.el instead.
938 *** the old version of todo-mode.el (renamed to otodo-mode.el).
941 *** xesam.el (owing to the cancellation of the XESAM project).
944 *** yow.el; use fortune.el or cookie1.el instead.
947 * New Modes and Packages in Emacs 24.4
950 ** New package `eww' is a built-in web browser.
951 It is only available if Emacs is compiled with libxml2 support.
954 ** New minor mode `superword-mode'.
955 This overrides the default word motion commands to treat "symbol_words"
956 as a single word, similar to what `subword-mode' does.
959 ** New package nadvice.el offers lighter-weight advice facilities.
962 *** add-function/remove-function, which can be used to add/remove code on any
963 function-carrying place, such as process-filters or `<foo>-function' hooks.
965 *** advice-add/advice-remove to add/remove a piece of advice on a named
966 function, much like `defadvice' does.
968 ** New package frameset.el.
969 It provides a set of operations to save a frameset (the state of all
970 or a subset of the existing frames and windows, somewhat similar to a
971 frame configuration), both in-session and persistently, and restore it
972 at some point in the future.
975 ** New package filenotify.el provides an interface for file system
976 notifications. It requires that Emacs be compiled with one of the
977 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
980 * Incompatible Lisp Changes in Emacs 24.4
983 ** `kill-region' has lost its `yank-handler' optional argument.
986 ** `(input-pending-p)' no longer runs other timers that are ready to run.
987 The new optional CHECK-TIMERS parameter allows for the prior behavior.
990 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
993 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
994 Some languages match those as »...«, and others as «...», so it is
995 better for Emacs to stay neutral by default.
998 ** In compiled Lisp files, the header no longer includes a timestamp.
1001 ** The default file coding for Emacs Lisp files is now utf-8.
1002 (See `file-coding-system-alist'.) In most cases, this change is
1003 transparent, but files that contain unusual characters without
1004 specifying an explicit coding system may fail to load with obscure
1005 errors. You should either convert them to utf-8 or add an explicit
1009 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1010 It used to disable the minor mode, major mode, and text-property keymaps,
1011 whereas now it simply has higher precedence.
1013 ** Default process filters and sentinels are not nil any more.
1014 Instead they default to a function that does what the nil value used to do.
1017 ** `read-event' does not return decoded chars in ttys any more.
1018 As was the case in Emacs 22 and before, the decoding of terminal
1019 input, according to `keyboard-coding-system', is not performed in
1020 `read-event' any more. But unlike in Emacs 22, this decoding is still
1021 done before input-decode-map, function-key-map, etc.
1024 ** The option `inhibit-local-menu-bar-menus' has been removed.
1027 ** Frame-local variables that affect redisplay do not work any more.
1028 More specifically, redisplay does not bother to check for a frame-local
1029 value when looking up variables.
1032 ** nil and "unbound" are indistinguishable in `symbol-function'.
1033 `symbol-function' does not signal a `void-function' error any more.
1034 To determine if a symbol's function definition is void, use `fboundp'.
1037 ** `defadvice' does not honor the `freeze' flag and cannot advise
1038 special-forms any more.
1041 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1042 when lexical binding is enabled. Previously, VAR was bound to nil,
1043 which often led to spurious unused-variable warnings.
1046 ** The return value of `backup-buffer' has changed.
1047 The second argument is no longer an SELinux context, instead it is an
1048 alist of extended attributes as returned by the new function
1049 `file-extended-attributes'. The attributes can be applied to another
1050 file using `set-file-extended-attributes'.
1053 ** By default `copy-file' no longer copies file permission bits to an
1054 existing destination; and it sets the file permission bits of a newly
1055 created destination to those of the source, masked by the default file
1056 permissions. To copy the file permission bits, pass t as the
1057 PRESERVE-PERMISSIONS argument of `copy-file'.
1060 ** `visited-file-modtime' now returns -1 for nonexistent files.
1061 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1062 in the presence of files with negative time stamps.
1065 ** The cars of the elements in `interpreter-mode-alist' are now
1066 treated as regexps rather than literal strings.
1069 * Lisp Changes in Emacs 24.4
1072 ** The second argument of `eval' can now specify a lexical environment.
1075 ** New functions `special-form-p' and `macrop'.
1077 ** New macro `define-alternatives' can be used to define generic commands.
1078 Generic commands are interactive functions whose implementation can be
1079 selected among several alternatives, as a matter of user preference.
1081 ** The `defalias-fset-function' property lets you catch `defalias'
1082 calls, and redirect them to your own function, instead of `fset'.
1085 ** New variable `enable-dir-local-variables'.
1086 Directory-local variables are ignored if this is nil. This may be
1087 useful for modes that want to ignore directory-locals while still
1088 respecting file-local variables.
1091 ** New function `get-pos-property'.
1093 ** Completion changes
1095 *** The separator for `completing-read-multiple' can now be a regexp.
1096 The default separator has been changed to allow surrounding spaces
1099 *** The `common-substring' arg of `display-completion-list' is obsolete.
1100 Either use `completion-all-completions', which returns highlighted
1101 strings (including for partial or substring completion), or call
1102 `completion-hilit-commonality' to add the highlight.
1104 *** New function `completion-table-with-cache' is a wrapper for
1105 `completion-table-dynamic' that caches the result of the last lookup.
1107 *** New function `completion-table-merge' to combine several
1108 completion tables by merging their completions.
1110 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1111 let you enable symbol prettification (replacing a string like "lambda" with
1112 the Greek lambda character).
1117 *** Functions to pop up menus and dialogs now work on all terminals,
1118 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1119 `message-box', `yes-or-no-p', etc.
1121 The function `display-popup-menus-p' will now return non-nil for a
1122 display or frame whenever a mouse is supported on that display or
1125 *** New hook `tty-setup-hook'.
1129 *** New display action function `display-buffer-no-window' to not
1130 display the buffer in a window.
1132 *** New display action alist entry `allow-no-window' to indicate the
1133 caller of `display-buffer' is ready to handle the case of not
1134 displaying the buffer in a window.
1136 ** New hook `pre-redisplay-function'.
1139 ** New bool-vector set operation functions
1140 *** `bool-vector-exclusive-or'
1141 *** `bool-vector-union'
1142 *** `bool-vector-intersection'
1143 *** `bool-vector-set-difference'
1144 *** `bool-vector-not'
1145 *** `bool-vector-subsetp'
1146 *** `bool-vector-count-consecutive'
1147 *** `bool-vector-count-population'
1150 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1152 ** Error-handling changes
1155 *** New function `define-error'.
1158 *** `with-demoted-errors' takes an additional argument `format'.
1161 ** New macro `with-eval-after-load'.
1162 This is like the old `eval-after-load', but better behaved.
1165 ** New library subr-x.el with miscellaneous small utility functions
1166 *** `hash-table-keys'
1167 *** `hash-table-values'
1168 *** `string-blank-p'
1169 *** `string-empty-p'
1171 *** `string-reverse'
1172 *** `string-trim-left'
1173 *** `string-trim-right'
1175 *** `string-remove-prefix'
1176 *** `string-remove-suffix'
1179 ** Obsoleted functions
1182 *** `lisp-complete-symbol'
1183 *** `field-complete'
1184 *** `minibuffer-completion-contents'
1185 *** `isearch-nonincremental-exit-minibuffer'
1186 *** `isearch-filter-visible'
1187 *** `generic-make-keywords-list'
1188 *** `get-upcase-table' (use `case-table-get-table' instead).
1190 ** `with-wrapper-hook' is obsoleted by `add-function'.
1191 The few hooks that used with-wrapper-hook are replaced as follows:
1192 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1193 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1194 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1197 ** `byte-compile-interactive-only-functions' is now obsolete.
1198 To specify that a command should only be called interactively, give it
1199 a non-nil `interactive-only' property.
1202 ** `split-string' now takes an optional argument TRIM.
1203 The value, if non-nil, is a regexp that specifies what to trim from
1204 the start and end of each substring.
1207 ** New function `string-suffix-p'.
1209 ** File-handling changes
1212 *** Support for filesystem notifications.
1213 Emacs now supports notifications of filesystem changes, such as
1214 creation, modification, and deletion of files. This requires the
1215 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1216 MS-Windows systems, this is supported for Windows XP and newer
1220 *** The 9th element returned by `file-attributes' is now unspecified.
1221 Formerly, it was t if the file's gid would change if file were deleted
1222 and recreated. This value has been inaccurate for years on many
1223 platforms, and nobody seems to have noticed or cared.
1226 *** The 6th argument to `copy-file' has been renamed to
1227 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1228 Unix file permission bits as well as SELinux context.
1231 *** The function `file-ownership-preserved-p' now has an optional
1232 argument GROUP which causes it check for file group too. This can be
1233 used in place of the 9th element of `file-attributes'.
1236 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1237 argument, with the same interpretation as the returned value of
1238 `visited-file-modtime'.
1240 ** Autorevert changes
1243 *** If Emacs is compiled with file notification support, notifications
1244 are used instead of checking the time stamp of the files. You can
1245 disable this by setting the user option `auto-revert-use-notify' to
1246 nil. Alternatively, a regular expression of directories to be
1247 excluded from file notifications can be specified by
1248 `auto-revert-notify-exclude-dir-regexp'.
1251 *** The new user option `auto-revert-remote-files' enables reversion
1252 of remote files when set to non-nil.
1256 *** The function `face-spec-set' is now like `setq' for face specs.
1257 Its third arg now accepts values specifying a face spec type (defface,
1258 custom, or override spec), and the relevant spec is set accordingly.
1261 *** New function `add-face-text-property', which can be used to
1262 conveniently prepend/append new face properties.
1264 *** Face specs set via Custom themes now replace the `defface' spec
1265 rather than inheriting from it (as do face specs set via Customize).
1267 *** New face characteristic (supports :underline (:style wave))
1268 specifies whether or not the terminal can display a wavy line.
1271 *** New face spec attribute :distant-foreground
1272 specifies foreground to use if background color is near the foreground
1273 color that would otherwise have been used.
1278 *** `image-animated-p' is now `image-multi-frame-p'.
1279 It returns non-nil for any image that contains multiple frames,
1280 whether or not it specifies a frame delay.
1283 *** New variable `image-default-frame-delay' gives the frame delay for
1284 animated images which do not specify a frame delay.
1287 *** New functions `image-current-frame' and `image-show-frame' for getting
1288 and setting the current frame of a multi-frame image.
1293 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1294 **** object-name -> eieio-object-name
1295 **** object-class -> eieio-object-class
1296 **** object-class-fast -> eieio--object-class
1297 **** object-class-name -> eieio-object-class-name
1298 **** object-name-string -> eieio-object-name-string
1299 **** object-num-slots -> eieio--object-num-slots
1300 **** object-set-name-string -> eieio-object-set-name-string
1301 **** class-of -> eieio-object-class
1302 **** class-name -> eieio-class-name
1303 **** class-parent -> eieio-class-parent
1304 **** class-parents -> eieio-class-parents
1305 **** class-parents-fast -> eieio-class-parents-fast
1306 **** class-children -> eieio-class-children
1307 **** class-num-slots -> eieio--class-num-slots
1308 **** class-precedence-list -> eieio-class-precedence-list
1309 **** class-direct-subclasses -> eieio-class-children
1310 **** class-direct-superclasses -> eieio-class-parents
1312 ** Changes in encoding and decoding of text
1315 *** New coding-system `prefer-utf-8'.
1316 This is like `undecided' but prefers UTF-8 on decoding if the text to
1317 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1318 any non-ASCII characters are automatically encoded as UTF-8.
1321 *** New attributes of coding-systems whose type is `undecided'.
1322 Two new attributes, `:inhibit-null-byte-detection' and
1323 `:inhibit-iso-escape-detection', determine how to detect encoding of
1324 text that includes null bytes and ISO-2022 escape sequences,
1325 respectively. Each of these attributes can be either nil, zero, or
1326 t. If it is t, decoding text ignores null bytes and, respectively,
1327 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1328 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1329 text is encoded in one of the ISO-2022 encodings, such as
1330 iso-2022-7bit. If the value is zero, Emacs consults the variables
1331 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1333 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1334 UTF-8 encoding and decoding, whenever possible.
1336 These attributes are only meaningful for coding-systems of type
1337 `undecided'. (The type of a coding-system is determined by its
1338 `:coding-type' attribute and can be accessed by calling the
1339 `coding-system-type' function.)
1342 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1345 ** New functions `group-gid' and `group-real-gid'.
1348 ** The spelling of the rx.el category `chinese-two-byte' has been
1349 corrected (the first 'e' was missing).
1352 ** Minor internal changes to the details of lock files.
1353 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1354 If DIR/.#FILE already exists and is not an Emacs lock file,
1355 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1356 numbered lock files DIR/.#FILE.0...).
1357 On file systems that do not support symbolic links, the lock is now a
1358 regular file with contents being what would have been in the symlink.
1360 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1363 *** The package descriptor and name of global variables, constants,
1364 and functions should be separated by two hyphens if the symbol is not
1365 meant to be used by other packages.
1368 * Changes in Emacs 24.4 on Non-Free Operating Systems
1371 ** The procedure for building Emacs on MS-Windows has changed.
1372 It is now built by running the same configure script as on all other
1373 platforms. This requires the MSYS environment and MinGW development
1374 tools. See the updated instructions in nt/INSTALL for details.
1376 Using the Posix configure script and Makefile's also means a change in
1377 the directory structure of the Emacs installation on Windows. It is
1378 now the same as on GNU and Unix systems. In particular, the auxiliary
1379 programs, such as cmdproxy.exe and hexl.exe, are in
1380 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1381 version), version-independent site-lisp is in share/emacs/site-lisp,
1382 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1383 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1384 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1385 directories and will find the files in there automatically; there's no
1386 need to set any variables due to this change.)
1389 ** Emacs on Windows 2000 and later can now access files and directories
1390 whose names cannot be encoded in the current system codepage.
1392 The new variable `w32-unicode-filenames' controls this feature: if it
1393 is t, Emacs uses Unicode APIs to pass file names to system calls,
1394 which lifts the limitation of file names to the current locale.
1397 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1398 The backtrace is written to the 'emacs_backtrace.txt' file in the
1399 directory where Emacs was running.
1402 ** The variable `buffer-file-type' is no longer supported.
1403 Setting it has no effect, and %t in the mode-line format is ignored.
1404 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1405 modifying it has no effect.
1408 ** Lock files now work on MS-Windows.
1409 This helps to prevent losing your edits if the same file is being
1410 edited in another Emacs session or by another user. See the node
1411 "Interlocking" in the Emacs User Manual for the details. To disable
1412 file locking, customize `create-lockfiles' to nil.
1414 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1415 GNUstep and Mac OS X 10.4 use the old font backend.
1416 To use the old backend by default, do on the command line:
1417 % defaults write org.gnu.Emacs FontBackend ns
1419 ** Improved fullscreen support on Mac OS X.
1420 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1421 Customize `ns-use-native-fullscreen' to change the style.
1422 For Mac OS X 10.7 and newer, native is the default.
1424 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1425 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1426 does not apply to images.
1429 * Installation Changes in Emacs 24.3
1431 ** The default X toolkit is now Gtk+ version 3.
1432 If you don't pass `--with-x-toolkit' to configure, or if you use
1433 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1434 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1435 You can explicitly require a specific version by passing
1436 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1438 ** New configure option `--enable-link-time-optimization', to utilize
1439 an appropriate feature provided by GCC since version 4.5.0.
1441 ** New configure option `--without-all' to disable most of the optional
1442 features (image support, etc.) that are normally enabled by default.
1444 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1445 Emacs). If building with GCC, this enables compile-time checks that
1446 warn/give errors about possibly-questionable C code. On a recent GNU
1447 system there should be no warnings; on older and on non-GNU systems
1448 the results may be useful to developers.
1450 ** The configure option `--enable-use-lisp-union-type' has been
1451 renamed to `--enable-check-lisp-object-type', as the resulting
1452 Lisp_Object type no longer uses a union to implement the compile time
1453 check that this option enables.
1455 ** The configure option `--disable-maintainer-mode' has been removed,
1456 as it was confusingly-named and rarely useful.
1458 ** The configure options `--program-prefix', `--program-suffix', and
1459 `--program-transform-name' apply to more than just the installed
1460 binaries. Now they also affect the man pages, icons, and the
1461 etc/emacs.desktop file; but not the info pages, since this would break
1462 links between the various manuals.
1464 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1465 overwriting "emacs" in the installation bin/ directory with a link
1468 ** Emacs uses libtinfo in preference to libncurses, if available.
1470 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1471 /usr/pkg/lib to the linker search path. You must add them yourself if
1474 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1475 (from the bin and libexec directories, respectively). The former is
1476 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1479 * Startup Changes in Emacs 24.3
1481 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1482 lisp/ directory. There should not be any there anyway. If you have
1483 been adding them there, put them somewhere else; e.g., site-lisp.
1485 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1488 * Changes in Emacs 24.3
1492 *** `C-h f' (`describe-function') can now perform autoloading.
1493 When this command is called for an autoloaded function whose docstring
1494 contains a key substitution construct, that function's library is
1495 automatically loaded, so that the documentation can be shown
1496 correctly. To disable this, set `help-enable-auto-load' to nil.
1498 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1499 even after their associated libraries have been loaded (and the
1500 autoloads have been redefined as functions).
1504 *** Images displayed via ImageMagick now support transparency and the
1505 :background image specification property.
1507 *** When available, ImageMagick support is automatically enabled.
1508 It is no longer necessary to call `imagemagick-register-types'
1509 explicitly to install ImageMagick image types; that function is called
1510 automatically at startup, or when customizing an imagemagick- option.
1512 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1513 ImageMagick to view images. (You must call `imagemagick-register-types'
1514 afterwards if you do not use customize to change this.)
1516 *** The new variable `imagemagick-enabled-types' also affects which
1517 ImageMagick types are treated as images. The function
1518 `imagemagick-filter-types' returns the list of types that will be
1523 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1524 next and previous path separator, respectively.
1526 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1527 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1528 non-nil before enabling the mode.
1532 *** New option `mode-line-default-help-echo' specifies the help text
1533 (shown in a tooltip or in the echo area) for any part of the mode line
1534 that does not have its own specialized help text.
1536 *** You can now click mouse-3 in the coding system indicator to invoke
1537 `set-buffer-file-coding-system'.
1539 ** Server and client
1541 *** emacsclient now obeys string values for `initial-buffer-choice',
1542 if it is told to open a new frame without specifying any file to visit
1543 or expression to evaluate.
1545 *** New option `server-auth-key' specifies a shared server key.
1547 ** Emacs now generates backtraces on fatal errors.
1548 On encountering a fatal error, Emacs now outputs a textual description
1549 of the fatal signal, and a short backtrace on platforms like glibc
1550 that support backtraces.
1552 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1553 This minor mode replaces `toggle-read-only', which is now obsolete.
1555 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1556 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1557 respectively, without exiting from the prompt.
1559 ** In the Package Menu, newly-available packages are listed as "new",
1560 and sorted above the other "available" packages by default.
1562 ** If your Emacs was built from a repository checkout, the new variable
1563 `emacs-bzr-version' contains information about the bzr revision used.
1565 ** New option `create-lockfiles' specifies usage of lockfiles.
1566 It defaults to t. Changing it to nil inhibits the creation of lock
1567 files (use this with caution).
1569 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1570 variables on remote hosts.
1572 ** The entry for PCL-CVS has been removed from the Tools menu.
1573 The PCL-CVS commands are still available via the keyboard.
1575 ** Using "unibyte: t" in Lisp source files is obsolete.
1576 Use "coding: raw-text" instead.
1578 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1579 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1580 The previous binding, introduced in Emacs 24.1, was a mistake, because
1581 `C-c LETTER' bindings are reserved for user customizations.
1583 ** Internationalization
1585 *** New language environment: Persian.
1587 *** New input method `vietnamese-vni'.
1589 ** Nextstep (GNUstep / Mac OS X) port
1591 *** Support for fullscreen and the frame parameter fullscreen.
1593 *** A file dialog is used for open/save operations initiated from the
1597 * Editing Changes in Emacs 24.3
1599 ** Search and Replace
1601 *** Non-regexp Isearch now performs "lax" space matching.
1602 Each sequence of spaces in the supplied search string may match any
1603 sequence of one or more whitespace characters, as specified by the
1604 variable `search-whitespace-regexp'. (This variable is also used by a
1605 similar existing feature for regexp Isearch.)
1607 *** New Isearch command `M-s SPC' toggles lax space matching.
1608 This applies to both ordinary and regexp Isearch.
1610 *** New option `replace-lax-whitespace'.
1611 If non-nil, `query-replace' uses flexible whitespace matching too.
1614 *** Global `M-s _' starts a symbol (identifier) incremental search,
1615 and `M-s _' in Isearch toggles symbol search mode.
1616 `M-s c' in Isearch toggles search case-sensitivity.
1618 ** Navigation commands
1620 *** New binding `M-g c' for `goto-char'.
1622 *** New binding `M-g TAB' for `move-to-column'.
1624 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1625 interactively with no prefix arg. Previously, it moved to column 1.
1627 ** New option `yank-handled-properties' allows processing of text
1628 properties on yanked text, in ways that are more general than just
1629 removing them (as is done by `yank-excluded-properties').
1631 ** New option `delete-trailing-lines' specifies whether
1632 M-x delete-trailing-whitespace should delete trailing lines at the end
1633 of the buffer. It defaults to t.
1635 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1637 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1638 `ucs-insert' is now an obsolete alias for `insert-char'.
1640 ** The `z' key no longer has a binding in most special modes.
1641 It used to be bound to `kill-this-buffer', but `z' is too easy to
1644 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1645 It copies the region-rectangle as the last rectangle kill.
1649 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1651 *** New option `register-separator' specifies the register containing
1652 the text to put between collected texts for use with
1653 M-x append-to-register and M-x prepend-to-register.
1656 * Changes in Specialized Modes and Packages in Emacs 24.3
1658 ** Common Lisp emulation (CL)
1660 *** CL's main entry is now (require 'cl-lib).
1661 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1662 i.e., all its definitions have the "cl-" prefix (and internal definitions
1663 use the "cl--" prefix).
1665 If `cl' provided a feature under the name `foo', then `cl-lib'
1666 provides it under the name `cl-foo' instead; with the exceptions of the
1667 few `cl' definitions that had to use `foo*' to avoid conflicts with
1668 pre-existing Elisp entities. These have been renamed to `cl-foo'
1669 rather than `cl-foo*'.
1671 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1672 provide the old, non-prefixed names. Some exceptions are listed below:
1674 *** `cl-flet' is not like `flet' (which is deprecated).
1675 Instead it obeys the behavior of Common-Lisp's `flet'.
1676 In particular, in cl-flet function definitions are lexically scoped,
1677 whereas in flet the scoping is dynamic.
1679 *** `cl-labels' is slightly different from `labels'.
1680 The difference is that it relies on the `lexical-binding' machinery
1681 (as opposed to the `lexical-let' machinery used previously) to capture
1682 definitions in closures, so such closures will only work if `lexical-binding'
1685 *** `cl-letf' is not exactly like `letf'.
1686 The only difference is in details that relate to some deprecated usage
1687 of `symbol-function' in place forms.
1689 *** `progv' was rewritten to use the `let' machinery.
1690 A side effect is that variables without corresponding values are bound
1691 to nil rather than being made unbound.
1693 *** The following methods of extending `setf' are obsolete
1694 (use features from gv.el instead):
1695 `define-modify-macro' (use `gv-letplace')
1696 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1697 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1698 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1702 *** Changes are now highlighted using the same color scheme as in
1703 modern VCSes. Deletions are displayed in red (new faces
1704 `diff-refine-removed' and `smerge-refined-removed', and new definition
1705 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1706 and `smerge-refined-added', and new definition of `diff-added').
1708 *** The variable `diff-use-changed-face' defines whether to use the
1709 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1710 changes in context diffs.
1712 *** The new command `diff-delete-trailing-whitespace' removes trailing
1713 whitespace introduced by a diff.
1715 ** Ediff now uses the same color scheme as Diff mode.
1719 A new version of python.el, which provides several new features, including:
1720 per-buffer shells, better indentation, Python 3 support, and improved
1721 shell-interaction compatible with iPython (and virtually any other
1724 *** Some user options have been replaced/renamed, including (old -> new):
1725 **** python-indent -> python-indent-offset
1726 **** python-guess-indent -> python-indent-guess-indent-offset
1727 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1728 **** python-use-skeletons -> python-skeleton-autoinsert
1730 *** Some user options have been removed, including:
1732 **** `python-indent-string-contents': Strings are never indented.
1734 **** `python-honour-comment-indentation':
1735 Comments are always considered as indentation markers.
1737 **** `python-continuation-offset': Indentation is automatically
1738 calculated in a pep8 compliant way depending on the context.
1740 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1741 Have no direct mapping as the shell interaction is completely different.
1743 **** `python-python-command', `python-jython-command':
1744 Replaced by `python-shell-interpreter'.
1746 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1747 `python-pdbtrack-minor-mode-string', `python-source-modes':
1750 *** Some commands have been replaced (old -> new):
1751 **** python-insert-class -> python-skeleton-class
1752 **** python-insert-def -> python-skeleton-def
1753 **** python-insert-for -> python-skeleton-for
1754 **** python-insert-if -> python-skeleton-if
1755 **** python-insert-try/except -> python-skeleton-try
1756 **** python-insert-try/finally -> python-skeleton-try
1757 **** python-insert-while -> python-skeleton-while
1758 **** python-find-function -> python-nav-jump-to-defun
1759 **** python-next-statement -> python-nav-forward-sentence
1760 **** python-previous-statement -> python-nav-backward-sentence
1761 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1762 **** python-end-of-defun-function -> python-nav-end-of-defun
1763 **** python-send-buffer -> python-shell-send-buffer
1764 **** python-send-defun -> python-shell-send-defun
1765 **** python-send-region -> python-shell-send-region
1766 **** python-send-region-and-go -> emulate with python-shell-send-region
1767 and python-shell-switch-to-shell
1768 **** python-send-string -> python-shell-send-string
1769 **** python-switch-to-python -> python-shell-switch-to-shell
1770 **** python-describe-symbol -> python-eldoc-at-point
1774 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1776 *** The D-Bus object manager interface is implemented.
1778 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1779 if their value does not fit into Emacs's integer range.
1781 *** The function `dbus-call-method' is now non-blocking.
1782 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1784 *** Signals can also be sent as unicast messages.
1786 *** The argument list of `dbus-register-signal' has been extended,
1787 according to the new match rule types of D-Bus.
1789 *** `dbus-init-bus' supports private connections.
1791 *** There is a new function `dbus-setenv'.
1793 ** `desktop-path' no longer includes the "." directory.
1794 Desktop files are now located in ~/.emacs.d by default.
1798 *** `dired-do-async-shell-command' executes each file sequentially
1799 if the command ends in `;' (when operating on multiple files).
1800 Otherwise, it executes the command on each file in parallel.
1802 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1803 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1806 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1807 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1808 mark/unmark/flag all files in the active region.
1810 *** The minibuffer default for `=' (`dired-diff') has changed.
1811 It is now the backup file for the file at point, if one exists.
1812 In Transient Mark mode the default is the file at the active mark.
1814 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1815 The global binding for `M-=', `count-words-region' is in effect.
1819 *** New module "notifications", which can send a notification when you
1820 receive a private message or your nickname is mentioned.
1822 *** ERC will look up server/channel names via auth-source and use any
1825 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1826 only applies to messages sent by lurkers.
1828 ** reStructuredText mode
1830 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1831 fontification, comment handling, and customization have all been revised
1834 *** Support for `imenu' and `which-function-mode'.
1836 *** The reStructuredText syntax is more closely covered.
1837 Sphinx support has been improved.
1839 *** `rst-insert-list' inserts new list or continues existing lists.
1841 *** A negative prefix argument always works for `rst-adjust'.
1843 *** The window configuration is reset after displaying a TOC.
1845 *** The constant `rst-version' describes the rst.el package version.
1849 *** Support for percent literals and recognition of regular expressions
1850 in method calls without parentheses with more methods, including Cucumber
1853 *** Improved syntax highlighting and indentation.
1855 *** New command `ruby-toggle-block', bound to `C-c {'.
1857 *** Some non-standard keybindings/commands have been removed:
1859 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1861 **** `ruby-mark-defun'; use `mark-defun'.
1863 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1864 appropriate settings for the variables `beginning-of-defun-function'
1865 and `end-of-defun-function'.
1867 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1868 `reindent-then-newline-and-indent' and `newline' have been removed.
1870 ** Shell Script mode
1872 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1874 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1876 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1880 *** The free software compiler GHDL is supported (and now the default).
1882 *** Support for the VHDL-AMS packages has been added/updated.
1884 *** Updated to the 2002 revision of the VHDL standard.
1886 *** Accepts \r and \f as whitespace.
1890 *** The faces used by Apropos are now directly customizable.
1891 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1892 see the `apropos' Custom group for details.
1894 *** The old options whose values specified faces to use have been removed
1895 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1896 `apropos-match-face' and `apropos-property-face'.).
1900 *** This package has been rewritten to use Tabulated List mode.
1902 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1903 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1907 *** Algebraic simplification mode is now the default.
1908 To restrict to the limited simplifications given by the former
1909 default simplification mode, use `m I'.
1913 *** You can customize the header text that appears above each calendar month.
1914 See the variable `calendar-month-header'.
1916 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1918 *** The calendars produced by cal-html include holidays.
1919 Customize `cal-html-holidays' to change this.
1923 *** The major modes from the parser generators "Bovine" and "Wisent"
1924 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1925 are in `auto-mode-alist', and the corresponding manuals are included.
1929 **** Menu support for the "Configuration" feature. This allows users to
1930 choose the active configuration (such as debug or install) from the menu.
1932 **** New command `ede-set' to interactively set project-local variables.
1934 **** Support for compiling, debugging, and running in "generic" projects.
1936 **** Autoconf editing support for M4 macros with complex arguments.
1938 **** Compilation support for the "linux" project type.
1940 **** "simple" projects have been removed; use "generic" projects instead.
1944 **** Support for parsing #include statements inside a namespace in C/C++.
1946 **** Improved support for 'extern "C"' declarations in C/C++.
1948 **** The ability to ignore more common special C/C++ preprocessor symbols,
1949 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1950 If available, include cdefs.h as an additional source of preprocessor symbols.
1952 **** Improved C/C++ function pointer parsing.
1954 **** In Python, support for converting imports to include file names.
1956 **** Ability to dynamically determine the Python load path.
1958 **** Support for the Python 'WITH' and 'AT' keywords.
1960 **** Improved tooltip completion.
1964 **** The SRecode manual is now included.
1966 **** Tag generation supports constructor/destructor settings and system
1967 include differentiation.
1969 **** Addition of 'Framework' support: Frameworks are specified when a
1970 particular kind of library (such as Android) is needed in a common language
1973 **** Support for nested templates and let variables override based on priority.
1975 **** Support for merging tables from multiple related modes, such as
1976 default -> c++ -> arduino.
1978 ** Compile has a new option `compilation-always-kill'.
1982 *** `custom-reset-button-menu' now defaults to t.
1984 *** Non-option variables are never matched in `customize-apropos' and
1985 `customize-apropos-options' (i.e., the prefix argument does nothing for
1986 these commands now).
1990 *** The variables `term-default-fg-color' and `term-default-bg-color'
1991 are now deprecated in favor of the customizable face `term'.
1993 *** You can customize how to display ANSI terminal colors and styles
1994 by customizing the corresponding `term-color-<COLOR>',
1995 `term-color-underline' and `term-color-bold' faces.
1999 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2001 *** Remote processes are now also supported on remote MS-Windows hosts.
2005 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2006 Previously, this slot stored semicolon-separated attribute-value pairs
2007 appended to some imap URLs, but this is not compatible with RFC 3986.
2008 So now the `filename' slot stores the entire path and query components,
2009 and the `attributes' slot is always nil.
2011 *** New function `url-encode-url' for encoding a URI string.
2012 The `url-retrieve' function now uses this to encode its URL argument,
2013 in case that is not properly encoded.
2015 ** notifications.el supports now version 1.2 of the Notifications API.
2016 The function `notifications-get-capabilities' returns the supported
2019 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2020 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2021 `flymake-warning-bitmap'.
2023 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2024 specifying URL types that should be converted to remote file names at
2025 the FFAP prompt. The default is now '("ftp").
2027 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2028 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2030 ** New option `mouse-avoidance-banish-position' specifies where the
2031 `banish' mouse avoidance setting moves the mouse.
2033 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2034 closing brackets to be aligned with the line of the opening bracket.
2036 ** In Proced mode, new command `proced-renice' renices marked processes.
2038 ** New option `async-shell-command-buffer' specifies the buffer to use
2039 for a new asynchronous `shell-command' when the default output buffer
2040 `*Async Shell Command*' is already in use.
2042 ** SQL mode has a new option `sql-db2-escape-newlines'.
2043 If non-nil, newlines sent to the command interpreter will be escaped
2044 by a backslash. The default does not escape the newlines and assumes
2045 that the sql statement will be terminated by a semicolon.
2047 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2048 (and modes that derive from it), sorts the column at point, or the Nth
2049 column if a numeric prefix argument is given.
2051 ** `which-func-modes' now defaults to t, so Which Function mode, when
2052 enabled, applies to all applicable major modes.
2054 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2057 ** Follow mode no longer works by using advice.
2058 The option `follow-intercept-processes' has been removed.
2060 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2062 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2063 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2064 *** semantic-change-hooks -> semantic-change-functions
2065 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2066 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2067 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2068 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2069 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2070 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2071 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2072 *** rcirc-activity-hooks -> rcirc-activity-functions
2073 *** rcirc-print-hooks -> rcirc-print-functions
2074 *** dbus-event-error-hooks -> dbus-event-error-functions
2075 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2076 *** checkdoc-style-hooks -> checkdoc-style-functions
2077 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2078 *** archive-extract-hooks -> archive-extract-hook
2079 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2080 *** hfy-post-html-hooks -> hfy-post-html-hook
2081 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2082 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2083 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2084 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2086 ** Obsolete packages
2089 In most cases, assoc+member+push+delq work just as well.
2090 And in any case it's just a terrible package: ugly semantics, terrible
2091 inefficiency, and not namespace-clean.
2100 * Incompatible Lisp Changes in Emacs 24.3
2102 ** Docstrings starting with `*' no longer indicate user options.
2103 Only variables defined using `defcustom' are considered user options.
2104 The function `user-variable-p' is now an obsolete alias for
2105 `custom-variable-p'.
2107 ** The return values of `defalias', `defun' and `defmacro' have changed,
2108 and are now undefined. For backwards compatibility, `defun' and
2109 `defmacro' currently return the name of the newly defined
2110 function/macro, but this should not be relied upon.
2112 ** `random' by default now returns a different random sequence in
2113 every Emacs run. Use `(random S)', where S is a string, to set the
2114 random seed to a value based on S, in order to get a repeatable
2115 sequence in later calls.
2117 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2118 that substring is inserted literally even if the LITERAL arg is
2119 non-nil, instead of causing an error to be signaled.
2121 ** `select-window' now always makes the window's buffer current.
2122 It does so even if the window was selected before.
2124 ** The function `x-select-font' can return a font spec, instead of a
2125 font name as a string. Whether it returns a font spec or a font name
2126 depends on the graphical library.
2128 ** `face-spec-set' no longer sets frame-specific attributes when the
2129 third argument is a frame (that usage was obsolete since Emacs 22.2).
2131 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2133 ** The CL package's `get-setf-method' function no longer exists.
2134 Generalized variables are now part of core Emacs Lisp, and implemented
2135 differently to the way cl.el used to do it. It is not possible to
2136 define a compatible replacement for `get-setf-method'. See the file
2137 gv.el for internal details of the new implementation.
2139 ** The arguments of `dbus-register-signal' are no longer just strings,
2140 but keywords or keyword-string pairs. The old argument list will
2141 still be supported for Emacs 24.x.
2143 ** Miscellaneous name changes
2144 Some Lisp symbols have been renamed to correct their spelling,
2145 or to be more consistent with standard Emacs terminology.
2147 *** Renamed functions
2148 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2149 **** inactivate-input-method -> deactivate-input-method
2150 **** quail-inactivate -> quail-deactivate
2151 **** robin-inactivate -> robin-deactivate
2152 **** viper-inactivate-input-method -> viper-deactivate-input-method
2153 **** viper-inactivate-input-method-action ->
2154 viper-deactivate-input-method-action
2155 **** ucs-input-inactivate -> ucs-input-deactivate
2158 The old hooks are still supported for backward compatibility, but they
2159 are deprecated and will be removed eventually.
2160 **** input-method-inactivate-hook -> input-method-deactivate-hook
2161 **** robin-inactivate-hook -> robin-deactivate-hook
2162 **** quail-inactivate-hook -> quail-deactivate-hook
2164 *** Renamed variables
2165 **** follow-deactive-menu -> follow-inactive-menu
2166 **** inactivate-current-input-method-function ->
2167 deactivate-current-input-method-function
2169 ** Some obsolete functions, variables, and faces have been removed:
2170 *** `last-input-char', `last-command-char', `unread-command-char'
2171 *** `facemenu-unlisted-faces'
2172 *** `rmail-decode-mime-charset'
2173 *** `iswitchb-read-buffer'
2174 *** `sc-version', `sc-submit-bug-report'
2175 *** `set-char-table-default'
2176 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2177 *** `compile-internal'
2179 *** `mode-line-inverse-video'
2180 *** `follow-mode-off-hook'
2181 *** `cvs-commit-buffer-require-final-newline'
2182 (use `log-edit-require-final-newline' instead)
2183 *** `cvs-changelog-full-paragraphs'
2184 (use `log-edit-changelog-full-paragraphs' instead)
2185 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2186 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2187 *** `vc-master-templates' (use `vc-handled-backends' instead)
2188 *** `vc-checkout-carefully'
2191 * Lisp Changes in Emacs 24.3
2193 ** CL-style generalized variables are now in core Elisp.
2194 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2195 You can define your own generalized variables using `gv-define-simple-setter',
2196 `gv-define-setter', etc.
2198 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2199 This can significantly speed up execution of non-byte-compiled code,
2200 but can also bump into previously unnoticed cyclic dependencies.
2201 These are generally harmless: they will simply cause the macro calls
2202 to be left for later expansion (as before), but will result in a
2203 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2204 You may wish to restructure your code so this does not happen.
2206 ** New sampling-based Elisp profiler.
2207 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2208 When finished, use M-x profiler-stop. The sampling rate can be based on
2209 CPU time or memory allocations.
2211 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2212 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2214 ** New macros `setq-local' and `defvar-local'.
2216 ** Face underlining can now use a wave.
2218 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2219 of `read-regexp' accepts a string ending with a colon and space, and its
2220 second argument DEFAULTS can be a list of strings accessible via `M-n'
2221 in the minibuffer ahead of other hard-coded useful regexp-related values.
2222 More commands use `read-regexp' now to read their regexp arguments.
2226 *** New function `completion-table-with-quoting' to handle completion
2227 in the presence of quoting, such as file completion in shell buffers.
2229 *** New function `completion-table-subvert' to use an existing completion
2230 table, but with a different prefix.
2234 *** New error type and new function `user-error'.
2235 These do not trigger the debugger.
2237 *** New option `debugger-bury-or-kill', saying what to do with the
2238 debugger buffer when exiting debug.
2240 *** Set `debug-on-message' to enter the debugger when a certain
2241 message is displayed in the echo area. This can be useful when trying
2242 to work out which code is doing something.
2244 *** New var `inhibit-debugger', automatically set to prevent accidental
2245 recursive invocations.
2249 *** New command `fit-frame-to-buffer' adjusts the frame height to
2252 *** The command `fit-window-to-buffer' can adjust the frame height
2253 if the new option `fit-frame-to-buffer' is non-nil.
2255 *** New macro `with-temp-buffer-window', similar to
2256 `with-output-to-temp-buffer'.
2258 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2261 *** New option `switch-to-buffer-preserve-window-point' to restore a
2262 window's point when switching buffers.
2264 *** New display action alist entries `window-height' and `window-width'
2265 specify the size of new windows created by `display-buffer'.
2267 *** New display action alist entry `pop-up-frame-parameters', if
2268 non-nil, specifies frame parameters to give any newly-created frame.
2270 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2271 tells display action functions to avoid changing which frame is
2274 *** New display action alist entry `previous-window', if non-nil,
2275 specifies window to reuse in `display-buffer-in-previous-window'.
2277 *** New display action functions `display-buffer-below-selected',
2278 and `display-buffer-in-previous-window'.
2280 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2281 now accept a third argument to avoid choosing the selected window.
2283 *** Additional values recognized for option `window-combination-limit'.
2285 *** The following variables are obsolete, as they can be replaced by
2286 appropriate entries in the `display-buffer-alist' function introduced
2288 **** `dired-shrink-to-fit'
2289 **** `display-buffer-reuse-frames'
2290 **** `display-buffer-function'
2291 **** `special-display-buffer-names'
2292 **** `special-display-frame-alist'
2293 **** `special-display-function'
2294 **** `special-display-regexps'
2298 *** `current-time-string' no longer requires that its argument's year
2299 must be in the range 1000..9999. It now works with any year supported
2300 by the underlying C implementation.
2302 *** `current-time' now returns extended-format time stamps
2303 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2304 PSEC is typically a multiple of 1000 on current machines. Other
2305 functions that use this format, such as `file-attributes' and
2306 `format-time-string', have been changed accordingly. Old-format time
2307 stamps are still accepted.
2309 *** The format of timers in `timer-list' and `timer-idle-list' is now
2310 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2311 The PSECS slot is new, and uses picosecond resolution. It can be
2312 accessed via the new `timer--psecs' accessor.
2314 *** Last-modified time stamps in undo lists now are of the form
2315 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2319 *** Improved security when handling persistent objects:
2321 **** `eieio-persistent-read' now features optional arguments for specifying
2322 the class to load, as well as a flag stating whether subclasses are allowed;
2323 if provided, other classes will be rejected by the reader. For
2324 compatibility with existing code, if the class is omitted only a
2327 **** New specialized reader for pulling in classes and signaling errors
2328 without evaluation of suspicious code.
2330 **** All slots that contain objects must have a :type. Slots with lists
2331 of objects must use a new type predicate for a list of an object type.
2333 *** Support for `find-function' and similar utilities, through the addition
2334 of filename support to generated symbols.
2336 ** Floating point functions now always return special values like NaN,
2337 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2338 Previously, they returned NaNs on some platforms but signaled errors
2339 on others. The affected functions are acos, asin, tan, exp, expt,
2340 log, log10, sqrt, and mod.
2342 ** New fringe bitmap `exclamation-mark'.
2344 ** Miscellaneous changes to special forms and macros
2346 *** `defun' and `defmacro' are now macros rather than special forms.
2348 *** `kbd' is now a function rather than a macro.
2350 ** Miscellaneous new functions
2352 *** `set-temporary-overlay-map' sets up a temporary keymap that
2353 takes precedence over most other maps for a short while (normally one key).
2355 *** `autoloadp' tests if its argument is an autoloaded object.
2357 *** `autoload-do-load' performs the autoloading operation.
2359 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2361 *** `file-name-base' returns a file name sans directory and extension.
2363 *** `function-get' fetches a function property, following aliases.
2365 *** `posnp' tests if an object is a `posn'.
2367 *** `system-users' returns the user names on the system.
2369 *** `system-groups' returns the group names on the system.
2371 *** `tty-top-frame' returns the topmost frame of a text terminal.
2373 ** The following functions and variables are obsolete:
2374 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2375 *** `buffer-has-markers-at'
2376 *** `macro-declaration-function' (use `macro-declarations-alist')
2377 *** `window-system-version' (provides no useful information)
2378 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2379 *** `query-replace-interactive'
2380 *** `font-list-limit' (has had no effect since Emacs < 23)
2383 * Changes in Emacs 24.3 on Non-Free Operating Systems
2385 ** Cygwin builds can use the native MS Windows user interface.
2386 Pass `--with-w32' to configure. The default remains the X11 interface.
2388 ** Two new functions are available in Cygwin builds:
2389 `cygwin-convert-file-name-from-windows' and
2390 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2391 code to access the Cygwin file-name mapping machinery to convert
2392 between Cygwin and Windows-native file and directory names.
2394 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2395 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2396 `mouse-autoselect-window'.
2398 ** On MS Windows Vista and later Emacs now supports symbolic links.
2400 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2401 support for libxml2, even if its presence is detected.
2403 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2405 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2406 directories to the search path. You must add them yourself if you want them.
2409 * Changes in Emacs 24.2
2411 ** This is mainly a bug-fix release.
2414 * Installation Changes in Emacs 24.1
2416 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2417 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2418 also depend on Gtk+. You can disable them with --without-rsvg and
2421 ** Emacs can be compiled with GnuTLS support.
2422 This happens by default if a suitably recent version of the library is
2423 found at build time. To prevent this, use the configure option
2424 `--without-gnutls'. See below for GnuTLS features.
2426 ** Emacs can be compiled with SELinux support.
2427 This happens by default if a suitably recent version of the library is
2428 found at build time. To prevent this, use the configure option
2429 `--without-selinux'. See below for SELinux features.
2431 ** Emacs can be compiled with ImageMagick support.
2432 This happens by default if a suitably recent version of the library is
2433 found at build time. To prevent this, use the configure option
2434 `--without-imagemagick'. See below for ImageMagick features.
2435 This feature is not available for the Nextstep or MS ports.
2437 ** Emacs can be compiled with libxml2 support.
2438 This happens by default if a suitably recent version of the library is
2439 found at build time. To prevent this, use the configure option
2440 `--without-xml2'. See below for libxml2 features.
2442 ** By default, the installed Info and man pages are compressed.
2443 You can disable this by configuring --without-compress-info.
2445 ** New configure option --with-wide-int.
2446 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2447 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2450 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2451 These provide no new functionality, they just remove the need to edit
2452 lib-src/Makefile by hand in order to use the associated features.
2454 ** New configure option --enable-use-lisp-union-type.
2455 This is only useful for Emacs developers to debug certain types of bugs.
2456 This is not a new feature; only the configure flag is new.
2458 ** The standalone programs digest-doc and sorted-doc are removed.
2459 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2461 ** The standalone program `fakemail' is removed.
2462 If you need it, feedmail.el provides a superset of the functionality.
2465 * Startup Changes in Emacs 24.1
2467 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2468 command line arguments, and the EMACS_UNIBYTE environment variable, no
2469 longer have any effect. (They were declared obsolete in Emacs 23.)
2471 ** New command line option `--no-site-lisp' removes site-lisp directories
2472 from load-path. -Q now implies this. This option does not affect the
2473 EMACSLOADPATH environment variable (and hence has no effect for
2477 * Changes in Emacs 24.1
2481 *** Many packages now use the `completion-at-point' command,
2482 rather than implementing separate completion commands.
2484 *** `completion-at-point' now handles tags and semantic completion.
2486 *** Completion in a non-minibuffer now tries to detect the end of completion
2487 and pops down the *Completions* buffer accordingly.
2489 *** New option `completion-cycle-threshold' allows completion cycling.
2491 *** New option `completion-category-overrides' for overriding the
2492 default completion style in certain circumstances.
2494 *** New completion style `substring'.
2496 *** Completion of buffer names uses `substring' completion by default.
2498 *** The option `widget-complete-field' has been removed.
2502 *** The first time you try sending mail, Emacs asks for a mail method.
2503 This is implemented by a new default for `send-mail-function', which
2504 is `sendmail-query-once'. This offers to use the smtpmail package, or
2505 to use the old defaults relying on external mail facilities
2506 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2507 `mailclient-send-it' on Windows).
2509 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2510 transfers the report to your desktop's preferred mail client, if there
2511 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2514 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2515 and Mail mode changes
2517 ** Emacs server and client changes
2519 *** New option `server-port' specifies the port for TCP Emacs servers.
2521 *** New emacsclient argument -q/--quiet suppresses some status messages.
2523 *** New emacsclient argument --frame-parameters specifies the frame
2524 parameters of any newly-created graphical frame.
2526 *** If emacsclient shuts down due to Emacs signaling an error,
2527 its exit status is 1.
2529 *** New emacsclient argument --parent-id ID.
2530 This opens a client frame in parent X window ID, via XEmbed, similar
2531 to the --parent-id argument to Emacs.
2533 ** Internationalization changes
2535 *** Emacs now supports display and editing of bidirectional text.
2536 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2537 displayed in the correct visual order as expected by users of those
2538 scripts. The display reordering is a "full bidirectionality" class
2539 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2540 with no RTL text should look exactly the same as before.
2542 **** New buffer-local variable `bidi-display-reordering'.
2543 To disable display reordering in a buffer, change this to nil.
2545 **** New buffer-local variable `bidi-paragraph-direction'.
2546 If nil (the default), Emacs determines the base direction of each
2547 paragraph from its text, as specified by the UBA. Setting the value
2548 to `right-to-left' or `left-to-right' forces a base direction on each
2551 Paragraphs with right-to-left base direction are displayed starting at
2552 the right window edge.
2554 *** Enhanced support for characters with no glyphs in available fonts,
2555 or, on text terminals, characters that cannot be encoded by the
2556 terminal coding system. The new option `glyphless-char-display-control'
2557 specifies how to display them: as a hexadecimal code in a box, a thin
2558 1-pixel space, an empty box, etc.
2560 *** New input methods for Farsi and Bulgarian
2561 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2563 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2564 (U+2010 and U+2011).
2566 *** New Hebrew translation of the Emacs Tutorial.
2567 Type `C-u C-h t' to choose it in case your language setup doesn't
2568 automatically select it.
2570 ** An Emacs Lisp package manager is now included.
2571 This is a convenient way to download and install additional packages,
2572 from a package repository at http://elpa.gnu.org.
2574 *** M-x list-packages shows a list of packages, which can be
2575 selected for installation.
2577 *** New command `describe-package', bound to `C-h P'.
2579 *** By default, all installed packages are loaded automatically when
2580 Emacs starts up. To disable this, set `package-enable-at-startup' to
2581 nil. To specify the packages to load, customize `package-load-list'.
2583 ** Custom theme changes
2585 *** New command `M-x customize-themes', which provides a convenient
2586 interface for enabling and disabling Custom themes.
2588 *** New option `custom-theme-load-path' is the load path for themes.
2589 Emacs no longer looks for Custom themes in `load-path'. The default
2590 value of `custom-theme-load-path' says to look for themes in
2591 `custom-theme-directory', followed by a subdirectory of
2592 `data-directory' named "themes/", which contains a small selection of
2593 built-in Custom themes.
2595 *** New option `custom-safe-themes' records known-safe theme files.
2596 If a theme is not in this list, Emacs queries before loading it, and
2597 offers to save the theme to `custom-safe-themes' automatically. By
2598 default, all themes included in Emacs are treated as safe.
2600 ** Improved GTK integration
2602 *** GTK scroll-bars are now placed on the right by default.
2603 The function `set-scroll-bar-mode' can change this.
2605 *** GTK tool bars can have just text, just images or images and text.
2606 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2607 the default is taken from desktop settings.
2609 *** GTK tool bars can be placed on any edge of the frame.
2610 The frame-parameter tool-bar-position controls this. It takes the
2611 values top, left, right or bottom. The Options => Show/Hide menu has
2614 *** The default colors for selected text (the `region' face) are taken
2615 from the GTK theme when Emacs is built with GTK.
2617 *** Emacs uses GTK tooltips by default if built with GTK.
2618 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2620 ** Graphical interface changes
2622 *** On graphical displays, the mode-line no longer ends in dashes.
2623 Also, the first dash (which does not indicate anything) is just
2624 displayed as a space.
2626 *** `menu-bar-select-buffer-function' lets you choose another operation
2627 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2629 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2630 built with Xft. These fonts can be set via X resources, for example:
2631 Emacs.pane.menubar.font: Courier-12
2635 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2636 or if it receives a SIGINT signal in batch mode.
2638 *** `kill-emacs-hook' is now also run in batch mode.
2639 Third-party code which adds to `kill-emacs-hook' should check if they
2640 do the right thing in batch mode.
2642 ** Scrolling changes
2644 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2645 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2646 of buffer at first key-press (instead they move to top/bottom of buffer)
2647 when `scroll-error-top-bottom' is non-nil.
2649 *** New option `scroll-error-top-bottom' (see above).
2651 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2652 scroll a line instead of full screen.
2654 *** New property `scroll-command' should be set on a command's symbol to
2655 define it as a scroll command affected by `scroll-preserve-screen-position'.
2657 *** If you customize `scroll-conservatively' to a value greater than 100,
2658 Emacs will never recenter point in the window when it scrolls due to
2659 cursor motion commands or commands that move point (e.f., `M-g M-g').
2660 Previously, you needed to use `most-positive-fixnum' as the value of
2661 `scroll-conservatively' to achieve the same effect.
2663 *** "Aggressive" scrolling now honors the scroll margins.
2664 If you customize `scroll-up-aggressively' or
2665 `scroll-down-aggressively' and move point off the window, Emacs now
2666 scrolls the window so as to avoid positioning point inside the scroll
2669 ** Basic SELinux support has been added.
2670 This requires Emacs to be linked with libselinux at build time.
2672 *** Emacs preserves the SELinux file context when backing up.
2673 Also, the function `copy-file' has an extra optional argument for
2674 preserving SELinux context, and the return value of `backup-buffer'
2675 now includes the SELinux context.
2677 *** New functions `file-selinux-context' and `set-file-selinux-context'
2678 get and set the SELinux context of a file.
2682 *** `delete-by-moving-to-trash' now only affects commands that specify
2683 trashing. This avoids inadvertently trashing temporary files.
2685 *** Calling `delete-file' or `delete-directory' with a prefix argument
2686 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2688 ** File- and directory-local variable changes
2690 *** You can stop directory local vars from applying to subdirectories.
2691 Add an element (subdirs . nil) to the alist portion of any variables
2692 settings to indicate that the section should not apply to
2695 *** Directory local variables can apply to some file-less buffers.
2696 Affected modes include dired, vc-dir, and log-edit. For example,
2697 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2698 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2699 `hack-dir-local-variables-non-file-buffer' to support this.
2701 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2702 Instead, use "eval: (minor-mode 1)".
2704 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2705 to `inhibit-local-variables-regexps'. As the name suggests, it now
2706 applies to ALL file local variables, not just -*- lines. The
2707 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2712 *** The `quit-window' command now restores the last buffer displayed
2713 in the quitted window.
2715 *** Resizing an Emacs frame now preserves proportional window sizes,
2716 modulo restrictions like window minimum sizes and fixed-size windows.
2718 *** The behavior of `display-buffer' is now customizable in detail.
2720 **** New option `display-buffer-base-action' specifies a list of
2721 user-determined display "actions" (functions and optional arguments
2722 for choosing the displaying window).
2724 This takes precedence over the default display action, which is
2725 specified by `display-buffer-fallback-action'.
2727 **** New option `display-buffer-alist' maps buffer name regexps to
2728 display actions, taking precedence over `display-buffer-base-action'.
2730 *** New option `window-combination-limit'.
2731 The new option `window-combination-limit' allows to return the space
2732 obtained for resizing or creating a window more reliably to the window
2733 from which such space was obtained.
2735 *** New option `window-combination-resize'.
2736 The new option `window-combination-resize' allows to split a window that
2737 otherwise cannot be split because it's too small by stealing space from
2738 other windows in the same combination. Subsequent resizing or deletion
2739 of the window will resize all windows in the same combination as well.
2741 *** New option `frame-auto-hide-function' lets you choose between
2742 iconifying or deleting a frame when burying a buffer in a dedicated
2743 frame, or quitting a window showing a buffer in a frame of its own.
2745 *** New commands `maximize-window' and `minimize-window'.
2746 These maximize and minimize the size of a window within its frame.
2748 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2749 These functions allow to navigate through the live buffers that have
2750 been shown in a specific window.
2752 ** Minibuffer changes
2754 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2755 This is handy for minibuffer-only frames, and is also used for the feature
2756 where mouse-1 pops up *Messages*"', which can now easily be changed.
2758 *** Minibuffers set `truncate-lines' to nil.
2759 If you want to change the value to something else, you could use
2760 for example `minibuffer-setup-hook'.
2762 ** `auto-mode-case-fold' is now enabled by default.
2764 ** `backup-by-copying-when-mismatch' now defaults to t.
2766 ** New basic faces `error', `warning', `success'.
2767 These are used to highlight text indicating failure, caution or
2768 successful operation.
2770 ** New option `list-colors-sort' defines the color sort order
2771 for `list-colors-display'.
2773 ** The variable `focus-follows-mouse' now always defaults to nil.
2776 * Editing Changes in Emacs 24.1
2780 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2781 `isearch-yank-line'.
2783 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2784 `isearch-yank-kill'.
2786 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2788 ** New commands `count-words-region' and `count-words'.
2790 *** M-= is bound to `count-words-region', not `count-lines-region'.
2791 The `count-words-region' command, when called interactively, reports
2792 the number of lines, words, and characters in the region. It is a
2793 superset of the old `count-lines-region', which is now an obsolete
2796 ** The command `just-one-space' (M-SPC), if given a negative argument,
2797 also deletes newlines around point.
2801 *** New option `delete-active-region'.
2802 If non-nil, [delete] and DEL delete the region if it is active and no
2803 prefix argument is given. If set to `kill', those commands kill
2806 *** New command `delete-forward-char', bound to [delete].
2807 This is meant for interactive use, and obeys `delete-active-region'.
2808 The command `delete-char' does not obey `delete-active-region'.
2810 *** `delete-backward-char' is now a Lisp function.
2811 Apart from obeying `delete-active-region', its behavior is unchanged.
2812 However, the byte compiler now warns if it is called from Lisp; Lisp
2813 callers should use delete-char with a negative argument instead.
2815 *** The option `mouse-region-delete-keys' has been deleted.
2817 ** Selection changes.
2819 The default handling of clipboard and primary selections has been
2820 changed to conform with modern X applications. In short, most
2821 commands for killing and yanking text now use the clipboard, while
2822 mouse commands use the primary selection.
2824 In the following, we provide a list of these changes, followed by a
2825 list of steps to get the old behavior back if you prefer that.
2827 *** `select-active-regions' now defaults to t.
2828 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2829 the kill ring. The selected text is put in the primary selection, if
2830 the system possesses a separate primary selection facility (e.g. X).
2832 **** `select-active-regions' also accepts a new value, `only'.
2833 This means to only set the primary selection for temporarily active
2834 regions (usually made by mouse-dragging or shift-selection);
2835 "ordinary" active regions, such as those made with C-SPC followed by
2836 point motion, do not alter the primary selection.
2838 **** `mouse-drag-copy-region' now defaults to nil.
2840 *** mouse-2 is now bound to `mouse-yank-primary'.
2841 This pastes from the primary selection, ignoring the kill-ring.
2842 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2844 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2846 *** `x-select-enable-primary' now defaults to nil.
2847 Thus, commands that kill text or copy it to the kill-ring (such as
2848 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2850 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2851 exactly equivalent to M-w, C-w, and C-y respectively.
2853 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2854 non-nil by default, as Windows does not support the primary selection
2855 between applications.
2857 *** To return to the previous behavior, do the following:
2859 **** Change `select-active-regions' to nil.
2860 **** Change `mouse-drag-copy-region' to t.
2861 **** Change `x-select-enable-primary' to t (on X only).
2862 **** Change `x-select-enable-clipboard' to nil.
2863 **** Bind `mouse-yank-at-click' to mouse-2.
2865 *** Support for X cut buffers has been removed.
2867 *** X clipboard managers are now supported.
2868 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2870 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2871 in the current rectangle. With a prefix argument, this prompts for a
2872 number to count from and for a format string.
2874 ** `redisplay-dont-pause' now defaults to t.
2875 This makes Emacs feel more responsive to editing commands that arrive
2876 at high rate, e.g. if you lean on some key, because stopping redisplay
2877 in the middle (when this variable is nil) forces more expensive
2878 updates later on, and Emacs appears to be unable to keep up.
2880 ** The behavior of <TAB> for active regions in Text mode has changed.
2881 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2882 when the region is active causes Emacs to indent all the lines in the
2883 region, aligning them with the line previous to the first line in the
2884 region (or with the left margin if there is no previous line).
2886 ** When `occur' is called with a prefix argument, matching strings are
2887 collected into the `*Occur*' buffer without line numbers. If there
2888 are parenthesized subexpressions in the specified regexp, `occur'
2889 reads replacement text that may contain \\& and \\N whose convention
2890 follows `replace-match'.
2893 * Changes in Specialized Modes and Packages in Emacs 24.1
2895 ** Archive Mode has basic support for browsing and updating 7z archives.
2899 *** BibTeX mode now supports biblatex.
2900 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2901 `bibtex-entry-field-alist' is now an obsolete alias for
2902 `bibtex-BibTeX-entry-alist'.
2904 *** New command `bibtex-search-entries', bound to C-c C-a.
2906 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2908 *** New variable `bibtex-search-entry-globally'.
2912 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2914 *** The default browser used by the package is now the "xdg-open" program,
2915 on platforms that support it. This calls your desktop's preferred browser.
2919 *** Support for musical notes.
2921 *** Support for logarithmic units.
2923 *** No longer uses the tex prefix for TeX specific unit names when
2924 using TeX or LaTeX mode.
2926 *** New option to highlight selections using faces.
2928 *** `calc-histogram' has the option of using a vector to determine the bins.
2930 *** New "O" option prefix.
2932 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2934 ** Calendar, Diary, and Appt
2936 *** Diary entries can contain non-printing "comments".
2937 See the variable `diary-comment-start'.
2939 *** Appointments can specify their individual warning times.
2940 See the variable `appt-warning-time-regexp'.
2942 *** The function specified by `appt-disp-window-function' may be passed
2943 lists of arguments if multiple appointments are due at similar times.
2944 If you are using a custom function for this, you should update it.
2946 *** New function `diary-hebrew-birthday'.
2948 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2949 may no longer be nil, but must all be strings.
2951 *** The obsolete (since Emacs 22.1) method of enabling the appt
2952 package by adding `appt-make-list' to `diary-hook' has been removed.
2953 Use `appt-activate' instead.
2955 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2956 appt-issue-message (use the function appt-activate)
2957 appt-visible/appt-msg-window (use the variable appt-display-format)
2959 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2960 view-diary-entries, list-diary-entries, show-all-diary-entries
2964 *** New feature to "guess" the style in an existing buffer.
2965 The main entry point is M-x c-guess.
2967 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2969 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2970 Thus C-M-a will, by default, go to the beginning of the immediate function,
2973 *** "Macros with semicolons" can be registered for correct indentation.
2974 Where such a macro ends a line (no semicolon) the next statement is no longer
2975 parsed as a statement continuation.
2977 ** Comint and modes derived from it use the standard completion code.
2981 *** Compilation mode can be used without Font Lock mode.
2982 `compilation-parse-errors-function' is now obsolete.
2984 *** New variable `compilation-filter-start', which is bound while
2985 `compilation-filter-hook' runs. It records the start position of the
2986 text inserted by `compilation-filter'.
2988 *** `compilation-error-screen-columns' and `compilation-first-column'
2989 are obeyed in the editing buffer. So programming language modes can
2990 set them, whereas previously only the value in the *Compilation*
2995 *** Customize buffers now contain a search field.
2996 The search is performed using `customize-apropos'.
2997 To turn off the search field, set `custom-search-field' to nil.
2999 *** Options in customize group buffers start out hidden if not customized.
3000 Use the arrow to the left of the option name to toggle visibility.
3002 *** custom-buffer-sort-alphabetically now defaults to t.
3004 *** The color widget now has a "Choose" button, which allows you to
3005 choose a color via `list-colors-display'.
3009 *** It is now possible to access buses other than the default system
3012 *** The `dbus-register-method' and `dbus-register-property' functions
3013 optionally do not register names.
3015 *** The new function `dbus-register-service' registers a known service
3016 name on a D-Bus without also registering a property or a method.
3020 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3021 if called with a prefix argument, read a file name from the minibuffer
3022 instead of using the current buffer.
3024 *** The "dired local variables" feature of Dired-x is obsolete.
3025 The standard directory local variables feature replaces it.
3029 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3030 controlling attempts to autojoin a channel.
3032 *** New variable `erc-coding-system-precedence': If we use `undecided'
3033 as the server coding system, this variable will then be consulted.
3034 The default is to decode strings that can be decoded as utf-8 as
3035 utf-8, and do the normal `undecided' decoding for the rest.
3039 *** The default value of `eshell-directory-name' has changed
3040 to be an "eshell" directory in `user-emacs-directory'.
3041 The old "~/.eshell/" directory is still used if it exists, though.
3045 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3046 It now supports multithread non-stop debugging and simultaneous
3047 debugging of several threads.
3051 *** RET (`image-toggle-animation') toggles animation, if applicable.
3052 Animation plays once, unless the option `image-animate-loop' is non-nil.
3056 *** New command M-x info-display-manual displays a named Info manual.
3057 If that manual is already visited in some Info buffer, it displays
3058 that buffer. (This is handy if you have many manuals in many *info*
3059 buffers, and don't remember the name of the buffer visiting the manual
3060 you want to consult.) Otherwise, it loads and displays the manual.
3062 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3063 This is for compatibility with the stand-alone Info reader program,
3064 and also because `Info-edit' is a rarely used command that is disabled
3067 ** Mail mode changes (not Message mode)
3069 *** New command M-x mail-add-attachment for adding MIME attachments
3071 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3072 (Its name is misleading, since it has nothing to do with MIME
3073 attachments.) The old name is now an obsolete alias to the new name.
3075 ** MH-E has been updated to MH-E version 8.3.1.
3076 See MH-E-NEWS for details.
3078 ** Modula-2 mode provides auto-indentation.
3080 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3082 ** nXML mode no longer binds C-RET to `nxml-complete'.
3083 Completion is now performed via `completion-at-point', bound to C-M-i
3084 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3085 default), this performs tag completion.
3087 ** Org mode has been updated to version 7.8.09.
3088 See ORG-NEWS for details.
3090 ** Prolog mode has been completely revamped, with lots of additional
3091 functionality such as more intelligent indentation, electricity,
3092 support for more variants, including Mercury, and a lot more.
3096 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3097 in the Rmail incoming message.
3099 *** The variable `rmail-message-filter' no longer has any effect.
3100 This change was made in Emacs 23.1 but was not advertised at the time.
3101 Try using `rmail-show-message-hook' instead.
3105 *** M-x shell prompts for the shell path name if the default directory
3106 is a remote file name and neither the environment variable $ESHELL nor
3107 the variable `explicit-shell-file-name' is set.
3109 *** TAB is now bound to the standard `completion-at-point' command,
3110 which now implements the pcomplete rules for shell command completion.
3114 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3115 if the mail server supports them. This uses either built-in GnuTLS
3116 support, or the starttls.el library. Customize `smtpmail-stream-type'
3119 *** The variable `smtpmail-auth-credentials' has been removed.
3120 By default, the information is now stored in the file ~/.authinfo.
3121 This was the default value of smtpmail-auth-credentials. If you had
3122 customized smtpmail-auth-credentials to a list of user names and
3123 passwords, those settings are not used. During your first connection
3124 to the smtp server, Emacs will prompt for the user name and password,
3125 and offer to save them to ~/.authinfo. Or you can manually copy the
3126 credentials to ~/.authinfo. For example, if you had
3128 (setq smtpmail-auth-credentials
3129 '(("mail.example.org" 25 "jim" "s!cret")))
3131 then the equivalent line in ~/.authinfo would be
3133 machine mail.example.org port 25 login jim password s!cret
3135 See the auth-source manual for more information, e.g. on encrypting
3136 the credentials file.
3138 *** The variable `smtpmail-starttls-credentials' has been removed.
3139 If you had that set, you need to put
3141 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3143 in your ~/.authinfo file instead.
3145 *** SMTPmail defaults to using the address in the From: header as the
3146 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3147 to the address you wish to use instead.
3151 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3152 and `sql-oracle-scan-on'.
3154 *** New options controlling prompting for login parameters.
3155 Each supported product has a custom variable `sql-*-login-params',
3156 which is a list of the parameters to be prompted for before a
3157 connection is established.
3159 *** The command `sql-product-interactive' now takes a prefix argument,
3160 which causes it to prompt for an SQL product.
3162 *** Product-specific SQL interactive commands now take prefix arguments.
3163 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3164 given a prefix argument, prompt for a name for the SQL interactive
3165 buffer. This reduces the need for calling `sql-rename-buffer'.
3167 *** SQL interactive modes suppress command continuation prompts, and
3168 replace tabs with spaces. The first change impacts multiple line SQL
3169 statements entered with C-j between each line, statements yanked into
3170 the buffer and statements sent with `sql-send-*' functions. The
3171 second prevents the MySQL and Postgres interpreters from listing
3172 object name completions when sent text via `sql-send-*' functions.
3174 *** New command `sql-connect' starts a predefined SQLi session,
3175 using the login parameters from `sql-connection-alist'.
3177 *** New "Save Connection" menu item in SQLi buffers.
3178 This gathers the login params specified for the SQLi session, if it
3179 was not started by a connection, and saves them as a new connection.
3181 *** New commands for listing database objects and details:
3182 sql-list-all and sql-list-table.
3184 *** An API for manipulating SQL product definitions has been added.
3188 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3192 *** New inline access method "ksu" (kerberized su).
3194 *** The following access methods are discontinued: "ssh1_old",
3195 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3197 *** The user option `remote-file-name-inhibit-cache' controls whether
3198 remote file attributes are cached for better performance.
3200 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3201 default value to "".
3203 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3204 for remote machines which support SELinux.
3206 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3207 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3208 the degree of parallelism.
3210 ** VC and related modes
3212 *** Support for pulling on distributed version control systems.
3213 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3214 supported (currently with Bzr, Git, and Mercurial), to update the
3215 current branch and working tree. A prefix argument means to prompt
3216 the user for specifics, e.g. a pull location.
3218 *** `vc-update' is now an alias for `vc-pull'.
3220 *** Support for merging on distributed version control systems.
3221 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3222 is supported (currently with Bzr, Git, and Mercurial), to merge
3223 changes from another branch into the current one. It prompts for
3224 specifics, e.g. a merge source.
3226 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3227 shows a diff while querying the user. It defaults to t.
3229 *** Log entries in some Log View buffers can be toggled to display a
3230 longer description by typing RET (log-view-toggle-entry-display).
3231 This is currently supported for Bzr, Git, and Mercurial (to support
3232 another backend, define a `log-view-expanded-log-entry-function').
3233 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3234 use this to display the full log entry for the revision at point.
3236 *** New command `vc-ediff' allows visual comparison of two revisions
3237 of a file similar to `vc-diff', but using ediff backend.
3239 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3240 this was not advertised at the time.
3242 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3243 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3244 this was not advertised at the time.
3250 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3252 *** partial-completion-mode (complete.el) is obsolete.
3253 You can get a comparable behavior with:
3254 (setq completion-styles '(partial-completion initials))
3255 (setq completion-pcm-complete-word-inserts-delimiters t)
3257 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3259 *** pgg is obsolete (use EasyPG instead).
3261 *** sregex.el is obsolete, since rx.el is a strict superset.
3263 *** s-region.el and pc-select.el are obsolete.
3264 They are superseded by shift-select-mode, enabled by default since 23.1.
3266 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3270 *** The Landmark game is now invoked with `landmark', not `lm'.
3271 Its functions and variables have been similarly renamed.
3273 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3274 (This interfered with cua-mode.)
3276 *** f90.el has some support for Fortran 2008 syntax.
3278 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3280 *** New command `nato-region' converts text to NATO phonetic alphabet.
3283 * New Modes and Packages in Emacs 24.1
3285 ** Occur Edit mode applies edits made in *Occur* buffers to the
3286 original buffers. It is bound to "e" in Occur mode.
3288 ** New global minor mode electric-pair-mode.
3289 When enabled, typing an open parenthesis automatically inserts the
3290 matching closing one.
3292 ** New global minor mode electric-indent-mode.
3293 When enabled, typing certain characters triggers reindentation.
3294 Major modes wishing to use this can set electric-indent-chars or
3295 electric-indent-functions.
3297 ** New global minor mode electric-layout-mode.
3298 When enabled, typing certain characters automatically inserts newlines.
3299 Major modes wishing to use this can set electric-layout-rules.
3301 ** tabulated-list.el provides a generic major mode for tabulated data,
3302 from which other modes can be derived.
3304 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3306 ** secrets.el is an implementation of the Secret Service API, an
3307 interface to password managers like GNOME Keyring or KDE Wallet. The
3308 Secret Service API requires D-Bus for communication. The command
3309 `secrets-show-secrets' offers a buffer with a visualization of the
3312 ** notifications.el provides an implementation of the Desktop
3313 Notifications API. It requires D-Bus for communication.
3315 ** soap-client.el supports access to SOAP web services from Emacs.
3316 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3318 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3320 ** New emacs-lock.el package.
3321 The previous version has been moved to obsolete/old-emacs-lock.el.
3322 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3323 against exiting Emacs and killing the buffer can be set separately.
3324 The mechanism for automatically turning off protection for buffers
3325 with dead inferior processes has been generalized.
3328 * Incompatible Lisp Changes in Emacs 24.1
3330 ** Passing a nil argument to a minor mode function call now ENABLES
3331 the minor mode unconditionally. This is so that you can write e.g.
3333 (add-hook 'text-mode-hook 'foo-mode)
3335 to enable foo-mode in Text mode buffers, removing the need for
3336 `turn-on-foo-mode' style functions. This affects all mode commands
3337 defined by `define-minor-mode'. If called interactively, the mode
3338 command still toggles the minor mode.
3340 ** The return value of `backup-buffer' has changed.
3341 It is now a list of three elements, where the second element is a list
3342 describing the original file's SELinux context. If Emacs or the
3343 system lacks SELinux support, the context list is (nil nil nil nil).
3344 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3346 ** `char-direction-table' and the `char-direction' function were deleted.
3347 They were buggy and inferior to the new support of bidirectional
3348 editing introduced in Emacs 24. If you need the bidirectional
3349 properties of a character, use `get-char-code-property' with the last
3350 argument `bidi-class'.
3352 ** `copy-directory' now copies the source directory as a subdirectory
3353 of the target directory, if the latter is an existing directory. The
3354 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3355 the contents directly into a pre-existing target directory.
3357 ** For mouse click input events in the text area, the Y pixel
3358 coordinate in the POSITION list now counts from the top of the text
3359 area, excluding any header line. Previously, it counted from the top
3362 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3363 been further reduced. Now a backquote not followed by a space is
3364 always treated as a "new-style" backquote. Please remove all
3365 "old-style" backquotes from your code. If your code uses backquotes
3366 as documented in the Elisp manual, and compiles without warning, then
3367 you have nothing to do in this regard. Code not following the
3368 appropriate conventions may fail to compile.
3370 The most common cause of trouble seems to be an old-style backquote
3371 followed by a newline. Another cause of trouble is vector notation
3372 for key sequence notation: instead of [(control ,)] and [(control ')],
3373 you should write [(control ?,)] and [(control ?')], which will work in
3376 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3377 was not advertised at the time. The function `custom-initialize-delay'
3378 replaced all known uses.
3380 ** `view-buffer' now treats special mode-class in the same way that
3381 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3382 major mode is special).
3384 ** Menu and tool bar changes
3386 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3387 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3388 With these alist entries omitted, `make-frame' checks the value of the
3389 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3390 a menu-bar or tool-bar, respectively. If the alist entries are added,
3391 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3393 *** The menu bar bindings's caches are not used any more.
3394 Use (where-is-internal <def> nil t) instead.
3396 ** Regions created by mouse dragging are now normal active regions,
3397 similar to those created by shift-selection (see Selection changes
3398 above). In previous Emacs versions, these regions were delineated by
3399 `mouse-drag-overlay'; that variable has been removed.
3401 ** The fourth argument of `filter-buffer-substring' has been removed.
3402 If you want to remove text properties from the final result, simply
3403 pass the result through substring-no-properties.
3405 ** cl.el no longer provides `cl-19'.
3407 ** The following obsolete functions and aliases have been removed
3408 (the appropriate new function is given in parentheses; "not needed"
3409 means you can just remove all calls to the function in question):
3411 *** `comint-kill-output' (`comint-delete-output')
3412 *** `decompose-composite-char' (`char-to-string')
3413 *** `outline-visible' (`outline-invisible-p')
3414 *** `internal-find-face' (`facep')
3415 *** `internal-get-face' (`facep and check-face')
3416 *** `frame-update-faces' (not needed)
3417 *** `frame-update-face-colors' (`frame-set-background-mode')
3418 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3419 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3420 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3421 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3422 *** `x-make-font-unbold' (`make-face-unbold')
3423 *** `x-make-font-unitalic' (`make-face-unitalic')
3424 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3425 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3426 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3427 *** `char-bytes' (== 1)
3428 *** `isearch-return-char' (`isearch-printing-char')
3429 *** `make-local-hook' (not needed)
3430 *** `set-screen-height' (`set-frame-height')
3431 *** `set-screen-width' (`set-frame-width')
3433 ** The following obsolete variables and varaliases have been removed
3434 (the appropriate new variable is given in parentheses):
3436 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3437 *** `vc-header-alist' (`vc-BACKEND-header')
3438 *** `directory-sep-char' (== ?/)
3439 *** `font-lock-defaults-alist' (`font-lock-defaults')
3440 *** `e' (`float-e').
3442 ** The following obsolete files were removed:
3443 sc.el, x-menu.el, rnews.el, rnewspost.el
3445 ** The format of the finder-inf.el file has changed, since the Finder
3446 mechanism is now based on the package system. The variable
3447 `finder-package-info' is replaced by `package--builtins' and
3448 `finder-keywords-hash'.
3450 ** When generating autoloads, `update-directory-autoloads' no longer
3451 assumes every inspected file is in your `load-path'. It instead
3452 generates relative names according to the current `load-path'.
3455 * Lisp Changes in Emacs 24.1
3457 ** Code can now use lexical scoping by default instead of dynamic scoping.
3458 The `lexical-binding' variable enables lexical scoping for local
3459 variables. It is typically set via a file-local variable in the first
3460 line of the file, in which case it applies to all the code in that
3463 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3464 binding instead of the old dynamic binding mode.
3466 *** Lexically scoped interpreted functions are represented with a new form
3467 of function value which looks like (closure ENV ARGS &rest BODY).
3469 *** New macro `letrec' to define recursive local functions.
3471 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3472 So do `defcustom' and other forms that call `defvar' as a subroutine.
3474 *** New function `special-variable-p' to check whether a variable is
3475 declared as dynamically bound.
3477 *** The form ((lambda ...) ...) is deprecated.
3479 ** An Emacs Lisp testing tool is now included.
3480 Emacs Lisp developers can use this tool to write automated tests for
3481 their code. See the ERT info manual for details.
3483 ** Changes for bidirectional display and editing
3485 *** New function `current-bidi-paragraph-direction'.
3486 This returns the base direction of the paragraph at point.
3488 *** New function `bidi-string-mark-left-to-right'.
3489 Given a string containing characters from right-to-left scripts, this
3490 function returns another string which can be safely inserted into a
3491 buffer, such that any following text will be always displayed to the
3492 right of that string. (This works by appending an invisible Unicode
3493 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3495 This is useful when the buffer has overall left-to-right paragraph
3496 direction and you need to insert a string whose contents are not known
3497 in advance, without disrupting the layout of the line.
3501 *** Window tree functions are accessible in Elisp.
3502 Functions are provided to return the parent, siblings or child windows
3503 of any window including internal windows (windows not associated with a
3504 buffer) in the window tree.
3506 **** New function `window-valid-p' gives non-nil for live and internal
3509 **** Window manipulation can deal with internal windows.
3510 Many window handling functions like `split-window', `delete-window', or
3511 `delete-other-windows' as well as the window resizing functions can now
3512 act on any window including internal ones.
3514 *** window-total-height/-width vs window-body-height/-width.
3515 The function `window-height' has been renamed to `window-total-height'
3516 and `window-width' has been renamed to `window-body-width'. The old
3517 names are provided as aliases. Two new functions `window-total-width'
3518 and `window-body-height' are provided.
3520 *** Window parameters specific to window handling functions.
3521 For each window you can specify a parameter to override the default
3522 behavior of a number of functions like `split-window', `delete-window'
3523 and `delete-other-windows'. The variable `ignore-window-parameters'
3524 allows to ignore processing such parameters.
3526 *** New semantics of third argument of `split-window'.
3527 The third argument of `split-window' has been renamed to SIDE and can be
3528 set to any of the values 'below, 'right, 'above, or 'left to make the
3529 new window appear on the corresponding side of the window that shall be
3530 split. Any other value of SIDE will cause `split-window' to split the
3531 window into two side-by-side windows as before.
3533 *** Window resizing functions.
3534 A new standard function for resizing windows called `window-resize' has
3535 been introduced. This and all other functions for resizing windows no
3536 longer delete any windows when they become too small.
3538 *** Deleting the selected window now selects the most recently selected
3539 live window on that frame instead.
3541 *** `adjust-window-trailing-edge' adjustments.
3542 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3543 is able to resize other windows if a window adjacent to the trailing
3544 edge cannot be shrunk any more. This makes its behavior more similar to
3545 that of Emacs 21 without compromising, however, its inability to delete
3546 windows which was introduced in Emacs 22.
3548 *** Window-local buffer lists.
3549 Windows now have local buffer lists. This means that removing a buffer
3550 from display in a window will preferably show the buffer previously
3551 shown in that window with its previous window-start and window-point
3552 positions. This also means that the same buffer may be automatically
3553 shown twice even if it already appears in another window.
3555 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3556 which if non-nil requires the buffer to be displayed in the currently
3557 selected window, signaling an error otherwise. If nil, another window
3558 can be used, e.g. if the selected one is strongly dedicated.
3560 *** `split-window-vertically' and `split-window-horizontally' renamed
3561 to `split-window-below' and `split-window-right' respectively.
3562 The old names are kept as aliases.
3566 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3567 named ACTION, and takes a display action of the same form as
3568 `display-buffer-base-action' (see Changes, above). A non-nil,
3569 non-list value is treated specially, as the old meaning.
3571 **** New variable `display-buffer-overriding-action'.
3573 **** The procedure of `display-buffer' etc. to choose a window is
3574 determined by combining `display-buffer-overriding-action',
3575 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3576 and `display-buffer-fallback-action'. The second and fourth of these
3577 are user-customizable variables.
3579 See the docstring of `display-buffer' for details.
3581 *** New functions `window-state-get' and `window-state-put'.
3582 These functions allow to save and restore the state of an arbitrary
3583 frame or window as an Elisp object.
3587 *** New variable `completion-extra-properties' used to specify extra
3588 properties of the current completion:
3589 - :annotate-function, same as the old completion-annotate-function.
3590 - :exit-function, function to call after completion took place.
3592 *** Functions on `completion-at-point-functions' can return any of the
3593 properties valid for `completion-extra-properties'.
3595 *** `completion-annotate-function' is obsolete.
3597 *** New `metadata' method for completion tables. The metadata thus returned
3598 can specify various details of the data returned by `all-completions':
3599 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3600 used to select a style in completion-category-overrides.
3601 - `annotation-function' to add annotations in *Completions*.
3602 - `display-sort-function' to specify how to sort entries in *Completions*.
3603 - `cycle-sort-function' to specify how to sort entries when cycling.
3605 *** `minibuffer-local-filename-must-match-map' is not used any more.
3606 Instead, the bindings in `minibuffer-local-filename-completion-map'
3607 are combined with `minibuffer-local-must-match-map'.
3609 *** New variable `completing-read-function' allows overriding the
3610 behavior of `completing-read'.
3612 ** `glyphless-char-display' can now distinguish between graphical and
3613 text terminal display, via a char-table entry that is a cons cell.
3615 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3616 Instead, the offending function is removed.
3620 *** New function `run-hook-wrapped' for running an abnormal hook by
3621 passing the hook functions as arguments to a "wrapping" function.
3622 Like `run-hook-with-args-until-success', it stops at the first
3623 non-nil return value.
3625 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3626 set of "wrapping" filters, similar to around advice.
3627 (A version of this macro was actually added in Emacs 23.2 but was not
3628 advertised at the time.)
3632 *** New macro `condition-case-unless-debug' (this was actually added in
3633 Emacs 23.1 as condition-case-no-debug, but not advertised)
3635 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3637 *** Variable `stack-trace-on-error' removed.
3639 *** The debugger can now "continue" from an error, which means it will
3640 jump to the error handler as if the debugger had not been invoked
3641 instead of jumping all the way to the top-level.
3643 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3644 This can be useful when `inhibit-quit' is set.
3646 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3647 named Emacs server instances.
3649 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3650 to redirect STDOUT to a file.
3652 ** The function `format-time-string' now supports the %N directive,
3653 for higher-resolution time stamps.
3655 ** New input reading functions
3657 *** New function `read-char-choice' reads a restricted set of
3658 characters, discarding any inputs not inside the set.
3660 *** The command `read-color' now requires a match for a color name
3661 or RGB triplet, instead of signaling an error if the user provides
3664 **** `facemenu-read-color' is now an alias for `read-color'.
3666 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3667 The variable is now used to load all kind of supported dynamic libraries,
3668 not just image libraries. The previous name is still available as an
3671 ** Syntax parsing changes
3673 *** New variable `syntax-propertize-function'.
3674 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3675 This allows syntax-table properties to be set independently from font-lock:
3676 just call syntax-propertize to make sure the text is propertized.
3677 Together with this new variable come a new hook
3678 syntax-propertize-extend-region-functions, as well as two helper functions:
3679 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3680 as-is; and syntax-propertize-rules which provides a new way to specify
3683 *** Syntax tables support a new "comment style c" additionally to style b.
3685 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3687 ** frame-local variables cannot be let-bound any more.
3689 ** Major and minor mode changes
3691 *** `set-auto-mode' now respects mode: local variables at the end of files,
3692 as well as those in the -*- line.
3694 *** `prog-mode' is a new major mode from which programming modes
3697 **** `prog-mode-hook' can be used to enable features for programming
3698 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3699 on-the-fly spell checking for comments and strings.
3701 *** New hook `change-major-mode-after-body-hook', run by
3702 `run-mode-hooks' just before any other mode hooks.
3704 *** Enabled globalized minor modes can be disabled in specific major modes.
3705 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3706 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3708 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3710 ** File-handling changes
3712 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3713 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3714 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3715 argument is supplied (see Trash changes, above).
3717 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3719 ** Tool-bars can display separators.
3720 Tool-bar separators are handled like menu separators in menu-bar maps,
3721 i.e. via menu entries of the form `(menu-item "--")'.
3725 *** Animated images support (currently animated gifs only).
3727 **** `image-animated-p' returns non-nil if an image can be animated.
3729 **** `image-animate' animates a supplied image spec.
3731 **** `image-animate-timer' returns the timer object for an image that
3734 *** `image-extension-data' has been renamed to `image-metadata'.
3735 The old name is an obsolete alias to the new one.
3737 *** Image mode can view any image type that ImageMagick supports.
3738 This requires Emacs to be built with ImageMagick support.
3740 **** New function `imagemagick-types', defined if ImageMagick support
3741 is enabled, returns a list of image file extensions that your
3742 ImageMagick installation supports.
3744 **** New function `imagemagick-register-types' enables ImageMagick
3745 image types in Image mode and in `create-image' and other helper
3748 **** New option `imagemagick-types-inhibit' excludes certain
3749 ImageMagick image types from `imagemagick-register-types'.
3751 **** With ImageMagick support, there are extra Image mode commands to
3752 resize and rotate images: `image-transform-fit-to-height',
3753 `image-transform-fit-to-width', `image-transform-set-rotation', and
3754 `image-transform-set-scale'.
3756 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3757 passes it to the mail user agent function. This argument specifies an
3758 action for returning to the caller after finishing with the mail. For
3759 example, this is used by Rmail to optionally delete a mail window.
3761 ** XML and HTML parsing
3762 If Emacs is compiled with libxml2 support, there are two new
3763 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3764 and `libxml-parse-xml-region' (which parses XML). Both return an
3765 Emacs Lisp parse tree.
3767 ** Networking and encryption changes
3769 *** `open-network-stream' can now be used to open an encrypted stream.
3770 It now accepts an optional `:type' parameter for initiating a TLS
3771 connection, directly or via STARTTLS. To do STARTTLS, additional
3772 parameters (`:end-of-command', `:success', `:capabilities-command')
3773 must also be supplied.
3775 *** New library gnutls.el.
3776 The new function `gnutls-available-p' returns non-nil if Emacs is
3777 built with GnuTLS support. The main entry points are
3778 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3779 these functions through `open-network-stream', because that can
3780 upgrade connections through STARTTLS opportunistically or use plain
3781 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3784 *** New primitive `secure-hash' that supports many secure hash algorithms:
3785 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3786 sha1.el has been removed. The `sha1' feature is provided by default.
3790 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3792 ** Progress reporters can now "spin".
3793 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3794 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3795 time you call `progress-reporter-update' on that progress reporter,
3796 with a nil or omitted VALUE argument, the reporter message is
3797 displayed with a "spinning bar".
3799 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3800 being reverted, even if the buffer has a local `revert-buffer-function'.
3802 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3803 If delayed-warnings-list is non-nil, the command loop calls
3804 `delayed-warnings-hook' after `post-command-hook'. At present, this
3805 is only used by Emacs on some platforms to display warnings during
3806 startup, which might otherwise not be noticed. This uses the
3807 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3809 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3811 ** New function `make-composed-keymap' that constructs a new keymap
3812 from multiple input maps. You can use this to make a keymap that
3813 inherits from multiple maps, eg:
3814 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3816 ** New function `string-prefix-p'.
3817 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3819 ** New reader macro ## that stands for the empty symbol.
3820 This means that the empty symbol can now be read back. Also, #: by itself
3821 (when not immediately followed by a possible symbol character) stands for
3822 an empty uninterned symbol.
3824 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3826 ** The following functions and variables are obsolete:
3828 *** `tooltip-use-echo-area' is obsolete.
3829 Rather than setting this to t, disable Tooltip mode instead.
3831 *** buffer-substring-filters is obsolete.
3832 Use `filter-buffer-substring-functions' instead.
3834 *** `byte-compile-disable-print-circle' is obsolete.
3836 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3837 Use `post-command-hook' instead.
3839 *** `font-lock-maximum-size' is obsolete.
3842 * Changes in Emacs 24.1 on Non-Free Operating Systems
3844 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3845 and also when HOME is set to C:\ by default.
3847 ** New configure.bat options
3849 *** --enable-checking builds Emacs with extra runtime checks.
3851 *** --distfiles specifies files to be included in binary distribution.
3853 *** --without-gnutls disables automatic GnuTLS detection.
3855 *** --lib for general library linkage, works with the USER_LIBS build variable.
3857 ** New make target `dist' to create binary distribution for MS Windows.
3859 ** The Lisp function `w32-default-color-map' is now obsolete.
3860 (It is only used internally in the Emacs C code.)
3862 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3863 reappear on mouse-over. (Requires OS X 10.6 or later.)
3865 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3866 other platforms, rather than inserting its contents into the buffer.
3869 ----------------------------------------------------------------------
3870 This file is part of GNU Emacs.
3872 GNU Emacs is free software: you can redistribute it and/or modify
3873 it under the terms of the GNU General Public License as published by
3874 the Free Software Foundation, either version 3 of the License, or
3875 (at your option) any later version.
3877 GNU Emacs is distributed in the hope that it will be useful,
3878 but WITHOUT ANY WARRANTY; without even the implied warranty of
3879 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3880 GNU General Public License for more details.
3882 You should have received a copy of the GNU General Public License
3883 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3888 paragraph-separate: "[
\f]*$"