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 updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can now be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can now be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
38 ** The configure option `--without-compress-info' has been generalized,
39 and renamed to `--without-compress-install'. It now prevents compression
40 of _any_ files during installation.
43 ** The configure option `--with-crt-dir' has been removed.
44 It is no longer needed, as the crt*.o files are no longer linked
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` will always invoke `tmm-menubar', even if
111 `tty-menu-open-use-tmm' is nil.)
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as just they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
162 *** The command `describe-function' has been extended for EIEIO.
163 Running it on constructors will show a full description of the
164 generated class. For generic functions, it will show all
165 implementations together with links to the source. The old commands
166 `describe-class', `describe-constructor' and `describe-generic' were
170 *** The function `quail-help' is no longer an interactive command.
171 Use `C-h C-\' (`describe-input-method') instead.
176 *** ImageMagick images now support the :max-width and :max-height keywords.
179 *** When using `create-image' with image data, you can pass a :format
180 attribute (via the property-list argument) in order to help
181 ImageMagick detect the image type. The value should be a MIME
182 content-type that is found in the new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
190 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
191 `frame-configuration-to-register'. It offers similar functionality,
192 plus enhancements like the ability to restore deleted frames. The
193 command `frame-configuration-to-register' still exists, but is unbound.
196 *** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 *** `split-window' is now a non-interactive function, not a command.
201 As a command, it was a special case of `C-x 2' (`split-window-below'),
202 and as such superfluous. After being reimplemented in Lisp, its
203 interactive form was mistakenly retained.
206 *** New option `scroll-bar-adjust-thumb-portion'.
207 Available only on X, this option allows to control over-scrolling
208 using the scroll bar (i.e. dragging the thumb down even when the end
209 of the buffer is visible).
211 ** Lisp evaluation changes
213 *** `eval-defun' on an already defined defcustom calls the :set function,
216 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
217 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
218 a list with no limit on its length and level (by using nil values of
219 `print-length' and `print-level'), and inserts additional formats for
220 integers (octal, hexadecimal, and character).
223 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
226 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
227 because it affects caching of paragraph scanning results as well.
228 Also, it is now enabled by default.
231 ** The option `set-mark-default-inactive' has been deleted.
232 This unfinished feature was introduced by accident in Emacs 23.1;
233 simply disabling Transient Mark mode does the same thing.
235 ** The default value of `comment-use-global-state' is now t,
236 and this variable has been marked obsolete.
239 ** `emacs-bzr-version' has been renamed to `emacs-repository-version'.
243 *** `read-regexp-defaults-function' defines a function to read regexps,
244 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp', etc.
245 You can customize this to specify a function that provides a default
246 value from the regexp last history element, or from the symbol found
250 *** `load-prefer-newer', affects how the `load' function chooses the
251 file to load. If this is non-nil, then when both .el and .elc
252 versions of a file exist, and the caller did not explicitly specify
253 which one to load, then the newer file is loaded. The default, nil,
254 means to always load the .elc file.
257 * Editing Changes in Emacs 24.4
259 ** Indentation changes
262 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
263 When invoked without a prefix argument, it now activates a transient
264 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
265 the text indentation in the region. Typing any other key resumes
266 normal editing behavior.
268 *** `electric-indent-mode' is enabled by default.
270 *** `tab-stop-list' is now implicitly extended to infinity by repeating
271 the last step. Its default value is changed to nil, which means a tab
272 stop every `tab-width' columns.
276 *** New command `cycle-spacing' cycles between spacing conventions:
277 having just one space, no spaces, or reverting to the original
278 spacing. Like `just-one-space', it can handle or ignore newlines and
279 leave different number of spaces.
281 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
282 a 1-letter word, which is an error according to Polish and
283 Czech typography rules. To globally enable this feature, evaluate:
285 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
288 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
290 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
291 Most commands are still unaware of it, but kill/yank do work on the rectangle.
294 ** New option `visual-order-cursor-movement'.
295 If this is non-nil, cursor motion with arrow keys will follow the
296 visual order of characters on the screen: <left> always moves to the
297 left, <right> always moves to the right, disregarding the surrounding
298 bidirectional context.
302 *** All register commands can now show help with preview.
305 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
308 *** New command `C-x r f' (`frameset-to-register').
309 See Changes in Emacs 24.4, above.
311 ** New command `delete-duplicate-lines'.
312 When its arg ADJACENT is non-nil (when called interactively with C-u
313 C-u) it works like the utility `uniq'. Otherwise by default it
314 deletes duplicate lines everywhere in the region without regard to
315 adjacency. When its arg KEEP-BLANKS is non-nil (when called
316 interactively with C-u C-u C-u), duplicate blank lines are preserved.
319 * Changes in Specialized Modes and Packages in Emacs 24.4
321 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
323 ~/.emacs.d/timelog replaces ~/.timelog
324 ~/.emacs.d/vip replaces ~/.vip
325 ~/.emacs.d/viper replaces ~/.viper
326 ~/.emacs.d/ido.last replaces ~/.ido.last
327 ~/.emacs.d/kkcrc replaces ~/.kkcrc
328 ~/.emacs.d/quickurls replaces ~/.quickurls
329 ~/.emacs.d/idlwave replaces ~/.idlwave
330 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
331 ~/.emacs.d/places replaces ~/.emacs-places
332 ~/.emacs.d/shadows replaces ~/.shadows
333 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
334 ~/.emacs.d/strokes replaces ~/.strokes
335 ~/.emacs.d/notes replaces ~/.notes
336 ~/.emacs.d/type-break replaces ~/.type-break
337 Also the following files used by the now obsolete otodo-mode.el:
338 ~/.emacs.d/todo-do replaces ~/.todo-do
339 ~/.emacs.d/todo-done replaces ~/.todo-done
340 ~/.emacs.d/todo-top replaces ~/.todo-top
342 ** Backtrace and debugger
344 *** The Lisp debugger's `e' command now includes the lexical environment
345 when evaluating the code in the context at point. Hence, it now lets
346 you access lexical variables.
349 *** New command `v' (`debugger-toggle-locals') displays local vars.
351 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
352 code run via JIT Lock.
357 *** Battery information via the BSD `apm' utility is now supported.
361 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
363 ** Calendar and Diary
366 *** New faces `calendar-weekday-header', `calendar-weekend-header',
367 and `calendar-month-header'.
370 *** New option `calendar-day-header-array'.
373 *** New variable `diary-from-outlook-function', used by the command
374 `diary-from-outlook'.
377 *** The variable `calendar-font-lock-keywords' is obsolete.
381 *** Calc by default now uses the Gregorian calendar for all dates, and
382 uses January 1, 1 AD as its day number 1. Previously Calc used the
383 Julian calendar for dates before September 14, 1752, and it used
384 December 31, 1 BC as its day number 1; the new scheme is more
385 consistent with Calendar's calendrical system and day numbering.
387 *** The new variable `calc-gregorian-switch' lets you configure the
388 date when Calc switches from the Julian to the Gregorian calendar.
389 Nil, the default value, means to always use the Gregorian calendar.
390 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
393 *** Support for ISO 8601 dates.
399 **** The cpp-root project now supports executing a compile command.
400 It can be set through the new :compile-command slot or the
401 buffer-local variable `compile-command'.
403 **** Better selection of include directories for the 'linux' project.
404 Include directories now support out-of-tree build directories and
405 target architecture auto-detection.
409 **** Improved detection of used namespaces in current scope in C++.
411 **** Parsing of default values for variables and function arguments in C/C++.
412 They are also displayed by the summarize feature in the modeline.
414 **** Improved parsing of function pointers in C/C++.
415 This also includes parsing of function pointers as function arguments.
417 **** Parsing of C/C++ preprocessor macros which open new scope.
418 For example, this enables parsing of macros which open new namespaces.
420 **** Support for 'this' pointer in inline member functions in C++.
424 *** New macro `cl-tagbody'.
427 *** letf is now just an alias for cl-letf.
431 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
432 Hence, you can now enable it independently from `transient-mark-mode',
433 `delete-selection-mode', and `shift-select-mode'.
435 *** `cua-highlight-region-shift-only' is now obsolete.
436 You can disable `transient-mark-mode' to get the same result.
438 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
442 *** Support for completion, ElDoc, and Flycheck has been added.
444 *** The current CFEngine syntax is parsed from "cf-promises -s json".
445 There is a fallback syntax available if you don't have cf-promises or
446 if it doesn't support that option.
448 ** Delete Selection mode can now be used without `transient-mark-mode'.
452 *** `desktop-auto-save-timeout' defines the number of seconds idle time
453 before auto-save of the desktop.
455 *** `desktop-restore-frames', enabled by default, allows saving and
456 restoring the frame/window configuration (frameset). Additional options
457 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
458 and `desktop-restore-forces-onscreen' offer further customization.
463 *** New minor mode `dired-hide-details-mode' hides details.
465 ** Eldoc Mode works properly in the minibuffer.
467 ** Electric Pair mode
469 *** New option `electric-pair-preserve-balance', enabled by default.
470 If non-nil, pairing/skipping only kicks in when that help the balance
471 of parentheses and quotes, i.e. the buffer should end up at least as
474 You can further control this behavior by adjusting the predicates
475 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
477 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
478 In `electric-pair-mode', the commands `backward-delete-char' and
479 `backward-delete-char-untabify' are now bound to electric variants
480 that delete the closer when invoked between adjacent pairs.
482 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
483 In `electric-pair-mode', inserting a newline between adjacent pairs
484 opens an extra newline after point, which is indented if
485 `electric-indent-mode' is also set.
487 *** New option `electric-pair-skip-whitespace', enabled by default.
488 This controls if skipping over closing delimiters should jump over any
489 whitespace slack. Setting it to `chomp' makes it delete this
490 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
492 *** New variables control the pairing in strings and comments.
493 You can customize `electric-pair-text-pairs' and
494 `electric-pair-text-syntax-table' to tweak pairing behavior inside
495 strings and comments.
499 *** New option `epa-mail-aliases'.
500 You can set this to a list of alias expansions for keys to use
501 in `epa-mail-encrypt'.
503 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
504 that means: when one of the recipients of the message being encrypted
505 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
507 If one element of the variable's value is ("foo@bar.com"),
508 that means: when one of the recipients of the message being encrypted
509 is `foo@bar.com', ignore that name as regards encryption.
510 This is useful to avoid a query when you have no key for that name.
514 *** New option `erc-accidental-paste-threshold-seconds'.
515 If set to a number, this can be used to avoid accidentally pasting large
516 amounts of data into the ERC input.
519 ** New ERT macro `skip-unless' allows skipping ERT tests.
520 See the ERT manual for details.
525 *** `eshell' now supports visual subcommands and options.
526 Eshell has been able to handle "visual" commands (interactive,
527 non-line oriented commands such as top that require display
528 capabilities not provided by eshell) by running them in an Emacs
529 terminal emulator. See `eshell-visual-commands'.
531 This feature has been extended to subcommands and options that make a
532 usually line-oriented command a visual command. Typical examples are
533 "git log" and "git <command> --help", which display their output in a
534 pager by default. See `eshell-visual-subcommands' and
535 `eshell-visual-options'.
538 *** New Eshell-Tramp module.
539 External su and sudo commands are now the default; the internal,
540 Tramp-using variants can still be used by enabling the eshell-tramp
545 *** New option `f90-smart-end-names'.
547 ** Icomplete is a bit more like Ido.
549 *** Key bindings to navigate through and select the completions.
551 *** The icomplete-separator is customizable, and its default has changed.
553 *** Removed `icomplete-show-key-bindings'.
555 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
556 (setq icomplete-with-completion-tables '(internal-complete-buffer))
557 will revert to the old behavior.
561 *** Ido has a manual now.
563 *** `ido-use-virtual-buffers' takes a new value 'auto.
565 *** `ido-decorations' has been slightly extended to give a bit more control.
570 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
571 visit the next image file and the previous image file in the same
572 directory, respectively.
575 *** New commands to show specific frames of multi-frame images.
576 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
577 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
580 *** New commands to speed up, slow down, or reverse animation.
581 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
582 speed up and slow down the animation. `a r' (`image-reverse-speed')
583 to reverse it and `a 0' (`image-reset-speed') to reset it.
586 *** The command `image-mode-fit-frame' deletes other windows.
587 When toggling, it restores the frame's previous window configuration.
588 It also has an optional frame argument, which can be used by Lisp
589 callers to fit the image to a frame other than the selected frame.
593 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
594 will cycle through faces in `hi-lock-face-defaults' without prompting.
597 *** New global command `M-s h .' (`highlight-symbol-at-point')
598 highlights the symbol found near point without prompting,
599 using the next face automatically.
601 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
604 ** New Info face `info-index-match', used to highlight matches in index
605 entries displayed by `Info-index-next', `Info-virtual-index' and
610 *** Better indentation of multiple-variable declarations.
611 If declaration spans several lines, variables on the following lines
612 are lined up to the first one.
614 *** We now recognize and better indent continuations in array
617 *** New option `js-switch-indent-offset`.
619 ** MH-E has been updated to MH-E version 8.5.
620 See MH-E-NEWS for details.
625 *** Font locking for texinfo comments and new keywords.
627 *** Completion in Octave file buffers.
631 *** Jump to definition.
633 *** Documentation lookup/search.
635 ** OPascal mode is the new name for Delphi mode.
637 *** All delphi-* variables and functions have been renamed to opascal-*.
639 *** `delphi-newline-always-indents' is not supported any more.
640 Use `electric-indent-mode' instead.
642 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
646 *** The format of `archive-contents' files, generated by package
647 repositories, has changed to allow a new (fifth) element in the data
648 vectors, containing an associative list with extra properties.
650 *** `describe-package' buffer uses the `:url' extra property to
651 display a `Homepage' header, if it's present.
653 *** In the buffer produced by `describe-package', there are now buttons
654 listing the keywords related to that package. You can click on them
655 to see other packages related to any given keyword.
657 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
658 the packages by a keyword.
661 ** In Prolog mode, `prolog-use-smie' has been removed,
662 along with the non-SMIE indentation code.
666 *** The new command `remember-notes' creates a buffer that is saved on
667 `kill-emacs'. You can think of it as a *scratch* buffer whose content
668 is preserved. In fact, it was designed as a replacement for *scratch*
669 buffer and can be used that way by setting `initial-buffer-choice' to
670 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
671 Without the second change, the *scratch* buffer will still be there
672 for notes that do not need to be preserved.
674 *** The Remember package can now store notes in separates files.
675 You can use the new function `remember-store-in-files' within the
676 `remember-handler-functions' option. See `remember-data-directory'
677 and `remember-directory-file-name-format' for new options related to
682 *** Customize `rmail-mbox-format' to influence some minor aspects of
683 how Rmail displays non-MIME messages.
686 *** The `unrmail' command now converts from BABYL to mboxrd format,
687 rather than mboxo. Customize `unrmail-mbox-format' to change this.
691 *** New option `ruby-encoding-magic-comment-style'.
693 *** New option `ruby-custom-encoding-magic-comment-template'.
695 *** Improved syntax highlighting and indentation.
697 *** More Ruby file types have been added to `auto-mode-alist'.
699 *** New option `ruby-align-to-stmt-keywords'.
701 *** New `electric-indent-mode' integration.
703 ** Search and Replace
706 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
707 starts a symbol (identifier) incremental search forward with the
708 symbol found near point added to the search string initially.
711 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
712 and adds it to the search string.
714 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
715 between nil and the value of the option `search-invisible' (or `open'
718 *** `query-replace' skips invisible text when `search-invisible' is nil,
719 and opens overlays with hidden text when `search-invisible' is `open'.
722 *** A negative prefix arg of replacement commands replaces backward.
723 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
724 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
727 *** By default, prefix arguments do not now terminate Isearch mode.
728 Set `isearch-allow-prefix' to nil to restore old behavior.
731 *** More Isearch commands accept prefix arguments, namely
732 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
736 *** Word search now matches whitespace at the beginning/end
737 of the search string if it contains leading/trailing whitespace.
738 In an incremental word search or when using a non-nil LAX argument
739 of `word-search-regexp', the lax matching can also match part of
740 the first word (in addition to the lax matching of the last word).
741 The same rules are now applied to the symbol search with the difference
742 that it matches symbols, and non-symbol characters between symbols.
745 ** New SES command `ses-rename-cell' allows assigning names to SES cells.
748 ** The shell.el option `explicit-bash-args' includes --noediting by default.
749 All non-ancient Bash versions support this option.
753 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
755 *** The SMIE indentation engine is now used by default.
757 ** SMIE indentation can be customized via `smie-config'.
758 Emacs can learn the appropriate indentation settings if you provide it
759 with an indented sample file.
761 ** New Term mode option `term-suppress-hard-newline'.
763 ** Todo mode has been rewritten and enhanced.
764 New features include:
765 *** Support for multiple todo files and archive files of done items
766 *** Renaming, reordering, moving, merging, and deleting categories
767 *** Sortable tabular summaries of categories and the types of items they contain
768 *** Cross-category lists of items filtered by specific criteria
769 *** More fine-grained interaction with the Emacs diary, by being able to decide
770 for each todo item whether it appears in the Fancy Diary display
771 *** Highly flexible new item insertion and item editing
772 *** Moving items between categories, storing done items in their category or in
773 archive files, undoing or unarchiving done items
774 *** Reprioritizing items by inputting a numerical priority
775 *** Extensive customizability of operation and display, including numerous faces
777 The Todo mode user manual describes all commands and most user
778 options. To support some of these features, a new file format is
779 used, which is incompatible with the old format; however, you can
780 convert old todo and done item files to the new format on initializing
781 the first new todo file, or at any later time with the provided
782 conversion command. The previous version of todo-mode.el has been
783 renamed to otodo-mode.el and is now obsolete.
787 *** No prompting for the destination buffer, unless a prefix argument is used.
789 *** With a prefix argument, you can enter a "context"; i.e., a Lisp
790 expression whose value at the time the function is entered/exited will
791 be printed along with the function name and arguments. For example,
792 you can use this to trace the value of current-buffer or point.
796 *** The experimental url syntax for remote file names has been removed.
799 *** New connection method "adb", which allows to access Android
800 devices by the Android Debug Bridge. The variable `tramp-adb-program'
801 can be used to adapt the path of the "adb" program, if needed.
803 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
804 "scpc" and "rsyncc" are discontinued. The ssh option
805 "ControlMaster=auto" is set automatically in all ssh-based methods,
809 *** Handlers for `file-acl' and `set-file-acl' for remote machines
810 which support POSIX ACLs.
813 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
814 for remote machines which support filesystem notifications.
816 ** New command `url-cookie-list' displays all the current cookies, and
817 allows deleting selected cookies.
819 ** VC and related modes
822 *** In VC directory mode, `D' displays diffs between VC-controlled
823 whole tree revisions.
826 *** In VC directory mode, `L' lists the change log for the current VC
827 controlled tree in a window.
830 *** In VC directory mode, `I' shows a log of changes that will be
831 received with a pull operation.
834 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
835 under current version control system. When called with a prefix
836 argument, you can remove a file from the ignored file list.
839 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
840 because it is moved to vc-cvs.el.
845 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
848 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
850 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
851 are obsolete. Customize the `woman-*' faces instead.
853 ** Obsolete packages:
855 *** Iswitchb is made obsolete by icomplete-mode.
857 *** longlines.el is obsolete; use visual-line-mode instead.
862 *** terminal.el is obsolete; use term.el instead.
864 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
866 *** xesam.el is obsolete, because the XESAM project has been canceled.
869 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
872 *** The Info-edit command is obsolete. Editing Info nodes by hand
873 has not been relevant for some time.
876 * New Modes and Packages in Emacs 24.4
879 ** New package `eww' is a built-in web browser.
880 It is only available if Emacs is compiled with libxml2 support.
882 ** New minor mode `superword-mode'.
883 This overrides the default word motion commands to treat "symbol_words"
884 as a single word, similar to what `subword-mode' does.
887 ** New package nadvice.el offers lighter-weight advice facilities.
890 *** add-function/remove-function, which can be used to add/remove code on any
891 function-carrying place, such as process-filters or `<foo>-function' hooks.
893 *** advice-add/advice-remove to add/remove a piece of advice on a named
894 function,much like `defadvice' does.
896 ** New package frameset.el.
897 It provides a set of operations to save a frameset (the state of all
898 or a subset of the existing frames and windows, somewhat similar to a
899 frame configuration), both in-session and persistently, and restore it
900 at some point in the future.
903 ** New package filenotify.el provides an interface for file system
904 notifications. It requires that Emacs be compiled with one of the
905 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
908 * Incompatible Lisp Changes in Emacs 24.4
911 ** `kill-region' has lost its `yank-handler' optional argument.
914 ** `(input-pending-p)' no longer runs other timers that are ready to run.
915 The new optional CHECK-TIMERS parameter allows for the prior behavior.
918 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
921 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
922 Some languages match those as »...«, and others as «...», so it is
923 better for Emacs to stay neutral by default.
926 ** In compiled Lisp files, the header no longer includes a timestamp.
929 ** The default file coding for Emacs Lisp files is now utf-8.
930 (See `file-coding-system-alist'.) In most cases, this change is
931 transparent, but files that contain unusual characters without
932 specifying an explicit coding system may fail to load with obscure
933 errors. You should either convert them to utf-8 or add an explicit
937 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
938 It used to disable the minor mode, major mode, and text-property keymaps,
939 whereas now it simply has higher precedence.
941 ** Default process filters and sentinels are not nil any more.
942 Instead they default to a function that does what the nil value used to do.
945 ** `read-event' does not return decoded chars in ttys any more.
946 As was the case in Emacs 22 and before, the decoding of terminal
947 input, according to `keyboard-coding-system', is not performed in
948 `read-event' any more. But unlike in Emacs 22, this decoding is still
949 done before input-decode-map, function-key-map, etc.
952 ** The option `inhibit-local-menu-bar-menus' has been removed.
955 ** Frame-local variables that affect redisplay do not work any more.
956 More specifically, redisplay does not bother to check for a frame-local
957 value when looking up variables.
960 ** nil and "unbound" are indistinguishable in `symbol-function'.
961 `symbol-function' does not signal a `void-function' error any more.
962 To determine if a symbol's function definition is void, use `fboundp'.
965 ** `defadvice' does not honor the `freeze' flag and cannot advise
966 special-forms any more.
969 ** `dolist' no longer binds VAR while evaluating the RESULT form,
970 when lexical binding is enabled. Previously, VAR was bound to nil,
971 which often led to spurious unused-variable warnings.
974 ** The return value of `backup-buffer' has changed.
975 The second argument is no longer an SELinux context, instead it is an
976 alist of extended attributes as returned by the new function
977 `file-extended-attributes'. The attributes can be applied to another
978 file using `set-file-extended-attributes'.
981 ** By default `copy-file' no longer copies file permission bits to an
982 existing destination; and it sets the file permission bits of a newly
983 created destination to those of the source, masked by the default file
984 permissions. To copy the file permission bits, pass t as the
985 PRESERVE-PERMISSIONS argument of `copy-file'.
988 ** `visited-file-modtime' now returns -1 for nonexistent files.
989 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
990 in the presence of files with negative time stamps.
993 ** The cars of the elements in `interpreter-mode-alist' are now
994 treated as regexps rather than literal strings.
997 * Lisp Changes in Emacs 24.4
1000 ** The second argument of `eval' can now specify a lexical environment.
1003 ** New functions `special-form-p' and `macrop'.
1005 ** New macro `define-alternatives' can be used to define generic commands.
1006 Generic commands are interactive functions whose implementation can be
1007 selected among several alternatives, as a matter of user preference.
1009 ** The `defalias-fset-function' property lets you catch `defalias'
1010 calls, and redirect them to your own function, instead of `fset'.
1013 ** New variable `enable-dir-local-variables'.
1014 Directory-local variables are ignored if this is nil. This may be
1015 useful for modes that want to ignore directory-locals while still
1016 respecting file-local variables.
1019 ** New function `get-pos-property'.
1021 ** Completion changes
1023 *** The separator for `completing-read-multiple' can now be a regexp.
1024 The default separator has been changed to allow surrounding spaces
1027 *** The `common-substring' arg of `display-completion-list' is obsolete.
1028 Either use `completion-all-completions', which returns highlighted
1029 strings (including for partial or substring completion), or call
1030 `completion-hilit-commonality' to add the highlight.
1032 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1033 let you enable symbol prettification (replacing a string like "lambda" with
1034 the Greek lambda character).
1039 *** Functions to pop up menus and dialogs now work on all terminals,
1040 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1041 `message-box', `yes-or-no-p', etc.
1043 The function `display-popup-menus-p' will now return non-nil for a
1044 display or frame whenever a mouse is supported on that display or
1047 *** New hook `tty-setup-hook'.
1051 *** New display action function `display-buffer-no-window' to not
1052 display the buffer in a window.
1054 *** New display action alist entry `allow-no-window' to indicate the
1055 caller of `display-buffer' is ready to handle the case of not
1056 displaying the buffer in a window.
1058 ** New hook `pre-redisplay-function'.
1061 ** New bool-vector set operation functions:
1062 *** `bool-vector-exclusive-or'
1063 *** `bool-vector-union'
1064 *** `bool-vector-intersection'
1065 *** `bool-vector-set-difference'
1066 *** `bool-vector-not'
1067 *** `bool-vector-subsetp'
1068 *** `bool-vector-count-consecutive'
1069 *** `bool-vector-count-population'
1072 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1074 ** Error-handling changes
1077 *** New function `define-error'.
1079 *** `with-demoted-errors' takes an additional argument `format'.
1082 ** New macro `with-eval-after-load'.
1083 This is like the old `eval-after-load', but better behaved.
1086 ** New library subr-x.el with miscellaneous small utility functions
1087 *** `hash-table-keys'
1088 *** `hash-table-values'
1089 *** `string-blank-p`
1090 *** `string-empty-p`
1092 *** `string-reverse`
1093 *** `string-trim-left'
1094 *** `string-trim-right'
1096 *** `string-remove-prefix'
1097 *** `string-remove-suffix'
1100 ** Obsoleted functions:
1103 *** `lisp-complete-symbol'
1104 *** `field-complete'
1105 *** `minibuffer-completion-contents'
1106 *** `isearch-nonincremental-exit-minibuffer'
1107 *** `isearch-filter-visible'
1108 *** `generic-make-keywords-list'
1109 *** `get-upcase-table' (use `case-table-get-table' instead).
1111 ** `with-wrapper-hook' is obsoleted by `add-function'.
1112 The few hooks that used with-wrapper-hook are replaced as follows:
1113 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1114 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1115 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1118 ** `byte-compile-interactive-only-functions' is now obsolete.
1119 To specify that a command should only be called interactively, give it
1120 a non-nil `interactive-only' property.
1123 ** `split-string' now takes an optional argument TRIM.
1124 The value, if non-nil, is a regexp that specifies what to trim from
1125 the start and end of each substring.
1128 ** New function `string-suffix-p'.
1130 ** File-handling changes
1133 *** Support for filesystem notifications.
1134 Emacs now supports notifications of filesystem changes, such as
1135 creation, modification, and deletion of files. This requires the
1136 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1137 MS-Windows systems, this is supported for Windows XP and newer
1141 *** The 9th element returned by `file-attributes' is now unspecified.
1142 Formerly, it was t if the file's gid would change if file were deleted
1143 and recreated. This value has been inaccurate for years on many
1144 platforms, and nobody seems to have noticed or cared.
1147 *** The 6th argument to `copy-file' has been renamed to
1148 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1149 Unix file permission bits as well as SELinux context.
1152 *** The function `file-ownership-preserved-p' now has an optional
1153 argument GROUP which causes it check for file group too. This can be
1154 used in place of the 9th element of `file-attributes'.
1157 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1158 argument, with the same interpretation as the returned value of
1159 `visited-file-modtime'.
1161 ** Autorevert changes
1164 *** If Emacs is compiled with file notification support, notifications
1165 are used instead of checking the time stamp of the files. You can
1166 disable this by setting the user option `auto-revert-use-notify' to
1167 nil. Alternatively, a regular expression of directories to be
1168 excluded from file notifications can be specified by
1169 `auto-revert-notify-exclude-dir-regexp'.
1172 *** The new user option `auto-revert-remote-files' enables reversion
1173 of remote files when set to non-nil.
1177 *** The function `face-spec-set' is now like `setq' for face specs.
1178 Its third arg now accepts values specifying a face spec type (defface,
1179 custom, or override spec), and the relevant spec is set accordingly.
1182 *** New function `add-face-text-property', which can be used to
1183 conveniently prepend/append new face properties.
1185 *** Face specs set via Custom themes now replace the `defface' spec
1186 rather than inheriting from it (as do face specs set via Customize).
1188 *** New face characteristic (supports :underline (:style wave))
1189 specifies whether or not the terminal can display a wavy line.
1192 *** New face spec attribute :distant-foreground
1193 specifies foreground to use if background color is near the foreground
1194 color that would otherwise have been used.
1199 *** `image-animated-p' is now `image-multi-frame-p'.
1200 It returns non-nil for any image that contains multiple frames,
1201 whether or not it specifies a frame delay.
1204 *** New variable `image-default-frame-delay' gives the frame delay for
1205 animated images which do not specify a frame delay.
1208 *** New functions `image-current-frame' and `image-show-frame' for getting
1209 and setting the current frame of a multi-frame image.
1214 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1215 **** object-name -> eieio-object-name
1216 **** object-class -> eieio-object-class
1217 **** object-class-fast -> eieio--object-class
1218 **** object-class-name -> eieio-object-class-name
1219 **** object-name-string -> eieio-object-name-string
1220 **** object-num-slots -> eieio--object-num-slots
1221 **** object-set-name-string -> eieio-object-set-name-string
1222 **** class-of -> eieio-object-class
1223 **** class-name -> eieio-class-name
1224 **** class-parent -> eieio-class-parent
1225 **** class-parents -> eieio-class-parents
1226 **** class-parents-fast -> eieio-class-parents-fast
1227 **** class-children -> eieio-class-children
1228 **** class-num-slots -> eieio--class-num-slots
1229 **** class-precedence-list -> eieio-class-precedence-list
1230 **** class-direct-subclasses -> eieio-class-children
1231 **** class-direct-superclasses -> eieio-class-parents
1233 ** Changes in encoding and decoding of text
1236 *** New coding-system `prefer-utf-8'.
1237 This is like `undecided' but prefers UTF-8 on decoding if the text to
1238 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1239 any non-ASCII characters are automatically encoded as UTF-8.
1242 *** New attributes of coding-systems whose type is `undecided'.
1243 Two new attributes, `:inhibit-null-byte-detection' and
1244 `:inhibit-iso-escape-detection', determine how to detect encoding of
1245 text that includes null bytes and ISO-2022 escape sequences,
1246 respectively. Each of these attributes can be either nil, zero, or
1247 t. If it is t, decoding text ignores null bytes and, respectively,
1248 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1249 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1250 text is encoded in one of the ISO-2022 encodings, such as
1251 iso-2022-7bit. If the value is zero, Emacs consults the variables
1252 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1254 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1255 UTF-8 encoding and decoding, whenever possible.
1257 These attributes are only meaningful for coding-systems of type
1258 `undecided'. (The type of a coding-system is determined by its
1259 `:coding-type' attribute and can be accessed by calling the
1260 `coding-system-type' function.)
1262 ** `time-to-seconds' is not obsolete any more.
1264 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1265 When you edit DIR/FILE, Emacs normally creates a symbolic link
1266 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1267 is being edited. Formerly, if there was already a non-symlink file
1268 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1269 through DIR/.#FILE.9. These fallbacks have been removed, so that
1270 Emacs now no longer locks DIR/FILE in that case.
1272 On file systems that do not support symbolic links, the lock is now a
1273 regular file with contents being what would have been in the symlink.
1276 ** New functions `group-gid' and `group-real-gid'.
1279 ** The spelling of the rx.el category `chinese-two-byte' has been
1280 corrected (the first 'e' was missing).
1282 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1285 *** The package descriptor and name of global variables, constants,
1286 and functions should be separated by two hyphens if the symbol is not
1287 meant to be used by other packages.
1290 * Changes in Emacs 24.4 on Non-Free Operating Systems
1292 ** The procedure for building Emacs on MS-Windows has changed.
1293 It is now built by running the same configure script as on all other
1294 platforms. This requires the MSYS environment and MinGW development
1295 tools. See the updated instructions in nt/INSTALL for details.
1297 Using the Posix configure script and Makefile's also means a change in
1298 the directory structure of the Emacs installation on Windows. It is
1299 now the same as on GNU and Unix systems. In particular, the auxiliary
1300 programs, such as cmdproxy.exe and hexl.exe, are in
1301 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1302 version), version-independent site-lisp is in share/emacs/site-lisp,
1303 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1304 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1305 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1306 directories and will find the files in there automatically; there's no
1307 need to set any variables due to this change.)
1310 ** Emacs on Windows 2000 and later can now access files and directories
1311 whose names cannot be encoded in the current system codepage.
1313 The new variable `w32-unicode-filenames' controls this feature: if it
1314 is t, Emacs uses Unicode APIs to pass file names to system calls,
1315 which lifts the limitation of file names to the current locale.
1318 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1319 The backtrace is written to the 'emacs_backtrace.txt' file in the
1320 directory where Emacs was running.
1323 ** The variable `buffer-file-type' is no longer supported.
1324 Setting it has no effect, and %t in the mode-line format is ignored.
1325 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1326 modifying it has no effect.
1329 ** Lock files now work on MS-Windows.
1330 This allows to avoid losing your edits if the same file is being
1331 edited in another Emacs session or by another user. See the node
1332 "Interlocking" in the Emacs User Manual for the details. To disable
1333 file locking, customize `create-lockfiles' to nil.
1335 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1336 GNUstep and Mac OS X 10.4 use the old font backend.
1337 To use the old backend by default, do on the command line:
1338 % defaults write org.gnu.Emacs FontBackend ns
1340 ** Improved fullscreen support on Mac OS X.
1341 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1342 Customize `ns-use-native-fullscreen' to change the style.
1343 For Mac OS X 10.7 and newer, native is the default.
1345 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1346 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1347 does not apply to images.
1350 * Installation Changes in Emacs 24.3
1352 ** The default X toolkit is now Gtk+ version 3.
1353 If you don't pass `--with-x-toolkit' to configure, or if you use
1354 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1355 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1356 You can explicitly require a specific version by passing
1357 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1359 ** New configure option `--enable-link-time-optimization', to utilize
1360 an appropriate feature provided by GCC since version 4.5.0.
1362 ** New configure option `--without-all' to disable most of the optional
1363 features (image support, etc.) that are normally enabled by default.
1365 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1366 Emacs). If building with GCC, this enables compile-time checks that
1367 warn/give errors about possibly-questionable C code. On a recent GNU
1368 system there should be no warnings; on older and on non-GNU systems
1369 the results may be useful to developers.
1371 ** The configure option `--enable-use-lisp-union-type' has been
1372 renamed to `--enable-check-lisp-object-type', as the resulting
1373 Lisp_Object type no longer uses a union to implement the compile time
1374 check that this option enables.
1376 ** The configure option `--disable-maintainer-mode' has been removed,
1377 as it was confusingly-named and rarely useful.
1379 ** The configure options `--program-prefix', `--program-suffix', and
1380 `--program-transform-name' apply to more than just the installed
1381 binaries. Now they also affect the man pages, icons, and the
1382 etc/emacs.desktop file; but not the info pages, since this would break
1383 links between the various manuals.
1385 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1386 overwriting "emacs" in the installation bin/ directory with a link
1389 ** Emacs uses libtinfo in preference to libncurses, if available.
1391 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1392 /usr/pkg/lib to the linker search path. You must add them yourself if
1395 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1396 (from the bin and libexec directories, respectively). The former is
1397 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1400 * Startup Changes in Emacs 24.3
1402 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1403 lisp/ directory. There should not be any there anyway. If you have
1404 been adding them there, put them somewhere else; e.g., site-lisp.
1406 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1409 * Changes in Emacs 24.3
1413 *** `C-h f' (`describe-function') can now perform autoloading.
1414 When this command is called for an autoloaded function whose docstring
1415 contains a key substitution construct, that function's library is
1416 automatically loaded, so that the documentation can be shown
1417 correctly. To disable this, set `help-enable-auto-load' to nil.
1419 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1420 even after their associated libraries have been loaded (and the
1421 autoloads have been redefined as functions).
1425 *** Images displayed via ImageMagick now support transparency and the
1426 :background image specification property.
1428 *** When available, ImageMagick support is automatically enabled.
1429 It is no longer necessary to call `imagemagick-register-types'
1430 explicitly to install ImageMagick image types; that function is called
1431 automatically at startup, or when customizing an imagemagick- option.
1433 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1434 ImageMagick to view images. (You must call `imagemagick-register-types'
1435 afterwards if you do not use customize to change this.)
1437 *** The new variable `imagemagick-enabled-types' also affects which
1438 ImageMagick types are treated as images. The function
1439 `imagemagick-filter-types' returns the list of types that will be
1444 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1445 next and previous path separator, respectively.
1447 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1448 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1449 non-nil before enabling the mode.
1453 *** New option `mode-line-default-help-echo' specifies the help text
1454 (shown in a tooltip or in the echo area) for any part of the mode line
1455 that does not have its own specialized help text.
1457 *** You can now click mouse-3 in the coding system indicator to invoke
1458 `set-buffer-file-coding-system'.
1460 ** Server and client
1462 *** emacsclient now obeys string values for `initial-buffer-choice',
1463 if it is told to open a new frame without specifying any file to visit
1464 or expression to evaluate.
1466 *** New option `server-auth-key' specifies a shared server key.
1468 ** Emacs now generates backtraces on fatal errors.
1469 On encountering a fatal error, Emacs now outputs a textual description
1470 of the fatal signal, and a short backtrace on platforms like glibc
1471 that support backtraces.
1473 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1474 This minor mode replaces `toggle-read-only', which is now obsolete.
1476 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1477 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1478 respectively, without exiting from the prompt.
1480 ** In the Package Menu, newly-available packages are listed as "new",
1481 and sorted above the other "available" packages by default.
1483 ** If your Emacs was built from a repository checkout, the new variable
1484 `emacs-bzr-version' contains information about the bzr revision used.
1486 ** New option `create-lockfiles' specifies usage of lockfiles.
1487 It defaults to t. Changing it to nil inhibits the creation of lock
1488 files (use this with caution).
1490 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1491 variables on remote hosts.
1493 ** The entry for PCL-CVS has been removed from the Tools menu.
1494 The PCL-CVS commands are still available via the keyboard.
1496 ** Using "unibyte: t" in Lisp source files is obsolete.
1497 Use "coding: raw-text" instead.
1499 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1500 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1501 The previous binding, introduced in Emacs 24.1, was a mistake, because
1502 `C-c LETTER' bindings are reserved for user customizations.
1504 ** Internationalization
1506 *** New language environment: Persian.
1508 *** New input method `vietnamese-vni'.
1510 ** Nextstep (GNUstep / Mac OS X) port
1512 *** Support for fullscreen and the frame parameter fullscreen.
1514 *** A file dialog is used for open/save operations initiated from the
1518 * Editing Changes in Emacs 24.3
1520 ** Search and Replace
1522 *** Non-regexp Isearch now performs "lax" space matching.
1523 Each sequence of spaces in the supplied search string may match any
1524 sequence of one or more whitespace characters, as specified by the
1525 variable `search-whitespace-regexp'. (This variable is also used by a
1526 similar existing feature for regexp Isearch.)
1528 *** New Isearch command `M-s SPC' toggles lax space matching.
1529 This applies to both ordinary and regexp Isearch.
1531 *** New option `replace-lax-whitespace'.
1532 If non-nil, `query-replace' uses flexible whitespace matching too.
1535 *** Global `M-s _' starts a symbol (identifier) incremental search,
1536 and `M-s _' in Isearch toggles symbol search mode.
1537 `M-s c' in Isearch toggles search case-sensitivity.
1539 ** Navigation commands
1541 *** New binding `M-g c' for `goto-char'.
1543 *** New binding `M-g TAB' for `move-to-column'.
1545 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1546 interactively with no prefix arg. Previously, it moved to column 1.
1548 ** New option `yank-handled-properties' allows processing of text
1549 properties on yanked text, in ways that are more general than just
1550 removing them (as is done by `yank-excluded-properties').
1552 ** New option `delete-trailing-lines' specifies whether
1553 M-x delete-trailing-whitespace should delete trailing lines at the end
1554 of the buffer. It defaults to t.
1556 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1558 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1559 `ucs-insert' is now an obsolete alias for `insert-char'.
1561 ** The `z' key no longer has a binding in most special modes.
1562 It used to be bound to `kill-this-buffer', but `z' is too easy to
1565 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1566 It copies the region-rectangle as the last rectangle kill.
1570 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1572 *** New option `register-separator' specifies the register containing
1573 the text to put between collected texts for use with
1574 M-x append-to-register and M-x prepend-to-register.
1577 * Changes in Specialized Modes and Packages in Emacs 24.3
1579 ** Common Lisp emulation (CL)
1581 *** CL's main entry is now (require 'cl-lib).
1582 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1583 i.e., all its definitions have the "cl-" prefix (and internal definitions
1584 use the "cl--" prefix).
1586 If `cl' provided a feature under the name `foo', then `cl-lib'
1587 provides it under the name `cl-foo' instead; with the exceptions of the
1588 few `cl' definitions that had to use `foo*' to avoid conflicts with
1589 pre-existing Elisp entities. These have been renamed to `cl-foo'
1590 rather than `cl-foo*'.
1592 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1593 provide the old, non-prefixed names. Some exceptions are listed below:
1595 *** `cl-flet' is not like `flet' (which is deprecated).
1596 Instead it obeys the behavior of Common-Lisp's `flet'.
1597 In particular, in cl-flet function definitions are lexically scoped,
1598 whereas in flet the scoping is dynamic.
1600 *** `cl-labels' is slightly different from `labels'.
1601 The difference is that it relies on the `lexical-binding' machinery
1602 (as opposed to the `lexical-let' machinery used previously) to capture
1603 definitions in closures, so such closures will only work if `lexical-binding'
1606 *** `cl-letf' is not exactly like `letf'.
1607 The only difference is in details that relate to some deprecated usage
1608 of `symbol-function' in place forms.
1610 *** `progv' was rewritten to use the `let' machinery.
1611 A side effect is that variables without corresponding values are bound
1612 to nil rather than being made unbound.
1614 *** The following methods of extending `setf' are obsolete
1615 (use features from gv.el instead):
1616 `define-modify-macro' (use `gv-letplace')
1617 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1618 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1619 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1623 *** Changes are now highlighted using the same color scheme as in
1624 modern VCSes. Deletions are displayed in red (new faces
1625 `diff-refine-removed' and `smerge-refined-removed', and new definition
1626 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1627 and `smerge-refined-added', and new definition of `diff-added').
1629 *** The variable `diff-use-changed-face' defines whether to use the
1630 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1631 changes in context diffs.
1633 *** The new command `diff-delete-trailing-whitespace' removes trailing
1634 whitespace introduced by a diff.
1636 ** Ediff now uses the same color scheme as Diff mode.
1640 A new version of python.el, which provides several new features, including:
1641 per-buffer shells, better indentation, Python 3 support, and improved
1642 shell-interaction compatible with iPython (and virtually any other
1645 *** Some user options have been replaced/renamed, including (old -> new):
1646 **** python-indent -> python-indent-offset
1647 **** python-guess-indent -> python-indent-guess-indent-offset
1648 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1649 **** python-use-skeletons -> python-skeleton-autoinsert
1651 *** Some user options have been removed, including:
1653 **** `python-indent-string-contents': Strings are never indented.
1655 **** `python-honour-comment-indentation':
1656 Comments are always considered as indentation markers.
1658 **** `python-continuation-offset': Indentation is automatically
1659 calculated in a pep8 compliant way depending on the context.
1661 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1662 Have no direct mapping as the shell interaction is completely different.
1664 **** `python-python-command', `python-jython-command':
1665 Replaced by `python-shell-interpreter'.
1667 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1668 `python-pdbtrack-minor-mode-string', `python-source-modes':
1671 *** Some commands have been replaced (old -> new):
1672 **** python-insert-class -> python-skeleton-class
1673 **** python-insert-def -> python-skeleton-def
1674 **** python-insert-for -> python-skeleton-for
1675 **** python-insert-if -> python-skeleton-if
1676 **** python-insert-try/except -> python-skeleton-try
1677 **** python-insert-try/finally -> python-skeleton-try
1678 **** python-insert-while -> python-skeleton-while
1679 **** python-find-function -> python-nav-jump-to-defun
1680 **** python-next-statement -> python-nav-forward-sentence
1681 **** python-previous-statement -> python-nav-backward-sentence
1682 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1683 **** python-end-of-defun-function -> python-nav-end-of-defun
1684 **** python-send-buffer -> python-shell-send-buffer
1685 **** python-send-defun -> python-shell-send-defun
1686 **** python-send-region -> python-shell-send-region
1687 **** python-send-region-and-go -> emulate with python-shell-send-region
1688 and python-shell-switch-to-shell
1689 **** python-send-string -> python-shell-send-string
1690 **** python-switch-to-python -> python-shell-switch-to-shell
1691 **** python-describe-symbol -> python-eldoc-at-point
1695 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1697 *** The D-Bus object manager interface is implemented.
1699 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1700 if their value does not fit into Emacs's integer range.
1702 *** The function `dbus-call-method' is now non-blocking.
1703 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1705 *** Signals can also be sent as unicast messages.
1707 *** The argument list of `dbus-register-signal' has been extended,
1708 according to the new match rule types of D-Bus.
1710 *** `dbus-init-bus' supports private connections.
1712 *** There is a new function `dbus-setenv'.
1714 ** `desktop-path' no longer includes the "." directory.
1715 Desktop files are now located in ~/.emacs.d by default.
1719 *** `dired-do-async-shell-command' executes each file sequentially
1720 if the command ends in `;' (when operating on multiple files).
1721 Otherwise, it executes the command on each file in parallel.
1723 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1724 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1727 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1728 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1729 mark/unmark/flag all files in the active region.
1731 *** The minibuffer default for `=' (`dired-diff') has changed.
1732 It is now the backup file for the file at point, if one exists.
1733 In Transient Mark mode the default is the file at the active mark.
1735 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1736 The global binding for `M-=', `count-words-region' is in effect.
1740 *** New module "notifications", which can send a notification when you
1741 receive a private message or your nickname is mentioned.
1743 *** ERC will look up server/channel names via auth-source and use any
1746 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1747 only applies to messages sent by lurkers.
1749 ** reStructuredText mode
1751 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1752 fontification, comment handling, and customization have all been revised
1755 *** Support for `imenu' and `which-function-mode'.
1757 *** The reStructuredText syntax is more closely covered.
1758 Sphinx support has been improved.
1760 *** `rst-insert-list' inserts new list or continues existing lists.
1762 *** A negative prefix argument always works for `rst-adjust'.
1764 *** The window configuration is reset after displaying a TOC.
1766 *** The constant `rst-version' describes the rst.el package version.
1770 *** Support for percent literals and recognition of regular expressions
1771 in method calls without parentheses with more methods, including Cucumber
1774 *** Improved syntax highlighting and indentation.
1776 *** New command `ruby-toggle-block', bound to `C-c {'.
1778 *** Some non-standard keybindings/commands have been removed:
1780 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1782 **** `ruby-mark-defun'; use `mark-defun'.
1784 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1785 appropriate settings for the variables `beginning-of-defun-function'
1786 and `end-of-defun-function'.
1788 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1789 `reindent-then-newline-and-indent' and `newline' have been removed.
1791 ** Shell Script mode
1793 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1795 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1797 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1801 *** The free software compiler GHDL is supported (and now the default).
1803 *** Support for the VHDL-AMS packages has been added/updated.
1805 *** Updated to the 2002 revision of the VHDL standard.
1807 *** Accepts \r and \f as whitespace.
1811 *** The faces used by Apropos are now directly customizable.
1812 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1813 see the `apropos' Custom group for details.
1815 *** The old options whose values specified faces to use have been removed
1816 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1820 *** This package has been rewritten to use Tabulated List mode.
1822 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1823 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1827 *** Algebraic simplification mode is now the default.
1828 To restrict to the limited simplifications given by the former
1829 default simplification mode, use `m I'.
1833 *** You can customize the header text that appears above each calendar month.
1834 See the variable `calendar-month-header'.
1836 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1838 *** The calendars produced by cal-html include holidays.
1839 Customize `cal-html-holidays' to change this.
1843 *** The major modes from the parser generators "Bovine" and "Wisent"
1844 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1845 are in `auto-mode-alist', and the corresponding manuals are included.
1849 **** Menu support for the "Configuration" feature. This allows users to
1850 choose the active configuration (such as debug or install) from the menu.
1852 **** New command `ede-set' to interactively set project-local variables.
1854 **** Support for compiling, debugging, and running in "generic" projects.
1856 **** Autoconf editing support for M4 macros with complex arguments.
1858 **** Compilation support for the "linux" project type.
1860 **** "simple" projects have been removed; use "generic" projects instead.
1864 **** Support for parsing #include statements inside a namespace in C/C++.
1866 **** Improved support for 'extern "C"' declarations in C/C++.
1868 **** The ability to ignore more common special C/C++ preprocessor symbols,
1869 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1870 If available, include cdefs.h as an additional source of preprocessor symbols.
1872 **** Improved C/C++ function pointer parsing.
1874 **** In Python, support for converting imports to include file names.
1876 **** Ability to dynamically determine the Python load path.
1878 **** Support for the Python 'WITH' and 'AT' keywords.
1880 **** Improved tooltip completion.
1884 **** The SRecode manual is now included.
1886 **** Tag generation supports constructor/destructor settings and system
1887 include differentiation.
1889 **** Addition of 'Framework' support: Frameworks are specified when a
1890 particular kind of library (such as Android) is needed in a common language
1893 **** Support for nested templates and let variables override based on priority.
1895 **** Support for merging tables from multiple related modes, such as
1896 default -> c++ -> arduino.
1898 ** Compile has a new option `compilation-always-kill'.
1902 *** `custom-reset-button-menu' now defaults to t.
1904 *** Non-option variables are never matched in `customize-apropos' and
1905 `customize-apropos-options' (i.e., the prefix argument does nothing for
1906 these commands now).
1910 *** The variables `term-default-fg-color' and `term-default-bg-color'
1911 are now deprecated in favor of the customizable face `term'.
1913 *** You can customize how to display ANSI terminal colors and styles
1914 by customizing the corresponding `term-color-<COLOR>',
1915 `term-color-underline' and `term-color-bold' faces.
1919 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1921 *** Remote processes are now also supported on remote MS-Windows hosts.
1925 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1926 Previously, this slot stored semicolon-separated attribute-value pairs
1927 appended to some imap URLs, but this is not compatible with RFC 3986.
1928 So now the `filename' slot stores the entire path and query components,
1929 and the `attributes' slot is always nil.
1931 *** New function `url-encode-url' for encoding a URI string.
1932 The `url-retrieve' function now uses this to encode its URL argument,
1933 in case that is not properly encoded.
1935 ** notifications.el supports now version 1.2 of the Notifications API.
1936 The function `notifications-get-capabilities' returns the supported
1939 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1940 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1941 `flymake-warning-bitmap'.
1943 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1944 specifying URL types that should be converted to remote file names at
1945 the FFAP prompt. The default is now '("ftp").
1947 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1948 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1950 ** New option `mouse-avoidance-banish-position' specifies where the
1951 `banish' mouse avoidance setting moves the mouse.
1953 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1954 closing brackets to be aligned with the line of the opening bracket.
1956 ** In Proced mode, new command `proced-renice' renices marked processes.
1958 ** New option `async-shell-command-buffer' specifies the buffer to use
1959 for a new asynchronous `shell-command' when the default output buffer
1960 `*Async Shell Command*' is already in use.
1962 ** SQL mode has a new option `sql-db2-escape-newlines'.
1963 If non-nil, newlines sent to the command interpreter will be escaped
1964 by a backslash. The default does not escape the newlines and assumes
1965 that the sql statement will be terminated by a semicolon.
1967 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1968 (and modes that derive from it), sorts the column at point, or the Nth
1969 column if a numeric prefix argument is given.
1971 ** `which-func-modes' now defaults to t, so Which Function mode, when
1972 enabled, applies to all applicable major modes.
1974 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1977 ** Follow mode no longer works by using advice.
1978 The option `follow-intercept-processes' has been removed.
1980 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1982 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1983 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1984 *** semantic-change-hooks -> semantic-change-functions
1985 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1986 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1987 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1988 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1989 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1990 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1991 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1992 *** rcirc-activity-hooks -> rcirc-activity-functions
1993 *** rcirc-print-hooks -> rcirc-print-functions
1994 *** dbus-event-error-hooks -> dbus-event-error-functions
1995 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1996 *** checkdoc-style-hooks -> checkdoc-style-functions
1997 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1998 *** archive-extract-hooks -> archive-extract-hook
1999 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2000 *** hfy-post-html-hooks -> hfy-post-html-hook
2001 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2002 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2003 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2004 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2006 ** Obsolete packages
2009 In most cases, assoc+member+push+delq work just as well.
2010 And in any case it's just a terrible package: ugly semantics, terrible
2011 inefficiency, and not namespace-clean.
2020 * Incompatible Lisp Changes in Emacs 24.3
2022 ** Docstrings starting with `*' no longer indicate user options.
2023 Only variables defined using `defcustom' are considered user options.
2024 The function `user-variable-p' is now an obsolete alias for
2025 `custom-variable-p'.
2027 ** The return values of `defalias', `defun' and `defmacro' have changed,
2028 and are now undefined. For backwards compatibility, `defun' and
2029 `defmacro' currently return the name of the newly defined
2030 function/macro, but this should not be relied upon.
2032 ** `random' by default now returns a different random sequence in
2033 every Emacs run. Use `(random S)', where S is a string, to set the
2034 random seed to a value based on S, in order to get a repeatable
2035 sequence in later calls.
2037 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2038 that substring is inserted literally even if the LITERAL arg is
2039 non-nil, instead of causing an error to be signaled.
2041 ** `select-window' now always makes the window's buffer current.
2042 It does so even if the window was selected before.
2044 ** The function `x-select-font' can return a font spec, instead of a
2045 font name as a string. Whether it returns a font spec or a font name
2046 depends on the graphical library.
2048 ** `face-spec-set' no longer sets frame-specific attributes when the
2049 third argument is a frame (that usage was obsolete since Emacs 22.2).
2051 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2053 ** The CL package's `get-setf-method' function no longer exists.
2054 Generalized variables are now part of core Emacs Lisp, and implemented
2055 differently to the way cl.el used to do it. It is not possible to
2056 define a compatible replacement for `get-setf-method'. See the file
2057 gv.el for internal details of the new implementation.
2059 ** The arguments of `dbus-register-signal' are no longer just strings,
2060 but keywords or keyword-string pairs. The old argument list will
2061 still be supported for Emacs 24.x.
2063 ** Miscellaneous name changes
2064 Some Lisp symbols have been renamed to correct their spelling,
2065 or to be more consistent with standard Emacs terminology.
2067 *** Renamed functions
2068 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2069 **** inactivate-input-method -> deactivate-input-method
2070 **** quail-inactivate -> quail-deactivate
2071 **** robin-inactivate -> robin-deactivate
2072 **** viper-inactivate-input-method -> viper-deactivate-input-method
2073 **** viper-inactivate-input-method-action ->
2074 viper-deactivate-input-method-action
2075 **** ucs-input-inactivate -> ucs-input-deactivate
2078 The old hooks are still supported for backward compatibility, but they
2079 are deprecated and will be removed eventually.
2080 **** input-method-inactivate-hook -> input-method-deactivate-hook
2081 **** robin-inactivate-hook -> robin-deactivate-hook
2082 **** quail-inactivate-hook -> quail-deactivate-hook
2084 *** Renamed variables
2085 **** follow-deactive-menu -> follow-inactive-menu
2086 **** inactivate-current-input-method-function ->
2087 deactivate-current-input-method-function
2089 ** Some obsolete functions, variables, and faces have been removed:
2090 *** `last-input-char', `last-command-char', `unread-command-char'
2091 *** `facemenu-unlisted-faces'
2092 *** `rmail-decode-mime-charset'
2093 *** `iswitchb-read-buffer'
2094 *** `sc-version', `sc-submit-bug-report'
2095 *** `set-char-table-default'
2096 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2097 *** `compile-internal'
2099 *** `mode-line-inverse-video'
2100 *** `follow-mode-off-hook'
2101 *** `cvs-commit-buffer-require-final-newline'
2102 (use `log-edit-require-final-newline' instead)
2103 *** `cvs-changelog-full-paragraphs'
2104 (use `log-edit-changelog-full-paragraphs' instead)
2105 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2106 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2107 *** `vc-master-templates' (use `vc-handled-backends' instead)
2108 *** `vc-checkout-carefully'
2111 * Lisp Changes in Emacs 24.3
2113 ** CL-style generalized variables are now in core Elisp.
2114 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2115 You can define your own generalized variables using `gv-define-simple-setter',
2116 `gv-define-setter', etc.
2118 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2119 This can significantly speed up execution of non-byte-compiled code,
2120 but can also bump into previously unnoticed cyclic dependencies.
2121 These are generally harmless: they will simply cause the macro calls
2122 to be left for later expansion (as before), but will result in a
2123 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2124 You may wish to restructure your code so this does not happen.
2126 ** New sampling-based Elisp profiler.
2127 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2128 When finished, use M-x profiler-stop. The sampling rate can be based on
2129 CPU time or memory allocations.
2131 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2132 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2134 ** New macros `setq-local' and `defvar-local'.
2136 ** Face underlining can now use a wave.
2138 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2139 of `read-regexp' accepts a string ending with a colon and space, and its
2140 second argument DEFAULTS can be a list of strings accessible via `M-n'
2141 in the minibuffer ahead of other hard-coded useful regexp-related values.
2142 More commands use `read-regexp' now to read their regexp arguments.
2146 *** New function `completion-table-with-quoting' to handle completion
2147 in the presence of quoting, such as file completion in shell buffers.
2149 *** New function `completion-table-subvert' to use an existing completion
2150 table, but with a different prefix.
2154 *** New error type and new function `user-error'.
2155 These do not trigger the debugger.
2157 *** New option `debugger-bury-or-kill', saying what to do with the
2158 debugger buffer when exiting debug.
2160 *** Set `debug-on-message' to enter the debugger when a certain
2161 message is displayed in the echo area. This can be useful when trying
2162 to work out which code is doing something.
2164 *** New var `inhibit-debugger', automatically set to prevent accidental
2165 recursive invocations.
2169 *** New command `fit-frame-to-buffer' adjusts the frame height to
2172 *** The command `fit-window-to-buffer' can adjust the frame height
2173 if the new option `fit-frame-to-buffer' is non-nil.
2175 *** New macro `with-temp-buffer-window', similar to
2176 `with-output-to-temp-buffer'.
2178 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2181 *** New option `switch-to-buffer-preserve-window-point' to restore a
2182 window's point when switching buffers.
2184 *** New display action alist entries `window-height' and `window-width'
2185 specify the size of new windows created by `display-buffer'.
2187 *** New display action alist entry `pop-up-frame-parameters', if
2188 non-nil, specifies frame parameters to give any newly-created frame.
2190 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2191 tells display action functions to avoid changing which frame is
2194 *** New display action alist entry `previous-window', if non-nil,
2195 specifies window to reuse in `display-buffer-in-previous-window'.
2197 *** New display action functions `display-buffer-below-selected',
2198 and `display-buffer-in-previous-window'.
2200 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2201 now accept a third argument to avoid choosing the selected window.
2203 *** Additional values recognized for option `window-combination-limit'.
2205 *** The following variables are obsolete, as they can be replaced by
2206 appropriate entries in the `display-buffer-alist' function introduced
2208 **** `dired-shrink-to-fit'
2209 **** `display-buffer-reuse-frames'
2210 **** `display-buffer-function'
2211 **** `special-display-buffer-names'
2212 **** `special-display-frame-alist'
2213 **** `special-display-function'
2214 **** `special-display-regexps'
2218 *** `current-time-string' no longer requires that its argument's year
2219 must be in the range 1000..9999. It now works with any year supported
2220 by the underlying C implementation.
2222 *** `current-time' now returns extended-format time stamps
2223 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2224 PSEC is typically a multiple of 1000 on current machines. Other
2225 functions that use this format, such as `file-attributes' and
2226 `format-time-string', have been changed accordingly. Old-format time
2227 stamps are still accepted.
2229 *** The format of timers in `timer-list' and `timer-idle-list' is now
2230 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2231 The PSECS slot is new, and uses picosecond resolution. It can be
2232 accessed via the new `timer--psecs' accessor.
2234 *** Last-modified time stamps in undo lists now are of the form
2235 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2239 *** Improved security when handling persistent objects:
2241 **** `eieio-persistent-read' now features optional arguments for specifying
2242 the class to load, as well as a flag stating whether subclasses are allowed;
2243 if provided, other classes will be rejected by the reader. For
2244 compatibility with existing code, if the class is omitted only a
2247 **** New specialized reader for pulling in classes and signaling errors
2248 without evaluation of suspicious code.
2250 **** All slots that contain objects must have a :type. Slots with lists
2251 of objects must use a new type predicate for a list of an object type.
2253 *** Support for `find-function' and similar utilities, through the addition
2254 of filename support to generated symbols.
2256 ** Floating point functions now always return special values like NaN,
2257 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2258 Previously, they returned NaNs on some platforms but signaled errors
2259 on others. The affected functions are acos, asin, tan, exp, expt,
2260 log, log10, sqrt, and mod.
2262 ** New fringe bitmap `exclamation-mark'.
2264 ** Miscellaneous changes to special forms and macros
2266 *** `defun' and `defmacro' are now macros rather than special forms.
2268 *** `kbd' is now a function rather than a macro.
2270 ** Miscellaneous new functions
2272 *** `set-temporary-overlay-map' sets up a temporary keymap that
2273 takes precedence over most other maps for a short while (normally one key).
2275 *** `autoloadp' tests if its argument is an autoloaded object.
2277 *** `autoload-do-load' performs the autoloading operation.
2279 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2281 *** `file-name-base' returns a file name sans directory and extension.
2283 *** `function-get' fetches a function property, following aliases.
2285 *** `posnp' tests if an object is a `posn'.
2287 *** `system-users' returns the user names on the system.
2289 *** `system-groups' returns the group names on the system.
2291 *** `tty-top-frame' returns the topmost frame of a text terminal.
2293 ** The following functions and variables are obsolete:
2294 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2295 *** `buffer-has-markers-at'
2296 *** `macro-declaration-function' (use `macro-declarations-alist')
2297 *** `window-system-version' (provides no useful information)
2298 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2299 *** `query-replace-interactive'
2300 *** `font-list-limit' (has had no effect since Emacs < 23)
2303 * Changes in Emacs 24.3 on Non-Free Operating Systems
2305 ** Cygwin builds can use the native MS Windows user interface.
2306 Pass `--with-w32' to configure. The default remains the X11 interface.
2308 ** Two new functions are available in Cygwin builds:
2309 `cygwin-convert-file-name-from-windows' and
2310 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2311 code to access the Cygwin file-name mapping machinery to convert
2312 between Cygwin and Windows-native file and directory names.
2314 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2315 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2316 `mouse-autoselect-window'.
2318 ** On MS Windows Vista and later Emacs now supports symbolic links.
2320 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2321 support for libxml2, even if its presence is detected.
2323 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2325 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2326 directories to the search path. You must add them yourself if you want them.
2329 * Changes in Emacs 24.2
2331 ** This is mainly a bug-fix release.
2334 * Installation Changes in Emacs 24.1
2336 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2337 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2338 also depend on Gtk+. You can disable them with --without-rsvg and
2341 ** Emacs can be compiled with GnuTLS support.
2342 This happens by default if a suitably recent version of the library is
2343 found at build time. To prevent this, use the configure option
2344 `--without-gnutls'. See below for GnuTLS features.
2346 ** Emacs can be compiled with SELinux support.
2347 This happens by default if a suitably recent version of the library is
2348 found at build time. To prevent this, use the configure option
2349 `--without-selinux'. See below for SELinux features.
2351 ** Emacs can be compiled with ImageMagick support.
2352 This happens by default if a suitably recent version of the library is
2353 found at build time. To prevent this, use the configure option
2354 `--without-imagemagick'. See below for ImageMagick features.
2355 This feature is not available for the Nextstep or MS ports.
2357 ** Emacs can be compiled with libxml2 support.
2358 This happens by default if a suitably recent version of the library is
2359 found at build time. To prevent this, use the configure option
2360 `--without-xml2'. See below for libxml2 features.
2362 ** By default, the installed Info and man pages are compressed.
2363 You can disable this by configuring --without-compress-info.
2365 ** New configure option --with-wide-int.
2366 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2367 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2370 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2371 These provide no new functionality, they just remove the need to edit
2372 lib-src/Makefile by hand in order to use the associated features.
2374 ** New configure option --enable-use-lisp-union-type.
2375 This is only useful for Emacs developers to debug certain types of bugs.
2376 This is not a new feature; only the configure flag is new.
2378 ** The standalone programs digest-doc and sorted-doc are removed.
2379 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2381 ** The standalone program `fakemail' is removed.
2382 If you need it, feedmail.el provides a superset of the functionality.
2385 * Startup Changes in Emacs 24.1
2387 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2388 command line arguments, and the EMACS_UNIBYTE environment variable, no
2389 longer have any effect. (They were declared obsolete in Emacs 23.)
2391 ** New command line option `--no-site-lisp' removes site-lisp directories
2392 from load-path. -Q now implies this. This option does not affect the
2393 EMACSLOADPATH environment variable (and hence has no effect for
2397 * Changes in Emacs 24.1
2401 *** Many packages now use the `completion-at-point' command,
2402 rather than implementing separate completion commands.
2404 *** `completion-at-point' now handles tags and semantic completion.
2406 *** Completion in a non-minibuffer now tries to detect the end of completion
2407 and pops down the *Completions* buffer accordingly.
2409 *** New option `completion-cycle-threshold' allows completion cycling.
2411 *** New option `completion-category-overrides' for overriding the
2412 default completion style in certain circumstances.
2414 *** New completion style `substring'.
2416 *** Completion of buffer names uses `substring' completion by default.
2418 *** The option `widget-complete-field' has been removed.
2422 *** The first time you try sending mail, Emacs asks for a mail method.
2423 This is implemented by a new default for `send-mail-function', which
2424 is `sendmail-query-once'. This offers to use the smtpmail package, or
2425 to use the old defaults relying on external mail facilities
2426 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2427 `mailclient-send-it' on Windows).
2429 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2430 transfers the report to your desktop's preferred mail client, if there
2431 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2434 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2435 and Mail mode changes
2437 ** Emacs server and client changes
2439 *** New option `server-port' specifies the port for TCP Emacs servers.
2441 *** New emacsclient argument -q/--quiet suppresses some status messages.
2443 *** New emacsclient argument --frame-parameters specifies the frame
2444 parameters of any newly-created graphical frame.
2446 *** If emacsclient shuts down due to Emacs signaling an error,
2447 its exit status is 1.
2449 *** New emacsclient argument --parent-id ID.
2450 This opens a client frame in parent X window ID, via XEmbed, similar
2451 to the --parent-id argument to Emacs.
2453 ** Internationalization changes
2455 *** Emacs now supports display and editing of bidirectional text.
2456 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2457 displayed in the correct visual order as expected by users of those
2458 scripts. The display reordering is a "full bidirectionality" class
2459 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2460 with no RTL text should look exactly the same as before.
2462 **** New buffer-local variable `bidi-display-reordering'.
2463 To disable display reordering in a buffer, change this to nil.
2465 **** New buffer-local variable `bidi-paragraph-direction'.
2466 If nil (the default), Emacs determines the base direction of each
2467 paragraph from its text, as specified by the UBA. Setting the value
2468 to `right-to-left' or `left-to-right' forces a base direction on each
2471 Paragraphs with right-to-left base direction are displayed starting at
2472 the right window edge.
2474 *** Enhanced support for characters with no glyphs in available fonts,
2475 or, on text terminals, characters that cannot be encoded by the
2476 terminal coding system. The new option `glyphless-char-display-control'
2477 specifies how to display them: as a hexadecimal code in a box, a thin
2478 1-pixel space, an empty box, etc.
2480 *** New input methods for Farsi and Bulgarian
2481 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2483 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2484 (U+2010 and U+2011).
2486 *** New Hebrew translation of the Emacs Tutorial.
2487 Type `C-u C-h t' to choose it in case your language setup doesn't
2488 automatically select it.
2490 ** An Emacs Lisp package manager is now included.
2491 This is a convenient way to download and install additional packages,
2492 from a package repository at http://elpa.gnu.org.
2494 *** M-x list-packages shows a list of packages, which can be
2495 selected for installation.
2497 *** New command `describe-package', bound to `C-h P'.
2499 *** By default, all installed packages are loaded automatically when
2500 Emacs starts up. To disable this, set `package-enable-at-startup' to
2501 nil. To specify the packages to load, customize `package-load-list'.
2503 ** Custom theme changes
2505 *** New command `M-x customize-themes', which provides a convenient
2506 interface for enabling and disabling Custom themes.
2508 *** New option `custom-theme-load-path' is the load path for themes.
2509 Emacs no longer looks for Custom themes in `load-path'. The default
2510 value of `custom-theme-load-path' says to look for themes in
2511 `custom-theme-directory', followed by a subdirectory of
2512 `data-directory' named "themes/", which contains a small selection of
2513 built-in Custom themes.
2515 *** New option `custom-safe-themes' records known-safe theme files.
2516 If a theme is not in this list, Emacs queries before loading it, and
2517 offers to save the theme to `custom-safe-themes' automatically. By
2518 default, all themes included in Emacs are treated as safe.
2520 ** Improved GTK integration
2522 *** GTK scroll-bars are now placed on the right by default.
2523 The function `set-scroll-bar-mode' can change this.
2525 *** GTK tool bars can have just text, just images or images and text.
2526 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2527 the default is taken from desktop settings.
2529 *** GTK tool bars can be placed on any edge of the frame.
2530 The frame-parameter tool-bar-position controls this. It takes the
2531 values top, left, right or bottom. The Options => Show/Hide menu has
2534 *** The default colors for selected text (the `region' face) are taken
2535 from the GTK theme when Emacs is built with GTK.
2537 *** Emacs uses GTK tooltips by default if built with GTK.
2538 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2540 ** Graphical interface changes
2542 *** On graphical displays, the mode-line no longer ends in dashes.
2543 Also, the first dash (which does not indicate anything) is just
2544 displayed as a space.
2546 *** `menu-bar-select-buffer-function' lets you choose another operation
2547 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2549 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2550 built with Xft. These fonts can be set via X resources, for example:
2551 Emacs.pane.menubar.font: Courier-12
2555 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2556 or if it receives a SIGINT signal in batch mode.
2558 *** `kill-emacs-hook' is now also run in batch mode.
2559 Third-party code which adds to `kill-emacs-hook' should check if they
2560 do the right thing in batch mode.
2562 ** Scrolling changes
2564 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2565 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2566 of buffer at first key-press (instead they move to top/bottom of buffer)
2567 when `scroll-error-top-bottom' is non-nil.
2569 *** New option `scroll-error-top-bottom' (see above).
2571 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2572 scroll a line instead of full screen.
2574 *** New property `scroll-command' should be set on a command's symbol to
2575 define it as a scroll command affected by `scroll-preserve-screen-position'.
2577 *** If you customize `scroll-conservatively' to a value greater than 100,
2578 Emacs will never recenter point in the window when it scrolls due to
2579 cursor motion commands or commands that move point (e.f., `M-g M-g').
2580 Previously, you needed to use `most-positive-fixnum' as the value of
2581 `scroll-conservatively' to achieve the same effect.
2583 *** "Aggressive" scrolling now honors the scroll margins.
2584 If you customize `scroll-up-aggressively' or
2585 `scroll-down-aggressively' and move point off the window, Emacs now
2586 scrolls the window so as to avoid positioning point inside the scroll
2589 ** Basic SELinux support has been added.
2590 This requires Emacs to be linked with libselinux at build time.
2592 *** Emacs preserves the SELinux file context when backing up.
2593 Also, the function `copy-file' has an extra optional argument for
2594 preserving SELinux context, and the return value of `backup-buffer'
2595 now includes the SELinux context.
2597 *** New functions `file-selinux-context' and `set-file-selinux-context'
2598 get and set the SELinux context of a file.
2602 *** `delete-by-moving-to-trash' now only affects commands that specify
2603 trashing. This avoids inadvertently trashing temporary files.
2605 *** Calling `delete-file' or `delete-directory' with a prefix argument
2606 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2608 ** File- and directory-local variable changes
2610 *** You can stop directory local vars from applying to subdirectories.
2611 Add an element (subdirs . nil) to the alist portion of any variables
2612 settings to indicate that the section should not apply to
2615 *** Directory local variables can apply to some file-less buffers.
2616 Affected modes include dired, vc-dir, and log-edit. For example,
2617 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2618 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2619 `hack-dir-local-variables-non-file-buffer' to support this.
2621 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2622 Instead, use "eval: (minor-mode 1)".
2624 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2625 to `inhibit-local-variables-regexps'. As the name suggests, it now
2626 applies to ALL file local variables, not just -*- lines. The
2627 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2632 *** The `quit-window' command now restores the last buffer displayed
2633 in the quitted window.
2635 *** Resizing an Emacs frame now preserves proportional window sizes,
2636 modulo restrictions like window minimum sizes and fixed-size windows.
2638 *** The behavior of `display-buffer' is now customizable in detail.
2640 **** New option `display-buffer-base-action' specifies a list of
2641 user-determined display "actions" (functions and optional arguments
2642 for choosing the displaying window).
2644 This takes precedence over the default display action, which is
2645 specified by `display-buffer-fallback-action'.
2647 **** New option `display-buffer-alist' maps buffer name regexps to
2648 display actions, taking precedence over `display-buffer-base-action'.
2650 *** New option `window-combination-limit'.
2651 The new option `window-combination-limit' allows to return the space
2652 obtained for resizing or creating a window more reliably to the window
2653 from which such space was obtained.
2655 *** New option `window-combination-resize'.
2656 The new option `window-combination-resize' allows to split a window that
2657 otherwise cannot be split because it's too small by stealing space from
2658 other windows in the same combination. Subsequent resizing or deletion
2659 of the window will resize all windows in the same combination as well.
2661 *** New option `frame-auto-hide-function' lets you choose between
2662 iconifying or deleting a frame when burying a buffer in a dedicated
2663 frame, or quitting a window showing a buffer in a frame of its own.
2665 *** New commands `maximize-window' and `minimize-window'.
2666 These maximize and minimize the size of a window within its frame.
2668 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2669 These functions allow to navigate through the live buffers that have
2670 been shown in a specific window.
2672 ** Minibuffer changes
2674 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2675 This is handy for minibuffer-only frames, and is also used for the feature
2676 where mouse-1 pops up *Messages*"', which can now easily be changed.
2678 *** Minibuffers set `truncate-lines' to nil.
2679 If you want to change the value to something else, you could use
2680 for example `minibuffer-setup-hook'.
2682 ** `auto-mode-case-fold' is now enabled by default.
2684 ** `backup-by-copying-when-mismatch' now defaults to t.
2686 ** New basic faces `error', `warning', `success'.
2687 These are used to highlight text indicating failure, caution or
2688 successful operation.
2690 ** New option `list-colors-sort' defines the color sort order
2691 for `list-colors-display'.
2693 ** The variable `focus-follows-mouse' now always defaults to nil.
2696 * Editing Changes in Emacs 24.1
2700 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2701 `isearch-yank-line'.
2703 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2704 `isearch-yank-kill'.
2706 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2708 ** New commands `count-words-region' and `count-words'.
2710 *** M-= is bound to `count-words-region', not `count-lines-region'.
2711 The `count-words-region' command, when called interactively, reports
2712 the number of lines, words, and characters in the region. It is a
2713 superset of the old `count-lines-region', which is now an obsolete
2716 ** The command `just-one-space' (M-SPC), if given a negative argument,
2717 also deletes newlines around point.
2721 *** New option `delete-active-region'.
2722 If non-nil, [delete] and DEL delete the region if it is active and no
2723 prefix argument is given. If set to `kill', those commands kill
2726 *** New command `delete-forward-char', bound to [delete].
2727 This is meant for interactive use, and obeys `delete-active-region'.
2728 The command `delete-char' does not obey `delete-active-region'.
2730 *** `delete-backward-char' is now a Lisp function.
2731 Apart from obeying `delete-active-region', its behavior is unchanged.
2732 However, the byte compiler now warns if it is called from Lisp; Lisp
2733 callers should use delete-char with a negative argument instead.
2735 *** The option `mouse-region-delete-keys' has been deleted.
2737 ** Selection changes.
2739 The default handling of clipboard and primary selections has been
2740 changed to conform with modern X applications. In short, most
2741 commands for killing and yanking text now use the clipboard, while
2742 mouse commands use the primary selection.
2744 In the following, we provide a list of these changes, followed by a
2745 list of steps to get the old behavior back if you prefer that.
2747 *** `select-active-regions' now defaults to t.
2748 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2749 the kill ring. The selected text is put in the primary selection, if
2750 the system possesses a separate primary selection facility (e.g. X).
2752 **** `select-active-regions' also accepts a new value, `only'.
2753 This means to only set the primary selection for temporarily active
2754 regions (usually made by mouse-dragging or shift-selection);
2755 "ordinary" active regions, such as those made with C-SPC followed by
2756 point motion, do not alter the primary selection.
2758 **** `mouse-drag-copy-region' now defaults to nil.
2760 *** mouse-2 is now bound to `mouse-yank-primary'.
2761 This pastes from the primary selection, ignoring the kill-ring.
2762 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2764 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2766 *** `x-select-enable-primary' now defaults to nil.
2767 Thus, commands that kill text or copy it to the kill-ring (such as
2768 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2770 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2771 exactly equivalent to M-w, C-w, and C-y respectively.
2773 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2774 non-nil by default, as Windows does not support the primary selection
2775 between applications.
2777 *** To return to the previous behavior, do the following:
2779 **** Change `select-active-regions' to nil.
2780 **** Change `mouse-drag-copy-region' to t.
2781 **** Change `x-select-enable-primary' to t (on X only).
2782 **** Change `x-select-enable-clipboard' to nil.
2783 **** Bind `mouse-yank-at-click' to mouse-2.
2785 *** Support for X cut buffers has been removed.
2787 *** X clipboard managers are now supported.
2788 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2790 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2791 in the current rectangle. With a prefix argument, this prompts for a
2792 number to count from and for a format string.
2794 ** `redisplay-dont-pause' now defaults to t.
2795 This makes Emacs feel more responsive to editing commands that arrive
2796 at high rate, e.g. if you lean on some key, because stopping redisplay
2797 in the middle (when this variable is nil) forces more expensive
2798 updates later on, and Emacs appears to be unable to keep up.
2800 ** The behavior of <TAB> for active regions in Text mode has changed.
2801 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2802 when the region is active causes Emacs to indent all the lines in the
2803 region, aligning them with the line previous to the first line in the
2804 region (or with the left margin if there is no previous line).
2806 ** When `occur' is called with a prefix argument, matching strings are
2807 collected into the `*Occur*' buffer without line numbers. If there
2808 are parenthesized subexpressions in the specified regexp, `occur'
2809 reads replacement text that may contain \\& and \\N whose convention
2810 follows `replace-match'.
2813 * Changes in Specialized Modes and Packages in Emacs 24.1
2815 ** Archive Mode has basic support for browsing and updating 7z archives.
2819 *** BibTeX mode now supports biblatex.
2820 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2821 `bibtex-entry-field-alist' is now an obsolete alias for
2822 `bibtex-BibTeX-entry-alist'.
2824 *** New command `bibtex-search-entries', bound to C-c C-a.
2826 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2828 *** New variable `bibtex-search-entry-globally'.
2832 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2834 *** The default browser used by the package is now the "xdg-open" program,
2835 on platforms that support it. This calls your desktop's preferred browser.
2839 *** Support for musical notes.
2841 *** Support for logarithmic units.
2843 *** No longer uses the tex prefix for TeX specific unit names when
2844 using TeX or LaTeX mode.
2846 *** New option to highlight selections using faces.
2848 *** `calc-histogram' has the option of using a vector to determine the bins.
2850 *** New "O" option prefix.
2852 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2854 ** Calendar, Diary, and Appt
2856 *** Diary entries can contain non-printing "comments".
2857 See the variable `diary-comment-start'.
2859 *** Appointments can specify their individual warning times.
2860 See the variable `appt-warning-time-regexp'.
2862 *** The function specified by `appt-disp-window-function' may be passed
2863 lists of arguments if multiple appointments are due at similar times.
2864 If you are using a custom function for this, you should update it.
2866 *** New function `diary-hebrew-birthday'.
2868 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2869 may no longer be nil, but must all be strings.
2871 *** The obsolete (since Emacs 22.1) method of enabling the appt
2872 package by adding `appt-make-list' to `diary-hook' has been removed.
2873 Use `appt-activate' instead.
2875 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2876 appt-issue-message (use the function appt-activate)
2877 appt-visible/appt-msg-window (use the variable appt-display-format)
2879 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2880 view-diary-entries, list-diary-entries, show-all-diary-entries
2884 *** New feature to "guess" the style in an existing buffer.
2885 The main entry point is M-x c-guess.
2887 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2889 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2890 Thus C-M-a will, by default, go to the beginning of the immediate function,
2893 *** "Macros with semicolons" can be registered for correct indentation.
2894 Where such a macro ends a line (no semicolon) the next statement is no longer
2895 parsed as a statement continuation.
2897 ** Comint and modes derived from it use the standard completion code.
2901 *** Compilation mode can be used without Font Lock mode.
2902 `compilation-parse-errors-function' is now obsolete.
2904 *** New variable `compilation-filter-start', which is bound while
2905 `compilation-filter-hook' runs. It records the start position of the
2906 text inserted by `compilation-filter'.
2908 *** `compilation-error-screen-columns' and `compilation-first-column'
2909 are obeyed in the editing buffer. So programming language modes can
2910 set them, whereas previously only the value in the *Compilation*
2915 *** Customize buffers now contain a search field.
2916 The search is performed using `customize-apropos'.
2917 To turn off the search field, set `custom-search-field' to nil.
2919 *** Options in customize group buffers start out hidden if not customized.
2920 Use the arrow to the left of the option name to toggle visibility.
2922 *** custom-buffer-sort-alphabetically now defaults to t.
2924 *** The color widget now has a "Choose" button, which allows you to
2925 choose a color via `list-colors-display'.
2929 *** It is now possible to access buses other than the default system
2932 *** The `dbus-register-method' and `dbus-register-property' functions
2933 optionally do not register names.
2935 *** The new function `dbus-register-service' registers a known service
2936 name on a D-Bus without also registering a property or a method.
2940 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2941 if called with a prefix argument, read a file name from the minibuffer
2942 instead of using the current buffer.
2944 *** The "dired local variables" feature of Dired-x is obsolete.
2945 The standard directory local variables feature replaces it.
2949 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2950 controlling attempts to autojoin a channel.
2952 *** New variable `erc-coding-system-precedence': If we use `undecided'
2953 as the server coding system, this variable will then be consulted.
2954 The default is to decode strings that can be decoded as utf-8 as
2955 utf-8, and do the normal `undecided' decoding for the rest.
2959 *** The default value of `eshell-directory-name' has changed
2960 to be an "eshell" directory in `user-emacs-directory'.
2961 The old "~/.eshell/" directory is still used if it exists, though.
2965 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2966 It now supports multithread non-stop debugging and simultaneous
2967 debugging of several threads.
2971 *** RET (`image-toggle-animation') toggles animation, if applicable.
2972 Animation plays once, unless the option `image-animate-loop' is non-nil.
2976 *** New command M-x info-display-manual displays a named Info manual.
2977 If that manual is already visited in some Info buffer, it displays
2978 that buffer. (This is handy if you have many manuals in many *info*
2979 buffers, and don't remember the name of the buffer visiting the manual
2980 you want to consult.) Otherwise, it loads and displays the manual.
2982 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2983 This is for compatibility with the stand-alone Info reader program,
2984 and also because `Info-edit' is a rarely used command that is disabled
2987 ** Mail mode changes (not Message mode)
2989 *** New command M-x mail-add-attachment for adding MIME attachments
2991 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2992 (Its name is misleading, since it has nothing to do with MIME
2993 attachments.) The old name is now an obsolete alias to the new name.
2995 ** MH-E has been updated to MH-E version 8.3.1.
2996 See MH-E-NEWS for details.
2998 ** Modula-2 mode provides auto-indentation.
3000 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3002 ** nXML mode no longer binds C-RET to `nxml-complete'.
3003 Completion is now performed via `completion-at-point', bound to C-M-i
3004 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3005 default), this performs tag completion.
3007 ** Org mode has been updated to version 7.8.09.
3008 See ORG-NEWS for details.
3010 ** Prolog mode has been completely revamped, with lots of additional
3011 functionality such as more intelligent indentation, electricity,
3012 support for more variants, including Mercury, and a lot more.
3016 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3017 in the Rmail incoming message.
3019 *** The variable `rmail-message-filter' no longer has any effect.
3020 This change was made in Emacs 23.1 but was not advertised at the time.
3021 Try using `rmail-show-message-hook' instead.
3025 *** M-x shell prompts for the shell path name if the default directory
3026 is a remote file name and neither the environment variable $ESHELL nor
3027 the variable `explicit-shell-file-name' is set.
3029 *** TAB is now bound to the standard `completion-at-point' command,
3030 which now implements the pcomplete rules for shell command completion.
3034 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3035 if the mail server supports them. This uses either built-in GnuTLS
3036 support, or the starttls.el library. Customize `smtpmail-stream-type'
3039 *** The variable `smtpmail-auth-credentials' has been removed.
3040 By default, the information is now stored in the file ~/.authinfo.
3041 This was the default value of smtpmail-auth-credentials. If you had
3042 customized smtpmail-auth-credentials to a list of user names and
3043 passwords, those settings are not used. During your first connection
3044 to the smtp server, Emacs will prompt for the user name and password,
3045 and offer to save them to ~/.authinfo. Or you can manually copy the
3046 credentials to ~/.authinfo. For example, if you had
3048 (setq smtpmail-auth-credentials
3049 '(("mail.example.org" 25 "jim" "s!cret")))
3051 then the equivalent line in ~/.authinfo would be
3053 machine mail.example.org port 25 login jim password s!cret
3055 See the auth-source manual for more information, e.g. on encrypting
3056 the credentials file.
3058 *** The variable `smtpmail-starttls-credentials' has been removed.
3059 If you had that set, you need to put
3061 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3063 in your ~/.authinfo file instead.
3065 *** SMTPmail defaults to using the address in the From: header as the
3066 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3067 to the address you wish to use instead.
3071 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3072 and `sql-oracle-scan-on'.
3074 *** New options controlling prompting for login parameters.
3075 Each supported product has a custom variable `sql-*-login-params',
3076 which is a list of the parameters to be prompted for before a
3077 connection is established.
3079 *** The command `sql-product-interactive' now takes a prefix argument,
3080 which causes it to prompt for an SQL product.
3082 *** Product-specific SQL interactive commands now take prefix arguments.
3083 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3084 given a prefix argument, prompt for a name for the SQL interactive
3085 buffer. This reduces the need for calling `sql-rename-buffer'.
3087 *** SQL interactive modes suppress command continuation prompts, and
3088 replace tabs with spaces. The first change impacts multiple line SQL
3089 statements entered with C-j between each line, statements yanked into
3090 the buffer and statements sent with `sql-send-*' functions. The
3091 second prevents the MySQL and Postgres interpreters from listing
3092 object name completions when sent text via `sql-send-*' functions.
3094 *** New command `sql-connect' starts a predefined SQLi session,
3095 using the login parameters from `sql-connection-alist'.
3097 *** New "Save Connection" menu item in SQLi buffers.
3098 This gathers the login params specified for the SQLi session, if it
3099 was not started by a connection, and saves them as a new connection.
3101 *** New commands for listing database objects and details:
3102 sql-list-all and sql-list-table.
3104 *** An API for manipulating SQL product definitions has been added.
3108 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3112 *** New inline access method "ksu" (kerberized su).
3114 *** The following access methods are discontinued: "ssh1_old",
3115 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3117 *** The user option `remote-file-name-inhibit-cache' controls whether
3118 remote file attributes are cached for better performance.
3120 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3121 default value to "".
3123 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3124 for remote machines which support SELinux.
3126 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3127 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3128 the degree of parallelism.
3130 ** VC and related modes
3132 *** Support for pulling on distributed version control systems.
3133 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3134 supported (currently with Bzr, Git, and Mercurial), to update the
3135 current branch and working tree. A prefix argument means to prompt
3136 the user for specifics, e.g. a pull location.
3138 *** `vc-update' is now an alias for `vc-pull'.
3140 *** Support for merging on distributed version control systems.
3141 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3142 is supported (currently with Bzr, Git, and Mercurial), to merge
3143 changes from another branch into the current one. It prompts for
3144 specifics, e.g. a merge source.
3146 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3147 shows a diff while querying the user. It defaults to t.
3149 *** Log entries in some Log View buffers can be toggled to display a
3150 longer description by typing RET (log-view-toggle-entry-display).
3151 This is currently supported for Bzr, Git, and Mercurial (to support
3152 another backend, define a `log-view-expanded-log-entry-function').
3153 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3154 use this to display the full log entry for the revision at point.
3156 *** New command `vc-ediff' allows visual comparison of two revisions
3157 of a file similar to `vc-diff', but using ediff backend.
3159 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3160 this was not advertised at the time.
3162 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3163 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3164 this was not advertised at the time.
3170 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3172 *** partial-completion-mode (complete.el) is obsolete.
3173 You can get a comparable behavior with:
3174 (setq completion-styles '(partial-completion initials))
3175 (setq completion-pcm-complete-word-inserts-delimiters t)
3177 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3179 *** pgg is obsolete (use EasyPG instead).
3181 *** sregex.el is obsolete, since rx.el is a strict superset.
3183 *** s-region.el and pc-select.el are obsolete.
3184 They are superseded by shift-select-mode, enabled by default since 23.1.
3186 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3190 *** The Landmark game is now invoked with `landmark', not `lm'.
3191 Its functions and variables have been similarly renamed.
3193 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3194 (This interfered with cua-mode.)
3196 *** f90.el has some support for Fortran 2008 syntax.
3198 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3200 *** New command `nato-region' converts text to NATO phonetic alphabet.
3203 * New Modes and Packages in Emacs 24.1
3205 ** Occur Edit mode applies edits made in *Occur* buffers to the
3206 original buffers. It is bound to "e" in Occur mode.
3208 ** New global minor mode electric-pair-mode.
3209 When enabled, typing an open parenthesis automatically inserts the
3210 matching closing one.
3212 ** New global minor mode electric-indent-mode.
3213 When enabled, typing certain characters triggers reindentation.
3214 Major modes wishing to use this can set electric-indent-chars or
3215 electric-indent-functions.
3217 ** New global minor mode electric-layout-mode.
3218 When enabled, typing certain characters automatically inserts newlines.
3219 Major modes wishing to use this can set electric-layout-rules.
3221 ** tabulated-list.el provides a generic major mode for tabulated data,
3222 from which other modes can be derived.
3224 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3226 ** secrets.el is an implementation of the Secret Service API, an
3227 interface to password managers like GNOME Keyring or KDE Wallet. The
3228 Secret Service API requires D-Bus for communication. The command
3229 `secrets-show-secrets' offers a buffer with a visualization of the
3232 ** notifications.el provides an implementation of the Desktop
3233 Notifications API. It requires D-Bus for communication.
3235 ** soap-client.el supports access to SOAP web services from Emacs.
3236 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3238 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3240 ** New emacs-lock.el package.
3241 The previous version has been moved to obsolete/old-emacs-lock.el.
3242 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3243 against exiting Emacs and killing the buffer can be set separately.
3244 The mechanism for automatically turning off protection for buffers
3245 with dead inferior processes has been generalized.
3248 * Incompatible Lisp Changes in Emacs 24.1
3250 ** Passing a nil argument to a minor mode function call now ENABLES
3251 the minor mode unconditionally. This is so that you can write e.g.
3253 (add-hook 'text-mode-hook 'foo-mode)
3255 to enable foo-mode in Text mode buffers, removing the need for
3256 `turn-on-foo-mode' style functions. This affects all mode commands
3257 defined by `define-minor-mode'. If called interactively, the mode
3258 command still toggles the minor mode.
3260 ** The return value of `backup-buffer' has changed.
3261 It is now a list of three elements, where the second element is a list
3262 describing the original file's SELinux context. If Emacs or the
3263 system lacks SELinux support, the context list is (nil nil nil nil).
3264 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3266 ** `char-direction-table' and the `char-direction' function were deleted.
3267 They were buggy and inferior to the new support of bidirectional
3268 editing introduced in Emacs 24. If you need the bidirectional
3269 properties of a character, use `get-char-code-property' with the last
3270 argument `bidi-class'.
3272 ** `copy-directory' now copies the source directory as a subdirectory
3273 of the target directory, if the latter is an existing directory. The
3274 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3275 the contents directly into a pre-existing target directory.
3277 ** For mouse click input events in the text area, the Y pixel
3278 coordinate in the POSITION list now counts from the top of the text
3279 area, excluding any header line. Previously, it counted from the top
3282 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3283 been further reduced. Now a backquote not followed by a space is
3284 always treated as a "new-style" backquote. Please remove all
3285 "old-style" backquotes from your code. If your code uses backquotes
3286 as documented in the Elisp manual, and compiles without warning, then
3287 you have nothing to do in this regard. Code not following the
3288 appropriate conventions may fail to compile.
3290 The most common cause of trouble seems to be an old-style backquote
3291 followed by a newline. Another cause of trouble is vector notation
3292 for key sequence notation: instead of [(control ,)] and [(control ')],
3293 you should write [(control ?,)] and [(control ?')], which will work in
3296 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3297 was not advertised at the time. The function `custom-initialize-delay'
3298 replaced all known uses.
3300 ** `view-buffer' now treats special mode-class in the same way that
3301 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3302 major mode is special).
3304 ** Menu and tool bar changes
3306 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3307 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3308 With these alist entries omitted, `make-frame' checks the value of the
3309 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3310 a menu-bar or tool-bar, respectively. If the alist entries are added,
3311 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3313 *** The menu bar bindings's caches are not used any more.
3314 Use (where-is-internal <def> nil t) instead.
3316 ** Regions created by mouse dragging are now normal active regions,
3317 similar to those created by shift-selection (see Selection changes
3318 above). In previous Emacs versions, these regions were delineated by
3319 `mouse-drag-overlay'; that variable has been removed.
3321 ** The fourth argument of `filter-buffer-substring' has been removed.
3322 If you want to remove text properties from the final result, simply
3323 pass the result through substring-no-properties.
3325 ** cl.el no longer provides `cl-19'.
3327 ** The following obsolete functions and aliases have been removed
3328 (the appropriate new function is given in parentheses; "not needed"
3329 means you can just remove all calls to the function in question):
3331 *** `comint-kill-output' (`comint-delete-output')
3332 *** `decompose-composite-char' (`char-to-string')
3333 *** `outline-visible' (`outline-invisible-p')
3334 *** `internal-find-face' (`facep')
3335 *** `internal-get-face' (`facep and check-face')
3336 *** `frame-update-faces' (not needed)
3337 *** `frame-update-face-colors' (`frame-set-background-mode')
3338 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3339 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3340 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3341 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3342 *** `x-make-font-unbold' (`make-face-unbold')
3343 *** `x-make-font-unitalic' (`make-face-unitalic')
3344 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3345 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3346 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3347 *** `char-bytes' (== 1)
3348 *** `isearch-return-char' (`isearch-printing-char')
3349 *** `make-local-hook' (not needed)
3350 *** `set-screen-height' (`set-frame-height')
3351 *** `set-screen-width' (`set-frame-width')
3353 ** The following obsolete variables and varaliases have been removed
3354 (the appropriate new variable is given in parentheses):
3356 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3357 *** `vc-header-alist' (`vc-BACKEND-header')
3358 *** `directory-sep-char' (== ?/)
3359 *** `font-lock-defaults-alist' (`font-lock-defaults')
3360 *** `e' (`float-e').
3362 ** The following obsolete files were removed:
3363 sc.el, x-menu.el, rnews.el, rnewspost.el
3365 ** The format of the finder-inf.el file has changed, since the Finder
3366 mechanism is now based on the package system. The variable
3367 `finder-package-info' is replaced by `package--builtins' and
3368 `finder-keywords-hash'.
3370 ** When generating autoloads, `update-directory-autoloads' no longer
3371 assumes every inspected file is in your `load-path'. It instead
3372 generates relative names according to the current `load-path'.
3375 * Lisp Changes in Emacs 24.1
3377 ** Code can now use lexical scoping by default instead of dynamic scoping.
3378 The `lexical-binding' variable enables lexical scoping for local
3379 variables. It is typically set via a file-local variable in the first
3380 line of the file, in which case it applies to all the code in that
3383 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3384 binding instead of the old dynamic binding mode.
3386 *** Lexically scoped interpreted functions are represented with a new form
3387 of function value which looks like (closure ENV ARGS &rest BODY).
3389 *** New macro `letrec' to define recursive local functions.
3391 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3392 So do `defcustom' and other forms that call `defvar' as a subroutine.
3394 *** New function `special-variable-p' to check whether a variable is
3395 declared as dynamically bound.
3397 *** The form ((lambda ...) ...) is deprecated.
3399 ** An Emacs Lisp testing tool is now included.
3400 Emacs Lisp developers can use this tool to write automated tests for
3401 their code. See the ERT info manual for details.
3403 ** Changes for bidirectional display and editing
3405 *** New function `current-bidi-paragraph-direction'.
3406 This returns the base direction of the paragraph at point.
3408 *** New function `bidi-string-mark-left-to-right'.
3409 Given a string containing characters from right-to-left scripts, this
3410 function returns another string which can be safely inserted into a
3411 buffer, such that any following text will be always displayed to the
3412 right of that string. (This works by appending an invisible Unicode
3413 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3415 This is useful when the buffer has overall left-to-right paragraph
3416 direction and you need to insert a string whose contents are not known
3417 in advance, without disrupting the layout of the line.
3421 *** Window tree functions are accessible in Elisp.
3422 Functions are provided to return the parent, siblings or child windows
3423 of any window including internal windows (windows not associated with a
3424 buffer) in the window tree.
3426 **** New function `window-valid-p' gives non-nil for live and internal
3429 **** Window manipulation can deal with internal windows.
3430 Many window handling functions like `split-window', `delete-window', or
3431 `delete-other-windows' as well as the window resizing functions can now
3432 act on any window including internal ones.
3434 *** window-total-height/-width vs window-body-height/-width.
3435 The function `window-height' has been renamed to `window-total-height'
3436 and `window-width' has been renamed to `window-body-width'. The old
3437 names are provided as aliases. Two new functions `window-total-width'
3438 and `window-body-height' are provided.
3440 *** Window parameters specific to window handling functions.
3441 For each window you can specify a parameter to override the default
3442 behavior of a number of functions like `split-window', `delete-window'
3443 and `delete-other-windows'. The variable `ignore-window-parameters'
3444 allows to ignore processing such parameters.
3446 *** New semantics of third argument of `split-window'.
3447 The third argument of `split-window' has been renamed to SIDE and can be
3448 set to any of the values 'below, 'right, 'above, or 'left to make the
3449 new window appear on the corresponding side of the window that shall be
3450 split. Any other value of SIDE will cause `split-window' to split the
3451 window into two side-by-side windows as before.
3453 *** Window resizing functions.
3454 A new standard function for resizing windows called `window-resize' has
3455 been introduced. This and all other functions for resizing windows no
3456 longer delete any windows when they become too small.
3458 *** Deleting the selected window now selects the most recently selected
3459 live window on that frame instead.
3461 *** `adjust-window-trailing-edge' adjustments.
3462 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3463 is able to resize other windows if a window adjacent to the trailing
3464 edge cannot be shrunk any more. This makes its behavior more similar to
3465 that of Emacs 21 without compromising, however, its inability to delete
3466 windows which was introduced in Emacs 22.
3468 *** Window-local buffer lists.
3469 Windows now have local buffer lists. This means that removing a buffer
3470 from display in a window will preferably show the buffer previously
3471 shown in that window with its previous window-start and window-point
3472 positions. This also means that the same buffer may be automatically
3473 shown twice even if it already appears in another window.
3475 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3476 which if non-nil requires the buffer to be displayed in the currently
3477 selected window, signaling an error otherwise. If nil, another window
3478 can be used, e.g. if the selected one is strongly dedicated.
3480 *** `split-window-vertically' and `split-window-horizontally' renamed
3481 to `split-window-below' and `split-window-right' respectively.
3482 The old names are kept as aliases.
3486 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3487 named ACTION, and takes a display action of the same form as
3488 `display-buffer-base-action' (see Changes, above). A non-nil,
3489 non-list value is treated specially, as the old meaning.
3491 **** New variable `display-buffer-overriding-action'.
3493 **** The procedure of `display-buffer' etc. to choose a window is
3494 determined by combining `display-buffer-overriding-action',
3495 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3496 and `display-buffer-fallback-action'. The second and fourth of these
3497 are user-customizable variables.
3499 See the docstring of `display-buffer' for details.
3501 *** New functions `window-state-get' and `window-state-put'.
3502 These functions allow to save and restore the state of an arbitrary
3503 frame or window as an Elisp object.
3507 *** New variable `completion-extra-properties' used to specify extra
3508 properties of the current completion:
3509 - :annotate-function, same as the old completion-annotate-function.
3510 - :exit-function, function to call after completion took place.
3512 *** Functions on `completion-at-point-functions' can return any of the
3513 properties valid for `completion-extra-properties'.
3515 *** `completion-annotate-function' is obsolete.
3517 *** New `metadata' method for completion tables. The metadata thus returned
3518 can specify various details of the data returned by `all-completions':
3519 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3520 used to select a style in completion-category-overrides.
3521 - `annotation-function' to add annotations in *Completions*.
3522 - `display-sort-function' to specify how to sort entries in *Completions*.
3523 - `cycle-sort-function' to specify how to sort entries when cycling.
3525 *** `minibuffer-local-filename-must-match-map' is not used any more.
3526 Instead, the bindings in `minibuffer-local-filename-completion-map'
3527 are combined with `minibuffer-local-must-match-map'.
3529 *** New variable `completing-read-function' allows overriding the
3530 behavior of `completing-read'.
3532 ** `glyphless-char-display' can now distinguish between graphical and
3533 text terminal display, via a char-table entry that is a cons cell.
3535 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3536 Instead, the offending function is removed.
3540 *** New function `run-hook-wrapped' for running an abnormal hook by
3541 passing the hook functions as arguments to a "wrapping" function.
3542 Like `run-hook-with-args-until-success', it stops at the first
3543 non-nil return value.
3545 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3546 set of "wrapping" filters, similar to around advice.
3547 (A version of this macro was actually added in Emacs 23.2 but was not
3548 advertised at the time.)
3552 *** New macro `condition-case-unless-debug' (this was actually added in
3553 Emacs 23.1 as condition-case-no-debug, but not advertised)
3555 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3557 *** Variable `stack-trace-on-error' removed.
3559 *** The debugger can now "continue" from an error, which means it will
3560 jump to the error handler as if the debugger had not been invoked
3561 instead of jumping all the way to the top-level.
3563 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3564 This can be useful when `inhibit-quit' is set.
3566 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3567 named Emacs server instances.
3569 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3570 to redirect STDOUT to a file.
3572 ** The function `format-time-string' now supports the %N directive,
3573 for higher-resolution time stamps.
3575 ** New input reading functions
3577 *** New function `read-char-choice' reads a restricted set of
3578 characters, discarding any inputs not inside the set.
3580 *** The command `read-color' now requires a match for a color name
3581 or RGB triplet, instead of signaling an error if the user provides
3584 **** `facemenu-read-color' is now an alias for `read-color'.
3586 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3587 The variable is now used to load all kind of supported dynamic libraries,
3588 not just image libraries. The previous name is still available as an
3591 ** Syntax parsing changes
3593 *** New variable `syntax-propertize-function'.
3594 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3595 This allows syntax-table properties to be set independently from font-lock:
3596 just call syntax-propertize to make sure the text is propertized.
3597 Together with this new variable come a new hook
3598 syntax-propertize-extend-region-functions, as well as two helper functions:
3599 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3600 as-is; and syntax-propertize-rules which provides a new way to specify
3603 *** Syntax tables support a new "comment style c" additionally to style b.
3605 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3607 ** frame-local variables cannot be let-bound any more.
3609 ** Major and minor mode changes
3611 *** `set-auto-mode' now respects mode: local variables at the end of files,
3612 as well as those in the -*- line.
3614 *** `prog-mode' is a new major mode from which programming modes
3617 **** `prog-mode-hook' can be used to enable features for programming
3618 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3619 on-the-fly spell checking for comments and strings.
3621 *** New hook `change-major-mode-after-body-hook', run by
3622 `run-mode-hooks' just before any other mode hooks.
3624 *** Enabled globalized minor modes can be disabled in specific major modes.
3625 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3626 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3628 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3630 ** File-handling changes
3632 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3633 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3634 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3635 argument is supplied (see Trash changes, above).
3637 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3639 ** Tool-bars can display separators.
3640 Tool-bar separators are handled like menu separators in menu-bar maps,
3641 i.e. via menu entries of the form `(menu-item "--")'.
3645 *** Animated images support (currently animated gifs only).
3647 **** `image-animated-p' returns non-nil if an image can be animated.
3649 **** `image-animate' animates a supplied image spec.
3651 **** `image-animate-timer' returns the timer object for an image that
3654 *** `image-extension-data' has been renamed to `image-metadata'.
3655 The old name is an obsolete alias to the new one.
3657 *** Image mode can view any image type that ImageMagick supports.
3658 This requires Emacs to be built with ImageMagick support.
3660 **** New function `imagemagick-types', defined if ImageMagick support
3661 is enabled, returns a list of image file extensions that your
3662 ImageMagick installation supports.
3664 **** New function `imagemagick-register-types' enables ImageMagick
3665 image types in Image mode and in `create-image' and other helper
3668 **** New option `imagemagick-types-inhibit' excludes certain
3669 ImageMagick image types from `imagemagick-register-types'.
3671 **** With ImageMagick support, there are extra Image mode commands to
3672 resize and rotate images: `image-transform-fit-to-height',
3673 `image-transform-fit-to-width', `image-transform-set-rotation', and
3674 `image-transform-set-scale'.
3676 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3677 passes it to the mail user agent function. This argument specifies an
3678 action for returning to the caller after finishing with the mail. For
3679 example, this is used by Rmail to optionally delete a mail window.
3681 ** XML and HTML parsing
3682 If Emacs is compiled with libxml2 support, there are two new
3683 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3684 and `libxml-parse-xml-region' (which parses XML). Both return an
3685 Emacs Lisp parse tree.
3687 ** Networking and encryption changes
3689 *** `open-network-stream' can now be used to open an encrypted stream.
3690 It now accepts an optional `:type' parameter for initiating a TLS
3691 connection, directly or via STARTTLS. To do STARTTLS, additional
3692 parameters (`:end-of-command', `:success', `:capabilities-command')
3693 must also be supplied.
3695 *** New library gnutls.el.
3696 The new function `gnutls-available-p' returns non-nil if Emacs is
3697 built with GnuTLS support. The main entry points are
3698 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3699 these functions through `open-network-stream', because that can
3700 upgrade connections through STARTTLS opportunistically or use plain
3701 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3704 *** New primitive `secure-hash' that supports many secure hash algorithms:
3705 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3706 sha1.el has been removed. The `sha1' feature is provided by default.
3710 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3712 ** Progress reporters can now "spin".
3713 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3714 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3715 time you call `progress-reporter-update' on that progress reporter,
3716 with a nil or omitted VALUE argument, the reporter message is
3717 displayed with a "spinning bar".
3719 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3720 being reverted, even if the buffer has a local `revert-buffer-function'.
3722 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3723 If delayed-warnings-list is non-nil, the command loop calls
3724 `delayed-warnings-hook' after `post-command-hook'. At present, this
3725 is only used by Emacs on some platforms to display warnings during
3726 startup, which might otherwise not be noticed. This uses the
3727 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3729 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3731 ** New function `make-composed-keymap' that constructs a new keymap
3732 from multiple input maps. You can use this to make a keymap that
3733 inherits from multiple maps, eg:
3734 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3736 ** New function `string-prefix-p'.
3737 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3739 ** New reader macro ## that stands for the empty symbol.
3740 This means that the empty symbol can now be read back. Also, #: by itself
3741 (when not immediately followed by a possible symbol character) stands for
3742 an empty uninterned symbol.
3744 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3746 ** The following functions and variables are obsolete:
3748 *** `tooltip-use-echo-area' is obsolete.
3749 Rather than setting this to t, disable Tooltip mode instead.
3751 *** buffer-substring-filters is obsolete.
3752 Use `filter-buffer-substring-functions' instead.
3754 *** `byte-compile-disable-print-circle' is obsolete.
3756 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3757 Use `post-command-hook' instead.
3759 *** `font-lock-maximum-size' is obsolete.
3762 * Changes in Emacs 24.1 on Non-Free Operating Systems
3764 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3765 and also when HOME is set to C:\ by default.
3767 ** New configure.bat options
3769 *** --enable-checking builds Emacs with extra runtime checks.
3771 *** --distfiles specifies files to be included in binary distribution.
3773 *** --without-gnutls disables automatic GnuTLS detection.
3775 *** --lib for general library linkage, works with the USER_LIBS build variable.
3777 ** New make target `dist' to create binary distribution for MS Windows.
3779 ** The Lisp function `w32-default-color-map' is now obsolete.
3780 (It is only used internally in the Emacs C code.)
3782 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3783 reappear on mouse-over. (Requires OS X 10.6 or later.)
3785 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3786 other platforms, rather than inserting its contents into the buffer.
3789 ----------------------------------------------------------------------
3790 This file is part of GNU Emacs.
3792 GNU Emacs is free software: you can redistribute it and/or modify
3793 it under the terms of the GNU General Public License as published by
3794 the Free Software Foundation, either version 3 of the License, or
3795 (at your option) any later version.
3797 GNU Emacs is distributed in the hope that it will be useful,
3798 but WITHOUT ANY WARRANTY; without even the implied warranty of
3799 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3800 GNU General Public License for more details.
3802 You should have received a copy of the GNU General Public License
3803 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3808 paragraph-separate: "[
\f]*$"