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 * Changes in Emacs 24.4
84 ** Emacs now supports menus on text-mode terminals.
85 If the terminal supports a mouse, clicking on the menu bar, or on
86 sensitive portions of the mode line or header line, will drop down the
87 menu defined at that position. Likewise, clicking C-mouse-2 or
88 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
91 If the text terminal does not support a mouse, you can activate the
92 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
94 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
95 customize the option `tty-menu-open-use-tmm' to a non-nil value.
96 (Typing M-` will always invoke `tmm-menubar', even if
97 `tty-menu-open-use-tmm' is nil.)
99 ** Key ? also describes prefix bindings like C-h.
102 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
103 because it affects caching of paragraph scanning results as well.
106 ** `apropos-variable' is now `apropos-user-option'
107 `apropos-user-option' shows all user options while `apropos-variable'
108 shows all variables. When called with a universal prefix argument,
109 the two commands swap their behaviors. When `apropos-do-all' is
110 non-nil, they output the same results.
113 ** `eval-defun' on an already defined defcustom calls the :set function,
116 ** If the new variable `enable-dir-local-variables' is nil,
117 directory local variables are ignored. May be useful for some modes
118 that want to ignore directory-locals while still respecting file-locals.
120 ** The option `set-mark-default-inactive' has been deleted.
121 This unfinished feature was introduced by accident in Emacs 23.1;
122 simply disabling Transient Mark mode does the same thing.
124 ** `initial-buffer-choice' can now specify a function to set up the
127 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
128 and read-only. Code that might create the *Messages* buffer should
129 call the function `messages-buffer' to do so and set the mode.
131 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
132 You may think of it as a *scratch* buffer whose content is preserved.
133 In fact, it was designed as a replacement for *scratch* buffer and can
134 be used that way by setting `initial-buffer-choice' to `remember-notes'
135 and `remember-notes-buffer-name' to "*scratch*". Without the second
136 change, *scratch* buffer will still be there for notes that do not
137 need to be preserved.
139 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
141 ** ACL support has been added.
143 *** Emacs preserves the ACL entries of files when backing up.
145 *** New functions `file-acl' and `set-file-acl' get and set the ACL
146 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
147 libacl. On MS-Windows, the NT Security APIs are used to emulate the
148 POSIX ACL interfaces.
150 ** New option `scroll-bar-adjust-thumb-portion'.
151 Available only on X, this option allows to control over-scrolling
152 using the scroll bar (i.e. dragging the thumb down even when the end
153 of the buffer is visible).
155 ** New function `add-face-text-property' has been added, which can be
156 used to conveniently prepend/append new face attributes to text.
158 ** In compiled Lisp files, the header no longer includes a timestamp.
160 ** Multi-monitor support has been added.
162 *** New functions `display-monitor-attributes-list' and
163 `frame-monitor-attributes' can be used to obtain information about
164 each physical monitor on multi-monitor setups.
166 *** The functions `display-pixel-width' and `display-pixel-height' now
167 behave consistently among the platforms: they return the pixel width
168 or height for all physical monitors associated with the given display
169 as just they were on X11. To get information for each physical
170 monitor, use the new functions above. Similar notes also apply to
171 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
172 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
174 ** New macro `alternatives-define' can be used to define generic commands.
175 Generic commands are interactive functions whose implementation can be
176 selected among several alternatives, as a matter of user preference.
178 ** New hooks `focus-in-hook', `focus-out-hook'.
179 These are normal hooks run when an Emacs frame gains or loses input focus.
181 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
182 You can change the default by customizing the variable blink-cursor-blinks.
183 Also timers for blinking are stopped when no blinking is done, so Emacs does
184 not consume CPU cycles.
186 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
187 `frame-configuration-to-register'. It offers similar functionality, plus
188 some enhancements, like the ability to restore deleted frames. Command
189 `frame-configuration-to-register' is still available, but unbound.
191 ** The command `quail-help' is deleted. Use `C-h C-\'
192 (`describe-input-method') instead.
194 ** The default value of `comment-use-global-state' is changed to t,
195 and this variable has been marked obsolete.
197 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
198 a 1-letter word, which is an error according to Polish and
199 Czech typography rules. To globally enable this feature, evaluate:
201 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
204 * Editing Changes in Emacs 24.4
206 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
207 Most commands are still unaware of it, but kill/yank do work on the rectangle.
209 ** C-x TAB enters a transient interactive mode.
210 You can then use the left/right cursor keys to move the block of text.
212 ** `tab-stop-list' is now implicitly extended to infinity by repeating
213 the last step. Its default value is changed to nil which means a tab
214 stop every `tab-width' columns.
216 ** `split-window' is no longer a command, just a non-interactive function.
217 As a command it was a special case of `split-window-below', and as such
218 superfluous. After being reimplemented in Lisp, its interactive form
219 was mistakenly retained.
221 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
222 bound to <f11> and M-<f10>, respectively.
224 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
228 ** New option `visual-order-cursor-movement'.
229 If this is non-nil, cursor motion with arrow keys will follow the
230 visual order of characters on the screen: <left> always moves to the
231 left, <right> always moves to the right, disregarding the surrounding
232 bidirectional context.
234 ** All register commands can now show help with preview.
236 ** New command `kmacro-to-register' to store keyboard macros in registers.
240 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
241 You can pick the name of the function and the variables with `C-x 4 a'.
244 * Changes in Specialized Modes and Packages in Emacs 24.4
246 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
248 ** SMIE indentation can be customized via `smie-config'.
249 The customization can be guessed by Emacs by providing a sample indented
250 file and letting SMIE learn from it.
252 ** sh-script now uses its SMIE indentation algorithm by default.
254 ** The debugger's `e' command evaluates the code in the context at point.
255 This includes using the lexical environment at point, which means that
256 `e' now lets you access lexical variables as well.
258 ** `eshell' now supports visual subcommands and options
259 Eshell has been able to handle "visual" commands (interactive,
260 non-line oriented commands such as top that require display
261 capabilities not provided by eshell) by running them in an Emacs
262 terminal emulator. See `eshell-visual-commands'.
264 This feature has been extended to subcommands and options that make a
265 usually line-oriented command a visual command. Typical examples are
266 "git log" and "git <command> --help" which display their output in a
267 pager by default. See `eshell-visual-subcommands' and
268 `eshell-visual-options'.
270 ** If your Emacs is compiled with libxml2 support, you can use the new
271 built-in web browser `eww'.
273 ** `remember' can now store notes in separates files
274 You can use the new function `remember-store-in-files' within the
275 `remember-handler-functions' option.
277 See `remember-data-directory' and `remember-directory-file-name-format'
278 for new options related to this function.
280 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
282 ~/.emacs.d/timelog replaces ~/.timelog
283 ~/.emacs.d/vip replaces ~/.vip
284 ~/.emacs.d/viper replaces ~/.viper
285 ~/.emacs.d/ido.last replaces ~/.ido.last
286 ~/.emacs.d/kkcrc replaces ~/.kkcrc
287 ~/.emacs.d/quickurls replaces ~/.quickurls
288 ~/.emacs.d/idlwave replaces ~/.idlwave
289 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
290 ~/.emacs.d/places replaces ~/.emacs-places
291 ~/.emacs.d/shadows replaces ~/.shadows
292 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
293 ~/.emacs.d/strokes replaces ~/.strokes
294 ~/.emacs.d/notes replaces ~/.notes
295 ~/.emacs.d/type-break replaces ~/.type-break
296 Also the following files used by the now obsolete otodo-mode.el:
297 ~/.emacs.d/todo-do replaces ~/.todo-do
298 ~/.emacs.d/todo-done replaces ~/.todo-done
299 ~/.emacs.d/todo-top replaces ~/.todo-top
302 ** Delphi mode is now called OPascal mode.
303 *** All delphi-* variables and functions have been renamed to opascal-*.
304 *** `delphi-newline-always-indents' is not supported any more.
305 Use `electric-indent-mode' instead.
306 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
308 ** Eldoc Mode works properly in the minibuffer.
310 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
312 ** completing-read-multiple's separator can now be a regexp.
313 The default separator is changed to allow surrounding spaces around the comma.
317 *** Battery information via the BSD `apm' utility is now supported.
321 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
323 ** Calendar and Diary
325 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
326 `calendar-month-header'.
328 *** New option `calendar-day-header-array'.
330 *** The variable `calendar-font-lock-keywords' is obsolete.
333 *** New variable `diary-from-outlook-function', used by the command
334 `diary-from-outlook'.
336 ** VC and related modes
338 *** In VC directory mode, `D' displays diffs between VC-controlled
339 whole tree revisions.
341 *** In VC directory mode, `L' lists the change log for the current VC
342 controlled tree in a window.
344 *** In VC directory mode, `I' shows a log of changes that will be
345 received with a pull operation.
347 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
348 under current version control system. When called with a prefix
349 argument, you can remove a file from the ignored file list.
351 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
352 because it is moved to vc-cvs.el.
356 *** New macro cl-tagbody.
359 *** letf is now just an alias for cl-letf.
363 *** Calc by default now uses the Gregorian calendar for all dates, and
364 uses January 1, 1 AD as its day number 1. Previously Calc used the
365 Julian calendar for dates before September 14, 1752, and it used
366 December 31, 1 BC as its day number 1; the new scheme is more
367 consistent with Calendar's calendrical system and day numbering.
369 *** The new variable `calc-gregorian-switch' lets you configure the
370 date when Calc switches from the Julian to the Gregorian calendar.
371 Nil, the default value, means to always use the Gregorian calendar.
372 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
375 *** Support for ISO 8601 dates.
379 *** `desktop-auto-save-timeout' defines the number of seconds between
380 auto-saves of the desktop.
382 *** `desktop-restore-frames', enabled by default, allows saving and
383 restoring the frame/window configuration (frameset). Additional options
384 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
385 and `desktop-restore-forces-onscreen' offer further customization.
389 *** New minor mode `dired-hide-details-mode' hides details.
393 *** New option `erc-accidental-paste-threshold-seconds'.
394 If set to a number, this can be used to avoid accidentally paste large
395 amounts of data into the ERC input.
399 *** New option `epa-mail-aliases'.
401 You can set this to a list of alias expansions for keys to use
402 in `epa-mail-encrypt'.
404 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
405 that means: when one of the recipients of the message being encrypted
406 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
408 If one element of the variable's value is ("foo@bar.com"),
409 that means: when one of the recipients of the message being encrypted
410 is `foo@bar.com', ignore that name as regards encryption.
411 This is useful to avoid a query when you have no key for that name.
414 ** New F90 mode option `f90-smart-end-names'.
416 ** Icomplete is a bit more like Ido.
417 *** key bindings to navigate through and select the completions.
418 *** The icomplete-separator is customizable, and its default has changed.
419 *** Removed icomplete-show-key-bindings.
420 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
421 (setq icomplete-with-completion-tables '(internal-complete-buffer))
422 will revert to the old behavior.
425 ** New features for Octave mode:
426 *** Font locking for texinfo comments and new keywords
427 *** Completion in Octave file buffers
429 *** Jump to definition
430 *** Documentation lookup/search
431 *** Code cleanup and various bug fixes
434 *** Ido has a manual now.
435 *** `ido-use-virtual-buffers' takes a new value 'auto.
436 *** `ido-decorations' has been slightly extended to give a bit more control.
440 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
441 visit the next image file and the previous image file in the same
442 directory, respectively.
444 *** New commands to show specific frames of multi-frame images.
445 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
446 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
448 *** New commands to speed up, slow down, or reverse animation.
451 *** The command `image-mode-fit-frame' deletes other windows.
452 When toggling, it restores the frame's previous window configuration.
453 It also has an optional frame argument, which can be used by Lisp
454 callers to fit the image to a frame other than the selected frame.
458 *** New face `info-index-match' is used to highlight matches in index
459 entries displayed by `Info-index-next', `Info-virtual-index' and
464 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
465 will cycle through faces in `hi-lock-face-defaults' without prompting.
468 *** New global command `M-s h .' (`highlight-symbol-at-point')
469 highlights the symbol found near point without prompting,
470 using the next face automatically.
472 ** Search and Replace
474 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
475 starts a symbol (identifier) incremental search forward with the
476 symbol found near point added to the search string initially.
478 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
479 and adds it to the search string.
481 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
482 between nil and the value of the option `search-invisible' (or `open'
485 *** `query-replace' skips invisible text when `search-invisible' is nil,
486 and opens overlays with hidden text when `search-invisible' is `open'.
489 *** By default, prefix arguments do not now terminate Isearch mode.
490 Set `isearch-allow-prefix' to nil to restore old behavior.
492 *** More Isearch commands accept prefix arguments, namely
493 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
496 *** Word search now matches whitespace at the beginning/end
497 of the search string if it contains leading/trailing whitespace.
498 In an incremental word search or when using a non-nil LAX argument
499 of `word-search-regexp', the lax matching can also match part of
500 the first word (in addition to the lax matching of the last word).
501 The same rules are now applied to the symbol search with the difference
502 that it matches symbols, and non-symbol characters between symbols.
504 ** MH-E has been updated to MH-E version 8.5.
505 See MH-E-NEWS for details.
508 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
509 Customize `unrmail-mbox-format' to change this.
512 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
513 of how Rmail displays non-MIME messages.
516 ** New function `ses-rename-cell' to give SES cells arbitrary names.
518 ** trace-function was largely rewritten.
519 New features include:
520 - no prompting for the destination buffer, unless a prefix-arg was used.
521 - additionally to prompting for a destination buffer, when a prefix-arg is
522 used, the user can enter a "context", i.e. Lisp expression whose value at the
523 time the function is entered/exited will be printed along with the function
524 name and arguments. Useful to trace the value of (current-buffer) or
525 (point) when the function is invoked.
527 ** New command `delete-duplicate-lines' has new types of operation:
528 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
529 it works like the utility `uniq'. Otherwise by default it deletes
530 duplicate lines everywhere in the region without regard to adjacency.
531 When its arg KEEP-BLANKS is non-nil (when called interactively with
532 C-u C-u C-u), duplicate blank lines are preserved.
534 ** New `cycle-spacing' command allows cycling between having just one
535 space, no spaces, or reverting to the original spacing. Like
536 `just-one-space' command it can handle or ignore newlines and
537 leave different number of spaces.
539 ** Todo mode has been rewritten and enhanced.
540 New features include:
541 - support for multiple todo files and archive files of done items;
542 - renaming, reordering, moving, merging, and deleting categories;
543 - sortable tabular summaries of categories and the types of items they contain;
544 - cross-category lists of items filtered by specific criteria;
545 - more fine-grained interaction with the Emacs diary, by being able to decide
546 for each todo item whether it appears in the Fancy Diary display;
547 - highly flexible new item insertion and item editing;
548 - moving items between categories, storing done items in their category or in
549 archive files, undoing or unarchiving done items;
550 - reprioritizing items by inputting a numerical priority;
551 - extensive customizability of operation and display, including numerous faces.
552 The Todo mode user manual describes all commands and most user options.
553 To support some of these features, a new file format is used, which is
554 incompatible with the old format; however, you can convert old todo and done
555 item files to the new format on initializing the first new todo file, or at any
556 later time with the provided conversion command. The old version of
557 todo-mode.el has been made obsolete and renamed otodo-mode.el.
561 *** The experimental url syntax for remote file names is withdrawn.
564 *** New connection method "adb", which allows to access Android
565 devices by the Android Debug Bridge. The variable `tramp-adb-program'
566 can be used to adapt the path of the "adb" program, if needed.
568 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
569 "scpc" and "rsyncc" are discontinued. The ssh option
570 "ControlMaster=auto" is set automatically in all ssh-based methods,
574 *** Handlers for `file-acl' and `set-file-acl' for remote machines
575 which support POSIX ACLs.
578 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
579 for remote machines which support filesystem notifications.
583 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
585 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
589 *** The commands `woman-default-faces' and `woman-monochrome-faces'
590 are obsolete. Customize the `woman-*' faces instead.
594 *** Added Eshell-Tramp module
595 External su and sudo commands are now the default; the internal,
596 Tramp-using variants can still be used by enabling the eshell-tramp
601 *** The format of `archive-contents' files, generated by package
602 repositories, has changed to allow a new (fifth) element in the data
603 vectors, containing an associative list with extra properties.
605 *** `describe-package' buffer uses the `:url' extra property to
606 display a `Homepage' header, if it's present.
608 ** New term.el option `term-suppress-hard-newline'.
610 ** Obsolete packages:
612 *** Iswitchb is made obsolete by icomplete-mode.
614 *** longlines.el is obsolete; use visual-line-mode instead.
619 *** terminal.el is obsolete; use term.el instead.
621 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
626 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
629 *** The Info-edit command is obsolete. Editing Info nodes by hand
630 has not been relevant for some time.
634 *** `explicit-bash-args' now always defaults to use --noediting.
635 During initialization, Emacs no longer expends a process to decide
636 whether it is safe to use Bash's --noediting option. These days
637 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
640 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
643 * New Modes and Packages in Emacs 24.4
645 ** New `superword-mode' in subword.el
646 `superword-mode' overrides the default word motion commands to treat
647 symbol_words as a single word, similar to what `subword-mode' does and
648 using the same internal functions.
650 ** New nadvice.el package offering lighter-weight advice facilities.
652 - add-function/remove-function which can be used to add/remove code on any
653 function-carrying place, such as process-filters or `<foo>-function' hooks.
654 - advice-add/advice-remove to add/remove a piece of advice on a named function,
655 much like `defadvice' does.
657 ** New frameset.el package.
658 It provides a set of operations to save a frameset (the state of all
659 or a subset of the existing frames and windows, somewhat similar to a
660 frame configuration), both in-session and persistently, and restore it
661 at some point in the future.
664 ** The package filenotify.el provides an interface for file system
665 notifications. It requires, that Emacs is compiled with one of the
666 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
669 * Incompatible Lisp Changes in Emacs 24.4
671 ** `kill-region' lost its `yank-handler' optional argument.
673 ** `(input-pending-p)' no longer runs other timers which are ready to
674 run. The new optional CHECK-TIMERS param allows for the prior behavior.
676 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
678 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
679 Some languages match those as »...« and others as «...» so better stay neutral.
681 ** The default file coding for Emacs Lisp files is now utf-8.
682 (See file-coding-system-alist.) In most cases, this change is transparent, but
683 files that contain unusual characters without specifying an explicit coding
684 system may fail to load with obscure errors.
685 You should either convert them to utf-8 or add an explicit `coding:' cookie.
687 ** overriding-terminal-local-map does not replace the local keymaps any more.
688 It used to disable the minor mode, major mode, and text-property keymaps,
689 whereas now it simply has higher precedence.
691 ** Default process filters and sentinels are not nil any more.
692 Instead they default to a function which does what the nil value used to do.
694 ** `read-event' does not return decoded chars in ttys any more.
695 Just as was the case in Emacs-22 and before, decoding of tty input according to
696 keyboard-coding-system is not performed in read-event any more. But contrary
697 to that past, it is still done before input-decode-map/function-key-map/...
699 ** Removed inhibit-local-menu-bar-menus.
701 ** frame-local variables that affect redisplay do not work any more.
702 More specifically, the redisplay does not bother to check for a frame-local
703 value when looking up variables.
705 ** nil and "unbound" are indistinguishable in symbol-function.
706 `symbol-function' never signals `void-function' any more.
707 `fboundp' returns non-nil if the symbol was `fset' to nil.
709 ** `defadvice' does not honor the `freeze' flag and cannot advise
710 special-forms any more.
712 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
713 VAR was bound to nil which was not tremendously useful and just lead to
714 spurious warnings about an unused var.
716 ** The return value of `backup-buffer' has changed.
717 The second argument is no longer an SELinux context, instead it is an
718 alist of extended attributes as returned by the new function
719 `file-extended-attributes'. The attributes can be applied to another
720 file using `set-file-extended-attributes'.
722 ** `visited-file-modtime' now returns -1 for nonexistent files.
723 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
724 in the presence of files with negative time stamps.
726 ** The cars of the elements in `interpreter-mode-alist' are now treated
727 as regexps rather than literal strings. Technically this is an
728 incompatible change, but unless you are using interpreter-mode-alist
729 for something (not just adding elements to it), it ought not to affect you.
732 * Lisp Changes in Emacs 24.4
734 ** New hook `pre-redisplay-function'.
737 ** Functions that pop up menus and dialogs now work on all terminal types,
739 This includes `x-popup-menu', `x-popup-dialog', `message-box',
742 The function `display-popup-menus-p' will now return non-nil for a
743 display or frame whenever a mouse is supported on that display or
746 ** New bool-vector set operation functions:
747 *** `bool-vector-exclusive-or'
748 *** `bool-vector-union'
749 *** `bool-vector-intersection'
750 *** `bool-vector-set-difference'
751 *** `bool-vector-not'
752 *** `bool-vector-subsetp'
753 *** `bool-vector-count-consecutive'
754 *** `bool-vector-count-population'
756 ** Comparison functions =, <, >, <=, >= now take many arguments.
758 ** The second argument of `eval' can now be a lexical-environment.
760 ** `with-demoted-errors' takes an additional argument `format'.
762 ** New function `define-error'.
764 ** New hook `tty-setup-hook'.
767 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
769 ** New library helpers.el for misc helper functions
770 *** `hash-table-keys'
771 *** `hash-table-values'
772 *** `string-trim-left'
773 *** `string-trim-right'
776 ** Obsoleted functions:
779 *** `lisp-complete-symbol'
781 *** `minibuffer-completion-contents'
782 *** `isearch-nonincremental-exit-minibuffer'
783 *** `isearch-filter-visible'
784 *** `generic-make-keywords-list'
786 ** `with-wrapper-hook' is obsoleted by `add-function'.
787 The few hooks that used with-wrapper-hook are replaced as follows:
788 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
789 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
790 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
792 ** `split-string' now takes an optional argument TRIM.
793 The value, if non-nil, is a regexp that specifies what to trim from
794 the start and end of each substring.
796 ** New function `string-suffix-p'.
798 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
800 ** Support for filesystem notifications.
801 Emacs now supports notifications of filesystem changes, such as
802 creation, modification, and deletion of files. This requires the
803 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
804 MS-Windows systems, this is supported for Windows XP and newer
807 ** Changes in autorevert.el
810 *** If Emacs is compiled with file notification support, notifications
811 are used instead of checking the time stamp of the files. You can
812 disable this by setting the user option `auto-revert-use-notify' to
813 nil. Alternatively, a regular expression of directories to be
814 excluded from file notifications can be specified by
815 `auto-revert-notify-exclude-dir-regexp'.
818 *** The new user option `auto-revert-remote-files' enables reversion
819 of remote files when set to non-nil.
823 *** The function `face-spec-set' is now analogous to `setq' for face specs.
824 Its third arg now accepts values specifying exactly which face spec to
825 set (defface, custom, or user spec), and it directly sets the relevant
826 property using the supplied face spec.
828 *** Face specs set via Custom themes now replace the `defface' spec
829 rather than inheriting from it (as do face specs set via Customize).
831 *** New face characteristic (supports :underline (:style wave))
832 specifies whether or not the terminal can display a wavy line.
834 *** New face spec attribute :distant-foreground
835 specifies foreground to use if background color is near the foreground
836 color that would otherwise have been used.
841 *** `image-animated-p' is now `image-multi-frame-p'.
842 It returns non-nil for any image that contains multiple frames,
843 whether or not it specifies a frame delay.
846 *** When animating images that do not specify a frame delay,
847 Emacs uses `image-default-frame-delay'.
850 *** New functions `image-current-frame' and `image-show-frame' for getting
851 and setting the current frame of a multi-frame image.
853 *** You can change the speed of animated images.
855 ** Changes in encoding and decoding of text
858 *** New coding-system `prefer-utf-8'.
859 This is like `undecided' but prefers UTF-8 on decoding if the text to
860 be decoded does not contain any invalid UTF-8 sequences. On encoding,
861 any non-ASCII characters are automatically encoded as UTF-8.
864 *** New attributes of coding-systems whose type is `undecided'.
865 Two new attributes, `:inhibit-null-byte-detection' and
866 `:inhibit-iso-escape-detection', determine how to detect encoding of
867 text that includes null bytes and ISO-2022 escape sequences,
868 respectively. Each of these attributes can be either nil, zero, or
869 t. If it is t, decoding text ignores null bytes and, respectively,
870 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
871 with no-conversion and ISO-2022 sequences cause Emacs to assume the
872 text is encoded in one of the ISO-2022 encodings, such as
873 iso-2022-7bit. If the value is zero, Emacs consults the variables
874 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
876 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
877 UTF-8 encoding and decoding, whenever possible.
879 These attributes are only meaningful for coding-systems of type
880 `undecided'. (The type of a coding-system is determined by its
881 `:coding-type' attribute and can be accessed by calling the
882 `coding-system-type' function.)
884 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
885 with the same interpretation as the returned value of `visited-file-modtime'.
887 ** time-to-seconds is not obsolete any more.
888 ** New functions special-form-p and macrop.
889 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
890 text-property on the first char.
892 ** The `defalias-fset-function' property lets you catch calls to defalias
893 and redirect them to your own function instead of `fset'.
895 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
896 When you edit DIR/FILE, Emacs normally creates a symbolic link
897 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
898 is being edited. Formerly, if there was already a non-symlink file
899 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
900 through DIR/.#FILE.9. These fallbacks have been removed, so that
901 Emacs now no longer locks DIR/FILE in that case.
903 On file systems that do not support symbolic links, the lock is now a
904 regular file with contents being what would have been in the symlink.
906 ** The 9th element returned by `file-attributes' is now unspecified.
907 Formerly, it was t if the file's gid would change if file were deleted
908 and recreated. This value has been inaccurate for years on many
909 platforms, and nobody seems to have noticed or cared.
911 ** The function `file-ownership-preserved-p' now has an optional
912 argument GROUP which causes it check for file group too. This can be
913 used in place of the 9th element of `file-attributes'.
915 ** New functions `group-gid' and `group-real-gid'.
917 ** The 6th argument to `copy-file' has been renamed to
918 `preserve-extended-attributes' as it now handles both SELinux context
921 ** The `common-substring' argument of display-completion-list is obsolete.
922 Either use `completion-all-completions' which already returns highlighted
923 strings (including for partial or substring completion) or call
924 `completion-hilit-commonality' to add the highlight.
926 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
928 *** The package descriptor and name of global variables, constants,
929 and functions should be separated by two hyphens if the symbol is not
930 meant to be used by other packages.
933 * Changes in Emacs 24.4 on Non-Free Operating Systems
935 ** The procedure for building Emacs on MS-Windows has changed.
936 It is now built by running the same configure script as on all other
937 platforms. This requires the MSYS environment and MinGW development
938 tools. See the updated instructions in nt/INSTALL for details.
940 Using the Posix configure script and Makefile's also means a change in
941 the directory structure of the Emacs installation on Windows. It is
942 now the same as on GNU and Unix systems. In particular, the auxiliary
943 programs, such as cmdproxy.exe and hexl.exe, are in
944 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
945 version), version-independent site-lisp is in share/emacs/site-lisp,
946 version-specific Lisp files are in share/emacs/VERSION/lisp and in
947 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
948 files are in share/emacs/VERSION/etc. (Emacs knows about all these
949 directories and will find the files in there automatically; there's no
950 need to set any variables due to this change.)
953 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
954 The backtrace is written to the 'emacs_backtrace.txt' file in the
955 directory where Emacs was running.
958 ** The variable `buffer-file-type' is no longer supported.
959 Setting it has no effect, and %t in the mode-line format is ignored.
960 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
961 modifying it has no effect.
964 ** Lock files now work on MS-Windows.
965 This allows to avoid losing your edits if the same file is being
966 edited in another Emacs session or by another user. See the node
967 "Interlocking" in the Emacs User Manual for the details. To disable
968 file locking, customize `create-lockfiles' to nil.
970 ** Improved fullscreen support on Mac OS X.
971 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
972 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
973 native is the default.
976 * Installation Changes in Emacs 24.3
978 ** The default X toolkit is now Gtk+ version 3.
979 If you don't pass `--with-x-toolkit' to configure, or if you use
980 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
981 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
982 You can explicitly require a specific version by passing
983 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
985 ** New configure option `--enable-link-time-optimization', to utilize
986 an appropriate feature provided by GCC since version 4.5.0.
988 ** New configure option `--without-all' to disable most of the optional
989 features (image support, etc.) that are normally enabled by default.
991 ** New configure option `--enable-gcc-warnings' (for developing/debugging
992 Emacs). If building with GCC, this enables compile-time checks that
993 warn/give errors about possibly-questionable C code. On a recent GNU
994 system there should be no warnings; on older and on non-GNU systems
995 the results may be useful to developers.
997 ** The configure option `--enable-use-lisp-union-type' has been
998 renamed to `--enable-check-lisp-object-type', as the resulting
999 Lisp_Object type no longer uses a union to implement the compile time
1000 check that this option enables.
1002 ** The configure option `--disable-maintainer-mode' has been removed,
1003 as it was confusingly-named and rarely useful.
1005 ** The configure options `--program-prefix', `--program-suffix', and
1006 `--program-transform-name' apply to more than just the installed
1007 binaries. Now they also affect the man pages, icons, and the
1008 etc/emacs.desktop file; but not the info pages, since this would break
1009 links between the various manuals.
1011 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1012 overwriting "emacs" in the installation bin/ directory with a link
1015 ** Emacs uses libtinfo in preference to libncurses, if available.
1017 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1018 /usr/pkg/lib to the linker search path. You must add them yourself if
1021 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1022 (from the bin and libexec directories, respectively). The former is
1023 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1026 * Startup Changes in Emacs 24.3
1028 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1029 lisp/ directory. There should not be any there anyway. If you have
1030 been adding them there, put them somewhere else; e.g., site-lisp.
1032 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1035 * Changes in Emacs 24.3
1039 *** `C-h f' (`describe-function') can now perform autoloading.
1040 When this command is called for an autoloaded function whose docstring
1041 contains a key substitution construct, that function's library is
1042 automatically loaded, so that the documentation can be shown
1043 correctly. To disable this, set `help-enable-auto-load' to nil.
1045 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1046 even after their associated libraries have been loaded (and the
1047 autoloads have been redefined as functions).
1051 *** Images displayed via ImageMagick now support transparency and the
1052 :background image specification property.
1054 *** When available, ImageMagick support is automatically enabled.
1055 It is no longer necessary to call `imagemagick-register-types'
1056 explicitly to install ImageMagick image types; that function is called
1057 automatically at startup, or when customizing an imagemagick- option.
1059 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1060 ImageMagick to view images. (You must call `imagemagick-register-types'
1061 afterwards if you do not use customize to change this.)
1063 *** The new variable `imagemagick-enabled-types' also affects which
1064 ImageMagick types are treated as images. The function
1065 `imagemagick-filter-types' returns the list of types that will be
1068 *** ImageMagick images now support the :max-width and :max-height
1071 *** Some data types aren't auto-detected by ImageMagick. Adding
1072 :format to `create-image' may help if the content type is in the
1073 new variable `image-format-suffixes'.
1077 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1078 next and previous path separator, respectively.
1080 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1081 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1082 non-nil before enabling the mode.
1086 *** New option `mode-line-default-help-echo' specifies the help text
1087 (shown in a tooltip or in the echo area) for any part of the mode line
1088 that does not have its own specialized help text.
1090 *** You can now click mouse-3 in the coding system indicator to invoke
1091 `set-buffer-file-coding-system'.
1093 ** Server and client
1095 *** emacsclient now obeys string values for `initial-buffer-choice',
1096 if it is told to open a new frame without specifying any file to visit
1097 or expression to evaluate.
1099 *** New option `server-auth-key' specifies a shared server key.
1101 ** Emacs now generates backtraces on fatal errors.
1102 On encountering a fatal error, Emacs now outputs a textual description
1103 of the fatal signal, and a short backtrace on platforms like glibc
1104 that support backtraces.
1106 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1107 This minor mode replaces `toggle-read-only', which is now obsolete.
1109 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1110 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1111 respectively, without exiting from the prompt.
1113 ** In the Package Menu, newly-available packages are listed as "new",
1114 and sorted above the other "available" packages by default.
1116 ** If your Emacs was built from a bzr checkout, the new variable
1117 `emacs-bzr-version' contains information about the bzr revision used.
1119 ** New option `create-lockfiles' specifies usage of lockfiles.
1120 It defaults to t. Changing it to nil inhibits the creation of lock
1121 files (use this with caution).
1123 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1124 variables on remote hosts.
1126 ** The entry for PCL-CVS has been removed from the Tools menu.
1127 The PCL-CVS commands are still available via the keyboard.
1129 ** Using "unibyte: t" in Lisp source files is obsolete.
1130 Use "coding: raw-text" instead.
1132 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1133 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1134 The previous binding, introduced in Emacs 24.1, was a mistake, because
1135 `C-c LETTER' bindings are reserved for user customizations.
1137 ** Internationalization
1139 *** New language environment: Persian.
1141 *** New input method `vietnamese-vni'.
1143 ** Nextstep (GNUstep / Mac OS X) port
1145 *** Support for fullscreen and the frame parameter fullscreen.
1147 *** A file dialog is used for open/save operations initiated from the
1151 * Editing Changes in Emacs 24.3
1153 ** Search and Replace
1155 *** Non-regexp Isearch now performs "lax" space matching.
1156 Each sequence of spaces in the supplied search string may match any
1157 sequence of one or more whitespace characters, as specified by the
1158 variable `search-whitespace-regexp'. (This variable is also used by a
1159 similar existing feature for regexp Isearch.)
1161 *** New Isearch command `M-s SPC' toggles lax space matching.
1162 This applies to both ordinary and regexp Isearch.
1164 *** New option `replace-lax-whitespace'.
1165 If non-nil, `query-replace' uses flexible whitespace matching too.
1168 *** Global `M-s _' starts a symbol (identifier) incremental search,
1169 and `M-s _' in Isearch toggles symbol search mode.
1170 `M-s c' in Isearch toggles search case-sensitivity.
1172 ** Navigation commands
1174 *** New binding `M-g c' for `goto-char'.
1176 *** New binding `M-g TAB' for `move-to-column'.
1178 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1179 interactively with no prefix arg. Previously, it moved to column 1.
1181 ** New option `yank-handled-properties' allows processing of text
1182 properties on yanked text, in ways that are more general than just
1183 removing them (as is done by `yank-excluded-properties').
1185 ** New option `delete-trailing-lines' specifies whether
1186 M-x delete-trailing-whitespace should delete trailing lines at the end
1187 of the buffer. It defaults to t.
1189 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1191 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1192 `ucs-insert' is now an obsolete alias for `insert-char'.
1194 ** The `z' key no longer has a binding in most special modes.
1195 It used to be bound to `kill-this-buffer', but `z' is too easy to
1198 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1199 It copies the region-rectangle as the last rectangle kill.
1203 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1205 *** New option `register-separator' specifies the register containing
1206 the text to put between collected texts for use with
1207 M-x append-to-register and M-x prepend-to-register.
1210 * Changes in Specialized Modes and Packages in Emacs 24.3
1212 ** Common Lisp emulation (CL)
1214 *** CL's main entry is now (require 'cl-lib).
1215 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1216 i.e., all its definitions have the "cl-" prefix (and internal definitions
1217 use the "cl--" prefix).
1219 If `cl' provided a feature under the name `foo', then `cl-lib'
1220 provides it under the name `cl-foo' instead; with the exceptions of the
1221 few `cl' definitions that had to use `foo*' to avoid conflicts with
1222 pre-existing Elisp entities. These have been renamed to `cl-foo'
1223 rather than `cl-foo*'.
1225 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1226 provide the old, non-prefixed names. Some exceptions are listed below:
1228 *** `cl-flet' is not like `flet' (which is deprecated).
1229 Instead it obeys the behavior of Common-Lisp's `flet'.
1230 In particular, in cl-flet function definitions are lexically scoped,
1231 whereas in flet the scoping is dynamic.
1233 *** `cl-labels' is slightly different from `labels'.
1234 The difference is that it relies on the `lexical-binding' machinery
1235 (as opposed to the `lexical-let' machinery used previously) to capture
1236 definitions in closures, so such closures will only work if `lexical-binding'
1239 *** `cl-letf' is not exactly like `letf'.
1240 The only difference is in details that relate to some deprecated usage
1241 of `symbol-function' in place forms.
1243 *** `progv' was rewritten to use the `let' machinery.
1244 A side effect is that variables without corresponding values are bound
1245 to nil rather than being made unbound.
1247 *** The following methods of extending `setf' are obsolete
1248 (use features from gv.el instead):
1249 `define-modify-macro' (use `gv-letplace')
1250 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1251 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1252 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1256 *** Changes are now highlighted using the same color scheme as in
1257 modern VCSes. Deletions are displayed in red (new faces
1258 `diff-refine-removed' and `smerge-refined-removed', and new definition
1259 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1260 and `smerge-refined-added', and new definition of `diff-added').
1262 *** The variable `diff-use-changed-face' defines whether to use the
1263 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1264 changes in context diffs.
1266 *** The new command `diff-delete-trailing-whitespace' removes trailing
1267 whitespace introduced by a diff.
1269 ** Ediff now uses the same color scheme as Diff mode.
1273 A new version of python.el, which provides several new features, including:
1274 per-buffer shells, better indentation, Python 3 support, and improved
1275 shell-interaction compatible with iPython (and virtually any other
1278 *** Some user options have been replaced/renamed, including (old -> new):
1279 **** python-indent -> python-indent-offset
1280 **** python-guess-indent -> python-indent-guess-indent-offset
1281 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1282 **** python-use-skeletons -> python-skeleton-autoinsert
1284 *** Some user options have been removed, including:
1286 **** `python-indent-string-contents': Strings are never indented.
1288 **** `python-honour-comment-indentation':
1289 Comments are always considered as indentation markers.
1291 **** `python-continuation-offset': Indentation is automatically
1292 calculated in a pep8 compliant way depending on the context.
1294 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1295 Have no direct mapping as the shell interaction is completely different.
1297 **** `python-python-command', `python-jython-command':
1298 Replaced by `python-shell-interpreter'.
1300 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1301 `python-pdbtrack-minor-mode-string', `python-source-modes':
1304 *** Some commands have been replaced (old -> new):
1305 **** python-insert-class -> python-skeleton-class
1306 **** python-insert-def -> python-skeleton-def
1307 **** python-insert-for -> python-skeleton-for
1308 **** python-insert-if -> python-skeleton-if
1309 **** python-insert-try/except -> python-skeleton-try
1310 **** python-insert-try/finally -> python-skeleton-try
1311 **** python-insert-while -> python-skeleton-while
1312 **** python-find-function -> python-nav-jump-to-defun
1313 **** python-next-statement -> python-nav-forward-sentence
1314 **** python-previous-statement -> python-nav-backward-sentence
1315 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1316 **** python-end-of-defun-function -> python-nav-end-of-defun
1317 **** python-send-buffer -> python-shell-send-buffer
1318 **** python-send-defun -> python-shell-send-defun
1319 **** python-send-region -> python-shell-send-region
1320 **** python-send-region-and-go -> emulate with python-shell-send-region
1321 and python-shell-switch-to-shell
1322 **** python-send-string -> python-shell-send-string
1323 **** python-switch-to-python -> python-shell-switch-to-shell
1324 **** python-describe-symbol -> python-eldoc-at-point
1328 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1330 *** The D-Bus object manager interface is implemented.
1332 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1333 if their value does not fit into Emacs's integer range.
1335 *** The function `dbus-call-method' is now non-blocking.
1336 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1338 *** Signals can also be sent as unicast messages.
1340 *** The argument list of `dbus-register-signal' has been extended,
1341 according to the new match rule types of D-Bus.
1343 *** `dbus-init-bus' supports private connections.
1345 *** There is a new function `dbus-setenv'.
1347 ** `desktop-path' no longer includes the "." directory.
1348 Desktop files are now located in ~/.emacs.d by default.
1352 *** `dired-do-async-shell-command' executes each file sequentially
1353 if the command ends in `;' (when operating on multiple files).
1354 Otherwise, it executes the command on each file in parallel.
1356 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1357 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1360 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1361 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1362 mark/unmark/flag all files in the active region.
1364 *** The minibuffer default for `=' (`dired-diff') has changed.
1365 It is now the backup file for the file at point, if one exists.
1366 In Transient Mark mode the default is the file at the active mark.
1368 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1369 The global binding for `M-=', `count-words-region' is in effect.
1373 *** New module "notifications", which can send a notification when you
1374 receive a private message or your nickname is mentioned.
1376 *** ERC will look up server/channel names via auth-source and use any
1379 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1380 only applies to messages sent by lurkers.
1382 ** reStructuredText mode
1384 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1385 fontification, comment handling, and customization have all been revised
1388 *** Support for `imenu' and `which-function-mode'.
1390 *** The reStructuredText syntax is more closely covered.
1391 Sphinx support has been improved.
1393 *** `rst-insert-list' inserts new list or continues existing lists.
1395 *** A negative prefix argument always works for `rst-adjust'.
1397 *** The window configuration is reset after displaying a TOC.
1399 *** The constant `rst-version' describes the rst.el package version.
1403 *** Support for percent literals and recognition of regular expressions
1404 in method calls without parentheses with more methods, including Cucumber
1407 *** Improved syntax highlighting and indentation.
1409 *** New command `ruby-toggle-block', bound to `C-c {'.
1411 *** Some non-standard keybindings/commands have been removed:
1413 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1415 **** `ruby-mark-defun'; use `mark-defun'.
1417 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1418 appropriate settings for the variables `beginning-of-defun-function'
1419 and `end-of-defun-function'.
1421 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1422 `reindent-then-newline-and-indent' and `newline' have been removed.
1424 ** Shell Script mode
1426 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1428 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1430 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1434 *** The free software compiler GHDL is supported (and now the default).
1436 *** Support for the VHDL-AMS packages has been added/updated.
1438 *** Updated to the 2002 revision of the VHDL standard.
1440 *** Accepts \r and \f as whitespace.
1444 *** The faces used by Apropos are now directly customizable.
1445 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1446 see the `apropos' Custom group for details.
1448 *** The old options whose values specified faces to use have been removed
1449 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1453 *** This package has been rewritten to use Tabulated List mode.
1455 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1456 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1460 *** Algebraic simplification mode is now the default.
1461 To restrict to the limited simplifications given by the former
1462 default simplification mode, use `m I'.
1466 *** You can customize the header text that appears above each calendar month.
1467 See the variable `calendar-month-header'.
1469 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1471 *** The calendars produced by cal-html include holidays.
1472 Customize `cal-html-holidays' to change this.
1476 *** The major modes from the parser generators "Bovine" and "Wisent"
1477 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1478 are in `auto-mode-alist', and the corresponding manuals are included.
1482 **** Menu support for the "Configuration" feature. This allows users to
1483 choose the active configuration (such as debug or install) from the menu.
1485 **** New command `ede-set' to interactively set project-local variables.
1487 **** Support for compiling, debugging, and running in "generic" projects.
1489 **** Autoconf editing support for M4 macros with complex arguments.
1491 **** Compilation support for the "linux" project type.
1493 **** "simple" projects have been removed; use "generic" projects instead.
1497 **** Support for parsing #include statements inside a namespace in C/C++.
1499 **** Improved support for 'extern "C"' declarations in C/C++.
1501 **** The ability to ignore more common special C/C++ preprocessor symbols,
1502 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1503 If available, include cdefs.h as an additional source of preprocessor symbols.
1505 **** Improved C/C++ function pointer parsing.
1507 **** In Python, support for converting imports to include file names.
1509 **** Ability to dynamically determine the Python load path.
1511 **** Support for the Python 'WITH' and 'AT' keywords.
1513 **** Improved tooltip completion.
1517 **** The SRecode manual is now included.
1519 **** Tag generation supports constructor/destructor settings and system
1520 include differentiation.
1522 **** Addition of 'Framework' support: Frameworks are specified when a
1523 particular kind of library (such as Android) is needed in a common language
1526 **** Support for nested templates and let variables override based on priority.
1528 **** Support for merging tables from multiple related modes, such as
1529 default -> c++ -> arduino.
1531 ** Compile has a new option `compilation-always-kill'.
1535 *** `custom-reset-button-menu' now defaults to t.
1537 *** Non-option variables are never matched in `customize-apropos' and
1538 `customize-apropos-options' (i.e., the prefix argument does nothing for
1539 these commands now).
1543 *** The variables `term-default-fg-color' and `term-default-bg-color'
1544 are now deprecated in favor of the customizable face `term'.
1546 *** You can customize how to display ANSI terminal colors and styles
1547 by customizing the corresponding `term-color-<COLOR>',
1548 `term-color-underline' and `term-color-bold' faces.
1552 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1554 *** Remote processes are now also supported on remote MS-Windows hosts.
1558 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1559 Previously, this slot stored semicolon-separated attribute-value pairs
1560 appended to some imap URLs, but this is not compatible with RFC 3986.
1561 So now the `filename' slot stores the entire path and query components,
1562 and the `attributes' slot is always nil.
1564 *** New function `url-encode-url' for encoding a URI string.
1565 The `url-retrieve' function now uses this to encode its URL argument,
1566 in case that is not properly encoded.
1568 *** New command `url-cookie-list' displays all the current cookies, and
1569 allows deleting selected cookies.
1571 ** notifications.el supports now version 1.2 of the Notifications API.
1572 The function `notifications-get-capabilities' returns the supported
1575 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1576 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1577 `flymake-warning-bitmap'.
1579 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1580 specifying URL types that should be converted to remote file names at
1581 the FFAP prompt. The default is now '("ftp").
1583 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1584 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1586 ** New option `mouse-avoidance-banish-position' specifies where the
1587 `banish' mouse avoidance setting moves the mouse.
1589 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1590 closing brackets to be aligned with the line of the opening bracket.
1592 ** In Proced mode, new command `proced-renice' renices marked processes.
1594 ** New option `async-shell-command-buffer' specifies the buffer to use
1595 for a new asynchronous `shell-command' when the default output buffer
1596 `*Async Shell Command*' is already in use.
1598 ** SQL mode has a new option `sql-db2-escape-newlines'.
1599 If non-nil, newlines sent to the command interpreter will be escaped
1600 by a backslash. The default does not escape the newlines and assumes
1601 that the sql statement will be terminated by a semicolon.
1603 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1604 (and modes that derive from it), sorts the column at point, or the Nth
1605 column if a numeric prefix argument is given.
1607 ** `which-func-modes' now defaults to t, so Which Function mode, when
1608 enabled, applies to all applicable major modes.
1610 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1613 ** Follow mode no longer works by using advice.
1614 The option `follow-intercept-processes' has been removed.
1616 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1618 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1619 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1620 *** semantic-change-hooks -> semantic-change-functions
1621 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1622 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1623 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1624 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1625 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1626 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1627 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1628 *** rcirc-activity-hooks -> rcirc-activity-functions
1629 *** rcirc-print-hooks -> rcirc-print-functions
1630 *** dbus-event-error-hooks -> dbus-event-error-functions
1631 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1632 *** checkdoc-style-hooks -> checkdoc-style-functions
1633 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1634 *** archive-extract-hooks -> archive-extract-hook
1635 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1636 *** hfy-post-html-hooks -> hfy-post-html-hook
1637 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1638 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1639 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1640 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1642 ** Obsolete packages
1645 In most cases, assoc+member+push+delq work just as well.
1646 And in any case it's just a terrible package: ugly semantics, terrible
1647 inefficiency, and not namespace-clean.
1656 * Incompatible Lisp Changes in Emacs 24.3
1658 ** Docstrings starting with `*' no longer indicate user options.
1659 Only variables defined using `defcustom' are considered user options.
1660 The function `user-variable-p' is now an obsolete alias for
1661 `custom-variable-p'.
1663 ** The return values of `defalias', `defun' and `defmacro' have changed,
1664 and are now undefined. For backwards compatibility, `defun' and
1665 `defmacro' currently return the name of the newly defined
1666 function/macro, but this should not be relied upon.
1668 ** `random' by default now returns a different random sequence in
1669 every Emacs run. Use `(random S)', where S is a string, to set the
1670 random seed to a value based on S, in order to get a repeatable
1671 sequence in later calls.
1673 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1674 that substring is inserted literally even if the LITERAL arg is
1675 non-nil, instead of causing an error to be signaled.
1677 ** `select-window' now always makes the window's buffer current.
1678 It does so even if the window was selected before.
1680 ** The function `x-select-font' can return a font spec, instead of a
1681 font name as a string. Whether it returns a font spec or a font name
1682 depends on the graphical library.
1684 ** `face-spec-set' no longer sets frame-specific attributes when the
1685 third argument is a frame (that usage was obsolete since Emacs 22.2).
1687 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1689 ** The CL package's `get-setf-method' function no longer exists.
1690 Generalized variables are now part of core Emacs Lisp, and implemented
1691 differently to the way cl.el used to do it. It is not possible to
1692 define a compatible replacement for `get-setf-method'. See the file
1693 gv.el for internal details of the new implementation.
1695 ** The arguments of `dbus-register-signal' are no longer just strings,
1696 but keywords or keyword-string pairs. The old argument list will
1697 still be supported for Emacs 24.x.
1699 ** Miscellaneous name changes
1700 Some Lisp symbols have been renamed to correct their spelling,
1701 or to be more consistent with standard Emacs terminology.
1703 *** Renamed functions
1704 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1705 **** inactivate-input-method -> deactivate-input-method
1706 **** quail-inactivate -> quail-deactivate
1707 **** robin-inactivate -> robin-deactivate
1708 **** viper-inactivate-input-method -> viper-deactivate-input-method
1709 **** viper-inactivate-input-method-action ->
1710 viper-deactivate-input-method-action
1711 **** ucs-input-inactivate -> ucs-input-deactivate
1714 The old hooks are still supported for backward compatibility, but they
1715 are deprecated and will be removed eventually.
1716 **** input-method-inactivate-hook -> input-method-deactivate-hook
1717 **** robin-inactivate-hook -> robin-deactivate-hook
1718 **** quail-inactivate-hook -> quail-deactivate-hook
1720 *** Renamed variables
1721 **** follow-deactive-menu -> follow-inactive-menu
1722 **** inactivate-current-input-method-function ->
1723 deactivate-current-input-method-function
1725 ** Some obsolete functions, variables, and faces have been removed:
1726 *** `last-input-char', `last-command-char', `unread-command-char'
1727 *** `facemenu-unlisted-faces'
1728 *** `rmail-decode-mime-charset'
1729 *** `iswitchb-read-buffer'
1730 *** `sc-version', `sc-submit-bug-report'
1731 *** `set-char-table-default'
1732 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1733 *** `compile-internal'
1735 *** `mode-line-inverse-video'
1736 *** `follow-mode-off-hook'
1737 *** `cvs-commit-buffer-require-final-newline'
1738 (use `log-edit-require-final-newline' instead)
1739 *** `cvs-changelog-full-paragraphs'
1740 (use `log-edit-changelog-full-paragraphs' instead)
1741 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1742 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1743 *** `vc-master-templates' (use `vc-handled-backends' instead)
1744 *** `vc-checkout-carefully'
1747 * Lisp Changes in Emacs 24.3
1749 ** CL-style generalized variables are now in core Elisp.
1750 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1751 You can define your own generalized variables using `gv-define-simple-setter',
1752 `gv-define-setter', etc.
1754 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1755 This can significantly speed up execution of non-byte-compiled code,
1756 but can also bump into previously unnoticed cyclic dependencies.
1757 These are generally harmless: they will simply cause the macro calls
1758 to be left for later expansion (as before), but will result in a
1759 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1760 You may wish to restructure your code so this does not happen.
1762 ** New sampling-based Elisp profiler.
1763 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1764 When finished, use M-x profiler-stop. The sampling rate can be based on
1765 CPU time or memory allocations.
1767 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1768 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1770 ** New macros `setq-local' and `defvar-local'.
1772 ** Face underlining can now use a wave.
1774 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1775 of `read-regexp' accepts a string ending with a colon and space, and its
1776 second argument DEFAULTS can be a list of strings accessible via `M-n'
1777 in the minibuffer ahead of other hard-coded useful regexp-related values.
1778 More commands use `read-regexp' now to read their regexp arguments.
1782 *** New function `completion-table-with-quoting' to handle completion
1783 in the presence of quoting, such as file completion in shell buffers.
1785 *** New function `completion-table-subvert' to use an existing completion
1786 table, but with a different prefix.
1790 *** New error type and new function `user-error'.
1791 These do not trigger the debugger.
1793 *** New option `debugger-bury-or-kill', saying what to do with the
1794 debugger buffer when exiting debug.
1796 *** Set `debug-on-message' to enter the debugger when a certain
1797 message is displayed in the echo area. This can be useful when trying
1798 to work out which code is doing something.
1800 *** New var `inhibit-debugger', automatically set to prevent accidental
1801 recursive invocations.
1805 *** New command `fit-frame-to-buffer' adjusts the frame height to
1808 *** The command `fit-window-to-buffer' can adjust the frame height
1809 if the new option `fit-frame-to-buffer' is non-nil.
1811 *** New macro `with-temp-buffer-window', similar to
1812 `with-output-to-temp-buffer'.
1814 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1817 *** New option `switch-to-buffer-preserve-window-point' to restore a
1818 window's point when switching buffers.
1820 *** New display action alist entry `no-display-ok' to indicate the
1821 caller of `display-buffer' is ready to handle the case of not
1822 displaying the buffer.
1824 *** New display action alist entries `window-height' and `window-width'
1825 specify the size of new windows created by `display-buffer'.
1827 *** New display action alist entry `pop-up-frame-parameters', if
1828 non-nil, specifies frame parameters to give any newly-created frame.
1830 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1831 tells display action functions to avoid changing which frame is
1834 *** New display action alist entry `previous-window', if non-nil,
1835 specifies window to reuse in `display-buffer-in-previous-window'.
1837 *** New display action functions `display-buffer-below-selected',
1838 and `display-buffer-in-previous-window'.
1840 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1841 now accept a third argument to avoid choosing the selected window.
1843 *** Additional values recognized for option `window-combination-limit'.
1845 *** The following variables are obsolete, as they can be replaced by
1846 appropriate entries in the `display-buffer-alist' function introduced
1848 **** `dired-shrink-to-fit'
1849 **** `display-buffer-reuse-frames'
1850 **** `display-buffer-function'
1851 **** `special-display-buffer-names'
1852 **** `special-display-frame-alist'
1853 **** `special-display-function'
1854 **** `special-display-regexps'
1858 *** `current-time-string' no longer requires that its argument's year
1859 must be in the range 1000..9999. It now works with any year supported
1860 by the underlying C implementation.
1862 *** `current-time' now returns extended-format time stamps
1863 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1864 PSEC is typically a multiple of 1000 on current machines. Other
1865 functions that use this format, such as `file-attributes' and
1866 `format-time-string', have been changed accordingly. Old-format time
1867 stamps are still accepted.
1869 *** The format of timers in `timer-list' and `timer-idle-list' is now
1870 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1871 The PSECS slot is new, and uses picosecond resolution. It can be
1872 accessed via the new `timer--psecs' accessor.
1874 *** Last-modified time stamps in undo lists now are of the form
1875 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1879 *** Improved security when handling persistent objects:
1881 **** `eieio-persistent-read' now features optional arguments for specifying
1882 the class to load, as well as a flag stating whether subclasses are allowed;
1883 if provided, other classes will be rejected by the reader. For
1884 compatibility with existing code, if the class is omitted only a
1887 **** New specialized reader for pulling in classes and signaling errors
1888 without evaluation of suspicious code.
1890 **** All slots that contain objects must have a :type. Slots with lists
1891 of objects must use a new type predicate for a list of an object type.
1893 *** Support for `find-function' and similar utilities, through the addition
1894 of filename support to generated symbols.
1896 ** Floating point functions now always return special values like NaN,
1897 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1898 Previously, they returned NaNs on some platforms but signaled errors
1899 on others. The affected functions are acos, asin, tan, exp, expt,
1900 log, log10, sqrt, and mod.
1902 ** New fringe bitmap `exclamation-mark'.
1904 ** Miscellaneous changes to special forms and macros
1906 *** `defun' and `defmacro' are now macros rather than special forms.
1908 *** `kbd' is now a function rather than a macro.
1910 ** Miscellaneous new functions
1912 *** `set-temporary-overlay-map' sets up a temporary keymap that
1913 takes precedence over most other maps for a short while (normally one key).
1915 *** `autoloadp' tests if its argument is an autoloaded object.
1917 *** `autoload-do-load' performs the autoloading operation.
1919 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1921 *** `file-name-base' returns a file name sans directory and extension.
1923 *** `function-get' fetches a function property, following aliases.
1925 *** `posnp' tests if an object is a `posn'.
1927 *** `system-users' returns the user names on the system.
1929 *** `system-groups' returns the group names on the system.
1931 *** `tty-top-frame' returns the topmost frame of a text terminal.
1933 ** The following functions and variables are obsolete:
1934 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1935 *** `buffer-has-markers-at'
1936 *** `macro-declaration-function' (use `macro-declarations-alist')
1937 *** `window-system-version' (provides no useful information)
1938 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1939 *** `query-replace-interactive'
1940 *** `font-list-limit' (has had no effect since Emacs < 23)
1943 * Changes in Emacs 24.3 on Non-Free Operating Systems
1945 ** Cygwin builds can use the native MS Windows user interface.
1946 Pass `--with-w32' to configure. The default remains the X11 interface.
1948 ** Two new functions are available in Cygwin builds:
1949 `cygwin-convert-file-name-from-windows' and
1950 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1951 code to access the Cygwin file-name mapping machinery to convert
1952 between Cygwin and Windows-native file and directory names.
1954 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1955 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1956 `mouse-autoselect-window'.
1958 ** On MS Windows Vista and later Emacs now supports symbolic links.
1960 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1961 support for libxml2, even if its presence is detected.
1963 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1965 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1966 directories to the search path. You must add them yourself if you want them.
1969 * Changes in Emacs 24.2
1971 ** This is mainly a bug-fix release.
1974 * Installation Changes in Emacs 24.1
1976 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1977 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1978 also depend on Gtk+. You can disable them with --without-rsvg and
1981 ** Emacs can be compiled with GnuTLS support.
1982 This happens by default if a suitably recent version of the library is
1983 found at build time. To prevent this, use the configure option
1984 `--without-gnutls'. See below for GnuTLS features.
1986 ** Emacs can be compiled with SELinux support.
1987 This happens by default if a suitably recent version of the library is
1988 found at build time. To prevent this, use the configure option
1989 `--without-selinux'. See below for SELinux features.
1991 ** Emacs can be compiled with ImageMagick support.
1992 This happens by default if a suitably recent version of the library is
1993 found at build time. To prevent this, use the configure option
1994 `--without-imagemagick'. See below for ImageMagick features.
1995 This feature is not available for the Nextstep or MS ports.
1997 ** Emacs can be compiled with libxml2 support.
1998 This happens by default if a suitably recent version of the library is
1999 found at build time. To prevent this, use the configure option
2000 `--without-xml2'. See below for libxml2 features.
2002 ** By default, the installed Info and man pages are compressed.
2003 You can disable this by configuring --without-compress-info.
2005 ** New configure option --with-wide-int.
2006 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2007 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2010 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2011 These provide no new functionality, they just remove the need to edit
2012 lib-src/Makefile by hand in order to use the associated features.
2014 ** New configure option --enable-use-lisp-union-type.
2015 This is only useful for Emacs developers to debug certain types of bugs.
2016 This is not a new feature; only the configure flag is new.
2018 ** The standalone programs digest-doc and sorted-doc are removed.
2019 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2021 ** The standalone program `fakemail' is removed.
2022 If you need it, feedmail.el provides a superset of the functionality.
2025 * Startup Changes in Emacs 24.1
2027 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2028 command line arguments, and the EMACS_UNIBYTE environment variable, no
2029 longer have any effect. (They were declared obsolete in Emacs 23.)
2031 ** New command line option `--no-site-lisp' removes site-lisp directories
2032 from load-path. -Q now implies this. This option does not affect the
2033 EMACSLOADPATH environment variable (and hence has no effect for
2037 * Changes in Emacs 24.1
2041 *** Many packages now use the `completion-at-point' command,
2042 rather than implementing separate completion commands.
2044 *** `completion-at-point' now handles tags and semantic completion.
2046 *** Completion in a non-minibuffer now tries to detect the end of completion
2047 and pops down the *Completions* buffer accordingly.
2049 *** New option `completion-cycle-threshold' allows completion cycling.
2051 *** New option `completion-category-overrides' for overriding the
2052 default completion style in certain circumstances.
2054 *** New completion style `substring'.
2056 *** Completion of buffer names uses `substring' completion by default.
2058 *** The option `widget-complete-field' has been removed.
2062 *** The first time you try sending mail, Emacs asks for a mail method.
2063 This is implemented by a new default for `send-mail-function', which
2064 is `sendmail-query-once'. This offers to use the smtpmail package, or
2065 to use the old defaults relying on external mail facilities
2066 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2067 `mailclient-send-it' on Windows).
2069 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2070 transfers the report to your desktop's preferred mail client, if there
2071 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2074 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2075 and Mail mode changes
2077 ** Emacs server and client changes
2079 *** New option `server-port' specifies the port for TCP Emacs servers.
2081 *** New emacsclient argument -q/--quiet suppresses some status messages.
2083 *** New emacsclient argument --frame-parameters specifies the frame
2084 parameters of any newly-created graphical frame.
2086 *** If emacsclient shuts down due to Emacs signaling an error,
2087 its exit status is 1.
2089 *** New emacsclient argument --parent-id ID.
2090 This opens a client frame in parent X window ID, via XEmbed, similar
2091 to the --parent-id argument to Emacs.
2093 ** Internationalization changes
2095 *** Emacs now supports display and editing of bidirectional text.
2096 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2097 displayed in the correct visual order as expected by users of those
2098 scripts. The display reordering is a "full bidirectionality" class
2099 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2100 with no RTL text should look exactly the same as before.
2102 **** New buffer-local variable `bidi-display-reordering'.
2103 To disable display reordering in a buffer, change this to nil.
2105 **** New buffer-local variable `bidi-paragraph-direction'.
2106 If nil (the default), Emacs determines the base direction of each
2107 paragraph from its text, as specified by the UBA. Setting the value
2108 to `right-to-left' or `left-to-right' forces a base direction on each
2111 Paragraphs with right-to-left base direction are displayed starting at
2112 the right window edge.
2114 *** Enhanced support for characters with no glyphs in available fonts,
2115 or, on text terminals, characters that cannot be encoded by the
2116 terminal coding system. The new option `glyphless-char-display-control'
2117 specifies how to display them: as a hexadecimal code in a box, a thin
2118 1-pixel space, an empty box, etc.
2120 *** New input methods for Farsi and Bulgarian
2121 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2123 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2124 (U+2010 and U+2011).
2126 *** New Hebrew translation of the Emacs Tutorial.
2127 Type `C-u C-h t' to choose it in case your language setup doesn't
2128 automatically select it.
2130 ** An Emacs Lisp package manager is now included.
2131 This is a convenient way to download and install additional packages,
2132 from a package repository at http://elpa.gnu.org.
2134 *** M-x list-packages shows a list of packages, which can be
2135 selected for installation.
2137 *** New command `describe-package', bound to `C-h P'.
2139 *** By default, all installed packages are loaded automatically when
2140 Emacs starts up. To disable this, set `package-enable-at-startup' to
2141 nil. To specify the packages to load, customize `package-load-list'.
2143 ** Custom theme changes
2145 *** New command `M-x customize-themes', which provides a convenient
2146 interface for enabling and disabling Custom themes.
2148 *** New option `custom-theme-load-path' is the load path for themes.
2149 Emacs no longer looks for Custom themes in `load-path'. The default
2150 value of `custom-theme-load-path' says to look for themes in
2151 `custom-theme-directory', followed by a subdirectory of
2152 `data-directory' named "themes/", which contains a small selection of
2153 built-in Custom themes.
2155 *** New option `custom-safe-themes' records known-safe theme files.
2156 If a theme is not in this list, Emacs queries before loading it, and
2157 offers to save the theme to `custom-safe-themes' automatically. By
2158 default, all themes included in Emacs are treated as safe.
2160 ** Improved GTK integration
2162 *** GTK scroll-bars are now placed on the right by default.
2163 The function `set-scroll-bar-mode' can change this.
2165 *** GTK tool bars can have just text, just images or images and text.
2166 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2167 the default is taken from desktop settings.
2169 *** GTK tool bars can be placed on any edge of the frame.
2170 The frame-parameter tool-bar-position controls this. It takes the
2171 values top, left, right or bottom. The Options => Show/Hide menu has
2174 *** The default colors for selected text (the `region' face) are taken
2175 from the GTK theme when Emacs is built with GTK.
2177 *** Emacs uses GTK tooltips by default if built with GTK.
2178 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2180 ** Graphical interface changes
2182 *** On graphical displays, the mode-line no longer ends in dashes.
2183 Also, the first dash (which does not indicate anything) is just
2184 displayed as a space.
2186 *** `menu-bar-select-buffer-function' lets you choose another operation
2187 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2189 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2190 built with Xft. These fonts can be set via X resources, for example:
2191 Emacs.pane.menubar.font: Courier-12
2195 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2196 or if it receives a SIGINT signal in batch mode.
2198 *** `kill-emacs-hook' is now also run in batch mode.
2199 Third-party code which adds to `kill-emacs-hook' should check if they
2200 do the right thing in batch mode.
2202 ** Scrolling changes
2204 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2205 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2206 of buffer at first key-press (instead they move to top/bottom of buffer)
2207 when `scroll-error-top-bottom' is non-nil.
2209 *** New option `scroll-error-top-bottom' (see above).
2211 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2212 scroll a line instead of full screen.
2214 *** New property `scroll-command' should be set on a command's symbol to
2215 define it as a scroll command affected by `scroll-preserve-screen-position'.
2217 *** If you customize `scroll-conservatively' to a value greater than 100,
2218 Emacs will never recenter point in the window when it scrolls due to
2219 cursor motion commands or commands that move point (e.f., `M-g M-g').
2220 Previously, you needed to use `most-positive-fixnum' as the value of
2221 `scroll-conservatively' to achieve the same effect.
2223 *** "Aggressive" scrolling now honors the scroll margins.
2224 If you customize `scroll-up-aggressively' or
2225 `scroll-down-aggressively' and move point off the window, Emacs now
2226 scrolls the window so as to avoid positioning point inside the scroll
2229 ** Basic SELinux support has been added.
2230 This requires Emacs to be linked with libselinux at build time.
2232 *** Emacs preserves the SELinux file context when backing up.
2233 Also, the function `copy-file' has an extra optional argument for
2234 preserving SELinux context, and the return value of `backup-buffer'
2235 now includes the SELinux context.
2237 *** New functions `file-selinux-context' and `set-file-selinux-context'
2238 get and set the SELinux context of a file.
2242 *** `delete-by-moving-to-trash' now only affects commands that specify
2243 trashing. This avoids inadvertently trashing temporary files.
2245 *** Calling `delete-file' or `delete-directory' with a prefix argument
2246 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2248 ** File- and directory-local variable changes
2250 *** You can stop directory local vars from applying to subdirectories.
2251 Add an element (subdirs . nil) to the alist portion of any variables
2252 settings to indicate that the section should not apply to
2255 *** Directory local variables can apply to some file-less buffers.
2256 Affected modes include dired, vc-dir, and log-edit. For example,
2257 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2258 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2259 `hack-dir-local-variables-non-file-buffer' to support this.
2261 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2262 Instead, use "eval: (minor-mode 1)".
2264 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2265 to `inhibit-local-variables-regexps'. As the name suggests, it now
2266 applies to ALL file local variables, not just -*- lines. The
2267 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2272 *** The `quit-window' command now restores the last buffer displayed
2273 in the quitted window.
2275 *** Resizing an Emacs frame now preserves proportional window sizes,
2276 modulo restrictions like window minimum sizes and fixed-size windows.
2278 *** The behavior of `display-buffer' is now customizable in detail.
2280 **** New option `display-buffer-base-action' specifies a list of
2281 user-determined display "actions" (functions and optional arguments
2282 for choosing the displaying window).
2284 This takes precedence over the default display action, which is
2285 specified by `display-buffer-fallback-action'.
2287 **** New option `display-buffer-alist' maps buffer name regexps to
2288 display actions, taking precedence over `display-buffer-base-action'.
2290 *** New option `window-combination-limit'.
2291 The new option `window-combination-limit' allows to return the space
2292 obtained for resizing or creating a window more reliably to the window
2293 from which such space was obtained.
2295 *** New option `window-combination-resize'.
2296 The new option `window-combination-resize' allows to split a window that
2297 otherwise cannot be split because it's too small by stealing space from
2298 other windows in the same combination. Subsequent resizing or deletion
2299 of the window will resize all windows in the same combination as well.
2301 *** New option `frame-auto-hide-function' lets you choose between
2302 iconifying or deleting a frame when burying a buffer in a dedicated
2303 frame, or quitting a window showing a buffer in a frame of its own.
2305 *** New commands `maximize-window' and `minimize-window'.
2306 These maximize and minimize the size of a window within its frame.
2308 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2309 These functions allow to navigate through the live buffers that have
2310 been shown in a specific window.
2312 ** Minibuffer changes
2314 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2315 This is handy for minibuffer-only frames, and is also used for the feature
2316 where mouse-1 pops up *Messages*"', which can now easily be changed.
2318 *** Minibuffers set `truncate-lines' to nil.
2319 If you want to change the value to something else, you could use
2320 for example `minibuffer-setup-hook'.
2322 ** `auto-mode-case-fold' is now enabled by default.
2324 ** `backup-by-copying-when-mismatch' now defaults to t.
2326 ** New basic faces `error', `warning', `success'.
2327 These are used to highlight text indicating failure, caution or
2328 successful operation.
2330 ** New option `list-colors-sort' defines the color sort order
2331 for `list-colors-display'.
2333 ** The variable `focus-follows-mouse' now always defaults to nil.
2336 * Editing Changes in Emacs 24.1
2340 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2341 `isearch-yank-line'.
2343 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2344 `isearch-yank-kill'.
2346 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2348 ** New commands `count-words-region' and `count-words'.
2350 *** M-= is bound to `count-words-region', not `count-lines-region'.
2351 The `count-words-region' command, when called interactively, reports
2352 the number of lines, words, and characters in the region. It is a
2353 superset of the old `count-lines-region', which is now an obsolete
2356 ** The command `just-one-space' (M-SPC), if given a negative argument,
2357 also deletes newlines around point.
2361 *** New option `delete-active-region'.
2362 If non-nil, [delete] and DEL delete the region if it is active and no
2363 prefix argument is given. If set to `kill', those commands kill
2366 *** New command `delete-forward-char', bound to [delete].
2367 This is meant for interactive use, and obeys `delete-active-region'.
2368 The command `delete-char' does not obey `delete-active-region'.
2370 *** `delete-backward-char' is now a Lisp function.
2371 Apart from obeying `delete-active-region', its behavior is unchanged.
2372 However, the byte compiler now warns if it is called from Lisp; Lisp
2373 callers should use delete-char with a negative argument instead.
2375 *** The option `mouse-region-delete-keys' has been deleted.
2377 ** Selection changes.
2379 The default handling of clipboard and primary selections has been
2380 changed to conform with modern X applications. In short, most
2381 commands for killing and yanking text now use the clipboard, while
2382 mouse commands use the primary selection.
2384 In the following, we provide a list of these changes, followed by a
2385 list of steps to get the old behavior back if you prefer that.
2387 *** `select-active-regions' now defaults to t.
2388 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2389 the kill ring. The selected text is put in the primary selection, if
2390 the system possesses a separate primary selection facility (e.g. X).
2392 **** `select-active-regions' also accepts a new value, `only'.
2393 This means to only set the primary selection for temporarily active
2394 regions (usually made by mouse-dragging or shift-selection);
2395 "ordinary" active regions, such as those made with C-SPC followed by
2396 point motion, do not alter the primary selection.
2398 **** `mouse-drag-copy-region' now defaults to nil.
2400 *** mouse-2 is now bound to `mouse-yank-primary'.
2401 This pastes from the primary selection, ignoring the kill-ring.
2402 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2404 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2406 *** `x-select-enable-primary' now defaults to nil.
2407 Thus, commands that kill text or copy it to the kill-ring (such as
2408 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2410 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2411 exactly equivalent to M-w, C-w, and C-y respectively.
2413 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2414 non-nil by default, as Windows does not support the primary selection
2415 between applications.
2417 *** To return to the previous behavior, do the following:
2419 **** Change `select-active-regions' to nil.
2420 **** Change `mouse-drag-copy-region' to t.
2421 **** Change `x-select-enable-primary' to t (on X only).
2422 **** Change `x-select-enable-clipboard' to nil.
2423 **** Bind `mouse-yank-at-click' to mouse-2.
2425 *** Support for X cut buffers has been removed.
2427 *** X clipboard managers are now supported.
2428 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2430 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2431 in the current rectangle. With a prefix argument, this prompts for a
2432 number to count from and for a format string.
2434 ** `redisplay-dont-pause' now defaults to t.
2435 This makes Emacs feel more responsive to editing commands that arrive
2436 at high rate, e.g. if you lean on some key, because stopping redisplay
2437 in the middle (when this variable is nil) forces more expensive
2438 updates later on, and Emacs appears to be unable to keep up.
2440 ** The behavior of <TAB> for active regions in Text mode has changed.
2441 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2442 when the region is active causes Emacs to indent all the lines in the
2443 region, aligning them with the line previous to the first line in the
2444 region (or with the left margin if there is no previous line).
2446 ** When `occur' is called with a prefix argument, matching strings are
2447 collected into the `*Occur*' buffer without line numbers. If there
2448 are parenthesized subexpressions in the specified regexp, `occur'
2449 reads replacement text that may contain \\& and \\N whose convention
2450 follows `replace-match'.
2453 * Changes in Specialized Modes and Packages in Emacs 24.1
2455 ** Archive Mode has basic support for browsing and updating 7z archives.
2459 *** BibTeX mode now supports biblatex.
2460 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2461 `bibtex-entry-field-alist' is now an obsolete alias for
2462 `bibtex-BibTeX-entry-alist'.
2464 *** New command `bibtex-search-entries', bound to C-c C-a.
2466 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2468 *** New variable `bibtex-search-entry-globally'.
2472 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2474 *** The default browser used by the package is now the "xdg-open" program,
2475 on platforms that support it. This calls your desktop's preferred browser.
2479 *** Support for musical notes.
2481 *** Support for logarithmic units.
2483 *** No longer uses the tex prefix for TeX specific unit names when
2484 using TeX or LaTeX mode.
2486 *** New option to highlight selections using faces.
2488 *** `calc-histogram' has the option of using a vector to determine the bins.
2490 *** New "O" option prefix.
2492 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2494 ** Calendar, Diary, and Appt
2496 *** Diary entries can contain non-printing "comments".
2497 See the variable `diary-comment-start'.
2499 *** Appointments can specify their individual warning times.
2500 See the variable `appt-warning-time-regexp'.
2502 *** The function specified by `appt-disp-window-function' may be passed
2503 lists of arguments if multiple appointments are due at similar times.
2504 If you are using a custom function for this, you should update it.
2506 *** New function `diary-hebrew-birthday'.
2508 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2509 may no longer be nil, but must all be strings.
2511 *** The obsolete (since Emacs 22.1) method of enabling the appt
2512 package by adding `appt-make-list' to `diary-hook' has been removed.
2513 Use `appt-activate' instead.
2515 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2516 appt-issue-message (use the function appt-activate)
2517 appt-visible/appt-msg-window (use the variable appt-display-format)
2519 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2520 view-diary-entries, list-diary-entries, show-all-diary-entries
2524 *** New feature to "guess" the style in an existing buffer.
2525 The main entry point is M-x c-guess.
2527 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2529 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2530 Thus C-M-a will, by default, go to the beginning of the immediate function,
2533 *** "Macros with semicolons" can be registered for correct indentation.
2534 Where such a macro ends a line (no semicolon) the next statement is no longer
2535 parsed as a statement continuation.
2537 ** Comint and modes derived from it use the standard completion code.
2541 *** Compilation mode can be used without Font Lock mode.
2542 `compilation-parse-errors-function' is now obsolete.
2544 *** New variable `compilation-filter-start', which is bound while
2545 `compilation-filter-hook' runs. It records the start position of the
2546 text inserted by `compilation-filter'.
2548 *** `compilation-error-screen-columns' and `compilation-first-column'
2549 are obeyed in the editing buffer. So programming language modes can
2550 set them, whereas previously only the value in the *Compilation*
2555 *** Customize buffers now contain a search field.
2556 The search is performed using `customize-apropos'.
2557 To turn off the search field, set `custom-search-field' to nil.
2559 *** Options in customize group buffers start out hidden if not customized.
2560 Use the arrow to the left of the option name to toggle visibility.
2562 *** custom-buffer-sort-alphabetically now defaults to t.
2564 *** The color widget now has a "Choose" button, which allows you to
2565 choose a color via `list-colors-display'.
2569 *** It is now possible to access buses other than the default system
2572 *** The `dbus-register-method' and `dbus-register-property' functions
2573 optionally do not register names.
2575 *** The new function `dbus-register-service' registers a known service
2576 name on a D-Bus without also registering a property or a method.
2580 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2581 if called with a prefix argument, read a file name from the minibuffer
2582 instead of using the current buffer.
2584 *** The "dired local variables" feature of Dired-x is obsolete.
2585 The standard directory local variables feature replaces it.
2589 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2590 controlling attempts to autojoin a channel.
2592 *** New variable `erc-coding-system-precedence': If we use `undecided'
2593 as the server coding system, this variable will then be consulted.
2594 The default is to decode strings that can be decoded as utf-8 as
2595 utf-8, and do the normal `undecided' decoding for the rest.
2599 *** The default value of `eshell-directory-name' has changed
2600 to be an "eshell" directory in `user-emacs-directory'.
2601 The old "~/.eshell/" directory is still used if it exists, though.
2605 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2606 It now supports multithread non-stop debugging and simultaneous
2607 debugging of several threads.
2611 *** RET (`image-toggle-animation') toggles animation, if applicable.
2612 Animation plays once, unless the option `image-animate-loop' is non-nil.
2616 *** New command M-x info-display-manual displays a named Info manual.
2617 If that manual is already visited in some Info buffer, it displays
2618 that buffer. (This is handy if you have many manuals in many *info*
2619 buffers, and don't remember the name of the buffer visiting the manual
2620 you want to consult.) Otherwise, it loads and displays the manual.
2622 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2623 This is for compatibility with the stand-alone Info reader program,
2624 and also because `Info-edit' is a rarely used command that is disabled
2627 ** Mail mode changes (not Message mode)
2629 *** New command M-x mail-add-attachment for adding MIME attachments
2631 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2632 (Its name is misleading, since it has nothing to do with MIME
2633 attachments.) The old name is now an obsolete alias to the new name.
2635 ** MH-E has been updated to MH-E version 8.3.1.
2636 See MH-E-NEWS for details.
2638 ** Modula-2 mode provides auto-indentation.
2640 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2642 ** nXML mode no longer binds C-RET to `nxml-complete'.
2643 Completion is now performed via `completion-at-point', bound to C-M-i
2644 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2645 default), this performs tag completion.
2647 ** Org mode has been updated to version 7.8.09.
2648 See ORG-NEWS for details.
2650 ** Prolog mode has been completely revamped, with lots of additional
2651 functionality such as more intelligent indentation, electricity,
2652 support for more variants, including Mercury, and a lot more.
2656 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2657 in the Rmail incoming message.
2659 *** The variable `rmail-message-filter' no longer has any effect.
2660 This change was made in Emacs 23.1 but was not advertised at the time.
2661 Try using `rmail-show-message-hook' instead.
2665 *** M-x shell prompts for the shell path name if the default directory
2666 is a remote file name and neither the environment variable $ESHELL nor
2667 the variable `explicit-shell-file-name' is set.
2669 *** TAB is now bound to the standard `completion-at-point' command,
2670 which now implements the pcomplete rules for shell command completion.
2674 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2675 if the mail server supports them. This uses either built-in GnuTLS
2676 support, or the starttls.el library. Customize `smtpmail-stream-type'
2679 *** The variable `smtpmail-auth-credentials' has been removed.
2680 By default, the information is now stored in the file ~/.authinfo.
2681 This was the default value of smtpmail-auth-credentials. If you had
2682 customized smtpmail-auth-credentials to a list of user names and
2683 passwords, those settings are not used. During your first connection
2684 to the smtp server, Emacs will prompt for the user name and password,
2685 and offer to save them to ~/.authinfo. Or you can manually copy the
2686 credentials to ~/.authinfo. For example, if you had
2688 (setq smtpmail-auth-credentials
2689 '(("mail.example.org" 25 "jim" "s!cret")))
2691 then the equivalent line in ~/.authinfo would be
2693 machine mail.example.org port 25 login jim password s!cret
2695 See the auth-source manual for more information, e.g. on encrypting
2696 the credentials file.
2698 *** The variable `smtpmail-starttls-credentials' has been removed.
2699 If you had that set, you need to put
2701 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2703 in your ~/.authinfo file instead.
2705 *** SMTPmail defaults to using the address in the From: header as the
2706 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2707 to the address you wish to use instead.
2711 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2712 and `sql-oracle-scan-on'.
2714 *** New options controlling prompting for login parameters.
2715 Each supported product has a custom variable `sql-*-login-params',
2716 which is a list of the parameters to be prompted for before a
2717 connection is established.
2719 *** The command `sql-product-interactive' now takes a prefix argument,
2720 which causes it to prompt for an SQL product.
2722 *** Product-specific SQL interactive commands now take prefix arguments.
2723 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2724 given a prefix argument, prompt for a name for the SQL interactive
2725 buffer. This reduces the need for calling `sql-rename-buffer'.
2727 *** SQL interactive modes suppress command continuation prompts, and
2728 replace tabs with spaces. The first change impacts multiple line SQL
2729 statements entered with C-j between each line, statements yanked into
2730 the buffer and statements sent with `sql-send-*' functions. The
2731 second prevents the MySQL and Postgres interpreters from listing
2732 object name completions when sent text via `sql-send-*' functions.
2734 *** New command `sql-connect' starts a predefined SQLi session,
2735 using the login parameters from `sql-connection-alist'.
2737 *** New "Save Connection" menu item in SQLi buffers.
2738 This gathers the login params specified for the SQLi session, if it
2739 was not started by a connection, and saves them as a new connection.
2741 *** New commands for listing database objects and details:
2742 sql-list-all and sql-list-table.
2744 *** An API for manipulating SQL product definitions has been added.
2748 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2752 *** New inline access method "ksu" (kerberized su).
2754 *** The following access methods are discontinued: "ssh1_old",
2755 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2757 *** The user option `remote-file-name-inhibit-cache' controls whether
2758 remote file attributes are cached for better performance.
2760 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2761 default value to "".
2763 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2764 for remote machines which support SELinux.
2766 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2767 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2768 the degree of parallelism.
2770 ** VC and related modes
2772 *** Support for pulling on distributed version control systems.
2773 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2774 supported (currently with Bzr, Git, and Mercurial), to update the
2775 current branch and working tree. A prefix argument means to prompt
2776 the user for specifics, e.g. a pull location.
2778 *** `vc-update' is now an alias for `vc-pull'.
2780 *** Support for merging on distributed version control systems.
2781 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2782 is supported (currently with Bzr, Git, and Mercurial), to merge
2783 changes from another branch into the current one. It prompts for
2784 specifics, e.g. a merge source.
2786 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2787 shows a diff while querying the user. It defaults to t.
2789 *** Log entries in some Log View buffers can be toggled to display a
2790 longer description by typing RET (log-view-toggle-entry-display).
2791 This is currently supported for Bzr, Git, and Mercurial (to support
2792 another backend, define a `log-view-expanded-log-entry-function').
2793 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2794 use this to display the full log entry for the revision at point.
2796 *** New command `vc-ediff' allows visual comparison of two revisions
2797 of a file similar to `vc-diff', but using ediff backend.
2799 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2800 this was not advertised at the time.
2802 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2803 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2804 this was not advertised at the time.
2810 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2812 *** partial-completion-mode (complete.el) is obsolete.
2813 You can get a comparable behavior with:
2814 (setq completion-styles '(partial-completion initials))
2815 (setq completion-pcm-complete-word-inserts-delimiters t)
2817 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2819 *** pgg is obsolete (use EasyPG instead).
2821 *** sregex.el is obsolete, since rx.el is a strict superset.
2823 *** s-region.el and pc-select.el are obsolete.
2824 They are superseded by shift-select-mode, enabled by default since 23.1.
2826 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2830 *** The Landmark game is now invoked with `landmark', not `lm'.
2831 Its functions and variables have been similarly renamed.
2833 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2834 (This interfered with cua-mode.)
2836 *** f90.el has some support for Fortran 2008 syntax.
2838 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2840 *** New command `nato-region' converts text to NATO phonetic alphabet.
2843 * New Modes and Packages in Emacs 24.1
2845 ** Occur Edit mode applies edits made in *Occur* buffers to the
2846 original buffers. It is bound to "e" in Occur mode.
2848 ** New global minor mode electric-pair-mode.
2849 When enabled, typing an open parenthesis automatically inserts the
2850 matching closing one.
2852 ** New global minor mode electric-indent-mode.
2853 When enabled, typing certain characters triggers reindentation.
2854 Major modes wishing to use this can set electric-indent-chars or
2855 electric-indent-functions.
2857 ** New global minor mode electric-layout-mode.
2858 When enabled, typing certain characters automatically inserts newlines.
2859 Major modes wishing to use this can set electric-layout-rules.
2861 ** tabulated-list.el provides a generic major mode for tabulated data,
2862 from which other modes can be derived.
2864 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2866 ** secrets.el is an implementation of the Secret Service API, an
2867 interface to password managers like GNOME Keyring or KDE Wallet. The
2868 Secret Service API requires D-Bus for communication. The command
2869 `secrets-show-secrets' offers a buffer with a visualization of the
2872 ** notifications.el provides an implementation of the Desktop
2873 Notifications API. It requires D-Bus for communication.
2875 ** soap-client.el supports access to SOAP web services from Emacs.
2876 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2878 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2880 ** New emacs-lock.el package.
2881 The previous version has been moved to obsolete/old-emacs-lock.el.
2882 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2883 against exiting Emacs and killing the buffer can be set separately.
2884 The mechanism for automatically turning off protection for buffers
2885 with dead inferior processes has been generalized.
2888 * Incompatible Lisp Changes in Emacs 24.1
2890 ** Passing a nil argument to a minor mode function call now ENABLES
2891 the minor mode unconditionally. This is so that you can write e.g.
2893 (add-hook 'text-mode-hook 'foo-mode)
2895 to enable foo-mode in Text mode buffers, removing the need for
2896 `turn-on-foo-mode' style functions. This affects all mode commands
2897 defined by `define-minor-mode'. If called interactively, the mode
2898 command still toggles the minor mode.
2900 ** The return value of `backup-buffer' has changed.
2901 It is now a list of three elements, where the second element is a list
2902 describing the original file's SELinux context. If Emacs or the
2903 system lacks SELinux support, the context list is (nil nil nil nil).
2904 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2906 ** `char-direction-table' and the `char-direction' function were deleted.
2907 They were buggy and inferior to the new support of bidirectional
2908 editing introduced in Emacs 24. If you need the bidirectional
2909 properties of a character, use `get-char-code-property' with the last
2910 argument `bidi-class'.
2912 ** `copy-directory' now copies the source directory as a subdirectory
2913 of the target directory, if the latter is an existing directory. The
2914 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2915 the contents directly into a pre-existing target directory.
2917 ** For mouse click input events in the text area, the Y pixel
2918 coordinate in the POSITION list now counts from the top of the text
2919 area, excluding any header line. Previously, it counted from the top
2922 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2923 been further reduced. Now a backquote not followed by a space is
2924 always treated as a "new-style" backquote. Please remove all
2925 "old-style" backquotes from your code. If your code uses backquotes
2926 as documented in the Elisp manual, and compiles without warning, then
2927 you have nothing to do in this regard. Code not following the
2928 appropriate conventions may fail to compile.
2930 The most common cause of trouble seems to be an old-style backquote
2931 followed by a newline. Another cause of trouble is vector notation
2932 for key sequence notation: instead of [(control ,)] and [(control ')],
2933 you should write [(control ?,)] and [(control ?')], which will work in
2936 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2937 was not advertised at the time. The function `custom-initialize-delay'
2938 replaced all known uses.
2940 ** `view-buffer' now treats special mode-class in the same way that
2941 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2942 major mode is special).
2944 ** Menu and tool bar changes
2946 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2947 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2948 With these alist entries omitted, `make-frame' checks the value of the
2949 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2950 a menu-bar or tool-bar, respectively. If the alist entries are added,
2951 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2953 *** The menu bar bindings's caches are not used any more.
2954 Use (where-is-internal <def> nil t) instead.
2956 ** Regions created by mouse dragging are now normal active regions,
2957 similar to those created by shift-selection (see Selection changes
2958 above). In previous Emacs versions, these regions were delineated by
2959 `mouse-drag-overlay'; that variable has been removed.
2961 ** The fourth argument of `filter-buffer-substring' has been removed.
2962 If you want to remove text properties from the final result, simply
2963 pass the result through substring-no-properties.
2965 ** cl.el no longer provides `cl-19'.
2967 ** The following obsolete functions and aliases have been removed
2968 (the appropriate new function is given in parentheses; "not needed"
2969 means you can just remove all calls to the function in question):
2971 *** `comint-kill-output' (`comint-delete-output')
2972 *** `decompose-composite-char' (`char-to-string')
2973 *** `outline-visible' (`outline-invisible-p')
2974 *** `internal-find-face' (`facep')
2975 *** `internal-get-face' (`facep and check-face')
2976 *** `frame-update-faces' (not needed)
2977 *** `frame-update-face-colors' (`frame-set-background-mode')
2978 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2979 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2980 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2981 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2982 *** `x-make-font-unbold' (`make-face-unbold')
2983 *** `x-make-font-unitalic' (`make-face-unitalic')
2984 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2985 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2986 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2987 *** `char-bytes' (== 1)
2988 *** `isearch-return-char' (`isearch-printing-char')
2989 *** `make-local-hook' (not needed)
2990 *** `set-screen-height' (`set-frame-height')
2991 *** `set-screen-width' (`set-frame-width')
2993 ** The following obsolete variables and varaliases have been removed
2994 (the appropriate new variable is given in parentheses):
2996 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2997 *** `vc-header-alist' (`vc-BACKEND-header')
2998 *** `directory-sep-char' (== ?/)
2999 *** `font-lock-defaults-alist' (`font-lock-defaults')
3000 *** `e' (`float-e').
3002 ** The following obsolete files were removed:
3003 sc.el, x-menu.el, rnews.el, rnewspost.el
3005 ** The format of the finder-inf.el file has changed, since the Finder
3006 mechanism is now based on the package system. The variable
3007 `finder-package-info' is replaced by `package--builtins' and
3008 `finder-keywords-hash'.
3010 ** When generating autoloads, `update-directory-autoloads' no longer
3011 assumes every inspected file is in your `load-path'. It instead
3012 generates relative names according to the current `load-path'.
3015 * Lisp Changes in Emacs 24.1
3017 ** Code can now use lexical scoping by default instead of dynamic scoping.
3018 The `lexical-binding' variable enables lexical scoping for local
3019 variables. It is typically set via a file-local variable in the first
3020 line of the file, in which case it applies to all the code in that
3023 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3024 binding instead of the old dynamic binding mode.
3026 *** Lexically scoped interpreted functions are represented with a new form
3027 of function value which looks like (closure ENV ARGS &rest BODY).
3029 *** New macro `letrec' to define recursive local functions.
3031 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3032 So do `defcustom' and other forms that call `defvar' as a subroutine.
3034 *** New function `special-variable-p' to check whether a variable is
3035 declared as dynamically bound.
3037 *** The form ((lambda ...) ...) is deprecated.
3039 ** An Emacs Lisp testing tool is now included.
3040 Emacs Lisp developers can use this tool to write automated tests for
3041 their code. See the ERT info manual for details.
3043 ** Changes for bidirectional display and editing
3045 *** New function `current-bidi-paragraph-direction'.
3046 This returns the base direction of the paragraph at point.
3048 *** New function `bidi-string-mark-left-to-right'.
3049 Given a string containing characters from right-to-left scripts, this
3050 function returns another string which can be safely inserted into a
3051 buffer, such that any following text will be always displayed to the
3052 right of that string. (This works by appending an invisible Unicode
3053 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3055 This is useful when the buffer has overall left-to-right paragraph
3056 direction and you need to insert a string whose contents are not known
3057 in advance, without disrupting the layout of the line.
3061 *** Window tree functions are accessible in Elisp.
3062 Functions are provided to return the parent, siblings or child windows
3063 of any window including internal windows (windows not associated with a
3064 buffer) in the window tree.
3066 **** New function `window-valid-p' gives non-nil for live and internal
3069 **** Window manipulation can deal with internal windows.
3070 Many window handling functions like `split-window', `delete-window', or
3071 `delete-other-windows' as well as the window resizing functions can now
3072 act on any window including internal ones.
3074 *** window-total-height/-width vs window-body-height/-width.
3075 The function `window-height' has been renamed to `window-total-height'
3076 and `window-width' has been renamed to `window-body-width'. The old
3077 names are provided as aliases. Two new functions `window-total-width'
3078 and `window-body-height' are provided.
3080 *** Window parameters specific to window handling functions.
3081 For each window you can specify a parameter to override the default
3082 behavior of a number of functions like `split-window', `delete-window'
3083 and `delete-other-windows'. The variable `ignore-window-parameters'
3084 allows to ignore processing such parameters.
3086 *** New semantics of third argument of `split-window'.
3087 The third argument of `split-window' has been renamed to SIDE and can be
3088 set to any of the values 'below, 'right, 'above, or 'left to make the
3089 new window appear on the corresponding side of the window that shall be
3090 split. Any other value of SIDE will cause `split-window' to split the
3091 window into two side-by-side windows as before.
3093 *** Window resizing functions.
3094 A new standard function for resizing windows called `window-resize' has
3095 been introduced. This and all other functions for resizing windows no
3096 longer delete any windows when they become too small.
3098 *** Deleting the selected window now selects the most recently selected
3099 live window on that frame instead.
3101 *** `adjust-window-trailing-edge' adjustments.
3102 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3103 is able to resize other windows if a window adjacent to the trailing
3104 edge cannot be shrunk any more. This makes its behavior more similar to
3105 that of Emacs 21 without compromising, however, its inability to delete
3106 windows which was introduced in Emacs 22.
3108 *** Window-local buffer lists.
3109 Windows now have local buffer lists. This means that removing a buffer
3110 from display in a window will preferably show the buffer previously
3111 shown in that window with its previous window-start and window-point
3112 positions. This also means that the same buffer may be automatically
3113 shown twice even if it already appears in another window.
3115 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3116 which if non-nil requires the buffer to be displayed in the currently
3117 selected window, signaling an error otherwise. If nil, another window
3118 can be used, e.g. if the selected one is strongly dedicated.
3120 *** `split-window-vertically' and `split-window-horizontally' renamed
3121 to `split-window-below' and `split-window-right' respectively.
3122 The old names are kept as aliases.
3126 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3127 named ACTION, and takes a display action of the same form as
3128 `display-buffer-base-action' (see Changes, above). A non-nil,
3129 non-list value is treated specially, as the old meaning.
3131 **** New variable `display-buffer-overriding-action'.
3133 **** The procedure of `display-buffer' etc. to choose a window is
3134 determined by combining `display-buffer-overriding-action',
3135 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3136 and `display-buffer-fallback-action'. The second and fourth of these
3137 are user-customizable variables.
3139 See the docstring of `display-buffer' for details.
3141 *** New functions `window-state-get' and `window-state-put'.
3142 These functions allow to save and restore the state of an arbitrary
3143 frame or window as an Elisp object.
3147 *** New variable `completion-extra-properties' used to specify extra
3148 properties of the current completion:
3149 - :annotate-function, same as the old completion-annotate-function.
3150 - :exit-function, function to call after completion took place.
3152 *** Functions on `completion-at-point-functions' can return any of the
3153 properties valid for `completion-extra-properties'.
3155 *** `completion-annotate-function' is obsolete.
3157 *** New `metadata' method for completion tables. The metadata thus returned
3158 can specify various details of the data returned by `all-completions':
3159 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3160 used to select a style in completion-category-overrides.
3161 - `annotation-function' to add annotations in *Completions*.
3162 - `display-sort-function' to specify how to sort entries in *Completions*.
3163 - `cycle-sort-function' to specify how to sort entries when cycling.
3165 *** `minibuffer-local-filename-must-match-map' is not used any more.
3166 Instead, the bindings in `minibuffer-local-filename-completion-map'
3167 are combined with `minibuffer-local-must-match-map'.
3169 *** New variable `completing-read-function' allows overriding the
3170 behavior of `completing-read'.
3172 ** `glyphless-char-display' can now distinguish between graphical and
3173 text terminal display, via a char-table entry that is a cons cell.
3175 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3176 Instead, the offending function is removed.
3180 *** New function `run-hook-wrapped' for running an abnormal hook by
3181 passing the hook functions as arguments to a "wrapping" function.
3182 Like `run-hook-with-args-until-success', it stops at the first
3183 non-nil return value.
3185 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3186 set of "wrapping" filters, similar to around advice.
3187 (A version of this macro was actually added in Emacs 23.2 but was not
3188 advertised at the time.)
3192 *** New macro `condition-case-unless-debug' (this was actually added in
3193 Emacs 23.1 as condition-case-no-debug, but not advertised)
3195 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3197 *** Variable `stack-trace-on-error' removed.
3199 *** The debugger can now "continue" from an error, which means it will
3200 jump to the error handler as if the debugger had not been invoked
3201 instead of jumping all the way to the top-level.
3203 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3204 This can be useful when `inhibit-quit' is set.
3206 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3207 named Emacs server instances.
3209 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3210 to redirect STDOUT to a file.
3212 ** The function `format-time-string' now supports the %N directive,
3213 for higher-resolution time stamps.
3215 ** New input reading functions
3217 *** New function `read-char-choice' reads a restricted set of
3218 characters, discarding any inputs not inside the set.
3220 *** The command `read-color' now requires a match for a color name
3221 or RGB triplet, instead of signaling an error if the user provides
3224 **** `facemenu-read-color' is now an alias for `read-color'.
3226 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3227 The variable is now used to load all kind of supported dynamic libraries,
3228 not just image libraries. The previous name is still available as an
3231 ** Syntax parsing changes
3233 *** New variable `syntax-propertize-function'.
3234 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3235 This allows syntax-table properties to be set independently from font-lock:
3236 just call syntax-propertize to make sure the text is propertized.
3237 Together with this new variable come a new hook
3238 syntax-propertize-extend-region-functions, as well as two helper functions:
3239 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3240 as-is; and syntax-propertize-rules which provides a new way to specify
3243 *** Syntax tables support a new "comment style c" additionally to style b.
3245 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3247 ** frame-local variables cannot be let-bound any more.
3249 ** Major and minor mode changes
3251 *** `set-auto-mode' now respects mode: local variables at the end of files,
3252 as well as those in the -*- line.
3254 *** `prog-mode' is a new major mode from which programming modes
3257 **** `prog-mode-hook' can be used to enable features for programming
3258 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3259 on-the-fly spell checking for comments and strings.
3261 **** New minor modes `prettify-symbols-mode' and
3262 `global-prettify-symbols-mode' let the user enable symbol
3263 prettification (replacing a string like "lambda" with the Greek lambda
3266 *** New hook `change-major-mode-after-body-hook', run by
3267 `run-mode-hooks' just before any other mode hooks.
3269 *** Enabled globalized minor modes can be disabled in specific major modes.
3270 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3271 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3273 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3275 ** File-handling changes
3277 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3278 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3279 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3280 argument is supplied (see Trash changes, above).
3282 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3284 ** Tool-bars can display separators.
3285 Tool-bar separators are handled like menu separators in menu-bar maps,
3286 i.e. via menu entries of the form `(menu-item "--")'.
3290 *** Animated images support (currently animated gifs only).
3292 **** `image-animated-p' returns non-nil if an image can be animated.
3294 **** `image-animate' animates a supplied image spec.
3296 **** `image-animate-timer' returns the timer object for an image that
3299 *** `image-extension-data' has been renamed to `image-metadata'.
3300 The old name is an obsolete alias to the new one.
3302 *** Image mode can view any image type that ImageMagick supports.
3303 This requires Emacs to be built with ImageMagick support.
3305 **** New function `imagemagick-types', defined if ImageMagick support
3306 is enabled, returns a list of image file extensions that your
3307 ImageMagick installation supports.
3309 **** New function `imagemagick-register-types' enables ImageMagick
3310 image types in Image mode and in `create-image' and other helper
3313 **** New option `imagemagick-types-inhibit' excludes certain
3314 ImageMagick image types from `imagemagick-register-types'.
3316 **** With ImageMagick support, there are extra Image mode commands to
3317 resize and rotate images: `image-transform-fit-to-height',
3318 `image-transform-fit-to-width', `image-transform-set-rotation', and
3319 `image-transform-set-scale'.
3321 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3322 passes it to the mail user agent function. This argument specifies an
3323 action for returning to the caller after finishing with the mail. For
3324 example, this is used by Rmail to optionally delete a mail window.
3326 ** XML and HTML parsing
3327 If Emacs is compiled with libxml2 support, there are two new
3328 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3329 and `libxml-parse-xml-region' (which parses XML). Both return an
3330 Emacs Lisp parse tree.
3332 ** Networking and encryption changes
3334 *** `open-network-stream' can now be used to open an encrypted stream.
3335 It now accepts an optional `:type' parameter for initiating a TLS
3336 connection, directly or via STARTTLS. To do STARTTLS, additional
3337 parameters (`:end-of-command', `:success', `:capabilities-command')
3338 must also be supplied.
3340 *** New library gnutls.el.
3341 The new function `gnutls-available-p' returns non-nil if Emacs is
3342 built with GnuTLS support. The main entry points are
3343 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3344 these functions through `open-network-stream', because that can
3345 upgrade connections through STARTTLS opportunistically or use plain
3346 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3349 *** New primitive `secure-hash' that supports many secure hash algorithms:
3350 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3351 sha1.el has been removed. The `sha1' feature is provided by default.
3355 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3357 ** Progress reporters can now "spin".
3358 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3359 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3360 time you call `progress-reporter-update' on that progress reporter,
3361 with a nil or omitted VALUE argument, the reporter message is
3362 displayed with a "spinning bar".
3364 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3365 being reverted, even if the buffer has a local `revert-buffer-function'.
3367 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3368 If delayed-warnings-list is non-nil, the command loop calls
3369 `delayed-warnings-hook' after `post-command-hook'. At present, this
3370 is only used by Emacs on some platforms to display warnings during
3371 startup, which might otherwise not be noticed. This uses the
3372 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3374 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3376 ** New function `make-composed-keymap' that constructs a new keymap
3377 from multiple input maps. You can use this to make a keymap that
3378 inherits from multiple maps, eg:
3379 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3381 ** New function `string-prefix-p'.
3382 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3384 ** New reader macro ## that stands for the empty symbol.
3385 This means that the empty symbol can now be read back. Also, #: by itself
3386 (when not immediately followed by a possible symbol character) stands for
3387 an empty uninterned symbol.
3389 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3391 ** The following functions and variables are obsolete:
3393 *** `tooltip-use-echo-area' is obsolete.
3394 Rather than setting this to t, disable Tooltip mode instead.
3396 *** buffer-substring-filters is obsolete.
3397 Use `filter-buffer-substring-functions' instead.
3399 *** `byte-compile-disable-print-circle' is obsolete.
3401 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3402 Use `post-command-hook' instead.
3404 *** `font-lock-maximum-size' is obsolete.
3407 * Changes in Emacs 24.1 on Non-Free Operating Systems
3409 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3410 and also when HOME is set to C:\ by default.
3412 ** New configure.bat options
3414 *** --enable-checking builds Emacs with extra runtime checks.
3416 *** --distfiles specifies files to be included in binary distribution.
3418 *** --without-gnutls disables automatic GnuTLS detection.
3420 *** --lib for general library linkage, works with the USER_LIBS build variable.
3422 ** New make target `dist' to create binary distribution for MS Windows.
3424 ** The Lisp function `w32-default-color-map' is now obsolete.
3425 (It is only used internally in the Emacs C code.)
3427 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3428 reappear on mouse-over. (Requires OS X 10.6 or later.)
3430 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3431 other platforms, rather than inserting its contents into the buffer.
3434 ----------------------------------------------------------------------
3435 This file is part of GNU Emacs.
3437 GNU Emacs is free software: you can redistribute it and/or modify
3438 it under the terms of the GNU General Public License as published by
3439 the Free Software Foundation, either version 3 of the License, or
3440 (at your option) any later version.
3442 GNU Emacs is distributed in the hope that it will be useful,
3443 but WITHOUT ANY WARRANTY; without even the implied warranty of
3444 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3445 GNU General Public License for more details.
3447 You should have received a copy of the GNU General Public License
3448 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3453 paragraph-separate: "[
\f]*$"