1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2012 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * Installation Changes in Emacs 24.4
25 * Startup Changes in Emacs 24.4
26 * Changes in Emacs 24.4
27 * Editing Changes in Emacs 24.4
30 * Changes in Specialized Modes and Packages in Emacs 24.4
34 *** Calc by default now uses the Gregorian calendar for all dates, and
35 uses January 1, 1 AD as its day number 1. Previously Calc used the
36 Julian calendar for dates before September 14, 1752, and it used
37 December 31, 1 BC as its day number 1; the new scheme is more
38 consistent with Calendar's calendrical system and day numbering.
40 *** The new variable `calc-gregorian-switch' lets you configure the
41 date when Calc switches from the Julian to the Gregorian calendar.
42 Nil, the default value, means to always use the Gregorian calendar.
43 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
48 *** New option `erc-accidental-paste-threshold-seconds'.
49 If set to a number, this can be used to avoid accidentally paste large
50 amounts of data into the ERC input.
52 ** Icomplete is a bit more like IDO.
53 *** key bindings to navigate through and select the completions.
54 *** The icomplete-separator is customizable, and its default has changed.
55 *** Removed icomplete-show-key-bindings.
57 ** MH-E has been updated to MH-E version 8.4.
58 See MH-E-NEWS for details.
61 ** New function `ses-rename-cell' to give SES cells arbitrary names.
63 ** trace-function was largely rewritten.
65 - no prompting for the destination buffer, unless a prefix-arg was used.
66 - additionally to prompting for a destination buffer, when a prefix-arg is
67 used, the user can enter a "context", i.e. Lisp expression whose value at the
68 time the function is entered/exited will be printed along with the function
69 name and arguments. Useful to trace the value of (current-buffer) or
70 (point) when the function is invoked.
72 ** New command `delete-duplicate-lines' has two types of operation:
73 when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
74 it works like the utility `uniq'. Otherwise by default it deletes
75 duplicate lines everywhere in the region without regard to adjacency.
79 *** The commands `woman-default-faces' and `woman-monochrome-faces'
80 are obsolete. Customize the `woman-* faces instead.
84 *** longlines.el is obsolete; use visual-line-mode instead.
87 * New Modes and Packages in Emacs 24.4
88 ** New nadvice.el package offering lighter-weight advice facilities.
90 - add-function/remove-function which can be used to add/remove code on any
91 function-carrying place, such as process-filters or `<foo>-function' hooks.
92 - advice-add/advice-remove to add/remove a piece of advice on a named function,
93 much like `defadvice' does.
95 * Incompatible Lisp Changes in Emacs 24.4
97 ** nil and "unbound" are indistinguishable in symbol-function.
98 `symbol-function' never signals `void-function' any more.
99 `fboundp' returns non-nil if the symbol was `fset' to nil.
101 ** `defadvice' does not honor the `freeze' flag and cannot advise
102 special-forms any more.
104 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
105 VAR was bound to nil which was not tremendously useful and just lead to
106 spurious warnings about an unused var.
108 * Lisp changes in Emacs 24.4
112 *** The `face-spec-set' is now analogous to `setq' for face specs.
113 Its third arg now accepts values specifying exactly which face spec to
114 set (defface, custom, or user spec), and it directly sets the relevant
115 property using the supplied face spec.
117 *** Face specs set via Custom themes now replace the `defface' spec
118 rather than inheriting from it (as do face specs set via Customize).
120 ** time-to-seconds is not obsolete any more.
121 ** New function special-form-p.
122 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
123 text-property on the first char.
125 ** The `defalias-fset-function' property lets you catch calls to defalias
126 and redirect them to your own function instead of `fset'.
128 * Changes in Emacs 24.4 on non-free operating systems
131 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
132 The backtrace is written to the 'emacs_backtrace.txt' file in the
133 directory where Emacs was running.
136 * Installation Changes in Emacs 24.3
139 ** The default toolkit has been changed to Gtk+ version 3.
140 If you don't pass --with-x-toolkit to configure or if you pass
141 --with-x-toolkit=gtk or --with-x-toolkit=yes, configure will try to build
142 with Gtk+ version 3, and if that fails, try Gtk+ version 2.
143 You can explicitly require a specific version by passing
144 --with-x-toolkit=gtk2 or --with-x-toolkit=gtk3 to configure.
147 ** New configure option '--without-all' to disable additional features.
148 This disables most of the features that are normally enabled by default.
151 ** New configure option '--enable-link-time-optimization' to utilize
152 an appropriate feature provided by GCC since version 4.5.0.
155 ** New configure option '--enable-gcc-warnings', intended for developers.
156 If building with GCC, this enables compile-time checks that warn about
157 possibly-questionable C code. On a recent GNU system there should be
158 no warnings; on older and on non-GNU systems the generated warnings
162 ** The configure option '--enable-use-lisp-union-type' has been
163 renamed to '--enable-check-lisp-object-type', as the resulting
164 Lisp_Object type no longer uses a union to implement the compile time
165 check that this option enables.
168 ** The configure option '--disable-maintainer-mode' has been removed,
169 as it was confusingly-named and rarely useful.
172 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
173 overwriting "emacs" in the installation bin/ directory with a link
177 ** The configure options `--program-prefix', `--program-suffix', and
178 `--program-transform-name' apply to more than just the installed
179 binaries. Now they also affect the man pages, icons, and the
180 etc/emacs.desktop file; but not the info pages, since this would break
181 links between the various manuals.
184 ** Emacs uses libtinfo in preference to libncurses, if available.
187 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
188 /usr/pkg/lib to the linker search path. You must add them yourself if
192 ** The standalone scripts rcs-checkin and vcdiff have been removed
193 (from the bin and libexec directories, respectively). The former is
194 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
197 * Startup Changes in Emacs 24.3
200 ** Emacs no longer searches for `leim-list.el' files beneath the standard
201 lisp/ directory. There should not be any there anyway. If you have
202 been adding them there, put them somewhere else, eg site-lisp.
205 ** The `--no-site-lisp' command line option now works for Nextstep builds.
208 * Changes in Emacs 24.3
211 ** Most y-or-n prompts now allow you to scroll the selected window.
212 Typing C-v or M-v at a y-or-n prompt scrolls forward or backward
213 respectively, without exiting from the prompt.
217 *** New option `mode-line-default-help-echo' specifies the help text
218 (shown in a tooltip or in the echo area) for any part of the mode line
219 that does not have its own specialized help text.
221 *** You can now click mouse-3 in the coding system indicator to invoke
222 `set-buffer-file-coding-system'.
227 *** `C-h f' (describe-function) can now perform autoloading.
228 When this command is called for an autoloaded function whose docstring
229 contains a key substitution construct, that function's library is
230 automatically loaded, so that the documentation can be shown
231 correctly. To disable this, set `help-enable-auto-load' to nil.
234 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
235 even after their associated libraries have been loaded (and the
236 autoloads have been redefined as functions).
238 ** Minibuffer changes
240 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
241 next and previous path separator, respectively.
243 *** minibuffer-electric-default-mode can rewrite (default ...) to [...].
244 Just set minibuffer-eldef-shorten-default to t before enabling the mode.
247 ** ImageMagick support, if available, is automatically enabled.
248 It is no longer necessary to call `imagemagick-register-types'
249 explicitly to install ImageMagick image types; that function is called
250 automatically at startup, or when customizing an imagemagick- option.
252 *** Setting `imagemagick-types-inhibit' to t now disables the use of
253 ImageMagick to view images. You must call imagemagick-register-types
254 afterwards if you do not use customize to change this.
256 *** The new variable `imagemagick-enabled-types' also affects which
257 ImageMagick types are treated as images. The function
258 `imagemagick-filter-types' returns the list of types that will be
261 *** Images displayed via ImageMagick now support transparency and the
262 :background image spec property.
264 ** Server and client changes
266 *** emacsclient now obeys string values for `initial-buffer-choice',
267 if it is told to open a new frame without specifying any file to visit
268 or expression to evaluate.
270 *** New option `server-auth-key' specifies a shared server key.
273 ** In the Package Menu, newly-available packages are listed as "new",
274 and sorted above the other "available" packages by default.
277 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
278 This minor mode replaces `toggle-read-only', which is now obsolete.
281 ** Emacs now generates backtraces on fatal errors.
282 On encountering a fatal error, Emacs now outputs a textual description
283 of the fatal signal, and a short backtrace on platforms like glibc
284 that support backtraces.
287 ** If your Emacs was built from a bzr checkout, the new variable
288 `emacs-bzr-version' contains information about the bzr revision used.
291 ** New variable `create-lockfiles' specifies usage of lockfiles.
292 It defaults to t. Changing it to nil inhibits the creation of lock
293 files (use this with caution).
296 ** Using "unibyte: t" in Lisp source files is obsolete.
297 Use "coding: raw-text" instead.
300 ** Setting `enable-remote-dir-locals' to non-nil allows directory
301 local variables on remote hosts.
304 ** The entry for PCL-CVS has been removed from the Tools menu.
305 The PCL-CVS commands are still available via the keyboard.
307 ** Internationalization changes
309 *** New language environment: Persian.
311 *** New input method `vietnamese-vni'.
313 ** Nextstep (GNUstep / Mac OS X) port changes
315 *** Fullscreen and frame parameter fullscreen is supported.
317 *** A file dialog is used for open/save operations initiated from the
321 * Editing Changes in Emacs 24.3
323 ** Navigation command changes
325 *** New binding `M-g c' for `goto-char'.
327 *** New binding `M-g TAB' for `move-to-column'.
329 *** `M-g TAB' (`move-to-column') prompts for a column number if called
330 interactively with no prefix arg. Previously, it moved to column 1.
332 ** Search and Replace changes
334 *** Non-regexp Isearch now performs "lax" space matching.
335 Each sequence of spaces in the supplied search string may match any
336 sequence of one or more whitespace characters, as specified by the
337 variable `search-whitespace-regexp'. (This variable is also used by a
338 similar existing feature for regexp Isearch).
340 *** New Isearch command `M-s SPC' toggles lax space matching.
341 This applies to both ordinary and regexp Isearch.
343 *** New option `replace-lax-whitespace'.
344 If non-nil, `query-replace' uses flexible whitespace matching too.
347 *** Global `M-s _' starts a symbol (identifier) incremental search,
348 and `M-s _' in Isearch toggles symbol search mode.
349 `M-s c' in Isearch toggles search case-sensitivity.
352 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
353 `ucs-insert' is now an obsolete alias for `insert-char'.
356 ** The `z' key no longer has a binding in most special modes.
357 It used to be bound to `kill-this-buffer', but `z' is too easy to
361 ** New option `delete-trailing-lines' specifies whether
362 M-x delete-trailing-whitespace should delete trailing lines at the end
363 of the buffer. It defaults to t.
367 *** `C-x r +' is now overloaded to invoke `append-to-register.
369 *** New option `register-separator' specifies the register containing
370 the text to put between collected texts for use with M-x
371 append-to-register and M-x prepend-to-register.
374 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
377 ** New command `C-x r M-w' (copy-rectangle-as-kill).
378 It copies the region-rectangle as the last rectangle kill.
381 ** New option `yank-handled-properties' allows processing of text
382 properties on yanked text, in more ways that are more general than
383 just removing them, as done by `yank-excluded-properties'.
386 * Changes in Specialized Modes and Packages in Emacs 24.3
390 *** The faces used by Apropos are now directly customizable.
391 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
392 see the `apropos' Custom group for details.
394 *** The old options whose values specified faces to use were removed
395 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
398 This package has been rewritten to use Tabulated List mode.
400 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
401 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
406 *** You can customize the header text that appears above each calendar month.
407 See the variable `calendar-month-header'.
410 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
413 *** The calendars produced by cal-html include holidays.
414 Customize `cal-html-holidays' to change this.
419 *** CL's main entry is now (require 'cl-lib).
420 `cl-lib' is like the old `cl' except that it uses the namespace cleanly,
421 i.e. all its definitions have the "cl-" prefix (and internal definitions use
424 If `cl' provided a feature under the name `foo', then `cl-lib' provides it
425 under the name `cl-foo' instead, with the exceptions of the few definitions
426 that had to use `foo*' to avoid conflicts with pre-existing Elisp entities,
427 which have not been renamed to `cl-foo*' but just `cl-foo'.
429 The old `cl' is now deprecated and is mainly just a bunch of aliases that
430 provide the old non-prefixed names. Some exceptions are listed below.
433 *** `cl-flet' is not like `flet' (which is deprecated).
434 Instead it obeys the behavior of Common-Lisp's `flet'.
435 In particular, in cl-flet function definitions are lexically scoped,
436 whereas in flet the scoping is dynamic.
439 *** `cl-labels' is slightly different from `labels'.
440 The difference is that it relies on the `lexical-binding' machinery (as opposed
441 to the `lexical-let' machinery used previously) to capture definitions in
442 closures, so such closures will only work if `lexical-binding' is in use.
445 *** `cl-letf' is not exactly like `letf'.
446 The only difference is in details that relate to some deprecated usage
447 of `symbol-function' in place forms.
450 *** `progv' was rewritten to use the `let' machinery.
451 A side effect is that vars without corresponding value are bound to nil
452 rather than making them unbound.
455 *** The following methods of extending `setf' are obsolete
456 (use features from gv.el instead):
457 `define-modify-macro' (use `gv-letplace')
458 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
459 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
460 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
463 ** New compilation option `compilation-always-kill'.
467 *** `custom-reset-button-menu' now defaults to t.
469 *** Non-option variables are never matched in `customize-apropos' and
470 `customize-apropos-options' (i.e. the prefix argument does nothing for
474 ** `desktop-path' no longer includes the "." directory.
475 Desktop files are now located in ~/.emacs.d by default.
480 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
483 *** The D-Bus object manager interface is implemented.
486 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
487 if their value does not fit into Emacs's integer range.
490 *** The function `dbus-call-method' works non-blocking now, it can be
491 interrupted by C-g. `dbus-call-method-non-blocking' is obsolete.
494 *** Signals can be sent also as unicast message.
497 *** The argument list of `dbus-register-signal' has been extended,
498 according to the new match rule types of D-Bus. See the manual for
502 *** `dbus-init-bus' supports private connections.
505 *** There is a new function `dbus-setenv'.
510 *** Changes are now highlighted using the same color scheme as in
511 modern VCSes. Deletions are displayed in red (new faces
512 `diff-refine-removed' and `smerge-refined-removed', and new definition
513 of `diff-removed'), insertions in green (new faces `diff-refine-added'
514 and `smerge-refined-added', and new definition of `diff-added').
517 *** The variable `diff-use-changed-face' defines whether to use the
518 face `diff-changed', or `diff-removed' and `diff-added' to highlight
519 changes in context diffs.
522 *** The new command `diff-delete-trailing-whitespace' removes trailing
523 whitespace introduced by a diff.
527 *** `dired-do-async-shell-command' executes each file sequentially
528 if the command ends in `;' (when operating on multiple files).
529 Otherwise, it executes the command on each file in parallel.
531 *** Typing M-n in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
532 `dired-do-chown', `dired-do-touch' pulls the file attributes of the
535 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
536 `DEL' (`dired-unmark-backward'), `d' (`dired-flag-file-deletion')
537 mark/unmark/flag all files in the active region.
539 *** The minibuffer default for `=' (`dired-diff) has changed.
540 It is now the backup file for the file at point, if one exists.
541 In Transient Mark mode the default is the file at the active mark.
543 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
544 The global binding for `M-=', `count-words-region' is in effect.
547 ** Ediff now uses the same color scheme as Diff mode.
552 *** New module "notifications", which can send a notification when you
553 receive a private message or your nickname is mentioned.
556 *** ERC will look up server/channel names via auth-source and use any
560 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
561 only applies to messages sent by lurkers.
564 ** Flymake uses fringe bitmaps to indicate errors and warnings.
565 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
566 `flymake-warning-bitmap'.
569 ** Follow mode no longer works by using advice.
570 The option `follow-intercept-processes' has been removed.
573 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
574 specifying URL types that should be converted to remote file names at
575 the FFAP prompt. The default is now '("ftp").
578 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
579 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
582 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
585 ** New option `mouse-avoidance-banish-position' specifies where the
586 `banish' mouse avoidance setting moves the mouse.
589 ** notifications.el supports now version 1.2 of the Notifications API.
590 The function `notifications-get-capabilities' returns the supported
594 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
595 closing brackets to be aligned with the line of the opening bracket.
598 ** In Proced mode, new command `proced-renice' renices marked processes.
603 A new version of python.el, which provides several new features, including:
604 per-buffer shells, better indentation, Python 3 support, and improved
605 shell-interaction compatible with iPython (and virtually any other
608 *** Some user options have been replaced/renamed:
609 Old defcustom: | New defcustom:
610 python-indent | python-indent-offset
611 python-guess-indent | python-indent-guess-indent-offset
612 python-pdbtrack-do-tracking-p | python-pdbtrack-activate
613 python-use-skeletons | python-skeleton-autoinsert
615 *** Some user options have been removed:
617 **** `python-indent-string-contents': Strings are never indented.
619 **** `python-honour-comment-indentation':
620 Comments are never considered as indentation markers themselves.
622 **** `python-continuation-offset': Indentation is automatically
623 calculated in a pep8 compliant way depending on the context.
625 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
626 Have no direct mapping as the shell interaction is completely different.
628 **** `python-python-command', `python-jython-command':
629 Replaced by `python-shell-interpreter'.
631 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
632 `python-pdbtrack-minor-mode-string', `python-source-modes':
635 *** Some commands have been replaced:
636 Old command | New command
637 python-insert-class | python-skeleton-class
638 python-insert-def | python-skeleton-def
639 python-insert-for | python-skeleton-for
640 python-insert-if | python-skeleton-if
641 python-insert-try/except | python-skeleton-try
642 python-insert-try/finally | python-skeleton-try
643 python-insert-while | python-skeleton-while
644 python-find-function | python-nav-jump-to-defun
645 python-next-statement | python-nav-forward-sentence
646 python-previous-statement | python-nav-backward-sentence
647 python-beginning-of-defun-function | python-nav-beginning-of-defun
648 python-end-of-defun-function | python-nav-end-of-defun
649 python-send-buffer | python-shell-send-buffer
650 python-send-defun | python-shell-send-defun
651 python-send-region | python-shell-send-region
652 python-send-region-and-go | Emulate with python-shell-send-region and
653 python-shell-switch-to-shell
654 python-send-string | python-shell-send-string
655 python-switch-to-python | python-shell-switch-to-shell
656 python-describe-symbol | python-eldoc-at-point
659 ** reStructuredText mode
661 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
662 fontification, comment handling, and customization have all been revised
665 *** Support for `imenu' and `which-function-mode'.
667 *** The reStructuredText syntax is more closely covered.
668 Sphinx support has been improved.
670 *** `rst-insert-list' inserts new list or continues existing lists.
672 *** A negative prefix argument always works for `rst-adjust'.
674 *** The window configuration is reset after displaying a TOC.
676 *** The constant `rst-version' describes the rst.el package version.
681 *** Pairing of parens/quotes uses electric-pair-mode instead of skeleton-pair.
683 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
685 *** `sh-use-smie' lets you choose a new indentation and navigation code.
688 ** New option `async-shell-command-buffer' specifies the buffer to use
689 for a new asynchronous `shell-command' when the default output buffer
690 `*Async Shell Command*' is already in use.
693 ** SQL mode has a new option `sql-db2-escape-newlines'.
694 If non-nil, newlines sent to the command interpreter will be escaped
695 by a backslash. The default does not escape the newlines and assumes
696 that the sql statement will be terminated by a semicolon.
698 ** Tabulated List and packages derived from it
700 *** New command `tabulated-list-sort', bound to `S', sorts the column
701 at point, or the Nth column if a numeric prefix argument is given.
705 *** The variables `term-default-fg-color' and `term-default-bg-color' are
706 now deprecated in favor of the customizable face `term'.
708 *** You can customize how to display ANSI terminal colors and styles
709 by customizing the corresponding `term-color-<COLOR>',
710 `term-color-underline' and `term-color-bold' faces.
714 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
715 See the manual for details.
717 *** Remote processes are now supported also on remote Windows host.
721 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
722 Previously, this slot stored semicolon-separated attribute-value pairs
723 appended to some imap URLs, but this is not compatible with RFC 3986.
724 So now the `filename' slot stores the entire path and query components
725 and the `attributes' slot is always nil.
727 *** New function `url-encode-url' for encoding a URI string.
728 The `url-retrieve' function now uses this to encode its URL argument,
729 in case that is not properly encoded.
734 *** The free software compiler GHDL is supported (and now the default).
736 *** Support for the VHDL-AMS packages has been added/updated.
738 *** Updated to the 2002 revision of the VHDL standard.
740 *** Accepts \r and \f as whitespace.
743 ** `which-func-modes' now defaults to t, so Which Function mode, when
744 enabled, applies to all applicable major modes.
747 ** winner-mode-hook now runs when the mode is disabled, as well as when it is
751 ** Hooks renamed to avoid obsolete "-hooks" suffix:
752 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
753 *** semantic-change-hooks -> semantic-change-functions
754 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
755 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
756 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
757 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
758 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
759 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
760 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
761 *** rcirc-activity-hooks -> rcirc-activity-functions
762 *** rcirc-print-hooks -> rcirc-print-functions
763 *** dbus-event-error-hooks -> dbus-event-error-functions
764 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
765 *** checkdoc-style-hooks -> checkdoc-style-functions
766 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
767 *** archive-extract-hooks -> archive-extract-hook
768 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
769 *** hfy-post-html-hooks -> hfy-post-html-hook
770 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
771 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
772 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
773 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
775 ** Obsolete packages:
778 In most cases, assoc+member+push+delq work just as well.
779 And in any case it's just a terrible package: ugly semantics, terrible
780 inefficiency, and not namespace-clean.
795 * Incompatible Lisp Changes in Emacs 24.3
798 ** set-buffer-multibyte now signals an error in narrowed buffers.
801 ** (random) by default now returns a different random sequence in
802 every Emacs run. Use (random S), where S is a string, to set the
803 random seed to a value based on S, in order to get a repeatable
804 sequence in later calls.
807 ** The function `x-select-font' can return a font spec, instead of a
808 font name as a string. Whether it returns a font spec or a font name
809 depends on the graphical library.
812 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
813 that substring is inserted literally even if the LITERAL arg is
814 non-nil, instead of causing an error to be signaled.
817 ** Docstrings starting with `*' no longer indicate user options.
818 Only variables defined using `defcustom' are considered user options.
819 The function `user-variable-p' is now an obsolete alias for
823 ** The return values of `defalias', `defun' and `defmacro' have changed,
824 and are now undefined. For backwards compatibility, `defun' and
825 `defmacro' currently return the name of the newly defined
826 function/macro, but this should not be relied upon.
829 ** `face-spec-set' no longer sets frame-specific attributes when the
830 third argument is a frame (that usage was obsolete since Emacs 22.2).
833 ** The arguments of `dbus-register-signal' are no longer just strings,
834 but keywords or keyword-string pairs. The old argument list will
835 still be supported for Emacs 24.x.
838 ** The CL package's `get-setf-method' function no longer exists.
839 Generalized variables are now part of core Emacs Lisp, and implemented
840 differently to the way cl.el used to do it. It is not possible to
841 define a compatible replacement for `get-setf-method'. See the file
842 gv.el for internal details of the new implementation.
845 Some Lisp symbols have been renamed to avoid problems with spelling
846 that is incorrect or inconsistent with how Emacs normally spells a word.
849 *** Renamed functions
851 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
852 **** inactivate-input-method -> deactivate-input-method
853 **** quail-inactivate -> quail-deactivate
854 **** robin-inactivate -> robin-deactivate
855 **** viper-inactivate-input-method -> viper-deactivate-input-method
856 **** viper-inactivate-input-method-action ->
857 viper-deactivate-input-method-action
858 **** ucs-input-inactivate -> ucs-input-deactivate
862 The old hooks are still supported for backward compatibility, but they
863 are deprecated and will be removed eventually.
864 **** input-method-inactivate-hook -> input-method-deactivate-hook
865 **** robin-inactivate-hook -> robin-deactivate-hook
866 **** quail-inactivate-hook -> quail-deactivate-hook
869 *** Renamed Lisp variables
870 **** follow-deactive-menu -> follow-inactive-menu
871 **** inactivate-current-input-method-function ->
872 deactivate-current-input-method-function
875 ** Some obsolete functions, variables, and faces have been removed:
876 *** `last-input-char', `last-command-char', `unread-command-char'
877 *** `facemenu-unlisted-faces'
878 *** `rmail-decode-mime-charset'
879 *** `iswitchb-read-buffer'
880 *** `sc-version', `sc-submit-bug-report'
881 *** `set-char-table-default'
882 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
883 *** `compile-internal'
885 *** `mode-line-inverse-video'
886 *** `follow-mode-off-hook'
887 *** `cvs-commit-buffer-require-final-newline'
888 (use `log-edit-require-final-newline' instead)
889 *** `cvs-changelog-full-paragraphs'
890 (use `log-edit-changelog-full-paragraphs' instead)
891 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
892 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
893 *** `vc-master-templates' (use `vc-handled-backends' instead)
894 *** `vc-checkout-carefully'
897 * Lisp changes in Emacs 24.3
899 ** New sampling-based Elisp profiler.
900 Try M-x profiler-start, do some work, and then call M-x profiler-report.
901 When finished, use M-x profiler-stop. The sampling rate can be based on
902 CPU time or memory allocations.
905 ** CL-style generalized variables are now in core Elisp.
906 `setf' is autoloaded; `push' and `pop' accept generalized variables.
907 You can define your own generalized variables using `gv-define-simple-setter',
908 `gv-define-setter', etc.
911 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
912 The interpretation of the DECLS is determined by `defun-declarations-alist'.
916 *** `read-regexp' has a new argument HISTORY; the first argument PROMPT
917 of `read-regexp' accepts a string ending with a colon and space, and its
918 second argument DEFAULTS can be a list of strings accessible via M-n
919 in the minibuffer ahead of other hard-coded useful regexp-related values.
920 More commands use `read-regexp' now to read their regexp arguments.
924 *** New function `completion-table-with-quoting' to handle completion
925 in the presence of quoting, such as file completion in shell buffers.
928 *** New function `completion-table-subvert' to use an existing completion
929 table, but with a different prefix.
934 *** New error type and new function `user-error'.
935 These do not trigger the debugger.
938 *** New option `debugger-bury-or-kill', saying what to do with the
939 debugger buffer when exiting debug.
942 *** Set `debug-on-message' to enter the debugger when a certain
943 message is displayed in the echo area. This can be useful when trying
944 to work out which code is doing something.
946 *** New var `inhibit-debugger', automatically set to prevent accidental
947 recursive invocations.
951 *** The functions get-lru-window, get-mru-window and get-largest-window
952 now accept a third argument to avoid choosing the selected window.
954 *** Additional values recognized for option `window-combination-limit'.
957 *** New macro `with-temp-buffer-window', similar to
958 `with-output-to-temp-buffer'.
961 *** `temp-buffer-resize-mode' no longer resizes windows that have been
965 *** New command `fit-frame-to-buffer' adjusts the frame height to
969 *** The command `fit-window-to-buffer' can adjust the frame height
970 if the new option `fit-frame-to-buffer' is non-nil.
973 *** New option switch-to-buffer-preserve-window-point to restore a
974 window's point when switching buffers.
976 *** New display action functions `display-buffer-below-selected',
977 and `display-buffer-in-previous-window'.
979 *** New display action alist entry `inhibit-switch-frame', if non-nil,
980 tells display action functions to avoid changing which frame is
983 *** New display action alist entry `pop-up-frame-parameters', if
984 non-nil, specifies frame parameters to give any newly-created frame.
986 *** New display action alist entry `previous-window', if non-nil,
987 specifies window to reuse in `display-buffer-in-previous-window'.
989 *** New display action alist entries `window-height' and `window-width'
990 to specify size of new window created by `display-buffer'.
992 *** The following variables are obsolete, as they can be replaced by
993 appropriate entries in the `display-buffer-alist' function introduced
996 **** `display-buffer-reuse-frames'
998 **** `special-display-regexps'
1000 **** `special-display-frame-alist'
1002 **** `special-display-buffer-names'
1004 **** `special-display-function'
1006 **** `display-buffer-function'
1008 **** `dired-shrink-to-fit'
1012 *** `current-time-string' no longer requires that its argument's year
1013 must be in the range 1000..9999. It now works with any year supported
1014 by the underlying C implementation.
1016 *** `current-time' now returns extended-format time stamps
1017 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1018 PSEC is typically a multiple of 1000 on current machines. Other
1019 functions that use this format, such as file-attributes and
1020 format-time-string, have been changed accordingly. Old-format time
1021 stamps are still accepted.
1023 *** The format of timers in timer-list and timer-idle-list is now
1024 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1025 The PSECS slot is new, and uses picosecond resolution. It can be
1026 accessed via the new timer--psecs accessor.
1028 *** Last-modified time stamps in undo lists now are of the form
1029 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1032 ** Floating point functions now always return special values like NaN,
1033 instead of signaling errors, if given invalid args, e.g. (log -1.0).
1034 Previously, they returned NaNs on some platforms but signaled errors
1035 on others. The affected functions are acos, asin, tan, exp, expt,
1036 log, log10, sqrt, and mod.
1039 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1040 This can significantly speed up execution of non-byte-compiled code,
1041 but can also bump into previously unnoticed cyclic dependencies.
1042 These are generally harmless: they will simply cause the macro calls
1043 to be left for later expansion (as before), but will result in a
1044 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1045 You may wish to restructure your code so this does not happen.
1047 ** Miscellaneous new functions:
1049 *** `autoloadp' tests if its argument is an autoloaded object.
1051 *** `autoload-do-load' performs the autoloading operation.
1053 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1055 *** `file-name-base' returns a file name sans directory and extension.
1057 *** `function-get' fetches a function property, following aliases.
1059 *** `posnp' tests if an object is a `posn'.
1061 *** `set-temporary-overlay-map' sets up a temporary keymap that
1062 takes precedence over most other maps for a short while (normally one key).
1064 *** `system-users' returns the user names on the system.
1066 *** `system-groups' returns the group names on the system.
1068 *** `tty-top-frame' returns the topmost frame of a text terminal.
1071 ** New macros `setq-local' and `defvar-local'.
1073 ** Changes to special forms and macros
1075 *** `defun' and `defmacro' are now macros rather than special forms
1077 *** `kbd' is now a function rather than a macro.
1080 ** New fringe bitmap `exclamation-mark'.
1083 ** Face underlining can now use a wave.
1085 ** The following functions and variables are obsolete:
1087 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1089 *** `buffer-has-markers-at'
1091 *** `macro-declaration-function' (use `macro-declarations-alist')
1093 *** `window-system-version' (provides no useful information)
1095 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1097 *** `query-replace-interactive'
1099 *** `font-list-limit' (has had no effect since Emacs < 23)
1102 * Changes in Emacs 24.3 on non-free operating systems
1105 ** Cygwin builds can use the native MS Windows user interface.
1106 Pass --with-w32 to configure. The default remains the X11 interface.
1108 ** Two new functions are available in Cygwin builds:
1109 `cygwin-convert-file-name-from-windows' and
1110 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1111 code to access the Cygwin file-name mapping machinery to convert
1112 between Cygwin and Windows-native file and directory names.
1114 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1115 Emacs now supports mouse highlight, help-echo (in the echo area), and
1116 `mouse-autoselect-window'.
1119 ** On MS Windows Vista and later Emacs now supports symbolic links.
1122 ** On MS Windows, you can pass --without-libxml2 to configure.bat to omit
1123 support for libxml2, even if its presence is detected.
1126 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1129 ** On Mac OS X, configure no longer automatically adds the Fink /sw
1130 directories to the search path. You must add them yourself if you want them.
1133 * Changes in Emacs 24.2
1135 ** This is mainly a bug-fix release.
1138 * Installation Changes in Emacs 24.1
1140 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1141 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1142 also depend on Gtk+. You can disable them with --without-rsvg and
1145 ** Emacs can be compiled with GnuTLS support.
1146 This happens by default if a suitably recent version of the library is
1147 found at build time. To prevent this, use the configure option
1148 `--without-gnutls'. See below for GnuTLS features.
1150 ** Emacs can be compiled with SELinux support.
1151 This happens by default if a suitably recent version of the library is
1152 found at build time. To prevent this, use the configure option
1153 `--without-selinux'. See below for SELinux features.
1155 ** Emacs can be compiled with ImageMagick support.
1156 This happens by default if a suitably recent version of the library is
1157 found at build time. To prevent this, use the configure option
1158 `--without-imagemagick'. See below for ImageMagick features.
1159 This feature is not available for the Nextstep or MS ports.
1161 ** Emacs can be compiled with libxml2 support.
1162 This happens by default if a suitably recent version of the library is
1163 found at build time. To prevent this, use the configure option
1164 `--without-xml2'. See below for libxml2 features.
1166 ** By default, the installed Info and man pages are compressed.
1167 You can disable this by configuring --without-compress-info.
1169 ** New configure option --with-wide-int.
1170 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1171 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1174 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1175 These provide no new functionality, they just remove the need to edit
1176 lib-src/Makefile by hand in order to use the associated features.
1178 ** New configure option --enable-use-lisp-union-type.
1179 This is only useful for Emacs developers to debug certain types of bugs.
1180 This is not a new feature; only the configure flag is new.
1182 ** The standalone programs digest-doc and sorted-doc are removed.
1183 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1185 ** The standalone program `fakemail' is removed.
1186 If you need it, feedmail.el provides a superset of the functionality.
1189 * Startup Changes in Emacs 24.1
1191 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1192 command line arguments, and the EMACS_UNIBYTE environment variable, no
1193 longer have any effect. (They were declared obsolete in Emacs 23.)
1195 ** New command line option `--no-site-lisp' removes site-lisp directories
1196 from load-path. -Q now implies this. This option does not affect the
1197 EMACSLOADPATH environment variable (and hence has no effect for
1201 * Changes in Emacs 24.1
1205 *** Many packages now use the `completion-at-point' command,
1206 rather than implementing separate completion commands.
1208 *** `completion-at-point' now handles tags and semantic completion.
1210 *** Completion in a non-minibuffer now tries to detect the end of completion
1211 and pops down the *Completions* buffer accordingly.
1213 *** New option `completion-cycle-threshold' allows completion cycling.
1215 *** New option `completion-category-overrides' for overriding the
1216 default completion style in certain circumstances.
1218 *** New completion style `substring'.
1220 *** Completion of buffer names uses `substring' completion by default.
1222 *** The option `widget-complete-field' has been removed.
1226 *** The first time you try sending mail, Emacs asks for a mail method.
1227 This is implemented by a new default for `send-mail-function', which
1228 is `sendmail-query-once'. This offers to use the smtpmail package, or
1229 to use the old defaults relying on external mail facilities
1230 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1231 `mailclient-send-it' on Windows).
1233 *** Typing C-c m in the buffer made by M-x report-emacs-bug transfers
1234 the report to your desktop's preferred mail client, if there is one.
1235 This uses either the "xdg-email" utility, or Mac OS's "open" command.
1237 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1238 and Mail mode changes
1240 ** Emacs server and client changes
1242 *** New option `server-port' specifies the port for TCP Emacs servers.
1244 *** New emacsclient argument -q/--quiet suppresses some status messages.
1246 *** New emacsclient argument --frame-parameters specifies the frame
1247 parameters of any newly-created graphical frame.
1249 *** If emacsclient shuts down due to Emacs signaling an error,
1250 its exit status is 1.
1252 *** New emacsclient argument --parent-id ID.
1253 This opens a client frame in parent X window ID, via XEmbed, similar
1254 to the --parent-id argument to Emacs.
1256 ** Internationalization changes
1258 *** Emacs now supports display and editing of bidirectional text.
1259 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1260 displayed in the correct visual order as expected by users of those
1261 scripts. The display reordering is a "full bidirectionality" class
1262 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1263 with no RTL text should look exactly the same as before.
1265 **** New buffer-local variable `bidi-display-reordering'.
1266 To disable display reordering in a buffer, change this to nil.
1268 **** New buffer-local variable `bidi-paragraph-direction'.
1269 If nil (the default), Emacs determines the base direction of each
1270 paragraph from its text, as specified by the UBA. Setting the value
1271 to `right-to-left' or `left-to-right' forces a base direction on each
1274 Paragraphs with right-to-left base direction are displayed starting at
1275 the right window edge.
1277 *** Enhanced support for characters with no glyphs in available fonts,
1278 or, on text terminals, characters that cannot be encoded by the
1279 terminal coding system. The new option `glyphless-char-display-control'
1280 specifies how to display them: as a hexadecimal code in a box, a thin
1281 1-pixel space, an empty box, etc.
1283 *** New input methods for Farsi and Bulgarian
1284 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1286 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1287 (U+2010 and U+2011).
1289 *** New Hebrew translation of the Emacs Tutorial.
1290 Type `C-u C-h t' to choose it in case your language setup doesn't
1291 automatically select it.
1293 ** An Emacs Lisp package manager is now included.
1294 This is a convenient way to download and install additional packages,
1295 from a package repository at http://elpa.gnu.org.
1297 *** M-x list-packages shows a list of packages, which can be
1298 selected for installation.
1300 *** New command `describe-package', bound to `C-h P'.
1302 *** By default, all installed packages are loaded automatically when
1303 Emacs starts up. To disable this, set `package-enable-at-startup' to
1304 nil. To specify the packages to load, customize `package-load-list'.
1306 ** Custom theme changes
1308 *** New command `M-x customize-themes', which provides a convenient
1309 interface for enabling and disabling Custom themes.
1311 *** New option `custom-theme-load-path' is the load path for themes.
1312 Emacs no longer looks for Custom themes in `load-path'. The default
1313 value of `custom-theme-load-path' says to look for themes in
1314 `custom-theme-directory', followed by a subdirectory of
1315 `data-directory' named "themes/", which contains a small selection of
1316 built-in Custom themes.
1318 *** New option `custom-safe-themes' records known-safe theme files.
1319 If a theme is not in this list, Emacs queries before loading it, and
1320 offers to save the theme to `custom-safe-themes' automatically. By
1321 default, all themes included in Emacs are treated as safe.
1323 ** Improved GTK integration
1325 *** GTK scroll-bars are now placed on the right by default.
1326 The function `set-scroll-bar-mode' can change this.
1328 *** GTK tool bars can have just text, just images or images and text.
1329 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1330 the default is taken from desktop settings.
1332 *** GTK tool bars can be placed on any edge of the frame.
1333 The frame-parameter tool-bar-position controls this. It takes the
1334 values top, left, right or bottom. The Options => Show/Hide menu has
1337 *** The default colors for selected text (the `region' face) are taken
1338 from the GTK theme when Emacs is built with GTK.
1340 *** Emacs uses GTK tooltips by default if built with GTK.
1341 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1343 ** Graphical interface changes
1345 *** On graphical displays, the mode-line no longer ends in dashes.
1346 Also, the first dash (which does not indicate anything) is just
1347 displayed as a space.
1349 *** `menu-bar-select-buffer-function' lets you choose another operation
1350 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1352 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1353 built with Xft. These fonts can be set via X resources, for example:
1354 Emacs.pane.menubar.font: Courier-12
1358 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1359 or if it receives a SIGINT signal in batch mode.
1361 *** `kill-emacs-hook' is now also run in batch mode.
1362 Third-party code which adds to `kill-emacs-hook' should check if they
1363 do the right thing in batch mode.
1365 ** Scrolling changes
1367 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1368 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1369 of buffer at first key-press (instead they move to top/bottom of buffer)
1370 when `scroll-error-top-bottom' is non-nil.
1372 *** New option `scroll-error-top-bottom' (see above).
1374 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1375 scroll a line instead of full screen.
1377 *** New property `scroll-command' should be set on a command's symbol to
1378 define it as a scroll command affected by `scroll-preserve-screen-position'.
1380 *** If you customize `scroll-conservatively' to a value greater than 100,
1381 Emacs will never recenter point in the window when it scrolls due to
1382 cursor motion commands or commands that move point (e.f., `M-g M-g').
1383 Previously, you needed to use `most-positive-fixnum' as the value of
1384 `scroll-conservatively' to achieve the same effect.
1386 *** "Aggressive" scrolling now honors the scroll margins.
1387 If you customize `scroll-up-aggressively' or
1388 `scroll-down-aggressively' and move point off the window, Emacs now
1389 scrolls the window so as to avoid positioning point inside the scroll
1392 ** Basic SELinux support has been added.
1393 This requires Emacs to be linked with libselinux at build time.
1395 *** Emacs preserves the SELinux file context when backing up.
1396 Also, the function `copy-file' has an extra optional argument for
1397 preserving SELinux context, and the return value of `backup-buffer'
1398 now includes the SELinux context.
1400 *** New functions `file-selinux-context' and `set-file-selinux-context'
1401 get and set the SELinux context of a file.
1405 *** `delete-by-moving-to-trash' now only affects commands that specify
1406 trashing. This avoids inadvertently trashing temporary files.
1408 *** Calling `delete-file' or `delete-directory' with a prefix argument
1409 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1411 ** File- and directory-local variable changes
1413 *** You can stop directory local vars from applying to subdirectories.
1414 Add an element (subdirs . nil) to the alist portion of any variables
1415 settings to indicate that the section should not apply to
1418 *** Directory local variables can apply to some file-less buffers.
1419 Affected modes include dired, vc-dir, and log-edit. For example,
1420 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1421 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1422 `hack-dir-local-variables-non-file-buffer' to support this.
1424 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1425 Instead, use "eval: (minor-mode 1)".
1427 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1428 to `inhibit-local-variables-regexps'. As the name suggests, it now
1429 applies to ALL file local variables, not just -*- lines. The
1430 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1435 *** The `quit-window' command now restores the last buffer displayed
1436 in the quitted window.
1438 *** Resizing an Emacs frame now preserves proportional window sizes,
1439 modulo restrictions like window minimum sizes and fixed-size windows.
1441 *** The behavior of `display-buffer' is now customizable in detail.
1443 **** New option `display-buffer-base-action' specifies a list of
1444 user-determined display "actions" (functions and optional arguments
1445 for choosing the displaying window).
1447 This takes precedence over the default display action, which is
1448 specified by `display-buffer-fallback-action'.
1450 **** New option `display-buffer-alist' maps buffer name regexps to
1451 display actions, taking precedence over `display-buffer-base-action'.
1453 *** New option `window-combination-limit'.
1454 The new option `window-combination-limit' allows to return the space
1455 obtained for resizing or creating a window more reliably to the window
1456 from which such space was obtained.
1458 *** New option `window-combination-resize'.
1459 The new option `window-combination-resize' allows to split a window that
1460 otherwise cannot be split because it's too small by stealing space from
1461 other windows in the same combination. Subsequent resizing or deletion
1462 of the window will resize all windows in the same combination as well.
1464 *** New option `frame-auto-hide-function' lets you choose between
1465 iconifying or deleting a frame when burying a buffer in a dedicated
1466 frame, or quitting a window showing a buffer in a frame of its own.
1468 *** New commands `maximize-window' and `minimize-window'.
1469 These maximize and minimize the size of a window within its frame.
1471 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1472 These functions allow to navigate through the live buffers that have
1473 been shown in a specific window.
1475 ** Minibuffer changes
1477 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1478 This is handy for minibuffer-only frames, and is also used for the feature
1479 where mouse-1 pops up *Messages*"', which can now easily be changed.
1481 *** Minibuffers set `truncate-lines' to nil.
1482 If you want to change the value to something else, you could use
1483 for example `minibuffer-setup-hook'.
1485 ** `auto-mode-case-fold' is now enabled by default.
1487 ** `backup-by-copying-when-mismatch' now defaults to t.
1489 ** New basic faces `error', `warning', `success'.
1490 These are used to highlight text indicating failure, caution or
1491 successful operation.
1493 ** New option `list-colors-sort' defines the color sort order
1494 for `list-colors-display'.
1496 ** The variable `focus-follows-mouse' now always defaults to nil.
1499 * Editing Changes in Emacs 24.1
1503 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1504 `isearch-yank-line'.
1506 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1507 `isearch-yank-kill'.
1509 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1511 ** New commands `count-words-region' and `count-words'.
1513 *** M-= is bound to `count-words-region', not `count-lines-region'.
1514 The `count-words-region' command, when called interactively, reports
1515 the number of lines, words, and characters in the region. It is a
1516 superset of the old `count-lines-region', which is now an obsolete
1519 ** The command `just-one-space' (M-SPC), if given a negative argument,
1520 also deletes newlines around point.
1524 *** New option `delete-active-region'.
1525 If non-nil, [delete] and DEL delete the region if it is active and no
1526 prefix argument is given. If set to `kill', those commands kill
1529 *** New command `delete-forward-char', bound to [delete].
1530 This is meant for interactive use, and obeys `delete-active-region'.
1531 The command `delete-char' does not obey `delete-active-region'.
1533 *** `delete-backward-char' is now a Lisp function.
1534 Apart from obeying `delete-active-region', its behavior is unchanged.
1535 However, the byte compiler now warns if it is called from Lisp; Lisp
1536 callers should use delete-char with a negative argument instead.
1538 *** The option `mouse-region-delete-keys' has been deleted.
1540 ** Selection changes.
1542 The default handling of clipboard and primary selections has been
1543 changed to conform with modern X applications. In short, most
1544 commands for killing and yanking text now use the clipboard, while
1545 mouse commands use the primary selection.
1547 In the following, we provide a list of these changes, followed by a
1548 list of steps to get the old behavior back if you prefer that.
1550 *** `select-active-regions' now defaults to t.
1551 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1552 the kill ring. The selected text is put in the primary selection, if
1553 the system possesses a separate primary selection facility (e.g. X).
1555 **** `select-active-regions' also accepts a new value, `only'.
1556 This means to only set the primary selection for temporarily active
1557 regions (usually made by mouse-dragging or shift-selection);
1558 "ordinary" active regions, such as those made with C-SPC followed by
1559 point motion, do not alter the primary selection.
1561 **** `mouse-drag-copy-region' now defaults to nil.
1563 *** mouse-2 is now bound to `mouse-yank-primary'.
1564 This pastes from the primary selection, ignoring the kill-ring.
1565 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1567 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1569 *** `x-select-enable-primary' now defaults to nil.
1570 Thus, commands that kill text or copy it to the kill-ring (such as
1571 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1573 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1574 exactly equivalent to M-w, C-w, and C-y respectively.
1576 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1577 non-nil by default, as Windows does not support the primary selection
1578 between applications.
1580 *** To return to the previous behavior, do the following:
1582 **** Change `select-active-regions' to nil.
1583 **** Change `mouse-drag-copy-region' to t.
1584 **** Change `x-select-enable-primary' to t (on X only).
1585 **** Change `x-select-enable-clipboard' to nil.
1586 **** Bind `mouse-yank-at-click' to mouse-2.
1588 *** Support for X cut buffers has been removed.
1590 *** X clipboard managers are now supported.
1591 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1593 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1594 in the current rectangle. With a prefix argument, this prompts for a
1595 number to count from and for a format string.
1597 ** `redisplay-dont-pause' now defaults to t.
1598 This makes Emacs feel more responsive to editing commands that arrive
1599 at high rate, e.g. if you lean on some key, because stopping redisplay
1600 in the middle (when this variable is nil) forces more expensive
1601 updates later on, and Emacs appears to be unable to keep up.
1603 ** The behavior of <TAB> for active regions in Text mode has changed.
1604 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1605 when the region is active causes Emacs to indent all the lines in the
1606 region, aligning them with the line previous to the first line in the
1607 region (or with the left margin if there is no previous line).
1609 ** When `occur' is called with a prefix argument, matching strings are
1610 collected into the `*Occur*' buffer without line numbers. If there
1611 are parenthesized subexpressions in the specified regexp, `occur'
1612 reads replacement text that may contain \\& and \\N whose convention
1613 follows `replace-match'.
1616 * Changes in Specialized Modes and Packages in Emacs 24.1
1618 ** Archive Mode has basic support for browsing and updating 7z archives.
1622 *** BibTeX mode now supports biblatex.
1623 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1624 `bibtex-entry-field-alist' is now an obsolete alias for
1625 `bibtex-BibTeX-entry-alist'.
1627 *** New command `bibtex-search-entries', bound to C-c C-a.
1629 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1631 *** New variable `bibtex-search-entry-globally'.
1635 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1637 *** The default browser used by the package is now the "xdg-open" program,
1638 on platforms that support it. This calls your desktop's preferred browser.
1640 ** Calendar, Diary, and Appt
1642 *** Diary entries can contain non-printing "comments".
1643 See the variable `diary-comment-start'.
1645 *** Appointments can specify their individual warning times.
1646 See the variable `appt-warning-time-regexp'.
1648 *** The function specified by `appt-disp-window-function' may be passed
1649 lists of arguments if multiple appointments are due at similar times.
1650 If you are using a custom function for this, you should update it.
1652 *** New function `diary-hebrew-birthday'.
1654 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1655 may no longer be nil, but must all be strings.
1657 *** The obsolete (since Emacs 22.1) method of enabling the appt
1658 package by adding `appt-make-list' to `diary-hook' has been removed.
1659 Use `appt-activate' instead.
1661 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1662 appt-issue-message (use the function appt-activate)
1663 appt-visible/appt-msg-window (use the variable appt-display-format)
1665 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1666 view-diary-entries, list-diary-entries, show-all-diary-entries
1670 *** New feature to "guess" the style in an existing buffer.
1671 The main entry point is M-x c-guess.
1673 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1675 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1676 Thus C-M-a will, by default, go to the beginning of the immediate function,
1679 *** "Macros with semicolons" can be registered for correct indentation.
1680 Where such a macro ends a line (no semicolon) the next statement is no longer
1681 parsed as a statement continuation.
1683 ** Comint and modes derived from it use the standard completion code.
1687 *** Compilation mode can be used without Font Lock mode.
1688 `compilation-parse-errors-function' is now obsolete.
1690 *** New variable `compilation-filter-start', which is bound while
1691 `compilation-filter-hook' runs. It records the start position of the
1692 text inserted by `compilation-filter'.
1694 *** `compilation-error-screen-columns' and `compilation-first-column'
1695 are obeyed in the editing buffer. So programming language modes can
1696 set them, whereas previously only the value in the *Compilation*
1701 *** Customize buffers now contain a search field.
1702 The search is performed using `customize-apropos'.
1703 To turn off the search field, set `custom-search-field' to nil.
1705 *** Options in customize group buffers start out hidden if not customized.
1706 Use the arrow to the left of the option name to toggle visibility.
1708 *** custom-buffer-sort-alphabetically now defaults to t.
1710 *** The color widget now has a "Choose" button, which allows you to
1711 choose a color via `list-colors-display'.
1715 *** It is now possible to access buses other than the default system
1718 *** The `dbus-register-method' and `dbus-register-property' functions
1719 optionally do not register names.
1721 *** The new function `dbus-register-service' registers a known service
1722 name on a D-Bus without also registering a property or a method.
1726 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1727 if called with a prefix argument, read a file name from the minibuffer
1728 instead of using the current buffer.
1730 *** The "dired local variables" feature of Dired-x is obsolete.
1731 The standard directory local variables feature replaces it.
1735 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1736 controlling attempts to autojoin a channel.
1738 *** New variable `erc-coding-system-precedence': If we use `undecided'
1739 as the server coding system, this variable will then be consulted.
1740 The default is to decode strings that can be decoded as utf-8 as
1741 utf-8, and do the normal `undecided' decoding for the rest.
1745 *** The default value of `eshell-directory-name' has changed
1746 to be an "eshell" directory in `user-emacs-directory'.
1747 The old "~/.eshell/" directory is still used if it exists, though.
1751 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1752 It now supports multithread non-stop debugging and simultaneous
1753 debugging of several threads.
1757 *** RET (`image-toggle-animation') toggles animation, if applicable.
1758 Animation plays once, unless the option `image-animate-loop' is non-nil.
1762 *** New command M-x info-display-manual displays a named Info manual.
1763 If that manual is already visited in some Info buffer, it displays
1764 that buffer. (This is handy if you have many manuals in many *info*
1765 buffers, and don't remember the name of the buffer visiting the manual
1766 you want to consult.) Otherwise, it loads and displays the manual.
1768 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1769 This is for compatibility with the stand-alone Info reader program,
1770 and also because `Info-edit' is a rarely used command that is disabled
1773 ** Mail mode changes (not Message mode)
1775 *** New command M-x mail-add-attachment for adding MIME attachments
1777 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1778 (Its name is misleading, since it has nothing to do with MIME
1779 attachments.) The old name is now an obsolete alias to the new name.
1781 ** MH-E has been updated to MH-E version 8.3.1.
1782 See MH-E-NEWS for details.
1784 ** Modula-2 mode provides auto-indentation.
1786 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1788 ** nXML mode no longer binds C-RET to `nxml-complete'.
1789 Completion is now performed via `completion-at-point', bound to C-M-i
1790 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1791 default), this performs tag completion.
1793 ** Org mode has been updated to version 7.8.09.
1794 See ORG-NEWS for details.
1796 ** Prolog mode has been completely revamped, with lots of additional
1797 functionality such as more intelligent indentation, electricity,
1798 support for more variants, including Mercury, and a lot more.
1802 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1803 in the Rmail incoming message.
1805 *** The variable `rmail-message-filter' no longer has any effect.
1806 This change was made in Emacs 23.1 but was not advertised at the time.
1807 Try using `rmail-show-message-hook' instead.
1811 *** M-x shell prompts for the shell path name if the default directory
1812 is a remote file name and neither the environment variable $ESHELL nor
1813 the variable `explicit-shell-file-name' is set.
1815 *** TAB is now bound to the standard `completion-at-point' command,
1816 which now implements the pcomplete rules for shell command completion.
1820 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1821 if the mail server supports them. This uses either built-in GnuTLS
1822 support, or the starttls.el library. Customize `smtpmail-stream-type'
1825 *** The variable `smtpmail-auth-credentials' has been removed.
1826 By default, the information is now stored in the file ~/.authinfo.
1827 This was the default value of smtpmail-auth-credentials. If you had
1828 customized smtpmail-auth-credentials to a list of user names and
1829 passwords, those settings are not used. During your first connection
1830 to the smtp server, Emacs will prompt for the user name and password,
1831 and offer to save them to ~/.authinfo. Or you can manually copy the
1832 credentials to ~/.authinfo. For example, if you had
1834 (setq smtpmail-auth-credentials
1835 '(("mail.example.org" 25 "jim" "s!cret")))
1837 then the equivalent line in ~/.authinfo would be
1839 machine mail.example.org port 25 login jim password s!cret
1841 See the auth-source manual for more information, e.g. on encrypting
1842 the credentials file.
1844 *** The variable `smtpmail-starttls-credentials' has been removed.
1845 If you had that set, you need to put
1847 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1849 in your ~/.authinfo file instead.
1851 *** SMTPmail defaults to using the address in the From: header as the
1852 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1853 to the address you wish to use instead.
1857 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1858 and `sql-oracle-scan-on'.
1860 *** New options controlling prompting for login parameters.
1861 Each supported product has a custom variable `sql-*-login-params',
1862 which is a list of the parameters to be prompted for before a
1863 connection is established.
1865 *** The command `sql-product-interactive' now takes a prefix argument,
1866 which causes it to prompt for an SQL product.
1868 *** Product-specific SQL interactive commands now take prefix arguments.
1869 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1870 given a prefix argument, prompt for a name for the SQL interactive
1871 buffer. This reduces the need for calling `sql-rename-buffer'.
1873 *** SQL interactive modes suppress command continuation prompts, and
1874 replace tabs with spaces. The first change impacts multiple line SQL
1875 statements entered with C-j between each line, statements yanked into
1876 the buffer and statements sent with `sql-send-*' functions. The
1877 second prevents the MySQL and Postgres interpreters from listing
1878 object name completions when sent text via `sql-send-*' functions.
1880 *** New command `sql-connect' starts a predefined SQLi session,
1881 using the login parameters from `sql-connection-alist'.
1883 *** New "Save Connection" menu item in SQLi buffers.
1884 This gathers the login params specified for the SQLi session, if it
1885 was not started by a connection, and saves them as a new connection.
1887 *** New commands for listing database objects and details:
1888 sql-list-all and sql-list-table.
1890 *** An API for manipulating SQL product definitions has been added.
1894 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1898 *** New inline access method "ksu" (kerberized su).
1900 *** The following access methods are discontinued: "ssh1_old",
1901 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1903 *** The user option `remote-file-name-inhibit-cache' controls whether
1904 remote file attributes are cached for better performance.
1906 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1907 default value to "".
1909 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1910 for remote machines which support SELinux.
1912 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1913 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1914 the degree of parallelism.
1916 ** VC and related modes
1918 *** Support for pulling on distributed version control systems.
1919 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1920 supported (currently with Bzr, Git, and Mercurial), to update the
1921 current branch and working tree. A prefix argument means to prompt
1922 the user for specifics, e.g. a pull location.
1924 *** `vc-update' is now an alias for `vc-pull'.
1926 *** Support for merging on distributed version control systems.
1927 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1928 is supported (currently with Bzr, Git, and Mercurial), to merge
1929 changes from another branch into the current one. It prompts for
1930 specifics, e.g. a merge source.
1932 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1933 shows a diff while querying the user. It defaults to t.
1935 *** Log entries in some Log View buffers can be toggled to display a
1936 longer description by typing RET (log-view-toggle-entry-display).
1937 This is currently supported for Bzr, Git, and Mercurial (to support
1938 another backend, define a `log-view-expanded-log-entry-function').
1939 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1940 use this to display the full log entry for the revision at point.
1942 *** New command `vc-ediff' allows visual comparison of two revisions
1943 of a file similar to `vc-diff', but using ediff backend.
1945 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1946 this was not advertised at the time.
1948 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1949 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1950 this was not advertised at the time.
1956 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1958 *** partial-completion-mode (complete.el) is obsolete.
1959 You can get a comparable behavior with:
1960 (setq completion-styles '(partial-completion initials))
1961 (setq completion-pcm-complete-word-inserts-delimiters t)
1963 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1965 *** pgg is obsolete (use EasyPG instead).
1967 *** sregex.el is obsolete, since rx.el is a strict superset.
1969 *** s-region.el and pc-select.el are obsolete.
1970 They are superseded by shift-select-mode, enabled by default since 23.1.
1972 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1976 *** The Landmark game is now invoked with `landmark', not `lm'.
1977 Its functions and variables have been similarly renamed.
1979 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1980 (This interfered with cua-mode.)
1982 *** f90.el has some support for Fortran 2008 syntax.
1984 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1986 *** New command `nato-region' converts text to NATO phonetic alphabet.
1989 * New Modes and Packages in Emacs 24.1
1991 ** Occur Edit mode applies edits made in *Occur* buffers to the
1992 original buffers. It is bound to "e" in Occur mode.
1994 ** New global minor mode electric-pair-mode.
1995 When enabled, typing an open parenthesis automatically inserts the
1996 matching closing one.
1998 ** New global minor mode electric-indent-mode.
1999 When enabled, typing certain characters triggers reindentation.
2000 Major modes wishing to use this can set electric-indent-chars or
2001 electric-indent-functions.
2003 ** New global minor mode electric-layout-mode.
2004 When enabled, typing certain characters automatically inserts newlines.
2005 Major modes wishing to use this can set electric-layout-rules.
2007 ** tabulated-list.el provides a generic major mode for tabulated data,
2008 from which other modes can be derived.
2010 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2012 ** secrets.el is an implementation of the Secret Service API, an
2013 interface to password managers like GNOME Keyring or KDE Wallet. The
2014 Secret Service API requires D-Bus for communication. The command
2015 `secrets-show-secrets' offers a buffer with a visualization of the
2018 ** notifications.el provides an implementation of the Desktop
2019 Notifications API. It requires D-Bus for communication.
2021 ** soap-client.el supports access to SOAP web services from Emacs.
2022 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2024 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2026 ** New emacs-lock.el package.
2027 The previous version has been moved to obsolete/old-emacs-lock.el.
2028 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2029 against exiting Emacs and killing the buffer can be set separately.
2030 The mechanism for automatically turning off protection for buffers
2031 with dead inferior processes has been generalized.
2034 * Incompatible Lisp Changes in Emacs 24.1
2036 ** Passing a nil argument to a minor mode function call now ENABLES
2037 the minor mode unconditionally. This is so that you can write e.g.
2039 (add-hook 'text-mode-hook 'foo-mode)
2041 to enable foo-mode in Text mode buffers, removing the need for
2042 `turn-on-foo-mode' style functions. This affects all mode commands
2043 defined by `define-minor-mode'. If called interactively, the mode
2044 command still toggles the minor mode.
2046 ** The return value of `backup-buffer' has changed.
2047 It is now a list of three elements, where the second element is a list
2048 describing the original file's SELinux context. If Emacs or the
2049 system lacks SELinux support, the context list is (nil nil nil nil).
2050 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2052 ** `char-direction-table' and the `char-direction' function were deleted.
2053 They were buggy and inferior to the new support of bidirectional
2054 editing introduced in Emacs 24. If you need the bidirectional
2055 properties of a character, use `get-char-code-property' with the last
2056 argument `bidi-class'.
2058 ** `copy-directory' now copies the source directory as a subdirectory
2059 of the target directory, if the latter is an existing directory. The
2060 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2061 the contents directly into a pre-existing target directory.
2063 ** For mouse click input events in the text area, the Y pixel
2064 coordinate in the POSITION list now counts from the top of the text
2065 area, excluding any header line. Previously, it counted from the top
2068 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2069 been further reduced. Now a backquote not followed by a space is
2070 always treated as a "new-style" backquote. Please remove all
2071 "old-style" backquotes from your code. If your code uses backquotes
2072 as documented in the Elisp manual, and compiles without warning, then
2073 you have nothing to do in this regard. Code not following the
2074 appropriate conventions may fail to compile.
2076 The most common cause of trouble seems to be an old-style backquote
2077 followed by a newline. Another cause of trouble is vector notation
2078 for key sequence notation: instead of [(control ,)] and [(control ')],
2079 you should write [(control ?,)] and [(control ?')], which will work in
2082 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2083 was not advertised at the time. The function `custom-initialize-delay'
2084 replaced all known uses.
2086 ** `view-buffer' now treats special mode-class in the same way that
2087 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2088 major mode is special).
2090 ** Menu and tool bar changes
2092 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2093 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2094 With these alist entries omitted, `make-frame' checks the value of the
2095 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2096 a menu-bar or tool-bar, respectively. If the alist entries are added,
2097 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2099 *** The menu bar bindings's caches are not used any more.
2100 Use (where-is-internal <def> nil t) instead.
2102 ** Regions created by mouse dragging are now normal active regions,
2103 similar to those created by shift-selection (see Selection changes
2104 above). In previous Emacs versions, these regions were delineated by
2105 `mouse-drag-overlay'; that variable has been removed.
2107 ** The fourth argument of `filter-buffer-substring' has been removed.
2108 If you want to remove text properties from the final result, simply
2109 pass the result through substring-no-properties.
2111 ** cl.el no longer provides `cl-19'.
2113 ** The following obsolete functions and aliases have been removed
2114 (the appropriate new function is given in parentheses; "not needed"
2115 means you can just remove all calls to the function in question):
2117 *** `comint-kill-output' (`comint-delete-output')
2118 *** `decompose-composite-char' (`char-to-string')
2119 *** `outline-visible' (`outline-invisible-p')
2120 *** `internal-find-face' (`facep')
2121 *** `internal-get-face' (`facep and check-face')
2122 *** `frame-update-faces' (not needed)
2123 *** `frame-update-face-colors' (`frame-set-background-mode')
2124 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2125 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2126 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2127 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2128 *** `x-make-font-unbold' (`make-face-unbold')
2129 *** `x-make-font-unitalic' (`make-face-unitalic')
2130 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2131 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2132 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2133 *** `char-bytes' (== 1)
2134 *** `isearch-return-char' (`isearch-printing-char')
2135 *** `make-local-hook' (not needed)
2136 *** `set-screen-height' (`set-frame-height')
2137 *** `set-screen-width' (`set-frame-width')
2139 ** The following obsolete variables and varaliases have been removed
2140 (the appropriate new variable is given in parentheses):
2142 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2143 *** `vc-header-alist' (`vc-BACKEND-header')
2144 *** `directory-sep-char' (== ?/)
2145 *** `font-lock-defaults-alist' (`font-lock-defaults')
2146 *** `e' (`float-e').
2148 ** The following obsolete files were removed:
2149 sc.el, x-menu.el, rnews.el, rnewspost.el
2151 ** The format of the finder-inf.el file has changed, since the Finder
2152 mechanism is now based on the package system. The variable
2153 `finder-package-info' is replaced by `package--builtins' and
2154 `finder-keywords-hash'.
2156 ** When generating autoloads, `update-directory-autoloads' no longer
2157 assumes every inspected file is in your `load-path'. It instead
2158 generates relative names according to the current `load-path'.
2161 * Lisp changes in Emacs 24.1
2163 ** Code can now use lexical scoping by default instead of dynamic scoping.
2164 The `lexical-binding' variable enables lexical scoping for local
2165 variables. It is typically set via a file-local variable in the first
2166 line of the file, in which case it applies to all the code in that
2169 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2170 binding instead of the old dynamic binding mode.
2172 *** Lexically scoped interpreted functions are represented with a new form
2173 of function value which looks like (closure ENV ARGS &rest BODY).
2175 *** New macro `letrec' to define recursive local functions.
2177 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2178 So do `defcustom' and other forms that call `defvar' as a subroutine.
2180 *** New function `special-variable-p' to check whether a variable is
2181 declared as dynamically bound.
2183 *** The form ((lambda ...) ...) is deprecated.
2185 ** An Emacs Lisp testing tool is now included.
2186 Emacs Lisp developers can use this tool to write automated tests for
2187 their code. See the ERT info manual for details.
2189 ** Changes for bidirectional display and editing
2191 *** New function `current-bidi-paragraph-direction'.
2192 This returns the base direction of the paragraph at point.
2194 *** New function `bidi-string-mark-left-to-right'.
2195 Given a string containing characters from right-to-left scripts, this
2196 function returns another string which can be safely inserted into a
2197 buffer, such that any following text will be always displayed to the
2198 right of that string. (This works by appending an invisible Unicode
2199 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2201 This is useful when the buffer has overall left-to-right paragraph
2202 direction and you need to insert a string whose contents are not known
2203 in advance, without disrupting the layout of the line.
2207 *** Window tree functions are accessible in Elisp.
2208 Functions are provided to return the parent, siblings or child windows
2209 of any window including internal windows (windows not associated with a
2210 buffer) in the window tree.
2212 **** New function `window-valid-p' gives non-nil for live and internal
2215 **** Window manipulation can deal with internal windows.
2216 Many window handling functions like `split-window', `delete-window', or
2217 `delete-other-windows' as well as the window resizing functions can now
2218 act on any window including internal ones.
2220 *** window-total-height/-width vs window-body-height/-width.
2221 The function `window-height' has been renamed to `window-total-height'
2222 and `window-width' has been renamed to `window-body-width'. The old
2223 names are provided as aliases. Two new functions `window-total-width'
2224 and `window-body-height' are provided.
2226 *** Window parameters specific to window handling functions.
2227 For each window you can specify a parameter to override the default
2228 behavior of a number of functions like `split-window', `delete-window'
2229 and `delete-other-windows'. The variable `ignore-window-parameters'
2230 allows to ignore processing such parameters.
2232 *** New semantics of third argument of `split-window'.
2233 The third argument of `split-window' has been renamed to SIDE and can be
2234 set to any of the values 'below, 'right, 'above, or 'left to make the
2235 new window appear on the corresponding side of the window that shall be
2236 split. Any other value of SIDE will cause `split-window' to split the
2237 window into two side-by-side windows as before.
2239 *** Window resizing functions.
2240 A new standard function for resizing windows called `window-resize' has
2241 been introduced. This and all other functions for resizing windows no
2242 longer delete any windows when they become too small.
2244 *** Deleting the selected window now selects the most recently selected
2245 live window on that frame instead.
2247 *** `adjust-window-trailing-edge' adjustments.
2248 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2249 is able to resize other windows if a window adjacent to the trailing
2250 edge cannot be shrunk any more. This makes its behavior more similar to
2251 that of Emacs 21 without compromising, however, its inability to delete
2252 windows which was introduced in Emacs 22.
2254 *** Window-local buffer lists.
2255 Windows now have local buffer lists. This means that removing a buffer
2256 from display in a window will preferably show the buffer previously
2257 shown in that window with its previous window-start and window-point
2258 positions. This also means that the same buffer may be automatically
2259 shown twice even if it already appears in another window.
2261 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2262 which if non-nil requires the buffer to be displayed in the currently
2263 selected window, signaling an error otherwise. If nil, another window
2264 can be used, e.g. if the selected one is strongly dedicated.
2266 *** `split-window-vertically' and `split-window-horizontally' renamed
2267 to `split-window-below' and `split-window-right' respectively.
2268 The old names are kept as aliases.
2272 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2273 named ACTION, and takes a display action of the same form as
2274 `display-buffer-base-action' (see Changes, above). A non-nil,
2275 non-list value is treated specially, as the old meaning.
2277 **** New variable `display-buffer-overriding-action'.
2279 **** The procedure of `display-buffer' etc. to choose a window is
2280 determined by combining `display-buffer-overriding-action',
2281 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2282 and `display-buffer-fallback-action'. The second and fourth of these
2283 are user-customizable variables.
2285 See the docstring of `display-buffer' for details.
2287 *** New functions `window-state-get' and `window-state-put'.
2288 These functions allow to save and restore the state of an arbitrary
2289 frame or window as an Elisp object.
2293 *** New variable `completion-extra-properties' used to specify extra
2294 properties of the current completion:
2295 - :annotate-function, same as the old completion-annotate-function.
2296 - :exit-function, function to call after completion took place.
2298 *** Functions on `completion-at-point-functions' can return any of the
2299 properties valid for `completion-extra-properties'.
2301 *** `completion-annotate-function' is obsolete.
2303 *** New `metadata' method for completion tables. The metadata thus returned
2304 can specify various details of the data returned by `all-completions':
2305 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2306 used to select a style in completion-category-overrides.
2307 - `annotation-function' to add annotations in *Completions*.
2308 - `display-sort-function' to specify how to sort entries in *Completions*.
2309 - `cycle-sort-function' to specify how to sort entries when cycling.
2311 *** `minibuffer-local-filename-must-match-map' is not used any more.
2312 Instead, the bindings in `minibuffer-local-filename-completion-map'
2313 are combined with `minibuffer-local-must-match-map'.
2315 *** New variable `completing-read-function' allows overriding the
2316 behavior of `completing-read'.
2318 ** `glyphless-char-display' can now distinguish between graphical and
2319 text terminal display, via a char-table entry that is a cons cell.
2321 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2322 Instead, the offending function is removed.
2326 *** New function `run-hook-wrapped' for running an abnormal hook by
2327 passing the hook functions as arguments to a "wrapping" function.
2328 Like `run-hook-with-args-until-success', it stops at the first
2329 non-nil return value.
2331 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2332 set of "wrapping" filters, similar to around advice.
2333 (A version of this macro was actually added in Emacs 23.2 but was not
2334 advertised at the time.)
2338 *** New macro `condition-case-unless-debug' (this was actually added in
2339 Emacs 23.1 as condition-case-no-debug, but not advertised)
2341 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2343 *** Variable `stack-trace-on-error' removed.
2345 *** The debugger can now "continue" from an error, which means it will
2346 jump to the error handler as if the debugger had not been invoked
2347 instead of jumping all the way to the top-level.
2349 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2350 This can be useful when `inhibit-quit' is set.
2352 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2353 named Emacs server instances.
2355 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2356 to redirect STDOUT to a file.
2358 ** The function `format-time-string' now supports the %N directive,
2359 for higher-resolution time stamps.
2361 ** New input reading functions
2363 *** New function `read-char-choice' reads a restricted set of
2364 characters, discarding any inputs not inside the set.
2366 *** The command `read-color' now requires a match for a color name
2367 or RGB triplet, instead of signaling an error if the user provides
2370 **** `facemenu-read-color' is now an alias for `read-color'.
2372 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2373 The variable is now used to load all kind of supported dynamic libraries,
2374 not just image libraries. The previous name is still available as an
2377 ** Syntax parsing changes
2379 *** New variable `syntax-propertize-function'.
2380 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2381 This allows syntax-table properties to be set independently from font-lock:
2382 just call syntax-propertize to make sure the text is propertized.
2383 Together with this new variable come a new hook
2384 syntax-propertize-extend-region-functions, as well as two helper functions:
2385 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2386 as-is; and syntax-propertize-rules which provides a new way to specify
2389 *** Syntax tables support a new "comment style c" additionally to style b.
2391 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2393 ** frame-local variables cannot be let-bound any more.
2395 ** Major and minor mode changes
2397 *** `set-auto-mode' now respects mode: local variables at the end of files,
2398 as well as those in the -*- line.
2400 *** `prog-mode' is a new major mode from which programming modes
2403 **** `prog-mode-hook' can be used to enable features for programming
2404 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2405 on-the-fly spell checking for comments and strings.
2407 *** New hook `change-major-mode-after-body-hook', run by
2408 `run-mode-hooks' just before any other mode hooks.
2410 *** Enabled globalized minor modes can be disabled in specific major modes.
2411 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2412 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2414 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2416 ** File-handling changes
2418 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2419 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2420 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2421 argument is supplied (see Trash changes, above).
2423 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2425 ** Tool-bars can display separators.
2426 Tool-bar separators are handled like menu separators in menu-bar maps,
2427 i.e. via menu entries of the form `(menu-item "--")'.
2431 *** Animated images support (currently animated gifs only).
2433 **** `image-animated-p' returns non-nil if an image can be animated.
2435 **** `image-animate' animates a supplied image spec.
2437 **** `image-animate-timer' returns the timer object for an image that
2440 *** `image-extension-data' has been renamed to `image-metadata'.
2441 The old name is an obsolete alias to the new one.
2443 *** Image mode can view any image type that ImageMagick supports.
2444 This requires Emacs to be built with ImageMagick support.
2446 **** New function `imagemagick-types', defined if ImageMagick support
2447 is enabled, returns a list of image file extensions that your
2448 ImageMagick installation supports.
2450 **** New function `imagemagick-register-types' enables ImageMagick
2451 image types in Image mode and in `create-image' and other helper
2454 **** New option `imagemagick-types-inhibit' excludes certain
2455 ImageMagick image types from `imagemagick-register-types'.
2457 **** With ImageMagick support, there are extra Image mode commands to
2458 resize and rotate images: `image-transform-fit-to-height',
2459 `image-transform-fit-to-width', `image-transform-set-rotation', and
2460 `image-transform-set-scale'.
2462 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2463 passes it to the mail user agent function. This argument specifies an
2464 action for returning to the caller after finishing with the mail. For
2465 example, this is used by Rmail to optionally delete a mail window.
2467 ** XML and HTML parsing
2468 If Emacs is compiled with libxml2 support, there are two new
2469 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2470 and `libxml-parse-xml-region' (which parses XML). Both return an
2471 Emacs Lisp parse tree.
2473 ** Networking and encryption changes
2475 *** `open-network-stream' can now be used to open an encrypted stream.
2476 It now accepts an optional `:type' parameter for initiating a TLS
2477 connection, directly or via STARTTLS. To do STARTTLS, additional
2478 parameters (`:end-of-command', `:success', `:capabilities-command')
2479 must also be supplied.
2481 *** New library gnutls.el.
2482 The new function `gnutls-available-p' returns non-nil if Emacs is
2483 built with GnuTLS support. The main entry points are
2484 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2485 these functions through `open-network-stream', because that can
2486 upgrade connections through STARTTLS opportunistically or use plain
2487 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2490 *** New primitive `secure-hash' that supports many secure hash algorithms:
2491 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2492 sha1.el has been removed. The `sha1' feature is provided by default.
2496 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2498 ** Progress reporters can now "spin".
2499 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2500 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2501 time you call `progress-reporter-update' on that progress reporter,
2502 with a nil or omitted VALUE argument, the reporter message is
2503 displayed with a "spinning bar".
2505 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2506 being reverted, even if the buffer has a local `revert-buffer-function'.
2508 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2509 If delayed-warnings-list is non-nil, the command loop calls
2510 `delayed-warnings-hook' after `post-command-hook'. At present, this
2511 is only used by Emacs on some platforms to display warnings during
2512 startup, which might otherwise not be noticed. This uses the
2513 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2515 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2517 ** New function `make-composed-keymap' that constructs a new keymap
2518 from multiple input maps. You can use this to make a keymap that
2519 inherits from multiple maps, eg:
2520 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2522 ** New function `string-prefix-p'.
2523 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2525 ** New reader macro ## that stands for the empty symbol.
2526 This means that the empty symbol can now be read back. Also, #: by itself
2527 (when not immediately followed by a possible symbol character) stands for
2528 an empty uninterned symbol.
2530 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2532 ** The following functions and variables are obsolete:
2534 *** `tooltip-use-echo-area' is obsolete.
2535 Rather than setting this to t, disable Tooltip mode instead.
2537 *** buffer-substring-filters is obsolete.
2538 Use `filter-buffer-substring-functions' instead.
2540 *** `byte-compile-disable-print-circle' is obsolete.
2542 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2543 Use `post-command-hook' instead.
2545 *** `font-lock-maximum-size' is obsolete.
2548 * Changes in Emacs 24.1 on non-free operating systems
2550 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2551 and also when HOME is set to C:\ by default.
2553 ** New configure.bat options
2555 *** --enable-checking builds Emacs with extra runtime checks.
2557 *** --distfiles specifies files to be included in binary distribution.
2559 *** --without-gnutls disables automatic GnuTLS detection.
2561 *** --lib for general library linkage, works with the USER_LIBS build variable.
2563 ** New make target `dist' to create binary distribution for MS Windows.
2565 ** The Lisp function `w32-default-color-map' is now obsolete.
2566 (It is only used internally in the Emacs C code.)
2568 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2569 reappear on mouse-over. (Requires OS X 10.6 or later.)
2571 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2572 other platforms, rather than inserting its contents into the buffer.
2575 ----------------------------------------------------------------------
2576 This file is part of GNU Emacs.
2578 GNU Emacs is free software: you can redistribute it and/or modify
2579 it under the terms of the GNU General Public License as published by
2580 the Free Software Foundation, either version 3 of the License, or
2581 (at your option) any later version.
2583 GNU Emacs is distributed in the hope that it will be useful,
2584 but WITHOUT ANY WARRANTY; without even the implied warranty of
2585 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2586 GNU General Public License for more details.
2588 You should have received a copy of the GNU General Public License
2589 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2594 paragraph-separate: "[
\f]*$"