1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
32 ** Emacs can now be compiled with file notification support.
33 This happens by default if a suitable system library is found at
34 build time. To prevent this, use the configure option
35 `--with-file-notification-no'. See below for file-notify features.
36 FIXME? This feature is not available for the Nextstep port. (?)
39 ** The configure option `--without-compress-info' has been generalized,
40 and renamed to `--without-compress-install'. It now prevents compression
41 of _any_ files during installation.
44 ** The configure option `--with-crt-dir' has been removed.
45 It is no longer needed, as the crt*.o files are no longer linked
49 ** Directories passed to configure option `--enable-locallisppath' are
50 no longer created during installation.
52 ** Emacs can be compiled with zlib support.
53 If this library is present (which it normally is on most systems), the
54 function `zlib-decompress-region' becomes available, which can
55 decompress gzip- and zlib-format compressed data.
58 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
59 This requires pkg-config to be available at configure time.
62 * Startup Changes in Emacs 24.4
65 ** When initializing `load-path', an empty element in the EMACSLOADPATH
66 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
67 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
68 load-path (the one that would have been used if EMACSLOADPATH was unset).
69 This makes it easier to _extend_ the load-path via EMACSLOADPATH
70 (previously, EMACSLOADPATH had to specify the complete load-path,
71 including the defaults). (In older versions of Emacs, an empty element
72 was replaced by ".", so use an explicit "." now if that is what you want.)
75 ** The -L option, which normally prepends its argument to load-path,
76 will instead append, if the argument begins with `:' (or `;' on MS Windows;
77 i.e., `path-separator').
80 ** If you use either site-load.el or site-init.el to customize the dumped
81 Emacs executable, any changes to `load-path' that these files make
82 will no longer be present after dumping. To affect a permanent change
83 to `load-path', use the `--enable-locallisppath' option of `configure'.
86 ** The user option `initial-buffer-choice' can now specify a function
87 to set up the initial buffer.
90 * Changes in Emacs 24.4
93 ** New option `gnutls-verify-error', if non-nil, means that Emacs
94 should reject SSL/TLS certificates that GnuTLS determines as invalid.
95 (This option defaults to nil at present, but this is expected to change
99 ** Emacs now supports menus on text-mode terminals.
100 If the terminal supports a mouse, clicking on the menu bar, or on
101 sensitive portions of the mode line or header line, will drop down the
102 menu defined at that position. Likewise, clicking C-mouse-2 or
103 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
106 If the text terminal does not support a mouse, you can activate the
107 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
109 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
110 customize the option `tty-menu-open-use-tmm' to a non-nil value.
111 (Typing M-` will always invoke `tmm-menubar', even if
112 `tty-menu-open-use-tmm' is nil.)
115 ** The *Messages* buffer is created in `messages-buffer-mode',
116 a new major mode, with read-only status. Any code that might create
117 the *Messages* buffer should call the function `messages-buffer' to do
118 so and set up the mode.
120 ** Emacs now supports ACLs (access control lists).
122 *** Emacs preserves the ACL entries of files when backing up.
124 *** New functions `file-acl' and `set-file-acl' get and set the ACL
125 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
126 libacl. On MS-Windows, the NT Security APIs are used to emulate the
127 POSIX ACL interfaces.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as if they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
144 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
145 You can change the default by customizing `blink-cursor-blinks'.
148 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
149 This affects View mode, etc.
154 *** The command `apropos-variable' is renamed to `apropos-user-option'.
155 `apropos-user-option' shows all user options while `apropos-variable'
156 shows all variables. When called with a universal prefix argument,
157 the two commands swap their behaviors. When `apropos-do-all' is
158 non-nil, they output the same results.
161 *** The key `?' now describes prefix bindings, like `C-h'.
163 *** The command `describe-function' has been extended for EIEIO.
164 Running it on constructors will show a full description of the
165 generated class. For generic functions, it will show all
166 implementations together with links to the source. The old commands
167 `describe-class', `describe-constructor' and `describe-generic' were
171 *** The function `quail-help' is no longer an interactive command.
172 Use `C-h C-\' (`describe-input-method') instead.
177 *** ImageMagick images now support the :max-width and :max-height keywords.
180 *** When using `create-image' with image data, you can pass a :format
181 attribute (via the property-list argument) in order to help
182 ImageMagick detect the image type. The value should be a MIME
183 content-type that is found in the new variable `image-format-suffixes'.
185 ** Frame and window changes
188 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
189 bound to <f11> and M-<f10>, respectively.
191 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
192 `frame-configuration-to-register'. It offers similar functionality,
193 plus enhancements like the ability to restore deleted frames. The
194 command `frame-configuration-to-register' still exists, but is unbound.
197 *** New hooks `focus-in-hook', `focus-out-hook'.
198 These are normal hooks run when an Emacs frame gains or loses input focus.
201 *** `split-window' is now a non-interactive function, not a command.
202 As a command, it was a special case of `C-x 2' (`split-window-below'),
203 and as such superfluous. After being reimplemented in Lisp, its
204 interactive form was mistakenly retained.
207 *** New option `scroll-bar-adjust-thumb-portion'.
208 Available only on X, this option allows to control over-scrolling
209 using the scroll bar (i.e. dragging the thumb down even when the end
210 of the buffer is visible).
212 ** Lisp evaluation changes
214 *** `eval-defun' on an already defined defcustom calls the :set function,
218 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
219 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
220 zero prefix argument. This disables truncation of lists in the output,
221 equivalent to setting `(eval-expression-)print-length' and
222 `(eval-expression-)print-level' to nil. Additionally, it causes integers
223 to be printed in other formats (octal, hexadecimal, and character).
226 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
229 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
230 because it affects caching of paragraph scanning results as well.
231 Also, it is now enabled by default.
234 ** The option `set-mark-default-inactive' has been deleted.
235 This unfinished feature was introduced by accident in Emacs 23.1;
236 simply disabling Transient Mark mode does the same thing.
238 ** The default value of `comment-use-global-state' is now t,
239 and this variable has been marked obsolete.
242 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
243 and works for git too, if you fetch the repository notes.
247 *** `read-regexp-defaults-function' defines a function to read regexps,
248 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp', etc.
249 You can customize this to specify a function that provides a default
250 value from the regexp last history element, or from the symbol found
254 *** `load-prefer-newer' affects how the `load' function chooses the
255 file to load. If this is non-nil, then when both .el and .elc
256 versions of a file exist, and the caller did not explicitly specify
257 which one to load, then the newer file is loaded. The default, nil,
258 means to always load the .elc file.
261 * Editing Changes in Emacs 24.4
263 ** Indentation changes
266 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
267 When invoked without a prefix argument, it now activates a transient
268 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
269 the text indentation in the region. Typing any other key resumes
270 normal editing behavior.
272 *** `electric-indent-mode' is enabled by default.
274 *** `tab-stop-list' is now implicitly extended to infinity by repeating
275 the last step. Its default value is changed to nil, which means a tab
276 stop every `tab-width' columns.
280 *** New command `cycle-spacing' cycles between spacing conventions:
281 having just one space, no spaces, or reverting to the original
282 spacing. Like `just-one-space', it can handle or ignore newlines and
283 leave different number of spaces.
285 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
286 a 1-letter word, which is an error according to Polish and
287 Czech typography rules. To globally enable this feature, evaluate:
289 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
292 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
294 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
295 Most commands are still unaware of it, but kill/yank do work on the rectangle.
298 ** New option `visual-order-cursor-movement'.
299 If this is non-nil, cursor motion with arrow keys will follow the
300 visual order of characters on the screen: <left> always moves to the
301 left, <right> always moves to the right, disregarding the surrounding
302 bidirectional context.
306 *** All register commands can now show help with preview.
309 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
312 *** New command `C-x r f' (`frameset-to-register').
313 See Changes in Emacs 24.4, above.
316 ** New command `delete-duplicate-lines'.
317 This searches the region for identical lines, and removes all but one
318 copy of each repeated line. The lines need not be sorted.
321 * Changes in Specialized Modes and Packages in Emacs 24.4
324 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
326 ~/.emacs.d/timelog replaces ~/.timelog
327 ~/.emacs.d/vip replaces ~/.vip
328 ~/.emacs.d/viper replaces ~/.viper
329 ~/.emacs.d/ido.last replaces ~/.ido.last
330 ~/.emacs.d/kkcrc replaces ~/.kkcrc
331 ~/.emacs.d/quickurls replaces ~/.quickurls
332 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
333 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
334 ~/.emacs.d/places replaces ~/.emacs-places
335 ~/.emacs.d/shadows replaces ~/.shadows
336 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
337 ~/.emacs.d/strokes replaces ~/.strokes
338 ~/.emacs.d/notes replaces ~/.notes
339 ~/.emacs.d/type-break replaces ~/.type-break
340 Also the following files used by the now obsolete otodo-mode.el:
341 ~/.emacs.d/todo-do replaces ~/.todo-do
342 ~/.emacs.d/todo-done replaces ~/.todo-done
343 ~/.emacs.d/todo-top replaces ~/.todo-top
345 ** Backtrace and debugger
347 *** The Lisp debugger's `e' command now includes the lexical environment
348 when evaluating the code in the context at point. Hence, it now lets
349 you access lexical variables.
352 *** New command `v' (`debugger-toggle-locals') displays local vars.
354 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
355 code run via JIT Lock.
358 ** Battery information can now be retrieved from BSD's `apm' utility.
361 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
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.
636 ** OPascal mode is the new name for Delphi mode
639 *** All delphi-* variables and functions have been renamed to opascal-*.
640 Obsolete aliases exist for those likely to have been used externally.
643 *** The option `delphi-newline-always-indents' has been removed.
644 Use `electric-indent-mode' instead.
647 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
651 *** The format of `archive-contents' files, generated by package
652 repositories, has changed to allow a new (fifth) element in the data
653 vectors, containing an associative list with extra properties.
655 *** `describe-package' buffer uses the `:url' extra property to
656 display a `Homepage' header, if it's present.
658 *** In the buffer produced by `describe-package', there are now buttons
659 listing the keywords related to that package. You can click on them
660 to see other packages related to any given keyword.
662 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
663 the packages by a keyword.
666 ** In Prolog mode, `prolog-use-smie' has been removed,
667 along with the non-SMIE indentation code.
671 *** The new command `remember-notes' creates a buffer that is saved on
672 `kill-emacs'. You can think of it as a *scratch* buffer whose content
673 is preserved. In fact, it was designed as a replacement for *scratch*
674 buffer and can be used that way by setting `initial-buffer-choice' to
675 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
676 Without the second change, the *scratch* buffer will still be there
677 for notes that do not need to be preserved.
679 *** The Remember package can now store notes in separates files.
680 You can use the new function `remember-store-in-files' within the
681 `remember-handler-functions' option. See `remember-data-directory'
682 and `remember-directory-file-name-format' for new options related to
687 *** Customize `rmail-mbox-format' to influence some minor aspects of
688 how Rmail displays non-MIME messages.
691 *** The `unrmail' command now converts from BABYL to mboxrd format,
692 rather than mboxo. Customize `unrmail-mbox-format' to change this.
697 *** Improved syntax highlighting and indentation.
700 *** New `electric-indent-mode' integration.
703 *** New option `ruby-encoding-magic-comment-style'.
706 *** New option `ruby-custom-encoding-magic-comment-template'.
709 *** New option `ruby-align-to-stmt-keywords'.
712 *** More Ruby file types have been added to `auto-mode-alist'.
714 ** Search and Replace
717 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
718 starts a symbol (identifier) incremental search forward with the
719 symbol found near point added to the search string initially.
722 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
723 and adds it to the search string.
725 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
726 between nil and the value of the option `search-invisible' (or `open'
729 *** `query-replace' skips invisible text when `search-invisible' is nil,
730 and opens overlays with hidden text when `search-invisible' is `open'.
733 *** A negative prefix arg of replacement commands replaces backward.
734 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
735 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
738 *** By default, prefix arguments do not now terminate Isearch mode.
739 Set `isearch-allow-prefix' to nil to restore old behavior.
742 *** More Isearch commands accept prefix arguments, namely
743 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
747 *** Word search now matches whitespace at the beginning/end
748 of the search string if it contains leading/trailing whitespace.
749 In an incremental word search or when using a non-nil LAX argument
750 of `word-search-regexp', the lax matching can also match part of
751 the first word (in addition to the lax matching of the last word).
752 The same rules are now applied to the symbol search with the difference
753 that it matches symbols, and non-symbol characters between symbols.
756 ** New SES command `ses-rename-cell' allows assigning names to SES cells.
759 ** The shell.el option `explicit-bash-args' includes --noediting by default.
760 All non-ancient Bash versions support this option.
764 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
766 *** The SMIE indentation engine is now used by default.
768 ** SMIE indentation can be customized via `smie-config'.
769 Emacs can learn the appropriate indentation settings if you provide it
770 with an indented sample file.
773 ** New Term mode option `term-suppress-hard-newline'.
776 ** Todo mode has been rewritten and enhanced.
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. New features include:
785 *** Support for multiple todo files and archive files of done items.
787 *** Renaming, reordering, moving, merging, and deleting categories.
789 *** Sortable tabular summaries of categories and the item types they contain.
791 *** Cross-category lists of items filtered by specific criteria.
793 *** More fine-grained interaction with the Emacs diary, by being able to
794 decide for each todo item whether it appears in the Fancy Diary display.
796 *** Highly flexible new item insertion and item editing.
798 *** Moving items between categories, storing done items in their category
799 or in archive files, undoing or unarchiving done items.
801 *** Reprioritizing items by inputting a numerical priority.
803 *** Extensive customizability of operation and display, including many faces.
807 *** No prompting for the destination buffer, unless a prefix argument is used.
809 *** With a prefix argument, you can enter a "context"; i.e., a Lisp
810 expression whose value at the time the function is entered/exited will
811 be printed along with the function name and arguments. For example,
812 you can use this to trace the value of current-buffer or point.
816 *** The experimental url syntax for remote file names has been removed.
819 *** New connection method "adb", which allows to access Android
820 devices by the Android Debug Bridge. The variable `tramp-adb-program'
821 can be used to adapt the path of the "adb" program, if needed.
823 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
824 "scpc" and "rsyncc" are discontinued. The ssh option
825 "ControlMaster=auto" is set automatically in all ssh-based methods,
829 *** Handlers for `file-acl' and `set-file-acl' for remote machines
830 which support POSIX ACLs.
833 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
834 for remote machines which support filesystem notifications.
836 ** New command `url-cookie-list' displays all the current cookies, and
837 allows deleting selected cookies.
839 ** VC and related modes
842 *** In VC directory mode, `D' displays diffs between VC-controlled
843 whole tree revisions.
846 *** In VC directory mode, `L' lists the change log for the current VC
847 controlled tree in a window.
850 *** In VC directory mode, `I' shows a log of changes that will be
851 received with a pull operation.
854 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
855 under current version control system. When called with a prefix
856 argument, you can remove a file from the ignored file list.
859 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
860 because it is moved to vc-cvs.el.
865 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
868 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
871 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
872 are obsolete. Customize the `woman-*' faces instead.
874 ** Obsolete packages:
876 *** Iswitchb is made obsolete by icomplete-mode.
878 *** longlines.el is obsolete; use visual-line-mode instead.
884 *** terminal.el is obsolete; use term.el instead.
887 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
890 *** xesam.el is obsolete, because the XESAM project has been canceled.
893 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
896 *** The Info-edit command is obsolete. Editing Info nodes by hand
897 has not been relevant for some time.
900 * New Modes and Packages in Emacs 24.4
903 ** New package `eww' is a built-in web browser.
904 It is only available if Emacs is compiled with libxml2 support.
906 ** New minor mode `superword-mode'.
907 This overrides the default word motion commands to treat "symbol_words"
908 as a single word, similar to what `subword-mode' does.
911 ** New package nadvice.el offers lighter-weight advice facilities.
914 *** add-function/remove-function, which can be used to add/remove code on any
915 function-carrying place, such as process-filters or `<foo>-function' hooks.
917 *** advice-add/advice-remove to add/remove a piece of advice on a named
918 function,much like `defadvice' does.
920 ** New package frameset.el.
921 It provides a set of operations to save a frameset (the state of all
922 or a subset of the existing frames and windows, somewhat similar to a
923 frame configuration), both in-session and persistently, and restore it
924 at some point in the future.
927 ** New package filenotify.el provides an interface for file system
928 notifications. It requires that Emacs be compiled with one of the
929 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
932 * Incompatible Lisp Changes in Emacs 24.4
935 ** `kill-region' has lost its `yank-handler' optional argument.
938 ** `(input-pending-p)' no longer runs other timers that are ready to run.
939 The new optional CHECK-TIMERS parameter allows for the prior behavior.
942 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
945 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
946 Some languages match those as »...«, and others as «...», so it is
947 better for Emacs to stay neutral by default.
950 ** In compiled Lisp files, the header no longer includes a timestamp.
953 ** The default file coding for Emacs Lisp files is now utf-8.
954 (See `file-coding-system-alist'.) In most cases, this change is
955 transparent, but files that contain unusual characters without
956 specifying an explicit coding system may fail to load with obscure
957 errors. You should either convert them to utf-8 or add an explicit
961 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
962 It used to disable the minor mode, major mode, and text-property keymaps,
963 whereas now it simply has higher precedence.
965 ** Default process filters and sentinels are not nil any more.
966 Instead they default to a function that does what the nil value used to do.
969 ** `read-event' does not return decoded chars in ttys any more.
970 As was the case in Emacs 22 and before, the decoding of terminal
971 input, according to `keyboard-coding-system', is not performed in
972 `read-event' any more. But unlike in Emacs 22, this decoding is still
973 done before input-decode-map, function-key-map, etc.
976 ** The option `inhibit-local-menu-bar-menus' has been removed.
979 ** Frame-local variables that affect redisplay do not work any more.
980 More specifically, redisplay does not bother to check for a frame-local
981 value when looking up variables.
984 ** nil and "unbound" are indistinguishable in `symbol-function'.
985 `symbol-function' does not signal a `void-function' error any more.
986 To determine if a symbol's function definition is void, use `fboundp'.
989 ** `defadvice' does not honor the `freeze' flag and cannot advise
990 special-forms any more.
993 ** `dolist' no longer binds VAR while evaluating the RESULT form,
994 when lexical binding is enabled. Previously, VAR was bound to nil,
995 which often led to spurious unused-variable warnings.
998 ** The return value of `backup-buffer' has changed.
999 The second argument is no longer an SELinux context, instead it is an
1000 alist of extended attributes as returned by the new function
1001 `file-extended-attributes'. The attributes can be applied to another
1002 file using `set-file-extended-attributes'.
1005 ** By default `copy-file' no longer copies file permission bits to an
1006 existing destination; and it sets the file permission bits of a newly
1007 created destination to those of the source, masked by the default file
1008 permissions. To copy the file permission bits, pass t as the
1009 PRESERVE-PERMISSIONS argument of `copy-file'.
1012 ** `visited-file-modtime' now returns -1 for nonexistent files.
1013 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1014 in the presence of files with negative time stamps.
1017 ** The cars of the elements in `interpreter-mode-alist' are now
1018 treated as regexps rather than literal strings.
1021 * Lisp Changes in Emacs 24.4
1024 ** The second argument of `eval' can now specify a lexical environment.
1027 ** New functions `special-form-p' and `macrop'.
1029 ** New macro `define-alternatives' can be used to define generic commands.
1030 Generic commands are interactive functions whose implementation can be
1031 selected among several alternatives, as a matter of user preference.
1033 ** The `defalias-fset-function' property lets you catch `defalias'
1034 calls, and redirect them to your own function, instead of `fset'.
1037 ** New variable `enable-dir-local-variables'.
1038 Directory-local variables are ignored if this is nil. This may be
1039 useful for modes that want to ignore directory-locals while still
1040 respecting file-local variables.
1043 ** New function `get-pos-property'.
1045 ** Completion changes
1047 *** The separator for `completing-read-multiple' can now be a regexp.
1048 The default separator has been changed to allow surrounding spaces
1051 *** The `common-substring' arg of `display-completion-list' is obsolete.
1052 Either use `completion-all-completions', which returns highlighted
1053 strings (including for partial or substring completion), or call
1054 `completion-hilit-commonality' to add the highlight.
1056 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1057 let you enable symbol prettification (replacing a string like "lambda" with
1058 the Greek lambda character).
1063 *** Functions to pop up menus and dialogs now work on all terminals,
1064 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1065 `message-box', `yes-or-no-p', etc.
1067 The function `display-popup-menus-p' will now return non-nil for a
1068 display or frame whenever a mouse is supported on that display or
1071 *** New hook `tty-setup-hook'.
1075 *** New display action function `display-buffer-no-window' to not
1076 display the buffer in a window.
1078 *** New display action alist entry `allow-no-window' to indicate the
1079 caller of `display-buffer' is ready to handle the case of not
1080 displaying the buffer in a window.
1082 ** New hook `pre-redisplay-function'.
1085 ** New bool-vector set operation functions:
1086 *** `bool-vector-exclusive-or'
1087 *** `bool-vector-union'
1088 *** `bool-vector-intersection'
1089 *** `bool-vector-set-difference'
1090 *** `bool-vector-not'
1091 *** `bool-vector-subsetp'
1092 *** `bool-vector-count-consecutive'
1093 *** `bool-vector-count-population'
1096 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1098 ** Error-handling changes
1101 *** New function `define-error'.
1104 *** `with-demoted-errors' takes an additional argument `format'.
1107 ** New macro `with-eval-after-load'.
1108 This is like the old `eval-after-load', but better behaved.
1111 ** New library subr-x.el with miscellaneous small utility functions
1112 *** `hash-table-keys'
1113 *** `hash-table-values'
1114 *** `string-blank-p`
1115 *** `string-empty-p`
1117 *** `string-reverse`
1118 *** `string-trim-left'
1119 *** `string-trim-right'
1121 *** `string-remove-prefix'
1122 *** `string-remove-suffix'
1125 ** Obsoleted functions:
1128 *** `lisp-complete-symbol'
1129 *** `field-complete'
1130 *** `minibuffer-completion-contents'
1131 *** `isearch-nonincremental-exit-minibuffer'
1132 *** `isearch-filter-visible'
1133 *** `generic-make-keywords-list'
1134 *** `get-upcase-table' (use `case-table-get-table' instead).
1136 ** `with-wrapper-hook' is obsoleted by `add-function'.
1137 The few hooks that used with-wrapper-hook are replaced as follows:
1138 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1139 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1140 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1143 ** `byte-compile-interactive-only-functions' is now obsolete.
1144 To specify that a command should only be called interactively, give it
1145 a non-nil `interactive-only' property.
1148 ** `split-string' now takes an optional argument TRIM.
1149 The value, if non-nil, is a regexp that specifies what to trim from
1150 the start and end of each substring.
1153 ** New function `string-suffix-p'.
1155 ** File-handling changes
1158 *** Support for filesystem notifications.
1159 Emacs now supports notifications of filesystem changes, such as
1160 creation, modification, and deletion of files. This requires the
1161 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1162 MS-Windows systems, this is supported for Windows XP and newer
1166 *** The 9th element returned by `file-attributes' is now unspecified.
1167 Formerly, it was t if the file's gid would change if file were deleted
1168 and recreated. This value has been inaccurate for years on many
1169 platforms, and nobody seems to have noticed or cared.
1172 *** The 6th argument to `copy-file' has been renamed to
1173 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1174 Unix file permission bits as well as SELinux context.
1177 *** The function `file-ownership-preserved-p' now has an optional
1178 argument GROUP which causes it check for file group too. This can be
1179 used in place of the 9th element of `file-attributes'.
1182 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1183 argument, with the same interpretation as the returned value of
1184 `visited-file-modtime'.
1186 ** Autorevert changes
1189 *** If Emacs is compiled with file notification support, notifications
1190 are used instead of checking the time stamp of the files. You can
1191 disable this by setting the user option `auto-revert-use-notify' to
1192 nil. Alternatively, a regular expression of directories to be
1193 excluded from file notifications can be specified by
1194 `auto-revert-notify-exclude-dir-regexp'.
1197 *** The new user option `auto-revert-remote-files' enables reversion
1198 of remote files when set to non-nil.
1202 *** The function `face-spec-set' is now like `setq' for face specs.
1203 Its third arg now accepts values specifying a face spec type (defface,
1204 custom, or override spec), and the relevant spec is set accordingly.
1207 *** New function `add-face-text-property', which can be used to
1208 conveniently prepend/append new face properties.
1210 *** Face specs set via Custom themes now replace the `defface' spec
1211 rather than inheriting from it (as do face specs set via Customize).
1213 *** New face characteristic (supports :underline (:style wave))
1214 specifies whether or not the terminal can display a wavy line.
1217 *** New face spec attribute :distant-foreground
1218 specifies foreground to use if background color is near the foreground
1219 color that would otherwise have been used.
1224 *** `image-animated-p' is now `image-multi-frame-p'.
1225 It returns non-nil for any image that contains multiple frames,
1226 whether or not it specifies a frame delay.
1229 *** New variable `image-default-frame-delay' gives the frame delay for
1230 animated images which do not specify a frame delay.
1233 *** New functions `image-current-frame' and `image-show-frame' for getting
1234 and setting the current frame of a multi-frame image.
1239 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1240 **** object-name -> eieio-object-name
1241 **** object-class -> eieio-object-class
1242 **** object-class-fast -> eieio--object-class
1243 **** object-class-name -> eieio-object-class-name
1244 **** object-name-string -> eieio-object-name-string
1245 **** object-num-slots -> eieio--object-num-slots
1246 **** object-set-name-string -> eieio-object-set-name-string
1247 **** class-of -> eieio-object-class
1248 **** class-name -> eieio-class-name
1249 **** class-parent -> eieio-class-parent
1250 **** class-parents -> eieio-class-parents
1251 **** class-parents-fast -> eieio-class-parents-fast
1252 **** class-children -> eieio-class-children
1253 **** class-num-slots -> eieio--class-num-slots
1254 **** class-precedence-list -> eieio-class-precedence-list
1255 **** class-direct-subclasses -> eieio-class-children
1256 **** class-direct-superclasses -> eieio-class-parents
1258 ** Changes in encoding and decoding of text
1261 *** New coding-system `prefer-utf-8'.
1262 This is like `undecided' but prefers UTF-8 on decoding if the text to
1263 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1264 any non-ASCII characters are automatically encoded as UTF-8.
1267 *** New attributes of coding-systems whose type is `undecided'.
1268 Two new attributes, `:inhibit-null-byte-detection' and
1269 `:inhibit-iso-escape-detection', determine how to detect encoding of
1270 text that includes null bytes and ISO-2022 escape sequences,
1271 respectively. Each of these attributes can be either nil, zero, or
1272 t. If it is t, decoding text ignores null bytes and, respectively,
1273 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1274 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1275 text is encoded in one of the ISO-2022 encodings, such as
1276 iso-2022-7bit. If the value is zero, Emacs consults the variables
1277 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1279 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1280 UTF-8 encoding and decoding, whenever possible.
1282 These attributes are only meaningful for coding-systems of type
1283 `undecided'. (The type of a coding-system is determined by its
1284 `:coding-type' attribute and can be accessed by calling the
1285 `coding-system-type' function.)
1288 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1291 ** New functions `group-gid' and `group-real-gid'.
1294 ** The spelling of the rx.el category `chinese-two-byte' has been
1295 corrected (the first 'e' was missing).
1298 ** Minor internal changes to the details of lock files.
1299 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1300 If DIR/.#FILE already exists and is not an Emacs lock file,
1301 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1302 numbered lock files DIR/.#FILE.0...).
1303 On file systems that do not support symbolic links, the lock is now a
1304 regular file with contents being what would have been in the symlink.
1306 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1309 *** The package descriptor and name of global variables, constants,
1310 and functions should be separated by two hyphens if the symbol is not
1311 meant to be used by other packages.
1314 * Changes in Emacs 24.4 on Non-Free Operating Systems
1317 ** The procedure for building Emacs on MS-Windows has changed.
1318 It is now built by running the same configure script as on all other
1319 platforms. This requires the MSYS environment and MinGW development
1320 tools. See the updated instructions in nt/INSTALL for details.
1322 Using the Posix configure script and Makefile's also means a change in
1323 the directory structure of the Emacs installation on Windows. It is
1324 now the same as on GNU and Unix systems. In particular, the auxiliary
1325 programs, such as cmdproxy.exe and hexl.exe, are in
1326 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1327 version), version-independent site-lisp is in share/emacs/site-lisp,
1328 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1329 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1330 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1331 directories and will find the files in there automatically; there's no
1332 need to set any variables due to this change.)
1335 ** Emacs on Windows 2000 and later can now access files and directories
1336 whose names cannot be encoded in the current system codepage.
1338 The new variable `w32-unicode-filenames' controls this feature: if it
1339 is t, Emacs uses Unicode APIs to pass file names to system calls,
1340 which lifts the limitation of file names to the current locale.
1343 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1344 The backtrace is written to the 'emacs_backtrace.txt' file in the
1345 directory where Emacs was running.
1348 ** The variable `buffer-file-type' is no longer supported.
1349 Setting it has no effect, and %t in the mode-line format is ignored.
1350 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1351 modifying it has no effect.
1354 ** Lock files now work on MS-Windows.
1355 This helps to prevent losing your edits if the same file is being
1356 edited in another Emacs session or by another user. See the node
1357 "Interlocking" in the Emacs User Manual for the details. To disable
1358 file locking, customize `create-lockfiles' to nil.
1360 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1361 GNUstep and Mac OS X 10.4 use the old font backend.
1362 To use the old backend by default, do on the command line:
1363 % defaults write org.gnu.Emacs FontBackend ns
1365 ** Improved fullscreen support on Mac OS X.
1366 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1367 Customize `ns-use-native-fullscreen' to change the style.
1368 For Mac OS X 10.7 and newer, native is the default.
1370 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1371 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1372 does not apply to images.
1375 * Installation Changes in Emacs 24.3
1377 ** The default X toolkit is now Gtk+ version 3.
1378 If you don't pass `--with-x-toolkit' to configure, or if you use
1379 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1380 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1381 You can explicitly require a specific version by passing
1382 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1384 ** New configure option `--enable-link-time-optimization', to utilize
1385 an appropriate feature provided by GCC since version 4.5.0.
1387 ** New configure option `--without-all' to disable most of the optional
1388 features (image support, etc.) that are normally enabled by default.
1390 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1391 Emacs). If building with GCC, this enables compile-time checks that
1392 warn/give errors about possibly-questionable C code. On a recent GNU
1393 system there should be no warnings; on older and on non-GNU systems
1394 the results may be useful to developers.
1396 ** The configure option `--enable-use-lisp-union-type' has been
1397 renamed to `--enable-check-lisp-object-type', as the resulting
1398 Lisp_Object type no longer uses a union to implement the compile time
1399 check that this option enables.
1401 ** The configure option `--disable-maintainer-mode' has been removed,
1402 as it was confusingly-named and rarely useful.
1404 ** The configure options `--program-prefix', `--program-suffix', and
1405 `--program-transform-name' apply to more than just the installed
1406 binaries. Now they also affect the man pages, icons, and the
1407 etc/emacs.desktop file; but not the info pages, since this would break
1408 links between the various manuals.
1410 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1411 overwriting "emacs" in the installation bin/ directory with a link
1414 ** Emacs uses libtinfo in preference to libncurses, if available.
1416 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1417 /usr/pkg/lib to the linker search path. You must add them yourself if
1420 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1421 (from the bin and libexec directories, respectively). The former is
1422 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1425 * Startup Changes in Emacs 24.3
1427 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1428 lisp/ directory. There should not be any there anyway. If you have
1429 been adding them there, put them somewhere else; e.g., site-lisp.
1431 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1434 * Changes in Emacs 24.3
1438 *** `C-h f' (`describe-function') can now perform autoloading.
1439 When this command is called for an autoloaded function whose docstring
1440 contains a key substitution construct, that function's library is
1441 automatically loaded, so that the documentation can be shown
1442 correctly. To disable this, set `help-enable-auto-load' to nil.
1444 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1445 even after their associated libraries have been loaded (and the
1446 autoloads have been redefined as functions).
1450 *** Images displayed via ImageMagick now support transparency and the
1451 :background image specification property.
1453 *** When available, ImageMagick support is automatically enabled.
1454 It is no longer necessary to call `imagemagick-register-types'
1455 explicitly to install ImageMagick image types; that function is called
1456 automatically at startup, or when customizing an imagemagick- option.
1458 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1459 ImageMagick to view images. (You must call `imagemagick-register-types'
1460 afterwards if you do not use customize to change this.)
1462 *** The new variable `imagemagick-enabled-types' also affects which
1463 ImageMagick types are treated as images. The function
1464 `imagemagick-filter-types' returns the list of types that will be
1469 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1470 next and previous path separator, respectively.
1472 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1473 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1474 non-nil before enabling the mode.
1478 *** New option `mode-line-default-help-echo' specifies the help text
1479 (shown in a tooltip or in the echo area) for any part of the mode line
1480 that does not have its own specialized help text.
1482 *** You can now click mouse-3 in the coding system indicator to invoke
1483 `set-buffer-file-coding-system'.
1485 ** Server and client
1487 *** emacsclient now obeys string values for `initial-buffer-choice',
1488 if it is told to open a new frame without specifying any file to visit
1489 or expression to evaluate.
1491 *** New option `server-auth-key' specifies a shared server key.
1493 ** Emacs now generates backtraces on fatal errors.
1494 On encountering a fatal error, Emacs now outputs a textual description
1495 of the fatal signal, and a short backtrace on platforms like glibc
1496 that support backtraces.
1498 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1499 This minor mode replaces `toggle-read-only', which is now obsolete.
1501 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1502 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1503 respectively, without exiting from the prompt.
1505 ** In the Package Menu, newly-available packages are listed as "new",
1506 and sorted above the other "available" packages by default.
1508 ** If your Emacs was built from a repository checkout, the new variable
1509 `emacs-bzr-version' contains information about the bzr revision used.
1511 ** New option `create-lockfiles' specifies usage of lockfiles.
1512 It defaults to t. Changing it to nil inhibits the creation of lock
1513 files (use this with caution).
1515 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1516 variables on remote hosts.
1518 ** The entry for PCL-CVS has been removed from the Tools menu.
1519 The PCL-CVS commands are still available via the keyboard.
1521 ** Using "unibyte: t" in Lisp source files is obsolete.
1522 Use "coding: raw-text" instead.
1524 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1525 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1526 The previous binding, introduced in Emacs 24.1, was a mistake, because
1527 `C-c LETTER' bindings are reserved for user customizations.
1529 ** Internationalization
1531 *** New language environment: Persian.
1533 *** New input method `vietnamese-vni'.
1535 ** Nextstep (GNUstep / Mac OS X) port
1537 *** Support for fullscreen and the frame parameter fullscreen.
1539 *** A file dialog is used for open/save operations initiated from the
1543 * Editing Changes in Emacs 24.3
1545 ** Search and Replace
1547 *** Non-regexp Isearch now performs "lax" space matching.
1548 Each sequence of spaces in the supplied search string may match any
1549 sequence of one or more whitespace characters, as specified by the
1550 variable `search-whitespace-regexp'. (This variable is also used by a
1551 similar existing feature for regexp Isearch.)
1553 *** New Isearch command `M-s SPC' toggles lax space matching.
1554 This applies to both ordinary and regexp Isearch.
1556 *** New option `replace-lax-whitespace'.
1557 If non-nil, `query-replace' uses flexible whitespace matching too.
1560 *** Global `M-s _' starts a symbol (identifier) incremental search,
1561 and `M-s _' in Isearch toggles symbol search mode.
1562 `M-s c' in Isearch toggles search case-sensitivity.
1564 ** Navigation commands
1566 *** New binding `M-g c' for `goto-char'.
1568 *** New binding `M-g TAB' for `move-to-column'.
1570 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1571 interactively with no prefix arg. Previously, it moved to column 1.
1573 ** New option `yank-handled-properties' allows processing of text
1574 properties on yanked text, in ways that are more general than just
1575 removing them (as is done by `yank-excluded-properties').
1577 ** New option `delete-trailing-lines' specifies whether
1578 M-x delete-trailing-whitespace should delete trailing lines at the end
1579 of the buffer. It defaults to t.
1581 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1583 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1584 `ucs-insert' is now an obsolete alias for `insert-char'.
1586 ** The `z' key no longer has a binding in most special modes.
1587 It used to be bound to `kill-this-buffer', but `z' is too easy to
1590 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1591 It copies the region-rectangle as the last rectangle kill.
1595 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1597 *** New option `register-separator' specifies the register containing
1598 the text to put between collected texts for use with
1599 M-x append-to-register and M-x prepend-to-register.
1602 * Changes in Specialized Modes and Packages in Emacs 24.3
1604 ** Common Lisp emulation (CL)
1606 *** CL's main entry is now (require 'cl-lib).
1607 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1608 i.e., all its definitions have the "cl-" prefix (and internal definitions
1609 use the "cl--" prefix).
1611 If `cl' provided a feature under the name `foo', then `cl-lib'
1612 provides it under the name `cl-foo' instead; with the exceptions of the
1613 few `cl' definitions that had to use `foo*' to avoid conflicts with
1614 pre-existing Elisp entities. These have been renamed to `cl-foo'
1615 rather than `cl-foo*'.
1617 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1618 provide the old, non-prefixed names. Some exceptions are listed below:
1620 *** `cl-flet' is not like `flet' (which is deprecated).
1621 Instead it obeys the behavior of Common-Lisp's `flet'.
1622 In particular, in cl-flet function definitions are lexically scoped,
1623 whereas in flet the scoping is dynamic.
1625 *** `cl-labels' is slightly different from `labels'.
1626 The difference is that it relies on the `lexical-binding' machinery
1627 (as opposed to the `lexical-let' machinery used previously) to capture
1628 definitions in closures, so such closures will only work if `lexical-binding'
1631 *** `cl-letf' is not exactly like `letf'.
1632 The only difference is in details that relate to some deprecated usage
1633 of `symbol-function' in place forms.
1635 *** `progv' was rewritten to use the `let' machinery.
1636 A side effect is that variables without corresponding values are bound
1637 to nil rather than being made unbound.
1639 *** The following methods of extending `setf' are obsolete
1640 (use features from gv.el instead):
1641 `define-modify-macro' (use `gv-letplace')
1642 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1643 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1644 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1648 *** Changes are now highlighted using the same color scheme as in
1649 modern VCSes. Deletions are displayed in red (new faces
1650 `diff-refine-removed' and `smerge-refined-removed', and new definition
1651 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1652 and `smerge-refined-added', and new definition of `diff-added').
1654 *** The variable `diff-use-changed-face' defines whether to use the
1655 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1656 changes in context diffs.
1658 *** The new command `diff-delete-trailing-whitespace' removes trailing
1659 whitespace introduced by a diff.
1661 ** Ediff now uses the same color scheme as Diff mode.
1665 A new version of python.el, which provides several new features, including:
1666 per-buffer shells, better indentation, Python 3 support, and improved
1667 shell-interaction compatible with iPython (and virtually any other
1670 *** Some user options have been replaced/renamed, including (old -> new):
1671 **** python-indent -> python-indent-offset
1672 **** python-guess-indent -> python-indent-guess-indent-offset
1673 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1674 **** python-use-skeletons -> python-skeleton-autoinsert
1676 *** Some user options have been removed, including:
1678 **** `python-indent-string-contents': Strings are never indented.
1680 **** `python-honour-comment-indentation':
1681 Comments are always considered as indentation markers.
1683 **** `python-continuation-offset': Indentation is automatically
1684 calculated in a pep8 compliant way depending on the context.
1686 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1687 Have no direct mapping as the shell interaction is completely different.
1689 **** `python-python-command', `python-jython-command':
1690 Replaced by `python-shell-interpreter'.
1692 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1693 `python-pdbtrack-minor-mode-string', `python-source-modes':
1696 *** Some commands have been replaced (old -> new):
1697 **** python-insert-class -> python-skeleton-class
1698 **** python-insert-def -> python-skeleton-def
1699 **** python-insert-for -> python-skeleton-for
1700 **** python-insert-if -> python-skeleton-if
1701 **** python-insert-try/except -> python-skeleton-try
1702 **** python-insert-try/finally -> python-skeleton-try
1703 **** python-insert-while -> python-skeleton-while
1704 **** python-find-function -> python-nav-jump-to-defun
1705 **** python-next-statement -> python-nav-forward-sentence
1706 **** python-previous-statement -> python-nav-backward-sentence
1707 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1708 **** python-end-of-defun-function -> python-nav-end-of-defun
1709 **** python-send-buffer -> python-shell-send-buffer
1710 **** python-send-defun -> python-shell-send-defun
1711 **** python-send-region -> python-shell-send-region
1712 **** python-send-region-and-go -> emulate with python-shell-send-region
1713 and python-shell-switch-to-shell
1714 **** python-send-string -> python-shell-send-string
1715 **** python-switch-to-python -> python-shell-switch-to-shell
1716 **** python-describe-symbol -> python-eldoc-at-point
1720 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1722 *** The D-Bus object manager interface is implemented.
1724 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1725 if their value does not fit into Emacs's integer range.
1727 *** The function `dbus-call-method' is now non-blocking.
1728 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1730 *** Signals can also be sent as unicast messages.
1732 *** The argument list of `dbus-register-signal' has been extended,
1733 according to the new match rule types of D-Bus.
1735 *** `dbus-init-bus' supports private connections.
1737 *** There is a new function `dbus-setenv'.
1739 ** `desktop-path' no longer includes the "." directory.
1740 Desktop files are now located in ~/.emacs.d by default.
1744 *** `dired-do-async-shell-command' executes each file sequentially
1745 if the command ends in `;' (when operating on multiple files).
1746 Otherwise, it executes the command on each file in parallel.
1748 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1749 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1752 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1753 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1754 mark/unmark/flag all files in the active region.
1756 *** The minibuffer default for `=' (`dired-diff') has changed.
1757 It is now the backup file for the file at point, if one exists.
1758 In Transient Mark mode the default is the file at the active mark.
1760 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1761 The global binding for `M-=', `count-words-region' is in effect.
1765 *** New module "notifications", which can send a notification when you
1766 receive a private message or your nickname is mentioned.
1768 *** ERC will look up server/channel names via auth-source and use any
1771 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1772 only applies to messages sent by lurkers.
1774 ** reStructuredText mode
1776 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1777 fontification, comment handling, and customization have all been revised
1780 *** Support for `imenu' and `which-function-mode'.
1782 *** The reStructuredText syntax is more closely covered.
1783 Sphinx support has been improved.
1785 *** `rst-insert-list' inserts new list or continues existing lists.
1787 *** A negative prefix argument always works for `rst-adjust'.
1789 *** The window configuration is reset after displaying a TOC.
1791 *** The constant `rst-version' describes the rst.el package version.
1795 *** Support for percent literals and recognition of regular expressions
1796 in method calls without parentheses with more methods, including Cucumber
1799 *** Improved syntax highlighting and indentation.
1801 *** New command `ruby-toggle-block', bound to `C-c {'.
1803 *** Some non-standard keybindings/commands have been removed:
1805 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1807 **** `ruby-mark-defun'; use `mark-defun'.
1809 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1810 appropriate settings for the variables `beginning-of-defun-function'
1811 and `end-of-defun-function'.
1813 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1814 `reindent-then-newline-and-indent' and `newline' have been removed.
1816 ** Shell Script mode
1818 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1820 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1822 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1826 *** The free software compiler GHDL is supported (and now the default).
1828 *** Support for the VHDL-AMS packages has been added/updated.
1830 *** Updated to the 2002 revision of the VHDL standard.
1832 *** Accepts \r and \f as whitespace.
1836 *** The faces used by Apropos are now directly customizable.
1837 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1838 see the `apropos' Custom group for details.
1840 *** The old options whose values specified faces to use have been removed
1841 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1845 *** This package has been rewritten to use Tabulated List mode.
1847 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1848 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1852 *** Algebraic simplification mode is now the default.
1853 To restrict to the limited simplifications given by the former
1854 default simplification mode, use `m I'.
1858 *** You can customize the header text that appears above each calendar month.
1859 See the variable `calendar-month-header'.
1861 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1863 *** The calendars produced by cal-html include holidays.
1864 Customize `cal-html-holidays' to change this.
1868 *** The major modes from the parser generators "Bovine" and "Wisent"
1869 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1870 are in `auto-mode-alist', and the corresponding manuals are included.
1874 **** Menu support for the "Configuration" feature. This allows users to
1875 choose the active configuration (such as debug or install) from the menu.
1877 **** New command `ede-set' to interactively set project-local variables.
1879 **** Support for compiling, debugging, and running in "generic" projects.
1881 **** Autoconf editing support for M4 macros with complex arguments.
1883 **** Compilation support for the "linux" project type.
1885 **** "simple" projects have been removed; use "generic" projects instead.
1889 **** Support for parsing #include statements inside a namespace in C/C++.
1891 **** Improved support for 'extern "C"' declarations in C/C++.
1893 **** The ability to ignore more common special C/C++ preprocessor symbols,
1894 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1895 If available, include cdefs.h as an additional source of preprocessor symbols.
1897 **** Improved C/C++ function pointer parsing.
1899 **** In Python, support for converting imports to include file names.
1901 **** Ability to dynamically determine the Python load path.
1903 **** Support for the Python 'WITH' and 'AT' keywords.
1905 **** Improved tooltip completion.
1909 **** The SRecode manual is now included.
1911 **** Tag generation supports constructor/destructor settings and system
1912 include differentiation.
1914 **** Addition of 'Framework' support: Frameworks are specified when a
1915 particular kind of library (such as Android) is needed in a common language
1918 **** Support for nested templates and let variables override based on priority.
1920 **** Support for merging tables from multiple related modes, such as
1921 default -> c++ -> arduino.
1923 ** Compile has a new option `compilation-always-kill'.
1927 *** `custom-reset-button-menu' now defaults to t.
1929 *** Non-option variables are never matched in `customize-apropos' and
1930 `customize-apropos-options' (i.e., the prefix argument does nothing for
1931 these commands now).
1935 *** The variables `term-default-fg-color' and `term-default-bg-color'
1936 are now deprecated in favor of the customizable face `term'.
1938 *** You can customize how to display ANSI terminal colors and styles
1939 by customizing the corresponding `term-color-<COLOR>',
1940 `term-color-underline' and `term-color-bold' faces.
1944 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1946 *** Remote processes are now also supported on remote MS-Windows hosts.
1950 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1951 Previously, this slot stored semicolon-separated attribute-value pairs
1952 appended to some imap URLs, but this is not compatible with RFC 3986.
1953 So now the `filename' slot stores the entire path and query components,
1954 and the `attributes' slot is always nil.
1956 *** New function `url-encode-url' for encoding a URI string.
1957 The `url-retrieve' function now uses this to encode its URL argument,
1958 in case that is not properly encoded.
1960 ** notifications.el supports now version 1.2 of the Notifications API.
1961 The function `notifications-get-capabilities' returns the supported
1964 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1965 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1966 `flymake-warning-bitmap'.
1968 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1969 specifying URL types that should be converted to remote file names at
1970 the FFAP prompt. The default is now '("ftp").
1972 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1973 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1975 ** New option `mouse-avoidance-banish-position' specifies where the
1976 `banish' mouse avoidance setting moves the mouse.
1978 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1979 closing brackets to be aligned with the line of the opening bracket.
1981 ** In Proced mode, new command `proced-renice' renices marked processes.
1983 ** New option `async-shell-command-buffer' specifies the buffer to use
1984 for a new asynchronous `shell-command' when the default output buffer
1985 `*Async Shell Command*' is already in use.
1987 ** SQL mode has a new option `sql-db2-escape-newlines'.
1988 If non-nil, newlines sent to the command interpreter will be escaped
1989 by a backslash. The default does not escape the newlines and assumes
1990 that the sql statement will be terminated by a semicolon.
1992 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1993 (and modes that derive from it), sorts the column at point, or the Nth
1994 column if a numeric prefix argument is given.
1996 ** `which-func-modes' now defaults to t, so Which Function mode, when
1997 enabled, applies to all applicable major modes.
1999 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2002 ** Follow mode no longer works by using advice.
2003 The option `follow-intercept-processes' has been removed.
2005 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2007 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2008 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2009 *** semantic-change-hooks -> semantic-change-functions
2010 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2011 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2012 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2013 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2014 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2015 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2016 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2017 *** rcirc-activity-hooks -> rcirc-activity-functions
2018 *** rcirc-print-hooks -> rcirc-print-functions
2019 *** dbus-event-error-hooks -> dbus-event-error-functions
2020 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2021 *** checkdoc-style-hooks -> checkdoc-style-functions
2022 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2023 *** archive-extract-hooks -> archive-extract-hook
2024 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2025 *** hfy-post-html-hooks -> hfy-post-html-hook
2026 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2027 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2028 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2029 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2031 ** Obsolete packages
2034 In most cases, assoc+member+push+delq work just as well.
2035 And in any case it's just a terrible package: ugly semantics, terrible
2036 inefficiency, and not namespace-clean.
2045 * Incompatible Lisp Changes in Emacs 24.3
2047 ** Docstrings starting with `*' no longer indicate user options.
2048 Only variables defined using `defcustom' are considered user options.
2049 The function `user-variable-p' is now an obsolete alias for
2050 `custom-variable-p'.
2052 ** The return values of `defalias', `defun' and `defmacro' have changed,
2053 and are now undefined. For backwards compatibility, `defun' and
2054 `defmacro' currently return the name of the newly defined
2055 function/macro, but this should not be relied upon.
2057 ** `random' by default now returns a different random sequence in
2058 every Emacs run. Use `(random S)', where S is a string, to set the
2059 random seed to a value based on S, in order to get a repeatable
2060 sequence in later calls.
2062 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2063 that substring is inserted literally even if the LITERAL arg is
2064 non-nil, instead of causing an error to be signaled.
2066 ** `select-window' now always makes the window's buffer current.
2067 It does so even if the window was selected before.
2069 ** The function `x-select-font' can return a font spec, instead of a
2070 font name as a string. Whether it returns a font spec or a font name
2071 depends on the graphical library.
2073 ** `face-spec-set' no longer sets frame-specific attributes when the
2074 third argument is a frame (that usage was obsolete since Emacs 22.2).
2076 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2078 ** The CL package's `get-setf-method' function no longer exists.
2079 Generalized variables are now part of core Emacs Lisp, and implemented
2080 differently to the way cl.el used to do it. It is not possible to
2081 define a compatible replacement for `get-setf-method'. See the file
2082 gv.el for internal details of the new implementation.
2084 ** The arguments of `dbus-register-signal' are no longer just strings,
2085 but keywords or keyword-string pairs. The old argument list will
2086 still be supported for Emacs 24.x.
2088 ** Miscellaneous name changes
2089 Some Lisp symbols have been renamed to correct their spelling,
2090 or to be more consistent with standard Emacs terminology.
2092 *** Renamed functions
2093 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2094 **** inactivate-input-method -> deactivate-input-method
2095 **** quail-inactivate -> quail-deactivate
2096 **** robin-inactivate -> robin-deactivate
2097 **** viper-inactivate-input-method -> viper-deactivate-input-method
2098 **** viper-inactivate-input-method-action ->
2099 viper-deactivate-input-method-action
2100 **** ucs-input-inactivate -> ucs-input-deactivate
2103 The old hooks are still supported for backward compatibility, but they
2104 are deprecated and will be removed eventually.
2105 **** input-method-inactivate-hook -> input-method-deactivate-hook
2106 **** robin-inactivate-hook -> robin-deactivate-hook
2107 **** quail-inactivate-hook -> quail-deactivate-hook
2109 *** Renamed variables
2110 **** follow-deactive-menu -> follow-inactive-menu
2111 **** inactivate-current-input-method-function ->
2112 deactivate-current-input-method-function
2114 ** Some obsolete functions, variables, and faces have been removed:
2115 *** `last-input-char', `last-command-char', `unread-command-char'
2116 *** `facemenu-unlisted-faces'
2117 *** `rmail-decode-mime-charset'
2118 *** `iswitchb-read-buffer'
2119 *** `sc-version', `sc-submit-bug-report'
2120 *** `set-char-table-default'
2121 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2122 *** `compile-internal'
2124 *** `mode-line-inverse-video'
2125 *** `follow-mode-off-hook'
2126 *** `cvs-commit-buffer-require-final-newline'
2127 (use `log-edit-require-final-newline' instead)
2128 *** `cvs-changelog-full-paragraphs'
2129 (use `log-edit-changelog-full-paragraphs' instead)
2130 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2131 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2132 *** `vc-master-templates' (use `vc-handled-backends' instead)
2133 *** `vc-checkout-carefully'
2136 * Lisp Changes in Emacs 24.3
2138 ** CL-style generalized variables are now in core Elisp.
2139 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2140 You can define your own generalized variables using `gv-define-simple-setter',
2141 `gv-define-setter', etc.
2143 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2144 This can significantly speed up execution of non-byte-compiled code,
2145 but can also bump into previously unnoticed cyclic dependencies.
2146 These are generally harmless: they will simply cause the macro calls
2147 to be left for later expansion (as before), but will result in a
2148 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2149 You may wish to restructure your code so this does not happen.
2151 ** New sampling-based Elisp profiler.
2152 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2153 When finished, use M-x profiler-stop. The sampling rate can be based on
2154 CPU time or memory allocations.
2156 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2157 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2159 ** New macros `setq-local' and `defvar-local'.
2161 ** Face underlining can now use a wave.
2163 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2164 of `read-regexp' accepts a string ending with a colon and space, and its
2165 second argument DEFAULTS can be a list of strings accessible via `M-n'
2166 in the minibuffer ahead of other hard-coded useful regexp-related values.
2167 More commands use `read-regexp' now to read their regexp arguments.
2171 *** New function `completion-table-with-quoting' to handle completion
2172 in the presence of quoting, such as file completion in shell buffers.
2174 *** New function `completion-table-subvert' to use an existing completion
2175 table, but with a different prefix.
2179 *** New error type and new function `user-error'.
2180 These do not trigger the debugger.
2182 *** New option `debugger-bury-or-kill', saying what to do with the
2183 debugger buffer when exiting debug.
2185 *** Set `debug-on-message' to enter the debugger when a certain
2186 message is displayed in the echo area. This can be useful when trying
2187 to work out which code is doing something.
2189 *** New var `inhibit-debugger', automatically set to prevent accidental
2190 recursive invocations.
2194 *** New command `fit-frame-to-buffer' adjusts the frame height to
2197 *** The command `fit-window-to-buffer' can adjust the frame height
2198 if the new option `fit-frame-to-buffer' is non-nil.
2200 *** New macro `with-temp-buffer-window', similar to
2201 `with-output-to-temp-buffer'.
2203 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2206 *** New option `switch-to-buffer-preserve-window-point' to restore a
2207 window's point when switching buffers.
2209 *** New display action alist entries `window-height' and `window-width'
2210 specify the size of new windows created by `display-buffer'.
2212 *** New display action alist entry `pop-up-frame-parameters', if
2213 non-nil, specifies frame parameters to give any newly-created frame.
2215 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2216 tells display action functions to avoid changing which frame is
2219 *** New display action alist entry `previous-window', if non-nil,
2220 specifies window to reuse in `display-buffer-in-previous-window'.
2222 *** New display action functions `display-buffer-below-selected',
2223 and `display-buffer-in-previous-window'.
2225 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2226 now accept a third argument to avoid choosing the selected window.
2228 *** Additional values recognized for option `window-combination-limit'.
2230 *** The following variables are obsolete, as they can be replaced by
2231 appropriate entries in the `display-buffer-alist' function introduced
2233 **** `dired-shrink-to-fit'
2234 **** `display-buffer-reuse-frames'
2235 **** `display-buffer-function'
2236 **** `special-display-buffer-names'
2237 **** `special-display-frame-alist'
2238 **** `special-display-function'
2239 **** `special-display-regexps'
2243 *** `current-time-string' no longer requires that its argument's year
2244 must be in the range 1000..9999. It now works with any year supported
2245 by the underlying C implementation.
2247 *** `current-time' now returns extended-format time stamps
2248 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2249 PSEC is typically a multiple of 1000 on current machines. Other
2250 functions that use this format, such as `file-attributes' and
2251 `format-time-string', have been changed accordingly. Old-format time
2252 stamps are still accepted.
2254 *** The format of timers in `timer-list' and `timer-idle-list' is now
2255 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2256 The PSECS slot is new, and uses picosecond resolution. It can be
2257 accessed via the new `timer--psecs' accessor.
2259 *** Last-modified time stamps in undo lists now are of the form
2260 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2264 *** Improved security when handling persistent objects:
2266 **** `eieio-persistent-read' now features optional arguments for specifying
2267 the class to load, as well as a flag stating whether subclasses are allowed;
2268 if provided, other classes will be rejected by the reader. For
2269 compatibility with existing code, if the class is omitted only a
2272 **** New specialized reader for pulling in classes and signaling errors
2273 without evaluation of suspicious code.
2275 **** All slots that contain objects must have a :type. Slots with lists
2276 of objects must use a new type predicate for a list of an object type.
2278 *** Support for `find-function' and similar utilities, through the addition
2279 of filename support to generated symbols.
2281 ** Floating point functions now always return special values like NaN,
2282 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2283 Previously, they returned NaNs on some platforms but signaled errors
2284 on others. The affected functions are acos, asin, tan, exp, expt,
2285 log, log10, sqrt, and mod.
2287 ** New fringe bitmap `exclamation-mark'.
2289 ** Miscellaneous changes to special forms and macros
2291 *** `defun' and `defmacro' are now macros rather than special forms.
2293 *** `kbd' is now a function rather than a macro.
2295 ** Miscellaneous new functions
2297 *** `set-temporary-overlay-map' sets up a temporary keymap that
2298 takes precedence over most other maps for a short while (normally one key).
2300 *** `autoloadp' tests if its argument is an autoloaded object.
2302 *** `autoload-do-load' performs the autoloading operation.
2304 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2306 *** `file-name-base' returns a file name sans directory and extension.
2308 *** `function-get' fetches a function property, following aliases.
2310 *** `posnp' tests if an object is a `posn'.
2312 *** `system-users' returns the user names on the system.
2314 *** `system-groups' returns the group names on the system.
2316 *** `tty-top-frame' returns the topmost frame of a text terminal.
2318 ** The following functions and variables are obsolete:
2319 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2320 *** `buffer-has-markers-at'
2321 *** `macro-declaration-function' (use `macro-declarations-alist')
2322 *** `window-system-version' (provides no useful information)
2323 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2324 *** `query-replace-interactive'
2325 *** `font-list-limit' (has had no effect since Emacs < 23)
2328 * Changes in Emacs 24.3 on Non-Free Operating Systems
2330 ** Cygwin builds can use the native MS Windows user interface.
2331 Pass `--with-w32' to configure. The default remains the X11 interface.
2333 ** Two new functions are available in Cygwin builds:
2334 `cygwin-convert-file-name-from-windows' and
2335 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2336 code to access the Cygwin file-name mapping machinery to convert
2337 between Cygwin and Windows-native file and directory names.
2339 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2340 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2341 `mouse-autoselect-window'.
2343 ** On MS Windows Vista and later Emacs now supports symbolic links.
2345 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2346 support for libxml2, even if its presence is detected.
2348 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2350 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2351 directories to the search path. You must add them yourself if you want them.
2354 * Changes in Emacs 24.2
2356 ** This is mainly a bug-fix release.
2359 * Installation Changes in Emacs 24.1
2361 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2362 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2363 also depend on Gtk+. You can disable them with --without-rsvg and
2366 ** Emacs can be compiled with GnuTLS support.
2367 This happens by default if a suitably recent version of the library is
2368 found at build time. To prevent this, use the configure option
2369 `--without-gnutls'. See below for GnuTLS features.
2371 ** Emacs can be compiled with SELinux support.
2372 This happens by default if a suitably recent version of the library is
2373 found at build time. To prevent this, use the configure option
2374 `--without-selinux'. See below for SELinux features.
2376 ** Emacs can be compiled with ImageMagick support.
2377 This happens by default if a suitably recent version of the library is
2378 found at build time. To prevent this, use the configure option
2379 `--without-imagemagick'. See below for ImageMagick features.
2380 This feature is not available for the Nextstep or MS ports.
2382 ** Emacs can be compiled with libxml2 support.
2383 This happens by default if a suitably recent version of the library is
2384 found at build time. To prevent this, use the configure option
2385 `--without-xml2'. See below for libxml2 features.
2387 ** By default, the installed Info and man pages are compressed.
2388 You can disable this by configuring --without-compress-info.
2390 ** New configure option --with-wide-int.
2391 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2392 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2395 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2396 These provide no new functionality, they just remove the need to edit
2397 lib-src/Makefile by hand in order to use the associated features.
2399 ** New configure option --enable-use-lisp-union-type.
2400 This is only useful for Emacs developers to debug certain types of bugs.
2401 This is not a new feature; only the configure flag is new.
2403 ** The standalone programs digest-doc and sorted-doc are removed.
2404 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2406 ** The standalone program `fakemail' is removed.
2407 If you need it, feedmail.el provides a superset of the functionality.
2410 * Startup Changes in Emacs 24.1
2412 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2413 command line arguments, and the EMACS_UNIBYTE environment variable, no
2414 longer have any effect. (They were declared obsolete in Emacs 23.)
2416 ** New command line option `--no-site-lisp' removes site-lisp directories
2417 from load-path. -Q now implies this. This option does not affect the
2418 EMACSLOADPATH environment variable (and hence has no effect for
2422 * Changes in Emacs 24.1
2426 *** Many packages now use the `completion-at-point' command,
2427 rather than implementing separate completion commands.
2429 *** `completion-at-point' now handles tags and semantic completion.
2431 *** Completion in a non-minibuffer now tries to detect the end of completion
2432 and pops down the *Completions* buffer accordingly.
2434 *** New option `completion-cycle-threshold' allows completion cycling.
2436 *** New option `completion-category-overrides' for overriding the
2437 default completion style in certain circumstances.
2439 *** New completion style `substring'.
2441 *** Completion of buffer names uses `substring' completion by default.
2443 *** The option `widget-complete-field' has been removed.
2447 *** The first time you try sending mail, Emacs asks for a mail method.
2448 This is implemented by a new default for `send-mail-function', which
2449 is `sendmail-query-once'. This offers to use the smtpmail package, or
2450 to use the old defaults relying on external mail facilities
2451 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2452 `mailclient-send-it' on Windows).
2454 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2455 transfers the report to your desktop's preferred mail client, if there
2456 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2459 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2460 and Mail mode changes
2462 ** Emacs server and client changes
2464 *** New option `server-port' specifies the port for TCP Emacs servers.
2466 *** New emacsclient argument -q/--quiet suppresses some status messages.
2468 *** New emacsclient argument --frame-parameters specifies the frame
2469 parameters of any newly-created graphical frame.
2471 *** If emacsclient shuts down due to Emacs signaling an error,
2472 its exit status is 1.
2474 *** New emacsclient argument --parent-id ID.
2475 This opens a client frame in parent X window ID, via XEmbed, similar
2476 to the --parent-id argument to Emacs.
2478 ** Internationalization changes
2480 *** Emacs now supports display and editing of bidirectional text.
2481 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2482 displayed in the correct visual order as expected by users of those
2483 scripts. The display reordering is a "full bidirectionality" class
2484 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2485 with no RTL text should look exactly the same as before.
2487 **** New buffer-local variable `bidi-display-reordering'.
2488 To disable display reordering in a buffer, change this to nil.
2490 **** New buffer-local variable `bidi-paragraph-direction'.
2491 If nil (the default), Emacs determines the base direction of each
2492 paragraph from its text, as specified by the UBA. Setting the value
2493 to `right-to-left' or `left-to-right' forces a base direction on each
2496 Paragraphs with right-to-left base direction are displayed starting at
2497 the right window edge.
2499 *** Enhanced support for characters with no glyphs in available fonts,
2500 or, on text terminals, characters that cannot be encoded by the
2501 terminal coding system. The new option `glyphless-char-display-control'
2502 specifies how to display them: as a hexadecimal code in a box, a thin
2503 1-pixel space, an empty box, etc.
2505 *** New input methods for Farsi and Bulgarian
2506 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2508 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2509 (U+2010 and U+2011).
2511 *** New Hebrew translation of the Emacs Tutorial.
2512 Type `C-u C-h t' to choose it in case your language setup doesn't
2513 automatically select it.
2515 ** An Emacs Lisp package manager is now included.
2516 This is a convenient way to download and install additional packages,
2517 from a package repository at http://elpa.gnu.org.
2519 *** M-x list-packages shows a list of packages, which can be
2520 selected for installation.
2522 *** New command `describe-package', bound to `C-h P'.
2524 *** By default, all installed packages are loaded automatically when
2525 Emacs starts up. To disable this, set `package-enable-at-startup' to
2526 nil. To specify the packages to load, customize `package-load-list'.
2528 ** Custom theme changes
2530 *** New command `M-x customize-themes', which provides a convenient
2531 interface for enabling and disabling Custom themes.
2533 *** New option `custom-theme-load-path' is the load path for themes.
2534 Emacs no longer looks for Custom themes in `load-path'. The default
2535 value of `custom-theme-load-path' says to look for themes in
2536 `custom-theme-directory', followed by a subdirectory of
2537 `data-directory' named "themes/", which contains a small selection of
2538 built-in Custom themes.
2540 *** New option `custom-safe-themes' records known-safe theme files.
2541 If a theme is not in this list, Emacs queries before loading it, and
2542 offers to save the theme to `custom-safe-themes' automatically. By
2543 default, all themes included in Emacs are treated as safe.
2545 ** Improved GTK integration
2547 *** GTK scroll-bars are now placed on the right by default.
2548 The function `set-scroll-bar-mode' can change this.
2550 *** GTK tool bars can have just text, just images or images and text.
2551 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2552 the default is taken from desktop settings.
2554 *** GTK tool bars can be placed on any edge of the frame.
2555 The frame-parameter tool-bar-position controls this. It takes the
2556 values top, left, right or bottom. The Options => Show/Hide menu has
2559 *** The default colors for selected text (the `region' face) are taken
2560 from the GTK theme when Emacs is built with GTK.
2562 *** Emacs uses GTK tooltips by default if built with GTK.
2563 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2565 ** Graphical interface changes
2567 *** On graphical displays, the mode-line no longer ends in dashes.
2568 Also, the first dash (which does not indicate anything) is just
2569 displayed as a space.
2571 *** `menu-bar-select-buffer-function' lets you choose another operation
2572 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2574 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2575 built with Xft. These fonts can be set via X resources, for example:
2576 Emacs.pane.menubar.font: Courier-12
2580 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2581 or if it receives a SIGINT signal in batch mode.
2583 *** `kill-emacs-hook' is now also run in batch mode.
2584 Third-party code which adds to `kill-emacs-hook' should check if they
2585 do the right thing in batch mode.
2587 ** Scrolling changes
2589 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2590 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2591 of buffer at first key-press (instead they move to top/bottom of buffer)
2592 when `scroll-error-top-bottom' is non-nil.
2594 *** New option `scroll-error-top-bottom' (see above).
2596 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2597 scroll a line instead of full screen.
2599 *** New property `scroll-command' should be set on a command's symbol to
2600 define it as a scroll command affected by `scroll-preserve-screen-position'.
2602 *** If you customize `scroll-conservatively' to a value greater than 100,
2603 Emacs will never recenter point in the window when it scrolls due to
2604 cursor motion commands or commands that move point (e.f., `M-g M-g').
2605 Previously, you needed to use `most-positive-fixnum' as the value of
2606 `scroll-conservatively' to achieve the same effect.
2608 *** "Aggressive" scrolling now honors the scroll margins.
2609 If you customize `scroll-up-aggressively' or
2610 `scroll-down-aggressively' and move point off the window, Emacs now
2611 scrolls the window so as to avoid positioning point inside the scroll
2614 ** Basic SELinux support has been added.
2615 This requires Emacs to be linked with libselinux at build time.
2617 *** Emacs preserves the SELinux file context when backing up.
2618 Also, the function `copy-file' has an extra optional argument for
2619 preserving SELinux context, and the return value of `backup-buffer'
2620 now includes the SELinux context.
2622 *** New functions `file-selinux-context' and `set-file-selinux-context'
2623 get and set the SELinux context of a file.
2627 *** `delete-by-moving-to-trash' now only affects commands that specify
2628 trashing. This avoids inadvertently trashing temporary files.
2630 *** Calling `delete-file' or `delete-directory' with a prefix argument
2631 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2633 ** File- and directory-local variable changes
2635 *** You can stop directory local vars from applying to subdirectories.
2636 Add an element (subdirs . nil) to the alist portion of any variables
2637 settings to indicate that the section should not apply to
2640 *** Directory local variables can apply to some file-less buffers.
2641 Affected modes include dired, vc-dir, and log-edit. For example,
2642 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2643 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2644 `hack-dir-local-variables-non-file-buffer' to support this.
2646 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2647 Instead, use "eval: (minor-mode 1)".
2649 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2650 to `inhibit-local-variables-regexps'. As the name suggests, it now
2651 applies to ALL file local variables, not just -*- lines. The
2652 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2657 *** The `quit-window' command now restores the last buffer displayed
2658 in the quitted window.
2660 *** Resizing an Emacs frame now preserves proportional window sizes,
2661 modulo restrictions like window minimum sizes and fixed-size windows.
2663 *** The behavior of `display-buffer' is now customizable in detail.
2665 **** New option `display-buffer-base-action' specifies a list of
2666 user-determined display "actions" (functions and optional arguments
2667 for choosing the displaying window).
2669 This takes precedence over the default display action, which is
2670 specified by `display-buffer-fallback-action'.
2672 **** New option `display-buffer-alist' maps buffer name regexps to
2673 display actions, taking precedence over `display-buffer-base-action'.
2675 *** New option `window-combination-limit'.
2676 The new option `window-combination-limit' allows to return the space
2677 obtained for resizing or creating a window more reliably to the window
2678 from which such space was obtained.
2680 *** New option `window-combination-resize'.
2681 The new option `window-combination-resize' allows to split a window that
2682 otherwise cannot be split because it's too small by stealing space from
2683 other windows in the same combination. Subsequent resizing or deletion
2684 of the window will resize all windows in the same combination as well.
2686 *** New option `frame-auto-hide-function' lets you choose between
2687 iconifying or deleting a frame when burying a buffer in a dedicated
2688 frame, or quitting a window showing a buffer in a frame of its own.
2690 *** New commands `maximize-window' and `minimize-window'.
2691 These maximize and minimize the size of a window within its frame.
2693 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2694 These functions allow to navigate through the live buffers that have
2695 been shown in a specific window.
2697 ** Minibuffer changes
2699 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2700 This is handy for minibuffer-only frames, and is also used for the feature
2701 where mouse-1 pops up *Messages*"', which can now easily be changed.
2703 *** Minibuffers set `truncate-lines' to nil.
2704 If you want to change the value to something else, you could use
2705 for example `minibuffer-setup-hook'.
2707 ** `auto-mode-case-fold' is now enabled by default.
2709 ** `backup-by-copying-when-mismatch' now defaults to t.
2711 ** New basic faces `error', `warning', `success'.
2712 These are used to highlight text indicating failure, caution or
2713 successful operation.
2715 ** New option `list-colors-sort' defines the color sort order
2716 for `list-colors-display'.
2718 ** The variable `focus-follows-mouse' now always defaults to nil.
2721 * Editing Changes in Emacs 24.1
2725 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2726 `isearch-yank-line'.
2728 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2729 `isearch-yank-kill'.
2731 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2733 ** New commands `count-words-region' and `count-words'.
2735 *** M-= is bound to `count-words-region', not `count-lines-region'.
2736 The `count-words-region' command, when called interactively, reports
2737 the number of lines, words, and characters in the region. It is a
2738 superset of the old `count-lines-region', which is now an obsolete
2741 ** The command `just-one-space' (M-SPC), if given a negative argument,
2742 also deletes newlines around point.
2746 *** New option `delete-active-region'.
2747 If non-nil, [delete] and DEL delete the region if it is active and no
2748 prefix argument is given. If set to `kill', those commands kill
2751 *** New command `delete-forward-char', bound to [delete].
2752 This is meant for interactive use, and obeys `delete-active-region'.
2753 The command `delete-char' does not obey `delete-active-region'.
2755 *** `delete-backward-char' is now a Lisp function.
2756 Apart from obeying `delete-active-region', its behavior is unchanged.
2757 However, the byte compiler now warns if it is called from Lisp; Lisp
2758 callers should use delete-char with a negative argument instead.
2760 *** The option `mouse-region-delete-keys' has been deleted.
2762 ** Selection changes.
2764 The default handling of clipboard and primary selections has been
2765 changed to conform with modern X applications. In short, most
2766 commands for killing and yanking text now use the clipboard, while
2767 mouse commands use the primary selection.
2769 In the following, we provide a list of these changes, followed by a
2770 list of steps to get the old behavior back if you prefer that.
2772 *** `select-active-regions' now defaults to t.
2773 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2774 the kill ring. The selected text is put in the primary selection, if
2775 the system possesses a separate primary selection facility (e.g. X).
2777 **** `select-active-regions' also accepts a new value, `only'.
2778 This means to only set the primary selection for temporarily active
2779 regions (usually made by mouse-dragging or shift-selection);
2780 "ordinary" active regions, such as those made with C-SPC followed by
2781 point motion, do not alter the primary selection.
2783 **** `mouse-drag-copy-region' now defaults to nil.
2785 *** mouse-2 is now bound to `mouse-yank-primary'.
2786 This pastes from the primary selection, ignoring the kill-ring.
2787 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2789 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2791 *** `x-select-enable-primary' now defaults to nil.
2792 Thus, commands that kill text or copy it to the kill-ring (such as
2793 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2795 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2796 exactly equivalent to M-w, C-w, and C-y respectively.
2798 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2799 non-nil by default, as Windows does not support the primary selection
2800 between applications.
2802 *** To return to the previous behavior, do the following:
2804 **** Change `select-active-regions' to nil.
2805 **** Change `mouse-drag-copy-region' to t.
2806 **** Change `x-select-enable-primary' to t (on X only).
2807 **** Change `x-select-enable-clipboard' to nil.
2808 **** Bind `mouse-yank-at-click' to mouse-2.
2810 *** Support for X cut buffers has been removed.
2812 *** X clipboard managers are now supported.
2813 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2815 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2816 in the current rectangle. With a prefix argument, this prompts for a
2817 number to count from and for a format string.
2819 ** `redisplay-dont-pause' now defaults to t.
2820 This makes Emacs feel more responsive to editing commands that arrive
2821 at high rate, e.g. if you lean on some key, because stopping redisplay
2822 in the middle (when this variable is nil) forces more expensive
2823 updates later on, and Emacs appears to be unable to keep up.
2825 ** The behavior of <TAB> for active regions in Text mode has changed.
2826 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2827 when the region is active causes Emacs to indent all the lines in the
2828 region, aligning them with the line previous to the first line in the
2829 region (or with the left margin if there is no previous line).
2831 ** When `occur' is called with a prefix argument, matching strings are
2832 collected into the `*Occur*' buffer without line numbers. If there
2833 are parenthesized subexpressions in the specified regexp, `occur'
2834 reads replacement text that may contain \\& and \\N whose convention
2835 follows `replace-match'.
2838 * Changes in Specialized Modes and Packages in Emacs 24.1
2840 ** Archive Mode has basic support for browsing and updating 7z archives.
2844 *** BibTeX mode now supports biblatex.
2845 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2846 `bibtex-entry-field-alist' is now an obsolete alias for
2847 `bibtex-BibTeX-entry-alist'.
2849 *** New command `bibtex-search-entries', bound to C-c C-a.
2851 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2853 *** New variable `bibtex-search-entry-globally'.
2857 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2859 *** The default browser used by the package is now the "xdg-open" program,
2860 on platforms that support it. This calls your desktop's preferred browser.
2864 *** Support for musical notes.
2866 *** Support for logarithmic units.
2868 *** No longer uses the tex prefix for TeX specific unit names when
2869 using TeX or LaTeX mode.
2871 *** New option to highlight selections using faces.
2873 *** `calc-histogram' has the option of using a vector to determine the bins.
2875 *** New "O" option prefix.
2877 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2879 ** Calendar, Diary, and Appt
2881 *** Diary entries can contain non-printing "comments".
2882 See the variable `diary-comment-start'.
2884 *** Appointments can specify their individual warning times.
2885 See the variable `appt-warning-time-regexp'.
2887 *** The function specified by `appt-disp-window-function' may be passed
2888 lists of arguments if multiple appointments are due at similar times.
2889 If you are using a custom function for this, you should update it.
2891 *** New function `diary-hebrew-birthday'.
2893 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2894 may no longer be nil, but must all be strings.
2896 *** The obsolete (since Emacs 22.1) method of enabling the appt
2897 package by adding `appt-make-list' to `diary-hook' has been removed.
2898 Use `appt-activate' instead.
2900 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2901 appt-issue-message (use the function appt-activate)
2902 appt-visible/appt-msg-window (use the variable appt-display-format)
2904 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2905 view-diary-entries, list-diary-entries, show-all-diary-entries
2909 *** New feature to "guess" the style in an existing buffer.
2910 The main entry point is M-x c-guess.
2912 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2914 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2915 Thus C-M-a will, by default, go to the beginning of the immediate function,
2918 *** "Macros with semicolons" can be registered for correct indentation.
2919 Where such a macro ends a line (no semicolon) the next statement is no longer
2920 parsed as a statement continuation.
2922 ** Comint and modes derived from it use the standard completion code.
2926 *** Compilation mode can be used without Font Lock mode.
2927 `compilation-parse-errors-function' is now obsolete.
2929 *** New variable `compilation-filter-start', which is bound while
2930 `compilation-filter-hook' runs. It records the start position of the
2931 text inserted by `compilation-filter'.
2933 *** `compilation-error-screen-columns' and `compilation-first-column'
2934 are obeyed in the editing buffer. So programming language modes can
2935 set them, whereas previously only the value in the *Compilation*
2940 *** Customize buffers now contain a search field.
2941 The search is performed using `customize-apropos'.
2942 To turn off the search field, set `custom-search-field' to nil.
2944 *** Options in customize group buffers start out hidden if not customized.
2945 Use the arrow to the left of the option name to toggle visibility.
2947 *** custom-buffer-sort-alphabetically now defaults to t.
2949 *** The color widget now has a "Choose" button, which allows you to
2950 choose a color via `list-colors-display'.
2954 *** It is now possible to access buses other than the default system
2957 *** The `dbus-register-method' and `dbus-register-property' functions
2958 optionally do not register names.
2960 *** The new function `dbus-register-service' registers a known service
2961 name on a D-Bus without also registering a property or a method.
2965 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2966 if called with a prefix argument, read a file name from the minibuffer
2967 instead of using the current buffer.
2969 *** The "dired local variables" feature of Dired-x is obsolete.
2970 The standard directory local variables feature replaces it.
2974 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2975 controlling attempts to autojoin a channel.
2977 *** New variable `erc-coding-system-precedence': If we use `undecided'
2978 as the server coding system, this variable will then be consulted.
2979 The default is to decode strings that can be decoded as utf-8 as
2980 utf-8, and do the normal `undecided' decoding for the rest.
2984 *** The default value of `eshell-directory-name' has changed
2985 to be an "eshell" directory in `user-emacs-directory'.
2986 The old "~/.eshell/" directory is still used if it exists, though.
2990 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2991 It now supports multithread non-stop debugging and simultaneous
2992 debugging of several threads.
2996 *** RET (`image-toggle-animation') toggles animation, if applicable.
2997 Animation plays once, unless the option `image-animate-loop' is non-nil.
3001 *** New command M-x info-display-manual displays a named Info manual.
3002 If that manual is already visited in some Info buffer, it displays
3003 that buffer. (This is handy if you have many manuals in many *info*
3004 buffers, and don't remember the name of the buffer visiting the manual
3005 you want to consult.) Otherwise, it loads and displays the manual.
3007 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3008 This is for compatibility with the stand-alone Info reader program,
3009 and also because `Info-edit' is a rarely used command that is disabled
3012 ** Mail mode changes (not Message mode)
3014 *** New command M-x mail-add-attachment for adding MIME attachments
3016 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3017 (Its name is misleading, since it has nothing to do with MIME
3018 attachments.) The old name is now an obsolete alias to the new name.
3020 ** MH-E has been updated to MH-E version 8.3.1.
3021 See MH-E-NEWS for details.
3023 ** Modula-2 mode provides auto-indentation.
3025 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3027 ** nXML mode no longer binds C-RET to `nxml-complete'.
3028 Completion is now performed via `completion-at-point', bound to C-M-i
3029 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3030 default), this performs tag completion.
3032 ** Org mode has been updated to version 7.8.09.
3033 See ORG-NEWS for details.
3035 ** Prolog mode has been completely revamped, with lots of additional
3036 functionality such as more intelligent indentation, electricity,
3037 support for more variants, including Mercury, and a lot more.
3041 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3042 in the Rmail incoming message.
3044 *** The variable `rmail-message-filter' no longer has any effect.
3045 This change was made in Emacs 23.1 but was not advertised at the time.
3046 Try using `rmail-show-message-hook' instead.
3050 *** M-x shell prompts for the shell path name if the default directory
3051 is a remote file name and neither the environment variable $ESHELL nor
3052 the variable `explicit-shell-file-name' is set.
3054 *** TAB is now bound to the standard `completion-at-point' command,
3055 which now implements the pcomplete rules for shell command completion.
3059 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3060 if the mail server supports them. This uses either built-in GnuTLS
3061 support, or the starttls.el library. Customize `smtpmail-stream-type'
3064 *** The variable `smtpmail-auth-credentials' has been removed.
3065 By default, the information is now stored in the file ~/.authinfo.
3066 This was the default value of smtpmail-auth-credentials. If you had
3067 customized smtpmail-auth-credentials to a list of user names and
3068 passwords, those settings are not used. During your first connection
3069 to the smtp server, Emacs will prompt for the user name and password,
3070 and offer to save them to ~/.authinfo. Or you can manually copy the
3071 credentials to ~/.authinfo. For example, if you had
3073 (setq smtpmail-auth-credentials
3074 '(("mail.example.org" 25 "jim" "s!cret")))
3076 then the equivalent line in ~/.authinfo would be
3078 machine mail.example.org port 25 login jim password s!cret
3080 See the auth-source manual for more information, e.g. on encrypting
3081 the credentials file.
3083 *** The variable `smtpmail-starttls-credentials' has been removed.
3084 If you had that set, you need to put
3086 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3088 in your ~/.authinfo file instead.
3090 *** SMTPmail defaults to using the address in the From: header as the
3091 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3092 to the address you wish to use instead.
3096 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3097 and `sql-oracle-scan-on'.
3099 *** New options controlling prompting for login parameters.
3100 Each supported product has a custom variable `sql-*-login-params',
3101 which is a list of the parameters to be prompted for before a
3102 connection is established.
3104 *** The command `sql-product-interactive' now takes a prefix argument,
3105 which causes it to prompt for an SQL product.
3107 *** Product-specific SQL interactive commands now take prefix arguments.
3108 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3109 given a prefix argument, prompt for a name for the SQL interactive
3110 buffer. This reduces the need for calling `sql-rename-buffer'.
3112 *** SQL interactive modes suppress command continuation prompts, and
3113 replace tabs with spaces. The first change impacts multiple line SQL
3114 statements entered with C-j between each line, statements yanked into
3115 the buffer and statements sent with `sql-send-*' functions. The
3116 second prevents the MySQL and Postgres interpreters from listing
3117 object name completions when sent text via `sql-send-*' functions.
3119 *** New command `sql-connect' starts a predefined SQLi session,
3120 using the login parameters from `sql-connection-alist'.
3122 *** New "Save Connection" menu item in SQLi buffers.
3123 This gathers the login params specified for the SQLi session, if it
3124 was not started by a connection, and saves them as a new connection.
3126 *** New commands for listing database objects and details:
3127 sql-list-all and sql-list-table.
3129 *** An API for manipulating SQL product definitions has been added.
3133 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3137 *** New inline access method "ksu" (kerberized su).
3139 *** The following access methods are discontinued: "ssh1_old",
3140 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3142 *** The user option `remote-file-name-inhibit-cache' controls whether
3143 remote file attributes are cached for better performance.
3145 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3146 default value to "".
3148 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3149 for remote machines which support SELinux.
3151 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3152 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3153 the degree of parallelism.
3155 ** VC and related modes
3157 *** Support for pulling on distributed version control systems.
3158 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3159 supported (currently with Bzr, Git, and Mercurial), to update the
3160 current branch and working tree. A prefix argument means to prompt
3161 the user for specifics, e.g. a pull location.
3163 *** `vc-update' is now an alias for `vc-pull'.
3165 *** Support for merging on distributed version control systems.
3166 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3167 is supported (currently with Bzr, Git, and Mercurial), to merge
3168 changes from another branch into the current one. It prompts for
3169 specifics, e.g. a merge source.
3171 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3172 shows a diff while querying the user. It defaults to t.
3174 *** Log entries in some Log View buffers can be toggled to display a
3175 longer description by typing RET (log-view-toggle-entry-display).
3176 This is currently supported for Bzr, Git, and Mercurial (to support
3177 another backend, define a `log-view-expanded-log-entry-function').
3178 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3179 use this to display the full log entry for the revision at point.
3181 *** New command `vc-ediff' allows visual comparison of two revisions
3182 of a file similar to `vc-diff', but using ediff backend.
3184 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3185 this was not advertised at the time.
3187 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3188 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3189 this was not advertised at the time.
3195 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3197 *** partial-completion-mode (complete.el) is obsolete.
3198 You can get a comparable behavior with:
3199 (setq completion-styles '(partial-completion initials))
3200 (setq completion-pcm-complete-word-inserts-delimiters t)
3202 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3204 *** pgg is obsolete (use EasyPG instead).
3206 *** sregex.el is obsolete, since rx.el is a strict superset.
3208 *** s-region.el and pc-select.el are obsolete.
3209 They are superseded by shift-select-mode, enabled by default since 23.1.
3211 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3215 *** The Landmark game is now invoked with `landmark', not `lm'.
3216 Its functions and variables have been similarly renamed.
3218 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3219 (This interfered with cua-mode.)
3221 *** f90.el has some support for Fortran 2008 syntax.
3223 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3225 *** New command `nato-region' converts text to NATO phonetic alphabet.
3228 * New Modes and Packages in Emacs 24.1
3230 ** Occur Edit mode applies edits made in *Occur* buffers to the
3231 original buffers. It is bound to "e" in Occur mode.
3233 ** New global minor mode electric-pair-mode.
3234 When enabled, typing an open parenthesis automatically inserts the
3235 matching closing one.
3237 ** New global minor mode electric-indent-mode.
3238 When enabled, typing certain characters triggers reindentation.
3239 Major modes wishing to use this can set electric-indent-chars or
3240 electric-indent-functions.
3242 ** New global minor mode electric-layout-mode.
3243 When enabled, typing certain characters automatically inserts newlines.
3244 Major modes wishing to use this can set electric-layout-rules.
3246 ** tabulated-list.el provides a generic major mode for tabulated data,
3247 from which other modes can be derived.
3249 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3251 ** secrets.el is an implementation of the Secret Service API, an
3252 interface to password managers like GNOME Keyring or KDE Wallet. The
3253 Secret Service API requires D-Bus for communication. The command
3254 `secrets-show-secrets' offers a buffer with a visualization of the
3257 ** notifications.el provides an implementation of the Desktop
3258 Notifications API. It requires D-Bus for communication.
3260 ** soap-client.el supports access to SOAP web services from Emacs.
3261 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3263 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3265 ** New emacs-lock.el package.
3266 The previous version has been moved to obsolete/old-emacs-lock.el.
3267 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3268 against exiting Emacs and killing the buffer can be set separately.
3269 The mechanism for automatically turning off protection for buffers
3270 with dead inferior processes has been generalized.
3273 * Incompatible Lisp Changes in Emacs 24.1
3275 ** Passing a nil argument to a minor mode function call now ENABLES
3276 the minor mode unconditionally. This is so that you can write e.g.
3278 (add-hook 'text-mode-hook 'foo-mode)
3280 to enable foo-mode in Text mode buffers, removing the need for
3281 `turn-on-foo-mode' style functions. This affects all mode commands
3282 defined by `define-minor-mode'. If called interactively, the mode
3283 command still toggles the minor mode.
3285 ** The return value of `backup-buffer' has changed.
3286 It is now a list of three elements, where the second element is a list
3287 describing the original file's SELinux context. If Emacs or the
3288 system lacks SELinux support, the context list is (nil nil nil nil).
3289 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3291 ** `char-direction-table' and the `char-direction' function were deleted.
3292 They were buggy and inferior to the new support of bidirectional
3293 editing introduced in Emacs 24. If you need the bidirectional
3294 properties of a character, use `get-char-code-property' with the last
3295 argument `bidi-class'.
3297 ** `copy-directory' now copies the source directory as a subdirectory
3298 of the target directory, if the latter is an existing directory. The
3299 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3300 the contents directly into a pre-existing target directory.
3302 ** For mouse click input events in the text area, the Y pixel
3303 coordinate in the POSITION list now counts from the top of the text
3304 area, excluding any header line. Previously, it counted from the top
3307 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3308 been further reduced. Now a backquote not followed by a space is
3309 always treated as a "new-style" backquote. Please remove all
3310 "old-style" backquotes from your code. If your code uses backquotes
3311 as documented in the Elisp manual, and compiles without warning, then
3312 you have nothing to do in this regard. Code not following the
3313 appropriate conventions may fail to compile.
3315 The most common cause of trouble seems to be an old-style backquote
3316 followed by a newline. Another cause of trouble is vector notation
3317 for key sequence notation: instead of [(control ,)] and [(control ')],
3318 you should write [(control ?,)] and [(control ?')], which will work in
3321 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3322 was not advertised at the time. The function `custom-initialize-delay'
3323 replaced all known uses.
3325 ** `view-buffer' now treats special mode-class in the same way that
3326 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3327 major mode is special).
3329 ** Menu and tool bar changes
3331 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3332 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3333 With these alist entries omitted, `make-frame' checks the value of the
3334 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3335 a menu-bar or tool-bar, respectively. If the alist entries are added,
3336 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3338 *** The menu bar bindings's caches are not used any more.
3339 Use (where-is-internal <def> nil t) instead.
3341 ** Regions created by mouse dragging are now normal active regions,
3342 similar to those created by shift-selection (see Selection changes
3343 above). In previous Emacs versions, these regions were delineated by
3344 `mouse-drag-overlay'; that variable has been removed.
3346 ** The fourth argument of `filter-buffer-substring' has been removed.
3347 If you want to remove text properties from the final result, simply
3348 pass the result through substring-no-properties.
3350 ** cl.el no longer provides `cl-19'.
3352 ** The following obsolete functions and aliases have been removed
3353 (the appropriate new function is given in parentheses; "not needed"
3354 means you can just remove all calls to the function in question):
3356 *** `comint-kill-output' (`comint-delete-output')
3357 *** `decompose-composite-char' (`char-to-string')
3358 *** `outline-visible' (`outline-invisible-p')
3359 *** `internal-find-face' (`facep')
3360 *** `internal-get-face' (`facep and check-face')
3361 *** `frame-update-faces' (not needed)
3362 *** `frame-update-face-colors' (`frame-set-background-mode')
3363 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3364 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3365 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3366 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3367 *** `x-make-font-unbold' (`make-face-unbold')
3368 *** `x-make-font-unitalic' (`make-face-unitalic')
3369 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3370 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3371 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3372 *** `char-bytes' (== 1)
3373 *** `isearch-return-char' (`isearch-printing-char')
3374 *** `make-local-hook' (not needed)
3375 *** `set-screen-height' (`set-frame-height')
3376 *** `set-screen-width' (`set-frame-width')
3378 ** The following obsolete variables and varaliases have been removed
3379 (the appropriate new variable is given in parentheses):
3381 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3382 *** `vc-header-alist' (`vc-BACKEND-header')
3383 *** `directory-sep-char' (== ?/)
3384 *** `font-lock-defaults-alist' (`font-lock-defaults')
3385 *** `e' (`float-e').
3387 ** The following obsolete files were removed:
3388 sc.el, x-menu.el, rnews.el, rnewspost.el
3390 ** The format of the finder-inf.el file has changed, since the Finder
3391 mechanism is now based on the package system. The variable
3392 `finder-package-info' is replaced by `package--builtins' and
3393 `finder-keywords-hash'.
3395 ** When generating autoloads, `update-directory-autoloads' no longer
3396 assumes every inspected file is in your `load-path'. It instead
3397 generates relative names according to the current `load-path'.
3400 * Lisp Changes in Emacs 24.1
3402 ** Code can now use lexical scoping by default instead of dynamic scoping.
3403 The `lexical-binding' variable enables lexical scoping for local
3404 variables. It is typically set via a file-local variable in the first
3405 line of the file, in which case it applies to all the code in that
3408 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3409 binding instead of the old dynamic binding mode.
3411 *** Lexically scoped interpreted functions are represented with a new form
3412 of function value which looks like (closure ENV ARGS &rest BODY).
3414 *** New macro `letrec' to define recursive local functions.
3416 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3417 So do `defcustom' and other forms that call `defvar' as a subroutine.
3419 *** New function `special-variable-p' to check whether a variable is
3420 declared as dynamically bound.
3422 *** The form ((lambda ...) ...) is deprecated.
3424 ** An Emacs Lisp testing tool is now included.
3425 Emacs Lisp developers can use this tool to write automated tests for
3426 their code. See the ERT info manual for details.
3428 ** Changes for bidirectional display and editing
3430 *** New function `current-bidi-paragraph-direction'.
3431 This returns the base direction of the paragraph at point.
3433 *** New function `bidi-string-mark-left-to-right'.
3434 Given a string containing characters from right-to-left scripts, this
3435 function returns another string which can be safely inserted into a
3436 buffer, such that any following text will be always displayed to the
3437 right of that string. (This works by appending an invisible Unicode
3438 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3440 This is useful when the buffer has overall left-to-right paragraph
3441 direction and you need to insert a string whose contents are not known
3442 in advance, without disrupting the layout of the line.
3446 *** Window tree functions are accessible in Elisp.
3447 Functions are provided to return the parent, siblings or child windows
3448 of any window including internal windows (windows not associated with a
3449 buffer) in the window tree.
3451 **** New function `window-valid-p' gives non-nil for live and internal
3454 **** Window manipulation can deal with internal windows.
3455 Many window handling functions like `split-window', `delete-window', or
3456 `delete-other-windows' as well as the window resizing functions can now
3457 act on any window including internal ones.
3459 *** window-total-height/-width vs window-body-height/-width.
3460 The function `window-height' has been renamed to `window-total-height'
3461 and `window-width' has been renamed to `window-body-width'. The old
3462 names are provided as aliases. Two new functions `window-total-width'
3463 and `window-body-height' are provided.
3465 *** Window parameters specific to window handling functions.
3466 For each window you can specify a parameter to override the default
3467 behavior of a number of functions like `split-window', `delete-window'
3468 and `delete-other-windows'. The variable `ignore-window-parameters'
3469 allows to ignore processing such parameters.
3471 *** New semantics of third argument of `split-window'.
3472 The third argument of `split-window' has been renamed to SIDE and can be
3473 set to any of the values 'below, 'right, 'above, or 'left to make the
3474 new window appear on the corresponding side of the window that shall be
3475 split. Any other value of SIDE will cause `split-window' to split the
3476 window into two side-by-side windows as before.
3478 *** Window resizing functions.
3479 A new standard function for resizing windows called `window-resize' has
3480 been introduced. This and all other functions for resizing windows no
3481 longer delete any windows when they become too small.
3483 *** Deleting the selected window now selects the most recently selected
3484 live window on that frame instead.
3486 *** `adjust-window-trailing-edge' adjustments.
3487 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3488 is able to resize other windows if a window adjacent to the trailing
3489 edge cannot be shrunk any more. This makes its behavior more similar to
3490 that of Emacs 21 without compromising, however, its inability to delete
3491 windows which was introduced in Emacs 22.
3493 *** Window-local buffer lists.
3494 Windows now have local buffer lists. This means that removing a buffer
3495 from display in a window will preferably show the buffer previously
3496 shown in that window with its previous window-start and window-point
3497 positions. This also means that the same buffer may be automatically
3498 shown twice even if it already appears in another window.
3500 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3501 which if non-nil requires the buffer to be displayed in the currently
3502 selected window, signaling an error otherwise. If nil, another window
3503 can be used, e.g. if the selected one is strongly dedicated.
3505 *** `split-window-vertically' and `split-window-horizontally' renamed
3506 to `split-window-below' and `split-window-right' respectively.
3507 The old names are kept as aliases.
3511 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3512 named ACTION, and takes a display action of the same form as
3513 `display-buffer-base-action' (see Changes, above). A non-nil,
3514 non-list value is treated specially, as the old meaning.
3516 **** New variable `display-buffer-overriding-action'.
3518 **** The procedure of `display-buffer' etc. to choose a window is
3519 determined by combining `display-buffer-overriding-action',
3520 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3521 and `display-buffer-fallback-action'. The second and fourth of these
3522 are user-customizable variables.
3524 See the docstring of `display-buffer' for details.
3526 *** New functions `window-state-get' and `window-state-put'.
3527 These functions allow to save and restore the state of an arbitrary
3528 frame or window as an Elisp object.
3532 *** New variable `completion-extra-properties' used to specify extra
3533 properties of the current completion:
3534 - :annotate-function, same as the old completion-annotate-function.
3535 - :exit-function, function to call after completion took place.
3537 *** Functions on `completion-at-point-functions' can return any of the
3538 properties valid for `completion-extra-properties'.
3540 *** `completion-annotate-function' is obsolete.
3542 *** New `metadata' method for completion tables. The metadata thus returned
3543 can specify various details of the data returned by `all-completions':
3544 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3545 used to select a style in completion-category-overrides.
3546 - `annotation-function' to add annotations in *Completions*.
3547 - `display-sort-function' to specify how to sort entries in *Completions*.
3548 - `cycle-sort-function' to specify how to sort entries when cycling.
3550 *** `minibuffer-local-filename-must-match-map' is not used any more.
3551 Instead, the bindings in `minibuffer-local-filename-completion-map'
3552 are combined with `minibuffer-local-must-match-map'.
3554 *** New variable `completing-read-function' allows overriding the
3555 behavior of `completing-read'.
3557 ** `glyphless-char-display' can now distinguish between graphical and
3558 text terminal display, via a char-table entry that is a cons cell.
3560 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3561 Instead, the offending function is removed.
3565 *** New function `run-hook-wrapped' for running an abnormal hook by
3566 passing the hook functions as arguments to a "wrapping" function.
3567 Like `run-hook-with-args-until-success', it stops at the first
3568 non-nil return value.
3570 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3571 set of "wrapping" filters, similar to around advice.
3572 (A version of this macro was actually added in Emacs 23.2 but was not
3573 advertised at the time.)
3577 *** New macro `condition-case-unless-debug' (this was actually added in
3578 Emacs 23.1 as condition-case-no-debug, but not advertised)
3580 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3582 *** Variable `stack-trace-on-error' removed.
3584 *** The debugger can now "continue" from an error, which means it will
3585 jump to the error handler as if the debugger had not been invoked
3586 instead of jumping all the way to the top-level.
3588 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3589 This can be useful when `inhibit-quit' is set.
3591 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3592 named Emacs server instances.
3594 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3595 to redirect STDOUT to a file.
3597 ** The function `format-time-string' now supports the %N directive,
3598 for higher-resolution time stamps.
3600 ** New input reading functions
3602 *** New function `read-char-choice' reads a restricted set of
3603 characters, discarding any inputs not inside the set.
3605 *** The command `read-color' now requires a match for a color name
3606 or RGB triplet, instead of signaling an error if the user provides
3609 **** `facemenu-read-color' is now an alias for `read-color'.
3611 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3612 The variable is now used to load all kind of supported dynamic libraries,
3613 not just image libraries. The previous name is still available as an
3616 ** Syntax parsing changes
3618 *** New variable `syntax-propertize-function'.
3619 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3620 This allows syntax-table properties to be set independently from font-lock:
3621 just call syntax-propertize to make sure the text is propertized.
3622 Together with this new variable come a new hook
3623 syntax-propertize-extend-region-functions, as well as two helper functions:
3624 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3625 as-is; and syntax-propertize-rules which provides a new way to specify
3628 *** Syntax tables support a new "comment style c" additionally to style b.
3630 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3632 ** frame-local variables cannot be let-bound any more.
3634 ** Major and minor mode changes
3636 *** `set-auto-mode' now respects mode: local variables at the end of files,
3637 as well as those in the -*- line.
3639 *** `prog-mode' is a new major mode from which programming modes
3642 **** `prog-mode-hook' can be used to enable features for programming
3643 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3644 on-the-fly spell checking for comments and strings.
3646 *** New hook `change-major-mode-after-body-hook', run by
3647 `run-mode-hooks' just before any other mode hooks.
3649 *** Enabled globalized minor modes can be disabled in specific major modes.
3650 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3651 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3653 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3655 ** File-handling changes
3657 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3658 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3659 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3660 argument is supplied (see Trash changes, above).
3662 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3664 ** Tool-bars can display separators.
3665 Tool-bar separators are handled like menu separators in menu-bar maps,
3666 i.e. via menu entries of the form `(menu-item "--")'.
3670 *** Animated images support (currently animated gifs only).
3672 **** `image-animated-p' returns non-nil if an image can be animated.
3674 **** `image-animate' animates a supplied image spec.
3676 **** `image-animate-timer' returns the timer object for an image that
3679 *** `image-extension-data' has been renamed to `image-metadata'.
3680 The old name is an obsolete alias to the new one.
3682 *** Image mode can view any image type that ImageMagick supports.
3683 This requires Emacs to be built with ImageMagick support.
3685 **** New function `imagemagick-types', defined if ImageMagick support
3686 is enabled, returns a list of image file extensions that your
3687 ImageMagick installation supports.
3689 **** New function `imagemagick-register-types' enables ImageMagick
3690 image types in Image mode and in `create-image' and other helper
3693 **** New option `imagemagick-types-inhibit' excludes certain
3694 ImageMagick image types from `imagemagick-register-types'.
3696 **** With ImageMagick support, there are extra Image mode commands to
3697 resize and rotate images: `image-transform-fit-to-height',
3698 `image-transform-fit-to-width', `image-transform-set-rotation', and
3699 `image-transform-set-scale'.
3701 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3702 passes it to the mail user agent function. This argument specifies an
3703 action for returning to the caller after finishing with the mail. For
3704 example, this is used by Rmail to optionally delete a mail window.
3706 ** XML and HTML parsing
3707 If Emacs is compiled with libxml2 support, there are two new
3708 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3709 and `libxml-parse-xml-region' (which parses XML). Both return an
3710 Emacs Lisp parse tree.
3712 ** Networking and encryption changes
3714 *** `open-network-stream' can now be used to open an encrypted stream.
3715 It now accepts an optional `:type' parameter for initiating a TLS
3716 connection, directly or via STARTTLS. To do STARTTLS, additional
3717 parameters (`:end-of-command', `:success', `:capabilities-command')
3718 must also be supplied.
3720 *** New library gnutls.el.
3721 The new function `gnutls-available-p' returns non-nil if Emacs is
3722 built with GnuTLS support. The main entry points are
3723 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3724 these functions through `open-network-stream', because that can
3725 upgrade connections through STARTTLS opportunistically or use plain
3726 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3729 *** New primitive `secure-hash' that supports many secure hash algorithms:
3730 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3731 sha1.el has been removed. The `sha1' feature is provided by default.
3735 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3737 ** Progress reporters can now "spin".
3738 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3739 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3740 time you call `progress-reporter-update' on that progress reporter,
3741 with a nil or omitted VALUE argument, the reporter message is
3742 displayed with a "spinning bar".
3744 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3745 being reverted, even if the buffer has a local `revert-buffer-function'.
3747 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3748 If delayed-warnings-list is non-nil, the command loop calls
3749 `delayed-warnings-hook' after `post-command-hook'. At present, this
3750 is only used by Emacs on some platforms to display warnings during
3751 startup, which might otherwise not be noticed. This uses the
3752 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3754 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3756 ** New function `make-composed-keymap' that constructs a new keymap
3757 from multiple input maps. You can use this to make a keymap that
3758 inherits from multiple maps, eg:
3759 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3761 ** New function `string-prefix-p'.
3762 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3764 ** New reader macro ## that stands for the empty symbol.
3765 This means that the empty symbol can now be read back. Also, #: by itself
3766 (when not immediately followed by a possible symbol character) stands for
3767 an empty uninterned symbol.
3769 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3771 ** The following functions and variables are obsolete:
3773 *** `tooltip-use-echo-area' is obsolete.
3774 Rather than setting this to t, disable Tooltip mode instead.
3776 *** buffer-substring-filters is obsolete.
3777 Use `filter-buffer-substring-functions' instead.
3779 *** `byte-compile-disable-print-circle' is obsolete.
3781 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3782 Use `post-command-hook' instead.
3784 *** `font-lock-maximum-size' is obsolete.
3787 * Changes in Emacs 24.1 on Non-Free Operating Systems
3789 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3790 and also when HOME is set to C:\ by default.
3792 ** New configure.bat options
3794 *** --enable-checking builds Emacs with extra runtime checks.
3796 *** --distfiles specifies files to be included in binary distribution.
3798 *** --without-gnutls disables automatic GnuTLS detection.
3800 *** --lib for general library linkage, works with the USER_LIBS build variable.
3802 ** New make target `dist' to create binary distribution for MS Windows.
3804 ** The Lisp function `w32-default-color-map' is now obsolete.
3805 (It is only used internally in the Emacs C code.)
3807 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3808 reappear on mouse-over. (Requires OS X 10.6 or later.)
3810 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3811 other platforms, rather than inserting its contents into the buffer.
3814 ----------------------------------------------------------------------
3815 This file is part of GNU Emacs.
3817 GNU Emacs is free software: you can redistribute it and/or modify
3818 it under the terms of the GNU General Public License as published by
3819 the Free Software Foundation, either version 3 of the License, or
3820 (at your option) any later version.
3822 GNU Emacs is distributed in the hope that it will be useful,
3823 but WITHOUT ANY WARRANTY; without even the implied warranty of
3824 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3825 GNU General Public License for more details.
3827 You should have received a copy of the GNU General Public License
3828 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3833 paragraph-separate: "[
\f]*$"