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
27 ** The default toolkit has been changed to Gtk+ version 3.
28 If you don't pass --with-x-toolkit to configure or if you pass
29 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
30 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
31 You can explicitly require a specific version by passing
32 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
35 ** New configure option '--without-all' to disable additional features.
36 This disables most of the features that are normally enabled by default.
39 ** New configure option '--enable-link-time-optimization' to utilize
40 an appropriate feature provided by GCC since version 4.5.0.
43 ** New configure option '--enable-gcc-warnings', intended for developers.
44 If building with GCC, this enables compile-time checks that warn about
45 possibly-questionable C code. On a recent GNU system there should be
46 no warnings; on older and on non-GNU systems the generated warnings
50 ** The configure option '--enable-use-lisp-union-type' has been
51 renamed to '--enable-check-lisp-object-type', as the resulting
52 Lisp_Object type no longer uses a union to implement the compile time
53 check that this option enables.
56 ** The configure option '--disable-maintainer-mode' has been removed,
57 as it was confusingly-named and rarely useful.
60 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
61 overwriting "emacs" in the installation bin/ directory with a link
65 ** The configure options `--program-prefix', `--program-suffix', and
66 `--program-transform-name' apply to more than just the installed
67 binaries. Now they also affect the man pages, icons, and the
68 etc/emacs.desktop file; but not the info pages, since this would break
69 links between the various manuals.
72 ** Emacs uses libtinfo in preference to libncurses, if available.
75 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
76 /usr/pkg/lib to the linker search path. You must add them yourself if
80 ** The standalone scripts rcs-checkin and vcdiff have been removed
81 (from the bin and libexec directories, respectively). The former is
82 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
85 * Startup Changes in Emacs 24.3
88 ** Emacs no longer searches for `leim-list.el' files beneath the standard
89 lisp/ directory. There should not be any there anyway. If you have
90 been adding them there, put them somewhere else, eg site-lisp.
93 ** The `--no-site-lisp' command line option now works for Nextstep builds.
96 * Changes in Emacs 24.3
99 ** Most y-or-n prompts now allow you to scroll the selected window.
100 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
101 respectively, without exiting from the prompt.
105 *** New option `mode-line-default-help-echo' specifies the help text
106 (shown in a tooltip or in the echo area) for any part of the mode line
107 that does not have its own specialized help text.
109 *** You can now click mouse-3 in the coding system indicator to invoke
110 `set-buffer-file-coding-system'.
115 *** `C-h f' (describe-function) can now perform autoloading.
116 When this command is called for an autoloaded function whose docstring
117 contains a key substitution construct, that function's library is
118 automatically loaded, so that the documentation can be shown
119 correctly. To disable this, set `help-enable-auto-load' to nil.
122 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
123 even after their associated libraries have been loaded (and the
124 autoloads have been redefined as functions).
126 ** Minibuffer changes
128 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
129 next and previous path separator, respectively.
131 *** minibuffer-electric-default-mode can rewrite (default ...) to [...].
132 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
135 ** ImageMagick support, if available, is automatically enabled.
136 It is no longer necessary to call `imagemagick-register-types'
137 explicitly to install ImageMagick image types; that function is called
138 automatically at startup, or when customizing an imagemagick- option.
140 *** Setting `imagemagick-types-inhibit' to t now disables the use of
141 ImageMagick to view images. You must call imagemagick-register-types
142 afterwards if you do not use customize to change this.
144 *** The new variable `imagemagick-enabled-types' also affects which
145 ImageMagick types are treated as images. The function
146 `imagemagick-filter-types' returns the list of types that will be
149 *** Images displayed via ImageMagick now support transparency and the
150 :background image spec property.
152 ** Server and client changes
154 *** emacsclient now obeys string values for `initial-buffer-choice',
155 if it is told to open a new frame without specifying any file to visit
156 or expression to evaluate.
158 *** New option `server-auth-key' specifies a shared server key.
161 ** In the Package Menu, newly-available packages are listed as "new",
162 and sorted above the other "available" packages by default.
165 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
166 This minor mode replaces `toggle-read-only', which is now obsolete.
169 ** Emacs now generates backtraces on fatal errors.
170 On encountering a fatal error, Emacs now outputs a textual description
171 of the fatal signal, and a short backtrace on platforms like glibc
172 that support backtraces.
175 ** If your Emacs was built from a bzr checkout, the new variable
176 `emacs-bzr-version' contains information about the bzr revision used.
179 ** New variable `create-lockfiles' specifies usage of lockfiles.
180 It defaults to t. Changing it to nil inhibits the creation of lock
181 files (use this with caution).
184 ** Using "unibyte: t" in Lisp source files is obsolete.
185 Use "coding: raw-text" instead.
188 ** Setting `enable-remote-dir-locals' to non-nil allows directory
189 local variables on remote hosts.
192 ** The entry for PCL-CVS has been removed from the Tools menu.
193 The PCL-CVS commands are still available via the keyboard.
195 ** Internationalization changes
197 *** New language environment: Persian.
199 *** New input method `vietnamese-vni'.
201 ** Nextstep (GNUstep / Mac OS X) port changes
203 *** Fullscreen and frame parameter fullscreen is supported.
205 *** A file dialog is used for open/save operations initiated from the
209 * Editing Changes in Emacs 24.3
211 ** Navigation command changes
213 *** New binding `M-g c' for `goto-char'.
215 *** New binding `M-g TAB' for `move-to-column'.
217 *** `M-g TAB' (`move-to-column') prompts for a column number if called
218 interactively with no prefix arg. Previously, it moved to column 1.
220 ** Search and Replace changes
222 *** Non-regexp Isearch now performs "lax" space matching.
223 Each sequence of spaces in the supplied search string may match any
224 sequence of one or more whitespace characters, as specified by the
225 variable `search-whitespace-regexp'. (This variable is also used by a
226 similar existing feature for regexp Isearch).
228 *** New Isearch command `M-s SPC' toggles lax space matching.
229 This applies to both ordinary and regexp Isearch.
231 *** New option `replace-lax-whitespace'.
232 If non-nil, `query-replace' uses flexible whitespace matching too.
235 *** Global `M-s _' starts a symbol (identifier) incremental search,
236 and `M-s _' in Isearch toggles symbol search mode.
237 `M-s c' in Isearch toggles search case-sensitivity.
240 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
241 `ucs-insert' is now an obsolete alias for `insert-char'.
244 ** The `z' key no longer has a binding in most special modes.
245 It used to be bound to `kill-this-buffer', but `z' is too easy to
249 ** New option `delete-trailing-lines' specifies whether
250 M-x delete-trailing-whitespace should delete trailing lines at the end
251 of the buffer. It defaults to t.
255 *** `C-x r +' is now overloaded to invoke `append-to-register.
257 *** New option `register-separator' specifies the register containing
258 the text to put between collected texts for use with M-x
259 append-to-register and M-x prepend-to-register.
262 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
265 ** New command `C-x r M-w' (copy-rectangle-as-kill).
266 It copies the region-rectangle as the last rectangle kill.
269 ** New option `yank-handled-properties' allows processing of text
270 properties on yanked text, in more ways that are more general than
271 just removing them, as done by `yank-excluded-properties'.
274 * Changes in Specialized Modes and Packages in Emacs 24.3
278 *** The faces used by Apropos are now directly customizable.
279 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
280 see the `apropos' Custom group for details.
282 *** The old options whose values specified faces to use were removed
283 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
286 This package has been rewritten to use Tabulated List mode.
288 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
289 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
294 *** You can customize the header text that appears above each calendar month.
295 See the variable `calendar-month-header'.
298 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
301 *** The calendars produced by cal-html include holidays.
302 Customize `cal-html-holidays' to change this.
307 *** CL's main entry is now (require 'cl-lib).
308 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
309 i.e. all its definitions have the "cl-" prefix (and internal definitions use
312 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
313 under the name `cl-foo' instead, with the exceptions of the few definitions
314 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
315 which have not been renamed to `cl-foo*' but just `cl-foo'.
317 The old `cl' is now deprecated and is mainly just a bunch of aliases that
318 provide the old non-prefixed names. Some exceptions are listed below.
321 *** `cl-flet' is not like `flet' (which is deprecated).
322 Instead it obeys the behavior of Common-Lisp's `flet'.
323 In particular, in cl-flet function definitions are lexically scoped,
324 whereas in flet the scoping is dynamic.
327 *** `cl-labels' is slightly different from `labels'.
328 The difference is that it relies on the `lexical-binding' machinery (as opposed
329 to the `lexical-let' machinery used previously) to capture definitions in
330 closures, so such closures will only work if `lexical-binding' is in use.
333 *** `cl-letf' is not exactly like `letf'.
334 The only difference is in details that relate to some deprecated usage
335 of `symbol-function' in place forms.
338 *** `progv' was rewritten to use the `let' machinery.
339 A side effect is that vars without corresponding value are bound to nil
340 rather than making them unbound.
343 *** The following methods of extending `setf' are obsolete
344 (use features from gv.el instead):
345 `define-modify-macro' (use `gv-letplace')
346 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
347 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
348 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
351 ** New compilation option `compilation-always-kill'.
355 *** `custom-reset-button-menu' now defaults to t.
357 *** Non-option variables are never matched in `customize-apropos' and
358 `customize-apropos-options' (i.e. the prefix argument does nothing for
362 ** `desktop-path' no longer includes the "." directory.
363 Desktop files are now located in ~/.emacs.d by default.
368 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
371 *** The D-Bus object manager interface is implemented.
374 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
375 if their value does not fit into Emacs's integer range.
378 *** The function `dbus-call-method' works non-blocking now, it can be
379 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
382 *** Signals can be sent also as unicast message.
385 *** The argument list of `dbus-register-signal' has been extended,
386 according to the new match rule types of D-Bus. See the manual for
390 *** `dbus-init-bus' supports private connections.
393 *** There is a new function `dbus-setenv'.
398 *** Changes are now highlighted using the same color scheme as in
399 modern VCSes. Deletions are displayed in red (new faces
400 `diff-refine-removed' and `smerge-refined-removed', and new definition
401 of `diff-removed'), insertions in green (new faces `diff-refine-added'
402 and `smerge-refined-added', and new definition of `diff-added').
405 *** The variable `diff-use-changed-face' defines whether to use the
406 face `diff-changed', or `diff-removed' and `diff-added' to highlight
407 changes in context diffs.
410 *** The new command `diff-delete-trailing-whitespace' removes trailing
411 whitespace introduced by a diff.
415 *** `dired-do-async-shell-command' executes each file sequentially
416 if the command ends in `;' (when operating on multiple files).
417 Otherwise, it executes the command on each file in parallel.
419 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
420 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
423 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
424 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
425 mark/unmark/flag all files in the active region.
427 *** The minibuffer default for `=' (`dired-diff) has changed.
428 It is now the backup file for the file at point, if one exists.
429 In Transient Mark mode the default is the file at the active mark.
431 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
432 The global binding for `M-=', `count-words-region' is in effect.
435 ** Ediff now uses the same color scheme as Diff mode.
440 *** New module "notifications", which can send a notification when you
441 receive a private message or your nickname is mentioned.
444 *** ERC will look up server/channel names via auth-source and use any
448 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
449 only applies to messages sent by lurkers.
452 ** Flymake uses fringe bitmaps to indicate errors and warnings.
453 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
454 `flymake-warning-bitmap'.
457 ** Follow mode no longer works by using advice.
458 The option `follow-intercept-processes' has been removed.
461 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
462 specifying URL types that should be converted to remote file names at
463 the FFAP prompt. The default is now '("ftp").
466 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
467 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
470 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
473 ** New option `mouse-avoidance-banish-position' specifies where the
474 `banish' mouse avoidance setting moves the mouse.
477 ** notifications.el supports now version 1.2 of the Notifications API.
478 The function `notifications-get-capabilities' returns the supported
482 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
483 closing brackets to be aligned with the line of the opening bracket.
486 ** In Proced mode, new command `proced-renice' renices marked processes.
491 A new version of python.el, which provides several new features, including:
492 per-buffer shells, better indentation, Python 3 support, and improved
493 shell-interaction compatible with iPython (and virtually any other
496 *** Some user options have been replaced/renamed:
497 Old defcustom: | New defcustom:
498 python-indent | python-indent-offset
499 python-guess-indent | python-indent-guess-indent-offset
500 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
501 python-use-skeletons | python-skeleton-autoinsert
503 *** Some user options have been removed:
505 **** `python-indent-string-contents': Strings are never indented.
507 **** `python-honour-comment-indentation':
508 Comments are never considered as indentation markers themselves.
510 **** `python-continuation-offset': Indentation is automatically
511 calculated in a pep8 compliant way depending on the context.
513 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
514 Have no direct mapping as the shell interaction is completely different.
516 **** `python-python-command', `python-jython-command':
517 Replaced by `python-shell-interpreter'.
519 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
520 `python-pdbtrack-minor-mode-string', `python-source-modes':
523 *** Some commands have been replaced:
524 Old command | New command
525 python-insert-class | python-skeleton-class
526 python-insert-def | python-skeleton-def
527 python-insert-for | python-skeleton-for
528 python-insert-if | python-skeleton-if
529 python-insert-try/except | python-skeleton-try
530 python-insert-try/finally | python-skeleton-try
531 python-insert-while | python-skeleton-while
532 python-find-function | python-nav-jump-to-defun
533 python-next-statement | python-nav-forward-sentence
534 python-previous-statement | python-nav-backward-sentence
535 python-beginning-of-defun-function | python-nav-beginning-of-defun
536 python-end-of-defun-function | python-nav-end-of-defun
537 python-send-buffer | python-shell-send-buffer
538 python-send-defun | python-shell-send-defun
539 python-send-region | python-shell-send-region
540 python-send-region-and-go | Emulate with python-shell-send-region and
541 python-shell-switch-to-shell
542 python-send-string | python-shell-send-string
543 python-switch-to-python | python-shell-switch-to-shell
544 python-describe-symbol | python-eldoc-at-point
547 ** reStructuredText mode
549 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
550 fontification, comment handling, and customization have all been revised
553 *** Support for `imenu' and `which-function-mode'.
555 *** The reStructuredText syntax is more closely covered.
556 Sphinx support has been improved.
558 *** `rst-insert-list' inserts new list or continues existing lists.
560 *** A negative prefix argument always works for `rst-adjust'.
562 *** The window configuration is reset after displaying a TOC.
564 *** The constant `rst-version' describes the rst.el package version.
569 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
571 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
573 *** `sh-use-smie' lets you choose a new indentation and navigation code.
576 ** New option `async-shell-command-buffer' specifies the buffer to use
577 for a new asynchronous `shell-command' when the default output buffer
578 `*Async Shell Command*' is already in use.
581 ** SQL mode has a new option `sql-db2-escape-newlines'.
582 If non-nil, newlines sent to the command interpreter will be escaped
583 by a backslash. The default does not escape the newlines and assumes
584 that the sql statement will be terminated by a semicolon.
586 ** Tabulated List and packages derived from it
588 *** New command `tabulated-list-sort', bound to `S', sorts the column
589 at point, or the Nth column if a numeric prefix argument is given.
593 *** The variables `term-default-fg-color' and `term-default-bg-color' are
594 now deprecated in favor of the customizable face `term'.
596 *** You can customize how to display ANSI terminal colors and styles
597 by customizing the corresponding `term-color-<COLOR>',
598 `term-color-underline' and `term-color-bold' faces.
602 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
603 See the manual for details.
605 *** Remote processes are now supported also on remote Windows host.
609 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
610 Previously, this slot stored semicolon-separated attribute-value pairs
611 appended to some imap URLs, but this is not compatible with RFC 3986.
612 So now the `filename' slot stores the entire path and query components
613 and the `attributes' slot is always nil.
615 *** New function `url-encode-url' for encoding a URI string.
616 The `url-retrieve' function now uses this to encode its URL argument,
617 in case that is not properly encoded.
622 *** The free software compiler GHDL is supported (and now the default).
624 *** Support for the VHDL-AMS packages has been added/updated.
626 *** Updated to the 2002 revision of the VHDL standard.
628 *** Accepts \r and \f as whitespace.
631 ** `which-func-modes' now defaults to t, so Which Function mode, when
632 enabled, applies to all applicable major modes.
635 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
639 ** Hooks renamed to avoid obsolete "-hooks" suffix:
640 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
641 *** semantic-change-hooks -> semantic-change-functions
642 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
643 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
644 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
645 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
646 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
647 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
648 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
649 *** rcirc-activity-hooks -> rcirc-activity-functions
650 *** rcirc-print-hooks -> rcirc-print-functions
651 *** dbus-event-error-hooks -> dbus-event-error-functions
652 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
653 *** checkdoc-style-hooks -> checkdoc-style-functions
654 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
655 *** archive-extract-hooks -> archive-extract-hook
656 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
657 *** hfy-post-html-hooks -> hfy-post-html-hook
658 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
659 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
660 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
661 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
663 ** Obsolete packages:
666 In most cases, assoc+member+push+delq work just as well.
667 And in any case it's just a terrible package: ugly semantics, terrible
668 inefficiency, and not namespace-clean.
683 * Incompatible Lisp Changes in Emacs 24.3
686 ** set-buffer-multibyte now signals an error in narrowed buffers.
689 ** (random) by default now returns a different random sequence in
690 every Emacs run. Use (random S), where S is a string, to set the
691 random seed to a value based on S, in order to get a repeatable
692 sequence in later calls.
695 ** The function `x-select-font' can return a font spec, instead of a
696 font name as a string. Whether it returns a font spec or a font name
697 depends on the graphical library.
700 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
701 that substring is inserted literally even if the LITERAL arg is
702 non-nil, instead of causing an error to be signaled.
705 ** Docstrings starting with `*' no longer indicate user options.
706 Only variables defined using `defcustom' are considered user options.
707 The function `user-variable-p' is now an obsolete alias for
711 ** The return values of `defalias', `defun' and `defmacro' have changed,
712 and are now undefined. For backwards compatibility, defun and
713 defmacro currently return the name of the newly defined function/macro
714 but this should not be relied upon.
717 ** `face-spec-set' no longer sets frame-specific attributes when the
718 third argument is a frame (that usage was obsolete since Emacs 22.2).
721 ** The arguments of `dbus-register-signal' are no longer just strings,
722 but keywords or keyword-string pairs. The old argument list will
723 still be supported for Emacs 24.x.
726 ** The CL package's `get-setf-method' function no longer exists.
727 Generalized variables are now part of core Emacs Lisp, and implemented
728 differently to the way cl.el used to do it. It is not possible to
729 define a compatible replacement for `get-setf-method'. See the file
730 gv.el for internal details of the new implementation.
733 Some Lisp symbols have been renamed to avoid problems with spelling
734 that is incorrect or inconsistent with how Emacs normally spells a word.
737 *** Renamed functions
739 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
740 **** inactivate-input-method -> deactivate-input-method
741 **** quail-inactivate -> quail-deactivate
742 **** robin-inactivate -> robin-deactivate
743 **** viper-inactivate-input-method -> viper-deactivate-input-method
744 **** viper-inactivate-input-method-action ->
745 viper-deactivate-input-method-action
746 **** ucs-input-inactivate -> ucs-input-deactivate
750 The old hooks are still supported for backward compatibility, but they
751 are deprecated and will be removed eventually.
752 **** input-method-inactivate-hook -> input-method-deactivate-hook
753 **** robin-inactivate-hook -> robin-deactivate-hook
754 **** quail-inactivate-hook -> quail-deactivate-hook
757 *** Renamed Lisp variables
758 **** follow-deactive-menu -> follow-inactive-menu
759 **** inactivate-current-input-method-function ->
760 deactivate-current-input-method-function
763 ** Some obsolete functions, variables, and faces have been removed:
764 *** `last-input-char', `last-command-char', `unread-command-char'
765 *** `facemenu-unlisted-faces'
766 *** `rmail-decode-mime-charset'
767 *** `iswitchb-read-buffer'
768 *** `sc-version', `sc-submit-bug-report'
769 *** `set-char-table-default'
770 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
771 *** `compile-internal'
773 *** `mode-line-inverse-video'
774 *** `follow-mode-off-hook'
775 *** `cvs-commit-buffer-require-final-newline'
776 (use `log-edit-require-final-newline' instead)
777 *** `cvs-changelog-full-paragraphs'
778 (use `log-edit-changelog-full-paragraphs' instead)
779 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
780 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
781 *** `vc-master-templates' (use `vc-handled-backends' instead)
782 *** `vc-checkout-carefully'
785 * Lisp changes in Emacs 24.3
787 ** New sampling-based Elisp profiler.
788 Try M-x profiler-start, do some work, and then call M-x profiler-report.
789 When finished, use M-x profiler-stop. The sampling rate can be based on
790 CPU time (only supported on some systems) or memory allocations.
793 ** CL-style generalized variables are now in core Elisp.
794 `setf' is autoloaded; `push' and `pop' accept generalized variables.
795 You can define your own generalized variables using `gv-define-simple-setter',
796 `gv-define-setter', etc.
799 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
800 The interpretation of the DECLS is determined by `defun-declarations-alist'.
804 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
805 of `read-regexp' accepts a string ending with a colon and space, and its
806 second argument DEFAULTS can be a list of strings accessible via M-n
807 in the minibuffer ahead of other hard-coded useful regexp-related values.
808 More commands use `read-regexp' now to read their regexp arguments.
812 *** New function `completion-table-with-quoting' to handle completion
813 in the presence of quoting, such as file completion in shell buffers.
815 *** New function `completion-table-subvert' to use an existing completion
816 table, but with a different prefix.
821 *** New error type and new function `user-error'.
822 These do not trigger the debugger.
825 *** New option `debugger-bury-or-kill', saying what to do with the
826 debugger buffer when exiting debug.
829 *** Set `debug-on-message' to enter the debugger when a certain
830 message is displayed in the echo area. This can be useful when trying
831 to work out which code is doing something.
833 *** New var `inhibit-debugger', automatically set to prevent accidental
834 recursive invocations.
838 *** The functions get-lru-window, get-mru-window and get-largest-window
839 now accept a third argument to avoid choosing the selected window.
841 *** Additional values recognized for option `window-combination-limit'.
843 *** New macro `with-temp-buffer-window'.
845 *** `temp-buffer-resize-mode' no longer resizes windows that have been
848 *** New function `fit-frame-to-buffer' and new options
849 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
851 *** New option switch-to-buffer-preserve-window-point to restore a
852 window's point when switching buffers.
854 *** New display action functions `display-buffer-below-selected',
855 and `display-buffer-in-previous-window'.
857 *** New display action alist entry `inhibit-switch-frame', if non-nil,
858 tells display action functions to avoid changing which frame is
861 *** New display action alist entry `pop-up-frame-parameters', if
862 non-nil, specifies frame parameters to give any newly-created frame.
864 *** New display action alist entry `previous-window', if non-nil,
865 specifies window to reuse in `display-buffer-in-previous-window'.
867 *** New display action alist entries `window-height' and `window-width'
868 to specify size of new window created by `display-buffer'.
870 *** The following variables are obsolete, as they can be replaced by
871 appropriate entries in the `display-buffer-alist' function introduced
874 **** `display-buffer-reuse-frames'
876 **** `special-display-regexps'
878 **** `special-display-frame-alist'
880 **** `special-display-buffer-names'
882 **** `special-display-function'
884 **** `display-buffer-function'
886 **** `dired-shrink-to-fit'
890 *** `current-time-string' no longer requires that its argument's year
891 must be in the range 1000..9999. It now works with any year supported
892 by the underlying C implementation.
894 *** `current-time' now returns extended-format time stamps
895 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
896 PSEC is typically a multiple of 1000 on current machines. Other
897 functions that use this format, such as file-attributes and
898 format-time-string, have been changed accordingly. Old-format time
899 stamps are still accepted.
901 *** The format of timers in timer-list and timer-idle-list is now
902 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
903 The PSECS slot is new, and uses picosecond resolution. It can be
904 accessed via the new timer--psecs accessor.
906 *** Last-modified time stamps in undo lists now are of the form
907 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
910 ** Floating point functions now always return special values like NaN,
911 instead of signaling errors, if given invalid args, e.g. (log -1.0).
912 Previously, they returned NaNs on some platforms but signaled errors
913 on others. The affected functions are acos, asin, tan, exp, expt,
914 log, log10, sqrt, and mod.
916 ** Interpreted files are eagerly macro-expanded during load.
917 This can significantly speed up execution of non-byte-compiled code,
918 but can also bump into harmless and previously unnoticed cyclic
919 dependencies. These should not be fatal: they will simply cause the
920 macro-calls to be left for later expansion (as before), but will also
921 result in a warning ("Eager macro-expansion skipped due to cycle")
922 describing the cycle.
924 ** Miscellaneous new functions:
926 *** `autoloadp' tests if its argument is an autoloaded object.
928 *** `autoload-do-load' performs the autoloading operation.
930 *** `buffer-narrowed-p' tests if the buffer is narrowed.
932 *** `file-name-base' returns a file name sans directory and extension.
934 *** `function-get' fetches a function property, following aliases.
936 *** `posnp' tests if an object is a `posn'.
938 *** `set-temporary-overlay-map' sets up a temporary keymap that
939 takes precedence over most other maps for a short while (normally one key).
941 *** `system-users' returns the user names on the system.
943 *** `system-groups' returns the group names on the system.
945 *** `tty-top-frame' returns the topmost frame of a text terminal.
948 ** New macros `setq-local' and `defvar-local'.
951 ** New fringe bitmap `exclamation-mark'.
954 ** Face underlining can now use a wave.
956 ** The following functions and variables are obsolete:
958 *** `automount-dir-prefix' (use `directory-abbrev-alist')
960 *** `buffer-has-markers-at'
962 *** `macro-declaration-function' (use `macro-declarations-alist')
964 *** `window-system-version' (provides no useful information)
966 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
968 *** `query-replace-interactive'
970 *** `font-list-limit' (has had no effect since Emacs < 23)
973 * Changes in Emacs 24.3 on non-free operating systems
976 ** Cygwin builds can use the native MS Windows user interface.
977 Pass --with-w32 to configure. The default remains the X11 interface.
979 ** Two new functions are available in Cygwin builds:
980 `cygwin-convert-path-from-windows' and `cygwin-convert-path-to-windows'.
981 These functions allow Lisp code to access the Cygwin file-name mapping
982 machinery to convert between Cygwin and Windows-native file names.
984 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
985 Emacs now supports mouse highlight, help-echo (in the echo area), and
986 `mouse-autoselect-window'.
989 ** On MS Windows Vista and later Emacs now supports symbolic links.
992 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
993 support for libxml2, even if its presence is detected.
996 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
999 ** On Mac OS X, configure no longer automatically adds the Fink /sw
1000 directories to the search path. You must add them yourself if you want them.
1003 * Changes in Emacs 24.2
1005 ** This is mainly a bug-fix release.
1008 * Installation Changes in Emacs 24.1
1010 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1011 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1012 also depend on Gtk+. You can disable them with --without-rsvg and
1015 ** Emacs can be compiled with GnuTLS support.
1016 This happens by default if a suitably recent version of the library is
1017 found at build time. To prevent this, use the configure option
1018 `--without-gnutls'. See below for GnuTLS features.
1020 ** Emacs can be compiled with SELinux support.
1021 This happens by default if a suitably recent version of the library is
1022 found at build time. To prevent this, use the configure option
1023 `--without-selinux'. See below for SELinux features.
1025 ** Emacs can be compiled with ImageMagick support.
1026 This happens by default if a suitably recent version of the library is
1027 found at build time. To prevent this, use the configure option
1028 `--without-imagemagick'. See below for ImageMagick features.
1029 This feature is not available for the Nextstep or MS ports.
1031 ** Emacs can be compiled with libxml2 support.
1032 This happens by default if a suitably recent version of the library is
1033 found at build time. To prevent this, use the configure option
1034 `--without-xml2'. See below for libxml2 features.
1036 ** By default, the installed Info and man pages are compressed.
1037 You can disable this by configuring --without-compress-info.
1039 ** New configure option --with-wide-int.
1040 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1041 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1044 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1045 These provide no new functionality, they just remove the need to edit
1046 lib-src/Makefile by hand in order to use the associated features.
1048 ** New configure option --enable-use-lisp-union-type.
1049 This is only useful for Emacs developers to debug certain types of bugs.
1050 This is not a new feature; only the configure flag is new.
1052 ** The standalone programs digest-doc and sorted-doc are removed.
1053 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1055 ** The standalone program `fakemail' is removed.
1056 If you need it, feedmail.el provides a superset of the functionality.
1059 * Startup Changes in Emacs 24.1
1061 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1062 command line arguments, and the EMACS_UNIBYTE environment variable, no
1063 longer have any effect. (They were declared obsolete in Emacs 23.)
1065 ** New command line option `--no-site-lisp' removes site-lisp directories
1066 from load-path. -Q now implies this. This option does not affect the
1067 EMACSLOADPATH environment variable (and hence has no effect for
1071 * Changes in Emacs 24.1
1075 *** Many packages now use the `completion-at-point' command,
1076 rather than implementing separate completion commands.
1078 *** `completion-at-point' now handles tags and semantic completion.
1080 *** Completion in a non-minibuffer now tries to detect the end of completion
1081 and pops down the *Completions* buffer accordingly.
1083 *** New option `completion-cycle-threshold' allows completion cycling.
1085 *** New option `completion-category-overrides' for overriding the
1086 default completion style in certain circumstances.
1088 *** New completion style `substring'.
1090 *** Completion of buffer names uses `substring' completion by default.
1092 *** The option `widget-complete-field' has been removed.
1096 *** The first time you try sending mail, Emacs asks for a mail method.
1097 This is implemented by a new default for `send-mail-function', which
1098 is `sendmail-query-once'. This offers to use the smtpmail package, or
1099 to use the old defaults relying on external mail facilities
1100 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1101 `mailclient-send-it' on Windows).
1103 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1104 the report to your desktop's preferred mail client, if there is one.
1105 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1107 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1108 and Mail mode changes
1110 ** Emacs server and client changes
1112 *** New option `server-port' specifies the port for TCP Emacs servers.
1114 *** New emacsclient argument -q/--quiet suppresses some status messages.
1116 *** New emacsclient argument --frame-parameters specifies the frame
1117 parameters of any newly-created graphical frame.
1119 *** If emacsclient shuts down due to Emacs signaling an error,
1120 its exit status is 1.
1122 *** New emacsclient argument --parent-id ID.
1123 This opens a client frame in parent X window ID, via XEmbed, similar
1124 to the --parent-id argument to Emacs.
1126 ** Internationalization changes
1128 *** Emacs now supports display and editing of bidirectional text.
1129 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1130 displayed in the correct visual order as expected by users of those
1131 scripts. The display reordering is a "full bidirectionality" class
1132 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1133 with no RTL text should look exactly the same as before.
1135 **** New buffer-local variable `bidi-display-reordering'.
1136 To disable display reordering in a buffer, change this to nil.
1138 **** New buffer-local variable `bidi-paragraph-direction'.
1139 If nil (the default), Emacs determines the base direction of each
1140 paragraph from its text, as specified by the UBA. Setting the value
1141 to `right-to-left' or `left-to-right' forces a base direction on each
1144 Paragraphs with right-to-left base direction are displayed starting at
1145 the right window edge.
1147 *** Enhanced support for characters with no glyphs in available fonts,
1148 or, on text terminals, characters that cannot be encoded by the
1149 terminal coding system. The new option `glyphless-char-display-control'
1150 specifies how to display them: as a hexadecimal code in a box, a thin
1151 1-pixel space, an empty box, etc.
1153 *** New input methods for Farsi and Bulgarian
1154 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1156 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1157 (U+2010 and U+2011).
1159 *** New Hebrew translation of the Emacs Tutorial.
1160 Type `C-u C-h t' to choose it in case your language setup doesn't
1161 automatically select it.
1163 ** An Emacs Lisp package manager is now included.
1164 This is a convenient way to download and install additional packages,
1165 from a package repository at http://elpa.gnu.org.
1167 *** M-x list-packages shows a list of packages, which can be
1168 selected for installation.
1170 *** New command `describe-package', bound to `C-h P'.
1172 *** By default, all installed packages are loaded automatically when
1173 Emacs starts up. To disable this, set `package-enable-at-startup' to
1174 nil. To specify the packages to load, customize `package-load-list'.
1176 ** Custom theme changes
1178 *** New command `M-x customize-themes', which provides a convenient
1179 interface for enabling and disabling Custom themes.
1181 *** New option `custom-theme-load-path' is the load path for themes.
1182 Emacs no longer looks for Custom themes in `load-path'. The default
1183 value of `custom-theme-load-path' says to look for themes in
1184 `custom-theme-directory', followed by a subdirectory of
1185 `data-directory' named "themes/", which contains a small selection of
1186 built-in Custom themes.
1188 *** New option `custom-safe-themes' records known-safe theme files.
1189 If a theme is not in this list, Emacs queries before loading it, and
1190 offers to save the theme to `custom-safe-themes' automatically. By
1191 default, all themes included in Emacs are treated as safe.
1193 ** Improved GTK integration
1195 *** GTK scroll-bars are now placed on the right by default.
1196 The function `set-scroll-bar-mode' can change this.
1198 *** GTK tool bars can have just text, just images or images and text.
1199 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1200 the default is taken from desktop settings.
1202 *** GTK tool bars can be placed on any edge of the frame.
1203 The frame-parameter tool-bar-position controls this. It takes the
1204 values top, left, right or bottom. The Options => Show/Hide menu has
1207 *** The default colors for selected text (the `region' face) are taken
1208 from the GTK theme when Emacs is built with GTK.
1210 *** Emacs uses GTK tooltips by default if built with GTK.
1211 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1213 ** Graphical interface changes
1215 *** On graphical displays, the mode-line no longer ends in dashes.
1216 Also, the first dash (which does not indicate anything) is just
1217 displayed as a space.
1219 *** `menu-bar-select-buffer-function' lets you choose another operation
1220 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1222 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1223 built with Xft. These fonts can be set via X resources, for example:
1224 Emacs.pane.menubar.font: Courier-12
1228 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1229 or if it receives a SIGINT signal in batch mode.
1231 *** `kill-emacs-hook' is now also run in batch mode.
1232 Third-party code which adds to `kill-emacs-hook' should check if they
1233 do the right thing in batch mode.
1235 ** Scrolling changes
1237 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1238 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1239 of buffer at first key-press (instead they move to top/bottom of buffer)
1240 when `scroll-error-top-bottom' is non-nil.
1242 *** New option `scroll-error-top-bottom' (see above).
1244 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1245 scroll a line instead of full screen.
1247 *** New property `scroll-command' should be set on a command's symbol to
1248 define it as a scroll command affected by `scroll-preserve-screen-position'.
1250 *** If you customize `scroll-conservatively' to a value greater than 100,
1251 Emacs will never recenter point in the window when it scrolls due to
1252 cursor motion commands or commands that move point (e.f., `M-g M-g').
1253 Previously, you needed to use `most-positive-fixnum' as the value of
1254 `scroll-conservatively' to achieve the same effect.
1256 *** "Aggressive" scrolling now honors the scroll margins.
1257 If you customize `scroll-up-aggressively' or
1258 `scroll-down-aggressively' and move point off the window, Emacs now
1259 scrolls the window so as to avoid positioning point inside the scroll
1262 ** Basic SELinux support has been added.
1263 This requires Emacs to be linked with libselinux at build time.
1265 *** Emacs preserves the SELinux file context when backing up.
1266 Also, the function `copy-file' has an extra optional argument for
1267 preserving SELinux context, and the return value of `backup-buffer'
1268 now includes the SELinux context.
1270 *** New functions `file-selinux-context' and `set-file-selinux-context'
1271 get and set the SELinux context of a file.
1275 *** `delete-by-moving-to-trash' now only affects commands that specify
1276 trashing. This avoids inadvertently trashing temporary files.
1278 *** Calling `delete-file' or `delete-directory' with a prefix argument
1279 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1281 ** File- and directory-local variable changes
1283 *** You can stop directory local vars from applying to subdirectories.
1284 Add an element (subdirs . nil) to the alist portion of any variables
1285 settings to indicate that the section should not apply to
1288 *** Directory local variables can apply to some file-less buffers.
1289 Affected modes include dired, vc-dir, and log-edit. For example,
1290 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1291 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1292 `hack-dir-local-variables-non-file-buffer' to support this.
1294 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1295 Instead, use "eval: (minor-mode 1)".
1297 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1298 to `inhibit-local-variables-regexps'. As the name suggests, it now
1299 applies to ALL file local variables, not just -*- lines. The
1300 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1305 *** The `quit-window' command now restores the last buffer displayed
1306 in the quitted window.
1308 *** Resizing an Emacs frame now preserves proportional window sizes,
1309 modulo restrictions like window minimum sizes and fixed-size windows.
1311 *** The behavior of `display-buffer' is now customizable in detail.
1313 **** New option `display-buffer-base-action' specifies a list of
1314 user-determined display "actions" (functions and optional arguments
1315 for choosing the displaying window).
1317 This takes precedence over the default display action, which is
1318 specified by `display-buffer-fallback-action'.
1320 **** New option `display-buffer-alist' maps buffer name regexps to
1321 display actions, taking precedence over `display-buffer-base-action'.
1323 *** New option `window-combination-limit'.
1324 The new option `window-combination-limit' allows to return the space
1325 obtained for resizing or creating a window more reliably to the window
1326 from which such space was obtained.
1328 *** New option `window-combination-resize'.
1329 The new option `window-combination-resize' allows to split a window that
1330 otherwise cannot be split because it's too small by stealing space from
1331 other windows in the same combination. Subsequent resizing or deletion
1332 of the window will resize all windows in the same combination as well.
1334 *** New option `frame-auto-hide-function' lets you choose between
1335 iconifying or deleting a frame when burying a buffer in a dedicated
1336 frame, or quitting a window showing a buffer in a frame of its own.
1338 *** New commands `maximize-window' and `minimize-window'.
1339 These maximize and minimize the size of a window within its frame.
1341 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1342 These functions allow to navigate through the live buffers that have
1343 been shown in a specific window.
1345 ** Minibuffer changes
1347 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1348 This is handy for minibuffer-only frames, and is also used for the feature
1349 where mouse-1 pops up *Messages*"', which can now easily be changed.
1351 *** Minibuffers set `truncate-lines' to nil.
1352 If you want to change the value to something else, you could use
1353 for example `minibuffer-setup-hook'.
1355 ** `auto-mode-case-fold' is now enabled by default.
1357 ** `backup-by-copying-when-mismatch' now defaults to t.
1359 ** New basic faces `error', `warning', `success'.
1360 These are used to highlight text indicating failure, caution or
1361 successful operation.
1363 ** New option `list-colors-sort' defines the color sort order
1364 for `list-colors-display'.
1366 ** The variable `focus-follows-mouse' now always defaults to nil.
1369 * Editing Changes in Emacs 24.1
1373 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1374 `isearch-yank-line'.
1376 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1377 `isearch-yank-kill'.
1379 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1381 ** New commands `count-words-region' and `count-words'.
1383 *** M-= is bound to `count-words-region', not `count-lines-region'.
1384 The `count-words-region' command, when called interactively, reports
1385 the number of lines, words, and characters in the region. It is a
1386 superset of the old `count-lines-region', which is now an obsolete
1389 ** The command `just-one-space' (M-SPC), if given a negative argument,
1390 also deletes newlines around point.
1394 *** New option `delete-active-region'.
1395 If non-nil, [delete] and DEL delete the region if it is active and no
1396 prefix argument is given. If set to `kill', those commands kill
1399 *** New command `delete-forward-char', bound to [delete].
1400 This is meant for interactive use, and obeys `delete-active-region'.
1401 The command `delete-char' does not obey `delete-active-region'.
1403 *** `delete-backward-char' is now a Lisp function.
1404 Apart from obeying `delete-active-region', its behavior is unchanged.
1405 However, the byte compiler now warns if it is called from Lisp; Lisp
1406 callers should use delete-char with a negative argument instead.
1408 *** The option `mouse-region-delete-keys' has been deleted.
1410 ** Selection changes.
1412 The default handling of clipboard and primary selections has been
1413 changed to conform with modern X applications. In short, most
1414 commands for killing and yanking text now use the clipboard, while
1415 mouse commands use the primary selection.
1417 In the following, we provide a list of these changes, followed by a
1418 list of steps to get the old behavior back if you prefer that.
1420 *** `select-active-regions' now defaults to t.
1421 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1422 the kill ring. The selected text is put in the primary selection, if
1423 the system possesses a separate primary selection facility (e.g. X).
1425 **** `select-active-regions' also accepts a new value, `only'.
1426 This means to only set the primary selection for temporarily active
1427 regions (usually made by mouse-dragging or shift-selection);
1428 "ordinary" active regions, such as those made with C-SPC followed by
1429 point motion, do not alter the primary selection.
1431 **** `mouse-drag-copy-region' now defaults to nil.
1433 *** mouse-2 is now bound to `mouse-yank-primary'.
1434 This pastes from the primary selection, ignoring the kill-ring.
1435 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1437 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1439 *** `x-select-enable-primary' now defaults to nil.
1440 Thus, commands that kill text or copy it to the kill-ring (such as
1441 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1443 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1444 exactly equivalent to M-w, C-w, and C-y respectively.
1446 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1447 non-nil by default, as Windows does not support the primary selection
1448 between applications.
1450 *** To return to the previous behavior, do the following:
1452 **** Change `select-active-regions' to nil.
1453 **** Change `mouse-drag-copy-region' to t.
1454 **** Change `x-select-enable-primary' to t (on X only).
1455 **** Change `x-select-enable-clipboard' to nil.
1456 **** Bind `mouse-yank-at-click' to mouse-2.
1458 *** Support for X cut buffers has been removed.
1460 *** X clipboard managers are now supported.
1461 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1463 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1464 in the current rectangle. With a prefix argument, this prompts for a
1465 number to count from and for a format string.
1467 ** `redisplay-dont-pause' now defaults to t.
1468 This makes Emacs feel more responsive to editing commands that arrive
1469 at high rate, e.g. if you lean on some key, because stopping redisplay
1470 in the middle (when this variable is nil) forces more expensive
1471 updates later on, and Emacs appears to be unable to keep up.
1473 ** The behavior of <TAB> for active regions in Text mode has changed.
1474 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1475 when the region is active causes Emacs to indent all the lines in the
1476 region, aligning them with the line previous to the first line in the
1477 region (or with the left margin if there is no previous line).
1479 ** When `occur' is called with a prefix argument, matching strings are
1480 collected into the `*Occur*' buffer without line numbers. If there
1481 are parenthesized subexpressions in the specified regexp, `occur'
1482 reads replacement text that may contain \\& and \\N whose convention
1483 follows `replace-match'.
1486 * Changes in Specialized Modes and Packages in Emacs 24.1
1488 ** Archive Mode has basic support for browsing and updating 7z archives.
1492 *** BibTeX mode now supports biblatex.
1493 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1494 `bibtex-entry-field-alist' is now an obsolete alias for
1495 `bibtex-BibTeX-entry-alist'.
1497 *** New command `bibtex-search-entries', bound to C-c C-a.
1499 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1501 *** New variable `bibtex-search-entry-globally'.
1505 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1507 *** The default browser used by the package is now the "xdg-open" program,
1508 on platforms that support it. This calls your desktop's preferred browser.
1510 ** Calendar, Diary, and Appt
1512 *** Diary entries can contain non-printing "comments".
1513 See the variable `diary-comment-start'.
1515 *** Appointments can specify their individual warning times.
1516 See the variable `appt-warning-time-regexp'.
1518 *** The function specified by `appt-disp-window-function' may be passed
1519 lists of arguments if multiple appointments are due at similar times.
1520 If you are using a custom function for this, you should update it.
1522 *** New function `diary-hebrew-birthday'.
1524 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1525 may no longer be nil, but must all be strings.
1527 *** The obsolete (since Emacs 22.1) method of enabling the appt
1528 package by adding `appt-make-list' to `diary-hook' has been removed.
1529 Use `appt-activate' instead.
1531 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1532 appt-issue-message (use the function appt-activate)
1533 appt-visible/appt-msg-window (use the variable appt-display-format)
1535 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1536 view-diary-entries, list-diary-entries, show-all-diary-entries
1540 *** New feature to "guess" the style in an existing buffer.
1541 The main entry point is M-x c-guess.
1543 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1545 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1546 Thus C-M-a will, by default, go to the beginning of the immediate function,
1549 *** "Macros with semicolons" can be registered for correct indentation.
1550 Where such a macro ends a line (no semicolon) the next statement is no longer
1551 parsed as a statement continuation.
1553 ** Comint and modes derived from it use the standard completion code.
1557 *** Compilation mode can be used without Font Lock mode.
1558 `compilation-parse-errors-function' is now obsolete.
1560 *** New variable `compilation-filter-start', which is bound while
1561 `compilation-filter-hook' runs. It records the start position of the
1562 text inserted by `compilation-filter'.
1564 *** `compilation-error-screen-columns' and `compilation-first-column'
1565 are obeyed in the editing buffer. So programming language modes can
1566 set them, whereas previously only the value in the *Compilation*
1571 *** Customize buffers now contain a search field.
1572 The search is performed using `customize-apropos'.
1573 To turn off the search field, set `custom-search-field' to nil.
1575 *** Options in customize group buffers start out hidden if not customized.
1576 Use the arrow to the left of the option name to toggle visibility.
1578 *** custom-buffer-sort-alphabetically now defaults to t.
1580 *** The color widget now has a "Choose" button, which allows you to
1581 choose a color via `list-colors-display'.
1585 *** It is now possible to access buses other than the default system
1588 *** The `dbus-register-method' and `dbus-register-property' functions
1589 optionally do not register names.
1591 *** The new function `dbus-register-service' registers a known service
1592 name on a D-Bus without also registering a property or a method.
1596 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1597 if called with a prefix argument, read a file name from the minibuffer
1598 instead of using the current buffer.
1600 *** The "dired local variables" feature of Dired-x is obsolete.
1601 The standard directory local variables feature replaces it.
1605 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1606 controlling attempts to autojoin a channel.
1608 *** New variable `erc-coding-system-precedence': If we use `undecided'
1609 as the server coding system, this variable will then be consulted.
1610 The default is to decode strings that can be decoded as utf-8 as
1611 utf-8, and do the normal `undecided' decoding for the rest.
1615 *** The default value of `eshell-directory-name' has changed
1616 to be an "eshell" directory in `user-emacs-directory'.
1617 The old "~/.eshell/" directory is still used if it exists, though.
1621 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1622 It now supports multithread non-stop debugging and simultaneous
1623 debugging of several threads.
1627 *** RET (`image-toggle-animation') toggles animation, if applicable.
1628 Animation plays once, unless the option `image-animate-loop' is non-nil.
1632 *** New command M-x info-display-manual displays a named Info manual.
1633 If that manual is already visited in some Info buffer, it displays
1634 that buffer. (This is handy if you have many manuals in many *info*
1635 buffers, and don't remember the name of the buffer visiting the manual
1636 you want to consult.) Otherwise, it loads and displays the manual.
1638 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1639 This is for compatibility with the stand-alone Info reader program,
1640 and also because `Info-edit' is a rarely used command that is disabled
1643 ** Mail mode changes (not Message mode)
1645 *** New command M-x mail-add-attachment for adding MIME attachments
1647 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1648 (Its name is misleading, since it has nothing to do with MIME
1649 attachments.) The old name is now an obsolete alias to the new name.
1651 ** MH-E has been updated to MH-E version 8.3.1.
1652 See MH-E-NEWS for details.
1654 ** Modula-2 mode provides auto-indentation.
1656 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1658 ** nXML mode no longer binds C-RET to `nxml-complete'.
1659 Completion is now performed via `completion-at-point', bound to C-M-i
1660 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1661 default), this performs tag completion.
1663 ** Org mode has been updated to version 7.8.09.
1664 See ORG-NEWS for details.
1666 ** Prolog mode has been completely revamped, with lots of additional
1667 functionality such as more intelligent indentation, electricity,
1668 support for more variants, including Mercury, and a lot more.
1672 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1673 in the Rmail incoming message.
1675 *** The variable `rmail-message-filter' no longer has any effect.
1676 This change was made in Emacs 23.1 but was not advertised at the time.
1677 Try using `rmail-show-message-hook' instead.
1681 *** M-x shell prompts for the shell path name if the default directory
1682 is a remote file name and neither the environment variable $ESHELL nor
1683 the variable `explicit-shell-file-name' is set.
1685 *** TAB is now bound to the standard `completion-at-point' command,
1686 which now implements the pcomplete rules for shell command completion.
1690 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1691 if the mail server supports them. This uses either built-in GnuTLS
1692 support, or the starttls.el library. Customize `smtpmail-stream-type'
1695 *** The variable `smtpmail-auth-credentials' has been removed.
1696 By default, the information is now stored in the file ~/.authinfo.
1697 This was the default value of smtpmail-auth-credentials. If you had
1698 customized smtpmail-auth-credentials to a list of user names and
1699 passwords, those settings are not used. During your first connection
1700 to the smtp server, Emacs will prompt for the user name and password,
1701 and offer to save them to ~/.authinfo. Or you can manually copy the
1702 credentials to ~/.authinfo. For example, if you had
1704 (setq smtpmail-auth-credentials
1705 '(("mail.example.org" 25 "jim" "s!cret")))
1707 then the equivalent line in ~/.authinfo would be
1709 machine mail.example.org port 25 login jim password s!cret
1711 See the auth-source manual for more information, e.g. on encrypting
1712 the credentials file.
1714 *** The variable `smtpmail-starttls-credentials' has been removed.
1715 If you had that set, you need to put
1717 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1719 in your ~/.authinfo file instead.
1721 *** SMTPmail defaults to using the address in the From: header as the
1722 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1723 to the address you wish to use instead.
1727 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1728 and `sql-oracle-scan-on'.
1730 *** New options controlling prompting for login parameters.
1731 Each supported product has a custom variable `sql-*-login-params',
1732 which is a list of the parameters to be prompted for before a
1733 connection is established.
1735 *** The command `sql-product-interactive' now takes a prefix argument,
1736 which causes it to prompt for an SQL product.
1738 *** Product-specific SQL interactive commands now take prefix arguments.
1739 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1740 given a prefix argument, prompt for a name for the SQL interactive
1741 buffer. This reduces the need for calling `sql-rename-buffer'.
1743 *** SQL interactive modes suppress command continuation prompts, and
1744 replace tabs with spaces. The first change impacts multiple line SQL
1745 statements entered with C-j between each line, statements yanked into
1746 the buffer and statements sent with `sql-send-*' functions. The
1747 second prevents the MySQL and Postgres interpreters from listing
1748 object name completions when sent text via `sql-send-*' functions.
1750 *** New command `sql-connect' starts a predefined SQLi session,
1751 using the login parameters from `sql-connection-alist'.
1753 *** New "Save Connection" menu item in SQLi buffers.
1754 This gathers the login params specified for the SQLi session, if it
1755 was not started by a connection, and saves them as a new connection.
1757 *** New commands for listing database objects and details:
1758 sql-list-all and sql-list-table.
1760 *** An API for manipulating SQL product definitions has been added.
1764 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1768 *** New inline access method "ksu" (kerberized su).
1770 *** The following access methods are discontinued: "ssh1_old",
1771 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1773 *** The user option `remote-file-name-inhibit-cache' controls whether
1774 remote file attributes are cached for better performance.
1776 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1777 default value to "".
1779 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1780 for remote machines which support SELinux.
1782 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1783 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1784 the degree of parallelism.
1786 ** VC and related modes
1788 *** Support for pulling on distributed version control systems.
1789 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1790 supported (currently with Bzr, Git, and Mercurial), to update the
1791 current branch and working tree. A prefix argument means to prompt
1792 the user for specifics, e.g. a pull location.
1794 *** `vc-update' is now an alias for `vc-pull'.
1796 *** Support for merging on distributed version control systems.
1797 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1798 is supported (currently with Bzr, Git, and Mercurial), to merge
1799 changes from another branch into the current one. It prompts for
1800 specifics, e.g. a merge source.
1802 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1803 shows a diff while querying the user. It defaults to t.
1805 *** Log entries in some Log View buffers can be toggled to display a
1806 longer description by typing RET (log-view-toggle-entry-display).
1807 This is currently supported for Bzr, Git, and Mercurial (to support
1808 another backend, define a `log-view-expanded-log-entry-function').
1809 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1810 use this to display the full log entry for the revision at point.
1812 *** New command `vc-ediff' allows visual comparison of two revisions
1813 of a file similar to `vc-diff', but using ediff backend.
1815 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1816 this was not advertised at the time.
1818 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1819 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1820 this was not advertised at the time.
1826 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1828 *** partial-completion-mode (complete.el) is obsolete.
1829 You can get a comparable behavior with:
1830 (setq completion-styles '(partial-completion initials))
1831 (setq completion-pcm-complete-word-inserts-delimiters t)
1833 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1835 *** pgg is obsolete (use EasyPG instead).
1837 *** sregex.el is obsolete, since rx.el is a strict superset.
1839 *** s-region.el and pc-select.el are obsolete.
1840 They are superseded by shift-select-mode, enabled by default since 23.1.
1842 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1846 *** The Landmark game is now invoked with `landmark', not `lm'.
1847 Its functions and variables have been similarly renamed.
1849 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1850 (This interfered with cua-mode.)
1852 *** f90.el has some support for Fortran 2008 syntax.
1854 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1856 *** New command `nato-region' converts text to NATO phonetic alphabet.
1859 * New Modes and Packages in Emacs 24.1
1861 ** Occur Edit mode applies edits made in *Occur* buffers to the
1862 original buffers. It is bound to "e" in Occur mode.
1864 ** New global minor mode electric-pair-mode.
1865 When enabled, typing an open parenthesis automatically inserts the
1866 matching closing one.
1868 ** New global minor mode electric-indent-mode.
1869 When enabled, typing certain characters triggers reindentation.
1870 Major modes wishing to use this can set electric-indent-chars or
1871 electric-indent-functions.
1873 ** New global minor mode electric-layout-mode.
1874 When enabled, typing certain characters automatically inserts newlines.
1875 Major modes wishing to use this can set electric-layout-rules.
1877 ** tabulated-list.el provides a generic major mode for tabulated data,
1878 from which other modes can be derived.
1880 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1882 ** secrets.el is an implementation of the Secret Service API, an
1883 interface to password managers like GNOME Keyring or KDE Wallet. The
1884 Secret Service API requires D-Bus for communication. The command
1885 `secrets-show-secrets' offers a buffer with a visualization of the
1888 ** notifications.el provides an implementation of the Desktop
1889 Notifications API. It requires D-Bus for communication.
1891 ** soap-client.el supports access to SOAP web services from Emacs.
1892 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1894 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1896 ** New emacs-lock.el package.
1897 The previous version has been moved to obsolete/old-emacs-lock.el.
1898 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1899 against exiting Emacs and killing the buffer can be set separately.
1900 The mechanism for automatically turning off protection for buffers
1901 with dead inferior processes has been generalized.
1904 * Incompatible Lisp Changes in Emacs 24.1
1906 ** Passing a nil argument to a minor mode function call now ENABLES
1907 the minor mode unconditionally. This is so that you can write e.g.
1909 (add-hook 'text-mode-hook 'foo-mode)
1911 to enable foo-mode in Text mode buffers, removing the need for
1912 `turn-on-foo-mode' style functions. This affects all mode commands
1913 defined by `define-minor-mode'. If called interactively, the mode
1914 command still toggles the minor mode.
1916 ** The return value of `backup-buffer' has changed.
1917 It is now a list of three elements, where the second element is a list
1918 describing the original file's SELinux context. If Emacs or the
1919 system lacks SELinux support, the context list is (nil nil nil nil).
1920 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1922 ** `char-direction-table' and the `char-direction' function were deleted.
1923 They were buggy and inferior to the new support of bidirectional
1924 editing introduced in Emacs 24. If you need the bidirectional
1925 properties of a character, use `get-char-code-property' with the last
1926 argument `bidi-class'.
1928 ** `copy-directory' now copies the source directory as a subdirectory
1929 of the target directory, if the latter is an existing directory. The
1930 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1931 the contents directly into a pre-existing target directory.
1933 ** For mouse click input events in the text area, the Y pixel
1934 coordinate in the POSITION list now counts from the top of the text
1935 area, excluding any header line. Previously, it counted from the top
1938 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1939 been further reduced. Now a backquote not followed by a space is
1940 always treated as a "new-style" backquote. Please remove all
1941 "old-style" backquotes from your code. If your code uses backquotes
1942 as documented in the Elisp manual, and compiles without warning, then
1943 you have nothing to do in this regard. Code not following the
1944 appropriate conventions may fail to compile.
1946 The most common cause of trouble seems to be an old-style backquote
1947 followed by a newline. Another cause of trouble is vector notation
1948 for key sequence notation: instead of [(control ,)] and [(control ')],
1949 you should write [(control ?,)] and [(control ?')], which will work in
1952 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1953 was not advertised at the time. The function `custom-initialize-delay'
1954 replaced all known uses.
1956 ** `view-buffer' now treats special mode-class in the same way that
1957 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1958 major mode is special).
1960 ** Menu and tool bar changes
1962 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1963 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1964 With these alist entries omitted, `make-frame' checks the value of the
1965 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1966 a menu-bar or tool-bar, respectively. If the alist entries are added,
1967 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1969 *** The menu bar bindings's caches are not used any more.
1970 Use (where-is-internal <def> nil t) instead.
1972 ** Regions created by mouse dragging are now normal active regions,
1973 similar to those created by shift-selection (see Selection changes
1974 above). In previous Emacs versions, these regions were delineated by
1975 `mouse-drag-overlay'; that variable has been removed.
1977 ** The fourth argument of `filter-buffer-substring' has been removed.
1978 If you want to remove text properties from the final result, simply
1979 pass the result through substring-no-properties.
1981 ** cl.el no longer provides `cl-19'.
1983 ** The following obsolete functions and aliases have been removed
1984 (the appropriate new function is given in parentheses; "not needed"
1985 means you can just remove all calls to the function in question):
1987 *** `comint-kill-output' (`comint-delete-output')
1988 *** `decompose-composite-char' (`char-to-string')
1989 *** `outline-visible' (`outline-invisible-p')
1990 *** `internal-find-face' (`facep')
1991 *** `internal-get-face' (`facep and check-face')
1992 *** `frame-update-faces' (not needed)
1993 *** `frame-update-face-colors' (`frame-set-background-mode')
1994 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1995 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1996 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1997 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1998 *** `x-make-font-unbold' (`make-face-unbold')
1999 *** `x-make-font-unitalic' (`make-face-unitalic')
2000 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2001 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2002 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2003 *** `char-bytes' (== 1)
2004 *** `isearch-return-char' (`isearch-printing-char')
2005 *** `make-local-hook' (not needed)
2006 *** `set-screen-height' (`set-frame-height')
2007 *** `set-screen-width' (`set-frame-width')
2009 ** The following obsolete variables and varaliases have been removed
2010 (the appropriate new variable is given in parentheses):
2012 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2013 *** `vc-header-alist' (`vc-BACKEND-header')
2014 *** `directory-sep-char' (== ?/)
2015 *** `font-lock-defaults-alist' (`font-lock-defaults')
2016 *** `e' (`float-e').
2018 ** The following obsolete files were removed:
2019 sc.el, x-menu.el, rnews.el, rnewspost.el
2021 ** The format of the finder-inf.el file has changed, since the Finder
2022 mechanism is now based on the package system. The variable
2023 `finder-package-info' is replaced by `package--builtins' and
2024 `finder-keywords-hash'.
2026 ** When generating autoloads, `update-directory-autoloads' no longer
2027 assumes every inspected file is in your `load-path'. It instead
2028 generates relative names according to the current `load-path'.
2031 * Lisp changes in Emacs 24.1
2033 ** Code can now use lexical scoping by default instead of dynamic scoping.
2034 The `lexical-binding' variable enables lexical scoping for local
2035 variables. It is typically set via a file-local variable in the first
2036 line of the file, in which case it applies to all the code in that
2039 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2040 binding instead of the old dynamic binding mode.
2042 *** Lexically scoped interpreted functions are represented with a new form
2043 of function value which looks like (closure ENV ARGS &rest BODY).
2045 *** New macro `letrec' to define recursive local functions.
2047 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2048 So do `defcustom' and other forms that call `defvar' as a subroutine.
2050 *** New function `special-variable-p' to check whether a variable is
2051 declared as dynamically bound.
2053 *** The form ((lambda ...) ...) is deprecated.
2055 ** An Emacs Lisp testing tool is now included.
2056 Emacs Lisp developers can use this tool to write automated tests for
2057 their code. See the ERT info manual for details.
2059 ** Changes for bidirectional display and editing
2061 *** New function `current-bidi-paragraph-direction'.
2062 This returns the base direction of the paragraph at point.
2064 *** New function `bidi-string-mark-left-to-right'.
2065 Given a string containing characters from right-to-left scripts, this
2066 function returns another string which can be safely inserted into a
2067 buffer, such that any following text will be always displayed to the
2068 right of that string. (This works by appending an invisible Unicode
2069 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2071 This is useful when the buffer has overall left-to-right paragraph
2072 direction and you need to insert a string whose contents are not known
2073 in advance, without disrupting the layout of the line.
2077 *** Window tree functions are accessible in Elisp.
2078 Functions are provided to return the parent, siblings or child windows
2079 of any window including internal windows (windows not associated with a
2080 buffer) in the window tree.
2082 **** New function `window-valid-p' gives non-nil for live and internal
2085 **** Window manipulation can deal with internal windows.
2086 Many window handling functions like `split-window', `delete-window', or
2087 `delete-other-windows' as well as the window resizing functions can now
2088 act on any window including internal ones.
2090 *** window-total-height/-width vs window-body-height/-width.
2091 The function `window-height' has been renamed to `window-total-height'
2092 and `window-width' has been renamed to `window-body-width'. The old
2093 names are provided as aliases. Two new functions `window-total-width'
2094 and `window-body-height' are provided.
2096 *** Window parameters specific to window handling functions.
2097 For each window you can specify a parameter to override the default
2098 behavior of a number of functions like `split-window', `delete-window'
2099 and `delete-other-windows'. The variable `ignore-window-parameters'
2100 allows to ignore processing such parameters.
2102 *** New semantics of third argument of `split-window'.
2103 The third argument of `split-window' has been renamed to SIDE and can be
2104 set to any of the values 'below, 'right, 'above, or 'left to make the
2105 new window appear on the corresponding side of the window that shall be
2106 split. Any other value of SIDE will cause `split-window' to split the
2107 window into two side-by-side windows as before.
2109 *** Window resizing functions.
2110 A new standard function for resizing windows called `window-resize' has
2111 been introduced. This and all other functions for resizing windows no
2112 longer delete any windows when they become too small.
2114 *** Deleting the selected window now selects the most recently selected
2115 live window on that frame instead.
2117 *** `adjust-window-trailing-edge' adjustments.
2118 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2119 is able to resize other windows if a window adjacent to the trailing
2120 edge cannot be shrunk any more. This makes its behavior more similar to
2121 that of Emacs 21 without compromising, however, its inability to delete
2122 windows which was introduced in Emacs 22.
2124 *** Window-local buffer lists.
2125 Windows now have local buffer lists. This means that removing a buffer
2126 from display in a window will preferably show the buffer previously
2127 shown in that window with its previous window-start and window-point
2128 positions. This also means that the same buffer may be automatically
2129 shown twice even if it already appears in another window.
2131 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2132 which if non-nil requires the buffer to be displayed in the currently
2133 selected window, signaling an error otherwise. If nil, another window
2134 can be used, e.g. if the selected one is strongly dedicated.
2136 *** `split-window-vertically' and `split-window-horizontally' renamed
2137 to `split-window-below' and `split-window-right' respectively.
2138 The old names are kept as aliases.
2142 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2143 named ACTION, and takes a display action of the same form as
2144 `display-buffer-base-action' (see Changes, above). A non-nil,
2145 non-list value is treated specially, as the old meaning.
2147 **** New variable `display-buffer-overriding-action'.
2149 **** The procedure of `display-buffer' etc. to choose a window is
2150 determined by combining `display-buffer-overriding-action',
2151 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2152 and `display-buffer-fallback-action'. The second and fourth of these
2153 are user-customizable variables.
2155 See the docstring of `display-buffer' for details.
2157 *** New functions `window-state-get' and `window-state-put'.
2158 These functions allow to save and restore the state of an arbitrary
2159 frame or window as an Elisp object.
2163 *** New variable `completion-extra-properties' used to specify extra
2164 properties of the current completion:
2165 - :annotate-function, same as the old completion-annotate-function.
2166 - :exit-function, function to call after completion took place.
2168 *** Functions on `completion-at-point-functions' can return any of the
2169 properties valid for `completion-extra-properties'.
2171 *** `completion-annotate-function' is obsolete.
2173 *** New `metadata' method for completion tables. The metadata thus returned
2174 can specify various details of the data returned by `all-completions':
2175 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2176 used to select a style in completion-category-overrides.
2177 - `annotation-function' to add annotations in *Completions*.
2178 - `display-sort-function' to specify how to sort entries in *Completions*.
2179 - `cycle-sort-function' to specify how to sort entries when cycling.
2181 *** `minibuffer-local-filename-must-match-map' is not used any more.
2182 Instead, the bindings in `minibuffer-local-filename-completion-map'
2183 are combined with `minibuffer-local-must-match-map'.
2185 *** New variable `completing-read-function' allows overriding the
2186 behavior of `completing-read'.
2188 ** `glyphless-char-display' can now distinguish between graphical and
2189 text terminal display, via a char-table entry that is a cons cell.
2191 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2192 Instead, the offending function is removed.
2196 *** New function `run-hook-wrapped' for running an abnormal hook by
2197 passing the hook functions as arguments to a "wrapping" function.
2198 Like `run-hook-with-args-until-success', it stops at the first
2199 non-nil return value.
2201 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2202 set of "wrapping" filters, similar to around advice.
2203 (A version of this macro was actually added in Emacs 23.2 but was not
2204 advertised at the time.)
2208 *** New macro `condition-case-unless-debug' (this was actually added in
2209 Emacs 23.1 as condition-case-no-debug, but not advertised)
2211 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2213 *** Variable `stack-trace-on-error' removed.
2215 *** The debugger can now "continue" from an error, which means it will
2216 jump to the error handler as if the debugger had not been invoked
2217 instead of jumping all the way to the top-level.
2219 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2220 This can be useful when `inhibit-quit' is set.
2222 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2223 named Emacs server instances.
2225 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2226 to redirect STDOUT to a file.
2228 ** The function `format-time-string' now supports the %N directive,
2229 for higher-resolution time stamps.
2231 ** New input reading functions
2233 *** New function `read-char-choice' reads a restricted set of
2234 characters, discarding any inputs not inside the set.
2236 *** The command `read-color' now requires a match for a color name
2237 or RGB triplet, instead of signaling an error if the user provides
2240 **** `facemenu-read-color' is now an alias for `read-color'.
2242 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2243 The variable is now used to load all kind of supported dynamic libraries,
2244 not just image libraries. The previous name is still available as an
2247 ** Syntax parsing changes
2249 *** New variable `syntax-propertize-function'.
2250 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2251 This allows syntax-table properties to be set independently from font-lock:
2252 just call syntax-propertize to make sure the text is propertized.
2253 Together with this new variable come a new hook
2254 syntax-propertize-extend-region-functions, as well as two helper functions:
2255 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2256 as-is; and syntax-propertize-rules which provides a new way to specify
2259 *** Syntax tables support a new "comment style c" additionally to style b.
2261 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2263 ** frame-local variables cannot be let-bound any more.
2265 ** Major and minor mode changes
2267 *** `set-auto-mode' now respects mode: local variables at the end of files,
2268 as well as those in the -*- line.
2270 *** `prog-mode' is a new major mode from which programming modes
2273 **** `prog-mode-hook' can be used to enable features for programming
2274 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2275 on-the-fly spell checking for comments and strings.
2277 *** New hook `change-major-mode-after-body-hook', run by
2278 `run-mode-hooks' just before any other mode hooks.
2280 *** Enabled globalized minor modes can be disabled in specific major modes.
2281 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2282 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2284 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2286 ** File-handling changes
2288 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2289 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2290 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2291 argument is supplied (see Trash changes, above).
2293 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2295 ** Tool-bars can display separators.
2296 Tool-bar separators are handled like menu separators in menu-bar maps,
2297 i.e. via menu entries of the form `(menu-item "--")'.
2301 *** Animated images support (currently animated gifs only).
2303 **** `image-animated-p' returns non-nil if an image can be animated.
2305 **** `image-animate' animates a supplied image spec.
2307 **** `image-animate-timer' returns the timer object for an image that
2310 *** `image-extension-data' has been renamed to `image-metadata'.
2311 The old name is an obsolete alias to the new one.
2313 *** Image mode can view any image type that ImageMagick supports.
2314 This requires Emacs to be built with ImageMagick support.
2316 **** New function `imagemagick-types', defined if ImageMagick support
2317 is enabled, returns a list of image file extensions that your
2318 ImageMagick installation supports.
2320 **** New function `imagemagick-register-types' enables ImageMagick
2321 image types in Image mode and in `create-image' and other helper
2324 **** New option `imagemagick-types-inhibit' excludes certain
2325 ImageMagick image types from `imagemagick-register-types'.
2327 **** With ImageMagick support, there are extra Image mode commands to
2328 resize and rotate images: `image-transform-fit-to-height',
2329 `image-transform-fit-to-width', `image-transform-set-rotation', and
2330 `image-transform-set-scale'.
2332 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2333 passes it to the mail user agent function. This argument specifies an
2334 action for returning to the caller after finishing with the mail. For
2335 example, this is used by Rmail to optionally delete a mail window.
2337 ** XML and HTML parsing
2338 If Emacs is compiled with libxml2 support, there are two new
2339 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2340 and `libxml-parse-xml-region' (which parses XML). Both return an
2341 Emacs Lisp parse tree.
2343 ** Networking and encryption changes
2345 *** `open-network-stream' can now be used to open an encrypted stream.
2346 It now accepts an optional `:type' parameter for initiating a TLS
2347 connection, directly or via STARTTLS. To do STARTTLS, additional
2348 parameters (`:end-of-command', `:success', `:capabilities-command')
2349 must also be supplied.
2351 *** New library gnutls.el.
2352 The new function `gnutls-available-p' returns non-nil if Emacs is
2353 built with GnuTLS support. The main entry points are
2354 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2355 these functions through `open-network-stream', because that can
2356 upgrade connections through STARTTLS opportunistically or use plain
2357 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2360 *** New primitive `secure-hash' that supports many secure hash algorithms:
2361 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2362 sha1.el has been removed. The `sha1' feature is provided by default.
2366 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2368 ** Progress reporters can now "spin".
2369 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2370 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2371 time you call `progress-reporter-update' on that progress reporter,
2372 with a nil or omitted VALUE argument, the reporter message is
2373 displayed with a "spinning bar".
2375 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2376 being reverted, even if the buffer has a local `revert-buffer-function'.
2378 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2379 If delayed-warnings-list is non-nil, the command loop calls
2380 `delayed-warnings-hook' after `post-command-hook'. At present, this
2381 is only used by Emacs on some platforms to display warnings during
2382 startup, which might otherwise not be noticed. This uses the
2383 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2385 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2387 ** New function `make-composed-keymap' that constructs a new keymap
2388 from multiple input maps. You can use this to make a keymap that
2389 inherits from multiple maps, eg:
2390 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2392 ** New function `string-prefix-p'.
2393 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2395 ** New reader macro ## that stands for the empty symbol.
2396 This means that the empty symbol can now be read back. Also, #: by itself
2397 (when not immediately followed by a possible symbol character) stands for
2398 an empty uninterned symbol.
2400 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2402 ** The following functions and variables are obsolete:
2404 *** `tooltip-use-echo-area' is obsolete.
2405 Rather than setting this to t, disable Tooltip mode instead.
2407 *** buffer-substring-filters is obsolete.
2408 Use `filter-buffer-substring-functions' instead.
2410 *** `byte-compile-disable-print-circle' is obsolete.
2412 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2413 Use `post-command-hook' instead.
2415 *** `font-lock-maximum-size' is obsolete.
2418 * Changes in Emacs 24.1 on non-free operating systems
2420 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2421 and also when HOME is set to C:\ by default.
2423 ** New configure.bat options
2425 *** --enable-checking builds Emacs with extra runtime checks.
2427 *** --distfiles specifies files to be included in binary distribution.
2429 *** --without-gnutls disables automatic GnuTLS detection.
2431 *** --lib for general library linkage, works with the USER_LIBS build variable.
2433 ** New make target `dist' to create binary distribution for MS Windows.
2435 ** The Lisp function `w32-default-color-map' is now obsolete.
2436 (It is only used internally in the Emacs C code.)
2438 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2439 reappear on mouse-over. (Requires OS X 10.6 or later.)
2441 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2442 other platforms, rather than inserting its contents into the buffer.
2445 ----------------------------------------------------------------------
2446 This file is part of GNU Emacs.
2448 GNU Emacs is free software: you can redistribute it and/or modify
2449 it under the terms of the GNU General Public License as published by
2450 the Free Software Foundation, either version 3 of the License, or
2451 (at your option) any later version.
2453 GNU Emacs is distributed in the hope that it will be useful,
2454 but WITHOUT ANY WARRANTY; without even the implied warranty of
2455 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2456 GNU General Public License for more details.
2458 You should have received a copy of the GNU General Public License
2459 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2464 paragraph-separate: "[
\f]*$"