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 just 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-limit' 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.
315 ** New command `delete-duplicate-lines'.
316 When its arg ADJACENT is non-nil (when called interactively with C-u
317 C-u) it works like the utility `uniq'. Otherwise by default it
318 deletes duplicate lines everywhere in the region without regard to
319 adjacency. When its arg KEEP-BLANKS is non-nil (when called
320 interactively with C-u C-u C-u), duplicate blank lines are preserved.
323 * Changes in Specialized Modes and Packages in Emacs 24.4
325 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
327 ~/.emacs.d/timelog replaces ~/.timelog
328 ~/.emacs.d/vip replaces ~/.vip
329 ~/.emacs.d/viper replaces ~/.viper
330 ~/.emacs.d/ido.last replaces ~/.ido.last
331 ~/.emacs.d/kkcrc replaces ~/.kkcrc
332 ~/.emacs.d/quickurls replaces ~/.quickurls
333 ~/.emacs.d/idlwave replaces ~/.idlwave
334 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
335 ~/.emacs.d/places replaces ~/.emacs-places
336 ~/.emacs.d/shadows replaces ~/.shadows
337 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
338 ~/.emacs.d/strokes replaces ~/.strokes
339 ~/.emacs.d/notes replaces ~/.notes
340 ~/.emacs.d/type-break replaces ~/.type-break
341 Also the following files used by the now obsolete otodo-mode.el:
342 ~/.emacs.d/todo-do replaces ~/.todo-do
343 ~/.emacs.d/todo-done replaces ~/.todo-done
344 ~/.emacs.d/todo-top replaces ~/.todo-top
346 ** Backtrace and debugger
348 *** The Lisp debugger's `e' command now includes the lexical environment
349 when evaluating the code in the context at point. Hence, it now lets
350 you access lexical variables.
353 *** New command `v' (`debugger-toggle-locals') displays local vars.
355 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
356 code run via JIT Lock.
361 *** Battery information via the BSD `apm' utility is now supported.
365 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
367 ** Calendar and Diary
370 *** New faces `calendar-weekday-header', `calendar-weekend-header',
371 and `calendar-month-header'.
374 *** New option `calendar-day-header-array'.
377 *** New variable `diary-from-outlook-function', used by the command
378 `diary-from-outlook'.
381 *** The variable `calendar-font-lock-keywords' is obsolete.
385 *** Calc by default now uses the Gregorian calendar for all dates, and
386 uses January 1, 1 AD as its day number 1. Previously Calc used the
387 Julian calendar for dates before September 14, 1752, and it used
388 December 31, 1 BC as its day number 1; the new scheme is more
389 consistent with Calendar's calendrical system and day numbering.
391 *** The new variable `calc-gregorian-switch' lets you configure the
392 date when Calc switches from the Julian to the Gregorian calendar.
393 Nil, the default value, means to always use the Gregorian calendar.
394 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
397 *** Support for ISO 8601 dates.
403 **** The cpp-root project now supports executing a compile command.
404 It can be set through the new :compile-command slot or the
405 buffer-local variable `compile-command'.
407 **** Better selection of include directories for the 'linux' project.
408 Include directories now support out-of-tree build directories and
409 target architecture auto-detection.
413 **** Improved detection of used namespaces in current scope in C++.
415 **** Parsing of default values for variables and function arguments in C/C++.
416 They are also displayed by the summarize feature in the modeline.
418 **** Improved parsing of function pointers in C/C++.
419 This also includes parsing of function pointers as function arguments.
421 **** Parsing of C/C++ preprocessor macros which open new scope.
422 For example, this enables parsing of macros which open new namespaces.
424 **** Support for 'this' pointer in inline member functions in C++.
428 *** New macro `cl-tagbody'.
431 *** letf is now just an alias for cl-letf.
435 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
436 Hence, you can now enable it independently from `transient-mark-mode',
437 `delete-selection-mode', and `shift-select-mode'.
439 *** `cua-highlight-region-shift-only' is now obsolete.
440 You can disable `transient-mark-mode' to get the same result.
442 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
446 *** Support for completion, ElDoc, and Flycheck has been added.
448 *** The current CFEngine syntax is parsed from "cf-promises -s json".
449 There is a fallback syntax available if you don't have cf-promises or
450 if it doesn't support that option.
452 ** Delete Selection mode can now be used without `transient-mark-mode'.
456 *** `desktop-auto-save-timeout' defines the number of seconds idle time
457 before auto-save of the desktop.
459 *** `desktop-restore-frames', enabled by default, allows saving and
460 restoring the frame/window configuration (frameset). Additional options
461 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
462 and `desktop-restore-forces-onscreen' offer further customization.
467 *** New minor mode `dired-hide-details-mode' hides details.
469 ** Eldoc Mode works properly in the minibuffer.
471 ** Electric Pair mode
473 *** New option `electric-pair-preserve-balance', enabled by default.
474 If non-nil, pairing/skipping only kicks in when that help the balance
475 of parentheses and quotes, i.e. the buffer should end up at least as
478 You can further control this behavior by adjusting the predicates
479 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
481 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
482 In `electric-pair-mode', the commands `backward-delete-char' and
483 `backward-delete-char-untabify' are now bound to electric variants
484 that delete the closer when invoked between adjacent pairs.
486 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
487 In `electric-pair-mode', inserting a newline between adjacent pairs
488 opens an extra newline after point, which is indented if
489 `electric-indent-mode' is also set.
491 *** New option `electric-pair-skip-whitespace', enabled by default.
492 This controls if skipping over closing delimiters should jump over any
493 whitespace slack. Setting it to `chomp' makes it delete this
494 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
496 *** New variables control the pairing in strings and comments.
497 You can customize `electric-pair-text-pairs' and
498 `electric-pair-text-syntax-table' to tweak pairing behavior inside
499 strings and comments.
503 *** New option `epa-mail-aliases'.
504 You can set this to a list of alias expansions for keys to use
505 in `epa-mail-encrypt'.
507 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
508 that means: when one of the recipients of the message being encrypted
509 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
511 If one element of the variable's value is ("foo@bar.com"),
512 that means: when one of the recipients of the message being encrypted
513 is `foo@bar.com', ignore that name as regards encryption.
514 This is useful to avoid a query when you have no key for that name.
518 *** New option `erc-accidental-paste-threshold-seconds'.
519 If set to a number, this can be used to avoid accidentally pasting large
520 amounts of data into the ERC input.
523 ** New ERT macro `skip-unless' allows skipping ERT tests.
524 See the ERT manual for details.
529 *** `eshell' now supports visual subcommands and options.
530 Eshell has been able to handle "visual" commands (interactive,
531 non-line oriented commands such as top that require display
532 capabilities not provided by eshell) by running them in an Emacs
533 terminal emulator. See `eshell-visual-commands'.
535 This feature has been extended to subcommands and options that make a
536 usually line-oriented command a visual command. Typical examples are
537 "git log" and "git <command> --help", which display their output in a
538 pager by default. See `eshell-visual-subcommands' and
539 `eshell-visual-options'.
542 *** New Eshell-Tramp module.
543 External su and sudo commands are now the default; the internal,
544 Tramp-using variants can still be used by enabling the eshell-tramp
549 *** New option `f90-smart-end-names'.
551 ** Icomplete is a bit more like Ido.
553 *** Key bindings to navigate through and select the completions.
555 *** The icomplete-separator is customizable, and its default has changed.
557 *** Removed `icomplete-show-key-bindings'.
559 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
560 (setq icomplete-with-completion-tables '(internal-complete-buffer))
561 will revert to the old behavior.
565 *** Ido has a manual now.
567 *** `ido-use-virtual-buffers' takes a new value 'auto.
569 *** `ido-decorations' has been slightly extended to give a bit more control.
574 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
575 visit the next image file and the previous image file in the same
576 directory, respectively.
579 *** New commands to show specific frames of multi-frame images.
580 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
581 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
584 *** New commands to speed up, slow down, or reverse animation.
585 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
586 speed up and slow down the animation. `a r' (`image-reverse-speed')
587 to reverse it and `a 0' (`image-reset-speed') to reset it.
590 *** The command `image-mode-fit-frame' deletes other windows.
591 When toggling, it restores the frame's previous window configuration.
592 It also has an optional frame argument, which can be used by Lisp
593 callers to fit the image to a frame other than the selected frame.
597 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
598 will cycle through faces in `hi-lock-face-defaults' without prompting.
601 *** New global command `M-s h .' (`highlight-symbol-at-point')
602 highlights the symbol found near point without prompting,
603 using the next face automatically.
605 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
608 ** New Info face `info-index-match', used to highlight matches in index
609 entries displayed by `Info-index-next', `Info-virtual-index' and
614 *** Better indentation of multiple-variable declarations.
615 If declaration spans several lines, variables on the following lines
616 are lined up to the first one.
618 *** We now recognize and better indent continuations in array
621 *** New option `js-switch-indent-offset`.
623 ** MH-E has been updated to MH-E version 8.5.
624 See MH-E-NEWS for details.
629 *** Font locking for texinfo comments and new keywords.
631 *** Completion in Octave file buffers.
635 *** Jump to definition.
637 *** Documentation lookup/search.
639 ** OPascal mode is the new name for Delphi mode.
641 *** All delphi-* variables and functions have been renamed to opascal-*.
643 *** `delphi-newline-always-indents' is not supported any more.
644 Use `electric-indent-mode' instead.
646 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
650 *** The format of `archive-contents' files, generated by package
651 repositories, has changed to allow a new (fifth) element in the data
652 vectors, containing an associative list with extra properties.
654 *** `describe-package' buffer uses the `:url' extra property to
655 display a `Homepage' header, if it's present.
657 *** In the buffer produced by `describe-package', there are now buttons
658 listing the keywords related to that package. You can click on them
659 to see other packages related to any given keyword.
661 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
662 the packages by a keyword.
665 ** In Prolog mode, `prolog-use-smie' has been removed,
666 along with the non-SMIE indentation code.
670 *** The new command `remember-notes' creates a buffer that is saved on
671 `kill-emacs'. You can think of it as a *scratch* buffer whose content
672 is preserved. In fact, it was designed as a replacement for *scratch*
673 buffer and can be used that way by setting `initial-buffer-choice' to
674 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
675 Without the second change, the *scratch* buffer will still be there
676 for notes that do not need to be preserved.
678 *** The Remember package can now store notes in separates files.
679 You can use the new function `remember-store-in-files' within the
680 `remember-handler-functions' option. See `remember-data-directory'
681 and `remember-directory-file-name-format' for new options related to
686 *** Customize `rmail-mbox-format' to influence some minor aspects of
687 how Rmail displays non-MIME messages.
690 *** The `unrmail' command now converts from BABYL to mboxrd format,
691 rather than mboxo. Customize `unrmail-mbox-format' to change this.
695 *** New option `ruby-encoding-magic-comment-style'.
697 *** New option `ruby-custom-encoding-magic-comment-template'.
699 *** Improved syntax highlighting and indentation.
701 *** More Ruby file types have been added to `auto-mode-alist'.
703 *** New option `ruby-align-to-stmt-keywords'.
705 *** New `electric-indent-mode' integration.
707 ** Search and Replace
710 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
711 starts a symbol (identifier) incremental search forward with the
712 symbol found near point added to the search string initially.
715 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
716 and adds it to the search string.
718 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
719 between nil and the value of the option `search-invisible' (or `open'
722 *** `query-replace' skips invisible text when `search-invisible' is nil,
723 and opens overlays with hidden text when `search-invisible' is `open'.
726 *** A negative prefix arg of replacement commands replaces backward.
727 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
728 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
731 *** By default, prefix arguments do not now terminate Isearch mode.
732 Set `isearch-allow-prefix' to nil to restore old behavior.
735 *** More Isearch commands accept prefix arguments, namely
736 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
740 *** Word search now matches whitespace at the beginning/end
741 of the search string if it contains leading/trailing whitespace.
742 In an incremental word search or when using a non-nil LAX argument
743 of `word-search-regexp', the lax matching can also match part of
744 the first word (in addition to the lax matching of the last word).
745 The same rules are now applied to the symbol search with the difference
746 that it matches symbols, and non-symbol characters between symbols.
749 ** New SES command `ses-rename-cell' allows assigning names to SES cells.
752 ** The shell.el option `explicit-bash-args' includes --noediting by default.
753 All non-ancient Bash versions support this option.
757 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
759 *** The SMIE indentation engine is now used by default.
761 ** SMIE indentation can be customized via `smie-config'.
762 Emacs can learn the appropriate indentation settings if you provide it
763 with an indented sample file.
765 ** New Term mode option `term-suppress-hard-newline'.
767 ** Todo mode has been rewritten and enhanced.
768 New features include:
769 *** Support for multiple todo files and archive files of done items
770 *** Renaming, reordering, moving, merging, and deleting categories
771 *** Sortable tabular summaries of categories and the types of items they contain
772 *** Cross-category lists of items filtered by specific criteria
773 *** More fine-grained interaction with the Emacs diary, by being able to decide
774 for each todo item whether it appears in the Fancy Diary display
775 *** Highly flexible new item insertion and item editing
776 *** Moving items between categories, storing done items in their category or in
777 archive files, undoing or unarchiving done items
778 *** Reprioritizing items by inputting a numerical priority
779 *** Extensive customizability of operation and display, including numerous faces
781 The Todo mode user manual describes all commands and most user
782 options. To support some of these features, a new file format is
783 used, which is incompatible with the old format; however, you can
784 convert old todo and done item files to the new format on initializing
785 the first new todo file, or at any later time with the provided
786 conversion command. The previous version of todo-mode.el has been
787 renamed to otodo-mode.el and is now obsolete.
791 *** No prompting for the destination buffer, unless a prefix argument is used.
793 *** With a prefix argument, you can enter a "context"; i.e., a Lisp
794 expression whose value at the time the function is entered/exited will
795 be printed along with the function name and arguments. For example,
796 you can use this to trace the value of current-buffer or point.
800 *** The experimental url syntax for remote file names has been removed.
803 *** New connection method "adb", which allows to access Android
804 devices by the Android Debug Bridge. The variable `tramp-adb-program'
805 can be used to adapt the path of the "adb" program, if needed.
807 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
808 "scpc" and "rsyncc" are discontinued. The ssh option
809 "ControlMaster=auto" is set automatically in all ssh-based methods,
813 *** Handlers for `file-acl' and `set-file-acl' for remote machines
814 which support POSIX ACLs.
817 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
818 for remote machines which support filesystem notifications.
820 ** New command `url-cookie-list' displays all the current cookies, and
821 allows deleting selected cookies.
823 ** VC and related modes
826 *** In VC directory mode, `D' displays diffs between VC-controlled
827 whole tree revisions.
830 *** In VC directory mode, `L' lists the change log for the current VC
831 controlled tree in a window.
834 *** In VC directory mode, `I' shows a log of changes that will be
835 received with a pull operation.
838 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
839 under current version control system. When called with a prefix
840 argument, you can remove a file from the ignored file list.
843 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
844 because it is moved to vc-cvs.el.
849 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
852 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
855 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
856 are obsolete. Customize the `woman-*' faces instead.
858 ** Obsolete packages:
860 *** Iswitchb is made obsolete by icomplete-mode.
862 *** longlines.el is obsolete; use visual-line-mode instead.
867 *** terminal.el is obsolete; use term.el instead.
869 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
872 *** xesam.el is obsolete, because the XESAM project has been canceled.
875 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
878 *** The Info-edit command is obsolete. Editing Info nodes by hand
879 has not been relevant for some time.
882 * New Modes and Packages in Emacs 24.4
885 ** New package `eww' is a built-in web browser.
886 It is only available if Emacs is compiled with libxml2 support.
888 ** New minor mode `superword-mode'.
889 This overrides the default word motion commands to treat "symbol_words"
890 as a single word, similar to what `subword-mode' does.
893 ** New package nadvice.el offers lighter-weight advice facilities.
896 *** add-function/remove-function, which can be used to add/remove code on any
897 function-carrying place, such as process-filters or `<foo>-function' hooks.
899 *** advice-add/advice-remove to add/remove a piece of advice on a named
900 function,much like `defadvice' does.
902 ** New package frameset.el.
903 It provides a set of operations to save a frameset (the state of all
904 or a subset of the existing frames and windows, somewhat similar to a
905 frame configuration), both in-session and persistently, and restore it
906 at some point in the future.
909 ** New package filenotify.el provides an interface for file system
910 notifications. It requires that Emacs be compiled with one of the
911 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
914 * Incompatible Lisp Changes in Emacs 24.4
917 ** `kill-region' has lost its `yank-handler' optional argument.
920 ** `(input-pending-p)' no longer runs other timers that are ready to run.
921 The new optional CHECK-TIMERS parameter allows for the prior behavior.
924 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
927 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
928 Some languages match those as »...«, and others as «...», so it is
929 better for Emacs to stay neutral by default.
932 ** In compiled Lisp files, the header no longer includes a timestamp.
935 ** The default file coding for Emacs Lisp files is now utf-8.
936 (See `file-coding-system-alist'.) In most cases, this change is
937 transparent, but files that contain unusual characters without
938 specifying an explicit coding system may fail to load with obscure
939 errors. You should either convert them to utf-8 or add an explicit
943 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
944 It used to disable the minor mode, major mode, and text-property keymaps,
945 whereas now it simply has higher precedence.
947 ** Default process filters and sentinels are not nil any more.
948 Instead they default to a function that does what the nil value used to do.
951 ** `read-event' does not return decoded chars in ttys any more.
952 As was the case in Emacs 22 and before, the decoding of terminal
953 input, according to `keyboard-coding-system', is not performed in
954 `read-event' any more. But unlike in Emacs 22, this decoding is still
955 done before input-decode-map, function-key-map, etc.
958 ** The option `inhibit-local-menu-bar-menus' has been removed.
961 ** Frame-local variables that affect redisplay do not work any more.
962 More specifically, redisplay does not bother to check for a frame-local
963 value when looking up variables.
966 ** nil and "unbound" are indistinguishable in `symbol-function'.
967 `symbol-function' does not signal a `void-function' error any more.
968 To determine if a symbol's function definition is void, use `fboundp'.
971 ** `defadvice' does not honor the `freeze' flag and cannot advise
972 special-forms any more.
975 ** `dolist' no longer binds VAR while evaluating the RESULT form,
976 when lexical binding is enabled. Previously, VAR was bound to nil,
977 which often led to spurious unused-variable warnings.
980 ** The return value of `backup-buffer' has changed.
981 The second argument is no longer an SELinux context, instead it is an
982 alist of extended attributes as returned by the new function
983 `file-extended-attributes'. The attributes can be applied to another
984 file using `set-file-extended-attributes'.
987 ** By default `copy-file' no longer copies file permission bits to an
988 existing destination; and it sets the file permission bits of a newly
989 created destination to those of the source, masked by the default file
990 permissions. To copy the file permission bits, pass t as the
991 PRESERVE-PERMISSIONS argument of `copy-file'.
994 ** `visited-file-modtime' now returns -1 for nonexistent files.
995 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
996 in the presence of files with negative time stamps.
999 ** The cars of the elements in `interpreter-mode-alist' are now
1000 treated as regexps rather than literal strings.
1003 * Lisp Changes in Emacs 24.4
1006 ** The second argument of `eval' can now specify a lexical environment.
1009 ** New functions `special-form-p' and `macrop'.
1011 ** New macro `define-alternatives' can be used to define generic commands.
1012 Generic commands are interactive functions whose implementation can be
1013 selected among several alternatives, as a matter of user preference.
1015 ** The `defalias-fset-function' property lets you catch `defalias'
1016 calls, and redirect them to your own function, instead of `fset'.
1019 ** New variable `enable-dir-local-variables'.
1020 Directory-local variables are ignored if this is nil. This may be
1021 useful for modes that want to ignore directory-locals while still
1022 respecting file-local variables.
1025 ** New function `get-pos-property'.
1027 ** Completion changes
1029 *** The separator for `completing-read-multiple' can now be a regexp.
1030 The default separator has been changed to allow surrounding spaces
1033 *** The `common-substring' arg of `display-completion-list' is obsolete.
1034 Either use `completion-all-completions', which returns highlighted
1035 strings (including for partial or substring completion), or call
1036 `completion-hilit-commonality' to add the highlight.
1038 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1039 let you enable symbol prettification (replacing a string like "lambda" with
1040 the Greek lambda character).
1045 *** Functions to pop up menus and dialogs now work on all terminals,
1046 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1047 `message-box', `yes-or-no-p', etc.
1049 The function `display-popup-menus-p' will now return non-nil for a
1050 display or frame whenever a mouse is supported on that display or
1053 *** New hook `tty-setup-hook'.
1057 *** New display action function `display-buffer-no-window' to not
1058 display the buffer in a window.
1060 *** New display action alist entry `allow-no-window' to indicate the
1061 caller of `display-buffer' is ready to handle the case of not
1062 displaying the buffer in a window.
1064 ** New hook `pre-redisplay-function'.
1067 ** New bool-vector set operation functions:
1068 *** `bool-vector-exclusive-or'
1069 *** `bool-vector-union'
1070 *** `bool-vector-intersection'
1071 *** `bool-vector-set-difference'
1072 *** `bool-vector-not'
1073 *** `bool-vector-subsetp'
1074 *** `bool-vector-count-consecutive'
1075 *** `bool-vector-count-population'
1078 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1080 ** Error-handling changes
1083 *** New function `define-error'.
1086 *** `with-demoted-errors' takes an additional argument `format'.
1089 ** New macro `with-eval-after-load'.
1090 This is like the old `eval-after-load', but better behaved.
1093 ** New library subr-x.el with miscellaneous small utility functions
1094 *** `hash-table-keys'
1095 *** `hash-table-values'
1096 *** `string-blank-p`
1097 *** `string-empty-p`
1099 *** `string-reverse`
1100 *** `string-trim-left'
1101 *** `string-trim-right'
1103 *** `string-remove-prefix'
1104 *** `string-remove-suffix'
1107 ** Obsoleted functions:
1110 *** `lisp-complete-symbol'
1111 *** `field-complete'
1112 *** `minibuffer-completion-contents'
1113 *** `isearch-nonincremental-exit-minibuffer'
1114 *** `isearch-filter-visible'
1115 *** `generic-make-keywords-list'
1116 *** `get-upcase-table' (use `case-table-get-table' instead).
1118 ** `with-wrapper-hook' is obsoleted by `add-function'.
1119 The few hooks that used with-wrapper-hook are replaced as follows:
1120 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1121 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1122 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1125 ** `byte-compile-interactive-only-functions' is now obsolete.
1126 To specify that a command should only be called interactively, give it
1127 a non-nil `interactive-only' property.
1130 ** `split-string' now takes an optional argument TRIM.
1131 The value, if non-nil, is a regexp that specifies what to trim from
1132 the start and end of each substring.
1135 ** New function `string-suffix-p'.
1137 ** File-handling changes
1140 *** Support for filesystem notifications.
1141 Emacs now supports notifications of filesystem changes, such as
1142 creation, modification, and deletion of files. This requires the
1143 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1144 MS-Windows systems, this is supported for Windows XP and newer
1148 *** The 9th element returned by `file-attributes' is now unspecified.
1149 Formerly, it was t if the file's gid would change if file were deleted
1150 and recreated. This value has been inaccurate for years on many
1151 platforms, and nobody seems to have noticed or cared.
1154 *** The 6th argument to `copy-file' has been renamed to
1155 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1156 Unix file permission bits as well as SELinux context.
1159 *** The function `file-ownership-preserved-p' now has an optional
1160 argument GROUP which causes it check for file group too. This can be
1161 used in place of the 9th element of `file-attributes'.
1164 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1165 argument, with the same interpretation as the returned value of
1166 `visited-file-modtime'.
1168 ** Autorevert changes
1171 *** If Emacs is compiled with file notification support, notifications
1172 are used instead of checking the time stamp of the files. You can
1173 disable this by setting the user option `auto-revert-use-notify' to
1174 nil. Alternatively, a regular expression of directories to be
1175 excluded from file notifications can be specified by
1176 `auto-revert-notify-exclude-dir-regexp'.
1179 *** The new user option `auto-revert-remote-files' enables reversion
1180 of remote files when set to non-nil.
1184 *** The function `face-spec-set' is now like `setq' for face specs.
1185 Its third arg now accepts values specifying a face spec type (defface,
1186 custom, or override spec), and the relevant spec is set accordingly.
1189 *** New function `add-face-text-property', which can be used to
1190 conveniently prepend/append new face properties.
1192 *** Face specs set via Custom themes now replace the `defface' spec
1193 rather than inheriting from it (as do face specs set via Customize).
1195 *** New face characteristic (supports :underline (:style wave))
1196 specifies whether or not the terminal can display a wavy line.
1199 *** New face spec attribute :distant-foreground
1200 specifies foreground to use if background color is near the foreground
1201 color that would otherwise have been used.
1206 *** `image-animated-p' is now `image-multi-frame-p'.
1207 It returns non-nil for any image that contains multiple frames,
1208 whether or not it specifies a frame delay.
1211 *** New variable `image-default-frame-delay' gives the frame delay for
1212 animated images which do not specify a frame delay.
1215 *** New functions `image-current-frame' and `image-show-frame' for getting
1216 and setting the current frame of a multi-frame image.
1221 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1222 **** object-name -> eieio-object-name
1223 **** object-class -> eieio-object-class
1224 **** object-class-fast -> eieio--object-class
1225 **** object-class-name -> eieio-object-class-name
1226 **** object-name-string -> eieio-object-name-string
1227 **** object-num-slots -> eieio--object-num-slots
1228 **** object-set-name-string -> eieio-object-set-name-string
1229 **** class-of -> eieio-object-class
1230 **** class-name -> eieio-class-name
1231 **** class-parent -> eieio-class-parent
1232 **** class-parents -> eieio-class-parents
1233 **** class-parents-fast -> eieio-class-parents-fast
1234 **** class-children -> eieio-class-children
1235 **** class-num-slots -> eieio--class-num-slots
1236 **** class-precedence-list -> eieio-class-precedence-list
1237 **** class-direct-subclasses -> eieio-class-children
1238 **** class-direct-superclasses -> eieio-class-parents
1240 ** Changes in encoding and decoding of text
1243 *** New coding-system `prefer-utf-8'.
1244 This is like `undecided' but prefers UTF-8 on decoding if the text to
1245 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1246 any non-ASCII characters are automatically encoded as UTF-8.
1249 *** New attributes of coding-systems whose type is `undecided'.
1250 Two new attributes, `:inhibit-null-byte-detection' and
1251 `:inhibit-iso-escape-detection', determine how to detect encoding of
1252 text that includes null bytes and ISO-2022 escape sequences,
1253 respectively. Each of these attributes can be either nil, zero, or
1254 t. If it is t, decoding text ignores null bytes and, respectively,
1255 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1256 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1257 text is encoded in one of the ISO-2022 encodings, such as
1258 iso-2022-7bit. If the value is zero, Emacs consults the variables
1259 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1261 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1262 UTF-8 encoding and decoding, whenever possible.
1264 These attributes are only meaningful for coding-systems of type
1265 `undecided'. (The type of a coding-system is determined by its
1266 `:coding-type' attribute and can be accessed by calling the
1267 `coding-system-type' function.)
1270 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1273 ** New functions `group-gid' and `group-real-gid'.
1276 ** The spelling of the rx.el category `chinese-two-byte' has been
1277 corrected (the first 'e' was missing).
1280 ** Minor internal changes to the details of lock files.
1281 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1282 If DIR/.#FILE already exists and is not an Emacs lock file,
1283 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1284 numbered lock files DIR/.#FILE.0...).
1285 On file systems that do not support symbolic links, the lock is now a
1286 regular file with contents being what would have been in the symlink.
1288 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1291 *** The package descriptor and name of global variables, constants,
1292 and functions should be separated by two hyphens if the symbol is not
1293 meant to be used by other packages.
1296 * Changes in Emacs 24.4 on Non-Free Operating Systems
1299 ** The procedure for building Emacs on MS-Windows has changed.
1300 It is now built by running the same configure script as on all other
1301 platforms. This requires the MSYS environment and MinGW development
1302 tools. See the updated instructions in nt/INSTALL for details.
1304 Using the Posix configure script and Makefile's also means a change in
1305 the directory structure of the Emacs installation on Windows. It is
1306 now the same as on GNU and Unix systems. In particular, the auxiliary
1307 programs, such as cmdproxy.exe and hexl.exe, are in
1308 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1309 version), version-independent site-lisp is in share/emacs/site-lisp,
1310 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1311 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1312 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1313 directories and will find the files in there automatically; there's no
1314 need to set any variables due to this change.)
1317 ** Emacs on Windows 2000 and later can now access files and directories
1318 whose names cannot be encoded in the current system codepage.
1320 The new variable `w32-unicode-filenames' controls this feature: if it
1321 is t, Emacs uses Unicode APIs to pass file names to system calls,
1322 which lifts the limitation of file names to the current locale.
1325 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1326 The backtrace is written to the 'emacs_backtrace.txt' file in the
1327 directory where Emacs was running.
1330 ** The variable `buffer-file-type' is no longer supported.
1331 Setting it has no effect, and %t in the mode-line format is ignored.
1332 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1333 modifying it has no effect.
1336 ** Lock files now work on MS-Windows.
1337 This helps to prevent losing your edits if the same file is being
1338 edited in another Emacs session or by another user. See the node
1339 "Interlocking" in the Emacs User Manual for the details. To disable
1340 file locking, customize `create-lockfiles' to nil.
1342 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1343 GNUstep and Mac OS X 10.4 use the old font backend.
1344 To use the old backend by default, do on the command line:
1345 % defaults write org.gnu.Emacs FontBackend ns
1347 ** Improved fullscreen support on Mac OS X.
1348 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1349 Customize `ns-use-native-fullscreen' to change the style.
1350 For Mac OS X 10.7 and newer, native is the default.
1352 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1353 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1354 does not apply to images.
1357 * Installation Changes in Emacs 24.3
1359 ** The default X toolkit is now Gtk+ version 3.
1360 If you don't pass `--with-x-toolkit' to configure, or if you use
1361 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1362 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1363 You can explicitly require a specific version by passing
1364 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1366 ** New configure option `--enable-link-time-optimization', to utilize
1367 an appropriate feature provided by GCC since version 4.5.0.
1369 ** New configure option `--without-all' to disable most of the optional
1370 features (image support, etc.) that are normally enabled by default.
1372 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1373 Emacs). If building with GCC, this enables compile-time checks that
1374 warn/give errors about possibly-questionable C code. On a recent GNU
1375 system there should be no warnings; on older and on non-GNU systems
1376 the results may be useful to developers.
1378 ** The configure option `--enable-use-lisp-union-type' has been
1379 renamed to `--enable-check-lisp-object-type', as the resulting
1380 Lisp_Object type no longer uses a union to implement the compile time
1381 check that this option enables.
1383 ** The configure option `--disable-maintainer-mode' has been removed,
1384 as it was confusingly-named and rarely useful.
1386 ** The configure options `--program-prefix', `--program-suffix', and
1387 `--program-transform-name' apply to more than just the installed
1388 binaries. Now they also affect the man pages, icons, and the
1389 etc/emacs.desktop file; but not the info pages, since this would break
1390 links between the various manuals.
1392 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1393 overwriting "emacs" in the installation bin/ directory with a link
1396 ** Emacs uses libtinfo in preference to libncurses, if available.
1398 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1399 /usr/pkg/lib to the linker search path. You must add them yourself if
1402 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1403 (from the bin and libexec directories, respectively). The former is
1404 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1407 * Startup Changes in Emacs 24.3
1409 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1410 lisp/ directory. There should not be any there anyway. If you have
1411 been adding them there, put them somewhere else; e.g., site-lisp.
1413 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1416 * Changes in Emacs 24.3
1420 *** `C-h f' (`describe-function') can now perform autoloading.
1421 When this command is called for an autoloaded function whose docstring
1422 contains a key substitution construct, that function's library is
1423 automatically loaded, so that the documentation can be shown
1424 correctly. To disable this, set `help-enable-auto-load' to nil.
1426 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1427 even after their associated libraries have been loaded (and the
1428 autoloads have been redefined as functions).
1432 *** Images displayed via ImageMagick now support transparency and the
1433 :background image specification property.
1435 *** When available, ImageMagick support is automatically enabled.
1436 It is no longer necessary to call `imagemagick-register-types'
1437 explicitly to install ImageMagick image types; that function is called
1438 automatically at startup, or when customizing an imagemagick- option.
1440 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1441 ImageMagick to view images. (You must call `imagemagick-register-types'
1442 afterwards if you do not use customize to change this.)
1444 *** The new variable `imagemagick-enabled-types' also affects which
1445 ImageMagick types are treated as images. The function
1446 `imagemagick-filter-types' returns the list of types that will be
1451 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1452 next and previous path separator, respectively.
1454 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1455 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1456 non-nil before enabling the mode.
1460 *** New option `mode-line-default-help-echo' specifies the help text
1461 (shown in a tooltip or in the echo area) for any part of the mode line
1462 that does not have its own specialized help text.
1464 *** You can now click mouse-3 in the coding system indicator to invoke
1465 `set-buffer-file-coding-system'.
1467 ** Server and client
1469 *** emacsclient now obeys string values for `initial-buffer-choice',
1470 if it is told to open a new frame without specifying any file to visit
1471 or expression to evaluate.
1473 *** New option `server-auth-key' specifies a shared server key.
1475 ** Emacs now generates backtraces on fatal errors.
1476 On encountering a fatal error, Emacs now outputs a textual description
1477 of the fatal signal, and a short backtrace on platforms like glibc
1478 that support backtraces.
1480 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1481 This minor mode replaces `toggle-read-only', which is now obsolete.
1483 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1484 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1485 respectively, without exiting from the prompt.
1487 ** In the Package Menu, newly-available packages are listed as "new",
1488 and sorted above the other "available" packages by default.
1490 ** If your Emacs was built from a repository checkout, the new variable
1491 `emacs-bzr-version' contains information about the bzr revision used.
1493 ** New option `create-lockfiles' specifies usage of lockfiles.
1494 It defaults to t. Changing it to nil inhibits the creation of lock
1495 files (use this with caution).
1497 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1498 variables on remote hosts.
1500 ** The entry for PCL-CVS has been removed from the Tools menu.
1501 The PCL-CVS commands are still available via the keyboard.
1503 ** Using "unibyte: t" in Lisp source files is obsolete.
1504 Use "coding: raw-text" instead.
1506 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1507 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1508 The previous binding, introduced in Emacs 24.1, was a mistake, because
1509 `C-c LETTER' bindings are reserved for user customizations.
1511 ** Internationalization
1513 *** New language environment: Persian.
1515 *** New input method `vietnamese-vni'.
1517 ** Nextstep (GNUstep / Mac OS X) port
1519 *** Support for fullscreen and the frame parameter fullscreen.
1521 *** A file dialog is used for open/save operations initiated from the
1525 * Editing Changes in Emacs 24.3
1527 ** Search and Replace
1529 *** Non-regexp Isearch now performs "lax" space matching.
1530 Each sequence of spaces in the supplied search string may match any
1531 sequence of one or more whitespace characters, as specified by the
1532 variable `search-whitespace-regexp'. (This variable is also used by a
1533 similar existing feature for regexp Isearch.)
1535 *** New Isearch command `M-s SPC' toggles lax space matching.
1536 This applies to both ordinary and regexp Isearch.
1538 *** New option `replace-lax-whitespace'.
1539 If non-nil, `query-replace' uses flexible whitespace matching too.
1542 *** Global `M-s _' starts a symbol (identifier) incremental search,
1543 and `M-s _' in Isearch toggles symbol search mode.
1544 `M-s c' in Isearch toggles search case-sensitivity.
1546 ** Navigation commands
1548 *** New binding `M-g c' for `goto-char'.
1550 *** New binding `M-g TAB' for `move-to-column'.
1552 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1553 interactively with no prefix arg. Previously, it moved to column 1.
1555 ** New option `yank-handled-properties' allows processing of text
1556 properties on yanked text, in ways that are more general than just
1557 removing them (as is done by `yank-excluded-properties').
1559 ** New option `delete-trailing-lines' specifies whether
1560 M-x delete-trailing-whitespace should delete trailing lines at the end
1561 of the buffer. It defaults to t.
1563 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1565 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1566 `ucs-insert' is now an obsolete alias for `insert-char'.
1568 ** The `z' key no longer has a binding in most special modes.
1569 It used to be bound to `kill-this-buffer', but `z' is too easy to
1572 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1573 It copies the region-rectangle as the last rectangle kill.
1577 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1579 *** New option `register-separator' specifies the register containing
1580 the text to put between collected texts for use with
1581 M-x append-to-register and M-x prepend-to-register.
1584 * Changes in Specialized Modes and Packages in Emacs 24.3
1586 ** Common Lisp emulation (CL)
1588 *** CL's main entry is now (require 'cl-lib).
1589 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1590 i.e., all its definitions have the "cl-" prefix (and internal definitions
1591 use the "cl--" prefix).
1593 If `cl' provided a feature under the name `foo', then `cl-lib'
1594 provides it under the name `cl-foo' instead; with the exceptions of the
1595 few `cl' definitions that had to use `foo*' to avoid conflicts with
1596 pre-existing Elisp entities. These have been renamed to `cl-foo'
1597 rather than `cl-foo*'.
1599 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1600 provide the old, non-prefixed names. Some exceptions are listed below:
1602 *** `cl-flet' is not like `flet' (which is deprecated).
1603 Instead it obeys the behavior of Common-Lisp's `flet'.
1604 In particular, in cl-flet function definitions are lexically scoped,
1605 whereas in flet the scoping is dynamic.
1607 *** `cl-labels' is slightly different from `labels'.
1608 The difference is that it relies on the `lexical-binding' machinery
1609 (as opposed to the `lexical-let' machinery used previously) to capture
1610 definitions in closures, so such closures will only work if `lexical-binding'
1613 *** `cl-letf' is not exactly like `letf'.
1614 The only difference is in details that relate to some deprecated usage
1615 of `symbol-function' in place forms.
1617 *** `progv' was rewritten to use the `let' machinery.
1618 A side effect is that variables without corresponding values are bound
1619 to nil rather than being made unbound.
1621 *** The following methods of extending `setf' are obsolete
1622 (use features from gv.el instead):
1623 `define-modify-macro' (use `gv-letplace')
1624 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1625 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1626 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1630 *** Changes are now highlighted using the same color scheme as in
1631 modern VCSes. Deletions are displayed in red (new faces
1632 `diff-refine-removed' and `smerge-refined-removed', and new definition
1633 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1634 and `smerge-refined-added', and new definition of `diff-added').
1636 *** The variable `diff-use-changed-face' defines whether to use the
1637 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1638 changes in context diffs.
1640 *** The new command `diff-delete-trailing-whitespace' removes trailing
1641 whitespace introduced by a diff.
1643 ** Ediff now uses the same color scheme as Diff mode.
1647 A new version of python.el, which provides several new features, including:
1648 per-buffer shells, better indentation, Python 3 support, and improved
1649 shell-interaction compatible with iPython (and virtually any other
1652 *** Some user options have been replaced/renamed, including (old -> new):
1653 **** python-indent -> python-indent-offset
1654 **** python-guess-indent -> python-indent-guess-indent-offset
1655 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1656 **** python-use-skeletons -> python-skeleton-autoinsert
1658 *** Some user options have been removed, including:
1660 **** `python-indent-string-contents': Strings are never indented.
1662 **** `python-honour-comment-indentation':
1663 Comments are always considered as indentation markers.
1665 **** `python-continuation-offset': Indentation is automatically
1666 calculated in a pep8 compliant way depending on the context.
1668 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1669 Have no direct mapping as the shell interaction is completely different.
1671 **** `python-python-command', `python-jython-command':
1672 Replaced by `python-shell-interpreter'.
1674 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1675 `python-pdbtrack-minor-mode-string', `python-source-modes':
1678 *** Some commands have been replaced (old -> new):
1679 **** python-insert-class -> python-skeleton-class
1680 **** python-insert-def -> python-skeleton-def
1681 **** python-insert-for -> python-skeleton-for
1682 **** python-insert-if -> python-skeleton-if
1683 **** python-insert-try/except -> python-skeleton-try
1684 **** python-insert-try/finally -> python-skeleton-try
1685 **** python-insert-while -> python-skeleton-while
1686 **** python-find-function -> python-nav-jump-to-defun
1687 **** python-next-statement -> python-nav-forward-sentence
1688 **** python-previous-statement -> python-nav-backward-sentence
1689 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1690 **** python-end-of-defun-function -> python-nav-end-of-defun
1691 **** python-send-buffer -> python-shell-send-buffer
1692 **** python-send-defun -> python-shell-send-defun
1693 **** python-send-region -> python-shell-send-region
1694 **** python-send-region-and-go -> emulate with python-shell-send-region
1695 and python-shell-switch-to-shell
1696 **** python-send-string -> python-shell-send-string
1697 **** python-switch-to-python -> python-shell-switch-to-shell
1698 **** python-describe-symbol -> python-eldoc-at-point
1702 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1704 *** The D-Bus object manager interface is implemented.
1706 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1707 if their value does not fit into Emacs's integer range.
1709 *** The function `dbus-call-method' is now non-blocking.
1710 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1712 *** Signals can also be sent as unicast messages.
1714 *** The argument list of `dbus-register-signal' has been extended,
1715 according to the new match rule types of D-Bus.
1717 *** `dbus-init-bus' supports private connections.
1719 *** There is a new function `dbus-setenv'.
1721 ** `desktop-path' no longer includes the "." directory.
1722 Desktop files are now located in ~/.emacs.d by default.
1726 *** `dired-do-async-shell-command' executes each file sequentially
1727 if the command ends in `;' (when operating on multiple files).
1728 Otherwise, it executes the command on each file in parallel.
1730 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1731 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1734 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1735 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1736 mark/unmark/flag all files in the active region.
1738 *** The minibuffer default for `=' (`dired-diff') has changed.
1739 It is now the backup file for the file at point, if one exists.
1740 In Transient Mark mode the default is the file at the active mark.
1742 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1743 The global binding for `M-=', `count-words-region' is in effect.
1747 *** New module "notifications", which can send a notification when you
1748 receive a private message or your nickname is mentioned.
1750 *** ERC will look up server/channel names via auth-source and use any
1753 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1754 only applies to messages sent by lurkers.
1756 ** reStructuredText mode
1758 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1759 fontification, comment handling, and customization have all been revised
1762 *** Support for `imenu' and `which-function-mode'.
1764 *** The reStructuredText syntax is more closely covered.
1765 Sphinx support has been improved.
1767 *** `rst-insert-list' inserts new list or continues existing lists.
1769 *** A negative prefix argument always works for `rst-adjust'.
1771 *** The window configuration is reset after displaying a TOC.
1773 *** The constant `rst-version' describes the rst.el package version.
1777 *** Support for percent literals and recognition of regular expressions
1778 in method calls without parentheses with more methods, including Cucumber
1781 *** Improved syntax highlighting and indentation.
1783 *** New command `ruby-toggle-block', bound to `C-c {'.
1785 *** Some non-standard keybindings/commands have been removed:
1787 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1789 **** `ruby-mark-defun'; use `mark-defun'.
1791 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1792 appropriate settings for the variables `beginning-of-defun-function'
1793 and `end-of-defun-function'.
1795 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1796 `reindent-then-newline-and-indent' and `newline' have been removed.
1798 ** Shell Script mode
1800 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1802 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1804 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1808 *** The free software compiler GHDL is supported (and now the default).
1810 *** Support for the VHDL-AMS packages has been added/updated.
1812 *** Updated to the 2002 revision of the VHDL standard.
1814 *** Accepts \r and \f as whitespace.
1818 *** The faces used by Apropos are now directly customizable.
1819 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1820 see the `apropos' Custom group for details.
1822 *** The old options whose values specified faces to use have been removed
1823 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1827 *** This package has been rewritten to use Tabulated List mode.
1829 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1830 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1834 *** Algebraic simplification mode is now the default.
1835 To restrict to the limited simplifications given by the former
1836 default simplification mode, use `m I'.
1840 *** You can customize the header text that appears above each calendar month.
1841 See the variable `calendar-month-header'.
1843 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1845 *** The calendars produced by cal-html include holidays.
1846 Customize `cal-html-holidays' to change this.
1850 *** The major modes from the parser generators "Bovine" and "Wisent"
1851 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1852 are in `auto-mode-alist', and the corresponding manuals are included.
1856 **** Menu support for the "Configuration" feature. This allows users to
1857 choose the active configuration (such as debug or install) from the menu.
1859 **** New command `ede-set' to interactively set project-local variables.
1861 **** Support for compiling, debugging, and running in "generic" projects.
1863 **** Autoconf editing support for M4 macros with complex arguments.
1865 **** Compilation support for the "linux" project type.
1867 **** "simple" projects have been removed; use "generic" projects instead.
1871 **** Support for parsing #include statements inside a namespace in C/C++.
1873 **** Improved support for 'extern "C"' declarations in C/C++.
1875 **** The ability to ignore more common special C/C++ preprocessor symbols,
1876 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1877 If available, include cdefs.h as an additional source of preprocessor symbols.
1879 **** Improved C/C++ function pointer parsing.
1881 **** In Python, support for converting imports to include file names.
1883 **** Ability to dynamically determine the Python load path.
1885 **** Support for the Python 'WITH' and 'AT' keywords.
1887 **** Improved tooltip completion.
1891 **** The SRecode manual is now included.
1893 **** Tag generation supports constructor/destructor settings and system
1894 include differentiation.
1896 **** Addition of 'Framework' support: Frameworks are specified when a
1897 particular kind of library (such as Android) is needed in a common language
1900 **** Support for nested templates and let variables override based on priority.
1902 **** Support for merging tables from multiple related modes, such as
1903 default -> c++ -> arduino.
1905 ** Compile has a new option `compilation-always-kill'.
1909 *** `custom-reset-button-menu' now defaults to t.
1911 *** Non-option variables are never matched in `customize-apropos' and
1912 `customize-apropos-options' (i.e., the prefix argument does nothing for
1913 these commands now).
1917 *** The variables `term-default-fg-color' and `term-default-bg-color'
1918 are now deprecated in favor of the customizable face `term'.
1920 *** You can customize how to display ANSI terminal colors and styles
1921 by customizing the corresponding `term-color-<COLOR>',
1922 `term-color-underline' and `term-color-bold' faces.
1926 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1928 *** Remote processes are now also supported on remote MS-Windows hosts.
1932 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1933 Previously, this slot stored semicolon-separated attribute-value pairs
1934 appended to some imap URLs, but this is not compatible with RFC 3986.
1935 So now the `filename' slot stores the entire path and query components,
1936 and the `attributes' slot is always nil.
1938 *** New function `url-encode-url' for encoding a URI string.
1939 The `url-retrieve' function now uses this to encode its URL argument,
1940 in case that is not properly encoded.
1942 ** notifications.el supports now version 1.2 of the Notifications API.
1943 The function `notifications-get-capabilities' returns the supported
1946 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1947 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1948 `flymake-warning-bitmap'.
1950 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1951 specifying URL types that should be converted to remote file names at
1952 the FFAP prompt. The default is now '("ftp").
1954 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1955 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1957 ** New option `mouse-avoidance-banish-position' specifies where the
1958 `banish' mouse avoidance setting moves the mouse.
1960 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1961 closing brackets to be aligned with the line of the opening bracket.
1963 ** In Proced mode, new command `proced-renice' renices marked processes.
1965 ** New option `async-shell-command-buffer' specifies the buffer to use
1966 for a new asynchronous `shell-command' when the default output buffer
1967 `*Async Shell Command*' is already in use.
1969 ** SQL mode has a new option `sql-db2-escape-newlines'.
1970 If non-nil, newlines sent to the command interpreter will be escaped
1971 by a backslash. The default does not escape the newlines and assumes
1972 that the sql statement will be terminated by a semicolon.
1974 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1975 (and modes that derive from it), sorts the column at point, or the Nth
1976 column if a numeric prefix argument is given.
1978 ** `which-func-modes' now defaults to t, so Which Function mode, when
1979 enabled, applies to all applicable major modes.
1981 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1984 ** Follow mode no longer works by using advice.
1985 The option `follow-intercept-processes' has been removed.
1987 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1989 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1990 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1991 *** semantic-change-hooks -> semantic-change-functions
1992 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1993 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1994 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1995 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1996 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1997 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1998 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1999 *** rcirc-activity-hooks -> rcirc-activity-functions
2000 *** rcirc-print-hooks -> rcirc-print-functions
2001 *** dbus-event-error-hooks -> dbus-event-error-functions
2002 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2003 *** checkdoc-style-hooks -> checkdoc-style-functions
2004 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2005 *** archive-extract-hooks -> archive-extract-hook
2006 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2007 *** hfy-post-html-hooks -> hfy-post-html-hook
2008 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2009 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2010 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2011 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2013 ** Obsolete packages
2016 In most cases, assoc+member+push+delq work just as well.
2017 And in any case it's just a terrible package: ugly semantics, terrible
2018 inefficiency, and not namespace-clean.
2027 * Incompatible Lisp Changes in Emacs 24.3
2029 ** Docstrings starting with `*' no longer indicate user options.
2030 Only variables defined using `defcustom' are considered user options.
2031 The function `user-variable-p' is now an obsolete alias for
2032 `custom-variable-p'.
2034 ** The return values of `defalias', `defun' and `defmacro' have changed,
2035 and are now undefined. For backwards compatibility, `defun' and
2036 `defmacro' currently return the name of the newly defined
2037 function/macro, but this should not be relied upon.
2039 ** `random' by default now returns a different random sequence in
2040 every Emacs run. Use `(random S)', where S is a string, to set the
2041 random seed to a value based on S, in order to get a repeatable
2042 sequence in later calls.
2044 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2045 that substring is inserted literally even if the LITERAL arg is
2046 non-nil, instead of causing an error to be signaled.
2048 ** `select-window' now always makes the window's buffer current.
2049 It does so even if the window was selected before.
2051 ** The function `x-select-font' can return a font spec, instead of a
2052 font name as a string. Whether it returns a font spec or a font name
2053 depends on the graphical library.
2055 ** `face-spec-set' no longer sets frame-specific attributes when the
2056 third argument is a frame (that usage was obsolete since Emacs 22.2).
2058 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2060 ** The CL package's `get-setf-method' function no longer exists.
2061 Generalized variables are now part of core Emacs Lisp, and implemented
2062 differently to the way cl.el used to do it. It is not possible to
2063 define a compatible replacement for `get-setf-method'. See the file
2064 gv.el for internal details of the new implementation.
2066 ** The arguments of `dbus-register-signal' are no longer just strings,
2067 but keywords or keyword-string pairs. The old argument list will
2068 still be supported for Emacs 24.x.
2070 ** Miscellaneous name changes
2071 Some Lisp symbols have been renamed to correct their spelling,
2072 or to be more consistent with standard Emacs terminology.
2074 *** Renamed functions
2075 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2076 **** inactivate-input-method -> deactivate-input-method
2077 **** quail-inactivate -> quail-deactivate
2078 **** robin-inactivate -> robin-deactivate
2079 **** viper-inactivate-input-method -> viper-deactivate-input-method
2080 **** viper-inactivate-input-method-action ->
2081 viper-deactivate-input-method-action
2082 **** ucs-input-inactivate -> ucs-input-deactivate
2085 The old hooks are still supported for backward compatibility, but they
2086 are deprecated and will be removed eventually.
2087 **** input-method-inactivate-hook -> input-method-deactivate-hook
2088 **** robin-inactivate-hook -> robin-deactivate-hook
2089 **** quail-inactivate-hook -> quail-deactivate-hook
2091 *** Renamed variables
2092 **** follow-deactive-menu -> follow-inactive-menu
2093 **** inactivate-current-input-method-function ->
2094 deactivate-current-input-method-function
2096 ** Some obsolete functions, variables, and faces have been removed:
2097 *** `last-input-char', `last-command-char', `unread-command-char'
2098 *** `facemenu-unlisted-faces'
2099 *** `rmail-decode-mime-charset'
2100 *** `iswitchb-read-buffer'
2101 *** `sc-version', `sc-submit-bug-report'
2102 *** `set-char-table-default'
2103 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2104 *** `compile-internal'
2106 *** `mode-line-inverse-video'
2107 *** `follow-mode-off-hook'
2108 *** `cvs-commit-buffer-require-final-newline'
2109 (use `log-edit-require-final-newline' instead)
2110 *** `cvs-changelog-full-paragraphs'
2111 (use `log-edit-changelog-full-paragraphs' instead)
2112 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2113 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2114 *** `vc-master-templates' (use `vc-handled-backends' instead)
2115 *** `vc-checkout-carefully'
2118 * Lisp Changes in Emacs 24.3
2120 ** CL-style generalized variables are now in core Elisp.
2121 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2122 You can define your own generalized variables using `gv-define-simple-setter',
2123 `gv-define-setter', etc.
2125 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2126 This can significantly speed up execution of non-byte-compiled code,
2127 but can also bump into previously unnoticed cyclic dependencies.
2128 These are generally harmless: they will simply cause the macro calls
2129 to be left for later expansion (as before), but will result in a
2130 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2131 You may wish to restructure your code so this does not happen.
2133 ** New sampling-based Elisp profiler.
2134 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2135 When finished, use M-x profiler-stop. The sampling rate can be based on
2136 CPU time or memory allocations.
2138 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2139 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2141 ** New macros `setq-local' and `defvar-local'.
2143 ** Face underlining can now use a wave.
2145 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2146 of `read-regexp' accepts a string ending with a colon and space, and its
2147 second argument DEFAULTS can be a list of strings accessible via `M-n'
2148 in the minibuffer ahead of other hard-coded useful regexp-related values.
2149 More commands use `read-regexp' now to read their regexp arguments.
2153 *** New function `completion-table-with-quoting' to handle completion
2154 in the presence of quoting, such as file completion in shell buffers.
2156 *** New function `completion-table-subvert' to use an existing completion
2157 table, but with a different prefix.
2161 *** New error type and new function `user-error'.
2162 These do not trigger the debugger.
2164 *** New option `debugger-bury-or-kill', saying what to do with the
2165 debugger buffer when exiting debug.
2167 *** Set `debug-on-message' to enter the debugger when a certain
2168 message is displayed in the echo area. This can be useful when trying
2169 to work out which code is doing something.
2171 *** New var `inhibit-debugger', automatically set to prevent accidental
2172 recursive invocations.
2176 *** New command `fit-frame-to-buffer' adjusts the frame height to
2179 *** The command `fit-window-to-buffer' can adjust the frame height
2180 if the new option `fit-frame-to-buffer' is non-nil.
2182 *** New macro `with-temp-buffer-window', similar to
2183 `with-output-to-temp-buffer'.
2185 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2188 *** New option `switch-to-buffer-preserve-window-point' to restore a
2189 window's point when switching buffers.
2191 *** New display action alist entries `window-height' and `window-width'
2192 specify the size of new windows created by `display-buffer'.
2194 *** New display action alist entry `pop-up-frame-parameters', if
2195 non-nil, specifies frame parameters to give any newly-created frame.
2197 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2198 tells display action functions to avoid changing which frame is
2201 *** New display action alist entry `previous-window', if non-nil,
2202 specifies window to reuse in `display-buffer-in-previous-window'.
2204 *** New display action functions `display-buffer-below-selected',
2205 and `display-buffer-in-previous-window'.
2207 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2208 now accept a third argument to avoid choosing the selected window.
2210 *** Additional values recognized for option `window-combination-limit'.
2212 *** The following variables are obsolete, as they can be replaced by
2213 appropriate entries in the `display-buffer-alist' function introduced
2215 **** `dired-shrink-to-fit'
2216 **** `display-buffer-reuse-frames'
2217 **** `display-buffer-function'
2218 **** `special-display-buffer-names'
2219 **** `special-display-frame-alist'
2220 **** `special-display-function'
2221 **** `special-display-regexps'
2225 *** `current-time-string' no longer requires that its argument's year
2226 must be in the range 1000..9999. It now works with any year supported
2227 by the underlying C implementation.
2229 *** `current-time' now returns extended-format time stamps
2230 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2231 PSEC is typically a multiple of 1000 on current machines. Other
2232 functions that use this format, such as `file-attributes' and
2233 `format-time-string', have been changed accordingly. Old-format time
2234 stamps are still accepted.
2236 *** The format of timers in `timer-list' and `timer-idle-list' is now
2237 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2238 The PSECS slot is new, and uses picosecond resolution. It can be
2239 accessed via the new `timer--psecs' accessor.
2241 *** Last-modified time stamps in undo lists now are of the form
2242 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2246 *** Improved security when handling persistent objects:
2248 **** `eieio-persistent-read' now features optional arguments for specifying
2249 the class to load, as well as a flag stating whether subclasses are allowed;
2250 if provided, other classes will be rejected by the reader. For
2251 compatibility with existing code, if the class is omitted only a
2254 **** New specialized reader for pulling in classes and signaling errors
2255 without evaluation of suspicious code.
2257 **** All slots that contain objects must have a :type. Slots with lists
2258 of objects must use a new type predicate for a list of an object type.
2260 *** Support for `find-function' and similar utilities, through the addition
2261 of filename support to generated symbols.
2263 ** Floating point functions now always return special values like NaN,
2264 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2265 Previously, they returned NaNs on some platforms but signaled errors
2266 on others. The affected functions are acos, asin, tan, exp, expt,
2267 log, log10, sqrt, and mod.
2269 ** New fringe bitmap `exclamation-mark'.
2271 ** Miscellaneous changes to special forms and macros
2273 *** `defun' and `defmacro' are now macros rather than special forms.
2275 *** `kbd' is now a function rather than a macro.
2277 ** Miscellaneous new functions
2279 *** `set-temporary-overlay-map' sets up a temporary keymap that
2280 takes precedence over most other maps for a short while (normally one key).
2282 *** `autoloadp' tests if its argument is an autoloaded object.
2284 *** `autoload-do-load' performs the autoloading operation.
2286 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2288 *** `file-name-base' returns a file name sans directory and extension.
2290 *** `function-get' fetches a function property, following aliases.
2292 *** `posnp' tests if an object is a `posn'.
2294 *** `system-users' returns the user names on the system.
2296 *** `system-groups' returns the group names on the system.
2298 *** `tty-top-frame' returns the topmost frame of a text terminal.
2300 ** The following functions and variables are obsolete:
2301 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2302 *** `buffer-has-markers-at'
2303 *** `macro-declaration-function' (use `macro-declarations-alist')
2304 *** `window-system-version' (provides no useful information)
2305 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2306 *** `query-replace-interactive'
2307 *** `font-list-limit' (has had no effect since Emacs < 23)
2310 * Changes in Emacs 24.3 on Non-Free Operating Systems
2312 ** Cygwin builds can use the native MS Windows user interface.
2313 Pass `--with-w32' to configure. The default remains the X11 interface.
2315 ** Two new functions are available in Cygwin builds:
2316 `cygwin-convert-file-name-from-windows' and
2317 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2318 code to access the Cygwin file-name mapping machinery to convert
2319 between Cygwin and Windows-native file and directory names.
2321 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2322 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2323 `mouse-autoselect-window'.
2325 ** On MS Windows Vista and later Emacs now supports symbolic links.
2327 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2328 support for libxml2, even if its presence is detected.
2330 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2332 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2333 directories to the search path. You must add them yourself if you want them.
2336 * Changes in Emacs 24.2
2338 ** This is mainly a bug-fix release.
2341 * Installation Changes in Emacs 24.1
2343 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2344 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2345 also depend on Gtk+. You can disable them with --without-rsvg and
2348 ** Emacs can be compiled with GnuTLS support.
2349 This happens by default if a suitably recent version of the library is
2350 found at build time. To prevent this, use the configure option
2351 `--without-gnutls'. See below for GnuTLS features.
2353 ** Emacs can be compiled with SELinux support.
2354 This happens by default if a suitably recent version of the library is
2355 found at build time. To prevent this, use the configure option
2356 `--without-selinux'. See below for SELinux features.
2358 ** Emacs can be compiled with ImageMagick support.
2359 This happens by default if a suitably recent version of the library is
2360 found at build time. To prevent this, use the configure option
2361 `--without-imagemagick'. See below for ImageMagick features.
2362 This feature is not available for the Nextstep or MS ports.
2364 ** Emacs can be compiled with libxml2 support.
2365 This happens by default if a suitably recent version of the library is
2366 found at build time. To prevent this, use the configure option
2367 `--without-xml2'. See below for libxml2 features.
2369 ** By default, the installed Info and man pages are compressed.
2370 You can disable this by configuring --without-compress-info.
2372 ** New configure option --with-wide-int.
2373 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2374 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2377 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2378 These provide no new functionality, they just remove the need to edit
2379 lib-src/Makefile by hand in order to use the associated features.
2381 ** New configure option --enable-use-lisp-union-type.
2382 This is only useful for Emacs developers to debug certain types of bugs.
2383 This is not a new feature; only the configure flag is new.
2385 ** The standalone programs digest-doc and sorted-doc are removed.
2386 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2388 ** The standalone program `fakemail' is removed.
2389 If you need it, feedmail.el provides a superset of the functionality.
2392 * Startup Changes in Emacs 24.1
2394 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2395 command line arguments, and the EMACS_UNIBYTE environment variable, no
2396 longer have any effect. (They were declared obsolete in Emacs 23.)
2398 ** New command line option `--no-site-lisp' removes site-lisp directories
2399 from load-path. -Q now implies this. This option does not affect the
2400 EMACSLOADPATH environment variable (and hence has no effect for
2404 * Changes in Emacs 24.1
2408 *** Many packages now use the `completion-at-point' command,
2409 rather than implementing separate completion commands.
2411 *** `completion-at-point' now handles tags and semantic completion.
2413 *** Completion in a non-minibuffer now tries to detect the end of completion
2414 and pops down the *Completions* buffer accordingly.
2416 *** New option `completion-cycle-threshold' allows completion cycling.
2418 *** New option `completion-category-overrides' for overriding the
2419 default completion style in certain circumstances.
2421 *** New completion style `substring'.
2423 *** Completion of buffer names uses `substring' completion by default.
2425 *** The option `widget-complete-field' has been removed.
2429 *** The first time you try sending mail, Emacs asks for a mail method.
2430 This is implemented by a new default for `send-mail-function', which
2431 is `sendmail-query-once'. This offers to use the smtpmail package, or
2432 to use the old defaults relying on external mail facilities
2433 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2434 `mailclient-send-it' on Windows).
2436 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2437 transfers the report to your desktop's preferred mail client, if there
2438 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2441 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2442 and Mail mode changes
2444 ** Emacs server and client changes
2446 *** New option `server-port' specifies the port for TCP Emacs servers.
2448 *** New emacsclient argument -q/--quiet suppresses some status messages.
2450 *** New emacsclient argument --frame-parameters specifies the frame
2451 parameters of any newly-created graphical frame.
2453 *** If emacsclient shuts down due to Emacs signaling an error,
2454 its exit status is 1.
2456 *** New emacsclient argument --parent-id ID.
2457 This opens a client frame in parent X window ID, via XEmbed, similar
2458 to the --parent-id argument to Emacs.
2460 ** Internationalization changes
2462 *** Emacs now supports display and editing of bidirectional text.
2463 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2464 displayed in the correct visual order as expected by users of those
2465 scripts. The display reordering is a "full bidirectionality" class
2466 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2467 with no RTL text should look exactly the same as before.
2469 **** New buffer-local variable `bidi-display-reordering'.
2470 To disable display reordering in a buffer, change this to nil.
2472 **** New buffer-local variable `bidi-paragraph-direction'.
2473 If nil (the default), Emacs determines the base direction of each
2474 paragraph from its text, as specified by the UBA. Setting the value
2475 to `right-to-left' or `left-to-right' forces a base direction on each
2478 Paragraphs with right-to-left base direction are displayed starting at
2479 the right window edge.
2481 *** Enhanced support for characters with no glyphs in available fonts,
2482 or, on text terminals, characters that cannot be encoded by the
2483 terminal coding system. The new option `glyphless-char-display-control'
2484 specifies how to display them: as a hexadecimal code in a box, a thin
2485 1-pixel space, an empty box, etc.
2487 *** New input methods for Farsi and Bulgarian
2488 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2490 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2491 (U+2010 and U+2011).
2493 *** New Hebrew translation of the Emacs Tutorial.
2494 Type `C-u C-h t' to choose it in case your language setup doesn't
2495 automatically select it.
2497 ** An Emacs Lisp package manager is now included.
2498 This is a convenient way to download and install additional packages,
2499 from a package repository at http://elpa.gnu.org.
2501 *** M-x list-packages shows a list of packages, which can be
2502 selected for installation.
2504 *** New command `describe-package', bound to `C-h P'.
2506 *** By default, all installed packages are loaded automatically when
2507 Emacs starts up. To disable this, set `package-enable-at-startup' to
2508 nil. To specify the packages to load, customize `package-load-list'.
2510 ** Custom theme changes
2512 *** New command `M-x customize-themes', which provides a convenient
2513 interface for enabling and disabling Custom themes.
2515 *** New option `custom-theme-load-path' is the load path for themes.
2516 Emacs no longer looks for Custom themes in `load-path'. The default
2517 value of `custom-theme-load-path' says to look for themes in
2518 `custom-theme-directory', followed by a subdirectory of
2519 `data-directory' named "themes/", which contains a small selection of
2520 built-in Custom themes.
2522 *** New option `custom-safe-themes' records known-safe theme files.
2523 If a theme is not in this list, Emacs queries before loading it, and
2524 offers to save the theme to `custom-safe-themes' automatically. By
2525 default, all themes included in Emacs are treated as safe.
2527 ** Improved GTK integration
2529 *** GTK scroll-bars are now placed on the right by default.
2530 The function `set-scroll-bar-mode' can change this.
2532 *** GTK tool bars can have just text, just images or images and text.
2533 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2534 the default is taken from desktop settings.
2536 *** GTK tool bars can be placed on any edge of the frame.
2537 The frame-parameter tool-bar-position controls this. It takes the
2538 values top, left, right or bottom. The Options => Show/Hide menu has
2541 *** The default colors for selected text (the `region' face) are taken
2542 from the GTK theme when Emacs is built with GTK.
2544 *** Emacs uses GTK tooltips by default if built with GTK.
2545 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2547 ** Graphical interface changes
2549 *** On graphical displays, the mode-line no longer ends in dashes.
2550 Also, the first dash (which does not indicate anything) is just
2551 displayed as a space.
2553 *** `menu-bar-select-buffer-function' lets you choose another operation
2554 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2556 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2557 built with Xft. These fonts can be set via X resources, for example:
2558 Emacs.pane.menubar.font: Courier-12
2562 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2563 or if it receives a SIGINT signal in batch mode.
2565 *** `kill-emacs-hook' is now also run in batch mode.
2566 Third-party code which adds to `kill-emacs-hook' should check if they
2567 do the right thing in batch mode.
2569 ** Scrolling changes
2571 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2572 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2573 of buffer at first key-press (instead they move to top/bottom of buffer)
2574 when `scroll-error-top-bottom' is non-nil.
2576 *** New option `scroll-error-top-bottom' (see above).
2578 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2579 scroll a line instead of full screen.
2581 *** New property `scroll-command' should be set on a command's symbol to
2582 define it as a scroll command affected by `scroll-preserve-screen-position'.
2584 *** If you customize `scroll-conservatively' to a value greater than 100,
2585 Emacs will never recenter point in the window when it scrolls due to
2586 cursor motion commands or commands that move point (e.f., `M-g M-g').
2587 Previously, you needed to use `most-positive-fixnum' as the value of
2588 `scroll-conservatively' to achieve the same effect.
2590 *** "Aggressive" scrolling now honors the scroll margins.
2591 If you customize `scroll-up-aggressively' or
2592 `scroll-down-aggressively' and move point off the window, Emacs now
2593 scrolls the window so as to avoid positioning point inside the scroll
2596 ** Basic SELinux support has been added.
2597 This requires Emacs to be linked with libselinux at build time.
2599 *** Emacs preserves the SELinux file context when backing up.
2600 Also, the function `copy-file' has an extra optional argument for
2601 preserving SELinux context, and the return value of `backup-buffer'
2602 now includes the SELinux context.
2604 *** New functions `file-selinux-context' and `set-file-selinux-context'
2605 get and set the SELinux context of a file.
2609 *** `delete-by-moving-to-trash' now only affects commands that specify
2610 trashing. This avoids inadvertently trashing temporary files.
2612 *** Calling `delete-file' or `delete-directory' with a prefix argument
2613 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2615 ** File- and directory-local variable changes
2617 *** You can stop directory local vars from applying to subdirectories.
2618 Add an element (subdirs . nil) to the alist portion of any variables
2619 settings to indicate that the section should not apply to
2622 *** Directory local variables can apply to some file-less buffers.
2623 Affected modes include dired, vc-dir, and log-edit. For example,
2624 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2625 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2626 `hack-dir-local-variables-non-file-buffer' to support this.
2628 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2629 Instead, use "eval: (minor-mode 1)".
2631 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2632 to `inhibit-local-variables-regexps'. As the name suggests, it now
2633 applies to ALL file local variables, not just -*- lines. The
2634 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2639 *** The `quit-window' command now restores the last buffer displayed
2640 in the quitted window.
2642 *** Resizing an Emacs frame now preserves proportional window sizes,
2643 modulo restrictions like window minimum sizes and fixed-size windows.
2645 *** The behavior of `display-buffer' is now customizable in detail.
2647 **** New option `display-buffer-base-action' specifies a list of
2648 user-determined display "actions" (functions and optional arguments
2649 for choosing the displaying window).
2651 This takes precedence over the default display action, which is
2652 specified by `display-buffer-fallback-action'.
2654 **** New option `display-buffer-alist' maps buffer name regexps to
2655 display actions, taking precedence over `display-buffer-base-action'.
2657 *** New option `window-combination-limit'.
2658 The new option `window-combination-limit' allows to return the space
2659 obtained for resizing or creating a window more reliably to the window
2660 from which such space was obtained.
2662 *** New option `window-combination-resize'.
2663 The new option `window-combination-resize' allows to split a window that
2664 otherwise cannot be split because it's too small by stealing space from
2665 other windows in the same combination. Subsequent resizing or deletion
2666 of the window will resize all windows in the same combination as well.
2668 *** New option `frame-auto-hide-function' lets you choose between
2669 iconifying or deleting a frame when burying a buffer in a dedicated
2670 frame, or quitting a window showing a buffer in a frame of its own.
2672 *** New commands `maximize-window' and `minimize-window'.
2673 These maximize and minimize the size of a window within its frame.
2675 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2676 These functions allow to navigate through the live buffers that have
2677 been shown in a specific window.
2679 ** Minibuffer changes
2681 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2682 This is handy for minibuffer-only frames, and is also used for the feature
2683 where mouse-1 pops up *Messages*"', which can now easily be changed.
2685 *** Minibuffers set `truncate-lines' to nil.
2686 If you want to change the value to something else, you could use
2687 for example `minibuffer-setup-hook'.
2689 ** `auto-mode-case-fold' is now enabled by default.
2691 ** `backup-by-copying-when-mismatch' now defaults to t.
2693 ** New basic faces `error', `warning', `success'.
2694 These are used to highlight text indicating failure, caution or
2695 successful operation.
2697 ** New option `list-colors-sort' defines the color sort order
2698 for `list-colors-display'.
2700 ** The variable `focus-follows-mouse' now always defaults to nil.
2703 * Editing Changes in Emacs 24.1
2707 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2708 `isearch-yank-line'.
2710 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2711 `isearch-yank-kill'.
2713 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2715 ** New commands `count-words-region' and `count-words'.
2717 *** M-= is bound to `count-words-region', not `count-lines-region'.
2718 The `count-words-region' command, when called interactively, reports
2719 the number of lines, words, and characters in the region. It is a
2720 superset of the old `count-lines-region', which is now an obsolete
2723 ** The command `just-one-space' (M-SPC), if given a negative argument,
2724 also deletes newlines around point.
2728 *** New option `delete-active-region'.
2729 If non-nil, [delete] and DEL delete the region if it is active and no
2730 prefix argument is given. If set to `kill', those commands kill
2733 *** New command `delete-forward-char', bound to [delete].
2734 This is meant for interactive use, and obeys `delete-active-region'.
2735 The command `delete-char' does not obey `delete-active-region'.
2737 *** `delete-backward-char' is now a Lisp function.
2738 Apart from obeying `delete-active-region', its behavior is unchanged.
2739 However, the byte compiler now warns if it is called from Lisp; Lisp
2740 callers should use delete-char with a negative argument instead.
2742 *** The option `mouse-region-delete-keys' has been deleted.
2744 ** Selection changes.
2746 The default handling of clipboard and primary selections has been
2747 changed to conform with modern X applications. In short, most
2748 commands for killing and yanking text now use the clipboard, while
2749 mouse commands use the primary selection.
2751 In the following, we provide a list of these changes, followed by a
2752 list of steps to get the old behavior back if you prefer that.
2754 *** `select-active-regions' now defaults to t.
2755 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2756 the kill ring. The selected text is put in the primary selection, if
2757 the system possesses a separate primary selection facility (e.g. X).
2759 **** `select-active-regions' also accepts a new value, `only'.
2760 This means to only set the primary selection for temporarily active
2761 regions (usually made by mouse-dragging or shift-selection);
2762 "ordinary" active regions, such as those made with C-SPC followed by
2763 point motion, do not alter the primary selection.
2765 **** `mouse-drag-copy-region' now defaults to nil.
2767 *** mouse-2 is now bound to `mouse-yank-primary'.
2768 This pastes from the primary selection, ignoring the kill-ring.
2769 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2771 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2773 *** `x-select-enable-primary' now defaults to nil.
2774 Thus, commands that kill text or copy it to the kill-ring (such as
2775 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2777 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2778 exactly equivalent to M-w, C-w, and C-y respectively.
2780 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2781 non-nil by default, as Windows does not support the primary selection
2782 between applications.
2784 *** To return to the previous behavior, do the following:
2786 **** Change `select-active-regions' to nil.
2787 **** Change `mouse-drag-copy-region' to t.
2788 **** Change `x-select-enable-primary' to t (on X only).
2789 **** Change `x-select-enable-clipboard' to nil.
2790 **** Bind `mouse-yank-at-click' to mouse-2.
2792 *** Support for X cut buffers has been removed.
2794 *** X clipboard managers are now supported.
2795 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2797 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2798 in the current rectangle. With a prefix argument, this prompts for a
2799 number to count from and for a format string.
2801 ** `redisplay-dont-pause' now defaults to t.
2802 This makes Emacs feel more responsive to editing commands that arrive
2803 at high rate, e.g. if you lean on some key, because stopping redisplay
2804 in the middle (when this variable is nil) forces more expensive
2805 updates later on, and Emacs appears to be unable to keep up.
2807 ** The behavior of <TAB> for active regions in Text mode has changed.
2808 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2809 when the region is active causes Emacs to indent all the lines in the
2810 region, aligning them with the line previous to the first line in the
2811 region (or with the left margin if there is no previous line).
2813 ** When `occur' is called with a prefix argument, matching strings are
2814 collected into the `*Occur*' buffer without line numbers. If there
2815 are parenthesized subexpressions in the specified regexp, `occur'
2816 reads replacement text that may contain \\& and \\N whose convention
2817 follows `replace-match'.
2820 * Changes in Specialized Modes and Packages in Emacs 24.1
2822 ** Archive Mode has basic support for browsing and updating 7z archives.
2826 *** BibTeX mode now supports biblatex.
2827 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2828 `bibtex-entry-field-alist' is now an obsolete alias for
2829 `bibtex-BibTeX-entry-alist'.
2831 *** New command `bibtex-search-entries', bound to C-c C-a.
2833 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2835 *** New variable `bibtex-search-entry-globally'.
2839 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2841 *** The default browser used by the package is now the "xdg-open" program,
2842 on platforms that support it. This calls your desktop's preferred browser.
2846 *** Support for musical notes.
2848 *** Support for logarithmic units.
2850 *** No longer uses the tex prefix for TeX specific unit names when
2851 using TeX or LaTeX mode.
2853 *** New option to highlight selections using faces.
2855 *** `calc-histogram' has the option of using a vector to determine the bins.
2857 *** New "O" option prefix.
2859 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2861 ** Calendar, Diary, and Appt
2863 *** Diary entries can contain non-printing "comments".
2864 See the variable `diary-comment-start'.
2866 *** Appointments can specify their individual warning times.
2867 See the variable `appt-warning-time-regexp'.
2869 *** The function specified by `appt-disp-window-function' may be passed
2870 lists of arguments if multiple appointments are due at similar times.
2871 If you are using a custom function for this, you should update it.
2873 *** New function `diary-hebrew-birthday'.
2875 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2876 may no longer be nil, but must all be strings.
2878 *** The obsolete (since Emacs 22.1) method of enabling the appt
2879 package by adding `appt-make-list' to `diary-hook' has been removed.
2880 Use `appt-activate' instead.
2882 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2883 appt-issue-message (use the function appt-activate)
2884 appt-visible/appt-msg-window (use the variable appt-display-format)
2886 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2887 view-diary-entries, list-diary-entries, show-all-diary-entries
2891 *** New feature to "guess" the style in an existing buffer.
2892 The main entry point is M-x c-guess.
2894 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2896 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2897 Thus C-M-a will, by default, go to the beginning of the immediate function,
2900 *** "Macros with semicolons" can be registered for correct indentation.
2901 Where such a macro ends a line (no semicolon) the next statement is no longer
2902 parsed as a statement continuation.
2904 ** Comint and modes derived from it use the standard completion code.
2908 *** Compilation mode can be used without Font Lock mode.
2909 `compilation-parse-errors-function' is now obsolete.
2911 *** New variable `compilation-filter-start', which is bound while
2912 `compilation-filter-hook' runs. It records the start position of the
2913 text inserted by `compilation-filter'.
2915 *** `compilation-error-screen-columns' and `compilation-first-column'
2916 are obeyed in the editing buffer. So programming language modes can
2917 set them, whereas previously only the value in the *Compilation*
2922 *** Customize buffers now contain a search field.
2923 The search is performed using `customize-apropos'.
2924 To turn off the search field, set `custom-search-field' to nil.
2926 *** Options in customize group buffers start out hidden if not customized.
2927 Use the arrow to the left of the option name to toggle visibility.
2929 *** custom-buffer-sort-alphabetically now defaults to t.
2931 *** The color widget now has a "Choose" button, which allows you to
2932 choose a color via `list-colors-display'.
2936 *** It is now possible to access buses other than the default system
2939 *** The `dbus-register-method' and `dbus-register-property' functions
2940 optionally do not register names.
2942 *** The new function `dbus-register-service' registers a known service
2943 name on a D-Bus without also registering a property or a method.
2947 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2948 if called with a prefix argument, read a file name from the minibuffer
2949 instead of using the current buffer.
2951 *** The "dired local variables" feature of Dired-x is obsolete.
2952 The standard directory local variables feature replaces it.
2956 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2957 controlling attempts to autojoin a channel.
2959 *** New variable `erc-coding-system-precedence': If we use `undecided'
2960 as the server coding system, this variable will then be consulted.
2961 The default is to decode strings that can be decoded as utf-8 as
2962 utf-8, and do the normal `undecided' decoding for the rest.
2966 *** The default value of `eshell-directory-name' has changed
2967 to be an "eshell" directory in `user-emacs-directory'.
2968 The old "~/.eshell/" directory is still used if it exists, though.
2972 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2973 It now supports multithread non-stop debugging and simultaneous
2974 debugging of several threads.
2978 *** RET (`image-toggle-animation') toggles animation, if applicable.
2979 Animation plays once, unless the option `image-animate-loop' is non-nil.
2983 *** New command M-x info-display-manual displays a named Info manual.
2984 If that manual is already visited in some Info buffer, it displays
2985 that buffer. (This is handy if you have many manuals in many *info*
2986 buffers, and don't remember the name of the buffer visiting the manual
2987 you want to consult.) Otherwise, it loads and displays the manual.
2989 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2990 This is for compatibility with the stand-alone Info reader program,
2991 and also because `Info-edit' is a rarely used command that is disabled
2994 ** Mail mode changes (not Message mode)
2996 *** New command M-x mail-add-attachment for adding MIME attachments
2998 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2999 (Its name is misleading, since it has nothing to do with MIME
3000 attachments.) The old name is now an obsolete alias to the new name.
3002 ** MH-E has been updated to MH-E version 8.3.1.
3003 See MH-E-NEWS for details.
3005 ** Modula-2 mode provides auto-indentation.
3007 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3009 ** nXML mode no longer binds C-RET to `nxml-complete'.
3010 Completion is now performed via `completion-at-point', bound to C-M-i
3011 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3012 default), this performs tag completion.
3014 ** Org mode has been updated to version 7.8.09.
3015 See ORG-NEWS for details.
3017 ** Prolog mode has been completely revamped, with lots of additional
3018 functionality such as more intelligent indentation, electricity,
3019 support for more variants, including Mercury, and a lot more.
3023 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3024 in the Rmail incoming message.
3026 *** The variable `rmail-message-filter' no longer has any effect.
3027 This change was made in Emacs 23.1 but was not advertised at the time.
3028 Try using `rmail-show-message-hook' instead.
3032 *** M-x shell prompts for the shell path name if the default directory
3033 is a remote file name and neither the environment variable $ESHELL nor
3034 the variable `explicit-shell-file-name' is set.
3036 *** TAB is now bound to the standard `completion-at-point' command,
3037 which now implements the pcomplete rules for shell command completion.
3041 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3042 if the mail server supports them. This uses either built-in GnuTLS
3043 support, or the starttls.el library. Customize `smtpmail-stream-type'
3046 *** The variable `smtpmail-auth-credentials' has been removed.
3047 By default, the information is now stored in the file ~/.authinfo.
3048 This was the default value of smtpmail-auth-credentials. If you had
3049 customized smtpmail-auth-credentials to a list of user names and
3050 passwords, those settings are not used. During your first connection
3051 to the smtp server, Emacs will prompt for the user name and password,
3052 and offer to save them to ~/.authinfo. Or you can manually copy the
3053 credentials to ~/.authinfo. For example, if you had
3055 (setq smtpmail-auth-credentials
3056 '(("mail.example.org" 25 "jim" "s!cret")))
3058 then the equivalent line in ~/.authinfo would be
3060 machine mail.example.org port 25 login jim password s!cret
3062 See the auth-source manual for more information, e.g. on encrypting
3063 the credentials file.
3065 *** The variable `smtpmail-starttls-credentials' has been removed.
3066 If you had that set, you need to put
3068 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3070 in your ~/.authinfo file instead.
3072 *** SMTPmail defaults to using the address in the From: header as the
3073 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3074 to the address you wish to use instead.
3078 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3079 and `sql-oracle-scan-on'.
3081 *** New options controlling prompting for login parameters.
3082 Each supported product has a custom variable `sql-*-login-params',
3083 which is a list of the parameters to be prompted for before a
3084 connection is established.
3086 *** The command `sql-product-interactive' now takes a prefix argument,
3087 which causes it to prompt for an SQL product.
3089 *** Product-specific SQL interactive commands now take prefix arguments.
3090 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3091 given a prefix argument, prompt for a name for the SQL interactive
3092 buffer. This reduces the need for calling `sql-rename-buffer'.
3094 *** SQL interactive modes suppress command continuation prompts, and
3095 replace tabs with spaces. The first change impacts multiple line SQL
3096 statements entered with C-j between each line, statements yanked into
3097 the buffer and statements sent with `sql-send-*' functions. The
3098 second prevents the MySQL and Postgres interpreters from listing
3099 object name completions when sent text via `sql-send-*' functions.
3101 *** New command `sql-connect' starts a predefined SQLi session,
3102 using the login parameters from `sql-connection-alist'.
3104 *** New "Save Connection" menu item in SQLi buffers.
3105 This gathers the login params specified for the SQLi session, if it
3106 was not started by a connection, and saves them as a new connection.
3108 *** New commands for listing database objects and details:
3109 sql-list-all and sql-list-table.
3111 *** An API for manipulating SQL product definitions has been added.
3115 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3119 *** New inline access method "ksu" (kerberized su).
3121 *** The following access methods are discontinued: "ssh1_old",
3122 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3124 *** The user option `remote-file-name-inhibit-cache' controls whether
3125 remote file attributes are cached for better performance.
3127 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3128 default value to "".
3130 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3131 for remote machines which support SELinux.
3133 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3134 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3135 the degree of parallelism.
3137 ** VC and related modes
3139 *** Support for pulling on distributed version control systems.
3140 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3141 supported (currently with Bzr, Git, and Mercurial), to update the
3142 current branch and working tree. A prefix argument means to prompt
3143 the user for specifics, e.g. a pull location.
3145 *** `vc-update' is now an alias for `vc-pull'.
3147 *** Support for merging on distributed version control systems.
3148 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3149 is supported (currently with Bzr, Git, and Mercurial), to merge
3150 changes from another branch into the current one. It prompts for
3151 specifics, e.g. a merge source.
3153 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3154 shows a diff while querying the user. It defaults to t.
3156 *** Log entries in some Log View buffers can be toggled to display a
3157 longer description by typing RET (log-view-toggle-entry-display).
3158 This is currently supported for Bzr, Git, and Mercurial (to support
3159 another backend, define a `log-view-expanded-log-entry-function').
3160 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3161 use this to display the full log entry for the revision at point.
3163 *** New command `vc-ediff' allows visual comparison of two revisions
3164 of a file similar to `vc-diff', but using ediff backend.
3166 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3167 this was not advertised at the time.
3169 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3170 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3171 this was not advertised at the time.
3177 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3179 *** partial-completion-mode (complete.el) is obsolete.
3180 You can get a comparable behavior with:
3181 (setq completion-styles '(partial-completion initials))
3182 (setq completion-pcm-complete-word-inserts-delimiters t)
3184 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3186 *** pgg is obsolete (use EasyPG instead).
3188 *** sregex.el is obsolete, since rx.el is a strict superset.
3190 *** s-region.el and pc-select.el are obsolete.
3191 They are superseded by shift-select-mode, enabled by default since 23.1.
3193 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3197 *** The Landmark game is now invoked with `landmark', not `lm'.
3198 Its functions and variables have been similarly renamed.
3200 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3201 (This interfered with cua-mode.)
3203 *** f90.el has some support for Fortran 2008 syntax.
3205 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3207 *** New command `nato-region' converts text to NATO phonetic alphabet.
3210 * New Modes and Packages in Emacs 24.1
3212 ** Occur Edit mode applies edits made in *Occur* buffers to the
3213 original buffers. It is bound to "e" in Occur mode.
3215 ** New global minor mode electric-pair-mode.
3216 When enabled, typing an open parenthesis automatically inserts the
3217 matching closing one.
3219 ** New global minor mode electric-indent-mode.
3220 When enabled, typing certain characters triggers reindentation.
3221 Major modes wishing to use this can set electric-indent-chars or
3222 electric-indent-functions.
3224 ** New global minor mode electric-layout-mode.
3225 When enabled, typing certain characters automatically inserts newlines.
3226 Major modes wishing to use this can set electric-layout-rules.
3228 ** tabulated-list.el provides a generic major mode for tabulated data,
3229 from which other modes can be derived.
3231 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3233 ** secrets.el is an implementation of the Secret Service API, an
3234 interface to password managers like GNOME Keyring or KDE Wallet. The
3235 Secret Service API requires D-Bus for communication. The command
3236 `secrets-show-secrets' offers a buffer with a visualization of the
3239 ** notifications.el provides an implementation of the Desktop
3240 Notifications API. It requires D-Bus for communication.
3242 ** soap-client.el supports access to SOAP web services from Emacs.
3243 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3245 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3247 ** New emacs-lock.el package.
3248 The previous version has been moved to obsolete/old-emacs-lock.el.
3249 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3250 against exiting Emacs and killing the buffer can be set separately.
3251 The mechanism for automatically turning off protection for buffers
3252 with dead inferior processes has been generalized.
3255 * Incompatible Lisp Changes in Emacs 24.1
3257 ** Passing a nil argument to a minor mode function call now ENABLES
3258 the minor mode unconditionally. This is so that you can write e.g.
3260 (add-hook 'text-mode-hook 'foo-mode)
3262 to enable foo-mode in Text mode buffers, removing the need for
3263 `turn-on-foo-mode' style functions. This affects all mode commands
3264 defined by `define-minor-mode'. If called interactively, the mode
3265 command still toggles the minor mode.
3267 ** The return value of `backup-buffer' has changed.
3268 It is now a list of three elements, where the second element is a list
3269 describing the original file's SELinux context. If Emacs or the
3270 system lacks SELinux support, the context list is (nil nil nil nil).
3271 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3273 ** `char-direction-table' and the `char-direction' function were deleted.
3274 They were buggy and inferior to the new support of bidirectional
3275 editing introduced in Emacs 24. If you need the bidirectional
3276 properties of a character, use `get-char-code-property' with the last
3277 argument `bidi-class'.
3279 ** `copy-directory' now copies the source directory as a subdirectory
3280 of the target directory, if the latter is an existing directory. The
3281 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3282 the contents directly into a pre-existing target directory.
3284 ** For mouse click input events in the text area, the Y pixel
3285 coordinate in the POSITION list now counts from the top of the text
3286 area, excluding any header line. Previously, it counted from the top
3289 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3290 been further reduced. Now a backquote not followed by a space is
3291 always treated as a "new-style" backquote. Please remove all
3292 "old-style" backquotes from your code. If your code uses backquotes
3293 as documented in the Elisp manual, and compiles without warning, then
3294 you have nothing to do in this regard. Code not following the
3295 appropriate conventions may fail to compile.
3297 The most common cause of trouble seems to be an old-style backquote
3298 followed by a newline. Another cause of trouble is vector notation
3299 for key sequence notation: instead of [(control ,)] and [(control ')],
3300 you should write [(control ?,)] and [(control ?')], which will work in
3303 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3304 was not advertised at the time. The function `custom-initialize-delay'
3305 replaced all known uses.
3307 ** `view-buffer' now treats special mode-class in the same way that
3308 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3309 major mode is special).
3311 ** Menu and tool bar changes
3313 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3314 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3315 With these alist entries omitted, `make-frame' checks the value of the
3316 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3317 a menu-bar or tool-bar, respectively. If the alist entries are added,
3318 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3320 *** The menu bar bindings's caches are not used any more.
3321 Use (where-is-internal <def> nil t) instead.
3323 ** Regions created by mouse dragging are now normal active regions,
3324 similar to those created by shift-selection (see Selection changes
3325 above). In previous Emacs versions, these regions were delineated by
3326 `mouse-drag-overlay'; that variable has been removed.
3328 ** The fourth argument of `filter-buffer-substring' has been removed.
3329 If you want to remove text properties from the final result, simply
3330 pass the result through substring-no-properties.
3332 ** cl.el no longer provides `cl-19'.
3334 ** The following obsolete functions and aliases have been removed
3335 (the appropriate new function is given in parentheses; "not needed"
3336 means you can just remove all calls to the function in question):
3338 *** `comint-kill-output' (`comint-delete-output')
3339 *** `decompose-composite-char' (`char-to-string')
3340 *** `outline-visible' (`outline-invisible-p')
3341 *** `internal-find-face' (`facep')
3342 *** `internal-get-face' (`facep and check-face')
3343 *** `frame-update-faces' (not needed)
3344 *** `frame-update-face-colors' (`frame-set-background-mode')
3345 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3346 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3347 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3348 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3349 *** `x-make-font-unbold' (`make-face-unbold')
3350 *** `x-make-font-unitalic' (`make-face-unitalic')
3351 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3352 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3353 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3354 *** `char-bytes' (== 1)
3355 *** `isearch-return-char' (`isearch-printing-char')
3356 *** `make-local-hook' (not needed)
3357 *** `set-screen-height' (`set-frame-height')
3358 *** `set-screen-width' (`set-frame-width')
3360 ** The following obsolete variables and varaliases have been removed
3361 (the appropriate new variable is given in parentheses):
3363 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3364 *** `vc-header-alist' (`vc-BACKEND-header')
3365 *** `directory-sep-char' (== ?/)
3366 *** `font-lock-defaults-alist' (`font-lock-defaults')
3367 *** `e' (`float-e').
3369 ** The following obsolete files were removed:
3370 sc.el, x-menu.el, rnews.el, rnewspost.el
3372 ** The format of the finder-inf.el file has changed, since the Finder
3373 mechanism is now based on the package system. The variable
3374 `finder-package-info' is replaced by `package--builtins' and
3375 `finder-keywords-hash'.
3377 ** When generating autoloads, `update-directory-autoloads' no longer
3378 assumes every inspected file is in your `load-path'. It instead
3379 generates relative names according to the current `load-path'.
3382 * Lisp Changes in Emacs 24.1
3384 ** Code can now use lexical scoping by default instead of dynamic scoping.
3385 The `lexical-binding' variable enables lexical scoping for local
3386 variables. It is typically set via a file-local variable in the first
3387 line of the file, in which case it applies to all the code in that
3390 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3391 binding instead of the old dynamic binding mode.
3393 *** Lexically scoped interpreted functions are represented with a new form
3394 of function value which looks like (closure ENV ARGS &rest BODY).
3396 *** New macro `letrec' to define recursive local functions.
3398 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3399 So do `defcustom' and other forms that call `defvar' as a subroutine.
3401 *** New function `special-variable-p' to check whether a variable is
3402 declared as dynamically bound.
3404 *** The form ((lambda ...) ...) is deprecated.
3406 ** An Emacs Lisp testing tool is now included.
3407 Emacs Lisp developers can use this tool to write automated tests for
3408 their code. See the ERT info manual for details.
3410 ** Changes for bidirectional display and editing
3412 *** New function `current-bidi-paragraph-direction'.
3413 This returns the base direction of the paragraph at point.
3415 *** New function `bidi-string-mark-left-to-right'.
3416 Given a string containing characters from right-to-left scripts, this
3417 function returns another string which can be safely inserted into a
3418 buffer, such that any following text will be always displayed to the
3419 right of that string. (This works by appending an invisible Unicode
3420 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3422 This is useful when the buffer has overall left-to-right paragraph
3423 direction and you need to insert a string whose contents are not known
3424 in advance, without disrupting the layout of the line.
3428 *** Window tree functions are accessible in Elisp.
3429 Functions are provided to return the parent, siblings or child windows
3430 of any window including internal windows (windows not associated with a
3431 buffer) in the window tree.
3433 **** New function `window-valid-p' gives non-nil for live and internal
3436 **** Window manipulation can deal with internal windows.
3437 Many window handling functions like `split-window', `delete-window', or
3438 `delete-other-windows' as well as the window resizing functions can now
3439 act on any window including internal ones.
3441 *** window-total-height/-width vs window-body-height/-width.
3442 The function `window-height' has been renamed to `window-total-height'
3443 and `window-width' has been renamed to `window-body-width'. The old
3444 names are provided as aliases. Two new functions `window-total-width'
3445 and `window-body-height' are provided.
3447 *** Window parameters specific to window handling functions.
3448 For each window you can specify a parameter to override the default
3449 behavior of a number of functions like `split-window', `delete-window'
3450 and `delete-other-windows'. The variable `ignore-window-parameters'
3451 allows to ignore processing such parameters.
3453 *** New semantics of third argument of `split-window'.
3454 The third argument of `split-window' has been renamed to SIDE and can be
3455 set to any of the values 'below, 'right, 'above, or 'left to make the
3456 new window appear on the corresponding side of the window that shall be
3457 split. Any other value of SIDE will cause `split-window' to split the
3458 window into two side-by-side windows as before.
3460 *** Window resizing functions.
3461 A new standard function for resizing windows called `window-resize' has
3462 been introduced. This and all other functions for resizing windows no
3463 longer delete any windows when they become too small.
3465 *** Deleting the selected window now selects the most recently selected
3466 live window on that frame instead.
3468 *** `adjust-window-trailing-edge' adjustments.
3469 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3470 is able to resize other windows if a window adjacent to the trailing
3471 edge cannot be shrunk any more. This makes its behavior more similar to
3472 that of Emacs 21 without compromising, however, its inability to delete
3473 windows which was introduced in Emacs 22.
3475 *** Window-local buffer lists.
3476 Windows now have local buffer lists. This means that removing a buffer
3477 from display in a window will preferably show the buffer previously
3478 shown in that window with its previous window-start and window-point
3479 positions. This also means that the same buffer may be automatically
3480 shown twice even if it already appears in another window.
3482 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3483 which if non-nil requires the buffer to be displayed in the currently
3484 selected window, signaling an error otherwise. If nil, another window
3485 can be used, e.g. if the selected one is strongly dedicated.
3487 *** `split-window-vertically' and `split-window-horizontally' renamed
3488 to `split-window-below' and `split-window-right' respectively.
3489 The old names are kept as aliases.
3493 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3494 named ACTION, and takes a display action of the same form as
3495 `display-buffer-base-action' (see Changes, above). A non-nil,
3496 non-list value is treated specially, as the old meaning.
3498 **** New variable `display-buffer-overriding-action'.
3500 **** The procedure of `display-buffer' etc. to choose a window is
3501 determined by combining `display-buffer-overriding-action',
3502 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3503 and `display-buffer-fallback-action'. The second and fourth of these
3504 are user-customizable variables.
3506 See the docstring of `display-buffer' for details.
3508 *** New functions `window-state-get' and `window-state-put'.
3509 These functions allow to save and restore the state of an arbitrary
3510 frame or window as an Elisp object.
3514 *** New variable `completion-extra-properties' used to specify extra
3515 properties of the current completion:
3516 - :annotate-function, same as the old completion-annotate-function.
3517 - :exit-function, function to call after completion took place.
3519 *** Functions on `completion-at-point-functions' can return any of the
3520 properties valid for `completion-extra-properties'.
3522 *** `completion-annotate-function' is obsolete.
3524 *** New `metadata' method for completion tables. The metadata thus returned
3525 can specify various details of the data returned by `all-completions':
3526 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3527 used to select a style in completion-category-overrides.
3528 - `annotation-function' to add annotations in *Completions*.
3529 - `display-sort-function' to specify how to sort entries in *Completions*.
3530 - `cycle-sort-function' to specify how to sort entries when cycling.
3532 *** `minibuffer-local-filename-must-match-map' is not used any more.
3533 Instead, the bindings in `minibuffer-local-filename-completion-map'
3534 are combined with `minibuffer-local-must-match-map'.
3536 *** New variable `completing-read-function' allows overriding the
3537 behavior of `completing-read'.
3539 ** `glyphless-char-display' can now distinguish between graphical and
3540 text terminal display, via a char-table entry that is a cons cell.
3542 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3543 Instead, the offending function is removed.
3547 *** New function `run-hook-wrapped' for running an abnormal hook by
3548 passing the hook functions as arguments to a "wrapping" function.
3549 Like `run-hook-with-args-until-success', it stops at the first
3550 non-nil return value.
3552 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3553 set of "wrapping" filters, similar to around advice.
3554 (A version of this macro was actually added in Emacs 23.2 but was not
3555 advertised at the time.)
3559 *** New macro `condition-case-unless-debug' (this was actually added in
3560 Emacs 23.1 as condition-case-no-debug, but not advertised)
3562 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3564 *** Variable `stack-trace-on-error' removed.
3566 *** The debugger can now "continue" from an error, which means it will
3567 jump to the error handler as if the debugger had not been invoked
3568 instead of jumping all the way to the top-level.
3570 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3571 This can be useful when `inhibit-quit' is set.
3573 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3574 named Emacs server instances.
3576 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3577 to redirect STDOUT to a file.
3579 ** The function `format-time-string' now supports the %N directive,
3580 for higher-resolution time stamps.
3582 ** New input reading functions
3584 *** New function `read-char-choice' reads a restricted set of
3585 characters, discarding any inputs not inside the set.
3587 *** The command `read-color' now requires a match for a color name
3588 or RGB triplet, instead of signaling an error if the user provides
3591 **** `facemenu-read-color' is now an alias for `read-color'.
3593 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3594 The variable is now used to load all kind of supported dynamic libraries,
3595 not just image libraries. The previous name is still available as an
3598 ** Syntax parsing changes
3600 *** New variable `syntax-propertize-function'.
3601 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3602 This allows syntax-table properties to be set independently from font-lock:
3603 just call syntax-propertize to make sure the text is propertized.
3604 Together with this new variable come a new hook
3605 syntax-propertize-extend-region-functions, as well as two helper functions:
3606 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3607 as-is; and syntax-propertize-rules which provides a new way to specify
3610 *** Syntax tables support a new "comment style c" additionally to style b.
3612 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3614 ** frame-local variables cannot be let-bound any more.
3616 ** Major and minor mode changes
3618 *** `set-auto-mode' now respects mode: local variables at the end of files,
3619 as well as those in the -*- line.
3621 *** `prog-mode' is a new major mode from which programming modes
3624 **** `prog-mode-hook' can be used to enable features for programming
3625 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3626 on-the-fly spell checking for comments and strings.
3628 *** New hook `change-major-mode-after-body-hook', run by
3629 `run-mode-hooks' just before any other mode hooks.
3631 *** Enabled globalized minor modes can be disabled in specific major modes.
3632 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3633 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3635 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3637 ** File-handling changes
3639 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3640 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3641 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3642 argument is supplied (see Trash changes, above).
3644 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3646 ** Tool-bars can display separators.
3647 Tool-bar separators are handled like menu separators in menu-bar maps,
3648 i.e. via menu entries of the form `(menu-item "--")'.
3652 *** Animated images support (currently animated gifs only).
3654 **** `image-animated-p' returns non-nil if an image can be animated.
3656 **** `image-animate' animates a supplied image spec.
3658 **** `image-animate-timer' returns the timer object for an image that
3661 *** `image-extension-data' has been renamed to `image-metadata'.
3662 The old name is an obsolete alias to the new one.
3664 *** Image mode can view any image type that ImageMagick supports.
3665 This requires Emacs to be built with ImageMagick support.
3667 **** New function `imagemagick-types', defined if ImageMagick support
3668 is enabled, returns a list of image file extensions that your
3669 ImageMagick installation supports.
3671 **** New function `imagemagick-register-types' enables ImageMagick
3672 image types in Image mode and in `create-image' and other helper
3675 **** New option `imagemagick-types-inhibit' excludes certain
3676 ImageMagick image types from `imagemagick-register-types'.
3678 **** With ImageMagick support, there are extra Image mode commands to
3679 resize and rotate images: `image-transform-fit-to-height',
3680 `image-transform-fit-to-width', `image-transform-set-rotation', and
3681 `image-transform-set-scale'.
3683 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3684 passes it to the mail user agent function. This argument specifies an
3685 action for returning to the caller after finishing with the mail. For
3686 example, this is used by Rmail to optionally delete a mail window.
3688 ** XML and HTML parsing
3689 If Emacs is compiled with libxml2 support, there are two new
3690 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3691 and `libxml-parse-xml-region' (which parses XML). Both return an
3692 Emacs Lisp parse tree.
3694 ** Networking and encryption changes
3696 *** `open-network-stream' can now be used to open an encrypted stream.
3697 It now accepts an optional `:type' parameter for initiating a TLS
3698 connection, directly or via STARTTLS. To do STARTTLS, additional
3699 parameters (`:end-of-command', `:success', `:capabilities-command')
3700 must also be supplied.
3702 *** New library gnutls.el.
3703 The new function `gnutls-available-p' returns non-nil if Emacs is
3704 built with GnuTLS support. The main entry points are
3705 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3706 these functions through `open-network-stream', because that can
3707 upgrade connections through STARTTLS opportunistically or use plain
3708 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3711 *** New primitive `secure-hash' that supports many secure hash algorithms:
3712 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3713 sha1.el has been removed. The `sha1' feature is provided by default.
3717 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3719 ** Progress reporters can now "spin".
3720 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3721 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3722 time you call `progress-reporter-update' on that progress reporter,
3723 with a nil or omitted VALUE argument, the reporter message is
3724 displayed with a "spinning bar".
3726 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3727 being reverted, even if the buffer has a local `revert-buffer-function'.
3729 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3730 If delayed-warnings-list is non-nil, the command loop calls
3731 `delayed-warnings-hook' after `post-command-hook'. At present, this
3732 is only used by Emacs on some platforms to display warnings during
3733 startup, which might otherwise not be noticed. This uses the
3734 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3736 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3738 ** New function `make-composed-keymap' that constructs a new keymap
3739 from multiple input maps. You can use this to make a keymap that
3740 inherits from multiple maps, eg:
3741 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3743 ** New function `string-prefix-p'.
3744 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3746 ** New reader macro ## that stands for the empty symbol.
3747 This means that the empty symbol can now be read back. Also, #: by itself
3748 (when not immediately followed by a possible symbol character) stands for
3749 an empty uninterned symbol.
3751 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3753 ** The following functions and variables are obsolete:
3755 *** `tooltip-use-echo-area' is obsolete.
3756 Rather than setting this to t, disable Tooltip mode instead.
3758 *** buffer-substring-filters is obsolete.
3759 Use `filter-buffer-substring-functions' instead.
3761 *** `byte-compile-disable-print-circle' is obsolete.
3763 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3764 Use `post-command-hook' instead.
3766 *** `font-lock-maximum-size' is obsolete.
3769 * Changes in Emacs 24.1 on Non-Free Operating Systems
3771 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3772 and also when HOME is set to C:\ by default.
3774 ** New configure.bat options
3776 *** --enable-checking builds Emacs with extra runtime checks.
3778 *** --distfiles specifies files to be included in binary distribution.
3780 *** --without-gnutls disables automatic GnuTLS detection.
3782 *** --lib for general library linkage, works with the USER_LIBS build variable.
3784 ** New make target `dist' to create binary distribution for MS Windows.
3786 ** The Lisp function `w32-default-color-map' is now obsolete.
3787 (It is only used internally in the Emacs C code.)
3789 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3790 reappear on mouse-over. (Requires OS X 10.6 or later.)
3792 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3793 other platforms, rather than inserting its contents into the buffer.
3796 ----------------------------------------------------------------------
3797 This file is part of GNU Emacs.
3799 GNU Emacs is free software: you can redistribute it and/or modify
3800 it under the terms of the GNU General Public License as published by
3801 the Free Software Foundation, either version 3 of the License, or
3802 (at your option) any later version.
3804 GNU Emacs is distributed in the hope that it will be useful,
3805 but WITHOUT ANY WARRANTY; without even the implied warranty of
3806 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3807 GNU General Public License for more details.
3809 You should have received a copy of the GNU General Public License
3810 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3815 paragraph-separate: "[
\f]*$"