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 * Changes in Emacs 24.4
68 ** Key ? also describes prefix bindings like C-h.
71 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
72 because it affects caching of paragraph scanning results as well.
75 ** `apropos-variable' is now `apropos-user-option'
76 `apropos-user-option' shows all user options while `apropos-variable'
77 shows all variables. When called with a universal prefix argument,
78 the two commands swap their behaviors. When `apropos-do-all' is
79 non-nil, they output the same results.
82 ** `eval-defun' on an already defined defcustom calls the :set function,
85 ** If the new variable `enable-dir-local-variables' is nil,
86 directory local variables are ignored. May be useful for some modes
87 that want to ignore directory-locals while still respecting file-locals.
89 ** The option `set-mark-default-inactive' has been deleted.
90 This unfinished feature was introduced by accident in Emacs 23.1;
91 simply disabling Transient Mark mode does the same thing.
93 ** `initial-buffer-choice' can now specify a function to set up the
96 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
97 and read-only. Code that might create the *Messages* buffer should
98 call the function `messages-buffer' to do so and set the mode.
100 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
101 You may think of it as a *scratch* buffer whose content is preserved.
102 In fact, it was designed as a replacement for *scratch* buffer and can
103 be used that way by setting `initial-buffer-choice' to `remember-notes'
104 and `remember-notes-buffer-name' to "*scratch*". Without the second
105 change, *scratch* buffer will still be there for notes that do not
106 need to be preserved.
108 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
110 ** ACL support has been added.
112 *** Emacs preserves the ACL entries of files when backing up.
114 *** New functions `file-acl' and `set-file-acl' get and set the ACL
115 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
116 libacl. On MS-Windows, the NT Security APIs are used to emulate the
117 POSIX ACL interfaces.
119 ** New option `scroll-bar-adjust-thumb-portion'.
120 Available only on X, this option allows to control over-scrolling
121 using the scroll bar (i.e. dragging the thumb down even when the end
122 of the buffer is visible).
124 ** New function `add-face-text-property' has been added, which can be
125 used to conveniently prepend/append new face attributes to text.
127 ** In compiled Lisp files, the header no longer includes a timestamp.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as just they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** New macro `alternatives-define' can be used to define generic commands.
144 Generic commands are interactive functions whose implementation can be
145 selected among several alternatives, as a matter of user preference.
147 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
148 You can change the default by customizing the variable blink-cursor-blinks.
149 Also timers for blinking are stopped when no blinking is done, so Emacs does
150 not consume CPU cycles.
152 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
153 `frame-configuration-to-register'. It offers similar functionality, plus
154 some enhancements, like the ability to restore deleted frames. Command
155 `frame-configuration-to-register' is still available, but unbound.
157 ** The command `quail-help' is deleted. Use `C-h C-\'
158 (`describe-input-method') instead.
160 ** The default value of `comment-use-global-state' is changed to t,
161 and this variable has been marked obsolete.
164 * Editing Changes in Emacs 24.4
166 ** `split-window' is no longer a command, just a non-interactive function.
167 As a command it was a special case of `split-window-below', and as such
168 superfluous. After being reimplemented in Lisp, its interactive form
169 was mistakenly retained.
171 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
172 bound to <f11> and M-<f10>, respectively.
174 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
178 ** New option `visual-order-cursor-movement'.
179 If this is non-nil, cursor motion with arrow keys will follow the
180 visual order of characters on the screen: <left> always moves to the
181 left, <right> always moves to the right, disregarding the surrounding
182 bidirectional context.
184 ** New command `kmacro-to-register' to store keyboard macros in registers.
188 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
189 You can pick the name of the function and the variables with `C-x 4 a'.
192 * Changes in Specialized Modes and Packages in Emacs 24.4
194 ** The debugger's `e' command evaluates the code in the context at point.
195 This includes using the lexical environment at point, which means that
196 `e' now lets you access lexical variables as well.
198 ** `eshell' now supports visual subcommands and options
199 Eshell has been able to handle "visual" commands (interactive,
200 non-line oriented commands such as top that require display
201 capabilities not provided by eshell) by running them in an Emacs
202 terminal emulator. See `eshell-visual-commands'.
204 This feature has been extended to subcommands and options that make a
205 usually line-oriented command a visual command. Typical examples are
206 "git log" and "git <command> --help" which display their output in a
207 pager by default. See `eshell-visual-subcommands' and
208 `eshell-visual-options'.
210 ** If your Emacs is compiled with libxml2 support, you can use the new
211 built-in web browser `eww'.
213 ** `remember' can now store notes in separates files
214 You can use the new function `remember-store-in-files' within the
215 `remember-handler-functions' option.
217 See `remember-data-directory' and `remember-directory-file-name-format'
218 for new options related to this function.
220 * More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
222 ~/.emacs.d/timelog replaces ~/.timelog
223 ~/.emacs.d/vip replaces ~/.vip
224 ~/.emacs.d/viper replaces ~/.viper
225 ~/.emacs.d/ido.last replaces ~/.ido.last
226 ~/.emacs.d/kkcrc replaces ~/.kkcrc
227 ~/.emacs.d/quickurls replaces ~/.quickurls
228 ~/.emacs.d/idlwave replaces ~/.idlwave
229 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
230 ~/.emacs.d/places replaces ~/.emacs-places
231 ~/.emacs.d/shadows replaces ~/.shadows
232 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
233 ~/.emacs.d/strokes replaces ~/.strokes
234 ~/.emacs.d/notes replaces ~/.notes
235 ~/.emacs.d/type-break replaces ~/.type-break
236 Also the following files used by the now obsolete otodo-mode.el:
237 ~/.emacs.d/todo-do replaces ~/.todo-do
238 ~/.emacs.d/todo-done replaces ~/.todo-done
239 ~/.emacs.d/todo-top replaces ~/.todo-top
242 ** Delphi mode is now called OPascal mode.
243 *** All delphi-* variables and functions have been renamed to opascal-*.
244 *** `delphi-newline-always-indents' is not supported any more.
245 Use `electric-indent-mode' instead.
246 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
248 ** Eldoc Mode works properly in the minibuffer.
250 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
252 ** completing-read-multiple's separator can now be a regexp.
253 The default separator is changed to allow surrounding spaces around the comma.
257 *** Battery information via the BSD `apm' utility is now supported.
261 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
263 ** Calendar and Diary
265 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
266 `calendar-month-header'.
268 *** New option `calendar-day-header-array'.
270 *** The variable `calendar-font-lock-keywords' is obsolete.
273 *** New variable `diary-from-outlook-function', used by the command
274 `diary-from-outlook'.
276 ** VC and related modes
278 *** In VC directory mode, `D' displays diffs between VC-controlled
279 whole tree revisions.
281 *** In VC directory mode, `L' lists the change log for the current VC
282 controlled tree in a window.
284 *** In VC directory mode, `I' shows a log of changes that will be
285 received with a pull operation.
287 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
288 under current version control system. When called with a prefix
289 argument, you can remove a file from the ignored file list.
291 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
292 because it is moved to vc-cvs.el.
296 *** New macro cl-tagbody.
299 *** letf is now just an alias for cl-letf.
303 *** Calc by default now uses the Gregorian calendar for all dates, and
304 uses January 1, 1 AD as its day number 1. Previously Calc used the
305 Julian calendar for dates before September 14, 1752, and it used
306 December 31, 1 BC as its day number 1; the new scheme is more
307 consistent with Calendar's calendrical system and day numbering.
309 *** The new variable `calc-gregorian-switch' lets you configure the
310 date when Calc switches from the Julian to the Gregorian calendar.
311 Nil, the default value, means to always use the Gregorian calendar.
312 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
315 *** Support for ISO 8601 dates.
319 *** `desktop-auto-save-timeout' defines the number of seconds between
320 auto-saves of the desktop.
322 *** `desktop-restore-frames', enabled by default, allows saving and
323 restoring the frame/window configuration (frameset). Additional options
324 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
325 and `desktop-restore-forces-onscreen' offer further customization.
329 *** New minor mode `dired-hide-details-mode' hides details.
333 *** New option `erc-accidental-paste-threshold-seconds'.
334 If set to a number, this can be used to avoid accidentally paste large
335 amounts of data into the ERC input.
339 *** New option `epa-mail-aliases'.
341 You can set this to a list of alias expansions for keys to use
342 in `epa-mail-encrypt'.
344 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
345 that means: when one of the recipients of the message being encrypted
346 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
348 If one element of the variable's value is ("foo@bar.com"),
349 that means: when one of the recipients of the message being encrypted
350 is `foo@bar.com', ignore that name as regards encryption.
351 This is useful to avoid a query when you have no key for that name.
354 ** New F90 mode option `f90-smart-end-names'.
356 ** Icomplete is a bit more like Ido.
357 *** key bindings to navigate through and select the completions.
358 *** The icomplete-separator is customizable, and its default has changed.
359 *** Removed icomplete-show-key-bindings.
360 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
361 (setq icomplete-with-completion-tables '(internal-complete-buffer))
362 will revert to the old behavior.
366 *** Ido has a manual now.
367 *** `ido-use-virtual-buffers' takes a new value 'auto.
368 *** `ido-decorations' has been slightly extended to give a bit more control.
372 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
373 visit the next image file and the previous image file in the same
374 directory, respectively.
376 *** New commands to show specific frames of multi-frame images.
377 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
378 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
380 *** New commands to speed up, slow down, or reverse animation.
383 *** The command `image-mode-fit-frame' deletes other windows.
384 When toggling, it restores the frame's previous window configuration.
385 It also has an optional frame argument, which can be used by Lisp
386 callers to fit the image to a frame other than the selected frame.
390 *** New face `info-index-match' is used to highlight matches in index
391 entries displayed by `Info-index-next', `Info-virtual-index' and
396 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
397 will cycle through faces in `hi-lock-face-defaults' without prompting.
400 *** New global command `M-s h .' (`highlight-symbol-at-point')
401 highlights the symbol found near point without prompting,
402 using the next face automatically.
404 ** Search and Replace
406 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
407 starts a symbol (identifier) incremental search forward with the
408 symbol found near point added to the search string initially.
410 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
411 and adds it to the search string.
413 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
414 between nil and the value of the option `search-invisible' (or `open'
417 *** `query-replace' skips invisible text when `search-invisible' is nil,
418 and opens overlays with hidden text when `search-invisible' is `open'.
421 *** By default, prefix arguments do not now terminate Isearch mode.
422 Set `isearch-allow-prefix' to nil to restore old behavior.
424 *** More Isearch commands accept prefix arguments, namely
425 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
428 *** Word search now matches whitespace at the beginning/end
429 of the search string if it contains leading/trailing whitespace.
430 In an incremental word search or when using a non-nil LAX argument
431 of `word-search-regexp', the lax matching can also match part of
432 the first word (in addition to the lax matching of the last word).
433 The same rules are now applied to the symbol search with the difference
434 that it matches symbols, and non-symbol characters between symbols.
436 ** MH-E has been updated to MH-E version 8.5.
437 See MH-E-NEWS for details.
440 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
441 Customize `unrmail-mbox-format' to change this.
444 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
445 of how Rmail displays non-MIME messages.
448 ** New function `ses-rename-cell' to give SES cells arbitrary names.
450 ** trace-function was largely rewritten.
451 New features include:
452 - no prompting for the destination buffer, unless a prefix-arg was used.
453 - additionally to prompting for a destination buffer, when a prefix-arg is
454 used, the user can enter a "context", i.e. Lisp expression whose value at the
455 time the function is entered/exited will be printed along with the function
456 name and arguments. Useful to trace the value of (current-buffer) or
457 (point) when the function is invoked.
459 ** New command `delete-duplicate-lines' has new types of operation:
460 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
461 it works like the utility `uniq'. Otherwise by default it deletes
462 duplicate lines everywhere in the region without regard to adjacency.
463 When its arg KEEP-BLANKS is non-nil (when called interactively with
464 C-u C-u C-u), duplicate blank lines are preserved.
466 ** New `cycle-spacing' command allows cycling between having just one
467 space, no spaces, or reverting to the original spacing. Like
468 `just-one-space' command it can handle or ignore newlines and
469 leave different number of spaces.
471 ** Todo mode has been rewritten and enhanced.
472 New features include:
473 - support for multiple todo files and archive files of done items;
474 - renaming, reordering, moving, merging, and deleting categories;
475 - sortable tabular summaries of categories and the types of items they contain;
476 - cross-category lists of items filtered by specific criteria;
477 - more fine-grained interaction with the Emacs diary, by being able to decide
478 for each todo item whether it appears in the Fancy Diary display;
479 - highly flexible new item insertion and item editing;
480 - moving items between categories, storing done items in their category or in
481 archive files, undoing or unarchiving done items;
482 - reprioritizing items by inputting a numerical priority;
483 - extensive customizability of operation and display, including numerous faces.
484 The Todo mode user manual describes all commands and most user options.
485 To support some of these features, a new file format is used, which is
486 incompatible with the old format; however, you can convert old todo and done
487 item files to the new format on initializing the first new todo file, or at any
488 later time with the provided conversion command. The old version of
489 todo-mode.el has been made obsolete and renamed otodo-mode.el.
493 *** The experimental url syntax for remote file names is withdrawn.
496 *** New connection method "adb", which allows to access Android
497 devices by the Android Debug Bridge. The variable `tramp-adb-program'
498 can be used to adapt the path of the "adb" program, if needed.
500 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
501 "scpc" and "rsyncc" are discontinued. The ssh option
502 "ControlMaster=auto" is set automatically in all ssh-based methods,
506 *** Handlers for `file-acl' and `set-file-acl' for remote machines
507 which support POSIX ACLs.
510 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
511 for remote machines which support filesystem notifications.
515 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
517 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
521 *** The commands `woman-default-faces' and `woman-monochrome-faces'
522 are obsolete. Customize the `woman-*' faces instead.
526 *** Added Eshell-Tramp module
527 External su and sudo commands are now the default; the internal,
528 Tramp-using variants can still be used by enabling the eshell-tramp
531 ** New term.el option `term-suppress-hard-newline'.
533 ** Obsolete packages:
535 *** longlines.el is obsolete; use visual-line-mode instead.
540 *** terminal.el is obsolete; use term.el instead.
542 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
547 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
550 *** The Info-edit command is obsolete. Editing Info nodes by hand
551 has not been relevant for some time.
555 *** `explicit-bash-args' now always defaults to use --noediting.
556 During initialization, Emacs no longer expends a process to decide
557 whether it is safe to use Bash's --noediting option. These days
558 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
561 * New Modes and Packages in Emacs 24.4
563 ** New `superword-mode' in subword.el
564 `superword-mode' overrides the default word motion commands to treat
565 symbol_words as a single word, similar to what `subword-mode' does and
566 using the same internal functions.
568 ** New nadvice.el package offering lighter-weight advice facilities.
570 - add-function/remove-function which can be used to add/remove code on any
571 function-carrying place, such as process-filters or `<foo>-function' hooks.
572 - advice-add/advice-remove to add/remove a piece of advice on a named function,
573 much like `defadvice' does.
575 ** New frameset.el package.
576 It provides a set of operations to save a frameset (the state of all
577 or a subset of the existing frames and windows, somewhat similar to a
578 frame configuration), both in-session and persistently, and restore it
579 at some point in the future.
582 ** The package filenotify.el provides an interface for file system
583 notifications. It requires, that Emacs is compiled with one of the
584 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
587 * Incompatible Lisp Changes in Emacs 24.4
589 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
591 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
592 Some languages match those as »...« and others as «...» so better stay neutral.
594 ** The default file coding for Emacs Lisp files is now utf-8.
595 (See file-coding-system-alist.) In most cases, this change is transparent, but
596 files that contain unusual characters without specifying an explicit coding
597 system may fail to load with obscure errors.
598 You should either convert them to utf-8 or add an explicit `coding:' cookie.
600 ** overriding-terminal-local-map does not replace the local keymaps any more.
601 It used to disable the minor mode, major mode, and text-property keymaps,
602 whereas now it simply has higher precedence.
604 ** Default process filters and sentinels are not nil any more.
605 Instead they default to a function which does what the nil value used to do.
607 ** `read-event' does not return decoded chars in ttys any more.
608 Just as was the case in Emacs-22 and before, decoding of tty input according to
609 keyboard-coding-system is not performed in read-event any more. But contrary
610 to that past, it is still done before input-decode-map/function-key-map/...
612 ** Removed inhibit-local-menu-bar-menus.
614 ** frame-local variables that affect redisplay do not work any more.
615 More specifically, the redisplay does not bother to check for a frame-local
616 value when looking up variables.
618 ** nil and "unbound" are indistinguishable in symbol-function.
619 `symbol-function' never signals `void-function' any more.
620 `fboundp' returns non-nil if the symbol was `fset' to nil.
622 ** `defadvice' does not honor the `freeze' flag and cannot advise
623 special-forms any more.
625 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
626 VAR was bound to nil which was not tremendously useful and just lead to
627 spurious warnings about an unused var.
629 ** The return value of `backup-buffer' has changed.
630 The second argument is no longer an SELinux context, instead it is an
631 alist of extended attributes as returned by the new function
632 `file-extended-attributes'. The attributes can be applied to another
633 file using `set-file-extended-attributes'.
635 ** `visited-file-modtime' now returns -1 for nonexistent files.
636 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
637 in the presence of files with negative time stamps.
639 ** The cars of the elements in `interpreter-mode-alist' are now treated
640 as regexps rather than literal strings. Technically this is an
641 incompatible change, but unless you are using interpreter-mode-alist
642 for something (not just adding elements to it), it ought not to affect you.
645 * Lisp Changes in Emacs 24.4
647 ** New bool-vector set operation functions:
648 *** `bool-vector-exclusive-or'
649 *** `bool-vector-union'
650 *** `bool-vector-intersection'
651 *** `bool-vector-set-difference'
652 *** `bool-vector-not'
653 *** `bool-vector-subsetp'
654 *** `bool-vector-count-matches'
655 *** `bool-vector-count-matches-at'
657 ** Comparison functions =, <, >, <=, >= now take many arguments.
659 ** The second argument of `eval' can now be a lexical-environment.
661 ** `with-demoted-errors' takes an additional argument `format'.
663 ** New function `define-error'.
665 ** New hook `tty-setup-hook'.
668 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
670 ** Obsoleted functions:
673 *** `lisp-complete-symbol'
675 *** `minibuffer-completion-contents'
676 *** `isearch-nonincremental-exit-minibuffer'
677 *** `isearch-filter-visible'
678 *** `generic-make-keywords-list'
680 ** `with-wrapper-hook' is obsoleted by `add-function'.
681 The few hooks that used with-wrapper-hook are replaced as follows:
682 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
683 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
684 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
686 ** `split-string' now takes an optional argument TRIM.
687 The value, if non-nil, is a regexp that specifies what to trim from
688 the start and end of each substring.
690 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
692 ** Support for filesystem notifications.
693 Emacs now supports notifications of filesystem changes, such as
694 creation, modification, and deletion of files. This requires the
695 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
696 MS-Windows systems, this is supported for Windows XP and newer
699 ** Changes in autorevert.el
702 *** If Emacs is compiled with file notification support, notifications
703 are used instead of checking the time stamp of the files. You can
704 disable this by setting the user option `auto-revert-use-notify' to
705 nil. Alternatively, a regular expression of directories to be
706 excluded from file notifications can be specified by
707 `auto-revert-notify-exclude-dir-regexp'.
710 *** The new user option `auto-revert-remote-files' enables reversion
711 of remote files when set to non-nil.
715 *** The function `face-spec-set' is now analogous to `setq' for face specs.
716 Its third arg now accepts values specifying exactly which face spec to
717 set (defface, custom, or user spec), and it directly sets the relevant
718 property using the supplied face spec.
720 *** Face specs set via Custom themes now replace the `defface' spec
721 rather than inheriting from it (as do face specs set via Customize).
723 *** New face characteristic (supports :underline (:style wave))
724 specifies whether or not the terminal can display a wavy line.
729 *** `image-animated-p' is now `image-multi-frame-p'.
730 It returns non-nil for any image that contains multiple frames,
731 whether or not it specifies a frame delay.
734 *** When animating images that do not specify a frame delay,
735 Emacs uses `image-default-frame-delay'.
738 *** New functions `image-current-frame' and `image-show-frame' for getting
739 and setting the current frame of a multi-frame image.
741 *** You can change the speed of animated images.
743 ** Changes in encoding and decoding of text
746 *** New coding-system `prefer-utf-8'.
747 This is like `undecided' but prefers UTF-8 on decoding if the text to
748 be decoded does not contain any invalid UTF-8 sequences. On encoding,
749 any non-ASCII characters are automatically encoded as UTF-8.
752 *** New attributes of coding-systems whose type is `undecided'.
753 Two new attributes, `:inhibit-null-byte-detection' and
754 `:inhibit-iso-escape-detection', determine how to detect encoding of
755 text that includes null bytes and ISO-2022 escape sequences,
756 respectively. Each of these attributes can be either nil, zero, or
757 t. If it is t, decoding text ignores null bytes and, respectively,
758 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
759 with no-conversion and ISO-2022 sequences cause Emacs to assume the
760 text is encoded in one of the ISO-2022 encodings, such as
761 iso-2022-7bit. If the value is zero, Emacs consults the variables
762 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
764 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
765 UTF-8 encoding and decoding, whenever possible.
767 These attributes are only meaningful for coding-systems of type
768 `undecided'. (The type of a coding-system is determined by its
769 `:coding-type' attribute and can be accessed by calling the
770 `coding-system-type' function.)
772 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
773 with the same interpretation as the returned value of `visited-file-modtime'.
775 ** time-to-seconds is not obsolete any more.
776 ** New functions special-form-p and macrop.
777 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
778 text-property on the first char.
780 ** The `defalias-fset-function' property lets you catch calls to defalias
781 and redirect them to your own function instead of `fset'.
783 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
784 When you edit DIR/FILE, Emacs normally creates a symbolic link
785 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
786 is being edited. Formerly, if there was already a non-symlink file
787 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
788 through DIR/.#FILE.9. These fallbacks have been removed, so that
789 Emacs now no longer locks DIR/FILE in that case.
791 On file systems that do not support symbolic links, the lock is now a
792 regular file with contents being what would have been in the symlink.
794 ** The 9th element returned by `file-attributes' is now unspecified.
795 Formerly, it was t if the file's gid would change if file were deleted
796 and recreated. This value has been inaccurate for years on many
797 platforms, and nobody seems to have noticed or cared.
799 ** The function `file-ownership-preserved-p' now has an optional
800 argument GROUP which causes it check for file group too. This can be
801 used in place of the 9th element of `file-attributes'.
803 ** New functions `group-gid' and `group-real-gid'.
805 ** The 6th argument to `copy-file' has been renamed to
806 `preserve-extended-attributes' as it now handles both SELinux context
809 ** The `common-substring' argument of display-completion-list is obsolete.
810 Either use `completion-all-completions' which already returns highlighted
811 strings (including for partial or substring completion) or call
812 `completion-hilit-commonality' to add the highlight.
814 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
816 *** The package descriptor and name of global variables, constants,
817 and functions should be separated by two hyphens if the symbol is not
818 meant to be used by other packages.
821 * Changes in Emacs 24.4 on Non-Free Operating Systems
823 ** The procedure for building Emacs on MS-Windows has changed.
824 It is now built by running the same configure script as on all other
825 platforms. This requires the MSYS environment and MinGW development
826 tools. See the updated instructions in nt/INSTALL for details.
828 Using the Posix configure script and Makefile's also means a change in
829 the directory structure of the Emacs installation on Windows. It is
830 now the same as on GNU and Unix systems. In particular, the auxiliary
831 programs, such as cmdproxy.exe and hexl.exe, are in
832 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
833 version), version-independent site-lisp is in share/emacs/site-lisp,
834 version-specific Lisp files are in share/emacs/VERSION/lisp and in
835 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
836 files are in share/emacs/VERSION/etc. (Emacs knows about all these
837 directories and will find the files in there automatically; there's no
838 need to set any variables due to this change.)
841 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
842 The backtrace is written to the 'emacs_backtrace.txt' file in the
843 directory where Emacs was running.
846 ** The variable `buffer-file-type' is no longer supported.
847 Setting it has no effect, and %t in the mode-line format is ignored.
848 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
849 modifying it has no effect.
852 ** Lock files now work on MS-Windows.
853 This allows to avoid losing your edits if the same file is being
854 edited in another Emacs session or by another user. See the node
855 "Interlocking" in the Emacs User Manual for the details. To disable
856 file locking, customize `create-lockfiles' to nil.
858 ** Improved fullscreen support on Mac OS X.
859 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
860 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
861 native is the default.
864 * Installation Changes in Emacs 24.3
866 ** The default X toolkit is now Gtk+ version 3.
867 If you don't pass `--with-x-toolkit' to configure, or if you use
868 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
869 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
870 You can explicitly require a specific version by passing
871 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
873 ** New configure option `--enable-link-time-optimization', to utilize
874 an appropriate feature provided by GCC since version 4.5.0.
876 ** New configure option `--without-all' to disable most of the optional
877 features (image support, etc.) that are normally enabled by default.
879 ** New configure option `--enable-gcc-warnings' (for developing/debugging
880 Emacs). If building with GCC, this enables compile-time checks that
881 warn/give errors about possibly-questionable C code. On a recent GNU
882 system there should be no warnings; on older and on non-GNU systems
883 the results may be useful to developers.
885 ** The configure option `--enable-use-lisp-union-type' has been
886 renamed to `--enable-check-lisp-object-type', as the resulting
887 Lisp_Object type no longer uses a union to implement the compile time
888 check that this option enables.
890 ** The configure option `--disable-maintainer-mode' has been removed,
891 as it was confusingly-named and rarely useful.
893 ** The configure options `--program-prefix', `--program-suffix', and
894 `--program-transform-name' apply to more than just the installed
895 binaries. Now they also affect the man pages, icons, and the
896 etc/emacs.desktop file; but not the info pages, since this would break
897 links between the various manuals.
899 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
900 overwriting "emacs" in the installation bin/ directory with a link
903 ** Emacs uses libtinfo in preference to libncurses, if available.
905 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
906 /usr/pkg/lib to the linker search path. You must add them yourself if
909 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
910 (from the bin and libexec directories, respectively). The former is
911 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
914 * Startup Changes in Emacs 24.3
916 ** Emacs no longer searches for `leim-list.el' files beneath the standard
917 lisp/ directory. There should not be any there anyway. If you have
918 been adding them there, put them somewhere else; e.g., site-lisp.
920 ** The `--no-site-lisp' command line option now works for Nextstep builds.
923 * Changes in Emacs 24.3
927 *** `C-h f' (`describe-function') can now perform autoloading.
928 When this command is called for an autoloaded function whose docstring
929 contains a key substitution construct, that function's library is
930 automatically loaded, so that the documentation can be shown
931 correctly. To disable this, set `help-enable-auto-load' to nil.
933 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
934 even after their associated libraries have been loaded (and the
935 autoloads have been redefined as functions).
939 *** Images displayed via ImageMagick now support transparency and the
940 :background image specification property.
942 *** When available, ImageMagick support is automatically enabled.
943 It is no longer necessary to call `imagemagick-register-types'
944 explicitly to install ImageMagick image types; that function is called
945 automatically at startup, or when customizing an imagemagick- option.
947 *** Setting `imagemagick-types-inhibit' to t now disables the use of
948 ImageMagick to view images. (You must call `imagemagick-register-types'
949 afterwards if you do not use customize to change this.)
951 *** The new variable `imagemagick-enabled-types' also affects which
952 ImageMagick types are treated as images. The function
953 `imagemagick-filter-types' returns the list of types that will be
956 *** ImageMagick images now support the :max-width and :max-height
959 *** Some data types aren't auto-detected by ImageMagick. Adding
960 :format to `create-image' may help if the content type is in the
961 new variable `image-format-suffixes'.
965 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
966 next and previous path separator, respectively.
968 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
969 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
970 non-nil before enabling the mode.
974 *** New option `mode-line-default-help-echo' specifies the help text
975 (shown in a tooltip or in the echo area) for any part of the mode line
976 that does not have its own specialized help text.
978 *** You can now click mouse-3 in the coding system indicator to invoke
979 `set-buffer-file-coding-system'.
983 *** emacsclient now obeys string values for `initial-buffer-choice',
984 if it is told to open a new frame without specifying any file to visit
985 or expression to evaluate.
987 *** New option `server-auth-key' specifies a shared server key.
989 ** Emacs now generates backtraces on fatal errors.
990 On encountering a fatal error, Emacs now outputs a textual description
991 of the fatal signal, and a short backtrace on platforms like glibc
992 that support backtraces.
994 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
995 This minor mode replaces `toggle-read-only', which is now obsolete.
997 ** Most `y-or-n' prompts now allow you to scroll the selected window.
998 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
999 respectively, without exiting from the prompt.
1001 ** In the Package Menu, newly-available packages are listed as "new",
1002 and sorted above the other "available" packages by default.
1004 ** If your Emacs was built from a bzr checkout, the new variable
1005 `emacs-bzr-version' contains information about the bzr revision used.
1007 ** New option `create-lockfiles' specifies usage of lockfiles.
1008 It defaults to t. Changing it to nil inhibits the creation of lock
1009 files (use this with caution).
1011 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1012 variables on remote hosts.
1014 ** The entry for PCL-CVS has been removed from the Tools menu.
1015 The PCL-CVS commands are still available via the keyboard.
1017 ** Using "unibyte: t" in Lisp source files is obsolete.
1018 Use "coding: raw-text" instead.
1020 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1021 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1022 The previous binding, introduced in Emacs 24.1, was a mistake, because
1023 `C-c LETTER' bindings are reserved for user customizations.
1025 ** Internationalization
1027 *** New language environment: Persian.
1029 *** New input method `vietnamese-vni'.
1031 ** Nextstep (GNUstep / Mac OS X) port
1033 *** Support for fullscreen and the frame parameter fullscreen.
1035 *** A file dialog is used for open/save operations initiated from the
1039 * Editing Changes in Emacs 24.3
1041 ** Search and Replace
1043 *** Non-regexp Isearch now performs "lax" space matching.
1044 Each sequence of spaces in the supplied search string may match any
1045 sequence of one or more whitespace characters, as specified by the
1046 variable `search-whitespace-regexp'. (This variable is also used by a
1047 similar existing feature for regexp Isearch.)
1049 *** New Isearch command `M-s SPC' toggles lax space matching.
1050 This applies to both ordinary and regexp Isearch.
1052 *** New option `replace-lax-whitespace'.
1053 If non-nil, `query-replace' uses flexible whitespace matching too.
1056 *** Global `M-s _' starts a symbol (identifier) incremental search,
1057 and `M-s _' in Isearch toggles symbol search mode.
1058 `M-s c' in Isearch toggles search case-sensitivity.
1060 ** Navigation commands
1062 *** New binding `M-g c' for `goto-char'.
1064 *** New binding `M-g TAB' for `move-to-column'.
1066 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1067 interactively with no prefix arg. Previously, it moved to column 1.
1069 ** New option `yank-handled-properties' allows processing of text
1070 properties on yanked text, in ways that are more general than just
1071 removing them (as is done by `yank-excluded-properties').
1073 ** New option `delete-trailing-lines' specifies whether
1074 M-x delete-trailing-whitespace should delete trailing lines at the end
1075 of the buffer. It defaults to t.
1077 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1079 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1080 `ucs-insert' is now an obsolete alias for `insert-char'.
1082 ** The `z' key no longer has a binding in most special modes.
1083 It used to be bound to `kill-this-buffer', but `z' is too easy to
1086 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1087 It copies the region-rectangle as the last rectangle kill.
1091 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1093 *** New option `register-separator' specifies the register containing
1094 the text to put between collected texts for use with
1095 M-x append-to-register and M-x prepend-to-register.
1098 * Changes in Specialized Modes and Packages in Emacs 24.3
1100 ** Common Lisp emulation (CL)
1102 *** CL's main entry is now (require 'cl-lib).
1103 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1104 i.e., all its definitions have the "cl-" prefix (and internal definitions
1105 use the "cl--" prefix).
1107 If `cl' provided a feature under the name `foo', then `cl-lib'
1108 provides it under the name `cl-foo' instead; with the exceptions of the
1109 few `cl' definitions that had to use `foo*' to avoid conflicts with
1110 pre-existing Elisp entities. These have been renamed to `cl-foo'
1111 rather than `cl-foo*'.
1113 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1114 provide the old, non-prefixed names. Some exceptions are listed below:
1116 *** `cl-flet' is not like `flet' (which is deprecated).
1117 Instead it obeys the behavior of Common-Lisp's `flet'.
1118 In particular, in cl-flet function definitions are lexically scoped,
1119 whereas in flet the scoping is dynamic.
1121 *** `cl-labels' is slightly different from `labels'.
1122 The difference is that it relies on the `lexical-binding' machinery
1123 (as opposed to the `lexical-let' machinery used previously) to capture
1124 definitions in closures, so such closures will only work if `lexical-binding'
1127 *** `cl-letf' is not exactly like `letf'.
1128 The only difference is in details that relate to some deprecated usage
1129 of `symbol-function' in place forms.
1131 *** `progv' was rewritten to use the `let' machinery.
1132 A side effect is that variables without corresponding values are bound
1133 to nil rather than being made unbound.
1135 *** The following methods of extending `setf' are obsolete
1136 (use features from gv.el instead):
1137 `define-modify-macro' (use `gv-letplace')
1138 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1139 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1140 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1144 *** Changes are now highlighted using the same color scheme as in
1145 modern VCSes. Deletions are displayed in red (new faces
1146 `diff-refine-removed' and `smerge-refined-removed', and new definition
1147 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1148 and `smerge-refined-added', and new definition of `diff-added').
1150 *** The variable `diff-use-changed-face' defines whether to use the
1151 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1152 changes in context diffs.
1154 *** The new command `diff-delete-trailing-whitespace' removes trailing
1155 whitespace introduced by a diff.
1157 ** Ediff now uses the same color scheme as Diff mode.
1161 A new version of python.el, which provides several new features, including:
1162 per-buffer shells, better indentation, Python 3 support, and improved
1163 shell-interaction compatible with iPython (and virtually any other
1166 *** Some user options have been replaced/renamed, including (old -> new):
1167 **** python-indent -> python-indent-offset
1168 **** python-guess-indent -> python-indent-guess-indent-offset
1169 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1170 **** python-use-skeletons -> python-skeleton-autoinsert
1172 *** Some user options have been removed, including:
1174 **** `python-indent-string-contents': Strings are never indented.
1176 **** `python-honour-comment-indentation':
1177 Comments are always considered as indentation markers.
1179 **** `python-continuation-offset': Indentation is automatically
1180 calculated in a pep8 compliant way depending on the context.
1182 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1183 Have no direct mapping as the shell interaction is completely different.
1185 **** `python-python-command', `python-jython-command':
1186 Replaced by `python-shell-interpreter'.
1188 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1189 `python-pdbtrack-minor-mode-string', `python-source-modes':
1192 *** Some commands have been replaced (old -> new):
1193 **** python-insert-class -> python-skeleton-class
1194 **** python-insert-def -> python-skeleton-def
1195 **** python-insert-for -> python-skeleton-for
1196 **** python-insert-if -> python-skeleton-if
1197 **** python-insert-try/except -> python-skeleton-try
1198 **** python-insert-try/finally -> python-skeleton-try
1199 **** python-insert-while -> python-skeleton-while
1200 **** python-find-function -> python-nav-jump-to-defun
1201 **** python-next-statement -> python-nav-forward-sentence
1202 **** python-previous-statement -> python-nav-backward-sentence
1203 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1204 **** python-end-of-defun-function -> python-nav-end-of-defun
1205 **** python-send-buffer -> python-shell-send-buffer
1206 **** python-send-defun -> python-shell-send-defun
1207 **** python-send-region -> python-shell-send-region
1208 **** python-send-region-and-go -> emulate with python-shell-send-region
1209 and python-shell-switch-to-shell
1210 **** python-send-string -> python-shell-send-string
1211 **** python-switch-to-python -> python-shell-switch-to-shell
1212 **** python-describe-symbol -> python-eldoc-at-point
1216 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1218 *** The D-Bus object manager interface is implemented.
1220 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1221 if their value does not fit into Emacs's integer range.
1223 *** The function `dbus-call-method' is now non-blocking.
1224 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1226 *** Signals can also be sent as unicast messages.
1228 *** The argument list of `dbus-register-signal' has been extended,
1229 according to the new match rule types of D-Bus.
1231 *** `dbus-init-bus' supports private connections.
1233 *** There is a new function `dbus-setenv'.
1235 ** `desktop-path' no longer includes the "." directory.
1236 Desktop files are now located in ~/.emacs.d by default.
1240 *** `dired-do-async-shell-command' executes each file sequentially
1241 if the command ends in `;' (when operating on multiple files).
1242 Otherwise, it executes the command on each file in parallel.
1244 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1245 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1248 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1249 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1250 mark/unmark/flag all files in the active region.
1252 *** The minibuffer default for `=' (`dired-diff') has changed.
1253 It is now the backup file for the file at point, if one exists.
1254 In Transient Mark mode the default is the file at the active mark.
1256 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1257 The global binding for `M-=', `count-words-region' is in effect.
1261 *** New module "notifications", which can send a notification when you
1262 receive a private message or your nickname is mentioned.
1264 *** ERC will look up server/channel names via auth-source and use any
1267 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1268 only applies to messages sent by lurkers.
1270 ** reStructuredText mode
1272 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1273 fontification, comment handling, and customization have all been revised
1276 *** Support for `imenu' and `which-function-mode'.
1278 *** The reStructuredText syntax is more closely covered.
1279 Sphinx support has been improved.
1281 *** `rst-insert-list' inserts new list or continues existing lists.
1283 *** A negative prefix argument always works for `rst-adjust'.
1285 *** The window configuration is reset after displaying a TOC.
1287 *** The constant `rst-version' describes the rst.el package version.
1291 *** Support for percent literals and recognition of regular expressions
1292 in method calls without parentheses with more methods, including Cucumber
1295 *** Improved syntax highlighting and indentation.
1297 *** New command `ruby-toggle-block', bound to `C-c {'.
1299 *** Some non-standard keybindings/commands have been removed:
1301 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1303 **** `ruby-mark-defun'; use `mark-defun'.
1305 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1306 appropriate settings for the variables `beginning-of-defun-function'
1307 and `end-of-defun-function'.
1309 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1310 `reindent-then-newline-and-indent' and `newline' have been removed.
1312 ** Shell Script mode
1314 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1316 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1318 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1322 *** The free software compiler GHDL is supported (and now the default).
1324 *** Support for the VHDL-AMS packages has been added/updated.
1326 *** Updated to the 2002 revision of the VHDL standard.
1328 *** Accepts \r and \f as whitespace.
1332 *** The faces used by Apropos are now directly customizable.
1333 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1334 see the `apropos' Custom group for details.
1336 *** The old options whose values specified faces to use have been removed
1337 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1341 *** This package has been rewritten to use Tabulated List mode.
1343 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1344 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1348 *** Algebraic simplification mode is now the default.
1349 To restrict to the limited simplifications given by the former
1350 default simplification mode, use `m I'.
1354 *** You can customize the header text that appears above each calendar month.
1355 See the variable `calendar-month-header'.
1357 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1359 *** The calendars produced by cal-html include holidays.
1360 Customize `cal-html-holidays' to change this.
1364 *** The major modes from the parser generators "Bovine" and "Wisent"
1365 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1366 are in `auto-mode-alist', and the corresponding manuals are included.
1370 **** Menu support for the "Configuration" feature. This allows users to
1371 choose the active configuration (such as debug or install) from the menu.
1373 **** New command `ede-set' to interactively set project-local variables.
1375 **** Support for compiling, debugging, and running in "generic" projects.
1377 **** Autoconf editing support for M4 macros with complex arguments.
1379 **** Compilation support for the "linux" project type.
1381 **** "simple" projects have been removed; use "generic" projects instead.
1385 **** Support for parsing #include statements inside a namespace in C/C++.
1387 **** Improved support for 'extern "C"' declarations in C/C++.
1389 **** The ability to ignore more common special C/C++ preprocessor symbols,
1390 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1391 If available, include cdefs.h as an additional source of preprocessor symbols.
1393 **** Improved C/C++ function pointer parsing.
1395 **** In Python, support for converting imports to include file names.
1397 **** Ability to dynamically determine the Python load path.
1399 **** Support for the Python 'WITH' and 'AT' keywords.
1401 **** Improved tooltip completion.
1405 **** The SRecode manual is now included.
1407 **** Tag generation supports constructor/destructor settings and system
1408 include differentiation.
1410 **** Addition of 'Framework' support: Frameworks are specified when a
1411 particular kind of library (such as Android) is needed in a common language
1414 **** Support for nested templates and let variables override based on priority.
1416 **** Support for merging tables from multiple related modes, such as
1417 default -> c++ -> arduino.
1419 ** Compile has a new option `compilation-always-kill'.
1423 *** `custom-reset-button-menu' now defaults to t.
1425 *** Non-option variables are never matched in `customize-apropos' and
1426 `customize-apropos-options' (i.e., the prefix argument does nothing for
1427 these commands now).
1431 *** The variables `term-default-fg-color' and `term-default-bg-color'
1432 are now deprecated in favor of the customizable face `term'.
1434 *** You can customize how to display ANSI terminal colors and styles
1435 by customizing the corresponding `term-color-<COLOR>',
1436 `term-color-underline' and `term-color-bold' faces.
1440 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1442 *** Remote processes are now also supported on remote MS-Windows hosts.
1446 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1447 Previously, this slot stored semicolon-separated attribute-value pairs
1448 appended to some imap URLs, but this is not compatible with RFC 3986.
1449 So now the `filename' slot stores the entire path and query components,
1450 and the `attributes' slot is always nil.
1452 *** New function `url-encode-url' for encoding a URI string.
1453 The `url-retrieve' function now uses this to encode its URL argument,
1454 in case that is not properly encoded.
1456 *** New command `url-cookie-list' displays all the current cookies, and
1457 allows deleting selected cookies.
1459 ** notifications.el supports now version 1.2 of the Notifications API.
1460 The function `notifications-get-capabilities' returns the supported
1463 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1464 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1465 `flymake-warning-bitmap'.
1467 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1468 specifying URL types that should be converted to remote file names at
1469 the FFAP prompt. The default is now '("ftp").
1471 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1472 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1474 ** New option `mouse-avoidance-banish-position' specifies where the
1475 `banish' mouse avoidance setting moves the mouse.
1477 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1478 closing brackets to be aligned with the line of the opening bracket.
1480 ** In Proced mode, new command `proced-renice' renices marked processes.
1482 ** New option `async-shell-command-buffer' specifies the buffer to use
1483 for a new asynchronous `shell-command' when the default output buffer
1484 `*Async Shell Command*' is already in use.
1486 ** SQL mode has a new option `sql-db2-escape-newlines'.
1487 If non-nil, newlines sent to the command interpreter will be escaped
1488 by a backslash. The default does not escape the newlines and assumes
1489 that the sql statement will be terminated by a semicolon.
1491 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1492 (and modes that derive from it), sorts the column at point, or the Nth
1493 column if a numeric prefix argument is given.
1495 ** `which-func-modes' now defaults to t, so Which Function mode, when
1496 enabled, applies to all applicable major modes.
1498 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1501 ** Follow mode no longer works by using advice.
1502 The option `follow-intercept-processes' has been removed.
1504 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1506 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1507 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1508 *** semantic-change-hooks -> semantic-change-functions
1509 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1510 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1511 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1512 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1513 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1514 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1515 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1516 *** rcirc-activity-hooks -> rcirc-activity-functions
1517 *** rcirc-print-hooks -> rcirc-print-functions
1518 *** dbus-event-error-hooks -> dbus-event-error-functions
1519 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1520 *** checkdoc-style-hooks -> checkdoc-style-functions
1521 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1522 *** archive-extract-hooks -> archive-extract-hook
1523 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1524 *** hfy-post-html-hooks -> hfy-post-html-hook
1525 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1526 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1527 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1528 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1530 ** Obsolete packages
1533 In most cases, assoc+member+push+delq work just as well.
1534 And in any case it's just a terrible package: ugly semantics, terrible
1535 inefficiency, and not namespace-clean.
1544 * Incompatible Lisp Changes in Emacs 24.3
1546 ** Docstrings starting with `*' no longer indicate user options.
1547 Only variables defined using `defcustom' are considered user options.
1548 The function `user-variable-p' is now an obsolete alias for
1549 `custom-variable-p'.
1551 ** The return values of `defalias', `defun' and `defmacro' have changed,
1552 and are now undefined. For backwards compatibility, `defun' and
1553 `defmacro' currently return the name of the newly defined
1554 function/macro, but this should not be relied upon.
1556 ** `random' by default now returns a different random sequence in
1557 every Emacs run. Use `(random S)', where S is a string, to set the
1558 random seed to a value based on S, in order to get a repeatable
1559 sequence in later calls.
1561 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1562 that substring is inserted literally even if the LITERAL arg is
1563 non-nil, instead of causing an error to be signaled.
1565 ** `select-window' now always makes the window's buffer current.
1566 It does so even if the window was selected before.
1568 ** The function `x-select-font' can return a font spec, instead of a
1569 font name as a string. Whether it returns a font spec or a font name
1570 depends on the graphical library.
1572 ** `face-spec-set' no longer sets frame-specific attributes when the
1573 third argument is a frame (that usage was obsolete since Emacs 22.2).
1575 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1577 ** The CL package's `get-setf-method' function no longer exists.
1578 Generalized variables are now part of core Emacs Lisp, and implemented
1579 differently to the way cl.el used to do it. It is not possible to
1580 define a compatible replacement for `get-setf-method'. See the file
1581 gv.el for internal details of the new implementation.
1583 ** The arguments of `dbus-register-signal' are no longer just strings,
1584 but keywords or keyword-string pairs. The old argument list will
1585 still be supported for Emacs 24.x.
1587 ** Miscellaneous name changes
1588 Some Lisp symbols have been renamed to correct their spelling,
1589 or to be more consistent with standard Emacs terminology.
1591 *** Renamed functions
1592 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1593 **** inactivate-input-method -> deactivate-input-method
1594 **** quail-inactivate -> quail-deactivate
1595 **** robin-inactivate -> robin-deactivate
1596 **** viper-inactivate-input-method -> viper-deactivate-input-method
1597 **** viper-inactivate-input-method-action ->
1598 viper-deactivate-input-method-action
1599 **** ucs-input-inactivate -> ucs-input-deactivate
1602 The old hooks are still supported for backward compatibility, but they
1603 are deprecated and will be removed eventually.
1604 **** input-method-inactivate-hook -> input-method-deactivate-hook
1605 **** robin-inactivate-hook -> robin-deactivate-hook
1606 **** quail-inactivate-hook -> quail-deactivate-hook
1608 *** Renamed variables
1609 **** follow-deactive-menu -> follow-inactive-menu
1610 **** inactivate-current-input-method-function ->
1611 deactivate-current-input-method-function
1613 ** Some obsolete functions, variables, and faces have been removed:
1614 *** `last-input-char', `last-command-char', `unread-command-char'
1615 *** `facemenu-unlisted-faces'
1616 *** `rmail-decode-mime-charset'
1617 *** `iswitchb-read-buffer'
1618 *** `sc-version', `sc-submit-bug-report'
1619 *** `set-char-table-default'
1620 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1621 *** `compile-internal'
1623 *** `mode-line-inverse-video'
1624 *** `follow-mode-off-hook'
1625 *** `cvs-commit-buffer-require-final-newline'
1626 (use `log-edit-require-final-newline' instead)
1627 *** `cvs-changelog-full-paragraphs'
1628 (use `log-edit-changelog-full-paragraphs' instead)
1629 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1630 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1631 *** `vc-master-templates' (use `vc-handled-backends' instead)
1632 *** `vc-checkout-carefully'
1635 * Lisp Changes in Emacs 24.3
1637 ** CL-style generalized variables are now in core Elisp.
1638 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1639 You can define your own generalized variables using `gv-define-simple-setter',
1640 `gv-define-setter', etc.
1642 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1643 This can significantly speed up execution of non-byte-compiled code,
1644 but can also bump into previously unnoticed cyclic dependencies.
1645 These are generally harmless: they will simply cause the macro calls
1646 to be left for later expansion (as before), but will result in a
1647 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1648 You may wish to restructure your code so this does not happen.
1650 ** New sampling-based Elisp profiler.
1651 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1652 When finished, use M-x profiler-stop. The sampling rate can be based on
1653 CPU time or memory allocations.
1655 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1656 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1658 ** New macros `setq-local' and `defvar-local'.
1660 ** Face underlining can now use a wave.
1662 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1663 of `read-regexp' accepts a string ending with a colon and space, and its
1664 second argument DEFAULTS can be a list of strings accessible via `M-n'
1665 in the minibuffer ahead of other hard-coded useful regexp-related values.
1666 More commands use `read-regexp' now to read their regexp arguments.
1670 *** New function `completion-table-with-quoting' to handle completion
1671 in the presence of quoting, such as file completion in shell buffers.
1673 *** New function `completion-table-subvert' to use an existing completion
1674 table, but with a different prefix.
1678 *** New error type and new function `user-error'.
1679 These do not trigger the debugger.
1681 *** New option `debugger-bury-or-kill', saying what to do with the
1682 debugger buffer when exiting debug.
1684 *** Set `debug-on-message' to enter the debugger when a certain
1685 message is displayed in the echo area. This can be useful when trying
1686 to work out which code is doing something.
1688 *** New var `inhibit-debugger', automatically set to prevent accidental
1689 recursive invocations.
1693 *** New command `fit-frame-to-buffer' adjusts the frame height to
1696 *** The command `fit-window-to-buffer' can adjust the frame height
1697 if the new option `fit-frame-to-buffer' is non-nil.
1699 *** New macro `with-temp-buffer-window', similar to
1700 `with-output-to-temp-buffer'.
1702 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1705 *** New option `switch-to-buffer-preserve-window-point' to restore a
1706 window's point when switching buffers.
1708 *** New display action alist entries `window-height' and `window-width'
1709 specify the size of new windows created by `display-buffer'.
1711 *** New display action alist entry `pop-up-frame-parameters', if
1712 non-nil, specifies frame parameters to give any newly-created frame.
1714 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1715 tells display action functions to avoid changing which frame is
1718 *** New display action alist entry `previous-window', if non-nil,
1719 specifies window to reuse in `display-buffer-in-previous-window'.
1721 *** New display action functions `display-buffer-below-selected',
1722 and `display-buffer-in-previous-window'.
1724 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1725 now accept a third argument to avoid choosing the selected window.
1727 *** Additional values recognized for option `window-combination-limit'.
1729 *** The following variables are obsolete, as they can be replaced by
1730 appropriate entries in the `display-buffer-alist' function introduced
1732 **** `dired-shrink-to-fit'
1733 **** `display-buffer-reuse-frames'
1734 **** `display-buffer-function'
1735 **** `special-display-buffer-names'
1736 **** `special-display-frame-alist'
1737 **** `special-display-function'
1738 **** `special-display-regexps'
1742 *** `current-time-string' no longer requires that its argument's year
1743 must be in the range 1000..9999. It now works with any year supported
1744 by the underlying C implementation.
1746 *** `current-time' now returns extended-format time stamps
1747 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1748 PSEC is typically a multiple of 1000 on current machines. Other
1749 functions that use this format, such as `file-attributes' and
1750 `format-time-string', have been changed accordingly. Old-format time
1751 stamps are still accepted.
1753 *** The format of timers in `timer-list' and `timer-idle-list' is now
1754 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1755 The PSECS slot is new, and uses picosecond resolution. It can be
1756 accessed via the new `timer--psecs' accessor.
1758 *** Last-modified time stamps in undo lists now are of the form
1759 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1763 *** Improved security when handling persistent objects:
1765 **** `eieio-persistent-read' now features optional arguments for specifying
1766 the class to load, as well as a flag stating whether subclasses are allowed;
1767 if provided, other classes will be rejected by the reader. For
1768 compatibility with existing code, if the class is omitted only a
1771 **** New specialized reader for pulling in classes and signaling errors
1772 without evaluation of suspicious code.
1774 **** All slots that contain objects must have a :type. Slots with lists
1775 of objects must use a new type predicate for a list of an object type.
1777 *** Support for `find-function' and similar utilities, through the addition
1778 of filename support to generated symbols.
1780 ** Floating point functions now always return special values like NaN,
1781 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1782 Previously, they returned NaNs on some platforms but signaled errors
1783 on others. The affected functions are acos, asin, tan, exp, expt,
1784 log, log10, sqrt, and mod.
1786 ** New fringe bitmap `exclamation-mark'.
1788 ** Miscellaneous changes to special forms and macros
1790 *** `defun' and `defmacro' are now macros rather than special forms.
1792 *** `kbd' is now a function rather than a macro.
1794 ** Miscellaneous new functions
1796 *** `set-temporary-overlay-map' sets up a temporary keymap that
1797 takes precedence over most other maps for a short while (normally one key).
1799 *** `autoloadp' tests if its argument is an autoloaded object.
1801 *** `autoload-do-load' performs the autoloading operation.
1803 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1805 *** `file-name-base' returns a file name sans directory and extension.
1807 *** `function-get' fetches a function property, following aliases.
1809 *** `posnp' tests if an object is a `posn'.
1811 *** `system-users' returns the user names on the system.
1813 *** `system-groups' returns the group names on the system.
1815 *** `tty-top-frame' returns the topmost frame of a text terminal.
1817 ** The following functions and variables are obsolete:
1818 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1819 *** `buffer-has-markers-at'
1820 *** `macro-declaration-function' (use `macro-declarations-alist')
1821 *** `window-system-version' (provides no useful information)
1822 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1823 *** `query-replace-interactive'
1824 *** `font-list-limit' (has had no effect since Emacs < 23)
1827 * Changes in Emacs 24.3 on Non-Free Operating Systems
1829 ** Cygwin builds can use the native MS Windows user interface.
1830 Pass `--with-w32' to configure. The default remains the X11 interface.
1832 ** Two new functions are available in Cygwin builds:
1833 `cygwin-convert-file-name-from-windows' and
1834 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1835 code to access the Cygwin file-name mapping machinery to convert
1836 between Cygwin and Windows-native file and directory names.
1838 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1839 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1840 `mouse-autoselect-window'.
1842 ** On MS Windows Vista and later Emacs now supports symbolic links.
1844 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1845 support for libxml2, even if its presence is detected.
1847 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1849 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1850 directories to the search path. You must add them yourself if you want them.
1853 * Changes in Emacs 24.2
1855 ** This is mainly a bug-fix release.
1858 * Installation Changes in Emacs 24.1
1860 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1861 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1862 also depend on Gtk+. You can disable them with --without-rsvg and
1865 ** Emacs can be compiled with GnuTLS support.
1866 This happens by default if a suitably recent version of the library is
1867 found at build time. To prevent this, use the configure option
1868 `--without-gnutls'. See below for GnuTLS features.
1870 ** Emacs can be compiled with SELinux support.
1871 This happens by default if a suitably recent version of the library is
1872 found at build time. To prevent this, use the configure option
1873 `--without-selinux'. See below for SELinux features.
1875 ** Emacs can be compiled with ImageMagick support.
1876 This happens by default if a suitably recent version of the library is
1877 found at build time. To prevent this, use the configure option
1878 `--without-imagemagick'. See below for ImageMagick features.
1879 This feature is not available for the Nextstep or MS ports.
1881 ** Emacs can be compiled with libxml2 support.
1882 This happens by default if a suitably recent version of the library is
1883 found at build time. To prevent this, use the configure option
1884 `--without-xml2'. See below for libxml2 features.
1886 ** By default, the installed Info and man pages are compressed.
1887 You can disable this by configuring --without-compress-info.
1889 ** New configure option --with-wide-int.
1890 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1891 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1894 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1895 These provide no new functionality, they just remove the need to edit
1896 lib-src/Makefile by hand in order to use the associated features.
1898 ** New configure option --enable-use-lisp-union-type.
1899 This is only useful for Emacs developers to debug certain types of bugs.
1900 This is not a new feature; only the configure flag is new.
1902 ** The standalone programs digest-doc and sorted-doc are removed.
1903 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1905 ** The standalone program `fakemail' is removed.
1906 If you need it, feedmail.el provides a superset of the functionality.
1909 * Startup Changes in Emacs 24.1
1911 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1912 command line arguments, and the EMACS_UNIBYTE environment variable, no
1913 longer have any effect. (They were declared obsolete in Emacs 23.)
1915 ** New command line option `--no-site-lisp' removes site-lisp directories
1916 from load-path. -Q now implies this. This option does not affect the
1917 EMACSLOADPATH environment variable (and hence has no effect for
1921 * Changes in Emacs 24.1
1925 *** Many packages now use the `completion-at-point' command,
1926 rather than implementing separate completion commands.
1928 *** `completion-at-point' now handles tags and semantic completion.
1930 *** Completion in a non-minibuffer now tries to detect the end of completion
1931 and pops down the *Completions* buffer accordingly.
1933 *** New option `completion-cycle-threshold' allows completion cycling.
1935 *** New option `completion-category-overrides' for overriding the
1936 default completion style in certain circumstances.
1938 *** New completion style `substring'.
1940 *** Completion of buffer names uses `substring' completion by default.
1942 *** The option `widget-complete-field' has been removed.
1946 *** The first time you try sending mail, Emacs asks for a mail method.
1947 This is implemented by a new default for `send-mail-function', which
1948 is `sendmail-query-once'. This offers to use the smtpmail package, or
1949 to use the old defaults relying on external mail facilities
1950 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1951 `mailclient-send-it' on Windows).
1953 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1954 transfers the report to your desktop's preferred mail client, if there
1955 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1958 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1959 and Mail mode changes
1961 ** Emacs server and client changes
1963 *** New option `server-port' specifies the port for TCP Emacs servers.
1965 *** New emacsclient argument -q/--quiet suppresses some status messages.
1967 *** New emacsclient argument --frame-parameters specifies the frame
1968 parameters of any newly-created graphical frame.
1970 *** If emacsclient shuts down due to Emacs signaling an error,
1971 its exit status is 1.
1973 *** New emacsclient argument --parent-id ID.
1974 This opens a client frame in parent X window ID, via XEmbed, similar
1975 to the --parent-id argument to Emacs.
1977 ** Internationalization changes
1979 *** Emacs now supports display and editing of bidirectional text.
1980 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1981 displayed in the correct visual order as expected by users of those
1982 scripts. The display reordering is a "full bidirectionality" class
1983 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1984 with no RTL text should look exactly the same as before.
1986 **** New buffer-local variable `bidi-display-reordering'.
1987 To disable display reordering in a buffer, change this to nil.
1989 **** New buffer-local variable `bidi-paragraph-direction'.
1990 If nil (the default), Emacs determines the base direction of each
1991 paragraph from its text, as specified by the UBA. Setting the value
1992 to `right-to-left' or `left-to-right' forces a base direction on each
1995 Paragraphs with right-to-left base direction are displayed starting at
1996 the right window edge.
1998 *** Enhanced support for characters with no glyphs in available fonts,
1999 or, on text terminals, characters that cannot be encoded by the
2000 terminal coding system. The new option `glyphless-char-display-control'
2001 specifies how to display them: as a hexadecimal code in a box, a thin
2002 1-pixel space, an empty box, etc.
2004 *** New input methods for Farsi and Bulgarian
2005 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2007 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2008 (U+2010 and U+2011).
2010 *** New Hebrew translation of the Emacs Tutorial.
2011 Type `C-u C-h t' to choose it in case your language setup doesn't
2012 automatically select it.
2014 ** An Emacs Lisp package manager is now included.
2015 This is a convenient way to download and install additional packages,
2016 from a package repository at http://elpa.gnu.org.
2018 *** M-x list-packages shows a list of packages, which can be
2019 selected for installation.
2021 *** New command `describe-package', bound to `C-h P'.
2023 *** By default, all installed packages are loaded automatically when
2024 Emacs starts up. To disable this, set `package-enable-at-startup' to
2025 nil. To specify the packages to load, customize `package-load-list'.
2027 ** Custom theme changes
2029 *** New command `M-x customize-themes', which provides a convenient
2030 interface for enabling and disabling Custom themes.
2032 *** New option `custom-theme-load-path' is the load path for themes.
2033 Emacs no longer looks for Custom themes in `load-path'. The default
2034 value of `custom-theme-load-path' says to look for themes in
2035 `custom-theme-directory', followed by a subdirectory of
2036 `data-directory' named "themes/", which contains a small selection of
2037 built-in Custom themes.
2039 *** New option `custom-safe-themes' records known-safe theme files.
2040 If a theme is not in this list, Emacs queries before loading it, and
2041 offers to save the theme to `custom-safe-themes' automatically. By
2042 default, all themes included in Emacs are treated as safe.
2044 ** Improved GTK integration
2046 *** GTK scroll-bars are now placed on the right by default.
2047 The function `set-scroll-bar-mode' can change this.
2049 *** GTK tool bars can have just text, just images or images and text.
2050 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2051 the default is taken from desktop settings.
2053 *** GTK tool bars can be placed on any edge of the frame.
2054 The frame-parameter tool-bar-position controls this. It takes the
2055 values top, left, right or bottom. The Options => Show/Hide menu has
2058 *** The default colors for selected text (the `region' face) are taken
2059 from the GTK theme when Emacs is built with GTK.
2061 *** Emacs uses GTK tooltips by default if built with GTK.
2062 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2064 ** Graphical interface changes
2066 *** On graphical displays, the mode-line no longer ends in dashes.
2067 Also, the first dash (which does not indicate anything) is just
2068 displayed as a space.
2070 *** `menu-bar-select-buffer-function' lets you choose another operation
2071 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2073 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2074 built with Xft. These fonts can be set via X resources, for example:
2075 Emacs.pane.menubar.font: Courier-12
2079 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2080 or if it receives a SIGINT signal in batch mode.
2082 *** `kill-emacs-hook' is now also run in batch mode.
2083 Third-party code which adds to `kill-emacs-hook' should check if they
2084 do the right thing in batch mode.
2086 ** Scrolling changes
2088 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2089 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2090 of buffer at first key-press (instead they move to top/bottom of buffer)
2091 when `scroll-error-top-bottom' is non-nil.
2093 *** New option `scroll-error-top-bottom' (see above).
2095 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2096 scroll a line instead of full screen.
2098 *** New property `scroll-command' should be set on a command's symbol to
2099 define it as a scroll command affected by `scroll-preserve-screen-position'.
2101 *** If you customize `scroll-conservatively' to a value greater than 100,
2102 Emacs will never recenter point in the window when it scrolls due to
2103 cursor motion commands or commands that move point (e.f., `M-g M-g').
2104 Previously, you needed to use `most-positive-fixnum' as the value of
2105 `scroll-conservatively' to achieve the same effect.
2107 *** "Aggressive" scrolling now honors the scroll margins.
2108 If you customize `scroll-up-aggressively' or
2109 `scroll-down-aggressively' and move point off the window, Emacs now
2110 scrolls the window so as to avoid positioning point inside the scroll
2113 ** Basic SELinux support has been added.
2114 This requires Emacs to be linked with libselinux at build time.
2116 *** Emacs preserves the SELinux file context when backing up.
2117 Also, the function `copy-file' has an extra optional argument for
2118 preserving SELinux context, and the return value of `backup-buffer'
2119 now includes the SELinux context.
2121 *** New functions `file-selinux-context' and `set-file-selinux-context'
2122 get and set the SELinux context of a file.
2126 *** `delete-by-moving-to-trash' now only affects commands that specify
2127 trashing. This avoids inadvertently trashing temporary files.
2129 *** Calling `delete-file' or `delete-directory' with a prefix argument
2130 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2132 ** File- and directory-local variable changes
2134 *** You can stop directory local vars from applying to subdirectories.
2135 Add an element (subdirs . nil) to the alist portion of any variables
2136 settings to indicate that the section should not apply to
2139 *** Directory local variables can apply to some file-less buffers.
2140 Affected modes include dired, vc-dir, and log-edit. For example,
2141 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2142 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2143 `hack-dir-local-variables-non-file-buffer' to support this.
2145 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2146 Instead, use "eval: (minor-mode 1)".
2148 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2149 to `inhibit-local-variables-regexps'. As the name suggests, it now
2150 applies to ALL file local variables, not just -*- lines. The
2151 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2156 *** The `quit-window' command now restores the last buffer displayed
2157 in the quitted window.
2159 *** Resizing an Emacs frame now preserves proportional window sizes,
2160 modulo restrictions like window minimum sizes and fixed-size windows.
2162 *** The behavior of `display-buffer' is now customizable in detail.
2164 **** New option `display-buffer-base-action' specifies a list of
2165 user-determined display "actions" (functions and optional arguments
2166 for choosing the displaying window).
2168 This takes precedence over the default display action, which is
2169 specified by `display-buffer-fallback-action'.
2171 **** New option `display-buffer-alist' maps buffer name regexps to
2172 display actions, taking precedence over `display-buffer-base-action'.
2174 *** New option `window-combination-limit'.
2175 The new option `window-combination-limit' allows to return the space
2176 obtained for resizing or creating a window more reliably to the window
2177 from which such space was obtained.
2179 *** New option `window-combination-resize'.
2180 The new option `window-combination-resize' allows to split a window that
2181 otherwise cannot be split because it's too small by stealing space from
2182 other windows in the same combination. Subsequent resizing or deletion
2183 of the window will resize all windows in the same combination as well.
2185 *** New option `frame-auto-hide-function' lets you choose between
2186 iconifying or deleting a frame when burying a buffer in a dedicated
2187 frame, or quitting a window showing a buffer in a frame of its own.
2189 *** New commands `maximize-window' and `minimize-window'.
2190 These maximize and minimize the size of a window within its frame.
2192 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2193 These functions allow to navigate through the live buffers that have
2194 been shown in a specific window.
2196 ** Minibuffer changes
2198 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2199 This is handy for minibuffer-only frames, and is also used for the feature
2200 where mouse-1 pops up *Messages*"', which can now easily be changed.
2202 *** Minibuffers set `truncate-lines' to nil.
2203 If you want to change the value to something else, you could use
2204 for example `minibuffer-setup-hook'.
2206 ** `auto-mode-case-fold' is now enabled by default.
2208 ** `backup-by-copying-when-mismatch' now defaults to t.
2210 ** New basic faces `error', `warning', `success'.
2211 These are used to highlight text indicating failure, caution or
2212 successful operation.
2214 ** New option `list-colors-sort' defines the color sort order
2215 for `list-colors-display'.
2217 ** The variable `focus-follows-mouse' now always defaults to nil.
2220 * Editing Changes in Emacs 24.1
2224 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2225 `isearch-yank-line'.
2227 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2228 `isearch-yank-kill'.
2230 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2232 ** New commands `count-words-region' and `count-words'.
2234 *** M-= is bound to `count-words-region', not `count-lines-region'.
2235 The `count-words-region' command, when called interactively, reports
2236 the number of lines, words, and characters in the region. It is a
2237 superset of the old `count-lines-region', which is now an obsolete
2240 ** The command `just-one-space' (M-SPC), if given a negative argument,
2241 also deletes newlines around point.
2245 *** New option `delete-active-region'.
2246 If non-nil, [delete] and DEL delete the region if it is active and no
2247 prefix argument is given. If set to `kill', those commands kill
2250 *** New command `delete-forward-char', bound to [delete].
2251 This is meant for interactive use, and obeys `delete-active-region'.
2252 The command `delete-char' does not obey `delete-active-region'.
2254 *** `delete-backward-char' is now a Lisp function.
2255 Apart from obeying `delete-active-region', its behavior is unchanged.
2256 However, the byte compiler now warns if it is called from Lisp; Lisp
2257 callers should use delete-char with a negative argument instead.
2259 *** The option `mouse-region-delete-keys' has been deleted.
2261 ** Selection changes.
2263 The default handling of clipboard and primary selections has been
2264 changed to conform with modern X applications. In short, most
2265 commands for killing and yanking text now use the clipboard, while
2266 mouse commands use the primary selection.
2268 In the following, we provide a list of these changes, followed by a
2269 list of steps to get the old behavior back if you prefer that.
2271 *** `select-active-regions' now defaults to t.
2272 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2273 the kill ring. The selected text is put in the primary selection, if
2274 the system possesses a separate primary selection facility (e.g. X).
2276 **** `select-active-regions' also accepts a new value, `only'.
2277 This means to only set the primary selection for temporarily active
2278 regions (usually made by mouse-dragging or shift-selection);
2279 "ordinary" active regions, such as those made with C-SPC followed by
2280 point motion, do not alter the primary selection.
2282 **** `mouse-drag-copy-region' now defaults to nil.
2284 *** mouse-2 is now bound to `mouse-yank-primary'.
2285 This pastes from the primary selection, ignoring the kill-ring.
2286 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2288 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2290 *** `x-select-enable-primary' now defaults to nil.
2291 Thus, commands that kill text or copy it to the kill-ring (such as
2292 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2294 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2295 exactly equivalent to M-w, C-w, and C-y respectively.
2297 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2298 non-nil by default, as Windows does not support the primary selection
2299 between applications.
2301 *** To return to the previous behavior, do the following:
2303 **** Change `select-active-regions' to nil.
2304 **** Change `mouse-drag-copy-region' to t.
2305 **** Change `x-select-enable-primary' to t (on X only).
2306 **** Change `x-select-enable-clipboard' to nil.
2307 **** Bind `mouse-yank-at-click' to mouse-2.
2309 *** Support for X cut buffers has been removed.
2311 *** X clipboard managers are now supported.
2312 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2314 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2315 in the current rectangle. With a prefix argument, this prompts for a
2316 number to count from and for a format string.
2318 ** `redisplay-dont-pause' now defaults to t.
2319 This makes Emacs feel more responsive to editing commands that arrive
2320 at high rate, e.g. if you lean on some key, because stopping redisplay
2321 in the middle (when this variable is nil) forces more expensive
2322 updates later on, and Emacs appears to be unable to keep up.
2324 ** The behavior of <TAB> for active regions in Text mode has changed.
2325 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2326 when the region is active causes Emacs to indent all the lines in the
2327 region, aligning them with the line previous to the first line in the
2328 region (or with the left margin if there is no previous line).
2330 ** When `occur' is called with a prefix argument, matching strings are
2331 collected into the `*Occur*' buffer without line numbers. If there
2332 are parenthesized subexpressions in the specified regexp, `occur'
2333 reads replacement text that may contain \\& and \\N whose convention
2334 follows `replace-match'.
2337 * Changes in Specialized Modes and Packages in Emacs 24.1
2339 ** Archive Mode has basic support for browsing and updating 7z archives.
2343 *** BibTeX mode now supports biblatex.
2344 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2345 `bibtex-entry-field-alist' is now an obsolete alias for
2346 `bibtex-BibTeX-entry-alist'.
2348 *** New command `bibtex-search-entries', bound to C-c C-a.
2350 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2352 *** New variable `bibtex-search-entry-globally'.
2356 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2358 *** The default browser used by the package is now the "xdg-open" program,
2359 on platforms that support it. This calls your desktop's preferred browser.
2363 *** Support for musical notes.
2365 *** Support for logarithmic units.
2367 *** No longer uses the tex prefix for TeX specific unit names when
2368 using TeX or LaTeX mode.
2370 *** New option to highlight selections using faces.
2372 *** `calc-histogram' has the option of using a vector to determine the bins.
2374 *** New "O" option prefix.
2376 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2378 ** Calendar, Diary, and Appt
2380 *** Diary entries can contain non-printing "comments".
2381 See the variable `diary-comment-start'.
2383 *** Appointments can specify their individual warning times.
2384 See the variable `appt-warning-time-regexp'.
2386 *** The function specified by `appt-disp-window-function' may be passed
2387 lists of arguments if multiple appointments are due at similar times.
2388 If you are using a custom function for this, you should update it.
2390 *** New function `diary-hebrew-birthday'.
2392 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2393 may no longer be nil, but must all be strings.
2395 *** The obsolete (since Emacs 22.1) method of enabling the appt
2396 package by adding `appt-make-list' to `diary-hook' has been removed.
2397 Use `appt-activate' instead.
2399 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2400 appt-issue-message (use the function appt-activate)
2401 appt-visible/appt-msg-window (use the variable appt-display-format)
2403 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2404 view-diary-entries, list-diary-entries, show-all-diary-entries
2408 *** New feature to "guess" the style in an existing buffer.
2409 The main entry point is M-x c-guess.
2411 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2413 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2414 Thus C-M-a will, by default, go to the beginning of the immediate function,
2417 *** "Macros with semicolons" can be registered for correct indentation.
2418 Where such a macro ends a line (no semicolon) the next statement is no longer
2419 parsed as a statement continuation.
2421 ** Comint and modes derived from it use the standard completion code.
2425 *** Compilation mode can be used without Font Lock mode.
2426 `compilation-parse-errors-function' is now obsolete.
2428 *** New variable `compilation-filter-start', which is bound while
2429 `compilation-filter-hook' runs. It records the start position of the
2430 text inserted by `compilation-filter'.
2432 *** `compilation-error-screen-columns' and `compilation-first-column'
2433 are obeyed in the editing buffer. So programming language modes can
2434 set them, whereas previously only the value in the *Compilation*
2439 *** Customize buffers now contain a search field.
2440 The search is performed using `customize-apropos'.
2441 To turn off the search field, set `custom-search-field' to nil.
2443 *** Options in customize group buffers start out hidden if not customized.
2444 Use the arrow to the left of the option name to toggle visibility.
2446 *** custom-buffer-sort-alphabetically now defaults to t.
2448 *** The color widget now has a "Choose" button, which allows you to
2449 choose a color via `list-colors-display'.
2453 *** It is now possible to access buses other than the default system
2456 *** The `dbus-register-method' and `dbus-register-property' functions
2457 optionally do not register names.
2459 *** The new function `dbus-register-service' registers a known service
2460 name on a D-Bus without also registering a property or a method.
2464 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2465 if called with a prefix argument, read a file name from the minibuffer
2466 instead of using the current buffer.
2468 *** The "dired local variables" feature of Dired-x is obsolete.
2469 The standard directory local variables feature replaces it.
2473 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2474 controlling attempts to autojoin a channel.
2476 *** New variable `erc-coding-system-precedence': If we use `undecided'
2477 as the server coding system, this variable will then be consulted.
2478 The default is to decode strings that can be decoded as utf-8 as
2479 utf-8, and do the normal `undecided' decoding for the rest.
2483 *** The default value of `eshell-directory-name' has changed
2484 to be an "eshell" directory in `user-emacs-directory'.
2485 The old "~/.eshell/" directory is still used if it exists, though.
2489 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2490 It now supports multithread non-stop debugging and simultaneous
2491 debugging of several threads.
2495 *** RET (`image-toggle-animation') toggles animation, if applicable.
2496 Animation plays once, unless the option `image-animate-loop' is non-nil.
2500 *** New command M-x info-display-manual displays a named Info manual.
2501 If that manual is already visited in some Info buffer, it displays
2502 that buffer. (This is handy if you have many manuals in many *info*
2503 buffers, and don't remember the name of the buffer visiting the manual
2504 you want to consult.) Otherwise, it loads and displays the manual.
2506 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2507 This is for compatibility with the stand-alone Info reader program,
2508 and also because `Info-edit' is a rarely used command that is disabled
2511 ** Mail mode changes (not Message mode)
2513 *** New command M-x mail-add-attachment for adding MIME attachments
2515 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2516 (Its name is misleading, since it has nothing to do with MIME
2517 attachments.) The old name is now an obsolete alias to the new name.
2519 ** MH-E has been updated to MH-E version 8.3.1.
2520 See MH-E-NEWS for details.
2522 ** Modula-2 mode provides auto-indentation.
2524 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2526 ** nXML mode no longer binds C-RET to `nxml-complete'.
2527 Completion is now performed via `completion-at-point', bound to C-M-i
2528 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2529 default), this performs tag completion.
2531 ** Org mode has been updated to version 7.8.09.
2532 See ORG-NEWS for details.
2534 ** Prolog mode has been completely revamped, with lots of additional
2535 functionality such as more intelligent indentation, electricity,
2536 support for more variants, including Mercury, and a lot more.
2540 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2541 in the Rmail incoming message.
2543 *** The variable `rmail-message-filter' no longer has any effect.
2544 This change was made in Emacs 23.1 but was not advertised at the time.
2545 Try using `rmail-show-message-hook' instead.
2549 *** M-x shell prompts for the shell path name if the default directory
2550 is a remote file name and neither the environment variable $ESHELL nor
2551 the variable `explicit-shell-file-name' is set.
2553 *** TAB is now bound to the standard `completion-at-point' command,
2554 which now implements the pcomplete rules for shell command completion.
2558 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2559 if the mail server supports them. This uses either built-in GnuTLS
2560 support, or the starttls.el library. Customize `smtpmail-stream-type'
2563 *** The variable `smtpmail-auth-credentials' has been removed.
2564 By default, the information is now stored in the file ~/.authinfo.
2565 This was the default value of smtpmail-auth-credentials. If you had
2566 customized smtpmail-auth-credentials to a list of user names and
2567 passwords, those settings are not used. During your first connection
2568 to the smtp server, Emacs will prompt for the user name and password,
2569 and offer to save them to ~/.authinfo. Or you can manually copy the
2570 credentials to ~/.authinfo. For example, if you had
2572 (setq smtpmail-auth-credentials
2573 '(("mail.example.org" 25 "jim" "s!cret")))
2575 then the equivalent line in ~/.authinfo would be
2577 machine mail.example.org port 25 login jim password s!cret
2579 See the auth-source manual for more information, e.g. on encrypting
2580 the credentials file.
2582 *** The variable `smtpmail-starttls-credentials' has been removed.
2583 If you had that set, you need to put
2585 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2587 in your ~/.authinfo file instead.
2589 *** SMTPmail defaults to using the address in the From: header as the
2590 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2591 to the address you wish to use instead.
2595 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2596 and `sql-oracle-scan-on'.
2598 *** New options controlling prompting for login parameters.
2599 Each supported product has a custom variable `sql-*-login-params',
2600 which is a list of the parameters to be prompted for before a
2601 connection is established.
2603 *** The command `sql-product-interactive' now takes a prefix argument,
2604 which causes it to prompt for an SQL product.
2606 *** Product-specific SQL interactive commands now take prefix arguments.
2607 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2608 given a prefix argument, prompt for a name for the SQL interactive
2609 buffer. This reduces the need for calling `sql-rename-buffer'.
2611 *** SQL interactive modes suppress command continuation prompts, and
2612 replace tabs with spaces. The first change impacts multiple line SQL
2613 statements entered with C-j between each line, statements yanked into
2614 the buffer and statements sent with `sql-send-*' functions. The
2615 second prevents the MySQL and Postgres interpreters from listing
2616 object name completions when sent text via `sql-send-*' functions.
2618 *** New command `sql-connect' starts a predefined SQLi session,
2619 using the login parameters from `sql-connection-alist'.
2621 *** New "Save Connection" menu item in SQLi buffers.
2622 This gathers the login params specified for the SQLi session, if it
2623 was not started by a connection, and saves them as a new connection.
2625 *** New commands for listing database objects and details:
2626 sql-list-all and sql-list-table.
2628 *** An API for manipulating SQL product definitions has been added.
2632 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2636 *** New inline access method "ksu" (kerberized su).
2638 *** The following access methods are discontinued: "ssh1_old",
2639 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2641 *** The user option `remote-file-name-inhibit-cache' controls whether
2642 remote file attributes are cached for better performance.
2644 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2645 default value to "".
2647 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2648 for remote machines which support SELinux.
2650 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2651 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2652 the degree of parallelism.
2654 ** VC and related modes
2656 *** Support for pulling on distributed version control systems.
2657 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2658 supported (currently with Bzr, Git, and Mercurial), to update the
2659 current branch and working tree. A prefix argument means to prompt
2660 the user for specifics, e.g. a pull location.
2662 *** `vc-update' is now an alias for `vc-pull'.
2664 *** Support for merging on distributed version control systems.
2665 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2666 is supported (currently with Bzr, Git, and Mercurial), to merge
2667 changes from another branch into the current one. It prompts for
2668 specifics, e.g. a merge source.
2670 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2671 shows a diff while querying the user. It defaults to t.
2673 *** Log entries in some Log View buffers can be toggled to display a
2674 longer description by typing RET (log-view-toggle-entry-display).
2675 This is currently supported for Bzr, Git, and Mercurial (to support
2676 another backend, define a `log-view-expanded-log-entry-function').
2677 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2678 use this to display the full log entry for the revision at point.
2680 *** New command `vc-ediff' allows visual comparison of two revisions
2681 of a file similar to `vc-diff', but using ediff backend.
2683 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2684 this was not advertised at the time.
2686 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2687 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2688 this was not advertised at the time.
2694 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2696 *** partial-completion-mode (complete.el) is obsolete.
2697 You can get a comparable behavior with:
2698 (setq completion-styles '(partial-completion initials))
2699 (setq completion-pcm-complete-word-inserts-delimiters t)
2701 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2703 *** pgg is obsolete (use EasyPG instead).
2705 *** sregex.el is obsolete, since rx.el is a strict superset.
2707 *** s-region.el and pc-select.el are obsolete.
2708 They are superseded by shift-select-mode, enabled by default since 23.1.
2710 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2714 *** The Landmark game is now invoked with `landmark', not `lm'.
2715 Its functions and variables have been similarly renamed.
2717 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2718 (This interfered with cua-mode.)
2720 *** f90.el has some support for Fortran 2008 syntax.
2722 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2724 *** New command `nato-region' converts text to NATO phonetic alphabet.
2727 * New Modes and Packages in Emacs 24.1
2729 ** Occur Edit mode applies edits made in *Occur* buffers to the
2730 original buffers. It is bound to "e" in Occur mode.
2732 ** New global minor mode electric-pair-mode.
2733 When enabled, typing an open parenthesis automatically inserts the
2734 matching closing one.
2736 ** New global minor mode electric-indent-mode.
2737 When enabled, typing certain characters triggers reindentation.
2738 Major modes wishing to use this can set electric-indent-chars or
2739 electric-indent-functions.
2741 ** New global minor mode electric-layout-mode.
2742 When enabled, typing certain characters automatically inserts newlines.
2743 Major modes wishing to use this can set electric-layout-rules.
2745 ** tabulated-list.el provides a generic major mode for tabulated data,
2746 from which other modes can be derived.
2748 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2750 ** secrets.el is an implementation of the Secret Service API, an
2751 interface to password managers like GNOME Keyring or KDE Wallet. The
2752 Secret Service API requires D-Bus for communication. The command
2753 `secrets-show-secrets' offers a buffer with a visualization of the
2756 ** notifications.el provides an implementation of the Desktop
2757 Notifications API. It requires D-Bus for communication.
2759 ** soap-client.el supports access to SOAP web services from Emacs.
2760 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2762 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2764 ** New emacs-lock.el package.
2765 The previous version has been moved to obsolete/old-emacs-lock.el.
2766 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2767 against exiting Emacs and killing the buffer can be set separately.
2768 The mechanism for automatically turning off protection for buffers
2769 with dead inferior processes has been generalized.
2772 * Incompatible Lisp Changes in Emacs 24.1
2774 ** Passing a nil argument to a minor mode function call now ENABLES
2775 the minor mode unconditionally. This is so that you can write e.g.
2777 (add-hook 'text-mode-hook 'foo-mode)
2779 to enable foo-mode in Text mode buffers, removing the need for
2780 `turn-on-foo-mode' style functions. This affects all mode commands
2781 defined by `define-minor-mode'. If called interactively, the mode
2782 command still toggles the minor mode.
2784 ** The return value of `backup-buffer' has changed.
2785 It is now a list of three elements, where the second element is a list
2786 describing the original file's SELinux context. If Emacs or the
2787 system lacks SELinux support, the context list is (nil nil nil nil).
2788 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2790 ** `char-direction-table' and the `char-direction' function were deleted.
2791 They were buggy and inferior to the new support of bidirectional
2792 editing introduced in Emacs 24. If you need the bidirectional
2793 properties of a character, use `get-char-code-property' with the last
2794 argument `bidi-class'.
2796 ** `copy-directory' now copies the source directory as a subdirectory
2797 of the target directory, if the latter is an existing directory. The
2798 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2799 the contents directly into a pre-existing target directory.
2801 ** For mouse click input events in the text area, the Y pixel
2802 coordinate in the POSITION list now counts from the top of the text
2803 area, excluding any header line. Previously, it counted from the top
2806 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2807 been further reduced. Now a backquote not followed by a space is
2808 always treated as a "new-style" backquote. Please remove all
2809 "old-style" backquotes from your code. If your code uses backquotes
2810 as documented in the Elisp manual, and compiles without warning, then
2811 you have nothing to do in this regard. Code not following the
2812 appropriate conventions may fail to compile.
2814 The most common cause of trouble seems to be an old-style backquote
2815 followed by a newline. Another cause of trouble is vector notation
2816 for key sequence notation: instead of [(control ,)] and [(control ')],
2817 you should write [(control ?,)] and [(control ?')], which will work in
2820 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2821 was not advertised at the time. The function `custom-initialize-delay'
2822 replaced all known uses.
2824 ** `view-buffer' now treats special mode-class in the same way that
2825 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2826 major mode is special).
2828 ** Menu and tool bar changes
2830 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2831 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2832 With these alist entries omitted, `make-frame' checks the value of the
2833 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2834 a menu-bar or tool-bar, respectively. If the alist entries are added,
2835 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2837 *** The menu bar bindings's caches are not used any more.
2838 Use (where-is-internal <def> nil t) instead.
2840 ** Regions created by mouse dragging are now normal active regions,
2841 similar to those created by shift-selection (see Selection changes
2842 above). In previous Emacs versions, these regions were delineated by
2843 `mouse-drag-overlay'; that variable has been removed.
2845 ** The fourth argument of `filter-buffer-substring' has been removed.
2846 If you want to remove text properties from the final result, simply
2847 pass the result through substring-no-properties.
2849 ** cl.el no longer provides `cl-19'.
2851 ** The following obsolete functions and aliases have been removed
2852 (the appropriate new function is given in parentheses; "not needed"
2853 means you can just remove all calls to the function in question):
2855 *** `comint-kill-output' (`comint-delete-output')
2856 *** `decompose-composite-char' (`char-to-string')
2857 *** `outline-visible' (`outline-invisible-p')
2858 *** `internal-find-face' (`facep')
2859 *** `internal-get-face' (`facep and check-face')
2860 *** `frame-update-faces' (not needed)
2861 *** `frame-update-face-colors' (`frame-set-background-mode')
2862 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2863 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2864 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2865 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2866 *** `x-make-font-unbold' (`make-face-unbold')
2867 *** `x-make-font-unitalic' (`make-face-unitalic')
2868 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2869 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2870 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2871 *** `char-bytes' (== 1)
2872 *** `isearch-return-char' (`isearch-printing-char')
2873 *** `make-local-hook' (not needed)
2874 *** `set-screen-height' (`set-frame-height')
2875 *** `set-screen-width' (`set-frame-width')
2877 ** The following obsolete variables and varaliases have been removed
2878 (the appropriate new variable is given in parentheses):
2880 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2881 *** `vc-header-alist' (`vc-BACKEND-header')
2882 *** `directory-sep-char' (== ?/)
2883 *** `font-lock-defaults-alist' (`font-lock-defaults')
2884 *** `e' (`float-e').
2886 ** The following obsolete files were removed:
2887 sc.el, x-menu.el, rnews.el, rnewspost.el
2889 ** The format of the finder-inf.el file has changed, since the Finder
2890 mechanism is now based on the package system. The variable
2891 `finder-package-info' is replaced by `package--builtins' and
2892 `finder-keywords-hash'.
2894 ** When generating autoloads, `update-directory-autoloads' no longer
2895 assumes every inspected file is in your `load-path'. It instead
2896 generates relative names according to the current `load-path'.
2899 * Lisp Changes in Emacs 24.1
2901 ** Code can now use lexical scoping by default instead of dynamic scoping.
2902 The `lexical-binding' variable enables lexical scoping for local
2903 variables. It is typically set via a file-local variable in the first
2904 line of the file, in which case it applies to all the code in that
2907 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2908 binding instead of the old dynamic binding mode.
2910 *** Lexically scoped interpreted functions are represented with a new form
2911 of function value which looks like (closure ENV ARGS &rest BODY).
2913 *** New macro `letrec' to define recursive local functions.
2915 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2916 So do `defcustom' and other forms that call `defvar' as a subroutine.
2918 *** New function `special-variable-p' to check whether a variable is
2919 declared as dynamically bound.
2921 *** The form ((lambda ...) ...) is deprecated.
2923 ** An Emacs Lisp testing tool is now included.
2924 Emacs Lisp developers can use this tool to write automated tests for
2925 their code. See the ERT info manual for details.
2927 ** Changes for bidirectional display and editing
2929 *** New function `current-bidi-paragraph-direction'.
2930 This returns the base direction of the paragraph at point.
2932 *** New function `bidi-string-mark-left-to-right'.
2933 Given a string containing characters from right-to-left scripts, this
2934 function returns another string which can be safely inserted into a
2935 buffer, such that any following text will be always displayed to the
2936 right of that string. (This works by appending an invisible Unicode
2937 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2939 This is useful when the buffer has overall left-to-right paragraph
2940 direction and you need to insert a string whose contents are not known
2941 in advance, without disrupting the layout of the line.
2945 *** Window tree functions are accessible in Elisp.
2946 Functions are provided to return the parent, siblings or child windows
2947 of any window including internal windows (windows not associated with a
2948 buffer) in the window tree.
2950 **** New function `window-valid-p' gives non-nil for live and internal
2953 **** Window manipulation can deal with internal windows.
2954 Many window handling functions like `split-window', `delete-window', or
2955 `delete-other-windows' as well as the window resizing functions can now
2956 act on any window including internal ones.
2958 *** window-total-height/-width vs window-body-height/-width.
2959 The function `window-height' has been renamed to `window-total-height'
2960 and `window-width' has been renamed to `window-body-width'. The old
2961 names are provided as aliases. Two new functions `window-total-width'
2962 and `window-body-height' are provided.
2964 *** Window parameters specific to window handling functions.
2965 For each window you can specify a parameter to override the default
2966 behavior of a number of functions like `split-window', `delete-window'
2967 and `delete-other-windows'. The variable `ignore-window-parameters'
2968 allows to ignore processing such parameters.
2970 *** New semantics of third argument of `split-window'.
2971 The third argument of `split-window' has been renamed to SIDE and can be
2972 set to any of the values 'below, 'right, 'above, or 'left to make the
2973 new window appear on the corresponding side of the window that shall be
2974 split. Any other value of SIDE will cause `split-window' to split the
2975 window into two side-by-side windows as before.
2977 *** Window resizing functions.
2978 A new standard function for resizing windows called `window-resize' has
2979 been introduced. This and all other functions for resizing windows no
2980 longer delete any windows when they become too small.
2982 *** Deleting the selected window now selects the most recently selected
2983 live window on that frame instead.
2985 *** `adjust-window-trailing-edge' adjustments.
2986 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2987 is able to resize other windows if a window adjacent to the trailing
2988 edge cannot be shrunk any more. This makes its behavior more similar to
2989 that of Emacs 21 without compromising, however, its inability to delete
2990 windows which was introduced in Emacs 22.
2992 *** Window-local buffer lists.
2993 Windows now have local buffer lists. This means that removing a buffer
2994 from display in a window will preferably show the buffer previously
2995 shown in that window with its previous window-start and window-point
2996 positions. This also means that the same buffer may be automatically
2997 shown twice even if it already appears in another window.
2999 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3000 which if non-nil requires the buffer to be displayed in the currently
3001 selected window, signaling an error otherwise. If nil, another window
3002 can be used, e.g. if the selected one is strongly dedicated.
3004 *** `split-window-vertically' and `split-window-horizontally' renamed
3005 to `split-window-below' and `split-window-right' respectively.
3006 The old names are kept as aliases.
3010 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3011 named ACTION, and takes a display action of the same form as
3012 `display-buffer-base-action' (see Changes, above). A non-nil,
3013 non-list value is treated specially, as the old meaning.
3015 **** New variable `display-buffer-overriding-action'.
3017 **** The procedure of `display-buffer' etc. to choose a window is
3018 determined by combining `display-buffer-overriding-action',
3019 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3020 and `display-buffer-fallback-action'. The second and fourth of these
3021 are user-customizable variables.
3023 See the docstring of `display-buffer' for details.
3025 *** New functions `window-state-get' and `window-state-put'.
3026 These functions allow to save and restore the state of an arbitrary
3027 frame or window as an Elisp object.
3031 *** New variable `completion-extra-properties' used to specify extra
3032 properties of the current completion:
3033 - :annotate-function, same as the old completion-annotate-function.
3034 - :exit-function, function to call after completion took place.
3036 *** Functions on `completion-at-point-functions' can return any of the
3037 properties valid for `completion-extra-properties'.
3039 *** `completion-annotate-function' is obsolete.
3041 *** New `metadata' method for completion tables. The metadata thus returned
3042 can specify various details of the data returned by `all-completions':
3043 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3044 used to select a style in completion-category-overrides.
3045 - `annotation-function' to add annotations in *Completions*.
3046 - `display-sort-function' to specify how to sort entries in *Completions*.
3047 - `cycle-sort-function' to specify how to sort entries when cycling.
3049 *** `minibuffer-local-filename-must-match-map' is not used any more.
3050 Instead, the bindings in `minibuffer-local-filename-completion-map'
3051 are combined with `minibuffer-local-must-match-map'.
3053 *** New variable `completing-read-function' allows overriding the
3054 behavior of `completing-read'.
3056 ** `glyphless-char-display' can now distinguish between graphical and
3057 text terminal display, via a char-table entry that is a cons cell.
3059 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3060 Instead, the offending function is removed.
3064 *** New function `run-hook-wrapped' for running an abnormal hook by
3065 passing the hook functions as arguments to a "wrapping" function.
3066 Like `run-hook-with-args-until-success', it stops at the first
3067 non-nil return value.
3069 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3070 set of "wrapping" filters, similar to around advice.
3071 (A version of this macro was actually added in Emacs 23.2 but was not
3072 advertised at the time.)
3076 *** New macro `condition-case-unless-debug' (this was actually added in
3077 Emacs 23.1 as condition-case-no-debug, but not advertised)
3079 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3081 *** Variable `stack-trace-on-error' removed.
3083 *** The debugger can now "continue" from an error, which means it will
3084 jump to the error handler as if the debugger had not been invoked
3085 instead of jumping all the way to the top-level.
3087 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3088 This can be useful when `inhibit-quit' is set.
3090 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3091 named Emacs server instances.
3093 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3094 to redirect STDOUT to a file.
3096 ** The function `format-time-string' now supports the %N directive,
3097 for higher-resolution time stamps.
3099 ** New input reading functions
3101 *** New function `read-char-choice' reads a restricted set of
3102 characters, discarding any inputs not inside the set.
3104 *** The command `read-color' now requires a match for a color name
3105 or RGB triplet, instead of signaling an error if the user provides
3108 **** `facemenu-read-color' is now an alias for `read-color'.
3110 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3111 The variable is now used to load all kind of supported dynamic libraries,
3112 not just image libraries. The previous name is still available as an
3115 ** Syntax parsing changes
3117 *** New variable `syntax-propertize-function'.
3118 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3119 This allows syntax-table properties to be set independently from font-lock:
3120 just call syntax-propertize to make sure the text is propertized.
3121 Together with this new variable come a new hook
3122 syntax-propertize-extend-region-functions, as well as two helper functions:
3123 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3124 as-is; and syntax-propertize-rules which provides a new way to specify
3127 *** Syntax tables support a new "comment style c" additionally to style b.
3129 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3131 ** frame-local variables cannot be let-bound any more.
3133 ** Major and minor mode changes
3135 *** `set-auto-mode' now respects mode: local variables at the end of files,
3136 as well as those in the -*- line.
3138 *** `prog-mode' is a new major mode from which programming modes
3141 **** `prog-mode-hook' can be used to enable features for programming
3142 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3143 on-the-fly spell checking for comments and strings.
3145 **** New minor modes `prettify-symbols-mode' and
3146 `global-prettify-symbols-mode' let the user enable symbol
3147 prettification (replacing a string like "lambda" with the Greek lambda
3150 *** New hook `change-major-mode-after-body-hook', run by
3151 `run-mode-hooks' just before any other mode hooks.
3153 *** Enabled globalized minor modes can be disabled in specific major modes.
3154 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3155 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3157 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3159 ** File-handling changes
3161 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3162 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3163 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3164 argument is supplied (see Trash changes, above).
3166 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3168 ** Tool-bars can display separators.
3169 Tool-bar separators are handled like menu separators in menu-bar maps,
3170 i.e. via menu entries of the form `(menu-item "--")'.
3174 *** Animated images support (currently animated gifs only).
3176 **** `image-animated-p' returns non-nil if an image can be animated.
3178 **** `image-animate' animates a supplied image spec.
3180 **** `image-animate-timer' returns the timer object for an image that
3183 *** `image-extension-data' has been renamed to `image-metadata'.
3184 The old name is an obsolete alias to the new one.
3186 *** Image mode can view any image type that ImageMagick supports.
3187 This requires Emacs to be built with ImageMagick support.
3189 **** New function `imagemagick-types', defined if ImageMagick support
3190 is enabled, returns a list of image file extensions that your
3191 ImageMagick installation supports.
3193 **** New function `imagemagick-register-types' enables ImageMagick
3194 image types in Image mode and in `create-image' and other helper
3197 **** New option `imagemagick-types-inhibit' excludes certain
3198 ImageMagick image types from `imagemagick-register-types'.
3200 **** With ImageMagick support, there are extra Image mode commands to
3201 resize and rotate images: `image-transform-fit-to-height',
3202 `image-transform-fit-to-width', `image-transform-set-rotation', and
3203 `image-transform-set-scale'.
3205 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3206 passes it to the mail user agent function. This argument specifies an
3207 action for returning to the caller after finishing with the mail. For
3208 example, this is used by Rmail to optionally delete a mail window.
3210 ** XML and HTML parsing
3211 If Emacs is compiled with libxml2 support, there are two new
3212 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3213 and `libxml-parse-xml-region' (which parses XML). Both return an
3214 Emacs Lisp parse tree.
3216 ** Networking and encryption changes
3218 *** `open-network-stream' can now be used to open an encrypted stream.
3219 It now accepts an optional `:type' parameter for initiating a TLS
3220 connection, directly or via STARTTLS. To do STARTTLS, additional
3221 parameters (`:end-of-command', `:success', `:capabilities-command')
3222 must also be supplied.
3224 *** New library gnutls.el.
3225 The new function `gnutls-available-p' returns non-nil if Emacs is
3226 built with GnuTLS support. The main entry points are
3227 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3228 these functions through `open-network-stream', because that can
3229 upgrade connections through STARTTLS opportunistically or use plain
3230 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3233 *** New primitive `secure-hash' that supports many secure hash algorithms:
3234 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3235 sha1.el has been removed. The `sha1' feature is provided by default.
3239 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3241 ** Progress reporters can now "spin".
3242 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3243 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3244 time you call `progress-reporter-update' on that progress reporter,
3245 with a nil or omitted VALUE argument, the reporter message is
3246 displayed with a "spinning bar".
3248 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3249 being reverted, even if the buffer has a local `revert-buffer-function'.
3251 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3252 If delayed-warnings-list is non-nil, the command loop calls
3253 `delayed-warnings-hook' after `post-command-hook'. At present, this
3254 is only used by Emacs on some platforms to display warnings during
3255 startup, which might otherwise not be noticed. This uses the
3256 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3258 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3260 ** New function `make-composed-keymap' that constructs a new keymap
3261 from multiple input maps. You can use this to make a keymap that
3262 inherits from multiple maps, eg:
3263 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3265 ** New function `string-prefix-p'.
3266 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3268 ** New reader macro ## that stands for the empty symbol.
3269 This means that the empty symbol can now be read back. Also, #: by itself
3270 (when not immediately followed by a possible symbol character) stands for
3271 an empty uninterned symbol.
3273 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3275 ** The following functions and variables are obsolete:
3277 *** `tooltip-use-echo-area' is obsolete.
3278 Rather than setting this to t, disable Tooltip mode instead.
3280 *** buffer-substring-filters is obsolete.
3281 Use `filter-buffer-substring-functions' instead.
3283 *** `byte-compile-disable-print-circle' is obsolete.
3285 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3286 Use `post-command-hook' instead.
3288 *** `font-lock-maximum-size' is obsolete.
3291 * Changes in Emacs 24.1 on Non-Free Operating Systems
3293 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3294 and also when HOME is set to C:\ by default.
3296 ** New configure.bat options
3298 *** --enable-checking builds Emacs with extra runtime checks.
3300 *** --distfiles specifies files to be included in binary distribution.
3302 *** --without-gnutls disables automatic GnuTLS detection.
3304 *** --lib for general library linkage, works with the USER_LIBS build variable.
3306 ** New make target `dist' to create binary distribution for MS Windows.
3308 ** The Lisp function `w32-default-color-map' is now obsolete.
3309 (It is only used internally in the Emacs C code.)
3311 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3312 reappear on mouse-over. (Requires OS X 10.6 or later.)
3314 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3315 other platforms, rather than inserting its contents into the buffer.
3318 ----------------------------------------------------------------------
3319 This file is part of GNU Emacs.
3321 GNU Emacs is free software: you can redistribute it and/or modify
3322 it under the terms of the GNU General Public License as published by
3323 the Free Software Foundation, either version 3 of the License, or
3324 (at your option) any later version.
3326 GNU Emacs is distributed in the hope that it will be useful,
3327 but WITHOUT ANY WARRANTY; without even the implied warranty of
3328 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3329 GNU General Public License for more details.
3331 You should have received a copy of the GNU General Public License
3332 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3337 paragraph-separate: "[
\f]*$"