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.
868 *** terminal.el is obsolete; use term.el instead.
870 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
873 *** xesam.el is obsolete, because the XESAM project has been canceled.
876 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
879 *** The Info-edit command is obsolete. Editing Info nodes by hand
880 has not been relevant for some time.
883 * New Modes and Packages in Emacs 24.4
886 ** New package `eww' is a built-in web browser.
887 It is only available if Emacs is compiled with libxml2 support.
889 ** New minor mode `superword-mode'.
890 This overrides the default word motion commands to treat "symbol_words"
891 as a single word, similar to what `subword-mode' does.
894 ** New package nadvice.el offers lighter-weight advice facilities.
897 *** add-function/remove-function, which can be used to add/remove code on any
898 function-carrying place, such as process-filters or `<foo>-function' hooks.
900 *** advice-add/advice-remove to add/remove a piece of advice on a named
901 function,much like `defadvice' does.
903 ** New package frameset.el.
904 It provides a set of operations to save a frameset (the state of all
905 or a subset of the existing frames and windows, somewhat similar to a
906 frame configuration), both in-session and persistently, and restore it
907 at some point in the future.
910 ** New package filenotify.el provides an interface for file system
911 notifications. It requires that Emacs be compiled with one of the
912 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
915 * Incompatible Lisp Changes in Emacs 24.4
918 ** `kill-region' has lost its `yank-handler' optional argument.
921 ** `(input-pending-p)' no longer runs other timers that are ready to run.
922 The new optional CHECK-TIMERS parameter allows for the prior behavior.
925 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
928 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
929 Some languages match those as »...«, and others as «...», so it is
930 better for Emacs to stay neutral by default.
933 ** In compiled Lisp files, the header no longer includes a timestamp.
936 ** The default file coding for Emacs Lisp files is now utf-8.
937 (See `file-coding-system-alist'.) In most cases, this change is
938 transparent, but files that contain unusual characters without
939 specifying an explicit coding system may fail to load with obscure
940 errors. You should either convert them to utf-8 or add an explicit
944 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
945 It used to disable the minor mode, major mode, and text-property keymaps,
946 whereas now it simply has higher precedence.
948 ** Default process filters and sentinels are not nil any more.
949 Instead they default to a function that does what the nil value used to do.
952 ** `read-event' does not return decoded chars in ttys any more.
953 As was the case in Emacs 22 and before, the decoding of terminal
954 input, according to `keyboard-coding-system', is not performed in
955 `read-event' any more. But unlike in Emacs 22, this decoding is still
956 done before input-decode-map, function-key-map, etc.
959 ** The option `inhibit-local-menu-bar-menus' has been removed.
962 ** Frame-local variables that affect redisplay do not work any more.
963 More specifically, redisplay does not bother to check for a frame-local
964 value when looking up variables.
967 ** nil and "unbound" are indistinguishable in `symbol-function'.
968 `symbol-function' does not signal a `void-function' error any more.
969 To determine if a symbol's function definition is void, use `fboundp'.
972 ** `defadvice' does not honor the `freeze' flag and cannot advise
973 special-forms any more.
976 ** `dolist' no longer binds VAR while evaluating the RESULT form,
977 when lexical binding is enabled. Previously, VAR was bound to nil,
978 which often led to spurious unused-variable warnings.
981 ** The return value of `backup-buffer' has changed.
982 The second argument is no longer an SELinux context, instead it is an
983 alist of extended attributes as returned by the new function
984 `file-extended-attributes'. The attributes can be applied to another
985 file using `set-file-extended-attributes'.
988 ** By default `copy-file' no longer copies file permission bits to an
989 existing destination; and it sets the file permission bits of a newly
990 created destination to those of the source, masked by the default file
991 permissions. To copy the file permission bits, pass t as the
992 PRESERVE-PERMISSIONS argument of `copy-file'.
995 ** `visited-file-modtime' now returns -1 for nonexistent files.
996 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
997 in the presence of files with negative time stamps.
1000 ** The cars of the elements in `interpreter-mode-alist' are now
1001 treated as regexps rather than literal strings.
1004 * Lisp Changes in Emacs 24.4
1007 ** The second argument of `eval' can now specify a lexical environment.
1010 ** New functions `special-form-p' and `macrop'.
1012 ** New macro `define-alternatives' can be used to define generic commands.
1013 Generic commands are interactive functions whose implementation can be
1014 selected among several alternatives, as a matter of user preference.
1016 ** The `defalias-fset-function' property lets you catch `defalias'
1017 calls, and redirect them to your own function, instead of `fset'.
1020 ** New variable `enable-dir-local-variables'.
1021 Directory-local variables are ignored if this is nil. This may be
1022 useful for modes that want to ignore directory-locals while still
1023 respecting file-local variables.
1026 ** New function `get-pos-property'.
1028 ** Completion changes
1030 *** The separator for `completing-read-multiple' can now be a regexp.
1031 The default separator has been changed to allow surrounding spaces
1034 *** The `common-substring' arg of `display-completion-list' is obsolete.
1035 Either use `completion-all-completions', which returns highlighted
1036 strings (including for partial or substring completion), or call
1037 `completion-hilit-commonality' to add the highlight.
1039 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1040 let you enable symbol prettification (replacing a string like "lambda" with
1041 the Greek lambda character).
1046 *** Functions to pop up menus and dialogs now work on all terminals,
1047 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1048 `message-box', `yes-or-no-p', etc.
1050 The function `display-popup-menus-p' will now return non-nil for a
1051 display or frame whenever a mouse is supported on that display or
1054 *** New hook `tty-setup-hook'.
1058 *** New display action function `display-buffer-no-window' to not
1059 display the buffer in a window.
1061 *** New display action alist entry `allow-no-window' to indicate the
1062 caller of `display-buffer' is ready to handle the case of not
1063 displaying the buffer in a window.
1065 ** New hook `pre-redisplay-function'.
1068 ** New bool-vector set operation functions:
1069 *** `bool-vector-exclusive-or'
1070 *** `bool-vector-union'
1071 *** `bool-vector-intersection'
1072 *** `bool-vector-set-difference'
1073 *** `bool-vector-not'
1074 *** `bool-vector-subsetp'
1075 *** `bool-vector-count-consecutive'
1076 *** `bool-vector-count-population'
1079 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1081 ** Error-handling changes
1084 *** New function `define-error'.
1087 *** `with-demoted-errors' takes an additional argument `format'.
1090 ** New macro `with-eval-after-load'.
1091 This is like the old `eval-after-load', but better behaved.
1094 ** New library subr-x.el with miscellaneous small utility functions
1095 *** `hash-table-keys'
1096 *** `hash-table-values'
1097 *** `string-blank-p`
1098 *** `string-empty-p`
1100 *** `string-reverse`
1101 *** `string-trim-left'
1102 *** `string-trim-right'
1104 *** `string-remove-prefix'
1105 *** `string-remove-suffix'
1108 ** Obsoleted functions:
1111 *** `lisp-complete-symbol'
1112 *** `field-complete'
1113 *** `minibuffer-completion-contents'
1114 *** `isearch-nonincremental-exit-minibuffer'
1115 *** `isearch-filter-visible'
1116 *** `generic-make-keywords-list'
1117 *** `get-upcase-table' (use `case-table-get-table' instead).
1119 ** `with-wrapper-hook' is obsoleted by `add-function'.
1120 The few hooks that used with-wrapper-hook are replaced as follows:
1121 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1122 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1123 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1126 ** `byte-compile-interactive-only-functions' is now obsolete.
1127 To specify that a command should only be called interactively, give it
1128 a non-nil `interactive-only' property.
1131 ** `split-string' now takes an optional argument TRIM.
1132 The value, if non-nil, is a regexp that specifies what to trim from
1133 the start and end of each substring.
1136 ** New function `string-suffix-p'.
1138 ** File-handling changes
1141 *** Support for filesystem notifications.
1142 Emacs now supports notifications of filesystem changes, such as
1143 creation, modification, and deletion of files. This requires the
1144 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1145 MS-Windows systems, this is supported for Windows XP and newer
1149 *** The 9th element returned by `file-attributes' is now unspecified.
1150 Formerly, it was t if the file's gid would change if file were deleted
1151 and recreated. This value has been inaccurate for years on many
1152 platforms, and nobody seems to have noticed or cared.
1155 *** The 6th argument to `copy-file' has been renamed to
1156 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1157 Unix file permission bits as well as SELinux context.
1160 *** The function `file-ownership-preserved-p' now has an optional
1161 argument GROUP which causes it check for file group too. This can be
1162 used in place of the 9th element of `file-attributes'.
1165 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1166 argument, with the same interpretation as the returned value of
1167 `visited-file-modtime'.
1169 ** Autorevert changes
1172 *** If Emacs is compiled with file notification support, notifications
1173 are used instead of checking the time stamp of the files. You can
1174 disable this by setting the user option `auto-revert-use-notify' to
1175 nil. Alternatively, a regular expression of directories to be
1176 excluded from file notifications can be specified by
1177 `auto-revert-notify-exclude-dir-regexp'.
1180 *** The new user option `auto-revert-remote-files' enables reversion
1181 of remote files when set to non-nil.
1185 *** The function `face-spec-set' is now like `setq' for face specs.
1186 Its third arg now accepts values specifying a face spec type (defface,
1187 custom, or override spec), and the relevant spec is set accordingly.
1190 *** New function `add-face-text-property', which can be used to
1191 conveniently prepend/append new face properties.
1193 *** Face specs set via Custom themes now replace the `defface' spec
1194 rather than inheriting from it (as do face specs set via Customize).
1196 *** New face characteristic (supports :underline (:style wave))
1197 specifies whether or not the terminal can display a wavy line.
1200 *** New face spec attribute :distant-foreground
1201 specifies foreground to use if background color is near the foreground
1202 color that would otherwise have been used.
1207 *** `image-animated-p' is now `image-multi-frame-p'.
1208 It returns non-nil for any image that contains multiple frames,
1209 whether or not it specifies a frame delay.
1212 *** New variable `image-default-frame-delay' gives the frame delay for
1213 animated images which do not specify a frame delay.
1216 *** New functions `image-current-frame' and `image-show-frame' for getting
1217 and setting the current frame of a multi-frame image.
1222 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1223 **** object-name -> eieio-object-name
1224 **** object-class -> eieio-object-class
1225 **** object-class-fast -> eieio--object-class
1226 **** object-class-name -> eieio-object-class-name
1227 **** object-name-string -> eieio-object-name-string
1228 **** object-num-slots -> eieio--object-num-slots
1229 **** object-set-name-string -> eieio-object-set-name-string
1230 **** class-of -> eieio-object-class
1231 **** class-name -> eieio-class-name
1232 **** class-parent -> eieio-class-parent
1233 **** class-parents -> eieio-class-parents
1234 **** class-parents-fast -> eieio-class-parents-fast
1235 **** class-children -> eieio-class-children
1236 **** class-num-slots -> eieio--class-num-slots
1237 **** class-precedence-list -> eieio-class-precedence-list
1238 **** class-direct-subclasses -> eieio-class-children
1239 **** class-direct-superclasses -> eieio-class-parents
1241 ** Changes in encoding and decoding of text
1244 *** New coding-system `prefer-utf-8'.
1245 This is like `undecided' but prefers UTF-8 on decoding if the text to
1246 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1247 any non-ASCII characters are automatically encoded as UTF-8.
1250 *** New attributes of coding-systems whose type is `undecided'.
1251 Two new attributes, `:inhibit-null-byte-detection' and
1252 `:inhibit-iso-escape-detection', determine how to detect encoding of
1253 text that includes null bytes and ISO-2022 escape sequences,
1254 respectively. Each of these attributes can be either nil, zero, or
1255 t. If it is t, decoding text ignores null bytes and, respectively,
1256 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1257 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1258 text is encoded in one of the ISO-2022 encodings, such as
1259 iso-2022-7bit. If the value is zero, Emacs consults the variables
1260 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1262 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1263 UTF-8 encoding and decoding, whenever possible.
1265 These attributes are only meaningful for coding-systems of type
1266 `undecided'. (The type of a coding-system is determined by its
1267 `:coding-type' attribute and can be accessed by calling the
1268 `coding-system-type' function.)
1271 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1274 ** New functions `group-gid' and `group-real-gid'.
1277 ** The spelling of the rx.el category `chinese-two-byte' has been
1278 corrected (the first 'e' was missing).
1281 ** Minor internal changes to the details of lock files.
1282 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1283 If DIR/.#FILE already exists and is not an Emacs lock file,
1284 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1285 numbered lock files DIR/.#FILE.0...).
1286 On file systems that do not support symbolic links, the lock is now a
1287 regular file with contents being what would have been in the symlink.
1289 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1292 *** The package descriptor and name of global variables, constants,
1293 and functions should be separated by two hyphens if the symbol is not
1294 meant to be used by other packages.
1297 * Changes in Emacs 24.4 on Non-Free Operating Systems
1300 ** The procedure for building Emacs on MS-Windows has changed.
1301 It is now built by running the same configure script as on all other
1302 platforms. This requires the MSYS environment and MinGW development
1303 tools. See the updated instructions in nt/INSTALL for details.
1305 Using the Posix configure script and Makefile's also means a change in
1306 the directory structure of the Emacs installation on Windows. It is
1307 now the same as on GNU and Unix systems. In particular, the auxiliary
1308 programs, such as cmdproxy.exe and hexl.exe, are in
1309 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1310 version), version-independent site-lisp is in share/emacs/site-lisp,
1311 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1312 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1313 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1314 directories and will find the files in there automatically; there's no
1315 need to set any variables due to this change.)
1318 ** Emacs on Windows 2000 and later can now access files and directories
1319 whose names cannot be encoded in the current system codepage.
1321 The new variable `w32-unicode-filenames' controls this feature: if it
1322 is t, Emacs uses Unicode APIs to pass file names to system calls,
1323 which lifts the limitation of file names to the current locale.
1326 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1327 The backtrace is written to the 'emacs_backtrace.txt' file in the
1328 directory where Emacs was running.
1331 ** The variable `buffer-file-type' is no longer supported.
1332 Setting it has no effect, and %t in the mode-line format is ignored.
1333 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1334 modifying it has no effect.
1337 ** Lock files now work on MS-Windows.
1338 This helps to prevent losing your edits if the same file is being
1339 edited in another Emacs session or by another user. See the node
1340 "Interlocking" in the Emacs User Manual for the details. To disable
1341 file locking, customize `create-lockfiles' to nil.
1343 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1344 GNUstep and Mac OS X 10.4 use the old font backend.
1345 To use the old backend by default, do on the command line:
1346 % defaults write org.gnu.Emacs FontBackend ns
1348 ** Improved fullscreen support on Mac OS X.
1349 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1350 Customize `ns-use-native-fullscreen' to change the style.
1351 For Mac OS X 10.7 and newer, native is the default.
1353 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1354 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1355 does not apply to images.
1358 * Installation Changes in Emacs 24.3
1360 ** The default X toolkit is now Gtk+ version 3.
1361 If you don't pass `--with-x-toolkit' to configure, or if you use
1362 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1363 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1364 You can explicitly require a specific version by passing
1365 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1367 ** New configure option `--enable-link-time-optimization', to utilize
1368 an appropriate feature provided by GCC since version 4.5.0.
1370 ** New configure option `--without-all' to disable most of the optional
1371 features (image support, etc.) that are normally enabled by default.
1373 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1374 Emacs). If building with GCC, this enables compile-time checks that
1375 warn/give errors about possibly-questionable C code. On a recent GNU
1376 system there should be no warnings; on older and on non-GNU systems
1377 the results may be useful to developers.
1379 ** The configure option `--enable-use-lisp-union-type' has been
1380 renamed to `--enable-check-lisp-object-type', as the resulting
1381 Lisp_Object type no longer uses a union to implement the compile time
1382 check that this option enables.
1384 ** The configure option `--disable-maintainer-mode' has been removed,
1385 as it was confusingly-named and rarely useful.
1387 ** The configure options `--program-prefix', `--program-suffix', and
1388 `--program-transform-name' apply to more than just the installed
1389 binaries. Now they also affect the man pages, icons, and the
1390 etc/emacs.desktop file; but not the info pages, since this would break
1391 links between the various manuals.
1393 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1394 overwriting "emacs" in the installation bin/ directory with a link
1397 ** Emacs uses libtinfo in preference to libncurses, if available.
1399 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1400 /usr/pkg/lib to the linker search path. You must add them yourself if
1403 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1404 (from the bin and libexec directories, respectively). The former is
1405 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1408 * Startup Changes in Emacs 24.3
1410 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1411 lisp/ directory. There should not be any there anyway. If you have
1412 been adding them there, put them somewhere else; e.g., site-lisp.
1414 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1417 * Changes in Emacs 24.3
1421 *** `C-h f' (`describe-function') can now perform autoloading.
1422 When this command is called for an autoloaded function whose docstring
1423 contains a key substitution construct, that function's library is
1424 automatically loaded, so that the documentation can be shown
1425 correctly. To disable this, set `help-enable-auto-load' to nil.
1427 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1428 even after their associated libraries have been loaded (and the
1429 autoloads have been redefined as functions).
1433 *** Images displayed via ImageMagick now support transparency and the
1434 :background image specification property.
1436 *** When available, ImageMagick support is automatically enabled.
1437 It is no longer necessary to call `imagemagick-register-types'
1438 explicitly to install ImageMagick image types; that function is called
1439 automatically at startup, or when customizing an imagemagick- option.
1441 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1442 ImageMagick to view images. (You must call `imagemagick-register-types'
1443 afterwards if you do not use customize to change this.)
1445 *** The new variable `imagemagick-enabled-types' also affects which
1446 ImageMagick types are treated as images. The function
1447 `imagemagick-filter-types' returns the list of types that will be
1452 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1453 next and previous path separator, respectively.
1455 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1456 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1457 non-nil before enabling the mode.
1461 *** New option `mode-line-default-help-echo' specifies the help text
1462 (shown in a tooltip or in the echo area) for any part of the mode line
1463 that does not have its own specialized help text.
1465 *** You can now click mouse-3 in the coding system indicator to invoke
1466 `set-buffer-file-coding-system'.
1468 ** Server and client
1470 *** emacsclient now obeys string values for `initial-buffer-choice',
1471 if it is told to open a new frame without specifying any file to visit
1472 or expression to evaluate.
1474 *** New option `server-auth-key' specifies a shared server key.
1476 ** Emacs now generates backtraces on fatal errors.
1477 On encountering a fatal error, Emacs now outputs a textual description
1478 of the fatal signal, and a short backtrace on platforms like glibc
1479 that support backtraces.
1481 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1482 This minor mode replaces `toggle-read-only', which is now obsolete.
1484 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1485 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1486 respectively, without exiting from the prompt.
1488 ** In the Package Menu, newly-available packages are listed as "new",
1489 and sorted above the other "available" packages by default.
1491 ** If your Emacs was built from a repository checkout, the new variable
1492 `emacs-bzr-version' contains information about the bzr revision used.
1494 ** New option `create-lockfiles' specifies usage of lockfiles.
1495 It defaults to t. Changing it to nil inhibits the creation of lock
1496 files (use this with caution).
1498 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1499 variables on remote hosts.
1501 ** The entry for PCL-CVS has been removed from the Tools menu.
1502 The PCL-CVS commands are still available via the keyboard.
1504 ** Using "unibyte: t" in Lisp source files is obsolete.
1505 Use "coding: raw-text" instead.
1507 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1508 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1509 The previous binding, introduced in Emacs 24.1, was a mistake, because
1510 `C-c LETTER' bindings are reserved for user customizations.
1512 ** Internationalization
1514 *** New language environment: Persian.
1516 *** New input method `vietnamese-vni'.
1518 ** Nextstep (GNUstep / Mac OS X) port
1520 *** Support for fullscreen and the frame parameter fullscreen.
1522 *** A file dialog is used for open/save operations initiated from the
1526 * Editing Changes in Emacs 24.3
1528 ** Search and Replace
1530 *** Non-regexp Isearch now performs "lax" space matching.
1531 Each sequence of spaces in the supplied search string may match any
1532 sequence of one or more whitespace characters, as specified by the
1533 variable `search-whitespace-regexp'. (This variable is also used by a
1534 similar existing feature for regexp Isearch.)
1536 *** New Isearch command `M-s SPC' toggles lax space matching.
1537 This applies to both ordinary and regexp Isearch.
1539 *** New option `replace-lax-whitespace'.
1540 If non-nil, `query-replace' uses flexible whitespace matching too.
1543 *** Global `M-s _' starts a symbol (identifier) incremental search,
1544 and `M-s _' in Isearch toggles symbol search mode.
1545 `M-s c' in Isearch toggles search case-sensitivity.
1547 ** Navigation commands
1549 *** New binding `M-g c' for `goto-char'.
1551 *** New binding `M-g TAB' for `move-to-column'.
1553 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1554 interactively with no prefix arg. Previously, it moved to column 1.
1556 ** New option `yank-handled-properties' allows processing of text
1557 properties on yanked text, in ways that are more general than just
1558 removing them (as is done by `yank-excluded-properties').
1560 ** New option `delete-trailing-lines' specifies whether
1561 M-x delete-trailing-whitespace should delete trailing lines at the end
1562 of the buffer. It defaults to t.
1564 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1566 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1567 `ucs-insert' is now an obsolete alias for `insert-char'.
1569 ** The `z' key no longer has a binding in most special modes.
1570 It used to be bound to `kill-this-buffer', but `z' is too easy to
1573 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1574 It copies the region-rectangle as the last rectangle kill.
1578 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1580 *** New option `register-separator' specifies the register containing
1581 the text to put between collected texts for use with
1582 M-x append-to-register and M-x prepend-to-register.
1585 * Changes in Specialized Modes and Packages in Emacs 24.3
1587 ** Common Lisp emulation (CL)
1589 *** CL's main entry is now (require 'cl-lib).
1590 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1591 i.e., all its definitions have the "cl-" prefix (and internal definitions
1592 use the "cl--" prefix).
1594 If `cl' provided a feature under the name `foo', then `cl-lib'
1595 provides it under the name `cl-foo' instead; with the exceptions of the
1596 few `cl' definitions that had to use `foo*' to avoid conflicts with
1597 pre-existing Elisp entities. These have been renamed to `cl-foo'
1598 rather than `cl-foo*'.
1600 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1601 provide the old, non-prefixed names. Some exceptions are listed below:
1603 *** `cl-flet' is not like `flet' (which is deprecated).
1604 Instead it obeys the behavior of Common-Lisp's `flet'.
1605 In particular, in cl-flet function definitions are lexically scoped,
1606 whereas in flet the scoping is dynamic.
1608 *** `cl-labels' is slightly different from `labels'.
1609 The difference is that it relies on the `lexical-binding' machinery
1610 (as opposed to the `lexical-let' machinery used previously) to capture
1611 definitions in closures, so such closures will only work if `lexical-binding'
1614 *** `cl-letf' is not exactly like `letf'.
1615 The only difference is in details that relate to some deprecated usage
1616 of `symbol-function' in place forms.
1618 *** `progv' was rewritten to use the `let' machinery.
1619 A side effect is that variables without corresponding values are bound
1620 to nil rather than being made unbound.
1622 *** The following methods of extending `setf' are obsolete
1623 (use features from gv.el instead):
1624 `define-modify-macro' (use `gv-letplace')
1625 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1626 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1627 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1631 *** Changes are now highlighted using the same color scheme as in
1632 modern VCSes. Deletions are displayed in red (new faces
1633 `diff-refine-removed' and `smerge-refined-removed', and new definition
1634 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1635 and `smerge-refined-added', and new definition of `diff-added').
1637 *** The variable `diff-use-changed-face' defines whether to use the
1638 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1639 changes in context diffs.
1641 *** The new command `diff-delete-trailing-whitespace' removes trailing
1642 whitespace introduced by a diff.
1644 ** Ediff now uses the same color scheme as Diff mode.
1648 A new version of python.el, which provides several new features, including:
1649 per-buffer shells, better indentation, Python 3 support, and improved
1650 shell-interaction compatible with iPython (and virtually any other
1653 *** Some user options have been replaced/renamed, including (old -> new):
1654 **** python-indent -> python-indent-offset
1655 **** python-guess-indent -> python-indent-guess-indent-offset
1656 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1657 **** python-use-skeletons -> python-skeleton-autoinsert
1659 *** Some user options have been removed, including:
1661 **** `python-indent-string-contents': Strings are never indented.
1663 **** `python-honour-comment-indentation':
1664 Comments are always considered as indentation markers.
1666 **** `python-continuation-offset': Indentation is automatically
1667 calculated in a pep8 compliant way depending on the context.
1669 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1670 Have no direct mapping as the shell interaction is completely different.
1672 **** `python-python-command', `python-jython-command':
1673 Replaced by `python-shell-interpreter'.
1675 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1676 `python-pdbtrack-minor-mode-string', `python-source-modes':
1679 *** Some commands have been replaced (old -> new):
1680 **** python-insert-class -> python-skeleton-class
1681 **** python-insert-def -> python-skeleton-def
1682 **** python-insert-for -> python-skeleton-for
1683 **** python-insert-if -> python-skeleton-if
1684 **** python-insert-try/except -> python-skeleton-try
1685 **** python-insert-try/finally -> python-skeleton-try
1686 **** python-insert-while -> python-skeleton-while
1687 **** python-find-function -> python-nav-jump-to-defun
1688 **** python-next-statement -> python-nav-forward-sentence
1689 **** python-previous-statement -> python-nav-backward-sentence
1690 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1691 **** python-end-of-defun-function -> python-nav-end-of-defun
1692 **** python-send-buffer -> python-shell-send-buffer
1693 **** python-send-defun -> python-shell-send-defun
1694 **** python-send-region -> python-shell-send-region
1695 **** python-send-region-and-go -> emulate with python-shell-send-region
1696 and python-shell-switch-to-shell
1697 **** python-send-string -> python-shell-send-string
1698 **** python-switch-to-python -> python-shell-switch-to-shell
1699 **** python-describe-symbol -> python-eldoc-at-point
1703 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1705 *** The D-Bus object manager interface is implemented.
1707 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1708 if their value does not fit into Emacs's integer range.
1710 *** The function `dbus-call-method' is now non-blocking.
1711 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1713 *** Signals can also be sent as unicast messages.
1715 *** The argument list of `dbus-register-signal' has been extended,
1716 according to the new match rule types of D-Bus.
1718 *** `dbus-init-bus' supports private connections.
1720 *** There is a new function `dbus-setenv'.
1722 ** `desktop-path' no longer includes the "." directory.
1723 Desktop files are now located in ~/.emacs.d by default.
1727 *** `dired-do-async-shell-command' executes each file sequentially
1728 if the command ends in `;' (when operating on multiple files).
1729 Otherwise, it executes the command on each file in parallel.
1731 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1732 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1735 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1736 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1737 mark/unmark/flag all files in the active region.
1739 *** The minibuffer default for `=' (`dired-diff') has changed.
1740 It is now the backup file for the file at point, if one exists.
1741 In Transient Mark mode the default is the file at the active mark.
1743 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1744 The global binding for `M-=', `count-words-region' is in effect.
1748 *** New module "notifications", which can send a notification when you
1749 receive a private message or your nickname is mentioned.
1751 *** ERC will look up server/channel names via auth-source and use any
1754 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1755 only applies to messages sent by lurkers.
1757 ** reStructuredText mode
1759 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1760 fontification, comment handling, and customization have all been revised
1763 *** Support for `imenu' and `which-function-mode'.
1765 *** The reStructuredText syntax is more closely covered.
1766 Sphinx support has been improved.
1768 *** `rst-insert-list' inserts new list or continues existing lists.
1770 *** A negative prefix argument always works for `rst-adjust'.
1772 *** The window configuration is reset after displaying a TOC.
1774 *** The constant `rst-version' describes the rst.el package version.
1778 *** Support for percent literals and recognition of regular expressions
1779 in method calls without parentheses with more methods, including Cucumber
1782 *** Improved syntax highlighting and indentation.
1784 *** New command `ruby-toggle-block', bound to `C-c {'.
1786 *** Some non-standard keybindings/commands have been removed:
1788 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1790 **** `ruby-mark-defun'; use `mark-defun'.
1792 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1793 appropriate settings for the variables `beginning-of-defun-function'
1794 and `end-of-defun-function'.
1796 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1797 `reindent-then-newline-and-indent' and `newline' have been removed.
1799 ** Shell Script mode
1801 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1803 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1805 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1809 *** The free software compiler GHDL is supported (and now the default).
1811 *** Support for the VHDL-AMS packages has been added/updated.
1813 *** Updated to the 2002 revision of the VHDL standard.
1815 *** Accepts \r and \f as whitespace.
1819 *** The faces used by Apropos are now directly customizable.
1820 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1821 see the `apropos' Custom group for details.
1823 *** The old options whose values specified faces to use have been removed
1824 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1828 *** This package has been rewritten to use Tabulated List mode.
1830 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1831 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1835 *** Algebraic simplification mode is now the default.
1836 To restrict to the limited simplifications given by the former
1837 default simplification mode, use `m I'.
1841 *** You can customize the header text that appears above each calendar month.
1842 See the variable `calendar-month-header'.
1844 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1846 *** The calendars produced by cal-html include holidays.
1847 Customize `cal-html-holidays' to change this.
1851 *** The major modes from the parser generators "Bovine" and "Wisent"
1852 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1853 are in `auto-mode-alist', and the corresponding manuals are included.
1857 **** Menu support for the "Configuration" feature. This allows users to
1858 choose the active configuration (such as debug or install) from the menu.
1860 **** New command `ede-set' to interactively set project-local variables.
1862 **** Support for compiling, debugging, and running in "generic" projects.
1864 **** Autoconf editing support for M4 macros with complex arguments.
1866 **** Compilation support for the "linux" project type.
1868 **** "simple" projects have been removed; use "generic" projects instead.
1872 **** Support for parsing #include statements inside a namespace in C/C++.
1874 **** Improved support for 'extern "C"' declarations in C/C++.
1876 **** The ability to ignore more common special C/C++ preprocessor symbols,
1877 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1878 If available, include cdefs.h as an additional source of preprocessor symbols.
1880 **** Improved C/C++ function pointer parsing.
1882 **** In Python, support for converting imports to include file names.
1884 **** Ability to dynamically determine the Python load path.
1886 **** Support for the Python 'WITH' and 'AT' keywords.
1888 **** Improved tooltip completion.
1892 **** The SRecode manual is now included.
1894 **** Tag generation supports constructor/destructor settings and system
1895 include differentiation.
1897 **** Addition of 'Framework' support: Frameworks are specified when a
1898 particular kind of library (such as Android) is needed in a common language
1901 **** Support for nested templates and let variables override based on priority.
1903 **** Support for merging tables from multiple related modes, such as
1904 default -> c++ -> arduino.
1906 ** Compile has a new option `compilation-always-kill'.
1910 *** `custom-reset-button-menu' now defaults to t.
1912 *** Non-option variables are never matched in `customize-apropos' and
1913 `customize-apropos-options' (i.e., the prefix argument does nothing for
1914 these commands now).
1918 *** The variables `term-default-fg-color' and `term-default-bg-color'
1919 are now deprecated in favor of the customizable face `term'.
1921 *** You can customize how to display ANSI terminal colors and styles
1922 by customizing the corresponding `term-color-<COLOR>',
1923 `term-color-underline' and `term-color-bold' faces.
1927 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1929 *** Remote processes are now also supported on remote MS-Windows hosts.
1933 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1934 Previously, this slot stored semicolon-separated attribute-value pairs
1935 appended to some imap URLs, but this is not compatible with RFC 3986.
1936 So now the `filename' slot stores the entire path and query components,
1937 and the `attributes' slot is always nil.
1939 *** New function `url-encode-url' for encoding a URI string.
1940 The `url-retrieve' function now uses this to encode its URL argument,
1941 in case that is not properly encoded.
1943 ** notifications.el supports now version 1.2 of the Notifications API.
1944 The function `notifications-get-capabilities' returns the supported
1947 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1948 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1949 `flymake-warning-bitmap'.
1951 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1952 specifying URL types that should be converted to remote file names at
1953 the FFAP prompt. The default is now '("ftp").
1955 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1956 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1958 ** New option `mouse-avoidance-banish-position' specifies where the
1959 `banish' mouse avoidance setting moves the mouse.
1961 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1962 closing brackets to be aligned with the line of the opening bracket.
1964 ** In Proced mode, new command `proced-renice' renices marked processes.
1966 ** New option `async-shell-command-buffer' specifies the buffer to use
1967 for a new asynchronous `shell-command' when the default output buffer
1968 `*Async Shell Command*' is already in use.
1970 ** SQL mode has a new option `sql-db2-escape-newlines'.
1971 If non-nil, newlines sent to the command interpreter will be escaped
1972 by a backslash. The default does not escape the newlines and assumes
1973 that the sql statement will be terminated by a semicolon.
1975 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1976 (and modes that derive from it), sorts the column at point, or the Nth
1977 column if a numeric prefix argument is given.
1979 ** `which-func-modes' now defaults to t, so Which Function mode, when
1980 enabled, applies to all applicable major modes.
1982 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1985 ** Follow mode no longer works by using advice.
1986 The option `follow-intercept-processes' has been removed.
1988 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1990 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1991 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1992 *** semantic-change-hooks -> semantic-change-functions
1993 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1994 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1995 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1996 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1997 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1998 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1999 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2000 *** rcirc-activity-hooks -> rcirc-activity-functions
2001 *** rcirc-print-hooks -> rcirc-print-functions
2002 *** dbus-event-error-hooks -> dbus-event-error-functions
2003 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2004 *** checkdoc-style-hooks -> checkdoc-style-functions
2005 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2006 *** archive-extract-hooks -> archive-extract-hook
2007 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2008 *** hfy-post-html-hooks -> hfy-post-html-hook
2009 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2010 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2011 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2012 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2014 ** Obsolete packages
2017 In most cases, assoc+member+push+delq work just as well.
2018 And in any case it's just a terrible package: ugly semantics, terrible
2019 inefficiency, and not namespace-clean.
2028 * Incompatible Lisp Changes in Emacs 24.3
2030 ** Docstrings starting with `*' no longer indicate user options.
2031 Only variables defined using `defcustom' are considered user options.
2032 The function `user-variable-p' is now an obsolete alias for
2033 `custom-variable-p'.
2035 ** The return values of `defalias', `defun' and `defmacro' have changed,
2036 and are now undefined. For backwards compatibility, `defun' and
2037 `defmacro' currently return the name of the newly defined
2038 function/macro, but this should not be relied upon.
2040 ** `random' by default now returns a different random sequence in
2041 every Emacs run. Use `(random S)', where S is a string, to set the
2042 random seed to a value based on S, in order to get a repeatable
2043 sequence in later calls.
2045 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2046 that substring is inserted literally even if the LITERAL arg is
2047 non-nil, instead of causing an error to be signaled.
2049 ** `select-window' now always makes the window's buffer current.
2050 It does so even if the window was selected before.
2052 ** The function `x-select-font' can return a font spec, instead of a
2053 font name as a string. Whether it returns a font spec or a font name
2054 depends on the graphical library.
2056 ** `face-spec-set' no longer sets frame-specific attributes when the
2057 third argument is a frame (that usage was obsolete since Emacs 22.2).
2059 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2061 ** The CL package's `get-setf-method' function no longer exists.
2062 Generalized variables are now part of core Emacs Lisp, and implemented
2063 differently to the way cl.el used to do it. It is not possible to
2064 define a compatible replacement for `get-setf-method'. See the file
2065 gv.el for internal details of the new implementation.
2067 ** The arguments of `dbus-register-signal' are no longer just strings,
2068 but keywords or keyword-string pairs. The old argument list will
2069 still be supported for Emacs 24.x.
2071 ** Miscellaneous name changes
2072 Some Lisp symbols have been renamed to correct their spelling,
2073 or to be more consistent with standard Emacs terminology.
2075 *** Renamed functions
2076 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2077 **** inactivate-input-method -> deactivate-input-method
2078 **** quail-inactivate -> quail-deactivate
2079 **** robin-inactivate -> robin-deactivate
2080 **** viper-inactivate-input-method -> viper-deactivate-input-method
2081 **** viper-inactivate-input-method-action ->
2082 viper-deactivate-input-method-action
2083 **** ucs-input-inactivate -> ucs-input-deactivate
2086 The old hooks are still supported for backward compatibility, but they
2087 are deprecated and will be removed eventually.
2088 **** input-method-inactivate-hook -> input-method-deactivate-hook
2089 **** robin-inactivate-hook -> robin-deactivate-hook
2090 **** quail-inactivate-hook -> quail-deactivate-hook
2092 *** Renamed variables
2093 **** follow-deactive-menu -> follow-inactive-menu
2094 **** inactivate-current-input-method-function ->
2095 deactivate-current-input-method-function
2097 ** Some obsolete functions, variables, and faces have been removed:
2098 *** `last-input-char', `last-command-char', `unread-command-char'
2099 *** `facemenu-unlisted-faces'
2100 *** `rmail-decode-mime-charset'
2101 *** `iswitchb-read-buffer'
2102 *** `sc-version', `sc-submit-bug-report'
2103 *** `set-char-table-default'
2104 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2105 *** `compile-internal'
2107 *** `mode-line-inverse-video'
2108 *** `follow-mode-off-hook'
2109 *** `cvs-commit-buffer-require-final-newline'
2110 (use `log-edit-require-final-newline' instead)
2111 *** `cvs-changelog-full-paragraphs'
2112 (use `log-edit-changelog-full-paragraphs' instead)
2113 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2114 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2115 *** `vc-master-templates' (use `vc-handled-backends' instead)
2116 *** `vc-checkout-carefully'
2119 * Lisp Changes in Emacs 24.3
2121 ** CL-style generalized variables are now in core Elisp.
2122 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2123 You can define your own generalized variables using `gv-define-simple-setter',
2124 `gv-define-setter', etc.
2126 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2127 This can significantly speed up execution of non-byte-compiled code,
2128 but can also bump into previously unnoticed cyclic dependencies.
2129 These are generally harmless: they will simply cause the macro calls
2130 to be left for later expansion (as before), but will result in a
2131 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2132 You may wish to restructure your code so this does not happen.
2134 ** New sampling-based Elisp profiler.
2135 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2136 When finished, use M-x profiler-stop. The sampling rate can be based on
2137 CPU time or memory allocations.
2139 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2140 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2142 ** New macros `setq-local' and `defvar-local'.
2144 ** Face underlining can now use a wave.
2146 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2147 of `read-regexp' accepts a string ending with a colon and space, and its
2148 second argument DEFAULTS can be a list of strings accessible via `M-n'
2149 in the minibuffer ahead of other hard-coded useful regexp-related values.
2150 More commands use `read-regexp' now to read their regexp arguments.
2154 *** New function `completion-table-with-quoting' to handle completion
2155 in the presence of quoting, such as file completion in shell buffers.
2157 *** New function `completion-table-subvert' to use an existing completion
2158 table, but with a different prefix.
2162 *** New error type and new function `user-error'.
2163 These do not trigger the debugger.
2165 *** New option `debugger-bury-or-kill', saying what to do with the
2166 debugger buffer when exiting debug.
2168 *** Set `debug-on-message' to enter the debugger when a certain
2169 message is displayed in the echo area. This can be useful when trying
2170 to work out which code is doing something.
2172 *** New var `inhibit-debugger', automatically set to prevent accidental
2173 recursive invocations.
2177 *** New command `fit-frame-to-buffer' adjusts the frame height to
2180 *** The command `fit-window-to-buffer' can adjust the frame height
2181 if the new option `fit-frame-to-buffer' is non-nil.
2183 *** New macro `with-temp-buffer-window', similar to
2184 `with-output-to-temp-buffer'.
2186 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2189 *** New option `switch-to-buffer-preserve-window-point' to restore a
2190 window's point when switching buffers.
2192 *** New display action alist entries `window-height' and `window-width'
2193 specify the size of new windows created by `display-buffer'.
2195 *** New display action alist entry `pop-up-frame-parameters', if
2196 non-nil, specifies frame parameters to give any newly-created frame.
2198 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2199 tells display action functions to avoid changing which frame is
2202 *** New display action alist entry `previous-window', if non-nil,
2203 specifies window to reuse in `display-buffer-in-previous-window'.
2205 *** New display action functions `display-buffer-below-selected',
2206 and `display-buffer-in-previous-window'.
2208 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2209 now accept a third argument to avoid choosing the selected window.
2211 *** Additional values recognized for option `window-combination-limit'.
2213 *** The following variables are obsolete, as they can be replaced by
2214 appropriate entries in the `display-buffer-alist' function introduced
2216 **** `dired-shrink-to-fit'
2217 **** `display-buffer-reuse-frames'
2218 **** `display-buffer-function'
2219 **** `special-display-buffer-names'
2220 **** `special-display-frame-alist'
2221 **** `special-display-function'
2222 **** `special-display-regexps'
2226 *** `current-time-string' no longer requires that its argument's year
2227 must be in the range 1000..9999. It now works with any year supported
2228 by the underlying C implementation.
2230 *** `current-time' now returns extended-format time stamps
2231 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2232 PSEC is typically a multiple of 1000 on current machines. Other
2233 functions that use this format, such as `file-attributes' and
2234 `format-time-string', have been changed accordingly. Old-format time
2235 stamps are still accepted.
2237 *** The format of timers in `timer-list' and `timer-idle-list' is now
2238 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2239 The PSECS slot is new, and uses picosecond resolution. It can be
2240 accessed via the new `timer--psecs' accessor.
2242 *** Last-modified time stamps in undo lists now are of the form
2243 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2247 *** Improved security when handling persistent objects:
2249 **** `eieio-persistent-read' now features optional arguments for specifying
2250 the class to load, as well as a flag stating whether subclasses are allowed;
2251 if provided, other classes will be rejected by the reader. For
2252 compatibility with existing code, if the class is omitted only a
2255 **** New specialized reader for pulling in classes and signaling errors
2256 without evaluation of suspicious code.
2258 **** All slots that contain objects must have a :type. Slots with lists
2259 of objects must use a new type predicate for a list of an object type.
2261 *** Support for `find-function' and similar utilities, through the addition
2262 of filename support to generated symbols.
2264 ** Floating point functions now always return special values like NaN,
2265 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2266 Previously, they returned NaNs on some platforms but signaled errors
2267 on others. The affected functions are acos, asin, tan, exp, expt,
2268 log, log10, sqrt, and mod.
2270 ** New fringe bitmap `exclamation-mark'.
2272 ** Miscellaneous changes to special forms and macros
2274 *** `defun' and `defmacro' are now macros rather than special forms.
2276 *** `kbd' is now a function rather than a macro.
2278 ** Miscellaneous new functions
2280 *** `set-temporary-overlay-map' sets up a temporary keymap that
2281 takes precedence over most other maps for a short while (normally one key).
2283 *** `autoloadp' tests if its argument is an autoloaded object.
2285 *** `autoload-do-load' performs the autoloading operation.
2287 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2289 *** `file-name-base' returns a file name sans directory and extension.
2291 *** `function-get' fetches a function property, following aliases.
2293 *** `posnp' tests if an object is a `posn'.
2295 *** `system-users' returns the user names on the system.
2297 *** `system-groups' returns the group names on the system.
2299 *** `tty-top-frame' returns the topmost frame of a text terminal.
2301 ** The following functions and variables are obsolete:
2302 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2303 *** `buffer-has-markers-at'
2304 *** `macro-declaration-function' (use `macro-declarations-alist')
2305 *** `window-system-version' (provides no useful information)
2306 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2307 *** `query-replace-interactive'
2308 *** `font-list-limit' (has had no effect since Emacs < 23)
2311 * Changes in Emacs 24.3 on Non-Free Operating Systems
2313 ** Cygwin builds can use the native MS Windows user interface.
2314 Pass `--with-w32' to configure. The default remains the X11 interface.
2316 ** Two new functions are available in Cygwin builds:
2317 `cygwin-convert-file-name-from-windows' and
2318 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2319 code to access the Cygwin file-name mapping machinery to convert
2320 between Cygwin and Windows-native file and directory names.
2322 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2323 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2324 `mouse-autoselect-window'.
2326 ** On MS Windows Vista and later Emacs now supports symbolic links.
2328 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2329 support for libxml2, even if its presence is detected.
2331 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2333 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2334 directories to the search path. You must add them yourself if you want them.
2337 * Changes in Emacs 24.2
2339 ** This is mainly a bug-fix release.
2342 * Installation Changes in Emacs 24.1
2344 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2345 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2346 also depend on Gtk+. You can disable them with --without-rsvg and
2349 ** Emacs can be compiled with GnuTLS support.
2350 This happens by default if a suitably recent version of the library is
2351 found at build time. To prevent this, use the configure option
2352 `--without-gnutls'. See below for GnuTLS features.
2354 ** Emacs can be compiled with SELinux support.
2355 This happens by default if a suitably recent version of the library is
2356 found at build time. To prevent this, use the configure option
2357 `--without-selinux'. See below for SELinux features.
2359 ** Emacs can be compiled with ImageMagick support.
2360 This happens by default if a suitably recent version of the library is
2361 found at build time. To prevent this, use the configure option
2362 `--without-imagemagick'. See below for ImageMagick features.
2363 This feature is not available for the Nextstep or MS ports.
2365 ** Emacs can be compiled with libxml2 support.
2366 This happens by default if a suitably recent version of the library is
2367 found at build time. To prevent this, use the configure option
2368 `--without-xml2'. See below for libxml2 features.
2370 ** By default, the installed Info and man pages are compressed.
2371 You can disable this by configuring --without-compress-info.
2373 ** New configure option --with-wide-int.
2374 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2375 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2378 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2379 These provide no new functionality, they just remove the need to edit
2380 lib-src/Makefile by hand in order to use the associated features.
2382 ** New configure option --enable-use-lisp-union-type.
2383 This is only useful for Emacs developers to debug certain types of bugs.
2384 This is not a new feature; only the configure flag is new.
2386 ** The standalone programs digest-doc and sorted-doc are removed.
2387 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2389 ** The standalone program `fakemail' is removed.
2390 If you need it, feedmail.el provides a superset of the functionality.
2393 * Startup Changes in Emacs 24.1
2395 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2396 command line arguments, and the EMACS_UNIBYTE environment variable, no
2397 longer have any effect. (They were declared obsolete in Emacs 23.)
2399 ** New command line option `--no-site-lisp' removes site-lisp directories
2400 from load-path. -Q now implies this. This option does not affect the
2401 EMACSLOADPATH environment variable (and hence has no effect for
2405 * Changes in Emacs 24.1
2409 *** Many packages now use the `completion-at-point' command,
2410 rather than implementing separate completion commands.
2412 *** `completion-at-point' now handles tags and semantic completion.
2414 *** Completion in a non-minibuffer now tries to detect the end of completion
2415 and pops down the *Completions* buffer accordingly.
2417 *** New option `completion-cycle-threshold' allows completion cycling.
2419 *** New option `completion-category-overrides' for overriding the
2420 default completion style in certain circumstances.
2422 *** New completion style `substring'.
2424 *** Completion of buffer names uses `substring' completion by default.
2426 *** The option `widget-complete-field' has been removed.
2430 *** The first time you try sending mail, Emacs asks for a mail method.
2431 This is implemented by a new default for `send-mail-function', which
2432 is `sendmail-query-once'. This offers to use the smtpmail package, or
2433 to use the old defaults relying on external mail facilities
2434 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2435 `mailclient-send-it' on Windows).
2437 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2438 transfers the report to your desktop's preferred mail client, if there
2439 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2442 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2443 and Mail mode changes
2445 ** Emacs server and client changes
2447 *** New option `server-port' specifies the port for TCP Emacs servers.
2449 *** New emacsclient argument -q/--quiet suppresses some status messages.
2451 *** New emacsclient argument --frame-parameters specifies the frame
2452 parameters of any newly-created graphical frame.
2454 *** If emacsclient shuts down due to Emacs signaling an error,
2455 its exit status is 1.
2457 *** New emacsclient argument --parent-id ID.
2458 This opens a client frame in parent X window ID, via XEmbed, similar
2459 to the --parent-id argument to Emacs.
2461 ** Internationalization changes
2463 *** Emacs now supports display and editing of bidirectional text.
2464 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2465 displayed in the correct visual order as expected by users of those
2466 scripts. The display reordering is a "full bidirectionality" class
2467 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2468 with no RTL text should look exactly the same as before.
2470 **** New buffer-local variable `bidi-display-reordering'.
2471 To disable display reordering in a buffer, change this to nil.
2473 **** New buffer-local variable `bidi-paragraph-direction'.
2474 If nil (the default), Emacs determines the base direction of each
2475 paragraph from its text, as specified by the UBA. Setting the value
2476 to `right-to-left' or `left-to-right' forces a base direction on each
2479 Paragraphs with right-to-left base direction are displayed starting at
2480 the right window edge.
2482 *** Enhanced support for characters with no glyphs in available fonts,
2483 or, on text terminals, characters that cannot be encoded by the
2484 terminal coding system. The new option `glyphless-char-display-control'
2485 specifies how to display them: as a hexadecimal code in a box, a thin
2486 1-pixel space, an empty box, etc.
2488 *** New input methods for Farsi and Bulgarian
2489 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2491 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2492 (U+2010 and U+2011).
2494 *** New Hebrew translation of the Emacs Tutorial.
2495 Type `C-u C-h t' to choose it in case your language setup doesn't
2496 automatically select it.
2498 ** An Emacs Lisp package manager is now included.
2499 This is a convenient way to download and install additional packages,
2500 from a package repository at http://elpa.gnu.org.
2502 *** M-x list-packages shows a list of packages, which can be
2503 selected for installation.
2505 *** New command `describe-package', bound to `C-h P'.
2507 *** By default, all installed packages are loaded automatically when
2508 Emacs starts up. To disable this, set `package-enable-at-startup' to
2509 nil. To specify the packages to load, customize `package-load-list'.
2511 ** Custom theme changes
2513 *** New command `M-x customize-themes', which provides a convenient
2514 interface for enabling and disabling Custom themes.
2516 *** New option `custom-theme-load-path' is the load path for themes.
2517 Emacs no longer looks for Custom themes in `load-path'. The default
2518 value of `custom-theme-load-path' says to look for themes in
2519 `custom-theme-directory', followed by a subdirectory of
2520 `data-directory' named "themes/", which contains a small selection of
2521 built-in Custom themes.
2523 *** New option `custom-safe-themes' records known-safe theme files.
2524 If a theme is not in this list, Emacs queries before loading it, and
2525 offers to save the theme to `custom-safe-themes' automatically. By
2526 default, all themes included in Emacs are treated as safe.
2528 ** Improved GTK integration
2530 *** GTK scroll-bars are now placed on the right by default.
2531 The function `set-scroll-bar-mode' can change this.
2533 *** GTK tool bars can have just text, just images or images and text.
2534 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2535 the default is taken from desktop settings.
2537 *** GTK tool bars can be placed on any edge of the frame.
2538 The frame-parameter tool-bar-position controls this. It takes the
2539 values top, left, right or bottom. The Options => Show/Hide menu has
2542 *** The default colors for selected text (the `region' face) are taken
2543 from the GTK theme when Emacs is built with GTK.
2545 *** Emacs uses GTK tooltips by default if built with GTK.
2546 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2548 ** Graphical interface changes
2550 *** On graphical displays, the mode-line no longer ends in dashes.
2551 Also, the first dash (which does not indicate anything) is just
2552 displayed as a space.
2554 *** `menu-bar-select-buffer-function' lets you choose another operation
2555 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2557 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2558 built with Xft. These fonts can be set via X resources, for example:
2559 Emacs.pane.menubar.font: Courier-12
2563 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2564 or if it receives a SIGINT signal in batch mode.
2566 *** `kill-emacs-hook' is now also run in batch mode.
2567 Third-party code which adds to `kill-emacs-hook' should check if they
2568 do the right thing in batch mode.
2570 ** Scrolling changes
2572 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2573 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2574 of buffer at first key-press (instead they move to top/bottom of buffer)
2575 when `scroll-error-top-bottom' is non-nil.
2577 *** New option `scroll-error-top-bottom' (see above).
2579 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2580 scroll a line instead of full screen.
2582 *** New property `scroll-command' should be set on a command's symbol to
2583 define it as a scroll command affected by `scroll-preserve-screen-position'.
2585 *** If you customize `scroll-conservatively' to a value greater than 100,
2586 Emacs will never recenter point in the window when it scrolls due to
2587 cursor motion commands or commands that move point (e.f., `M-g M-g').
2588 Previously, you needed to use `most-positive-fixnum' as the value of
2589 `scroll-conservatively' to achieve the same effect.
2591 *** "Aggressive" scrolling now honors the scroll margins.
2592 If you customize `scroll-up-aggressively' or
2593 `scroll-down-aggressively' and move point off the window, Emacs now
2594 scrolls the window so as to avoid positioning point inside the scroll
2597 ** Basic SELinux support has been added.
2598 This requires Emacs to be linked with libselinux at build time.
2600 *** Emacs preserves the SELinux file context when backing up.
2601 Also, the function `copy-file' has an extra optional argument for
2602 preserving SELinux context, and the return value of `backup-buffer'
2603 now includes the SELinux context.
2605 *** New functions `file-selinux-context' and `set-file-selinux-context'
2606 get and set the SELinux context of a file.
2610 *** `delete-by-moving-to-trash' now only affects commands that specify
2611 trashing. This avoids inadvertently trashing temporary files.
2613 *** Calling `delete-file' or `delete-directory' with a prefix argument
2614 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2616 ** File- and directory-local variable changes
2618 *** You can stop directory local vars from applying to subdirectories.
2619 Add an element (subdirs . nil) to the alist portion of any variables
2620 settings to indicate that the section should not apply to
2623 *** Directory local variables can apply to some file-less buffers.
2624 Affected modes include dired, vc-dir, and log-edit. For example,
2625 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2626 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2627 `hack-dir-local-variables-non-file-buffer' to support this.
2629 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2630 Instead, use "eval: (minor-mode 1)".
2632 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2633 to `inhibit-local-variables-regexps'. As the name suggests, it now
2634 applies to ALL file local variables, not just -*- lines. The
2635 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2640 *** The `quit-window' command now restores the last buffer displayed
2641 in the quitted window.
2643 *** Resizing an Emacs frame now preserves proportional window sizes,
2644 modulo restrictions like window minimum sizes and fixed-size windows.
2646 *** The behavior of `display-buffer' is now customizable in detail.
2648 **** New option `display-buffer-base-action' specifies a list of
2649 user-determined display "actions" (functions and optional arguments
2650 for choosing the displaying window).
2652 This takes precedence over the default display action, which is
2653 specified by `display-buffer-fallback-action'.
2655 **** New option `display-buffer-alist' maps buffer name regexps to
2656 display actions, taking precedence over `display-buffer-base-action'.
2658 *** New option `window-combination-limit'.
2659 The new option `window-combination-limit' allows to return the space
2660 obtained for resizing or creating a window more reliably to the window
2661 from which such space was obtained.
2663 *** New option `window-combination-resize'.
2664 The new option `window-combination-resize' allows to split a window that
2665 otherwise cannot be split because it's too small by stealing space from
2666 other windows in the same combination. Subsequent resizing or deletion
2667 of the window will resize all windows in the same combination as well.
2669 *** New option `frame-auto-hide-function' lets you choose between
2670 iconifying or deleting a frame when burying a buffer in a dedicated
2671 frame, or quitting a window showing a buffer in a frame of its own.
2673 *** New commands `maximize-window' and `minimize-window'.
2674 These maximize and minimize the size of a window within its frame.
2676 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2677 These functions allow to navigate through the live buffers that have
2678 been shown in a specific window.
2680 ** Minibuffer changes
2682 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2683 This is handy for minibuffer-only frames, and is also used for the feature
2684 where mouse-1 pops up *Messages*"', which can now easily be changed.
2686 *** Minibuffers set `truncate-lines' to nil.
2687 If you want to change the value to something else, you could use
2688 for example `minibuffer-setup-hook'.
2690 ** `auto-mode-case-fold' is now enabled by default.
2692 ** `backup-by-copying-when-mismatch' now defaults to t.
2694 ** New basic faces `error', `warning', `success'.
2695 These are used to highlight text indicating failure, caution or
2696 successful operation.
2698 ** New option `list-colors-sort' defines the color sort order
2699 for `list-colors-display'.
2701 ** The variable `focus-follows-mouse' now always defaults to nil.
2704 * Editing Changes in Emacs 24.1
2708 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2709 `isearch-yank-line'.
2711 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2712 `isearch-yank-kill'.
2714 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2716 ** New commands `count-words-region' and `count-words'.
2718 *** M-= is bound to `count-words-region', not `count-lines-region'.
2719 The `count-words-region' command, when called interactively, reports
2720 the number of lines, words, and characters in the region. It is a
2721 superset of the old `count-lines-region', which is now an obsolete
2724 ** The command `just-one-space' (M-SPC), if given a negative argument,
2725 also deletes newlines around point.
2729 *** New option `delete-active-region'.
2730 If non-nil, [delete] and DEL delete the region if it is active and no
2731 prefix argument is given. If set to `kill', those commands kill
2734 *** New command `delete-forward-char', bound to [delete].
2735 This is meant for interactive use, and obeys `delete-active-region'.
2736 The command `delete-char' does not obey `delete-active-region'.
2738 *** `delete-backward-char' is now a Lisp function.
2739 Apart from obeying `delete-active-region', its behavior is unchanged.
2740 However, the byte compiler now warns if it is called from Lisp; Lisp
2741 callers should use delete-char with a negative argument instead.
2743 *** The option `mouse-region-delete-keys' has been deleted.
2745 ** Selection changes.
2747 The default handling of clipboard and primary selections has been
2748 changed to conform with modern X applications. In short, most
2749 commands for killing and yanking text now use the clipboard, while
2750 mouse commands use the primary selection.
2752 In the following, we provide a list of these changes, followed by a
2753 list of steps to get the old behavior back if you prefer that.
2755 *** `select-active-regions' now defaults to t.
2756 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2757 the kill ring. The selected text is put in the primary selection, if
2758 the system possesses a separate primary selection facility (e.g. X).
2760 **** `select-active-regions' also accepts a new value, `only'.
2761 This means to only set the primary selection for temporarily active
2762 regions (usually made by mouse-dragging or shift-selection);
2763 "ordinary" active regions, such as those made with C-SPC followed by
2764 point motion, do not alter the primary selection.
2766 **** `mouse-drag-copy-region' now defaults to nil.
2768 *** mouse-2 is now bound to `mouse-yank-primary'.
2769 This pastes from the primary selection, ignoring the kill-ring.
2770 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2772 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2774 *** `x-select-enable-primary' now defaults to nil.
2775 Thus, commands that kill text or copy it to the kill-ring (such as
2776 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2778 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2779 exactly equivalent to M-w, C-w, and C-y respectively.
2781 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2782 non-nil by default, as Windows does not support the primary selection
2783 between applications.
2785 *** To return to the previous behavior, do the following:
2787 **** Change `select-active-regions' to nil.
2788 **** Change `mouse-drag-copy-region' to t.
2789 **** Change `x-select-enable-primary' to t (on X only).
2790 **** Change `x-select-enable-clipboard' to nil.
2791 **** Bind `mouse-yank-at-click' to mouse-2.
2793 *** Support for X cut buffers has been removed.
2795 *** X clipboard managers are now supported.
2796 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2798 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2799 in the current rectangle. With a prefix argument, this prompts for a
2800 number to count from and for a format string.
2802 ** `redisplay-dont-pause' now defaults to t.
2803 This makes Emacs feel more responsive to editing commands that arrive
2804 at high rate, e.g. if you lean on some key, because stopping redisplay
2805 in the middle (when this variable is nil) forces more expensive
2806 updates later on, and Emacs appears to be unable to keep up.
2808 ** The behavior of <TAB> for active regions in Text mode has changed.
2809 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2810 when the region is active causes Emacs to indent all the lines in the
2811 region, aligning them with the line previous to the first line in the
2812 region (or with the left margin if there is no previous line).
2814 ** When `occur' is called with a prefix argument, matching strings are
2815 collected into the `*Occur*' buffer without line numbers. If there
2816 are parenthesized subexpressions in the specified regexp, `occur'
2817 reads replacement text that may contain \\& and \\N whose convention
2818 follows `replace-match'.
2821 * Changes in Specialized Modes and Packages in Emacs 24.1
2823 ** Archive Mode has basic support for browsing and updating 7z archives.
2827 *** BibTeX mode now supports biblatex.
2828 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2829 `bibtex-entry-field-alist' is now an obsolete alias for
2830 `bibtex-BibTeX-entry-alist'.
2832 *** New command `bibtex-search-entries', bound to C-c C-a.
2834 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2836 *** New variable `bibtex-search-entry-globally'.
2840 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2842 *** The default browser used by the package is now the "xdg-open" program,
2843 on platforms that support it. This calls your desktop's preferred browser.
2847 *** Support for musical notes.
2849 *** Support for logarithmic units.
2851 *** No longer uses the tex prefix for TeX specific unit names when
2852 using TeX or LaTeX mode.
2854 *** New option to highlight selections using faces.
2856 *** `calc-histogram' has the option of using a vector to determine the bins.
2858 *** New "O" option prefix.
2860 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2862 ** Calendar, Diary, and Appt
2864 *** Diary entries can contain non-printing "comments".
2865 See the variable `diary-comment-start'.
2867 *** Appointments can specify their individual warning times.
2868 See the variable `appt-warning-time-regexp'.
2870 *** The function specified by `appt-disp-window-function' may be passed
2871 lists of arguments if multiple appointments are due at similar times.
2872 If you are using a custom function for this, you should update it.
2874 *** New function `diary-hebrew-birthday'.
2876 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2877 may no longer be nil, but must all be strings.
2879 *** The obsolete (since Emacs 22.1) method of enabling the appt
2880 package by adding `appt-make-list' to `diary-hook' has been removed.
2881 Use `appt-activate' instead.
2883 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2884 appt-issue-message (use the function appt-activate)
2885 appt-visible/appt-msg-window (use the variable appt-display-format)
2887 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2888 view-diary-entries, list-diary-entries, show-all-diary-entries
2892 *** New feature to "guess" the style in an existing buffer.
2893 The main entry point is M-x c-guess.
2895 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2897 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2898 Thus C-M-a will, by default, go to the beginning of the immediate function,
2901 *** "Macros with semicolons" can be registered for correct indentation.
2902 Where such a macro ends a line (no semicolon) the next statement is no longer
2903 parsed as a statement continuation.
2905 ** Comint and modes derived from it use the standard completion code.
2909 *** Compilation mode can be used without Font Lock mode.
2910 `compilation-parse-errors-function' is now obsolete.
2912 *** New variable `compilation-filter-start', which is bound while
2913 `compilation-filter-hook' runs. It records the start position of the
2914 text inserted by `compilation-filter'.
2916 *** `compilation-error-screen-columns' and `compilation-first-column'
2917 are obeyed in the editing buffer. So programming language modes can
2918 set them, whereas previously only the value in the *Compilation*
2923 *** Customize buffers now contain a search field.
2924 The search is performed using `customize-apropos'.
2925 To turn off the search field, set `custom-search-field' to nil.
2927 *** Options in customize group buffers start out hidden if not customized.
2928 Use the arrow to the left of the option name to toggle visibility.
2930 *** custom-buffer-sort-alphabetically now defaults to t.
2932 *** The color widget now has a "Choose" button, which allows you to
2933 choose a color via `list-colors-display'.
2937 *** It is now possible to access buses other than the default system
2940 *** The `dbus-register-method' and `dbus-register-property' functions
2941 optionally do not register names.
2943 *** The new function `dbus-register-service' registers a known service
2944 name on a D-Bus without also registering a property or a method.
2948 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2949 if called with a prefix argument, read a file name from the minibuffer
2950 instead of using the current buffer.
2952 *** The "dired local variables" feature of Dired-x is obsolete.
2953 The standard directory local variables feature replaces it.
2957 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2958 controlling attempts to autojoin a channel.
2960 *** New variable `erc-coding-system-precedence': If we use `undecided'
2961 as the server coding system, this variable will then be consulted.
2962 The default is to decode strings that can be decoded as utf-8 as
2963 utf-8, and do the normal `undecided' decoding for the rest.
2967 *** The default value of `eshell-directory-name' has changed
2968 to be an "eshell" directory in `user-emacs-directory'.
2969 The old "~/.eshell/" directory is still used if it exists, though.
2973 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2974 It now supports multithread non-stop debugging and simultaneous
2975 debugging of several threads.
2979 *** RET (`image-toggle-animation') toggles animation, if applicable.
2980 Animation plays once, unless the option `image-animate-loop' is non-nil.
2984 *** New command M-x info-display-manual displays a named Info manual.
2985 If that manual is already visited in some Info buffer, it displays
2986 that buffer. (This is handy if you have many manuals in many *info*
2987 buffers, and don't remember the name of the buffer visiting the manual
2988 you want to consult.) Otherwise, it loads and displays the manual.
2990 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2991 This is for compatibility with the stand-alone Info reader program,
2992 and also because `Info-edit' is a rarely used command that is disabled
2995 ** Mail mode changes (not Message mode)
2997 *** New command M-x mail-add-attachment for adding MIME attachments
2999 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3000 (Its name is misleading, since it has nothing to do with MIME
3001 attachments.) The old name is now an obsolete alias to the new name.
3003 ** MH-E has been updated to MH-E version 8.3.1.
3004 See MH-E-NEWS for details.
3006 ** Modula-2 mode provides auto-indentation.
3008 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3010 ** nXML mode no longer binds C-RET to `nxml-complete'.
3011 Completion is now performed via `completion-at-point', bound to C-M-i
3012 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3013 default), this performs tag completion.
3015 ** Org mode has been updated to version 7.8.09.
3016 See ORG-NEWS for details.
3018 ** Prolog mode has been completely revamped, with lots of additional
3019 functionality such as more intelligent indentation, electricity,
3020 support for more variants, including Mercury, and a lot more.
3024 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3025 in the Rmail incoming message.
3027 *** The variable `rmail-message-filter' no longer has any effect.
3028 This change was made in Emacs 23.1 but was not advertised at the time.
3029 Try using `rmail-show-message-hook' instead.
3033 *** M-x shell prompts for the shell path name if the default directory
3034 is a remote file name and neither the environment variable $ESHELL nor
3035 the variable `explicit-shell-file-name' is set.
3037 *** TAB is now bound to the standard `completion-at-point' command,
3038 which now implements the pcomplete rules for shell command completion.
3042 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3043 if the mail server supports them. This uses either built-in GnuTLS
3044 support, or the starttls.el library. Customize `smtpmail-stream-type'
3047 *** The variable `smtpmail-auth-credentials' has been removed.
3048 By default, the information is now stored in the file ~/.authinfo.
3049 This was the default value of smtpmail-auth-credentials. If you had
3050 customized smtpmail-auth-credentials to a list of user names and
3051 passwords, those settings are not used. During your first connection
3052 to the smtp server, Emacs will prompt for the user name and password,
3053 and offer to save them to ~/.authinfo. Or you can manually copy the
3054 credentials to ~/.authinfo. For example, if you had
3056 (setq smtpmail-auth-credentials
3057 '(("mail.example.org" 25 "jim" "s!cret")))
3059 then the equivalent line in ~/.authinfo would be
3061 machine mail.example.org port 25 login jim password s!cret
3063 See the auth-source manual for more information, e.g. on encrypting
3064 the credentials file.
3066 *** The variable `smtpmail-starttls-credentials' has been removed.
3067 If you had that set, you need to put
3069 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3071 in your ~/.authinfo file instead.
3073 *** SMTPmail defaults to using the address in the From: header as the
3074 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3075 to the address you wish to use instead.
3079 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3080 and `sql-oracle-scan-on'.
3082 *** New options controlling prompting for login parameters.
3083 Each supported product has a custom variable `sql-*-login-params',
3084 which is a list of the parameters to be prompted for before a
3085 connection is established.
3087 *** The command `sql-product-interactive' now takes a prefix argument,
3088 which causes it to prompt for an SQL product.
3090 *** Product-specific SQL interactive commands now take prefix arguments.
3091 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3092 given a prefix argument, prompt for a name for the SQL interactive
3093 buffer. This reduces the need for calling `sql-rename-buffer'.
3095 *** SQL interactive modes suppress command continuation prompts, and
3096 replace tabs with spaces. The first change impacts multiple line SQL
3097 statements entered with C-j between each line, statements yanked into
3098 the buffer and statements sent with `sql-send-*' functions. The
3099 second prevents the MySQL and Postgres interpreters from listing
3100 object name completions when sent text via `sql-send-*' functions.
3102 *** New command `sql-connect' starts a predefined SQLi session,
3103 using the login parameters from `sql-connection-alist'.
3105 *** New "Save Connection" menu item in SQLi buffers.
3106 This gathers the login params specified for the SQLi session, if it
3107 was not started by a connection, and saves them as a new connection.
3109 *** New commands for listing database objects and details:
3110 sql-list-all and sql-list-table.
3112 *** An API for manipulating SQL product definitions has been added.
3116 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3120 *** New inline access method "ksu" (kerberized su).
3122 *** The following access methods are discontinued: "ssh1_old",
3123 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3125 *** The user option `remote-file-name-inhibit-cache' controls whether
3126 remote file attributes are cached for better performance.
3128 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3129 default value to "".
3131 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3132 for remote machines which support SELinux.
3134 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3135 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3136 the degree of parallelism.
3138 ** VC and related modes
3140 *** Support for pulling on distributed version control systems.
3141 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3142 supported (currently with Bzr, Git, and Mercurial), to update the
3143 current branch and working tree. A prefix argument means to prompt
3144 the user for specifics, e.g. a pull location.
3146 *** `vc-update' is now an alias for `vc-pull'.
3148 *** Support for merging on distributed version control systems.
3149 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3150 is supported (currently with Bzr, Git, and Mercurial), to merge
3151 changes from another branch into the current one. It prompts for
3152 specifics, e.g. a merge source.
3154 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3155 shows a diff while querying the user. It defaults to t.
3157 *** Log entries in some Log View buffers can be toggled to display a
3158 longer description by typing RET (log-view-toggle-entry-display).
3159 This is currently supported for Bzr, Git, and Mercurial (to support
3160 another backend, define a `log-view-expanded-log-entry-function').
3161 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3162 use this to display the full log entry for the revision at point.
3164 *** New command `vc-ediff' allows visual comparison of two revisions
3165 of a file similar to `vc-diff', but using ediff backend.
3167 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3168 this was not advertised at the time.
3170 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3171 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3172 this was not advertised at the time.
3178 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3180 *** partial-completion-mode (complete.el) is obsolete.
3181 You can get a comparable behavior with:
3182 (setq completion-styles '(partial-completion initials))
3183 (setq completion-pcm-complete-word-inserts-delimiters t)
3185 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3187 *** pgg is obsolete (use EasyPG instead).
3189 *** sregex.el is obsolete, since rx.el is a strict superset.
3191 *** s-region.el and pc-select.el are obsolete.
3192 They are superseded by shift-select-mode, enabled by default since 23.1.
3194 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3198 *** The Landmark game is now invoked with `landmark', not `lm'.
3199 Its functions and variables have been similarly renamed.
3201 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3202 (This interfered with cua-mode.)
3204 *** f90.el has some support for Fortran 2008 syntax.
3206 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3208 *** New command `nato-region' converts text to NATO phonetic alphabet.
3211 * New Modes and Packages in Emacs 24.1
3213 ** Occur Edit mode applies edits made in *Occur* buffers to the
3214 original buffers. It is bound to "e" in Occur mode.
3216 ** New global minor mode electric-pair-mode.
3217 When enabled, typing an open parenthesis automatically inserts the
3218 matching closing one.
3220 ** New global minor mode electric-indent-mode.
3221 When enabled, typing certain characters triggers reindentation.
3222 Major modes wishing to use this can set electric-indent-chars or
3223 electric-indent-functions.
3225 ** New global minor mode electric-layout-mode.
3226 When enabled, typing certain characters automatically inserts newlines.
3227 Major modes wishing to use this can set electric-layout-rules.
3229 ** tabulated-list.el provides a generic major mode for tabulated data,
3230 from which other modes can be derived.
3232 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3234 ** secrets.el is an implementation of the Secret Service API, an
3235 interface to password managers like GNOME Keyring or KDE Wallet. The
3236 Secret Service API requires D-Bus for communication. The command
3237 `secrets-show-secrets' offers a buffer with a visualization of the
3240 ** notifications.el provides an implementation of the Desktop
3241 Notifications API. It requires D-Bus for communication.
3243 ** soap-client.el supports access to SOAP web services from Emacs.
3244 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3246 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3248 ** New emacs-lock.el package.
3249 The previous version has been moved to obsolete/old-emacs-lock.el.
3250 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3251 against exiting Emacs and killing the buffer can be set separately.
3252 The mechanism for automatically turning off protection for buffers
3253 with dead inferior processes has been generalized.
3256 * Incompatible Lisp Changes in Emacs 24.1
3258 ** Passing a nil argument to a minor mode function call now ENABLES
3259 the minor mode unconditionally. This is so that you can write e.g.
3261 (add-hook 'text-mode-hook 'foo-mode)
3263 to enable foo-mode in Text mode buffers, removing the need for
3264 `turn-on-foo-mode' style functions. This affects all mode commands
3265 defined by `define-minor-mode'. If called interactively, the mode
3266 command still toggles the minor mode.
3268 ** The return value of `backup-buffer' has changed.
3269 It is now a list of three elements, where the second element is a list
3270 describing the original file's SELinux context. If Emacs or the
3271 system lacks SELinux support, the context list is (nil nil nil nil).
3272 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3274 ** `char-direction-table' and the `char-direction' function were deleted.
3275 They were buggy and inferior to the new support of bidirectional
3276 editing introduced in Emacs 24. If you need the bidirectional
3277 properties of a character, use `get-char-code-property' with the last
3278 argument `bidi-class'.
3280 ** `copy-directory' now copies the source directory as a subdirectory
3281 of the target directory, if the latter is an existing directory. The
3282 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3283 the contents directly into a pre-existing target directory.
3285 ** For mouse click input events in the text area, the Y pixel
3286 coordinate in the POSITION list now counts from the top of the text
3287 area, excluding any header line. Previously, it counted from the top
3290 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3291 been further reduced. Now a backquote not followed by a space is
3292 always treated as a "new-style" backquote. Please remove all
3293 "old-style" backquotes from your code. If your code uses backquotes
3294 as documented in the Elisp manual, and compiles without warning, then
3295 you have nothing to do in this regard. Code not following the
3296 appropriate conventions may fail to compile.
3298 The most common cause of trouble seems to be an old-style backquote
3299 followed by a newline. Another cause of trouble is vector notation
3300 for key sequence notation: instead of [(control ,)] and [(control ')],
3301 you should write [(control ?,)] and [(control ?')], which will work in
3304 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3305 was not advertised at the time. The function `custom-initialize-delay'
3306 replaced all known uses.
3308 ** `view-buffer' now treats special mode-class in the same way that
3309 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3310 major mode is special).
3312 ** Menu and tool bar changes
3314 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3315 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3316 With these alist entries omitted, `make-frame' checks the value of the
3317 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3318 a menu-bar or tool-bar, respectively. If the alist entries are added,
3319 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3321 *** The menu bar bindings's caches are not used any more.
3322 Use (where-is-internal <def> nil t) instead.
3324 ** Regions created by mouse dragging are now normal active regions,
3325 similar to those created by shift-selection (see Selection changes
3326 above). In previous Emacs versions, these regions were delineated by
3327 `mouse-drag-overlay'; that variable has been removed.
3329 ** The fourth argument of `filter-buffer-substring' has been removed.
3330 If you want to remove text properties from the final result, simply
3331 pass the result through substring-no-properties.
3333 ** cl.el no longer provides `cl-19'.
3335 ** The following obsolete functions and aliases have been removed
3336 (the appropriate new function is given in parentheses; "not needed"
3337 means you can just remove all calls to the function in question):
3339 *** `comint-kill-output' (`comint-delete-output')
3340 *** `decompose-composite-char' (`char-to-string')
3341 *** `outline-visible' (`outline-invisible-p')
3342 *** `internal-find-face' (`facep')
3343 *** `internal-get-face' (`facep and check-face')
3344 *** `frame-update-faces' (not needed)
3345 *** `frame-update-face-colors' (`frame-set-background-mode')
3346 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3347 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3348 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3349 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3350 *** `x-make-font-unbold' (`make-face-unbold')
3351 *** `x-make-font-unitalic' (`make-face-unitalic')
3352 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3353 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3354 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3355 *** `char-bytes' (== 1)
3356 *** `isearch-return-char' (`isearch-printing-char')
3357 *** `make-local-hook' (not needed)
3358 *** `set-screen-height' (`set-frame-height')
3359 *** `set-screen-width' (`set-frame-width')
3361 ** The following obsolete variables and varaliases have been removed
3362 (the appropriate new variable is given in parentheses):
3364 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3365 *** `vc-header-alist' (`vc-BACKEND-header')
3366 *** `directory-sep-char' (== ?/)
3367 *** `font-lock-defaults-alist' (`font-lock-defaults')
3368 *** `e' (`float-e').
3370 ** The following obsolete files were removed:
3371 sc.el, x-menu.el, rnews.el, rnewspost.el
3373 ** The format of the finder-inf.el file has changed, since the Finder
3374 mechanism is now based on the package system. The variable
3375 `finder-package-info' is replaced by `package--builtins' and
3376 `finder-keywords-hash'.
3378 ** When generating autoloads, `update-directory-autoloads' no longer
3379 assumes every inspected file is in your `load-path'. It instead
3380 generates relative names according to the current `load-path'.
3383 * Lisp Changes in Emacs 24.1
3385 ** Code can now use lexical scoping by default instead of dynamic scoping.
3386 The `lexical-binding' variable enables lexical scoping for local
3387 variables. It is typically set via a file-local variable in the first
3388 line of the file, in which case it applies to all the code in that
3391 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3392 binding instead of the old dynamic binding mode.
3394 *** Lexically scoped interpreted functions are represented with a new form
3395 of function value which looks like (closure ENV ARGS &rest BODY).
3397 *** New macro `letrec' to define recursive local functions.
3399 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3400 So do `defcustom' and other forms that call `defvar' as a subroutine.
3402 *** New function `special-variable-p' to check whether a variable is
3403 declared as dynamically bound.
3405 *** The form ((lambda ...) ...) is deprecated.
3407 ** An Emacs Lisp testing tool is now included.
3408 Emacs Lisp developers can use this tool to write automated tests for
3409 their code. See the ERT info manual for details.
3411 ** Changes for bidirectional display and editing
3413 *** New function `current-bidi-paragraph-direction'.
3414 This returns the base direction of the paragraph at point.
3416 *** New function `bidi-string-mark-left-to-right'.
3417 Given a string containing characters from right-to-left scripts, this
3418 function returns another string which can be safely inserted into a
3419 buffer, such that any following text will be always displayed to the
3420 right of that string. (This works by appending an invisible Unicode
3421 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3423 This is useful when the buffer has overall left-to-right paragraph
3424 direction and you need to insert a string whose contents are not known
3425 in advance, without disrupting the layout of the line.
3429 *** Window tree functions are accessible in Elisp.
3430 Functions are provided to return the parent, siblings or child windows
3431 of any window including internal windows (windows not associated with a
3432 buffer) in the window tree.
3434 **** New function `window-valid-p' gives non-nil for live and internal
3437 **** Window manipulation can deal with internal windows.
3438 Many window handling functions like `split-window', `delete-window', or
3439 `delete-other-windows' as well as the window resizing functions can now
3440 act on any window including internal ones.
3442 *** window-total-height/-width vs window-body-height/-width.
3443 The function `window-height' has been renamed to `window-total-height'
3444 and `window-width' has been renamed to `window-body-width'. The old
3445 names are provided as aliases. Two new functions `window-total-width'
3446 and `window-body-height' are provided.
3448 *** Window parameters specific to window handling functions.
3449 For each window you can specify a parameter to override the default
3450 behavior of a number of functions like `split-window', `delete-window'
3451 and `delete-other-windows'. The variable `ignore-window-parameters'
3452 allows to ignore processing such parameters.
3454 *** New semantics of third argument of `split-window'.
3455 The third argument of `split-window' has been renamed to SIDE and can be
3456 set to any of the values 'below, 'right, 'above, or 'left to make the
3457 new window appear on the corresponding side of the window that shall be
3458 split. Any other value of SIDE will cause `split-window' to split the
3459 window into two side-by-side windows as before.
3461 *** Window resizing functions.
3462 A new standard function for resizing windows called `window-resize' has
3463 been introduced. This and all other functions for resizing windows no
3464 longer delete any windows when they become too small.
3466 *** Deleting the selected window now selects the most recently selected
3467 live window on that frame instead.
3469 *** `adjust-window-trailing-edge' adjustments.
3470 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3471 is able to resize other windows if a window adjacent to the trailing
3472 edge cannot be shrunk any more. This makes its behavior more similar to
3473 that of Emacs 21 without compromising, however, its inability to delete
3474 windows which was introduced in Emacs 22.
3476 *** Window-local buffer lists.
3477 Windows now have local buffer lists. This means that removing a buffer
3478 from display in a window will preferably show the buffer previously
3479 shown in that window with its previous window-start and window-point
3480 positions. This also means that the same buffer may be automatically
3481 shown twice even if it already appears in another window.
3483 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3484 which if non-nil requires the buffer to be displayed in the currently
3485 selected window, signaling an error otherwise. If nil, another window
3486 can be used, e.g. if the selected one is strongly dedicated.
3488 *** `split-window-vertically' and `split-window-horizontally' renamed
3489 to `split-window-below' and `split-window-right' respectively.
3490 The old names are kept as aliases.
3494 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3495 named ACTION, and takes a display action of the same form as
3496 `display-buffer-base-action' (see Changes, above). A non-nil,
3497 non-list value is treated specially, as the old meaning.
3499 **** New variable `display-buffer-overriding-action'.
3501 **** The procedure of `display-buffer' etc. to choose a window is
3502 determined by combining `display-buffer-overriding-action',
3503 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3504 and `display-buffer-fallback-action'. The second and fourth of these
3505 are user-customizable variables.
3507 See the docstring of `display-buffer' for details.
3509 *** New functions `window-state-get' and `window-state-put'.
3510 These functions allow to save and restore the state of an arbitrary
3511 frame or window as an Elisp object.
3515 *** New variable `completion-extra-properties' used to specify extra
3516 properties of the current completion:
3517 - :annotate-function, same as the old completion-annotate-function.
3518 - :exit-function, function to call after completion took place.
3520 *** Functions on `completion-at-point-functions' can return any of the
3521 properties valid for `completion-extra-properties'.
3523 *** `completion-annotate-function' is obsolete.
3525 *** New `metadata' method for completion tables. The metadata thus returned
3526 can specify various details of the data returned by `all-completions':
3527 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3528 used to select a style in completion-category-overrides.
3529 - `annotation-function' to add annotations in *Completions*.
3530 - `display-sort-function' to specify how to sort entries in *Completions*.
3531 - `cycle-sort-function' to specify how to sort entries when cycling.
3533 *** `minibuffer-local-filename-must-match-map' is not used any more.
3534 Instead, the bindings in `minibuffer-local-filename-completion-map'
3535 are combined with `minibuffer-local-must-match-map'.
3537 *** New variable `completing-read-function' allows overriding the
3538 behavior of `completing-read'.
3540 ** `glyphless-char-display' can now distinguish between graphical and
3541 text terminal display, via a char-table entry that is a cons cell.
3543 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3544 Instead, the offending function is removed.
3548 *** New function `run-hook-wrapped' for running an abnormal hook by
3549 passing the hook functions as arguments to a "wrapping" function.
3550 Like `run-hook-with-args-until-success', it stops at the first
3551 non-nil return value.
3553 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3554 set of "wrapping" filters, similar to around advice.
3555 (A version of this macro was actually added in Emacs 23.2 but was not
3556 advertised at the time.)
3560 *** New macro `condition-case-unless-debug' (this was actually added in
3561 Emacs 23.1 as condition-case-no-debug, but not advertised)
3563 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3565 *** Variable `stack-trace-on-error' removed.
3567 *** The debugger can now "continue" from an error, which means it will
3568 jump to the error handler as if the debugger had not been invoked
3569 instead of jumping all the way to the top-level.
3571 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3572 This can be useful when `inhibit-quit' is set.
3574 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3575 named Emacs server instances.
3577 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3578 to redirect STDOUT to a file.
3580 ** The function `format-time-string' now supports the %N directive,
3581 for higher-resolution time stamps.
3583 ** New input reading functions
3585 *** New function `read-char-choice' reads a restricted set of
3586 characters, discarding any inputs not inside the set.
3588 *** The command `read-color' now requires a match for a color name
3589 or RGB triplet, instead of signaling an error if the user provides
3592 **** `facemenu-read-color' is now an alias for `read-color'.
3594 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3595 The variable is now used to load all kind of supported dynamic libraries,
3596 not just image libraries. The previous name is still available as an
3599 ** Syntax parsing changes
3601 *** New variable `syntax-propertize-function'.
3602 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3603 This allows syntax-table properties to be set independently from font-lock:
3604 just call syntax-propertize to make sure the text is propertized.
3605 Together with this new variable come a new hook
3606 syntax-propertize-extend-region-functions, as well as two helper functions:
3607 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3608 as-is; and syntax-propertize-rules which provides a new way to specify
3611 *** Syntax tables support a new "comment style c" additionally to style b.
3613 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3615 ** frame-local variables cannot be let-bound any more.
3617 ** Major and minor mode changes
3619 *** `set-auto-mode' now respects mode: local variables at the end of files,
3620 as well as those in the -*- line.
3622 *** `prog-mode' is a new major mode from which programming modes
3625 **** `prog-mode-hook' can be used to enable features for programming
3626 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3627 on-the-fly spell checking for comments and strings.
3629 *** New hook `change-major-mode-after-body-hook', run by
3630 `run-mode-hooks' just before any other mode hooks.
3632 *** Enabled globalized minor modes can be disabled in specific major modes.
3633 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3634 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3636 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3638 ** File-handling changes
3640 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3641 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3642 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3643 argument is supplied (see Trash changes, above).
3645 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3647 ** Tool-bars can display separators.
3648 Tool-bar separators are handled like menu separators in menu-bar maps,
3649 i.e. via menu entries of the form `(menu-item "--")'.
3653 *** Animated images support (currently animated gifs only).
3655 **** `image-animated-p' returns non-nil if an image can be animated.
3657 **** `image-animate' animates a supplied image spec.
3659 **** `image-animate-timer' returns the timer object for an image that
3662 *** `image-extension-data' has been renamed to `image-metadata'.
3663 The old name is an obsolete alias to the new one.
3665 *** Image mode can view any image type that ImageMagick supports.
3666 This requires Emacs to be built with ImageMagick support.
3668 **** New function `imagemagick-types', defined if ImageMagick support
3669 is enabled, returns a list of image file extensions that your
3670 ImageMagick installation supports.
3672 **** New function `imagemagick-register-types' enables ImageMagick
3673 image types in Image mode and in `create-image' and other helper
3676 **** New option `imagemagick-types-inhibit' excludes certain
3677 ImageMagick image types from `imagemagick-register-types'.
3679 **** With ImageMagick support, there are extra Image mode commands to
3680 resize and rotate images: `image-transform-fit-to-height',
3681 `image-transform-fit-to-width', `image-transform-set-rotation', and
3682 `image-transform-set-scale'.
3684 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3685 passes it to the mail user agent function. This argument specifies an
3686 action for returning to the caller after finishing with the mail. For
3687 example, this is used by Rmail to optionally delete a mail window.
3689 ** XML and HTML parsing
3690 If Emacs is compiled with libxml2 support, there are two new
3691 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3692 and `libxml-parse-xml-region' (which parses XML). Both return an
3693 Emacs Lisp parse tree.
3695 ** Networking and encryption changes
3697 *** `open-network-stream' can now be used to open an encrypted stream.
3698 It now accepts an optional `:type' parameter for initiating a TLS
3699 connection, directly or via STARTTLS. To do STARTTLS, additional
3700 parameters (`:end-of-command', `:success', `:capabilities-command')
3701 must also be supplied.
3703 *** New library gnutls.el.
3704 The new function `gnutls-available-p' returns non-nil if Emacs is
3705 built with GnuTLS support. The main entry points are
3706 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3707 these functions through `open-network-stream', because that can
3708 upgrade connections through STARTTLS opportunistically or use plain
3709 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3712 *** New primitive `secure-hash' that supports many secure hash algorithms:
3713 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3714 sha1.el has been removed. The `sha1' feature is provided by default.
3718 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3720 ** Progress reporters can now "spin".
3721 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3722 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3723 time you call `progress-reporter-update' on that progress reporter,
3724 with a nil or omitted VALUE argument, the reporter message is
3725 displayed with a "spinning bar".
3727 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3728 being reverted, even if the buffer has a local `revert-buffer-function'.
3730 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3731 If delayed-warnings-list is non-nil, the command loop calls
3732 `delayed-warnings-hook' after `post-command-hook'. At present, this
3733 is only used by Emacs on some platforms to display warnings during
3734 startup, which might otherwise not be noticed. This uses the
3735 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3737 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3739 ** New function `make-composed-keymap' that constructs a new keymap
3740 from multiple input maps. You can use this to make a keymap that
3741 inherits from multiple maps, eg:
3742 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3744 ** New function `string-prefix-p'.
3745 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3747 ** New reader macro ## that stands for the empty symbol.
3748 This means that the empty symbol can now be read back. Also, #: by itself
3749 (when not immediately followed by a possible symbol character) stands for
3750 an empty uninterned symbol.
3752 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3754 ** The following functions and variables are obsolete:
3756 *** `tooltip-use-echo-area' is obsolete.
3757 Rather than setting this to t, disable Tooltip mode instead.
3759 *** buffer-substring-filters is obsolete.
3760 Use `filter-buffer-substring-functions' instead.
3762 *** `byte-compile-disable-print-circle' is obsolete.
3764 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3765 Use `post-command-hook' instead.
3767 *** `font-lock-maximum-size' is obsolete.
3770 * Changes in Emacs 24.1 on Non-Free Operating Systems
3772 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3773 and also when HOME is set to C:\ by default.
3775 ** New configure.bat options
3777 *** --enable-checking builds Emacs with extra runtime checks.
3779 *** --distfiles specifies files to be included in binary distribution.
3781 *** --without-gnutls disables automatic GnuTLS detection.
3783 *** --lib for general library linkage, works with the USER_LIBS build variable.
3785 ** New make target `dist' to create binary distribution for MS Windows.
3787 ** The Lisp function `w32-default-color-map' is now obsolete.
3788 (It is only used internally in the Emacs C code.)
3790 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3791 reappear on mouse-over. (Requires OS X 10.6 or later.)
3793 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3794 other platforms, rather than inserting its contents into the buffer.
3797 ----------------------------------------------------------------------
3798 This file is part of GNU Emacs.
3800 GNU Emacs is free software: you can redistribute it and/or modify
3801 it under the terms of the GNU General Public License as published by
3802 the Free Software Foundation, either version 3 of the License, or
3803 (at your option) any later version.
3805 GNU Emacs is distributed in the hope that it will be useful,
3806 but WITHOUT ANY WARRANTY; without even the implied warranty of
3807 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3808 GNU General Public License for more details.
3810 You should have received a copy of the GNU General Public License
3811 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3816 paragraph-separate: "[
\f]*$"