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
79 ** Emacs no longer searches for `leim-list.el' files beneath the standard
80 lisp/ directory. There should not be any there anyway. If you have
81 been adding them there, put them somewhere else, eg site-lisp.
84 ** The `--no-site-lisp' command line option now works for Nextstep builds.
87 * Changes in Emacs 24.3
89 ** minibuffer-electric-default-mode can rewrite (default ...) to [...].
90 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
92 ** Most y-or-n prompts now allow you to scroll the selected window.
93 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
94 respectively, without exiting from the prompt.
96 ** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
97 next and previous path separator, respectively.
101 *** New option `mode-line-default-help-echo' specifies the help text
102 (shown in a tooltip or in the echo area) for any part of the mode line
103 that does not have its own specialized help text.
105 *** You can now click mouse-3 in the coding system indicator to
106 invokes `set-buffer-file-coding-system'.
110 *** `C-h f' (describe-function) can now perform autoloading.
111 When this command is called for an autoloaded function whose docstring
112 contains a key substitution construct, that function's library is
113 automatically loaded, so that the documentation can be shown
114 correctly. To disable this, set `help-enable-auto-load' to nil.
116 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
117 even after their associated libraries have been loaded (and the
118 autoloads have been redefined as functions).
120 ** ImageMagick support, if available, is automatically enabled.
121 It is no longer necessary to call `imagemagick-register-types'
122 explicitly to install ImageMagick image types; that function is called
123 automatically at startup, or when customizing a relevant imagemagick-
126 *** Setting `imagemagick-types-inhibit' to t now disables the use of
127 ImageMagick to view images. You must call imagemagick-register-types
128 afterwards if you do not use customize to change this.
130 *** The new variable `imagemagick-enabled-types' also affects which
131 ImageMagick types are treated as images. The function
132 `imagemagick-filter-types' returns the list of types that will be
135 *** Images displayed via ImageMagick now support transparency and the
136 :background image spec property.
138 ** Server and client changes
140 *** emacsclient now obeys string values for `initial-buffer-choice',
141 if it is told to open a new frame without specifying any file to visit
142 or expression to evaluate.
144 *** New option `server-auth-key' specifies a shared server key.
146 ** In the Package Menu, newly-available packages are listed as "new",
147 and sorted above the other "available" packages by default.
150 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
151 This minor mode replaces `toggle-read-only', which is now obsolete.
153 ** Emacs now generates backtraces on fatal errors.
154 On encountering a fatal error, Emacs now outputs a textual description
155 of the fatal signal, and a short backtrace on platforms like glibc
156 that support backtraces.
158 ** If your Emacs was built from a bzr checkout, the new variable
159 `emacs-bzr-version' contains information about the bzr revision used.
162 ** New variable `create-lockfiles' specifies usage of lockfiles.
163 It defaults to t. Changing it to nil inhibits the creation of lock
164 files (use this with caution).
167 ** Using "unibyte: t" in Lisp source files is obsolete.
168 Use "coding: raw-text" instead.
171 ** Setting `enable-remote-dir-locals' to non-nil allows directory
172 local variables on remote hosts.
175 ** The entry for PCL-CVS has been removed from the Tools menu.
176 The PCL-CVS commands are still available via the keyboard.
178 ** Internationalization changes
180 *** New language environment: Persian.
182 *** New input method `vietnamese-vni'.
185 * Editing Changes in Emacs 24.3
188 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
189 `ucs-insert' is now an obsolete alias for `insert-char'.
192 ** The `z' key no longer has a binding in most special modes.
193 It used to be bound to `kill-this-buffer', but `z' is too easy to
196 ** New option `delete-trailing-lines' specifies whether
197 M-x delete-trailing-whitespace should delete trailing lines at the end
198 of the buffer. It defaults to t.
200 ** Search and Replace changes
202 *** Non-regexp Isearch now performs "lax" space matching.
203 Each sequence of spaces in the supplied search string may match any
204 sequence of one or more whitespace characters, as specified by the
205 variable `search-whitespace-regexp'. (This variable is also used by a
206 similar existing feature for regexp Isearch).
208 *** New Isearch command `M-s SPC' toggles lax space matching.
209 This applies to both ordinary and regexp Isearch.
211 *** New option `replace-lax-whitespace'.
212 If non-nil, `query-replace' uses flexible whitespace matching too.
215 *** Global `M-s _' starts a symbol (identifier) incremental search,
216 and `M-s _' in Isearch toggles symbol search mode.
217 `M-s c' in Isearch toggles search case-sensitivity.
221 *** `C-x r +' is now overloaded to invoke `append-to-register.
223 *** New option `register-separator' specifies the register containing
224 the text to put between collected texts for use with M-x
225 append-to-register and M-x prepend-to-register.
227 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
229 ** New binding `M-g c' for `goto-char'.
231 ** M-x move-to-column, if called interactively with no prefix arg, now
232 prompts for a column number.
234 ** New command `C-x r M-w' (copy-rectangle-as-kill).
235 It copies the region-rectangle as the last rectangle kill.
237 ** New option `yank-handled-properties' allows processing of text
238 properties on yanked text, in more ways that are more general than
239 just removing them, as done by `yank-excluded-properties'.
242 * Changes in Specialized Modes and Packages in Emacs 24.3
246 *** The faces used by Apropos are now directly customizable.
247 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
248 see the `apropos' Custom group for details.
250 **** The old options whose values specified faces to use were removed
251 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
254 This package has been rewritten to use Tabulated List mode.
256 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
257 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
261 *** You can customize the header text that appears above each calendar month.
262 See the variable `calendar-month-header'.
264 *** The calendars produced by cal-html include holidays.
265 Customize cal-html-holidays to change this.
269 *** CL's main entry is now (require 'cl-lib).
270 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
271 i.e. all its definitions have the "cl-" prefix (and internal definitions use
274 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
275 under the name `cl-foo' instead, with the exceptions of the few definitions
276 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
277 which have not been renamed to `cl-foo*' but just `cl-foo'.
279 The old `cl' is now deprecated and is just a bunch of aliases that
280 provide the old non-prefixed names.
282 *** `cl-flet' is not like `flet' (which is deprecated).
283 Instead it obeys the behavior of Common-Lisp's `flet'.
285 *** `cl-labels' is slightly different from `labels'.
286 The difference is that it relies on the `lexical-binding' machinery (as opposed
287 to the `lexical-let' machinery used previously) to capture definitions in
288 closures, so such closures will only work if `lexical-binding' is in use.
290 *** `progv' was rewritten to use the `let' machinery.
291 A side effect is that vars without corresponding value are bound to nil
292 rather than making them unbound.
296 *** New option `compilation-always-kill'.
300 *** `custom-reset-button-menu' now defaults to t.
302 *** Non-option variables are never matched in `customize-apropos' and
303 `customize-apropos-options' (i.e. the prefix argument does nothing for
308 *** `desktop-path' no longer includes the "." directory. Desktop
309 files are now located in ~/.emacs.d by default.
314 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
317 *** The D-Bus object manager interface is implemented.
320 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
321 if their value does not fit into Emacs's integer range.
324 *** The function `dbus-call-method' works non-blocking now, it can be
325 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
328 *** Signals can be sent also as unicast message.
331 *** The argument list of `dbus-register-signal' has been extended,
332 according to the new match rule types of D-Bus. See the manual for
336 *** `dbus-init-bus' supports private connections.
339 *** There is a new function `dbus-setenv'.
343 *** Changes are now highlighted using the same color scheme as in
344 modern VCSes. Deletions are displayed in red (new faces
345 `diff-refine-removed' and `smerge-refined-removed' and new definition
346 of `diff-removed'), insertions in green (new faces `diff-refine-added'
347 and `smerge-refined-added' and new definition of `diff-added').
349 *** The variable `diff-use-changed-face' defines whether to use the
350 face `diff-changed', or `diff-removed' and `diff-added' to highlight
351 changes in context diffs.
353 *** The new command `diff-remove-trailing-whitespace' fixes trailing
354 whitespace problems introduced by the diff.
358 *** `dired-do-async-shell-command' executes each file sequentially
359 if the command ends in `;' (when operating on multiple files).
360 Otherwise, it executes the command on each file in parallel.
362 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
363 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
366 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
367 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
368 mark/unmark/flag all files in the active region.
370 *** The minibuffer default for `=' (`dired-diff) has changed.
371 It is now the backup file for the file at point, if one exists.
372 In Transient Mark mode the default is the file at the active mark.
374 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
375 The global binding for `M-=', `count-words-region' is in effect.
377 ** Ediff now uses the same color scheme as Diff mode.
379 ** erc will look up server/channel names via auth-source and use the
380 channel keys found, if any.
382 ** Flymake uses fringe bitmaps to indicate errors and warnings.
383 See flymake-fringe-indicator-position, flymake-error-bitmap and
384 flymake-warning-bitmap.
388 *** The obsolete variable `follow-mode-off-hook' has been removed.
390 *** Follow mode no longer works by using advice.
391 The option `follow-intercept-processes' has been removed.
395 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
396 specifying URL types which should be converted to remote file names at
397 the FFAP prompt. The default is now '("ftp").
401 *** New `derived-mode' filter, bound to `/ M'.
402 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
404 ** Mouse Avoidance mode
406 The new variable `mouse-avoidance-banish-position' can now be used to
407 customize Mouse Avoidance mode further.
410 ** notifications.el supports now version 1.2 of the Notifications API.
411 The function `notifications-get-capabilities' returns the supported
414 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
415 closing brackets to be aligned with the line of the opening bracket.
417 ** In Proced mode, new command `proced-renice' renices marked processes.
421 A new version of python.el, which provides several new features, including:
422 per-buffer shells, better indentation, Python 3 support, and improved
423 shell-interaction compatible with iPython (and virtually any other
426 *** Some user options have been replaced/renamed:
427 Old defcustom: | New defcustom:
428 python-indent | python-indent-offset
429 python-guess-indent | python-indent-guess-indent-offset
430 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
431 python-use-skeletons | python-skeleton-autoinsert
433 *** Some user options have been removed:
435 **** `python-indent-string-contents': Strings are never indented.
437 **** `python-honour-comment-indentation':
438 Comments are never considered as indentation markers themselves.
440 **** `python-continuation-offset': Indentation is automatically
441 calculated in a pep8 compliant way depending on the context.
443 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
444 Have no direct mapping as the shell interaction is completely different.
446 **** `python-python-command', `python-jython-command':
447 Replaced by `python-shell-interpreter'.
449 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
450 `python-pdbtrack-minor-mode-string', `python-source-modes':
453 *** Some commands have been replaced:
454 Old command | New command
455 python-insert-class | python-skeleton-class
456 python-insert-def | python-skeleton-def
457 python-insert-for | python-skeleton-for
458 python-insert-if | python-skeleton-if
459 python-insert-try/except | python-skeleton-try
460 python-insert-try/finally | python-skeleton-try
461 python-insert-while | python-skeleton-while
462 python-find-function | python-nav-jump-to-defun
463 python-next-statement | python-nav-forward-sentence
464 python-previous-statement | python-nav-backward-sentence
465 python-send-buffer | python-shell-send-buffer
466 python-send-defun | python-shell-send-defun
467 python-send-region | python-shell-send-region
468 python-send-region-and-go | Emulate with python-shell-send-region and
469 python-shell-switch-to-shell
470 python-send-string | python-shell-send-string
471 python-switch-to-python | python-shell-switch-to-shell
472 python-describe-symbol | python-eldoc-at-point
474 ** reStructuredText mode
476 *** Rebind nearly all keys making room for more keys and complying
477 better to usage in other modes. Describe bindings with C-c C-h.
479 *** Major revision of indentation working very similar to other
480 modes. TAB is your friend.
482 *** Major revision of filling working fine with most of
483 reStructuredText syntax. Support auto-filling.
485 *** Major revision of comment handling.
487 *** Major revision of fontification working with `jit-lock-mode'.
489 *** Cover reStructuredText syntax more closely. Improve
490 the experience for Sphinx users.
492 *** `rst-insert-list' inserts new list or continues existing lists.
494 *** Extend correct and improve customization.
496 *** Negative prefix argument always works for `rst-adjust'.
498 *** Reset window configuration after displaying TOC.
500 *** Package version in `rst-version'.
502 *** Support `imenu' and `which-func'.
506 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
508 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
510 *** `sh-use-smie' lets you choose a new indentation and navigation code.
514 *** New option `async-shell-command-buffer' specifies what buffer to use
515 for a new asynchronous shell command when the default output buffer
516 `*Async Shell Command*' is already taken by another running command.
520 *** DB2 added `sql-db2-escape-newlines'
522 If non-nil, newlines sent to the command interpreter will be escaped
523 by a backslash. The default does not escape the newlines and assumes
524 that the sql statement will be terminated by a semicolon.
526 ** Tabulated List and packages derived from it
528 *** New command `tabulated-list-sort', bound to `S', sorts the column
529 at point, or the Nth column if a numeric prefix argument is given.
533 The variables `term-default-fg-color' and `term-default-bg-color' are
534 now deprecated in favor of the `term-face' face, that you can
535 customize. Also, it is now possible to customize how are displayed the
536 ANSI terminal colors and styles by customizing the corresponding
537 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
542 *** The syntax has been extended in order to allow ad-hoc proxy
543 definitions. See the manual for details.
545 *** Remote processes are now supported also on remote Windows host.
549 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
550 Previously, this slot stored semicolon-separated attribute-value pairs
551 appended to some imap URLs, but this is not compatible with RFC 3986.
552 So now the `filename' slot stores the entire path and query components
553 and the `attributes' slot is always nil.
555 *** New function `url-encode-url' for encoding a URI string.
556 The `url-retrieve' function now uses this to encode its URL argument,
557 in case that is not properly encoded.
561 *** The free software compiler GHDL is supported (and now the default).
563 *** Support for the VHDL-AMS packages has been added/updated.
565 *** Updated to the 2002 revision of the VHDL standard.
567 *** Accepts \r and \f as whitespace.
569 ** which-function-mode now applies to all applicable major modes by default.
572 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
575 ** FIXME something happened to ses.el, 2012-04-17.
578 ** Obsolete packages:
581 In most cases, assoc+member+push+delq work just as well.
582 And in any case it's just a terrible package: ugly semantics, terrible
583 inefficiency, and not namespace-clean.
598 * New Modes and Packages in Emacs 24.3
600 * Incompatible Lisp Changes in Emacs 24.3
602 ** (random) by default now returns a different random sequence in
603 every Emacs run. Use (random S), where S is a string, to set the
604 random seed to a value based on S, in order to get a repeatable
605 sequence in later calls.
607 ** The function `x-select-font' can return a font spec, instead of a
608 font name as a string. Whether it returns a font spec or a font name
609 depends on the graphical library.
611 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
612 that substring is inserted literally even if the LITERAL arg is
613 non-nil, instead of causing an error to be signaled.
616 ** Docstrings starting with `*' no longer indicate user options.
617 Only variables defined using `defcustom' are considered user options.
618 The function `user-variable-p' is now an obsolete alias for
622 ** The return values of `defalias', `defun' and `defmacro' have changed,
623 and are now undefined. For backwards compatibility, defun and
624 defmacro currently return the name of the newly defined function/macro
625 but this should not be relied upon.
627 ** `face-spec-set' no longer sets frame-specific attributes when the
628 third argument is a frame (that usage was obsolete since Emacs 22.2).
631 ** The arguments of `dbus-register-signal' are no longer just strings,
632 but keywords or keyword-string pairs. The old argument list will
633 still be supported for Emacs 24.x.
636 Some Lisp symbols have been renamed to avoid problems with spelling
637 that is incorrect or inconsistent with how Emacs normally spells a word.
639 *** Renamed functions
641 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
642 **** inactivate-input-method -> deactivate-input-method
643 **** quail-inactivate -> quail-deactivate
644 **** robin-inactivate -> robin-deactivate
645 **** viper-inactivate-input-method -> viper-deactivate-input-method
646 **** viper-inactivate-input-method-action ->
647 viper-deactivate-input-method-action
648 **** ucs-input-inactivate -> ucs-input-deactivate
651 The old hooks are still supported for backward compatibility, but they
652 are deprecated and will be removed eventually.
654 **** input-method-inactivate-hook -> input-method-deactivate-hook
655 **** robin-inactivate-hook -> robin-deactivate-hook
656 **** quail-inactivate-hook -> quail-deactivate-hook
658 *** Renamed Lisp variables
660 **** follow-deactive-menu -> follow-inactive-menu
661 **** inactivate-current-input-method-function ->
662 deactivate-current-input-method-function
664 ** Some obsolete functions and variables were removed:
666 *** `facemenu-unlisted-faces'
667 *** `rmail-decode-mime-charset'
668 *** `last-input-char', `last-command-char', `unread-command-char'.
669 *** `iswitchb-read-buffer'
670 *** `sc-version', `sc-submit-bug-report'
671 *** `set-char-table-default'
672 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
673 *** `compile-internal'
674 *** `mode-line-inverse-video'
675 *** `cvs-commit-buffer-require-final-newline'
676 (use `'log-edit-require-final-newline'instead)
677 *** `cvs-changelog-full-paragraphs'
678 (use `log-edit-changelog-full-paragraphs' instead)
679 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
680 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
681 *** `vc-master-templates' (use `vc-handled-backends' instead)
682 *** `vc-checkout-carefully'
685 * Lisp changes in Emacs 24.3
687 ** New sampling-based Elisp profiler.
688 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
689 The sampling rate can be based on CPU time (only supported on some
690 systems), or based on memory allocations.
692 ** CL-style generalized variables are now in core Elisp.
693 `setf' is autoloaded; `push' and `pop' accept generalized variables.
695 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
696 The interpretation of the DECLS is determined by `defun-declarations-alist'.
700 *** New function `completion-table-with-quoting' to handle completion
701 in the presence of quoting, such as file completion in shell buffers.
703 *** New function `completion-table-subvert' to use an existing completion
704 table, but with a different prefix.
708 *** New error type and new function `user-error'.
709 These do not trigger the debugger.
711 *** New option `debugger-bury-or-kill'.
713 *** Set `debug-on-message' to enter the debugger when a certain
714 message is displayed in the echo area. This can be useful when trying
715 to work out which code is doing something.
717 *** New var `inhibit-debugger', automatically set to prevent accidental
718 recursive invocations.
722 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
723 of `read-regexp' accepts a string ending with a colon and space, and its
724 second argument DEFAULTS can be a list of strings accessible via M-n
725 in the minibuffer ahead of other hard-coded useful regexp-related values.
726 More commands use `read-regexp' now to read their regexp arguments.
730 *** The functions get-lru-window, get-mru-window and get-largest-window
731 now accept a third argument to avoid choosing the selected window.
733 *** Additional values recognized for option `window-combination-limit'.
735 *** New macro `with-temp-buffer-window'.
737 *** New options `temp-buffer-resize-frames' and
738 `temp-buffer-resize-regexps'.
740 *** `temp-buffer-resize-mode' no longer resizes windows that have been
743 *** New function `fit-frame-to-buffer' and new option
744 `fit-frame-to-buffer-bottom-margin'.
746 *** New display action functions `display-buffer-below-selected',
747 `display-buffer-at-bottom' and `display-buffer-in-previous-window'.
749 *** New display action alist entry `inhibit-switch-frame', if non-nil,
750 tells display action functions to avoid changing which frame is
753 *** New display action alist entry `pop-up-frame-parameters', if
754 non-nil, specifies frame parameters to give any newly-created frame.
756 *** New display action alist entry `previous-window', if non-nil,
757 specifies window to reuse in `display-buffer-in-previous-window'.
759 *** The following variables are obsolete, as they can be replaced by
760 appropriate entries in the `display-buffer-alist' function introduced
763 **** `display-buffer-reuse-frames'
764 **** `special-display-regexps'
765 **** `special-display-frame-alist'
766 **** `special-display-buffer-names'
767 **** `special-display-function'
768 **** `display-buffer-function'
772 *** `current-time-string' no longer requires that its argument's year
773 must be in the range 1000..9999. It now works with any year supported
774 by the underlying C implementation.
776 *** `current-time' now returns extended-format time stamps
777 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
778 PSEC is typically a multiple of 1000 on current machines. Other
779 functions that use this format, such as file-attributes and
780 format-time-string, have been changed accordingly. Old-format time
781 stamps are still accepted.
783 *** The format of timers in timer-list and timer-idle-list is now
784 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
785 The PSECS slot is new, and uses picosecond resolution. It can be
786 accessed via the new timer--psecs accessor.
788 ** Floating point functions now always return special values like NaN,
789 instead of signaling errors, if given invalid args, e.g. (log -1.0).
790 Previously, they returned NaNs on some platforms but signaled errors
791 on others. The affected functions are acos, asin, tan, exp, expt,
792 log, log10, sqrt, and mod.
794 ** Interpreted files are eagerly macro-expanded during load.
795 This can significantly speed up execution of non-byte-compiled code,
796 but can also bump into harmless and previously unnoticed cyclic
797 dependencies. These should not be fatal: they will simply cause the
798 macro-calls to be left for later expansion (as before), but will also
799 result in a warning describing the cycle.
801 ** Misc new functions:
804 *** `autoload-do-load'.
805 *** `buffer-narrowed-p' tests if the buffer is narrowed.
806 *** `file-name-base' returns a file name sans directory and extension.
807 *** `function-get' fetches a function property, following aliases.
808 *** `posnp' tests if an object is a `posn'.
809 *** `set-temporary-overlay-map' sets up a temporary overlay map.
810 *** `system-users' returns the user names on the system.
811 *** `system-groups' returns the group names on the system.
812 *** `tty-top-frame' returns the topmost frame of a text terminal.
814 ** New macros `setq-local' and `defvar-local'.
816 ** New fringe bitmap exclamation-mark.
818 ** Face underlining can now use a wave.
819 See the "Face Attributes" section of the Elisp manual.
821 ** The following functions and variables are obsolete:
823 *** `automount-dir-prefix'
824 *** `buffer-has-markers-at'
825 *** `macro-declaration-function' (use `macro-declarations-alist').
826 *** `window-system-version'
829 * Changes in Emacs 24.3 on non-free operating systems
831 ** New configure.bat options on MS-Windows:
833 *** --without-libxml2 omits support for libxml2, even if its presence
836 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
837 Emacs now supports mouse highlight, help-echo (in the echo area), and
838 mouse-autoselect-window.
840 ** On MS-Windows Vista and later Emacs now supports symbolic links.
842 * Changes in Emacs 24.2
844 ** This is mainly a bug-fix release.
847 * Installation Changes in Emacs 24.1
849 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
850 to configure. Note that other libraries used by Emacs, RSVG and GConf,
851 also depend on Gtk+. You can disable them with --without-rsvg and
854 ** Emacs can be compiled with GnuTLS support.
855 This happens by default if a suitably recent version of the library is
856 found at build time. To prevent this, use the configure option
857 `--without-gnutls'. See below for GnuTLS features.
859 ** Emacs can be compiled with SELinux support.
860 This happens by default if a suitably recent version of the library is
861 found at build time. To prevent this, use the configure option
862 `--without-selinux'. See below for SELinux features.
864 ** Emacs can be compiled with ImageMagick support.
865 This happens by default if a suitably recent version of the library is
866 found at build time. To prevent this, use the configure option
867 `--without-imagemagick'. See below for ImageMagick features.
868 This feature is not available for the Nextstep or MS ports.
870 ** Emacs can be compiled with libxml2 support.
871 This happens by default if a suitably recent version of the library is
872 found at build time. To prevent this, use the configure option
873 `--without-xml2'. See below for libxml2 features.
875 ** By default, the installed Info and man pages are compressed.
876 You can disable this by configuring --without-compress-info.
878 ** New configure option --with-wide-int.
879 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
880 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
883 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
884 These provide no new functionality, they just remove the need to edit
885 lib-src/Makefile by hand in order to use the associated features.
887 ** New configure option --enable-use-lisp-union-type.
888 This is only useful for Emacs developers to debug certain types of bugs.
889 This is not a new feature; only the configure flag is new.
891 ** The standalone programs digest-doc and sorted-doc are removed.
892 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
894 ** The standalone program `fakemail' is removed.
895 If you need it, feedmail.el provides a superset of the functionality.
898 * Startup Changes in Emacs 24.1
900 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
901 command line arguments, and the EMACS_UNIBYTE environment variable, no
902 longer have any effect. (They were declared obsolete in Emacs 23.)
904 ** New command line option `--no-site-lisp' removes site-lisp directories
905 from load-path. -Q now implies this. This option does not affect the
906 EMACSLOADPATH environment variable (and hence has no effect for
910 * Changes in Emacs 24.1
914 *** Many packages now use the `completion-at-point' command,
915 rather than implementing separate completion commands.
917 *** `completion-at-point' now handles tags and semantic completion.
919 *** Completion in a non-minibuffer now tries to detect the end of completion
920 and pops down the *Completions* buffer accordingly.
922 *** New option `completion-cycle-threshold' allows completion cycling.
924 *** New option `completion-category-overrides' for overriding the
925 default completion style in certain circumstances.
927 *** New completion style `substring'.
929 *** Completion of buffer names uses `substring' completion by default.
931 *** The option `widget-complete-field' has been removed.
935 *** The first time you try sending mail, Emacs asks for a mail method.
936 This is implemented by a new default for `send-mail-function', which
937 is `sendmail-query-once'. This offers to use the smtpmail package, or
938 to use the old defaults relying on external mail facilities
939 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
940 `mailclient-send-it' on Windows).
942 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
943 the report to your desktop's preferred mail client, if there is one.
944 This uses either the "xdg-email" utility, or Mac OS's "open" command.
946 *** See Changes in Specialized Modes and Packages for SMTPmail changes
947 and Mail mode changes
949 ** Emacs server and client changes
951 *** New option `server-port' specifies the port for TCP Emacs servers.
953 *** New emacsclient argument -q/--quiet suppresses some status messages.
955 *** New emacsclient argument --frame-parameters specifies the frame
956 parameters of any newly-created graphical frame.
958 *** If emacsclient shuts down due to Emacs signaling an error,
959 its exit status is 1.
961 *** New emacsclient argument --parent-id ID.
962 This opens a client frame in parent X window ID, via XEmbed, similar
963 to the --parent-id argument to Emacs.
965 ** Internationalization changes
967 *** Emacs now supports display and editing of bidirectional text.
968 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
969 displayed in the correct visual order as expected by users of those
970 scripts. The display reordering is a "full bidirectionality" class
971 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
972 with no RTL text should look exactly the same as before.
974 **** New buffer-local variable `bidi-display-reordering'.
975 To disable display reordering in a buffer, change this to nil.
977 **** New buffer-local variable `bidi-paragraph-direction'.
978 If nil (the default), Emacs determines the base direction of each
979 paragraph from its text, as specified by the UBA. Setting the value
980 to `right-to-left' or `left-to-right' forces a base direction on each
983 Paragraphs with right-to-left base direction are displayed starting at
984 the right window edge.
986 *** Enhanced support for characters with no glyphs in available fonts,
987 or, on text terminals, characters that cannot be encoded by the
988 terminal coding system. The new option `glyphless-char-display-control'
989 specifies how to display them: as a hexadecimal code in a box, a thin
990 1-pixel space, an empty box, etc.
992 *** New input methods for Farsi and Bulgarian
993 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
995 *** `nobreak-char-display' now also highlights Unicode hyphen chars
998 *** New Hebrew translation of the Emacs Tutorial.
999 Type `C-u C-h t' to choose it in case your language setup doesn't
1000 automatically select it.
1002 ** An Emacs Lisp package manager is now included.
1003 This is a convenient way to download and install additional packages,
1004 from a package repository at http://elpa.gnu.org.
1006 *** M-x list-packages shows a list of packages, which can be
1007 selected for installation.
1009 *** New command `describe-package', bound to `C-h P'.
1011 *** By default, all installed packages are loaded automatically when
1012 Emacs starts up. To disable this, set `package-enable-at-startup' to
1013 nil. To specify the packages to load, customize `package-load-list'.
1015 ** Custom theme changes
1017 *** New command `M-x customize-themes', which provides a convenient
1018 interface for enabling and disabling Custom themes.
1020 *** New option `custom-theme-load-path' is the load path for themes.
1021 Emacs no longer looks for Custom themes in `load-path'. The default
1022 value of `custom-theme-load-path' says to look for themes in
1023 `custom-theme-directory', followed by a subdirectory of
1024 `data-directory' named "themes/", which contains a small selection of
1025 built-in Custom themes.
1027 *** New option `custom-safe-themes' records known-safe theme files.
1028 If a theme is not in this list, Emacs queries before loading it, and
1029 offers to save the theme to `custom-safe-themes' automatically. By
1030 default, all themes included in Emacs are treated as safe.
1032 ** Improved GTK integration
1034 *** GTK scroll-bars are now placed on the right by default.
1035 The function `set-scroll-bar-mode' can change this.
1037 *** GTK tool bars can have just text, just images or images and text.
1038 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1039 the default is taken from desktop settings.
1041 *** GTK tool bars can be placed on any edge of the frame.
1042 The frame-parameter tool-bar-position controls this. It takes the
1043 values top, left, right or bottom. The Options => Show/Hide menu has
1046 *** The default colors for selected text (the `region' face) are taken
1047 from the GTK theme when Emacs is built with GTK.
1049 *** Emacs uses GTK tooltips by default if built with GTK.
1050 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1052 ** Graphical interface changes
1054 *** On graphical displays, the mode-line no longer ends in dashes.
1055 Also, the first dash (which does not indicate anything) is just
1056 displayed as a space.
1058 *** `menu-bar-select-buffer-function' lets you choose another operation
1059 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1061 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1062 built with Xft. These fonts can be set via X resources, for example:
1063 Emacs.pane.menubar.font: Courier-12
1067 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1068 or if it receives a SIGINT signal in batch mode.
1070 *** `kill-emacs-hook' is now also run in batch mode.
1071 Third-party code which adds to `kill-emacs-hook' should check if they
1072 do the right thing in batch mode.
1074 ** Scrolling changes
1076 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1077 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1078 of buffer at first key-press (instead they move to top/bottom of buffer)
1079 when `scroll-error-top-bottom' is non-nil.
1081 *** New option `scroll-error-top-bottom' (see above).
1083 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1084 scroll a line instead of full screen.
1086 *** New property `scroll-command' should be set on a command's symbol to
1087 define it as a scroll command affected by `scroll-preserve-screen-position'.
1089 *** If you customize `scroll-conservatively' to a value greater than 100,
1090 Emacs will never recenter point in the window when it scrolls due to
1091 cursor motion commands or commands that move point (e.f., `M-g M-g').
1092 Previously, you needed to use `most-positive-fixnum' as the value of
1093 `scroll-conservatively' to achieve the same effect.
1095 *** "Aggressive" scrolling now honors the scroll margins.
1096 If you customize `scroll-up-aggressively' or
1097 `scroll-down-aggressively' and move point off the window, Emacs now
1098 scrolls the window so as to avoid positioning point inside the scroll
1101 ** Basic SELinux support has been added.
1102 This requires Emacs to be linked with libselinux at build time.
1104 *** Emacs preserves the SELinux file context when backing up.
1105 Also, the function `copy-file' has an extra optional argument for
1106 preserving SELinux context, and the return value of `backup-buffer'
1107 now includes the SELinux context.
1109 *** New functions `file-selinux-context' and `set-file-selinux-context'
1110 get and set the SELinux context of a file.
1114 *** `delete-by-moving-to-trash' now only affects commands that specify
1115 trashing. This avoids inadvertently trashing temporary files.
1117 *** Calling `delete-file' or `delete-directory' with a prefix argument
1118 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1120 ** File- and directory-local variable changes
1122 *** You can stop directory local vars from applying to subdirectories.
1123 Add an element (subdirs . nil) to the alist portion of any variables
1124 settings to indicate that the section should not apply to
1127 *** Directory local variables can apply to some file-less buffers.
1128 Affected modes include dired, vc-dir, and log-edit. For example,
1129 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1130 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1131 `hack-dir-local-variables-non-file-buffer' to support this.
1133 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1134 Instead, use "eval: (minor-mode 1)".
1136 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1137 to `inhibit-local-variables-regexps'. As the name suggests, it now
1138 applies to ALL file local variables, not just -*- lines. The
1139 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1144 *** The `quit-window' command now restores the last buffer displayed
1145 in the quitted window.
1147 *** Resizing an Emacs frame now preserves proportional window sizes,
1148 modulo restrictions like window minimum sizes and fixed-size windows.
1150 *** The behavior of `display-buffer' is now customizable in detail.
1152 **** New option `display-buffer-base-action' specifies a list of
1153 user-determined display "actions" (functions and optional arguments
1154 for choosing the displaying window).
1156 This takes precedence over the default display action, which is
1157 specified by `display-buffer-fallback-action'.
1159 **** New option `display-buffer-alist' maps buffer name regexps to
1160 display actions, taking precedence over `display-buffer-base-action'.
1162 *** New option `window-combination-limit'.
1163 The new option `window-combination-limit' allows to return the space
1164 obtained for resizing or creating a window more reliably to the window
1165 from which such space was obtained.
1167 *** New option `window-combination-resize'.
1168 The new option `window-combination-resize' allows to split a window that
1169 otherwise cannot be split because it's too small by stealing space from
1170 other windows in the same combination. Subsequent resizing or deletion
1171 of the window will resize all windows in the same combination as well.
1173 *** New option `frame-auto-hide-function' lets you choose between
1174 iconifying or deleting a frame when burying a buffer in a dedicated
1175 frame, or quitting a window showing a buffer in a frame of its own.
1177 *** New commands `maximize-window' and `minimize-window'.
1178 These maximize and minimize the size of a window within its frame.
1180 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1181 These functions allow to navigate through the live buffers that have
1182 been shown in a specific window.
1184 ** Minibuffer changes
1186 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1187 This is handy for minibuffer-only frames, and is also used for the feature
1188 where mouse-1 pops up *Messages*"', which can now easily be changed.
1190 *** Minibuffers set `truncate-lines' to nil.
1191 If you want to change the value to something else, you could use
1192 for example `minibuffer-setup-hook'.
1194 ** `auto-mode-case-fold' is now enabled by default.
1196 ** `backup-by-copying-when-mismatch' now defaults to t.
1198 ** New basic faces `error', `warning', `success'.
1199 These are used to highlight text indicating failure, caution or
1200 successful operation.
1202 ** New option `list-colors-sort' defines the color sort order
1203 for `list-colors-display'.
1205 ** The variable `focus-follows-mouse' now always defaults to nil.
1208 * Editing Changes in Emacs 24.1
1212 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1213 `isearch-yank-line'.
1215 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1216 `isearch-yank-kill'.
1218 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1220 ** New commands `count-words-region' and `count-words'.
1222 *** M-= is bound to `count-words-region', not `count-lines-region'.
1223 The `count-words-region' command, when called interactively, reports
1224 the number of lines, words, and characters in the region. It is a
1225 superset of the old `count-lines-region', which is now an obsolete
1228 ** The command `just-one-space' (M-SPC), if given a negative argument,
1229 also deletes newlines around point.
1233 *** New option `delete-active-region'.
1234 If non-nil, [delete] and DEL delete the region if it is active and no
1235 prefix argument is given. If set to `kill', those commands kill
1238 *** New command `delete-forward-char', bound to [delete].
1239 This is meant for interactive use, and obeys `delete-active-region'.
1240 The command `delete-char' does not obey `delete-active-region'.
1242 *** `delete-backward-char' is now a Lisp function.
1243 Apart from obeying `delete-active-region', its behavior is unchanged.
1244 However, the byte compiler now warns if it is called from Lisp; Lisp
1245 callers should use delete-char with a negative argument instead.
1247 *** The option `mouse-region-delete-keys' has been deleted.
1249 ** Selection changes.
1251 The default handling of clipboard and primary selections has been
1252 changed to conform with modern X applications. In short, most
1253 commands for killing and yanking text now use the clipboard, while
1254 mouse commands use the primary selection.
1256 In the following, we provide a list of these changes, followed by a
1257 list of steps to get the old behavior back if you prefer that.
1259 *** `select-active-regions' now defaults to t.
1260 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1261 the kill ring. The selected text is put in the primary selection, if
1262 the system possesses a separate primary selection facility (e.g. X).
1264 **** `select-active-regions' also accepts a new value, `only'.
1265 This means to only set the primary selection for temporarily active
1266 regions (usually made by mouse-dragging or shift-selection);
1267 "ordinary" active regions, such as those made with C-SPC followed by
1268 point motion, do not alter the primary selection.
1270 **** `mouse-drag-copy-region' now defaults to nil.
1272 *** mouse-2 is now bound to `mouse-yank-primary'.
1273 This pastes from the primary selection, ignoring the kill-ring.
1274 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1276 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1278 *** `x-select-enable-primary' now defaults to nil.
1279 Thus, commands that kill text or copy it to the kill-ring (such as
1280 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1282 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1283 exactly equivalent to M-w, C-w, and C-y respectively.
1285 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1286 non-nil by default, as Windows does not support the primary selection
1287 between applications.
1289 *** To return to the previous behavior, do the following:
1291 **** Change `select-active-regions' to nil.
1292 **** Change `mouse-drag-copy-region' to t.
1293 **** Change `x-select-enable-primary' to t (on X only).
1294 **** Change `x-select-enable-clipboard' to nil.
1295 **** Bind `mouse-yank-at-click' to mouse-2.
1297 *** Support for X cut buffers has been removed.
1299 *** X clipboard managers are now supported.
1300 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1302 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1303 in the current rectangle. With a prefix argument, this prompts for a
1304 number to count from and for a format string.
1306 ** `redisplay-dont-pause' now defaults to t.
1307 This makes Emacs feel more responsive to editing commands that arrive
1308 at high rate, e.g. if you lean on some key, because stopping redisplay
1309 in the middle (when this variable is nil) forces more expensive
1310 updates later on, and Emacs appears to be unable to keep up.
1312 ** The behavior of <TAB> for active regions in Text mode has changed.
1313 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1314 when the region is active causes Emacs to indent all the lines in the
1315 region, aligning them with the line previous to the first line in the
1316 region (or with the left margin if there is no previous line).
1318 ** When `occur' is called with a prefix argument, matching strings are
1319 collected into the `*Occur*' buffer without line numbers. If there
1320 are parenthesized subexpressions in the specified regexp, `occur'
1321 reads replacement text that may contain \\& and \\N whose convention
1322 follows `replace-match'.
1325 * Changes in Specialized Modes and Packages in Emacs 24.1
1327 ** Archive Mode has basic support for browsing and updating 7z archives.
1331 *** BibTeX mode now supports biblatex.
1332 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1333 `bibtex-entry-field-alist' is now an obsolete alias for
1334 `bibtex-BibTeX-entry-alist'.
1336 *** New command `bibtex-search-entries', bound to C-c C-a.
1338 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1340 *** New variable `bibtex-search-entry-globally'.
1344 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1346 *** The default browser used by the package is now the "xdg-open" program,
1347 on platforms that support it. This calls your desktop's preferred browser.
1349 ** Calendar, Diary, and Appt
1351 *** Diary entries can contain non-printing "comments".
1352 See the variable `diary-comment-start'.
1354 *** Appointments can specify their individual warning times.
1355 See the variable `appt-warning-time-regexp'.
1357 *** The function specified by `appt-disp-window-function' may be passed
1358 lists of arguments if multiple appointments are due at similar times.
1359 If you are using a custom function for this, you should update it.
1361 *** New function `diary-hebrew-birthday'.
1363 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1364 may no longer be nil, but must all be strings.
1366 *** The obsolete (since Emacs 22.1) method of enabling the appt
1367 package by adding `appt-make-list' to `diary-hook' has been removed.
1368 Use `appt-activate' instead.
1370 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1371 appt-issue-message (use the function appt-activate)
1372 appt-visible/appt-msg-window (use the variable appt-display-format)
1374 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1375 view-diary-entries, list-diary-entries, show-all-diary-entries
1379 *** New feature to "guess" the style in an existing buffer.
1380 The main entry point is M-x c-guess.
1382 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1384 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1385 Thus C-M-a will, by default, go to the beginning of the immediate function,
1388 *** "Macros with semicolons" can be registered for correct indentation.
1389 Where such a macro ends a line (no semicolon) the next statement is no longer
1390 parsed as a statement continuation.
1392 ** Comint and modes derived from it use the standard completion code.
1396 *** Compilation mode can be used without Font Lock mode.
1397 `compilation-parse-errors-function' is now obsolete.
1399 *** New variable `compilation-filter-start', which is bound while
1400 `compilation-filter-hook' runs. It records the start position of the
1401 text inserted by `compilation-filter'.
1403 *** `compilation-error-screen-columns' and `compilation-first-column'
1404 are obeyed in the editing buffer. So programming language modes can
1405 set them, whereas previously only the value in the *Compilation*
1410 *** Customize buffers now contain a search field.
1411 The search is performed using `customize-apropos'.
1412 To turn off the search field, set `custom-search-field' to nil.
1414 *** Options in customize group buffers start out hidden if not customized.
1415 Use the arrow to the left of the option name to toggle visibility.
1417 *** custom-buffer-sort-alphabetically now defaults to t.
1419 *** The color widget now has a "Choose" button, which allows you to
1420 choose a color via `list-colors-display'.
1424 *** It is now possible to access buses other than the default system
1427 *** The `dbus-register-method' and `dbus-register-property' functions
1428 optionally do not register names.
1430 *** The new function `dbus-register-service' registers a known service
1431 name on a D-Bus without also registering a property or a method.
1435 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1436 if called with a prefix argument, read a file name from the minibuffer
1437 instead of using the current buffer.
1439 *** The "dired local variables" feature of Dired-x is obsolete.
1440 The standard directory local variables feature replaces it.
1444 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1445 controlling attempts to autojoin a channel.
1447 *** New variable `erc-coding-system-precedence': If we use `undecided'
1448 as the server coding system, this variable will then be consulted.
1449 The default is to decode strings that can be decoded as utf-8 as
1450 utf-8, and do the normal `undecided' decoding for the rest.
1454 *** The default value of `eshell-directory-name' has changed
1455 to be an "eshell" directory in `user-emacs-directory'.
1456 The old "~/.eshell/" directory is still used if it exists, though.
1460 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1461 It now supports multithread non-stop debugging and simultaneous
1462 debugging of several threads.
1466 *** RET (`image-toggle-animation') toggles animation, if applicable.
1467 Animation plays once, unless the option `image-animate-loop' is non-nil.
1471 *** New command M-x info-display-manual displays a named Info manual.
1472 If that manual is already visited in some Info buffer, it displays
1473 that buffer. (This is handy if you have many manuals in many *info*
1474 buffers, and don't remember the name of the buffer visiting the manual
1475 you want to consult.) Otherwise, it loads and displays the manual.
1477 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1478 This is for compatibility with the stand-alone Info reader program,
1479 and also because `Info-edit' is a rarely used command that is disabled
1482 ** Mail mode changes (not Message mode)
1484 *** New command M-x mail-add-attachment for adding MIME attachments
1486 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1487 (Its name is misleading, since it has nothing to do with MIME
1488 attachments.) The old name is now an obsolete alias to the new name.
1490 ** MH-E has been updated to MH-E version 8.3.1.
1491 See MH-E-NEWS for details.
1493 ** Modula-2 mode provides auto-indentation.
1495 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1497 ** nXML mode no longer binds C-RET to `nxml-complete'.
1498 Completion is now performed via `completion-at-point', bound to C-M-i
1499 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1500 default), this performs tag completion.
1502 ** Org mode has been updated to version 7.8.09.
1503 See ORG-NEWS for details.
1505 ** Prolog mode has been completely revamped, with lots of additional
1506 functionality such as more intelligent indentation, electricity,
1507 support for more variants, including Mercury, and a lot more.
1511 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1512 in the Rmail incoming message.
1514 *** The variable `rmail-message-filter' no longer has any effect.
1515 This change was made in Emacs 23.1 but was not advertised at the time.
1516 Try using `rmail-show-message-hook' instead.
1520 *** M-x shell prompts for the shell path name if the default directory
1521 is a remote file name and neither the environment variable $ESHELL nor
1522 the variable `explicit-shell-file-name' is set.
1524 *** TAB is now bound to the standard `completion-at-point' command,
1525 which now implements the pcomplete rules for shell command completion.
1529 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1530 if the mail server supports them. This uses either built-in GnuTLS
1531 support, or the starttls.el library. Customize `smtpmail-stream-type'
1534 *** The variable `smtpmail-auth-credentials' has been removed.
1535 By default, the information is now stored in the file ~/.authinfo.
1536 This was the default value of smtpmail-auth-credentials. If you had
1537 customized smtpmail-auth-credentials to a list of user names and
1538 passwords, those settings are not used. During your first connection
1539 to the smtp server, Emacs will prompt for the user name and password,
1540 and offer to save them to ~/.authinfo. Or you can manually copy the
1541 credentials to ~/.authinfo. For example, if you had
1543 (setq smtpmail-auth-credentials
1544 '(("mail.example.org" 25 "jim" "s!cret")))
1546 then the equivalent line in ~/.authinfo would be
1548 machine mail.example.org port 25 login jim password s!cret
1550 See the auth-source manual for more information, e.g. on encrypting
1551 the credentials file.
1553 *** The variable `smtpmail-starttls-credentials' has been removed.
1554 If you had that set, you need to put
1556 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1558 in your ~/.authinfo file instead.
1560 *** SMTPmail defaults to using the address in the From: header as the
1561 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1562 to the address you wish to use instead.
1566 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1567 and `sql-oracle-scan-on'.
1569 *** New options controlling prompting for login parameters.
1570 Each supported product has a custom variable `sql-*-login-params',
1571 which is a list of the parameters to be prompted for before a
1572 connection is established.
1574 *** The command `sql-product-interactive' now takes a prefix argument,
1575 which causes it to prompt for an SQL product.
1577 *** Product-specific SQL interactive commands now take prefix arguments.
1578 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1579 given a prefix argument, prompt for a name for the SQL interactive
1580 buffer. This reduces the need for calling `sql-rename-buffer'.
1582 *** SQL interactive modes suppress command continuation prompts, and
1583 replace tabs with spaces. The first change impacts multiple line SQL
1584 statements entered with C-j between each line, statements yanked into
1585 the buffer and statements sent with `sql-send-*' functions. The
1586 second prevents the MySQL and Postgres interpreters from listing
1587 object name completions when sent text via `sql-send-*' functions.
1589 *** New command `sql-connect' starts a predefined SQLi session,
1590 using the login parameters from `sql-connection-alist'.
1592 *** New "Save Connection" menu item in SQLi buffers.
1593 This gathers the login params specified for the SQLi session, if it
1594 was not started by a connection, and saves them as a new connection.
1596 *** New commands for listing database objects and details:
1597 sql-list-all and sql-list-table.
1599 *** An API for manipulating SQL product definitions has been added.
1603 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1607 *** New inline access method "ksu" (kerberized su).
1609 *** The following access methods are discontinued: "ssh1_old",
1610 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1612 *** The user option `remote-file-name-inhibit-cache' controls whether
1613 remote file attributes are cached for better performance.
1615 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1616 default value to "".
1618 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1619 for remote machines which support SELinux.
1621 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1622 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1623 the degree of parallelism.
1625 ** VC and related modes
1627 *** Support for pulling on distributed version control systems.
1628 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1629 supported (currently with Bzr, Git, and Mercurial), to update the
1630 current branch and working tree. A prefix argument means to prompt
1631 the user for specifics, e.g. a pull location.
1633 *** `vc-update' is now an alias for `vc-pull'.
1635 *** Support for merging on distributed version control systems.
1636 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1637 is supported (currently with Bzr, Git, and Mercurial), to merge
1638 changes from another branch into the current one. It prompts for
1639 specifics, e.g. a merge source.
1641 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1642 shows a diff while querying the user. It defaults to t.
1644 *** Log entries in some Log View buffers can be toggled to display a
1645 longer description by typing RET (log-view-toggle-entry-display).
1646 This is currently supported for Bzr, Git, and Mercurial (to support
1647 another backend, define a `log-view-expanded-log-entry-function').
1648 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1649 use this to display the full log entry for the revision at point.
1651 *** New command `vc-ediff' allows visual comparison of two revisions
1652 of a file similar to `vc-diff', but using ediff backend.
1654 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1655 this was not advertised at the time.
1657 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1658 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1659 this was not advertised at the time.
1665 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1667 *** partial-completion-mode (complete.el) is obsolete.
1668 You can get a comparable behavior with:
1669 (setq completion-styles '(partial-completion initials))
1670 (setq completion-pcm-complete-word-inserts-delimiters t)
1672 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1674 *** pgg is obsolete (use EasyPG instead).
1676 *** sregex.el is obsolete, since rx.el is a strict superset.
1678 *** s-region.el and pc-select.el are obsolete.
1679 They are superseded by shift-select-mode, enabled by default since 23.1.
1681 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1685 *** The Landmark game is now invoked with `landmark', not `lm'.
1686 Its functions and variables have been similarly renamed.
1688 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1689 (This interfered with cua-mode.)
1691 *** f90.el has some support for Fortran 2008 syntax.
1693 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1695 *** New command `nato-region' converts text to NATO phonetic alphabet.
1698 * New Modes and Packages in Emacs 24.1
1700 ** Occur Edit mode applies edits made in *Occur* buffers to the
1701 original buffers. It is bound to "e" in Occur mode.
1703 ** New global minor mode electric-pair-mode.
1704 When enabled, typing an open parenthesis automatically inserts the
1705 matching closing one.
1707 ** New global minor mode electric-indent-mode.
1708 When enabled, typing certain characters triggers reindentation.
1709 Major modes wishing to use this can set electric-indent-chars or
1710 electric-indent-functions.
1712 ** New global minor mode electric-layout-mode.
1713 When enabled, typing certain characters automatically inserts newlines.
1714 Major modes wishing to use this can set electric-layout-rules.
1716 ** tabulated-list.el provides a generic major mode for tabulated data,
1717 from which other modes can be derived.
1719 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1721 ** secrets.el is an implementation of the Secret Service API, an
1722 interface to password managers like GNOME Keyring or KDE Wallet. The
1723 Secret Service API requires D-Bus for communication. The command
1724 `secrets-show-secrets' offers a buffer with a visualization of the
1727 ** notifications.el provides an implementation of the Desktop
1728 Notifications API. It requires D-Bus for communication.
1730 ** soap-client.el supports access to SOAP web services from Emacs.
1731 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1733 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1735 ** New emacs-lock.el package.
1736 The previous version has been moved to obsolete/old-emacs-lock.el.
1737 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1738 against exiting Emacs and killing the buffer can be set separately.
1739 The mechanism for automatically turning off protection for buffers
1740 with dead inferior processes has been generalized.
1743 * Incompatible Lisp Changes in Emacs 24.1
1745 ** Passing a nil argument to a minor mode function call now ENABLES
1746 the minor mode unconditionally. This is so that you can write e.g.
1748 (add-hook 'text-mode-hook 'foo-mode)
1750 to enable foo-mode in Text mode buffers, removing the need for
1751 `turn-on-foo-mode' style functions. This affects all mode commands
1752 defined by `define-minor-mode'. If called interactively, the mode
1753 command still toggles the minor mode.
1755 ** The return value of `backup-buffer' has changed.
1756 It is now a list of three elements, where the second element is a list
1757 describing the original file's SELinux context. If Emacs or the
1758 system lacks SELinux support, the context list is (nil nil nil nil).
1759 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1761 ** `char-direction-table' and the `char-direction' function were deleted.
1762 They were buggy and inferior to the new support of bidirectional
1763 editing introduced in Emacs 24. If you need the bidirectional
1764 properties of a character, use `get-char-code-property' with the last
1765 argument `bidi-class'.
1767 ** `copy-directory' now copies the source directory as a subdirectory
1768 of the target directory, if the latter is an existing directory. The
1769 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1770 the contents directly into a pre-existing target directory.
1772 ** For mouse click input events in the text area, the Y pixel
1773 coordinate in the POSITION list now counts from the top of the text
1774 area, excluding any header line. Previously, it counted from the top
1777 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1778 been further reduced. Now a backquote not followed by a space is
1779 always treated as a "new-style" backquote. Please remove all
1780 "old-style" backquotes from your code. If your code uses backquotes
1781 as documented in the Elisp manual, and compiles without warning, then
1782 you have nothing to do in this regard. Code not following the
1783 appropriate conventions may fail to compile.
1785 The most common cause of trouble seems to be an old-style backquote
1786 followed by a newline. Another cause of trouble is vector notation
1787 for key sequence notation: instead of [(control ,)] and [(control ')],
1788 you should write [(control ?,)] and [(control ?')], which will work in
1791 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1792 was not advertised at the time. The function `custom-initialize-delay'
1793 replaced all known uses.
1795 ** `view-buffer' now treats special mode-class in the same way that
1796 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1797 major mode is special).
1799 ** Menu and tool bar changes
1801 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1802 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1803 With these alist entries omitted, `make-frame' checks the value of the
1804 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1805 a menu-bar or tool-bar, respectively. If the alist entries are added,
1806 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1808 *** The menu bar bindings's caches are not used any more.
1809 Use (where-is-internal <def> nil t) instead.
1811 ** Regions created by mouse dragging are now normal active regions,
1812 similar to those created by shift-selection (see Selection changes
1813 above). In previous Emacs versions, these regions were delineated by
1814 `mouse-drag-overlay'; that variable has been removed.
1816 ** The fourth argument of `filter-buffer-substring' has been removed.
1817 If you want to remove text properties from the final result, simply
1818 pass the result through substring-no-properties.
1820 ** cl.el no longer provides `cl-19'.
1822 ** The following obsolete functions and aliases have been removed
1823 (the appropriate new function is given in parentheses; "not needed"
1824 means you can just remove all calls to the function in question):
1826 *** `comint-kill-output' (`comint-delete-output')
1827 *** `decompose-composite-char' (`char-to-string')
1828 *** `outline-visible' (`outline-invisible-p')
1829 *** `internal-find-face' (`facep')
1830 *** `internal-get-face' (`facep and check-face')
1831 *** `frame-update-faces' (not needed)
1832 *** `frame-update-face-colors' (`frame-set-background-mode')
1833 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1834 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1835 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1836 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1837 *** `x-make-font-unbold' (`make-face-unbold')
1838 *** `x-make-font-unitalic' (`make-face-unitalic')
1839 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1840 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1841 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1842 *** `char-bytes' (== 1)
1843 *** `isearch-return-char' (`isearch-printing-char')
1844 *** `make-local-hook' (not needed)
1845 *** `set-screen-height' (`set-frame-height')
1846 *** `set-screen-width' (`set-frame-width')
1848 ** The following obsolete variables and varaliases have been removed
1849 (the appropriate new variable is given in parentheses):
1851 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1852 *** `vc-header-alist' (`vc-BACKEND-header')
1853 *** `directory-sep-char' (== ?/)
1854 *** `font-lock-defaults-alist' (`font-lock-defaults')
1855 *** `e' (`float-e').
1857 ** The following obsolete files were removed:
1858 sc.el, x-menu.el, rnews.el, rnewspost.el
1860 ** The format of the finder-inf.el file has changed, since the Finder
1861 mechanism is now based on the package system. The variable
1862 `finder-package-info' is replaced by `package--builtins' and
1863 `finder-keywords-hash'.
1865 ** When generating autoloads, `update-directory-autoloads' no longer
1866 assumes every inspected file is in your `load-path'. It instead
1867 generates relative names according to the current `load-path'.
1870 * Lisp changes in Emacs 24.1
1872 ** Code can now use lexical scoping by default instead of dynamic scoping.
1873 The `lexical-binding' variable enables lexical scoping for local
1874 variables. It is typically set via a file-local variable in the first
1875 line of the file, in which case it applies to all the code in that
1878 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1879 binding instead of the old dynamic binding mode.
1881 *** Lexically scoped interpreted functions are represented with a new form
1882 of function value which looks like (closure ENV ARGS &rest BODY).
1884 *** New macro `letrec' to define recursive local functions.
1886 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1887 So do `defcustom' and other forms that call `defvar' as a subroutine.
1889 *** New function `special-variable-p' to check whether a variable is
1890 declared as dynamically bound.
1892 *** The form ((lambda ...) ...) is deprecated.
1894 ** An Emacs Lisp testing tool is now included.
1895 Emacs Lisp developers can use this tool to write automated tests for
1896 their code. See the ERT info manual for details.
1898 ** Changes for bidirectional display and editing
1900 *** New function `current-bidi-paragraph-direction'.
1901 This returns the base direction of the paragraph at point.
1903 *** New function `bidi-string-mark-left-to-right'.
1904 Given a string containing characters from right-to-left scripts, this
1905 function returns another string which can be safely inserted into a
1906 buffer, such that any following text will be always displayed to the
1907 right of that string. (This works by appending an invisible Unicode
1908 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
1910 This is useful when the buffer has overall left-to-right paragraph
1911 direction and you need to insert a string whose contents are not known
1912 in advance, without disrupting the layout of the line.
1916 *** Window tree functions are accessible in Elisp.
1917 Functions are provided to return the parent, siblings or child windows
1918 of any window including internal windows (windows not associated with a
1919 buffer) in the window tree.
1921 **** New function `window-valid-p' gives non-nil for live and internal
1924 **** Window manipulation can deal with internal windows.
1925 Many window handling functions like `split-window', `delete-window', or
1926 `delete-other-windows' as well as the window resizing functions can now
1927 act on any window including internal ones.
1929 *** window-total-height/-width vs window-body-height/-width.
1930 The function `window-height' has been renamed to `window-total-height'
1931 and `window-width' has been renamed to `window-body-width'. The old
1932 names are provided as aliases. Two new functions `window-total-width'
1933 and `window-body-height' are provided.
1935 *** Window parameters specific to window handling functions.
1936 For each window you can specify a parameter to override the default
1937 behavior of a number of functions like `split-window', `delete-window'
1938 and `delete-other-windows'. The variable `ignore-window-parameters'
1939 allows to ignore processing such parameters.
1941 *** New semantics of third argument of `split-window'.
1942 The third argument of `split-window' has been renamed to SIDE and can be
1943 set to any of the values 'below, 'right, 'above, or 'left to make the
1944 new window appear on the corresponding side of the window that shall be
1945 split. Any other value of SIDE will cause `split-window' to split the
1946 window into two side-by-side windows as before.
1948 *** Window resizing functions.
1949 A new standard function for resizing windows called `window-resize' has
1950 been introduced. This and all other functions for resizing windows no
1951 longer delete any windows when they become too small.
1953 *** Deleting the selected window now selects the most recently selected
1954 live window on that frame instead.
1956 *** `adjust-window-trailing-edge' adjustments.
1957 `adjust-window-trailing-edge' can now deal with fixed-size windows and
1958 is able to resize other windows if a window adjacent to the trailing
1959 edge cannot be shrunk any more. This makes its behavior more similar to
1960 that of Emacs 21 without compromising, however, its inability to delete
1961 windows which was introduced in Emacs 22.
1963 *** Window-local buffer lists.
1964 Windows now have local buffer lists. This means that removing a buffer
1965 from display in a window will preferably show the buffer previously
1966 shown in that window with its previous window-start and window-point
1967 positions. This also means that the same buffer may be automatically
1968 shown twice even if it already appears in another window.
1970 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1971 which if non-nil requires the buffer to be displayed in the currently
1972 selected window, signaling an error otherwise. If nil, another window
1973 can be used, e.g. if the selected one is strongly dedicated.
1975 *** `split-window-vertically' and `split-window-horizontally' renamed
1976 to `split-window-below' and `split-window-right' respectively.
1977 The old names are kept as aliases.
1981 **** The second arg to `display-buffer' and `pop-to-buffer' is now
1982 named ACTION, and takes a display action of the same form as
1983 `display-buffer-base-action' (see Changes, above). A non-nil,
1984 non-list value is treated specially, as the old meaning.
1986 **** New variable `display-buffer-overriding-action'.
1988 **** The procedure of `display-buffer' etc. to choose a window is
1989 determined by combining `display-buffer-overriding-action',
1990 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1991 and `display-buffer-fallback-action'. The second and fourth of these
1992 are user-customizable variables.
1994 See the docstring of `display-buffer' for details.
1996 *** New functions `window-state-get' and `window-state-put'.
1997 These functions allow to save and restore the state of an arbitrary
1998 frame or window as an Elisp object.
2002 *** New variable `completion-extra-properties' used to specify extra
2003 properties of the current completion:
2004 - :annotate-function, same as the old completion-annotate-function.
2005 - :exit-function, function to call after completion took place.
2007 *** Functions on `completion-at-point-functions' can return any of the
2008 properties valid for `completion-extra-properties'.
2010 *** `completion-annotate-function' is obsolete.
2012 *** New `metadata' method for completion tables. The metadata thus returned
2013 can specify various details of the data returned by `all-completions':
2014 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2015 used to select a style in completion-category-overrides.
2016 - `annotation-function' to add annotations in *Completions*.
2017 - `display-sort-function' to specify how to sort entries in *Completions*.
2018 - `cycle-sort-function' to specify how to sort entries when cycling.
2020 *** `minibuffer-local-filename-must-match-map' is not used any more.
2021 Instead, the bindings in `minibuffer-local-filename-completion-map'
2022 are combined with `minibuffer-local-must-match-map'.
2024 *** New variable `completing-read-function' allows overriding the
2025 behavior of `completing-read'.
2027 ** `glyphless-char-display' can now distinguish between graphical and
2028 text terminal display, via a char-table entry that is a cons cell.
2030 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2031 Instead, the offending function is removed.
2035 *** New function `run-hook-wrapped' for running an abnormal hook by
2036 passing the hook functions as arguments to a "wrapping" function.
2037 Like `run-hook-with-args-until-success', it stops at the first
2038 non-nil return value.
2040 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2041 set of "wrapping" filters, similar to around advice.
2042 (A version of this macro was actually added in Emacs 23.2 but was not
2043 advertised at the time.)
2047 *** New macro `condition-case-unless-debug' (this was actually added in
2048 Emacs 23.1 as condition-case-no-debug, but not advertised)
2050 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2052 *** Variable `stack-trace-on-error' removed.
2054 *** The debugger can now "continue" from an error, which means it will
2055 jump to the error handler as if the debugger had not been invoked
2056 instead of jumping all the way to the top-level.
2058 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2059 This can be useful when `inhibit-quit' is set.
2061 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2062 named Emacs server instances.
2064 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2065 to redirect STDOUT to a file.
2067 ** The function `format-time-string' now supports the %N directive,
2068 for higher-resolution time stamps.
2070 ** New input reading functions
2072 *** New function `read-char-choice' reads a restricted set of
2073 characters, discarding any inputs not inside the set.
2075 *** The command `read-color' now requires a match for a color name
2076 or RGB triplet, instead of signaling an error if the user provides
2079 **** `facemenu-read-color' is now an alias for `read-color'.
2081 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2082 The variable is now used to load all kind of supported dynamic libraries,
2083 not just image libraries. The previous name is still available as an
2086 ** Syntax parsing changes
2088 *** New variable `syntax-propertize-function'.
2089 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2090 This allows syntax-table properties to be set independently from font-lock:
2091 just call syntax-propertize to make sure the text is propertized.
2092 Together with this new variable come a new hook
2093 syntax-propertize-extend-region-functions, as well as two helper functions:
2094 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2095 as-is; and syntax-propertize-rules which provides a new way to specify
2098 *** Syntax tables support a new "comment style c" additionally to style b.
2100 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2102 ** frame-local variables cannot be let-bound any more.
2104 ** Major and minor mode changes
2106 *** `set-auto-mode' now respects mode: local variables at the end of files,
2107 as well as those in the -*- line.
2109 *** `prog-mode' is a new major mode from which programming modes
2112 **** `prog-mode-hook' can be used to enable features for programming
2113 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2114 on-the-fly spell checking for comments and strings.
2116 *** New hook `change-major-mode-after-body-hook', run by
2117 `run-mode-hooks' just before any other mode hooks.
2119 *** Enabled globalized minor modes can be disabled in specific major modes.
2120 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2121 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2123 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2125 ** File-handling changes
2127 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2128 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2129 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2130 argument is supplied (see Trash changes, above).
2132 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2134 ** Tool-bars can display separators.
2135 Tool-bar separators are handled like menu separators in menu-bar maps,
2136 i.e. via menu entries of the form `(menu-item "--")'.
2140 *** Animated images support (currently animated gifs only).
2142 **** `image-animated-p' returns non-nil if an image can be animated.
2144 **** `image-animate' animates a supplied image spec.
2146 **** `image-animate-timer' returns the timer object for an image that
2149 *** `image-extension-data' has been renamed to `image-metadata'.
2150 The old name is an obsolete alias to the new one.
2152 *** Image mode can view any image type that ImageMagick supports.
2153 This requires Emacs to be built with ImageMagick support.
2155 **** New function `imagemagick-types', defined if ImageMagick support
2156 is enabled, returns a list of image file extensions that your
2157 ImageMagick installation supports.
2159 **** New function `imagemagick-register-types' enables ImageMagick
2160 image types in Image mode and in `create-image' and other helper
2163 **** New option `imagemagick-types-inhibit' excludes certain
2164 ImageMagick image types from `imagemagick-register-types'.
2166 **** With ImageMagick support, there are extra Image mode commands to
2167 resize and rotate images: `image-transform-fit-to-height',
2168 `image-transform-fit-to-width', `image-transform-set-rotation', and
2169 `image-transform-set-scale'.
2171 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2172 passes it to the mail user agent function. This argument specifies an
2173 action for returning to the caller after finishing with the mail. For
2174 example, this is used by Rmail to optionally delete a mail window.
2176 ** XML and HTML parsing
2177 If Emacs is compiled with libxml2 support, there are two new
2178 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2179 and `libxml-parse-xml-region' (which parses XML). Both return an
2180 Emacs Lisp parse tree.
2182 ** Networking and encryption changes
2184 *** `open-network-stream' can now be used to open an encrypted stream.
2185 It now accepts an optional `:type' parameter for initiating a TLS
2186 connection, directly or via STARTTLS. To do STARTTLS, additional
2187 parameters (`:end-of-command', `:success', `:capabilities-command')
2188 must also be supplied.
2190 *** New library gnutls.el.
2191 The new function `gnutls-available-p' returns non-nil if Emacs is
2192 built with GnuTLS support. The main entry points are
2193 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2194 these functions through `open-network-stream', because that can
2195 upgrade connections through STARTTLS opportunistically or use plain
2196 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2199 *** New primitive `secure-hash' that supports many secure hash algorithms:
2200 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2201 sha1.el has been removed. The `sha1' feature is provided by default.
2205 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2207 ** Progress reporters can now "spin".
2208 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2209 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2210 time you call `progress-reporter-update' on that progress reporter,
2211 with a nil or omitted VALUE argument, the reporter message is
2212 displayed with a "spinning bar".
2214 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2215 being reverted, even if the buffer has a local `revert-buffer-function'.
2217 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2218 If delayed-warnings-list is non-nil, the command loop calls
2219 `delayed-warnings-hook' after `post-command-hook'. At present, this
2220 is only used by Emacs on some platforms to display warnings during
2221 startup, which might otherwise not be noticed. This uses the
2222 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2224 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2226 ** New function `make-composed-keymap' that constructs a new keymap
2227 from multiple input maps. You can use this to make a keymap that
2228 inherits from multiple maps, eg:
2229 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2231 ** New function `string-prefix-p'.
2232 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2234 ** New reader macro ## that stands for the empty symbol.
2235 This means that the empty symbol can now be read back. Also, #: by itself
2236 (when not immediately followed by a possible symbol character) stands for
2237 an empty uninterned symbol.
2239 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2241 ** The following functions and variables are obsolete:
2243 *** `tooltip-use-echo-area' is obsolete.
2244 Rather than setting this to t, disable Tooltip mode instead.
2246 *** buffer-substring-filters is obsolete.
2247 Use `filter-buffer-substring-functions' instead.
2249 *** `byte-compile-disable-print-circle' is obsolete.
2251 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2252 Use `post-command-hook' instead.
2254 *** `font-lock-maximum-size' is obsolete.
2257 * Changes in Emacs 24.1 on non-free operating systems
2259 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2260 and also when HOME is set to C:\ by default.
2262 ** New configure.bat options
2264 *** --enable-checking builds Emacs with extra runtime checks.
2266 *** --distfiles specifies files to be included in binary distribution.
2268 *** --without-gnutls disables automatic GnuTLS detection.
2270 *** --lib for general library linkage, works with the USER_LIBS build variable.
2272 ** New make target `dist' to create binary distribution for MS Windows.
2274 ** The Lisp function `w32-default-color-map' is now obsolete.
2275 (It is only used internally in the Emacs C code.)
2277 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2278 reappear on mouse-over. (Requires OS X 10.6 or later.)
2280 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2281 other platforms, rather than inserting its contents into the buffer.
2284 ----------------------------------------------------------------------
2285 This file is part of GNU Emacs.
2287 GNU Emacs is free software: you can redistribute it and/or modify
2288 it under the terms of the GNU General Public License as published by
2289 the Free Software Foundation, either version 3 of the License, or
2290 (at your option) any later version.
2292 GNU Emacs is distributed in the hope that it will be useful,
2293 but WITHOUT ANY WARRANTY; without even the implied warranty of
2294 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2295 GNU General Public License for more details.
2297 You should have received a copy of the GNU General Public License
2298 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2303 paragraph-separate: "[
\f]*$"