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 specially.
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` will always invoke `tmm-menubar', even if
111 `tty-menu-open-use-tmm' is nil.)
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as if they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
162 *** The command `describe-function' has been extended for EIEIO.
163 Running it on constructors will show a full description of the
164 generated class. For generic functions, it will show all
165 implementations together with links to the source. The old commands
166 `describe-class', `describe-constructor' and `describe-generic' were
170 *** The function `quail-help' is no longer an interactive command.
171 Use `C-h C-\' (`describe-input-method') instead.
176 *** ImageMagick images now support the :max-width and :max-height keywords.
179 *** When using `create-image' with image data, you can pass a :format
180 attribute (via the property-list argument) in order to help
181 ImageMagick detect the image type. The value should be a MIME
182 content-type that is found in the new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
190 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
191 `frame-configuration-to-register'. It offers similar functionality,
192 plus enhancements like the ability to restore deleted frames. The
193 command `frame-configuration-to-register' still exists, but is unbound.
196 *** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 *** Emacs can now draw dividers between adjacent windows. To put
201 dividers between side-by-side windows customize the frame parameter
202 right-divider-width to some positive integer. To put dividers between
203 vertically stacked windows set the frame parameter bottom-divider-width
204 to some positive integer. Dividers can be dragged with the mouse and
205 show a corresponding cursor when the mouse hovers over them. The
206 appearance of dividers can be changed by customizing the basic faces
207 window-divider, window-divider-first-pixel and window-divider-last-pixel
208 where the latter two are useful to provide a 3D effect or to better set
209 dividers apart from surrounding display objects.
212 *** `split-window' is now a non-interactive function, not a command.
213 As a command, it was a special case of `C-x 2' (`split-window-below'),
214 and as such superfluous. After being reimplemented in Lisp, its
215 interactive form was mistakenly retained.
218 *** New option `scroll-bar-adjust-thumb-portion'.
219 Available only on X, this option allows to control over-scrolling
220 using the scroll bar (i.e. dragging the thumb down even when the end
221 of the buffer is visible).
223 ** Lisp evaluation changes
225 *** `eval-defun' on an already defined defcustom calls the :set function,
229 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
230 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
231 zero prefix argument. This disables truncation of lists in the output,
232 equivalent to setting `(eval-expression-)print-length' and
233 `(eval-expression-)print-level' to nil. Additionally, it causes integers
234 to be printed in other formats (octal, hexadecimal, and character).
236 *** New hook `eval-expression-minibuffer-setup-hook' run by
237 `eval-expression' on entering the minibuffer.
240 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
243 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
244 because it affects caching of paragraph scanning results as well.
245 Also, it is now enabled by default.
248 ** The option `set-mark-default-inactive' has been deleted.
249 This unfinished feature was introduced by accident in Emacs 23.1;
250 simply disabling Transient Mark mode does the same thing.
252 ** The default value of `comment-use-global-state' is now t,
253 and this variable has been marked obsolete.
256 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
257 and works for git too, if you fetch the repository notes.
259 ** `read-regexp-defaults-function' defines a function to provide default
260 values for reading regexps by commands like `rgrep', `lgrep' `occur',
261 `highlight-regexp', etc. You can customize this to specify a function
262 that provides a default value from the regexp last history element,
263 or from the symbol found at point.
266 ** New option `load-prefer-newer' affects how the `load' function chooses
267 the file to load. If this is non-nil, then when both .el and .elc
268 versions of a file exist, and the caller did not explicitly specify
269 which one to load, then the newer file is loaded. The default, nil,
270 means to always load the .elc file.
273 * Editing Changes in Emacs 24.4
275 ** Indentation changes
278 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
279 When invoked without a prefix argument, it now activates a transient
280 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
281 the text indentation in the region. Typing any other key resumes
282 normal editing behavior.
284 *** `electric-indent-mode' is enabled by default.
287 *** `tab-stop-list' is now implicitly extended to infinity by repeating
288 the last step. Its default value is changed to nil, which means a tab
289 stop every `tab-width' columns.
292 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
293 When called in succession, it cycles between spacing conventions:
294 one space, no spaces, original spacing.
297 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
298 a line after a one-letter word, which is an error in some typographical
299 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
302 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
304 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
305 Most commands are still unaware of it, but kill/yank do work on the rectangle.
308 ** New option `visual-order-cursor-movement'.
309 If this is non-nil, cursor motion with arrow keys will follow the
310 visual order of characters on the screen: <left> always moves to the
311 left, <right> always moves to the right, disregarding the surrounding
312 bidirectional context.
317 *** All interactive commands that read a register (`copy-to-register', etc.)
318 now display a temporary window after `register-preview-delay' seconds
319 that summarizes existing registers. To disable this, set that option to nil.
320 Interactive commands that read registers and want to make use of this
321 should use `register-read-with-preview' to read register names.
324 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
327 *** New command `C-x r f' (`frameset-to-register').
328 See Changes in Emacs 24.4, above.
331 ** New command `delete-duplicate-lines'.
332 This searches the region for identical lines, and removes all but one
333 copy of each repeated line. The lines need not be sorted.
336 * Changes in Specialized Modes and Packages in Emacs 24.4
339 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
341 ~/.emacs.d/timelog replaces ~/.timelog
342 ~/.emacs.d/vip replaces ~/.vip
343 ~/.emacs.d/viper replaces ~/.viper
344 ~/.emacs.d/ido.last replaces ~/.ido.last
345 ~/.emacs.d/kkcrc replaces ~/.kkcrc
346 ~/.emacs.d/quickurls replaces ~/.quickurls
347 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
348 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
349 ~/.emacs.d/places replaces ~/.emacs-places
350 ~/.emacs.d/shadows replaces ~/.shadows
351 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
352 ~/.emacs.d/strokes replaces ~/.strokes
353 ~/.emacs.d/notes replaces ~/.notes
354 ~/.emacs.d/type-break replaces ~/.type-break
355 Also the following files used by the now obsolete otodo-mode.el:
356 ~/.emacs.d/todo-do replaces ~/.todo-do
357 ~/.emacs.d/todo-done replaces ~/.todo-done
358 ~/.emacs.d/todo-top replaces ~/.todo-top
360 ** Backtrace and debugger
362 *** The Lisp debugger's `e' command now includes the lexical environment
363 when evaluating the code in the context at point. Hence, it now lets
364 you access lexical variables.
367 *** New command `v' (`debugger-toggle-locals') displays local vars.
369 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
370 code run via JIT Lock.
373 ** Battery information can now be retrieved from BSD's `apm' utility.
376 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
378 ** Calendar and Diary
381 *** New faces `calendar-weekday-header', `calendar-weekend-header',
382 and `calendar-month-header'.
385 *** New option `calendar-day-header-array'.
388 *** New variable `diary-from-outlook-function', used by the command
389 `diary-from-outlook'.
392 *** The variable `calendar-font-lock-keywords' is obsolete.
397 *** Calc by default now uses the Gregorian calendar for all dates, and
398 uses January 1, 1 AD as its day number 1. Previously Calc used the
399 Julian calendar for dates before September 14, 1752, and it used
400 December 31, 1 BC as its day number 1; the new scheme is more
401 consistent with Calendar's calendrical system and day numbering.
404 *** The new option `calc-gregorian-switch' lets you configure if
405 (and when) Calc switches from the Julian to the Gregorian calendar.
408 *** Support for ISO 8601 dates.
414 **** The cpp-root project now supports executing a compile command.
415 It can be set through the new :compile-command slot or the
416 buffer-local variable `compile-command'.
418 **** Better selection of include directories for the 'linux' project.
419 Include directories now support out-of-tree build directories and
420 target architecture auto-detection.
424 **** Improved detection of used namespaces in current scope in C++.
426 **** Parsing of default values for variables and function arguments in C/C++.
427 They are also displayed by the summarize feature in the mode line.
429 **** Improved parsing of function pointers in C/C++.
430 This also includes parsing of function pointers as function arguments.
432 **** Parsing of C/C++ preprocessor macros that open new scope.
433 For example, this enables parsing of macros that open new namespaces.
435 **** Support for 'this' pointer in inline member functions in C++.
440 *** New macro `cl-tagbody'.
441 This executes statements while allowing for control transfer to labels.
444 *** letf is now just an alias for cl-letf.
448 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
449 Hence, you can now enable it independently from those modes, and from
450 `transient-mark-mode'.
453 *** `cua-highlight-region-shift-only' is now obsolete.
454 You can disable `transient-mark-mode' to get the same result.
456 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
461 *** Support for completion, ElDoc, and Flycheck has been added.
464 *** The current CFEngine syntax is parsed from "cf-promises -s json".
465 There is a fallback syntax available if you don't have cf-promises or
466 if your version doesn't support that option. See option `cfengine-cf-promises'.
469 ** Delete Selection mode can now be used without Transient Mark mode.
473 *** `desktop-auto-save-timeout' defines the number of seconds idle time
474 before auto-save of the desktop.
476 *** `desktop-restore-frames', enabled by default, allows saving and
477 restoring the frame/window configuration (frameset). Additional options
478 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
479 and `desktop-restore-forces-onscreen' offer further customization.
482 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
483 such as file ownership or permissions, are visible.
486 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
487 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
488 The results display in the mode line.
490 ** Electric Pair mode
492 *** New option `electric-pair-preserve-balance', enabled by default.
493 If non-nil, pairing/skipping only kicks in when that help the balance
494 of parentheses and quotes, i.e. the buffer should end up at least as
497 You can further control this behavior by adjusting the predicates
498 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
500 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
501 In `electric-pair-mode', the commands `backward-delete-char' and
502 `backward-delete-char-untabify' are now bound to electric variants
503 that delete the closer when invoked between adjacent pairs.
505 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
506 In `electric-pair-mode', inserting a newline between adjacent pairs
507 opens an extra newline after point, which is indented if
508 `electric-indent-mode' is also set.
510 *** New option `electric-pair-skip-whitespace', enabled by default.
511 This controls if skipping over closing delimiters should jump over any
512 whitespace slack. Setting it to `chomp' makes it delete this
513 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
515 *** New variables control the pairing in strings and comments.
516 You can customize `electric-pair-text-pairs' and
517 `electric-pair-text-syntax-table' to tweak pairing behavior inside
518 strings and comments.
520 ** New EPA option `epa-mail-aliases'.
521 You can set this to a list of alias expansions for keys to use
522 in `epa-mail-encrypt'.
524 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
525 that means: when one of the recipients of the message being encrypted
526 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
528 If one element of the variable's value is ("foo@bar.com"),
529 that means: when one of the recipients of the message being encrypted
530 is `foo@bar.com', ignore that name as regards encryption.
531 This is useful to avoid a query when you have no key for that name.
534 ** New ERC option `erc-accidental-paste-threshold-seconds'.
535 If set to a number, this can be used to avoid accidentally pasting large
536 amounts of data into the ERC input.
539 ** New ERT macro `skip-unless' allows skipping ERT tests.
540 See the ERT manual for details.
545 *** `eshell' now supports visual subcommands and options.
546 Eshell has been able to handle "visual" commands (interactive,
547 non-line oriented commands such as top that require display
548 capabilities not provided by eshell) by running them in an Emacs
549 terminal emulator. See `eshell-visual-commands'.
551 This feature has been extended to subcommands and options that make a
552 usually line-oriented command a visual command. Typical examples are
553 "git log" and "git <command> --help", which display their output in a
554 pager by default. See `eshell-visual-subcommands' and
555 `eshell-visual-options'.
558 *** New Eshell-Tramp module.
559 External su and sudo commands are now the default; the internal,
560 Tramp-using variants can still be used by enabling the eshell-tramp
564 ** New F90 mode option `f90-smart-end-names'.
566 ** Icomplete is a bit more like Ido.
568 *** Key bindings to navigate through and select the completions.
570 *** The icomplete-separator is customizable, and its default has changed.
572 *** Removed `icomplete-show-key-bindings'.
574 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
575 (setq icomplete-with-completion-tables '(internal-complete-buffer))
576 will revert to the old behavior.
581 *** An Ido user manual is now included.
584 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
585 This means to use virtual buffers if the current ido input does not match
589 *** The variable `ido-decorations' can optionally have two new elements,
590 which are the brackets to use around the sole remaining completion.
595 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
596 visit the next image file and the previous image file in the same
597 directory, respectively.
600 *** New commands to show specific frames of multi-frame images.
601 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
602 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
605 *** New commands to speed up, slow down, or reverse animation.
606 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
607 speed up and slow down the animation. `a r' (`image-reverse-speed')
608 to reverse it and `a 0' (`image-reset-speed') to reset it.
611 *** The command `image-mode-fit-frame' deletes other windows.
612 When toggling, it restores the frame's previous window configuration.
613 It also has an optional frame argument, which can be used by Lisp
614 callers to fit the image to a frame other than the selected frame.
618 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
619 will cycle through faces in `hi-lock-face-defaults' without prompting.
622 *** New global command `M-s h .' (`highlight-symbol-at-point')
623 highlights the symbol found near point without prompting,
624 using the next face automatically.
626 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
629 ** New Info face `info-index-match', used to highlight matches in index
630 entries displayed by `Info-index-next', `Info-virtual-index' and
636 *** New option `js-switch-indent-offset'.
639 *** Better indentation of multiple-variable declarations.
640 If a declaration spans several lines, variables on the following lines
641 are lined up to the first one.
644 *** Recognition and better indentation of continuations in array comprehensions.
647 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
652 *** Font locking for texinfo comments and new keywords.
654 *** Completion in Octave file buffers.
658 *** Jump to definition.
660 *** Documentation lookup/search.
663 ** OPascal mode is the new name for Delphi mode
666 *** All delphi-* variables and functions have been renamed to opascal-*.
667 Obsolete aliases exist for those likely to have been used externally.
670 *** The option `delphi-newline-always-indents' has been removed.
671 Use `electric-indent-mode' instead.
674 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
678 *** The format of `archive-contents' files, generated by package
679 repositories, has changed to allow a new (fifth) element in the data
680 vectors, containing an associative list with extra properties.
682 *** `describe-package' buffer uses the `:url' extra property to
683 display a `Homepage' header, if it's present.
685 *** In the buffer produced by `describe-package', there are now buttons
686 listing the keywords related to that package. You can click on them
687 to see other packages related to any given keyword.
689 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
690 the packages by a keyword.
693 ** In Prolog mode, `prolog-use-smie' has been removed,
694 along with the non-SMIE indentation code.
698 *** The new command `remember-notes' creates a buffer that is saved on
699 `kill-emacs'. You can think of it as a *scratch* buffer whose content
700 is preserved. In fact, it was designed as a replacement for *scratch*
701 buffer and can be used that way by setting `initial-buffer-choice' to
702 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
703 Without the second change, the *scratch* buffer will still be there
704 for notes that do not need to be preserved.
706 *** The Remember package can now store notes in separates files.
707 You can use the new function `remember-store-in-files' within the
708 `remember-handler-functions' option. See `remember-data-directory'
709 and `remember-directory-file-name-format' for new options related to
714 *** Customize `rmail-mbox-format' to influence some minor aspects of
715 how Rmail displays non-MIME messages.
718 *** The `unrmail' command now converts from BABYL to mboxrd format,
719 rather than mboxo. Customize `unrmail-mbox-format' to change this.
724 *** Improved syntax highlighting and indentation.
727 *** New `electric-indent-mode' integration.
730 *** New option `ruby-encoding-magic-comment-style'.
733 *** New option `ruby-custom-encoding-magic-comment-template'.
736 *** New option `ruby-align-to-stmt-keywords'.
739 *** New option `ruby-align-chained-calls'.
742 *** More Ruby file types have been added to `auto-mode-alist'.
744 ** Search and Replace
747 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
748 starts a symbol (identifier) incremental search forward with the
749 symbol found near point added to the search string initially.
752 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
753 and adds it to the search string.
755 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
756 between nil and the value of the option `search-invisible' (or `open'
759 *** `query-replace' skips invisible text when `search-invisible' is nil,
760 and opens overlays with hidden text when `search-invisible' is `open'.
763 *** A negative prefix arg of replacement commands replaces backward.
764 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
765 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
768 *** By default, prefix arguments do not now terminate Isearch mode.
769 Set `isearch-allow-prefix' to nil to restore old behavior.
772 *** More Isearch commands accept prefix arguments, namely
773 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
777 *** Word search now matches whitespace at the beginning/end
778 of the search string if it contains leading/trailing whitespace.
779 In an incremental word search or when using a non-nil LAX argument
780 of `word-search-regexp', the lax matching can also match part of
781 the first word (in addition to the lax matching of the last word).
782 The same rules are now applied to the symbol search with the difference
783 that it matches symbols, and non-symbol characters between symbols.
786 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
789 ** The shell.el option `explicit-bash-args' includes --noediting by default.
790 All non-ancient Bash versions support this option.
795 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
798 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
800 ** SMIE indentation can be customized via `smie-config'.
801 Emacs can learn the appropriate indentation settings if you provide it
802 with an indented sample file.
805 ** New Term mode option `term-suppress-hard-newline'.
808 ** Todo mode has been rewritten and enhanced.
809 The Todo mode user manual describes all commands and most user
810 options. To support some of these features, a new file format is
811 used, which is incompatible with the old format; however, you can
812 convert old todo and done item files to the new format on initializing
813 the first new todo file, or at any later time with the provided
814 conversion command. The previous version of todo-mode.el has been
815 renamed to otodo-mode.el and is now obsolete. New features include:
817 *** Support for multiple todo files and archive files of done items.
819 *** Renaming, reordering, moving, merging, and deleting categories.
821 *** Sortable tabular summaries of categories and the item types they contain.
823 *** Cross-category lists of items filtered by specific criteria.
825 *** More fine-grained interaction with the Emacs diary, by being able to
826 decide for each todo item whether it appears in the Fancy Diary display.
828 *** Highly flexible new item insertion and item editing.
830 *** Moving items between categories, storing done items in their category
831 or in archive files, undoing or unarchiving done items.
833 *** Reprioritizing items by inputting a numerical priority.
835 *** Extensive customizability of operation and display, including many faces.
840 *** `trace-function' and `trace-function-background' no longer prompt for
841 the output buffer. Unless you use a prefix argument, they output to
845 *** With a prefix argument, `trace-function' and `trace-function-background'
846 will prompt for a "context". This is a Lisp expression, whose value at the
847 time the function is entered/exited is printed along with the function's
853 *** The experimental url syntax for remote file names has been removed.
856 *** New connection method "adb", which allows to access Android
857 devices by the Android Debug Bridge. The variable `tramp-adb-program'
858 can be used to adapt the path of the "adb" program, if needed.
861 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
862 "scpc" and "rsyncc" are discontinued. The ssh option
863 "ControlMaster=auto" is set automatically in all ssh-based methods,
864 when possible. See `tramp-use-ssh-controlmaster-options'.
867 *** Handlers for `file-acl' and `set-file-acl' for remote machines
868 which support POSIX ACLs.
871 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
872 for remote machines which support filesystem notifications.
875 ** New URL command `url-cookie-list' displays the current cookies,
876 and allows you to interactively remove cookies.
878 ** VC and related modes
881 *** In VC directory mode, `D' displays diffs between VC-controlled
882 whole tree revisions.
885 *** In VC directory mode, `L' lists the change log for the current VC
886 controlled tree in a window.
889 *** In VC directory mode, `I' shows a log of changes that will be
890 received with a pull operation.
893 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
894 under current version control system. When called with a prefix
895 argument, you can remove a file from the ignored file list.
900 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
903 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
906 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
907 are obsolete. Customize the `woman-*' faces instead.
911 *** Iswitchb is made obsolete by icomplete-mode.
913 *** longlines.el is obsolete; use visual-line-mode instead.
919 *** terminal.el is obsolete; use term.el instead.
922 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
925 *** xesam.el is obsolete, because the XESAM project has been canceled.
928 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
931 *** The Info-edit command is obsolete. Editing Info nodes by hand
932 has not been relevant for some time.
935 * New Modes and Packages in Emacs 24.4
938 ** New package `eww' is a built-in web browser.
939 It is only available if Emacs is compiled with libxml2 support.
941 ** New minor mode `superword-mode'.
942 This overrides the default word motion commands to treat "symbol_words"
943 as a single word, similar to what `subword-mode' does.
946 ** New package nadvice.el offers lighter-weight advice facilities.
949 *** add-function/remove-function, which can be used to add/remove code on any
950 function-carrying place, such as process-filters or `<foo>-function' hooks.
952 *** advice-add/advice-remove to add/remove a piece of advice on a named
953 function, much like `defadvice' does.
955 ** New package frameset.el.
956 It provides a set of operations to save a frameset (the state of all
957 or a subset of the existing frames and windows, somewhat similar to a
958 frame configuration), both in-session and persistently, and restore it
959 at some point in the future.
962 ** New package filenotify.el provides an interface for file system
963 notifications. It requires that Emacs be compiled with one of the
964 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
967 * Incompatible Lisp Changes in Emacs 24.4
970 ** `kill-region' has lost its `yank-handler' optional argument.
973 ** `(input-pending-p)' no longer runs other timers that are ready to run.
974 The new optional CHECK-TIMERS parameter allows for the prior behavior.
977 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
980 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
981 Some languages match those as »...«, and others as «...», so it is
982 better for Emacs to stay neutral by default.
985 ** In compiled Lisp files, the header no longer includes a timestamp.
988 ** The default file coding for Emacs Lisp files is now utf-8.
989 (See `file-coding-system-alist'.) In most cases, this change is
990 transparent, but files that contain unusual characters without
991 specifying an explicit coding system may fail to load with obscure
992 errors. You should either convert them to utf-8 or add an explicit
996 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
997 It used to disable the minor mode, major mode, and text-property keymaps,
998 whereas now it simply has higher precedence.
1000 ** Default process filters and sentinels are not nil any more.
1001 Instead they default to a function that does what the nil value used to do.
1004 ** `read-event' does not return decoded chars in ttys any more.
1005 As was the case in Emacs 22 and before, the decoding of terminal
1006 input, according to `keyboard-coding-system', is not performed in
1007 `read-event' any more. But unlike in Emacs 22, this decoding is still
1008 done before input-decode-map, function-key-map, etc.
1011 ** The option `inhibit-local-menu-bar-menus' has been removed.
1014 ** Frame-local variables that affect redisplay do not work any more.
1015 More specifically, redisplay does not bother to check for a frame-local
1016 value when looking up variables.
1019 ** nil and "unbound" are indistinguishable in `symbol-function'.
1020 `symbol-function' does not signal a `void-function' error any more.
1021 To determine if a symbol's function definition is void, use `fboundp'.
1024 ** `defadvice' does not honor the `freeze' flag and cannot advise
1025 special-forms any more.
1028 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1029 when lexical binding is enabled. Previously, VAR was bound to nil,
1030 which often led to spurious unused-variable warnings.
1033 ** The return value of `backup-buffer' has changed.
1034 The second argument is no longer an SELinux context, instead it is an
1035 alist of extended attributes as returned by the new function
1036 `file-extended-attributes'. The attributes can be applied to another
1037 file using `set-file-extended-attributes'.
1040 ** By default `copy-file' no longer copies file permission bits to an
1041 existing destination; and it sets the file permission bits of a newly
1042 created destination to those of the source, masked by the default file
1043 permissions. To copy the file permission bits, pass t as the
1044 PRESERVE-PERMISSIONS argument of `copy-file'.
1047 ** `visited-file-modtime' now returns -1 for nonexistent files.
1048 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1049 in the presence of files with negative time stamps.
1052 ** The cars of the elements in `interpreter-mode-alist' are now
1053 treated as regexps rather than literal strings.
1056 * Lisp Changes in Emacs 24.4
1059 ** The second argument of `eval' can now specify a lexical environment.
1062 ** New functions `special-form-p' and `macrop'.
1064 ** New macro `define-alternatives' can be used to define generic commands.
1065 Generic commands are interactive functions whose implementation can be
1066 selected among several alternatives, as a matter of user preference.
1068 ** The `defalias-fset-function' property lets you catch `defalias'
1069 calls, and redirect them to your own function, instead of `fset'.
1072 ** New variable `enable-dir-local-variables'.
1073 Directory-local variables are ignored if this is nil. This may be
1074 useful for modes that want to ignore directory-locals while still
1075 respecting file-local variables.
1078 ** New function `get-pos-property'.
1080 ** Completion changes
1082 *** The separator for `completing-read-multiple' can now be a regexp.
1083 The default separator has been changed to allow surrounding spaces
1086 *** The `common-substring' arg of `display-completion-list' is obsolete.
1087 Either use `completion-all-completions', which returns highlighted
1088 strings (including for partial or substring completion), or call
1089 `completion-hilit-commonality' to add the highlight.
1091 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1092 let you enable symbol prettification (replacing a string like "lambda" with
1093 the Greek lambda character).
1098 *** Functions to pop up menus and dialogs now work on all terminals,
1099 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1100 `message-box', `yes-or-no-p', etc.
1102 The function `display-popup-menus-p' will now return non-nil for a
1103 display or frame whenever a mouse is supported on that display or
1106 *** New hook `tty-setup-hook'.
1110 *** New display action function `display-buffer-no-window' to not
1111 display the buffer in a window.
1113 *** New display action alist entry `allow-no-window' to indicate the
1114 caller of `display-buffer' is ready to handle the case of not
1115 displaying the buffer in a window.
1117 ** New hook `pre-redisplay-function'.
1120 ** New bool-vector set operation functions
1121 *** `bool-vector-exclusive-or'
1122 *** `bool-vector-union'
1123 *** `bool-vector-intersection'
1124 *** `bool-vector-set-difference'
1125 *** `bool-vector-not'
1126 *** `bool-vector-subsetp'
1127 *** `bool-vector-count-consecutive'
1128 *** `bool-vector-count-population'
1131 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1133 ** Error-handling changes
1136 *** New function `define-error'.
1139 *** `with-demoted-errors' takes an additional argument `format'.
1142 ** New macro `with-eval-after-load'.
1143 This is like the old `eval-after-load', but better behaved.
1146 ** New library subr-x.el with miscellaneous small utility functions
1147 *** `hash-table-keys'
1148 *** `hash-table-values'
1149 *** `string-blank-p'
1150 *** `string-empty-p'
1152 *** `string-reverse'
1153 *** `string-trim-left'
1154 *** `string-trim-right'
1156 *** `string-remove-prefix'
1157 *** `string-remove-suffix'
1160 ** Obsoleted functions
1163 *** `lisp-complete-symbol'
1164 *** `field-complete'
1165 *** `minibuffer-completion-contents'
1166 *** `isearch-nonincremental-exit-minibuffer'
1167 *** `isearch-filter-visible'
1168 *** `generic-make-keywords-list'
1169 *** `get-upcase-table' (use `case-table-get-table' instead).
1171 ** `with-wrapper-hook' is obsoleted by `add-function'.
1172 The few hooks that used with-wrapper-hook are replaced as follows:
1173 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1174 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1175 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1178 ** `byte-compile-interactive-only-functions' is now obsolete.
1179 To specify that a command should only be called interactively, give it
1180 a non-nil `interactive-only' property.
1183 ** `split-string' now takes an optional argument TRIM.
1184 The value, if non-nil, is a regexp that specifies what to trim from
1185 the start and end of each substring.
1188 ** New function `string-suffix-p'.
1190 ** File-handling changes
1193 *** Support for filesystem notifications.
1194 Emacs now supports notifications of filesystem changes, such as
1195 creation, modification, and deletion of files. This requires the
1196 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1197 MS-Windows systems, this is supported for Windows XP and newer
1201 *** The 9th element returned by `file-attributes' is now unspecified.
1202 Formerly, it was t if the file's gid would change if file were deleted
1203 and recreated. This value has been inaccurate for years on many
1204 platforms, and nobody seems to have noticed or cared.
1207 *** The 6th argument to `copy-file' has been renamed to
1208 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1209 Unix file permission bits as well as SELinux context.
1212 *** The function `file-ownership-preserved-p' now has an optional
1213 argument GROUP which causes it check for file group too. This can be
1214 used in place of the 9th element of `file-attributes'.
1217 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1218 argument, with the same interpretation as the returned value of
1219 `visited-file-modtime'.
1221 ** Autorevert changes
1224 *** If Emacs is compiled with file notification support, notifications
1225 are used instead of checking the time stamp of the files. You can
1226 disable this by setting the user option `auto-revert-use-notify' to
1227 nil. Alternatively, a regular expression of directories to be
1228 excluded from file notifications can be specified by
1229 `auto-revert-notify-exclude-dir-regexp'.
1232 *** The new user option `auto-revert-remote-files' enables reversion
1233 of remote files when set to non-nil.
1237 *** The function `face-spec-set' is now like `setq' for face specs.
1238 Its third arg now accepts values specifying a face spec type (defface,
1239 custom, or override spec), and the relevant spec is set accordingly.
1242 *** New function `add-face-text-property', which can be used to
1243 conveniently prepend/append new face properties.
1245 *** Face specs set via Custom themes now replace the `defface' spec
1246 rather than inheriting from it (as do face specs set via Customize).
1248 *** New face characteristic (supports :underline (:style wave))
1249 specifies whether or not the terminal can display a wavy line.
1252 *** New face spec attribute :distant-foreground
1253 specifies foreground to use if background color is near the foreground
1254 color that would otherwise have been used.
1259 *** `image-animated-p' is now `image-multi-frame-p'.
1260 It returns non-nil for any image that contains multiple frames,
1261 whether or not it specifies a frame delay.
1264 *** New variable `image-default-frame-delay' gives the frame delay for
1265 animated images which do not specify a frame delay.
1268 *** New functions `image-current-frame' and `image-show-frame' for getting
1269 and setting the current frame of a multi-frame image.
1274 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1275 **** object-name -> eieio-object-name
1276 **** object-class -> eieio-object-class
1277 **** object-class-fast -> eieio--object-class
1278 **** object-class-name -> eieio-object-class-name
1279 **** object-name-string -> eieio-object-name-string
1280 **** object-num-slots -> eieio--object-num-slots
1281 **** object-set-name-string -> eieio-object-set-name-string
1282 **** class-of -> eieio-object-class
1283 **** class-name -> eieio-class-name
1284 **** class-parent -> eieio-class-parent
1285 **** class-parents -> eieio-class-parents
1286 **** class-parents-fast -> eieio-class-parents-fast
1287 **** class-children -> eieio-class-children
1288 **** class-num-slots -> eieio--class-num-slots
1289 **** class-precedence-list -> eieio-class-precedence-list
1290 **** class-direct-subclasses -> eieio-class-children
1291 **** class-direct-superclasses -> eieio-class-parents
1293 ** Changes in encoding and decoding of text
1296 *** New coding-system `prefer-utf-8'.
1297 This is like `undecided' but prefers UTF-8 on decoding if the text to
1298 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1299 any non-ASCII characters are automatically encoded as UTF-8.
1302 *** New attributes of coding-systems whose type is `undecided'.
1303 Two new attributes, `:inhibit-null-byte-detection' and
1304 `:inhibit-iso-escape-detection', determine how to detect encoding of
1305 text that includes null bytes and ISO-2022 escape sequences,
1306 respectively. Each of these attributes can be either nil, zero, or
1307 t. If it is t, decoding text ignores null bytes and, respectively,
1308 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1309 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1310 text is encoded in one of the ISO-2022 encodings, such as
1311 iso-2022-7bit. If the value is zero, Emacs consults the variables
1312 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1314 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1315 UTF-8 encoding and decoding, whenever possible.
1317 These attributes are only meaningful for coding-systems of type
1318 `undecided'. (The type of a coding-system is determined by its
1319 `:coding-type' attribute and can be accessed by calling the
1320 `coding-system-type' function.)
1323 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1326 ** New functions `group-gid' and `group-real-gid'.
1329 ** The spelling of the rx.el category `chinese-two-byte' has been
1330 corrected (the first 'e' was missing).
1333 ** Minor internal changes to the details of lock files.
1334 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1335 If DIR/.#FILE already exists and is not an Emacs lock file,
1336 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1337 numbered lock files DIR/.#FILE.0...).
1338 On file systems that do not support symbolic links, the lock is now a
1339 regular file with contents being what would have been in the symlink.
1341 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1344 *** The package descriptor and name of global variables, constants,
1345 and functions should be separated by two hyphens if the symbol is not
1346 meant to be used by other packages.
1349 * Changes in Emacs 24.4 on Non-Free Operating Systems
1352 ** The procedure for building Emacs on MS-Windows has changed.
1353 It is now built by running the same configure script as on all other
1354 platforms. This requires the MSYS environment and MinGW development
1355 tools. See the updated instructions in nt/INSTALL for details.
1357 Using the Posix configure script and Makefile's also means a change in
1358 the directory structure of the Emacs installation on Windows. It is
1359 now the same as on GNU and Unix systems. In particular, the auxiliary
1360 programs, such as cmdproxy.exe and hexl.exe, are in
1361 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1362 version), version-independent site-lisp is in share/emacs/site-lisp,
1363 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1364 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1365 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1366 directories and will find the files in there automatically; there's no
1367 need to set any variables due to this change.)
1370 ** Emacs on Windows 2000 and later can now access files and directories
1371 whose names cannot be encoded in the current system codepage.
1373 The new variable `w32-unicode-filenames' controls this feature: if it
1374 is t, Emacs uses Unicode APIs to pass file names to system calls,
1375 which lifts the limitation of file names to the current locale.
1378 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1379 The backtrace is written to the 'emacs_backtrace.txt' file in the
1380 directory where Emacs was running.
1383 ** The variable `buffer-file-type' is no longer supported.
1384 Setting it has no effect, and %t in the mode-line format is ignored.
1385 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1386 modifying it has no effect.
1389 ** Lock files now work on MS-Windows.
1390 This helps to prevent losing your edits if the same file is being
1391 edited in another Emacs session or by another user. See the node
1392 "Interlocking" in the Emacs User Manual for the details. To disable
1393 file locking, customize `create-lockfiles' to nil.
1395 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1396 GNUstep and Mac OS X 10.4 use the old font backend.
1397 To use the old backend by default, do on the command line:
1398 % defaults write org.gnu.Emacs FontBackend ns
1400 ** Improved fullscreen support on Mac OS X.
1401 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1402 Customize `ns-use-native-fullscreen' to change the style.
1403 For Mac OS X 10.7 and newer, native is the default.
1405 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1406 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1407 does not apply to images.
1410 * Installation Changes in Emacs 24.3
1412 ** The default X toolkit is now Gtk+ version 3.
1413 If you don't pass `--with-x-toolkit' to configure, or if you use
1414 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1415 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1416 You can explicitly require a specific version by passing
1417 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1419 ** New configure option `--enable-link-time-optimization', to utilize
1420 an appropriate feature provided by GCC since version 4.5.0.
1422 ** New configure option `--without-all' to disable most of the optional
1423 features (image support, etc.) that are normally enabled by default.
1425 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1426 Emacs). If building with GCC, this enables compile-time checks that
1427 warn/give errors about possibly-questionable C code. On a recent GNU
1428 system there should be no warnings; on older and on non-GNU systems
1429 the results may be useful to developers.
1431 ** The configure option `--enable-use-lisp-union-type' has been
1432 renamed to `--enable-check-lisp-object-type', as the resulting
1433 Lisp_Object type no longer uses a union to implement the compile time
1434 check that this option enables.
1436 ** The configure option `--disable-maintainer-mode' has been removed,
1437 as it was confusingly-named and rarely useful.
1439 ** The configure options `--program-prefix', `--program-suffix', and
1440 `--program-transform-name' apply to more than just the installed
1441 binaries. Now they also affect the man pages, icons, and the
1442 etc/emacs.desktop file; but not the info pages, since this would break
1443 links between the various manuals.
1445 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1446 overwriting "emacs" in the installation bin/ directory with a link
1449 ** Emacs uses libtinfo in preference to libncurses, if available.
1451 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1452 /usr/pkg/lib to the linker search path. You must add them yourself if
1455 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1456 (from the bin and libexec directories, respectively). The former is
1457 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1460 * Startup Changes in Emacs 24.3
1462 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1463 lisp/ directory. There should not be any there anyway. If you have
1464 been adding them there, put them somewhere else; e.g., site-lisp.
1466 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1469 * Changes in Emacs 24.3
1473 *** `C-h f' (`describe-function') can now perform autoloading.
1474 When this command is called for an autoloaded function whose docstring
1475 contains a key substitution construct, that function's library is
1476 automatically loaded, so that the documentation can be shown
1477 correctly. To disable this, set `help-enable-auto-load' to nil.
1479 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1480 even after their associated libraries have been loaded (and the
1481 autoloads have been redefined as functions).
1485 *** Images displayed via ImageMagick now support transparency and the
1486 :background image specification property.
1488 *** When available, ImageMagick support is automatically enabled.
1489 It is no longer necessary to call `imagemagick-register-types'
1490 explicitly to install ImageMagick image types; that function is called
1491 automatically at startup, or when customizing an imagemagick- option.
1493 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1494 ImageMagick to view images. (You must call `imagemagick-register-types'
1495 afterwards if you do not use customize to change this.)
1497 *** The new variable `imagemagick-enabled-types' also affects which
1498 ImageMagick types are treated as images. The function
1499 `imagemagick-filter-types' returns the list of types that will be
1504 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1505 next and previous path separator, respectively.
1507 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1508 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1509 non-nil before enabling the mode.
1513 *** New option `mode-line-default-help-echo' specifies the help text
1514 (shown in a tooltip or in the echo area) for any part of the mode line
1515 that does not have its own specialized help text.
1517 *** You can now click mouse-3 in the coding system indicator to invoke
1518 `set-buffer-file-coding-system'.
1520 ** Server and client
1522 *** emacsclient now obeys string values for `initial-buffer-choice',
1523 if it is told to open a new frame without specifying any file to visit
1524 or expression to evaluate.
1526 *** New option `server-auth-key' specifies a shared server key.
1528 ** Emacs now generates backtraces on fatal errors.
1529 On encountering a fatal error, Emacs now outputs a textual description
1530 of the fatal signal, and a short backtrace on platforms like glibc
1531 that support backtraces.
1533 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1534 This minor mode replaces `toggle-read-only', which is now obsolete.
1536 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1537 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1538 respectively, without exiting from the prompt.
1540 ** In the Package Menu, newly-available packages are listed as "new",
1541 and sorted above the other "available" packages by default.
1543 ** If your Emacs was built from a repository checkout, the new variable
1544 `emacs-bzr-version' contains information about the bzr revision used.
1546 ** New option `create-lockfiles' specifies usage of lockfiles.
1547 It defaults to t. Changing it to nil inhibits the creation of lock
1548 files (use this with caution).
1550 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1551 variables on remote hosts.
1553 ** The entry for PCL-CVS has been removed from the Tools menu.
1554 The PCL-CVS commands are still available via the keyboard.
1556 ** Using "unibyte: t" in Lisp source files is obsolete.
1557 Use "coding: raw-text" instead.
1559 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1560 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1561 The previous binding, introduced in Emacs 24.1, was a mistake, because
1562 `C-c LETTER' bindings are reserved for user customizations.
1564 ** Internationalization
1566 *** New language environment: Persian.
1568 *** New input method `vietnamese-vni'.
1570 ** Nextstep (GNUstep / Mac OS X) port
1572 *** Support for fullscreen and the frame parameter fullscreen.
1574 *** A file dialog is used for open/save operations initiated from the
1578 * Editing Changes in Emacs 24.3
1580 ** Search and Replace
1582 *** Non-regexp Isearch now performs "lax" space matching.
1583 Each sequence of spaces in the supplied search string may match any
1584 sequence of one or more whitespace characters, as specified by the
1585 variable `search-whitespace-regexp'. (This variable is also used by a
1586 similar existing feature for regexp Isearch.)
1588 *** New Isearch command `M-s SPC' toggles lax space matching.
1589 This applies to both ordinary and regexp Isearch.
1591 *** New option `replace-lax-whitespace'.
1592 If non-nil, `query-replace' uses flexible whitespace matching too.
1595 *** Global `M-s _' starts a symbol (identifier) incremental search,
1596 and `M-s _' in Isearch toggles symbol search mode.
1597 `M-s c' in Isearch toggles search case-sensitivity.
1599 ** Navigation commands
1601 *** New binding `M-g c' for `goto-char'.
1603 *** New binding `M-g TAB' for `move-to-column'.
1605 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1606 interactively with no prefix arg. Previously, it moved to column 1.
1608 ** New option `yank-handled-properties' allows processing of text
1609 properties on yanked text, in ways that are more general than just
1610 removing them (as is done by `yank-excluded-properties').
1612 ** New option `delete-trailing-lines' specifies whether
1613 M-x delete-trailing-whitespace should delete trailing lines at the end
1614 of the buffer. It defaults to t.
1616 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1618 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1619 `ucs-insert' is now an obsolete alias for `insert-char'.
1621 ** The `z' key no longer has a binding in most special modes.
1622 It used to be bound to `kill-this-buffer', but `z' is too easy to
1625 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1626 It copies the region-rectangle as the last rectangle kill.
1630 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1632 *** New option `register-separator' specifies the register containing
1633 the text to put between collected texts for use with
1634 M-x append-to-register and M-x prepend-to-register.
1637 * Changes in Specialized Modes and Packages in Emacs 24.3
1639 ** Common Lisp emulation (CL)
1641 *** CL's main entry is now (require 'cl-lib).
1642 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1643 i.e., all its definitions have the "cl-" prefix (and internal definitions
1644 use the "cl--" prefix).
1646 If `cl' provided a feature under the name `foo', then `cl-lib'
1647 provides it under the name `cl-foo' instead; with the exceptions of the
1648 few `cl' definitions that had to use `foo*' to avoid conflicts with
1649 pre-existing Elisp entities. These have been renamed to `cl-foo'
1650 rather than `cl-foo*'.
1652 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1653 provide the old, non-prefixed names. Some exceptions are listed below:
1655 *** `cl-flet' is not like `flet' (which is deprecated).
1656 Instead it obeys the behavior of Common-Lisp's `flet'.
1657 In particular, in cl-flet function definitions are lexically scoped,
1658 whereas in flet the scoping is dynamic.
1660 *** `cl-labels' is slightly different from `labels'.
1661 The difference is that it relies on the `lexical-binding' machinery
1662 (as opposed to the `lexical-let' machinery used previously) to capture
1663 definitions in closures, so such closures will only work if `lexical-binding'
1666 *** `cl-letf' is not exactly like `letf'.
1667 The only difference is in details that relate to some deprecated usage
1668 of `symbol-function' in place forms.
1670 *** `progv' was rewritten to use the `let' machinery.
1671 A side effect is that variables without corresponding values are bound
1672 to nil rather than being made unbound.
1674 *** The following methods of extending `setf' are obsolete
1675 (use features from gv.el instead):
1676 `define-modify-macro' (use `gv-letplace')
1677 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1678 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1679 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1683 *** Changes are now highlighted using the same color scheme as in
1684 modern VCSes. Deletions are displayed in red (new faces
1685 `diff-refine-removed' and `smerge-refined-removed', and new definition
1686 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1687 and `smerge-refined-added', and new definition of `diff-added').
1689 *** The variable `diff-use-changed-face' defines whether to use the
1690 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1691 changes in context diffs.
1693 *** The new command `diff-delete-trailing-whitespace' removes trailing
1694 whitespace introduced by a diff.
1696 ** Ediff now uses the same color scheme as Diff mode.
1700 A new version of python.el, which provides several new features, including:
1701 per-buffer shells, better indentation, Python 3 support, and improved
1702 shell-interaction compatible with iPython (and virtually any other
1705 *** Some user options have been replaced/renamed, including (old -> new):
1706 **** python-indent -> python-indent-offset
1707 **** python-guess-indent -> python-indent-guess-indent-offset
1708 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1709 **** python-use-skeletons -> python-skeleton-autoinsert
1711 *** Some user options have been removed, including:
1713 **** `python-indent-string-contents': Strings are never indented.
1715 **** `python-honour-comment-indentation':
1716 Comments are always considered as indentation markers.
1718 **** `python-continuation-offset': Indentation is automatically
1719 calculated in a pep8 compliant way depending on the context.
1721 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1722 Have no direct mapping as the shell interaction is completely different.
1724 **** `python-python-command', `python-jython-command':
1725 Replaced by `python-shell-interpreter'.
1727 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1728 `python-pdbtrack-minor-mode-string', `python-source-modes':
1731 *** Some commands have been replaced (old -> new):
1732 **** python-insert-class -> python-skeleton-class
1733 **** python-insert-def -> python-skeleton-def
1734 **** python-insert-for -> python-skeleton-for
1735 **** python-insert-if -> python-skeleton-if
1736 **** python-insert-try/except -> python-skeleton-try
1737 **** python-insert-try/finally -> python-skeleton-try
1738 **** python-insert-while -> python-skeleton-while
1739 **** python-find-function -> python-nav-jump-to-defun
1740 **** python-next-statement -> python-nav-forward-sentence
1741 **** python-previous-statement -> python-nav-backward-sentence
1742 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1743 **** python-end-of-defun-function -> python-nav-end-of-defun
1744 **** python-send-buffer -> python-shell-send-buffer
1745 **** python-send-defun -> python-shell-send-defun
1746 **** python-send-region -> python-shell-send-region
1747 **** python-send-region-and-go -> emulate with python-shell-send-region
1748 and python-shell-switch-to-shell
1749 **** python-send-string -> python-shell-send-string
1750 **** python-switch-to-python -> python-shell-switch-to-shell
1751 **** python-describe-symbol -> python-eldoc-at-point
1755 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1757 *** The D-Bus object manager interface is implemented.
1759 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1760 if their value does not fit into Emacs's integer range.
1762 *** The function `dbus-call-method' is now non-blocking.
1763 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1765 *** Signals can also be sent as unicast messages.
1767 *** The argument list of `dbus-register-signal' has been extended,
1768 according to the new match rule types of D-Bus.
1770 *** `dbus-init-bus' supports private connections.
1772 *** There is a new function `dbus-setenv'.
1774 ** `desktop-path' no longer includes the "." directory.
1775 Desktop files are now located in ~/.emacs.d by default.
1779 *** `dired-do-async-shell-command' executes each file sequentially
1780 if the command ends in `;' (when operating on multiple files).
1781 Otherwise, it executes the command on each file in parallel.
1783 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1784 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1787 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1788 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1789 mark/unmark/flag all files in the active region.
1791 *** The minibuffer default for `=' (`dired-diff') has changed.
1792 It is now the backup file for the file at point, if one exists.
1793 In Transient Mark mode the default is the file at the active mark.
1795 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1796 The global binding for `M-=', `count-words-region' is in effect.
1800 *** New module "notifications", which can send a notification when you
1801 receive a private message or your nickname is mentioned.
1803 *** ERC will look up server/channel names via auth-source and use any
1806 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1807 only applies to messages sent by lurkers.
1809 ** reStructuredText mode
1811 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1812 fontification, comment handling, and customization have all been revised
1815 *** Support for `imenu' and `which-function-mode'.
1817 *** The reStructuredText syntax is more closely covered.
1818 Sphinx support has been improved.
1820 *** `rst-insert-list' inserts new list or continues existing lists.
1822 *** A negative prefix argument always works for `rst-adjust'.
1824 *** The window configuration is reset after displaying a TOC.
1826 *** The constant `rst-version' describes the rst.el package version.
1830 *** Support for percent literals and recognition of regular expressions
1831 in method calls without parentheses with more methods, including Cucumber
1834 *** Improved syntax highlighting and indentation.
1836 *** New command `ruby-toggle-block', bound to `C-c {'.
1838 *** Some non-standard keybindings/commands have been removed:
1840 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1842 **** `ruby-mark-defun'; use `mark-defun'.
1844 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1845 appropriate settings for the variables `beginning-of-defun-function'
1846 and `end-of-defun-function'.
1848 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1849 `reindent-then-newline-and-indent' and `newline' have been removed.
1851 ** Shell Script mode
1853 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1855 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1857 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1861 *** The free software compiler GHDL is supported (and now the default).
1863 *** Support for the VHDL-AMS packages has been added/updated.
1865 *** Updated to the 2002 revision of the VHDL standard.
1867 *** Accepts \r and \f as whitespace.
1871 *** The faces used by Apropos are now directly customizable.
1872 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1873 see the `apropos' Custom group for details.
1875 *** The old options whose values specified faces to use have been removed
1876 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1880 *** This package has been rewritten to use Tabulated List mode.
1882 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1883 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1887 *** Algebraic simplification mode is now the default.
1888 To restrict to the limited simplifications given by the former
1889 default simplification mode, use `m I'.
1893 *** You can customize the header text that appears above each calendar month.
1894 See the variable `calendar-month-header'.
1896 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1898 *** The calendars produced by cal-html include holidays.
1899 Customize `cal-html-holidays' to change this.
1903 *** The major modes from the parser generators "Bovine" and "Wisent"
1904 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1905 are in `auto-mode-alist', and the corresponding manuals are included.
1909 **** Menu support for the "Configuration" feature. This allows users to
1910 choose the active configuration (such as debug or install) from the menu.
1912 **** New command `ede-set' to interactively set project-local variables.
1914 **** Support for compiling, debugging, and running in "generic" projects.
1916 **** Autoconf editing support for M4 macros with complex arguments.
1918 **** Compilation support for the "linux" project type.
1920 **** "simple" projects have been removed; use "generic" projects instead.
1924 **** Support for parsing #include statements inside a namespace in C/C++.
1926 **** Improved support for 'extern "C"' declarations in C/C++.
1928 **** The ability to ignore more common special C/C++ preprocessor symbols,
1929 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1930 If available, include cdefs.h as an additional source of preprocessor symbols.
1932 **** Improved C/C++ function pointer parsing.
1934 **** In Python, support for converting imports to include file names.
1936 **** Ability to dynamically determine the Python load path.
1938 **** Support for the Python 'WITH' and 'AT' keywords.
1940 **** Improved tooltip completion.
1944 **** The SRecode manual is now included.
1946 **** Tag generation supports constructor/destructor settings and system
1947 include differentiation.
1949 **** Addition of 'Framework' support: Frameworks are specified when a
1950 particular kind of library (such as Android) is needed in a common language
1953 **** Support for nested templates and let variables override based on priority.
1955 **** Support for merging tables from multiple related modes, such as
1956 default -> c++ -> arduino.
1958 ** Compile has a new option `compilation-always-kill'.
1962 *** `custom-reset-button-menu' now defaults to t.
1964 *** Non-option variables are never matched in `customize-apropos' and
1965 `customize-apropos-options' (i.e., the prefix argument does nothing for
1966 these commands now).
1970 *** The variables `term-default-fg-color' and `term-default-bg-color'
1971 are now deprecated in favor of the customizable face `term'.
1973 *** You can customize how to display ANSI terminal colors and styles
1974 by customizing the corresponding `term-color-<COLOR>',
1975 `term-color-underline' and `term-color-bold' faces.
1979 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1981 *** Remote processes are now also supported on remote MS-Windows hosts.
1985 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1986 Previously, this slot stored semicolon-separated attribute-value pairs
1987 appended to some imap URLs, but this is not compatible with RFC 3986.
1988 So now the `filename' slot stores the entire path and query components,
1989 and the `attributes' slot is always nil.
1991 *** New function `url-encode-url' for encoding a URI string.
1992 The `url-retrieve' function now uses this to encode its URL argument,
1993 in case that is not properly encoded.
1995 ** notifications.el supports now version 1.2 of the Notifications API.
1996 The function `notifications-get-capabilities' returns the supported
1999 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2000 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2001 `flymake-warning-bitmap'.
2003 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2004 specifying URL types that should be converted to remote file names at
2005 the FFAP prompt. The default is now '("ftp").
2007 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2008 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2010 ** New option `mouse-avoidance-banish-position' specifies where the
2011 `banish' mouse avoidance setting moves the mouse.
2013 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2014 closing brackets to be aligned with the line of the opening bracket.
2016 ** In Proced mode, new command `proced-renice' renices marked processes.
2018 ** New option `async-shell-command-buffer' specifies the buffer to use
2019 for a new asynchronous `shell-command' when the default output buffer
2020 `*Async Shell Command*' is already in use.
2022 ** SQL mode has a new option `sql-db2-escape-newlines'.
2023 If non-nil, newlines sent to the command interpreter will be escaped
2024 by a backslash. The default does not escape the newlines and assumes
2025 that the sql statement will be terminated by a semicolon.
2027 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2028 (and modes that derive from it), sorts the column at point, or the Nth
2029 column if a numeric prefix argument is given.
2031 ** `which-func-modes' now defaults to t, so Which Function mode, when
2032 enabled, applies to all applicable major modes.
2034 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2037 ** Follow mode no longer works by using advice.
2038 The option `follow-intercept-processes' has been removed.
2040 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2042 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2043 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2044 *** semantic-change-hooks -> semantic-change-functions
2045 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2046 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2047 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2048 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2049 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2050 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2051 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2052 *** rcirc-activity-hooks -> rcirc-activity-functions
2053 *** rcirc-print-hooks -> rcirc-print-functions
2054 *** dbus-event-error-hooks -> dbus-event-error-functions
2055 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2056 *** checkdoc-style-hooks -> checkdoc-style-functions
2057 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2058 *** archive-extract-hooks -> archive-extract-hook
2059 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2060 *** hfy-post-html-hooks -> hfy-post-html-hook
2061 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2062 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2063 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2064 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2066 ** Obsolete packages
2069 In most cases, assoc+member+push+delq work just as well.
2070 And in any case it's just a terrible package: ugly semantics, terrible
2071 inefficiency, and not namespace-clean.
2080 * Incompatible Lisp Changes in Emacs 24.3
2082 ** Docstrings starting with `*' no longer indicate user options.
2083 Only variables defined using `defcustom' are considered user options.
2084 The function `user-variable-p' is now an obsolete alias for
2085 `custom-variable-p'.
2087 ** The return values of `defalias', `defun' and `defmacro' have changed,
2088 and are now undefined. For backwards compatibility, `defun' and
2089 `defmacro' currently return the name of the newly defined
2090 function/macro, but this should not be relied upon.
2092 ** `random' by default now returns a different random sequence in
2093 every Emacs run. Use `(random S)', where S is a string, to set the
2094 random seed to a value based on S, in order to get a repeatable
2095 sequence in later calls.
2097 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2098 that substring is inserted literally even if the LITERAL arg is
2099 non-nil, instead of causing an error to be signaled.
2101 ** `select-window' now always makes the window's buffer current.
2102 It does so even if the window was selected before.
2104 ** The function `x-select-font' can return a font spec, instead of a
2105 font name as a string. Whether it returns a font spec or a font name
2106 depends on the graphical library.
2108 ** `face-spec-set' no longer sets frame-specific attributes when the
2109 third argument is a frame (that usage was obsolete since Emacs 22.2).
2111 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2113 ** The CL package's `get-setf-method' function no longer exists.
2114 Generalized variables are now part of core Emacs Lisp, and implemented
2115 differently to the way cl.el used to do it. It is not possible to
2116 define a compatible replacement for `get-setf-method'. See the file
2117 gv.el for internal details of the new implementation.
2119 ** The arguments of `dbus-register-signal' are no longer just strings,
2120 but keywords or keyword-string pairs. The old argument list will
2121 still be supported for Emacs 24.x.
2123 ** Miscellaneous name changes
2124 Some Lisp symbols have been renamed to correct their spelling,
2125 or to be more consistent with standard Emacs terminology.
2127 *** Renamed functions
2128 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2129 **** inactivate-input-method -> deactivate-input-method
2130 **** quail-inactivate -> quail-deactivate
2131 **** robin-inactivate -> robin-deactivate
2132 **** viper-inactivate-input-method -> viper-deactivate-input-method
2133 **** viper-inactivate-input-method-action ->
2134 viper-deactivate-input-method-action
2135 **** ucs-input-inactivate -> ucs-input-deactivate
2138 The old hooks are still supported for backward compatibility, but they
2139 are deprecated and will be removed eventually.
2140 **** input-method-inactivate-hook -> input-method-deactivate-hook
2141 **** robin-inactivate-hook -> robin-deactivate-hook
2142 **** quail-inactivate-hook -> quail-deactivate-hook
2144 *** Renamed variables
2145 **** follow-deactive-menu -> follow-inactive-menu
2146 **** inactivate-current-input-method-function ->
2147 deactivate-current-input-method-function
2149 ** Some obsolete functions, variables, and faces have been removed:
2150 *** `last-input-char', `last-command-char', `unread-command-char'
2151 *** `facemenu-unlisted-faces'
2152 *** `rmail-decode-mime-charset'
2153 *** `iswitchb-read-buffer'
2154 *** `sc-version', `sc-submit-bug-report'
2155 *** `set-char-table-default'
2156 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2157 *** `compile-internal'
2159 *** `mode-line-inverse-video'
2160 *** `follow-mode-off-hook'
2161 *** `cvs-commit-buffer-require-final-newline'
2162 (use `log-edit-require-final-newline' instead)
2163 *** `cvs-changelog-full-paragraphs'
2164 (use `log-edit-changelog-full-paragraphs' instead)
2165 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2166 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2167 *** `vc-master-templates' (use `vc-handled-backends' instead)
2168 *** `vc-checkout-carefully'
2171 * Lisp Changes in Emacs 24.3
2173 ** CL-style generalized variables are now in core Elisp.
2174 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2175 You can define your own generalized variables using `gv-define-simple-setter',
2176 `gv-define-setter', etc.
2178 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2179 This can significantly speed up execution of non-byte-compiled code,
2180 but can also bump into previously unnoticed cyclic dependencies.
2181 These are generally harmless: they will simply cause the macro calls
2182 to be left for later expansion (as before), but will result in a
2183 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2184 You may wish to restructure your code so this does not happen.
2186 ** New sampling-based Elisp profiler.
2187 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2188 When finished, use M-x profiler-stop. The sampling rate can be based on
2189 CPU time or memory allocations.
2191 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2192 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2194 ** New macros `setq-local' and `defvar-local'.
2196 ** Face underlining can now use a wave.
2198 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2199 of `read-regexp' accepts a string ending with a colon and space, and its
2200 second argument DEFAULTS can be a list of strings accessible via `M-n'
2201 in the minibuffer ahead of other hard-coded useful regexp-related values.
2202 More commands use `read-regexp' now to read their regexp arguments.
2206 *** New function `completion-table-with-quoting' to handle completion
2207 in the presence of quoting, such as file completion in shell buffers.
2209 *** New function `completion-table-subvert' to use an existing completion
2210 table, but with a different prefix.
2214 *** New error type and new function `user-error'.
2215 These do not trigger the debugger.
2217 *** New option `debugger-bury-or-kill', saying what to do with the
2218 debugger buffer when exiting debug.
2220 *** Set `debug-on-message' to enter the debugger when a certain
2221 message is displayed in the echo area. This can be useful when trying
2222 to work out which code is doing something.
2224 *** New var `inhibit-debugger', automatically set to prevent accidental
2225 recursive invocations.
2229 *** New command `fit-frame-to-buffer' adjusts the frame height to
2232 *** The command `fit-window-to-buffer' can adjust the frame height
2233 if the new option `fit-frame-to-buffer' is non-nil.
2235 *** New macro `with-temp-buffer-window', similar to
2236 `with-output-to-temp-buffer'.
2238 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2241 *** New option `switch-to-buffer-preserve-window-point' to restore a
2242 window's point when switching buffers.
2244 *** New display action alist entries `window-height' and `window-width'
2245 specify the size of new windows created by `display-buffer'.
2247 *** New display action alist entry `pop-up-frame-parameters', if
2248 non-nil, specifies frame parameters to give any newly-created frame.
2250 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2251 tells display action functions to avoid changing which frame is
2254 *** New display action alist entry `previous-window', if non-nil,
2255 specifies window to reuse in `display-buffer-in-previous-window'.
2257 *** New display action functions `display-buffer-below-selected',
2258 and `display-buffer-in-previous-window'.
2260 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2261 now accept a third argument to avoid choosing the selected window.
2263 *** Additional values recognized for option `window-combination-limit'.
2265 *** The following variables are obsolete, as they can be replaced by
2266 appropriate entries in the `display-buffer-alist' function introduced
2268 **** `dired-shrink-to-fit'
2269 **** `display-buffer-reuse-frames'
2270 **** `display-buffer-function'
2271 **** `special-display-buffer-names'
2272 **** `special-display-frame-alist'
2273 **** `special-display-function'
2274 **** `special-display-regexps'
2278 *** `current-time-string' no longer requires that its argument's year
2279 must be in the range 1000..9999. It now works with any year supported
2280 by the underlying C implementation.
2282 *** `current-time' now returns extended-format time stamps
2283 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2284 PSEC is typically a multiple of 1000 on current machines. Other
2285 functions that use this format, such as `file-attributes' and
2286 `format-time-string', have been changed accordingly. Old-format time
2287 stamps are still accepted.
2289 *** The format of timers in `timer-list' and `timer-idle-list' is now
2290 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2291 The PSECS slot is new, and uses picosecond resolution. It can be
2292 accessed via the new `timer--psecs' accessor.
2294 *** Last-modified time stamps in undo lists now are of the form
2295 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2299 *** Improved security when handling persistent objects:
2301 **** `eieio-persistent-read' now features optional arguments for specifying
2302 the class to load, as well as a flag stating whether subclasses are allowed;
2303 if provided, other classes will be rejected by the reader. For
2304 compatibility with existing code, if the class is omitted only a
2307 **** New specialized reader for pulling in classes and signaling errors
2308 without evaluation of suspicious code.
2310 **** All slots that contain objects must have a :type. Slots with lists
2311 of objects must use a new type predicate for a list of an object type.
2313 *** Support for `find-function' and similar utilities, through the addition
2314 of filename support to generated symbols.
2316 ** Floating point functions now always return special values like NaN,
2317 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2318 Previously, they returned NaNs on some platforms but signaled errors
2319 on others. The affected functions are acos, asin, tan, exp, expt,
2320 log, log10, sqrt, and mod.
2322 ** New fringe bitmap `exclamation-mark'.
2324 ** Miscellaneous changes to special forms and macros
2326 *** `defun' and `defmacro' are now macros rather than special forms.
2328 *** `kbd' is now a function rather than a macro.
2330 ** Miscellaneous new functions
2332 *** `set-temporary-overlay-map' sets up a temporary keymap that
2333 takes precedence over most other maps for a short while (normally one key).
2335 *** `autoloadp' tests if its argument is an autoloaded object.
2337 *** `autoload-do-load' performs the autoloading operation.
2339 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2341 *** `file-name-base' returns a file name sans directory and extension.
2343 *** `function-get' fetches a function property, following aliases.
2345 *** `posnp' tests if an object is a `posn'.
2347 *** `system-users' returns the user names on the system.
2349 *** `system-groups' returns the group names on the system.
2351 *** `tty-top-frame' returns the topmost frame of a text terminal.
2353 ** The following functions and variables are obsolete:
2354 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2355 *** `buffer-has-markers-at'
2356 *** `macro-declaration-function' (use `macro-declarations-alist')
2357 *** `window-system-version' (provides no useful information)
2358 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2359 *** `query-replace-interactive'
2360 *** `font-list-limit' (has had no effect since Emacs < 23)
2363 * Changes in Emacs 24.3 on Non-Free Operating Systems
2365 ** Cygwin builds can use the native MS Windows user interface.
2366 Pass `--with-w32' to configure. The default remains the X11 interface.
2368 ** Two new functions are available in Cygwin builds:
2369 `cygwin-convert-file-name-from-windows' and
2370 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2371 code to access the Cygwin file-name mapping machinery to convert
2372 between Cygwin and Windows-native file and directory names.
2374 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2375 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2376 `mouse-autoselect-window'.
2378 ** On MS Windows Vista and later Emacs now supports symbolic links.
2380 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2381 support for libxml2, even if its presence is detected.
2383 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2385 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2386 directories to the search path. You must add them yourself if you want them.
2389 * Changes in Emacs 24.2
2391 ** This is mainly a bug-fix release.
2394 * Installation Changes in Emacs 24.1
2396 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2397 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2398 also depend on Gtk+. You can disable them with --without-rsvg and
2401 ** Emacs can be compiled with GnuTLS support.
2402 This happens by default if a suitably recent version of the library is
2403 found at build time. To prevent this, use the configure option
2404 `--without-gnutls'. See below for GnuTLS features.
2406 ** Emacs can be compiled with SELinux support.
2407 This happens by default if a suitably recent version of the library is
2408 found at build time. To prevent this, use the configure option
2409 `--without-selinux'. See below for SELinux features.
2411 ** Emacs can be compiled with ImageMagick support.
2412 This happens by default if a suitably recent version of the library is
2413 found at build time. To prevent this, use the configure option
2414 `--without-imagemagick'. See below for ImageMagick features.
2415 This feature is not available for the Nextstep or MS ports.
2417 ** Emacs can be compiled with libxml2 support.
2418 This happens by default if a suitably recent version of the library is
2419 found at build time. To prevent this, use the configure option
2420 `--without-xml2'. See below for libxml2 features.
2422 ** By default, the installed Info and man pages are compressed.
2423 You can disable this by configuring --without-compress-info.
2425 ** New configure option --with-wide-int.
2426 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2427 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2430 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2431 These provide no new functionality, they just remove the need to edit
2432 lib-src/Makefile by hand in order to use the associated features.
2434 ** New configure option --enable-use-lisp-union-type.
2435 This is only useful for Emacs developers to debug certain types of bugs.
2436 This is not a new feature; only the configure flag is new.
2438 ** The standalone programs digest-doc and sorted-doc are removed.
2439 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2441 ** The standalone program `fakemail' is removed.
2442 If you need it, feedmail.el provides a superset of the functionality.
2445 * Startup Changes in Emacs 24.1
2447 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2448 command line arguments, and the EMACS_UNIBYTE environment variable, no
2449 longer have any effect. (They were declared obsolete in Emacs 23.)
2451 ** New command line option `--no-site-lisp' removes site-lisp directories
2452 from load-path. -Q now implies this. This option does not affect the
2453 EMACSLOADPATH environment variable (and hence has no effect for
2457 * Changes in Emacs 24.1
2461 *** Many packages now use the `completion-at-point' command,
2462 rather than implementing separate completion commands.
2464 *** `completion-at-point' now handles tags and semantic completion.
2466 *** Completion in a non-minibuffer now tries to detect the end of completion
2467 and pops down the *Completions* buffer accordingly.
2469 *** New option `completion-cycle-threshold' allows completion cycling.
2471 *** New option `completion-category-overrides' for overriding the
2472 default completion style in certain circumstances.
2474 *** New completion style `substring'.
2476 *** Completion of buffer names uses `substring' completion by default.
2478 *** The option `widget-complete-field' has been removed.
2482 *** The first time you try sending mail, Emacs asks for a mail method.
2483 This is implemented by a new default for `send-mail-function', which
2484 is `sendmail-query-once'. This offers to use the smtpmail package, or
2485 to use the old defaults relying on external mail facilities
2486 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2487 `mailclient-send-it' on Windows).
2489 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2490 transfers the report to your desktop's preferred mail client, if there
2491 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2494 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2495 and Mail mode changes
2497 ** Emacs server and client changes
2499 *** New option `server-port' specifies the port for TCP Emacs servers.
2501 *** New emacsclient argument -q/--quiet suppresses some status messages.
2503 *** New emacsclient argument --frame-parameters specifies the frame
2504 parameters of any newly-created graphical frame.
2506 *** If emacsclient shuts down due to Emacs signaling an error,
2507 its exit status is 1.
2509 *** New emacsclient argument --parent-id ID.
2510 This opens a client frame in parent X window ID, via XEmbed, similar
2511 to the --parent-id argument to Emacs.
2513 ** Internationalization changes
2515 *** Emacs now supports display and editing of bidirectional text.
2516 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2517 displayed in the correct visual order as expected by users of those
2518 scripts. The display reordering is a "full bidirectionality" class
2519 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2520 with no RTL text should look exactly the same as before.
2522 **** New buffer-local variable `bidi-display-reordering'.
2523 To disable display reordering in a buffer, change this to nil.
2525 **** New buffer-local variable `bidi-paragraph-direction'.
2526 If nil (the default), Emacs determines the base direction of each
2527 paragraph from its text, as specified by the UBA. Setting the value
2528 to `right-to-left' or `left-to-right' forces a base direction on each
2531 Paragraphs with right-to-left base direction are displayed starting at
2532 the right window edge.
2534 *** Enhanced support for characters with no glyphs in available fonts,
2535 or, on text terminals, characters that cannot be encoded by the
2536 terminal coding system. The new option `glyphless-char-display-control'
2537 specifies how to display them: as a hexadecimal code in a box, a thin
2538 1-pixel space, an empty box, etc.
2540 *** New input methods for Farsi and Bulgarian
2541 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2543 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2544 (U+2010 and U+2011).
2546 *** New Hebrew translation of the Emacs Tutorial.
2547 Type `C-u C-h t' to choose it in case your language setup doesn't
2548 automatically select it.
2550 ** An Emacs Lisp package manager is now included.
2551 This is a convenient way to download and install additional packages,
2552 from a package repository at http://elpa.gnu.org.
2554 *** M-x list-packages shows a list of packages, which can be
2555 selected for installation.
2557 *** New command `describe-package', bound to `C-h P'.
2559 *** By default, all installed packages are loaded automatically when
2560 Emacs starts up. To disable this, set `package-enable-at-startup' to
2561 nil. To specify the packages to load, customize `package-load-list'.
2563 ** Custom theme changes
2565 *** New command `M-x customize-themes', which provides a convenient
2566 interface for enabling and disabling Custom themes.
2568 *** New option `custom-theme-load-path' is the load path for themes.
2569 Emacs no longer looks for Custom themes in `load-path'. The default
2570 value of `custom-theme-load-path' says to look for themes in
2571 `custom-theme-directory', followed by a subdirectory of
2572 `data-directory' named "themes/", which contains a small selection of
2573 built-in Custom themes.
2575 *** New option `custom-safe-themes' records known-safe theme files.
2576 If a theme is not in this list, Emacs queries before loading it, and
2577 offers to save the theme to `custom-safe-themes' automatically. By
2578 default, all themes included in Emacs are treated as safe.
2580 ** Improved GTK integration
2582 *** GTK scroll-bars are now placed on the right by default.
2583 The function `set-scroll-bar-mode' can change this.
2585 *** GTK tool bars can have just text, just images or images and text.
2586 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2587 the default is taken from desktop settings.
2589 *** GTK tool bars can be placed on any edge of the frame.
2590 The frame-parameter tool-bar-position controls this. It takes the
2591 values top, left, right or bottom. The Options => Show/Hide menu has
2594 *** The default colors for selected text (the `region' face) are taken
2595 from the GTK theme when Emacs is built with GTK.
2597 *** Emacs uses GTK tooltips by default if built with GTK.
2598 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2600 ** Graphical interface changes
2602 *** On graphical displays, the mode-line no longer ends in dashes.
2603 Also, the first dash (which does not indicate anything) is just
2604 displayed as a space.
2606 *** `menu-bar-select-buffer-function' lets you choose another operation
2607 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2609 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2610 built with Xft. These fonts can be set via X resources, for example:
2611 Emacs.pane.menubar.font: Courier-12
2615 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2616 or if it receives a SIGINT signal in batch mode.
2618 *** `kill-emacs-hook' is now also run in batch mode.
2619 Third-party code which adds to `kill-emacs-hook' should check if they
2620 do the right thing in batch mode.
2622 ** Scrolling changes
2624 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2625 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2626 of buffer at first key-press (instead they move to top/bottom of buffer)
2627 when `scroll-error-top-bottom' is non-nil.
2629 *** New option `scroll-error-top-bottom' (see above).
2631 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2632 scroll a line instead of full screen.
2634 *** New property `scroll-command' should be set on a command's symbol to
2635 define it as a scroll command affected by `scroll-preserve-screen-position'.
2637 *** If you customize `scroll-conservatively' to a value greater than 100,
2638 Emacs will never recenter point in the window when it scrolls due to
2639 cursor motion commands or commands that move point (e.f., `M-g M-g').
2640 Previously, you needed to use `most-positive-fixnum' as the value of
2641 `scroll-conservatively' to achieve the same effect.
2643 *** "Aggressive" scrolling now honors the scroll margins.
2644 If you customize `scroll-up-aggressively' or
2645 `scroll-down-aggressively' and move point off the window, Emacs now
2646 scrolls the window so as to avoid positioning point inside the scroll
2649 ** Basic SELinux support has been added.
2650 This requires Emacs to be linked with libselinux at build time.
2652 *** Emacs preserves the SELinux file context when backing up.
2653 Also, the function `copy-file' has an extra optional argument for
2654 preserving SELinux context, and the return value of `backup-buffer'
2655 now includes the SELinux context.
2657 *** New functions `file-selinux-context' and `set-file-selinux-context'
2658 get and set the SELinux context of a file.
2662 *** `delete-by-moving-to-trash' now only affects commands that specify
2663 trashing. This avoids inadvertently trashing temporary files.
2665 *** Calling `delete-file' or `delete-directory' with a prefix argument
2666 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2668 ** File- and directory-local variable changes
2670 *** You can stop directory local vars from applying to subdirectories.
2671 Add an element (subdirs . nil) to the alist portion of any variables
2672 settings to indicate that the section should not apply to
2675 *** Directory local variables can apply to some file-less buffers.
2676 Affected modes include dired, vc-dir, and log-edit. For example,
2677 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2678 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2679 `hack-dir-local-variables-non-file-buffer' to support this.
2681 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2682 Instead, use "eval: (minor-mode 1)".
2684 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2685 to `inhibit-local-variables-regexps'. As the name suggests, it now
2686 applies to ALL file local variables, not just -*- lines. The
2687 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2692 *** The `quit-window' command now restores the last buffer displayed
2693 in the quitted window.
2695 *** Resizing an Emacs frame now preserves proportional window sizes,
2696 modulo restrictions like window minimum sizes and fixed-size windows.
2698 *** The behavior of `display-buffer' is now customizable in detail.
2700 **** New option `display-buffer-base-action' specifies a list of
2701 user-determined display "actions" (functions and optional arguments
2702 for choosing the displaying window).
2704 This takes precedence over the default display action, which is
2705 specified by `display-buffer-fallback-action'.
2707 **** New option `display-buffer-alist' maps buffer name regexps to
2708 display actions, taking precedence over `display-buffer-base-action'.
2710 *** New option `window-combination-limit'.
2711 The new option `window-combination-limit' allows to return the space
2712 obtained for resizing or creating a window more reliably to the window
2713 from which such space was obtained.
2715 *** New option `window-combination-resize'.
2716 The new option `window-combination-resize' allows to split a window that
2717 otherwise cannot be split because it's too small by stealing space from
2718 other windows in the same combination. Subsequent resizing or deletion
2719 of the window will resize all windows in the same combination as well.
2721 *** New option `frame-auto-hide-function' lets you choose between
2722 iconifying or deleting a frame when burying a buffer in a dedicated
2723 frame, or quitting a window showing a buffer in a frame of its own.
2725 *** New commands `maximize-window' and `minimize-window'.
2726 These maximize and minimize the size of a window within its frame.
2728 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2729 These functions allow to navigate through the live buffers that have
2730 been shown in a specific window.
2732 ** Minibuffer changes
2734 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2735 This is handy for minibuffer-only frames, and is also used for the feature
2736 where mouse-1 pops up *Messages*"', which can now easily be changed.
2738 *** Minibuffers set `truncate-lines' to nil.
2739 If you want to change the value to something else, you could use
2740 for example `minibuffer-setup-hook'.
2742 ** `auto-mode-case-fold' is now enabled by default.
2744 ** `backup-by-copying-when-mismatch' now defaults to t.
2746 ** New basic faces `error', `warning', `success'.
2747 These are used to highlight text indicating failure, caution or
2748 successful operation.
2750 ** New option `list-colors-sort' defines the color sort order
2751 for `list-colors-display'.
2753 ** The variable `focus-follows-mouse' now always defaults to nil.
2756 * Editing Changes in Emacs 24.1
2760 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2761 `isearch-yank-line'.
2763 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2764 `isearch-yank-kill'.
2766 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2768 ** New commands `count-words-region' and `count-words'.
2770 *** M-= is bound to `count-words-region', not `count-lines-region'.
2771 The `count-words-region' command, when called interactively, reports
2772 the number of lines, words, and characters in the region. It is a
2773 superset of the old `count-lines-region', which is now an obsolete
2776 ** The command `just-one-space' (M-SPC), if given a negative argument,
2777 also deletes newlines around point.
2781 *** New option `delete-active-region'.
2782 If non-nil, [delete] and DEL delete the region if it is active and no
2783 prefix argument is given. If set to `kill', those commands kill
2786 *** New command `delete-forward-char', bound to [delete].
2787 This is meant for interactive use, and obeys `delete-active-region'.
2788 The command `delete-char' does not obey `delete-active-region'.
2790 *** `delete-backward-char' is now a Lisp function.
2791 Apart from obeying `delete-active-region', its behavior is unchanged.
2792 However, the byte compiler now warns if it is called from Lisp; Lisp
2793 callers should use delete-char with a negative argument instead.
2795 *** The option `mouse-region-delete-keys' has been deleted.
2797 ** Selection changes.
2799 The default handling of clipboard and primary selections has been
2800 changed to conform with modern X applications. In short, most
2801 commands for killing and yanking text now use the clipboard, while
2802 mouse commands use the primary selection.
2804 In the following, we provide a list of these changes, followed by a
2805 list of steps to get the old behavior back if you prefer that.
2807 *** `select-active-regions' now defaults to t.
2808 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2809 the kill ring. The selected text is put in the primary selection, if
2810 the system possesses a separate primary selection facility (e.g. X).
2812 **** `select-active-regions' also accepts a new value, `only'.
2813 This means to only set the primary selection for temporarily active
2814 regions (usually made by mouse-dragging or shift-selection);
2815 "ordinary" active regions, such as those made with C-SPC followed by
2816 point motion, do not alter the primary selection.
2818 **** `mouse-drag-copy-region' now defaults to nil.
2820 *** mouse-2 is now bound to `mouse-yank-primary'.
2821 This pastes from the primary selection, ignoring the kill-ring.
2822 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2824 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2826 *** `x-select-enable-primary' now defaults to nil.
2827 Thus, commands that kill text or copy it to the kill-ring (such as
2828 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2830 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2831 exactly equivalent to M-w, C-w, and C-y respectively.
2833 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2834 non-nil by default, as Windows does not support the primary selection
2835 between applications.
2837 *** To return to the previous behavior, do the following:
2839 **** Change `select-active-regions' to nil.
2840 **** Change `mouse-drag-copy-region' to t.
2841 **** Change `x-select-enable-primary' to t (on X only).
2842 **** Change `x-select-enable-clipboard' to nil.
2843 **** Bind `mouse-yank-at-click' to mouse-2.
2845 *** Support for X cut buffers has been removed.
2847 *** X clipboard managers are now supported.
2848 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2850 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2851 in the current rectangle. With a prefix argument, this prompts for a
2852 number to count from and for a format string.
2854 ** `redisplay-dont-pause' now defaults to t.
2855 This makes Emacs feel more responsive to editing commands that arrive
2856 at high rate, e.g. if you lean on some key, because stopping redisplay
2857 in the middle (when this variable is nil) forces more expensive
2858 updates later on, and Emacs appears to be unable to keep up.
2860 ** The behavior of <TAB> for active regions in Text mode has changed.
2861 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2862 when the region is active causes Emacs to indent all the lines in the
2863 region, aligning them with the line previous to the first line in the
2864 region (or with the left margin if there is no previous line).
2866 ** When `occur' is called with a prefix argument, matching strings are
2867 collected into the `*Occur*' buffer without line numbers. If there
2868 are parenthesized subexpressions in the specified regexp, `occur'
2869 reads replacement text that may contain \\& and \\N whose convention
2870 follows `replace-match'.
2873 * Changes in Specialized Modes and Packages in Emacs 24.1
2875 ** Archive Mode has basic support for browsing and updating 7z archives.
2879 *** BibTeX mode now supports biblatex.
2880 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2881 `bibtex-entry-field-alist' is now an obsolete alias for
2882 `bibtex-BibTeX-entry-alist'.
2884 *** New command `bibtex-search-entries', bound to C-c C-a.
2886 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2888 *** New variable `bibtex-search-entry-globally'.
2892 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2894 *** The default browser used by the package is now the "xdg-open" program,
2895 on platforms that support it. This calls your desktop's preferred browser.
2899 *** Support for musical notes.
2901 *** Support for logarithmic units.
2903 *** No longer uses the tex prefix for TeX specific unit names when
2904 using TeX or LaTeX mode.
2906 *** New option to highlight selections using faces.
2908 *** `calc-histogram' has the option of using a vector to determine the bins.
2910 *** New "O" option prefix.
2912 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2914 ** Calendar, Diary, and Appt
2916 *** Diary entries can contain non-printing "comments".
2917 See the variable `diary-comment-start'.
2919 *** Appointments can specify their individual warning times.
2920 See the variable `appt-warning-time-regexp'.
2922 *** The function specified by `appt-disp-window-function' may be passed
2923 lists of arguments if multiple appointments are due at similar times.
2924 If you are using a custom function for this, you should update it.
2926 *** New function `diary-hebrew-birthday'.
2928 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2929 may no longer be nil, but must all be strings.
2931 *** The obsolete (since Emacs 22.1) method of enabling the appt
2932 package by adding `appt-make-list' to `diary-hook' has been removed.
2933 Use `appt-activate' instead.
2935 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2936 appt-issue-message (use the function appt-activate)
2937 appt-visible/appt-msg-window (use the variable appt-display-format)
2939 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2940 view-diary-entries, list-diary-entries, show-all-diary-entries
2944 *** New feature to "guess" the style in an existing buffer.
2945 The main entry point is M-x c-guess.
2947 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2949 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2950 Thus C-M-a will, by default, go to the beginning of the immediate function,
2953 *** "Macros with semicolons" can be registered for correct indentation.
2954 Where such a macro ends a line (no semicolon) the next statement is no longer
2955 parsed as a statement continuation.
2957 ** Comint and modes derived from it use the standard completion code.
2961 *** Compilation mode can be used without Font Lock mode.
2962 `compilation-parse-errors-function' is now obsolete.
2964 *** New variable `compilation-filter-start', which is bound while
2965 `compilation-filter-hook' runs. It records the start position of the
2966 text inserted by `compilation-filter'.
2968 *** `compilation-error-screen-columns' and `compilation-first-column'
2969 are obeyed in the editing buffer. So programming language modes can
2970 set them, whereas previously only the value in the *Compilation*
2975 *** Customize buffers now contain a search field.
2976 The search is performed using `customize-apropos'.
2977 To turn off the search field, set `custom-search-field' to nil.
2979 *** Options in customize group buffers start out hidden if not customized.
2980 Use the arrow to the left of the option name to toggle visibility.
2982 *** custom-buffer-sort-alphabetically now defaults to t.
2984 *** The color widget now has a "Choose" button, which allows you to
2985 choose a color via `list-colors-display'.
2989 *** It is now possible to access buses other than the default system
2992 *** The `dbus-register-method' and `dbus-register-property' functions
2993 optionally do not register names.
2995 *** The new function `dbus-register-service' registers a known service
2996 name on a D-Bus without also registering a property or a method.
3000 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3001 if called with a prefix argument, read a file name from the minibuffer
3002 instead of using the current buffer.
3004 *** The "dired local variables" feature of Dired-x is obsolete.
3005 The standard directory local variables feature replaces it.
3009 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3010 controlling attempts to autojoin a channel.
3012 *** New variable `erc-coding-system-precedence': If we use `undecided'
3013 as the server coding system, this variable will then be consulted.
3014 The default is to decode strings that can be decoded as utf-8 as
3015 utf-8, and do the normal `undecided' decoding for the rest.
3019 *** The default value of `eshell-directory-name' has changed
3020 to be an "eshell" directory in `user-emacs-directory'.
3021 The old "~/.eshell/" directory is still used if it exists, though.
3025 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3026 It now supports multithread non-stop debugging and simultaneous
3027 debugging of several threads.
3031 *** RET (`image-toggle-animation') toggles animation, if applicable.
3032 Animation plays once, unless the option `image-animate-loop' is non-nil.
3036 *** New command M-x info-display-manual displays a named Info manual.
3037 If that manual is already visited in some Info buffer, it displays
3038 that buffer. (This is handy if you have many manuals in many *info*
3039 buffers, and don't remember the name of the buffer visiting the manual
3040 you want to consult.) Otherwise, it loads and displays the manual.
3042 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3043 This is for compatibility with the stand-alone Info reader program,
3044 and also because `Info-edit' is a rarely used command that is disabled
3047 ** Mail mode changes (not Message mode)
3049 *** New command M-x mail-add-attachment for adding MIME attachments
3051 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3052 (Its name is misleading, since it has nothing to do with MIME
3053 attachments.) The old name is now an obsolete alias to the new name.
3055 ** MH-E has been updated to MH-E version 8.3.1.
3056 See MH-E-NEWS for details.
3058 ** Modula-2 mode provides auto-indentation.
3060 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3062 ** nXML mode no longer binds C-RET to `nxml-complete'.
3063 Completion is now performed via `completion-at-point', bound to C-M-i
3064 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3065 default), this performs tag completion.
3067 ** Org mode has been updated to version 7.8.09.
3068 See ORG-NEWS for details.
3070 ** Prolog mode has been completely revamped, with lots of additional
3071 functionality such as more intelligent indentation, electricity,
3072 support for more variants, including Mercury, and a lot more.
3076 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3077 in the Rmail incoming message.
3079 *** The variable `rmail-message-filter' no longer has any effect.
3080 This change was made in Emacs 23.1 but was not advertised at the time.
3081 Try using `rmail-show-message-hook' instead.
3085 *** M-x shell prompts for the shell path name if the default directory
3086 is a remote file name and neither the environment variable $ESHELL nor
3087 the variable `explicit-shell-file-name' is set.
3089 *** TAB is now bound to the standard `completion-at-point' command,
3090 which now implements the pcomplete rules for shell command completion.
3094 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3095 if the mail server supports them. This uses either built-in GnuTLS
3096 support, or the starttls.el library. Customize `smtpmail-stream-type'
3099 *** The variable `smtpmail-auth-credentials' has been removed.
3100 By default, the information is now stored in the file ~/.authinfo.
3101 This was the default value of smtpmail-auth-credentials. If you had
3102 customized smtpmail-auth-credentials to a list of user names and
3103 passwords, those settings are not used. During your first connection
3104 to the smtp server, Emacs will prompt for the user name and password,
3105 and offer to save them to ~/.authinfo. Or you can manually copy the
3106 credentials to ~/.authinfo. For example, if you had
3108 (setq smtpmail-auth-credentials
3109 '(("mail.example.org" 25 "jim" "s!cret")))
3111 then the equivalent line in ~/.authinfo would be
3113 machine mail.example.org port 25 login jim password s!cret
3115 See the auth-source manual for more information, e.g. on encrypting
3116 the credentials file.
3118 *** The variable `smtpmail-starttls-credentials' has been removed.
3119 If you had that set, you need to put
3121 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3123 in your ~/.authinfo file instead.
3125 *** SMTPmail defaults to using the address in the From: header as the
3126 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3127 to the address you wish to use instead.
3131 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3132 and `sql-oracle-scan-on'.
3134 *** New options controlling prompting for login parameters.
3135 Each supported product has a custom variable `sql-*-login-params',
3136 which is a list of the parameters to be prompted for before a
3137 connection is established.
3139 *** The command `sql-product-interactive' now takes a prefix argument,
3140 which causes it to prompt for an SQL product.
3142 *** Product-specific SQL interactive commands now take prefix arguments.
3143 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3144 given a prefix argument, prompt for a name for the SQL interactive
3145 buffer. This reduces the need for calling `sql-rename-buffer'.
3147 *** SQL interactive modes suppress command continuation prompts, and
3148 replace tabs with spaces. The first change impacts multiple line SQL
3149 statements entered with C-j between each line, statements yanked into
3150 the buffer and statements sent with `sql-send-*' functions. The
3151 second prevents the MySQL and Postgres interpreters from listing
3152 object name completions when sent text via `sql-send-*' functions.
3154 *** New command `sql-connect' starts a predefined SQLi session,
3155 using the login parameters from `sql-connection-alist'.
3157 *** New "Save Connection" menu item in SQLi buffers.
3158 This gathers the login params specified for the SQLi session, if it
3159 was not started by a connection, and saves them as a new connection.
3161 *** New commands for listing database objects and details:
3162 sql-list-all and sql-list-table.
3164 *** An API for manipulating SQL product definitions has been added.
3168 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3172 *** New inline access method "ksu" (kerberized su).
3174 *** The following access methods are discontinued: "ssh1_old",
3175 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3177 *** The user option `remote-file-name-inhibit-cache' controls whether
3178 remote file attributes are cached for better performance.
3180 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3181 default value to "".
3183 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3184 for remote machines which support SELinux.
3186 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3187 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3188 the degree of parallelism.
3190 ** VC and related modes
3192 *** Support for pulling on distributed version control systems.
3193 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3194 supported (currently with Bzr, Git, and Mercurial), to update the
3195 current branch and working tree. A prefix argument means to prompt
3196 the user for specifics, e.g. a pull location.
3198 *** `vc-update' is now an alias for `vc-pull'.
3200 *** Support for merging on distributed version control systems.
3201 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3202 is supported (currently with Bzr, Git, and Mercurial), to merge
3203 changes from another branch into the current one. It prompts for
3204 specifics, e.g. a merge source.
3206 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3207 shows a diff while querying the user. It defaults to t.
3209 *** Log entries in some Log View buffers can be toggled to display a
3210 longer description by typing RET (log-view-toggle-entry-display).
3211 This is currently supported for Bzr, Git, and Mercurial (to support
3212 another backend, define a `log-view-expanded-log-entry-function').
3213 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3214 use this to display the full log entry for the revision at point.
3216 *** New command `vc-ediff' allows visual comparison of two revisions
3217 of a file similar to `vc-diff', but using ediff backend.
3219 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3220 this was not advertised at the time.
3222 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3223 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3224 this was not advertised at the time.
3230 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3232 *** partial-completion-mode (complete.el) is obsolete.
3233 You can get a comparable behavior with:
3234 (setq completion-styles '(partial-completion initials))
3235 (setq completion-pcm-complete-word-inserts-delimiters t)
3237 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3239 *** pgg is obsolete (use EasyPG instead).
3241 *** sregex.el is obsolete, since rx.el is a strict superset.
3243 *** s-region.el and pc-select.el are obsolete.
3244 They are superseded by shift-select-mode, enabled by default since 23.1.
3246 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3250 *** The Landmark game is now invoked with `landmark', not `lm'.
3251 Its functions and variables have been similarly renamed.
3253 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3254 (This interfered with cua-mode.)
3256 *** f90.el has some support for Fortran 2008 syntax.
3258 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3260 *** New command `nato-region' converts text to NATO phonetic alphabet.
3263 * New Modes and Packages in Emacs 24.1
3265 ** Occur Edit mode applies edits made in *Occur* buffers to the
3266 original buffers. It is bound to "e" in Occur mode.
3268 ** New global minor mode electric-pair-mode.
3269 When enabled, typing an open parenthesis automatically inserts the
3270 matching closing one.
3272 ** New global minor mode electric-indent-mode.
3273 When enabled, typing certain characters triggers reindentation.
3274 Major modes wishing to use this can set electric-indent-chars or
3275 electric-indent-functions.
3277 ** New global minor mode electric-layout-mode.
3278 When enabled, typing certain characters automatically inserts newlines.
3279 Major modes wishing to use this can set electric-layout-rules.
3281 ** tabulated-list.el provides a generic major mode for tabulated data,
3282 from which other modes can be derived.
3284 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3286 ** secrets.el is an implementation of the Secret Service API, an
3287 interface to password managers like GNOME Keyring or KDE Wallet. The
3288 Secret Service API requires D-Bus for communication. The command
3289 `secrets-show-secrets' offers a buffer with a visualization of the
3292 ** notifications.el provides an implementation of the Desktop
3293 Notifications API. It requires D-Bus for communication.
3295 ** soap-client.el supports access to SOAP web services from Emacs.
3296 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3298 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3300 ** New emacs-lock.el package.
3301 The previous version has been moved to obsolete/old-emacs-lock.el.
3302 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3303 against exiting Emacs and killing the buffer can be set separately.
3304 The mechanism for automatically turning off protection for buffers
3305 with dead inferior processes has been generalized.
3308 * Incompatible Lisp Changes in Emacs 24.1
3310 ** Passing a nil argument to a minor mode function call now ENABLES
3311 the minor mode unconditionally. This is so that you can write e.g.
3313 (add-hook 'text-mode-hook 'foo-mode)
3315 to enable foo-mode in Text mode buffers, removing the need for
3316 `turn-on-foo-mode' style functions. This affects all mode commands
3317 defined by `define-minor-mode'. If called interactively, the mode
3318 command still toggles the minor mode.
3320 ** The return value of `backup-buffer' has changed.
3321 It is now a list of three elements, where the second element is a list
3322 describing the original file's SELinux context. If Emacs or the
3323 system lacks SELinux support, the context list is (nil nil nil nil).
3324 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3326 ** `char-direction-table' and the `char-direction' function were deleted.
3327 They were buggy and inferior to the new support of bidirectional
3328 editing introduced in Emacs 24. If you need the bidirectional
3329 properties of a character, use `get-char-code-property' with the last
3330 argument `bidi-class'.
3332 ** `copy-directory' now copies the source directory as a subdirectory
3333 of the target directory, if the latter is an existing directory. The
3334 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3335 the contents directly into a pre-existing target directory.
3337 ** For mouse click input events in the text area, the Y pixel
3338 coordinate in the POSITION list now counts from the top of the text
3339 area, excluding any header line. Previously, it counted from the top
3342 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3343 been further reduced. Now a backquote not followed by a space is
3344 always treated as a "new-style" backquote. Please remove all
3345 "old-style" backquotes from your code. If your code uses backquotes
3346 as documented in the Elisp manual, and compiles without warning, then
3347 you have nothing to do in this regard. Code not following the
3348 appropriate conventions may fail to compile.
3350 The most common cause of trouble seems to be an old-style backquote
3351 followed by a newline. Another cause of trouble is vector notation
3352 for key sequence notation: instead of [(control ,)] and [(control ')],
3353 you should write [(control ?,)] and [(control ?')], which will work in
3356 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3357 was not advertised at the time. The function `custom-initialize-delay'
3358 replaced all known uses.
3360 ** `view-buffer' now treats special mode-class in the same way that
3361 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3362 major mode is special).
3364 ** Menu and tool bar changes
3366 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3367 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3368 With these alist entries omitted, `make-frame' checks the value of the
3369 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3370 a menu-bar or tool-bar, respectively. If the alist entries are added,
3371 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3373 *** The menu bar bindings's caches are not used any more.
3374 Use (where-is-internal <def> nil t) instead.
3376 ** Regions created by mouse dragging are now normal active regions,
3377 similar to those created by shift-selection (see Selection changes
3378 above). In previous Emacs versions, these regions were delineated by
3379 `mouse-drag-overlay'; that variable has been removed.
3381 ** The fourth argument of `filter-buffer-substring' has been removed.
3382 If you want to remove text properties from the final result, simply
3383 pass the result through substring-no-properties.
3385 ** cl.el no longer provides `cl-19'.
3387 ** The following obsolete functions and aliases have been removed
3388 (the appropriate new function is given in parentheses; "not needed"
3389 means you can just remove all calls to the function in question):
3391 *** `comint-kill-output' (`comint-delete-output')
3392 *** `decompose-composite-char' (`char-to-string')
3393 *** `outline-visible' (`outline-invisible-p')
3394 *** `internal-find-face' (`facep')
3395 *** `internal-get-face' (`facep and check-face')
3396 *** `frame-update-faces' (not needed)
3397 *** `frame-update-face-colors' (`frame-set-background-mode')
3398 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3399 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3400 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3401 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3402 *** `x-make-font-unbold' (`make-face-unbold')
3403 *** `x-make-font-unitalic' (`make-face-unitalic')
3404 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3405 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3406 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3407 *** `char-bytes' (== 1)
3408 *** `isearch-return-char' (`isearch-printing-char')
3409 *** `make-local-hook' (not needed)
3410 *** `set-screen-height' (`set-frame-height')
3411 *** `set-screen-width' (`set-frame-width')
3413 ** The following obsolete variables and varaliases have been removed
3414 (the appropriate new variable is given in parentheses):
3416 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3417 *** `vc-header-alist' (`vc-BACKEND-header')
3418 *** `directory-sep-char' (== ?/)
3419 *** `font-lock-defaults-alist' (`font-lock-defaults')
3420 *** `e' (`float-e').
3422 ** The following obsolete files were removed:
3423 sc.el, x-menu.el, rnews.el, rnewspost.el
3425 ** The format of the finder-inf.el file has changed, since the Finder
3426 mechanism is now based on the package system. The variable
3427 `finder-package-info' is replaced by `package--builtins' and
3428 `finder-keywords-hash'.
3430 ** When generating autoloads, `update-directory-autoloads' no longer
3431 assumes every inspected file is in your `load-path'. It instead
3432 generates relative names according to the current `load-path'.
3435 * Lisp Changes in Emacs 24.1
3437 ** Code can now use lexical scoping by default instead of dynamic scoping.
3438 The `lexical-binding' variable enables lexical scoping for local
3439 variables. It is typically set via a file-local variable in the first
3440 line of the file, in which case it applies to all the code in that
3443 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3444 binding instead of the old dynamic binding mode.
3446 *** Lexically scoped interpreted functions are represented with a new form
3447 of function value which looks like (closure ENV ARGS &rest BODY).
3449 *** New macro `letrec' to define recursive local functions.
3451 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3452 So do `defcustom' and other forms that call `defvar' as a subroutine.
3454 *** New function `special-variable-p' to check whether a variable is
3455 declared as dynamically bound.
3457 *** The form ((lambda ...) ...) is deprecated.
3459 ** An Emacs Lisp testing tool is now included.
3460 Emacs Lisp developers can use this tool to write automated tests for
3461 their code. See the ERT info manual for details.
3463 ** Changes for bidirectional display and editing
3465 *** New function `current-bidi-paragraph-direction'.
3466 This returns the base direction of the paragraph at point.
3468 *** New function `bidi-string-mark-left-to-right'.
3469 Given a string containing characters from right-to-left scripts, this
3470 function returns another string which can be safely inserted into a
3471 buffer, such that any following text will be always displayed to the
3472 right of that string. (This works by appending an invisible Unicode
3473 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3475 This is useful when the buffer has overall left-to-right paragraph
3476 direction and you need to insert a string whose contents are not known
3477 in advance, without disrupting the layout of the line.
3481 *** Window tree functions are accessible in Elisp.
3482 Functions are provided to return the parent, siblings or child windows
3483 of any window including internal windows (windows not associated with a
3484 buffer) in the window tree.
3486 **** New function `window-valid-p' gives non-nil for live and internal
3489 **** Window manipulation can deal with internal windows.
3490 Many window handling functions like `split-window', `delete-window', or
3491 `delete-other-windows' as well as the window resizing functions can now
3492 act on any window including internal ones.
3494 *** window-total-height/-width vs window-body-height/-width.
3495 The function `window-height' has been renamed to `window-total-height'
3496 and `window-width' has been renamed to `window-body-width'. The old
3497 names are provided as aliases. Two new functions `window-total-width'
3498 and `window-body-height' are provided.
3500 *** Window parameters specific to window handling functions.
3501 For each window you can specify a parameter to override the default
3502 behavior of a number of functions like `split-window', `delete-window'
3503 and `delete-other-windows'. The variable `ignore-window-parameters'
3504 allows to ignore processing such parameters.
3506 *** New semantics of third argument of `split-window'.
3507 The third argument of `split-window' has been renamed to SIDE and can be
3508 set to any of the values 'below, 'right, 'above, or 'left to make the
3509 new window appear on the corresponding side of the window that shall be
3510 split. Any other value of SIDE will cause `split-window' to split the
3511 window into two side-by-side windows as before.
3513 *** Window resizing functions.
3514 A new standard function for resizing windows called `window-resize' has
3515 been introduced. This and all other functions for resizing windows no
3516 longer delete any windows when they become too small.
3518 *** Deleting the selected window now selects the most recently selected
3519 live window on that frame instead.
3521 *** `adjust-window-trailing-edge' adjustments.
3522 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3523 is able to resize other windows if a window adjacent to the trailing
3524 edge cannot be shrunk any more. This makes its behavior more similar to
3525 that of Emacs 21 without compromising, however, its inability to delete
3526 windows which was introduced in Emacs 22.
3528 *** Window-local buffer lists.
3529 Windows now have local buffer lists. This means that removing a buffer
3530 from display in a window will preferably show the buffer previously
3531 shown in that window with its previous window-start and window-point
3532 positions. This also means that the same buffer may be automatically
3533 shown twice even if it already appears in another window.
3535 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3536 which if non-nil requires the buffer to be displayed in the currently
3537 selected window, signaling an error otherwise. If nil, another window
3538 can be used, e.g. if the selected one is strongly dedicated.
3540 *** `split-window-vertically' and `split-window-horizontally' renamed
3541 to `split-window-below' and `split-window-right' respectively.
3542 The old names are kept as aliases.
3546 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3547 named ACTION, and takes a display action of the same form as
3548 `display-buffer-base-action' (see Changes, above). A non-nil,
3549 non-list value is treated specially, as the old meaning.
3551 **** New variable `display-buffer-overriding-action'.
3553 **** The procedure of `display-buffer' etc. to choose a window is
3554 determined by combining `display-buffer-overriding-action',
3555 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3556 and `display-buffer-fallback-action'. The second and fourth of these
3557 are user-customizable variables.
3559 See the docstring of `display-buffer' for details.
3561 *** New functions `window-state-get' and `window-state-put'.
3562 These functions allow to save and restore the state of an arbitrary
3563 frame or window as an Elisp object.
3567 *** New variable `completion-extra-properties' used to specify extra
3568 properties of the current completion:
3569 - :annotate-function, same as the old completion-annotate-function.
3570 - :exit-function, function to call after completion took place.
3572 *** Functions on `completion-at-point-functions' can return any of the
3573 properties valid for `completion-extra-properties'.
3575 *** `completion-annotate-function' is obsolete.
3577 *** New `metadata' method for completion tables. The metadata thus returned
3578 can specify various details of the data returned by `all-completions':
3579 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3580 used to select a style in completion-category-overrides.
3581 - `annotation-function' to add annotations in *Completions*.
3582 - `display-sort-function' to specify how to sort entries in *Completions*.
3583 - `cycle-sort-function' to specify how to sort entries when cycling.
3585 *** `minibuffer-local-filename-must-match-map' is not used any more.
3586 Instead, the bindings in `minibuffer-local-filename-completion-map'
3587 are combined with `minibuffer-local-must-match-map'.
3589 *** New variable `completing-read-function' allows overriding the
3590 behavior of `completing-read'.
3592 ** `glyphless-char-display' can now distinguish between graphical and
3593 text terminal display, via a char-table entry that is a cons cell.
3595 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3596 Instead, the offending function is removed.
3600 *** New function `run-hook-wrapped' for running an abnormal hook by
3601 passing the hook functions as arguments to a "wrapping" function.
3602 Like `run-hook-with-args-until-success', it stops at the first
3603 non-nil return value.
3605 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3606 set of "wrapping" filters, similar to around advice.
3607 (A version of this macro was actually added in Emacs 23.2 but was not
3608 advertised at the time.)
3612 *** New macro `condition-case-unless-debug' (this was actually added in
3613 Emacs 23.1 as condition-case-no-debug, but not advertised)
3615 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3617 *** Variable `stack-trace-on-error' removed.
3619 *** The debugger can now "continue" from an error, which means it will
3620 jump to the error handler as if the debugger had not been invoked
3621 instead of jumping all the way to the top-level.
3623 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3624 This can be useful when `inhibit-quit' is set.
3626 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3627 named Emacs server instances.
3629 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3630 to redirect STDOUT to a file.
3632 ** The function `format-time-string' now supports the %N directive,
3633 for higher-resolution time stamps.
3635 ** New input reading functions
3637 *** New function `read-char-choice' reads a restricted set of
3638 characters, discarding any inputs not inside the set.
3640 *** The command `read-color' now requires a match for a color name
3641 or RGB triplet, instead of signaling an error if the user provides
3644 **** `facemenu-read-color' is now an alias for `read-color'.
3646 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3647 The variable is now used to load all kind of supported dynamic libraries,
3648 not just image libraries. The previous name is still available as an
3651 ** Syntax parsing changes
3653 *** New variable `syntax-propertize-function'.
3654 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3655 This allows syntax-table properties to be set independently from font-lock:
3656 just call syntax-propertize to make sure the text is propertized.
3657 Together with this new variable come a new hook
3658 syntax-propertize-extend-region-functions, as well as two helper functions:
3659 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3660 as-is; and syntax-propertize-rules which provides a new way to specify
3663 *** Syntax tables support a new "comment style c" additionally to style b.
3665 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3667 ** frame-local variables cannot be let-bound any more.
3669 ** Major and minor mode changes
3671 *** `set-auto-mode' now respects mode: local variables at the end of files,
3672 as well as those in the -*- line.
3674 *** `prog-mode' is a new major mode from which programming modes
3677 **** `prog-mode-hook' can be used to enable features for programming
3678 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3679 on-the-fly spell checking for comments and strings.
3681 *** New hook `change-major-mode-after-body-hook', run by
3682 `run-mode-hooks' just before any other mode hooks.
3684 *** Enabled globalized minor modes can be disabled in specific major modes.
3685 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3686 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3688 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3690 ** File-handling changes
3692 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3693 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3694 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3695 argument is supplied (see Trash changes, above).
3697 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3699 ** Tool-bars can display separators.
3700 Tool-bar separators are handled like menu separators in menu-bar maps,
3701 i.e. via menu entries of the form `(menu-item "--")'.
3705 *** Animated images support (currently animated gifs only).
3707 **** `image-animated-p' returns non-nil if an image can be animated.
3709 **** `image-animate' animates a supplied image spec.
3711 **** `image-animate-timer' returns the timer object for an image that
3714 *** `image-extension-data' has been renamed to `image-metadata'.
3715 The old name is an obsolete alias to the new one.
3717 *** Image mode can view any image type that ImageMagick supports.
3718 This requires Emacs to be built with ImageMagick support.
3720 **** New function `imagemagick-types', defined if ImageMagick support
3721 is enabled, returns a list of image file extensions that your
3722 ImageMagick installation supports.
3724 **** New function `imagemagick-register-types' enables ImageMagick
3725 image types in Image mode and in `create-image' and other helper
3728 **** New option `imagemagick-types-inhibit' excludes certain
3729 ImageMagick image types from `imagemagick-register-types'.
3731 **** With ImageMagick support, there are extra Image mode commands to
3732 resize and rotate images: `image-transform-fit-to-height',
3733 `image-transform-fit-to-width', `image-transform-set-rotation', and
3734 `image-transform-set-scale'.
3736 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3737 passes it to the mail user agent function. This argument specifies an
3738 action for returning to the caller after finishing with the mail. For
3739 example, this is used by Rmail to optionally delete a mail window.
3741 ** XML and HTML parsing
3742 If Emacs is compiled with libxml2 support, there are two new
3743 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3744 and `libxml-parse-xml-region' (which parses XML). Both return an
3745 Emacs Lisp parse tree.
3747 ** Networking and encryption changes
3749 *** `open-network-stream' can now be used to open an encrypted stream.
3750 It now accepts an optional `:type' parameter for initiating a TLS
3751 connection, directly or via STARTTLS. To do STARTTLS, additional
3752 parameters (`:end-of-command', `:success', `:capabilities-command')
3753 must also be supplied.
3755 *** New library gnutls.el.
3756 The new function `gnutls-available-p' returns non-nil if Emacs is
3757 built with GnuTLS support. The main entry points are
3758 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3759 these functions through `open-network-stream', because that can
3760 upgrade connections through STARTTLS opportunistically or use plain
3761 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3764 *** New primitive `secure-hash' that supports many secure hash algorithms:
3765 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3766 sha1.el has been removed. The `sha1' feature is provided by default.
3770 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3772 ** Progress reporters can now "spin".
3773 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3774 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3775 time you call `progress-reporter-update' on that progress reporter,
3776 with a nil or omitted VALUE argument, the reporter message is
3777 displayed with a "spinning bar".
3779 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3780 being reverted, even if the buffer has a local `revert-buffer-function'.
3782 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3783 If delayed-warnings-list is non-nil, the command loop calls
3784 `delayed-warnings-hook' after `post-command-hook'. At present, this
3785 is only used by Emacs on some platforms to display warnings during
3786 startup, which might otherwise not be noticed. This uses the
3787 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3789 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3791 ** New function `make-composed-keymap' that constructs a new keymap
3792 from multiple input maps. You can use this to make a keymap that
3793 inherits from multiple maps, eg:
3794 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3796 ** New function `string-prefix-p'.
3797 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3799 ** New reader macro ## that stands for the empty symbol.
3800 This means that the empty symbol can now be read back. Also, #: by itself
3801 (when not immediately followed by a possible symbol character) stands for
3802 an empty uninterned symbol.
3804 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3806 ** The following functions and variables are obsolete:
3808 *** `tooltip-use-echo-area' is obsolete.
3809 Rather than setting this to t, disable Tooltip mode instead.
3811 *** buffer-substring-filters is obsolete.
3812 Use `filter-buffer-substring-functions' instead.
3814 *** `byte-compile-disable-print-circle' is obsolete.
3816 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3817 Use `post-command-hook' instead.
3819 *** `font-lock-maximum-size' is obsolete.
3822 * Changes in Emacs 24.1 on Non-Free Operating Systems
3824 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3825 and also when HOME is set to C:\ by default.
3827 ** New configure.bat options
3829 *** --enable-checking builds Emacs with extra runtime checks.
3831 *** --distfiles specifies files to be included in binary distribution.
3833 *** --without-gnutls disables automatic GnuTLS detection.
3835 *** --lib for general library linkage, works with the USER_LIBS build variable.
3837 ** New make target `dist' to create binary distribution for MS Windows.
3839 ** The Lisp function `w32-default-color-map' is now obsolete.
3840 (It is only used internally in the Emacs C code.)
3842 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3843 reappear on mouse-over. (Requires OS X 10.6 or later.)
3845 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3846 other platforms, rather than inserting its contents into the buffer.
3849 ----------------------------------------------------------------------
3850 This file is part of GNU Emacs.
3852 GNU Emacs is free software: you can redistribute it and/or modify
3853 it under the terms of the GNU General Public License as published by
3854 the Free Software Foundation, either version 3 of the License, or
3855 (at your option) any later version.
3857 GNU Emacs is distributed in the hope that it will be useful,
3858 but WITHOUT ANY WARRANTY; without even the implied warranty of
3859 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3860 GNU General Public License for more details.
3862 You should have received a copy of the GNU General Public License
3863 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3868 paragraph-separate: "[
\f]*$"