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 24.4
25 * Startup Changes in Emacs 24.4
26 * Changes in Emacs 24.4
27 * Editing Changes in Emacs 24.4
28 * Changes in Specialized Modes and Packages in Emacs 24.4
29 * New Modes and Packages in Emacs 24.4
30 * Incompatible Lisp Changes in Emacs 24.4
32 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
33 VAR was bound to nil which was not tremendously useful and just lead to
34 spurious warnings about an unused var.
36 * Lisp changes in Emacs 24.4
38 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
39 text-property on the first char.
41 ** The `defalias-fset-function' property lets you catch calls to defalias
42 and redirect them to your own function instead of `fset'.
44 * Changes in Emacs 24.4 on non-free operating systems
47 * Installation Changes in Emacs 24.3
50 ** The default toolkit has been changed to Gtk+ version 3.
51 If you don't pass --with-x-toolkit to configure or if you pass
52 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
53 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
54 You can explicitly require a specific version by passing
55 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
58 ** New configure option '--without-all' to disable additional features.
59 This disables most of the features that are normally enabled by default.
62 ** New configure option '--enable-link-time-optimization' to utilize
63 an appropriate feature provided by GCC since version 4.5.0.
66 ** New configure option '--enable-gcc-warnings', intended for developers.
67 If building with GCC, this enables compile-time checks that warn about
68 possibly-questionable C code. On a recent GNU system there should be
69 no warnings; on older and on non-GNU systems the generated warnings
73 ** The configure option '--enable-use-lisp-union-type' has been
74 renamed to '--enable-check-lisp-object-type', as the resulting
75 Lisp_Object type no longer uses a union to implement the compile time
76 check that this option enables.
79 ** The configure option '--disable-maintainer-mode' has been removed,
80 as it was confusingly-named and rarely useful.
83 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
84 overwriting "emacs" in the installation bin/ directory with a link
88 ** The configure options `--program-prefix', `--program-suffix', and
89 `--program-transform-name' apply to more than just the installed
90 binaries. Now they also affect the man pages, icons, and the
91 etc/emacs.desktop file; but not the info pages, since this would break
92 links between the various manuals.
95 ** Emacs uses libtinfo in preference to libncurses, if available.
98 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
99 /usr/pkg/lib to the linker search path. You must add them yourself if
103 ** The standalone scripts rcs-checkin and vcdiff have been removed
104 (from the bin and libexec directories, respectively). The former is
105 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
108 * Startup Changes in Emacs 24.3
111 ** Emacs no longer searches for `leim-list.el' files beneath the standard
112 lisp/ directory. There should not be any there anyway. If you have
113 been adding them there, put them somewhere else, eg site-lisp.
116 ** The `--no-site-lisp' command line option now works for Nextstep builds.
119 * Changes in Emacs 24.3
122 ** Most y-or-n prompts now allow you to scroll the selected window.
123 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
124 respectively, without exiting from the prompt.
128 *** New option `mode-line-default-help-echo' specifies the help text
129 (shown in a tooltip or in the echo area) for any part of the mode line
130 that does not have its own specialized help text.
132 *** You can now click mouse-3 in the coding system indicator to invoke
133 `set-buffer-file-coding-system'.
138 *** `C-h f' (describe-function) can now perform autoloading.
139 When this command is called for an autoloaded function whose docstring
140 contains a key substitution construct, that function's library is
141 automatically loaded, so that the documentation can be shown
142 correctly. To disable this, set `help-enable-auto-load' to nil.
145 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
146 even after their associated libraries have been loaded (and the
147 autoloads have been redefined as functions).
149 ** Minibuffer changes
151 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
152 next and previous path separator, respectively.
154 *** minibuffer-electric-default-mode can rewrite (default ...) to [...].
155 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
157 ** ImageMagick support, if available, is automatically enabled.
158 It is no longer necessary to call `imagemagick-register-types'
159 explicitly to install ImageMagick image types; that function is called
160 automatically at startup, or when customizing a relevant imagemagick-
163 *** Setting `imagemagick-types-inhibit' to t now disables the use of
164 ImageMagick to view images. You must call imagemagick-register-types
165 afterwards if you do not use customize to change this.
167 *** The new variable `imagemagick-enabled-types' also affects which
168 ImageMagick types are treated as images. The function
169 `imagemagick-filter-types' returns the list of types that will be
172 *** Images displayed via ImageMagick now support transparency and the
173 :background image spec property.
175 ** Server and client changes
177 *** emacsclient now obeys string values for `initial-buffer-choice',
178 if it is told to open a new frame without specifying any file to visit
179 or expression to evaluate.
181 *** New option `server-auth-key' specifies a shared server key.
184 ** In the Package Menu, newly-available packages are listed as "new",
185 and sorted above the other "available" packages by default.
188 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
189 This minor mode replaces `toggle-read-only', which is now obsolete.
191 ** Emacs now generates backtraces on fatal errors.
192 On encountering a fatal error, Emacs now outputs a textual description
193 of the fatal signal, and a short backtrace on platforms like glibc
194 that support backtraces.
197 ** If your Emacs was built from a bzr checkout, the new variable
198 `emacs-bzr-version' contains information about the bzr revision used.
201 ** New variable `create-lockfiles' specifies usage of lockfiles.
202 It defaults to t. Changing it to nil inhibits the creation of lock
203 files (use this with caution).
206 ** Using "unibyte: t" in Lisp source files is obsolete.
207 Use "coding: raw-text" instead.
210 ** Setting `enable-remote-dir-locals' to non-nil allows directory
211 local variables on remote hosts.
214 ** The entry for PCL-CVS has been removed from the Tools menu.
215 The PCL-CVS commands are still available via the keyboard.
217 ** Internationalization changes
219 *** New language environment: Persian.
221 *** New input method `vietnamese-vni'.
223 ** Nextstep (GNUstep / Mac OS X) port changes
225 *** Fullscreen and frame parameter fullscreen is supported.
227 *** A file dialog is used for open/save operations initiated from the
231 * Editing Changes in Emacs 24.3
233 ** Navigation command changes
235 *** New binding `M-g c' for `goto-char'.
237 *** New binding `M-g TAB' for `move-to-column'.
239 *** `M-g TAB' (`move-to-column') prompts for a column number if called
240 interactively with no prefix arg. Previously, it moved to column 1.
242 ** Search and Replace changes
244 *** Non-regexp Isearch now performs "lax" space matching.
245 Each sequence of spaces in the supplied search string may match any
246 sequence of one or more whitespace characters, as specified by the
247 variable `search-whitespace-regexp'. (This variable is also used by a
248 similar existing feature for regexp Isearch).
250 *** New Isearch command `M-s SPC' toggles lax space matching.
251 This applies to both ordinary and regexp Isearch.
253 *** New option `replace-lax-whitespace'.
254 If non-nil, `query-replace' uses flexible whitespace matching too.
257 *** Global `M-s _' starts a symbol (identifier) incremental search,
258 and `M-s _' in Isearch toggles symbol search mode.
259 `M-s c' in Isearch toggles search case-sensitivity.
262 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
263 `ucs-insert' is now an obsolete alias for `insert-char'.
266 ** The `z' key no longer has a binding in most special modes.
267 It used to be bound to `kill-this-buffer', but `z' is too easy to
271 ** New option `delete-trailing-lines' specifies whether
272 M-x delete-trailing-whitespace should delete trailing lines at the end
273 of the buffer. It defaults to t.
277 *** `C-x r +' is now overloaded to invoke `append-to-register.
279 *** New option `register-separator' specifies the register containing
280 the text to put between collected texts for use with M-x
281 append-to-register and M-x prepend-to-register.
284 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
287 ** New command `C-x r M-w' (copy-rectangle-as-kill).
288 It copies the region-rectangle as the last rectangle kill.
291 ** New option `yank-handled-properties' allows processing of text
292 properties on yanked text, in more ways that are more general than
293 just removing them, as done by `yank-excluded-properties'.
296 * Changes in Specialized Modes and Packages in Emacs 24.3
300 *** The faces used by Apropos are now directly customizable.
301 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
302 see the `apropos' Custom group for details.
304 *** The old options whose values specified faces to use were removed
305 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
308 This package has been rewritten to use Tabulated List mode.
310 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
311 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
316 *** You can customize the header text that appears above each calendar month.
317 See the variable `calendar-month-header'.
320 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
323 *** The calendars produced by cal-html include holidays.
324 Customize `cal-html-holidays' to change this.
329 *** CL's main entry is now (require 'cl-lib).
330 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
331 i.e. all its definitions have the "cl-" prefix (and internal definitions use
334 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
335 under the name `cl-foo' instead, with the exceptions of the few definitions
336 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
337 which have not been renamed to `cl-foo*' but just `cl-foo'.
339 The old `cl' is now deprecated and is mainly just a bunch of aliases that
340 provide the old non-prefixed names. Some exceptions are listed below.
343 *** `cl-flet' is not like `flet' (which is deprecated).
344 Instead it obeys the behavior of Common-Lisp's `flet'.
347 *** `cl-labels' is slightly different from `labels'.
348 The difference is that it relies on the `lexical-binding' machinery (as opposed
349 to the `lexical-let' machinery used previously) to capture definitions in
350 closures, so such closures will only work if `lexical-binding' is in use.
353 *** `cl-letf' is not exactly like `letf'.
354 The only difference is in details that relate to some deprecated usage
355 of `symbol-function' in place forms.
358 *** `progv' was rewritten to use the `let' machinery.
359 A side effect is that vars without corresponding value are bound to nil
360 rather than making them unbound.
362 *** The following methods of extending `setf' are obsolete.
363 Use gv.el instead (FIXME; details).
364 `define-setf-expander', `defsetf', `define-modify-macro'
368 *** New option `compilation-always-kill'.
372 *** `custom-reset-button-menu' now defaults to t.
374 *** Non-option variables are never matched in `customize-apropos' and
375 `customize-apropos-options' (i.e. the prefix argument does nothing for
380 *** `desktop-path' no longer includes the "." directory. Desktop
381 files are now located in ~/.emacs.d by default.
386 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
389 *** The D-Bus object manager interface is implemented.
392 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
393 if their value does not fit into Emacs's integer range.
396 *** The function `dbus-call-method' works non-blocking now, it can be
397 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
400 *** Signals can be sent also as unicast message.
403 *** The argument list of `dbus-register-signal' has been extended,
404 according to the new match rule types of D-Bus. See the manual for
408 *** `dbus-init-bus' supports private connections.
411 *** There is a new function `dbus-setenv'.
415 *** Changes are now highlighted using the same color scheme as in
416 modern VCSes. Deletions are displayed in red (new faces
417 `diff-refine-removed' and `smerge-refined-removed' and new definition
418 of `diff-removed'), insertions in green (new faces `diff-refine-added'
419 and `smerge-refined-added' and new definition of `diff-added').
421 *** The variable `diff-use-changed-face' defines whether to use the
422 face `diff-changed', or `diff-removed' and `diff-added' to highlight
423 changes in context diffs.
425 *** The new command `diff-remove-trailing-whitespace' fixes trailing
426 whitespace problems introduced by the diff.
430 *** `dired-do-async-shell-command' executes each file sequentially
431 if the command ends in `;' (when operating on multiple files).
432 Otherwise, it executes the command on each file in parallel.
434 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
435 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
438 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
439 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
440 mark/unmark/flag all files in the active region.
442 *** The minibuffer default for `=' (`dired-diff) has changed.
443 It is now the backup file for the file at point, if one exists.
444 In Transient Mark mode the default is the file at the active mark.
446 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
447 The global binding for `M-=', `count-words-region' is in effect.
450 ** Ediff now uses the same color scheme as Diff mode.
452 ** erc will look up server/channel names via auth-source and use the
453 channel keys found, if any.
455 ** Flymake uses fringe bitmaps to indicate errors and warnings.
456 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
457 `flymake-warning-bitmap'.
461 *** The obsolete variable `follow-mode-off-hook' has been removed.
463 *** Follow mode no longer works by using advice.
464 The option `follow-intercept-processes' has been removed.
468 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
469 specifying URL types which should be converted to remote file names at
470 the FFAP prompt. The default is now '("ftp").
473 `javascript-generic-mode' is now an obsolete alias for `js-mode'.
477 *** New `derived-mode' filter, bound to `/ M'.
478 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
480 ** Mouse Avoidance mode
482 *** New variable `mouse-avoidance-banish-position' specifies where the
483 `banish' mouse avoidance setting moves the mouse.
486 ** notifications.el supports now version 1.2 of the Notifications API.
487 The function `notifications-get-capabilities' returns the supported
490 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
491 closing brackets to be aligned with the line of the opening bracket.
493 ** In Proced mode, new command `proced-renice' renices marked processes.
497 A new version of python.el, which provides several new features, including:
498 per-buffer shells, better indentation, Python 3 support, and improved
499 shell-interaction compatible with iPython (and virtually any other
502 *** Some user options have been replaced/renamed:
503 Old defcustom: | New defcustom:
504 python-indent | python-indent-offset
505 python-guess-indent | python-indent-guess-indent-offset
506 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
507 python-use-skeletons | python-skeleton-autoinsert
509 *** Some user options have been removed:
511 **** `python-indent-string-contents': Strings are never indented.
513 **** `python-honour-comment-indentation':
514 Comments are never considered as indentation markers themselves.
516 **** `python-continuation-offset': Indentation is automatically
517 calculated in a pep8 compliant way depending on the context.
519 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
520 Have no direct mapping as the shell interaction is completely different.
522 **** `python-python-command', `python-jython-command':
523 Replaced by `python-shell-interpreter'.
525 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
526 `python-pdbtrack-minor-mode-string', `python-source-modes':
529 *** Some commands have been replaced:
530 Old command | New command
531 python-insert-class | python-skeleton-class
532 python-insert-def | python-skeleton-def
533 python-insert-for | python-skeleton-for
534 python-insert-if | python-skeleton-if
535 python-insert-try/except | python-skeleton-try
536 python-insert-try/finally | python-skeleton-try
537 python-insert-while | python-skeleton-while
538 python-find-function | python-nav-jump-to-defun
539 python-next-statement | python-nav-forward-sentence
540 python-previous-statement | python-nav-backward-sentence
541 python-send-buffer | python-shell-send-buffer
542 python-send-defun | python-shell-send-defun
543 python-send-region | python-shell-send-region
544 python-send-region-and-go | Emulate with python-shell-send-region and
545 python-shell-switch-to-shell
546 python-send-string | python-shell-send-string
547 python-switch-to-python | python-shell-switch-to-shell
548 python-describe-symbol | python-eldoc-at-point
550 ** reStructuredText mode
552 *** Rebind nearly all keys making room for more keys and complying
553 better to usage in other modes. Describe bindings with C-c C-h.
555 *** Major revision of indentation working very similar to other
556 modes. TAB is your friend.
558 *** Major revision of filling working fine with most of
559 reStructuredText syntax. Support auto-filling.
561 *** Major revision of comment handling.
563 *** Major revision of fontification working with `jit-lock-mode'.
565 *** Cover reStructuredText syntax more closely. Improve
566 the experience for Sphinx users.
568 *** `rst-insert-list' inserts new list or continues existing lists.
570 *** Extend correct and improve customization.
572 *** Negative prefix argument always works for `rst-adjust'.
574 *** Reset window configuration after displaying TOC.
576 *** Package version in `rst-version'.
578 *** Support `imenu' and `which-func'.
582 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
584 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
586 *** `sh-use-smie' lets you choose a new indentation and navigation code.
590 *** New option `async-shell-command-buffer' specifies what buffer to use
591 for a new asynchronous shell command when the default output buffer
592 `*Async Shell Command*' is already taken by another running command.
596 *** DB2 added `sql-db2-escape-newlines'
598 If non-nil, newlines sent to the command interpreter will be escaped
599 by a backslash. The default does not escape the newlines and assumes
600 that the sql statement will be terminated by a semicolon.
602 ** Tabulated List and packages derived from it
604 *** New command `tabulated-list-sort', bound to `S', sorts the column
605 at point, or the Nth column if a numeric prefix argument is given.
609 The variables `term-default-fg-color' and `term-default-bg-color' are
610 now deprecated in favor of the `term-face' face, that you can
611 customize. Also, it is now possible to customize how are displayed the
612 ANSI terminal colors and styles by customizing the corresponding
613 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
618 *** The syntax has been extended in order to allow ad-hoc proxy
619 definitions. See the manual for details.
621 *** Remote processes are now supported also on remote Windows host.
625 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
626 Previously, this slot stored semicolon-separated attribute-value pairs
627 appended to some imap URLs, but this is not compatible with RFC 3986.
628 So now the `filename' slot stores the entire path and query components
629 and the `attributes' slot is always nil.
631 *** New function `url-encode-url' for encoding a URI string.
632 The `url-retrieve' function now uses this to encode its URL argument,
633 in case that is not properly encoded.
638 *** The free software compiler GHDL is supported (and now the default).
640 *** Support for the VHDL-AMS packages has been added/updated.
642 *** Updated to the 2002 revision of the VHDL standard.
644 *** Accepts \r and \f as whitespace.
646 ** Which Function mode
648 *** `which-func-modes' now defaults to t, so Which Function mode, when
649 enabled, applies to all applicable major modes.
652 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
655 ** FIXME something happened to ses.el, 2012-04-17.
657 ** Hooks renamed to avoid obsolete "-hooks" suffix:
658 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
659 *** semantic-change-hooks -> semantic-change-functions
660 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
661 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
662 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
663 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
664 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
665 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
666 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
667 *** rcirc-activity-hooks -> rcirc-activity-functions
668 *** rcirc-print-hooks -> rcirc-print-functions
669 *** dbus-event-error-hooks -> dbus-event-error-functions
670 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
671 *** checkdoc-style-hooks -> checkdoc-style-functions
672 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
673 *** archive-extract-hooks -> archive-extract-hook
674 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
675 *** hfy-post-html-hooks -> hfy-post-html-hook
676 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
677 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
678 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
679 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
681 ** Obsolete packages:
684 In most cases, assoc+member+push+delq work just as well.
685 And in any case it's just a terrible package: ugly semantics, terrible
686 inefficiency, and not namespace-clean.
701 * New Modes and Packages in Emacs 24.3
703 FIXME? erc-desktop-notifications.el, gv.el, profiler.el,
704 gnus-notifications.el, mm-archive.el
707 * Incompatible Lisp Changes in Emacs 24.3
710 ** set-buffer-multibyte now signals an error in narrowed buffers.
713 ** (random) by default now returns a different random sequence in
714 every Emacs run. Use (random S), where S is a string, to set the
715 random seed to a value based on S, in order to get a repeatable
716 sequence in later calls.
719 ** The function `x-select-font' can return a font spec, instead of a
720 font name as a string. Whether it returns a font spec or a font name
721 depends on the graphical library.
723 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
724 that substring is inserted literally even if the LITERAL arg is
725 non-nil, instead of causing an error to be signaled.
728 ** Docstrings starting with `*' no longer indicate user options.
729 Only variables defined using `defcustom' are considered user options.
730 The function `user-variable-p' is now an obsolete alias for
734 ** The return values of `defalias', `defun' and `defmacro' have changed,
735 and are now undefined. For backwards compatibility, defun and
736 defmacro currently return the name of the newly defined function/macro
737 but this should not be relied upon.
740 ** `face-spec-set' no longer sets frame-specific attributes when the
741 third argument is a frame (that usage was obsolete since Emacs 22.2).
744 ** The arguments of `dbus-register-signal' are no longer just strings,
745 but keywords or keyword-string pairs. The old argument list will
746 still be supported for Emacs 24.x.
749 Some Lisp symbols have been renamed to avoid problems with spelling
750 that is incorrect or inconsistent with how Emacs normally spells a word.
753 *** Renamed functions
755 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
756 **** inactivate-input-method -> deactivate-input-method
757 **** quail-inactivate -> quail-deactivate
758 **** robin-inactivate -> robin-deactivate
759 **** viper-inactivate-input-method -> viper-deactivate-input-method
760 **** viper-inactivate-input-method-action ->
761 viper-deactivate-input-method-action
762 **** ucs-input-inactivate -> ucs-input-deactivate
766 The old hooks are still supported for backward compatibility, but they
767 are deprecated and will be removed eventually.
768 **** input-method-inactivate-hook -> input-method-deactivate-hook
769 **** robin-inactivate-hook -> robin-deactivate-hook
770 **** quail-inactivate-hook -> quail-deactivate-hook
773 *** Renamed Lisp variables
774 **** follow-deactive-menu -> follow-inactive-menu
775 **** inactivate-current-input-method-function ->
776 deactivate-current-input-method-function
779 ** Some obsolete functions, variables, and faces were removed:
780 *** `facemenu-unlisted-faces'
781 *** `rmail-decode-mime-charset'
782 *** `last-input-char', `last-command-char', `unread-command-char'.
783 *** `iswitchb-read-buffer'
784 *** `sc-version', `sc-submit-bug-report'
785 *** `set-char-table-default'
786 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
787 *** `compile-internal'
788 *** `mode-line-inverse-video'
789 *** `cvs-commit-buffer-require-final-newline'
790 (use `log-edit-require-final-newline' instead)
791 *** `cvs-changelog-full-paragraphs'
792 (use `log-edit-changelog-full-paragraphs' instead)
793 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
794 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
795 *** `vc-master-templates' (use `vc-handled-backends' instead)
796 *** `vc-checkout-carefully'
800 * Lisp changes in Emacs 24.3
802 ** New sampling-based Elisp profiler.
803 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
804 The sampling rate can be based on CPU time (only supported on some
805 systems), or based on memory allocations.
807 ** CL-style generalized variables are now in core Elisp.
808 `setf' is autoloaded; `push' and `pop' accept generalized variables.
811 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
812 The interpretation of the DECLS is determined by `defun-declarations-alist'.
816 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
817 of `read-regexp' accepts a string ending with a colon and space, and its
818 second argument DEFAULTS can be a list of strings accessible via M-n
819 in the minibuffer ahead of other hard-coded useful regexp-related values.
820 More commands use `read-regexp' now to read their regexp arguments.
824 *** New function `completion-table-with-quoting' to handle completion
825 in the presence of quoting, such as file completion in shell buffers.
827 *** New function `completion-table-subvert' to use an existing completion
828 table, but with a different prefix.
832 *** New error type and new function `user-error'.
833 These do not trigger the debugger.
835 *** New option `debugger-bury-or-kill'.
837 *** Set `debug-on-message' to enter the debugger when a certain
838 message is displayed in the echo area. This can be useful when trying
839 to work out which code is doing something.
841 *** New var `inhibit-debugger', automatically set to prevent accidental
842 recursive invocations.
846 *** The functions get-lru-window, get-mru-window and get-largest-window
847 now accept a third argument to avoid choosing the selected window.
849 *** Additional values recognized for option `window-combination-limit'.
851 *** New macro `with-temp-buffer-window'.
853 *** `temp-buffer-resize-mode' no longer resizes windows that have been
856 *** New function `fit-frame-to-buffer' and new options
857 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
859 *** New option switch-to-buffer-preserve-window-point to restore a
860 window's point when switching buffers.
862 *** New display action functions `display-buffer-below-selected',
863 and `display-buffer-in-previous-window'.
865 *** New display action alist entry `inhibit-switch-frame', if non-nil,
866 tells display action functions to avoid changing which frame is
869 *** New display action alist entry `pop-up-frame-parameters', if
870 non-nil, specifies frame parameters to give any newly-created frame.
872 *** New display action alist entry `previous-window', if non-nil,
873 specifies window to reuse in `display-buffer-in-previous-window'.
875 *** New display action alist entries `window-height' and `window-width'
876 to specify size of new window created by `display-buffer'.
878 *** The following variables are obsolete, as they can be replaced by
879 appropriate entries in the `display-buffer-alist' function introduced
882 **** `display-buffer-reuse-frames'
884 **** `special-display-regexps'
886 **** `special-display-frame-alist'
888 **** `special-display-buffer-names'
890 **** `special-display-function'
892 **** `display-buffer-function'
894 **** `dired-shrink-to-fit'
898 *** `current-time-string' no longer requires that its argument's year
899 must be in the range 1000..9999. It now works with any year supported
900 by the underlying C implementation.
902 *** `current-time' now returns extended-format time stamps
903 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
904 PSEC is typically a multiple of 1000 on current machines. Other
905 functions that use this format, such as file-attributes and
906 format-time-string, have been changed accordingly. Old-format time
907 stamps are still accepted.
909 *** The format of timers in timer-list and timer-idle-list is now
910 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
911 The PSECS slot is new, and uses picosecond resolution. It can be
912 accessed via the new timer--psecs accessor.
914 *** Last-modified time stamps in undo lists now are of the form
915 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
918 ** Floating point functions now always return special values like NaN,
919 instead of signaling errors, if given invalid args, e.g. (log -1.0).
920 Previously, they returned NaNs on some platforms but signaled errors
921 on others. The affected functions are acos, asin, tan, exp, expt,
922 log, log10, sqrt, and mod.
924 ** Interpreted files are eagerly macro-expanded during load.
925 This can significantly speed up execution of non-byte-compiled code,
926 but can also bump into harmless and previously unnoticed cyclic
927 dependencies. These should not be fatal: they will simply cause the
928 macro-calls to be left for later expansion (as before), but will also
929 result in a warning ("Eager macro-expansion skipped due to cycle")
930 describing the cycle.
932 ** Miscellaneous new functions:
936 *** `autoload-do-load'
938 *** `buffer-narrowed-p' tests if the buffer is narrowed.
940 *** `file-name-base' returns a file name sans directory and extension.
942 *** `function-get' fetches a function property, following aliases.
944 *** `posnp' tests if an object is a `posn'.
945 *** `set-temporary-overlay-map' sets up a temporary overlay map.
947 *** `system-users' returns the user names on the system.
949 *** `system-groups' returns the group names on the system.
951 *** `tty-top-frame' returns the topmost frame of a text terminal.
953 ** New macros `setq-local' and `defvar-local'.
956 ** New fringe bitmap `exclamation-mark'.
958 ** Face underlining can now use a wave.
959 See the "Face Attributes" section of the Elisp manual.
961 ** The following functions and variables are obsolete:
963 *** `automount-dir-prefix'
965 *** `buffer-has-markers-at'
967 *** `macro-declaration-function' (use `macro-declarations-alist')
969 *** `window-system-version'
971 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
973 *** `query-replace-interactive'
975 *** `font-list-limit' (has had no effect since Emacs < 23)
978 * Changes in Emacs 24.3 on non-free operating systems
981 ** Cygwin builds can use the native MS Windows user interface.
982 Pass --with-w32 to configure. The default remains the X11 interface.
984 ** Two new functions are available in Cygwin builds:
985 `cygwin-convert-path-from-windows' and `cygwin-convert-path-to-windows'.
986 These functions allow Lisp code to access the Cygwin file-name mapping
987 machinery to convert between Cygwin and Windows-native file names.
989 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
990 Emacs now supports mouse highlight, help-echo (in the echo area), and
991 `mouse-autoselect-window'.
994 ** On MS Windows Vista and later Emacs now supports symbolic links.
997 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
998 support for libxml2, even if its presence is detected.
1001 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1004 ** On Mac OS X, configure no longer automatically adds the Fink /sw
1005 directories to the search path. You must add them yourself if you want them.
1008 * Changes in Emacs 24.2
1010 ** This is mainly a bug-fix release.
1013 * Installation Changes in Emacs 24.1
1015 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1016 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1017 also depend on Gtk+. You can disable them with --without-rsvg and
1020 ** Emacs can be compiled with GnuTLS support.
1021 This happens by default if a suitably recent version of the library is
1022 found at build time. To prevent this, use the configure option
1023 `--without-gnutls'. See below for GnuTLS features.
1025 ** Emacs can be compiled with SELinux support.
1026 This happens by default if a suitably recent version of the library is
1027 found at build time. To prevent this, use the configure option
1028 `--without-selinux'. See below for SELinux features.
1030 ** Emacs can be compiled with ImageMagick support.
1031 This happens by default if a suitably recent version of the library is
1032 found at build time. To prevent this, use the configure option
1033 `--without-imagemagick'. See below for ImageMagick features.
1034 This feature is not available for the Nextstep or MS ports.
1036 ** Emacs can be compiled with libxml2 support.
1037 This happens by default if a suitably recent version of the library is
1038 found at build time. To prevent this, use the configure option
1039 `--without-xml2'. See below for libxml2 features.
1041 ** By default, the installed Info and man pages are compressed.
1042 You can disable this by configuring --without-compress-info.
1044 ** New configure option --with-wide-int.
1045 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1046 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1049 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1050 These provide no new functionality, they just remove the need to edit
1051 lib-src/Makefile by hand in order to use the associated features.
1053 ** New configure option --enable-use-lisp-union-type.
1054 This is only useful for Emacs developers to debug certain types of bugs.
1055 This is not a new feature; only the configure flag is new.
1057 ** The standalone programs digest-doc and sorted-doc are removed.
1058 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1060 ** The standalone program `fakemail' is removed.
1061 If you need it, feedmail.el provides a superset of the functionality.
1064 * Startup Changes in Emacs 24.1
1066 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1067 command line arguments, and the EMACS_UNIBYTE environment variable, no
1068 longer have any effect. (They were declared obsolete in Emacs 23.)
1070 ** New command line option `--no-site-lisp' removes site-lisp directories
1071 from load-path. -Q now implies this. This option does not affect the
1072 EMACSLOADPATH environment variable (and hence has no effect for
1076 * Changes in Emacs 24.1
1080 *** Many packages now use the `completion-at-point' command,
1081 rather than implementing separate completion commands.
1083 *** `completion-at-point' now handles tags and semantic completion.
1085 *** Completion in a non-minibuffer now tries to detect the end of completion
1086 and pops down the *Completions* buffer accordingly.
1088 *** New option `completion-cycle-threshold' allows completion cycling.
1090 *** New option `completion-category-overrides' for overriding the
1091 default completion style in certain circumstances.
1093 *** New completion style `substring'.
1095 *** Completion of buffer names uses `substring' completion by default.
1097 *** The option `widget-complete-field' has been removed.
1101 *** The first time you try sending mail, Emacs asks for a mail method.
1102 This is implemented by a new default for `send-mail-function', which
1103 is `sendmail-query-once'. This offers to use the smtpmail package, or
1104 to use the old defaults relying on external mail facilities
1105 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1106 `mailclient-send-it' on Windows).
1108 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1109 the report to your desktop's preferred mail client, if there is one.
1110 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1112 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1113 and Mail mode changes
1115 ** Emacs server and client changes
1117 *** New option `server-port' specifies the port for TCP Emacs servers.
1119 *** New emacsclient argument -q/--quiet suppresses some status messages.
1121 *** New emacsclient argument --frame-parameters specifies the frame
1122 parameters of any newly-created graphical frame.
1124 *** If emacsclient shuts down due to Emacs signaling an error,
1125 its exit status is 1.
1127 *** New emacsclient argument --parent-id ID.
1128 This opens a client frame in parent X window ID, via XEmbed, similar
1129 to the --parent-id argument to Emacs.
1131 ** Internationalization changes
1133 *** Emacs now supports display and editing of bidirectional text.
1134 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1135 displayed in the correct visual order as expected by users of those
1136 scripts. The display reordering is a "full bidirectionality" class
1137 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1138 with no RTL text should look exactly the same as before.
1140 **** New buffer-local variable `bidi-display-reordering'.
1141 To disable display reordering in a buffer, change this to nil.
1143 **** New buffer-local variable `bidi-paragraph-direction'.
1144 If nil (the default), Emacs determines the base direction of each
1145 paragraph from its text, as specified by the UBA. Setting the value
1146 to `right-to-left' or `left-to-right' forces a base direction on each
1149 Paragraphs with right-to-left base direction are displayed starting at
1150 the right window edge.
1152 *** Enhanced support for characters with no glyphs in available fonts,
1153 or, on text terminals, characters that cannot be encoded by the
1154 terminal coding system. The new option `glyphless-char-display-control'
1155 specifies how to display them: as a hexadecimal code in a box, a thin
1156 1-pixel space, an empty box, etc.
1158 *** New input methods for Farsi and Bulgarian
1159 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1161 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1162 (U+2010 and U+2011).
1164 *** New Hebrew translation of the Emacs Tutorial.
1165 Type `C-u C-h t' to choose it in case your language setup doesn't
1166 automatically select it.
1168 ** An Emacs Lisp package manager is now included.
1169 This is a convenient way to download and install additional packages,
1170 from a package repository at http://elpa.gnu.org.
1172 *** M-x list-packages shows a list of packages, which can be
1173 selected for installation.
1175 *** New command `describe-package', bound to `C-h P'.
1177 *** By default, all installed packages are loaded automatically when
1178 Emacs starts up. To disable this, set `package-enable-at-startup' to
1179 nil. To specify the packages to load, customize `package-load-list'.
1181 ** Custom theme changes
1183 *** New command `M-x customize-themes', which provides a convenient
1184 interface for enabling and disabling Custom themes.
1186 *** New option `custom-theme-load-path' is the load path for themes.
1187 Emacs no longer looks for Custom themes in `load-path'. The default
1188 value of `custom-theme-load-path' says to look for themes in
1189 `custom-theme-directory', followed by a subdirectory of
1190 `data-directory' named "themes/", which contains a small selection of
1191 built-in Custom themes.
1193 *** New option `custom-safe-themes' records known-safe theme files.
1194 If a theme is not in this list, Emacs queries before loading it, and
1195 offers to save the theme to `custom-safe-themes' automatically. By
1196 default, all themes included in Emacs are treated as safe.
1198 ** Improved GTK integration
1200 *** GTK scroll-bars are now placed on the right by default.
1201 The function `set-scroll-bar-mode' can change this.
1203 *** GTK tool bars can have just text, just images or images and text.
1204 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1205 the default is taken from desktop settings.
1207 *** GTK tool bars can be placed on any edge of the frame.
1208 The frame-parameter tool-bar-position controls this. It takes the
1209 values top, left, right or bottom. The Options => Show/Hide menu has
1212 *** The default colors for selected text (the `region' face) are taken
1213 from the GTK theme when Emacs is built with GTK.
1215 *** Emacs uses GTK tooltips by default if built with GTK.
1216 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1218 ** Graphical interface changes
1220 *** On graphical displays, the mode-line no longer ends in dashes.
1221 Also, the first dash (which does not indicate anything) is just
1222 displayed as a space.
1224 *** `menu-bar-select-buffer-function' lets you choose another operation
1225 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1227 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1228 built with Xft. These fonts can be set via X resources, for example:
1229 Emacs.pane.menubar.font: Courier-12
1233 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1234 or if it receives a SIGINT signal in batch mode.
1236 *** `kill-emacs-hook' is now also run in batch mode.
1237 Third-party code which adds to `kill-emacs-hook' should check if they
1238 do the right thing in batch mode.
1240 ** Scrolling changes
1242 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1243 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1244 of buffer at first key-press (instead they move to top/bottom of buffer)
1245 when `scroll-error-top-bottom' is non-nil.
1247 *** New option `scroll-error-top-bottom' (see above).
1249 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1250 scroll a line instead of full screen.
1252 *** New property `scroll-command' should be set on a command's symbol to
1253 define it as a scroll command affected by `scroll-preserve-screen-position'.
1255 *** If you customize `scroll-conservatively' to a value greater than 100,
1256 Emacs will never recenter point in the window when it scrolls due to
1257 cursor motion commands or commands that move point (e.f., `M-g M-g').
1258 Previously, you needed to use `most-positive-fixnum' as the value of
1259 `scroll-conservatively' to achieve the same effect.
1261 *** "Aggressive" scrolling now honors the scroll margins.
1262 If you customize `scroll-up-aggressively' or
1263 `scroll-down-aggressively' and move point off the window, Emacs now
1264 scrolls the window so as to avoid positioning point inside the scroll
1267 ** Basic SELinux support has been added.
1268 This requires Emacs to be linked with libselinux at build time.
1270 *** Emacs preserves the SELinux file context when backing up.
1271 Also, the function `copy-file' has an extra optional argument for
1272 preserving SELinux context, and the return value of `backup-buffer'
1273 now includes the SELinux context.
1275 *** New functions `file-selinux-context' and `set-file-selinux-context'
1276 get and set the SELinux context of a file.
1280 *** `delete-by-moving-to-trash' now only affects commands that specify
1281 trashing. This avoids inadvertently trashing temporary files.
1283 *** Calling `delete-file' or `delete-directory' with a prefix argument
1284 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1286 ** File- and directory-local variable changes
1288 *** You can stop directory local vars from applying to subdirectories.
1289 Add an element (subdirs . nil) to the alist portion of any variables
1290 settings to indicate that the section should not apply to
1293 *** Directory local variables can apply to some file-less buffers.
1294 Affected modes include dired, vc-dir, and log-edit. For example,
1295 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1296 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1297 `hack-dir-local-variables-non-file-buffer' to support this.
1299 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1300 Instead, use "eval: (minor-mode 1)".
1302 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1303 to `inhibit-local-variables-regexps'. As the name suggests, it now
1304 applies to ALL file local variables, not just -*- lines. The
1305 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1310 *** The `quit-window' command now restores the last buffer displayed
1311 in the quitted window.
1313 *** Resizing an Emacs frame now preserves proportional window sizes,
1314 modulo restrictions like window minimum sizes and fixed-size windows.
1316 *** The behavior of `display-buffer' is now customizable in detail.
1318 **** New option `display-buffer-base-action' specifies a list of
1319 user-determined display "actions" (functions and optional arguments
1320 for choosing the displaying window).
1322 This takes precedence over the default display action, which is
1323 specified by `display-buffer-fallback-action'.
1325 **** New option `display-buffer-alist' maps buffer name regexps to
1326 display actions, taking precedence over `display-buffer-base-action'.
1328 *** New option `window-combination-limit'.
1329 The new option `window-combination-limit' allows to return the space
1330 obtained for resizing or creating a window more reliably to the window
1331 from which such space was obtained.
1333 *** New option `window-combination-resize'.
1334 The new option `window-combination-resize' allows to split a window that
1335 otherwise cannot be split because it's too small by stealing space from
1336 other windows in the same combination. Subsequent resizing or deletion
1337 of the window will resize all windows in the same combination as well.
1339 *** New option `frame-auto-hide-function' lets you choose between
1340 iconifying or deleting a frame when burying a buffer in a dedicated
1341 frame, or quitting a window showing a buffer in a frame of its own.
1343 *** New commands `maximize-window' and `minimize-window'.
1344 These maximize and minimize the size of a window within its frame.
1346 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1347 These functions allow to navigate through the live buffers that have
1348 been shown in a specific window.
1350 ** Minibuffer changes
1352 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1353 This is handy for minibuffer-only frames, and is also used for the feature
1354 where mouse-1 pops up *Messages*"', which can now easily be changed.
1356 *** Minibuffers set `truncate-lines' to nil.
1357 If you want to change the value to something else, you could use
1358 for example `minibuffer-setup-hook'.
1360 ** `auto-mode-case-fold' is now enabled by default.
1362 ** `backup-by-copying-when-mismatch' now defaults to t.
1364 ** New basic faces `error', `warning', `success'.
1365 These are used to highlight text indicating failure, caution or
1366 successful operation.
1368 ** New option `list-colors-sort' defines the color sort order
1369 for `list-colors-display'.
1371 ** The variable `focus-follows-mouse' now always defaults to nil.
1374 * Editing Changes in Emacs 24.1
1378 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1379 `isearch-yank-line'.
1381 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1382 `isearch-yank-kill'.
1384 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1386 ** New commands `count-words-region' and `count-words'.
1388 *** M-= is bound to `count-words-region', not `count-lines-region'.
1389 The `count-words-region' command, when called interactively, reports
1390 the number of lines, words, and characters in the region. It is a
1391 superset of the old `count-lines-region', which is now an obsolete
1394 ** The command `just-one-space' (M-SPC), if given a negative argument,
1395 also deletes newlines around point.
1399 *** New option `delete-active-region'.
1400 If non-nil, [delete] and DEL delete the region if it is active and no
1401 prefix argument is given. If set to `kill', those commands kill
1404 *** New command `delete-forward-char', bound to [delete].
1405 This is meant for interactive use, and obeys `delete-active-region'.
1406 The command `delete-char' does not obey `delete-active-region'.
1408 *** `delete-backward-char' is now a Lisp function.
1409 Apart from obeying `delete-active-region', its behavior is unchanged.
1410 However, the byte compiler now warns if it is called from Lisp; Lisp
1411 callers should use delete-char with a negative argument instead.
1413 *** The option `mouse-region-delete-keys' has been deleted.
1415 ** Selection changes.
1417 The default handling of clipboard and primary selections has been
1418 changed to conform with modern X applications. In short, most
1419 commands for killing and yanking text now use the clipboard, while
1420 mouse commands use the primary selection.
1422 In the following, we provide a list of these changes, followed by a
1423 list of steps to get the old behavior back if you prefer that.
1425 *** `select-active-regions' now defaults to t.
1426 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1427 the kill ring. The selected text is put in the primary selection, if
1428 the system possesses a separate primary selection facility (e.g. X).
1430 **** `select-active-regions' also accepts a new value, `only'.
1431 This means to only set the primary selection for temporarily active
1432 regions (usually made by mouse-dragging or shift-selection);
1433 "ordinary" active regions, such as those made with C-SPC followed by
1434 point motion, do not alter the primary selection.
1436 **** `mouse-drag-copy-region' now defaults to nil.
1438 *** mouse-2 is now bound to `mouse-yank-primary'.
1439 This pastes from the primary selection, ignoring the kill-ring.
1440 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1442 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1444 *** `x-select-enable-primary' now defaults to nil.
1445 Thus, commands that kill text or copy it to the kill-ring (such as
1446 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1448 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1449 exactly equivalent to M-w, C-w, and C-y respectively.
1451 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1452 non-nil by default, as Windows does not support the primary selection
1453 between applications.
1455 *** To return to the previous behavior, do the following:
1457 **** Change `select-active-regions' to nil.
1458 **** Change `mouse-drag-copy-region' to t.
1459 **** Change `x-select-enable-primary' to t (on X only).
1460 **** Change `x-select-enable-clipboard' to nil.
1461 **** Bind `mouse-yank-at-click' to mouse-2.
1463 *** Support for X cut buffers has been removed.
1465 *** X clipboard managers are now supported.
1466 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1468 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1469 in the current rectangle. With a prefix argument, this prompts for a
1470 number to count from and for a format string.
1472 ** `redisplay-dont-pause' now defaults to t.
1473 This makes Emacs feel more responsive to editing commands that arrive
1474 at high rate, e.g. if you lean on some key, because stopping redisplay
1475 in the middle (when this variable is nil) forces more expensive
1476 updates later on, and Emacs appears to be unable to keep up.
1478 ** The behavior of <TAB> for active regions in Text mode has changed.
1479 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1480 when the region is active causes Emacs to indent all the lines in the
1481 region, aligning them with the line previous to the first line in the
1482 region (or with the left margin if there is no previous line).
1484 ** When `occur' is called with a prefix argument, matching strings are
1485 collected into the `*Occur*' buffer without line numbers. If there
1486 are parenthesized subexpressions in the specified regexp, `occur'
1487 reads replacement text that may contain \\& and \\N whose convention
1488 follows `replace-match'.
1491 * Changes in Specialized Modes and Packages in Emacs 24.1
1493 ** Archive Mode has basic support for browsing and updating 7z archives.
1497 *** BibTeX mode now supports biblatex.
1498 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1499 `bibtex-entry-field-alist' is now an obsolete alias for
1500 `bibtex-BibTeX-entry-alist'.
1502 *** New command `bibtex-search-entries', bound to C-c C-a.
1504 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1506 *** New variable `bibtex-search-entry-globally'.
1510 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1512 *** The default browser used by the package is now the "xdg-open" program,
1513 on platforms that support it. This calls your desktop's preferred browser.
1515 ** Calendar, Diary, and Appt
1517 *** Diary entries can contain non-printing "comments".
1518 See the variable `diary-comment-start'.
1520 *** Appointments can specify their individual warning times.
1521 See the variable `appt-warning-time-regexp'.
1523 *** The function specified by `appt-disp-window-function' may be passed
1524 lists of arguments if multiple appointments are due at similar times.
1525 If you are using a custom function for this, you should update it.
1527 *** New function `diary-hebrew-birthday'.
1529 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1530 may no longer be nil, but must all be strings.
1532 *** The obsolete (since Emacs 22.1) method of enabling the appt
1533 package by adding `appt-make-list' to `diary-hook' has been removed.
1534 Use `appt-activate' instead.
1536 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1537 appt-issue-message (use the function appt-activate)
1538 appt-visible/appt-msg-window (use the variable appt-display-format)
1540 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1541 view-diary-entries, list-diary-entries, show-all-diary-entries
1545 *** New feature to "guess" the style in an existing buffer.
1546 The main entry point is M-x c-guess.
1548 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1550 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1551 Thus C-M-a will, by default, go to the beginning of the immediate function,
1554 *** "Macros with semicolons" can be registered for correct indentation.
1555 Where such a macro ends a line (no semicolon) the next statement is no longer
1556 parsed as a statement continuation.
1558 ** Comint and modes derived from it use the standard completion code.
1562 *** Compilation mode can be used without Font Lock mode.
1563 `compilation-parse-errors-function' is now obsolete.
1565 *** New variable `compilation-filter-start', which is bound while
1566 `compilation-filter-hook' runs. It records the start position of the
1567 text inserted by `compilation-filter'.
1569 *** `compilation-error-screen-columns' and `compilation-first-column'
1570 are obeyed in the editing buffer. So programming language modes can
1571 set them, whereas previously only the value in the *Compilation*
1576 *** Customize buffers now contain a search field.
1577 The search is performed using `customize-apropos'.
1578 To turn off the search field, set `custom-search-field' to nil.
1580 *** Options in customize group buffers start out hidden if not customized.
1581 Use the arrow to the left of the option name to toggle visibility.
1583 *** custom-buffer-sort-alphabetically now defaults to t.
1585 *** The color widget now has a "Choose" button, which allows you to
1586 choose a color via `list-colors-display'.
1590 *** It is now possible to access buses other than the default system
1593 *** The `dbus-register-method' and `dbus-register-property' functions
1594 optionally do not register names.
1596 *** The new function `dbus-register-service' registers a known service
1597 name on a D-Bus without also registering a property or a method.
1601 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1602 if called with a prefix argument, read a file name from the minibuffer
1603 instead of using the current buffer.
1605 *** The "dired local variables" feature of Dired-x is obsolete.
1606 The standard directory local variables feature replaces it.
1610 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1611 controlling attempts to autojoin a channel.
1613 *** New variable `erc-coding-system-precedence': If we use `undecided'
1614 as the server coding system, this variable will then be consulted.
1615 The default is to decode strings that can be decoded as utf-8 as
1616 utf-8, and do the normal `undecided' decoding for the rest.
1620 *** The default value of `eshell-directory-name' has changed
1621 to be an "eshell" directory in `user-emacs-directory'.
1622 The old "~/.eshell/" directory is still used if it exists, though.
1626 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1627 It now supports multithread non-stop debugging and simultaneous
1628 debugging of several threads.
1632 *** RET (`image-toggle-animation') toggles animation, if applicable.
1633 Animation plays once, unless the option `image-animate-loop' is non-nil.
1637 *** New command M-x info-display-manual displays a named Info manual.
1638 If that manual is already visited in some Info buffer, it displays
1639 that buffer. (This is handy if you have many manuals in many *info*
1640 buffers, and don't remember the name of the buffer visiting the manual
1641 you want to consult.) Otherwise, it loads and displays the manual.
1643 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1644 This is for compatibility with the stand-alone Info reader program,
1645 and also because `Info-edit' is a rarely used command that is disabled
1648 ** Mail mode changes (not Message mode)
1650 *** New command M-x mail-add-attachment for adding MIME attachments
1652 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1653 (Its name is misleading, since it has nothing to do with MIME
1654 attachments.) The old name is now an obsolete alias to the new name.
1656 ** MH-E has been updated to MH-E version 8.3.1.
1657 See MH-E-NEWS for details.
1659 ** Modula-2 mode provides auto-indentation.
1661 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1663 ** nXML mode no longer binds C-RET to `nxml-complete'.
1664 Completion is now performed via `completion-at-point', bound to C-M-i
1665 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1666 default), this performs tag completion.
1668 ** Org mode has been updated to version 7.8.09.
1669 See ORG-NEWS for details.
1671 ** Prolog mode has been completely revamped, with lots of additional
1672 functionality such as more intelligent indentation, electricity,
1673 support for more variants, including Mercury, and a lot more.
1677 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1678 in the Rmail incoming message.
1680 *** The variable `rmail-message-filter' no longer has any effect.
1681 This change was made in Emacs 23.1 but was not advertised at the time.
1682 Try using `rmail-show-message-hook' instead.
1686 *** M-x shell prompts for the shell path name if the default directory
1687 is a remote file name and neither the environment variable $ESHELL nor
1688 the variable `explicit-shell-file-name' is set.
1690 *** TAB is now bound to the standard `completion-at-point' command,
1691 which now implements the pcomplete rules for shell command completion.
1695 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1696 if the mail server supports them. This uses either built-in GnuTLS
1697 support, or the starttls.el library. Customize `smtpmail-stream-type'
1700 *** The variable `smtpmail-auth-credentials' has been removed.
1701 By default, the information is now stored in the file ~/.authinfo.
1702 This was the default value of smtpmail-auth-credentials. If you had
1703 customized smtpmail-auth-credentials to a list of user names and
1704 passwords, those settings are not used. During your first connection
1705 to the smtp server, Emacs will prompt for the user name and password,
1706 and offer to save them to ~/.authinfo. Or you can manually copy the
1707 credentials to ~/.authinfo. For example, if you had
1709 (setq smtpmail-auth-credentials
1710 '(("mail.example.org" 25 "jim" "s!cret")))
1712 then the equivalent line in ~/.authinfo would be
1714 machine mail.example.org port 25 login jim password s!cret
1716 See the auth-source manual for more information, e.g. on encrypting
1717 the credentials file.
1719 *** The variable `smtpmail-starttls-credentials' has been removed.
1720 If you had that set, you need to put
1722 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1724 in your ~/.authinfo file instead.
1726 *** SMTPmail defaults to using the address in the From: header as the
1727 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1728 to the address you wish to use instead.
1732 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1733 and `sql-oracle-scan-on'.
1735 *** New options controlling prompting for login parameters.
1736 Each supported product has a custom variable `sql-*-login-params',
1737 which is a list of the parameters to be prompted for before a
1738 connection is established.
1740 *** The command `sql-product-interactive' now takes a prefix argument,
1741 which causes it to prompt for an SQL product.
1743 *** Product-specific SQL interactive commands now take prefix arguments.
1744 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1745 given a prefix argument, prompt for a name for the SQL interactive
1746 buffer. This reduces the need for calling `sql-rename-buffer'.
1748 *** SQL interactive modes suppress command continuation prompts, and
1749 replace tabs with spaces. The first change impacts multiple line SQL
1750 statements entered with C-j between each line, statements yanked into
1751 the buffer and statements sent with `sql-send-*' functions. The
1752 second prevents the MySQL and Postgres interpreters from listing
1753 object name completions when sent text via `sql-send-*' functions.
1755 *** New command `sql-connect' starts a predefined SQLi session,
1756 using the login parameters from `sql-connection-alist'.
1758 *** New "Save Connection" menu item in SQLi buffers.
1759 This gathers the login params specified for the SQLi session, if it
1760 was not started by a connection, and saves them as a new connection.
1762 *** New commands for listing database objects and details:
1763 sql-list-all and sql-list-table.
1765 *** An API for manipulating SQL product definitions has been added.
1769 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1773 *** New inline access method "ksu" (kerberized su).
1775 *** The following access methods are discontinued: "ssh1_old",
1776 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1778 *** The user option `remote-file-name-inhibit-cache' controls whether
1779 remote file attributes are cached for better performance.
1781 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1782 default value to "".
1784 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1785 for remote machines which support SELinux.
1787 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1788 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1789 the degree of parallelism.
1791 ** VC and related modes
1793 *** Support for pulling on distributed version control systems.
1794 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1795 supported (currently with Bzr, Git, and Mercurial), to update the
1796 current branch and working tree. A prefix argument means to prompt
1797 the user for specifics, e.g. a pull location.
1799 *** `vc-update' is now an alias for `vc-pull'.
1801 *** Support for merging on distributed version control systems.
1802 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1803 is supported (currently with Bzr, Git, and Mercurial), to merge
1804 changes from another branch into the current one. It prompts for
1805 specifics, e.g. a merge source.
1807 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1808 shows a diff while querying the user. It defaults to t.
1810 *** Log entries in some Log View buffers can be toggled to display a
1811 longer description by typing RET (log-view-toggle-entry-display).
1812 This is currently supported for Bzr, Git, and Mercurial (to support
1813 another backend, define a `log-view-expanded-log-entry-function').
1814 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1815 use this to display the full log entry for the revision at point.
1817 *** New command `vc-ediff' allows visual comparison of two revisions
1818 of a file similar to `vc-diff', but using ediff backend.
1820 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1821 this was not advertised at the time.
1823 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1824 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1825 this was not advertised at the time.
1831 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1833 *** partial-completion-mode (complete.el) is obsolete.
1834 You can get a comparable behavior with:
1835 (setq completion-styles '(partial-completion initials))
1836 (setq completion-pcm-complete-word-inserts-delimiters t)
1838 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1840 *** pgg is obsolete (use EasyPG instead).
1842 *** sregex.el is obsolete, since rx.el is a strict superset.
1844 *** s-region.el and pc-select.el are obsolete.
1845 They are superseded by shift-select-mode, enabled by default since 23.1.
1847 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1851 *** The Landmark game is now invoked with `landmark', not `lm'.
1852 Its functions and variables have been similarly renamed.
1854 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1855 (This interfered with cua-mode.)
1857 *** f90.el has some support for Fortran 2008 syntax.
1859 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1861 *** New command `nato-region' converts text to NATO phonetic alphabet.
1864 * New Modes and Packages in Emacs 24.1
1866 ** Occur Edit mode applies edits made in *Occur* buffers to the
1867 original buffers. It is bound to "e" in Occur mode.
1869 ** New global minor mode electric-pair-mode.
1870 When enabled, typing an open parenthesis automatically inserts the
1871 matching closing one.
1873 ** New global minor mode electric-indent-mode.
1874 When enabled, typing certain characters triggers reindentation.
1875 Major modes wishing to use this can set electric-indent-chars or
1876 electric-indent-functions.
1878 ** New global minor mode electric-layout-mode.
1879 When enabled, typing certain characters automatically inserts newlines.
1880 Major modes wishing to use this can set electric-layout-rules.
1882 ** tabulated-list.el provides a generic major mode for tabulated data,
1883 from which other modes can be derived.
1885 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1887 ** secrets.el is an implementation of the Secret Service API, an
1888 interface to password managers like GNOME Keyring or KDE Wallet. The
1889 Secret Service API requires D-Bus for communication. The command
1890 `secrets-show-secrets' offers a buffer with a visualization of the
1893 ** notifications.el provides an implementation of the Desktop
1894 Notifications API. It requires D-Bus for communication.
1896 ** soap-client.el supports access to SOAP web services from Emacs.
1897 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1899 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1901 ** New emacs-lock.el package.
1902 The previous version has been moved to obsolete/old-emacs-lock.el.
1903 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1904 against exiting Emacs and killing the buffer can be set separately.
1905 The mechanism for automatically turning off protection for buffers
1906 with dead inferior processes has been generalized.
1909 * Incompatible Lisp Changes in Emacs 24.1
1911 ** Passing a nil argument to a minor mode function call now ENABLES
1912 the minor mode unconditionally. This is so that you can write e.g.
1914 (add-hook 'text-mode-hook 'foo-mode)
1916 to enable foo-mode in Text mode buffers, removing the need for
1917 `turn-on-foo-mode' style functions. This affects all mode commands
1918 defined by `define-minor-mode'. If called interactively, the mode
1919 command still toggles the minor mode.
1921 ** The return value of `backup-buffer' has changed.
1922 It is now a list of three elements, where the second element is a list
1923 describing the original file's SELinux context. If Emacs or the
1924 system lacks SELinux support, the context list is (nil nil nil nil).
1925 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1927 ** `char-direction-table' and the `char-direction' function were deleted.
1928 They were buggy and inferior to the new support of bidirectional
1929 editing introduced in Emacs 24. If you need the bidirectional
1930 properties of a character, use `get-char-code-property' with the last
1931 argument `bidi-class'.
1933 ** `copy-directory' now copies the source directory as a subdirectory
1934 of the target directory, if the latter is an existing directory. The
1935 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1936 the contents directly into a pre-existing target directory.
1938 ** For mouse click input events in the text area, the Y pixel
1939 coordinate in the POSITION list now counts from the top of the text
1940 area, excluding any header line. Previously, it counted from the top
1943 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1944 been further reduced. Now a backquote not followed by a space is
1945 always treated as a "new-style" backquote. Please remove all
1946 "old-style" backquotes from your code. If your code uses backquotes
1947 as documented in the Elisp manual, and compiles without warning, then
1948 you have nothing to do in this regard. Code not following the
1949 appropriate conventions may fail to compile.
1951 The most common cause of trouble seems to be an old-style backquote
1952 followed by a newline. Another cause of trouble is vector notation
1953 for key sequence notation: instead of [(control ,)] and [(control ')],
1954 you should write [(control ?,)] and [(control ?')], which will work in
1957 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1958 was not advertised at the time. The function `custom-initialize-delay'
1959 replaced all known uses.
1961 ** `view-buffer' now treats special mode-class in the same way that
1962 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1963 major mode is special).
1965 ** Menu and tool bar changes
1967 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1968 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1969 With these alist entries omitted, `make-frame' checks the value of the
1970 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1971 a menu-bar or tool-bar, respectively. If the alist entries are added,
1972 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1974 *** The menu bar bindings's caches are not used any more.
1975 Use (where-is-internal <def> nil t) instead.
1977 ** Regions created by mouse dragging are now normal active regions,
1978 similar to those created by shift-selection (see Selection changes
1979 above). In previous Emacs versions, these regions were delineated by
1980 `mouse-drag-overlay'; that variable has been removed.
1982 ** The fourth argument of `filter-buffer-substring' has been removed.
1983 If you want to remove text properties from the final result, simply
1984 pass the result through substring-no-properties.
1986 ** cl.el no longer provides `cl-19'.
1988 ** The following obsolete functions and aliases have been removed
1989 (the appropriate new function is given in parentheses; "not needed"
1990 means you can just remove all calls to the function in question):
1992 *** `comint-kill-output' (`comint-delete-output')
1993 *** `decompose-composite-char' (`char-to-string')
1994 *** `outline-visible' (`outline-invisible-p')
1995 *** `internal-find-face' (`facep')
1996 *** `internal-get-face' (`facep and check-face')
1997 *** `frame-update-faces' (not needed)
1998 *** `frame-update-face-colors' (`frame-set-background-mode')
1999 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2000 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2001 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2002 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2003 *** `x-make-font-unbold' (`make-face-unbold')
2004 *** `x-make-font-unitalic' (`make-face-unitalic')
2005 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2006 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2007 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2008 *** `char-bytes' (== 1)
2009 *** `isearch-return-char' (`isearch-printing-char')
2010 *** `make-local-hook' (not needed)
2011 *** `set-screen-height' (`set-frame-height')
2012 *** `set-screen-width' (`set-frame-width')
2014 ** The following obsolete variables and varaliases have been removed
2015 (the appropriate new variable is given in parentheses):
2017 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2018 *** `vc-header-alist' (`vc-BACKEND-header')
2019 *** `directory-sep-char' (== ?/)
2020 *** `font-lock-defaults-alist' (`font-lock-defaults')
2021 *** `e' (`float-e').
2023 ** The following obsolete files were removed:
2024 sc.el, x-menu.el, rnews.el, rnewspost.el
2026 ** The format of the finder-inf.el file has changed, since the Finder
2027 mechanism is now based on the package system. The variable
2028 `finder-package-info' is replaced by `package--builtins' and
2029 `finder-keywords-hash'.
2031 ** When generating autoloads, `update-directory-autoloads' no longer
2032 assumes every inspected file is in your `load-path'. It instead
2033 generates relative names according to the current `load-path'.
2036 * Lisp changes in Emacs 24.1
2038 ** Code can now use lexical scoping by default instead of dynamic scoping.
2039 The `lexical-binding' variable enables lexical scoping for local
2040 variables. It is typically set via a file-local variable in the first
2041 line of the file, in which case it applies to all the code in that
2044 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2045 binding instead of the old dynamic binding mode.
2047 *** Lexically scoped interpreted functions are represented with a new form
2048 of function value which looks like (closure ENV ARGS &rest BODY).
2050 *** New macro `letrec' to define recursive local functions.
2052 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2053 So do `defcustom' and other forms that call `defvar' as a subroutine.
2055 *** New function `special-variable-p' to check whether a variable is
2056 declared as dynamically bound.
2058 *** The form ((lambda ...) ...) is deprecated.
2060 ** An Emacs Lisp testing tool is now included.
2061 Emacs Lisp developers can use this tool to write automated tests for
2062 their code. See the ERT info manual for details.
2064 ** Changes for bidirectional display and editing
2066 *** New function `current-bidi-paragraph-direction'.
2067 This returns the base direction of the paragraph at point.
2069 *** New function `bidi-string-mark-left-to-right'.
2070 Given a string containing characters from right-to-left scripts, this
2071 function returns another string which can be safely inserted into a
2072 buffer, such that any following text will be always displayed to the
2073 right of that string. (This works by appending an invisible Unicode
2074 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2076 This is useful when the buffer has overall left-to-right paragraph
2077 direction and you need to insert a string whose contents are not known
2078 in advance, without disrupting the layout of the line.
2082 *** Window tree functions are accessible in Elisp.
2083 Functions are provided to return the parent, siblings or child windows
2084 of any window including internal windows (windows not associated with a
2085 buffer) in the window tree.
2087 **** New function `window-valid-p' gives non-nil for live and internal
2090 **** Window manipulation can deal with internal windows.
2091 Many window handling functions like `split-window', `delete-window', or
2092 `delete-other-windows' as well as the window resizing functions can now
2093 act on any window including internal ones.
2095 *** window-total-height/-width vs window-body-height/-width.
2096 The function `window-height' has been renamed to `window-total-height'
2097 and `window-width' has been renamed to `window-body-width'. The old
2098 names are provided as aliases. Two new functions `window-total-width'
2099 and `window-body-height' are provided.
2101 *** Window parameters specific to window handling functions.
2102 For each window you can specify a parameter to override the default
2103 behavior of a number of functions like `split-window', `delete-window'
2104 and `delete-other-windows'. The variable `ignore-window-parameters'
2105 allows to ignore processing such parameters.
2107 *** New semantics of third argument of `split-window'.
2108 The third argument of `split-window' has been renamed to SIDE and can be
2109 set to any of the values 'below, 'right, 'above, or 'left to make the
2110 new window appear on the corresponding side of the window that shall be
2111 split. Any other value of SIDE will cause `split-window' to split the
2112 window into two side-by-side windows as before.
2114 *** Window resizing functions.
2115 A new standard function for resizing windows called `window-resize' has
2116 been introduced. This and all other functions for resizing windows no
2117 longer delete any windows when they become too small.
2119 *** Deleting the selected window now selects the most recently selected
2120 live window on that frame instead.
2122 *** `adjust-window-trailing-edge' adjustments.
2123 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2124 is able to resize other windows if a window adjacent to the trailing
2125 edge cannot be shrunk any more. This makes its behavior more similar to
2126 that of Emacs 21 without compromising, however, its inability to delete
2127 windows which was introduced in Emacs 22.
2129 *** Window-local buffer lists.
2130 Windows now have local buffer lists. This means that removing a buffer
2131 from display in a window will preferably show the buffer previously
2132 shown in that window with its previous window-start and window-point
2133 positions. This also means that the same buffer may be automatically
2134 shown twice even if it already appears in another window.
2136 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2137 which if non-nil requires the buffer to be displayed in the currently
2138 selected window, signaling an error otherwise. If nil, another window
2139 can be used, e.g. if the selected one is strongly dedicated.
2141 *** `split-window-vertically' and `split-window-horizontally' renamed
2142 to `split-window-below' and `split-window-right' respectively.
2143 The old names are kept as aliases.
2147 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2148 named ACTION, and takes a display action of the same form as
2149 `display-buffer-base-action' (see Changes, above). A non-nil,
2150 non-list value is treated specially, as the old meaning.
2152 **** New variable `display-buffer-overriding-action'.
2154 **** The procedure of `display-buffer' etc. to choose a window is
2155 determined by combining `display-buffer-overriding-action',
2156 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2157 and `display-buffer-fallback-action'. The second and fourth of these
2158 are user-customizable variables.
2160 See the docstring of `display-buffer' for details.
2162 *** New functions `window-state-get' and `window-state-put'.
2163 These functions allow to save and restore the state of an arbitrary
2164 frame or window as an Elisp object.
2168 *** New variable `completion-extra-properties' used to specify extra
2169 properties of the current completion:
2170 - :annotate-function, same as the old completion-annotate-function.
2171 - :exit-function, function to call after completion took place.
2173 *** Functions on `completion-at-point-functions' can return any of the
2174 properties valid for `completion-extra-properties'.
2176 *** `completion-annotate-function' is obsolete.
2178 *** New `metadata' method for completion tables. The metadata thus returned
2179 can specify various details of the data returned by `all-completions':
2180 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2181 used to select a style in completion-category-overrides.
2182 - `annotation-function' to add annotations in *Completions*.
2183 - `display-sort-function' to specify how to sort entries in *Completions*.
2184 - `cycle-sort-function' to specify how to sort entries when cycling.
2186 *** `minibuffer-local-filename-must-match-map' is not used any more.
2187 Instead, the bindings in `minibuffer-local-filename-completion-map'
2188 are combined with `minibuffer-local-must-match-map'.
2190 *** New variable `completing-read-function' allows overriding the
2191 behavior of `completing-read'.
2193 ** `glyphless-char-display' can now distinguish between graphical and
2194 text terminal display, via a char-table entry that is a cons cell.
2196 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2197 Instead, the offending function is removed.
2201 *** New function `run-hook-wrapped' for running an abnormal hook by
2202 passing the hook functions as arguments to a "wrapping" function.
2203 Like `run-hook-with-args-until-success', it stops at the first
2204 non-nil return value.
2206 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2207 set of "wrapping" filters, similar to around advice.
2208 (A version of this macro was actually added in Emacs 23.2 but was not
2209 advertised at the time.)
2213 *** New macro `condition-case-unless-debug' (this was actually added in
2214 Emacs 23.1 as condition-case-no-debug, but not advertised)
2216 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2218 *** Variable `stack-trace-on-error' removed.
2220 *** The debugger can now "continue" from an error, which means it will
2221 jump to the error handler as if the debugger had not been invoked
2222 instead of jumping all the way to the top-level.
2224 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2225 This can be useful when `inhibit-quit' is set.
2227 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2228 named Emacs server instances.
2230 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2231 to redirect STDOUT to a file.
2233 ** The function `format-time-string' now supports the %N directive,
2234 for higher-resolution time stamps.
2236 ** New input reading functions
2238 *** New function `read-char-choice' reads a restricted set of
2239 characters, discarding any inputs not inside the set.
2241 *** The command `read-color' now requires a match for a color name
2242 or RGB triplet, instead of signaling an error if the user provides
2245 **** `facemenu-read-color' is now an alias for `read-color'.
2247 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2248 The variable is now used to load all kind of supported dynamic libraries,
2249 not just image libraries. The previous name is still available as an
2252 ** Syntax parsing changes
2254 *** New variable `syntax-propertize-function'.
2255 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2256 This allows syntax-table properties to be set independently from font-lock:
2257 just call syntax-propertize to make sure the text is propertized.
2258 Together with this new variable come a new hook
2259 syntax-propertize-extend-region-functions, as well as two helper functions:
2260 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2261 as-is; and syntax-propertize-rules which provides a new way to specify
2264 *** Syntax tables support a new "comment style c" additionally to style b.
2266 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2268 ** frame-local variables cannot be let-bound any more.
2270 ** Major and minor mode changes
2272 *** `set-auto-mode' now respects mode: local variables at the end of files,
2273 as well as those in the -*- line.
2275 *** `prog-mode' is a new major mode from which programming modes
2278 **** `prog-mode-hook' can be used to enable features for programming
2279 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2280 on-the-fly spell checking for comments and strings.
2282 *** New hook `change-major-mode-after-body-hook', run by
2283 `run-mode-hooks' just before any other mode hooks.
2285 *** Enabled globalized minor modes can be disabled in specific major modes.
2286 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2287 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2289 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2291 ** File-handling changes
2293 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2294 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2295 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2296 argument is supplied (see Trash changes, above).
2298 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2300 ** Tool-bars can display separators.
2301 Tool-bar separators are handled like menu separators in menu-bar maps,
2302 i.e. via menu entries of the form `(menu-item "--")'.
2306 *** Animated images support (currently animated gifs only).
2308 **** `image-animated-p' returns non-nil if an image can be animated.
2310 **** `image-animate' animates a supplied image spec.
2312 **** `image-animate-timer' returns the timer object for an image that
2315 *** `image-extension-data' has been renamed to `image-metadata'.
2316 The old name is an obsolete alias to the new one.
2318 *** Image mode can view any image type that ImageMagick supports.
2319 This requires Emacs to be built with ImageMagick support.
2321 **** New function `imagemagick-types', defined if ImageMagick support
2322 is enabled, returns a list of image file extensions that your
2323 ImageMagick installation supports.
2325 **** New function `imagemagick-register-types' enables ImageMagick
2326 image types in Image mode and in `create-image' and other helper
2329 **** New option `imagemagick-types-inhibit' excludes certain
2330 ImageMagick image types from `imagemagick-register-types'.
2332 **** With ImageMagick support, there are extra Image mode commands to
2333 resize and rotate images: `image-transform-fit-to-height',
2334 `image-transform-fit-to-width', `image-transform-set-rotation', and
2335 `image-transform-set-scale'.
2337 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2338 passes it to the mail user agent function. This argument specifies an
2339 action for returning to the caller after finishing with the mail. For
2340 example, this is used by Rmail to optionally delete a mail window.
2342 ** XML and HTML parsing
2343 If Emacs is compiled with libxml2 support, there are two new
2344 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2345 and `libxml-parse-xml-region' (which parses XML). Both return an
2346 Emacs Lisp parse tree.
2348 ** Networking and encryption changes
2350 *** `open-network-stream' can now be used to open an encrypted stream.
2351 It now accepts an optional `:type' parameter for initiating a TLS
2352 connection, directly or via STARTTLS. To do STARTTLS, additional
2353 parameters (`:end-of-command', `:success', `:capabilities-command')
2354 must also be supplied.
2356 *** New library gnutls.el.
2357 The new function `gnutls-available-p' returns non-nil if Emacs is
2358 built with GnuTLS support. The main entry points are
2359 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2360 these functions through `open-network-stream', because that can
2361 upgrade connections through STARTTLS opportunistically or use plain
2362 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2365 *** New primitive `secure-hash' that supports many secure hash algorithms:
2366 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2367 sha1.el has been removed. The `sha1' feature is provided by default.
2371 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2373 ** Progress reporters can now "spin".
2374 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2375 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2376 time you call `progress-reporter-update' on that progress reporter,
2377 with a nil or omitted VALUE argument, the reporter message is
2378 displayed with a "spinning bar".
2380 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2381 being reverted, even if the buffer has a local `revert-buffer-function'.
2383 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2384 If delayed-warnings-list is non-nil, the command loop calls
2385 `delayed-warnings-hook' after `post-command-hook'. At present, this
2386 is only used by Emacs on some platforms to display warnings during
2387 startup, which might otherwise not be noticed. This uses the
2388 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2390 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2392 ** New function `make-composed-keymap' that constructs a new keymap
2393 from multiple input maps. You can use this to make a keymap that
2394 inherits from multiple maps, eg:
2395 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2397 ** New function `string-prefix-p'.
2398 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2400 ** New reader macro ## that stands for the empty symbol.
2401 This means that the empty symbol can now be read back. Also, #: by itself
2402 (when not immediately followed by a possible symbol character) stands for
2403 an empty uninterned symbol.
2405 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2407 ** The following functions and variables are obsolete:
2409 *** `tooltip-use-echo-area' is obsolete.
2410 Rather than setting this to t, disable Tooltip mode instead.
2412 *** buffer-substring-filters is obsolete.
2413 Use `filter-buffer-substring-functions' instead.
2415 *** `byte-compile-disable-print-circle' is obsolete.
2417 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2418 Use `post-command-hook' instead.
2420 *** `font-lock-maximum-size' is obsolete.
2423 * Changes in Emacs 24.1 on non-free operating systems
2425 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2426 and also when HOME is set to C:\ by default.
2428 ** New configure.bat options
2430 *** --enable-checking builds Emacs with extra runtime checks.
2432 *** --distfiles specifies files to be included in binary distribution.
2434 *** --without-gnutls disables automatic GnuTLS detection.
2436 *** --lib for general library linkage, works with the USER_LIBS build variable.
2438 ** New make target `dist' to create binary distribution for MS Windows.
2440 ** The Lisp function `w32-default-color-map' is now obsolete.
2441 (It is only used internally in the Emacs C code.)
2443 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2444 reappear on mouse-over. (Requires OS X 10.6 or later.)
2446 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2447 other platforms, rather than inserting its contents into the buffer.
2450 ----------------------------------------------------------------------
2451 This file is part of GNU Emacs.
2453 GNU Emacs is free software: you can redistribute it and/or modify
2454 it under the terms of the GNU General Public License as published by
2455 the Free Software Foundation, either version 3 of the License, or
2456 (at your option) any later version.
2458 GNU Emacs is distributed in the hope that it will be useful,
2459 but WITHOUT ANY WARRANTY; without even the implied warranty of
2460 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2461 GNU General Public License for more details.
2463 You should have received a copy of the GNU General Public License
2464 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2469 paragraph-separate: "[
\f]*$"