1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2012 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 the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.3
26 ** New configure option '--without-all' to disable additional features.
27 This disables most of the features that are normally enabled by default.
29 ** New configure option '--enable-link-time-optimization' to utilize
30 an appropriate feature provided by GCC since version 4.5.0.
32 ** New configure option '--enable-gcc-warnings', intended for developers.
33 If building with GCC, this enables compile-time checks that warn about
34 possibly-questionable C code. On a recent GNU system there should be
35 no warnings; on older and on non-GNU systems the generated warnings
38 ** The configure option '--disable-maintainer-mode' has been removed,
39 as it was confusingly-named and rarely useful.
42 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
43 overwriting "emacs" in the installation bin/ directory with a link
47 ** Emacs uses libtinfo in preference to libncurses, if available.
50 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
51 /usr/pkg/lib to the linker search path. You must add them yourself if
55 ** On Mac OS X, configure no longer automatically adds the Fink /sw
56 directories to the search path. You must add them yourself if you want them.
59 ** The standalone scripts rcs-checkin and vcdiff have been removed
60 (from the bin and libexec directories, respectively). The former is
61 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
63 ** The configuration option '--enable-use-lisp-union-type' has been
64 renamed to '--enable-check-lisp-object-type', as the resulting
65 Lisp_Object type no longer uses a union to implement the compile time
66 check that this option enables.
69 ** The default toolkit has been changed to Gtk+ version 3.
70 If you don't pass --with-x-toolkit to configure or if you pass
71 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
72 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
73 You can explicitly require a specific version by passing
74 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
77 * Startup Changes in Emacs 24.3
80 ** Emacs no longer searches for `leim-list.el' files beneath the standard
81 lisp/ directory. There should not be any there anyway. If you have
82 been adding them there, put them somewhere else, eg site-lisp.
85 ** The `--no-site-lisp' command line option now works for Nextstep builds.
88 * Changes in Emacs 24.3
90 ** minibuffer-electric-default-mode can rewrite (default ...) to [...].
91 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
94 ** Most y-or-n prompts now allow you to scroll the selected window.
95 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
96 respectively, without exiting from the prompt.
99 ** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
100 next and previous path separator, respectively.
104 *** New option `mode-line-default-help-echo' specifies the help text
105 (shown in a tooltip or in the echo area) for any part of the mode line
106 that does not have its own specialized help text.
108 *** You can now click mouse-3 in the coding system indicator to
109 invokes `set-buffer-file-coding-system'.
114 *** `C-h f' (describe-function) can now perform autoloading.
115 When this command is called for an autoloaded function whose docstring
116 contains a key substitution construct, that function's library is
117 automatically loaded, so that the documentation can be shown
118 correctly. To disable this, set `help-enable-auto-load' to nil.
121 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
122 even after their associated libraries have been loaded (and the
123 autoloads have been redefined as functions).
125 ** ImageMagick support, if available, is automatically enabled.
126 It is no longer necessary to call `imagemagick-register-types'
127 explicitly to install ImageMagick image types; that function is called
128 automatically at startup, or when customizing a relevant imagemagick-
131 *** Setting `imagemagick-types-inhibit' to t now disables the use of
132 ImageMagick to view images. You must call imagemagick-register-types
133 afterwards if you do not use customize to change this.
135 *** The new variable `imagemagick-enabled-types' also affects which
136 ImageMagick types are treated as images. The function
137 `imagemagick-filter-types' returns the list of types that will be
140 *** Images displayed via ImageMagick now support transparency and the
141 :background image spec property.
143 ** Server and client changes
145 *** emacsclient now obeys string values for `initial-buffer-choice',
146 if it is told to open a new frame without specifying any file to visit
147 or expression to evaluate.
149 *** New option `server-auth-key' specifies a shared server key.
151 ** In the Package Menu, newly-available packages are listed as "new",
152 and sorted above the other "available" packages by default.
155 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
156 This minor mode replaces `toggle-read-only', which is now obsolete.
158 ** Emacs now generates backtraces on fatal errors.
159 On encountering a fatal error, Emacs now outputs a textual description
160 of the fatal signal, and a short backtrace on platforms like glibc
161 that support backtraces.
163 ** `message-log-max' now defaults to 1000, not 100.
166 ** If your Emacs was built from a bzr checkout, the new variable
167 `emacs-bzr-version' contains information about the bzr revision used.
170 ** New variable `create-lockfiles' specifies usage of lockfiles.
171 It defaults to t. Changing it to nil inhibits the creation of lock
172 files (use this with caution).
175 ** Using "unibyte: t" in Lisp source files is obsolete.
176 Use "coding: raw-text" instead.
179 ** Setting `enable-remote-dir-locals' to non-nil allows directory
180 local variables on remote hosts.
183 ** The entry for PCL-CVS has been removed from the Tools menu.
184 The PCL-CVS commands are still available via the keyboard.
186 ** Internationalization changes
188 *** New language environment: Persian.
190 *** New input method `vietnamese-vni'.
192 ** NextStep/OSX port changes.
194 *** Fullscreen and frame parameter fullscreen is supported.
196 *** A file dialog is used when open/saved is done from the menu/toolbar.
198 * Editing Changes in Emacs 24.3
200 ** Navigation command changes
202 *** New binding `M-g c' for `goto-char'.
204 *** New binding `M-g TAB' for `move-to-column'.
206 *** `M-g TAB' (`move-to-column') prompts for a column number if called
207 interactively with no prefix arg. Previously, it moved to column 1.
209 ** Search and Replace changes
211 *** Non-regexp Isearch now performs "lax" space matching.
212 Each sequence of spaces in the supplied search string may match any
213 sequence of one or more whitespace characters, as specified by the
214 variable `search-whitespace-regexp'. (This variable is also used by a
215 similar existing feature for regexp Isearch).
217 *** New Isearch command `M-s SPC' toggles lax space matching.
218 This applies to both ordinary and regexp Isearch.
220 *** New option `replace-lax-whitespace'.
221 If non-nil, `query-replace' uses flexible whitespace matching too.
224 *** Global `M-s _' starts a symbol (identifier) incremental search,
225 and `M-s _' in Isearch toggles symbol search mode.
226 `M-s c' in Isearch toggles search case-sensitivity.
229 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
230 `ucs-insert' is now an obsolete alias for `insert-char'.
233 ** The `z' key no longer has a binding in most special modes.
234 It used to be bound to `kill-this-buffer', but `z' is too easy to
238 ** New option `delete-trailing-lines' specifies whether
239 M-x delete-trailing-whitespace should delete trailing lines at the end
240 of the buffer. It defaults to t.
244 *** `C-x r +' is now overloaded to invoke `append-to-register.
246 *** New option `register-separator' specifies the register containing
247 the text to put between collected texts for use with M-x
248 append-to-register and M-x prepend-to-register.
251 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
254 ** New command `C-x r M-w' (copy-rectangle-as-kill).
255 It copies the region-rectangle as the last rectangle kill.
257 ** New option `yank-handled-properties' allows processing of text
258 properties on yanked text, in more ways that are more general than
259 just removing them, as done by `yank-excluded-properties'.
262 * Changes in Specialized Modes and Packages in Emacs 24.3
266 *** The faces used by Apropos are now directly customizable.
267 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
268 see the `apropos' Custom group for details.
270 *** The old options whose values specified faces to use were removed
271 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
274 This package has been rewritten to use Tabulated List mode.
276 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
277 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
281 *** You can customize the header text that appears above each calendar month.
282 See the variable `calendar-month-header'.
285 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
287 *** The calendars produced by cal-html include holidays.
288 Customize cal-html-holidays to change this.
292 *** CL's main entry is now (require 'cl-lib).
293 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
294 i.e. all its definitions have the "cl-" prefix (and internal definitions use
297 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
298 under the name `cl-foo' instead, with the exceptions of the few definitions
299 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
300 which have not been renamed to `cl-foo*' but just `cl-foo'.
302 The old `cl' is now deprecated and is just a bunch of aliases that
303 provide the old non-prefixed names.
305 *** `cl-flet' is not like `flet' (which is deprecated).
306 Instead it obeys the behavior of Common-Lisp's `flet'.
308 *** `cl-labels' is slightly different from `labels'.
309 The difference is that it relies on the `lexical-binding' machinery (as opposed
310 to the `lexical-let' machinery used previously) to capture definitions in
311 closures, so such closures will only work if `lexical-binding' is in use.
313 *** `progv' was rewritten to use the `let' machinery.
314 A side effect is that vars without corresponding value are bound to nil
315 rather than making them unbound.
319 *** New option `compilation-always-kill'.
323 *** `custom-reset-button-menu' now defaults to t.
325 *** Non-option variables are never matched in `customize-apropos' and
326 `customize-apropos-options' (i.e. the prefix argument does nothing for
331 *** `desktop-path' no longer includes the "." directory. Desktop
332 files are now located in ~/.emacs.d by default.
337 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
340 *** The D-Bus object manager interface is implemented.
343 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
344 if their value does not fit into Emacs's integer range.
347 *** The function `dbus-call-method' works non-blocking now, it can be
348 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
351 *** Signals can be sent also as unicast message.
354 *** The argument list of `dbus-register-signal' has been extended,
355 according to the new match rule types of D-Bus. See the manual for
359 *** `dbus-init-bus' supports private connections.
362 *** There is a new function `dbus-setenv'.
366 *** Changes are now highlighted using the same color scheme as in
367 modern VCSes. Deletions are displayed in red (new faces
368 `diff-refine-removed' and `smerge-refined-removed' and new definition
369 of `diff-removed'), insertions in green (new faces `diff-refine-added'
370 and `smerge-refined-added' and new definition of `diff-added').
372 *** The variable `diff-use-changed-face' defines whether to use the
373 face `diff-changed', or `diff-removed' and `diff-added' to highlight
374 changes in context diffs.
376 *** The new command `diff-remove-trailing-whitespace' fixes trailing
377 whitespace problems introduced by the diff.
381 *** `dired-do-async-shell-command' executes each file sequentially
382 if the command ends in `;' (when operating on multiple files).
383 Otherwise, it executes the command on each file in parallel.
385 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
386 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
389 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
390 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
391 mark/unmark/flag all files in the active region.
393 *** The minibuffer default for `=' (`dired-diff) has changed.
394 It is now the backup file for the file at point, if one exists.
395 In Transient Mark mode the default is the file at the active mark.
397 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
398 The global binding for `M-=', `count-words-region' is in effect.
400 ** Ediff now uses the same color scheme as Diff mode.
402 ** erc will look up server/channel names via auth-source and use the
403 channel keys found, if any.
405 ** Flymake uses fringe bitmaps to indicate errors and warnings.
406 See flymake-fringe-indicator-position, flymake-error-bitmap and
407 flymake-warning-bitmap.
411 *** The obsolete variable `follow-mode-off-hook' has been removed.
413 *** Follow mode no longer works by using advice.
414 The option `follow-intercept-processes' has been removed.
418 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
419 specifying URL types which should be converted to remote file names at
420 the FFAP prompt. The default is now '("ftp").
424 *** New `derived-mode' filter, bound to `/ M'.
425 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
427 ** Mouse Avoidance mode
429 The new variable `mouse-avoidance-banish-position' can now be used to
430 customize Mouse Avoidance mode further.
433 ** notifications.el supports now version 1.2 of the Notifications API.
434 The function `notifications-get-capabilities' returns the supported
437 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
438 closing brackets to be aligned with the line of the opening bracket.
440 ** In Proced mode, new command `proced-renice' renices marked processes.
444 A new version of python.el, which provides several new features, including:
445 per-buffer shells, better indentation, Python 3 support, and improved
446 shell-interaction compatible with iPython (and virtually any other
449 *** Some user options have been replaced/renamed:
450 Old defcustom: | New defcustom:
451 python-indent | python-indent-offset
452 python-guess-indent | python-indent-guess-indent-offset
453 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
454 python-use-skeletons | python-skeleton-autoinsert
456 *** Some user options have been removed:
458 **** `python-indent-string-contents': Strings are never indented.
460 **** `python-honour-comment-indentation':
461 Comments are never considered as indentation markers themselves.
463 **** `python-continuation-offset': Indentation is automatically
464 calculated in a pep8 compliant way depending on the context.
466 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
467 Have no direct mapping as the shell interaction is completely different.
469 **** `python-python-command', `python-jython-command':
470 Replaced by `python-shell-interpreter'.
472 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
473 `python-pdbtrack-minor-mode-string', `python-source-modes':
476 *** Some commands have been replaced:
477 Old command | New command
478 python-insert-class | python-skeleton-class
479 python-insert-def | python-skeleton-def
480 python-insert-for | python-skeleton-for
481 python-insert-if | python-skeleton-if
482 python-insert-try/except | python-skeleton-try
483 python-insert-try/finally | python-skeleton-try
484 python-insert-while | python-skeleton-while
485 python-find-function | python-nav-jump-to-defun
486 python-next-statement | python-nav-forward-sentence
487 python-previous-statement | python-nav-backward-sentence
488 python-send-buffer | python-shell-send-buffer
489 python-send-defun | python-shell-send-defun
490 python-send-region | python-shell-send-region
491 python-send-region-and-go | Emulate with python-shell-send-region and
492 python-shell-switch-to-shell
493 python-send-string | python-shell-send-string
494 python-switch-to-python | python-shell-switch-to-shell
495 python-describe-symbol | python-eldoc-at-point
497 ** reStructuredText mode
499 *** Rebind nearly all keys making room for more keys and complying
500 better to usage in other modes. Describe bindings with C-c C-h.
502 *** Major revision of indentation working very similar to other
503 modes. TAB is your friend.
505 *** Major revision of filling working fine with most of
506 reStructuredText syntax. Support auto-filling.
508 *** Major revision of comment handling.
510 *** Major revision of fontification working with `jit-lock-mode'.
512 *** Cover reStructuredText syntax more closely. Improve
513 the experience for Sphinx users.
515 *** `rst-insert-list' inserts new list or continues existing lists.
517 *** Extend correct and improve customization.
519 *** Negative prefix argument always works for `rst-adjust'.
521 *** Reset window configuration after displaying TOC.
523 *** Package version in `rst-version'.
525 *** Support `imenu' and `which-func'.
529 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
531 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
533 *** `sh-use-smie' lets you choose a new indentation and navigation code.
537 *** New option `async-shell-command-buffer' specifies what buffer to use
538 for a new asynchronous shell command when the default output buffer
539 `*Async Shell Command*' is already taken by another running command.
543 *** DB2 added `sql-db2-escape-newlines'
545 If non-nil, newlines sent to the command interpreter will be escaped
546 by a backslash. The default does not escape the newlines and assumes
547 that the sql statement will be terminated by a semicolon.
549 ** Tabulated List and packages derived from it
551 *** New command `tabulated-list-sort', bound to `S', sorts the column
552 at point, or the Nth column if a numeric prefix argument is given.
556 The variables `term-default-fg-color' and `term-default-bg-color' are
557 now deprecated in favor of the `term-face' face, that you can
558 customize. Also, it is now possible to customize how are displayed the
559 ANSI terminal colors and styles by customizing the corresponding
560 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
565 *** The syntax has been extended in order to allow ad-hoc proxy
566 definitions. See the manual for details.
568 *** Remote processes are now supported also on remote Windows host.
572 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
573 Previously, this slot stored semicolon-separated attribute-value pairs
574 appended to some imap URLs, but this is not compatible with RFC 3986.
575 So now the `filename' slot stores the entire path and query components
576 and the `attributes' slot is always nil.
578 *** New function `url-encode-url' for encoding a URI string.
579 The `url-retrieve' function now uses this to encode its URL argument,
580 in case that is not properly encoded.
584 *** The free software compiler GHDL is supported (and now the default).
586 *** Support for the VHDL-AMS packages has been added/updated.
588 *** Updated to the 2002 revision of the VHDL standard.
590 *** Accepts \r and \f as whitespace.
592 ** which-function-mode now applies to all applicable major modes by default.
595 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
598 ** FIXME something happened to ses.el, 2012-04-17.
601 ** Obsolete packages:
604 In most cases, assoc+member+push+delq work just as well.
605 And in any case it's just a terrible package: ugly semantics, terrible
606 inefficiency, and not namespace-clean.
621 * New Modes and Packages in Emacs 24.3
623 * Incompatible Lisp Changes in Emacs 24.3
625 ** set-buffer-multibyte now signals an error in narrowed buffers.
628 ** (random) by default now returns a different random sequence in
629 every Emacs run. Use (random S), where S is a string, to set the
630 random seed to a value based on S, in order to get a repeatable
631 sequence in later calls.
634 ** The function `x-select-font' can return a font spec, instead of a
635 font name as a string. Whether it returns a font spec or a font name
636 depends on the graphical library.
638 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
639 that substring is inserted literally even if the LITERAL arg is
640 non-nil, instead of causing an error to be signaled.
643 ** Docstrings starting with `*' no longer indicate user options.
644 Only variables defined using `defcustom' are considered user options.
645 The function `user-variable-p' is now an obsolete alias for
649 ** The return values of `defalias', `defun' and `defmacro' have changed,
650 and are now undefined. For backwards compatibility, defun and
651 defmacro currently return the name of the newly defined function/macro
652 but this should not be relied upon.
655 ** `face-spec-set' no longer sets frame-specific attributes when the
656 third argument is a frame (that usage was obsolete since Emacs 22.2).
659 ** The arguments of `dbus-register-signal' are no longer just strings,
660 but keywords or keyword-string pairs. The old argument list will
661 still be supported for Emacs 24.x.
664 Some Lisp symbols have been renamed to avoid problems with spelling
665 that is incorrect or inconsistent with how Emacs normally spells a word.
667 *** Renamed functions
669 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
670 **** inactivate-input-method -> deactivate-input-method
671 **** quail-inactivate -> quail-deactivate
672 **** robin-inactivate -> robin-deactivate
673 **** viper-inactivate-input-method -> viper-deactivate-input-method
674 **** viper-inactivate-input-method-action ->
675 viper-deactivate-input-method-action
676 **** ucs-input-inactivate -> ucs-input-deactivate
679 The old hooks are still supported for backward compatibility, but they
680 are deprecated and will be removed eventually.
682 **** input-method-inactivate-hook -> input-method-deactivate-hook
683 **** robin-inactivate-hook -> robin-deactivate-hook
684 **** quail-inactivate-hook -> quail-deactivate-hook
686 *** Renamed Lisp variables
688 **** follow-deactive-menu -> follow-inactive-menu
689 **** inactivate-current-input-method-function ->
690 deactivate-current-input-method-function
692 ** Some obsolete functions, variables, and faces were removed:
694 *** `facemenu-unlisted-faces'
695 *** `rmail-decode-mime-charset'
696 *** `last-input-char', `last-command-char', `unread-command-char'.
697 *** `iswitchb-read-buffer'
698 *** `sc-version', `sc-submit-bug-report'
699 *** `set-char-table-default'
700 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
701 *** `compile-internal'
702 *** `mode-line-inverse-video'
703 *** `cvs-commit-buffer-require-final-newline'
704 (use `'log-edit-require-final-newline'instead)
705 *** `cvs-changelog-full-paragraphs'
706 (use `log-edit-changelog-full-paragraphs' instead)
707 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
708 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
709 *** `vc-master-templates' (use `vc-handled-backends' instead)
710 *** `vc-checkout-carefully'
714 * Lisp changes in Emacs 24.3
716 ** New sampling-based Elisp profiler.
717 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
718 The sampling rate can be based on CPU time (only supported on some
719 systems), or based on memory allocations.
721 ** CL-style generalized variables are now in core Elisp.
722 `setf' is autoloaded; `push' and `pop' accept generalized variables.
724 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
725 The interpretation of the DECLS is determined by `defun-declarations-alist'.
729 *** New function `completion-table-with-quoting' to handle completion
730 in the presence of quoting, such as file completion in shell buffers.
732 *** New function `completion-table-subvert' to use an existing completion
733 table, but with a different prefix.
737 *** New error type and new function `user-error'.
738 These do not trigger the debugger.
740 *** New option `debugger-bury-or-kill'.
742 *** Set `debug-on-message' to enter the debugger when a certain
743 message is displayed in the echo area. This can be useful when trying
744 to work out which code is doing something.
746 *** New var `inhibit-debugger', automatically set to prevent accidental
747 recursive invocations.
751 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
752 of `read-regexp' accepts a string ending with a colon and space, and its
753 second argument DEFAULTS can be a list of strings accessible via M-n
754 in the minibuffer ahead of other hard-coded useful regexp-related values.
755 More commands use `read-regexp' now to read their regexp arguments.
759 *** The functions get-lru-window, get-mru-window and get-largest-window
760 now accept a third argument to avoid choosing the selected window.
762 *** Additional values recognized for option `window-combination-limit'.
764 *** New macro `with-temp-buffer-window'.
766 *** `temp-buffer-resize-mode' no longer resizes windows that have been
769 *** New function `fit-frame-to-buffer' and new options
770 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
772 *** New display action functions `display-buffer-below-selected',
773 `display-buffer-at-bottom' and `display-buffer-in-previous-window'.
775 *** New display action alist entry `inhibit-switch-frame', if non-nil,
776 tells display action functions to avoid changing which frame is
779 *** New display action alist entry `pop-up-frame-parameters', if
780 non-nil, specifies frame parameters to give any newly-created frame.
782 *** New display action alist entry `previous-window', if non-nil,
783 specifies window to reuse in `display-buffer-in-previous-window'.
785 *** New display action alist entries `window-height' and `window-width'
786 to specify size of new window created by `display-buffer'.
788 *** The following variables are obsolete, as they can be replaced by
789 appropriate entries in the `display-buffer-alist' function introduced
792 **** `display-buffer-reuse-frames'
793 **** `special-display-regexps'
794 **** `special-display-frame-alist'
795 **** `special-display-buffer-names'
796 **** `special-display-function'
797 **** `display-buffer-function'
798 **** `dired-shrink-to-fit'
802 *** `current-time-string' no longer requires that its argument's year
803 must be in the range 1000..9999. It now works with any year supported
804 by the underlying C implementation.
806 *** `current-time' now returns extended-format time stamps
807 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
808 PSEC is typically a multiple of 1000 on current machines. Other
809 functions that use this format, such as file-attributes and
810 format-time-string, have been changed accordingly. Old-format time
811 stamps are still accepted.
813 *** The format of timers in timer-list and timer-idle-list is now
814 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
815 The PSECS slot is new, and uses picosecond resolution. It can be
816 accessed via the new timer--psecs accessor.
819 ** Floating point functions now always return special values like NaN,
820 instead of signaling errors, if given invalid args, e.g. (log -1.0).
821 Previously, they returned NaNs on some platforms but signaled errors
822 on others. The affected functions are acos, asin, tan, exp, expt,
823 log, log10, sqrt, and mod.
825 ** Interpreted files are eagerly macro-expanded during load.
826 This can significantly speed up execution of non-byte-compiled code,
827 but can also bump into harmless and previously unnoticed cyclic
828 dependencies. These should not be fatal: they will simply cause the
829 macro-calls to be left for later expansion (as before), but will also
830 result in a warning ("Eager macro-expansion skipped due to cycle")
831 describing the cycle.
833 ** Misc new functions:
836 *** `autoload-do-load'.
838 *** `buffer-narrowed-p' tests if the buffer is narrowed.
839 *** `file-name-base' returns a file name sans directory and extension.
840 *** `function-get' fetches a function property, following aliases.
842 *** `posnp' tests if an object is a `posn'.
843 *** `set-temporary-overlay-map' sets up a temporary overlay map.
845 *** `system-users' returns the user names on the system.
847 *** `system-groups' returns the group names on the system.
848 *** `tty-top-frame' returns the topmost frame of a text terminal.
850 ** New macros `setq-local' and `defvar-local'.
852 ** New fringe bitmap `exclamation-mark'.
854 ** Face underlining can now use a wave.
855 See the "Face Attributes" section of the Elisp manual.
857 ** The following functions and variables are obsolete:
859 *** `automount-dir-prefix'
860 *** `buffer-has-markers-at'
861 *** `macro-declaration-function' (use `macro-declarations-alist').
862 *** `window-system-version'
863 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
864 *** `query-replace-interactive'
867 * Changes in Emacs 24.3 on non-free operating systems
869 ** New configure.bat options on MS-Windows:
871 *** --without-libxml2 omits support for libxml2, even if its presence
874 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
875 Emacs now supports mouse highlight, help-echo (in the echo area), and
876 mouse-autoselect-window.
878 ** On MS-Windows Vista and later Emacs now supports symbolic links.
880 * Changes in Emacs 24.2
882 ** This is mainly a bug-fix release.
885 * Installation Changes in Emacs 24.1
887 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
888 to configure. Note that other libraries used by Emacs, RSVG and GConf,
889 also depend on Gtk+. You can disable them with --without-rsvg and
892 ** Emacs can be compiled with GnuTLS support.
893 This happens by default if a suitably recent version of the library is
894 found at build time. To prevent this, use the configure option
895 `--without-gnutls'. See below for GnuTLS features.
897 ** Emacs can be compiled with SELinux support.
898 This happens by default if a suitably recent version of the library is
899 found at build time. To prevent this, use the configure option
900 `--without-selinux'. See below for SELinux features.
902 ** Emacs can be compiled with ImageMagick support.
903 This happens by default if a suitably recent version of the library is
904 found at build time. To prevent this, use the configure option
905 `--without-imagemagick'. See below for ImageMagick features.
906 This feature is not available for the Nextstep or MS ports.
908 ** Emacs can be compiled with libxml2 support.
909 This happens by default if a suitably recent version of the library is
910 found at build time. To prevent this, use the configure option
911 `--without-xml2'. See below for libxml2 features.
913 ** By default, the installed Info and man pages are compressed.
914 You can disable this by configuring --without-compress-info.
916 ** New configure option --with-wide-int.
917 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
918 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
921 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
922 These provide no new functionality, they just remove the need to edit
923 lib-src/Makefile by hand in order to use the associated features.
925 ** New configure option --enable-use-lisp-union-type.
926 This is only useful for Emacs developers to debug certain types of bugs.
927 This is not a new feature; only the configure flag is new.
929 ** The standalone programs digest-doc and sorted-doc are removed.
930 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
932 ** The standalone program `fakemail' is removed.
933 If you need it, feedmail.el provides a superset of the functionality.
936 * Startup Changes in Emacs 24.1
938 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
939 command line arguments, and the EMACS_UNIBYTE environment variable, no
940 longer have any effect. (They were declared obsolete in Emacs 23.)
942 ** New command line option `--no-site-lisp' removes site-lisp directories
943 from load-path. -Q now implies this. This option does not affect the
944 EMACSLOADPATH environment variable (and hence has no effect for
948 * Changes in Emacs 24.1
952 *** Many packages now use the `completion-at-point' command,
953 rather than implementing separate completion commands.
955 *** `completion-at-point' now handles tags and semantic completion.
957 *** Completion in a non-minibuffer now tries to detect the end of completion
958 and pops down the *Completions* buffer accordingly.
960 *** New option `completion-cycle-threshold' allows completion cycling.
962 *** New option `completion-category-overrides' for overriding the
963 default completion style in certain circumstances.
965 *** New completion style `substring'.
967 *** Completion of buffer names uses `substring' completion by default.
969 *** The option `widget-complete-field' has been removed.
973 *** The first time you try sending mail, Emacs asks for a mail method.
974 This is implemented by a new default for `send-mail-function', which
975 is `sendmail-query-once'. This offers to use the smtpmail package, or
976 to use the old defaults relying on external mail facilities
977 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
978 `mailclient-send-it' on Windows).
980 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
981 the report to your desktop's preferred mail client, if there is one.
982 This uses either the "xdg-email" utility, or Mac OS's "open" command.
984 *** See Changes in Specialized Modes and Packages for SMTPmail changes
985 and Mail mode changes
987 ** Emacs server and client changes
989 *** New option `server-port' specifies the port for TCP Emacs servers.
991 *** New emacsclient argument -q/--quiet suppresses some status messages.
993 *** New emacsclient argument --frame-parameters specifies the frame
994 parameters of any newly-created graphical frame.
996 *** If emacsclient shuts down due to Emacs signaling an error,
997 its exit status is 1.
999 *** New emacsclient argument --parent-id ID.
1000 This opens a client frame in parent X window ID, via XEmbed, similar
1001 to the --parent-id argument to Emacs.
1003 ** Internationalization changes
1005 *** Emacs now supports display and editing of bidirectional text.
1006 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1007 displayed in the correct visual order as expected by users of those
1008 scripts. The display reordering is a "full bidirectionality" class
1009 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1010 with no RTL text should look exactly the same as before.
1012 **** New buffer-local variable `bidi-display-reordering'.
1013 To disable display reordering in a buffer, change this to nil.
1015 **** New buffer-local variable `bidi-paragraph-direction'.
1016 If nil (the default), Emacs determines the base direction of each
1017 paragraph from its text, as specified by the UBA. Setting the value
1018 to `right-to-left' or `left-to-right' forces a base direction on each
1021 Paragraphs with right-to-left base direction are displayed starting at
1022 the right window edge.
1024 *** Enhanced support for characters with no glyphs in available fonts,
1025 or, on text terminals, characters that cannot be encoded by the
1026 terminal coding system. The new option `glyphless-char-display-control'
1027 specifies how to display them: as a hexadecimal code in a box, a thin
1028 1-pixel space, an empty box, etc.
1030 *** New input methods for Farsi and Bulgarian
1031 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1033 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1034 (U+2010 and U+2011).
1036 *** New Hebrew translation of the Emacs Tutorial.
1037 Type `C-u C-h t' to choose it in case your language setup doesn't
1038 automatically select it.
1040 ** An Emacs Lisp package manager is now included.
1041 This is a convenient way to download and install additional packages,
1042 from a package repository at http://elpa.gnu.org.
1044 *** M-x list-packages shows a list of packages, which can be
1045 selected for installation.
1047 *** New command `describe-package', bound to `C-h P'.
1049 *** By default, all installed packages are loaded automatically when
1050 Emacs starts up. To disable this, set `package-enable-at-startup' to
1051 nil. To specify the packages to load, customize `package-load-list'.
1053 ** Custom theme changes
1055 *** New command `M-x customize-themes', which provides a convenient
1056 interface for enabling and disabling Custom themes.
1058 *** New option `custom-theme-load-path' is the load path for themes.
1059 Emacs no longer looks for Custom themes in `load-path'. The default
1060 value of `custom-theme-load-path' says to look for themes in
1061 `custom-theme-directory', followed by a subdirectory of
1062 `data-directory' named "themes/", which contains a small selection of
1063 built-in Custom themes.
1065 *** New option `custom-safe-themes' records known-safe theme files.
1066 If a theme is not in this list, Emacs queries before loading it, and
1067 offers to save the theme to `custom-safe-themes' automatically. By
1068 default, all themes included in Emacs are treated as safe.
1070 ** Improved GTK integration
1072 *** GTK scroll-bars are now placed on the right by default.
1073 The function `set-scroll-bar-mode' can change this.
1075 *** GTK tool bars can have just text, just images or images and text.
1076 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1077 the default is taken from desktop settings.
1079 *** GTK tool bars can be placed on any edge of the frame.
1080 The frame-parameter tool-bar-position controls this. It takes the
1081 values top, left, right or bottom. The Options => Show/Hide menu has
1084 *** The default colors for selected text (the `region' face) are taken
1085 from the GTK theme when Emacs is built with GTK.
1087 *** Emacs uses GTK tooltips by default if built with GTK.
1088 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1090 ** Graphical interface changes
1092 *** On graphical displays, the mode-line no longer ends in dashes.
1093 Also, the first dash (which does not indicate anything) is just
1094 displayed as a space.
1096 *** `menu-bar-select-buffer-function' lets you choose another operation
1097 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1099 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1100 built with Xft. These fonts can be set via X resources, for example:
1101 Emacs.pane.menubar.font: Courier-12
1105 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1106 or if it receives a SIGINT signal in batch mode.
1108 *** `kill-emacs-hook' is now also run in batch mode.
1109 Third-party code which adds to `kill-emacs-hook' should check if they
1110 do the right thing in batch mode.
1112 ** Scrolling changes
1114 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1115 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1116 of buffer at first key-press (instead they move to top/bottom of buffer)
1117 when `scroll-error-top-bottom' is non-nil.
1119 *** New option `scroll-error-top-bottom' (see above).
1121 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1122 scroll a line instead of full screen.
1124 *** New property `scroll-command' should be set on a command's symbol to
1125 define it as a scroll command affected by `scroll-preserve-screen-position'.
1127 *** If you customize `scroll-conservatively' to a value greater than 100,
1128 Emacs will never recenter point in the window when it scrolls due to
1129 cursor motion commands or commands that move point (e.f., `M-g M-g').
1130 Previously, you needed to use `most-positive-fixnum' as the value of
1131 `scroll-conservatively' to achieve the same effect.
1133 *** "Aggressive" scrolling now honors the scroll margins.
1134 If you customize `scroll-up-aggressively' or
1135 `scroll-down-aggressively' and move point off the window, Emacs now
1136 scrolls the window so as to avoid positioning point inside the scroll
1139 ** Basic SELinux support has been added.
1140 This requires Emacs to be linked with libselinux at build time.
1142 *** Emacs preserves the SELinux file context when backing up.
1143 Also, the function `copy-file' has an extra optional argument for
1144 preserving SELinux context, and the return value of `backup-buffer'
1145 now includes the SELinux context.
1147 *** New functions `file-selinux-context' and `set-file-selinux-context'
1148 get and set the SELinux context of a file.
1152 *** `delete-by-moving-to-trash' now only affects commands that specify
1153 trashing. This avoids inadvertently trashing temporary files.
1155 *** Calling `delete-file' or `delete-directory' with a prefix argument
1156 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1158 ** File- and directory-local variable changes
1160 *** You can stop directory local vars from applying to subdirectories.
1161 Add an element (subdirs . nil) to the alist portion of any variables
1162 settings to indicate that the section should not apply to
1165 *** Directory local variables can apply to some file-less buffers.
1166 Affected modes include dired, vc-dir, and log-edit. For example,
1167 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1168 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1169 `hack-dir-local-variables-non-file-buffer' to support this.
1171 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1172 Instead, use "eval: (minor-mode 1)".
1174 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1175 to `inhibit-local-variables-regexps'. As the name suggests, it now
1176 applies to ALL file local variables, not just -*- lines. The
1177 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1182 *** The `quit-window' command now restores the last buffer displayed
1183 in the quitted window.
1185 *** Resizing an Emacs frame now preserves proportional window sizes,
1186 modulo restrictions like window minimum sizes and fixed-size windows.
1188 *** The behavior of `display-buffer' is now customizable in detail.
1190 **** New option `display-buffer-base-action' specifies a list of
1191 user-determined display "actions" (functions and optional arguments
1192 for choosing the displaying window).
1194 This takes precedence over the default display action, which is
1195 specified by `display-buffer-fallback-action'.
1197 **** New option `display-buffer-alist' maps buffer name regexps to
1198 display actions, taking precedence over `display-buffer-base-action'.
1200 *** New option `window-combination-limit'.
1201 The new option `window-combination-limit' allows to return the space
1202 obtained for resizing or creating a window more reliably to the window
1203 from which such space was obtained.
1205 *** New option `window-combination-resize'.
1206 The new option `window-combination-resize' allows to split a window that
1207 otherwise cannot be split because it's too small by stealing space from
1208 other windows in the same combination. Subsequent resizing or deletion
1209 of the window will resize all windows in the same combination as well.
1211 *** New option `frame-auto-hide-function' lets you choose between
1212 iconifying or deleting a frame when burying a buffer in a dedicated
1213 frame, or quitting a window showing a buffer in a frame of its own.
1215 *** New commands `maximize-window' and `minimize-window'.
1216 These maximize and minimize the size of a window within its frame.
1218 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1219 These functions allow to navigate through the live buffers that have
1220 been shown in a specific window.
1222 ** Minibuffer changes
1224 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1225 This is handy for minibuffer-only frames, and is also used for the feature
1226 where mouse-1 pops up *Messages*"', which can now easily be changed.
1228 *** Minibuffers set `truncate-lines' to nil.
1229 If you want to change the value to something else, you could use
1230 for example `minibuffer-setup-hook'.
1232 ** `auto-mode-case-fold' is now enabled by default.
1234 ** `backup-by-copying-when-mismatch' now defaults to t.
1236 ** New basic faces `error', `warning', `success'.
1237 These are used to highlight text indicating failure, caution or
1238 successful operation.
1240 ** New option `list-colors-sort' defines the color sort order
1241 for `list-colors-display'.
1243 ** The variable `focus-follows-mouse' now always defaults to nil.
1246 * Editing Changes in Emacs 24.1
1250 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1251 `isearch-yank-line'.
1253 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1254 `isearch-yank-kill'.
1256 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1258 ** New commands `count-words-region' and `count-words'.
1260 *** M-= is bound to `count-words-region', not `count-lines-region'.
1261 The `count-words-region' command, when called interactively, reports
1262 the number of lines, words, and characters in the region. It is a
1263 superset of the old `count-lines-region', which is now an obsolete
1266 ** The command `just-one-space' (M-SPC), if given a negative argument,
1267 also deletes newlines around point.
1271 *** New option `delete-active-region'.
1272 If non-nil, [delete] and DEL delete the region if it is active and no
1273 prefix argument is given. If set to `kill', those commands kill
1276 *** New command `delete-forward-char', bound to [delete].
1277 This is meant for interactive use, and obeys `delete-active-region'.
1278 The command `delete-char' does not obey `delete-active-region'.
1280 *** `delete-backward-char' is now a Lisp function.
1281 Apart from obeying `delete-active-region', its behavior is unchanged.
1282 However, the byte compiler now warns if it is called from Lisp; Lisp
1283 callers should use delete-char with a negative argument instead.
1285 *** The option `mouse-region-delete-keys' has been deleted.
1287 ** Selection changes.
1289 The default handling of clipboard and primary selections has been
1290 changed to conform with modern X applications. In short, most
1291 commands for killing and yanking text now use the clipboard, while
1292 mouse commands use the primary selection.
1294 In the following, we provide a list of these changes, followed by a
1295 list of steps to get the old behavior back if you prefer that.
1297 *** `select-active-regions' now defaults to t.
1298 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1299 the kill ring. The selected text is put in the primary selection, if
1300 the system possesses a separate primary selection facility (e.g. X).
1302 **** `select-active-regions' also accepts a new value, `only'.
1303 This means to only set the primary selection for temporarily active
1304 regions (usually made by mouse-dragging or shift-selection);
1305 "ordinary" active regions, such as those made with C-SPC followed by
1306 point motion, do not alter the primary selection.
1308 **** `mouse-drag-copy-region' now defaults to nil.
1310 *** mouse-2 is now bound to `mouse-yank-primary'.
1311 This pastes from the primary selection, ignoring the kill-ring.
1312 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1314 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1316 *** `x-select-enable-primary' now defaults to nil.
1317 Thus, commands that kill text or copy it to the kill-ring (such as
1318 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1320 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1321 exactly equivalent to M-w, C-w, and C-y respectively.
1323 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1324 non-nil by default, as Windows does not support the primary selection
1325 between applications.
1327 *** To return to the previous behavior, do the following:
1329 **** Change `select-active-regions' to nil.
1330 **** Change `mouse-drag-copy-region' to t.
1331 **** Change `x-select-enable-primary' to t (on X only).
1332 **** Change `x-select-enable-clipboard' to nil.
1333 **** Bind `mouse-yank-at-click' to mouse-2.
1335 *** Support for X cut buffers has been removed.
1337 *** X clipboard managers are now supported.
1338 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1340 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1341 in the current rectangle. With a prefix argument, this prompts for a
1342 number to count from and for a format string.
1344 ** `redisplay-dont-pause' now defaults to t.
1345 This makes Emacs feel more responsive to editing commands that arrive
1346 at high rate, e.g. if you lean on some key, because stopping redisplay
1347 in the middle (when this variable is nil) forces more expensive
1348 updates later on, and Emacs appears to be unable to keep up.
1350 ** The behavior of <TAB> for active regions in Text mode has changed.
1351 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1352 when the region is active causes Emacs to indent all the lines in the
1353 region, aligning them with the line previous to the first line in the
1354 region (or with the left margin if there is no previous line).
1356 ** When `occur' is called with a prefix argument, matching strings are
1357 collected into the `*Occur*' buffer without line numbers. If there
1358 are parenthesized subexpressions in the specified regexp, `occur'
1359 reads replacement text that may contain \\& and \\N whose convention
1360 follows `replace-match'.
1363 * Changes in Specialized Modes and Packages in Emacs 24.1
1365 ** Archive Mode has basic support for browsing and updating 7z archives.
1369 *** BibTeX mode now supports biblatex.
1370 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1371 `bibtex-entry-field-alist' is now an obsolete alias for
1372 `bibtex-BibTeX-entry-alist'.
1374 *** New command `bibtex-search-entries', bound to C-c C-a.
1376 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1378 *** New variable `bibtex-search-entry-globally'.
1382 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1384 *** The default browser used by the package is now the "xdg-open" program,
1385 on platforms that support it. This calls your desktop's preferred browser.
1387 ** Calendar, Diary, and Appt
1389 *** Diary entries can contain non-printing "comments".
1390 See the variable `diary-comment-start'.
1392 *** Appointments can specify their individual warning times.
1393 See the variable `appt-warning-time-regexp'.
1395 *** The function specified by `appt-disp-window-function' may be passed
1396 lists of arguments if multiple appointments are due at similar times.
1397 If you are using a custom function for this, you should update it.
1399 *** New function `diary-hebrew-birthday'.
1401 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1402 may no longer be nil, but must all be strings.
1404 *** The obsolete (since Emacs 22.1) method of enabling the appt
1405 package by adding `appt-make-list' to `diary-hook' has been removed.
1406 Use `appt-activate' instead.
1408 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1409 appt-issue-message (use the function appt-activate)
1410 appt-visible/appt-msg-window (use the variable appt-display-format)
1412 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1413 view-diary-entries, list-diary-entries, show-all-diary-entries
1417 *** New feature to "guess" the style in an existing buffer.
1418 The main entry point is M-x c-guess.
1420 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1422 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1423 Thus C-M-a will, by default, go to the beginning of the immediate function,
1426 *** "Macros with semicolons" can be registered for correct indentation.
1427 Where such a macro ends a line (no semicolon) the next statement is no longer
1428 parsed as a statement continuation.
1430 ** Comint and modes derived from it use the standard completion code.
1434 *** Compilation mode can be used without Font Lock mode.
1435 `compilation-parse-errors-function' is now obsolete.
1437 *** New variable `compilation-filter-start', which is bound while
1438 `compilation-filter-hook' runs. It records the start position of the
1439 text inserted by `compilation-filter'.
1441 *** `compilation-error-screen-columns' and `compilation-first-column'
1442 are obeyed in the editing buffer. So programming language modes can
1443 set them, whereas previously only the value in the *Compilation*
1448 *** Customize buffers now contain a search field.
1449 The search is performed using `customize-apropos'.
1450 To turn off the search field, set `custom-search-field' to nil.
1452 *** Options in customize group buffers start out hidden if not customized.
1453 Use the arrow to the left of the option name to toggle visibility.
1455 *** custom-buffer-sort-alphabetically now defaults to t.
1457 *** The color widget now has a "Choose" button, which allows you to
1458 choose a color via `list-colors-display'.
1462 *** It is now possible to access buses other than the default system
1465 *** The `dbus-register-method' and `dbus-register-property' functions
1466 optionally do not register names.
1468 *** The new function `dbus-register-service' registers a known service
1469 name on a D-Bus without also registering a property or a method.
1473 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1474 if called with a prefix argument, read a file name from the minibuffer
1475 instead of using the current buffer.
1477 *** The "dired local variables" feature of Dired-x is obsolete.
1478 The standard directory local variables feature replaces it.
1482 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1483 controlling attempts to autojoin a channel.
1485 *** New variable `erc-coding-system-precedence': If we use `undecided'
1486 as the server coding system, this variable will then be consulted.
1487 The default is to decode strings that can be decoded as utf-8 as
1488 utf-8, and do the normal `undecided' decoding for the rest.
1492 *** The default value of `eshell-directory-name' has changed
1493 to be an "eshell" directory in `user-emacs-directory'.
1494 The old "~/.eshell/" directory is still used if it exists, though.
1498 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1499 It now supports multithread non-stop debugging and simultaneous
1500 debugging of several threads.
1504 *** RET (`image-toggle-animation') toggles animation, if applicable.
1505 Animation plays once, unless the option `image-animate-loop' is non-nil.
1509 *** New command M-x info-display-manual displays a named Info manual.
1510 If that manual is already visited in some Info buffer, it displays
1511 that buffer. (This is handy if you have many manuals in many *info*
1512 buffers, and don't remember the name of the buffer visiting the manual
1513 you want to consult.) Otherwise, it loads and displays the manual.
1515 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1516 This is for compatibility with the stand-alone Info reader program,
1517 and also because `Info-edit' is a rarely used command that is disabled
1520 ** Mail mode changes (not Message mode)
1522 *** New command M-x mail-add-attachment for adding MIME attachments
1524 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1525 (Its name is misleading, since it has nothing to do with MIME
1526 attachments.) The old name is now an obsolete alias to the new name.
1528 ** MH-E has been updated to MH-E version 8.3.1.
1529 See MH-E-NEWS for details.
1531 ** Modula-2 mode provides auto-indentation.
1533 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1535 ** nXML mode no longer binds C-RET to `nxml-complete'.
1536 Completion is now performed via `completion-at-point', bound to C-M-i
1537 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1538 default), this performs tag completion.
1540 ** Org mode has been updated to version 7.8.09.
1541 See ORG-NEWS for details.
1543 ** Prolog mode has been completely revamped, with lots of additional
1544 functionality such as more intelligent indentation, electricity,
1545 support for more variants, including Mercury, and a lot more.
1549 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1550 in the Rmail incoming message.
1552 *** The variable `rmail-message-filter' no longer has any effect.
1553 This change was made in Emacs 23.1 but was not advertised at the time.
1554 Try using `rmail-show-message-hook' instead.
1558 *** M-x shell prompts for the shell path name if the default directory
1559 is a remote file name and neither the environment variable $ESHELL nor
1560 the variable `explicit-shell-file-name' is set.
1562 *** TAB is now bound to the standard `completion-at-point' command,
1563 which now implements the pcomplete rules for shell command completion.
1567 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1568 if the mail server supports them. This uses either built-in GnuTLS
1569 support, or the starttls.el library. Customize `smtpmail-stream-type'
1572 *** The variable `smtpmail-auth-credentials' has been removed.
1573 By default, the information is now stored in the file ~/.authinfo.
1574 This was the default value of smtpmail-auth-credentials. If you had
1575 customized smtpmail-auth-credentials to a list of user names and
1576 passwords, those settings are not used. During your first connection
1577 to the smtp server, Emacs will prompt for the user name and password,
1578 and offer to save them to ~/.authinfo. Or you can manually copy the
1579 credentials to ~/.authinfo. For example, if you had
1581 (setq smtpmail-auth-credentials
1582 '(("mail.example.org" 25 "jim" "s!cret")))
1584 then the equivalent line in ~/.authinfo would be
1586 machine mail.example.org port 25 login jim password s!cret
1588 See the auth-source manual for more information, e.g. on encrypting
1589 the credentials file.
1591 *** The variable `smtpmail-starttls-credentials' has been removed.
1592 If you had that set, you need to put
1594 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1596 in your ~/.authinfo file instead.
1598 *** SMTPmail defaults to using the address in the From: header as the
1599 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1600 to the address you wish to use instead.
1604 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1605 and `sql-oracle-scan-on'.
1607 *** New options controlling prompting for login parameters.
1608 Each supported product has a custom variable `sql-*-login-params',
1609 which is a list of the parameters to be prompted for before a
1610 connection is established.
1612 *** The command `sql-product-interactive' now takes a prefix argument,
1613 which causes it to prompt for an SQL product.
1615 *** Product-specific SQL interactive commands now take prefix arguments.
1616 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1617 given a prefix argument, prompt for a name for the SQL interactive
1618 buffer. This reduces the need for calling `sql-rename-buffer'.
1620 *** SQL interactive modes suppress command continuation prompts, and
1621 replace tabs with spaces. The first change impacts multiple line SQL
1622 statements entered with C-j between each line, statements yanked into
1623 the buffer and statements sent with `sql-send-*' functions. The
1624 second prevents the MySQL and Postgres interpreters from listing
1625 object name completions when sent text via `sql-send-*' functions.
1627 *** New command `sql-connect' starts a predefined SQLi session,
1628 using the login parameters from `sql-connection-alist'.
1630 *** New "Save Connection" menu item in SQLi buffers.
1631 This gathers the login params specified for the SQLi session, if it
1632 was not started by a connection, and saves them as a new connection.
1634 *** New commands for listing database objects and details:
1635 sql-list-all and sql-list-table.
1637 *** An API for manipulating SQL product definitions has been added.
1641 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1645 *** New inline access method "ksu" (kerberized su).
1647 *** The following access methods are discontinued: "ssh1_old",
1648 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1650 *** The user option `remote-file-name-inhibit-cache' controls whether
1651 remote file attributes are cached for better performance.
1653 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1654 default value to "".
1656 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1657 for remote machines which support SELinux.
1659 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1660 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1661 the degree of parallelism.
1663 ** VC and related modes
1665 *** Support for pulling on distributed version control systems.
1666 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1667 supported (currently with Bzr, Git, and Mercurial), to update the
1668 current branch and working tree. A prefix argument means to prompt
1669 the user for specifics, e.g. a pull location.
1671 *** `vc-update' is now an alias for `vc-pull'.
1673 *** Support for merging on distributed version control systems.
1674 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1675 is supported (currently with Bzr, Git, and Mercurial), to merge
1676 changes from another branch into the current one. It prompts for
1677 specifics, e.g. a merge source.
1679 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1680 shows a diff while querying the user. It defaults to t.
1682 *** Log entries in some Log View buffers can be toggled to display a
1683 longer description by typing RET (log-view-toggle-entry-display).
1684 This is currently supported for Bzr, Git, and Mercurial (to support
1685 another backend, define a `log-view-expanded-log-entry-function').
1686 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1687 use this to display the full log entry for the revision at point.
1689 *** New command `vc-ediff' allows visual comparison of two revisions
1690 of a file similar to `vc-diff', but using ediff backend.
1692 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1693 this was not advertised at the time.
1695 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1696 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1697 this was not advertised at the time.
1703 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1705 *** partial-completion-mode (complete.el) is obsolete.
1706 You can get a comparable behavior with:
1707 (setq completion-styles '(partial-completion initials))
1708 (setq completion-pcm-complete-word-inserts-delimiters t)
1710 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1712 *** pgg is obsolete (use EasyPG instead).
1714 *** sregex.el is obsolete, since rx.el is a strict superset.
1716 *** s-region.el and pc-select.el are obsolete.
1717 They are superseded by shift-select-mode, enabled by default since 23.1.
1719 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1723 *** The Landmark game is now invoked with `landmark', not `lm'.
1724 Its functions and variables have been similarly renamed.
1726 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1727 (This interfered with cua-mode.)
1729 *** f90.el has some support for Fortran 2008 syntax.
1731 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1733 *** New command `nato-region' converts text to NATO phonetic alphabet.
1736 * New Modes and Packages in Emacs 24.1
1738 ** Occur Edit mode applies edits made in *Occur* buffers to the
1739 original buffers. It is bound to "e" in Occur mode.
1741 ** New global minor mode electric-pair-mode.
1742 When enabled, typing an open parenthesis automatically inserts the
1743 matching closing one.
1745 ** New global minor mode electric-indent-mode.
1746 When enabled, typing certain characters triggers reindentation.
1747 Major modes wishing to use this can set electric-indent-chars or
1748 electric-indent-functions.
1750 ** New global minor mode electric-layout-mode.
1751 When enabled, typing certain characters automatically inserts newlines.
1752 Major modes wishing to use this can set electric-layout-rules.
1754 ** tabulated-list.el provides a generic major mode for tabulated data,
1755 from which other modes can be derived.
1757 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1759 ** secrets.el is an implementation of the Secret Service API, an
1760 interface to password managers like GNOME Keyring or KDE Wallet. The
1761 Secret Service API requires D-Bus for communication. The command
1762 `secrets-show-secrets' offers a buffer with a visualization of the
1765 ** notifications.el provides an implementation of the Desktop
1766 Notifications API. It requires D-Bus for communication.
1768 ** soap-client.el supports access to SOAP web services from Emacs.
1769 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1771 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1773 ** New emacs-lock.el package.
1774 The previous version has been moved to obsolete/old-emacs-lock.el.
1775 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1776 against exiting Emacs and killing the buffer can be set separately.
1777 The mechanism for automatically turning off protection for buffers
1778 with dead inferior processes has been generalized.
1781 * Incompatible Lisp Changes in Emacs 24.1
1783 ** Passing a nil argument to a minor mode function call now ENABLES
1784 the minor mode unconditionally. This is so that you can write e.g.
1786 (add-hook 'text-mode-hook 'foo-mode)
1788 to enable foo-mode in Text mode buffers, removing the need for
1789 `turn-on-foo-mode' style functions. This affects all mode commands
1790 defined by `define-minor-mode'. If called interactively, the mode
1791 command still toggles the minor mode.
1793 ** The return value of `backup-buffer' has changed.
1794 It is now a list of three elements, where the second element is a list
1795 describing the original file's SELinux context. If Emacs or the
1796 system lacks SELinux support, the context list is (nil nil nil nil).
1797 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1799 ** `char-direction-table' and the `char-direction' function were deleted.
1800 They were buggy and inferior to the new support of bidirectional
1801 editing introduced in Emacs 24. If you need the bidirectional
1802 properties of a character, use `get-char-code-property' with the last
1803 argument `bidi-class'.
1805 ** `copy-directory' now copies the source directory as a subdirectory
1806 of the target directory, if the latter is an existing directory. The
1807 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1808 the contents directly into a pre-existing target directory.
1810 ** For mouse click input events in the text area, the Y pixel
1811 coordinate in the POSITION list now counts from the top of the text
1812 area, excluding any header line. Previously, it counted from the top
1815 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1816 been further reduced. Now a backquote not followed by a space is
1817 always treated as a "new-style" backquote. Please remove all
1818 "old-style" backquotes from your code. If your code uses backquotes
1819 as documented in the Elisp manual, and compiles without warning, then
1820 you have nothing to do in this regard. Code not following the
1821 appropriate conventions may fail to compile.
1823 The most common cause of trouble seems to be an old-style backquote
1824 followed by a newline. Another cause of trouble is vector notation
1825 for key sequence notation: instead of [(control ,)] and [(control ')],
1826 you should write [(control ?,)] and [(control ?')], which will work in
1829 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1830 was not advertised at the time. The function `custom-initialize-delay'
1831 replaced all known uses.
1833 ** `view-buffer' now treats special mode-class in the same way that
1834 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1835 major mode is special).
1837 ** Menu and tool bar changes
1839 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1840 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1841 With these alist entries omitted, `make-frame' checks the value of the
1842 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1843 a menu-bar or tool-bar, respectively. If the alist entries are added,
1844 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1846 *** The menu bar bindings's caches are not used any more.
1847 Use (where-is-internal <def> nil t) instead.
1849 ** Regions created by mouse dragging are now normal active regions,
1850 similar to those created by shift-selection (see Selection changes
1851 above). In previous Emacs versions, these regions were delineated by
1852 `mouse-drag-overlay'; that variable has been removed.
1854 ** The fourth argument of `filter-buffer-substring' has been removed.
1855 If you want to remove text properties from the final result, simply
1856 pass the result through substring-no-properties.
1858 ** cl.el no longer provides `cl-19'.
1860 ** The following obsolete functions and aliases have been removed
1861 (the appropriate new function is given in parentheses; "not needed"
1862 means you can just remove all calls to the function in question):
1864 *** `comint-kill-output' (`comint-delete-output')
1865 *** `decompose-composite-char' (`char-to-string')
1866 *** `outline-visible' (`outline-invisible-p')
1867 *** `internal-find-face' (`facep')
1868 *** `internal-get-face' (`facep and check-face')
1869 *** `frame-update-faces' (not needed)
1870 *** `frame-update-face-colors' (`frame-set-background-mode')
1871 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1872 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1873 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1874 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1875 *** `x-make-font-unbold' (`make-face-unbold')
1876 *** `x-make-font-unitalic' (`make-face-unitalic')
1877 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1878 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1879 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1880 *** `char-bytes' (== 1)
1881 *** `isearch-return-char' (`isearch-printing-char')
1882 *** `make-local-hook' (not needed)
1883 *** `set-screen-height' (`set-frame-height')
1884 *** `set-screen-width' (`set-frame-width')
1886 ** The following obsolete variables and varaliases have been removed
1887 (the appropriate new variable is given in parentheses):
1889 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1890 *** `vc-header-alist' (`vc-BACKEND-header')
1891 *** `directory-sep-char' (== ?/)
1892 *** `font-lock-defaults-alist' (`font-lock-defaults')
1893 *** `e' (`float-e').
1895 ** The following obsolete files were removed:
1896 sc.el, x-menu.el, rnews.el, rnewspost.el
1898 ** The format of the finder-inf.el file has changed, since the Finder
1899 mechanism is now based on the package system. The variable
1900 `finder-package-info' is replaced by `package--builtins' and
1901 `finder-keywords-hash'.
1903 ** When generating autoloads, `update-directory-autoloads' no longer
1904 assumes every inspected file is in your `load-path'. It instead
1905 generates relative names according to the current `load-path'.
1908 * Lisp changes in Emacs 24.1
1910 ** Code can now use lexical scoping by default instead of dynamic scoping.
1911 The `lexical-binding' variable enables lexical scoping for local
1912 variables. It is typically set via a file-local variable in the first
1913 line of the file, in which case it applies to all the code in that
1916 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1917 binding instead of the old dynamic binding mode.
1919 *** Lexically scoped interpreted functions are represented with a new form
1920 of function value which looks like (closure ENV ARGS &rest BODY).
1922 *** New macro `letrec' to define recursive local functions.
1924 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1925 So do `defcustom' and other forms that call `defvar' as a subroutine.
1927 *** New function `special-variable-p' to check whether a variable is
1928 declared as dynamically bound.
1930 *** The form ((lambda ...) ...) is deprecated.
1932 ** An Emacs Lisp testing tool is now included.
1933 Emacs Lisp developers can use this tool to write automated tests for
1934 their code. See the ERT info manual for details.
1936 ** Changes for bidirectional display and editing
1938 *** New function `current-bidi-paragraph-direction'.
1939 This returns the base direction of the paragraph at point.
1941 *** New function `bidi-string-mark-left-to-right'.
1942 Given a string containing characters from right-to-left scripts, this
1943 function returns another string which can be safely inserted into a
1944 buffer, such that any following text will be always displayed to the
1945 right of that string. (This works by appending an invisible Unicode
1946 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1948 This is useful when the buffer has overall left-to-right paragraph
1949 direction and you need to insert a string whose contents are not known
1950 in advance, without disrupting the layout of the line.
1954 *** Window tree functions are accessible in Elisp.
1955 Functions are provided to return the parent, siblings or child windows
1956 of any window including internal windows (windows not associated with a
1957 buffer) in the window tree.
1959 **** New function `window-valid-p' gives non-nil for live and internal
1962 **** Window manipulation can deal with internal windows.
1963 Many window handling functions like `split-window', `delete-window', or
1964 `delete-other-windows' as well as the window resizing functions can now
1965 act on any window including internal ones.
1967 *** window-total-height/-width vs window-body-height/-width.
1968 The function `window-height' has been renamed to `window-total-height'
1969 and `window-width' has been renamed to `window-body-width'. The old
1970 names are provided as aliases. Two new functions `window-total-width'
1971 and `window-body-height' are provided.
1973 *** Window parameters specific to window handling functions.
1974 For each window you can specify a parameter to override the default
1975 behavior of a number of functions like `split-window', `delete-window'
1976 and `delete-other-windows'. The variable `ignore-window-parameters'
1977 allows to ignore processing such parameters.
1979 *** New semantics of third argument of `split-window'.
1980 The third argument of `split-window' has been renamed to SIDE and can be
1981 set to any of the values 'below, 'right, 'above, or 'left to make the
1982 new window appear on the corresponding side of the window that shall be
1983 split. Any other value of SIDE will cause `split-window' to split the
1984 window into two side-by-side windows as before.
1986 *** Window resizing functions.
1987 A new standard function for resizing windows called `window-resize' has
1988 been introduced. This and all other functions for resizing windows no
1989 longer delete any windows when they become too small.
1991 *** Deleting the selected window now selects the most recently selected
1992 live window on that frame instead.
1994 *** `adjust-window-trailing-edge' adjustments.
1995 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1996 is able to resize other windows if a window adjacent to the trailing
1997 edge cannot be shrunk any more. This makes its behavior more similar to
1998 that of Emacs 21 without compromising, however, its inability to delete
1999 windows which was introduced in Emacs 22.
2001 *** Window-local buffer lists.
2002 Windows now have local buffer lists. This means that removing a buffer
2003 from display in a window will preferably show the buffer previously
2004 shown in that window with its previous window-start and window-point
2005 positions. This also means that the same buffer may be automatically
2006 shown twice even if it already appears in another window.
2008 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2009 which if non-nil requires the buffer to be displayed in the currently
2010 selected window, signaling an error otherwise. If nil, another window
2011 can be used, e.g. if the selected one is strongly dedicated.
2013 *** `split-window-vertically' and `split-window-horizontally' renamed
2014 to `split-window-below' and `split-window-right' respectively.
2015 The old names are kept as aliases.
2019 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2020 named ACTION, and takes a display action of the same form as
2021 `display-buffer-base-action' (see Changes, above). A non-nil,
2022 non-list value is treated specially, as the old meaning.
2024 **** New variable `display-buffer-overriding-action'.
2026 **** The procedure of `display-buffer' etc. to choose a window is
2027 determined by combining `display-buffer-overriding-action',
2028 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2029 and `display-buffer-fallback-action'. The second and fourth of these
2030 are user-customizable variables.
2032 See the docstring of `display-buffer' for details.
2034 *** New functions `window-state-get' and `window-state-put'.
2035 These functions allow to save and restore the state of an arbitrary
2036 frame or window as an Elisp object.
2040 *** New variable `completion-extra-properties' used to specify extra
2041 properties of the current completion:
2042 - :annotate-function, same as the old completion-annotate-function.
2043 - :exit-function, function to call after completion took place.
2045 *** Functions on `completion-at-point-functions' can return any of the
2046 properties valid for `completion-extra-properties'.
2048 *** `completion-annotate-function' is obsolete.
2050 *** New `metadata' method for completion tables. The metadata thus returned
2051 can specify various details of the data returned by `all-completions':
2052 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2053 used to select a style in completion-category-overrides.
2054 - `annotation-function' to add annotations in *Completions*.
2055 - `display-sort-function' to specify how to sort entries in *Completions*.
2056 - `cycle-sort-function' to specify how to sort entries when cycling.
2058 *** `minibuffer-local-filename-must-match-map' is not used any more.
2059 Instead, the bindings in `minibuffer-local-filename-completion-map'
2060 are combined with `minibuffer-local-must-match-map'.
2062 *** New variable `completing-read-function' allows overriding the
2063 behavior of `completing-read'.
2065 ** `glyphless-char-display' can now distinguish between graphical and
2066 text terminal display, via a char-table entry that is a cons cell.
2068 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2069 Instead, the offending function is removed.
2073 *** New function `run-hook-wrapped' for running an abnormal hook by
2074 passing the hook functions as arguments to a "wrapping" function.
2075 Like `run-hook-with-args-until-success', it stops at the first
2076 non-nil return value.
2078 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2079 set of "wrapping" filters, similar to around advice.
2080 (A version of this macro was actually added in Emacs 23.2 but was not
2081 advertised at the time.)
2085 *** New macro `condition-case-unless-debug' (this was actually added in
2086 Emacs 23.1 as condition-case-no-debug, but not advertised)
2088 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2090 *** Variable `stack-trace-on-error' removed.
2092 *** The debugger can now "continue" from an error, which means it will
2093 jump to the error handler as if the debugger had not been invoked
2094 instead of jumping all the way to the top-level.
2096 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2097 This can be useful when `inhibit-quit' is set.
2099 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2100 named Emacs server instances.
2102 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2103 to redirect STDOUT to a file.
2105 ** The function `format-time-string' now supports the %N directive,
2106 for higher-resolution time stamps.
2108 ** New input reading functions
2110 *** New function `read-char-choice' reads a restricted set of
2111 characters, discarding any inputs not inside the set.
2113 *** The command `read-color' now requires a match for a color name
2114 or RGB triplet, instead of signaling an error if the user provides
2117 **** `facemenu-read-color' is now an alias for `read-color'.
2119 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2120 The variable is now used to load all kind of supported dynamic libraries,
2121 not just image libraries. The previous name is still available as an
2124 ** Syntax parsing changes
2126 *** New variable `syntax-propertize-function'.
2127 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2128 This allows syntax-table properties to be set independently from font-lock:
2129 just call syntax-propertize to make sure the text is propertized.
2130 Together with this new variable come a new hook
2131 syntax-propertize-extend-region-functions, as well as two helper functions:
2132 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2133 as-is; and syntax-propertize-rules which provides a new way to specify
2136 *** Syntax tables support a new "comment style c" additionally to style b.
2138 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2140 ** frame-local variables cannot be let-bound any more.
2142 ** Major and minor mode changes
2144 *** `set-auto-mode' now respects mode: local variables at the end of files,
2145 as well as those in the -*- line.
2147 *** `prog-mode' is a new major mode from which programming modes
2150 **** `prog-mode-hook' can be used to enable features for programming
2151 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2152 on-the-fly spell checking for comments and strings.
2154 *** New hook `change-major-mode-after-body-hook', run by
2155 `run-mode-hooks' just before any other mode hooks.
2157 *** Enabled globalized minor modes can be disabled in specific major modes.
2158 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2159 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2161 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2163 ** File-handling changes
2165 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2166 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2167 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2168 argument is supplied (see Trash changes, above).
2170 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2172 ** Tool-bars can display separators.
2173 Tool-bar separators are handled like menu separators in menu-bar maps,
2174 i.e. via menu entries of the form `(menu-item "--")'.
2178 *** Animated images support (currently animated gifs only).
2180 **** `image-animated-p' returns non-nil if an image can be animated.
2182 **** `image-animate' animates a supplied image spec.
2184 **** `image-animate-timer' returns the timer object for an image that
2187 *** `image-extension-data' has been renamed to `image-metadata'.
2188 The old name is an obsolete alias to the new one.
2190 *** Image mode can view any image type that ImageMagick supports.
2191 This requires Emacs to be built with ImageMagick support.
2193 **** New function `imagemagick-types', defined if ImageMagick support
2194 is enabled, returns a list of image file extensions that your
2195 ImageMagick installation supports.
2197 **** New function `imagemagick-register-types' enables ImageMagick
2198 image types in Image mode and in `create-image' and other helper
2201 **** New option `imagemagick-types-inhibit' excludes certain
2202 ImageMagick image types from `imagemagick-register-types'.
2204 **** With ImageMagick support, there are extra Image mode commands to
2205 resize and rotate images: `image-transform-fit-to-height',
2206 `image-transform-fit-to-width', `image-transform-set-rotation', and
2207 `image-transform-set-scale'.
2209 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2210 passes it to the mail user agent function. This argument specifies an
2211 action for returning to the caller after finishing with the mail. For
2212 example, this is used by Rmail to optionally delete a mail window.
2214 ** XML and HTML parsing
2215 If Emacs is compiled with libxml2 support, there are two new
2216 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2217 and `libxml-parse-xml-region' (which parses XML). Both return an
2218 Emacs Lisp parse tree.
2220 ** Networking and encryption changes
2222 *** `open-network-stream' can now be used to open an encrypted stream.
2223 It now accepts an optional `:type' parameter for initiating a TLS
2224 connection, directly or via STARTTLS. To do STARTTLS, additional
2225 parameters (`:end-of-command', `:success', `:capabilities-command')
2226 must also be supplied.
2228 *** New library gnutls.el.
2229 The new function `gnutls-available-p' returns non-nil if Emacs is
2230 built with GnuTLS support. The main entry points are
2231 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2232 these functions through `open-network-stream', because that can
2233 upgrade connections through STARTTLS opportunistically or use plain
2234 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2237 *** New primitive `secure-hash' that supports many secure hash algorithms:
2238 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2239 sha1.el has been removed. The `sha1' feature is provided by default.
2243 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2245 ** Progress reporters can now "spin".
2246 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2247 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2248 time you call `progress-reporter-update' on that progress reporter,
2249 with a nil or omitted VALUE argument, the reporter message is
2250 displayed with a "spinning bar".
2252 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2253 being reverted, even if the buffer has a local `revert-buffer-function'.
2255 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2256 If delayed-warnings-list is non-nil, the command loop calls
2257 `delayed-warnings-hook' after `post-command-hook'. At present, this
2258 is only used by Emacs on some platforms to display warnings during
2259 startup, which might otherwise not be noticed. This uses the
2260 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2262 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2264 ** New function `make-composed-keymap' that constructs a new keymap
2265 from multiple input maps. You can use this to make a keymap that
2266 inherits from multiple maps, eg:
2267 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2269 ** New function `string-prefix-p'.
2270 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2272 ** New reader macro ## that stands for the empty symbol.
2273 This means that the empty symbol can now be read back. Also, #: by itself
2274 (when not immediately followed by a possible symbol character) stands for
2275 an empty uninterned symbol.
2277 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2279 ** The following functions and variables are obsolete:
2281 *** `tooltip-use-echo-area' is obsolete.
2282 Rather than setting this to t, disable Tooltip mode instead.
2284 *** buffer-substring-filters is obsolete.
2285 Use `filter-buffer-substring-functions' instead.
2287 *** `byte-compile-disable-print-circle' is obsolete.
2289 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2290 Use `post-command-hook' instead.
2292 *** `font-lock-maximum-size' is obsolete.
2295 * Changes in Emacs 24.1 on non-free operating systems
2297 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2298 and also when HOME is set to C:\ by default.
2300 ** New configure.bat options
2302 *** --enable-checking builds Emacs with extra runtime checks.
2304 *** --distfiles specifies files to be included in binary distribution.
2306 *** --without-gnutls disables automatic GnuTLS detection.
2308 *** --lib for general library linkage, works with the USER_LIBS build variable.
2310 ** New make target `dist' to create binary distribution for MS Windows.
2312 ** The Lisp function `w32-default-color-map' is now obsolete.
2313 (It is only used internally in the Emacs C code.)
2315 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2316 reappear on mouse-over. (Requires OS X 10.6 or later.)
2318 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2319 other platforms, rather than inserting its contents into the buffer.
2322 ----------------------------------------------------------------------
2323 This file is part of GNU Emacs.
2325 GNU Emacs is free software: you can redistribute it and/or modify
2326 it under the terms of the GNU General Public License as published by
2327 the Free Software Foundation, either version 3 of the License, or
2328 (at your option) any later version.
2330 GNU Emacs is distributed in the hope that it will be useful,
2331 but WITHOUT ANY WARRANTY; without even the implied warranty of
2332 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2333 GNU General Public License for more details.
2335 You should have received a copy of the GNU General Public License
2336 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2341 paragraph-separate: "[
\f]*$"