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'.
284 *** The calendars produced by cal-html include holidays.
285 Customize cal-html-holidays to change this.
289 *** CL's main entry is now (require 'cl-lib).
290 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
291 i.e. all its definitions have the "cl-" prefix (and internal definitions use
294 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
295 under the name `cl-foo' instead, with the exceptions of the few definitions
296 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
297 which have not been renamed to `cl-foo*' but just `cl-foo'.
299 The old `cl' is now deprecated and is just a bunch of aliases that
300 provide the old non-prefixed names.
302 *** `cl-flet' is not like `flet' (which is deprecated).
303 Instead it obeys the behavior of Common-Lisp's `flet'.
305 *** `cl-labels' is slightly different from `labels'.
306 The difference is that it relies on the `lexical-binding' machinery (as opposed
307 to the `lexical-let' machinery used previously) to capture definitions in
308 closures, so such closures will only work if `lexical-binding' is in use.
310 *** `progv' was rewritten to use the `let' machinery.
311 A side effect is that vars without corresponding value are bound to nil
312 rather than making them unbound.
316 *** New option `compilation-always-kill'.
320 *** `custom-reset-button-menu' now defaults to t.
322 *** Non-option variables are never matched in `customize-apropos' and
323 `customize-apropos-options' (i.e. the prefix argument does nothing for
328 *** `desktop-path' no longer includes the "." directory. Desktop
329 files are now located in ~/.emacs.d by default.
334 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
337 *** The D-Bus object manager interface is implemented.
340 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
341 if their value does not fit into Emacs's integer range.
344 *** The function `dbus-call-method' works non-blocking now, it can be
345 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
348 *** Signals can be sent also as unicast message.
351 *** The argument list of `dbus-register-signal' has been extended,
352 according to the new match rule types of D-Bus. See the manual for
356 *** `dbus-init-bus' supports private connections.
359 *** There is a new function `dbus-setenv'.
363 *** Changes are now highlighted using the same color scheme as in
364 modern VCSes. Deletions are displayed in red (new faces
365 `diff-refine-removed' and `smerge-refined-removed' and new definition
366 of `diff-removed'), insertions in green (new faces `diff-refine-added'
367 and `smerge-refined-added' and new definition of `diff-added').
369 *** The variable `diff-use-changed-face' defines whether to use the
370 face `diff-changed', or `diff-removed' and `diff-added' to highlight
371 changes in context diffs.
373 *** The new command `diff-remove-trailing-whitespace' fixes trailing
374 whitespace problems introduced by the diff.
378 *** `dired-do-async-shell-command' executes each file sequentially
379 if the command ends in `;' (when operating on multiple files).
380 Otherwise, it executes the command on each file in parallel.
382 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
383 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
386 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
387 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
388 mark/unmark/flag all files in the active region.
390 *** The minibuffer default for `=' (`dired-diff) has changed.
391 It is now the backup file for the file at point, if one exists.
392 In Transient Mark mode the default is the file at the active mark.
394 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
395 The global binding for `M-=', `count-words-region' is in effect.
397 ** Ediff now uses the same color scheme as Diff mode.
399 ** erc will look up server/channel names via auth-source and use the
400 channel keys found, if any.
402 ** Flymake uses fringe bitmaps to indicate errors and warnings.
403 See flymake-fringe-indicator-position, flymake-error-bitmap and
404 flymake-warning-bitmap.
408 *** The obsolete variable `follow-mode-off-hook' has been removed.
410 *** Follow mode no longer works by using advice.
411 The option `follow-intercept-processes' has been removed.
415 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
416 specifying URL types which should be converted to remote file names at
417 the FFAP prompt. The default is now '("ftp").
421 *** New `derived-mode' filter, bound to `/ M'.
422 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
424 ** Mouse Avoidance mode
426 The new variable `mouse-avoidance-banish-position' can now be used to
427 customize Mouse Avoidance mode further.
430 ** notifications.el supports now version 1.2 of the Notifications API.
431 The function `notifications-get-capabilities' returns the supported
434 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
435 closing brackets to be aligned with the line of the opening bracket.
437 ** In Proced mode, new command `proced-renice' renices marked processes.
441 A new version of python.el, which provides several new features, including:
442 per-buffer shells, better indentation, Python 3 support, and improved
443 shell-interaction compatible with iPython (and virtually any other
446 *** Some user options have been replaced/renamed:
447 Old defcustom: | New defcustom:
448 python-indent | python-indent-offset
449 python-guess-indent | python-indent-guess-indent-offset
450 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
451 python-use-skeletons | python-skeleton-autoinsert
453 *** Some user options have been removed:
455 **** `python-indent-string-contents': Strings are never indented.
457 **** `python-honour-comment-indentation':
458 Comments are never considered as indentation markers themselves.
460 **** `python-continuation-offset': Indentation is automatically
461 calculated in a pep8 compliant way depending on the context.
463 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
464 Have no direct mapping as the shell interaction is completely different.
466 **** `python-python-command', `python-jython-command':
467 Replaced by `python-shell-interpreter'.
469 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
470 `python-pdbtrack-minor-mode-string', `python-source-modes':
473 *** Some commands have been replaced:
474 Old command | New command
475 python-insert-class | python-skeleton-class
476 python-insert-def | python-skeleton-def
477 python-insert-for | python-skeleton-for
478 python-insert-if | python-skeleton-if
479 python-insert-try/except | python-skeleton-try
480 python-insert-try/finally | python-skeleton-try
481 python-insert-while | python-skeleton-while
482 python-find-function | python-nav-jump-to-defun
483 python-next-statement | python-nav-forward-sentence
484 python-previous-statement | python-nav-backward-sentence
485 python-send-buffer | python-shell-send-buffer
486 python-send-defun | python-shell-send-defun
487 python-send-region | python-shell-send-region
488 python-send-region-and-go | Emulate with python-shell-send-region and
489 python-shell-switch-to-shell
490 python-send-string | python-shell-send-string
491 python-switch-to-python | python-shell-switch-to-shell
492 python-describe-symbol | python-eldoc-at-point
494 ** reStructuredText mode
496 *** Rebind nearly all keys making room for more keys and complying
497 better to usage in other modes. Describe bindings with C-c C-h.
499 *** Major revision of indentation working very similar to other
500 modes. TAB is your friend.
502 *** Major revision of filling working fine with most of
503 reStructuredText syntax. Support auto-filling.
505 *** Major revision of comment handling.
507 *** Major revision of fontification working with `jit-lock-mode'.
509 *** Cover reStructuredText syntax more closely. Improve
510 the experience for Sphinx users.
512 *** `rst-insert-list' inserts new list or continues existing lists.
514 *** Extend correct and improve customization.
516 *** Negative prefix argument always works for `rst-adjust'.
518 *** Reset window configuration after displaying TOC.
520 *** Package version in `rst-version'.
522 *** Support `imenu' and `which-func'.
526 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
528 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
530 *** `sh-use-smie' lets you choose a new indentation and navigation code.
534 *** New option `async-shell-command-buffer' specifies what buffer to use
535 for a new asynchronous shell command when the default output buffer
536 `*Async Shell Command*' is already taken by another running command.
540 *** DB2 added `sql-db2-escape-newlines'
542 If non-nil, newlines sent to the command interpreter will be escaped
543 by a backslash. The default does not escape the newlines and assumes
544 that the sql statement will be terminated by a semicolon.
546 ** Tabulated List and packages derived from it
548 *** New command `tabulated-list-sort', bound to `S', sorts the column
549 at point, or the Nth column if a numeric prefix argument is given.
553 The variables `term-default-fg-color' and `term-default-bg-color' are
554 now deprecated in favor of the `term-face' face, that you can
555 customize. Also, it is now possible to customize how are displayed the
556 ANSI terminal colors and styles by customizing the corresponding
557 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
562 *** The syntax has been extended in order to allow ad-hoc proxy
563 definitions. See the manual for details.
565 *** Remote processes are now supported also on remote Windows host.
569 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
570 Previously, this slot stored semicolon-separated attribute-value pairs
571 appended to some imap URLs, but this is not compatible with RFC 3986.
572 So now the `filename' slot stores the entire path and query components
573 and the `attributes' slot is always nil.
575 *** New function `url-encode-url' for encoding a URI string.
576 The `url-retrieve' function now uses this to encode its URL argument,
577 in case that is not properly encoded.
581 *** The free software compiler GHDL is supported (and now the default).
583 *** Support for the VHDL-AMS packages has been added/updated.
585 *** Updated to the 2002 revision of the VHDL standard.
587 *** Accepts \r and \f as whitespace.
589 ** which-function-mode now applies to all applicable major modes by default.
592 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
595 ** FIXME something happened to ses.el, 2012-04-17.
598 ** Obsolete packages:
601 In most cases, assoc+member+push+delq work just as well.
602 And in any case it's just a terrible package: ugly semantics, terrible
603 inefficiency, and not namespace-clean.
618 * New Modes and Packages in Emacs 24.3
620 * Incompatible Lisp Changes in Emacs 24.3
622 ** set-buffer-multibyte now signals an error in narrowed buffers.
625 ** (random) by default now returns a different random sequence in
626 every Emacs run. Use (random S), where S is a string, to set the
627 random seed to a value based on S, in order to get a repeatable
628 sequence in later calls.
631 ** The function `x-select-font' can return a font spec, instead of a
632 font name as a string. Whether it returns a font spec or a font name
633 depends on the graphical library.
635 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
636 that substring is inserted literally even if the LITERAL arg is
637 non-nil, instead of causing an error to be signaled.
640 ** Docstrings starting with `*' no longer indicate user options.
641 Only variables defined using `defcustom' are considered user options.
642 The function `user-variable-p' is now an obsolete alias for
646 ** The return values of `defalias', `defun' and `defmacro' have changed,
647 and are now undefined. For backwards compatibility, defun and
648 defmacro currently return the name of the newly defined function/macro
649 but this should not be relied upon.
652 ** `face-spec-set' no longer sets frame-specific attributes when the
653 third argument is a frame (that usage was obsolete since Emacs 22.2).
656 ** The arguments of `dbus-register-signal' are no longer just strings,
657 but keywords or keyword-string pairs. The old argument list will
658 still be supported for Emacs 24.x.
661 Some Lisp symbols have been renamed to avoid problems with spelling
662 that is incorrect or inconsistent with how Emacs normally spells a word.
664 *** Renamed functions
666 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
667 **** inactivate-input-method -> deactivate-input-method
668 **** quail-inactivate -> quail-deactivate
669 **** robin-inactivate -> robin-deactivate
670 **** viper-inactivate-input-method -> viper-deactivate-input-method
671 **** viper-inactivate-input-method-action ->
672 viper-deactivate-input-method-action
673 **** ucs-input-inactivate -> ucs-input-deactivate
676 The old hooks are still supported for backward compatibility, but they
677 are deprecated and will be removed eventually.
679 **** input-method-inactivate-hook -> input-method-deactivate-hook
680 **** robin-inactivate-hook -> robin-deactivate-hook
681 **** quail-inactivate-hook -> quail-deactivate-hook
683 *** Renamed Lisp variables
685 **** follow-deactive-menu -> follow-inactive-menu
686 **** inactivate-current-input-method-function ->
687 deactivate-current-input-method-function
689 ** Some obsolete functions, variables, and faces were removed:
691 *** `facemenu-unlisted-faces'
692 *** `rmail-decode-mime-charset'
693 *** `last-input-char', `last-command-char', `unread-command-char'.
694 *** `iswitchb-read-buffer'
695 *** `sc-version', `sc-submit-bug-report'
696 *** `set-char-table-default'
697 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
698 *** `compile-internal'
699 *** `mode-line-inverse-video'
700 *** `cvs-commit-buffer-require-final-newline'
701 (use `'log-edit-require-final-newline'instead)
702 *** `cvs-changelog-full-paragraphs'
703 (use `log-edit-changelog-full-paragraphs' instead)
704 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
705 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
706 *** `vc-master-templates' (use `vc-handled-backends' instead)
707 *** `vc-checkout-carefully'
711 * Lisp changes in Emacs 24.3
713 ** New sampling-based Elisp profiler.
714 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
715 The sampling rate can be based on CPU time (only supported on some
716 systems), or based on memory allocations.
718 ** CL-style generalized variables are now in core Elisp.
719 `setf' is autoloaded; `push' and `pop' accept generalized variables.
721 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
722 The interpretation of the DECLS is determined by `defun-declarations-alist'.
726 *** New function `completion-table-with-quoting' to handle completion
727 in the presence of quoting, such as file completion in shell buffers.
729 *** New function `completion-table-subvert' to use an existing completion
730 table, but with a different prefix.
734 *** New error type and new function `user-error'.
735 These do not trigger the debugger.
737 *** New option `debugger-bury-or-kill'.
739 *** Set `debug-on-message' to enter the debugger when a certain
740 message is displayed in the echo area. This can be useful when trying
741 to work out which code is doing something.
743 *** New var `inhibit-debugger', automatically set to prevent accidental
744 recursive invocations.
748 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
749 of `read-regexp' accepts a string ending with a colon and space, and its
750 second argument DEFAULTS can be a list of strings accessible via M-n
751 in the minibuffer ahead of other hard-coded useful regexp-related values.
752 More commands use `read-regexp' now to read their regexp arguments.
756 *** The functions get-lru-window, get-mru-window and get-largest-window
757 now accept a third argument to avoid choosing the selected window.
759 *** Additional values recognized for option `window-combination-limit'.
761 *** New macro `with-temp-buffer-window'.
763 *** `temp-buffer-resize-mode' no longer resizes windows that have been
766 *** New function `fit-frame-to-buffer' and new options
767 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
769 *** New display action functions `display-buffer-below-selected',
770 `display-buffer-at-bottom' and `display-buffer-in-previous-window'.
772 *** New display action alist entry `inhibit-switch-frame', if non-nil,
773 tells display action functions to avoid changing which frame is
776 *** New display action alist entry `pop-up-frame-parameters', if
777 non-nil, specifies frame parameters to give any newly-created frame.
779 *** New display action alist entry `previous-window', if non-nil,
780 specifies window to reuse in `display-buffer-in-previous-window'.
782 *** New display action alist entries `window-height' and `window-width'
783 to specify size of new window created by `display-buffer'.
785 *** The following variables are obsolete, as they can be replaced by
786 appropriate entries in the `display-buffer-alist' function introduced
789 **** `display-buffer-reuse-frames'
790 **** `special-display-regexps'
791 **** `special-display-frame-alist'
792 **** `special-display-buffer-names'
793 **** `special-display-function'
794 **** `display-buffer-function'
795 **** `dired-shrink-to-fit'
799 *** `current-time-string' no longer requires that its argument's year
800 must be in the range 1000..9999. It now works with any year supported
801 by the underlying C implementation.
803 *** `current-time' now returns extended-format time stamps
804 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
805 PSEC is typically a multiple of 1000 on current machines. Other
806 functions that use this format, such as file-attributes and
807 format-time-string, have been changed accordingly. Old-format time
808 stamps are still accepted.
810 *** The format of timers in timer-list and timer-idle-list is now
811 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
812 The PSECS slot is new, and uses picosecond resolution. It can be
813 accessed via the new timer--psecs accessor.
816 ** Floating point functions now always return special values like NaN,
817 instead of signaling errors, if given invalid args, e.g. (log -1.0).
818 Previously, they returned NaNs on some platforms but signaled errors
819 on others. The affected functions are acos, asin, tan, exp, expt,
820 log, log10, sqrt, and mod.
822 ** Interpreted files are eagerly macro-expanded during load.
823 This can significantly speed up execution of non-byte-compiled code,
824 but can also bump into harmless and previously unnoticed cyclic
825 dependencies. These should not be fatal: they will simply cause the
826 macro-calls to be left for later expansion (as before), but will also
827 result in a warning ("Eager macro-expansion skipped due to cycle")
828 describing the cycle.
830 ** Misc new functions:
833 *** `autoload-do-load'.
835 *** `buffer-narrowed-p' tests if the buffer is narrowed.
836 *** `file-name-base' returns a file name sans directory and extension.
837 *** `function-get' fetches a function property, following aliases.
839 *** `posnp' tests if an object is a `posn'.
840 *** `set-temporary-overlay-map' sets up a temporary overlay map.
842 *** `system-users' returns the user names on the system.
844 *** `system-groups' returns the group names on the system.
845 *** `tty-top-frame' returns the topmost frame of a text terminal.
847 ** New macros `setq-local' and `defvar-local'.
849 ** New fringe bitmap `exclamation-mark'.
851 ** Face underlining can now use a wave.
852 See the "Face Attributes" section of the Elisp manual.
854 ** The following functions and variables are obsolete:
856 *** `automount-dir-prefix'
857 *** `buffer-has-markers-at'
858 *** `macro-declaration-function' (use `macro-declarations-alist').
859 *** `window-system-version'
860 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
863 * Changes in Emacs 24.3 on non-free operating systems
865 ** New configure.bat options on MS-Windows:
867 *** --without-libxml2 omits support for libxml2, even if its presence
870 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
871 Emacs now supports mouse highlight, help-echo (in the echo area), and
872 mouse-autoselect-window.
874 ** On MS-Windows Vista and later Emacs now supports symbolic links.
876 * Changes in Emacs 24.2
878 ** This is mainly a bug-fix release.
881 * Installation Changes in Emacs 24.1
883 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
884 to configure. Note that other libraries used by Emacs, RSVG and GConf,
885 also depend on Gtk+. You can disable them with --without-rsvg and
888 ** Emacs can be compiled with GnuTLS support.
889 This happens by default if a suitably recent version of the library is
890 found at build time. To prevent this, use the configure option
891 `--without-gnutls'. See below for GnuTLS features.
893 ** Emacs can be compiled with SELinux support.
894 This happens by default if a suitably recent version of the library is
895 found at build time. To prevent this, use the configure option
896 `--without-selinux'. See below for SELinux features.
898 ** Emacs can be compiled with ImageMagick support.
899 This happens by default if a suitably recent version of the library is
900 found at build time. To prevent this, use the configure option
901 `--without-imagemagick'. See below for ImageMagick features.
902 This feature is not available for the Nextstep or MS ports.
904 ** Emacs can be compiled with libxml2 support.
905 This happens by default if a suitably recent version of the library is
906 found at build time. To prevent this, use the configure option
907 `--without-xml2'. See below for libxml2 features.
909 ** By default, the installed Info and man pages are compressed.
910 You can disable this by configuring --without-compress-info.
912 ** New configure option --with-wide-int.
913 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
914 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
917 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
918 These provide no new functionality, they just remove the need to edit
919 lib-src/Makefile by hand in order to use the associated features.
921 ** New configure option --enable-use-lisp-union-type.
922 This is only useful for Emacs developers to debug certain types of bugs.
923 This is not a new feature; only the configure flag is new.
925 ** The standalone programs digest-doc and sorted-doc are removed.
926 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
928 ** The standalone program `fakemail' is removed.
929 If you need it, feedmail.el provides a superset of the functionality.
932 * Startup Changes in Emacs 24.1
934 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
935 command line arguments, and the EMACS_UNIBYTE environment variable, no
936 longer have any effect. (They were declared obsolete in Emacs 23.)
938 ** New command line option `--no-site-lisp' removes site-lisp directories
939 from load-path. -Q now implies this. This option does not affect the
940 EMACSLOADPATH environment variable (and hence has no effect for
944 * Changes in Emacs 24.1
948 *** Many packages now use the `completion-at-point' command,
949 rather than implementing separate completion commands.
951 *** `completion-at-point' now handles tags and semantic completion.
953 *** Completion in a non-minibuffer now tries to detect the end of completion
954 and pops down the *Completions* buffer accordingly.
956 *** New option `completion-cycle-threshold' allows completion cycling.
958 *** New option `completion-category-overrides' for overriding the
959 default completion style in certain circumstances.
961 *** New completion style `substring'.
963 *** Completion of buffer names uses `substring' completion by default.
965 *** The option `widget-complete-field' has been removed.
969 *** The first time you try sending mail, Emacs asks for a mail method.
970 This is implemented by a new default for `send-mail-function', which
971 is `sendmail-query-once'. This offers to use the smtpmail package, or
972 to use the old defaults relying on external mail facilities
973 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
974 `mailclient-send-it' on Windows).
976 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
977 the report to your desktop's preferred mail client, if there is one.
978 This uses either the "xdg-email" utility, or Mac OS's "open" command.
980 *** See Changes in Specialized Modes and Packages for SMTPmail changes
981 and Mail mode changes
983 ** Emacs server and client changes
985 *** New option `server-port' specifies the port for TCP Emacs servers.
987 *** New emacsclient argument -q/--quiet suppresses some status messages.
989 *** New emacsclient argument --frame-parameters specifies the frame
990 parameters of any newly-created graphical frame.
992 *** If emacsclient shuts down due to Emacs signaling an error,
993 its exit status is 1.
995 *** New emacsclient argument --parent-id ID.
996 This opens a client frame in parent X window ID, via XEmbed, similar
997 to the --parent-id argument to Emacs.
999 ** Internationalization changes
1001 *** Emacs now supports display and editing of bidirectional text.
1002 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1003 displayed in the correct visual order as expected by users of those
1004 scripts. The display reordering is a "full bidirectionality" class
1005 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1006 with no RTL text should look exactly the same as before.
1008 **** New buffer-local variable `bidi-display-reordering'.
1009 To disable display reordering in a buffer, change this to nil.
1011 **** New buffer-local variable `bidi-paragraph-direction'.
1012 If nil (the default), Emacs determines the base direction of each
1013 paragraph from its text, as specified by the UBA. Setting the value
1014 to `right-to-left' or `left-to-right' forces a base direction on each
1017 Paragraphs with right-to-left base direction are displayed starting at
1018 the right window edge.
1020 *** Enhanced support for characters with no glyphs in available fonts,
1021 or, on text terminals, characters that cannot be encoded by the
1022 terminal coding system. The new option `glyphless-char-display-control'
1023 specifies how to display them: as a hexadecimal code in a box, a thin
1024 1-pixel space, an empty box, etc.
1026 *** New input methods for Farsi and Bulgarian
1027 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1029 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1030 (U+2010 and U+2011).
1032 *** New Hebrew translation of the Emacs Tutorial.
1033 Type `C-u C-h t' to choose it in case your language setup doesn't
1034 automatically select it.
1036 ** An Emacs Lisp package manager is now included.
1037 This is a convenient way to download and install additional packages,
1038 from a package repository at http://elpa.gnu.org.
1040 *** M-x list-packages shows a list of packages, which can be
1041 selected for installation.
1043 *** New command `describe-package', bound to `C-h P'.
1045 *** By default, all installed packages are loaded automatically when
1046 Emacs starts up. To disable this, set `package-enable-at-startup' to
1047 nil. To specify the packages to load, customize `package-load-list'.
1049 ** Custom theme changes
1051 *** New command `M-x customize-themes', which provides a convenient
1052 interface for enabling and disabling Custom themes.
1054 *** New option `custom-theme-load-path' is the load path for themes.
1055 Emacs no longer looks for Custom themes in `load-path'. The default
1056 value of `custom-theme-load-path' says to look for themes in
1057 `custom-theme-directory', followed by a subdirectory of
1058 `data-directory' named "themes/", which contains a small selection of
1059 built-in Custom themes.
1061 *** New option `custom-safe-themes' records known-safe theme files.
1062 If a theme is not in this list, Emacs queries before loading it, and
1063 offers to save the theme to `custom-safe-themes' automatically. By
1064 default, all themes included in Emacs are treated as safe.
1066 ** Improved GTK integration
1068 *** GTK scroll-bars are now placed on the right by default.
1069 The function `set-scroll-bar-mode' can change this.
1071 *** GTK tool bars can have just text, just images or images and text.
1072 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1073 the default is taken from desktop settings.
1075 *** GTK tool bars can be placed on any edge of the frame.
1076 The frame-parameter tool-bar-position controls this. It takes the
1077 values top, left, right or bottom. The Options => Show/Hide menu has
1080 *** The default colors for selected text (the `region' face) are taken
1081 from the GTK theme when Emacs is built with GTK.
1083 *** Emacs uses GTK tooltips by default if built with GTK.
1084 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1086 ** Graphical interface changes
1088 *** On graphical displays, the mode-line no longer ends in dashes.
1089 Also, the first dash (which does not indicate anything) is just
1090 displayed as a space.
1092 *** `menu-bar-select-buffer-function' lets you choose another operation
1093 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1095 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1096 built with Xft. These fonts can be set via X resources, for example:
1097 Emacs.pane.menubar.font: Courier-12
1101 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1102 or if it receives a SIGINT signal in batch mode.
1104 *** `kill-emacs-hook' is now also run in batch mode.
1105 Third-party code which adds to `kill-emacs-hook' should check if they
1106 do the right thing in batch mode.
1108 ** Scrolling changes
1110 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1111 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1112 of buffer at first key-press (instead they move to top/bottom of buffer)
1113 when `scroll-error-top-bottom' is non-nil.
1115 *** New option `scroll-error-top-bottom' (see above).
1117 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1118 scroll a line instead of full screen.
1120 *** New property `scroll-command' should be set on a command's symbol to
1121 define it as a scroll command affected by `scroll-preserve-screen-position'.
1123 *** If you customize `scroll-conservatively' to a value greater than 100,
1124 Emacs will never recenter point in the window when it scrolls due to
1125 cursor motion commands or commands that move point (e.f., `M-g M-g').
1126 Previously, you needed to use `most-positive-fixnum' as the value of
1127 `scroll-conservatively' to achieve the same effect.
1129 *** "Aggressive" scrolling now honors the scroll margins.
1130 If you customize `scroll-up-aggressively' or
1131 `scroll-down-aggressively' and move point off the window, Emacs now
1132 scrolls the window so as to avoid positioning point inside the scroll
1135 ** Basic SELinux support has been added.
1136 This requires Emacs to be linked with libselinux at build time.
1138 *** Emacs preserves the SELinux file context when backing up.
1139 Also, the function `copy-file' has an extra optional argument for
1140 preserving SELinux context, and the return value of `backup-buffer'
1141 now includes the SELinux context.
1143 *** New functions `file-selinux-context' and `set-file-selinux-context'
1144 get and set the SELinux context of a file.
1148 *** `delete-by-moving-to-trash' now only affects commands that specify
1149 trashing. This avoids inadvertently trashing temporary files.
1151 *** Calling `delete-file' or `delete-directory' with a prefix argument
1152 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1154 ** File- and directory-local variable changes
1156 *** You can stop directory local vars from applying to subdirectories.
1157 Add an element (subdirs . nil) to the alist portion of any variables
1158 settings to indicate that the section should not apply to
1161 *** Directory local variables can apply to some file-less buffers.
1162 Affected modes include dired, vc-dir, and log-edit. For example,
1163 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1164 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1165 `hack-dir-local-variables-non-file-buffer' to support this.
1167 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1168 Instead, use "eval: (minor-mode 1)".
1170 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1171 to `inhibit-local-variables-regexps'. As the name suggests, it now
1172 applies to ALL file local variables, not just -*- lines. The
1173 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1178 *** The `quit-window' command now restores the last buffer displayed
1179 in the quitted window.
1181 *** Resizing an Emacs frame now preserves proportional window sizes,
1182 modulo restrictions like window minimum sizes and fixed-size windows.
1184 *** The behavior of `display-buffer' is now customizable in detail.
1186 **** New option `display-buffer-base-action' specifies a list of
1187 user-determined display "actions" (functions and optional arguments
1188 for choosing the displaying window).
1190 This takes precedence over the default display action, which is
1191 specified by `display-buffer-fallback-action'.
1193 **** New option `display-buffer-alist' maps buffer name regexps to
1194 display actions, taking precedence over `display-buffer-base-action'.
1196 *** New option `window-combination-limit'.
1197 The new option `window-combination-limit' allows to return the space
1198 obtained for resizing or creating a window more reliably to the window
1199 from which such space was obtained.
1201 *** New option `window-combination-resize'.
1202 The new option `window-combination-resize' allows to split a window that
1203 otherwise cannot be split because it's too small by stealing space from
1204 other windows in the same combination. Subsequent resizing or deletion
1205 of the window will resize all windows in the same combination as well.
1207 *** New option `frame-auto-hide-function' lets you choose between
1208 iconifying or deleting a frame when burying a buffer in a dedicated
1209 frame, or quitting a window showing a buffer in a frame of its own.
1211 *** New commands `maximize-window' and `minimize-window'.
1212 These maximize and minimize the size of a window within its frame.
1214 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1215 These functions allow to navigate through the live buffers that have
1216 been shown in a specific window.
1218 ** Minibuffer changes
1220 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1221 This is handy for minibuffer-only frames, and is also used for the feature
1222 where mouse-1 pops up *Messages*"', which can now easily be changed.
1224 *** Minibuffers set `truncate-lines' to nil.
1225 If you want to change the value to something else, you could use
1226 for example `minibuffer-setup-hook'.
1228 ** `auto-mode-case-fold' is now enabled by default.
1230 ** `backup-by-copying-when-mismatch' now defaults to t.
1232 ** New basic faces `error', `warning', `success'.
1233 These are used to highlight text indicating failure, caution or
1234 successful operation.
1236 ** New option `list-colors-sort' defines the color sort order
1237 for `list-colors-display'.
1239 ** The variable `focus-follows-mouse' now always defaults to nil.
1242 * Editing Changes in Emacs 24.1
1246 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1247 `isearch-yank-line'.
1249 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1250 `isearch-yank-kill'.
1252 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1254 ** New commands `count-words-region' and `count-words'.
1256 *** M-= is bound to `count-words-region', not `count-lines-region'.
1257 The `count-words-region' command, when called interactively, reports
1258 the number of lines, words, and characters in the region. It is a
1259 superset of the old `count-lines-region', which is now an obsolete
1262 ** The command `just-one-space' (M-SPC), if given a negative argument,
1263 also deletes newlines around point.
1267 *** New option `delete-active-region'.
1268 If non-nil, [delete] and DEL delete the region if it is active and no
1269 prefix argument is given. If set to `kill', those commands kill
1272 *** New command `delete-forward-char', bound to [delete].
1273 This is meant for interactive use, and obeys `delete-active-region'.
1274 The command `delete-char' does not obey `delete-active-region'.
1276 *** `delete-backward-char' is now a Lisp function.
1277 Apart from obeying `delete-active-region', its behavior is unchanged.
1278 However, the byte compiler now warns if it is called from Lisp; Lisp
1279 callers should use delete-char with a negative argument instead.
1281 *** The option `mouse-region-delete-keys' has been deleted.
1283 ** Selection changes.
1285 The default handling of clipboard and primary selections has been
1286 changed to conform with modern X applications. In short, most
1287 commands for killing and yanking text now use the clipboard, while
1288 mouse commands use the primary selection.
1290 In the following, we provide a list of these changes, followed by a
1291 list of steps to get the old behavior back if you prefer that.
1293 *** `select-active-regions' now defaults to t.
1294 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1295 the kill ring. The selected text is put in the primary selection, if
1296 the system possesses a separate primary selection facility (e.g. X).
1298 **** `select-active-regions' also accepts a new value, `only'.
1299 This means to only set the primary selection for temporarily active
1300 regions (usually made by mouse-dragging or shift-selection);
1301 "ordinary" active regions, such as those made with C-SPC followed by
1302 point motion, do not alter the primary selection.
1304 **** `mouse-drag-copy-region' now defaults to nil.
1306 *** mouse-2 is now bound to `mouse-yank-primary'.
1307 This pastes from the primary selection, ignoring the kill-ring.
1308 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1310 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1312 *** `x-select-enable-primary' now defaults to nil.
1313 Thus, commands that kill text or copy it to the kill-ring (such as
1314 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1316 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1317 exactly equivalent to M-w, C-w, and C-y respectively.
1319 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1320 non-nil by default, as Windows does not support the primary selection
1321 between applications.
1323 *** To return to the previous behavior, do the following:
1325 **** Change `select-active-regions' to nil.
1326 **** Change `mouse-drag-copy-region' to t.
1327 **** Change `x-select-enable-primary' to t (on X only).
1328 **** Change `x-select-enable-clipboard' to nil.
1329 **** Bind `mouse-yank-at-click' to mouse-2.
1331 *** Support for X cut buffers has been removed.
1333 *** X clipboard managers are now supported.
1334 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1336 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1337 in the current rectangle. With a prefix argument, this prompts for a
1338 number to count from and for a format string.
1340 ** `redisplay-dont-pause' now defaults to t.
1341 This makes Emacs feel more responsive to editing commands that arrive
1342 at high rate, e.g. if you lean on some key, because stopping redisplay
1343 in the middle (when this variable is nil) forces more expensive
1344 updates later on, and Emacs appears to be unable to keep up.
1346 ** The behavior of <TAB> for active regions in Text mode has changed.
1347 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1348 when the region is active causes Emacs to indent all the lines in the
1349 region, aligning them with the line previous to the first line in the
1350 region (or with the left margin if there is no previous line).
1352 ** When `occur' is called with a prefix argument, matching strings are
1353 collected into the `*Occur*' buffer without line numbers. If there
1354 are parenthesized subexpressions in the specified regexp, `occur'
1355 reads replacement text that may contain \\& and \\N whose convention
1356 follows `replace-match'.
1359 * Changes in Specialized Modes and Packages in Emacs 24.1
1361 ** Archive Mode has basic support for browsing and updating 7z archives.
1365 *** BibTeX mode now supports biblatex.
1366 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1367 `bibtex-entry-field-alist' is now an obsolete alias for
1368 `bibtex-BibTeX-entry-alist'.
1370 *** New command `bibtex-search-entries', bound to C-c C-a.
1372 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1374 *** New variable `bibtex-search-entry-globally'.
1378 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1380 *** The default browser used by the package is now the "xdg-open" program,
1381 on platforms that support it. This calls your desktop's preferred browser.
1383 ** Calendar, Diary, and Appt
1385 *** Diary entries can contain non-printing "comments".
1386 See the variable `diary-comment-start'.
1388 *** Appointments can specify their individual warning times.
1389 See the variable `appt-warning-time-regexp'.
1391 *** The function specified by `appt-disp-window-function' may be passed
1392 lists of arguments if multiple appointments are due at similar times.
1393 If you are using a custom function for this, you should update it.
1395 *** New function `diary-hebrew-birthday'.
1397 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1398 may no longer be nil, but must all be strings.
1400 *** The obsolete (since Emacs 22.1) method of enabling the appt
1401 package by adding `appt-make-list' to `diary-hook' has been removed.
1402 Use `appt-activate' instead.
1404 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1405 appt-issue-message (use the function appt-activate)
1406 appt-visible/appt-msg-window (use the variable appt-display-format)
1408 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1409 view-diary-entries, list-diary-entries, show-all-diary-entries
1413 *** New feature to "guess" the style in an existing buffer.
1414 The main entry point is M-x c-guess.
1416 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1418 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1419 Thus C-M-a will, by default, go to the beginning of the immediate function,
1422 *** "Macros with semicolons" can be registered for correct indentation.
1423 Where such a macro ends a line (no semicolon) the next statement is no longer
1424 parsed as a statement continuation.
1426 ** Comint and modes derived from it use the standard completion code.
1430 *** Compilation mode can be used without Font Lock mode.
1431 `compilation-parse-errors-function' is now obsolete.
1433 *** New variable `compilation-filter-start', which is bound while
1434 `compilation-filter-hook' runs. It records the start position of the
1435 text inserted by `compilation-filter'.
1437 *** `compilation-error-screen-columns' and `compilation-first-column'
1438 are obeyed in the editing buffer. So programming language modes can
1439 set them, whereas previously only the value in the *Compilation*
1444 *** Customize buffers now contain a search field.
1445 The search is performed using `customize-apropos'.
1446 To turn off the search field, set `custom-search-field' to nil.
1448 *** Options in customize group buffers start out hidden if not customized.
1449 Use the arrow to the left of the option name to toggle visibility.
1451 *** custom-buffer-sort-alphabetically now defaults to t.
1453 *** The color widget now has a "Choose" button, which allows you to
1454 choose a color via `list-colors-display'.
1458 *** It is now possible to access buses other than the default system
1461 *** The `dbus-register-method' and `dbus-register-property' functions
1462 optionally do not register names.
1464 *** The new function `dbus-register-service' registers a known service
1465 name on a D-Bus without also registering a property or a method.
1469 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1470 if called with a prefix argument, read a file name from the minibuffer
1471 instead of using the current buffer.
1473 *** The "dired local variables" feature of Dired-x is obsolete.
1474 The standard directory local variables feature replaces it.
1478 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1479 controlling attempts to autojoin a channel.
1481 *** New variable `erc-coding-system-precedence': If we use `undecided'
1482 as the server coding system, this variable will then be consulted.
1483 The default is to decode strings that can be decoded as utf-8 as
1484 utf-8, and do the normal `undecided' decoding for the rest.
1488 *** The default value of `eshell-directory-name' has changed
1489 to be an "eshell" directory in `user-emacs-directory'.
1490 The old "~/.eshell/" directory is still used if it exists, though.
1494 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1495 It now supports multithread non-stop debugging and simultaneous
1496 debugging of several threads.
1500 *** RET (`image-toggle-animation') toggles animation, if applicable.
1501 Animation plays once, unless the option `image-animate-loop' is non-nil.
1505 *** New command M-x info-display-manual displays a named Info manual.
1506 If that manual is already visited in some Info buffer, it displays
1507 that buffer. (This is handy if you have many manuals in many *info*
1508 buffers, and don't remember the name of the buffer visiting the manual
1509 you want to consult.) Otherwise, it loads and displays the manual.
1511 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1512 This is for compatibility with the stand-alone Info reader program,
1513 and also because `Info-edit' is a rarely used command that is disabled
1516 ** Mail mode changes (not Message mode)
1518 *** New command M-x mail-add-attachment for adding MIME attachments
1520 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1521 (Its name is misleading, since it has nothing to do with MIME
1522 attachments.) The old name is now an obsolete alias to the new name.
1524 ** MH-E has been updated to MH-E version 8.3.1.
1525 See MH-E-NEWS for details.
1527 ** Modula-2 mode provides auto-indentation.
1529 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1531 ** nXML mode no longer binds C-RET to `nxml-complete'.
1532 Completion is now performed via `completion-at-point', bound to C-M-i
1533 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1534 default), this performs tag completion.
1536 ** Org mode has been updated to version 7.8.09.
1537 See ORG-NEWS for details.
1539 ** Prolog mode has been completely revamped, with lots of additional
1540 functionality such as more intelligent indentation, electricity,
1541 support for more variants, including Mercury, and a lot more.
1545 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1546 in the Rmail incoming message.
1548 *** The variable `rmail-message-filter' no longer has any effect.
1549 This change was made in Emacs 23.1 but was not advertised at the time.
1550 Try using `rmail-show-message-hook' instead.
1554 *** M-x shell prompts for the shell path name if the default directory
1555 is a remote file name and neither the environment variable $ESHELL nor
1556 the variable `explicit-shell-file-name' is set.
1558 *** TAB is now bound to the standard `completion-at-point' command,
1559 which now implements the pcomplete rules for shell command completion.
1563 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1564 if the mail server supports them. This uses either built-in GnuTLS
1565 support, or the starttls.el library. Customize `smtpmail-stream-type'
1568 *** The variable `smtpmail-auth-credentials' has been removed.
1569 By default, the information is now stored in the file ~/.authinfo.
1570 This was the default value of smtpmail-auth-credentials. If you had
1571 customized smtpmail-auth-credentials to a list of user names and
1572 passwords, those settings are not used. During your first connection
1573 to the smtp server, Emacs will prompt for the user name and password,
1574 and offer to save them to ~/.authinfo. Or you can manually copy the
1575 credentials to ~/.authinfo. For example, if you had
1577 (setq smtpmail-auth-credentials
1578 '(("mail.example.org" 25 "jim" "s!cret")))
1580 then the equivalent line in ~/.authinfo would be
1582 machine mail.example.org port 25 login jim password s!cret
1584 See the auth-source manual for more information, e.g. on encrypting
1585 the credentials file.
1587 *** The variable `smtpmail-starttls-credentials' has been removed.
1588 If you had that set, you need to put
1590 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1592 in your ~/.authinfo file instead.
1594 *** SMTPmail defaults to using the address in the From: header as the
1595 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1596 to the address you wish to use instead.
1600 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1601 and `sql-oracle-scan-on'.
1603 *** New options controlling prompting for login parameters.
1604 Each supported product has a custom variable `sql-*-login-params',
1605 which is a list of the parameters to be prompted for before a
1606 connection is established.
1608 *** The command `sql-product-interactive' now takes a prefix argument,
1609 which causes it to prompt for an SQL product.
1611 *** Product-specific SQL interactive commands now take prefix arguments.
1612 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1613 given a prefix argument, prompt for a name for the SQL interactive
1614 buffer. This reduces the need for calling `sql-rename-buffer'.
1616 *** SQL interactive modes suppress command continuation prompts, and
1617 replace tabs with spaces. The first change impacts multiple line SQL
1618 statements entered with C-j between each line, statements yanked into
1619 the buffer and statements sent with `sql-send-*' functions. The
1620 second prevents the MySQL and Postgres interpreters from listing
1621 object name completions when sent text via `sql-send-*' functions.
1623 *** New command `sql-connect' starts a predefined SQLi session,
1624 using the login parameters from `sql-connection-alist'.
1626 *** New "Save Connection" menu item in SQLi buffers.
1627 This gathers the login params specified for the SQLi session, if it
1628 was not started by a connection, and saves them as a new connection.
1630 *** New commands for listing database objects and details:
1631 sql-list-all and sql-list-table.
1633 *** An API for manipulating SQL product definitions has been added.
1637 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1641 *** New inline access method "ksu" (kerberized su).
1643 *** The following access methods are discontinued: "ssh1_old",
1644 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1646 *** The user option `remote-file-name-inhibit-cache' controls whether
1647 remote file attributes are cached for better performance.
1649 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1650 default value to "".
1652 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1653 for remote machines which support SELinux.
1655 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1656 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1657 the degree of parallelism.
1659 ** VC and related modes
1661 *** Support for pulling on distributed version control systems.
1662 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1663 supported (currently with Bzr, Git, and Mercurial), to update the
1664 current branch and working tree. A prefix argument means to prompt
1665 the user for specifics, e.g. a pull location.
1667 *** `vc-update' is now an alias for `vc-pull'.
1669 *** Support for merging on distributed version control systems.
1670 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1671 is supported (currently with Bzr, Git, and Mercurial), to merge
1672 changes from another branch into the current one. It prompts for
1673 specifics, e.g. a merge source.
1675 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1676 shows a diff while querying the user. It defaults to t.
1678 *** Log entries in some Log View buffers can be toggled to display a
1679 longer description by typing RET (log-view-toggle-entry-display).
1680 This is currently supported for Bzr, Git, and Mercurial (to support
1681 another backend, define a `log-view-expanded-log-entry-function').
1682 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1683 use this to display the full log entry for the revision at point.
1685 *** New command `vc-ediff' allows visual comparison of two revisions
1686 of a file similar to `vc-diff', but using ediff backend.
1688 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1689 this was not advertised at the time.
1691 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1692 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1693 this was not advertised at the time.
1699 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1701 *** partial-completion-mode (complete.el) is obsolete.
1702 You can get a comparable behavior with:
1703 (setq completion-styles '(partial-completion initials))
1704 (setq completion-pcm-complete-word-inserts-delimiters t)
1706 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1708 *** pgg is obsolete (use EasyPG instead).
1710 *** sregex.el is obsolete, since rx.el is a strict superset.
1712 *** s-region.el and pc-select.el are obsolete.
1713 They are superseded by shift-select-mode, enabled by default since 23.1.
1715 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1719 *** The Landmark game is now invoked with `landmark', not `lm'.
1720 Its functions and variables have been similarly renamed.
1722 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1723 (This interfered with cua-mode.)
1725 *** f90.el has some support for Fortran 2008 syntax.
1727 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1729 *** New command `nato-region' converts text to NATO phonetic alphabet.
1732 * New Modes and Packages in Emacs 24.1
1734 ** Occur Edit mode applies edits made in *Occur* buffers to the
1735 original buffers. It is bound to "e" in Occur mode.
1737 ** New global minor mode electric-pair-mode.
1738 When enabled, typing an open parenthesis automatically inserts the
1739 matching closing one.
1741 ** New global minor mode electric-indent-mode.
1742 When enabled, typing certain characters triggers reindentation.
1743 Major modes wishing to use this can set electric-indent-chars or
1744 electric-indent-functions.
1746 ** New global minor mode electric-layout-mode.
1747 When enabled, typing certain characters automatically inserts newlines.
1748 Major modes wishing to use this can set electric-layout-rules.
1750 ** tabulated-list.el provides a generic major mode for tabulated data,
1751 from which other modes can be derived.
1753 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1755 ** secrets.el is an implementation of the Secret Service API, an
1756 interface to password managers like GNOME Keyring or KDE Wallet. The
1757 Secret Service API requires D-Bus for communication. The command
1758 `secrets-show-secrets' offers a buffer with a visualization of the
1761 ** notifications.el provides an implementation of the Desktop
1762 Notifications API. It requires D-Bus for communication.
1764 ** soap-client.el supports access to SOAP web services from Emacs.
1765 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1767 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1769 ** New emacs-lock.el package.
1770 The previous version has been moved to obsolete/old-emacs-lock.el.
1771 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1772 against exiting Emacs and killing the buffer can be set separately.
1773 The mechanism for automatically turning off protection for buffers
1774 with dead inferior processes has been generalized.
1777 * Incompatible Lisp Changes in Emacs 24.1
1779 ** Passing a nil argument to a minor mode function call now ENABLES
1780 the minor mode unconditionally. This is so that you can write e.g.
1782 (add-hook 'text-mode-hook 'foo-mode)
1784 to enable foo-mode in Text mode buffers, removing the need for
1785 `turn-on-foo-mode' style functions. This affects all mode commands
1786 defined by `define-minor-mode'. If called interactively, the mode
1787 command still toggles the minor mode.
1789 ** The return value of `backup-buffer' has changed.
1790 It is now a list of three elements, where the second element is a list
1791 describing the original file's SELinux context. If Emacs or the
1792 system lacks SELinux support, the context list is (nil nil nil nil).
1793 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1795 ** `char-direction-table' and the `char-direction' function were deleted.
1796 They were buggy and inferior to the new support of bidirectional
1797 editing introduced in Emacs 24. If you need the bidirectional
1798 properties of a character, use `get-char-code-property' with the last
1799 argument `bidi-class'.
1801 ** `copy-directory' now copies the source directory as a subdirectory
1802 of the target directory, if the latter is an existing directory. The
1803 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1804 the contents directly into a pre-existing target directory.
1806 ** For mouse click input events in the text area, the Y pixel
1807 coordinate in the POSITION list now counts from the top of the text
1808 area, excluding any header line. Previously, it counted from the top
1811 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1812 been further reduced. Now a backquote not followed by a space is
1813 always treated as a "new-style" backquote. Please remove all
1814 "old-style" backquotes from your code. If your code uses backquotes
1815 as documented in the Elisp manual, and compiles without warning, then
1816 you have nothing to do in this regard. Code not following the
1817 appropriate conventions may fail to compile.
1819 The most common cause of trouble seems to be an old-style backquote
1820 followed by a newline. Another cause of trouble is vector notation
1821 for key sequence notation: instead of [(control ,)] and [(control ')],
1822 you should write [(control ?,)] and [(control ?')], which will work in
1825 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1826 was not advertised at the time. The function `custom-initialize-delay'
1827 replaced all known uses.
1829 ** `view-buffer' now treats special mode-class in the same way that
1830 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1831 major mode is special).
1833 ** Menu and tool bar changes
1835 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1836 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1837 With these alist entries omitted, `make-frame' checks the value of the
1838 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1839 a menu-bar or tool-bar, respectively. If the alist entries are added,
1840 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1842 *** The menu bar bindings's caches are not used any more.
1843 Use (where-is-internal <def> nil t) instead.
1845 ** Regions created by mouse dragging are now normal active regions,
1846 similar to those created by shift-selection (see Selection changes
1847 above). In previous Emacs versions, these regions were delineated by
1848 `mouse-drag-overlay'; that variable has been removed.
1850 ** The fourth argument of `filter-buffer-substring' has been removed.
1851 If you want to remove text properties from the final result, simply
1852 pass the result through substring-no-properties.
1854 ** cl.el no longer provides `cl-19'.
1856 ** The following obsolete functions and aliases have been removed
1857 (the appropriate new function is given in parentheses; "not needed"
1858 means you can just remove all calls to the function in question):
1860 *** `comint-kill-output' (`comint-delete-output')
1861 *** `decompose-composite-char' (`char-to-string')
1862 *** `outline-visible' (`outline-invisible-p')
1863 *** `internal-find-face' (`facep')
1864 *** `internal-get-face' (`facep and check-face')
1865 *** `frame-update-faces' (not needed)
1866 *** `frame-update-face-colors' (`frame-set-background-mode')
1867 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1868 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1869 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1870 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1871 *** `x-make-font-unbold' (`make-face-unbold')
1872 *** `x-make-font-unitalic' (`make-face-unitalic')
1873 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1874 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1875 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1876 *** `char-bytes' (== 1)
1877 *** `isearch-return-char' (`isearch-printing-char')
1878 *** `make-local-hook' (not needed)
1879 *** `set-screen-height' (`set-frame-height')
1880 *** `set-screen-width' (`set-frame-width')
1882 ** The following obsolete variables and varaliases have been removed
1883 (the appropriate new variable is given in parentheses):
1885 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1886 *** `vc-header-alist' (`vc-BACKEND-header')
1887 *** `directory-sep-char' (== ?/)
1888 *** `font-lock-defaults-alist' (`font-lock-defaults')
1889 *** `e' (`float-e').
1891 ** The following obsolete files were removed:
1892 sc.el, x-menu.el, rnews.el, rnewspost.el
1894 ** The format of the finder-inf.el file has changed, since the Finder
1895 mechanism is now based on the package system. The variable
1896 `finder-package-info' is replaced by `package--builtins' and
1897 `finder-keywords-hash'.
1899 ** When generating autoloads, `update-directory-autoloads' no longer
1900 assumes every inspected file is in your `load-path'. It instead
1901 generates relative names according to the current `load-path'.
1904 * Lisp changes in Emacs 24.1
1906 ** Code can now use lexical scoping by default instead of dynamic scoping.
1907 The `lexical-binding' variable enables lexical scoping for local
1908 variables. It is typically set via a file-local variable in the first
1909 line of the file, in which case it applies to all the code in that
1912 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1913 binding instead of the old dynamic binding mode.
1915 *** Lexically scoped interpreted functions are represented with a new form
1916 of function value which looks like (closure ENV ARGS &rest BODY).
1918 *** New macro `letrec' to define recursive local functions.
1920 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1921 So do `defcustom' and other forms that call `defvar' as a subroutine.
1923 *** New function `special-variable-p' to check whether a variable is
1924 declared as dynamically bound.
1926 *** The form ((lambda ...) ...) is deprecated.
1928 ** An Emacs Lisp testing tool is now included.
1929 Emacs Lisp developers can use this tool to write automated tests for
1930 their code. See the ERT info manual for details.
1932 ** Changes for bidirectional display and editing
1934 *** New function `current-bidi-paragraph-direction'.
1935 This returns the base direction of the paragraph at point.
1937 *** New function `bidi-string-mark-left-to-right'.
1938 Given a string containing characters from right-to-left scripts, this
1939 function returns another string which can be safely inserted into a
1940 buffer, such that any following text will be always displayed to the
1941 right of that string. (This works by appending an invisible Unicode
1942 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1944 This is useful when the buffer has overall left-to-right paragraph
1945 direction and you need to insert a string whose contents are not known
1946 in advance, without disrupting the layout of the line.
1950 *** Window tree functions are accessible in Elisp.
1951 Functions are provided to return the parent, siblings or child windows
1952 of any window including internal windows (windows not associated with a
1953 buffer) in the window tree.
1955 **** New function `window-valid-p' gives non-nil for live and internal
1958 **** Window manipulation can deal with internal windows.
1959 Many window handling functions like `split-window', `delete-window', or
1960 `delete-other-windows' as well as the window resizing functions can now
1961 act on any window including internal ones.
1963 *** window-total-height/-width vs window-body-height/-width.
1964 The function `window-height' has been renamed to `window-total-height'
1965 and `window-width' has been renamed to `window-body-width'. The old
1966 names are provided as aliases. Two new functions `window-total-width'
1967 and `window-body-height' are provided.
1969 *** Window parameters specific to window handling functions.
1970 For each window you can specify a parameter to override the default
1971 behavior of a number of functions like `split-window', `delete-window'
1972 and `delete-other-windows'. The variable `ignore-window-parameters'
1973 allows to ignore processing such parameters.
1975 *** New semantics of third argument of `split-window'.
1976 The third argument of `split-window' has been renamed to SIDE and can be
1977 set to any of the values 'below, 'right, 'above, or 'left to make the
1978 new window appear on the corresponding side of the window that shall be
1979 split. Any other value of SIDE will cause `split-window' to split the
1980 window into two side-by-side windows as before.
1982 *** Window resizing functions.
1983 A new standard function for resizing windows called `window-resize' has
1984 been introduced. This and all other functions for resizing windows no
1985 longer delete any windows when they become too small.
1987 *** Deleting the selected window now selects the most recently selected
1988 live window on that frame instead.
1990 *** `adjust-window-trailing-edge' adjustments.
1991 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1992 is able to resize other windows if a window adjacent to the trailing
1993 edge cannot be shrunk any more. This makes its behavior more similar to
1994 that of Emacs 21 without compromising, however, its inability to delete
1995 windows which was introduced in Emacs 22.
1997 *** Window-local buffer lists.
1998 Windows now have local buffer lists. This means that removing a buffer
1999 from display in a window will preferably show the buffer previously
2000 shown in that window with its previous window-start and window-point
2001 positions. This also means that the same buffer may be automatically
2002 shown twice even if it already appears in another window.
2004 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2005 which if non-nil requires the buffer to be displayed in the currently
2006 selected window, signaling an error otherwise. If nil, another window
2007 can be used, e.g. if the selected one is strongly dedicated.
2009 *** `split-window-vertically' and `split-window-horizontally' renamed
2010 to `split-window-below' and `split-window-right' respectively.
2011 The old names are kept as aliases.
2015 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2016 named ACTION, and takes a display action of the same form as
2017 `display-buffer-base-action' (see Changes, above). A non-nil,
2018 non-list value is treated specially, as the old meaning.
2020 **** New variable `display-buffer-overriding-action'.
2022 **** The procedure of `display-buffer' etc. to choose a window is
2023 determined by combining `display-buffer-overriding-action',
2024 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2025 and `display-buffer-fallback-action'. The second and fourth of these
2026 are user-customizable variables.
2028 See the docstring of `display-buffer' for details.
2030 *** New functions `window-state-get' and `window-state-put'.
2031 These functions allow to save and restore the state of an arbitrary
2032 frame or window as an Elisp object.
2036 *** New variable `completion-extra-properties' used to specify extra
2037 properties of the current completion:
2038 - :annotate-function, same as the old completion-annotate-function.
2039 - :exit-function, function to call after completion took place.
2041 *** Functions on `completion-at-point-functions' can return any of the
2042 properties valid for `completion-extra-properties'.
2044 *** `completion-annotate-function' is obsolete.
2046 *** New `metadata' method for completion tables. The metadata thus returned
2047 can specify various details of the data returned by `all-completions':
2048 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2049 used to select a style in completion-category-overrides.
2050 - `annotation-function' to add annotations in *Completions*.
2051 - `display-sort-function' to specify how to sort entries in *Completions*.
2052 - `cycle-sort-function' to specify how to sort entries when cycling.
2054 *** `minibuffer-local-filename-must-match-map' is not used any more.
2055 Instead, the bindings in `minibuffer-local-filename-completion-map'
2056 are combined with `minibuffer-local-must-match-map'.
2058 *** New variable `completing-read-function' allows overriding the
2059 behavior of `completing-read'.
2061 ** `glyphless-char-display' can now distinguish between graphical and
2062 text terminal display, via a char-table entry that is a cons cell.
2064 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2065 Instead, the offending function is removed.
2069 *** New function `run-hook-wrapped' for running an abnormal hook by
2070 passing the hook functions as arguments to a "wrapping" function.
2071 Like `run-hook-with-args-until-success', it stops at the first
2072 non-nil return value.
2074 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2075 set of "wrapping" filters, similar to around advice.
2076 (A version of this macro was actually added in Emacs 23.2 but was not
2077 advertised at the time.)
2081 *** New macro `condition-case-unless-debug' (this was actually added in
2082 Emacs 23.1 as condition-case-no-debug, but not advertised)
2084 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2086 *** Variable `stack-trace-on-error' removed.
2088 *** The debugger can now "continue" from an error, which means it will
2089 jump to the error handler as if the debugger had not been invoked
2090 instead of jumping all the way to the top-level.
2092 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2093 This can be useful when `inhibit-quit' is set.
2095 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2096 named Emacs server instances.
2098 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2099 to redirect STDOUT to a file.
2101 ** The function `format-time-string' now supports the %N directive,
2102 for higher-resolution time stamps.
2104 ** New input reading functions
2106 *** New function `read-char-choice' reads a restricted set of
2107 characters, discarding any inputs not inside the set.
2109 *** The command `read-color' now requires a match for a color name
2110 or RGB triplet, instead of signaling an error if the user provides
2113 **** `facemenu-read-color' is now an alias for `read-color'.
2115 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2116 The variable is now used to load all kind of supported dynamic libraries,
2117 not just image libraries. The previous name is still available as an
2120 ** Syntax parsing changes
2122 *** New variable `syntax-propertize-function'.
2123 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2124 This allows syntax-table properties to be set independently from font-lock:
2125 just call syntax-propertize to make sure the text is propertized.
2126 Together with this new variable come a new hook
2127 syntax-propertize-extend-region-functions, as well as two helper functions:
2128 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2129 as-is; and syntax-propertize-rules which provides a new way to specify
2132 *** Syntax tables support a new "comment style c" additionally to style b.
2134 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2136 ** frame-local variables cannot be let-bound any more.
2138 ** Major and minor mode changes
2140 *** `set-auto-mode' now respects mode: local variables at the end of files,
2141 as well as those in the -*- line.
2143 *** `prog-mode' is a new major mode from which programming modes
2146 **** `prog-mode-hook' can be used to enable features for programming
2147 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2148 on-the-fly spell checking for comments and strings.
2150 *** New hook `change-major-mode-after-body-hook', run by
2151 `run-mode-hooks' just before any other mode hooks.
2153 *** Enabled globalized minor modes can be disabled in specific major modes.
2154 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2155 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2157 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2159 ** File-handling changes
2161 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2162 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2163 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2164 argument is supplied (see Trash changes, above).
2166 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2168 ** Tool-bars can display separators.
2169 Tool-bar separators are handled like menu separators in menu-bar maps,
2170 i.e. via menu entries of the form `(menu-item "--")'.
2174 *** Animated images support (currently animated gifs only).
2176 **** `image-animated-p' returns non-nil if an image can be animated.
2178 **** `image-animate' animates a supplied image spec.
2180 **** `image-animate-timer' returns the timer object for an image that
2183 *** `image-extension-data' has been renamed to `image-metadata'.
2184 The old name is an obsolete alias to the new one.
2186 *** Image mode can view any image type that ImageMagick supports.
2187 This requires Emacs to be built with ImageMagick support.
2189 **** New function `imagemagick-types', defined if ImageMagick support
2190 is enabled, returns a list of image file extensions that your
2191 ImageMagick installation supports.
2193 **** New function `imagemagick-register-types' enables ImageMagick
2194 image types in Image mode and in `create-image' and other helper
2197 **** New option `imagemagick-types-inhibit' excludes certain
2198 ImageMagick image types from `imagemagick-register-types'.
2200 **** With ImageMagick support, there are extra Image mode commands to
2201 resize and rotate images: `image-transform-fit-to-height',
2202 `image-transform-fit-to-width', `image-transform-set-rotation', and
2203 `image-transform-set-scale'.
2205 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2206 passes it to the mail user agent function. This argument specifies an
2207 action for returning to the caller after finishing with the mail. For
2208 example, this is used by Rmail to optionally delete a mail window.
2210 ** XML and HTML parsing
2211 If Emacs is compiled with libxml2 support, there are two new
2212 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2213 and `libxml-parse-xml-region' (which parses XML). Both return an
2214 Emacs Lisp parse tree.
2216 ** Networking and encryption changes
2218 *** `open-network-stream' can now be used to open an encrypted stream.
2219 It now accepts an optional `:type' parameter for initiating a TLS
2220 connection, directly or via STARTTLS. To do STARTTLS, additional
2221 parameters (`:end-of-command', `:success', `:capabilities-command')
2222 must also be supplied.
2224 *** New library gnutls.el.
2225 The new function `gnutls-available-p' returns non-nil if Emacs is
2226 built with GnuTLS support. The main entry points are
2227 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2228 these functions through `open-network-stream', because that can
2229 upgrade connections through STARTTLS opportunistically or use plain
2230 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2233 *** New primitive `secure-hash' that supports many secure hash algorithms:
2234 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2235 sha1.el has been removed. The `sha1' feature is provided by default.
2239 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2241 ** Progress reporters can now "spin".
2242 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2243 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2244 time you call `progress-reporter-update' on that progress reporter,
2245 with a nil or omitted VALUE argument, the reporter message is
2246 displayed with a "spinning bar".
2248 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2249 being reverted, even if the buffer has a local `revert-buffer-function'.
2251 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2252 If delayed-warnings-list is non-nil, the command loop calls
2253 `delayed-warnings-hook' after `post-command-hook'. At present, this
2254 is only used by Emacs on some platforms to display warnings during
2255 startup, which might otherwise not be noticed. This uses the
2256 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2258 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2260 ** New function `make-composed-keymap' that constructs a new keymap
2261 from multiple input maps. You can use this to make a keymap that
2262 inherits from multiple maps, eg:
2263 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2265 ** New function `string-prefix-p'.
2266 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2268 ** New reader macro ## that stands for the empty symbol.
2269 This means that the empty symbol can now be read back. Also, #: by itself
2270 (when not immediately followed by a possible symbol character) stands for
2271 an empty uninterned symbol.
2273 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2275 ** The following functions and variables are obsolete:
2277 *** `tooltip-use-echo-area' is obsolete.
2278 Rather than setting this to t, disable Tooltip mode instead.
2280 *** buffer-substring-filters is obsolete.
2281 Use `filter-buffer-substring-functions' instead.
2283 *** `byte-compile-disable-print-circle' is obsolete.
2285 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2286 Use `post-command-hook' instead.
2288 *** `font-lock-maximum-size' is obsolete.
2291 * Changes in Emacs 24.1 on non-free operating systems
2293 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2294 and also when HOME is set to C:\ by default.
2296 ** New configure.bat options
2298 *** --enable-checking builds Emacs with extra runtime checks.
2300 *** --distfiles specifies files to be included in binary distribution.
2302 *** --without-gnutls disables automatic GnuTLS detection.
2304 *** --lib for general library linkage, works with the USER_LIBS build variable.
2306 ** New make target `dist' to create binary distribution for MS Windows.
2308 ** The Lisp function `w32-default-color-map' is now obsolete.
2309 (It is only used internally in the Emacs C code.)
2311 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2312 reappear on mouse-over. (Requires OS X 10.6 or later.)
2314 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2315 other platforms, rather than inserting its contents into the buffer.
2318 ----------------------------------------------------------------------
2319 This file is part of GNU Emacs.
2321 GNU Emacs is free software: you can redistribute it and/or modify
2322 it under the terms of the GNU General Public License as published by
2323 the Free Software Foundation, either version 3 of the License, or
2324 (at your option) any later version.
2326 GNU Emacs is distributed in the hope that it will be useful,
2327 but WITHOUT ANY WARRANTY; without even the implied warranty of
2328 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2329 GNU General Public License for more details.
2331 You should have received a copy of the GNU General Public License
2332 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2337 paragraph-separate: "[
\f]*$"