1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2012 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.3
27 ** The default toolkit has been changed to Gtk+ version 3.
28 If you don't pass --with-x-toolkit to configure or if you pass
29 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
30 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
31 You can explicitly require a specific version by passing
32 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
35 ** New configure option '--without-all' to disable additional features.
36 This disables most of the features that are normally enabled by default.
39 ** New configure option '--enable-link-time-optimization' to utilize
40 an appropriate feature provided by GCC since version 4.5.0.
43 ** New configure option '--enable-gcc-warnings', intended for developers.
44 If building with GCC, this enables compile-time checks that warn about
45 possibly-questionable C code. On a recent GNU system there should be
46 no warnings; on older and on non-GNU systems the generated warnings
50 ** The configure option '--enable-use-lisp-union-type' has been
51 renamed to '--enable-check-lisp-object-type', as the resulting
52 Lisp_Object type no longer uses a union to implement the compile time
53 check that this option enables.
56 ** The configure option '--disable-maintainer-mode' has been removed,
57 as it was confusingly-named and rarely useful.
60 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
61 overwriting "emacs" in the installation bin/ directory with a link
65 ** The configure options `--program-prefix', `--program-suffix', and
66 `--program-transform-name' apply to more than just the installed
67 binaries. Now they also affect the man pages, icons, and the
68 etc/emacs.desktop file; but not the info pages, since this would break
69 links between the various manuals.
72 ** Emacs uses libtinfo in preference to libncurses, if available.
75 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
76 /usr/pkg/lib to the linker search path. You must add them yourself if
80 ** On Mac OS X, configure no longer automatically adds the Fink /sw
81 directories to the search path. You must add them yourself if you want them.
84 ** The standalone scripts rcs-checkin and vcdiff have been removed
85 (from the bin and libexec directories, respectively). The former is
86 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
89 ** The native Windows user interface is available for Cygwin. Passing
90 --with-w32 will configure a Cygwin emacs to use the Windows user
91 interface instead of the default, X11.
94 * Startup Changes in Emacs 24.3
97 ** Emacs no longer searches for `leim-list.el' files beneath the standard
98 lisp/ directory. There should not be any there anyway. If you have
99 been adding them there, put them somewhere else, eg site-lisp.
102 ** The `--no-site-lisp' command line option now works for Nextstep builds.
105 * Changes in Emacs 24.3
108 ** Most y-or-n prompts now allow you to scroll the selected window.
109 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
110 respectively, without exiting from the prompt.
114 *** New option `mode-line-default-help-echo' specifies the help text
115 (shown in a tooltip or in the echo area) for any part of the mode line
116 that does not have its own specialized help text.
118 *** You can now click mouse-3 in the coding system indicator to invoke
119 `set-buffer-file-coding-system'.
124 *** `C-h f' (describe-function) can now perform autoloading.
125 When this command is called for an autoloaded function whose docstring
126 contains a key substitution construct, that function's library is
127 automatically loaded, so that the documentation can be shown
128 correctly. To disable this, set `help-enable-auto-load' to nil.
131 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
132 even after their associated libraries have been loaded (and the
133 autoloads have been redefined as functions).
135 ** Minibuffer changes
137 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
138 next and previous path separator, respectively.
140 *** minibuffer-electric-default-mode can rewrite (default ...) to [...].
141 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
143 ** ImageMagick support, if available, is automatically enabled.
144 It is no longer necessary to call `imagemagick-register-types'
145 explicitly to install ImageMagick image types; that function is called
146 automatically at startup, or when customizing a relevant imagemagick-
149 *** Setting `imagemagick-types-inhibit' to t now disables the use of
150 ImageMagick to view images. You must call imagemagick-register-types
151 afterwards if you do not use customize to change this.
153 *** The new variable `imagemagick-enabled-types' also affects which
154 ImageMagick types are treated as images. The function
155 `imagemagick-filter-types' returns the list of types that will be
158 *** Images displayed via ImageMagick now support transparency and the
159 :background image spec property.
161 ** Server and client changes
163 *** emacsclient now obeys string values for `initial-buffer-choice',
164 if it is told to open a new frame without specifying any file to visit
165 or expression to evaluate.
167 *** New option `server-auth-key' specifies a shared server key.
169 ** In the Package Menu, newly-available packages are listed as "new",
170 and sorted above the other "available" packages by default.
173 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
174 This minor mode replaces `toggle-read-only', which is now obsolete.
176 ** Emacs now generates backtraces on fatal errors.
177 On encountering a fatal error, Emacs now outputs a textual description
178 of the fatal signal, and a short backtrace on platforms like glibc
179 that support backtraces.
182 ** If your Emacs was built from a bzr checkout, the new variable
183 `emacs-bzr-version' contains information about the bzr revision used.
186 ** New variable `create-lockfiles' specifies usage of lockfiles.
187 It defaults to t. Changing it to nil inhibits the creation of lock
188 files (use this with caution).
191 ** Using "unibyte: t" in Lisp source files is obsolete.
192 Use "coding: raw-text" instead.
195 ** Setting `enable-remote-dir-locals' to non-nil allows directory
196 local variables on remote hosts.
199 ** The entry for PCL-CVS has been removed from the Tools menu.
200 The PCL-CVS commands are still available via the keyboard.
202 ** Internationalization changes
204 *** New language environment: Persian.
206 *** New input method `vietnamese-vni'.
208 ** NextStep/OSX port changes.
210 *** OSX 10.4 or newer is required to build Emacs.
212 *** Fullscreen and frame parameter fullscreen is supported.
214 *** A file dialog is used for open/save operations initiated from the
218 * Editing Changes in Emacs 24.3
220 ** Navigation command changes
222 *** New binding `M-g c' for `goto-char'.
224 *** New binding `M-g TAB' for `move-to-column'.
226 *** `M-g TAB' (`move-to-column') prompts for a column number if called
227 interactively with no prefix arg. Previously, it moved to column 1.
229 ** Search and Replace changes
231 *** Non-regexp Isearch now performs "lax" space matching.
232 Each sequence of spaces in the supplied search string may match any
233 sequence of one or more whitespace characters, as specified by the
234 variable `search-whitespace-regexp'. (This variable is also used by a
235 similar existing feature for regexp Isearch).
237 *** New Isearch command `M-s SPC' toggles lax space matching.
238 This applies to both ordinary and regexp Isearch.
240 *** New option `replace-lax-whitespace'.
241 If non-nil, `query-replace' uses flexible whitespace matching too.
244 *** Global `M-s _' starts a symbol (identifier) incremental search,
245 and `M-s _' in Isearch toggles symbol search mode.
246 `M-s c' in Isearch toggles search case-sensitivity.
249 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
250 `ucs-insert' is now an obsolete alias for `insert-char'.
253 ** The `z' key no longer has a binding in most special modes.
254 It used to be bound to `kill-this-buffer', but `z' is too easy to
258 ** New option `delete-trailing-lines' specifies whether
259 M-x delete-trailing-whitespace should delete trailing lines at the end
260 of the buffer. It defaults to t.
264 *** `C-x r +' is now overloaded to invoke `append-to-register.
266 *** New option `register-separator' specifies the register containing
267 the text to put between collected texts for use with M-x
268 append-to-register and M-x prepend-to-register.
271 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
274 ** New command `C-x r M-w' (copy-rectangle-as-kill).
275 It copies the region-rectangle as the last rectangle kill.
277 ** New option `yank-handled-properties' allows processing of text
278 properties on yanked text, in more ways that are more general than
279 just removing them, as done by `yank-excluded-properties'.
282 * Changes in Specialized Modes and Packages in Emacs 24.3
286 *** The faces used by Apropos are now directly customizable.
287 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
288 see the `apropos' Custom group for details.
290 *** The old options whose values specified faces to use were removed
291 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
294 This package has been rewritten to use Tabulated List mode.
296 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
297 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
302 *** You can customize the header text that appears above each calendar month.
303 See the variable `calendar-month-header'.
306 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
309 *** The calendars produced by cal-html include holidays.
310 Customize `cal-html-holidays' to change this.
314 *** CL's main entry is now (require 'cl-lib).
315 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
316 i.e. all its definitions have the "cl-" prefix (and internal definitions use
319 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
320 under the name `cl-foo' instead, with the exceptions of the few definitions
321 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
322 which have not been renamed to `cl-foo*' but just `cl-foo'.
324 The old `cl' is now deprecated and is just a bunch of aliases that
325 provide the old non-prefixed names.
327 *** `cl-flet' is not like `flet' (which is deprecated).
328 Instead it obeys the behavior of Common-Lisp's `flet'.
330 *** `cl-labels' is slightly different from `labels'.
331 The difference is that it relies on the `lexical-binding' machinery (as opposed
332 to the `lexical-let' machinery used previously) to capture definitions in
333 closures, so such closures will only work if `lexical-binding' is in use.
335 *** `progv' was rewritten to use the `let' machinery.
336 A side effect is that vars without corresponding value are bound to nil
337 rather than making them unbound.
341 *** New option `compilation-always-kill'.
345 *** `custom-reset-button-menu' now defaults to t.
347 *** Non-option variables are never matched in `customize-apropos' and
348 `customize-apropos-options' (i.e. the prefix argument does nothing for
353 *** `desktop-path' no longer includes the "." directory. Desktop
354 files are now located in ~/.emacs.d by default.
359 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
362 *** The D-Bus object manager interface is implemented.
365 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
366 if their value does not fit into Emacs's integer range.
369 *** The function `dbus-call-method' works non-blocking now, it can be
370 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
373 *** Signals can be sent also as unicast message.
376 *** The argument list of `dbus-register-signal' has been extended,
377 according to the new match rule types of D-Bus. See the manual for
381 *** `dbus-init-bus' supports private connections.
384 *** There is a new function `dbus-setenv'.
388 *** Changes are now highlighted using the same color scheme as in
389 modern VCSes. Deletions are displayed in red (new faces
390 `diff-refine-removed' and `smerge-refined-removed' and new definition
391 of `diff-removed'), insertions in green (new faces `diff-refine-added'
392 and `smerge-refined-added' and new definition of `diff-added').
394 *** The variable `diff-use-changed-face' defines whether to use the
395 face `diff-changed', or `diff-removed' and `diff-added' to highlight
396 changes in context diffs.
398 *** The new command `diff-remove-trailing-whitespace' fixes trailing
399 whitespace problems introduced by the diff.
403 *** `dired-do-async-shell-command' executes each file sequentially
404 if the command ends in `;' (when operating on multiple files).
405 Otherwise, it executes the command on each file in parallel.
407 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
408 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
411 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
412 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
413 mark/unmark/flag all files in the active region.
415 *** The minibuffer default for `=' (`dired-diff) has changed.
416 It is now the backup file for the file at point, if one exists.
417 In Transient Mark mode the default is the file at the active mark.
419 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
420 The global binding for `M-=', `count-words-region' is in effect.
423 ** Ediff now uses the same color scheme as Diff mode.
425 ** erc will look up server/channel names via auth-source and use the
426 channel keys found, if any.
428 ** Flymake uses fringe bitmaps to indicate errors and warnings.
429 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
430 `flymake-warning-bitmap'.
434 *** The obsolete variable `follow-mode-off-hook' has been removed.
436 *** Follow mode no longer works by using advice.
437 The option `follow-intercept-processes' has been removed.
441 *** The option `ffap-url-unwrap-remote' can now be a list of strings,
442 specifying URL types which should be converted to remote file names at
443 the FFAP prompt. The default is now '("ftp").
446 `javascript-generic-mode' is now an obsolete alias for `js-mode'.
450 *** New `derived-mode' filter, bound to `/ M'.
451 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
453 ** Mouse Avoidance mode
455 The new variable `mouse-avoidance-banish-position' can now be used to
456 customize Mouse Avoidance mode further.
459 ** notifications.el supports now version 1.2 of the Notifications API.
460 The function `notifications-get-capabilities' returns the supported
463 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
464 closing brackets to be aligned with the line of the opening bracket.
466 ** In Proced mode, new command `proced-renice' renices marked processes.
470 A new version of python.el, which provides several new features, including:
471 per-buffer shells, better indentation, Python 3 support, and improved
472 shell-interaction compatible with iPython (and virtually any other
475 *** Some user options have been replaced/renamed:
476 Old defcustom: | New defcustom:
477 python-indent | python-indent-offset
478 python-guess-indent | python-indent-guess-indent-offset
479 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
480 python-use-skeletons | python-skeleton-autoinsert
482 *** Some user options have been removed:
484 **** `python-indent-string-contents': Strings are never indented.
486 **** `python-honour-comment-indentation':
487 Comments are never considered as indentation markers themselves.
489 **** `python-continuation-offset': Indentation is automatically
490 calculated in a pep8 compliant way depending on the context.
492 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
493 Have no direct mapping as the shell interaction is completely different.
495 **** `python-python-command', `python-jython-command':
496 Replaced by `python-shell-interpreter'.
498 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
499 `python-pdbtrack-minor-mode-string', `python-source-modes':
502 *** Some commands have been replaced:
503 Old command | New command
504 python-insert-class | python-skeleton-class
505 python-insert-def | python-skeleton-def
506 python-insert-for | python-skeleton-for
507 python-insert-if | python-skeleton-if
508 python-insert-try/except | python-skeleton-try
509 python-insert-try/finally | python-skeleton-try
510 python-insert-while | python-skeleton-while
511 python-find-function | python-nav-jump-to-defun
512 python-next-statement | python-nav-forward-sentence
513 python-previous-statement | python-nav-backward-sentence
514 python-send-buffer | python-shell-send-buffer
515 python-send-defun | python-shell-send-defun
516 python-send-region | python-shell-send-region
517 python-send-region-and-go | Emulate with python-shell-send-region and
518 python-shell-switch-to-shell
519 python-send-string | python-shell-send-string
520 python-switch-to-python | python-shell-switch-to-shell
521 python-describe-symbol | python-eldoc-at-point
523 ** reStructuredText mode
525 *** Rebind nearly all keys making room for more keys and complying
526 better to usage in other modes. Describe bindings with C-c C-h.
528 *** Major revision of indentation working very similar to other
529 modes. TAB is your friend.
531 *** Major revision of filling working fine with most of
532 reStructuredText syntax. Support auto-filling.
534 *** Major revision of comment handling.
536 *** Major revision of fontification working with `jit-lock-mode'.
538 *** Cover reStructuredText syntax more closely. Improve
539 the experience for Sphinx users.
541 *** `rst-insert-list' inserts new list or continues existing lists.
543 *** Extend correct and improve customization.
545 *** Negative prefix argument always works for `rst-adjust'.
547 *** Reset window configuration after displaying TOC.
549 *** Package version in `rst-version'.
551 *** Support `imenu' and `which-func'.
555 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
557 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
559 *** `sh-use-smie' lets you choose a new indentation and navigation code.
563 *** New option `async-shell-command-buffer' specifies what buffer to use
564 for a new asynchronous shell command when the default output buffer
565 `*Async Shell Command*' is already taken by another running command.
569 *** DB2 added `sql-db2-escape-newlines'
571 If non-nil, newlines sent to the command interpreter will be escaped
572 by a backslash. The default does not escape the newlines and assumes
573 that the sql statement will be terminated by a semicolon.
575 ** Tabulated List and packages derived from it
577 *** New command `tabulated-list-sort', bound to `S', sorts the column
578 at point, or the Nth column if a numeric prefix argument is given.
582 The variables `term-default-fg-color' and `term-default-bg-color' are
583 now deprecated in favor of the `term-face' face, that you can
584 customize. Also, it is now possible to customize how are displayed the
585 ANSI terminal colors and styles by customizing the corresponding
586 `term-color-<COLOR>', `term-color-underline' and `term-color-bold'
591 *** The syntax has been extended in order to allow ad-hoc proxy
592 definitions. See the manual for details.
594 *** Remote processes are now supported also on remote Windows host.
598 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
599 Previously, this slot stored semicolon-separated attribute-value pairs
600 appended to some imap URLs, but this is not compatible with RFC 3986.
601 So now the `filename' slot stores the entire path and query components
602 and the `attributes' slot is always nil.
604 *** New function `url-encode-url' for encoding a URI string.
605 The `url-retrieve' function now uses this to encode its URL argument,
606 in case that is not properly encoded.
610 *** The free software compiler GHDL is supported (and now the default).
612 *** Support for the VHDL-AMS packages has been added/updated.
614 *** Updated to the 2002 revision of the VHDL standard.
616 *** Accepts \r and \f as whitespace.
618 ** which-function-mode now applies to all applicable major modes by default.
621 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
624 ** FIXME something happened to ses.el, 2012-04-17.
626 ** Hooks renamed to avoid obsolete "-hooks" suffix:
627 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
628 *** semantic-change-hooks -> semantic-change-functions
629 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
630 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
631 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
632 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
633 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
634 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
635 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
636 *** rcirc-activity-hooks -> rcirc-activity-functions
637 *** rcirc-print-hooks -> rcirc-print-functions
638 *** dbus-event-error-hooks -> dbus-event-error-functions
639 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
640 *** checkdoc-style-hooks -> checkdoc-style-functions
641 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
642 *** archive-extract-hooks -> archive-extract-hook
643 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
644 *** hfy-post-html-hooks -> hfy-post-html-hook
645 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
646 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
647 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
648 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
650 ** Obsolete packages:
653 In most cases, assoc+member+push+delq work just as well.
654 And in any case it's just a terrible package: ugly semantics, terrible
655 inefficiency, and not namespace-clean.
670 * New Modes and Packages in Emacs 24.3
672 FIXME? erc-desktop-notifications.el, gv.el, profiler.el,
673 gnus-notifications.el, mm-archive.el
676 * Incompatible Lisp Changes in Emacs 24.3
679 ** set-buffer-multibyte now signals an error in narrowed buffers.
682 ** (random) by default now returns a different random sequence in
683 every Emacs run. Use (random S), where S is a string, to set the
684 random seed to a value based on S, in order to get a repeatable
685 sequence in later calls.
688 ** The function `x-select-font' can return a font spec, instead of a
689 font name as a string. Whether it returns a font spec or a font name
690 depends on the graphical library.
692 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
693 that substring is inserted literally even if the LITERAL arg is
694 non-nil, instead of causing an error to be signaled.
697 ** Docstrings starting with `*' no longer indicate user options.
698 Only variables defined using `defcustom' are considered user options.
699 The function `user-variable-p' is now an obsolete alias for
703 ** The return values of `defalias', `defun' and `defmacro' have changed,
704 and are now undefined. For backwards compatibility, defun and
705 defmacro currently return the name of the newly defined function/macro
706 but this should not be relied upon.
709 ** `face-spec-set' no longer sets frame-specific attributes when the
710 third argument is a frame (that usage was obsolete since Emacs 22.2).
713 ** The arguments of `dbus-register-signal' are no longer just strings,
714 but keywords or keyword-string pairs. The old argument list will
715 still be supported for Emacs 24.x.
718 Some Lisp symbols have been renamed to avoid problems with spelling
719 that is incorrect or inconsistent with how Emacs normally spells a word.
721 *** Renamed functions
723 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
724 **** inactivate-input-method -> deactivate-input-method
725 **** quail-inactivate -> quail-deactivate
726 **** robin-inactivate -> robin-deactivate
727 **** viper-inactivate-input-method -> viper-deactivate-input-method
728 **** viper-inactivate-input-method-action ->
729 viper-deactivate-input-method-action
730 **** ucs-input-inactivate -> ucs-input-deactivate
733 The old hooks are still supported for backward compatibility, but they
734 are deprecated and will be removed eventually.
736 **** input-method-inactivate-hook -> input-method-deactivate-hook
737 **** robin-inactivate-hook -> robin-deactivate-hook
738 **** quail-inactivate-hook -> quail-deactivate-hook
740 *** Renamed Lisp variables
742 **** follow-deactive-menu -> follow-inactive-menu
743 **** inactivate-current-input-method-function ->
744 deactivate-current-input-method-function
746 ** Some obsolete functions, variables, and faces were removed:
748 *** `facemenu-unlisted-faces'
749 *** `rmail-decode-mime-charset'
750 *** `last-input-char', `last-command-char', `unread-command-char'.
751 *** `iswitchb-read-buffer'
752 *** `sc-version', `sc-submit-bug-report'
753 *** `set-char-table-default'
754 *** `string-to-sequence' (use `string-to-list' or `string-to-vector').
755 *** `compile-internal'
756 *** `mode-line-inverse-video'
757 *** `cvs-commit-buffer-require-final-newline'
758 (use `log-edit-require-final-newline' instead)
759 *** `cvs-changelog-full-paragraphs'
760 (use `log-edit-changelog-full-paragraphs' instead)
761 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
762 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
763 *** `vc-master-templates' (use `vc-handled-backends' instead)
764 *** `vc-checkout-carefully'
768 * Lisp changes in Emacs 24.3
770 ** New sampling-based Elisp profiler.
771 Try M-x profiler-start ... M-x profiler-stop; and then M-x profiler-report.
772 The sampling rate can be based on CPU time (only supported on some
773 systems), or based on memory allocations.
775 ** CL-style generalized variables are now in core Elisp.
776 `setf' is autoloaded; `push' and `pop' accept generalized variables.
779 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
780 The interpretation of the DECLS is determined by `defun-declarations-alist'.
784 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
785 of `read-regexp' accepts a string ending with a colon and space, and its
786 second argument DEFAULTS can be a list of strings accessible via M-n
787 in the minibuffer ahead of other hard-coded useful regexp-related values.
788 More commands use `read-regexp' now to read their regexp arguments.
792 *** New function `completion-table-with-quoting' to handle completion
793 in the presence of quoting, such as file completion in shell buffers.
795 *** New function `completion-table-subvert' to use an existing completion
796 table, but with a different prefix.
800 *** New error type and new function `user-error'.
801 These do not trigger the debugger.
803 *** New option `debugger-bury-or-kill'.
805 *** Set `debug-on-message' to enter the debugger when a certain
806 message is displayed in the echo area. This can be useful when trying
807 to work out which code is doing something.
809 *** New var `inhibit-debugger', automatically set to prevent accidental
810 recursive invocations.
814 *** The functions get-lru-window, get-mru-window and get-largest-window
815 now accept a third argument to avoid choosing the selected window.
817 *** Additional values recognized for option `window-combination-limit'.
819 *** New macro `with-temp-buffer-window'.
821 *** `temp-buffer-resize-mode' no longer resizes windows that have been
824 *** New function `fit-frame-to-buffer' and new options
825 `fit-frame-to-buffer' and `fit-frame-to-buffer-bottom-margin'.
827 *** New display action functions `display-buffer-below-selected',
828 `display-buffer-at-bottom' and `display-buffer-in-previous-window'.
830 *** New display action alist entry `inhibit-switch-frame', if non-nil,
831 tells display action functions to avoid changing which frame is
834 *** New display action alist entry `pop-up-frame-parameters', if
835 non-nil, specifies frame parameters to give any newly-created frame.
837 *** New display action alist entry `previous-window', if non-nil,
838 specifies window to reuse in `display-buffer-in-previous-window'.
840 *** New display action alist entries `window-height' and `window-width'
841 to specify size of new window created by `display-buffer'.
843 *** The following variables are obsolete, as they can be replaced by
844 appropriate entries in the `display-buffer-alist' function introduced
847 **** `display-buffer-reuse-frames'
848 **** `special-display-regexps'
849 **** `special-display-frame-alist'
850 **** `special-display-buffer-names'
851 **** `special-display-function'
852 **** `display-buffer-function'
853 **** `dired-shrink-to-fit'
857 *** `current-time-string' no longer requires that its argument's year
858 must be in the range 1000..9999. It now works with any year supported
859 by the underlying C implementation.
861 *** `current-time' now returns extended-format time stamps
862 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
863 PSEC is typically a multiple of 1000 on current machines. Other
864 functions that use this format, such as file-attributes and
865 format-time-string, have been changed accordingly. Old-format time
866 stamps are still accepted.
868 *** The format of timers in timer-list and timer-idle-list is now
869 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
870 The PSECS slot is new, and uses picosecond resolution. It can be
871 accessed via the new timer--psecs accessor.
873 *** Last-modified time stamps in undo lists now are of the form
874 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
877 ** Floating point functions now always return special values like NaN,
878 instead of signaling errors, if given invalid args, e.g. (log -1.0).
879 Previously, they returned NaNs on some platforms but signaled errors
880 on others. The affected functions are acos, asin, tan, exp, expt,
881 log, log10, sqrt, and mod.
883 ** Interpreted files are eagerly macro-expanded during load.
884 This can significantly speed up execution of non-byte-compiled code,
885 but can also bump into harmless and previously unnoticed cyclic
886 dependencies. These should not be fatal: they will simply cause the
887 macro-calls to be left for later expansion (as before), but will also
888 result in a warning ("Eager macro-expansion skipped due to cycle")
889 describing the cycle.
891 ** Miscellaneous new functions:
894 *** `autoload-do-load'
896 *** `buffer-narrowed-p' tests if the buffer is narrowed.
897 *** `file-name-base' returns a file name sans directory and extension.
898 *** `function-get' fetches a function property, following aliases.
900 *** `posnp' tests if an object is a `posn'.
901 *** `set-temporary-overlay-map' sets up a temporary overlay map.
903 *** `system-users' returns the user names on the system.
905 *** `system-groups' returns the group names on the system.
906 *** `tty-top-frame' returns the topmost frame of a text terminal.
908 ** New macros `setq-local' and `defvar-local'.
910 ** New fringe bitmap `exclamation-mark'.
912 ** Face underlining can now use a wave.
913 See the "Face Attributes" section of the Elisp manual.
915 ** The following functions and variables are obsolete:
917 *** `automount-dir-prefix'
918 *** `buffer-has-markers-at'
919 *** `macro-declaration-function' (use `macro-declarations-alist')
920 *** `window-system-version'
921 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
922 *** `query-replace-interactive'
923 *** `font-list-limit' (has had no effect since Emacs < 23)
926 * Changes in Emacs 24.3 on non-free operating systems
929 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
930 support for libxml2, even if its presence is detected.
932 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
933 Emacs now supports mouse highlight, help-echo (in the echo area), and
934 `mouse-autoselect-window'.
936 ** Two new functions are available in Cygwin builds:
937 `cygwin-convert-path-from-windows' and `cygwin-convert-path-to-windows'.
938 These functions allow Lisp code to access the Cygwin file-name mapping
939 machinery to convert between Cygwin and Windows-native file names.
941 ** On MS Windows Vista and later Emacs now supports symbolic links.
943 * Changes in Emacs 24.2
945 ** This is mainly a bug-fix release.
948 * Installation Changes in Emacs 24.1
950 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
951 to configure. Note that other libraries used by Emacs, RSVG and GConf,
952 also depend on Gtk+. You can disable them with --without-rsvg and
955 ** Emacs can be compiled with GnuTLS support.
956 This happens by default if a suitably recent version of the library is
957 found at build time. To prevent this, use the configure option
958 `--without-gnutls'. See below for GnuTLS features.
960 ** Emacs can be compiled with SELinux support.
961 This happens by default if a suitably recent version of the library is
962 found at build time. To prevent this, use the configure option
963 `--without-selinux'. See below for SELinux features.
965 ** Emacs can be compiled with ImageMagick support.
966 This happens by default if a suitably recent version of the library is
967 found at build time. To prevent this, use the configure option
968 `--without-imagemagick'. See below for ImageMagick features.
969 This feature is not available for the Nextstep or MS ports.
971 ** Emacs can be compiled with libxml2 support.
972 This happens by default if a suitably recent version of the library is
973 found at build time. To prevent this, use the configure option
974 `--without-xml2'. See below for libxml2 features.
976 ** By default, the installed Info and man pages are compressed.
977 You can disable this by configuring --without-compress-info.
979 ** New configure option --with-wide-int.
980 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
981 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
984 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
985 These provide no new functionality, they just remove the need to edit
986 lib-src/Makefile by hand in order to use the associated features.
988 ** New configure option --enable-use-lisp-union-type.
989 This is only useful for Emacs developers to debug certain types of bugs.
990 This is not a new feature; only the configure flag is new.
992 ** The standalone programs digest-doc and sorted-doc are removed.
993 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
995 ** The standalone program `fakemail' is removed.
996 If you need it, feedmail.el provides a superset of the functionality.
999 * Startup Changes in Emacs 24.1
1001 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1002 command line arguments, and the EMACS_UNIBYTE environment variable, no
1003 longer have any effect. (They were declared obsolete in Emacs 23.)
1005 ** New command line option `--no-site-lisp' removes site-lisp directories
1006 from load-path. -Q now implies this. This option does not affect the
1007 EMACSLOADPATH environment variable (and hence has no effect for
1011 * Changes in Emacs 24.1
1015 *** Many packages now use the `completion-at-point' command,
1016 rather than implementing separate completion commands.
1018 *** `completion-at-point' now handles tags and semantic completion.
1020 *** Completion in a non-minibuffer now tries to detect the end of completion
1021 and pops down the *Completions* buffer accordingly.
1023 *** New option `completion-cycle-threshold' allows completion cycling.
1025 *** New option `completion-category-overrides' for overriding the
1026 default completion style in certain circumstances.
1028 *** New completion style `substring'.
1030 *** Completion of buffer names uses `substring' completion by default.
1032 *** The option `widget-complete-field' has been removed.
1036 *** The first time you try sending mail, Emacs asks for a mail method.
1037 This is implemented by a new default for `send-mail-function', which
1038 is `sendmail-query-once'. This offers to use the smtpmail package, or
1039 to use the old defaults relying on external mail facilities
1040 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1041 `mailclient-send-it' on Windows).
1043 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1044 the report to your desktop's preferred mail client, if there is one.
1045 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1047 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1048 and Mail mode changes
1050 ** Emacs server and client changes
1052 *** New option `server-port' specifies the port for TCP Emacs servers.
1054 *** New emacsclient argument -q/--quiet suppresses some status messages.
1056 *** New emacsclient argument --frame-parameters specifies the frame
1057 parameters of any newly-created graphical frame.
1059 *** If emacsclient shuts down due to Emacs signaling an error,
1060 its exit status is 1.
1062 *** New emacsclient argument --parent-id ID.
1063 This opens a client frame in parent X window ID, via XEmbed, similar
1064 to the --parent-id argument to Emacs.
1066 ** Internationalization changes
1068 *** Emacs now supports display and editing of bidirectional text.
1069 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1070 displayed in the correct visual order as expected by users of those
1071 scripts. The display reordering is a "full bidirectionality" class
1072 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1073 with no RTL text should look exactly the same as before.
1075 **** New buffer-local variable `bidi-display-reordering'.
1076 To disable display reordering in a buffer, change this to nil.
1078 **** New buffer-local variable `bidi-paragraph-direction'.
1079 If nil (the default), Emacs determines the base direction of each
1080 paragraph from its text, as specified by the UBA. Setting the value
1081 to `right-to-left' or `left-to-right' forces a base direction on each
1084 Paragraphs with right-to-left base direction are displayed starting at
1085 the right window edge.
1087 *** Enhanced support for characters with no glyphs in available fonts,
1088 or, on text terminals, characters that cannot be encoded by the
1089 terminal coding system. The new option `glyphless-char-display-control'
1090 specifies how to display them: as a hexadecimal code in a box, a thin
1091 1-pixel space, an empty box, etc.
1093 *** New input methods for Farsi and Bulgarian
1094 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1096 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1097 (U+2010 and U+2011).
1099 *** New Hebrew translation of the Emacs Tutorial.
1100 Type `C-u C-h t' to choose it in case your language setup doesn't
1101 automatically select it.
1103 ** An Emacs Lisp package manager is now included.
1104 This is a convenient way to download and install additional packages,
1105 from a package repository at http://elpa.gnu.org.
1107 *** M-x list-packages shows a list of packages, which can be
1108 selected for installation.
1110 *** New command `describe-package', bound to `C-h P'.
1112 *** By default, all installed packages are loaded automatically when
1113 Emacs starts up. To disable this, set `package-enable-at-startup' to
1114 nil. To specify the packages to load, customize `package-load-list'.
1116 ** Custom theme changes
1118 *** New command `M-x customize-themes', which provides a convenient
1119 interface for enabling and disabling Custom themes.
1121 *** New option `custom-theme-load-path' is the load path for themes.
1122 Emacs no longer looks for Custom themes in `load-path'. The default
1123 value of `custom-theme-load-path' says to look for themes in
1124 `custom-theme-directory', followed by a subdirectory of
1125 `data-directory' named "themes/", which contains a small selection of
1126 built-in Custom themes.
1128 *** New option `custom-safe-themes' records known-safe theme files.
1129 If a theme is not in this list, Emacs queries before loading it, and
1130 offers to save the theme to `custom-safe-themes' automatically. By
1131 default, all themes included in Emacs are treated as safe.
1133 ** Improved GTK integration
1135 *** GTK scroll-bars are now placed on the right by default.
1136 The function `set-scroll-bar-mode' can change this.
1138 *** GTK tool bars can have just text, just images or images and text.
1139 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1140 the default is taken from desktop settings.
1142 *** GTK tool bars can be placed on any edge of the frame.
1143 The frame-parameter tool-bar-position controls this. It takes the
1144 values top, left, right or bottom. The Options => Show/Hide menu has
1147 *** The default colors for selected text (the `region' face) are taken
1148 from the GTK theme when Emacs is built with GTK.
1150 *** Emacs uses GTK tooltips by default if built with GTK.
1151 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1153 ** Graphical interface changes
1155 *** On graphical displays, the mode-line no longer ends in dashes.
1156 Also, the first dash (which does not indicate anything) is just
1157 displayed as a space.
1159 *** `menu-bar-select-buffer-function' lets you choose another operation
1160 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1162 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1163 built with Xft. These fonts can be set via X resources, for example:
1164 Emacs.pane.menubar.font: Courier-12
1168 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1169 or if it receives a SIGINT signal in batch mode.
1171 *** `kill-emacs-hook' is now also run in batch mode.
1172 Third-party code which adds to `kill-emacs-hook' should check if they
1173 do the right thing in batch mode.
1175 ** Scrolling changes
1177 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1178 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1179 of buffer at first key-press (instead they move to top/bottom of buffer)
1180 when `scroll-error-top-bottom' is non-nil.
1182 *** New option `scroll-error-top-bottom' (see above).
1184 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1185 scroll a line instead of full screen.
1187 *** New property `scroll-command' should be set on a command's symbol to
1188 define it as a scroll command affected by `scroll-preserve-screen-position'.
1190 *** If you customize `scroll-conservatively' to a value greater than 100,
1191 Emacs will never recenter point in the window when it scrolls due to
1192 cursor motion commands or commands that move point (e.f., `M-g M-g').
1193 Previously, you needed to use `most-positive-fixnum' as the value of
1194 `scroll-conservatively' to achieve the same effect.
1196 *** "Aggressive" scrolling now honors the scroll margins.
1197 If you customize `scroll-up-aggressively' or
1198 `scroll-down-aggressively' and move point off the window, Emacs now
1199 scrolls the window so as to avoid positioning point inside the scroll
1202 ** Basic SELinux support has been added.
1203 This requires Emacs to be linked with libselinux at build time.
1205 *** Emacs preserves the SELinux file context when backing up.
1206 Also, the function `copy-file' has an extra optional argument for
1207 preserving SELinux context, and the return value of `backup-buffer'
1208 now includes the SELinux context.
1210 *** New functions `file-selinux-context' and `set-file-selinux-context'
1211 get and set the SELinux context of a file.
1215 *** `delete-by-moving-to-trash' now only affects commands that specify
1216 trashing. This avoids inadvertently trashing temporary files.
1218 *** Calling `delete-file' or `delete-directory' with a prefix argument
1219 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1221 ** File- and directory-local variable changes
1223 *** You can stop directory local vars from applying to subdirectories.
1224 Add an element (subdirs . nil) to the alist portion of any variables
1225 settings to indicate that the section should not apply to
1228 *** Directory local variables can apply to some file-less buffers.
1229 Affected modes include dired, vc-dir, and log-edit. For example,
1230 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1231 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1232 `hack-dir-local-variables-non-file-buffer' to support this.
1234 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1235 Instead, use "eval: (minor-mode 1)".
1237 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1238 to `inhibit-local-variables-regexps'. As the name suggests, it now
1239 applies to ALL file local variables, not just -*- lines. The
1240 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1245 *** The `quit-window' command now restores the last buffer displayed
1246 in the quitted window.
1248 *** Resizing an Emacs frame now preserves proportional window sizes,
1249 modulo restrictions like window minimum sizes and fixed-size windows.
1251 *** The behavior of `display-buffer' is now customizable in detail.
1253 **** New option `display-buffer-base-action' specifies a list of
1254 user-determined display "actions" (functions and optional arguments
1255 for choosing the displaying window).
1257 This takes precedence over the default display action, which is
1258 specified by `display-buffer-fallback-action'.
1260 **** New option `display-buffer-alist' maps buffer name regexps to
1261 display actions, taking precedence over `display-buffer-base-action'.
1263 *** New option `window-combination-limit'.
1264 The new option `window-combination-limit' allows to return the space
1265 obtained for resizing or creating a window more reliably to the window
1266 from which such space was obtained.
1268 *** New option `window-combination-resize'.
1269 The new option `window-combination-resize' allows to split a window that
1270 otherwise cannot be split because it's too small by stealing space from
1271 other windows in the same combination. Subsequent resizing or deletion
1272 of the window will resize all windows in the same combination as well.
1274 *** New option `frame-auto-hide-function' lets you choose between
1275 iconifying or deleting a frame when burying a buffer in a dedicated
1276 frame, or quitting a window showing a buffer in a frame of its own.
1278 *** New commands `maximize-window' and `minimize-window'.
1279 These maximize and minimize the size of a window within its frame.
1281 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1282 These functions allow to navigate through the live buffers that have
1283 been shown in a specific window.
1285 ** Minibuffer changes
1287 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1288 This is handy for minibuffer-only frames, and is also used for the feature
1289 where mouse-1 pops up *Messages*"', which can now easily be changed.
1291 *** Minibuffers set `truncate-lines' to nil.
1292 If you want to change the value to something else, you could use
1293 for example `minibuffer-setup-hook'.
1295 ** `auto-mode-case-fold' is now enabled by default.
1297 ** `backup-by-copying-when-mismatch' now defaults to t.
1299 ** New basic faces `error', `warning', `success'.
1300 These are used to highlight text indicating failure, caution or
1301 successful operation.
1303 ** New option `list-colors-sort' defines the color sort order
1304 for `list-colors-display'.
1306 ** The variable `focus-follows-mouse' now always defaults to nil.
1309 * Editing Changes in Emacs 24.1
1313 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1314 `isearch-yank-line'.
1316 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1317 `isearch-yank-kill'.
1319 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1321 ** New commands `count-words-region' and `count-words'.
1323 *** M-= is bound to `count-words-region', not `count-lines-region'.
1324 The `count-words-region' command, when called interactively, reports
1325 the number of lines, words, and characters in the region. It is a
1326 superset of the old `count-lines-region', which is now an obsolete
1329 ** The command `just-one-space' (M-SPC), if given a negative argument,
1330 also deletes newlines around point.
1334 *** New option `delete-active-region'.
1335 If non-nil, [delete] and DEL delete the region if it is active and no
1336 prefix argument is given. If set to `kill', those commands kill
1339 *** New command `delete-forward-char', bound to [delete].
1340 This is meant for interactive use, and obeys `delete-active-region'.
1341 The command `delete-char' does not obey `delete-active-region'.
1343 *** `delete-backward-char' is now a Lisp function.
1344 Apart from obeying `delete-active-region', its behavior is unchanged.
1345 However, the byte compiler now warns if it is called from Lisp; Lisp
1346 callers should use delete-char with a negative argument instead.
1348 *** The option `mouse-region-delete-keys' has been deleted.
1350 ** Selection changes.
1352 The default handling of clipboard and primary selections has been
1353 changed to conform with modern X applications. In short, most
1354 commands for killing and yanking text now use the clipboard, while
1355 mouse commands use the primary selection.
1357 In the following, we provide a list of these changes, followed by a
1358 list of steps to get the old behavior back if you prefer that.
1360 *** `select-active-regions' now defaults to t.
1361 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1362 the kill ring. The selected text is put in the primary selection, if
1363 the system possesses a separate primary selection facility (e.g. X).
1365 **** `select-active-regions' also accepts a new value, `only'.
1366 This means to only set the primary selection for temporarily active
1367 regions (usually made by mouse-dragging or shift-selection);
1368 "ordinary" active regions, such as those made with C-SPC followed by
1369 point motion, do not alter the primary selection.
1371 **** `mouse-drag-copy-region' now defaults to nil.
1373 *** mouse-2 is now bound to `mouse-yank-primary'.
1374 This pastes from the primary selection, ignoring the kill-ring.
1375 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1377 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1379 *** `x-select-enable-primary' now defaults to nil.
1380 Thus, commands that kill text or copy it to the kill-ring (such as
1381 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1383 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1384 exactly equivalent to M-w, C-w, and C-y respectively.
1386 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1387 non-nil by default, as Windows does not support the primary selection
1388 between applications.
1390 *** To return to the previous behavior, do the following:
1392 **** Change `select-active-regions' to nil.
1393 **** Change `mouse-drag-copy-region' to t.
1394 **** Change `x-select-enable-primary' to t (on X only).
1395 **** Change `x-select-enable-clipboard' to nil.
1396 **** Bind `mouse-yank-at-click' to mouse-2.
1398 *** Support for X cut buffers has been removed.
1400 *** X clipboard managers are now supported.
1401 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1403 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1404 in the current rectangle. With a prefix argument, this prompts for a
1405 number to count from and for a format string.
1407 ** `redisplay-dont-pause' now defaults to t.
1408 This makes Emacs feel more responsive to editing commands that arrive
1409 at high rate, e.g. if you lean on some key, because stopping redisplay
1410 in the middle (when this variable is nil) forces more expensive
1411 updates later on, and Emacs appears to be unable to keep up.
1413 ** The behavior of <TAB> for active regions in Text mode has changed.
1414 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1415 when the region is active causes Emacs to indent all the lines in the
1416 region, aligning them with the line previous to the first line in the
1417 region (or with the left margin if there is no previous line).
1419 ** When `occur' is called with a prefix argument, matching strings are
1420 collected into the `*Occur*' buffer without line numbers. If there
1421 are parenthesized subexpressions in the specified regexp, `occur'
1422 reads replacement text that may contain \\& and \\N whose convention
1423 follows `replace-match'.
1426 * Changes in Specialized Modes and Packages in Emacs 24.1
1428 ** Archive Mode has basic support for browsing and updating 7z archives.
1432 *** BibTeX mode now supports biblatex.
1433 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1434 `bibtex-entry-field-alist' is now an obsolete alias for
1435 `bibtex-BibTeX-entry-alist'.
1437 *** New command `bibtex-search-entries', bound to C-c C-a.
1439 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1441 *** New variable `bibtex-search-entry-globally'.
1445 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1447 *** The default browser used by the package is now the "xdg-open" program,
1448 on platforms that support it. This calls your desktop's preferred browser.
1450 ** Calendar, Diary, and Appt
1452 *** Diary entries can contain non-printing "comments".
1453 See the variable `diary-comment-start'.
1455 *** Appointments can specify their individual warning times.
1456 See the variable `appt-warning-time-regexp'.
1458 *** The function specified by `appt-disp-window-function' may be passed
1459 lists of arguments if multiple appointments are due at similar times.
1460 If you are using a custom function for this, you should update it.
1462 *** New function `diary-hebrew-birthday'.
1464 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1465 may no longer be nil, but must all be strings.
1467 *** The obsolete (since Emacs 22.1) method of enabling the appt
1468 package by adding `appt-make-list' to `diary-hook' has been removed.
1469 Use `appt-activate' instead.
1471 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1472 appt-issue-message (use the function appt-activate)
1473 appt-visible/appt-msg-window (use the variable appt-display-format)
1475 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1476 view-diary-entries, list-diary-entries, show-all-diary-entries
1480 *** New feature to "guess" the style in an existing buffer.
1481 The main entry point is M-x c-guess.
1483 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1485 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1486 Thus C-M-a will, by default, go to the beginning of the immediate function,
1489 *** "Macros with semicolons" can be registered for correct indentation.
1490 Where such a macro ends a line (no semicolon) the next statement is no longer
1491 parsed as a statement continuation.
1493 ** Comint and modes derived from it use the standard completion code.
1497 *** Compilation mode can be used without Font Lock mode.
1498 `compilation-parse-errors-function' is now obsolete.
1500 *** New variable `compilation-filter-start', which is bound while
1501 `compilation-filter-hook' runs. It records the start position of the
1502 text inserted by `compilation-filter'.
1504 *** `compilation-error-screen-columns' and `compilation-first-column'
1505 are obeyed in the editing buffer. So programming language modes can
1506 set them, whereas previously only the value in the *Compilation*
1511 *** Customize buffers now contain a search field.
1512 The search is performed using `customize-apropos'.
1513 To turn off the search field, set `custom-search-field' to nil.
1515 *** Options in customize group buffers start out hidden if not customized.
1516 Use the arrow to the left of the option name to toggle visibility.
1518 *** custom-buffer-sort-alphabetically now defaults to t.
1520 *** The color widget now has a "Choose" button, which allows you to
1521 choose a color via `list-colors-display'.
1525 *** It is now possible to access buses other than the default system
1528 *** The `dbus-register-method' and `dbus-register-property' functions
1529 optionally do not register names.
1531 *** The new function `dbus-register-service' registers a known service
1532 name on a D-Bus without also registering a property or a method.
1536 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1537 if called with a prefix argument, read a file name from the minibuffer
1538 instead of using the current buffer.
1540 *** The "dired local variables" feature of Dired-x is obsolete.
1541 The standard directory local variables feature replaces it.
1545 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1546 controlling attempts to autojoin a channel.
1548 *** New variable `erc-coding-system-precedence': If we use `undecided'
1549 as the server coding system, this variable will then be consulted.
1550 The default is to decode strings that can be decoded as utf-8 as
1551 utf-8, and do the normal `undecided' decoding for the rest.
1555 *** The default value of `eshell-directory-name' has changed
1556 to be an "eshell" directory in `user-emacs-directory'.
1557 The old "~/.eshell/" directory is still used if it exists, though.
1561 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1562 It now supports multithread non-stop debugging and simultaneous
1563 debugging of several threads.
1567 *** RET (`image-toggle-animation') toggles animation, if applicable.
1568 Animation plays once, unless the option `image-animate-loop' is non-nil.
1572 *** New command M-x info-display-manual displays a named Info manual.
1573 If that manual is already visited in some Info buffer, it displays
1574 that buffer. (This is handy if you have many manuals in many *info*
1575 buffers, and don't remember the name of the buffer visiting the manual
1576 you want to consult.) Otherwise, it loads and displays the manual.
1578 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1579 This is for compatibility with the stand-alone Info reader program,
1580 and also because `Info-edit' is a rarely used command that is disabled
1583 ** Mail mode changes (not Message mode)
1585 *** New command M-x mail-add-attachment for adding MIME attachments
1587 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1588 (Its name is misleading, since it has nothing to do with MIME
1589 attachments.) The old name is now an obsolete alias to the new name.
1591 ** MH-E has been updated to MH-E version 8.3.1.
1592 See MH-E-NEWS for details.
1594 ** Modula-2 mode provides auto-indentation.
1596 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1598 ** nXML mode no longer binds C-RET to `nxml-complete'.
1599 Completion is now performed via `completion-at-point', bound to C-M-i
1600 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1601 default), this performs tag completion.
1603 ** Org mode has been updated to version 7.8.09.
1604 See ORG-NEWS for details.
1606 ** Prolog mode has been completely revamped, with lots of additional
1607 functionality such as more intelligent indentation, electricity,
1608 support for more variants, including Mercury, and a lot more.
1612 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1613 in the Rmail incoming message.
1615 *** The variable `rmail-message-filter' no longer has any effect.
1616 This change was made in Emacs 23.1 but was not advertised at the time.
1617 Try using `rmail-show-message-hook' instead.
1621 *** M-x shell prompts for the shell path name if the default directory
1622 is a remote file name and neither the environment variable $ESHELL nor
1623 the variable `explicit-shell-file-name' is set.
1625 *** TAB is now bound to the standard `completion-at-point' command,
1626 which now implements the pcomplete rules for shell command completion.
1630 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1631 if the mail server supports them. This uses either built-in GnuTLS
1632 support, or the starttls.el library. Customize `smtpmail-stream-type'
1635 *** The variable `smtpmail-auth-credentials' has been removed.
1636 By default, the information is now stored in the file ~/.authinfo.
1637 This was the default value of smtpmail-auth-credentials. If you had
1638 customized smtpmail-auth-credentials to a list of user names and
1639 passwords, those settings are not used. During your first connection
1640 to the smtp server, Emacs will prompt for the user name and password,
1641 and offer to save them to ~/.authinfo. Or you can manually copy the
1642 credentials to ~/.authinfo. For example, if you had
1644 (setq smtpmail-auth-credentials
1645 '(("mail.example.org" 25 "jim" "s!cret")))
1647 then the equivalent line in ~/.authinfo would be
1649 machine mail.example.org port 25 login jim password s!cret
1651 See the auth-source manual for more information, e.g. on encrypting
1652 the credentials file.
1654 *** The variable `smtpmail-starttls-credentials' has been removed.
1655 If you had that set, you need to put
1657 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1659 in your ~/.authinfo file instead.
1661 *** SMTPmail defaults to using the address in the From: header as the
1662 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1663 to the address you wish to use instead.
1667 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1668 and `sql-oracle-scan-on'.
1670 *** New options controlling prompting for login parameters.
1671 Each supported product has a custom variable `sql-*-login-params',
1672 which is a list of the parameters to be prompted for before a
1673 connection is established.
1675 *** The command `sql-product-interactive' now takes a prefix argument,
1676 which causes it to prompt for an SQL product.
1678 *** Product-specific SQL interactive commands now take prefix arguments.
1679 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1680 given a prefix argument, prompt for a name for the SQL interactive
1681 buffer. This reduces the need for calling `sql-rename-buffer'.
1683 *** SQL interactive modes suppress command continuation prompts, and
1684 replace tabs with spaces. The first change impacts multiple line SQL
1685 statements entered with C-j between each line, statements yanked into
1686 the buffer and statements sent with `sql-send-*' functions. The
1687 second prevents the MySQL and Postgres interpreters from listing
1688 object name completions when sent text via `sql-send-*' functions.
1690 *** New command `sql-connect' starts a predefined SQLi session,
1691 using the login parameters from `sql-connection-alist'.
1693 *** New "Save Connection" menu item in SQLi buffers.
1694 This gathers the login params specified for the SQLi session, if it
1695 was not started by a connection, and saves them as a new connection.
1697 *** New commands for listing database objects and details:
1698 sql-list-all and sql-list-table.
1700 *** An API for manipulating SQL product definitions has been added.
1704 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1708 *** New inline access method "ksu" (kerberized su).
1710 *** The following access methods are discontinued: "ssh1_old",
1711 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1713 *** The user option `remote-file-name-inhibit-cache' controls whether
1714 remote file attributes are cached for better performance.
1716 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1717 default value to "".
1719 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1720 for remote machines which support SELinux.
1722 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1723 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1724 the degree of parallelism.
1726 ** VC and related modes
1728 *** Support for pulling on distributed version control systems.
1729 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1730 supported (currently with Bzr, Git, and Mercurial), to update the
1731 current branch and working tree. A prefix argument means to prompt
1732 the user for specifics, e.g. a pull location.
1734 *** `vc-update' is now an alias for `vc-pull'.
1736 *** Support for merging on distributed version control systems.
1737 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1738 is supported (currently with Bzr, Git, and Mercurial), to merge
1739 changes from another branch into the current one. It prompts for
1740 specifics, e.g. a merge source.
1742 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1743 shows a diff while querying the user. It defaults to t.
1745 *** Log entries in some Log View buffers can be toggled to display a
1746 longer description by typing RET (log-view-toggle-entry-display).
1747 This is currently supported for Bzr, Git, and Mercurial (to support
1748 another backend, define a `log-view-expanded-log-entry-function').
1749 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1750 use this to display the full log entry for the revision at point.
1752 *** New command `vc-ediff' allows visual comparison of two revisions
1753 of a file similar to `vc-diff', but using ediff backend.
1755 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1756 this was not advertised at the time.
1758 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1759 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1760 this was not advertised at the time.
1766 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1768 *** partial-completion-mode (complete.el) is obsolete.
1769 You can get a comparable behavior with:
1770 (setq completion-styles '(partial-completion initials))
1771 (setq completion-pcm-complete-word-inserts-delimiters t)
1773 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1775 *** pgg is obsolete (use EasyPG instead).
1777 *** sregex.el is obsolete, since rx.el is a strict superset.
1779 *** s-region.el and pc-select.el are obsolete.
1780 They are superseded by shift-select-mode, enabled by default since 23.1.
1782 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1786 *** The Landmark game is now invoked with `landmark', not `lm'.
1787 Its functions and variables have been similarly renamed.
1789 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1790 (This interfered with cua-mode.)
1792 *** f90.el has some support for Fortran 2008 syntax.
1794 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1796 *** New command `nato-region' converts text to NATO phonetic alphabet.
1799 * New Modes and Packages in Emacs 24.1
1801 ** Occur Edit mode applies edits made in *Occur* buffers to the
1802 original buffers. It is bound to "e" in Occur mode.
1804 ** New global minor mode electric-pair-mode.
1805 When enabled, typing an open parenthesis automatically inserts the
1806 matching closing one.
1808 ** New global minor mode electric-indent-mode.
1809 When enabled, typing certain characters triggers reindentation.
1810 Major modes wishing to use this can set electric-indent-chars or
1811 electric-indent-functions.
1813 ** New global minor mode electric-layout-mode.
1814 When enabled, typing certain characters automatically inserts newlines.
1815 Major modes wishing to use this can set electric-layout-rules.
1817 ** tabulated-list.el provides a generic major mode for tabulated data,
1818 from which other modes can be derived.
1820 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1822 ** secrets.el is an implementation of the Secret Service API, an
1823 interface to password managers like GNOME Keyring or KDE Wallet. The
1824 Secret Service API requires D-Bus for communication. The command
1825 `secrets-show-secrets' offers a buffer with a visualization of the
1828 ** notifications.el provides an implementation of the Desktop
1829 Notifications API. It requires D-Bus for communication.
1831 ** soap-client.el supports access to SOAP web services from Emacs.
1832 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1834 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1836 ** New emacs-lock.el package.
1837 The previous version has been moved to obsolete/old-emacs-lock.el.
1838 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1839 against exiting Emacs and killing the buffer can be set separately.
1840 The mechanism for automatically turning off protection for buffers
1841 with dead inferior processes has been generalized.
1844 * Incompatible Lisp Changes in Emacs 24.1
1846 ** Passing a nil argument to a minor mode function call now ENABLES
1847 the minor mode unconditionally. This is so that you can write e.g.
1849 (add-hook 'text-mode-hook 'foo-mode)
1851 to enable foo-mode in Text mode buffers, removing the need for
1852 `turn-on-foo-mode' style functions. This affects all mode commands
1853 defined by `define-minor-mode'. If called interactively, the mode
1854 command still toggles the minor mode.
1856 ** The return value of `backup-buffer' has changed.
1857 It is now a list of three elements, where the second element is a list
1858 describing the original file's SELinux context. If Emacs or the
1859 system lacks SELinux support, the context list is (nil nil nil nil).
1860 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1862 ** `char-direction-table' and the `char-direction' function were deleted.
1863 They were buggy and inferior to the new support of bidirectional
1864 editing introduced in Emacs 24. If you need the bidirectional
1865 properties of a character, use `get-char-code-property' with the last
1866 argument `bidi-class'.
1868 ** `copy-directory' now copies the source directory as a subdirectory
1869 of the target directory, if the latter is an existing directory. The
1870 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1871 the contents directly into a pre-existing target directory.
1873 ** For mouse click input events in the text area, the Y pixel
1874 coordinate in the POSITION list now counts from the top of the text
1875 area, excluding any header line. Previously, it counted from the top
1878 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1879 been further reduced. Now a backquote not followed by a space is
1880 always treated as a "new-style" backquote. Please remove all
1881 "old-style" backquotes from your code. If your code uses backquotes
1882 as documented in the Elisp manual, and compiles without warning, then
1883 you have nothing to do in this regard. Code not following the
1884 appropriate conventions may fail to compile.
1886 The most common cause of trouble seems to be an old-style backquote
1887 followed by a newline. Another cause of trouble is vector notation
1888 for key sequence notation: instead of [(control ,)] and [(control ')],
1889 you should write [(control ?,)] and [(control ?')], which will work in
1892 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1893 was not advertised at the time. The function `custom-initialize-delay'
1894 replaced all known uses.
1896 ** `view-buffer' now treats special mode-class in the same way that
1897 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1898 major mode is special).
1900 ** Menu and tool bar changes
1902 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1903 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1904 With these alist entries omitted, `make-frame' checks the value of the
1905 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1906 a menu-bar or tool-bar, respectively. If the alist entries are added,
1907 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1909 *** The menu bar bindings's caches are not used any more.
1910 Use (where-is-internal <def> nil t) instead.
1912 ** Regions created by mouse dragging are now normal active regions,
1913 similar to those created by shift-selection (see Selection changes
1914 above). In previous Emacs versions, these regions were delineated by
1915 `mouse-drag-overlay'; that variable has been removed.
1917 ** The fourth argument of `filter-buffer-substring' has been removed.
1918 If you want to remove text properties from the final result, simply
1919 pass the result through substring-no-properties.
1921 ** cl.el no longer provides `cl-19'.
1923 ** The following obsolete functions and aliases have been removed
1924 (the appropriate new function is given in parentheses; "not needed"
1925 means you can just remove all calls to the function in question):
1927 *** `comint-kill-output' (`comint-delete-output')
1928 *** `decompose-composite-char' (`char-to-string')
1929 *** `outline-visible' (`outline-invisible-p')
1930 *** `internal-find-face' (`facep')
1931 *** `internal-get-face' (`facep and check-face')
1932 *** `frame-update-faces' (not needed)
1933 *** `frame-update-face-colors' (`frame-set-background-mode')
1934 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1935 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1936 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1937 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1938 *** `x-make-font-unbold' (`make-face-unbold')
1939 *** `x-make-font-unitalic' (`make-face-unitalic')
1940 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1941 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1942 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1943 *** `char-bytes' (== 1)
1944 *** `isearch-return-char' (`isearch-printing-char')
1945 *** `make-local-hook' (not needed)
1946 *** `set-screen-height' (`set-frame-height')
1947 *** `set-screen-width' (`set-frame-width')
1949 ** The following obsolete variables and varaliases have been removed
1950 (the appropriate new variable is given in parentheses):
1952 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1953 *** `vc-header-alist' (`vc-BACKEND-header')
1954 *** `directory-sep-char' (== ?/)
1955 *** `font-lock-defaults-alist' (`font-lock-defaults')
1956 *** `e' (`float-e').
1958 ** The following obsolete files were removed:
1959 sc.el, x-menu.el, rnews.el, rnewspost.el
1961 ** The format of the finder-inf.el file has changed, since the Finder
1962 mechanism is now based on the package system. The variable
1963 `finder-package-info' is replaced by `package--builtins' and
1964 `finder-keywords-hash'.
1966 ** When generating autoloads, `update-directory-autoloads' no longer
1967 assumes every inspected file is in your `load-path'. It instead
1968 generates relative names according to the current `load-path'.
1971 * Lisp changes in Emacs 24.1
1973 ** Code can now use lexical scoping by default instead of dynamic scoping.
1974 The `lexical-binding' variable enables lexical scoping for local
1975 variables. It is typically set via a file-local variable in the first
1976 line of the file, in which case it applies to all the code in that
1979 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1980 binding instead of the old dynamic binding mode.
1982 *** Lexically scoped interpreted functions are represented with a new form
1983 of function value which looks like (closure ENV ARGS &rest BODY).
1985 *** New macro `letrec' to define recursive local functions.
1987 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1988 So do `defcustom' and other forms that call `defvar' as a subroutine.
1990 *** New function `special-variable-p' to check whether a variable is
1991 declared as dynamically bound.
1993 *** The form ((lambda ...) ...) is deprecated.
1995 ** An Emacs Lisp testing tool is now included.
1996 Emacs Lisp developers can use this tool to write automated tests for
1997 their code. See the ERT info manual for details.
1999 ** Changes for bidirectional display and editing
2001 *** New function `current-bidi-paragraph-direction'.
2002 This returns the base direction of the paragraph at point.
2004 *** New function `bidi-string-mark-left-to-right'.
2005 Given a string containing characters from right-to-left scripts, this
2006 function returns another string which can be safely inserted into a
2007 buffer, such that any following text will be always displayed to the
2008 right of that string. (This works by appending an invisible Unicode
2009 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2011 This is useful when the buffer has overall left-to-right paragraph
2012 direction and you need to insert a string whose contents are not known
2013 in advance, without disrupting the layout of the line.
2017 *** Window tree functions are accessible in Elisp.
2018 Functions are provided to return the parent, siblings or child windows
2019 of any window including internal windows (windows not associated with a
2020 buffer) in the window tree.
2022 **** New function `window-valid-p' gives non-nil for live and internal
2025 **** Window manipulation can deal with internal windows.
2026 Many window handling functions like `split-window', `delete-window', or
2027 `delete-other-windows' as well as the window resizing functions can now
2028 act on any window including internal ones.
2030 *** window-total-height/-width vs window-body-height/-width.
2031 The function `window-height' has been renamed to `window-total-height'
2032 and `window-width' has been renamed to `window-body-width'. The old
2033 names are provided as aliases. Two new functions `window-total-width'
2034 and `window-body-height' are provided.
2036 *** Window parameters specific to window handling functions.
2037 For each window you can specify a parameter to override the default
2038 behavior of a number of functions like `split-window', `delete-window'
2039 and `delete-other-windows'. The variable `ignore-window-parameters'
2040 allows to ignore processing such parameters.
2042 *** New semantics of third argument of `split-window'.
2043 The third argument of `split-window' has been renamed to SIDE and can be
2044 set to any of the values 'below, 'right, 'above, or 'left to make the
2045 new window appear on the corresponding side of the window that shall be
2046 split. Any other value of SIDE will cause `split-window' to split the
2047 window into two side-by-side windows as before.
2049 *** Window resizing functions.
2050 A new standard function for resizing windows called `window-resize' has
2051 been introduced. This and all other functions for resizing windows no
2052 longer delete any windows when they become too small.
2054 *** Deleting the selected window now selects the most recently selected
2055 live window on that frame instead.
2057 *** `adjust-window-trailing-edge' adjustments.
2058 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2059 is able to resize other windows if a window adjacent to the trailing
2060 edge cannot be shrunk any more. This makes its behavior more similar to
2061 that of Emacs 21 without compromising, however, its inability to delete
2062 windows which was introduced in Emacs 22.
2064 *** Window-local buffer lists.
2065 Windows now have local buffer lists. This means that removing a buffer
2066 from display in a window will preferably show the buffer previously
2067 shown in that window with its previous window-start and window-point
2068 positions. This also means that the same buffer may be automatically
2069 shown twice even if it already appears in another window.
2071 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2072 which if non-nil requires the buffer to be displayed in the currently
2073 selected window, signaling an error otherwise. If nil, another window
2074 can be used, e.g. if the selected one is strongly dedicated.
2076 *** `split-window-vertically' and `split-window-horizontally' renamed
2077 to `split-window-below' and `split-window-right' respectively.
2078 The old names are kept as aliases.
2082 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2083 named ACTION, and takes a display action of the same form as
2084 `display-buffer-base-action' (see Changes, above). A non-nil,
2085 non-list value is treated specially, as the old meaning.
2087 **** New variable `display-buffer-overriding-action'.
2089 **** The procedure of `display-buffer' etc. to choose a window is
2090 determined by combining `display-buffer-overriding-action',
2091 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2092 and `display-buffer-fallback-action'. The second and fourth of these
2093 are user-customizable variables.
2095 See the docstring of `display-buffer' for details.
2097 *** New functions `window-state-get' and `window-state-put'.
2098 These functions allow to save and restore the state of an arbitrary
2099 frame or window as an Elisp object.
2103 *** New variable `completion-extra-properties' used to specify extra
2104 properties of the current completion:
2105 - :annotate-function, same as the old completion-annotate-function.
2106 - :exit-function, function to call after completion took place.
2108 *** Functions on `completion-at-point-functions' can return any of the
2109 properties valid for `completion-extra-properties'.
2111 *** `completion-annotate-function' is obsolete.
2113 *** New `metadata' method for completion tables. The metadata thus returned
2114 can specify various details of the data returned by `all-completions':
2115 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2116 used to select a style in completion-category-overrides.
2117 - `annotation-function' to add annotations in *Completions*.
2118 - `display-sort-function' to specify how to sort entries in *Completions*.
2119 - `cycle-sort-function' to specify how to sort entries when cycling.
2121 *** `minibuffer-local-filename-must-match-map' is not used any more.
2122 Instead, the bindings in `minibuffer-local-filename-completion-map'
2123 are combined with `minibuffer-local-must-match-map'.
2125 *** New variable `completing-read-function' allows overriding the
2126 behavior of `completing-read'.
2128 ** `glyphless-char-display' can now distinguish between graphical and
2129 text terminal display, via a char-table entry that is a cons cell.
2131 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2132 Instead, the offending function is removed.
2136 *** New function `run-hook-wrapped' for running an abnormal hook by
2137 passing the hook functions as arguments to a "wrapping" function.
2138 Like `run-hook-with-args-until-success', it stops at the first
2139 non-nil return value.
2141 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2142 set of "wrapping" filters, similar to around advice.
2143 (A version of this macro was actually added in Emacs 23.2 but was not
2144 advertised at the time.)
2148 *** New macro `condition-case-unless-debug' (this was actually added in
2149 Emacs 23.1 as condition-case-no-debug, but not advertised)
2151 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2153 *** Variable `stack-trace-on-error' removed.
2155 *** The debugger can now "continue" from an error, which means it will
2156 jump to the error handler as if the debugger had not been invoked
2157 instead of jumping all the way to the top-level.
2159 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2160 This can be useful when `inhibit-quit' is set.
2162 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2163 named Emacs server instances.
2165 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2166 to redirect STDOUT to a file.
2168 ** The function `format-time-string' now supports the %N directive,
2169 for higher-resolution time stamps.
2171 ** New input reading functions
2173 *** New function `read-char-choice' reads a restricted set of
2174 characters, discarding any inputs not inside the set.
2176 *** The command `read-color' now requires a match for a color name
2177 or RGB triplet, instead of signaling an error if the user provides
2180 **** `facemenu-read-color' is now an alias for `read-color'.
2182 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2183 The variable is now used to load all kind of supported dynamic libraries,
2184 not just image libraries. The previous name is still available as an
2187 ** Syntax parsing changes
2189 *** New variable `syntax-propertize-function'.
2190 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2191 This allows syntax-table properties to be set independently from font-lock:
2192 just call syntax-propertize to make sure the text is propertized.
2193 Together with this new variable come a new hook
2194 syntax-propertize-extend-region-functions, as well as two helper functions:
2195 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2196 as-is; and syntax-propertize-rules which provides a new way to specify
2199 *** Syntax tables support a new "comment style c" additionally to style b.
2201 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2203 ** frame-local variables cannot be let-bound any more.
2205 ** Major and minor mode changes
2207 *** `set-auto-mode' now respects mode: local variables at the end of files,
2208 as well as those in the -*- line.
2210 *** `prog-mode' is a new major mode from which programming modes
2213 **** `prog-mode-hook' can be used to enable features for programming
2214 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2215 on-the-fly spell checking for comments and strings.
2217 *** New hook `change-major-mode-after-body-hook', run by
2218 `run-mode-hooks' just before any other mode hooks.
2220 *** Enabled globalized minor modes can be disabled in specific major modes.
2221 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2222 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2224 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2226 ** File-handling changes
2228 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2229 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2230 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2231 argument is supplied (see Trash changes, above).
2233 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2235 ** Tool-bars can display separators.
2236 Tool-bar separators are handled like menu separators in menu-bar maps,
2237 i.e. via menu entries of the form `(menu-item "--")'.
2241 *** Animated images support (currently animated gifs only).
2243 **** `image-animated-p' returns non-nil if an image can be animated.
2245 **** `image-animate' animates a supplied image spec.
2247 **** `image-animate-timer' returns the timer object for an image that
2250 *** `image-extension-data' has been renamed to `image-metadata'.
2251 The old name is an obsolete alias to the new one.
2253 *** Image mode can view any image type that ImageMagick supports.
2254 This requires Emacs to be built with ImageMagick support.
2256 **** New function `imagemagick-types', defined if ImageMagick support
2257 is enabled, returns a list of image file extensions that your
2258 ImageMagick installation supports.
2260 **** New function `imagemagick-register-types' enables ImageMagick
2261 image types in Image mode and in `create-image' and other helper
2264 **** New option `imagemagick-types-inhibit' excludes certain
2265 ImageMagick image types from `imagemagick-register-types'.
2267 **** With ImageMagick support, there are extra Image mode commands to
2268 resize and rotate images: `image-transform-fit-to-height',
2269 `image-transform-fit-to-width', `image-transform-set-rotation', and
2270 `image-transform-set-scale'.
2272 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2273 passes it to the mail user agent function. This argument specifies an
2274 action for returning to the caller after finishing with the mail. For
2275 example, this is used by Rmail to optionally delete a mail window.
2277 ** XML and HTML parsing
2278 If Emacs is compiled with libxml2 support, there are two new
2279 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2280 and `libxml-parse-xml-region' (which parses XML). Both return an
2281 Emacs Lisp parse tree.
2283 ** Networking and encryption changes
2285 *** `open-network-stream' can now be used to open an encrypted stream.
2286 It now accepts an optional `:type' parameter for initiating a TLS
2287 connection, directly or via STARTTLS. To do STARTTLS, additional
2288 parameters (`:end-of-command', `:success', `:capabilities-command')
2289 must also be supplied.
2291 *** New library gnutls.el.
2292 The new function `gnutls-available-p' returns non-nil if Emacs is
2293 built with GnuTLS support. The main entry points are
2294 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2295 these functions through `open-network-stream', because that can
2296 upgrade connections through STARTTLS opportunistically or use plain
2297 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2300 *** New primitive `secure-hash' that supports many secure hash algorithms:
2301 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2302 sha1.el has been removed. The `sha1' feature is provided by default.
2306 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2308 ** Progress reporters can now "spin".
2309 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2310 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2311 time you call `progress-reporter-update' on that progress reporter,
2312 with a nil or omitted VALUE argument, the reporter message is
2313 displayed with a "spinning bar".
2315 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2316 being reverted, even if the buffer has a local `revert-buffer-function'.
2318 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2319 If delayed-warnings-list is non-nil, the command loop calls
2320 `delayed-warnings-hook' after `post-command-hook'. At present, this
2321 is only used by Emacs on some platforms to display warnings during
2322 startup, which might otherwise not be noticed. This uses the
2323 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2325 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2327 ** New function `make-composed-keymap' that constructs a new keymap
2328 from multiple input maps. You can use this to make a keymap that
2329 inherits from multiple maps, eg:
2330 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2332 ** New function `string-prefix-p'.
2333 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2335 ** New reader macro ## that stands for the empty symbol.
2336 This means that the empty symbol can now be read back. Also, #: by itself
2337 (when not immediately followed by a possible symbol character) stands for
2338 an empty uninterned symbol.
2340 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2342 ** The following functions and variables are obsolete:
2344 *** `tooltip-use-echo-area' is obsolete.
2345 Rather than setting this to t, disable Tooltip mode instead.
2347 *** buffer-substring-filters is obsolete.
2348 Use `filter-buffer-substring-functions' instead.
2350 *** `byte-compile-disable-print-circle' is obsolete.
2352 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2353 Use `post-command-hook' instead.
2355 *** `font-lock-maximum-size' is obsolete.
2358 * Changes in Emacs 24.1 on non-free operating systems
2360 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2361 and also when HOME is set to C:\ by default.
2363 ** New configure.bat options
2365 *** --enable-checking builds Emacs with extra runtime checks.
2367 *** --distfiles specifies files to be included in binary distribution.
2369 *** --without-gnutls disables automatic GnuTLS detection.
2371 *** --lib for general library linkage, works with the USER_LIBS build variable.
2373 ** New make target `dist' to create binary distribution for MS Windows.
2375 ** The Lisp function `w32-default-color-map' is now obsolete.
2376 (It is only used internally in the Emacs C code.)
2378 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2379 reappear on mouse-over. (Requires OS X 10.6 or later.)
2381 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2382 other platforms, rather than inserting its contents into the buffer.
2385 ----------------------------------------------------------------------
2386 This file is part of GNU Emacs.
2388 GNU Emacs is free software: you can redistribute it and/or modify
2389 it under the terms of the GNU General Public License as published by
2390 the Free Software Foundation, either version 3 of the License, or
2391 (at your option) any later version.
2393 GNU Emacs is distributed in the hope that it will be useful,
2394 but WITHOUT ANY WARRANTY; without even the implied warranty of
2395 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2396 GNU General Public License for more details.
2398 You should have received a copy of the GNU General Public License
2399 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2404 paragraph-separate: "[
\f]*$"