1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 ** When initializing `load-path', an empty element in the EMACSLOADPATH
67 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
68 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
69 load-path (the one that would have been used if EMACSLOADPATH was unset).
70 This makes it easier to _extend_ the load-path via EMACSLOADPATH
71 (previously, EMACSLOADPATH had to specify the complete load-path,
72 including the defaults). (In older versions of Emacs, an empty element
73 was replaced by ".", so use an explicit "." now if that is what you want.)
76 ** The -L option, which normally prepends its argument to load-path,
77 will instead append, if the argument begins with `:' (or `;' on MS Windows;
78 i.e., `path-separator').
81 ** If you use either site-load.el or site-init.el to customize the dumped
82 Emacs executable, any changes to `load-path' that these files make
83 will no longer be present after dumping. To affect a permanent change
84 to `load-path', use the `--enable-locallisppath' option of `configure'.
87 * Changes in Emacs 24.4
90 ** Emacs now supports menus on text-mode terminals.
91 If the terminal supports a mouse, clicking on the menu bar, or on
92 sensitive portions of the mode line or header line, will drop down the
93 menu defined at that position. Likewise, clicking C-mouse-2 or
94 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
97 If the text terminal does not support a mouse, you can activate the
98 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
100 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
101 customize the option `tty-menu-open-use-tmm' to a non-nil value.
102 (Typing M-` will always invoke `tmm-menubar', even if
103 `tty-menu-open-use-tmm' is nil.)
106 ** Key ? also describes prefix bindings like C-h.
109 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
110 because it affects caching of paragraph scanning results as well.
113 ** `apropos-variable' is now `apropos-user-option'
114 `apropos-user-option' shows all user options while `apropos-variable'
115 shows all variables. When called with a universal prefix argument,
116 the two commands swap their behaviors. When `apropos-do-all' is
117 non-nil, they output the same results.
120 ** `eval-defun' on an already defined defcustom calls the :set function,
123 ** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
124 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
125 a list with no limit on its length and level (by using nil values of
126 `print-length' and `print-level'), and inserts additional formats for
127 integers (octal, hexadecimal, and character).
129 ** If the new variable `enable-dir-local-variables' is nil,
130 directory local variables are ignored. May be useful for some modes
131 that want to ignore directory-locals while still respecting file-locals.
134 ** The option `set-mark-default-inactive' has been deleted.
135 This unfinished feature was introduced by accident in Emacs 23.1;
136 simply disabling Transient Mark mode does the same thing.
139 ** `initial-buffer-choice' can now specify a function to set up the
143 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
144 and read-only. Code that might create the *Messages* buffer should
145 call the function `messages-buffer' to do so and set the mode.
147 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
148 You may think of it as a *scratch* buffer whose content is preserved.
149 In fact, it was designed as a replacement for *scratch* buffer and can
150 be used that way by setting `initial-buffer-choice' to `remember-notes'
151 and `remember-notes-buffer-name' to "*scratch*". Without the second
152 change, *scratch* buffer will still be there for notes that do not
153 need to be preserved.
156 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
158 ** ACL support has been added.
160 *** Emacs preserves the ACL entries of files when backing up.
162 *** New functions `file-acl' and `set-file-acl' get and set the ACL
163 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
164 libacl. On MS-Windows, the NT Security APIs are used to emulate the
165 POSIX ACL interfaces.
167 ** New option `scroll-bar-adjust-thumb-portion'.
168 Available only on X, this option allows to control over-scrolling
169 using the scroll bar (i.e. dragging the thumb down even when the end
170 of the buffer is visible).
173 ** New function `add-face-text-property' has been added, which can be
174 used to conveniently prepend/append new face attributes to text.
176 ** In compiled Lisp files, the header no longer includes a timestamp.
178 ** Multi-monitor support has been added.
180 *** New functions `display-monitor-attributes-list' and
181 `frame-monitor-attributes' can be used to obtain information about
182 each physical monitor on multi-monitor setups.
184 *** The functions `display-pixel-width' and `display-pixel-height' now
185 behave consistently among the platforms: they return the pixel width
186 or height for all physical monitors associated with the given display
187 as just they were on X11. To get information for each physical
188 monitor, use the new functions above. Similar notes also apply to
189 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
190 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
192 ** New macro `define-alternatives' can be used to define generic commands.
193 Generic commands are interactive functions whose implementation can be
194 selected among several alternatives, as a matter of user preference.
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 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
201 You can change the default by customizing the variable blink-cursor-blinks.
202 Also timers for blinking are stopped when no blinking is done, so Emacs does
203 not consume CPU cycles.
205 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
206 `frame-configuration-to-register'. It offers similar functionality, plus
207 some enhancements, like the ability to restore deleted frames. Command
208 `frame-configuration-to-register' is still available, but unbound.
210 ** The command `quail-help' is deleted. Use `C-h C-\'
211 (`describe-input-method') instead.
213 ** The default value of `comment-use-global-state' is changed to t,
214 and this variable has been marked obsolete.
216 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
217 a 1-letter word, which is an error according to Polish and
218 Czech typography rules. To globally enable this feature, evaluate:
220 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
223 * Editing Changes in Emacs 24.4
226 ** `electric-indent-mode' is enabled by default.
229 ** Uniquify is enabled by default with post-forward-angle-brackets style.
231 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
232 Most commands are still unaware of it, but kill/yank do work on the rectangle.
234 ** C-x TAB enters a transient interactive mode.
235 You can then use the left/right cursor keys to move the block of text.
237 ** `tab-stop-list' is now implicitly extended to infinity by repeating
238 the last step. Its default value is changed to nil which means a tab
239 stop every `tab-width' columns.
242 ** `split-window' is no longer a command, just a non-interactive function.
243 As a command it was a special case of `split-window-below', and as such
244 superfluous. After being reimplemented in Lisp, its interactive form
245 was mistakenly retained.
248 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
249 bound to <f11> and M-<f10>, respectively.
252 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
256 ** New option `visual-order-cursor-movement'.
257 If this is non-nil, cursor motion with arrow keys will follow the
258 visual order of characters on the screen: <left> always moves to the
259 left, <right> always moves to the right, disregarding the surrounding
260 bidirectional context.
262 ** All register commands can now show help with preview.
264 ** New command `kmacro-to-register' to store keyboard macros in registers.
268 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
269 You can pick the name of the function and the variables with `C-x 4 a'.
272 * Changes in Specialized Modes and Packages in Emacs 24.4
275 *** CUA-mode was changed to make use of delete-selection-mode and
276 shift-select-mode. So you can now enable it independently from
277 transient-mark-mode, delete-selection-mode, and shift-select-mode.
278 As a result, cua-highlight-region-shift-only is obsolete
279 (you can disable transient-mark-mode to get the same result).
280 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
282 ** `delete-selection-mode' can be used without transient-mark-mode.
284 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
286 ** SMIE indentation can be customized via `smie-config'.
287 The customization can be guessed by Emacs by providing a sample indented
288 file and letting SMIE learn from it.
290 ** sh-script now uses its SMIE indentation algorithm by default.
292 ** If your Emacs is compiled with libxml2 support, you can use the new
293 built-in web browser `eww'.
295 ** `remember' can now store notes in separates files
296 You can use the new function `remember-store-in-files' within the
297 `remember-handler-functions' option.
299 See `remember-data-directory' and `remember-directory-file-name-format'
300 for new options related to this function.
302 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
304 ~/.emacs.d/timelog replaces ~/.timelog
305 ~/.emacs.d/vip replaces ~/.vip
306 ~/.emacs.d/viper replaces ~/.viper
307 ~/.emacs.d/ido.last replaces ~/.ido.last
308 ~/.emacs.d/kkcrc replaces ~/.kkcrc
309 ~/.emacs.d/quickurls replaces ~/.quickurls
310 ~/.emacs.d/idlwave replaces ~/.idlwave
311 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
312 ~/.emacs.d/places replaces ~/.emacs-places
313 ~/.emacs.d/shadows replaces ~/.shadows
314 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
315 ~/.emacs.d/strokes replaces ~/.strokes
316 ~/.emacs.d/notes replaces ~/.notes
317 ~/.emacs.d/type-break replaces ~/.type-break
318 Also the following files used by the now obsolete otodo-mode.el:
319 ~/.emacs.d/todo-do replaces ~/.todo-do
320 ~/.emacs.d/todo-done replaces ~/.todo-done
321 ~/.emacs.d/todo-top replaces ~/.todo-top
324 ** Delphi mode is now called OPascal mode.
325 *** All delphi-* variables and functions have been renamed to opascal-*.
326 *** `delphi-newline-always-indents' is not supported any more.
327 Use `electric-indent-mode' instead.
328 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
330 ** Eldoc Mode works properly in the minibuffer.
332 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
334 ** completing-read-multiple's separator can now be a regexp.
335 The default separator is changed to allow surrounding spaces around the comma.
337 ** The backtrace debugger and local variables:
338 *** The debugger's `e' command evaluates the code in the context at point.
339 This includes using the lexical environment at point, which means that
340 `e' now lets you access lexical variables as well.
341 *** The backtrace debugger can display local vars with `v'.
345 *** Battery information via the BSD `apm' utility is now supported.
349 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
351 ** Calendar and Diary
353 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
354 `calendar-month-header'.
356 *** New option `calendar-day-header-array'.
358 *** The variable `calendar-font-lock-keywords' is obsolete.
361 *** New variable `diary-from-outlook-function', used by the command
362 `diary-from-outlook'.
364 ** VC and related modes
366 *** In VC directory mode, `D' displays diffs between VC-controlled
367 whole tree revisions.
369 *** In VC directory mode, `L' lists the change log for the current VC
370 controlled tree in a window.
372 *** In VC directory mode, `I' shows a log of changes that will be
373 received with a pull operation.
375 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
376 under current version control system. When called with a prefix
377 argument, you can remove a file from the ignored file list.
379 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
380 because it is moved to vc-cvs.el.
384 *** New macro cl-tagbody.
387 *** letf is now just an alias for cl-letf.
391 *** Calc by default now uses the Gregorian calendar for all dates, and
392 uses January 1, 1 AD as its day number 1. Previously Calc used the
393 Julian calendar for dates before September 14, 1752, and it used
394 December 31, 1 BC as its day number 1; the new scheme is more
395 consistent with Calendar's calendrical system and day numbering.
397 *** The new variable `calc-gregorian-switch' lets you configure the
398 date when Calc switches from the Julian to the Gregorian calendar.
399 Nil, the default value, means to always use the Gregorian calendar.
400 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
403 *** Support for ISO 8601 dates.
407 *** `desktop-auto-save-timeout' defines the number of seconds idle time
408 before auto-save of the desktop.
410 *** `desktop-restore-frames', enabled by default, allows saving and
411 restoring the frame/window configuration (frameset). Additional options
412 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
413 and `desktop-restore-forces-onscreen' offer further customization.
417 *** New minor mode `dired-hide-details-mode' hides details.
421 *** New option `erc-accidental-paste-threshold-seconds'.
422 If set to a number, this can be used to avoid accidentally paste large
423 amounts of data into the ERC input.
427 *** New option `epa-mail-aliases'.
429 You can set this to a list of alias expansions for keys to use
430 in `epa-mail-encrypt'.
432 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
433 that means: when one of the recipients of the message being encrypted
434 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
436 If one element of the variable's value is ("foo@bar.com"),
437 that means: when one of the recipients of the message being encrypted
438 is `foo@bar.com', ignore that name as regards encryption.
439 This is useful to avoid a query when you have no key for that name.
442 ** New F90 mode option `f90-smart-end-names'.
444 ** Icomplete is a bit more like Ido.
445 *** key bindings to navigate through and select the completions.
446 *** The icomplete-separator is customizable, and its default has changed.
447 *** Removed icomplete-show-key-bindings.
448 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
449 (setq icomplete-with-completion-tables '(internal-complete-buffer))
450 will revert to the old behavior.
453 ** New features for Octave mode:
454 *** Font locking for texinfo comments and new keywords
455 *** Completion in Octave file buffers
457 *** Jump to definition
458 *** Documentation lookup/search
459 *** Code cleanup and various bug fixes
462 *** Ido has a manual now.
463 *** `ido-use-virtual-buffers' takes a new value 'auto.
464 *** `ido-decorations' has been slightly extended to give a bit more control.
468 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
469 visit the next image file and the previous image file in the same
470 directory, respectively.
472 *** New commands to show specific frames of multi-frame images.
473 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
474 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
476 *** New commands to speed up, slow down, or reverse animation.
479 *** The command `image-mode-fit-frame' deletes other windows.
480 When toggling, it restores the frame's previous window configuration.
481 It also has an optional frame argument, which can be used by Lisp
482 callers to fit the image to a frame other than the selected frame.
486 *** New face `info-index-match' is used to highlight matches in index
487 entries displayed by `Info-index-next', `Info-virtual-index' and
492 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
493 will cycle through faces in `hi-lock-face-defaults' without prompting.
496 *** New global command `M-s h .' (`highlight-symbol-at-point')
497 highlights the symbol found near point without prompting,
498 using the next face automatically.
500 ** Search and Replace
502 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
503 starts a symbol (identifier) incremental search forward with the
504 symbol found near point added to the search string initially.
506 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
507 and adds it to the search string.
509 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
510 between nil and the value of the option `search-invisible' (or `open'
513 *** `query-replace' skips invisible text when `search-invisible' is nil,
514 and opens overlays with hidden text when `search-invisible' is `open'.
516 *** A negative prefix arg of replacement commands replaces backward.
517 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
518 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
521 *** By default, prefix arguments do not now terminate Isearch mode.
522 Set `isearch-allow-prefix' to nil to restore old behavior.
524 *** More Isearch commands accept prefix arguments, namely
525 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
528 *** Word search now matches whitespace at the beginning/end
529 of the search string if it contains leading/trailing whitespace.
530 In an incremental word search or when using a non-nil LAX argument
531 of `word-search-regexp', the lax matching can also match part of
532 the first word (in addition to the lax matching of the last word).
533 The same rules are now applied to the symbol search with the difference
534 that it matches symbols, and non-symbol characters between symbols.
536 ** MH-E has been updated to MH-E version 8.5.
537 See MH-E-NEWS for details.
540 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
541 Customize `unrmail-mbox-format' to change this.
544 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
545 of how Rmail displays non-MIME messages.
548 ** New function `ses-rename-cell' to give SES cells arbitrary names.
550 ** trace-function was largely rewritten.
551 New features include:
552 - no prompting for the destination buffer, unless a prefix-arg was used.
553 - additionally to prompting for a destination buffer, when a prefix-arg is
554 used, the user can enter a "context", i.e. Lisp expression whose value at the
555 time the function is entered/exited will be printed along with the function
556 name and arguments. Useful to trace the value of (current-buffer) or
557 (point) when the function is invoked.
559 ** New command `delete-duplicate-lines' has new types of operation:
560 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
561 it works like the utility `uniq'. Otherwise by default it deletes
562 duplicate lines everywhere in the region without regard to adjacency.
563 When its arg KEEP-BLANKS is non-nil (when called interactively with
564 C-u C-u C-u), duplicate blank lines are preserved.
566 ** New `cycle-spacing' command allows cycling between having just one
567 space, no spaces, or reverting to the original spacing. Like
568 `just-one-space' command it can handle or ignore newlines and
569 leave different number of spaces.
571 ** Todo mode has been rewritten and enhanced.
572 New features include:
573 - support for multiple todo files and archive files of done items;
574 - renaming, reordering, moving, merging, and deleting categories;
575 - sortable tabular summaries of categories and the types of items they contain;
576 - cross-category lists of items filtered by specific criteria;
577 - more fine-grained interaction with the Emacs diary, by being able to decide
578 for each todo item whether it appears in the Fancy Diary display;
579 - highly flexible new item insertion and item editing;
580 - moving items between categories, storing done items in their category or in
581 archive files, undoing or unarchiving done items;
582 - reprioritizing items by inputting a numerical priority;
583 - extensive customizability of operation and display, including numerous faces.
584 The Todo mode user manual describes all commands and most user options.
585 To support some of these features, a new file format is used, which is
586 incompatible with the old format; however, you can convert old todo and done
587 item files to the new format on initializing the first new todo file, or at any
588 later time with the provided conversion command. The old version of
589 todo-mode.el has been made obsolete and renamed otodo-mode.el.
593 *** The experimental url syntax for remote file names is withdrawn.
596 *** New connection method "adb", which allows to access Android
597 devices by the Android Debug Bridge. The variable `tramp-adb-program'
598 can be used to adapt the path of the "adb" program, if needed.
600 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
601 "scpc" and "rsyncc" are discontinued. The ssh option
602 "ControlMaster=auto" is set automatically in all ssh-based methods,
606 *** Handlers for `file-acl' and `set-file-acl' for remote machines
607 which support POSIX ACLs.
610 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
611 for remote machines which support filesystem notifications.
615 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
617 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
621 *** The commands `woman-default-faces' and `woman-monochrome-faces'
622 are obsolete. Customize the `woman-*' faces instead.
627 *** `eshell' now supports visual subcommands and options
628 Eshell has been able to handle "visual" commands (interactive,
629 non-line oriented commands such as top that require display
630 capabilities not provided by eshell) by running them in an Emacs
631 terminal emulator. See `eshell-visual-commands'.
633 This feature has been extended to subcommands and options that make a
634 usually line-oriented command a visual command. Typical examples are
635 "git log" and "git <command> --help" which display their output in a
636 pager by default. See `eshell-visual-subcommands' and
637 `eshell-visual-options'.
640 *** Added Eshell-Tramp module
641 External su and sudo commands are now the default; the internal,
642 Tramp-using variants can still be used by enabling the eshell-tramp
647 *** The format of `archive-contents' files, generated by package
648 repositories, has changed to allow a new (fifth) element in the data
649 vectors, containing an associative list with extra properties.
651 *** `describe-package' buffer uses the `:url' extra property to
652 display a `Homepage' header, if it's present.
654 ** New term.el option `term-suppress-hard-newline'.
660 **** The cpp-root project now supports executing a compile command.
661 It can be set through the new :compile-command slot or the
662 buffer-local variable `compile-command'.
664 **** Better selection of include directories for the 'linux' project.
665 Include directories now support out-of-tree build directories and
666 target architecture auto-detection.
670 **** Improved detection of used namespaces in current scope in C++.
672 **** Parsing of default values for variables and function arguments in C/C++.
673 They are also displayed by the summarize feature in the modeline.
675 **** Improved parsing of function pointers in C/C++.
676 This also includes parsing of function pointers as function arguments.
678 **** Parsing of C/C++ preprocessor macros which open new scope.
679 For example, this enables parsing of macros which open new namespaces.
681 **** Support for 'this' pointer in inline member functions in C++.
683 ** Obsolete packages:
685 *** Iswitchb is made obsolete by icomplete-mode.
687 *** longlines.el is obsolete; use visual-line-mode instead.
692 *** terminal.el is obsolete; use term.el instead.
694 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
699 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
702 *** The Info-edit command is obsolete. Editing Info nodes by hand
703 has not been relevant for some time.
707 *** `explicit-bash-args' now always defaults to use --noediting.
708 During initialization, Emacs no longer expends a process to decide
709 whether it is safe to use Bash's --noediting option. These days
710 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
713 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
717 *** New option `imenu-generic-skip-comments-and-strings'.
721 *** New option `ruby-encoding-magic-comment-style'.
723 *** New option `ruby-custom-encoding-magic-comment-template'.
727 *** Improved syntax highlighting and indentation.
729 *** Add more Ruby file types to `auto-mode-alist'.
731 *** New option `ruby-align-to-stmt-keywords'.
735 *** Better indentation of multiple-variable declarations.
736 If declaration spans several lines, variables on the following lines
737 are lined up to the first one.
739 *** We now recognize and better indent continuations in array
742 *** New option `js-switch-indent-offset`.
745 * New Modes and Packages in Emacs 24.4
747 ** New `superword-mode' in subword.el
748 `superword-mode' overrides the default word motion commands to treat
749 symbol_words as a single word, similar to what `subword-mode' does and
750 using the same internal functions.
752 ** New nadvice.el package offering lighter-weight advice facilities.
754 - add-function/remove-function which can be used to add/remove code on any
755 function-carrying place, such as process-filters or `<foo>-function' hooks.
756 - advice-add/advice-remove to add/remove a piece of advice on a named function,
757 much like `defadvice' does.
759 ** New frameset.el package.
760 It provides a set of operations to save a frameset (the state of all
761 or a subset of the existing frames and windows, somewhat similar to a
762 frame configuration), both in-session and persistently, and restore it
763 at some point in the future.
766 ** The package filenotify.el provides an interface for file system
767 notifications. It requires, that Emacs is compiled with one of the
768 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
771 * Incompatible Lisp Changes in Emacs 24.4
773 ** `kill-region' lost its `yank-handler' optional argument.
775 ** `(input-pending-p)' no longer runs other timers which are ready to
776 run. The new optional CHECK-TIMERS param allows for the prior behavior.
778 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
780 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
781 Some languages match those as »...« and others as «...» so better stay neutral.
783 ** The default file coding for Emacs Lisp files is now utf-8.
784 (See file-coding-system-alist.) In most cases, this change is transparent, but
785 files that contain unusual characters without specifying an explicit coding
786 system may fail to load with obscure errors.
787 You should either convert them to utf-8 or add an explicit `coding:' cookie.
789 ** overriding-terminal-local-map does not replace the local keymaps any more.
790 It used to disable the minor mode, major mode, and text-property keymaps,
791 whereas now it simply has higher precedence.
793 ** Default process filters and sentinels are not nil any more.
794 Instead they default to a function which does what the nil value used to do.
796 ** `read-event' does not return decoded chars in ttys any more.
797 Just as was the case in Emacs-22 and before, decoding of tty input according to
798 keyboard-coding-system is not performed in read-event any more. But contrary
799 to that past, it is still done before input-decode-map/function-key-map/...
801 ** Removed inhibit-local-menu-bar-menus.
803 ** frame-local variables that affect redisplay do not work any more.
804 More specifically, the redisplay does not bother to check for a frame-local
805 value when looking up variables.
807 ** nil and "unbound" are indistinguishable in symbol-function.
808 `symbol-function' never signals `void-function' any more.
809 `fboundp' returns non-nil if the symbol was `fset' to nil.
811 ** `defadvice' does not honor the `freeze' flag and cannot advise
812 special-forms any more.
814 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
815 VAR was bound to nil which was not tremendously useful and just lead to
816 spurious warnings about an unused var.
818 ** The return value of `backup-buffer' has changed.
819 The second argument is no longer an SELinux context, instead it is an
820 alist of extended attributes as returned by the new function
821 `file-extended-attributes'. The attributes can be applied to another
822 file using `set-file-extended-attributes'.
824 ** `visited-file-modtime' now returns -1 for nonexistent files.
825 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
826 in the presence of files with negative time stamps.
828 ** The cars of the elements in `interpreter-mode-alist' are now treated
829 as regexps rather than literal strings. Technically this is an
830 incompatible change, but unless you are using interpreter-mode-alist
831 for something (not just adding elements to it), it ought not to affect you.
834 * Lisp Changes in Emacs 24.4
836 ** New option `load-prefer-newer', if non-nil, means that when both
837 .el and .elc versions of a file exist, rather than `load' always
838 choosing the .elc version, it will choose whichever is newer
839 (unless you explicitly specify one or the other).
841 ** New function get-pos-property.
843 ** New hook `pre-redisplay-function'.
846 ** Functions that pop up menus and dialogs now work on all terminal types,
848 This includes `x-popup-menu', `x-popup-dialog', `message-box',
851 The function `display-popup-menus-p' will now return non-nil for a
852 display or frame whenever a mouse is supported on that display or
855 ** New bool-vector set operation functions:
856 *** `bool-vector-exclusive-or'
857 *** `bool-vector-union'
858 *** `bool-vector-intersection'
859 *** `bool-vector-set-difference'
860 *** `bool-vector-not'
861 *** `bool-vector-subsetp'
862 *** `bool-vector-count-consecutive'
863 *** `bool-vector-count-population'
865 ** Comparison functions =, <, >, <=, >= now take many arguments.
867 ** The second argument of `eval' can now be a lexical-environment.
869 ** `with-demoted-errors' takes an additional argument `format'.
871 ** New function `define-error'.
873 ** New hook `tty-setup-hook'.
876 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
878 ** New library subr-x.el for misc helper functions
879 *** `hash-table-keys'
880 *** `hash-table-values'
885 *** `string-trim-left'
886 *** `string-trim-right'
889 ** Obsoleted functions:
892 *** `lisp-complete-symbol'
894 *** `minibuffer-completion-contents'
895 *** `isearch-nonincremental-exit-minibuffer'
896 *** `isearch-filter-visible'
897 *** `generic-make-keywords-list'
899 ** `with-wrapper-hook' is obsoleted by `add-function'.
900 The few hooks that used with-wrapper-hook are replaced as follows:
901 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
902 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
903 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
905 ** `byte-compile-interactive-only-functions' is now obsolete.
906 It has been replaced by the symbol property 'interactive-only.
908 ** `split-string' now takes an optional argument TRIM.
909 The value, if non-nil, is a regexp that specifies what to trim from
910 the start and end of each substring.
912 ** New function `string-suffix-p'.
914 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
916 ** Support for filesystem notifications.
917 Emacs now supports notifications of filesystem changes, such as
918 creation, modification, and deletion of files. This requires the
919 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
920 MS-Windows systems, this is supported for Windows XP and newer
923 ** Changes in autorevert.el
926 *** If Emacs is compiled with file notification support, notifications
927 are used instead of checking the time stamp of the files. You can
928 disable this by setting the user option `auto-revert-use-notify' to
929 nil. Alternatively, a regular expression of directories to be
930 excluded from file notifications can be specified by
931 `auto-revert-notify-exclude-dir-regexp'.
934 *** The new user option `auto-revert-remote-files' enables reversion
935 of remote files when set to non-nil.
939 *** The function `face-spec-set' is now analogous to `setq' for face specs.
940 Its third arg now accepts values specifying exactly which face spec to
941 set (defface, custom, or user spec), and it directly sets the relevant
942 property using the supplied face spec.
944 *** Face specs set via Custom themes now replace the `defface' spec
945 rather than inheriting from it (as do face specs set via Customize).
947 *** New face characteristic (supports :underline (:style wave))
948 specifies whether or not the terminal can display a wavy line.
950 *** New face spec attribute :distant-foreground
951 specifies foreground to use if background color is near the foreground
952 color that would otherwise have been used.
957 *** `image-animated-p' is now `image-multi-frame-p'.
958 It returns non-nil for any image that contains multiple frames,
959 whether or not it specifies a frame delay.
962 *** When animating images that do not specify a frame delay,
963 Emacs uses `image-default-frame-delay'.
966 *** New functions `image-current-frame' and `image-show-frame' for getting
967 and setting the current frame of a multi-frame image.
969 *** You can change the speed of animated images.
973 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
974 **** object-name -> eieio-object-name
975 **** object-class -> eieio-object-class
976 **** object-class-fast -> eieio--object-class
977 **** object-name-string -> eieio-object-name-string
978 **** object-num-slots -> eieio--object-num-slots
979 **** object-set-name-string -> eieio-object-set-name-string
980 **** class-parent -> eieio-class-parent
981 **** class-parents -> eieio-class-parents
982 **** class-children -> eieio-class-children
983 **** class-num-slots -> eieio--class-num-slots
984 **** class-precedence-list -> eieio-class-precedence-list
985 **** All generated class-* and object-* field accessors are now
986 prefixed with `eieio-' as well.
988 *** Obsoleted functions:
990 **** class-direct-subclasses
991 **** class-direct-superclasses
993 ** Changes in encoding and decoding of text
996 *** New coding-system `prefer-utf-8'.
997 This is like `undecided' but prefers UTF-8 on decoding if the text to
998 be decoded does not contain any invalid UTF-8 sequences. On encoding,
999 any non-ASCII characters are automatically encoded as UTF-8.
1002 *** New attributes of coding-systems whose type is `undecided'.
1003 Two new attributes, `:inhibit-null-byte-detection' and
1004 `:inhibit-iso-escape-detection', determine how to detect encoding of
1005 text that includes null bytes and ISO-2022 escape sequences,
1006 respectively. Each of these attributes can be either nil, zero, or
1007 t. If it is t, decoding text ignores null bytes and, respectively,
1008 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1009 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1010 text is encoded in one of the ISO-2022 encodings, such as
1011 iso-2022-7bit. If the value is zero, Emacs consults the variables
1012 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1014 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1015 UTF-8 encoding and decoding, whenever possible.
1017 These attributes are only meaningful for coding-systems of type
1018 `undecided'. (The type of a coding-system is determined by its
1019 `:coding-type' attribute and can be accessed by calling the
1020 `coding-system-type' function.)
1022 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
1023 with the same interpretation as the returned value of `visited-file-modtime'.
1025 ** time-to-seconds is not obsolete any more.
1026 ** New functions special-form-p and macrop.
1027 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1028 text-property on the first char.
1030 ** The `defalias-fset-function' property lets you catch calls to defalias
1031 and redirect them to your own function instead of `fset'.
1033 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1034 When you edit DIR/FILE, Emacs normally creates a symbolic link
1035 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1036 is being edited. Formerly, if there was already a non-symlink file
1037 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1038 through DIR/.#FILE.9. These fallbacks have been removed, so that
1039 Emacs now no longer locks DIR/FILE in that case.
1041 On file systems that do not support symbolic links, the lock is now a
1042 regular file with contents being what would have been in the symlink.
1044 ** The 9th element returned by `file-attributes' is now unspecified.
1045 Formerly, it was t if the file's gid would change if file were deleted
1046 and recreated. This value has been inaccurate for years on many
1047 platforms, and nobody seems to have noticed or cared.
1049 ** The function `file-ownership-preserved-p' now has an optional
1050 argument GROUP which causes it check for file group too. This can be
1051 used in place of the 9th element of `file-attributes'.
1053 ** New functions `group-gid' and `group-real-gid'.
1055 ** The 6th argument to `copy-file' has been renamed to
1056 `preserve-extended-attributes' as it now handles both SELinux context
1059 ** The `common-substring' argument of display-completion-list is obsolete.
1060 Either use `completion-all-completions' which already returns highlighted
1061 strings (including for partial or substring completion) or call
1062 `completion-hilit-commonality' to add the highlight.
1064 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1066 *** The package descriptor and name of global variables, constants,
1067 and functions should be separated by two hyphens if the symbol is not
1068 meant to be used by other packages.
1071 * Changes in Emacs 24.4 on Non-Free Operating Systems
1073 ** The procedure for building Emacs on MS-Windows has changed.
1074 It is now built by running the same configure script as on all other
1075 platforms. This requires the MSYS environment and MinGW development
1076 tools. See the updated instructions in nt/INSTALL for details.
1078 Using the Posix configure script and Makefile's also means a change in
1079 the directory structure of the Emacs installation on Windows. It is
1080 now the same as on GNU and Unix systems. In particular, the auxiliary
1081 programs, such as cmdproxy.exe and hexl.exe, are in
1082 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1083 version), version-independent site-lisp is in share/emacs/site-lisp,
1084 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1085 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1086 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1087 directories and will find the files in there automatically; there's no
1088 need to set any variables due to this change.)
1091 ** Emacs on Windows 2000 and later can now access files and directories
1092 whose names cannot be encoded in the current system codepage.
1094 The new variable `w32-unicode-filenames' controls this feature: if it
1095 is t, Emacs uses Unicode APIs to pass file names to system calls,
1096 which lifts the limitation of file names to the current locale.
1099 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1100 The backtrace is written to the 'emacs_backtrace.txt' file in the
1101 directory where Emacs was running.
1104 ** The variable `buffer-file-type' is no longer supported.
1105 Setting it has no effect, and %t in the mode-line format is ignored.
1106 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1107 modifying it has no effect.
1110 ** Lock files now work on MS-Windows.
1111 This allows to avoid losing your edits if the same file is being
1112 edited in another Emacs session or by another user. See the node
1113 "Interlocking" in the Emacs User Manual for the details. To disable
1114 file locking, customize `create-lockfiles' to nil.
1116 ** Improved fullscreen support on Mac OS X.
1117 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1118 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1119 native is the default.
1122 * Installation Changes in Emacs 24.3
1124 ** The default X toolkit is now Gtk+ version 3.
1125 If you don't pass `--with-x-toolkit' to configure, or if you use
1126 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1127 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1128 You can explicitly require a specific version by passing
1129 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1131 ** New configure option `--enable-link-time-optimization', to utilize
1132 an appropriate feature provided by GCC since version 4.5.0.
1134 ** New configure option `--without-all' to disable most of the optional
1135 features (image support, etc.) that are normally enabled by default.
1137 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1138 Emacs). If building with GCC, this enables compile-time checks that
1139 warn/give errors about possibly-questionable C code. On a recent GNU
1140 system there should be no warnings; on older and on non-GNU systems
1141 the results may be useful to developers.
1143 ** The configure option `--enable-use-lisp-union-type' has been
1144 renamed to `--enable-check-lisp-object-type', as the resulting
1145 Lisp_Object type no longer uses a union to implement the compile time
1146 check that this option enables.
1148 ** The configure option `--disable-maintainer-mode' has been removed,
1149 as it was confusingly-named and rarely useful.
1151 ** The configure options `--program-prefix', `--program-suffix', and
1152 `--program-transform-name' apply to more than just the installed
1153 binaries. Now they also affect the man pages, icons, and the
1154 etc/emacs.desktop file; but not the info pages, since this would break
1155 links between the various manuals.
1157 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1158 overwriting "emacs" in the installation bin/ directory with a link
1161 ** Emacs uses libtinfo in preference to libncurses, if available.
1163 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1164 /usr/pkg/lib to the linker search path. You must add them yourself if
1167 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1168 (from the bin and libexec directories, respectively). The former is
1169 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1172 * Startup Changes in Emacs 24.3
1174 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1175 lisp/ directory. There should not be any there anyway. If you have
1176 been adding them there, put them somewhere else; e.g., site-lisp.
1178 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1181 * Changes in Emacs 24.3
1185 *** `C-h f' (`describe-function') can now perform autoloading.
1186 When this command is called for an autoloaded function whose docstring
1187 contains a key substitution construct, that function's library is
1188 automatically loaded, so that the documentation can be shown
1189 correctly. To disable this, set `help-enable-auto-load' to nil.
1191 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1192 even after their associated libraries have been loaded (and the
1193 autoloads have been redefined as functions).
1197 *** Images displayed via ImageMagick now support transparency and the
1198 :background image specification property.
1200 *** When available, ImageMagick support is automatically enabled.
1201 It is no longer necessary to call `imagemagick-register-types'
1202 explicitly to install ImageMagick image types; that function is called
1203 automatically at startup, or when customizing an imagemagick- option.
1205 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1206 ImageMagick to view images. (You must call `imagemagick-register-types'
1207 afterwards if you do not use customize to change this.)
1209 *** The new variable `imagemagick-enabled-types' also affects which
1210 ImageMagick types are treated as images. The function
1211 `imagemagick-filter-types' returns the list of types that will be
1214 *** ImageMagick images now support the :max-width and :max-height
1217 *** Some data types aren't auto-detected by ImageMagick. Adding
1218 :format to `create-image' may help if the content type is in the
1219 new variable `image-format-suffixes'.
1223 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1224 next and previous path separator, respectively.
1226 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1227 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1228 non-nil before enabling the mode.
1232 *** New option `mode-line-default-help-echo' specifies the help text
1233 (shown in a tooltip or in the echo area) for any part of the mode line
1234 that does not have its own specialized help text.
1236 *** You can now click mouse-3 in the coding system indicator to invoke
1237 `set-buffer-file-coding-system'.
1239 ** Server and client
1241 *** emacsclient now obeys string values for `initial-buffer-choice',
1242 if it is told to open a new frame without specifying any file to visit
1243 or expression to evaluate.
1245 *** New option `server-auth-key' specifies a shared server key.
1247 ** Emacs now generates backtraces on fatal errors.
1248 On encountering a fatal error, Emacs now outputs a textual description
1249 of the fatal signal, and a short backtrace on platforms like glibc
1250 that support backtraces.
1252 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1253 This minor mode replaces `toggle-read-only', which is now obsolete.
1255 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1256 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1257 respectively, without exiting from the prompt.
1259 ** In the Package Menu, newly-available packages are listed as "new",
1260 and sorted above the other "available" packages by default.
1262 ** If your Emacs was built from a bzr checkout, the new variable
1263 `emacs-bzr-version' contains information about the bzr revision used.
1265 ** New option `create-lockfiles' specifies usage of lockfiles.
1266 It defaults to t. Changing it to nil inhibits the creation of lock
1267 files (use this with caution).
1269 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1270 variables on remote hosts.
1272 ** The entry for PCL-CVS has been removed from the Tools menu.
1273 The PCL-CVS commands are still available via the keyboard.
1275 ** Using "unibyte: t" in Lisp source files is obsolete.
1276 Use "coding: raw-text" instead.
1278 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1279 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1280 The previous binding, introduced in Emacs 24.1, was a mistake, because
1281 `C-c LETTER' bindings are reserved for user customizations.
1283 ** Internationalization
1285 *** New language environment: Persian.
1287 *** New input method `vietnamese-vni'.
1289 ** Nextstep (GNUstep / Mac OS X) port
1291 *** Support for fullscreen and the frame parameter fullscreen.
1293 *** A file dialog is used for open/save operations initiated from the
1297 * Editing Changes in Emacs 24.3
1299 ** Search and Replace
1301 *** Non-regexp Isearch now performs "lax" space matching.
1302 Each sequence of spaces in the supplied search string may match any
1303 sequence of one or more whitespace characters, as specified by the
1304 variable `search-whitespace-regexp'. (This variable is also used by a
1305 similar existing feature for regexp Isearch.)
1307 *** New Isearch command `M-s SPC' toggles lax space matching.
1308 This applies to both ordinary and regexp Isearch.
1310 *** New option `replace-lax-whitespace'.
1311 If non-nil, `query-replace' uses flexible whitespace matching too.
1314 *** Global `M-s _' starts a symbol (identifier) incremental search,
1315 and `M-s _' in Isearch toggles symbol search mode.
1316 `M-s c' in Isearch toggles search case-sensitivity.
1318 ** Navigation commands
1320 *** New binding `M-g c' for `goto-char'.
1322 *** New binding `M-g TAB' for `move-to-column'.
1324 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1325 interactively with no prefix arg. Previously, it moved to column 1.
1327 ** New option `yank-handled-properties' allows processing of text
1328 properties on yanked text, in ways that are more general than just
1329 removing them (as is done by `yank-excluded-properties').
1331 ** New option `delete-trailing-lines' specifies whether
1332 M-x delete-trailing-whitespace should delete trailing lines at the end
1333 of the buffer. It defaults to t.
1335 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1337 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1338 `ucs-insert' is now an obsolete alias for `insert-char'.
1340 ** The `z' key no longer has a binding in most special modes.
1341 It used to be bound to `kill-this-buffer', but `z' is too easy to
1344 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1345 It copies the region-rectangle as the last rectangle kill.
1349 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1351 *** New option `register-separator' specifies the register containing
1352 the text to put between collected texts for use with
1353 M-x append-to-register and M-x prepend-to-register.
1356 * Changes in Specialized Modes and Packages in Emacs 24.3
1358 ** Common Lisp emulation (CL)
1360 *** CL's main entry is now (require 'cl-lib).
1361 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1362 i.e., all its definitions have the "cl-" prefix (and internal definitions
1363 use the "cl--" prefix).
1365 If `cl' provided a feature under the name `foo', then `cl-lib'
1366 provides it under the name `cl-foo' instead; with the exceptions of the
1367 few `cl' definitions that had to use `foo*' to avoid conflicts with
1368 pre-existing Elisp entities. These have been renamed to `cl-foo'
1369 rather than `cl-foo*'.
1371 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1372 provide the old, non-prefixed names. Some exceptions are listed below:
1374 *** `cl-flet' is not like `flet' (which is deprecated).
1375 Instead it obeys the behavior of Common-Lisp's `flet'.
1376 In particular, in cl-flet function definitions are lexically scoped,
1377 whereas in flet the scoping is dynamic.
1379 *** `cl-labels' is slightly different from `labels'.
1380 The difference is that it relies on the `lexical-binding' machinery
1381 (as opposed to the `lexical-let' machinery used previously) to capture
1382 definitions in closures, so such closures will only work if `lexical-binding'
1385 *** `cl-letf' is not exactly like `letf'.
1386 The only difference is in details that relate to some deprecated usage
1387 of `symbol-function' in place forms.
1389 *** `progv' was rewritten to use the `let' machinery.
1390 A side effect is that variables without corresponding values are bound
1391 to nil rather than being made unbound.
1393 *** The following methods of extending `setf' are obsolete
1394 (use features from gv.el instead):
1395 `define-modify-macro' (use `gv-letplace')
1396 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1397 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1398 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1402 *** Changes are now highlighted using the same color scheme as in
1403 modern VCSes. Deletions are displayed in red (new faces
1404 `diff-refine-removed' and `smerge-refined-removed', and new definition
1405 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1406 and `smerge-refined-added', and new definition of `diff-added').
1408 *** The variable `diff-use-changed-face' defines whether to use the
1409 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1410 changes in context diffs.
1412 *** The new command `diff-delete-trailing-whitespace' removes trailing
1413 whitespace introduced by a diff.
1415 ** Ediff now uses the same color scheme as Diff mode.
1419 A new version of python.el, which provides several new features, including:
1420 per-buffer shells, better indentation, Python 3 support, and improved
1421 shell-interaction compatible with iPython (and virtually any other
1424 *** Some user options have been replaced/renamed, including (old -> new):
1425 **** python-indent -> python-indent-offset
1426 **** python-guess-indent -> python-indent-guess-indent-offset
1427 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1428 **** python-use-skeletons -> python-skeleton-autoinsert
1430 *** Some user options have been removed, including:
1432 **** `python-indent-string-contents': Strings are never indented.
1434 **** `python-honour-comment-indentation':
1435 Comments are always considered as indentation markers.
1437 **** `python-continuation-offset': Indentation is automatically
1438 calculated in a pep8 compliant way depending on the context.
1440 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1441 Have no direct mapping as the shell interaction is completely different.
1443 **** `python-python-command', `python-jython-command':
1444 Replaced by `python-shell-interpreter'.
1446 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1447 `python-pdbtrack-minor-mode-string', `python-source-modes':
1450 *** Some commands have been replaced (old -> new):
1451 **** python-insert-class -> python-skeleton-class
1452 **** python-insert-def -> python-skeleton-def
1453 **** python-insert-for -> python-skeleton-for
1454 **** python-insert-if -> python-skeleton-if
1455 **** python-insert-try/except -> python-skeleton-try
1456 **** python-insert-try/finally -> python-skeleton-try
1457 **** python-insert-while -> python-skeleton-while
1458 **** python-find-function -> python-nav-jump-to-defun
1459 **** python-next-statement -> python-nav-forward-sentence
1460 **** python-previous-statement -> python-nav-backward-sentence
1461 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1462 **** python-end-of-defun-function -> python-nav-end-of-defun
1463 **** python-send-buffer -> python-shell-send-buffer
1464 **** python-send-defun -> python-shell-send-defun
1465 **** python-send-region -> python-shell-send-region
1466 **** python-send-region-and-go -> emulate with python-shell-send-region
1467 and python-shell-switch-to-shell
1468 **** python-send-string -> python-shell-send-string
1469 **** python-switch-to-python -> python-shell-switch-to-shell
1470 **** python-describe-symbol -> python-eldoc-at-point
1474 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1476 *** The D-Bus object manager interface is implemented.
1478 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1479 if their value does not fit into Emacs's integer range.
1481 *** The function `dbus-call-method' is now non-blocking.
1482 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1484 *** Signals can also be sent as unicast messages.
1486 *** The argument list of `dbus-register-signal' has been extended,
1487 according to the new match rule types of D-Bus.
1489 *** `dbus-init-bus' supports private connections.
1491 *** There is a new function `dbus-setenv'.
1493 ** `desktop-path' no longer includes the "." directory.
1494 Desktop files are now located in ~/.emacs.d by default.
1498 *** `dired-do-async-shell-command' executes each file sequentially
1499 if the command ends in `;' (when operating on multiple files).
1500 Otherwise, it executes the command on each file in parallel.
1502 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1503 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1506 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1507 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1508 mark/unmark/flag all files in the active region.
1510 *** The minibuffer default for `=' (`dired-diff') has changed.
1511 It is now the backup file for the file at point, if one exists.
1512 In Transient Mark mode the default is the file at the active mark.
1514 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1515 The global binding for `M-=', `count-words-region' is in effect.
1519 *** New module "notifications", which can send a notification when you
1520 receive a private message or your nickname is mentioned.
1522 *** ERC will look up server/channel names via auth-source and use any
1525 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1526 only applies to messages sent by lurkers.
1528 ** reStructuredText mode
1530 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1531 fontification, comment handling, and customization have all been revised
1534 *** Support for `imenu' and `which-function-mode'.
1536 *** The reStructuredText syntax is more closely covered.
1537 Sphinx support has been improved.
1539 *** `rst-insert-list' inserts new list or continues existing lists.
1541 *** A negative prefix argument always works for `rst-adjust'.
1543 *** The window configuration is reset after displaying a TOC.
1545 *** The constant `rst-version' describes the rst.el package version.
1549 *** Support for percent literals and recognition of regular expressions
1550 in method calls without parentheses with more methods, including Cucumber
1553 *** Improved syntax highlighting and indentation.
1555 *** New command `ruby-toggle-block', bound to `C-c {'.
1557 *** Some non-standard keybindings/commands have been removed:
1559 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1561 **** `ruby-mark-defun'; use `mark-defun'.
1563 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1564 appropriate settings for the variables `beginning-of-defun-function'
1565 and `end-of-defun-function'.
1567 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1568 `reindent-then-newline-and-indent' and `newline' have been removed.
1570 ** Shell Script mode
1572 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1574 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1576 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1580 *** The free software compiler GHDL is supported (and now the default).
1582 *** Support for the VHDL-AMS packages has been added/updated.
1584 *** Updated to the 2002 revision of the VHDL standard.
1586 *** Accepts \r and \f as whitespace.
1590 *** The faces used by Apropos are now directly customizable.
1591 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1592 see the `apropos' Custom group for details.
1594 *** The old options whose values specified faces to use have been removed
1595 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1599 *** This package has been rewritten to use Tabulated List mode.
1601 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1602 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1606 *** Algebraic simplification mode is now the default.
1607 To restrict to the limited simplifications given by the former
1608 default simplification mode, use `m I'.
1612 *** You can customize the header text that appears above each calendar month.
1613 See the variable `calendar-month-header'.
1615 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1617 *** The calendars produced by cal-html include holidays.
1618 Customize `cal-html-holidays' to change this.
1622 *** The major modes from the parser generators "Bovine" and "Wisent"
1623 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1624 are in `auto-mode-alist', and the corresponding manuals are included.
1628 **** Menu support for the "Configuration" feature. This allows users to
1629 choose the active configuration (such as debug or install) from the menu.
1631 **** New command `ede-set' to interactively set project-local variables.
1633 **** Support for compiling, debugging, and running in "generic" projects.
1635 **** Autoconf editing support for M4 macros with complex arguments.
1637 **** Compilation support for the "linux" project type.
1639 **** "simple" projects have been removed; use "generic" projects instead.
1643 **** Support for parsing #include statements inside a namespace in C/C++.
1645 **** Improved support for 'extern "C"' declarations in C/C++.
1647 **** The ability to ignore more common special C/C++ preprocessor symbols,
1648 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1649 If available, include cdefs.h as an additional source of preprocessor symbols.
1651 **** Improved C/C++ function pointer parsing.
1653 **** In Python, support for converting imports to include file names.
1655 **** Ability to dynamically determine the Python load path.
1657 **** Support for the Python 'WITH' and 'AT' keywords.
1659 **** Improved tooltip completion.
1663 **** The SRecode manual is now included.
1665 **** Tag generation supports constructor/destructor settings and system
1666 include differentiation.
1668 **** Addition of 'Framework' support: Frameworks are specified when a
1669 particular kind of library (such as Android) is needed in a common language
1672 **** Support for nested templates and let variables override based on priority.
1674 **** Support for merging tables from multiple related modes, such as
1675 default -> c++ -> arduino.
1677 ** Compile has a new option `compilation-always-kill'.
1681 *** `custom-reset-button-menu' now defaults to t.
1683 *** Non-option variables are never matched in `customize-apropos' and
1684 `customize-apropos-options' (i.e., the prefix argument does nothing for
1685 these commands now).
1689 *** The variables `term-default-fg-color' and `term-default-bg-color'
1690 are now deprecated in favor of the customizable face `term'.
1692 *** You can customize how to display ANSI terminal colors and styles
1693 by customizing the corresponding `term-color-<COLOR>',
1694 `term-color-underline' and `term-color-bold' faces.
1698 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1700 *** Remote processes are now also supported on remote MS-Windows hosts.
1704 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1705 Previously, this slot stored semicolon-separated attribute-value pairs
1706 appended to some imap URLs, but this is not compatible with RFC 3986.
1707 So now the `filename' slot stores the entire path and query components,
1708 and the `attributes' slot is always nil.
1710 *** New function `url-encode-url' for encoding a URI string.
1711 The `url-retrieve' function now uses this to encode its URL argument,
1712 in case that is not properly encoded.
1714 *** New command `url-cookie-list' displays all the current cookies, and
1715 allows deleting selected cookies.
1717 ** notifications.el supports now version 1.2 of the Notifications API.
1718 The function `notifications-get-capabilities' returns the supported
1721 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1722 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1723 `flymake-warning-bitmap'.
1725 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1726 specifying URL types that should be converted to remote file names at
1727 the FFAP prompt. The default is now '("ftp").
1729 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1730 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1732 ** New option `mouse-avoidance-banish-position' specifies where the
1733 `banish' mouse avoidance setting moves the mouse.
1735 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1736 closing brackets to be aligned with the line of the opening bracket.
1738 ** In Proced mode, new command `proced-renice' renices marked processes.
1740 ** New option `async-shell-command-buffer' specifies the buffer to use
1741 for a new asynchronous `shell-command' when the default output buffer
1742 `*Async Shell Command*' is already in use.
1744 ** SQL mode has a new option `sql-db2-escape-newlines'.
1745 If non-nil, newlines sent to the command interpreter will be escaped
1746 by a backslash. The default does not escape the newlines and assumes
1747 that the sql statement will be terminated by a semicolon.
1749 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1750 (and modes that derive from it), sorts the column at point, or the Nth
1751 column if a numeric prefix argument is given.
1753 ** `which-func-modes' now defaults to t, so Which Function mode, when
1754 enabled, applies to all applicable major modes.
1756 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1759 ** Follow mode no longer works by using advice.
1760 The option `follow-intercept-processes' has been removed.
1762 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1764 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1765 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1766 *** semantic-change-hooks -> semantic-change-functions
1767 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1768 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1769 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1770 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1771 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1772 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1773 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1774 *** rcirc-activity-hooks -> rcirc-activity-functions
1775 *** rcirc-print-hooks -> rcirc-print-functions
1776 *** dbus-event-error-hooks -> dbus-event-error-functions
1777 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1778 *** checkdoc-style-hooks -> checkdoc-style-functions
1779 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1780 *** archive-extract-hooks -> archive-extract-hook
1781 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1782 *** hfy-post-html-hooks -> hfy-post-html-hook
1783 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1784 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1785 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1786 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1788 ** Obsolete packages
1791 In most cases, assoc+member+push+delq work just as well.
1792 And in any case it's just a terrible package: ugly semantics, terrible
1793 inefficiency, and not namespace-clean.
1802 * Incompatible Lisp Changes in Emacs 24.3
1804 ** Docstrings starting with `*' no longer indicate user options.
1805 Only variables defined using `defcustom' are considered user options.
1806 The function `user-variable-p' is now an obsolete alias for
1807 `custom-variable-p'.
1809 ** The return values of `defalias', `defun' and `defmacro' have changed,
1810 and are now undefined. For backwards compatibility, `defun' and
1811 `defmacro' currently return the name of the newly defined
1812 function/macro, but this should not be relied upon.
1814 ** `random' by default now returns a different random sequence in
1815 every Emacs run. Use `(random S)', where S is a string, to set the
1816 random seed to a value based on S, in order to get a repeatable
1817 sequence in later calls.
1819 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1820 that substring is inserted literally even if the LITERAL arg is
1821 non-nil, instead of causing an error to be signaled.
1823 ** `select-window' now always makes the window's buffer current.
1824 It does so even if the window was selected before.
1826 ** The function `x-select-font' can return a font spec, instead of a
1827 font name as a string. Whether it returns a font spec or a font name
1828 depends on the graphical library.
1830 ** `face-spec-set' no longer sets frame-specific attributes when the
1831 third argument is a frame (that usage was obsolete since Emacs 22.2).
1833 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1835 ** The CL package's `get-setf-method' function no longer exists.
1836 Generalized variables are now part of core Emacs Lisp, and implemented
1837 differently to the way cl.el used to do it. It is not possible to
1838 define a compatible replacement for `get-setf-method'. See the file
1839 gv.el for internal details of the new implementation.
1841 ** The arguments of `dbus-register-signal' are no longer just strings,
1842 but keywords or keyword-string pairs. The old argument list will
1843 still be supported for Emacs 24.x.
1845 ** Miscellaneous name changes
1846 Some Lisp symbols have been renamed to correct their spelling,
1847 or to be more consistent with standard Emacs terminology.
1849 *** Renamed functions
1850 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1851 **** inactivate-input-method -> deactivate-input-method
1852 **** quail-inactivate -> quail-deactivate
1853 **** robin-inactivate -> robin-deactivate
1854 **** viper-inactivate-input-method -> viper-deactivate-input-method
1855 **** viper-inactivate-input-method-action ->
1856 viper-deactivate-input-method-action
1857 **** ucs-input-inactivate -> ucs-input-deactivate
1860 The old hooks are still supported for backward compatibility, but they
1861 are deprecated and will be removed eventually.
1862 **** input-method-inactivate-hook -> input-method-deactivate-hook
1863 **** robin-inactivate-hook -> robin-deactivate-hook
1864 **** quail-inactivate-hook -> quail-deactivate-hook
1866 *** Renamed variables
1867 **** follow-deactive-menu -> follow-inactive-menu
1868 **** inactivate-current-input-method-function ->
1869 deactivate-current-input-method-function
1871 ** Some obsolete functions, variables, and faces have been removed:
1872 *** `last-input-char', `last-command-char', `unread-command-char'
1873 *** `facemenu-unlisted-faces'
1874 *** `rmail-decode-mime-charset'
1875 *** `iswitchb-read-buffer'
1876 *** `sc-version', `sc-submit-bug-report'
1877 *** `set-char-table-default'
1878 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1879 *** `compile-internal'
1881 *** `mode-line-inverse-video'
1882 *** `follow-mode-off-hook'
1883 *** `cvs-commit-buffer-require-final-newline'
1884 (use `log-edit-require-final-newline' instead)
1885 *** `cvs-changelog-full-paragraphs'
1886 (use `log-edit-changelog-full-paragraphs' instead)
1887 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1888 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1889 *** `vc-master-templates' (use `vc-handled-backends' instead)
1890 *** `vc-checkout-carefully'
1893 * Lisp Changes in Emacs 24.3
1895 ** CL-style generalized variables are now in core Elisp.
1896 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1897 You can define your own generalized variables using `gv-define-simple-setter',
1898 `gv-define-setter', etc.
1900 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1901 This can significantly speed up execution of non-byte-compiled code,
1902 but can also bump into previously unnoticed cyclic dependencies.
1903 These are generally harmless: they will simply cause the macro calls
1904 to be left for later expansion (as before), but will result in a
1905 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1906 You may wish to restructure your code so this does not happen.
1908 ** New sampling-based Elisp profiler.
1909 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1910 When finished, use M-x profiler-stop. The sampling rate can be based on
1911 CPU time or memory allocations.
1913 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1914 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1916 ** New macros `setq-local' and `defvar-local'.
1918 ** Face underlining can now use a wave.
1920 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1921 of `read-regexp' accepts a string ending with a colon and space, and its
1922 second argument DEFAULTS can be a list of strings accessible via `M-n'
1923 in the minibuffer ahead of other hard-coded useful regexp-related values.
1924 More commands use `read-regexp' now to read their regexp arguments.
1928 *** New function `completion-table-with-quoting' to handle completion
1929 in the presence of quoting, such as file completion in shell buffers.
1931 *** New function `completion-table-subvert' to use an existing completion
1932 table, but with a different prefix.
1936 *** New error type and new function `user-error'.
1937 These do not trigger the debugger.
1939 *** New option `debugger-bury-or-kill', saying what to do with the
1940 debugger buffer when exiting debug.
1942 *** Set `debug-on-message' to enter the debugger when a certain
1943 message is displayed in the echo area. This can be useful when trying
1944 to work out which code is doing something.
1946 *** New var `inhibit-debugger', automatically set to prevent accidental
1947 recursive invocations.
1951 *** New command `fit-frame-to-buffer' adjusts the frame height to
1954 *** The command `fit-window-to-buffer' can adjust the frame height
1955 if the new option `fit-frame-to-buffer' is non-nil.
1957 *** New macro `with-temp-buffer-window', similar to
1958 `with-output-to-temp-buffer'.
1960 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1963 *** New option `switch-to-buffer-preserve-window-point' to restore a
1964 window's point when switching buffers.
1966 *** New display action function `display-buffer-no-window' to not
1967 display the buffer in a window.
1969 *** New display action alist entry `allow-no-window' to indicate the
1970 caller of `display-buffer' is ready to handle the case of not
1971 displaying the buffer in a window.
1973 *** New display action alist entries `window-height' and `window-width'
1974 specify the size of new windows created by `display-buffer'.
1976 *** New display action alist entry `pop-up-frame-parameters', if
1977 non-nil, specifies frame parameters to give any newly-created frame.
1979 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1980 tells display action functions to avoid changing which frame is
1983 *** New display action alist entry `previous-window', if non-nil,
1984 specifies window to reuse in `display-buffer-in-previous-window'.
1986 *** New display action functions `display-buffer-below-selected',
1987 and `display-buffer-in-previous-window'.
1989 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1990 now accept a third argument to avoid choosing the selected window.
1992 *** Additional values recognized for option `window-combination-limit'.
1994 *** The following variables are obsolete, as they can be replaced by
1995 appropriate entries in the `display-buffer-alist' function introduced
1997 **** `dired-shrink-to-fit'
1998 **** `display-buffer-reuse-frames'
1999 **** `display-buffer-function'
2000 **** `special-display-buffer-names'
2001 **** `special-display-frame-alist'
2002 **** `special-display-function'
2003 **** `special-display-regexps'
2007 *** `current-time-string' no longer requires that its argument's year
2008 must be in the range 1000..9999. It now works with any year supported
2009 by the underlying C implementation.
2011 *** `current-time' now returns extended-format time stamps
2012 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2013 PSEC is typically a multiple of 1000 on current machines. Other
2014 functions that use this format, such as `file-attributes' and
2015 `format-time-string', have been changed accordingly. Old-format time
2016 stamps are still accepted.
2018 *** The format of timers in `timer-list' and `timer-idle-list' is now
2019 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2020 The PSECS slot is new, and uses picosecond resolution. It can be
2021 accessed via the new `timer--psecs' accessor.
2023 *** Last-modified time stamps in undo lists now are of the form
2024 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2028 *** Improved security when handling persistent objects:
2030 **** `eieio-persistent-read' now features optional arguments for specifying
2031 the class to load, as well as a flag stating whether subclasses are allowed;
2032 if provided, other classes will be rejected by the reader. For
2033 compatibility with existing code, if the class is omitted only a
2036 **** New specialized reader for pulling in classes and signaling errors
2037 without evaluation of suspicious code.
2039 **** All slots that contain objects must have a :type. Slots with lists
2040 of objects must use a new type predicate for a list of an object type.
2042 *** Support for `find-function' and similar utilities, through the addition
2043 of filename support to generated symbols.
2045 ** Floating point functions now always return special values like NaN,
2046 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2047 Previously, they returned NaNs on some platforms but signaled errors
2048 on others. The affected functions are acos, asin, tan, exp, expt,
2049 log, log10, sqrt, and mod.
2051 ** New fringe bitmap `exclamation-mark'.
2053 ** Miscellaneous changes to special forms and macros
2055 *** `defun' and `defmacro' are now macros rather than special forms.
2057 *** `kbd' is now a function rather than a macro.
2059 ** Miscellaneous new functions
2061 *** `set-temporary-overlay-map' sets up a temporary keymap that
2062 takes precedence over most other maps for a short while (normally one key).
2064 *** `autoloadp' tests if its argument is an autoloaded object.
2066 *** `autoload-do-load' performs the autoloading operation.
2068 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2070 *** `file-name-base' returns a file name sans directory and extension.
2072 *** `function-get' fetches a function property, following aliases.
2074 *** `posnp' tests if an object is a `posn'.
2076 *** `system-users' returns the user names on the system.
2078 *** `system-groups' returns the group names on the system.
2080 *** `tty-top-frame' returns the topmost frame of a text terminal.
2082 ** The following functions and variables are obsolete:
2083 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2084 *** `buffer-has-markers-at'
2085 *** `macro-declaration-function' (use `macro-declarations-alist')
2086 *** `window-system-version' (provides no useful information)
2087 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2088 *** `query-replace-interactive'
2089 *** `font-list-limit' (has had no effect since Emacs < 23)
2092 * Changes in Emacs 24.3 on Non-Free Operating Systems
2094 ** Cygwin builds can use the native MS Windows user interface.
2095 Pass `--with-w32' to configure. The default remains the X11 interface.
2097 ** Two new functions are available in Cygwin builds:
2098 `cygwin-convert-file-name-from-windows' and
2099 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2100 code to access the Cygwin file-name mapping machinery to convert
2101 between Cygwin and Windows-native file and directory names.
2103 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2104 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2105 `mouse-autoselect-window'.
2107 ** On MS Windows Vista and later Emacs now supports symbolic links.
2109 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2110 support for libxml2, even if its presence is detected.
2112 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2114 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2115 directories to the search path. You must add them yourself if you want them.
2118 * Changes in Emacs 24.2
2120 ** This is mainly a bug-fix release.
2123 * Installation Changes in Emacs 24.1
2125 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2126 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2127 also depend on Gtk+. You can disable them with --without-rsvg and
2130 ** Emacs can be compiled with GnuTLS support.
2131 This happens by default if a suitably recent version of the library is
2132 found at build time. To prevent this, use the configure option
2133 `--without-gnutls'. See below for GnuTLS features.
2135 ** Emacs can be compiled with SELinux support.
2136 This happens by default if a suitably recent version of the library is
2137 found at build time. To prevent this, use the configure option
2138 `--without-selinux'. See below for SELinux features.
2140 ** Emacs can be compiled with ImageMagick support.
2141 This happens by default if a suitably recent version of the library is
2142 found at build time. To prevent this, use the configure option
2143 `--without-imagemagick'. See below for ImageMagick features.
2144 This feature is not available for the Nextstep or MS ports.
2146 ** Emacs can be compiled with libxml2 support.
2147 This happens by default if a suitably recent version of the library is
2148 found at build time. To prevent this, use the configure option
2149 `--without-xml2'. See below for libxml2 features.
2151 ** By default, the installed Info and man pages are compressed.
2152 You can disable this by configuring --without-compress-info.
2154 ** New configure option --with-wide-int.
2155 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2156 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2159 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2160 These provide no new functionality, they just remove the need to edit
2161 lib-src/Makefile by hand in order to use the associated features.
2163 ** New configure option --enable-use-lisp-union-type.
2164 This is only useful for Emacs developers to debug certain types of bugs.
2165 This is not a new feature; only the configure flag is new.
2167 ** The standalone programs digest-doc and sorted-doc are removed.
2168 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2170 ** The standalone program `fakemail' is removed.
2171 If you need it, feedmail.el provides a superset of the functionality.
2174 * Startup Changes in Emacs 24.1
2176 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2177 command line arguments, and the EMACS_UNIBYTE environment variable, no
2178 longer have any effect. (They were declared obsolete in Emacs 23.)
2180 ** New command line option `--no-site-lisp' removes site-lisp directories
2181 from load-path. -Q now implies this. This option does not affect the
2182 EMACSLOADPATH environment variable (and hence has no effect for
2186 * Changes in Emacs 24.1
2190 *** Many packages now use the `completion-at-point' command,
2191 rather than implementing separate completion commands.
2193 *** `completion-at-point' now handles tags and semantic completion.
2195 *** Completion in a non-minibuffer now tries to detect the end of completion
2196 and pops down the *Completions* buffer accordingly.
2198 *** New option `completion-cycle-threshold' allows completion cycling.
2200 *** New option `completion-category-overrides' for overriding the
2201 default completion style in certain circumstances.
2203 *** New completion style `substring'.
2205 *** Completion of buffer names uses `substring' completion by default.
2207 *** The option `widget-complete-field' has been removed.
2211 *** The first time you try sending mail, Emacs asks for a mail method.
2212 This is implemented by a new default for `send-mail-function', which
2213 is `sendmail-query-once'. This offers to use the smtpmail package, or
2214 to use the old defaults relying on external mail facilities
2215 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2216 `mailclient-send-it' on Windows).
2218 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2219 transfers the report to your desktop's preferred mail client, if there
2220 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2223 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2224 and Mail mode changes
2226 ** Emacs server and client changes
2228 *** New option `server-port' specifies the port for TCP Emacs servers.
2230 *** New emacsclient argument -q/--quiet suppresses some status messages.
2232 *** New emacsclient argument --frame-parameters specifies the frame
2233 parameters of any newly-created graphical frame.
2235 *** If emacsclient shuts down due to Emacs signaling an error,
2236 its exit status is 1.
2238 *** New emacsclient argument --parent-id ID.
2239 This opens a client frame in parent X window ID, via XEmbed, similar
2240 to the --parent-id argument to Emacs.
2242 ** Internationalization changes
2244 *** Emacs now supports display and editing of bidirectional text.
2245 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2246 displayed in the correct visual order as expected by users of those
2247 scripts. The display reordering is a "full bidirectionality" class
2248 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2249 with no RTL text should look exactly the same as before.
2251 **** New buffer-local variable `bidi-display-reordering'.
2252 To disable display reordering in a buffer, change this to nil.
2254 **** New buffer-local variable `bidi-paragraph-direction'.
2255 If nil (the default), Emacs determines the base direction of each
2256 paragraph from its text, as specified by the UBA. Setting the value
2257 to `right-to-left' or `left-to-right' forces a base direction on each
2260 Paragraphs with right-to-left base direction are displayed starting at
2261 the right window edge.
2263 *** Enhanced support for characters with no glyphs in available fonts,
2264 or, on text terminals, characters that cannot be encoded by the
2265 terminal coding system. The new option `glyphless-char-display-control'
2266 specifies how to display them: as a hexadecimal code in a box, a thin
2267 1-pixel space, an empty box, etc.
2269 *** New input methods for Farsi and Bulgarian
2270 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2272 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2273 (U+2010 and U+2011).
2275 *** New Hebrew translation of the Emacs Tutorial.
2276 Type `C-u C-h t' to choose it in case your language setup doesn't
2277 automatically select it.
2279 ** An Emacs Lisp package manager is now included.
2280 This is a convenient way to download and install additional packages,
2281 from a package repository at http://elpa.gnu.org.
2283 *** M-x list-packages shows a list of packages, which can be
2284 selected for installation.
2286 *** New command `describe-package', bound to `C-h P'.
2288 *** By default, all installed packages are loaded automatically when
2289 Emacs starts up. To disable this, set `package-enable-at-startup' to
2290 nil. To specify the packages to load, customize `package-load-list'.
2292 ** Custom theme changes
2294 *** New command `M-x customize-themes', which provides a convenient
2295 interface for enabling and disabling Custom themes.
2297 *** New option `custom-theme-load-path' is the load path for themes.
2298 Emacs no longer looks for Custom themes in `load-path'. The default
2299 value of `custom-theme-load-path' says to look for themes in
2300 `custom-theme-directory', followed by a subdirectory of
2301 `data-directory' named "themes/", which contains a small selection of
2302 built-in Custom themes.
2304 *** New option `custom-safe-themes' records known-safe theme files.
2305 If a theme is not in this list, Emacs queries before loading it, and
2306 offers to save the theme to `custom-safe-themes' automatically. By
2307 default, all themes included in Emacs are treated as safe.
2309 ** Improved GTK integration
2311 *** GTK scroll-bars are now placed on the right by default.
2312 The function `set-scroll-bar-mode' can change this.
2314 *** GTK tool bars can have just text, just images or images and text.
2315 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2316 the default is taken from desktop settings.
2318 *** GTK tool bars can be placed on any edge of the frame.
2319 The frame-parameter tool-bar-position controls this. It takes the
2320 values top, left, right or bottom. The Options => Show/Hide menu has
2323 *** The default colors for selected text (the `region' face) are taken
2324 from the GTK theme when Emacs is built with GTK.
2326 *** Emacs uses GTK tooltips by default if built with GTK.
2327 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2329 ** Graphical interface changes
2331 *** On graphical displays, the mode-line no longer ends in dashes.
2332 Also, the first dash (which does not indicate anything) is just
2333 displayed as a space.
2335 *** `menu-bar-select-buffer-function' lets you choose another operation
2336 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2338 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2339 built with Xft. These fonts can be set via X resources, for example:
2340 Emacs.pane.menubar.font: Courier-12
2344 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2345 or if it receives a SIGINT signal in batch mode.
2347 *** `kill-emacs-hook' is now also run in batch mode.
2348 Third-party code which adds to `kill-emacs-hook' should check if they
2349 do the right thing in batch mode.
2351 ** Scrolling changes
2353 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2354 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2355 of buffer at first key-press (instead they move to top/bottom of buffer)
2356 when `scroll-error-top-bottom' is non-nil.
2358 *** New option `scroll-error-top-bottom' (see above).
2360 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2361 scroll a line instead of full screen.
2363 *** New property `scroll-command' should be set on a command's symbol to
2364 define it as a scroll command affected by `scroll-preserve-screen-position'.
2366 *** If you customize `scroll-conservatively' to a value greater than 100,
2367 Emacs will never recenter point in the window when it scrolls due to
2368 cursor motion commands or commands that move point (e.f., `M-g M-g').
2369 Previously, you needed to use `most-positive-fixnum' as the value of
2370 `scroll-conservatively' to achieve the same effect.
2372 *** "Aggressive" scrolling now honors the scroll margins.
2373 If you customize `scroll-up-aggressively' or
2374 `scroll-down-aggressively' and move point off the window, Emacs now
2375 scrolls the window so as to avoid positioning point inside the scroll
2378 ** Basic SELinux support has been added.
2379 This requires Emacs to be linked with libselinux at build time.
2381 *** Emacs preserves the SELinux file context when backing up.
2382 Also, the function `copy-file' has an extra optional argument for
2383 preserving SELinux context, and the return value of `backup-buffer'
2384 now includes the SELinux context.
2386 *** New functions `file-selinux-context' and `set-file-selinux-context'
2387 get and set the SELinux context of a file.
2391 *** `delete-by-moving-to-trash' now only affects commands that specify
2392 trashing. This avoids inadvertently trashing temporary files.
2394 *** Calling `delete-file' or `delete-directory' with a prefix argument
2395 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2397 ** File- and directory-local variable changes
2399 *** You can stop directory local vars from applying to subdirectories.
2400 Add an element (subdirs . nil) to the alist portion of any variables
2401 settings to indicate that the section should not apply to
2404 *** Directory local variables can apply to some file-less buffers.
2405 Affected modes include dired, vc-dir, and log-edit. For example,
2406 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2407 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2408 `hack-dir-local-variables-non-file-buffer' to support this.
2410 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2411 Instead, use "eval: (minor-mode 1)".
2413 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2414 to `inhibit-local-variables-regexps'. As the name suggests, it now
2415 applies to ALL file local variables, not just -*- lines. The
2416 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2421 *** The `quit-window' command now restores the last buffer displayed
2422 in the quitted window.
2424 *** Resizing an Emacs frame now preserves proportional window sizes,
2425 modulo restrictions like window minimum sizes and fixed-size windows.
2427 *** The behavior of `display-buffer' is now customizable in detail.
2429 **** New option `display-buffer-base-action' specifies a list of
2430 user-determined display "actions" (functions and optional arguments
2431 for choosing the displaying window).
2433 This takes precedence over the default display action, which is
2434 specified by `display-buffer-fallback-action'.
2436 **** New option `display-buffer-alist' maps buffer name regexps to
2437 display actions, taking precedence over `display-buffer-base-action'.
2439 *** New option `window-combination-limit'.
2440 The new option `window-combination-limit' allows to return the space
2441 obtained for resizing or creating a window more reliably to the window
2442 from which such space was obtained.
2444 *** New option `window-combination-resize'.
2445 The new option `window-combination-resize' allows to split a window that
2446 otherwise cannot be split because it's too small by stealing space from
2447 other windows in the same combination. Subsequent resizing or deletion
2448 of the window will resize all windows in the same combination as well.
2450 *** New option `frame-auto-hide-function' lets you choose between
2451 iconifying or deleting a frame when burying a buffer in a dedicated
2452 frame, or quitting a window showing a buffer in a frame of its own.
2454 *** New commands `maximize-window' and `minimize-window'.
2455 These maximize and minimize the size of a window within its frame.
2457 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2458 These functions allow to navigate through the live buffers that have
2459 been shown in a specific window.
2461 ** Minibuffer changes
2463 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2464 This is handy for minibuffer-only frames, and is also used for the feature
2465 where mouse-1 pops up *Messages*"', which can now easily be changed.
2467 *** Minibuffers set `truncate-lines' to nil.
2468 If you want to change the value to something else, you could use
2469 for example `minibuffer-setup-hook'.
2471 ** `auto-mode-case-fold' is now enabled by default.
2473 ** `backup-by-copying-when-mismatch' now defaults to t.
2475 ** New basic faces `error', `warning', `success'.
2476 These are used to highlight text indicating failure, caution or
2477 successful operation.
2479 ** New option `list-colors-sort' defines the color sort order
2480 for `list-colors-display'.
2482 ** The variable `focus-follows-mouse' now always defaults to nil.
2485 * Editing Changes in Emacs 24.1
2489 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2490 `isearch-yank-line'.
2492 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2493 `isearch-yank-kill'.
2495 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2497 ** New commands `count-words-region' and `count-words'.
2499 *** M-= is bound to `count-words-region', not `count-lines-region'.
2500 The `count-words-region' command, when called interactively, reports
2501 the number of lines, words, and characters in the region. It is a
2502 superset of the old `count-lines-region', which is now an obsolete
2505 ** The command `just-one-space' (M-SPC), if given a negative argument,
2506 also deletes newlines around point.
2510 *** New option `delete-active-region'.
2511 If non-nil, [delete] and DEL delete the region if it is active and no
2512 prefix argument is given. If set to `kill', those commands kill
2515 *** New command `delete-forward-char', bound to [delete].
2516 This is meant for interactive use, and obeys `delete-active-region'.
2517 The command `delete-char' does not obey `delete-active-region'.
2519 *** `delete-backward-char' is now a Lisp function.
2520 Apart from obeying `delete-active-region', its behavior is unchanged.
2521 However, the byte compiler now warns if it is called from Lisp; Lisp
2522 callers should use delete-char with a negative argument instead.
2524 *** The option `mouse-region-delete-keys' has been deleted.
2526 ** Selection changes.
2528 The default handling of clipboard and primary selections has been
2529 changed to conform with modern X applications. In short, most
2530 commands for killing and yanking text now use the clipboard, while
2531 mouse commands use the primary selection.
2533 In the following, we provide a list of these changes, followed by a
2534 list of steps to get the old behavior back if you prefer that.
2536 *** `select-active-regions' now defaults to t.
2537 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2538 the kill ring. The selected text is put in the primary selection, if
2539 the system possesses a separate primary selection facility (e.g. X).
2541 **** `select-active-regions' also accepts a new value, `only'.
2542 This means to only set the primary selection for temporarily active
2543 regions (usually made by mouse-dragging or shift-selection);
2544 "ordinary" active regions, such as those made with C-SPC followed by
2545 point motion, do not alter the primary selection.
2547 **** `mouse-drag-copy-region' now defaults to nil.
2549 *** mouse-2 is now bound to `mouse-yank-primary'.
2550 This pastes from the primary selection, ignoring the kill-ring.
2551 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2553 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2555 *** `x-select-enable-primary' now defaults to nil.
2556 Thus, commands that kill text or copy it to the kill-ring (such as
2557 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2559 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2560 exactly equivalent to M-w, C-w, and C-y respectively.
2562 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2563 non-nil by default, as Windows does not support the primary selection
2564 between applications.
2566 *** To return to the previous behavior, do the following:
2568 **** Change `select-active-regions' to nil.
2569 **** Change `mouse-drag-copy-region' to t.
2570 **** Change `x-select-enable-primary' to t (on X only).
2571 **** Change `x-select-enable-clipboard' to nil.
2572 **** Bind `mouse-yank-at-click' to mouse-2.
2574 *** Support for X cut buffers has been removed.
2576 *** X clipboard managers are now supported.
2577 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2579 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2580 in the current rectangle. With a prefix argument, this prompts for a
2581 number to count from and for a format string.
2583 ** `redisplay-dont-pause' now defaults to t.
2584 This makes Emacs feel more responsive to editing commands that arrive
2585 at high rate, e.g. if you lean on some key, because stopping redisplay
2586 in the middle (when this variable is nil) forces more expensive
2587 updates later on, and Emacs appears to be unable to keep up.
2589 ** The behavior of <TAB> for active regions in Text mode has changed.
2590 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2591 when the region is active causes Emacs to indent all the lines in the
2592 region, aligning them with the line previous to the first line in the
2593 region (or with the left margin if there is no previous line).
2595 ** When `occur' is called with a prefix argument, matching strings are
2596 collected into the `*Occur*' buffer without line numbers. If there
2597 are parenthesized subexpressions in the specified regexp, `occur'
2598 reads replacement text that may contain \\& and \\N whose convention
2599 follows `replace-match'.
2602 * Changes in Specialized Modes and Packages in Emacs 24.1
2604 ** Archive Mode has basic support for browsing and updating 7z archives.
2608 *** BibTeX mode now supports biblatex.
2609 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2610 `bibtex-entry-field-alist' is now an obsolete alias for
2611 `bibtex-BibTeX-entry-alist'.
2613 *** New command `bibtex-search-entries', bound to C-c C-a.
2615 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2617 *** New variable `bibtex-search-entry-globally'.
2621 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2623 *** The default browser used by the package is now the "xdg-open" program,
2624 on platforms that support it. This calls your desktop's preferred browser.
2628 *** Support for musical notes.
2630 *** Support for logarithmic units.
2632 *** No longer uses the tex prefix for TeX specific unit names when
2633 using TeX or LaTeX mode.
2635 *** New option to highlight selections using faces.
2637 *** `calc-histogram' has the option of using a vector to determine the bins.
2639 *** New "O" option prefix.
2641 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2643 ** Calendar, Diary, and Appt
2645 *** Diary entries can contain non-printing "comments".
2646 See the variable `diary-comment-start'.
2648 *** Appointments can specify their individual warning times.
2649 See the variable `appt-warning-time-regexp'.
2651 *** The function specified by `appt-disp-window-function' may be passed
2652 lists of arguments if multiple appointments are due at similar times.
2653 If you are using a custom function for this, you should update it.
2655 *** New function `diary-hebrew-birthday'.
2657 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2658 may no longer be nil, but must all be strings.
2660 *** The obsolete (since Emacs 22.1) method of enabling the appt
2661 package by adding `appt-make-list' to `diary-hook' has been removed.
2662 Use `appt-activate' instead.
2664 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2665 appt-issue-message (use the function appt-activate)
2666 appt-visible/appt-msg-window (use the variable appt-display-format)
2668 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2669 view-diary-entries, list-diary-entries, show-all-diary-entries
2673 *** New feature to "guess" the style in an existing buffer.
2674 The main entry point is M-x c-guess.
2676 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2678 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2679 Thus C-M-a will, by default, go to the beginning of the immediate function,
2682 *** "Macros with semicolons" can be registered for correct indentation.
2683 Where such a macro ends a line (no semicolon) the next statement is no longer
2684 parsed as a statement continuation.
2686 ** Comint and modes derived from it use the standard completion code.
2690 *** Compilation mode can be used without Font Lock mode.
2691 `compilation-parse-errors-function' is now obsolete.
2693 *** New variable `compilation-filter-start', which is bound while
2694 `compilation-filter-hook' runs. It records the start position of the
2695 text inserted by `compilation-filter'.
2697 *** `compilation-error-screen-columns' and `compilation-first-column'
2698 are obeyed in the editing buffer. So programming language modes can
2699 set them, whereas previously only the value in the *Compilation*
2704 *** Customize buffers now contain a search field.
2705 The search is performed using `customize-apropos'.
2706 To turn off the search field, set `custom-search-field' to nil.
2708 *** Options in customize group buffers start out hidden if not customized.
2709 Use the arrow to the left of the option name to toggle visibility.
2711 *** custom-buffer-sort-alphabetically now defaults to t.
2713 *** The color widget now has a "Choose" button, which allows you to
2714 choose a color via `list-colors-display'.
2718 *** It is now possible to access buses other than the default system
2721 *** The `dbus-register-method' and `dbus-register-property' functions
2722 optionally do not register names.
2724 *** The new function `dbus-register-service' registers a known service
2725 name on a D-Bus without also registering a property or a method.
2729 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2730 if called with a prefix argument, read a file name from the minibuffer
2731 instead of using the current buffer.
2733 *** The "dired local variables" feature of Dired-x is obsolete.
2734 The standard directory local variables feature replaces it.
2738 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2739 controlling attempts to autojoin a channel.
2741 *** New variable `erc-coding-system-precedence': If we use `undecided'
2742 as the server coding system, this variable will then be consulted.
2743 The default is to decode strings that can be decoded as utf-8 as
2744 utf-8, and do the normal `undecided' decoding for the rest.
2748 *** The default value of `eshell-directory-name' has changed
2749 to be an "eshell" directory in `user-emacs-directory'.
2750 The old "~/.eshell/" directory is still used if it exists, though.
2754 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2755 It now supports multithread non-stop debugging and simultaneous
2756 debugging of several threads.
2760 *** RET (`image-toggle-animation') toggles animation, if applicable.
2761 Animation plays once, unless the option `image-animate-loop' is non-nil.
2765 *** New command M-x info-display-manual displays a named Info manual.
2766 If that manual is already visited in some Info buffer, it displays
2767 that buffer. (This is handy if you have many manuals in many *info*
2768 buffers, and don't remember the name of the buffer visiting the manual
2769 you want to consult.) Otherwise, it loads and displays the manual.
2771 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2772 This is for compatibility with the stand-alone Info reader program,
2773 and also because `Info-edit' is a rarely used command that is disabled
2776 ** Mail mode changes (not Message mode)
2778 *** New command M-x mail-add-attachment for adding MIME attachments
2780 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2781 (Its name is misleading, since it has nothing to do with MIME
2782 attachments.) The old name is now an obsolete alias to the new name.
2784 ** MH-E has been updated to MH-E version 8.3.1.
2785 See MH-E-NEWS for details.
2787 ** Modula-2 mode provides auto-indentation.
2789 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2791 ** nXML mode no longer binds C-RET to `nxml-complete'.
2792 Completion is now performed via `completion-at-point', bound to C-M-i
2793 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2794 default), this performs tag completion.
2796 ** Org mode has been updated to version 7.8.09.
2797 See ORG-NEWS for details.
2799 ** Prolog mode has been completely revamped, with lots of additional
2800 functionality such as more intelligent indentation, electricity,
2801 support for more variants, including Mercury, and a lot more.
2805 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2806 in the Rmail incoming message.
2808 *** The variable `rmail-message-filter' no longer has any effect.
2809 This change was made in Emacs 23.1 but was not advertised at the time.
2810 Try using `rmail-show-message-hook' instead.
2814 *** M-x shell prompts for the shell path name if the default directory
2815 is a remote file name and neither the environment variable $ESHELL nor
2816 the variable `explicit-shell-file-name' is set.
2818 *** TAB is now bound to the standard `completion-at-point' command,
2819 which now implements the pcomplete rules for shell command completion.
2823 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2824 if the mail server supports them. This uses either built-in GnuTLS
2825 support, or the starttls.el library. Customize `smtpmail-stream-type'
2828 *** The variable `smtpmail-auth-credentials' has been removed.
2829 By default, the information is now stored in the file ~/.authinfo.
2830 This was the default value of smtpmail-auth-credentials. If you had
2831 customized smtpmail-auth-credentials to a list of user names and
2832 passwords, those settings are not used. During your first connection
2833 to the smtp server, Emacs will prompt for the user name and password,
2834 and offer to save them to ~/.authinfo. Or you can manually copy the
2835 credentials to ~/.authinfo. For example, if you had
2837 (setq smtpmail-auth-credentials
2838 '(("mail.example.org" 25 "jim" "s!cret")))
2840 then the equivalent line in ~/.authinfo would be
2842 machine mail.example.org port 25 login jim password s!cret
2844 See the auth-source manual for more information, e.g. on encrypting
2845 the credentials file.
2847 *** The variable `smtpmail-starttls-credentials' has been removed.
2848 If you had that set, you need to put
2850 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2852 in your ~/.authinfo file instead.
2854 *** SMTPmail defaults to using the address in the From: header as the
2855 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2856 to the address you wish to use instead.
2860 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2861 and `sql-oracle-scan-on'.
2863 *** New options controlling prompting for login parameters.
2864 Each supported product has a custom variable `sql-*-login-params',
2865 which is a list of the parameters to be prompted for before a
2866 connection is established.
2868 *** The command `sql-product-interactive' now takes a prefix argument,
2869 which causes it to prompt for an SQL product.
2871 *** Product-specific SQL interactive commands now take prefix arguments.
2872 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2873 given a prefix argument, prompt for a name for the SQL interactive
2874 buffer. This reduces the need for calling `sql-rename-buffer'.
2876 *** SQL interactive modes suppress command continuation prompts, and
2877 replace tabs with spaces. The first change impacts multiple line SQL
2878 statements entered with C-j between each line, statements yanked into
2879 the buffer and statements sent with `sql-send-*' functions. The
2880 second prevents the MySQL and Postgres interpreters from listing
2881 object name completions when sent text via `sql-send-*' functions.
2883 *** New command `sql-connect' starts a predefined SQLi session,
2884 using the login parameters from `sql-connection-alist'.
2886 *** New "Save Connection" menu item in SQLi buffers.
2887 This gathers the login params specified for the SQLi session, if it
2888 was not started by a connection, and saves them as a new connection.
2890 *** New commands for listing database objects and details:
2891 sql-list-all and sql-list-table.
2893 *** An API for manipulating SQL product definitions has been added.
2897 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2901 *** New inline access method "ksu" (kerberized su).
2903 *** The following access methods are discontinued: "ssh1_old",
2904 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2906 *** The user option `remote-file-name-inhibit-cache' controls whether
2907 remote file attributes are cached for better performance.
2909 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2910 default value to "".
2912 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2913 for remote machines which support SELinux.
2915 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2916 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2917 the degree of parallelism.
2919 ** VC and related modes
2921 *** Support for pulling on distributed version control systems.
2922 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2923 supported (currently with Bzr, Git, and Mercurial), to update the
2924 current branch and working tree. A prefix argument means to prompt
2925 the user for specifics, e.g. a pull location.
2927 *** `vc-update' is now an alias for `vc-pull'.
2929 *** Support for merging on distributed version control systems.
2930 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2931 is supported (currently with Bzr, Git, and Mercurial), to merge
2932 changes from another branch into the current one. It prompts for
2933 specifics, e.g. a merge source.
2935 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2936 shows a diff while querying the user. It defaults to t.
2938 *** Log entries in some Log View buffers can be toggled to display a
2939 longer description by typing RET (log-view-toggle-entry-display).
2940 This is currently supported for Bzr, Git, and Mercurial (to support
2941 another backend, define a `log-view-expanded-log-entry-function').
2942 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2943 use this to display the full log entry for the revision at point.
2945 *** New command `vc-ediff' allows visual comparison of two revisions
2946 of a file similar to `vc-diff', but using ediff backend.
2948 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2949 this was not advertised at the time.
2951 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2952 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2953 this was not advertised at the time.
2959 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2961 *** partial-completion-mode (complete.el) is obsolete.
2962 You can get a comparable behavior with:
2963 (setq completion-styles '(partial-completion initials))
2964 (setq completion-pcm-complete-word-inserts-delimiters t)
2966 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2968 *** pgg is obsolete (use EasyPG instead).
2970 *** sregex.el is obsolete, since rx.el is a strict superset.
2972 *** s-region.el and pc-select.el are obsolete.
2973 They are superseded by shift-select-mode, enabled by default since 23.1.
2975 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2979 *** The Landmark game is now invoked with `landmark', not `lm'.
2980 Its functions and variables have been similarly renamed.
2982 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2983 (This interfered with cua-mode.)
2985 *** f90.el has some support for Fortran 2008 syntax.
2987 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2989 *** New command `nato-region' converts text to NATO phonetic alphabet.
2992 * New Modes and Packages in Emacs 24.1
2994 ** Occur Edit mode applies edits made in *Occur* buffers to the
2995 original buffers. It is bound to "e" in Occur mode.
2997 ** New global minor mode electric-pair-mode.
2998 When enabled, typing an open parenthesis automatically inserts the
2999 matching closing one.
3001 ** New global minor mode electric-indent-mode.
3002 When enabled, typing certain characters triggers reindentation.
3003 Major modes wishing to use this can set electric-indent-chars or
3004 electric-indent-functions.
3006 ** New global minor mode electric-layout-mode.
3007 When enabled, typing certain characters automatically inserts newlines.
3008 Major modes wishing to use this can set electric-layout-rules.
3010 ** tabulated-list.el provides a generic major mode for tabulated data,
3011 from which other modes can be derived.
3013 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3015 ** secrets.el is an implementation of the Secret Service API, an
3016 interface to password managers like GNOME Keyring or KDE Wallet. The
3017 Secret Service API requires D-Bus for communication. The command
3018 `secrets-show-secrets' offers a buffer with a visualization of the
3021 ** notifications.el provides an implementation of the Desktop
3022 Notifications API. It requires D-Bus for communication.
3024 ** soap-client.el supports access to SOAP web services from Emacs.
3025 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3027 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3029 ** New emacs-lock.el package.
3030 The previous version has been moved to obsolete/old-emacs-lock.el.
3031 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3032 against exiting Emacs and killing the buffer can be set separately.
3033 The mechanism for automatically turning off protection for buffers
3034 with dead inferior processes has been generalized.
3037 * Incompatible Lisp Changes in Emacs 24.1
3039 ** Passing a nil argument to a minor mode function call now ENABLES
3040 the minor mode unconditionally. This is so that you can write e.g.
3042 (add-hook 'text-mode-hook 'foo-mode)
3044 to enable foo-mode in Text mode buffers, removing the need for
3045 `turn-on-foo-mode' style functions. This affects all mode commands
3046 defined by `define-minor-mode'. If called interactively, the mode
3047 command still toggles the minor mode.
3049 ** The return value of `backup-buffer' has changed.
3050 It is now a list of three elements, where the second element is a list
3051 describing the original file's SELinux context. If Emacs or the
3052 system lacks SELinux support, the context list is (nil nil nil nil).
3053 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3055 ** `char-direction-table' and the `char-direction' function were deleted.
3056 They were buggy and inferior to the new support of bidirectional
3057 editing introduced in Emacs 24. If you need the bidirectional
3058 properties of a character, use `get-char-code-property' with the last
3059 argument `bidi-class'.
3061 ** `copy-directory' now copies the source directory as a subdirectory
3062 of the target directory, if the latter is an existing directory. The
3063 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3064 the contents directly into a pre-existing target directory.
3066 ** For mouse click input events in the text area, the Y pixel
3067 coordinate in the POSITION list now counts from the top of the text
3068 area, excluding any header line. Previously, it counted from the top
3071 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3072 been further reduced. Now a backquote not followed by a space is
3073 always treated as a "new-style" backquote. Please remove all
3074 "old-style" backquotes from your code. If your code uses backquotes
3075 as documented in the Elisp manual, and compiles without warning, then
3076 you have nothing to do in this regard. Code not following the
3077 appropriate conventions may fail to compile.
3079 The most common cause of trouble seems to be an old-style backquote
3080 followed by a newline. Another cause of trouble is vector notation
3081 for key sequence notation: instead of [(control ,)] and [(control ')],
3082 you should write [(control ?,)] and [(control ?')], which will work in
3085 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3086 was not advertised at the time. The function `custom-initialize-delay'
3087 replaced all known uses.
3089 ** `view-buffer' now treats special mode-class in the same way that
3090 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3091 major mode is special).
3093 ** Menu and tool bar changes
3095 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3096 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3097 With these alist entries omitted, `make-frame' checks the value of the
3098 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3099 a menu-bar or tool-bar, respectively. If the alist entries are added,
3100 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3102 *** The menu bar bindings's caches are not used any more.
3103 Use (where-is-internal <def> nil t) instead.
3105 ** Regions created by mouse dragging are now normal active regions,
3106 similar to those created by shift-selection (see Selection changes
3107 above). In previous Emacs versions, these regions were delineated by
3108 `mouse-drag-overlay'; that variable has been removed.
3110 ** The fourth argument of `filter-buffer-substring' has been removed.
3111 If you want to remove text properties from the final result, simply
3112 pass the result through substring-no-properties.
3114 ** cl.el no longer provides `cl-19'.
3116 ** The following obsolete functions and aliases have been removed
3117 (the appropriate new function is given in parentheses; "not needed"
3118 means you can just remove all calls to the function in question):
3120 *** `comint-kill-output' (`comint-delete-output')
3121 *** `decompose-composite-char' (`char-to-string')
3122 *** `outline-visible' (`outline-invisible-p')
3123 *** `internal-find-face' (`facep')
3124 *** `internal-get-face' (`facep and check-face')
3125 *** `frame-update-faces' (not needed)
3126 *** `frame-update-face-colors' (`frame-set-background-mode')
3127 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3128 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3129 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3130 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3131 *** `x-make-font-unbold' (`make-face-unbold')
3132 *** `x-make-font-unitalic' (`make-face-unitalic')
3133 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3134 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3135 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3136 *** `char-bytes' (== 1)
3137 *** `isearch-return-char' (`isearch-printing-char')
3138 *** `make-local-hook' (not needed)
3139 *** `set-screen-height' (`set-frame-height')
3140 *** `set-screen-width' (`set-frame-width')
3142 ** The following obsolete variables and varaliases have been removed
3143 (the appropriate new variable is given in parentheses):
3145 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3146 *** `vc-header-alist' (`vc-BACKEND-header')
3147 *** `directory-sep-char' (== ?/)
3148 *** `font-lock-defaults-alist' (`font-lock-defaults')
3149 *** `e' (`float-e').
3151 ** The following obsolete files were removed:
3152 sc.el, x-menu.el, rnews.el, rnewspost.el
3154 ** The format of the finder-inf.el file has changed, since the Finder
3155 mechanism is now based on the package system. The variable
3156 `finder-package-info' is replaced by `package--builtins' and
3157 `finder-keywords-hash'.
3159 ** When generating autoloads, `update-directory-autoloads' no longer
3160 assumes every inspected file is in your `load-path'. It instead
3161 generates relative names according to the current `load-path'.
3164 * Lisp Changes in Emacs 24.1
3166 ** Code can now use lexical scoping by default instead of dynamic scoping.
3167 The `lexical-binding' variable enables lexical scoping for local
3168 variables. It is typically set via a file-local variable in the first
3169 line of the file, in which case it applies to all the code in that
3172 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3173 binding instead of the old dynamic binding mode.
3175 *** Lexically scoped interpreted functions are represented with a new form
3176 of function value which looks like (closure ENV ARGS &rest BODY).
3178 *** New macro `letrec' to define recursive local functions.
3180 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3181 So do `defcustom' and other forms that call `defvar' as a subroutine.
3183 *** New function `special-variable-p' to check whether a variable is
3184 declared as dynamically bound.
3186 *** The form ((lambda ...) ...) is deprecated.
3188 ** An Emacs Lisp testing tool is now included.
3189 Emacs Lisp developers can use this tool to write automated tests for
3190 their code. See the ERT info manual for details.
3192 ** Changes for bidirectional display and editing
3194 *** New function `current-bidi-paragraph-direction'.
3195 This returns the base direction of the paragraph at point.
3197 *** New function `bidi-string-mark-left-to-right'.
3198 Given a string containing characters from right-to-left scripts, this
3199 function returns another string which can be safely inserted into a
3200 buffer, such that any following text will be always displayed to the
3201 right of that string. (This works by appending an invisible Unicode
3202 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3204 This is useful when the buffer has overall left-to-right paragraph
3205 direction and you need to insert a string whose contents are not known
3206 in advance, without disrupting the layout of the line.
3210 *** Window tree functions are accessible in Elisp.
3211 Functions are provided to return the parent, siblings or child windows
3212 of any window including internal windows (windows not associated with a
3213 buffer) in the window tree.
3215 **** New function `window-valid-p' gives non-nil for live and internal
3218 **** Window manipulation can deal with internal windows.
3219 Many window handling functions like `split-window', `delete-window', or
3220 `delete-other-windows' as well as the window resizing functions can now
3221 act on any window including internal ones.
3223 *** window-total-height/-width vs window-body-height/-width.
3224 The function `window-height' has been renamed to `window-total-height'
3225 and `window-width' has been renamed to `window-body-width'. The old
3226 names are provided as aliases. Two new functions `window-total-width'
3227 and `window-body-height' are provided.
3229 *** Window parameters specific to window handling functions.
3230 For each window you can specify a parameter to override the default
3231 behavior of a number of functions like `split-window', `delete-window'
3232 and `delete-other-windows'. The variable `ignore-window-parameters'
3233 allows to ignore processing such parameters.
3235 *** New semantics of third argument of `split-window'.
3236 The third argument of `split-window' has been renamed to SIDE and can be
3237 set to any of the values 'below, 'right, 'above, or 'left to make the
3238 new window appear on the corresponding side of the window that shall be
3239 split. Any other value of SIDE will cause `split-window' to split the
3240 window into two side-by-side windows as before.
3242 *** Window resizing functions.
3243 A new standard function for resizing windows called `window-resize' has
3244 been introduced. This and all other functions for resizing windows no
3245 longer delete any windows when they become too small.
3247 *** Deleting the selected window now selects the most recently selected
3248 live window on that frame instead.
3250 *** `adjust-window-trailing-edge' adjustments.
3251 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3252 is able to resize other windows if a window adjacent to the trailing
3253 edge cannot be shrunk any more. This makes its behavior more similar to
3254 that of Emacs 21 without compromising, however, its inability to delete
3255 windows which was introduced in Emacs 22.
3257 *** Window-local buffer lists.
3258 Windows now have local buffer lists. This means that removing a buffer
3259 from display in a window will preferably show the buffer previously
3260 shown in that window with its previous window-start and window-point
3261 positions. This also means that the same buffer may be automatically
3262 shown twice even if it already appears in another window.
3264 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3265 which if non-nil requires the buffer to be displayed in the currently
3266 selected window, signaling an error otherwise. If nil, another window
3267 can be used, e.g. if the selected one is strongly dedicated.
3269 *** `split-window-vertically' and `split-window-horizontally' renamed
3270 to `split-window-below' and `split-window-right' respectively.
3271 The old names are kept as aliases.
3275 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3276 named ACTION, and takes a display action of the same form as
3277 `display-buffer-base-action' (see Changes, above). A non-nil,
3278 non-list value is treated specially, as the old meaning.
3280 **** New variable `display-buffer-overriding-action'.
3282 **** The procedure of `display-buffer' etc. to choose a window is
3283 determined by combining `display-buffer-overriding-action',
3284 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3285 and `display-buffer-fallback-action'. The second and fourth of these
3286 are user-customizable variables.
3288 See the docstring of `display-buffer' for details.
3290 *** New functions `window-state-get' and `window-state-put'.
3291 These functions allow to save and restore the state of an arbitrary
3292 frame or window as an Elisp object.
3296 *** New variable `completion-extra-properties' used to specify extra
3297 properties of the current completion:
3298 - :annotate-function, same as the old completion-annotate-function.
3299 - :exit-function, function to call after completion took place.
3301 *** Functions on `completion-at-point-functions' can return any of the
3302 properties valid for `completion-extra-properties'.
3304 *** `completion-annotate-function' is obsolete.
3306 *** New `metadata' method for completion tables. The metadata thus returned
3307 can specify various details of the data returned by `all-completions':
3308 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3309 used to select a style in completion-category-overrides.
3310 - `annotation-function' to add annotations in *Completions*.
3311 - `display-sort-function' to specify how to sort entries in *Completions*.
3312 - `cycle-sort-function' to specify how to sort entries when cycling.
3314 *** `minibuffer-local-filename-must-match-map' is not used any more.
3315 Instead, the bindings in `minibuffer-local-filename-completion-map'
3316 are combined with `minibuffer-local-must-match-map'.
3318 *** New variable `completing-read-function' allows overriding the
3319 behavior of `completing-read'.
3321 ** `glyphless-char-display' can now distinguish between graphical and
3322 text terminal display, via a char-table entry that is a cons cell.
3324 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3325 Instead, the offending function is removed.
3329 *** New function `run-hook-wrapped' for running an abnormal hook by
3330 passing the hook functions as arguments to a "wrapping" function.
3331 Like `run-hook-with-args-until-success', it stops at the first
3332 non-nil return value.
3334 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3335 set of "wrapping" filters, similar to around advice.
3336 (A version of this macro was actually added in Emacs 23.2 but was not
3337 advertised at the time.)
3341 *** New macro `condition-case-unless-debug' (this was actually added in
3342 Emacs 23.1 as condition-case-no-debug, but not advertised)
3344 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3346 *** Variable `stack-trace-on-error' removed.
3348 *** The debugger can now "continue" from an error, which means it will
3349 jump to the error handler as if the debugger had not been invoked
3350 instead of jumping all the way to the top-level.
3352 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3353 This can be useful when `inhibit-quit' is set.
3355 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3356 named Emacs server instances.
3358 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3359 to redirect STDOUT to a file.
3361 ** The function `format-time-string' now supports the %N directive,
3362 for higher-resolution time stamps.
3364 ** New input reading functions
3366 *** New function `read-char-choice' reads a restricted set of
3367 characters, discarding any inputs not inside the set.
3369 *** The command `read-color' now requires a match for a color name
3370 or RGB triplet, instead of signaling an error if the user provides
3373 **** `facemenu-read-color' is now an alias for `read-color'.
3375 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3376 The variable is now used to load all kind of supported dynamic libraries,
3377 not just image libraries. The previous name is still available as an
3380 ** Syntax parsing changes
3382 *** New variable `syntax-propertize-function'.
3383 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3384 This allows syntax-table properties to be set independently from font-lock:
3385 just call syntax-propertize to make sure the text is propertized.
3386 Together with this new variable come a new hook
3387 syntax-propertize-extend-region-functions, as well as two helper functions:
3388 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3389 as-is; and syntax-propertize-rules which provides a new way to specify
3392 *** Syntax tables support a new "comment style c" additionally to style b.
3394 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3396 ** frame-local variables cannot be let-bound any more.
3398 ** Major and minor mode changes
3400 *** `set-auto-mode' now respects mode: local variables at the end of files,
3401 as well as those in the -*- line.
3403 *** `prog-mode' is a new major mode from which programming modes
3406 **** `prog-mode-hook' can be used to enable features for programming
3407 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3408 on-the-fly spell checking for comments and strings.
3410 **** New minor modes `prettify-symbols-mode' and
3411 `global-prettify-symbols-mode' let the user enable symbol
3412 prettification (replacing a string like "lambda" with the Greek lambda
3415 *** New hook `change-major-mode-after-body-hook', run by
3416 `run-mode-hooks' just before any other mode hooks.
3418 *** Enabled globalized minor modes can be disabled in specific major modes.
3419 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3420 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3422 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3424 ** File-handling changes
3426 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3427 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3428 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3429 argument is supplied (see Trash changes, above).
3431 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3433 ** Tool-bars can display separators.
3434 Tool-bar separators are handled like menu separators in menu-bar maps,
3435 i.e. via menu entries of the form `(menu-item "--")'.
3439 *** Animated images support (currently animated gifs only).
3441 **** `image-animated-p' returns non-nil if an image can be animated.
3443 **** `image-animate' animates a supplied image spec.
3445 **** `image-animate-timer' returns the timer object for an image that
3448 *** `image-extension-data' has been renamed to `image-metadata'.
3449 The old name is an obsolete alias to the new one.
3451 *** Image mode can view any image type that ImageMagick supports.
3452 This requires Emacs to be built with ImageMagick support.
3454 **** New function `imagemagick-types', defined if ImageMagick support
3455 is enabled, returns a list of image file extensions that your
3456 ImageMagick installation supports.
3458 **** New function `imagemagick-register-types' enables ImageMagick
3459 image types in Image mode and in `create-image' and other helper
3462 **** New option `imagemagick-types-inhibit' excludes certain
3463 ImageMagick image types from `imagemagick-register-types'.
3465 **** With ImageMagick support, there are extra Image mode commands to
3466 resize and rotate images: `image-transform-fit-to-height',
3467 `image-transform-fit-to-width', `image-transform-set-rotation', and
3468 `image-transform-set-scale'.
3470 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3471 passes it to the mail user agent function. This argument specifies an
3472 action for returning to the caller after finishing with the mail. For
3473 example, this is used by Rmail to optionally delete a mail window.
3475 ** XML and HTML parsing
3476 If Emacs is compiled with libxml2 support, there are two new
3477 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3478 and `libxml-parse-xml-region' (which parses XML). Both return an
3479 Emacs Lisp parse tree.
3481 ** Networking and encryption changes
3483 *** `open-network-stream' can now be used to open an encrypted stream.
3484 It now accepts an optional `:type' parameter for initiating a TLS
3485 connection, directly or via STARTTLS. To do STARTTLS, additional
3486 parameters (`:end-of-command', `:success', `:capabilities-command')
3487 must also be supplied.
3489 *** New library gnutls.el.
3490 The new function `gnutls-available-p' returns non-nil if Emacs is
3491 built with GnuTLS support. The main entry points are
3492 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3493 these functions through `open-network-stream', because that can
3494 upgrade connections through STARTTLS opportunistically or use plain
3495 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3498 *** New primitive `secure-hash' that supports many secure hash algorithms:
3499 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3500 sha1.el has been removed. The `sha1' feature is provided by default.
3504 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3506 ** Progress reporters can now "spin".
3507 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3508 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3509 time you call `progress-reporter-update' on that progress reporter,
3510 with a nil or omitted VALUE argument, the reporter message is
3511 displayed with a "spinning bar".
3513 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3514 being reverted, even if the buffer has a local `revert-buffer-function'.
3516 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3517 If delayed-warnings-list is non-nil, the command loop calls
3518 `delayed-warnings-hook' after `post-command-hook'. At present, this
3519 is only used by Emacs on some platforms to display warnings during
3520 startup, which might otherwise not be noticed. This uses the
3521 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3523 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3525 ** New function `make-composed-keymap' that constructs a new keymap
3526 from multiple input maps. You can use this to make a keymap that
3527 inherits from multiple maps, eg:
3528 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3530 ** New function `string-prefix-p'.
3531 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3533 ** New reader macro ## that stands for the empty symbol.
3534 This means that the empty symbol can now be read back. Also, #: by itself
3535 (when not immediately followed by a possible symbol character) stands for
3536 an empty uninterned symbol.
3538 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3540 ** The following functions and variables are obsolete:
3542 *** `tooltip-use-echo-area' is obsolete.
3543 Rather than setting this to t, disable Tooltip mode instead.
3545 *** buffer-substring-filters is obsolete.
3546 Use `filter-buffer-substring-functions' instead.
3548 *** `byte-compile-disable-print-circle' is obsolete.
3550 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3551 Use `post-command-hook' instead.
3553 *** `font-lock-maximum-size' is obsolete.
3556 * Changes in Emacs 24.1 on Non-Free Operating Systems
3558 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3559 and also when HOME is set to C:\ by default.
3561 ** New configure.bat options
3563 *** --enable-checking builds Emacs with extra runtime checks.
3565 *** --distfiles specifies files to be included in binary distribution.
3567 *** --without-gnutls disables automatic GnuTLS detection.
3569 *** --lib for general library linkage, works with the USER_LIBS build variable.
3571 ** New make target `dist' to create binary distribution for MS Windows.
3573 ** The Lisp function `w32-default-color-map' is now obsolete.
3574 (It is only used internally in the Emacs C code.)
3576 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3577 reappear on mouse-over. (Requires OS X 10.6 or later.)
3579 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3580 other platforms, rather than inserting its contents into the buffer.
3583 ----------------------------------------------------------------------
3584 This file is part of GNU Emacs.
3586 GNU Emacs is free software: you can redistribute it and/or modify
3587 it under the terms of the GNU General Public License as published by
3588 the Free Software Foundation, either version 3 of the License, or
3589 (at your option) any later version.
3591 GNU Emacs is distributed in the hope that it will be useful,
3592 but WITHOUT ANY WARRANTY; without even the implied warranty of
3593 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3594 GNU General Public License for more details.
3596 You should have received a copy of the GNU General Public License
3597 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3602 paragraph-separate: "[
\f]*$"