1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
32 ** Emacs can now be compiled with file notification support.
33 This happens by default if a suitable system library is found at
34 build time. To prevent this, use the configure option
35 `--without-file-notification'. See below for file-notify features.
36 FIXME? This feature is not available for the Nextstep port. (?)
39 ** The configure option `--without-compress-info' has been generalized,
40 and renamed to `--without-compress-install'. It now prevents compression
41 of _any_ files during installation.
44 ** The configure option `--with-crt-dir' has been removed.
45 It is no longer needed, as the crt*.o files are no longer linked specially.
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as if they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
162 *** The command `describe-function' has been extended for EIEIO.
163 Running it on constructors will show a full description of the
164 generated class. For generic functions, it will show all
165 implementations together with links to the source. The old commands
166 `describe-class', `describe-constructor' and `describe-generic' were
170 *** The function `quail-help' is no longer an interactive command.
171 Use `C-h C-\' (`describe-input-method') instead.
176 *** ImageMagick images now support the :max-width and :max-height keywords.
179 *** When using `create-image' with image data, you can pass a :format
180 attribute (via the property-list argument) in order to help
181 ImageMagick detect the image type. The value should be a MIME
182 content-type that is found in the new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
190 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
191 `frame-configuration-to-register'. It offers similar functionality,
192 plus enhancements like the ability to restore deleted frames. The
193 command `frame-configuration-to-register' still exists, but is unbound.
196 *** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 *** Emacs can now draw dividers between adjacent windows.
201 To put dividers between side-by-side/vertically stacked windows
202 customize the frame parameter `right-divider-width'/`bottom-divider-width'
203 to some positive integer. You can drag dividers with the mouse
204 (they show a corresponding cursor when the mouse hovers over them).
205 You can change the appearance of dividers by customizing the faces
206 `window-divider', `window-divider-first-pixel', and
207 `window-divider-last-pixel'. The last two are useful to provide a 3D
208 effect, or to better distinguish dividers from surrounding display objects.
211 *** `split-window' is now a non-interactive function, not a command.
212 As a command, it was a special case of `C-x 2' (`split-window-below'),
213 and as such superfluous. After being reimplemented in Lisp, its
214 interactive form was mistakenly retained.
217 *** New option `scroll-bar-adjust-thumb-portion'.
218 Available only on X, this option allows to control over-scrolling
219 using the scroll bar (i.e. dragging the thumb down even when the end
220 of the buffer is visible).
222 ** Lisp evaluation changes
224 *** `eval-defun' on an already defined defcustom calls the :set function,
228 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
229 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
230 zero prefix argument. This disables truncation of lists in the output,
231 equivalent to setting `(eval-expression-)print-length' and
232 `(eval-expression-)print-level' to nil. Additionally, it causes integers
233 to be printed in other formats (octal, hexadecimal, and character).
236 *** New hook `eval-expression-minibuffer-setup-hook' run by
237 `eval-expression' on entering the minibuffer.
240 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
243 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
244 because it affects caching of paragraph scanning results as well.
245 There is no reason to set this to nil except for debugging purposes.
248 ** The option `set-mark-default-inactive' has been deleted.
249 This unfinished feature was introduced by accident in Emacs 23.1;
250 simply disabling Transient Mark mode does the same thing.
252 ** The default value of `comment-use-global-state' is now t,
253 and this variable has been marked obsolete.
256 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
257 and works for git too, if you fetch the repository notes.
259 ** `read-regexp-defaults-function' defines a function to provide default
260 values for reading regexps by commands like `rgrep', `lgrep' `occur',
261 `highlight-regexp', etc. You can customize this to specify a function
262 that provides a default value from the regexp last history element,
263 or from the symbol found at point.
266 ** New option `load-prefer-newer' affects how the `load' function chooses
267 the file to load. If this is non-nil, then when both .el and .elc
268 versions of a file exist, and the caller did not explicitly specify
269 which one to load, then the newer file is loaded. The default, nil,
270 means to always load the .elc file.
273 * Editing Changes in Emacs 24.4
275 ** Indentation changes
278 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
279 When invoked without a prefix argument, it now activates a transient
280 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
281 the text indentation in the region. Typing any other key resumes
282 normal editing behavior.
284 *** `electric-indent-mode' is enabled by default.
287 *** `tab-stop-list' is now implicitly extended to infinity by repeating
288 the last step. Its default value is changed to nil, which means a tab
289 stop every `tab-width' columns.
292 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
293 When called in succession, it cycles between spacing conventions:
294 one space, no spaces, original spacing.
297 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
298 a line after a one-letter word, which is an error in some typographical
299 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
302 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
304 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
305 Most commands are still unaware of it, but kill/yank do work on the rectangle.
308 ** New option `visual-order-cursor-movement'.
309 If this is non-nil, cursor motion with arrow keys will follow the
310 visual order of characters on the screen: <left> always moves to the
311 left, <right> always moves to the right, disregarding the surrounding
312 bidirectional context.
317 *** All interactive commands that read a register (`copy-to-register', etc.)
318 now display a temporary window after `register-preview-delay' seconds
319 that summarizes existing registers. To disable this, set that option to nil.
320 Interactive commands that read registers and want to make use of this
321 should use `register-read-with-preview' to read register names.
324 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
327 *** New command `C-x r f' (`frameset-to-register').
328 See Changes in Emacs 24.4, above.
331 ** New command `delete-duplicate-lines'.
332 This searches the region for identical lines, and removes all but one
333 copy of each repeated line. The lines need not be sorted.
336 * Changes in Specialized Modes and Packages in Emacs 24.4
339 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
341 ~/.emacs.d/timelog replaces ~/.timelog
342 ~/.emacs.d/vip replaces ~/.vip
343 ~/.emacs.d/viper replaces ~/.viper
344 ~/.emacs.d/ido.last replaces ~/.ido.last
345 ~/.emacs.d/kkcrc replaces ~/.kkcrc
346 ~/.emacs.d/quickurls replaces ~/.quickurls
347 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
348 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
349 ~/.emacs.d/places replaces ~/.emacs-places
350 ~/.emacs.d/shadows replaces ~/.shadows
351 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
352 ~/.emacs.d/strokes replaces ~/.strokes
353 ~/.emacs.d/notes replaces ~/.notes
354 ~/.emacs.d/type-break replaces ~/.type-break
355 Also the following files used by the now obsolete otodo-mode.el:
356 ~/.emacs.d/todo-do replaces ~/.todo-do
357 ~/.emacs.d/todo-done replaces ~/.todo-done
358 ~/.emacs.d/todo-top replaces ~/.todo-top
360 ** Backtrace and debugger
362 *** The Lisp debugger's `e' command now includes the lexical environment
363 when evaluating the code in the context at point. Hence, it now lets
364 you access lexical variables.
367 *** New command `v' (`debugger-toggle-locals') displays local vars.
369 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
370 code run via JIT Lock.
373 ** Battery information can now be retrieved from BSD's `apm' utility.
376 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
378 ** Calendar and Diary
381 *** New faces `calendar-weekday-header', `calendar-weekend-header',
382 and `calendar-month-header'.
385 *** New option `calendar-day-header-array'.
388 *** New variable `diary-from-outlook-function', used by the command
389 `diary-from-outlook'.
392 *** The variable `calendar-font-lock-keywords' is obsolete.
397 *** Calc by default now uses the Gregorian calendar for all dates, and
398 uses January 1, 1 AD as its day number 1. Previously Calc used the
399 Julian calendar for dates before September 14, 1752, and it used
400 December 31, 1 BC as its day number 1; the new scheme is more
401 consistent with Calendar's calendrical system and day numbering.
404 *** The new option `calc-gregorian-switch' lets you configure if
405 (and when) Calc switches from the Julian to the Gregorian calendar.
408 *** Support for ISO 8601 dates.
414 **** The cpp-root project now supports executing a compile command.
415 It can be set through the new :compile-command slot or the
416 buffer-local variable `compile-command'.
418 **** Better selection of include directories for the 'linux' project.
419 Include directories now support out-of-tree build directories and
420 target architecture auto-detection.
424 **** Improved detection of used namespaces in current scope in C++.
426 **** Parsing of default values for variables and function arguments in C/C++.
427 They are also displayed by the summarize feature in the mode line.
429 **** Improved parsing of function pointers in C/C++.
430 This also includes parsing of function pointers as function arguments.
432 **** Parsing of C/C++ preprocessor macros that open new scope.
433 For example, this enables parsing of macros that open new namespaces.
435 **** Support for 'this' pointer in inline member functions in C++.
440 *** New macro `cl-tagbody'.
441 This executes statements while allowing for control transfer to labels.
444 *** letf is now just an alias for cl-letf.
448 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
449 Hence, you can now enable it independently from those modes, and from
450 `transient-mark-mode'.
453 *** `cua-highlight-region-shift-only' is now obsolete.
454 You can disable `transient-mark-mode' to get the same result.
456 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
461 *** Support for completion, ElDoc, and Flycheck has been added.
464 *** The current CFEngine syntax is parsed from "cf-promises -s json".
465 There is a fallback syntax available if you don't have cf-promises or
466 if your version doesn't support that option. See option `cfengine-cf-promises'.
469 ** Delete Selection mode can now be used without Transient Mark mode.
473 *** `desktop-auto-save-timeout' defines the number of seconds idle time
474 before auto-save of the desktop.
476 *** `desktop-restore-frames', enabled by default, allows saving and
477 restoring the frame/window configuration (frameset). Additional options
478 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
479 and `desktop-restore-forces-onscreen' offer further customization.
482 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
483 such as file ownership or permissions, are visible.
486 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
487 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
488 The results display in the mode line.
490 ** Electric Pair mode
492 *** New option `electric-pair-preserve-balance', enabled by default.
493 If non-nil, pairing/skipping only kicks in when that help the balance
494 of parentheses and quotes, i.e. the buffer should end up at least as
497 You can further control this behavior by adjusting the predicates
498 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
500 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
501 In `electric-pair-mode', the commands `backward-delete-char' and
502 `backward-delete-char-untabify' are now bound to electric variants
503 that delete the closer when invoked between adjacent pairs.
505 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
506 In `electric-pair-mode', inserting a newline between adjacent pairs
507 opens an extra newline after point, which is indented if
508 `electric-indent-mode' is also set.
510 *** New option `electric-pair-skip-whitespace', enabled by default.
511 This controls if skipping over closing delimiters should jump over any
512 whitespace slack. Setting it to `chomp' makes it delete this
513 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
515 *** New variables control the pairing in strings and comments.
516 You can customize `electric-pair-text-pairs' and
517 `electric-pair-text-syntax-table' to tweak pairing behavior inside
518 strings and comments.
521 ** New EPA option `epa-mail-aliases'.
522 You can set this to a list of email address aliases that `epa-mail-encrypt'
523 should use to find keys.
526 ** New ERC option `erc-accidental-paste-threshold-seconds'.
527 If set to a number, this can be used to avoid accidentally pasting large
528 amounts of data into the ERC input.
531 ** New ERT macro `skip-unless' allows skipping ERT tests.
532 See the ERT manual for details.
537 *** `eshell' now supports visual subcommands and options.
538 Eshell has been able to handle "visual" commands (interactive,
539 non-line oriented commands such as top that require display
540 capabilities not provided by eshell) by running them in an Emacs
541 terminal emulator. See `eshell-visual-commands'.
543 This feature has been extended to subcommands and options that make a
544 usually line-oriented command a visual command. Typical examples are
545 "git log" and "git <command> --help", which display their output in a
546 pager by default. See `eshell-visual-subcommands' and
547 `eshell-visual-options'.
550 *** New Eshell-Tramp module.
551 External su and sudo commands are now the default; the internal,
552 Tramp-using variants can still be used by enabling the eshell-tramp
556 ** New F90 mode option `f90-smart-end-names'.
560 *** Icomplete by default now applies to all forms of minibuffer completion.
561 The variable `icomplete-with-completion-tables' (now a user option)
562 controls this. To restore the old behavior, set it back to
563 '(internal-complete-buffer).
565 *** You can navigate through and select completions using the keys
566 from `icomplete-minibuffer-map'.
569 *** The string that separates potential completions is now a customizable
570 option (`icomplete-separator'). The default is " | " rather than ",".
573 *** New face `icomplete-first-match'; and new options
574 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
577 *** The option `icomplete-show-key-bindings' has been removed.
582 *** An Ido user manual is now included.
585 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
586 This means to use virtual buffers if the current ido input does not match
590 *** The variable `ido-decorations' can optionally have two new elements,
591 which are the brackets to use around the sole remaining completion.
596 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
597 visit the next image file and the previous image file in the same
598 directory, respectively.
601 *** New commands to show specific frames of multi-frame images.
602 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
603 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
606 *** New commands to speed up, slow down, or reverse animation.
607 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
608 speed up and slow down the animation. `a r' (`image-reverse-speed')
609 to reverse it and `a 0' (`image-reset-speed') to reset it.
612 *** The command `image-mode-fit-frame' deletes other windows.
613 When toggling, it restores the frame's previous window configuration.
614 It also has an optional frame argument, which can be used by Lisp
615 callers to fit the image to a frame other than the selected frame.
620 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
621 the symbol found near point.
624 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
625 will cycle through faces in `hi-lock-face-defaults' without prompting.
627 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
632 *** New Info face `info-index-match', used to highlight matches in index
633 entries displayed by `Info-index-next', `Info-virtual-index' and
637 *** The Info-edit command is obsolete. Editing Info nodes by hand
638 has not been relevant for some time.
643 *** New option `js-switch-indent-offset'.
646 *** Better indentation of multiple-variable declarations.
647 If a declaration spans several lines, variables on the following lines
648 are lined up to the first one.
651 *** Recognition and better indentation of continuations in array comprehensions.
654 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
659 *** Font locking for texinfo comments and new keywords.
661 *** Completion in Octave file buffers.
665 *** Jump to definition.
667 *** Documentation lookup/search.
670 ** OPascal mode is the new name for Delphi mode
673 *** All delphi-* variables and functions have been renamed to opascal-*.
674 Obsolete aliases exist for those likely to have been used externally.
677 *** The option `delphi-newline-always-indents' has been removed.
678 Use `electric-indent-mode' instead.
681 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
686 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
687 to filter the list of packages by a keyword.
690 *** In the `describe-package' buffer, there are now buttons listing the
691 keywords related to the package. Click on a button to see other packages
692 related to that keyword.
695 *** The format of `archive-contents' files, generated by package
696 repositories, has changed to allow a new (fifth) element in the data
697 vectors, containing an associative list with extra properties.
698 (For example, `describe-package' uses the `:url' extra property to
699 display a "Homepage" header.)
702 ** In Prolog mode, `prolog-use-smie' has been removed,
703 along with the non-SMIE indentation code.
707 *** The new command `remember-notes' creates a buffer that is saved on
708 `kill-emacs'. You can think of it as a *scratch* buffer whose content
709 is preserved. In fact, it was designed as a replacement for *scratch*
710 buffer and can be used that way by setting `initial-buffer-choice' to
711 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
712 Without the second change, the *scratch* buffer will still be there
713 for notes that do not need to be preserved.
715 *** The Remember package can now store notes in separates files.
716 You can use the new function `remember-store-in-files' within the
717 `remember-handler-functions' option. See `remember-data-directory'
718 and `remember-directory-file-name-format' for new options related to
723 *** Customize `rmail-mbox-format' to influence some minor aspects of
724 how Rmail displays non-MIME messages.
727 *** The `unrmail' command now converts from BABYL to mboxrd format,
728 rather than mboxo. Customize `unrmail-mbox-format' to change this.
733 *** Improved syntax highlighting and indentation.
736 *** New `electric-indent-mode' integration.
739 *** New option `ruby-encoding-magic-comment-style'.
742 *** New option `ruby-custom-encoding-magic-comment-template'.
745 *** New option `ruby-align-to-stmt-keywords'.
748 *** New option `ruby-align-chained-calls'.
751 *** More Ruby file types have been added to `auto-mode-alist'.
753 ** Search and Replace
756 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
757 starts a symbol (identifier) incremental search forward with the
758 symbol found near point added to the search string initially.
761 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
762 and adds it to the search string.
764 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
765 between nil and the value of the option `search-invisible' (or `open'
768 *** `query-replace' skips invisible text when `search-invisible' is nil,
769 and opens overlays with hidden text when `search-invisible' is `open'.
772 *** A negative prefix arg of replacement commands replaces backward.
773 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
774 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
777 *** By default, prefix arguments do not now terminate Isearch mode.
778 Set `isearch-allow-prefix' to nil to restore old behavior.
781 *** More Isearch commands accept prefix arguments, namely
782 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
786 *** Word search now matches whitespace at the beginning/end
787 of the search string if it contains leading/trailing whitespace.
788 In an incremental word search or when using a non-nil LAX argument
789 of `word-search-regexp', the lax matching can also match part of
790 the first word (in addition to the lax matching of the last word).
791 The same rules are now applied to the symbol search with the difference
792 that it matches symbols, and non-symbol characters between symbols.
795 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
798 ** The shell.el option `explicit-bash-args' includes --noediting by default.
799 All non-ancient Bash versions support this option.
804 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
807 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
809 ** SMIE indentation can be customized via `smie-config'.
810 Emacs can learn the appropriate indentation settings if you provide it
811 with an indented sample file.
814 ** New Term mode option `term-suppress-hard-newline'.
817 ** Todo mode has been rewritten and enhanced.
818 The Todo mode user manual describes all commands and most user
819 options. To support some of these features, a new file format is
820 used, which is incompatible with the old format; however, you can
821 convert old todo and done item files to the new format on initializing
822 the first new todo file, or at any later time with the provided
823 conversion command. The previous version of todo-mode.el has been
824 renamed to otodo-mode.el and is now obsolete. New features include:
826 *** Support for multiple todo files and archive files of done items.
828 *** Renaming, reordering, moving, merging, and deleting categories.
830 *** Sortable tabular summaries of categories and the item types they contain.
832 *** Cross-category lists of items filtered by specific criteria.
834 *** More fine-grained interaction with the Emacs diary, by being able to
835 decide for each todo item whether it appears in the Fancy Diary display.
837 *** Highly flexible new item insertion and item editing.
839 *** Moving items between categories, storing done items in their category
840 or in archive files, undoing or unarchiving done items.
842 *** Reprioritizing items by inputting a numerical priority.
844 *** Extensive customizability of operation and display, including many faces.
849 *** `trace-function' and `trace-function-background' no longer prompt for
850 the output buffer. Unless you use a prefix argument, they output to
854 *** With a prefix argument, `trace-function' and `trace-function-background'
855 will prompt for a "context". This is a Lisp expression, whose value at the
856 time the function is entered/exited is printed along with the function's
862 *** The experimental url syntax for remote file names has been removed.
865 *** New connection method "adb", which allows to access Android
866 devices by the Android Debug Bridge. The variable `tramp-adb-program'
867 can be used to adapt the path of the "adb" program, if needed.
870 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
871 "scpc" and "rsyncc" are discontinued. The ssh option
872 "ControlMaster=auto" is set automatically in all ssh-based methods,
873 when possible. See `tramp-use-ssh-controlmaster-options'.
876 *** Handlers for `file-acl' and `set-file-acl' for remote machines
877 which support POSIX ACLs.
880 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
881 for remote machines which support filesystem notifications.
884 ** New URL command `url-cookie-list' displays the current cookies,
885 and allows you to interactively remove cookies.
887 ** VC and related modes
890 *** In VC directory mode, `D' displays diffs between VC-controlled
891 whole tree revisions.
894 *** In VC directory mode, `L' lists the change log for the current VC
895 controlled tree in a window.
898 *** In VC directory mode, `I' shows a log of changes that will be
899 received with a pull operation.
902 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
903 under current version control system. When called with a prefix
904 argument, you can remove a file from the ignored file list.
909 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
912 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
915 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
916 are obsolete. Customize the `woman-*' faces instead.
921 *** iswitchb.el; use icomplete-mode.
924 *** longlines.el; use visual-line-mode.
933 *** terminal.el; use term.el instead.
936 *** the old version of todo-mode.el (renamed to otodo-mode.el).
939 *** xesam.el (owing to the cancellation of the XESAM project).
942 *** yow.el; use fortune.el or cookie1.el instead.
945 * New Modes and Packages in Emacs 24.4
948 ** New package `eww' is a built-in web browser.
949 It is only available if Emacs is compiled with libxml2 support.
952 ** New minor mode `superword-mode'.
953 This overrides the default word motion commands to treat "symbol_words"
954 as a single word, similar to what `subword-mode' does.
957 ** New package nadvice.el offers lighter-weight advice facilities.
960 *** add-function/remove-function, which can be used to add/remove code on any
961 function-carrying place, such as process-filters or `<foo>-function' hooks.
963 *** advice-add/advice-remove to add/remove a piece of advice on a named
964 function, much like `defadvice' does.
966 ** New package frameset.el.
967 It provides a set of operations to save a frameset (the state of all
968 or a subset of the existing frames and windows, somewhat similar to a
969 frame configuration), both in-session and persistently, and restore it
970 at some point in the future.
973 ** New package filenotify.el provides an interface for file system
974 notifications. It requires that Emacs be compiled with one of the
975 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
978 * Incompatible Lisp Changes in Emacs 24.4
981 ** `kill-region' has lost its `yank-handler' optional argument.
984 ** `(input-pending-p)' no longer runs other timers that are ready to run.
985 The new optional CHECK-TIMERS parameter allows for the prior behavior.
988 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
991 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
992 Some languages match those as »...«, and others as «...», so it is
993 better for Emacs to stay neutral by default.
996 ** In compiled Lisp files, the header no longer includes a timestamp.
999 ** The default file coding for Emacs Lisp files is now utf-8.
1000 (See `file-coding-system-alist'.) In most cases, this change is
1001 transparent, but files that contain unusual characters without
1002 specifying an explicit coding system may fail to load with obscure
1003 errors. You should either convert them to utf-8 or add an explicit
1007 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1008 It used to disable the minor mode, major mode, and text-property keymaps,
1009 whereas now it simply has higher precedence.
1011 ** Default process filters and sentinels are not nil any more.
1012 Instead they default to a function that does what the nil value used to do.
1015 ** `read-event' does not return decoded chars in ttys any more.
1016 As was the case in Emacs 22 and before, the decoding of terminal
1017 input, according to `keyboard-coding-system', is not performed in
1018 `read-event' any more. But unlike in Emacs 22, this decoding is still
1019 done before input-decode-map, function-key-map, etc.
1022 ** The option `inhibit-local-menu-bar-menus' has been removed.
1025 ** Frame-local variables that affect redisplay do not work any more.
1026 More specifically, redisplay does not bother to check for a frame-local
1027 value when looking up variables.
1030 ** nil and "unbound" are indistinguishable in `symbol-function'.
1031 `symbol-function' does not signal a `void-function' error any more.
1032 To determine if a symbol's function definition is void, use `fboundp'.
1035 ** `defadvice' does not honor the `freeze' flag and cannot advise
1036 special-forms any more.
1039 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1040 when lexical binding is enabled. Previously, VAR was bound to nil,
1041 which often led to spurious unused-variable warnings.
1044 ** The return value of `backup-buffer' has changed.
1045 The second argument is no longer an SELinux context, instead it is an
1046 alist of extended attributes as returned by the new function
1047 `file-extended-attributes'. The attributes can be applied to another
1048 file using `set-file-extended-attributes'.
1051 ** By default `copy-file' no longer copies file permission bits to an
1052 existing destination; and it sets the file permission bits of a newly
1053 created destination to those of the source, masked by the default file
1054 permissions. To copy the file permission bits, pass t as the
1055 PRESERVE-PERMISSIONS argument of `copy-file'.
1058 ** `visited-file-modtime' now returns -1 for nonexistent files.
1059 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1060 in the presence of files with negative time stamps.
1063 ** The cars of the elements in `interpreter-mode-alist' are now
1064 treated as regexps rather than literal strings.
1067 * Lisp Changes in Emacs 24.4
1070 ** The second argument of `eval' can now specify a lexical environment.
1073 ** New functions `special-form-p' and `macrop'.
1075 ** New macro `define-alternatives' can be used to define generic commands.
1076 Generic commands are interactive functions whose implementation can be
1077 selected among several alternatives, as a matter of user preference.
1079 ** The `defalias-fset-function' property lets you catch `defalias'
1080 calls, and redirect them to your own function, instead of `fset'.
1083 ** New variable `enable-dir-local-variables'.
1084 Directory-local variables are ignored if this is nil. This may be
1085 useful for modes that want to ignore directory-locals while still
1086 respecting file-local variables.
1089 ** New function `get-pos-property'.
1091 ** Completion changes
1093 *** The separator for `completing-read-multiple' can now be a regexp.
1094 The default separator has been changed to allow surrounding spaces
1097 *** The `common-substring' arg of `display-completion-list' is obsolete.
1098 Either use `completion-all-completions', which returns highlighted
1099 strings (including for partial or substring completion), or call
1100 `completion-hilit-commonality' to add the highlight.
1102 *** New function `completion-table-with-cache' is a wrapper for
1103 `completion-table-dynamic' that caches the result of the last lookup.
1105 *** New function `completion-table-merge' to combine several
1106 completion tables by merging their completions.
1108 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1109 let you enable symbol prettification (replacing a string like "lambda" with
1110 the Greek lambda character).
1115 *** Functions to pop up menus and dialogs now work on all terminals,
1116 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1117 `message-box', `yes-or-no-p', etc.
1119 The function `display-popup-menus-p' will now return non-nil for a
1120 display or frame whenever a mouse is supported on that display or
1123 *** New hook `tty-setup-hook'.
1127 *** New display action function `display-buffer-no-window' to not
1128 display the buffer in a window.
1130 *** New display action alist entry `allow-no-window' to indicate the
1131 caller of `display-buffer' is ready to handle the case of not
1132 displaying the buffer in a window.
1134 ** New hook `pre-redisplay-function'.
1137 ** New bool-vector set operation functions
1138 *** `bool-vector-exclusive-or'
1139 *** `bool-vector-union'
1140 *** `bool-vector-intersection'
1141 *** `bool-vector-set-difference'
1142 *** `bool-vector-not'
1143 *** `bool-vector-subsetp'
1144 *** `bool-vector-count-consecutive'
1145 *** `bool-vector-count-population'
1148 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1150 ** Error-handling changes
1153 *** New function `define-error'.
1156 *** `with-demoted-errors' takes an additional argument `format'.
1159 ** New macro `with-eval-after-load'.
1160 This is like the old `eval-after-load', but better behaved.
1163 ** New library subr-x.el with miscellaneous small utility functions
1164 *** `hash-table-keys'
1165 *** `hash-table-values'
1166 *** `string-blank-p'
1167 *** `string-empty-p'
1169 *** `string-reverse'
1170 *** `string-trim-left'
1171 *** `string-trim-right'
1173 *** `string-remove-prefix'
1174 *** `string-remove-suffix'
1177 ** Obsoleted functions
1180 *** `lisp-complete-symbol'
1181 *** `field-complete'
1182 *** `minibuffer-completion-contents'
1183 *** `isearch-nonincremental-exit-minibuffer'
1184 *** `isearch-filter-visible'
1185 *** `generic-make-keywords-list'
1186 *** `get-upcase-table' (use `case-table-get-table' instead).
1188 ** `with-wrapper-hook' is obsoleted by `add-function'.
1189 The few hooks that used with-wrapper-hook are replaced as follows:
1190 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1191 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1192 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1195 ** `byte-compile-interactive-only-functions' is now obsolete.
1196 To specify that a command should only be called interactively, give it
1197 a non-nil `interactive-only' property.
1200 ** `split-string' now takes an optional argument TRIM.
1201 The value, if non-nil, is a regexp that specifies what to trim from
1202 the start and end of each substring.
1205 ** New function `string-suffix-p'.
1207 ** File-handling changes
1210 *** Support for filesystem notifications.
1211 Emacs now supports notifications of filesystem changes, such as
1212 creation, modification, and deletion of files. This requires the
1213 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1214 MS-Windows systems, this is supported for Windows XP and newer
1218 *** The 9th element returned by `file-attributes' is now unspecified.
1219 Formerly, it was t if the file's gid would change if file were deleted
1220 and recreated. This value has been inaccurate for years on many
1221 platforms, and nobody seems to have noticed or cared.
1224 *** The 6th argument to `copy-file' has been renamed to
1225 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1226 Unix file permission bits as well as SELinux context.
1229 *** The function `file-ownership-preserved-p' now has an optional
1230 argument GROUP which causes it check for file group too. This can be
1231 used in place of the 9th element of `file-attributes'.
1234 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1235 argument, with the same interpretation as the returned value of
1236 `visited-file-modtime'.
1238 ** Autorevert changes
1241 *** If Emacs is compiled with file notification support, notifications
1242 are used instead of checking the time stamp of the files. You can
1243 disable this by setting the user option `auto-revert-use-notify' to
1244 nil. Alternatively, a regular expression of directories to be
1245 excluded from file notifications can be specified by
1246 `auto-revert-notify-exclude-dir-regexp'.
1249 *** The new user option `auto-revert-remote-files' enables reversion
1250 of remote files when set to non-nil.
1254 *** The function `face-spec-set' is now like `setq' for face specs.
1255 Its third arg now accepts values specifying a face spec type (defface,
1256 custom, or override spec), and the relevant spec is set accordingly.
1259 *** New function `add-face-text-property', which can be used to
1260 conveniently prepend/append new face properties.
1262 *** Face specs set via Custom themes now replace the `defface' spec
1263 rather than inheriting from it (as do face specs set via Customize).
1265 *** New face characteristic (supports :underline (:style wave))
1266 specifies whether or not the terminal can display a wavy line.
1269 *** New face spec attribute :distant-foreground
1270 specifies foreground to use if background color is near the foreground
1271 color that would otherwise have been used.
1276 *** `image-animated-p' is now `image-multi-frame-p'.
1277 It returns non-nil for any image that contains multiple frames,
1278 whether or not it specifies a frame delay.
1281 *** New variable `image-default-frame-delay' gives the frame delay for
1282 animated images which do not specify a frame delay.
1285 *** New functions `image-current-frame' and `image-show-frame' for getting
1286 and setting the current frame of a multi-frame image.
1291 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1292 **** object-name -> eieio-object-name
1293 **** object-class -> eieio-object-class
1294 **** object-class-fast -> eieio--object-class
1295 **** object-class-name -> eieio-object-class-name
1296 **** object-name-string -> eieio-object-name-string
1297 **** object-num-slots -> eieio--object-num-slots
1298 **** object-set-name-string -> eieio-object-set-name-string
1299 **** class-of -> eieio-object-class
1300 **** class-name -> eieio-class-name
1301 **** class-parent -> eieio-class-parent
1302 **** class-parents -> eieio-class-parents
1303 **** class-parents-fast -> eieio-class-parents-fast
1304 **** class-children -> eieio-class-children
1305 **** class-num-slots -> eieio--class-num-slots
1306 **** class-precedence-list -> eieio-class-precedence-list
1307 **** class-direct-subclasses -> eieio-class-children
1308 **** class-direct-superclasses -> eieio-class-parents
1310 ** Changes in encoding and decoding of text
1313 *** New coding-system `prefer-utf-8'.
1314 This is like `undecided' but prefers UTF-8 on decoding if the text to
1315 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1316 any non-ASCII characters are automatically encoded as UTF-8.
1319 *** New attributes of coding-systems whose type is `undecided'.
1320 Two new attributes, `:inhibit-null-byte-detection' and
1321 `:inhibit-iso-escape-detection', determine how to detect encoding of
1322 text that includes null bytes and ISO-2022 escape sequences,
1323 respectively. Each of these attributes can be either nil, zero, or
1324 t. If it is t, decoding text ignores null bytes and, respectively,
1325 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1326 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1327 text is encoded in one of the ISO-2022 encodings, such as
1328 iso-2022-7bit. If the value is zero, Emacs consults the variables
1329 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1331 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1332 UTF-8 encoding and decoding, whenever possible.
1334 These attributes are only meaningful for coding-systems of type
1335 `undecided'. (The type of a coding-system is determined by its
1336 `:coding-type' attribute and can be accessed by calling the
1337 `coding-system-type' function.)
1340 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1343 ** New functions `group-gid' and `group-real-gid'.
1346 ** The spelling of the rx.el category `chinese-two-byte' has been
1347 corrected (the first 'e' was missing).
1350 ** Minor internal changes to the details of lock files.
1351 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1352 If DIR/.#FILE already exists and is not an Emacs lock file,
1353 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1354 numbered lock files DIR/.#FILE.0...).
1355 On file systems that do not support symbolic links, the lock is now a
1356 regular file with contents being what would have been in the symlink.
1358 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1361 *** The package descriptor and name of global variables, constants,
1362 and functions should be separated by two hyphens if the symbol is not
1363 meant to be used by other packages.
1366 * Changes in Emacs 24.4 on Non-Free Operating Systems
1369 ** The procedure for building Emacs on MS-Windows has changed.
1370 It is now built by running the same configure script as on all other
1371 platforms. This requires the MSYS environment and MinGW development
1372 tools. See the updated instructions in nt/INSTALL for details.
1374 Using the Posix configure script and Makefile's also means a change in
1375 the directory structure of the Emacs installation on Windows. It is
1376 now the same as on GNU and Unix systems. In particular, the auxiliary
1377 programs, such as cmdproxy.exe and hexl.exe, are in
1378 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1379 version), version-independent site-lisp is in share/emacs/site-lisp,
1380 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1381 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1382 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1383 directories and will find the files in there automatically; there's no
1384 need to set any variables due to this change.)
1387 ** Emacs on Windows 2000 and later can now access files and directories
1388 whose names cannot be encoded in the current system codepage.
1390 The new variable `w32-unicode-filenames' controls this feature: if it
1391 is t, Emacs uses Unicode APIs to pass file names to system calls,
1392 which lifts the limitation of file names to the current locale.
1395 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1396 The backtrace is written to the 'emacs_backtrace.txt' file in the
1397 directory where Emacs was running.
1400 ** The variable `buffer-file-type' is no longer supported.
1401 Setting it has no effect, and %t in the mode-line format is ignored.
1402 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1403 modifying it has no effect.
1406 ** Lock files now work on MS-Windows.
1407 This helps to prevent losing your edits if the same file is being
1408 edited in another Emacs session or by another user. See the node
1409 "Interlocking" in the Emacs User Manual for the details. To disable
1410 file locking, customize `create-lockfiles' to nil.
1412 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1413 GNUstep and Mac OS X 10.4 use the old font backend.
1414 To use the old backend by default, do on the command line:
1415 % defaults write org.gnu.Emacs FontBackend ns
1417 ** Improved fullscreen support on Mac OS X.
1418 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1419 Customize `ns-use-native-fullscreen' to change the style.
1420 For Mac OS X 10.7 and newer, native is the default.
1422 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1423 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1424 does not apply to images.
1427 * Installation Changes in Emacs 24.3
1429 ** The default X toolkit is now Gtk+ version 3.
1430 If you don't pass `--with-x-toolkit' to configure, or if you use
1431 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1432 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1433 You can explicitly require a specific version by passing
1434 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1436 ** New configure option `--enable-link-time-optimization', to utilize
1437 an appropriate feature provided by GCC since version 4.5.0.
1439 ** New configure option `--without-all' to disable most of the optional
1440 features (image support, etc.) that are normally enabled by default.
1442 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1443 Emacs). If building with GCC, this enables compile-time checks that
1444 warn/give errors about possibly-questionable C code. On a recent GNU
1445 system there should be no warnings; on older and on non-GNU systems
1446 the results may be useful to developers.
1448 ** The configure option `--enable-use-lisp-union-type' has been
1449 renamed to `--enable-check-lisp-object-type', as the resulting
1450 Lisp_Object type no longer uses a union to implement the compile time
1451 check that this option enables.
1453 ** The configure option `--disable-maintainer-mode' has been removed,
1454 as it was confusingly-named and rarely useful.
1456 ** The configure options `--program-prefix', `--program-suffix', and
1457 `--program-transform-name' apply to more than just the installed
1458 binaries. Now they also affect the man pages, icons, and the
1459 etc/emacs.desktop file; but not the info pages, since this would break
1460 links between the various manuals.
1462 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1463 overwriting "emacs" in the installation bin/ directory with a link
1466 ** Emacs uses libtinfo in preference to libncurses, if available.
1468 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1469 /usr/pkg/lib to the linker search path. You must add them yourself if
1472 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1473 (from the bin and libexec directories, respectively). The former is
1474 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1477 * Startup Changes in Emacs 24.3
1479 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1480 lisp/ directory. There should not be any there anyway. If you have
1481 been adding them there, put them somewhere else; e.g., site-lisp.
1483 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1486 * Changes in Emacs 24.3
1490 *** `C-h f' (`describe-function') can now perform autoloading.
1491 When this command is called for an autoloaded function whose docstring
1492 contains a key substitution construct, that function's library is
1493 automatically loaded, so that the documentation can be shown
1494 correctly. To disable this, set `help-enable-auto-load' to nil.
1496 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1497 even after their associated libraries have been loaded (and the
1498 autoloads have been redefined as functions).
1502 *** Images displayed via ImageMagick now support transparency and the
1503 :background image specification property.
1505 *** When available, ImageMagick support is automatically enabled.
1506 It is no longer necessary to call `imagemagick-register-types'
1507 explicitly to install ImageMagick image types; that function is called
1508 automatically at startup, or when customizing an imagemagick- option.
1510 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1511 ImageMagick to view images. (You must call `imagemagick-register-types'
1512 afterwards if you do not use customize to change this.)
1514 *** The new variable `imagemagick-enabled-types' also affects which
1515 ImageMagick types are treated as images. The function
1516 `imagemagick-filter-types' returns the list of types that will be
1521 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1522 next and previous path separator, respectively.
1524 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1525 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1526 non-nil before enabling the mode.
1530 *** New option `mode-line-default-help-echo' specifies the help text
1531 (shown in a tooltip or in the echo area) for any part of the mode line
1532 that does not have its own specialized help text.
1534 *** You can now click mouse-3 in the coding system indicator to invoke
1535 `set-buffer-file-coding-system'.
1537 ** Server and client
1539 *** emacsclient now obeys string values for `initial-buffer-choice',
1540 if it is told to open a new frame without specifying any file to visit
1541 or expression to evaluate.
1543 *** New option `server-auth-key' specifies a shared server key.
1545 ** Emacs now generates backtraces on fatal errors.
1546 On encountering a fatal error, Emacs now outputs a textual description
1547 of the fatal signal, and a short backtrace on platforms like glibc
1548 that support backtraces.
1550 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1551 This minor mode replaces `toggle-read-only', which is now obsolete.
1553 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1554 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1555 respectively, without exiting from the prompt.
1557 ** In the Package Menu, newly-available packages are listed as "new",
1558 and sorted above the other "available" packages by default.
1560 ** If your Emacs was built from a repository checkout, the new variable
1561 `emacs-bzr-version' contains information about the bzr revision used.
1563 ** New option `create-lockfiles' specifies usage of lockfiles.
1564 It defaults to t. Changing it to nil inhibits the creation of lock
1565 files (use this with caution).
1567 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1568 variables on remote hosts.
1570 ** The entry for PCL-CVS has been removed from the Tools menu.
1571 The PCL-CVS commands are still available via the keyboard.
1573 ** Using "unibyte: t" in Lisp source files is obsolete.
1574 Use "coding: raw-text" instead.
1576 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1577 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1578 The previous binding, introduced in Emacs 24.1, was a mistake, because
1579 `C-c LETTER' bindings are reserved for user customizations.
1581 ** Internationalization
1583 *** New language environment: Persian.
1585 *** New input method `vietnamese-vni'.
1587 ** Nextstep (GNUstep / Mac OS X) port
1589 *** Support for fullscreen and the frame parameter fullscreen.
1591 *** A file dialog is used for open/save operations initiated from the
1595 * Editing Changes in Emacs 24.3
1597 ** Search and Replace
1599 *** Non-regexp Isearch now performs "lax" space matching.
1600 Each sequence of spaces in the supplied search string may match any
1601 sequence of one or more whitespace characters, as specified by the
1602 variable `search-whitespace-regexp'. (This variable is also used by a
1603 similar existing feature for regexp Isearch.)
1605 *** New Isearch command `M-s SPC' toggles lax space matching.
1606 This applies to both ordinary and regexp Isearch.
1608 *** New option `replace-lax-whitespace'.
1609 If non-nil, `query-replace' uses flexible whitespace matching too.
1612 *** Global `M-s _' starts a symbol (identifier) incremental search,
1613 and `M-s _' in Isearch toggles symbol search mode.
1614 `M-s c' in Isearch toggles search case-sensitivity.
1616 ** Navigation commands
1618 *** New binding `M-g c' for `goto-char'.
1620 *** New binding `M-g TAB' for `move-to-column'.
1622 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1623 interactively with no prefix arg. Previously, it moved to column 1.
1625 ** New option `yank-handled-properties' allows processing of text
1626 properties on yanked text, in ways that are more general than just
1627 removing them (as is done by `yank-excluded-properties').
1629 ** New option `delete-trailing-lines' specifies whether
1630 M-x delete-trailing-whitespace should delete trailing lines at the end
1631 of the buffer. It defaults to t.
1633 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1635 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1636 `ucs-insert' is now an obsolete alias for `insert-char'.
1638 ** The `z' key no longer has a binding in most special modes.
1639 It used to be bound to `kill-this-buffer', but `z' is too easy to
1642 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1643 It copies the region-rectangle as the last rectangle kill.
1647 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1649 *** New option `register-separator' specifies the register containing
1650 the text to put between collected texts for use with
1651 M-x append-to-register and M-x prepend-to-register.
1654 * Changes in Specialized Modes and Packages in Emacs 24.3
1656 ** Common Lisp emulation (CL)
1658 *** CL's main entry is now (require 'cl-lib).
1659 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1660 i.e., all its definitions have the "cl-" prefix (and internal definitions
1661 use the "cl--" prefix).
1663 If `cl' provided a feature under the name `foo', then `cl-lib'
1664 provides it under the name `cl-foo' instead; with the exceptions of the
1665 few `cl' definitions that had to use `foo*' to avoid conflicts with
1666 pre-existing Elisp entities. These have been renamed to `cl-foo'
1667 rather than `cl-foo*'.
1669 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1670 provide the old, non-prefixed names. Some exceptions are listed below:
1672 *** `cl-flet' is not like `flet' (which is deprecated).
1673 Instead it obeys the behavior of Common-Lisp's `flet'.
1674 In particular, in cl-flet function definitions are lexically scoped,
1675 whereas in flet the scoping is dynamic.
1677 *** `cl-labels' is slightly different from `labels'.
1678 The difference is that it relies on the `lexical-binding' machinery
1679 (as opposed to the `lexical-let' machinery used previously) to capture
1680 definitions in closures, so such closures will only work if `lexical-binding'
1683 *** `cl-letf' is not exactly like `letf'.
1684 The only difference is in details that relate to some deprecated usage
1685 of `symbol-function' in place forms.
1687 *** `progv' was rewritten to use the `let' machinery.
1688 A side effect is that variables without corresponding values are bound
1689 to nil rather than being made unbound.
1691 *** The following methods of extending `setf' are obsolete
1692 (use features from gv.el instead):
1693 `define-modify-macro' (use `gv-letplace')
1694 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1695 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1696 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1700 *** Changes are now highlighted using the same color scheme as in
1701 modern VCSes. Deletions are displayed in red (new faces
1702 `diff-refine-removed' and `smerge-refined-removed', and new definition
1703 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1704 and `smerge-refined-added', and new definition of `diff-added').
1706 *** The variable `diff-use-changed-face' defines whether to use the
1707 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1708 changes in context diffs.
1710 *** The new command `diff-delete-trailing-whitespace' removes trailing
1711 whitespace introduced by a diff.
1713 ** Ediff now uses the same color scheme as Diff mode.
1717 A new version of python.el, which provides several new features, including:
1718 per-buffer shells, better indentation, Python 3 support, and improved
1719 shell-interaction compatible with iPython (and virtually any other
1722 *** Some user options have been replaced/renamed, including (old -> new):
1723 **** python-indent -> python-indent-offset
1724 **** python-guess-indent -> python-indent-guess-indent-offset
1725 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1726 **** python-use-skeletons -> python-skeleton-autoinsert
1728 *** Some user options have been removed, including:
1730 **** `python-indent-string-contents': Strings are never indented.
1732 **** `python-honour-comment-indentation':
1733 Comments are always considered as indentation markers.
1735 **** `python-continuation-offset': Indentation is automatically
1736 calculated in a pep8 compliant way depending on the context.
1738 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1739 Have no direct mapping as the shell interaction is completely different.
1741 **** `python-python-command', `python-jython-command':
1742 Replaced by `python-shell-interpreter'.
1744 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1745 `python-pdbtrack-minor-mode-string', `python-source-modes':
1748 *** Some commands have been replaced (old -> new):
1749 **** python-insert-class -> python-skeleton-class
1750 **** python-insert-def -> python-skeleton-def
1751 **** python-insert-for -> python-skeleton-for
1752 **** python-insert-if -> python-skeleton-if
1753 **** python-insert-try/except -> python-skeleton-try
1754 **** python-insert-try/finally -> python-skeleton-try
1755 **** python-insert-while -> python-skeleton-while
1756 **** python-find-function -> python-nav-jump-to-defun
1757 **** python-next-statement -> python-nav-forward-sentence
1758 **** python-previous-statement -> python-nav-backward-sentence
1759 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1760 **** python-end-of-defun-function -> python-nav-end-of-defun
1761 **** python-send-buffer -> python-shell-send-buffer
1762 **** python-send-defun -> python-shell-send-defun
1763 **** python-send-region -> python-shell-send-region
1764 **** python-send-region-and-go -> emulate with python-shell-send-region
1765 and python-shell-switch-to-shell
1766 **** python-send-string -> python-shell-send-string
1767 **** python-switch-to-python -> python-shell-switch-to-shell
1768 **** python-describe-symbol -> python-eldoc-at-point
1772 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1774 *** The D-Bus object manager interface is implemented.
1776 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1777 if their value does not fit into Emacs's integer range.
1779 *** The function `dbus-call-method' is now non-blocking.
1780 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1782 *** Signals can also be sent as unicast messages.
1784 *** The argument list of `dbus-register-signal' has been extended,
1785 according to the new match rule types of D-Bus.
1787 *** `dbus-init-bus' supports private connections.
1789 *** There is a new function `dbus-setenv'.
1791 ** `desktop-path' no longer includes the "." directory.
1792 Desktop files are now located in ~/.emacs.d by default.
1796 *** `dired-do-async-shell-command' executes each file sequentially
1797 if the command ends in `;' (when operating on multiple files).
1798 Otherwise, it executes the command on each file in parallel.
1800 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1801 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1804 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1805 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1806 mark/unmark/flag all files in the active region.
1808 *** The minibuffer default for `=' (`dired-diff') has changed.
1809 It is now the backup file for the file at point, if one exists.
1810 In Transient Mark mode the default is the file at the active mark.
1812 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1813 The global binding for `M-=', `count-words-region' is in effect.
1817 *** New module "notifications", which can send a notification when you
1818 receive a private message or your nickname is mentioned.
1820 *** ERC will look up server/channel names via auth-source and use any
1823 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1824 only applies to messages sent by lurkers.
1826 ** reStructuredText mode
1828 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1829 fontification, comment handling, and customization have all been revised
1832 *** Support for `imenu' and `which-function-mode'.
1834 *** The reStructuredText syntax is more closely covered.
1835 Sphinx support has been improved.
1837 *** `rst-insert-list' inserts new list or continues existing lists.
1839 *** A negative prefix argument always works for `rst-adjust'.
1841 *** The window configuration is reset after displaying a TOC.
1843 *** The constant `rst-version' describes the rst.el package version.
1847 *** Support for percent literals and recognition of regular expressions
1848 in method calls without parentheses with more methods, including Cucumber
1851 *** Improved syntax highlighting and indentation.
1853 *** New command `ruby-toggle-block', bound to `C-c {'.
1855 *** Some non-standard keybindings/commands have been removed:
1857 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1859 **** `ruby-mark-defun'; use `mark-defun'.
1861 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1862 appropriate settings for the variables `beginning-of-defun-function'
1863 and `end-of-defun-function'.
1865 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1866 `reindent-then-newline-and-indent' and `newline' have been removed.
1868 ** Shell Script mode
1870 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1872 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1874 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1878 *** The free software compiler GHDL is supported (and now the default).
1880 *** Support for the VHDL-AMS packages has been added/updated.
1882 *** Updated to the 2002 revision of the VHDL standard.
1884 *** Accepts \r and \f as whitespace.
1888 *** The faces used by Apropos are now directly customizable.
1889 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1890 see the `apropos' Custom group for details.
1892 *** The old options whose values specified faces to use have been removed
1893 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1894 `apropos-match-face' and `apropos-property-face'.).
1898 *** This package has been rewritten to use Tabulated List mode.
1900 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1901 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1905 *** Algebraic simplification mode is now the default.
1906 To restrict to the limited simplifications given by the former
1907 default simplification mode, use `m I'.
1911 *** You can customize the header text that appears above each calendar month.
1912 See the variable `calendar-month-header'.
1914 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1916 *** The calendars produced by cal-html include holidays.
1917 Customize `cal-html-holidays' to change this.
1921 *** The major modes from the parser generators "Bovine" and "Wisent"
1922 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1923 are in `auto-mode-alist', and the corresponding manuals are included.
1927 **** Menu support for the "Configuration" feature. This allows users to
1928 choose the active configuration (such as debug or install) from the menu.
1930 **** New command `ede-set' to interactively set project-local variables.
1932 **** Support for compiling, debugging, and running in "generic" projects.
1934 **** Autoconf editing support for M4 macros with complex arguments.
1936 **** Compilation support for the "linux" project type.
1938 **** "simple" projects have been removed; use "generic" projects instead.
1942 **** Support for parsing #include statements inside a namespace in C/C++.
1944 **** Improved support for 'extern "C"' declarations in C/C++.
1946 **** The ability to ignore more common special C/C++ preprocessor symbols,
1947 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1948 If available, include cdefs.h as an additional source of preprocessor symbols.
1950 **** Improved C/C++ function pointer parsing.
1952 **** In Python, support for converting imports to include file names.
1954 **** Ability to dynamically determine the Python load path.
1956 **** Support for the Python 'WITH' and 'AT' keywords.
1958 **** Improved tooltip completion.
1962 **** The SRecode manual is now included.
1964 **** Tag generation supports constructor/destructor settings and system
1965 include differentiation.
1967 **** Addition of 'Framework' support: Frameworks are specified when a
1968 particular kind of library (such as Android) is needed in a common language
1971 **** Support for nested templates and let variables override based on priority.
1973 **** Support for merging tables from multiple related modes, such as
1974 default -> c++ -> arduino.
1976 ** Compile has a new option `compilation-always-kill'.
1980 *** `custom-reset-button-menu' now defaults to t.
1982 *** Non-option variables are never matched in `customize-apropos' and
1983 `customize-apropos-options' (i.e., the prefix argument does nothing for
1984 these commands now).
1988 *** The variables `term-default-fg-color' and `term-default-bg-color'
1989 are now deprecated in favor of the customizable face `term'.
1991 *** You can customize how to display ANSI terminal colors and styles
1992 by customizing the corresponding `term-color-<COLOR>',
1993 `term-color-underline' and `term-color-bold' faces.
1997 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1999 *** Remote processes are now also supported on remote MS-Windows hosts.
2003 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2004 Previously, this slot stored semicolon-separated attribute-value pairs
2005 appended to some imap URLs, but this is not compatible with RFC 3986.
2006 So now the `filename' slot stores the entire path and query components,
2007 and the `attributes' slot is always nil.
2009 *** New function `url-encode-url' for encoding a URI string.
2010 The `url-retrieve' function now uses this to encode its URL argument,
2011 in case that is not properly encoded.
2013 ** notifications.el supports now version 1.2 of the Notifications API.
2014 The function `notifications-get-capabilities' returns the supported
2017 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2018 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2019 `flymake-warning-bitmap'.
2021 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2022 specifying URL types that should be converted to remote file names at
2023 the FFAP prompt. The default is now '("ftp").
2025 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2026 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2028 ** New option `mouse-avoidance-banish-position' specifies where the
2029 `banish' mouse avoidance setting moves the mouse.
2031 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2032 closing brackets to be aligned with the line of the opening bracket.
2034 ** In Proced mode, new command `proced-renice' renices marked processes.
2036 ** New option `async-shell-command-buffer' specifies the buffer to use
2037 for a new asynchronous `shell-command' when the default output buffer
2038 `*Async Shell Command*' is already in use.
2040 ** SQL mode has a new option `sql-db2-escape-newlines'.
2041 If non-nil, newlines sent to the command interpreter will be escaped
2042 by a backslash. The default does not escape the newlines and assumes
2043 that the sql statement will be terminated by a semicolon.
2045 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2046 (and modes that derive from it), sorts the column at point, or the Nth
2047 column if a numeric prefix argument is given.
2049 ** `which-func-modes' now defaults to t, so Which Function mode, when
2050 enabled, applies to all applicable major modes.
2052 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2055 ** Follow mode no longer works by using advice.
2056 The option `follow-intercept-processes' has been removed.
2058 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2060 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2061 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2062 *** semantic-change-hooks -> semantic-change-functions
2063 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2064 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2065 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2066 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2067 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2068 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2069 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2070 *** rcirc-activity-hooks -> rcirc-activity-functions
2071 *** rcirc-print-hooks -> rcirc-print-functions
2072 *** dbus-event-error-hooks -> dbus-event-error-functions
2073 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2074 *** checkdoc-style-hooks -> checkdoc-style-functions
2075 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2076 *** archive-extract-hooks -> archive-extract-hook
2077 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2078 *** hfy-post-html-hooks -> hfy-post-html-hook
2079 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2080 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2081 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2082 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2084 ** Obsolete packages
2087 In most cases, assoc+member+push+delq work just as well.
2088 And in any case it's just a terrible package: ugly semantics, terrible
2089 inefficiency, and not namespace-clean.
2098 * Incompatible Lisp Changes in Emacs 24.3
2100 ** Docstrings starting with `*' no longer indicate user options.
2101 Only variables defined using `defcustom' are considered user options.
2102 The function `user-variable-p' is now an obsolete alias for
2103 `custom-variable-p'.
2105 ** The return values of `defalias', `defun' and `defmacro' have changed,
2106 and are now undefined. For backwards compatibility, `defun' and
2107 `defmacro' currently return the name of the newly defined
2108 function/macro, but this should not be relied upon.
2110 ** `random' by default now returns a different random sequence in
2111 every Emacs run. Use `(random S)', where S is a string, to set the
2112 random seed to a value based on S, in order to get a repeatable
2113 sequence in later calls.
2115 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2116 that substring is inserted literally even if the LITERAL arg is
2117 non-nil, instead of causing an error to be signaled.
2119 ** `select-window' now always makes the window's buffer current.
2120 It does so even if the window was selected before.
2122 ** The function `x-select-font' can return a font spec, instead of a
2123 font name as a string. Whether it returns a font spec or a font name
2124 depends on the graphical library.
2126 ** `face-spec-set' no longer sets frame-specific attributes when the
2127 third argument is a frame (that usage was obsolete since Emacs 22.2).
2129 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2131 ** The CL package's `get-setf-method' function no longer exists.
2132 Generalized variables are now part of core Emacs Lisp, and implemented
2133 differently to the way cl.el used to do it. It is not possible to
2134 define a compatible replacement for `get-setf-method'. See the file
2135 gv.el for internal details of the new implementation.
2137 ** The arguments of `dbus-register-signal' are no longer just strings,
2138 but keywords or keyword-string pairs. The old argument list will
2139 still be supported for Emacs 24.x.
2141 ** Miscellaneous name changes
2142 Some Lisp symbols have been renamed to correct their spelling,
2143 or to be more consistent with standard Emacs terminology.
2145 *** Renamed functions
2146 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2147 **** inactivate-input-method -> deactivate-input-method
2148 **** quail-inactivate -> quail-deactivate
2149 **** robin-inactivate -> robin-deactivate
2150 **** viper-inactivate-input-method -> viper-deactivate-input-method
2151 **** viper-inactivate-input-method-action ->
2152 viper-deactivate-input-method-action
2153 **** ucs-input-inactivate -> ucs-input-deactivate
2156 The old hooks are still supported for backward compatibility, but they
2157 are deprecated and will be removed eventually.
2158 **** input-method-inactivate-hook -> input-method-deactivate-hook
2159 **** robin-inactivate-hook -> robin-deactivate-hook
2160 **** quail-inactivate-hook -> quail-deactivate-hook
2162 *** Renamed variables
2163 **** follow-deactive-menu -> follow-inactive-menu
2164 **** inactivate-current-input-method-function ->
2165 deactivate-current-input-method-function
2167 ** Some obsolete functions, variables, and faces have been removed:
2168 *** `last-input-char', `last-command-char', `unread-command-char'
2169 *** `facemenu-unlisted-faces'
2170 *** `rmail-decode-mime-charset'
2171 *** `iswitchb-read-buffer'
2172 *** `sc-version', `sc-submit-bug-report'
2173 *** `set-char-table-default'
2174 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2175 *** `compile-internal'
2177 *** `mode-line-inverse-video'
2178 *** `follow-mode-off-hook'
2179 *** `cvs-commit-buffer-require-final-newline'
2180 (use `log-edit-require-final-newline' instead)
2181 *** `cvs-changelog-full-paragraphs'
2182 (use `log-edit-changelog-full-paragraphs' instead)
2183 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2184 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2185 *** `vc-master-templates' (use `vc-handled-backends' instead)
2186 *** `vc-checkout-carefully'
2189 * Lisp Changes in Emacs 24.3
2191 ** CL-style generalized variables are now in core Elisp.
2192 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2193 You can define your own generalized variables using `gv-define-simple-setter',
2194 `gv-define-setter', etc.
2196 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2197 This can significantly speed up execution of non-byte-compiled code,
2198 but can also bump into previously unnoticed cyclic dependencies.
2199 These are generally harmless: they will simply cause the macro calls
2200 to be left for later expansion (as before), but will result in a
2201 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2202 You may wish to restructure your code so this does not happen.
2204 ** New sampling-based Elisp profiler.
2205 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2206 When finished, use M-x profiler-stop. The sampling rate can be based on
2207 CPU time or memory allocations.
2209 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2210 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2212 ** New macros `setq-local' and `defvar-local'.
2214 ** Face underlining can now use a wave.
2216 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2217 of `read-regexp' accepts a string ending with a colon and space, and its
2218 second argument DEFAULTS can be a list of strings accessible via `M-n'
2219 in the minibuffer ahead of other hard-coded useful regexp-related values.
2220 More commands use `read-regexp' now to read their regexp arguments.
2224 *** New function `completion-table-with-quoting' to handle completion
2225 in the presence of quoting, such as file completion in shell buffers.
2227 *** New function `completion-table-subvert' to use an existing completion
2228 table, but with a different prefix.
2232 *** New error type and new function `user-error'.
2233 These do not trigger the debugger.
2235 *** New option `debugger-bury-or-kill', saying what to do with the
2236 debugger buffer when exiting debug.
2238 *** Set `debug-on-message' to enter the debugger when a certain
2239 message is displayed in the echo area. This can be useful when trying
2240 to work out which code is doing something.
2242 *** New var `inhibit-debugger', automatically set to prevent accidental
2243 recursive invocations.
2247 *** New command `fit-frame-to-buffer' adjusts the frame height to
2250 *** The command `fit-window-to-buffer' can adjust the frame height
2251 if the new option `fit-frame-to-buffer' is non-nil.
2253 *** New macro `with-temp-buffer-window', similar to
2254 `with-output-to-temp-buffer'.
2256 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2259 *** New option `switch-to-buffer-preserve-window-point' to restore a
2260 window's point when switching buffers.
2262 *** New display action alist entries `window-height' and `window-width'
2263 specify the size of new windows created by `display-buffer'.
2265 *** New display action alist entry `pop-up-frame-parameters', if
2266 non-nil, specifies frame parameters to give any newly-created frame.
2268 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2269 tells display action functions to avoid changing which frame is
2272 *** New display action alist entry `previous-window', if non-nil,
2273 specifies window to reuse in `display-buffer-in-previous-window'.
2275 *** New display action functions `display-buffer-below-selected',
2276 and `display-buffer-in-previous-window'.
2278 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2279 now accept a third argument to avoid choosing the selected window.
2281 *** Additional values recognized for option `window-combination-limit'.
2283 *** The following variables are obsolete, as they can be replaced by
2284 appropriate entries in the `display-buffer-alist' function introduced
2286 **** `dired-shrink-to-fit'
2287 **** `display-buffer-reuse-frames'
2288 **** `display-buffer-function'
2289 **** `special-display-buffer-names'
2290 **** `special-display-frame-alist'
2291 **** `special-display-function'
2292 **** `special-display-regexps'
2296 *** `current-time-string' no longer requires that its argument's year
2297 must be in the range 1000..9999. It now works with any year supported
2298 by the underlying C implementation.
2300 *** `current-time' now returns extended-format time stamps
2301 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2302 PSEC is typically a multiple of 1000 on current machines. Other
2303 functions that use this format, such as `file-attributes' and
2304 `format-time-string', have been changed accordingly. Old-format time
2305 stamps are still accepted.
2307 *** The format of timers in `timer-list' and `timer-idle-list' is now
2308 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2309 The PSECS slot is new, and uses picosecond resolution. It can be
2310 accessed via the new `timer--psecs' accessor.
2312 *** Last-modified time stamps in undo lists now are of the form
2313 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2317 *** Improved security when handling persistent objects:
2319 **** `eieio-persistent-read' now features optional arguments for specifying
2320 the class to load, as well as a flag stating whether subclasses are allowed;
2321 if provided, other classes will be rejected by the reader. For
2322 compatibility with existing code, if the class is omitted only a
2325 **** New specialized reader for pulling in classes and signaling errors
2326 without evaluation of suspicious code.
2328 **** All slots that contain objects must have a :type. Slots with lists
2329 of objects must use a new type predicate for a list of an object type.
2331 *** Support for `find-function' and similar utilities, through the addition
2332 of filename support to generated symbols.
2334 ** Floating point functions now always return special values like NaN,
2335 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2336 Previously, they returned NaNs on some platforms but signaled errors
2337 on others. The affected functions are acos, asin, tan, exp, expt,
2338 log, log10, sqrt, and mod.
2340 ** New fringe bitmap `exclamation-mark'.
2342 ** Miscellaneous changes to special forms and macros
2344 *** `defun' and `defmacro' are now macros rather than special forms.
2346 *** `kbd' is now a function rather than a macro.
2348 ** Miscellaneous new functions
2350 *** `set-temporary-overlay-map' sets up a temporary keymap that
2351 takes precedence over most other maps for a short while (normally one key).
2353 *** `autoloadp' tests if its argument is an autoloaded object.
2355 *** `autoload-do-load' performs the autoloading operation.
2357 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2359 *** `file-name-base' returns a file name sans directory and extension.
2361 *** `function-get' fetches a function property, following aliases.
2363 *** `posnp' tests if an object is a `posn'.
2365 *** `system-users' returns the user names on the system.
2367 *** `system-groups' returns the group names on the system.
2369 *** `tty-top-frame' returns the topmost frame of a text terminal.
2371 ** The following functions and variables are obsolete:
2372 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2373 *** `buffer-has-markers-at'
2374 *** `macro-declaration-function' (use `macro-declarations-alist')
2375 *** `window-system-version' (provides no useful information)
2376 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2377 *** `query-replace-interactive'
2378 *** `font-list-limit' (has had no effect since Emacs < 23)
2381 * Changes in Emacs 24.3 on Non-Free Operating Systems
2383 ** Cygwin builds can use the native MS Windows user interface.
2384 Pass `--with-w32' to configure. The default remains the X11 interface.
2386 ** Two new functions are available in Cygwin builds:
2387 `cygwin-convert-file-name-from-windows' and
2388 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2389 code to access the Cygwin file-name mapping machinery to convert
2390 between Cygwin and Windows-native file and directory names.
2392 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2393 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2394 `mouse-autoselect-window'.
2396 ** On MS Windows Vista and later Emacs now supports symbolic links.
2398 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2399 support for libxml2, even if its presence is detected.
2401 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2403 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2404 directories to the search path. You must add them yourself if you want them.
2407 * Changes in Emacs 24.2
2409 ** This is mainly a bug-fix release.
2412 * Installation Changes in Emacs 24.1
2414 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2415 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2416 also depend on Gtk+. You can disable them with --without-rsvg and
2419 ** Emacs can be compiled with GnuTLS support.
2420 This happens by default if a suitably recent version of the library is
2421 found at build time. To prevent this, use the configure option
2422 `--without-gnutls'. See below for GnuTLS features.
2424 ** Emacs can be compiled with SELinux support.
2425 This happens by default if a suitably recent version of the library is
2426 found at build time. To prevent this, use the configure option
2427 `--without-selinux'. See below for SELinux features.
2429 ** Emacs can be compiled with ImageMagick support.
2430 This happens by default if a suitably recent version of the library is
2431 found at build time. To prevent this, use the configure option
2432 `--without-imagemagick'. See below for ImageMagick features.
2433 This feature is not available for the Nextstep or MS ports.
2435 ** Emacs can be compiled with libxml2 support.
2436 This happens by default if a suitably recent version of the library is
2437 found at build time. To prevent this, use the configure option
2438 `--without-xml2'. See below for libxml2 features.
2440 ** By default, the installed Info and man pages are compressed.
2441 You can disable this by configuring --without-compress-info.
2443 ** New configure option --with-wide-int.
2444 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2445 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2448 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2449 These provide no new functionality, they just remove the need to edit
2450 lib-src/Makefile by hand in order to use the associated features.
2452 ** New configure option --enable-use-lisp-union-type.
2453 This is only useful for Emacs developers to debug certain types of bugs.
2454 This is not a new feature; only the configure flag is new.
2456 ** The standalone programs digest-doc and sorted-doc are removed.
2457 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2459 ** The standalone program `fakemail' is removed.
2460 If you need it, feedmail.el provides a superset of the functionality.
2463 * Startup Changes in Emacs 24.1
2465 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2466 command line arguments, and the EMACS_UNIBYTE environment variable, no
2467 longer have any effect. (They were declared obsolete in Emacs 23.)
2469 ** New command line option `--no-site-lisp' removes site-lisp directories
2470 from load-path. -Q now implies this. This option does not affect the
2471 EMACSLOADPATH environment variable (and hence has no effect for
2475 * Changes in Emacs 24.1
2479 *** Many packages now use the `completion-at-point' command,
2480 rather than implementing separate completion commands.
2482 *** `completion-at-point' now handles tags and semantic completion.
2484 *** Completion in a non-minibuffer now tries to detect the end of completion
2485 and pops down the *Completions* buffer accordingly.
2487 *** New option `completion-cycle-threshold' allows completion cycling.
2489 *** New option `completion-category-overrides' for overriding the
2490 default completion style in certain circumstances.
2492 *** New completion style `substring'.
2494 *** Completion of buffer names uses `substring' completion by default.
2496 *** The option `widget-complete-field' has been removed.
2500 *** The first time you try sending mail, Emacs asks for a mail method.
2501 This is implemented by a new default for `send-mail-function', which
2502 is `sendmail-query-once'. This offers to use the smtpmail package, or
2503 to use the old defaults relying on external mail facilities
2504 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2505 `mailclient-send-it' on Windows).
2507 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2508 transfers the report to your desktop's preferred mail client, if there
2509 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2512 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2513 and Mail mode changes
2515 ** Emacs server and client changes
2517 *** New option `server-port' specifies the port for TCP Emacs servers.
2519 *** New emacsclient argument -q/--quiet suppresses some status messages.
2521 *** New emacsclient argument --frame-parameters specifies the frame
2522 parameters of any newly-created graphical frame.
2524 *** If emacsclient shuts down due to Emacs signaling an error,
2525 its exit status is 1.
2527 *** New emacsclient argument --parent-id ID.
2528 This opens a client frame in parent X window ID, via XEmbed, similar
2529 to the --parent-id argument to Emacs.
2531 ** Internationalization changes
2533 *** Emacs now supports display and editing of bidirectional text.
2534 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2535 displayed in the correct visual order as expected by users of those
2536 scripts. The display reordering is a "full bidirectionality" class
2537 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2538 with no RTL text should look exactly the same as before.
2540 **** New buffer-local variable `bidi-display-reordering'.
2541 To disable display reordering in a buffer, change this to nil.
2543 **** New buffer-local variable `bidi-paragraph-direction'.
2544 If nil (the default), Emacs determines the base direction of each
2545 paragraph from its text, as specified by the UBA. Setting the value
2546 to `right-to-left' or `left-to-right' forces a base direction on each
2549 Paragraphs with right-to-left base direction are displayed starting at
2550 the right window edge.
2552 *** Enhanced support for characters with no glyphs in available fonts,
2553 or, on text terminals, characters that cannot be encoded by the
2554 terminal coding system. The new option `glyphless-char-display-control'
2555 specifies how to display them: as a hexadecimal code in a box, a thin
2556 1-pixel space, an empty box, etc.
2558 *** New input methods for Farsi and Bulgarian
2559 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2561 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2562 (U+2010 and U+2011).
2564 *** New Hebrew translation of the Emacs Tutorial.
2565 Type `C-u C-h t' to choose it in case your language setup doesn't
2566 automatically select it.
2568 ** An Emacs Lisp package manager is now included.
2569 This is a convenient way to download and install additional packages,
2570 from a package repository at http://elpa.gnu.org.
2572 *** M-x list-packages shows a list of packages, which can be
2573 selected for installation.
2575 *** New command `describe-package', bound to `C-h P'.
2577 *** By default, all installed packages are loaded automatically when
2578 Emacs starts up. To disable this, set `package-enable-at-startup' to
2579 nil. To specify the packages to load, customize `package-load-list'.
2581 ** Custom theme changes
2583 *** New command `M-x customize-themes', which provides a convenient
2584 interface for enabling and disabling Custom themes.
2586 *** New option `custom-theme-load-path' is the load path for themes.
2587 Emacs no longer looks for Custom themes in `load-path'. The default
2588 value of `custom-theme-load-path' says to look for themes in
2589 `custom-theme-directory', followed by a subdirectory of
2590 `data-directory' named "themes/", which contains a small selection of
2591 built-in Custom themes.
2593 *** New option `custom-safe-themes' records known-safe theme files.
2594 If a theme is not in this list, Emacs queries before loading it, and
2595 offers to save the theme to `custom-safe-themes' automatically. By
2596 default, all themes included in Emacs are treated as safe.
2598 ** Improved GTK integration
2600 *** GTK scroll-bars are now placed on the right by default.
2601 The function `set-scroll-bar-mode' can change this.
2603 *** GTK tool bars can have just text, just images or images and text.
2604 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2605 the default is taken from desktop settings.
2607 *** GTK tool bars can be placed on any edge of the frame.
2608 The frame-parameter tool-bar-position controls this. It takes the
2609 values top, left, right or bottom. The Options => Show/Hide menu has
2612 *** The default colors for selected text (the `region' face) are taken
2613 from the GTK theme when Emacs is built with GTK.
2615 *** Emacs uses GTK tooltips by default if built with GTK.
2616 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2618 ** Graphical interface changes
2620 *** On graphical displays, the mode-line no longer ends in dashes.
2621 Also, the first dash (which does not indicate anything) is just
2622 displayed as a space.
2624 *** `menu-bar-select-buffer-function' lets you choose another operation
2625 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2627 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2628 built with Xft. These fonts can be set via X resources, for example:
2629 Emacs.pane.menubar.font: Courier-12
2633 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2634 or if it receives a SIGINT signal in batch mode.
2636 *** `kill-emacs-hook' is now also run in batch mode.
2637 Third-party code which adds to `kill-emacs-hook' should check if they
2638 do the right thing in batch mode.
2640 ** Scrolling changes
2642 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2643 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2644 of buffer at first key-press (instead they move to top/bottom of buffer)
2645 when `scroll-error-top-bottom' is non-nil.
2647 *** New option `scroll-error-top-bottom' (see above).
2649 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2650 scroll a line instead of full screen.
2652 *** New property `scroll-command' should be set on a command's symbol to
2653 define it as a scroll command affected by `scroll-preserve-screen-position'.
2655 *** If you customize `scroll-conservatively' to a value greater than 100,
2656 Emacs will never recenter point in the window when it scrolls due to
2657 cursor motion commands or commands that move point (e.f., `M-g M-g').
2658 Previously, you needed to use `most-positive-fixnum' as the value of
2659 `scroll-conservatively' to achieve the same effect.
2661 *** "Aggressive" scrolling now honors the scroll margins.
2662 If you customize `scroll-up-aggressively' or
2663 `scroll-down-aggressively' and move point off the window, Emacs now
2664 scrolls the window so as to avoid positioning point inside the scroll
2667 ** Basic SELinux support has been added.
2668 This requires Emacs to be linked with libselinux at build time.
2670 *** Emacs preserves the SELinux file context when backing up.
2671 Also, the function `copy-file' has an extra optional argument for
2672 preserving SELinux context, and the return value of `backup-buffer'
2673 now includes the SELinux context.
2675 *** New functions `file-selinux-context' and `set-file-selinux-context'
2676 get and set the SELinux context of a file.
2680 *** `delete-by-moving-to-trash' now only affects commands that specify
2681 trashing. This avoids inadvertently trashing temporary files.
2683 *** Calling `delete-file' or `delete-directory' with a prefix argument
2684 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2686 ** File- and directory-local variable changes
2688 *** You can stop directory local vars from applying to subdirectories.
2689 Add an element (subdirs . nil) to the alist portion of any variables
2690 settings to indicate that the section should not apply to
2693 *** Directory local variables can apply to some file-less buffers.
2694 Affected modes include dired, vc-dir, and log-edit. For example,
2695 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2696 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2697 `hack-dir-local-variables-non-file-buffer' to support this.
2699 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2700 Instead, use "eval: (minor-mode 1)".
2702 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2703 to `inhibit-local-variables-regexps'. As the name suggests, it now
2704 applies to ALL file local variables, not just -*- lines. The
2705 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2710 *** The `quit-window' command now restores the last buffer displayed
2711 in the quitted window.
2713 *** Resizing an Emacs frame now preserves proportional window sizes,
2714 modulo restrictions like window minimum sizes and fixed-size windows.
2716 *** The behavior of `display-buffer' is now customizable in detail.
2718 **** New option `display-buffer-base-action' specifies a list of
2719 user-determined display "actions" (functions and optional arguments
2720 for choosing the displaying window).
2722 This takes precedence over the default display action, which is
2723 specified by `display-buffer-fallback-action'.
2725 **** New option `display-buffer-alist' maps buffer name regexps to
2726 display actions, taking precedence over `display-buffer-base-action'.
2728 *** New option `window-combination-limit'.
2729 The new option `window-combination-limit' allows to return the space
2730 obtained for resizing or creating a window more reliably to the window
2731 from which such space was obtained.
2733 *** New option `window-combination-resize'.
2734 The new option `window-combination-resize' allows to split a window that
2735 otherwise cannot be split because it's too small by stealing space from
2736 other windows in the same combination. Subsequent resizing or deletion
2737 of the window will resize all windows in the same combination as well.
2739 *** New option `frame-auto-hide-function' lets you choose between
2740 iconifying or deleting a frame when burying a buffer in a dedicated
2741 frame, or quitting a window showing a buffer in a frame of its own.
2743 *** New commands `maximize-window' and `minimize-window'.
2744 These maximize and minimize the size of a window within its frame.
2746 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2747 These functions allow to navigate through the live buffers that have
2748 been shown in a specific window.
2750 ** Minibuffer changes
2752 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2753 This is handy for minibuffer-only frames, and is also used for the feature
2754 where mouse-1 pops up *Messages*"', which can now easily be changed.
2756 *** Minibuffers set `truncate-lines' to nil.
2757 If you want to change the value to something else, you could use
2758 for example `minibuffer-setup-hook'.
2760 ** `auto-mode-case-fold' is now enabled by default.
2762 ** `backup-by-copying-when-mismatch' now defaults to t.
2764 ** New basic faces `error', `warning', `success'.
2765 These are used to highlight text indicating failure, caution or
2766 successful operation.
2768 ** New option `list-colors-sort' defines the color sort order
2769 for `list-colors-display'.
2771 ** The variable `focus-follows-mouse' now always defaults to nil.
2774 * Editing Changes in Emacs 24.1
2778 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2779 `isearch-yank-line'.
2781 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2782 `isearch-yank-kill'.
2784 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2786 ** New commands `count-words-region' and `count-words'.
2788 *** M-= is bound to `count-words-region', not `count-lines-region'.
2789 The `count-words-region' command, when called interactively, reports
2790 the number of lines, words, and characters in the region. It is a
2791 superset of the old `count-lines-region', which is now an obsolete
2794 ** The command `just-one-space' (M-SPC), if given a negative argument,
2795 also deletes newlines around point.
2799 *** New option `delete-active-region'.
2800 If non-nil, [delete] and DEL delete the region if it is active and no
2801 prefix argument is given. If set to `kill', those commands kill
2804 *** New command `delete-forward-char', bound to [delete].
2805 This is meant for interactive use, and obeys `delete-active-region'.
2806 The command `delete-char' does not obey `delete-active-region'.
2808 *** `delete-backward-char' is now a Lisp function.
2809 Apart from obeying `delete-active-region', its behavior is unchanged.
2810 However, the byte compiler now warns if it is called from Lisp; Lisp
2811 callers should use delete-char with a negative argument instead.
2813 *** The option `mouse-region-delete-keys' has been deleted.
2815 ** Selection changes.
2817 The default handling of clipboard and primary selections has been
2818 changed to conform with modern X applications. In short, most
2819 commands for killing and yanking text now use the clipboard, while
2820 mouse commands use the primary selection.
2822 In the following, we provide a list of these changes, followed by a
2823 list of steps to get the old behavior back if you prefer that.
2825 *** `select-active-regions' now defaults to t.
2826 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2827 the kill ring. The selected text is put in the primary selection, if
2828 the system possesses a separate primary selection facility (e.g. X).
2830 **** `select-active-regions' also accepts a new value, `only'.
2831 This means to only set the primary selection for temporarily active
2832 regions (usually made by mouse-dragging or shift-selection);
2833 "ordinary" active regions, such as those made with C-SPC followed by
2834 point motion, do not alter the primary selection.
2836 **** `mouse-drag-copy-region' now defaults to nil.
2838 *** mouse-2 is now bound to `mouse-yank-primary'.
2839 This pastes from the primary selection, ignoring the kill-ring.
2840 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2842 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2844 *** `x-select-enable-primary' now defaults to nil.
2845 Thus, commands that kill text or copy it to the kill-ring (such as
2846 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2848 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2849 exactly equivalent to M-w, C-w, and C-y respectively.
2851 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2852 non-nil by default, as Windows does not support the primary selection
2853 between applications.
2855 *** To return to the previous behavior, do the following:
2857 **** Change `select-active-regions' to nil.
2858 **** Change `mouse-drag-copy-region' to t.
2859 **** Change `x-select-enable-primary' to t (on X only).
2860 **** Change `x-select-enable-clipboard' to nil.
2861 **** Bind `mouse-yank-at-click' to mouse-2.
2863 *** Support for X cut buffers has been removed.
2865 *** X clipboard managers are now supported.
2866 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2868 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2869 in the current rectangle. With a prefix argument, this prompts for a
2870 number to count from and for a format string.
2872 ** `redisplay-dont-pause' now defaults to t.
2873 This makes Emacs feel more responsive to editing commands that arrive
2874 at high rate, e.g. if you lean on some key, because stopping redisplay
2875 in the middle (when this variable is nil) forces more expensive
2876 updates later on, and Emacs appears to be unable to keep up.
2878 ** The behavior of <TAB> for active regions in Text mode has changed.
2879 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2880 when the region is active causes Emacs to indent all the lines in the
2881 region, aligning them with the line previous to the first line in the
2882 region (or with the left margin if there is no previous line).
2884 ** When `occur' is called with a prefix argument, matching strings are
2885 collected into the `*Occur*' buffer without line numbers. If there
2886 are parenthesized subexpressions in the specified regexp, `occur'
2887 reads replacement text that may contain \\& and \\N whose convention
2888 follows `replace-match'.
2891 * Changes in Specialized Modes and Packages in Emacs 24.1
2893 ** Archive Mode has basic support for browsing and updating 7z archives.
2897 *** BibTeX mode now supports biblatex.
2898 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2899 `bibtex-entry-field-alist' is now an obsolete alias for
2900 `bibtex-BibTeX-entry-alist'.
2902 *** New command `bibtex-search-entries', bound to C-c C-a.
2904 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2906 *** New variable `bibtex-search-entry-globally'.
2910 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2912 *** The default browser used by the package is now the "xdg-open" program,
2913 on platforms that support it. This calls your desktop's preferred browser.
2917 *** Support for musical notes.
2919 *** Support for logarithmic units.
2921 *** No longer uses the tex prefix for TeX specific unit names when
2922 using TeX or LaTeX mode.
2924 *** New option to highlight selections using faces.
2926 *** `calc-histogram' has the option of using a vector to determine the bins.
2928 *** New "O" option prefix.
2930 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2932 ** Calendar, Diary, and Appt
2934 *** Diary entries can contain non-printing "comments".
2935 See the variable `diary-comment-start'.
2937 *** Appointments can specify their individual warning times.
2938 See the variable `appt-warning-time-regexp'.
2940 *** The function specified by `appt-disp-window-function' may be passed
2941 lists of arguments if multiple appointments are due at similar times.
2942 If you are using a custom function for this, you should update it.
2944 *** New function `diary-hebrew-birthday'.
2946 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2947 may no longer be nil, but must all be strings.
2949 *** The obsolete (since Emacs 22.1) method of enabling the appt
2950 package by adding `appt-make-list' to `diary-hook' has been removed.
2951 Use `appt-activate' instead.
2953 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2954 appt-issue-message (use the function appt-activate)
2955 appt-visible/appt-msg-window (use the variable appt-display-format)
2957 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2958 view-diary-entries, list-diary-entries, show-all-diary-entries
2962 *** New feature to "guess" the style in an existing buffer.
2963 The main entry point is M-x c-guess.
2965 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2967 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2968 Thus C-M-a will, by default, go to the beginning of the immediate function,
2971 *** "Macros with semicolons" can be registered for correct indentation.
2972 Where such a macro ends a line (no semicolon) the next statement is no longer
2973 parsed as a statement continuation.
2975 ** Comint and modes derived from it use the standard completion code.
2979 *** Compilation mode can be used without Font Lock mode.
2980 `compilation-parse-errors-function' is now obsolete.
2982 *** New variable `compilation-filter-start', which is bound while
2983 `compilation-filter-hook' runs. It records the start position of the
2984 text inserted by `compilation-filter'.
2986 *** `compilation-error-screen-columns' and `compilation-first-column'
2987 are obeyed in the editing buffer. So programming language modes can
2988 set them, whereas previously only the value in the *Compilation*
2993 *** Customize buffers now contain a search field.
2994 The search is performed using `customize-apropos'.
2995 To turn off the search field, set `custom-search-field' to nil.
2997 *** Options in customize group buffers start out hidden if not customized.
2998 Use the arrow to the left of the option name to toggle visibility.
3000 *** custom-buffer-sort-alphabetically now defaults to t.
3002 *** The color widget now has a "Choose" button, which allows you to
3003 choose a color via `list-colors-display'.
3007 *** It is now possible to access buses other than the default system
3010 *** The `dbus-register-method' and `dbus-register-property' functions
3011 optionally do not register names.
3013 *** The new function `dbus-register-service' registers a known service
3014 name on a D-Bus without also registering a property or a method.
3018 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3019 if called with a prefix argument, read a file name from the minibuffer
3020 instead of using the current buffer.
3022 *** The "dired local variables" feature of Dired-x is obsolete.
3023 The standard directory local variables feature replaces it.
3027 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3028 controlling attempts to autojoin a channel.
3030 *** New variable `erc-coding-system-precedence': If we use `undecided'
3031 as the server coding system, this variable will then be consulted.
3032 The default is to decode strings that can be decoded as utf-8 as
3033 utf-8, and do the normal `undecided' decoding for the rest.
3037 *** The default value of `eshell-directory-name' has changed
3038 to be an "eshell" directory in `user-emacs-directory'.
3039 The old "~/.eshell/" directory is still used if it exists, though.
3043 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3044 It now supports multithread non-stop debugging and simultaneous
3045 debugging of several threads.
3049 *** RET (`image-toggle-animation') toggles animation, if applicable.
3050 Animation plays once, unless the option `image-animate-loop' is non-nil.
3054 *** New command M-x info-display-manual displays a named Info manual.
3055 If that manual is already visited in some Info buffer, it displays
3056 that buffer. (This is handy if you have many manuals in many *info*
3057 buffers, and don't remember the name of the buffer visiting the manual
3058 you want to consult.) Otherwise, it loads and displays the manual.
3060 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3061 This is for compatibility with the stand-alone Info reader program,
3062 and also because `Info-edit' is a rarely used command that is disabled
3065 ** Mail mode changes (not Message mode)
3067 *** New command M-x mail-add-attachment for adding MIME attachments
3069 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3070 (Its name is misleading, since it has nothing to do with MIME
3071 attachments.) The old name is now an obsolete alias to the new name.
3073 ** MH-E has been updated to MH-E version 8.3.1.
3074 See MH-E-NEWS for details.
3076 ** Modula-2 mode provides auto-indentation.
3078 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3080 ** nXML mode no longer binds C-RET to `nxml-complete'.
3081 Completion is now performed via `completion-at-point', bound to C-M-i
3082 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3083 default), this performs tag completion.
3085 ** Org mode has been updated to version 7.8.09.
3086 See ORG-NEWS for details.
3088 ** Prolog mode has been completely revamped, with lots of additional
3089 functionality such as more intelligent indentation, electricity,
3090 support for more variants, including Mercury, and a lot more.
3094 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3095 in the Rmail incoming message.
3097 *** The variable `rmail-message-filter' no longer has any effect.
3098 This change was made in Emacs 23.1 but was not advertised at the time.
3099 Try using `rmail-show-message-hook' instead.
3103 *** M-x shell prompts for the shell path name if the default directory
3104 is a remote file name and neither the environment variable $ESHELL nor
3105 the variable `explicit-shell-file-name' is set.
3107 *** TAB is now bound to the standard `completion-at-point' command,
3108 which now implements the pcomplete rules for shell command completion.
3112 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3113 if the mail server supports them. This uses either built-in GnuTLS
3114 support, or the starttls.el library. Customize `smtpmail-stream-type'
3117 *** The variable `smtpmail-auth-credentials' has been removed.
3118 By default, the information is now stored in the file ~/.authinfo.
3119 This was the default value of smtpmail-auth-credentials. If you had
3120 customized smtpmail-auth-credentials to a list of user names and
3121 passwords, those settings are not used. During your first connection
3122 to the smtp server, Emacs will prompt for the user name and password,
3123 and offer to save them to ~/.authinfo. Or you can manually copy the
3124 credentials to ~/.authinfo. For example, if you had
3126 (setq smtpmail-auth-credentials
3127 '(("mail.example.org" 25 "jim" "s!cret")))
3129 then the equivalent line in ~/.authinfo would be
3131 machine mail.example.org port 25 login jim password s!cret
3133 See the auth-source manual for more information, e.g. on encrypting
3134 the credentials file.
3136 *** The variable `smtpmail-starttls-credentials' has been removed.
3137 If you had that set, you need to put
3139 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3141 in your ~/.authinfo file instead.
3143 *** SMTPmail defaults to using the address in the From: header as the
3144 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3145 to the address you wish to use instead.
3149 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3150 and `sql-oracle-scan-on'.
3152 *** New options controlling prompting for login parameters.
3153 Each supported product has a custom variable `sql-*-login-params',
3154 which is a list of the parameters to be prompted for before a
3155 connection is established.
3157 *** The command `sql-product-interactive' now takes a prefix argument,
3158 which causes it to prompt for an SQL product.
3160 *** Product-specific SQL interactive commands now take prefix arguments.
3161 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3162 given a prefix argument, prompt for a name for the SQL interactive
3163 buffer. This reduces the need for calling `sql-rename-buffer'.
3165 *** SQL interactive modes suppress command continuation prompts, and
3166 replace tabs with spaces. The first change impacts multiple line SQL
3167 statements entered with C-j between each line, statements yanked into
3168 the buffer and statements sent with `sql-send-*' functions. The
3169 second prevents the MySQL and Postgres interpreters from listing
3170 object name completions when sent text via `sql-send-*' functions.
3172 *** New command `sql-connect' starts a predefined SQLi session,
3173 using the login parameters from `sql-connection-alist'.
3175 *** New "Save Connection" menu item in SQLi buffers.
3176 This gathers the login params specified for the SQLi session, if it
3177 was not started by a connection, and saves them as a new connection.
3179 *** New commands for listing database objects and details:
3180 sql-list-all and sql-list-table.
3182 *** An API for manipulating SQL product definitions has been added.
3186 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3190 *** New inline access method "ksu" (kerberized su).
3192 *** The following access methods are discontinued: "ssh1_old",
3193 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3195 *** The user option `remote-file-name-inhibit-cache' controls whether
3196 remote file attributes are cached for better performance.
3198 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3199 default value to "".
3201 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3202 for remote machines which support SELinux.
3204 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3205 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3206 the degree of parallelism.
3208 ** VC and related modes
3210 *** Support for pulling on distributed version control systems.
3211 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3212 supported (currently with Bzr, Git, and Mercurial), to update the
3213 current branch and working tree. A prefix argument means to prompt
3214 the user for specifics, e.g. a pull location.
3216 *** `vc-update' is now an alias for `vc-pull'.
3218 *** Support for merging on distributed version control systems.
3219 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3220 is supported (currently with Bzr, Git, and Mercurial), to merge
3221 changes from another branch into the current one. It prompts for
3222 specifics, e.g. a merge source.
3224 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3225 shows a diff while querying the user. It defaults to t.
3227 *** Log entries in some Log View buffers can be toggled to display a
3228 longer description by typing RET (log-view-toggle-entry-display).
3229 This is currently supported for Bzr, Git, and Mercurial (to support
3230 another backend, define a `log-view-expanded-log-entry-function').
3231 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3232 use this to display the full log entry for the revision at point.
3234 *** New command `vc-ediff' allows visual comparison of two revisions
3235 of a file similar to `vc-diff', but using ediff backend.
3237 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3238 this was not advertised at the time.
3240 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3241 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3242 this was not advertised at the time.
3248 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3250 *** partial-completion-mode (complete.el) is obsolete.
3251 You can get a comparable behavior with:
3252 (setq completion-styles '(partial-completion initials))
3253 (setq completion-pcm-complete-word-inserts-delimiters t)
3255 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3257 *** pgg is obsolete (use EasyPG instead).
3259 *** sregex.el is obsolete, since rx.el is a strict superset.
3261 *** s-region.el and pc-select.el are obsolete.
3262 They are superseded by shift-select-mode, enabled by default since 23.1.
3264 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3268 *** The Landmark game is now invoked with `landmark', not `lm'.
3269 Its functions and variables have been similarly renamed.
3271 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3272 (This interfered with cua-mode.)
3274 *** f90.el has some support for Fortran 2008 syntax.
3276 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3278 *** New command `nato-region' converts text to NATO phonetic alphabet.
3281 * New Modes and Packages in Emacs 24.1
3283 ** Occur Edit mode applies edits made in *Occur* buffers to the
3284 original buffers. It is bound to "e" in Occur mode.
3286 ** New global minor mode electric-pair-mode.
3287 When enabled, typing an open parenthesis automatically inserts the
3288 matching closing one.
3290 ** New global minor mode electric-indent-mode.
3291 When enabled, typing certain characters triggers reindentation.
3292 Major modes wishing to use this can set electric-indent-chars or
3293 electric-indent-functions.
3295 ** New global minor mode electric-layout-mode.
3296 When enabled, typing certain characters automatically inserts newlines.
3297 Major modes wishing to use this can set electric-layout-rules.
3299 ** tabulated-list.el provides a generic major mode for tabulated data,
3300 from which other modes can be derived.
3302 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3304 ** secrets.el is an implementation of the Secret Service API, an
3305 interface to password managers like GNOME Keyring or KDE Wallet. The
3306 Secret Service API requires D-Bus for communication. The command
3307 `secrets-show-secrets' offers a buffer with a visualization of the
3310 ** notifications.el provides an implementation of the Desktop
3311 Notifications API. It requires D-Bus for communication.
3313 ** soap-client.el supports access to SOAP web services from Emacs.
3314 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3316 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3318 ** New emacs-lock.el package.
3319 The previous version has been moved to obsolete/old-emacs-lock.el.
3320 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3321 against exiting Emacs and killing the buffer can be set separately.
3322 The mechanism for automatically turning off protection for buffers
3323 with dead inferior processes has been generalized.
3326 * Incompatible Lisp Changes in Emacs 24.1
3328 ** Passing a nil argument to a minor mode function call now ENABLES
3329 the minor mode unconditionally. This is so that you can write e.g.
3331 (add-hook 'text-mode-hook 'foo-mode)
3333 to enable foo-mode in Text mode buffers, removing the need for
3334 `turn-on-foo-mode' style functions. This affects all mode commands
3335 defined by `define-minor-mode'. If called interactively, the mode
3336 command still toggles the minor mode.
3338 ** The return value of `backup-buffer' has changed.
3339 It is now a list of three elements, where the second element is a list
3340 describing the original file's SELinux context. If Emacs or the
3341 system lacks SELinux support, the context list is (nil nil nil nil).
3342 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3344 ** `char-direction-table' and the `char-direction' function were deleted.
3345 They were buggy and inferior to the new support of bidirectional
3346 editing introduced in Emacs 24. If you need the bidirectional
3347 properties of a character, use `get-char-code-property' with the last
3348 argument `bidi-class'.
3350 ** `copy-directory' now copies the source directory as a subdirectory
3351 of the target directory, if the latter is an existing directory. The
3352 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3353 the contents directly into a pre-existing target directory.
3355 ** For mouse click input events in the text area, the Y pixel
3356 coordinate in the POSITION list now counts from the top of the text
3357 area, excluding any header line. Previously, it counted from the top
3360 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3361 been further reduced. Now a backquote not followed by a space is
3362 always treated as a "new-style" backquote. Please remove all
3363 "old-style" backquotes from your code. If your code uses backquotes
3364 as documented in the Elisp manual, and compiles without warning, then
3365 you have nothing to do in this regard. Code not following the
3366 appropriate conventions may fail to compile.
3368 The most common cause of trouble seems to be an old-style backquote
3369 followed by a newline. Another cause of trouble is vector notation
3370 for key sequence notation: instead of [(control ,)] and [(control ')],
3371 you should write [(control ?,)] and [(control ?')], which will work in
3374 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3375 was not advertised at the time. The function `custom-initialize-delay'
3376 replaced all known uses.
3378 ** `view-buffer' now treats special mode-class in the same way that
3379 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3380 major mode is special).
3382 ** Menu and tool bar changes
3384 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3385 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3386 With these alist entries omitted, `make-frame' checks the value of the
3387 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3388 a menu-bar or tool-bar, respectively. If the alist entries are added,
3389 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3391 *** The menu bar bindings's caches are not used any more.
3392 Use (where-is-internal <def> nil t) instead.
3394 ** Regions created by mouse dragging are now normal active regions,
3395 similar to those created by shift-selection (see Selection changes
3396 above). In previous Emacs versions, these regions were delineated by
3397 `mouse-drag-overlay'; that variable has been removed.
3399 ** The fourth argument of `filter-buffer-substring' has been removed.
3400 If you want to remove text properties from the final result, simply
3401 pass the result through substring-no-properties.
3403 ** cl.el no longer provides `cl-19'.
3405 ** The following obsolete functions and aliases have been removed
3406 (the appropriate new function is given in parentheses; "not needed"
3407 means you can just remove all calls to the function in question):
3409 *** `comint-kill-output' (`comint-delete-output')
3410 *** `decompose-composite-char' (`char-to-string')
3411 *** `outline-visible' (`outline-invisible-p')
3412 *** `internal-find-face' (`facep')
3413 *** `internal-get-face' (`facep and check-face')
3414 *** `frame-update-faces' (not needed)
3415 *** `frame-update-face-colors' (`frame-set-background-mode')
3416 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3417 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3418 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3419 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3420 *** `x-make-font-unbold' (`make-face-unbold')
3421 *** `x-make-font-unitalic' (`make-face-unitalic')
3422 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3423 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3424 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3425 *** `char-bytes' (== 1)
3426 *** `isearch-return-char' (`isearch-printing-char')
3427 *** `make-local-hook' (not needed)
3428 *** `set-screen-height' (`set-frame-height')
3429 *** `set-screen-width' (`set-frame-width')
3431 ** The following obsolete variables and varaliases have been removed
3432 (the appropriate new variable is given in parentheses):
3434 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3435 *** `vc-header-alist' (`vc-BACKEND-header')
3436 *** `directory-sep-char' (== ?/)
3437 *** `font-lock-defaults-alist' (`font-lock-defaults')
3438 *** `e' (`float-e').
3440 ** The following obsolete files were removed:
3441 sc.el, x-menu.el, rnews.el, rnewspost.el
3443 ** The format of the finder-inf.el file has changed, since the Finder
3444 mechanism is now based on the package system. The variable
3445 `finder-package-info' is replaced by `package--builtins' and
3446 `finder-keywords-hash'.
3448 ** When generating autoloads, `update-directory-autoloads' no longer
3449 assumes every inspected file is in your `load-path'. It instead
3450 generates relative names according to the current `load-path'.
3453 * Lisp Changes in Emacs 24.1
3455 ** Code can now use lexical scoping by default instead of dynamic scoping.
3456 The `lexical-binding' variable enables lexical scoping for local
3457 variables. It is typically set via a file-local variable in the first
3458 line of the file, in which case it applies to all the code in that
3461 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3462 binding instead of the old dynamic binding mode.
3464 *** Lexically scoped interpreted functions are represented with a new form
3465 of function value which looks like (closure ENV ARGS &rest BODY).
3467 *** New macro `letrec' to define recursive local functions.
3469 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3470 So do `defcustom' and other forms that call `defvar' as a subroutine.
3472 *** New function `special-variable-p' to check whether a variable is
3473 declared as dynamically bound.
3475 *** The form ((lambda ...) ...) is deprecated.
3477 ** An Emacs Lisp testing tool is now included.
3478 Emacs Lisp developers can use this tool to write automated tests for
3479 their code. See the ERT info manual for details.
3481 ** Changes for bidirectional display and editing
3483 *** New function `current-bidi-paragraph-direction'.
3484 This returns the base direction of the paragraph at point.
3486 *** New function `bidi-string-mark-left-to-right'.
3487 Given a string containing characters from right-to-left scripts, this
3488 function returns another string which can be safely inserted into a
3489 buffer, such that any following text will be always displayed to the
3490 right of that string. (This works by appending an invisible Unicode
3491 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3493 This is useful when the buffer has overall left-to-right paragraph
3494 direction and you need to insert a string whose contents are not known
3495 in advance, without disrupting the layout of the line.
3499 *** Window tree functions are accessible in Elisp.
3500 Functions are provided to return the parent, siblings or child windows
3501 of any window including internal windows (windows not associated with a
3502 buffer) in the window tree.
3504 **** New function `window-valid-p' gives non-nil for live and internal
3507 **** Window manipulation can deal with internal windows.
3508 Many window handling functions like `split-window', `delete-window', or
3509 `delete-other-windows' as well as the window resizing functions can now
3510 act on any window including internal ones.
3512 *** window-total-height/-width vs window-body-height/-width.
3513 The function `window-height' has been renamed to `window-total-height'
3514 and `window-width' has been renamed to `window-body-width'. The old
3515 names are provided as aliases. Two new functions `window-total-width'
3516 and `window-body-height' are provided.
3518 *** Window parameters specific to window handling functions.
3519 For each window you can specify a parameter to override the default
3520 behavior of a number of functions like `split-window', `delete-window'
3521 and `delete-other-windows'. The variable `ignore-window-parameters'
3522 allows to ignore processing such parameters.
3524 *** New semantics of third argument of `split-window'.
3525 The third argument of `split-window' has been renamed to SIDE and can be
3526 set to any of the values 'below, 'right, 'above, or 'left to make the
3527 new window appear on the corresponding side of the window that shall be
3528 split. Any other value of SIDE will cause `split-window' to split the
3529 window into two side-by-side windows as before.
3531 *** Window resizing functions.
3532 A new standard function for resizing windows called `window-resize' has
3533 been introduced. This and all other functions for resizing windows no
3534 longer delete any windows when they become too small.
3536 *** Deleting the selected window now selects the most recently selected
3537 live window on that frame instead.
3539 *** `adjust-window-trailing-edge' adjustments.
3540 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3541 is able to resize other windows if a window adjacent to the trailing
3542 edge cannot be shrunk any more. This makes its behavior more similar to
3543 that of Emacs 21 without compromising, however, its inability to delete
3544 windows which was introduced in Emacs 22.
3546 *** Window-local buffer lists.
3547 Windows now have local buffer lists. This means that removing a buffer
3548 from display in a window will preferably show the buffer previously
3549 shown in that window with its previous window-start and window-point
3550 positions. This also means that the same buffer may be automatically
3551 shown twice even if it already appears in another window.
3553 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3554 which if non-nil requires the buffer to be displayed in the currently
3555 selected window, signaling an error otherwise. If nil, another window
3556 can be used, e.g. if the selected one is strongly dedicated.
3558 *** `split-window-vertically' and `split-window-horizontally' renamed
3559 to `split-window-below' and `split-window-right' respectively.
3560 The old names are kept as aliases.
3564 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3565 named ACTION, and takes a display action of the same form as
3566 `display-buffer-base-action' (see Changes, above). A non-nil,
3567 non-list value is treated specially, as the old meaning.
3569 **** New variable `display-buffer-overriding-action'.
3571 **** The procedure of `display-buffer' etc. to choose a window is
3572 determined by combining `display-buffer-overriding-action',
3573 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3574 and `display-buffer-fallback-action'. The second and fourth of these
3575 are user-customizable variables.
3577 See the docstring of `display-buffer' for details.
3579 *** New functions `window-state-get' and `window-state-put'.
3580 These functions allow to save and restore the state of an arbitrary
3581 frame or window as an Elisp object.
3585 *** New variable `completion-extra-properties' used to specify extra
3586 properties of the current completion:
3587 - :annotate-function, same as the old completion-annotate-function.
3588 - :exit-function, function to call after completion took place.
3590 *** Functions on `completion-at-point-functions' can return any of the
3591 properties valid for `completion-extra-properties'.
3593 *** `completion-annotate-function' is obsolete.
3595 *** New `metadata' method for completion tables. The metadata thus returned
3596 can specify various details of the data returned by `all-completions':
3597 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3598 used to select a style in completion-category-overrides.
3599 - `annotation-function' to add annotations in *Completions*.
3600 - `display-sort-function' to specify how to sort entries in *Completions*.
3601 - `cycle-sort-function' to specify how to sort entries when cycling.
3603 *** `minibuffer-local-filename-must-match-map' is not used any more.
3604 Instead, the bindings in `minibuffer-local-filename-completion-map'
3605 are combined with `minibuffer-local-must-match-map'.
3607 *** New variable `completing-read-function' allows overriding the
3608 behavior of `completing-read'.
3610 ** `glyphless-char-display' can now distinguish between graphical and
3611 text terminal display, via a char-table entry that is a cons cell.
3613 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3614 Instead, the offending function is removed.
3618 *** New function `run-hook-wrapped' for running an abnormal hook by
3619 passing the hook functions as arguments to a "wrapping" function.
3620 Like `run-hook-with-args-until-success', it stops at the first
3621 non-nil return value.
3623 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3624 set of "wrapping" filters, similar to around advice.
3625 (A version of this macro was actually added in Emacs 23.2 but was not
3626 advertised at the time.)
3630 *** New macro `condition-case-unless-debug' (this was actually added in
3631 Emacs 23.1 as condition-case-no-debug, but not advertised)
3633 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3635 *** Variable `stack-trace-on-error' removed.
3637 *** The debugger can now "continue" from an error, which means it will
3638 jump to the error handler as if the debugger had not been invoked
3639 instead of jumping all the way to the top-level.
3641 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3642 This can be useful when `inhibit-quit' is set.
3644 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3645 named Emacs server instances.
3647 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3648 to redirect STDOUT to a file.
3650 ** The function `format-time-string' now supports the %N directive,
3651 for higher-resolution time stamps.
3653 ** New input reading functions
3655 *** New function `read-char-choice' reads a restricted set of
3656 characters, discarding any inputs not inside the set.
3658 *** The command `read-color' now requires a match for a color name
3659 or RGB triplet, instead of signaling an error if the user provides
3662 **** `facemenu-read-color' is now an alias for `read-color'.
3664 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3665 The variable is now used to load all kind of supported dynamic libraries,
3666 not just image libraries. The previous name is still available as an
3669 ** Syntax parsing changes
3671 *** New variable `syntax-propertize-function'.
3672 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3673 This allows syntax-table properties to be set independently from font-lock:
3674 just call syntax-propertize to make sure the text is propertized.
3675 Together with this new variable come a new hook
3676 syntax-propertize-extend-region-functions, as well as two helper functions:
3677 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3678 as-is; and syntax-propertize-rules which provides a new way to specify
3681 *** Syntax tables support a new "comment style c" additionally to style b.
3683 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3685 ** frame-local variables cannot be let-bound any more.
3687 ** Major and minor mode changes
3689 *** `set-auto-mode' now respects mode: local variables at the end of files,
3690 as well as those in the -*- line.
3692 *** `prog-mode' is a new major mode from which programming modes
3695 **** `prog-mode-hook' can be used to enable features for programming
3696 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3697 on-the-fly spell checking for comments and strings.
3699 *** New hook `change-major-mode-after-body-hook', run by
3700 `run-mode-hooks' just before any other mode hooks.
3702 *** Enabled globalized minor modes can be disabled in specific major modes.
3703 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3704 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3706 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3708 ** File-handling changes
3710 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3711 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3712 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3713 argument is supplied (see Trash changes, above).
3715 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3717 ** Tool-bars can display separators.
3718 Tool-bar separators are handled like menu separators in menu-bar maps,
3719 i.e. via menu entries of the form `(menu-item "--")'.
3723 *** Animated images support (currently animated gifs only).
3725 **** `image-animated-p' returns non-nil if an image can be animated.
3727 **** `image-animate' animates a supplied image spec.
3729 **** `image-animate-timer' returns the timer object for an image that
3732 *** `image-extension-data' has been renamed to `image-metadata'.
3733 The old name is an obsolete alias to the new one.
3735 *** Image mode can view any image type that ImageMagick supports.
3736 This requires Emacs to be built with ImageMagick support.
3738 **** New function `imagemagick-types', defined if ImageMagick support
3739 is enabled, returns a list of image file extensions that your
3740 ImageMagick installation supports.
3742 **** New function `imagemagick-register-types' enables ImageMagick
3743 image types in Image mode and in `create-image' and other helper
3746 **** New option `imagemagick-types-inhibit' excludes certain
3747 ImageMagick image types from `imagemagick-register-types'.
3749 **** With ImageMagick support, there are extra Image mode commands to
3750 resize and rotate images: `image-transform-fit-to-height',
3751 `image-transform-fit-to-width', `image-transform-set-rotation', and
3752 `image-transform-set-scale'.
3754 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3755 passes it to the mail user agent function. This argument specifies an
3756 action for returning to the caller after finishing with the mail. For
3757 example, this is used by Rmail to optionally delete a mail window.
3759 ** XML and HTML parsing
3760 If Emacs is compiled with libxml2 support, there are two new
3761 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3762 and `libxml-parse-xml-region' (which parses XML). Both return an
3763 Emacs Lisp parse tree.
3765 ** Networking and encryption changes
3767 *** `open-network-stream' can now be used to open an encrypted stream.
3768 It now accepts an optional `:type' parameter for initiating a TLS
3769 connection, directly or via STARTTLS. To do STARTTLS, additional
3770 parameters (`:end-of-command', `:success', `:capabilities-command')
3771 must also be supplied.
3773 *** New library gnutls.el.
3774 The new function `gnutls-available-p' returns non-nil if Emacs is
3775 built with GnuTLS support. The main entry points are
3776 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3777 these functions through `open-network-stream', because that can
3778 upgrade connections through STARTTLS opportunistically or use plain
3779 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3782 *** New primitive `secure-hash' that supports many secure hash algorithms:
3783 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3784 sha1.el has been removed. The `sha1' feature is provided by default.
3788 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3790 ** Progress reporters can now "spin".
3791 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3792 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3793 time you call `progress-reporter-update' on that progress reporter,
3794 with a nil or omitted VALUE argument, the reporter message is
3795 displayed with a "spinning bar".
3797 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3798 being reverted, even if the buffer has a local `revert-buffer-function'.
3800 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3801 If delayed-warnings-list is non-nil, the command loop calls
3802 `delayed-warnings-hook' after `post-command-hook'. At present, this
3803 is only used by Emacs on some platforms to display warnings during
3804 startup, which might otherwise not be noticed. This uses the
3805 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3807 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3809 ** New function `make-composed-keymap' that constructs a new keymap
3810 from multiple input maps. You can use this to make a keymap that
3811 inherits from multiple maps, eg:
3812 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3814 ** New function `string-prefix-p'.
3815 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3817 ** New reader macro ## that stands for the empty symbol.
3818 This means that the empty symbol can now be read back. Also, #: by itself
3819 (when not immediately followed by a possible symbol character) stands for
3820 an empty uninterned symbol.
3822 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3824 ** The following functions and variables are obsolete:
3826 *** `tooltip-use-echo-area' is obsolete.
3827 Rather than setting this to t, disable Tooltip mode instead.
3829 *** buffer-substring-filters is obsolete.
3830 Use `filter-buffer-substring-functions' instead.
3832 *** `byte-compile-disable-print-circle' is obsolete.
3834 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3835 Use `post-command-hook' instead.
3837 *** `font-lock-maximum-size' is obsolete.
3840 * Changes in Emacs 24.1 on Non-Free Operating Systems
3842 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3843 and also when HOME is set to C:\ by default.
3845 ** New configure.bat options
3847 *** --enable-checking builds Emacs with extra runtime checks.
3849 *** --distfiles specifies files to be included in binary distribution.
3851 *** --without-gnutls disables automatic GnuTLS detection.
3853 *** --lib for general library linkage, works with the USER_LIBS build variable.
3855 ** New make target `dist' to create binary distribution for MS Windows.
3857 ** The Lisp function `w32-default-color-map' is now obsolete.
3858 (It is only used internally in the Emacs C code.)
3860 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3861 reappear on mouse-over. (Requires OS X 10.6 or later.)
3863 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3864 other platforms, rather than inserting its contents into the buffer.
3867 ----------------------------------------------------------------------
3868 This file is part of GNU Emacs.
3870 GNU Emacs is free software: you can redistribute it and/or modify
3871 it under the terms of the GNU General Public License as published by
3872 the Free Software Foundation, either version 3 of the License, or
3873 (at your option) any later version.
3875 GNU Emacs is distributed in the hope that it will be useful,
3876 but WITHOUT ANY WARRANTY; without even the implied warranty of
3877 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3878 GNU General Public License for more details.
3880 You should have received a copy of the GNU General Public License
3881 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3886 paragraph-separate: "[
\f]*$"