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'.
325 *** `cl-labels' is slightly different from `labels'.
326 The difference is that it relies on the `lexical-binding' machinery (as opposed
327 to the `lexical-let' machinery used previously) to capture definitions in
328 closures, so such closures will only work if `lexical-binding' is in use.
331 *** `cl-letf' is not exactly like `letf'.
332 The only difference is in details that relate to some deprecated usage
333 of `symbol-function' in place forms.
336 *** `progv' was rewritten to use the `let' machinery.
337 A side effect is that vars without corresponding value are bound to nil
338 rather than making them unbound.
341 *** The following methods of extending `setf' are obsolete
342 (use features from gv.el instead):
343 `define-modify-macro' (use `gv-letplace')
344 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
345 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
346 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
349 ** New compilation option `compilation-always-kill'.
353 *** `custom-reset-button-menu' now defaults to t.
355 *** Non-option variables are never matched in `customize-apropos' and
356 `customize-apropos-options' (i.e. the prefix argument does nothing for
360 ** `desktop-path' no longer includes the "." directory.
361 Desktop files are now located in ~/.emacs.d by default.
366 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
369 *** The D-Bus object manager interface is implemented.
372 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
373 if their value does not fit into Emacs's integer range.
376 *** The function `dbus-call-method' works non-blocking now, it can be
377 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
380 *** Signals can be sent also as unicast message.
383 *** The argument list of `dbus-register-signal' has been extended,
384 according to the new match rule types of D-Bus. See the manual for
388 *** `dbus-init-bus' supports private connections.
391 *** There is a new function `dbus-setenv'.
396 *** Changes are now highlighted using the same color scheme as in
397 modern VCSes. Deletions are displayed in red (new faces
398 `diff-refine-removed' and `smerge-refined-removed', and new definition
399 of `diff-removed'), insertions in green (new faces `diff-refine-added'
400 and `smerge-refined-added', and new definition of `diff-added').
403 *** The variable `diff-use-changed-face' defines whether to use the
404 face `diff-changed', or `diff-removed' and `diff-added' to highlight
405 changes in context diffs.
408 *** The new command `diff-delete-trailing-whitespace' removes trailing
409 whitespace introduced by a diff.
413 *** `dired-do-async-shell-command' executes each file sequentially
414 if the command ends in `;' (when operating on multiple files).
415 Otherwise, it executes the command on each file in parallel.
417 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
418 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
421 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
422 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
423 mark/unmark/flag all files in the active region.
425 *** The minibuffer default for `=' (`dired-diff) has changed.
426 It is now the backup file for the file at point, if one exists.
427 In Transient Mark mode the default is the file at the active mark.
429 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
430 The global binding for `M-=', `count-words-region' is in effect.
433 ** Ediff now uses the same color scheme as Diff mode.
437 *** New package `erc-desktop-notifications.el', which can send a notification
438 when you receive a private message or your nickname is mentioned.
440 *** ERC will look up server/channel names via auth-source and use any
443 ** Flymake uses fringe bitmaps to indicate errors and warnings.
444 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
445 `flymake-warning-bitmap'.
448 ** Follow mode no longer works by using advice.
449 The option `follow-intercept-processes' has been removed.
452 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
453 specifying URL types that should be converted to remote file names at
454 the FFAP prompt. The default is now '("ftp").
457 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
458 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
461 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
464 ** New option `mouse-avoidance-banish-position' specifies where the
465 `banish' mouse avoidance setting moves the mouse.
468 ** notifications.el supports now version 1.2 of the Notifications API.
469 The function `notifications-get-capabilities' returns the supported
473 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
474 closing brackets to be aligned with the line of the opening bracket.
477 ** In Proced mode, new command `proced-renice' renices marked processes.
482 A new version of python.el, which provides several new features, including:
483 per-buffer shells, better indentation, Python 3 support, and improved
484 shell-interaction compatible with iPython (and virtually any other
487 *** Some user options have been replaced/renamed:
488 Old defcustom: | New defcustom:
489 python-indent | python-indent-offset
490 python-guess-indent | python-indent-guess-indent-offset
491 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
492 python-use-skeletons | python-skeleton-autoinsert
494 *** Some user options have been removed:
496 **** `python-indent-string-contents': Strings are never indented.
498 **** `python-honour-comment-indentation':
499 Comments are never considered as indentation markers themselves.
501 **** `python-continuation-offset': Indentation is automatically
502 calculated in a pep8 compliant way depending on the context.
504 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
505 Have no direct mapping as the shell interaction is completely different.
507 **** `python-python-command', `python-jython-command':
508 Replaced by `python-shell-interpreter'.
510 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
511 `python-pdbtrack-minor-mode-string', `python-source-modes':
514 *** Some commands have been replaced:
515 Old command | New command
516 python-insert-class | python-skeleton-class
517 python-insert-def | python-skeleton-def
518 python-insert-for | python-skeleton-for
519 python-insert-if | python-skeleton-if
520 python-insert-try/except | python-skeleton-try
521 python-insert-try/finally | python-skeleton-try
522 python-insert-while | python-skeleton-while
523 python-find-function | python-nav-jump-to-defun
524 python-next-statement | python-nav-forward-sentence
525 python-previous-statement | python-nav-backward-sentence
526 python-send-buffer | python-shell-send-buffer
527 python-send-defun | python-shell-send-defun
528 python-send-region | python-shell-send-region
529 python-send-region-and-go | Emulate with python-shell-send-region and
530 python-shell-switch-to-shell
531 python-send-string | python-shell-send-string
532 python-switch-to-python | python-shell-switch-to-shell
533 python-describe-symbol | python-eldoc-at-point
536 ** reStructuredText mode
538 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
539 fontification, comment handling, and customization have all been revised
542 *** Support for `imenu' and `which-function-mode'.
544 *** The reStructuredText syntax is more closely covered.
545 Sphinx support has been improved.
547 *** `rst-insert-list' inserts new list or continues existing lists.
549 *** A negative prefix argument always works for `rst-adjust'.
551 *** The window configuration is reset after displaying a TOC.
553 *** The constant `rst-version' describes the rst.el package version.
558 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
560 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
562 *** `sh-use-smie' lets you choose a new indentation and navigation code.
565 ** New option `async-shell-command-buffer' specifies the buffer to use
566 for a new asynchronous `shell-command' when the default output buffer
567 `*Async Shell Command*' is already in use.
570 ** SQL mode has a new option `sql-db2-escape-newlines'.
571 If non-nil, newlines sent to the command interpreter will be escaped
572 by a backslash. The default does not escape the newlines and assumes
573 that the sql statement will be terminated by a semicolon.
575 ** Tabulated List and packages derived from it
577 *** New command `tabulated-list-sort', bound to `S', sorts the column
578 at point, or the Nth column if a numeric prefix argument is given.
582 *** The variables `term-default-fg-color' and `term-default-bg-color' are
583 now deprecated in favor of the customizable face `term'.
585 *** You can customize how to display ANSI terminal colors and styles
586 by customizing the corresponding `term-color-<COLOR>',
587 `term-color-underline' and `term-color-bold' faces.
591 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
592 See the manual for details.
594 *** Remote processes are now supported also on remote Windows host.
598 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
599 Previously, this slot stored semicolon-separated attribute-value pairs
600 appended to some imap URLs, but this is not compatible with RFC 3986.
601 So now the `filename' slot stores the entire path and query components
602 and the `attributes' slot is always nil.
604 *** New function `url-encode-url' for encoding a URI string.
605 The `url-retrieve' function now uses this to encode its URL argument,
606 in case that is not properly encoded.
611 *** The free software compiler GHDL is supported (and now the default).
613 *** Support for the VHDL-AMS packages has been added/updated.
615 *** Updated to the 2002 revision of the VHDL standard.
617 *** Accepts \r and \f as whitespace.
620 ** `which-func-modes' now defaults to t, so Which Function mode, when
621 enabled, applies to all applicable major modes.
624 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
627 ** FIXME something happened to ses.el, 2012-04-17.
629 ** Hooks renamed to avoid obsolete "-hooks" suffix:
630 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
631 *** semantic-change-hooks -> semantic-change-functions
632 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
633 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
634 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
635 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
636 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
637 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
638 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
639 *** rcirc-activity-hooks -> rcirc-activity-functions
640 *** rcirc-print-hooks -> rcirc-print-functions
641 *** dbus-event-error-hooks -> dbus-event-error-functions
642 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
643 *** checkdoc-style-hooks -> checkdoc-style-functions
644 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
645 *** archive-extract-hooks -> archive-extract-hook
646 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
647 *** hfy-post-html-hooks -> hfy-post-html-hook
648 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
649 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
650 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
651 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
653 ** Obsolete packages:
656 In most cases, assoc+member+push+delq work just as well.
657 And in any case it's just a terrible package: ugly semantics, terrible
658 inefficiency, and not namespace-clean.
673 * Incompatible Lisp Changes in Emacs 24.3
676 ** set-buffer-multibyte now signals an error in narrowed buffers.
679 ** (random) by default now returns a different random sequence in
680 every Emacs run. Use (random S), where S is a string, to set the
681 random seed to a value based on S, in order to get a repeatable
682 sequence in later calls.
685 ** The function `x-select-font' can return a font spec, instead of a
686 font name as a string. Whether it returns a font spec or a font name
687 depends on the graphical library.
690 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
691 that substring is inserted literally even if the LITERAL arg is
692 non-nil, instead of causing an error to be signaled.
695 ** Docstrings starting with `*' no longer indicate user options.
696 Only variables defined using `defcustom' are considered user options.
697 The function `user-variable-p' is now an obsolete alias for
701 ** The return values of `defalias', `defun' and `defmacro' have changed,
702 and are now undefined. For backwards compatibility, defun and
703 defmacro currently return the name of the newly defined function/macro
704 but this should not be relied upon.
707 ** `face-spec-set' no longer sets frame-specific attributes when the
708 third argument is a frame (that usage was obsolete since Emacs 22.2).
711 ** The arguments of `dbus-register-signal' are no longer just strings,
712 but keywords or keyword-string pairs. The old argument list will
713 still be supported for Emacs 24.x.
716 ** The CL package's `get-setf-method' function no longer exists.
717 Generalized variables are now part of core Emacs Lisp, and implemented
718 differently to the way cl.el used to do it. It is not possible to
719 define a compatible replacement for `get-setf-method'. See the file
720 gv.el for internal details of the new implementation.
723 Some Lisp symbols have been renamed to avoid problems with spelling
724 that is incorrect or inconsistent with how Emacs normally spells a word.
727 *** Renamed functions
729 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
730 **** inactivate-input-method -> deactivate-input-method
731 **** quail-inactivate -> quail-deactivate
732 **** robin-inactivate -> robin-deactivate
733 **** viper-inactivate-input-method -> viper-deactivate-input-method
734 **** viper-inactivate-input-method-action ->
735 viper-deactivate-input-method-action
736 **** ucs-input-inactivate -> ucs-input-deactivate
740 The old hooks are still supported for backward compatibility, but they
741 are deprecated and will be removed eventually.
742 **** input-method-inactivate-hook -> input-method-deactivate-hook
743 **** robin-inactivate-hook -> robin-deactivate-hook
744 **** quail-inactivate-hook -> quail-deactivate-hook
747 *** Renamed Lisp variables
748 **** follow-deactive-menu -> follow-inactive-menu
749 **** inactivate-current-input-method-function ->
750 deactivate-current-input-method-function
753 ** Some obsolete functions, variables, and faces have been removed:
754 *** `last-input-char', `last-command-char', `unread-command-char'
755 *** `facemenu-unlisted-faces'
756 *** `rmail-decode-mime-charset'
757 *** `iswitchb-read-buffer'
758 *** `sc-version', `sc-submit-bug-report'
759 *** `set-char-table-default'
760 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
761 *** `compile-internal'
763 *** `mode-line-inverse-video'
764 *** `follow-mode-off-hook'
765 *** `cvs-commit-buffer-require-final-newline'
766 (use `log-edit-require-final-newline' instead)
767 *** `cvs-changelog-full-paragraphs'
768 (use `log-edit-changelog-full-paragraphs' instead)
769 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
770 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
771 *** `vc-master-templates' (use `vc-handled-backends' instead)
772 *** `vc-checkout-carefully'
775 * Lisp changes in Emacs 24.3
777 ** New sampling-based Elisp profiler.
778 Try M-x profiler-start, do some work, and then call M-x profiler-report.
779 When finished, use M-x profiler-stop. The sampling rate can be based on
780 CPU time (only supported on some systems) or memory allocations.
783 ** CL-style generalized variables are now in core Elisp.
784 `setf' is autoloaded; `push' and `pop' accept generalized variables.
785 You can define your own generalized variables using `gv-define-simple-setter',
786 `gv-define-setter', etc.
789 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
790 The interpretation of the DECLS is determined by `defun-declarations-alist'.
794 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
795 of `read-regexp' accepts a string ending with a colon and space, and its
796 second argument DEFAULTS can be a list of strings accessible via M-n
797 in the minibuffer ahead of other hard-coded useful regexp-related values.
798 More commands use `read-regexp' now to read their regexp arguments.
802 *** New function `completion-table-with-quoting' to handle completion
803 in the presence of quoting, such as file completion in shell buffers.
805 *** New function `completion-table-subvert' to use an existing completion
806 table, but with a different prefix.
811 *** New error type and new function `user-error'.
812 These do not trigger the debugger.
815 *** New option `debugger-bury-or-kill', saying what to do with the
816 debugger buffer when exiting debug.
819 *** Set `debug-on-message' to enter the debugger when a certain
820 message is displayed in the echo area. This can be useful when trying
821 to work out which code is doing something.
823 *** New var `inhibit-debugger', automatically set to prevent accidental
824 recursive invocations.
828 *** The functions get-lru-window, get-mru-window and get-largest-window
829 now accept a third argument to avoid choosing the selected window.
831 *** Additional values recognized for option `window-combination-limit'.
833 *** New macro `with-temp-buffer-window'.
835 *** `temp-buffer-resize-mode' no longer resizes windows that have been
838 *** New function `fit-frame-to-buffer' and new options
839 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
841 *** New option switch-to-buffer-preserve-window-point to restore a
842 window's point when switching buffers.
844 *** New display action functions `display-buffer-below-selected',
845 and `display-buffer-in-previous-window'.
847 *** New display action alist entry `inhibit-switch-frame', if non-nil,
848 tells display action functions to avoid changing which frame is
851 *** New display action alist entry `pop-up-frame-parameters', if
852 non-nil, specifies frame parameters to give any newly-created frame.
854 *** New display action alist entry `previous-window', if non-nil,
855 specifies window to reuse in `display-buffer-in-previous-window'.
857 *** New display action alist entries `window-height' and `window-width'
858 to specify size of new window created by `display-buffer'.
860 *** The following variables are obsolete, as they can be replaced by
861 appropriate entries in the `display-buffer-alist' function introduced
864 **** `display-buffer-reuse-frames'
866 **** `special-display-regexps'
868 **** `special-display-frame-alist'
870 **** `special-display-buffer-names'
872 **** `special-display-function'
874 **** `display-buffer-function'
876 **** `dired-shrink-to-fit'
880 *** `current-time-string' no longer requires that its argument's year
881 must be in the range 1000..9999. It now works with any year supported
882 by the underlying C implementation.
884 *** `current-time' now returns extended-format time stamps
885 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
886 PSEC is typically a multiple of 1000 on current machines. Other
887 functions that use this format, such as file-attributes and
888 format-time-string, have been changed accordingly. Old-format time
889 stamps are still accepted.
891 *** The format of timers in timer-list and timer-idle-list is now
892 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
893 The PSECS slot is new, and uses picosecond resolution. It can be
894 accessed via the new timer--psecs accessor.
896 *** Last-modified time stamps in undo lists now are of the form
897 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
900 ** Floating point functions now always return special values like NaN,
901 instead of signaling errors, if given invalid args, e.g. (log -1.0).
902 Previously, they returned NaNs on some platforms but signaled errors
903 on others. The affected functions are acos, asin, tan, exp, expt,
904 log, log10, sqrt, and mod.
906 ** Interpreted files are eagerly macro-expanded during load.
907 This can significantly speed up execution of non-byte-compiled code,
908 but can also bump into harmless and previously unnoticed cyclic
909 dependencies. These should not be fatal: they will simply cause the
910 macro-calls to be left for later expansion (as before), but will also
911 result in a warning ("Eager macro-expansion skipped due to cycle")
912 describing the cycle.
914 ** Miscellaneous new functions:
916 *** `autoloadp' tests if its argument is an autoloaded object.
918 *** `autoload-do-load' performs the autoloading operation.
920 *** `buffer-narrowed-p' tests if the buffer is narrowed.
922 *** `file-name-base' returns a file name sans directory and extension.
924 *** `function-get' fetches a function property, following aliases.
926 *** `posnp' tests if an object is a `posn'.
927 *** `set-temporary-overlay-map' sets up a temporary overlay map.
929 *** `system-users' returns the user names on the system.
931 *** `system-groups' returns the group names on the system.
933 *** `tty-top-frame' returns the topmost frame of a text terminal.
936 ** New macros `setq-local' and `defvar-local'.
939 ** New fringe bitmap `exclamation-mark'.
941 ** Face underlining can now use a wave.
942 See the "Face Attributes" section of the Elisp manual.
944 ** The following functions and variables are obsolete:
946 *** `automount-dir-prefix' (use `directory-abbrev-alist')
948 *** `buffer-has-markers-at'
950 *** `macro-declaration-function' (use `macro-declarations-alist')
952 *** `window-system-version' (provides no useful information)
954 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
956 *** `query-replace-interactive'
958 *** `font-list-limit' (has had no effect since Emacs < 23)
961 * Changes in Emacs 24.3 on non-free operating systems
964 ** Cygwin builds can use the native MS Windows user interface.
965 Pass --with-w32 to configure. The default remains the X11 interface.
967 ** Two new functions are available in Cygwin builds:
968 `cygwin-convert-path-from-windows' and `cygwin-convert-path-to-windows'.
969 These functions allow Lisp code to access the Cygwin file-name mapping
970 machinery to convert between Cygwin and Windows-native file names.
972 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
973 Emacs now supports mouse highlight, help-echo (in the echo area), and
974 `mouse-autoselect-window'.
977 ** On MS Windows Vista and later Emacs now supports symbolic links.
980 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
981 support for libxml2, even if its presence is detected.
984 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
987 ** On Mac OS X, configure no longer automatically adds the Fink /sw
988 directories to the search path. You must add them yourself if you want them.
991 * Changes in Emacs 24.2
993 ** This is mainly a bug-fix release.
996 * Installation Changes in Emacs 24.1
998 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
999 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1000 also depend on Gtk+. You can disable them with --without-rsvg and
1003 ** Emacs can be compiled with GnuTLS support.
1004 This happens by default if a suitably recent version of the library is
1005 found at build time. To prevent this, use the configure option
1006 `--without-gnutls'. See below for GnuTLS features.
1008 ** Emacs can be compiled with SELinux support.
1009 This happens by default if a suitably recent version of the library is
1010 found at build time. To prevent this, use the configure option
1011 `--without-selinux'. See below for SELinux features.
1013 ** Emacs can be compiled with ImageMagick support.
1014 This happens by default if a suitably recent version of the library is
1015 found at build time. To prevent this, use the configure option
1016 `--without-imagemagick'. See below for ImageMagick features.
1017 This feature is not available for the Nextstep or MS ports.
1019 ** Emacs can be compiled with libxml2 support.
1020 This happens by default if a suitably recent version of the library is
1021 found at build time. To prevent this, use the configure option
1022 `--without-xml2'. See below for libxml2 features.
1024 ** By default, the installed Info and man pages are compressed.
1025 You can disable this by configuring --without-compress-info.
1027 ** New configure option --with-wide-int.
1028 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1029 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1032 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1033 These provide no new functionality, they just remove the need to edit
1034 lib-src/Makefile by hand in order to use the associated features.
1036 ** New configure option --enable-use-lisp-union-type.
1037 This is only useful for Emacs developers to debug certain types of bugs.
1038 This is not a new feature; only the configure flag is new.
1040 ** The standalone programs digest-doc and sorted-doc are removed.
1041 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1043 ** The standalone program `fakemail' is removed.
1044 If you need it, feedmail.el provides a superset of the functionality.
1047 * Startup Changes in Emacs 24.1
1049 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1050 command line arguments, and the EMACS_UNIBYTE environment variable, no
1051 longer have any effect. (They were declared obsolete in Emacs 23.)
1053 ** New command line option `--no-site-lisp' removes site-lisp directories
1054 from load-path. -Q now implies this. This option does not affect the
1055 EMACSLOADPATH environment variable (and hence has no effect for
1059 * Changes in Emacs 24.1
1063 *** Many packages now use the `completion-at-point' command,
1064 rather than implementing separate completion commands.
1066 *** `completion-at-point' now handles tags and semantic completion.
1068 *** Completion in a non-minibuffer now tries to detect the end of completion
1069 and pops down the *Completions* buffer accordingly.
1071 *** New option `completion-cycle-threshold' allows completion cycling.
1073 *** New option `completion-category-overrides' for overriding the
1074 default completion style in certain circumstances.
1076 *** New completion style `substring'.
1078 *** Completion of buffer names uses `substring' completion by default.
1080 *** The option `widget-complete-field' has been removed.
1084 *** The first time you try sending mail, Emacs asks for a mail method.
1085 This is implemented by a new default for `send-mail-function', which
1086 is `sendmail-query-once'. This offers to use the smtpmail package, or
1087 to use the old defaults relying on external mail facilities
1088 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1089 `mailclient-send-it' on Windows).
1091 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1092 the report to your desktop's preferred mail client, if there is one.
1093 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1095 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1096 and Mail mode changes
1098 ** Emacs server and client changes
1100 *** New option `server-port' specifies the port for TCP Emacs servers.
1102 *** New emacsclient argument -q/--quiet suppresses some status messages.
1104 *** New emacsclient argument --frame-parameters specifies the frame
1105 parameters of any newly-created graphical frame.
1107 *** If emacsclient shuts down due to Emacs signaling an error,
1108 its exit status is 1.
1110 *** New emacsclient argument --parent-id ID.
1111 This opens a client frame in parent X window ID, via XEmbed, similar
1112 to the --parent-id argument to Emacs.
1114 ** Internationalization changes
1116 *** Emacs now supports display and editing of bidirectional text.
1117 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1118 displayed in the correct visual order as expected by users of those
1119 scripts. The display reordering is a "full bidirectionality" class
1120 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1121 with no RTL text should look exactly the same as before.
1123 **** New buffer-local variable `bidi-display-reordering'.
1124 To disable display reordering in a buffer, change this to nil.
1126 **** New buffer-local variable `bidi-paragraph-direction'.
1127 If nil (the default), Emacs determines the base direction of each
1128 paragraph from its text, as specified by the UBA. Setting the value
1129 to `right-to-left' or `left-to-right' forces a base direction on each
1132 Paragraphs with right-to-left base direction are displayed starting at
1133 the right window edge.
1135 *** Enhanced support for characters with no glyphs in available fonts,
1136 or, on text terminals, characters that cannot be encoded by the
1137 terminal coding system. The new option `glyphless-char-display-control'
1138 specifies how to display them: as a hexadecimal code in a box, a thin
1139 1-pixel space, an empty box, etc.
1141 *** New input methods for Farsi and Bulgarian
1142 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1144 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1145 (U+2010 and U+2011).
1147 *** New Hebrew translation of the Emacs Tutorial.
1148 Type `C-u C-h t' to choose it in case your language setup doesn't
1149 automatically select it.
1151 ** An Emacs Lisp package manager is now included.
1152 This is a convenient way to download and install additional packages,
1153 from a package repository at http://elpa.gnu.org.
1155 *** M-x list-packages shows a list of packages, which can be
1156 selected for installation.
1158 *** New command `describe-package', bound to `C-h P'.
1160 *** By default, all installed packages are loaded automatically when
1161 Emacs starts up. To disable this, set `package-enable-at-startup' to
1162 nil. To specify the packages to load, customize `package-load-list'.
1164 ** Custom theme changes
1166 *** New command `M-x customize-themes', which provides a convenient
1167 interface for enabling and disabling Custom themes.
1169 *** New option `custom-theme-load-path' is the load path for themes.
1170 Emacs no longer looks for Custom themes in `load-path'. The default
1171 value of `custom-theme-load-path' says to look for themes in
1172 `custom-theme-directory', followed by a subdirectory of
1173 `data-directory' named "themes/", which contains a small selection of
1174 built-in Custom themes.
1176 *** New option `custom-safe-themes' records known-safe theme files.
1177 If a theme is not in this list, Emacs queries before loading it, and
1178 offers to save the theme to `custom-safe-themes' automatically. By
1179 default, all themes included in Emacs are treated as safe.
1181 ** Improved GTK integration
1183 *** GTK scroll-bars are now placed on the right by default.
1184 The function `set-scroll-bar-mode' can change this.
1186 *** GTK tool bars can have just text, just images or images and text.
1187 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1188 the default is taken from desktop settings.
1190 *** GTK tool bars can be placed on any edge of the frame.
1191 The frame-parameter tool-bar-position controls this. It takes the
1192 values top, left, right or bottom. The Options => Show/Hide menu has
1195 *** The default colors for selected text (the `region' face) are taken
1196 from the GTK theme when Emacs is built with GTK.
1198 *** Emacs uses GTK tooltips by default if built with GTK.
1199 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1201 ** Graphical interface changes
1203 *** On graphical displays, the mode-line no longer ends in dashes.
1204 Also, the first dash (which does not indicate anything) is just
1205 displayed as a space.
1207 *** `menu-bar-select-buffer-function' lets you choose another operation
1208 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1210 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1211 built with Xft. These fonts can be set via X resources, for example:
1212 Emacs.pane.menubar.font: Courier-12
1216 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1217 or if it receives a SIGINT signal in batch mode.
1219 *** `kill-emacs-hook' is now also run in batch mode.
1220 Third-party code which adds to `kill-emacs-hook' should check if they
1221 do the right thing in batch mode.
1223 ** Scrolling changes
1225 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1226 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1227 of buffer at first key-press (instead they move to top/bottom of buffer)
1228 when `scroll-error-top-bottom' is non-nil.
1230 *** New option `scroll-error-top-bottom' (see above).
1232 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1233 scroll a line instead of full screen.
1235 *** New property `scroll-command' should be set on a command's symbol to
1236 define it as a scroll command affected by `scroll-preserve-screen-position'.
1238 *** If you customize `scroll-conservatively' to a value greater than 100,
1239 Emacs will never recenter point in the window when it scrolls due to
1240 cursor motion commands or commands that move point (e.f., `M-g M-g').
1241 Previously, you needed to use `most-positive-fixnum' as the value of
1242 `scroll-conservatively' to achieve the same effect.
1244 *** "Aggressive" scrolling now honors the scroll margins.
1245 If you customize `scroll-up-aggressively' or
1246 `scroll-down-aggressively' and move point off the window, Emacs now
1247 scrolls the window so as to avoid positioning point inside the scroll
1250 ** Basic SELinux support has been added.
1251 This requires Emacs to be linked with libselinux at build time.
1253 *** Emacs preserves the SELinux file context when backing up.
1254 Also, the function `copy-file' has an extra optional argument for
1255 preserving SELinux context, and the return value of `backup-buffer'
1256 now includes the SELinux context.
1258 *** New functions `file-selinux-context' and `set-file-selinux-context'
1259 get and set the SELinux context of a file.
1263 *** `delete-by-moving-to-trash' now only affects commands that specify
1264 trashing. This avoids inadvertently trashing temporary files.
1266 *** Calling `delete-file' or `delete-directory' with a prefix argument
1267 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1269 ** File- and directory-local variable changes
1271 *** You can stop directory local vars from applying to subdirectories.
1272 Add an element (subdirs . nil) to the alist portion of any variables
1273 settings to indicate that the section should not apply to
1276 *** Directory local variables can apply to some file-less buffers.
1277 Affected modes include dired, vc-dir, and log-edit. For example,
1278 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1279 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1280 `hack-dir-local-variables-non-file-buffer' to support this.
1282 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1283 Instead, use "eval: (minor-mode 1)".
1285 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1286 to `inhibit-local-variables-regexps'. As the name suggests, it now
1287 applies to ALL file local variables, not just -*- lines. The
1288 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1293 *** The `quit-window' command now restores the last buffer displayed
1294 in the quitted window.
1296 *** Resizing an Emacs frame now preserves proportional window sizes,
1297 modulo restrictions like window minimum sizes and fixed-size windows.
1299 *** The behavior of `display-buffer' is now customizable in detail.
1301 **** New option `display-buffer-base-action' specifies a list of
1302 user-determined display "actions" (functions and optional arguments
1303 for choosing the displaying window).
1305 This takes precedence over the default display action, which is
1306 specified by `display-buffer-fallback-action'.
1308 **** New option `display-buffer-alist' maps buffer name regexps to
1309 display actions, taking precedence over `display-buffer-base-action'.
1311 *** New option `window-combination-limit'.
1312 The new option `window-combination-limit' allows to return the space
1313 obtained for resizing or creating a window more reliably to the window
1314 from which such space was obtained.
1316 *** New option `window-combination-resize'.
1317 The new option `window-combination-resize' allows to split a window that
1318 otherwise cannot be split because it's too small by stealing space from
1319 other windows in the same combination. Subsequent resizing or deletion
1320 of the window will resize all windows in the same combination as well.
1322 *** New option `frame-auto-hide-function' lets you choose between
1323 iconifying or deleting a frame when burying a buffer in a dedicated
1324 frame, or quitting a window showing a buffer in a frame of its own.
1326 *** New commands `maximize-window' and `minimize-window'.
1327 These maximize and minimize the size of a window within its frame.
1329 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1330 These functions allow to navigate through the live buffers that have
1331 been shown in a specific window.
1333 ** Minibuffer changes
1335 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1336 This is handy for minibuffer-only frames, and is also used for the feature
1337 where mouse-1 pops up *Messages*"', which can now easily be changed.
1339 *** Minibuffers set `truncate-lines' to nil.
1340 If you want to change the value to something else, you could use
1341 for example `minibuffer-setup-hook'.
1343 ** `auto-mode-case-fold' is now enabled by default.
1345 ** `backup-by-copying-when-mismatch' now defaults to t.
1347 ** New basic faces `error', `warning', `success'.
1348 These are used to highlight text indicating failure, caution or
1349 successful operation.
1351 ** New option `list-colors-sort' defines the color sort order
1352 for `list-colors-display'.
1354 ** The variable `focus-follows-mouse' now always defaults to nil.
1357 * Editing Changes in Emacs 24.1
1361 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1362 `isearch-yank-line'.
1364 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1365 `isearch-yank-kill'.
1367 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1369 ** New commands `count-words-region' and `count-words'.
1371 *** M-= is bound to `count-words-region', not `count-lines-region'.
1372 The `count-words-region' command, when called interactively, reports
1373 the number of lines, words, and characters in the region. It is a
1374 superset of the old `count-lines-region', which is now an obsolete
1377 ** The command `just-one-space' (M-SPC), if given a negative argument,
1378 also deletes newlines around point.
1382 *** New option `delete-active-region'.
1383 If non-nil, [delete] and DEL delete the region if it is active and no
1384 prefix argument is given. If set to `kill', those commands kill
1387 *** New command `delete-forward-char', bound to [delete].
1388 This is meant for interactive use, and obeys `delete-active-region'.
1389 The command `delete-char' does not obey `delete-active-region'.
1391 *** `delete-backward-char' is now a Lisp function.
1392 Apart from obeying `delete-active-region', its behavior is unchanged.
1393 However, the byte compiler now warns if it is called from Lisp; Lisp
1394 callers should use delete-char with a negative argument instead.
1396 *** The option `mouse-region-delete-keys' has been deleted.
1398 ** Selection changes.
1400 The default handling of clipboard and primary selections has been
1401 changed to conform with modern X applications. In short, most
1402 commands for killing and yanking text now use the clipboard, while
1403 mouse commands use the primary selection.
1405 In the following, we provide a list of these changes, followed by a
1406 list of steps to get the old behavior back if you prefer that.
1408 *** `select-active-regions' now defaults to t.
1409 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1410 the kill ring. The selected text is put in the primary selection, if
1411 the system possesses a separate primary selection facility (e.g. X).
1413 **** `select-active-regions' also accepts a new value, `only'.
1414 This means to only set the primary selection for temporarily active
1415 regions (usually made by mouse-dragging or shift-selection);
1416 "ordinary" active regions, such as those made with C-SPC followed by
1417 point motion, do not alter the primary selection.
1419 **** `mouse-drag-copy-region' now defaults to nil.
1421 *** mouse-2 is now bound to `mouse-yank-primary'.
1422 This pastes from the primary selection, ignoring the kill-ring.
1423 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1425 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1427 *** `x-select-enable-primary' now defaults to nil.
1428 Thus, commands that kill text or copy it to the kill-ring (such as
1429 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1431 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1432 exactly equivalent to M-w, C-w, and C-y respectively.
1434 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1435 non-nil by default, as Windows does not support the primary selection
1436 between applications.
1438 *** To return to the previous behavior, do the following:
1440 **** Change `select-active-regions' to nil.
1441 **** Change `mouse-drag-copy-region' to t.
1442 **** Change `x-select-enable-primary' to t (on X only).
1443 **** Change `x-select-enable-clipboard' to nil.
1444 **** Bind `mouse-yank-at-click' to mouse-2.
1446 *** Support for X cut buffers has been removed.
1448 *** X clipboard managers are now supported.
1449 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1451 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1452 in the current rectangle. With a prefix argument, this prompts for a
1453 number to count from and for a format string.
1455 ** `redisplay-dont-pause' now defaults to t.
1456 This makes Emacs feel more responsive to editing commands that arrive
1457 at high rate, e.g. if you lean on some key, because stopping redisplay
1458 in the middle (when this variable is nil) forces more expensive
1459 updates later on, and Emacs appears to be unable to keep up.
1461 ** The behavior of <TAB> for active regions in Text mode has changed.
1462 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1463 when the region is active causes Emacs to indent all the lines in the
1464 region, aligning them with the line previous to the first line in the
1465 region (or with the left margin if there is no previous line).
1467 ** When `occur' is called with a prefix argument, matching strings are
1468 collected into the `*Occur*' buffer without line numbers. If there
1469 are parenthesized subexpressions in the specified regexp, `occur'
1470 reads replacement text that may contain \\& and \\N whose convention
1471 follows `replace-match'.
1474 * Changes in Specialized Modes and Packages in Emacs 24.1
1476 ** Archive Mode has basic support for browsing and updating 7z archives.
1480 *** BibTeX mode now supports biblatex.
1481 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1482 `bibtex-entry-field-alist' is now an obsolete alias for
1483 `bibtex-BibTeX-entry-alist'.
1485 *** New command `bibtex-search-entries', bound to C-c C-a.
1487 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1489 *** New variable `bibtex-search-entry-globally'.
1493 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1495 *** The default browser used by the package is now the "xdg-open" program,
1496 on platforms that support it. This calls your desktop's preferred browser.
1498 ** Calendar, Diary, and Appt
1500 *** Diary entries can contain non-printing "comments".
1501 See the variable `diary-comment-start'.
1503 *** Appointments can specify their individual warning times.
1504 See the variable `appt-warning-time-regexp'.
1506 *** The function specified by `appt-disp-window-function' may be passed
1507 lists of arguments if multiple appointments are due at similar times.
1508 If you are using a custom function for this, you should update it.
1510 *** New function `diary-hebrew-birthday'.
1512 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1513 may no longer be nil, but must all be strings.
1515 *** The obsolete (since Emacs 22.1) method of enabling the appt
1516 package by adding `appt-make-list' to `diary-hook' has been removed.
1517 Use `appt-activate' instead.
1519 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1520 appt-issue-message (use the function appt-activate)
1521 appt-visible/appt-msg-window (use the variable appt-display-format)
1523 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1524 view-diary-entries, list-diary-entries, show-all-diary-entries
1528 *** New feature to "guess" the style in an existing buffer.
1529 The main entry point is M-x c-guess.
1531 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1533 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1534 Thus C-M-a will, by default, go to the beginning of the immediate function,
1537 *** "Macros with semicolons" can be registered for correct indentation.
1538 Where such a macro ends a line (no semicolon) the next statement is no longer
1539 parsed as a statement continuation.
1541 ** Comint and modes derived from it use the standard completion code.
1545 *** Compilation mode can be used without Font Lock mode.
1546 `compilation-parse-errors-function' is now obsolete.
1548 *** New variable `compilation-filter-start', which is bound while
1549 `compilation-filter-hook' runs. It records the start position of the
1550 text inserted by `compilation-filter'.
1552 *** `compilation-error-screen-columns' and `compilation-first-column'
1553 are obeyed in the editing buffer. So programming language modes can
1554 set them, whereas previously only the value in the *Compilation*
1559 *** Customize buffers now contain a search field.
1560 The search is performed using `customize-apropos'.
1561 To turn off the search field, set `custom-search-field' to nil.
1563 *** Options in customize group buffers start out hidden if not customized.
1564 Use the arrow to the left of the option name to toggle visibility.
1566 *** custom-buffer-sort-alphabetically now defaults to t.
1568 *** The color widget now has a "Choose" button, which allows you to
1569 choose a color via `list-colors-display'.
1573 *** It is now possible to access buses other than the default system
1576 *** The `dbus-register-method' and `dbus-register-property' functions
1577 optionally do not register names.
1579 *** The new function `dbus-register-service' registers a known service
1580 name on a D-Bus without also registering a property or a method.
1584 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1585 if called with a prefix argument, read a file name from the minibuffer
1586 instead of using the current buffer.
1588 *** The "dired local variables" feature of Dired-x is obsolete.
1589 The standard directory local variables feature replaces it.
1593 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1594 controlling attempts to autojoin a channel.
1596 *** New variable `erc-coding-system-precedence': If we use `undecided'
1597 as the server coding system, this variable will then be consulted.
1598 The default is to decode strings that can be decoded as utf-8 as
1599 utf-8, and do the normal `undecided' decoding for the rest.
1603 *** The default value of `eshell-directory-name' has changed
1604 to be an "eshell" directory in `user-emacs-directory'.
1605 The old "~/.eshell/" directory is still used if it exists, though.
1609 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1610 It now supports multithread non-stop debugging and simultaneous
1611 debugging of several threads.
1615 *** RET (`image-toggle-animation') toggles animation, if applicable.
1616 Animation plays once, unless the option `image-animate-loop' is non-nil.
1620 *** New command M-x info-display-manual displays a named Info manual.
1621 If that manual is already visited in some Info buffer, it displays
1622 that buffer. (This is handy if you have many manuals in many *info*
1623 buffers, and don't remember the name of the buffer visiting the manual
1624 you want to consult.) Otherwise, it loads and displays the manual.
1626 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1627 This is for compatibility with the stand-alone Info reader program,
1628 and also because `Info-edit' is a rarely used command that is disabled
1631 ** Mail mode changes (not Message mode)
1633 *** New command M-x mail-add-attachment for adding MIME attachments
1635 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1636 (Its name is misleading, since it has nothing to do with MIME
1637 attachments.) The old name is now an obsolete alias to the new name.
1639 ** MH-E has been updated to MH-E version 8.3.1.
1640 See MH-E-NEWS for details.
1642 ** Modula-2 mode provides auto-indentation.
1644 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1646 ** nXML mode no longer binds C-RET to `nxml-complete'.
1647 Completion is now performed via `completion-at-point', bound to C-M-i
1648 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1649 default), this performs tag completion.
1651 ** Org mode has been updated to version 7.8.09.
1652 See ORG-NEWS for details.
1654 ** Prolog mode has been completely revamped, with lots of additional
1655 functionality such as more intelligent indentation, electricity,
1656 support for more variants, including Mercury, and a lot more.
1660 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1661 in the Rmail incoming message.
1663 *** The variable `rmail-message-filter' no longer has any effect.
1664 This change was made in Emacs 23.1 but was not advertised at the time.
1665 Try using `rmail-show-message-hook' instead.
1669 *** M-x shell prompts for the shell path name if the default directory
1670 is a remote file name and neither the environment variable $ESHELL nor
1671 the variable `explicit-shell-file-name' is set.
1673 *** TAB is now bound to the standard `completion-at-point' command,
1674 which now implements the pcomplete rules for shell command completion.
1678 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1679 if the mail server supports them. This uses either built-in GnuTLS
1680 support, or the starttls.el library. Customize `smtpmail-stream-type'
1683 *** The variable `smtpmail-auth-credentials' has been removed.
1684 By default, the information is now stored in the file ~/.authinfo.
1685 This was the default value of smtpmail-auth-credentials. If you had
1686 customized smtpmail-auth-credentials to a list of user names and
1687 passwords, those settings are not used. During your first connection
1688 to the smtp server, Emacs will prompt for the user name and password,
1689 and offer to save them to ~/.authinfo. Or you can manually copy the
1690 credentials to ~/.authinfo. For example, if you had
1692 (setq smtpmail-auth-credentials
1693 '(("mail.example.org" 25 "jim" "s!cret")))
1695 then the equivalent line in ~/.authinfo would be
1697 machine mail.example.org port 25 login jim password s!cret
1699 See the auth-source manual for more information, e.g. on encrypting
1700 the credentials file.
1702 *** The variable `smtpmail-starttls-credentials' has been removed.
1703 If you had that set, you need to put
1705 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1707 in your ~/.authinfo file instead.
1709 *** SMTPmail defaults to using the address in the From: header as the
1710 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1711 to the address you wish to use instead.
1715 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1716 and `sql-oracle-scan-on'.
1718 *** New options controlling prompting for login parameters.
1719 Each supported product has a custom variable `sql-*-login-params',
1720 which is a list of the parameters to be prompted for before a
1721 connection is established.
1723 *** The command `sql-product-interactive' now takes a prefix argument,
1724 which causes it to prompt for an SQL product.
1726 *** Product-specific SQL interactive commands now take prefix arguments.
1727 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1728 given a prefix argument, prompt for a name for the SQL interactive
1729 buffer. This reduces the need for calling `sql-rename-buffer'.
1731 *** SQL interactive modes suppress command continuation prompts, and
1732 replace tabs with spaces. The first change impacts multiple line SQL
1733 statements entered with C-j between each line, statements yanked into
1734 the buffer and statements sent with `sql-send-*' functions. The
1735 second prevents the MySQL and Postgres interpreters from listing
1736 object name completions when sent text via `sql-send-*' functions.
1738 *** New command `sql-connect' starts a predefined SQLi session,
1739 using the login parameters from `sql-connection-alist'.
1741 *** New "Save Connection" menu item in SQLi buffers.
1742 This gathers the login params specified for the SQLi session, if it
1743 was not started by a connection, and saves them as a new connection.
1745 *** New commands for listing database objects and details:
1746 sql-list-all and sql-list-table.
1748 *** An API for manipulating SQL product definitions has been added.
1752 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1756 *** New inline access method "ksu" (kerberized su).
1758 *** The following access methods are discontinued: "ssh1_old",
1759 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1761 *** The user option `remote-file-name-inhibit-cache' controls whether
1762 remote file attributes are cached for better performance.
1764 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1765 default value to "".
1767 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1768 for remote machines which support SELinux.
1770 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1771 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1772 the degree of parallelism.
1774 ** VC and related modes
1776 *** Support for pulling on distributed version control systems.
1777 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1778 supported (currently with Bzr, Git, and Mercurial), to update the
1779 current branch and working tree. A prefix argument means to prompt
1780 the user for specifics, e.g. a pull location.
1782 *** `vc-update' is now an alias for `vc-pull'.
1784 *** Support for merging on distributed version control systems.
1785 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1786 is supported (currently with Bzr, Git, and Mercurial), to merge
1787 changes from another branch into the current one. It prompts for
1788 specifics, e.g. a merge source.
1790 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1791 shows a diff while querying the user. It defaults to t.
1793 *** Log entries in some Log View buffers can be toggled to display a
1794 longer description by typing RET (log-view-toggle-entry-display).
1795 This is currently supported for Bzr, Git, and Mercurial (to support
1796 another backend, define a `log-view-expanded-log-entry-function').
1797 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1798 use this to display the full log entry for the revision at point.
1800 *** New command `vc-ediff' allows visual comparison of two revisions
1801 of a file similar to `vc-diff', but using ediff backend.
1803 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1804 this was not advertised at the time.
1806 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1807 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1808 this was not advertised at the time.
1814 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1816 *** partial-completion-mode (complete.el) is obsolete.
1817 You can get a comparable behavior with:
1818 (setq completion-styles '(partial-completion initials))
1819 (setq completion-pcm-complete-word-inserts-delimiters t)
1821 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1823 *** pgg is obsolete (use EasyPG instead).
1825 *** sregex.el is obsolete, since rx.el is a strict superset.
1827 *** s-region.el and pc-select.el are obsolete.
1828 They are superseded by shift-select-mode, enabled by default since 23.1.
1830 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1834 *** The Landmark game is now invoked with `landmark', not `lm'.
1835 Its functions and variables have been similarly renamed.
1837 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1838 (This interfered with cua-mode.)
1840 *** f90.el has some support for Fortran 2008 syntax.
1842 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1844 *** New command `nato-region' converts text to NATO phonetic alphabet.
1847 * New Modes and Packages in Emacs 24.1
1849 ** Occur Edit mode applies edits made in *Occur* buffers to the
1850 original buffers. It is bound to "e" in Occur mode.
1852 ** New global minor mode electric-pair-mode.
1853 When enabled, typing an open parenthesis automatically inserts the
1854 matching closing one.
1856 ** New global minor mode electric-indent-mode.
1857 When enabled, typing certain characters triggers reindentation.
1858 Major modes wishing to use this can set electric-indent-chars or
1859 electric-indent-functions.
1861 ** New global minor mode electric-layout-mode.
1862 When enabled, typing certain characters automatically inserts newlines.
1863 Major modes wishing to use this can set electric-layout-rules.
1865 ** tabulated-list.el provides a generic major mode for tabulated data,
1866 from which other modes can be derived.
1868 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1870 ** secrets.el is an implementation of the Secret Service API, an
1871 interface to password managers like GNOME Keyring or KDE Wallet. The
1872 Secret Service API requires D-Bus for communication. The command
1873 `secrets-show-secrets' offers a buffer with a visualization of the
1876 ** notifications.el provides an implementation of the Desktop
1877 Notifications API. It requires D-Bus for communication.
1879 ** soap-client.el supports access to SOAP web services from Emacs.
1880 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1882 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1884 ** New emacs-lock.el package.
1885 The previous version has been moved to obsolete/old-emacs-lock.el.
1886 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1887 against exiting Emacs and killing the buffer can be set separately.
1888 The mechanism for automatically turning off protection for buffers
1889 with dead inferior processes has been generalized.
1892 * Incompatible Lisp Changes in Emacs 24.1
1894 ** Passing a nil argument to a minor mode function call now ENABLES
1895 the minor mode unconditionally. This is so that you can write e.g.
1897 (add-hook 'text-mode-hook 'foo-mode)
1899 to enable foo-mode in Text mode buffers, removing the need for
1900 `turn-on-foo-mode' style functions. This affects all mode commands
1901 defined by `define-minor-mode'. If called interactively, the mode
1902 command still toggles the minor mode.
1904 ** The return value of `backup-buffer' has changed.
1905 It is now a list of three elements, where the second element is a list
1906 describing the original file's SELinux context. If Emacs or the
1907 system lacks SELinux support, the context list is (nil nil nil nil).
1908 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1910 ** `char-direction-table' and the `char-direction' function were deleted.
1911 They were buggy and inferior to the new support of bidirectional
1912 editing introduced in Emacs 24. If you need the bidirectional
1913 properties of a character, use `get-char-code-property' with the last
1914 argument `bidi-class'.
1916 ** `copy-directory' now copies the source directory as a subdirectory
1917 of the target directory, if the latter is an existing directory. The
1918 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1919 the contents directly into a pre-existing target directory.
1921 ** For mouse click input events in the text area, the Y pixel
1922 coordinate in the POSITION list now counts from the top of the text
1923 area, excluding any header line. Previously, it counted from the top
1926 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1927 been further reduced. Now a backquote not followed by a space is
1928 always treated as a "new-style" backquote. Please remove all
1929 "old-style" backquotes from your code. If your code uses backquotes
1930 as documented in the Elisp manual, and compiles without warning, then
1931 you have nothing to do in this regard. Code not following the
1932 appropriate conventions may fail to compile.
1934 The most common cause of trouble seems to be an old-style backquote
1935 followed by a newline. Another cause of trouble is vector notation
1936 for key sequence notation: instead of [(control ,)] and [(control ')],
1937 you should write [(control ?,)] and [(control ?')], which will work in
1940 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1941 was not advertised at the time. The function `custom-initialize-delay'
1942 replaced all known uses.
1944 ** `view-buffer' now treats special mode-class in the same way that
1945 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1946 major mode is special).
1948 ** Menu and tool bar changes
1950 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1951 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1952 With these alist entries omitted, `make-frame' checks the value of the
1953 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1954 a menu-bar or tool-bar, respectively. If the alist entries are added,
1955 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1957 *** The menu bar bindings's caches are not used any more.
1958 Use (where-is-internal <def> nil t) instead.
1960 ** Regions created by mouse dragging are now normal active regions,
1961 similar to those created by shift-selection (see Selection changes
1962 above). In previous Emacs versions, these regions were delineated by
1963 `mouse-drag-overlay'; that variable has been removed.
1965 ** The fourth argument of `filter-buffer-substring' has been removed.
1966 If you want to remove text properties from the final result, simply
1967 pass the result through substring-no-properties.
1969 ** cl.el no longer provides `cl-19'.
1971 ** The following obsolete functions and aliases have been removed
1972 (the appropriate new function is given in parentheses; "not needed"
1973 means you can just remove all calls to the function in question):
1975 *** `comint-kill-output' (`comint-delete-output')
1976 *** `decompose-composite-char' (`char-to-string')
1977 *** `outline-visible' (`outline-invisible-p')
1978 *** `internal-find-face' (`facep')
1979 *** `internal-get-face' (`facep and check-face')
1980 *** `frame-update-faces' (not needed)
1981 *** `frame-update-face-colors' (`frame-set-background-mode')
1982 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1983 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1984 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1985 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1986 *** `x-make-font-unbold' (`make-face-unbold')
1987 *** `x-make-font-unitalic' (`make-face-unitalic')
1988 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1989 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1990 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1991 *** `char-bytes' (== 1)
1992 *** `isearch-return-char' (`isearch-printing-char')
1993 *** `make-local-hook' (not needed)
1994 *** `set-screen-height' (`set-frame-height')
1995 *** `set-screen-width' (`set-frame-width')
1997 ** The following obsolete variables and varaliases have been removed
1998 (the appropriate new variable is given in parentheses):
2000 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2001 *** `vc-header-alist' (`vc-BACKEND-header')
2002 *** `directory-sep-char' (== ?/)
2003 *** `font-lock-defaults-alist' (`font-lock-defaults')
2004 *** `e' (`float-e').
2006 ** The following obsolete files were removed:
2007 sc.el, x-menu.el, rnews.el, rnewspost.el
2009 ** The format of the finder-inf.el file has changed, since the Finder
2010 mechanism is now based on the package system. The variable
2011 `finder-package-info' is replaced by `package--builtins' and
2012 `finder-keywords-hash'.
2014 ** When generating autoloads, `update-directory-autoloads' no longer
2015 assumes every inspected file is in your `load-path'. It instead
2016 generates relative names according to the current `load-path'.
2019 * Lisp changes in Emacs 24.1
2021 ** Code can now use lexical scoping by default instead of dynamic scoping.
2022 The `lexical-binding' variable enables lexical scoping for local
2023 variables. It is typically set via a file-local variable in the first
2024 line of the file, in which case it applies to all the code in that
2027 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2028 binding instead of the old dynamic binding mode.
2030 *** Lexically scoped interpreted functions are represented with a new form
2031 of function value which looks like (closure ENV ARGS &rest BODY).
2033 *** New macro `letrec' to define recursive local functions.
2035 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2036 So do `defcustom' and other forms that call `defvar' as a subroutine.
2038 *** New function `special-variable-p' to check whether a variable is
2039 declared as dynamically bound.
2041 *** The form ((lambda ...) ...) is deprecated.
2043 ** An Emacs Lisp testing tool is now included.
2044 Emacs Lisp developers can use this tool to write automated tests for
2045 their code. See the ERT info manual for details.
2047 ** Changes for bidirectional display and editing
2049 *** New function `current-bidi-paragraph-direction'.
2050 This returns the base direction of the paragraph at point.
2052 *** New function `bidi-string-mark-left-to-right'.
2053 Given a string containing characters from right-to-left scripts, this
2054 function returns another string which can be safely inserted into a
2055 buffer, such that any following text will be always displayed to the
2056 right of that string. (This works by appending an invisible Unicode
2057 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2059 This is useful when the buffer has overall left-to-right paragraph
2060 direction and you need to insert a string whose contents are not known
2061 in advance, without disrupting the layout of the line.
2065 *** Window tree functions are accessible in Elisp.
2066 Functions are provided to return the parent, siblings or child windows
2067 of any window including internal windows (windows not associated with a
2068 buffer) in the window tree.
2070 **** New function `window-valid-p' gives non-nil for live and internal
2073 **** Window manipulation can deal with internal windows.
2074 Many window handling functions like `split-window', `delete-window', or
2075 `delete-other-windows' as well as the window resizing functions can now
2076 act on any window including internal ones.
2078 *** window-total-height/-width vs window-body-height/-width.
2079 The function `window-height' has been renamed to `window-total-height'
2080 and `window-width' has been renamed to `window-body-width'. The old
2081 names are provided as aliases. Two new functions `window-total-width'
2082 and `window-body-height' are provided.
2084 *** Window parameters specific to window handling functions.
2085 For each window you can specify a parameter to override the default
2086 behavior of a number of functions like `split-window', `delete-window'
2087 and `delete-other-windows'. The variable `ignore-window-parameters'
2088 allows to ignore processing such parameters.
2090 *** New semantics of third argument of `split-window'.
2091 The third argument of `split-window' has been renamed to SIDE and can be
2092 set to any of the values 'below, 'right, 'above, or 'left to make the
2093 new window appear on the corresponding side of the window that shall be
2094 split. Any other value of SIDE will cause `split-window' to split the
2095 window into two side-by-side windows as before.
2097 *** Window resizing functions.
2098 A new standard function for resizing windows called `window-resize' has
2099 been introduced. This and all other functions for resizing windows no
2100 longer delete any windows when they become too small.
2102 *** Deleting the selected window now selects the most recently selected
2103 live window on that frame instead.
2105 *** `adjust-window-trailing-edge' adjustments.
2106 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2107 is able to resize other windows if a window adjacent to the trailing
2108 edge cannot be shrunk any more. This makes its behavior more similar to
2109 that of Emacs 21 without compromising, however, its inability to delete
2110 windows which was introduced in Emacs 22.
2112 *** Window-local buffer lists.
2113 Windows now have local buffer lists. This means that removing a buffer
2114 from display in a window will preferably show the buffer previously
2115 shown in that window with its previous window-start and window-point
2116 positions. This also means that the same buffer may be automatically
2117 shown twice even if it already appears in another window.
2119 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2120 which if non-nil requires the buffer to be displayed in the currently
2121 selected window, signaling an error otherwise. If nil, another window
2122 can be used, e.g. if the selected one is strongly dedicated.
2124 *** `split-window-vertically' and `split-window-horizontally' renamed
2125 to `split-window-below' and `split-window-right' respectively.
2126 The old names are kept as aliases.
2130 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2131 named ACTION, and takes a display action of the same form as
2132 `display-buffer-base-action' (see Changes, above). A non-nil,
2133 non-list value is treated specially, as the old meaning.
2135 **** New variable `display-buffer-overriding-action'.
2137 **** The procedure of `display-buffer' etc. to choose a window is
2138 determined by combining `display-buffer-overriding-action',
2139 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2140 and `display-buffer-fallback-action'. The second and fourth of these
2141 are user-customizable variables.
2143 See the docstring of `display-buffer' for details.
2145 *** New functions `window-state-get' and `window-state-put'.
2146 These functions allow to save and restore the state of an arbitrary
2147 frame or window as an Elisp object.
2151 *** New variable `completion-extra-properties' used to specify extra
2152 properties of the current completion:
2153 - :annotate-function, same as the old completion-annotate-function.
2154 - :exit-function, function to call after completion took place.
2156 *** Functions on `completion-at-point-functions' can return any of the
2157 properties valid for `completion-extra-properties'.
2159 *** `completion-annotate-function' is obsolete.
2161 *** New `metadata' method for completion tables. The metadata thus returned
2162 can specify various details of the data returned by `all-completions':
2163 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2164 used to select a style in completion-category-overrides.
2165 - `annotation-function' to add annotations in *Completions*.
2166 - `display-sort-function' to specify how to sort entries in *Completions*.
2167 - `cycle-sort-function' to specify how to sort entries when cycling.
2169 *** `minibuffer-local-filename-must-match-map' is not used any more.
2170 Instead, the bindings in `minibuffer-local-filename-completion-map'
2171 are combined with `minibuffer-local-must-match-map'.
2173 *** New variable `completing-read-function' allows overriding the
2174 behavior of `completing-read'.
2176 ** `glyphless-char-display' can now distinguish between graphical and
2177 text terminal display, via a char-table entry that is a cons cell.
2179 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2180 Instead, the offending function is removed.
2184 *** New function `run-hook-wrapped' for running an abnormal hook by
2185 passing the hook functions as arguments to a "wrapping" function.
2186 Like `run-hook-with-args-until-success', it stops at the first
2187 non-nil return value.
2189 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2190 set of "wrapping" filters, similar to around advice.
2191 (A version of this macro was actually added in Emacs 23.2 but was not
2192 advertised at the time.)
2196 *** New macro `condition-case-unless-debug' (this was actually added in
2197 Emacs 23.1 as condition-case-no-debug, but not advertised)
2199 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2201 *** Variable `stack-trace-on-error' removed.
2203 *** The debugger can now "continue" from an error, which means it will
2204 jump to the error handler as if the debugger had not been invoked
2205 instead of jumping all the way to the top-level.
2207 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2208 This can be useful when `inhibit-quit' is set.
2210 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2211 named Emacs server instances.
2213 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2214 to redirect STDOUT to a file.
2216 ** The function `format-time-string' now supports the %N directive,
2217 for higher-resolution time stamps.
2219 ** New input reading functions
2221 *** New function `read-char-choice' reads a restricted set of
2222 characters, discarding any inputs not inside the set.
2224 *** The command `read-color' now requires a match for a color name
2225 or RGB triplet, instead of signaling an error if the user provides
2228 **** `facemenu-read-color' is now an alias for `read-color'.
2230 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2231 The variable is now used to load all kind of supported dynamic libraries,
2232 not just image libraries. The previous name is still available as an
2235 ** Syntax parsing changes
2237 *** New variable `syntax-propertize-function'.
2238 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2239 This allows syntax-table properties to be set independently from font-lock:
2240 just call syntax-propertize to make sure the text is propertized.
2241 Together with this new variable come a new hook
2242 syntax-propertize-extend-region-functions, as well as two helper functions:
2243 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2244 as-is; and syntax-propertize-rules which provides a new way to specify
2247 *** Syntax tables support a new "comment style c" additionally to style b.
2249 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2251 ** frame-local variables cannot be let-bound any more.
2253 ** Major and minor mode changes
2255 *** `set-auto-mode' now respects mode: local variables at the end of files,
2256 as well as those in the -*- line.
2258 *** `prog-mode' is a new major mode from which programming modes
2261 **** `prog-mode-hook' can be used to enable features for programming
2262 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2263 on-the-fly spell checking for comments and strings.
2265 *** New hook `change-major-mode-after-body-hook', run by
2266 `run-mode-hooks' just before any other mode hooks.
2268 *** Enabled globalized minor modes can be disabled in specific major modes.
2269 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2270 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2272 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2274 ** File-handling changes
2276 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2277 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2278 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2279 argument is supplied (see Trash changes, above).
2281 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2283 ** Tool-bars can display separators.
2284 Tool-bar separators are handled like menu separators in menu-bar maps,
2285 i.e. via menu entries of the form `(menu-item "--")'.
2289 *** Animated images support (currently animated gifs only).
2291 **** `image-animated-p' returns non-nil if an image can be animated.
2293 **** `image-animate' animates a supplied image spec.
2295 **** `image-animate-timer' returns the timer object for an image that
2298 *** `image-extension-data' has been renamed to `image-metadata'.
2299 The old name is an obsolete alias to the new one.
2301 *** Image mode can view any image type that ImageMagick supports.
2302 This requires Emacs to be built with ImageMagick support.
2304 **** New function `imagemagick-types', defined if ImageMagick support
2305 is enabled, returns a list of image file extensions that your
2306 ImageMagick installation supports.
2308 **** New function `imagemagick-register-types' enables ImageMagick
2309 image types in Image mode and in `create-image' and other helper
2312 **** New option `imagemagick-types-inhibit' excludes certain
2313 ImageMagick image types from `imagemagick-register-types'.
2315 **** With ImageMagick support, there are extra Image mode commands to
2316 resize and rotate images: `image-transform-fit-to-height',
2317 `image-transform-fit-to-width', `image-transform-set-rotation', and
2318 `image-transform-set-scale'.
2320 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2321 passes it to the mail user agent function. This argument specifies an
2322 action for returning to the caller after finishing with the mail. For
2323 example, this is used by Rmail to optionally delete a mail window.
2325 ** XML and HTML parsing
2326 If Emacs is compiled with libxml2 support, there are two new
2327 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2328 and `libxml-parse-xml-region' (which parses XML). Both return an
2329 Emacs Lisp parse tree.
2331 ** Networking and encryption changes
2333 *** `open-network-stream' can now be used to open an encrypted stream.
2334 It now accepts an optional `:type' parameter for initiating a TLS
2335 connection, directly or via STARTTLS. To do STARTTLS, additional
2336 parameters (`:end-of-command', `:success', `:capabilities-command')
2337 must also be supplied.
2339 *** New library gnutls.el.
2340 The new function `gnutls-available-p' returns non-nil if Emacs is
2341 built with GnuTLS support. The main entry points are
2342 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2343 these functions through `open-network-stream', because that can
2344 upgrade connections through STARTTLS opportunistically or use plain
2345 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2348 *** New primitive `secure-hash' that supports many secure hash algorithms:
2349 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2350 sha1.el has been removed. The `sha1' feature is provided by default.
2354 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2356 ** Progress reporters can now "spin".
2357 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2358 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2359 time you call `progress-reporter-update' on that progress reporter,
2360 with a nil or omitted VALUE argument, the reporter message is
2361 displayed with a "spinning bar".
2363 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2364 being reverted, even if the buffer has a local `revert-buffer-function'.
2366 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2367 If delayed-warnings-list is non-nil, the command loop calls
2368 `delayed-warnings-hook' after `post-command-hook'. At present, this
2369 is only used by Emacs on some platforms to display warnings during
2370 startup, which might otherwise not be noticed. This uses the
2371 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2373 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2375 ** New function `make-composed-keymap' that constructs a new keymap
2376 from multiple input maps. You can use this to make a keymap that
2377 inherits from multiple maps, eg:
2378 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2380 ** New function `string-prefix-p'.
2381 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2383 ** New reader macro ## that stands for the empty symbol.
2384 This means that the empty symbol can now be read back. Also, #: by itself
2385 (when not immediately followed by a possible symbol character) stands for
2386 an empty uninterned symbol.
2388 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2390 ** The following functions and variables are obsolete:
2392 *** `tooltip-use-echo-area' is obsolete.
2393 Rather than setting this to t, disable Tooltip mode instead.
2395 *** buffer-substring-filters is obsolete.
2396 Use `filter-buffer-substring-functions' instead.
2398 *** `byte-compile-disable-print-circle' is obsolete.
2400 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2401 Use `post-command-hook' instead.
2403 *** `font-lock-maximum-size' is obsolete.
2406 * Changes in Emacs 24.1 on non-free operating systems
2408 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2409 and also when HOME is set to C:\ by default.
2411 ** New configure.bat options
2413 *** --enable-checking builds Emacs with extra runtime checks.
2415 *** --distfiles specifies files to be included in binary distribution.
2417 *** --without-gnutls disables automatic GnuTLS detection.
2419 *** --lib for general library linkage, works with the USER_LIBS build variable.
2421 ** New make target `dist' to create binary distribution for MS Windows.
2423 ** The Lisp function `w32-default-color-map' is now obsolete.
2424 (It is only used internally in the Emacs C code.)
2426 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2427 reappear on mouse-over. (Requires OS X 10.6 or later.)
2429 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2430 other platforms, rather than inserting its contents into the buffer.
2433 ----------------------------------------------------------------------
2434 This file is part of GNU Emacs.
2436 GNU Emacs is free software: you can redistribute it and/or modify
2437 it under the terms of the GNU General Public License as published by
2438 the Free Software Foundation, either version 3 of the License, or
2439 (at your option) any later version.
2441 GNU Emacs is distributed in the hope that it will be useful,
2442 but WITHOUT ANY WARRANTY; without even the implied warranty of
2443 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2444 GNU General Public License for more details.
2446 You should have received a copy of the GNU General Public License
2447 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2452 paragraph-separate: "[
\f]*$"