1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 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 * Installation Changes in Emacs 24.3
20 ** The default X toolkit is now Gtk+ version 3.
21 If you don't pass `--with-x-toolkit' to configure, or if you use
22 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
23 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
24 You can explicitly require a specific version by passing
25 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
27 ** New configure option `--enable-link-time-optimization', to utilize
28 an appropriate feature provided by GCC since version 4.5.0.
30 ** New configure option `--without-all' to disable most of the optional
31 features (image support, etc.) that are normally enabled by default.
33 ** New configure option `--enable-gcc-warnings' (for developing/debugging
34 Emacs). If building with GCC, this enables compile-time checks that
35 warn/give errors about possibly-questionable C code. On a recent GNU
36 system there should be no warnings; on older and on non-GNU systems
37 the results may be useful to developers.
39 ** The configure option `--enable-use-lisp-union-type' has been
40 renamed to `--enable-check-lisp-object-type', as the resulting
41 Lisp_Object type no longer uses a union to implement the compile time
42 check that this option enables.
44 ** The configure option `--disable-maintainer-mode' has been removed,
45 as it was confusingly-named and rarely useful.
47 ** The configure options `--program-prefix', `--program-suffix', and
48 `--program-transform-name' apply to more than just the installed
49 binaries. Now they also affect the man pages, icons, and the
50 etc/emacs.desktop file; but not the info pages, since this would break
51 links between the various manuals.
53 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
54 overwriting "emacs" in the installation bin/ directory with a link
57 ** Emacs uses libtinfo in preference to libncurses, if available.
59 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
60 /usr/pkg/lib to the linker search path. You must add them yourself if
63 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
64 (from the bin and libexec directories, respectively). The former is
65 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
68 * Startup Changes in Emacs 24.3
70 ** Emacs no longer searches for `leim-list.el' files beneath the standard
71 lisp/ directory. There should not be any there anyway. If you have
72 been adding them there, put them somewhere else; e.g., site-lisp.
74 ** The `--no-site-lisp' command line option now works for Nextstep builds.
77 * Changes in Emacs 24.3
81 *** `C-h f' (`describe-function') can now perform autoloading.
82 When this command is called for an autoloaded function whose docstring
83 contains a key substitution construct, that function's library is
84 automatically loaded, so that the documentation can be shown
85 correctly. To disable this, set `help-enable-auto-load' to nil.
87 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
88 even after their associated libraries have been loaded (and the
89 autoloads have been redefined as functions).
93 *** Images displayed via ImageMagick now support transparency and the
94 :background image specification property.
96 *** When available, ImageMagick support is automatically enabled.
97 It is no longer necessary to call `imagemagick-register-types'
98 explicitly to install ImageMagick image types; that function is called
99 automatically at startup, or when customizing an imagemagick- option.
101 *** Setting `imagemagick-types-inhibit' to t now disables the use of
102 ImageMagick to view images. (You must call `imagemagick-register-types'
103 afterwards if you do not use customize to change this.)
105 *** The new variable `imagemagick-enabled-types' also affects which
106 ImageMagick types are treated as images. The function
107 `imagemagick-filter-types' returns the list of types that will be
112 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
113 next and previous path separator, respectively.
115 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
116 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
117 non-nil before enabling the mode.
121 *** New option `mode-line-default-help-echo' specifies the help text
122 (shown in a tooltip or in the echo area) for any part of the mode line
123 that does not have its own specialized help text.
125 *** You can now click mouse-3 in the coding system indicator to invoke
126 `set-buffer-file-coding-system'.
130 *** emacsclient now obeys string values for `initial-buffer-choice',
131 if it is told to open a new frame without specifying any file to visit
132 or expression to evaluate.
134 *** New option `server-auth-key' specifies a shared server key.
136 ** Emacs now generates backtraces on fatal errors.
137 On encountering a fatal error, Emacs now outputs a textual description
138 of the fatal signal, and a short backtrace on platforms like glibc
139 that support backtraces.
141 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
142 This minor mode replaces `toggle-read-only', which is now obsolete.
144 ** Most `y-or-n' prompts now allow you to scroll the selected window.
145 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
146 respectively, without exiting from the prompt.
148 ** In the Package Menu, newly-available packages are listed as "new",
149 and sorted above the other "available" packages by default.
151 ** If your Emacs was built from a bzr checkout, the new variable
152 `emacs-bzr-version' contains information about the bzr revision used.
154 ** New option `create-lockfiles' specifies usage of lockfiles.
155 It defaults to t. Changing it to nil inhibits the creation of lock
156 files (use this with caution).
158 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
159 variables on remote hosts.
161 ** The entry for PCL-CVS has been removed from the Tools menu.
162 The PCL-CVS commands are still available via the keyboard.
164 ** Using "unibyte: t" in Lisp source files is obsolete.
165 Use "coding: raw-text" instead.
167 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
168 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
169 The previous binding, introduced in Emacs 24.1, was a mistake, because
170 `C-c LETTER' bindings are reserved for user customizations.
172 ** Internationalization
174 *** New language environment: Persian.
176 *** New input method `vietnamese-vni'.
178 ** Nextstep (GNUstep / Mac OS X) port
180 *** Support for fullscreen and the frame parameter fullscreen.
182 *** A file dialog is used for open/save operations initiated from the
186 * Editing Changes in Emacs 24.3
188 ** Search and Replace
190 *** Non-regexp Isearch now performs "lax" space matching.
191 Each sequence of spaces in the supplied search string may match any
192 sequence of one or more whitespace characters, as specified by the
193 variable `search-whitespace-regexp'. (This variable is also used by a
194 similar existing feature for regexp Isearch.)
196 *** New Isearch command `M-s SPC' toggles lax space matching.
197 This applies to both ordinary and regexp Isearch.
199 *** New option `replace-lax-whitespace'.
200 If non-nil, `query-replace' uses flexible whitespace matching too.
203 *** Global `M-s _' starts a symbol (identifier) incremental search,
204 and `M-s _' in Isearch toggles symbol search mode.
205 `M-s c' in Isearch toggles search case-sensitivity.
207 ** Navigation commands
209 *** New binding `M-g c' for `goto-char'.
211 *** New binding `M-g TAB' for `move-to-column'.
213 *** `M-g TAB' (`move-to-column') prompts for a column number if called
214 interactively with no prefix arg. Previously, it moved to column 1.
216 ** New option `yank-handled-properties' allows processing of text
217 properties on yanked text, in ways that are more general than just
218 removing them (as is done by `yank-excluded-properties').
220 ** New option `delete-trailing-lines' specifies whether
221 M-x delete-trailing-whitespace should delete trailing lines at the end
222 of the buffer. It defaults to t.
224 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
226 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
227 `ucs-insert' is now an obsolete alias for `insert-char'.
229 ** The `z' key no longer has a binding in most special modes.
230 It used to be bound to `kill-this-buffer', but `z' is too easy to
233 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
234 It copies the region-rectangle as the last rectangle kill.
238 *** `C-x r +' is now overloaded to invoke `append-to-register'.
240 *** New option `register-separator' specifies the register containing
241 the text to put between collected texts for use with
242 M-x append-to-register and M-x prepend-to-register.
245 * Changes in Specialized Modes and Packages in Emacs 24.3
247 ** Common Lisp emulation (CL)
249 *** CL's main entry is now (require 'cl-lib).
250 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
251 i.e., all its definitions have the "cl-" prefix (and internal definitions
252 use the "cl--" prefix).
254 If `cl' provided a feature under the name `foo', then `cl-lib'
255 provides it under the name `cl-foo' instead; with the exceptions of the
256 few `cl' definitions that had to use `foo*' to avoid conflicts with
257 pre-existing Elisp entities. These have been renamed to `cl-foo'
258 rather than `cl-foo*'.
260 The old `cl' is now deprecated and is mainly just a bunch of aliases that
261 provide the old, non-prefixed names. Some exceptions are listed below:
263 *** `cl-flet' is not like `flet' (which is deprecated).
264 Instead it obeys the behavior of Common-Lisp's `flet'.
265 In particular, in cl-flet function definitions are lexically scoped,
266 whereas in flet the scoping is dynamic.
268 *** `cl-labels' is slightly different from `labels'.
269 The difference is that it relies on the `lexical-binding' machinery
270 (as opposed to the `lexical-let' machinery used previously) to capture
271 definitions in closures, so such closures will only work if `lexical-binding'
274 *** `cl-letf' is not exactly like `letf'.
275 The only difference is in details that relate to some deprecated usage
276 of `symbol-function' in place forms.
278 *** `progv' was rewritten to use the `let' machinery.
279 A side effect is that variables without corresponding values are bound
280 to nil rather than being made unbound.
282 *** The following methods of extending `setf' are obsolete
283 (use features from gv.el instead):
284 `define-modify-macro' (use `gv-letplace')
285 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
286 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
287 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
291 *** Changes are now highlighted using the same color scheme as in
292 modern VCSes. Deletions are displayed in red (new faces
293 `diff-refine-removed' and `smerge-refined-removed', and new definition
294 of `diff-removed'), insertions in green (new faces `diff-refine-added'
295 and `smerge-refined-added', and new definition of `diff-added').
297 *** The variable `diff-use-changed-face' defines whether to use the
298 face `diff-changed', or `diff-removed' and `diff-added' to highlight
299 changes in context diffs.
301 *** The new command `diff-delete-trailing-whitespace' removes trailing
302 whitespace introduced by a diff.
304 ** Ediff now uses the same color scheme as Diff mode.
308 A new version of python.el, which provides several new features, including:
309 per-buffer shells, better indentation, Python 3 support, and improved
310 shell-interaction compatible with iPython (and virtually any other
313 *** Some user options have been replaced/renamed, including (old -> new):
314 **** python-indent -> python-indent-offset
315 **** python-guess-indent -> python-indent-guess-indent-offset
316 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
317 **** python-use-skeletons -> python-skeleton-autoinsert
319 *** Some user options have been removed, including:
321 **** `python-indent-string-contents': Strings are never indented.
323 **** `python-honour-comment-indentation':
324 Comments are always considered as indentation markers.
326 **** `python-continuation-offset': Indentation is automatically
327 calculated in a pep8 compliant way depending on the context.
329 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
330 Have no direct mapping as the shell interaction is completely different.
332 **** `python-python-command', `python-jython-command':
333 Replaced by `python-shell-interpreter'.
335 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
336 `python-pdbtrack-minor-mode-string', `python-source-modes':
339 *** Some commands have been replaced (old -> new):
340 **** python-insert-class -> python-skeleton-class
341 **** python-insert-def -> python-skeleton-def
342 **** python-insert-for -> python-skeleton-for
343 **** python-insert-if -> python-skeleton-if
344 **** python-insert-try/except -> python-skeleton-try
345 **** python-insert-try/finally -> python-skeleton-try
346 **** python-insert-while -> python-skeleton-while
347 **** python-find-function -> python-nav-jump-to-defun
348 **** python-next-statement -> python-nav-forward-sentence
349 **** python-previous-statement -> python-nav-backward-sentence
350 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
351 **** python-end-of-defun-function -> python-nav-end-of-defun
352 **** python-send-buffer -> python-shell-send-buffer
353 **** python-send-defun -> python-shell-send-defun
354 **** python-send-region -> python-shell-send-region
355 **** python-send-region-and-go -> emulate with python-shell-send-region
356 and python-shell-switch-to-shell
357 **** python-send-string -> python-shell-send-string
358 **** python-switch-to-python -> python-shell-switch-to-shell
359 **** python-describe-symbol -> python-eldoc-at-point
363 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
365 *** The D-Bus object manager interface is implemented.
367 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
368 if their value does not fit into Emacs's integer range.
370 *** The function `dbus-call-method' is now non-blocking.
371 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
373 *** Signals can also be sent as unicast messages.
375 *** The argument list of `dbus-register-signal' has been extended,
376 according to the new match rule types of D-Bus.
378 *** `dbus-init-bus' supports private connections.
380 *** There is a new function `dbus-setenv'.
382 ** `desktop-path' no longer includes the "." directory.
383 Desktop files are now located in ~/.emacs.d by default.
387 *** `dired-do-async-shell-command' executes each file sequentially
388 if the command ends in `;' (when operating on multiple files).
389 Otherwise, it executes the command on each file in parallel.
391 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
392 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
395 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
396 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
397 mark/unmark/flag all files in the active region.
399 *** The minibuffer default for `=' (`dired-diff) has changed.
400 It is now the backup file for the file at point, if one exists.
401 In Transient Mark mode the default is the file at the active mark.
403 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
404 The global binding for `M-=', `count-words-region' is in effect.
408 *** New module "notifications", which can send a notification when you
409 receive a private message or your nickname is mentioned.
411 *** ERC will look up server/channel names via auth-source and use any
414 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
415 only applies to messages sent by lurkers.
417 ** reStructuredText mode
419 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
420 fontification, comment handling, and customization have all been revised
423 *** Support for `imenu' and `which-function-mode'.
425 *** The reStructuredText syntax is more closely covered.
426 Sphinx support has been improved.
428 *** `rst-insert-list' inserts new list or continues existing lists.
430 *** A negative prefix argument always works for `rst-adjust'.
432 *** The window configuration is reset after displaying a TOC.
434 *** The constant `rst-version' describes the rst.el package version.
438 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
440 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
442 *** `sh-use-smie' lets you choose a new indentation and navigation code.
446 *** The free software compiler GHDL is supported (and now the default).
448 *** Support for the VHDL-AMS packages has been added/updated.
450 *** Updated to the 2002 revision of the VHDL standard.
452 *** Accepts \r and \f as whitespace.
456 *** The faces used by Apropos are now directly customizable.
457 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
458 see the `apropos' Custom group for details.
460 *** The old options whose values specified faces to use have been removed
461 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
465 *** This package has been rewritten to use Tabulated List mode.
467 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
468 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
472 *** You can customize the header text that appears above each calendar month.
473 See the variable `calendar-month-header'.
475 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
477 *** The calendars produced by cal-html include holidays.
478 Customize `cal-html-holidays' to change this.
480 ** Compile has a new option `compilation-always-kill'.
484 *** `custom-reset-button-menu' now defaults to t.
486 *** Non-option variables are never matched in `customize-apropos' and
487 `customize-apropos-options' (i.e., the prefix argument does nothing for
492 *** The variables `term-default-fg-color' and `term-default-bg-color'
493 are now deprecated in favor of the customizable face `term'.
495 *** You can customize how to display ANSI terminal colors and styles
496 by customizing the corresponding `term-color-<COLOR>',
497 `term-color-underline' and `term-color-bold' faces.
501 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
503 *** Remote processes are now also supported on remote MS-Windows hosts.
507 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
508 Previously, this slot stored semicolon-separated attribute-value pairs
509 appended to some imap URLs, but this is not compatible with RFC 3986.
510 So now the `filename' slot stores the entire path and query components,
511 and the `attributes' slot is always nil.
513 *** New function `url-encode-url' for encoding a URI string.
514 The `url-retrieve' function now uses this to encode its URL argument,
515 in case that is not properly encoded.
519 *** The major modes from the parser generators "Bovine" and "Wisent"
520 are now properly integrated within Emacs. The file suffixes ".by" and
521 ".wy" are registered in `auto-mode-alist', and the corresponding
522 manuals are now included.
526 **** Menu support for the "Configuration" feature. Allows users to choose the
527 active configuration (such as debug or install) from the menu.
528 **** `ede-set': New command to interactively set project-local variables.
529 **** Support for compiling, debugging, and running in "generic" projects.
530 **** Autoconf editing support for M4 macros with complex arguments.
531 **** Support compilation for "linux" project type.
532 **** "simple" projects were removed; use "generic" projects instead.
536 **** (C/C++) Support for parsing #include statements inside a namespace.
537 **** (C/C++) Improved support for 'extern "C"' declarations.
538 **** (C/C++) Support to ignore more common special preprocessor symbols, such as
539 '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++. If
540 available, include cdefs.h as an additional source of preprocessor symbols.
541 **** (C/C++) Improved function pointer parsing.
542 **** (Python) Support for converting imports to include file names.
543 **** (Python) Ability to dynamically determine the load path.
544 **** (Python) Support for 'WITH' and 'AT' keywords.
545 **** Improved tooltip completion.
549 **** The SRecode manual is now included.
550 **** Tag generation supports constructor/destructor settings and system include
552 **** Added a 'Framework' support: Frameworks are specified when a particular
553 kind of library (such as Android) is needed in a common language mode (like
555 **** Support nested templates and let variables override based on priority.
556 **** Support merging tables from multiple related modes, such as
557 default -> c++ -> arduino.
559 ** notifications.el supports now version 1.2 of the Notifications API.
560 The function `notifications-get-capabilities' returns the supported
563 ** Flymake uses fringe bitmaps to indicate errors and warnings.
564 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
565 `flymake-warning-bitmap'.
567 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
568 specifying URL types that should be converted to remote file names at
569 the FFAP prompt. The default is now '("ftp").
571 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
572 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
574 ** New option `mouse-avoidance-banish-position' specifies where the
575 `banish' mouse avoidance setting moves the mouse.
577 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
578 closing brackets to be aligned with the line of the opening bracket.
580 ** In Proced mode, new command `proced-renice' renices marked processes.
582 ** New option `async-shell-command-buffer' specifies the buffer to use
583 for a new asynchronous `shell-command' when the default output buffer
584 `*Async Shell Command*' is already in use.
586 ** SQL mode has a new option `sql-db2-escape-newlines'.
587 If non-nil, newlines sent to the command interpreter will be escaped
588 by a backslash. The default does not escape the newlines and assumes
589 that the sql statement will be terminated by a semicolon.
591 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
592 (and modes that derive from it), sorts the column at point, or the Nth
593 column if a numeric prefix argument is given.
595 ** `which-func-modes' now defaults to t, so Which Function mode, when
596 enabled, applies to all applicable major modes.
598 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
601 ** Follow mode no longer works by using advice.
602 The option `follow-intercept-processes' has been removed.
604 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
606 ** Hooks renamed to avoid obsolete "-hooks" suffix:
607 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
608 *** semantic-change-hooks -> semantic-change-functions
609 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
610 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
611 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
612 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
613 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
614 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
615 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
616 *** rcirc-activity-hooks -> rcirc-activity-functions
617 *** rcirc-print-hooks -> rcirc-print-functions
618 *** dbus-event-error-hooks -> dbus-event-error-functions
619 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
620 *** checkdoc-style-hooks -> checkdoc-style-functions
621 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
622 *** archive-extract-hooks -> archive-extract-hook
623 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
624 *** hfy-post-html-hooks -> hfy-post-html-hook
625 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
626 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
627 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
628 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
633 In most cases, assoc+member+push+delq work just as well.
634 And in any case it's just a terrible package: ugly semantics, terrible
635 inefficiency, and not namespace-clean.
644 * Incompatible Lisp Changes in Emacs 24.3
646 ** Docstrings starting with `*' no longer indicate user options.
647 Only variables defined using `defcustom' are considered user options.
648 The function `user-variable-p' is now an obsolete alias for
651 ** The return values of `defalias', `defun' and `defmacro' have changed,
652 and are now undefined. For backwards compatibility, `defun' and
653 `defmacro' currently return the name of the newly defined
654 function/macro, but this should not be relied upon.
656 ** `random' by default now returns a different random sequence in
657 every Emacs run. Use `(random S)', where S is a string, to set the
658 random seed to a value based on S, in order to get a repeatable
659 sequence in later calls.
661 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
662 that substring is inserted literally even if the LITERAL arg is
663 non-nil, instead of causing an error to be signaled.
665 ** `select-window' now always makes the window's buffer current.
666 It does so even if the window was selected before.
668 ** The function `x-select-font' can return a font spec, instead of a
669 font name as a string. Whether it returns a font spec or a font name
670 depends on the graphical library.
672 ** `face-spec-set' no longer sets frame-specific attributes when the
673 third argument is a frame (that usage was obsolete since Emacs 22.2).
675 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
677 ** The CL package's `get-setf-method' function no longer exists.
678 Generalized variables are now part of core Emacs Lisp, and implemented
679 differently to the way cl.el used to do it. It is not possible to
680 define a compatible replacement for `get-setf-method'. See the file
681 gv.el for internal details of the new implementation.
683 ** The arguments of `dbus-register-signal' are no longer just strings,
684 but keywords or keyword-string pairs. The old argument list will
685 still be supported for Emacs 24.x.
687 ** Miscellaneous name changes
688 Some Lisp symbols have been renamed to correct their spelling,
689 or to be more consistent with standard Emacs terminology.
691 *** Renamed functions
692 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
693 **** inactivate-input-method -> deactivate-input-method
694 **** quail-inactivate -> quail-deactivate
695 **** robin-inactivate -> robin-deactivate
696 **** viper-inactivate-input-method -> viper-deactivate-input-method
697 **** viper-inactivate-input-method-action ->
698 viper-deactivate-input-method-action
699 **** ucs-input-inactivate -> ucs-input-deactivate
702 The old hooks are still supported for backward compatibility, but they
703 are deprecated and will be removed eventually.
704 **** input-method-inactivate-hook -> input-method-deactivate-hook
705 **** robin-inactivate-hook -> robin-deactivate-hook
706 **** quail-inactivate-hook -> quail-deactivate-hook
708 *** Renamed variables
709 **** follow-deactive-menu -> follow-inactive-menu
710 **** inactivate-current-input-method-function ->
711 deactivate-current-input-method-function
713 ** Some obsolete functions, variables, and faces have been removed:
714 *** `last-input-char', `last-command-char', `unread-command-char'
715 *** `facemenu-unlisted-faces'
716 *** `rmail-decode-mime-charset'
717 *** `iswitchb-read-buffer'
718 *** `sc-version', `sc-submit-bug-report'
719 *** `set-char-table-default'
720 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
721 *** `compile-internal'
723 *** `mode-line-inverse-video'
724 *** `follow-mode-off-hook'
725 *** `cvs-commit-buffer-require-final-newline'
726 (use `log-edit-require-final-newline' instead)
727 *** `cvs-changelog-full-paragraphs'
728 (use `log-edit-changelog-full-paragraphs' instead)
729 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
730 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
731 *** `vc-master-templates' (use `vc-handled-backends' instead)
732 *** `vc-checkout-carefully'
735 * Lisp Changes in Emacs 24.3
737 ** CL-style generalized variables are now in core Elisp.
738 `setf' is autoloaded; `push' and `pop' accept generalized variables.
739 You can define your own generalized variables using `gv-define-simple-setter',
740 `gv-define-setter', etc.
742 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
743 This can significantly speed up execution of non-byte-compiled code,
744 but can also bump into previously unnoticed cyclic dependencies.
745 These are generally harmless: they will simply cause the macro calls
746 to be left for later expansion (as before), but will result in a
747 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
748 You may wish to restructure your code so this does not happen.
750 ** New sampling-based Elisp profiler.
751 Try M-x profiler-start, do some work, and then call M-x profiler-report.
752 When finished, use M-x profiler-stop. The sampling rate can be based on
753 CPU time or memory allocations.
755 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
756 The interpretation of the DECLS is determined by `defun-declarations-alist'.
758 ** New macros `setq-local' and `defvar-local'.
760 ** Face underlining can now use a wave.
762 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
763 of `read-regexp' accepts a string ending with a colon and space, and its
764 second argument DEFAULTS can be a list of strings accessible via `M-n'
765 in the minibuffer ahead of other hard-coded useful regexp-related values.
766 More commands use `read-regexp' now to read their regexp arguments.
770 *** New function `completion-table-with-quoting' to handle completion
771 in the presence of quoting, such as file completion in shell buffers.
773 *** New function `completion-table-subvert' to use an existing completion
774 table, but with a different prefix.
778 *** New error type and new function `user-error'.
779 These do not trigger the debugger.
781 *** New option `debugger-bury-or-kill', saying what to do with the
782 debugger buffer when exiting debug.
784 *** Set `debug-on-message' to enter the debugger when a certain
785 message is displayed in the echo area. This can be useful when trying
786 to work out which code is doing something.
788 *** New var `inhibit-debugger', automatically set to prevent accidental
789 recursive invocations.
793 *** New command `fit-frame-to-buffer' adjusts the frame height to
796 *** The command `fit-window-to-buffer' can adjust the frame height
797 if the new option `fit-frame-to-buffer' is non-nil.
799 *** New macro `with-temp-buffer-window', similar to
800 `with-output-to-temp-buffer'.
802 *** `temp-buffer-resize-mode' no longer resizes windows that have been
805 *** New option `switch-to-buffer-preserve-window-point' to restore a
806 window's point when switching buffers.
808 *** New display action alist entries `window-height' and `window-width'
809 specify the size of new windows created by `display-buffer'.
811 *** New display action alist entry `pop-up-frame-parameters', if
812 non-nil, specifies frame parameters to give any newly-created frame.
814 *** New display action alist entry `inhibit-switch-frame', if non-nil,
815 tells display action functions to avoid changing which frame is
818 *** New display action alist entry `previous-window', if non-nil,
819 specifies window to reuse in `display-buffer-in-previous-window'.
821 *** New display action functions `display-buffer-below-selected',
822 and `display-buffer-in-previous-window'.
824 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
825 now accept a third argument to avoid choosing the selected window.
827 *** Additional values recognized for option `window-combination-limit'.
829 *** The following variables are obsolete, as they can be replaced by
830 appropriate entries in the `display-buffer-alist' function introduced
832 **** `dired-shrink-to-fit'
833 **** `display-buffer-reuse-frames'
834 **** `display-buffer-function'
835 **** `special-display-buffer-names'
836 **** `special-display-frame-alist'
837 **** `special-display-function'
838 **** `special-display-regexps'
842 *** `current-time-string' no longer requires that its argument's year
843 must be in the range 1000..9999. It now works with any year supported
844 by the underlying C implementation.
846 *** `current-time' now returns extended-format time stamps
847 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
848 PSEC is typically a multiple of 1000 on current machines. Other
849 functions that use this format, such as `file-attributes' and
850 `format-time-string', have been changed accordingly. Old-format time
851 stamps are still accepted.
853 *** The format of timers in `timer-list' and `timer-idle-list' is now
854 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
855 The PSECS slot is new, and uses picosecond resolution. It can be
856 accessed via the new `timer--psecs' accessor.
858 *** Last-modified time stamps in undo lists now are of the form
859 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
861 ** Floating point functions now always return special values like NaN,
862 instead of signaling errors, if given invalid args; e.g., (log -1.0).
863 Previously, they returned NaNs on some platforms but signaled errors
864 on others. The affected functions are acos, asin, tan, exp, expt,
865 log, log10, sqrt, and mod.
867 ** New fringe bitmap `exclamation-mark'.
869 ** Miscellaneous changes to special forms and macros
871 *** `defun' and `defmacro' are now macros rather than special forms.
873 *** `kbd' is now a function rather than a macro.
877 *** Security was improved when handling persistent objects:
878 **** `eieio-persistent-read' now features optional arguments for specifying the
879 class to load, as well as a flag whether subclasses are allowed; if provided,
880 other classes will be rejected by the reader. For staying compatible with
881 existing code, only a warning will be issued if the class is omitted.
882 **** New specialized reader for pulling in classes and signaling errors without
883 evaluation of suspicious code.
884 **** All slots that contain objects must have a :type. Slots with lists of
885 objects must use a new type predicate for a list of an object type.
887 *** Added filename support to generated symbols to support find-function and
890 ** Miscellaneous new functions
892 *** `set-temporary-overlay-map' sets up a temporary keymap that
893 takes precedence over most other maps for a short while (normally one key).
895 *** `autoloadp' tests if its argument is an autoloaded object.
897 *** `autoload-do-load' performs the autoloading operation.
899 *** `buffer-narrowed-p' tests if the buffer is narrowed.
901 *** `file-name-base' returns a file name sans directory and extension.
903 *** `function-get' fetches a function property, following aliases.
905 *** `posnp' tests if an object is a `posn'.
907 *** `system-users' returns the user names on the system.
909 *** `system-groups' returns the group names on the system.
911 *** `tty-top-frame' returns the topmost frame of a text terminal.
913 ** The following functions and variables are obsolete:
914 *** `automount-dir-prefix' (use `directory-abbrev-alist')
915 *** `buffer-has-markers-at'
916 *** `macro-declaration-function' (use `macro-declarations-alist')
917 *** `window-system-version' (provides no useful information)
918 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
919 *** `query-replace-interactive'
920 *** `font-list-limit' (has had no effect since Emacs < 23)
923 * Changes in Emacs 24.3 on Non-Free Operating Systems
925 ** Cygwin builds can use the native MS Windows user interface.
926 Pass `--with-w32' to configure. The default remains the X11 interface.
928 ** Two new functions are available in Cygwin builds:
929 `cygwin-convert-file-name-from-windows' and
930 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
931 code to access the Cygwin file-name mapping machinery to convert
932 between Cygwin and Windows-native file and directory names.
934 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
935 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
936 `mouse-autoselect-window'.
938 ** On MS Windows Vista and later Emacs now supports symbolic links.
940 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
941 support for libxml2, even if its presence is detected.
943 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
945 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
946 directories to the search path. You must add them yourself if you want them.
949 * Changes in Emacs 24.2
951 ** This is mainly a bug-fix release.
954 * Installation Changes in Emacs 24.1
956 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
957 to configure. Note that other libraries used by Emacs, RSVG and GConf,
958 also depend on Gtk+. You can disable them with --without-rsvg and
961 ** Emacs can be compiled with GnuTLS support.
962 This happens by default if a suitably recent version of the library is
963 found at build time. To prevent this, use the configure option
964 `--without-gnutls'. See below for GnuTLS features.
966 ** Emacs can be compiled with SELinux support.
967 This happens by default if a suitably recent version of the library is
968 found at build time. To prevent this, use the configure option
969 `--without-selinux'. See below for SELinux features.
971 ** Emacs can be compiled with ImageMagick support.
972 This happens by default if a suitably recent version of the library is
973 found at build time. To prevent this, use the configure option
974 `--without-imagemagick'. See below for ImageMagick features.
975 This feature is not available for the Nextstep or MS ports.
977 ** Emacs can be compiled with libxml2 support.
978 This happens by default if a suitably recent version of the library is
979 found at build time. To prevent this, use the configure option
980 `--without-xml2'. See below for libxml2 features.
982 ** By default, the installed Info and man pages are compressed.
983 You can disable this by configuring --without-compress-info.
985 ** New configure option --with-wide-int.
986 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
987 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
990 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
991 These provide no new functionality, they just remove the need to edit
992 lib-src/Makefile by hand in order to use the associated features.
994 ** New configure option --enable-use-lisp-union-type.
995 This is only useful for Emacs developers to debug certain types of bugs.
996 This is not a new feature; only the configure flag is new.
998 ** The standalone programs digest-doc and sorted-doc are removed.
999 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1001 ** The standalone program `fakemail' is removed.
1002 If you need it, feedmail.el provides a superset of the functionality.
1005 * Startup Changes in Emacs 24.1
1007 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1008 command line arguments, and the EMACS_UNIBYTE environment variable, no
1009 longer have any effect. (They were declared obsolete in Emacs 23.)
1011 ** New command line option `--no-site-lisp' removes site-lisp directories
1012 from load-path. -Q now implies this. This option does not affect the
1013 EMACSLOADPATH environment variable (and hence has no effect for
1017 * Changes in Emacs 24.1
1021 *** Many packages now use the `completion-at-point' command,
1022 rather than implementing separate completion commands.
1024 *** `completion-at-point' now handles tags and semantic completion.
1026 *** Completion in a non-minibuffer now tries to detect the end of completion
1027 and pops down the *Completions* buffer accordingly.
1029 *** New option `completion-cycle-threshold' allows completion cycling.
1031 *** New option `completion-category-overrides' for overriding the
1032 default completion style in certain circumstances.
1034 *** New completion style `substring'.
1036 *** Completion of buffer names uses `substring' completion by default.
1038 *** The option `widget-complete-field' has been removed.
1042 *** The first time you try sending mail, Emacs asks for a mail method.
1043 This is implemented by a new default for `send-mail-function', which
1044 is `sendmail-query-once'. This offers to use the smtpmail package, or
1045 to use the old defaults relying on external mail facilities
1046 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1047 `mailclient-send-it' on Windows).
1049 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1050 transfers the report to your desktop's preferred mail client, if there
1051 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1054 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1055 and Mail mode changes
1057 ** Emacs server and client changes
1059 *** New option `server-port' specifies the port for TCP Emacs servers.
1061 *** New emacsclient argument -q/--quiet suppresses some status messages.
1063 *** New emacsclient argument --frame-parameters specifies the frame
1064 parameters of any newly-created graphical frame.
1066 *** If emacsclient shuts down due to Emacs signaling an error,
1067 its exit status is 1.
1069 *** New emacsclient argument --parent-id ID.
1070 This opens a client frame in parent X window ID, via XEmbed, similar
1071 to the --parent-id argument to Emacs.
1073 ** Internationalization changes
1075 *** Emacs now supports display and editing of bidirectional text.
1076 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1077 displayed in the correct visual order as expected by users of those
1078 scripts. The display reordering is a "full bidirectionality" class
1079 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1080 with no RTL text should look exactly the same as before.
1082 **** New buffer-local variable `bidi-display-reordering'.
1083 To disable display reordering in a buffer, change this to nil.
1085 **** New buffer-local variable `bidi-paragraph-direction'.
1086 If nil (the default), Emacs determines the base direction of each
1087 paragraph from its text, as specified by the UBA. Setting the value
1088 to `right-to-left' or `left-to-right' forces a base direction on each
1091 Paragraphs with right-to-left base direction are displayed starting at
1092 the right window edge.
1094 *** Enhanced support for characters with no glyphs in available fonts,
1095 or, on text terminals, characters that cannot be encoded by the
1096 terminal coding system. The new option `glyphless-char-display-control'
1097 specifies how to display them: as a hexadecimal code in a box, a thin
1098 1-pixel space, an empty box, etc.
1100 *** New input methods for Farsi and Bulgarian
1101 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1103 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1104 (U+2010 and U+2011).
1106 *** New Hebrew translation of the Emacs Tutorial.
1107 Type `C-u C-h t' to choose it in case your language setup doesn't
1108 automatically select it.
1110 ** An Emacs Lisp package manager is now included.
1111 This is a convenient way to download and install additional packages,
1112 from a package repository at http://elpa.gnu.org.
1114 *** M-x list-packages shows a list of packages, which can be
1115 selected for installation.
1117 *** New command `describe-package', bound to `C-h P'.
1119 *** By default, all installed packages are loaded automatically when
1120 Emacs starts up. To disable this, set `package-enable-at-startup' to
1121 nil. To specify the packages to load, customize `package-load-list'.
1123 ** Custom theme changes
1125 *** New command `M-x customize-themes', which provides a convenient
1126 interface for enabling and disabling Custom themes.
1128 *** New option `custom-theme-load-path' is the load path for themes.
1129 Emacs no longer looks for Custom themes in `load-path'. The default
1130 value of `custom-theme-load-path' says to look for themes in
1131 `custom-theme-directory', followed by a subdirectory of
1132 `data-directory' named "themes/", which contains a small selection of
1133 built-in Custom themes.
1135 *** New option `custom-safe-themes' records known-safe theme files.
1136 If a theme is not in this list, Emacs queries before loading it, and
1137 offers to save the theme to `custom-safe-themes' automatically. By
1138 default, all themes included in Emacs are treated as safe.
1140 ** Improved GTK integration
1142 *** GTK scroll-bars are now placed on the right by default.
1143 The function `set-scroll-bar-mode' can change this.
1145 *** GTK tool bars can have just text, just images or images and text.
1146 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1147 the default is taken from desktop settings.
1149 *** GTK tool bars can be placed on any edge of the frame.
1150 The frame-parameter tool-bar-position controls this. It takes the
1151 values top, left, right or bottom. The Options => Show/Hide menu has
1154 *** The default colors for selected text (the `region' face) are taken
1155 from the GTK theme when Emacs is built with GTK.
1157 *** Emacs uses GTK tooltips by default if built with GTK.
1158 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1160 ** Graphical interface changes
1162 *** On graphical displays, the mode-line no longer ends in dashes.
1163 Also, the first dash (which does not indicate anything) is just
1164 displayed as a space.
1166 *** `menu-bar-select-buffer-function' lets you choose another operation
1167 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1169 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1170 built with Xft. These fonts can be set via X resources, for example:
1171 Emacs.pane.menubar.font: Courier-12
1175 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1176 or if it receives a SIGINT signal in batch mode.
1178 *** `kill-emacs-hook' is now also run in batch mode.
1179 Third-party code which adds to `kill-emacs-hook' should check if they
1180 do the right thing in batch mode.
1182 ** Scrolling changes
1184 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1185 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1186 of buffer at first key-press (instead they move to top/bottom of buffer)
1187 when `scroll-error-top-bottom' is non-nil.
1189 *** New option `scroll-error-top-bottom' (see above).
1191 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1192 scroll a line instead of full screen.
1194 *** New property `scroll-command' should be set on a command's symbol to
1195 define it as a scroll command affected by `scroll-preserve-screen-position'.
1197 *** If you customize `scroll-conservatively' to a value greater than 100,
1198 Emacs will never recenter point in the window when it scrolls due to
1199 cursor motion commands or commands that move point (e.f., `M-g M-g').
1200 Previously, you needed to use `most-positive-fixnum' as the value of
1201 `scroll-conservatively' to achieve the same effect.
1203 *** "Aggressive" scrolling now honors the scroll margins.
1204 If you customize `scroll-up-aggressively' or
1205 `scroll-down-aggressively' and move point off the window, Emacs now
1206 scrolls the window so as to avoid positioning point inside the scroll
1209 ** Basic SELinux support has been added.
1210 This requires Emacs to be linked with libselinux at build time.
1212 *** Emacs preserves the SELinux file context when backing up.
1213 Also, the function `copy-file' has an extra optional argument for
1214 preserving SELinux context, and the return value of `backup-buffer'
1215 now includes the SELinux context.
1217 *** New functions `file-selinux-context' and `set-file-selinux-context'
1218 get and set the SELinux context of a file.
1222 *** `delete-by-moving-to-trash' now only affects commands that specify
1223 trashing. This avoids inadvertently trashing temporary files.
1225 *** Calling `delete-file' or `delete-directory' with a prefix argument
1226 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1228 ** File- and directory-local variable changes
1230 *** You can stop directory local vars from applying to subdirectories.
1231 Add an element (subdirs . nil) to the alist portion of any variables
1232 settings to indicate that the section should not apply to
1235 *** Directory local variables can apply to some file-less buffers.
1236 Affected modes include dired, vc-dir, and log-edit. For example,
1237 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1238 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1239 `hack-dir-local-variables-non-file-buffer' to support this.
1241 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1242 Instead, use "eval: (minor-mode 1)".
1244 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1245 to `inhibit-local-variables-regexps'. As the name suggests, it now
1246 applies to ALL file local variables, not just -*- lines. The
1247 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1252 *** The `quit-window' command now restores the last buffer displayed
1253 in the quitted window.
1255 *** Resizing an Emacs frame now preserves proportional window sizes,
1256 modulo restrictions like window minimum sizes and fixed-size windows.
1258 *** The behavior of `display-buffer' is now customizable in detail.
1260 **** New option `display-buffer-base-action' specifies a list of
1261 user-determined display "actions" (functions and optional arguments
1262 for choosing the displaying window).
1264 This takes precedence over the default display action, which is
1265 specified by `display-buffer-fallback-action'.
1267 **** New option `display-buffer-alist' maps buffer name regexps to
1268 display actions, taking precedence over `display-buffer-base-action'.
1270 *** New option `window-combination-limit'.
1271 The new option `window-combination-limit' allows to return the space
1272 obtained for resizing or creating a window more reliably to the window
1273 from which such space was obtained.
1275 *** New option `window-combination-resize'.
1276 The new option `window-combination-resize' allows to split a window that
1277 otherwise cannot be split because it's too small by stealing space from
1278 other windows in the same combination. Subsequent resizing or deletion
1279 of the window will resize all windows in the same combination as well.
1281 *** New option `frame-auto-hide-function' lets you choose between
1282 iconifying or deleting a frame when burying a buffer in a dedicated
1283 frame, or quitting a window showing a buffer in a frame of its own.
1285 *** New commands `maximize-window' and `minimize-window'.
1286 These maximize and minimize the size of a window within its frame.
1288 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1289 These functions allow to navigate through the live buffers that have
1290 been shown in a specific window.
1292 ** Minibuffer changes
1294 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
1295 This is handy for minibuffer-only frames, and is also used for the feature
1296 where mouse-1 pops up *Messages*"', which can now easily be changed.
1298 *** Minibuffers set `truncate-lines' to nil.
1299 If you want to change the value to something else, you could use
1300 for example `minibuffer-setup-hook'.
1302 ** `auto-mode-case-fold' is now enabled by default.
1304 ** `backup-by-copying-when-mismatch' now defaults to t.
1306 ** New basic faces `error', `warning', `success'.
1307 These are used to highlight text indicating failure, caution or
1308 successful operation.
1310 ** New option `list-colors-sort' defines the color sort order
1311 for `list-colors-display'.
1313 ** The variable `focus-follows-mouse' now always defaults to nil.
1316 * Editing Changes in Emacs 24.1
1320 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1321 `isearch-yank-line'.
1323 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1324 `isearch-yank-kill'.
1326 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1328 ** New commands `count-words-region' and `count-words'.
1330 *** M-= is bound to `count-words-region', not `count-lines-region'.
1331 The `count-words-region' command, when called interactively, reports
1332 the number of lines, words, and characters in the region. It is a
1333 superset of the old `count-lines-region', which is now an obsolete
1336 ** The command `just-one-space' (M-SPC), if given a negative argument,
1337 also deletes newlines around point.
1341 *** New option `delete-active-region'.
1342 If non-nil, [delete] and DEL delete the region if it is active and no
1343 prefix argument is given. If set to `kill', those commands kill
1346 *** New command `delete-forward-char', bound to [delete].
1347 This is meant for interactive use, and obeys `delete-active-region'.
1348 The command `delete-char' does not obey `delete-active-region'.
1350 *** `delete-backward-char' is now a Lisp function.
1351 Apart from obeying `delete-active-region', its behavior is unchanged.
1352 However, the byte compiler now warns if it is called from Lisp; Lisp
1353 callers should use delete-char with a negative argument instead.
1355 *** The option `mouse-region-delete-keys' has been deleted.
1357 ** Selection changes.
1359 The default handling of clipboard and primary selections has been
1360 changed to conform with modern X applications. In short, most
1361 commands for killing and yanking text now use the clipboard, while
1362 mouse commands use the primary selection.
1364 In the following, we provide a list of these changes, followed by a
1365 list of steps to get the old behavior back if you prefer that.
1367 *** `select-active-regions' now defaults to t.
1368 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
1369 the kill ring. The selected text is put in the primary selection, if
1370 the system possesses a separate primary selection facility (e.g. X).
1372 **** `select-active-regions' also accepts a new value, `only'.
1373 This means to only set the primary selection for temporarily active
1374 regions (usually made by mouse-dragging or shift-selection);
1375 "ordinary" active regions, such as those made with C-SPC followed by
1376 point motion, do not alter the primary selection.
1378 **** `mouse-drag-copy-region' now defaults to nil.
1380 *** mouse-2 is now bound to `mouse-yank-primary'.
1381 This pastes from the primary selection, ignoring the kill-ring.
1382 Previously, mouse-2 was bound to `mouse-yank-at-click'.
1384 *** `x-select-enable-clipboard' now defaults to t on all platforms.
1386 *** `x-select-enable-primary' now defaults to nil.
1387 Thus, commands that kill text or copy it to the kill-ring (such as
1388 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1390 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
1391 exactly equivalent to M-w, C-w, and C-y respectively.
1393 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
1394 non-nil by default, as Windows does not support the primary selection
1395 between applications.
1397 *** To return to the previous behavior, do the following:
1399 **** Change `select-active-regions' to nil.
1400 **** Change `mouse-drag-copy-region' to t.
1401 **** Change `x-select-enable-primary' to t (on X only).
1402 **** Change `x-select-enable-clipboard' to nil.
1403 **** Bind `mouse-yank-at-click' to mouse-2.
1405 *** Support for X cut buffers has been removed.
1407 *** X clipboard managers are now supported.
1408 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
1410 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1411 in the current rectangle. With a prefix argument, this prompts for a
1412 number to count from and for a format string.
1414 ** `redisplay-dont-pause' now defaults to t.
1415 This makes Emacs feel more responsive to editing commands that arrive
1416 at high rate, e.g. if you lean on some key, because stopping redisplay
1417 in the middle (when this variable is nil) forces more expensive
1418 updates later on, and Emacs appears to be unable to keep up.
1420 ** The behavior of <TAB> for active regions in Text mode has changed.
1421 In Text and related modes, typing <TAB> (`indent-for-tab-command')
1422 when the region is active causes Emacs to indent all the lines in the
1423 region, aligning them with the line previous to the first line in the
1424 region (or with the left margin if there is no previous line).
1426 ** When `occur' is called with a prefix argument, matching strings are
1427 collected into the `*Occur*' buffer without line numbers. If there
1428 are parenthesized subexpressions in the specified regexp, `occur'
1429 reads replacement text that may contain \\& and \\N whose convention
1430 follows `replace-match'.
1433 * Changes in Specialized Modes and Packages in Emacs 24.1
1435 ** Archive Mode has basic support for browsing and updating 7z archives.
1439 *** BibTeX mode now supports biblatex.
1440 Use the variable `bibtex-dialect' to select different BibTeX dialects.
1441 `bibtex-entry-field-alist' is now an obsolete alias for
1442 `bibtex-BibTeX-entry-alist'.
1444 *** New command `bibtex-search-entries', bound to C-c C-a.
1446 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
1448 *** New variable `bibtex-search-entry-globally'.
1452 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
1454 *** The default browser used by the package is now the "xdg-open" program,
1455 on platforms that support it. This calls your desktop's preferred browser.
1457 ** Calendar, Diary, and Appt
1459 *** Diary entries can contain non-printing "comments".
1460 See the variable `diary-comment-start'.
1462 *** Appointments can specify their individual warning times.
1463 See the variable `appt-warning-time-regexp'.
1465 *** The function specified by `appt-disp-window-function' may be passed
1466 lists of arguments if multiple appointments are due at similar times.
1467 If you are using a custom function for this, you should update it.
1469 *** New function `diary-hebrew-birthday'.
1471 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1472 may no longer be nil, but must all be strings.
1474 *** The obsolete (since Emacs 22.1) method of enabling the appt
1475 package by adding `appt-make-list' to `diary-hook' has been removed.
1476 Use `appt-activate' instead.
1478 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
1479 appt-issue-message (use the function appt-activate)
1480 appt-visible/appt-msg-window (use the variable appt-display-format)
1482 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1483 view-diary-entries, list-diary-entries, show-all-diary-entries
1487 *** New feature to "guess" the style in an existing buffer.
1488 The main entry point is M-x c-guess.
1490 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1492 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
1493 Thus C-M-a will, by default, go to the beginning of the immediate function,
1496 *** "Macros with semicolons" can be registered for correct indentation.
1497 Where such a macro ends a line (no semicolon) the next statement is no longer
1498 parsed as a statement continuation.
1500 ** Comint and modes derived from it use the standard completion code.
1504 *** Compilation mode can be used without Font Lock mode.
1505 `compilation-parse-errors-function' is now obsolete.
1507 *** New variable `compilation-filter-start', which is bound while
1508 `compilation-filter-hook' runs. It records the start position of the
1509 text inserted by `compilation-filter'.
1511 *** `compilation-error-screen-columns' and `compilation-first-column'
1512 are obeyed in the editing buffer. So programming language modes can
1513 set them, whereas previously only the value in the *Compilation*
1518 *** Customize buffers now contain a search field.
1519 The search is performed using `customize-apropos'.
1520 To turn off the search field, set `custom-search-field' to nil.
1522 *** Options in customize group buffers start out hidden if not customized.
1523 Use the arrow to the left of the option name to toggle visibility.
1525 *** custom-buffer-sort-alphabetically now defaults to t.
1527 *** The color widget now has a "Choose" button, which allows you to
1528 choose a color via `list-colors-display'.
1532 *** It is now possible to access buses other than the default system
1535 *** The `dbus-register-method' and `dbus-register-property' functions
1536 optionally do not register names.
1538 *** The new function `dbus-register-service' registers a known service
1539 name on a D-Bus without also registering a property or a method.
1543 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1544 if called with a prefix argument, read a file name from the minibuffer
1545 instead of using the current buffer.
1547 *** The "dired local variables" feature of Dired-x is obsolete.
1548 The standard directory local variables feature replaces it.
1552 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1553 controlling attempts to autojoin a channel.
1555 *** New variable `erc-coding-system-precedence': If we use `undecided'
1556 as the server coding system, this variable will then be consulted.
1557 The default is to decode strings that can be decoded as utf-8 as
1558 utf-8, and do the normal `undecided' decoding for the rest.
1562 *** The default value of `eshell-directory-name' has changed
1563 to be an "eshell" directory in `user-emacs-directory'.
1564 The old "~/.eshell/" directory is still used if it exists, though.
1568 *** The M-x gdb command now uses the GDB Machine Interface protocol.
1569 It now supports multithread non-stop debugging and simultaneous
1570 debugging of several threads.
1574 *** RET (`image-toggle-animation') toggles animation, if applicable.
1575 Animation plays once, unless the option `image-animate-loop' is non-nil.
1579 *** New command M-x info-display-manual displays a named Info manual.
1580 If that manual is already visited in some Info buffer, it displays
1581 that buffer. (This is handy if you have many manuals in many *info*
1582 buffers, and don't remember the name of the buffer visiting the manual
1583 you want to consult.) Otherwise, it loads and displays the manual.
1585 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
1586 This is for compatibility with the stand-alone Info reader program,
1587 and also because `Info-edit' is a rarely used command that is disabled
1590 ** Mail mode changes (not Message mode)
1592 *** New command M-x mail-add-attachment for adding MIME attachments
1594 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
1595 (Its name is misleading, since it has nothing to do with MIME
1596 attachments.) The old name is now an obsolete alias to the new name.
1598 ** MH-E has been updated to MH-E version 8.3.1.
1599 See MH-E-NEWS for details.
1601 ** Modula-2 mode provides auto-indentation.
1603 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
1605 ** nXML mode no longer binds C-RET to `nxml-complete'.
1606 Completion is now performed via `completion-at-point', bound to C-M-i
1607 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
1608 default), this performs tag completion.
1610 ** Org mode has been updated to version 7.8.09.
1611 See ORG-NEWS for details.
1613 ** Prolog mode has been completely revamped, with lots of additional
1614 functionality such as more intelligent indentation, electricity,
1615 support for more variants, including Mercury, and a lot more.
1619 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
1620 in the Rmail incoming message.
1622 *** The variable `rmail-message-filter' no longer has any effect.
1623 This change was made in Emacs 23.1 but was not advertised at the time.
1624 Try using `rmail-show-message-hook' instead.
1628 *** M-x shell prompts for the shell path name if the default directory
1629 is a remote file name and neither the environment variable $ESHELL nor
1630 the variable `explicit-shell-file-name' is set.
1632 *** TAB is now bound to the standard `completion-at-point' command,
1633 which now implements the pcomplete rules for shell command completion.
1637 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
1638 if the mail server supports them. This uses either built-in GnuTLS
1639 support, or the starttls.el library. Customize `smtpmail-stream-type'
1642 *** The variable `smtpmail-auth-credentials' has been removed.
1643 By default, the information is now stored in the file ~/.authinfo.
1644 This was the default value of smtpmail-auth-credentials. If you had
1645 customized smtpmail-auth-credentials to a list of user names and
1646 passwords, those settings are not used. During your first connection
1647 to the smtp server, Emacs will prompt for the user name and password,
1648 and offer to save them to ~/.authinfo. Or you can manually copy the
1649 credentials to ~/.authinfo. For example, if you had
1651 (setq smtpmail-auth-credentials
1652 '(("mail.example.org" 25 "jim" "s!cret")))
1654 then the equivalent line in ~/.authinfo would be
1656 machine mail.example.org port 25 login jim password s!cret
1658 See the auth-source manual for more information, e.g. on encrypting
1659 the credentials file.
1661 *** The variable `smtpmail-starttls-credentials' has been removed.
1662 If you had that set, you need to put
1664 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
1666 in your ~/.authinfo file instead.
1668 *** SMTPmail defaults to using the address in the From: header as the
1669 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
1670 to the address you wish to use instead.
1674 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
1675 and `sql-oracle-scan-on'.
1677 *** New options controlling prompting for login parameters.
1678 Each supported product has a custom variable `sql-*-login-params',
1679 which is a list of the parameters to be prompted for before a
1680 connection is established.
1682 *** The command `sql-product-interactive' now takes a prefix argument,
1683 which causes it to prompt for an SQL product.
1685 *** Product-specific SQL interactive commands now take prefix arguments.
1686 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
1687 given a prefix argument, prompt for a name for the SQL interactive
1688 buffer. This reduces the need for calling `sql-rename-buffer'.
1690 *** SQL interactive modes suppress command continuation prompts, and
1691 replace tabs with spaces. The first change impacts multiple line SQL
1692 statements entered with C-j between each line, statements yanked into
1693 the buffer and statements sent with `sql-send-*' functions. The
1694 second prevents the MySQL and Postgres interpreters from listing
1695 object name completions when sent text via `sql-send-*' functions.
1697 *** New command `sql-connect' starts a predefined SQLi session,
1698 using the login parameters from `sql-connection-alist'.
1700 *** New "Save Connection" menu item in SQLi buffers.
1701 This gathers the login params specified for the SQLi session, if it
1702 was not started by a connection, and saves them as a new connection.
1704 *** New commands for listing database objects and details:
1705 sql-list-all and sql-list-table.
1707 *** An API for manipulating SQL product definitions has been added.
1711 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
1715 *** New inline access method "ksu" (kerberized su).
1717 *** The following access methods are discontinued: "ssh1_old",
1718 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
1720 *** The user option `remote-file-name-inhibit-cache' controls whether
1721 remote file attributes are cached for better performance.
1723 *** The option `ange-ftp-binary-file-name-regexp' has changed its
1724 default value to "".
1726 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
1727 for remote machines which support SELinux.
1729 ** New function `url-queue-retrieve', which behaves like url-retrieve,
1730 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
1731 the degree of parallelism.
1733 ** VC and related modes
1735 *** Support for pulling on distributed version control systems.
1736 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
1737 supported (currently with Bzr, Git, and Mercurial), to update the
1738 current branch and working tree. A prefix argument means to prompt
1739 the user for specifics, e.g. a pull location.
1741 *** `vc-update' is now an alias for `vc-pull'.
1743 *** Support for merging on distributed version control systems.
1744 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
1745 is supported (currently with Bzr, Git, and Mercurial), to merge
1746 changes from another branch into the current one. It prompts for
1747 specifics, e.g. a merge source.
1749 *** New option `vc-revert-show-diff' controls whether `vc-revert'
1750 shows a diff while querying the user. It defaults to t.
1752 *** Log entries in some Log View buffers can be toggled to display a
1753 longer description by typing RET (log-view-toggle-entry-display).
1754 This is currently supported for Bzr, Git, and Mercurial (to support
1755 another backend, define a `log-view-expanded-log-entry-function').
1756 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
1757 use this to display the full log entry for the revision at point.
1759 *** New command `vc-ediff' allows visual comparison of two revisions
1760 of a file similar to `vc-diff', but using ediff backend.
1762 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
1763 this was not advertised at the time.
1765 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
1766 Since Emacs 23, it has done the same thing as `toggle-read-only', but
1767 this was not advertised at the time.
1773 *** erc-hecomplete.el (use erc-pcomplete.el instead)
1775 *** partial-completion-mode (complete.el) is obsolete.
1776 You can get a comparable behavior with:
1777 (setq completion-styles '(partial-completion initials))
1778 (setq completion-pcm-complete-word-inserts-delimiters t)
1780 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
1782 *** pgg is obsolete (use EasyPG instead).
1784 *** sregex.el is obsolete, since rx.el is a strict superset.
1786 *** s-region.el and pc-select.el are obsolete.
1787 They are superseded by shift-select-mode, enabled by default since 23.1.
1789 *** vc-mcvs.el is obsolete (for lack of a maintainer).
1793 *** The Landmark game is now invoked with `landmark', not `lm'.
1794 Its functions and variables have been similarly renamed.
1796 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
1797 (This interfered with cua-mode.)
1799 *** f90.el has some support for Fortran 2008 syntax.
1801 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
1803 *** New command `nato-region' converts text to NATO phonetic alphabet.
1806 * New Modes and Packages in Emacs 24.1
1808 ** Occur Edit mode applies edits made in *Occur* buffers to the
1809 original buffers. It is bound to "e" in Occur mode.
1811 ** New global minor mode electric-pair-mode.
1812 When enabled, typing an open parenthesis automatically inserts the
1813 matching closing one.
1815 ** New global minor mode electric-indent-mode.
1816 When enabled, typing certain characters triggers reindentation.
1817 Major modes wishing to use this can set electric-indent-chars or
1818 electric-indent-functions.
1820 ** New global minor mode electric-layout-mode.
1821 When enabled, typing certain characters automatically inserts newlines.
1822 Major modes wishing to use this can set electric-layout-rules.
1824 ** tabulated-list.el provides a generic major mode for tabulated data,
1825 from which other modes can be derived.
1827 ** pcase.el provides the ML-style pattern matching macro `pcase'.
1829 ** secrets.el is an implementation of the Secret Service API, an
1830 interface to password managers like GNOME Keyring or KDE Wallet. The
1831 Secret Service API requires D-Bus for communication. The command
1832 `secrets-show-secrets' offers a buffer with a visualization of the
1835 ** notifications.el provides an implementation of the Desktop
1836 Notifications API. It requires D-Bus for communication.
1838 ** soap-client.el supports access to SOAP web services from Emacs.
1839 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
1841 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
1843 ** New emacs-lock.el package.
1844 The previous version has been moved to obsolete/old-emacs-lock.el.
1845 Now, there is a proper minor mode `emacs-lock-mode'. Protection
1846 against exiting Emacs and killing the buffer can be set separately.
1847 The mechanism for automatically turning off protection for buffers
1848 with dead inferior processes has been generalized.
1851 * Incompatible Lisp Changes in Emacs 24.1
1853 ** Passing a nil argument to a minor mode function call now ENABLES
1854 the minor mode unconditionally. This is so that you can write e.g.
1856 (add-hook 'text-mode-hook 'foo-mode)
1858 to enable foo-mode in Text mode buffers, removing the need for
1859 `turn-on-foo-mode' style functions. This affects all mode commands
1860 defined by `define-minor-mode'. If called interactively, the mode
1861 command still toggles the minor mode.
1863 ** The return value of `backup-buffer' has changed.
1864 It is now a list of three elements, where the second element is a list
1865 describing the original file's SELinux context. If Emacs or the
1866 system lacks SELinux support, the context list is (nil nil nil nil).
1867 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
1869 ** `char-direction-table' and the `char-direction' function were deleted.
1870 They were buggy and inferior to the new support of bidirectional
1871 editing introduced in Emacs 24. If you need the bidirectional
1872 properties of a character, use `get-char-code-property' with the last
1873 argument `bidi-class'.
1875 ** `copy-directory' now copies the source directory as a subdirectory
1876 of the target directory, if the latter is an existing directory. The
1877 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1878 the contents directly into a pre-existing target directory.
1880 ** For mouse click input events in the text area, the Y pixel
1881 coordinate in the POSITION list now counts from the top of the text
1882 area, excluding any header line. Previously, it counted from the top
1885 ** Support for "old-style" backquotes, obsolete for 10+ years, has
1886 been further reduced. Now a backquote not followed by a space is
1887 always treated as a "new-style" backquote. Please remove all
1888 "old-style" backquotes from your code. If your code uses backquotes
1889 as documented in the Elisp manual, and compiles without warning, then
1890 you have nothing to do in this regard. Code not following the
1891 appropriate conventions may fail to compile.
1893 The most common cause of trouble seems to be an old-style backquote
1894 followed by a newline. Another cause of trouble is vector notation
1895 for key sequence notation: instead of [(control ,)] and [(control ')],
1896 you should write [(control ?,)] and [(control ?')], which will work in
1899 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
1900 was not advertised at the time. The function `custom-initialize-delay'
1901 replaced all known uses.
1903 ** `view-buffer' now treats special mode-class in the same way that
1904 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
1905 major mode is special).
1907 ** Menu and tool bar changes
1909 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
1910 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1911 With these alist entries omitted, `make-frame' checks the value of the
1912 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1913 a menu-bar or tool-bar, respectively. If the alist entries are added,
1914 they override the value of `menu-bar-mode'/`tool-bar-mode'.
1916 *** The menu bar bindings's caches are not used any more.
1917 Use (where-is-internal <def> nil t) instead.
1919 ** Regions created by mouse dragging are now normal active regions,
1920 similar to those created by shift-selection (see Selection changes
1921 above). In previous Emacs versions, these regions were delineated by
1922 `mouse-drag-overlay'; that variable has been removed.
1924 ** The fourth argument of `filter-buffer-substring' has been removed.
1925 If you want to remove text properties from the final result, simply
1926 pass the result through substring-no-properties.
1928 ** cl.el no longer provides `cl-19'.
1930 ** The following obsolete functions and aliases have been removed
1931 (the appropriate new function is given in parentheses; "not needed"
1932 means you can just remove all calls to the function in question):
1934 *** `comint-kill-output' (`comint-delete-output')
1935 *** `decompose-composite-char' (`char-to-string')
1936 *** `outline-visible' (`outline-invisible-p')
1937 *** `internal-find-face' (`facep')
1938 *** `internal-get-face' (`facep and check-face')
1939 *** `frame-update-faces' (not needed)
1940 *** `frame-update-face-colors' (`frame-set-background-mode')
1941 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
1942 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
1943 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
1944 *** `x-make-font-bold-italic' (`make-face-bold-italic')
1945 *** `x-make-font-unbold' (`make-face-unbold')
1946 *** `x-make-font-unitalic' (`make-face-unitalic')
1947 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
1948 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
1949 *** `iswitchb-default-keybindings' (`iswitchb-mode')
1950 *** `char-bytes' (== 1)
1951 *** `isearch-return-char' (`isearch-printing-char')
1952 *** `make-local-hook' (not needed)
1953 *** `set-screen-height' (`set-frame-height')
1954 *** `set-screen-width' (`set-frame-width')
1956 ** The following obsolete variables and varaliases have been removed
1957 (the appropriate new variable is given in parentheses):
1959 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
1960 *** `vc-header-alist' (`vc-BACKEND-header')
1961 *** `directory-sep-char' (== ?/)
1962 *** `font-lock-defaults-alist' (`font-lock-defaults')
1963 *** `e' (`float-e').
1965 ** The following obsolete files were removed:
1966 sc.el, x-menu.el, rnews.el, rnewspost.el
1968 ** The format of the finder-inf.el file has changed, since the Finder
1969 mechanism is now based on the package system. The variable
1970 `finder-package-info' is replaced by `package--builtins' and
1971 `finder-keywords-hash'.
1973 ** When generating autoloads, `update-directory-autoloads' no longer
1974 assumes every inspected file is in your `load-path'. It instead
1975 generates relative names according to the current `load-path'.
1978 * Lisp Changes in Emacs 24.1
1980 ** Code can now use lexical scoping by default instead of dynamic scoping.
1981 The `lexical-binding' variable enables lexical scoping for local
1982 variables. It is typically set via a file-local variable in the first
1983 line of the file, in which case it applies to all the code in that
1986 *** `eval' takes a new optional argument `lexical' to choose the new lexical
1987 binding instead of the old dynamic binding mode.
1989 *** Lexically scoped interpreted functions are represented with a new form
1990 of function value which looks like (closure ENV ARGS &rest BODY).
1992 *** New macro `letrec' to define recursive local functions.
1994 *** `defvar' and `defconst' now mark the variable as special (dynamic).
1995 So do `defcustom' and other forms that call `defvar' as a subroutine.
1997 *** New function `special-variable-p' to check whether a variable is
1998 declared as dynamically bound.
2000 *** The form ((lambda ...) ...) is deprecated.
2002 ** An Emacs Lisp testing tool is now included.
2003 Emacs Lisp developers can use this tool to write automated tests for
2004 their code. See the ERT info manual for details.
2006 ** Changes for bidirectional display and editing
2008 *** New function `current-bidi-paragraph-direction'.
2009 This returns the base direction of the paragraph at point.
2011 *** New function `bidi-string-mark-left-to-right'.
2012 Given a string containing characters from right-to-left scripts, this
2013 function returns another string which can be safely inserted into a
2014 buffer, such that any following text will be always displayed to the
2015 right of that string. (This works by appending an invisible Unicode
2016 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2018 This is useful when the buffer has overall left-to-right paragraph
2019 direction and you need to insert a string whose contents are not known
2020 in advance, without disrupting the layout of the line.
2024 *** Window tree functions are accessible in Elisp.
2025 Functions are provided to return the parent, siblings or child windows
2026 of any window including internal windows (windows not associated with a
2027 buffer) in the window tree.
2029 **** New function `window-valid-p' gives non-nil for live and internal
2032 **** Window manipulation can deal with internal windows.
2033 Many window handling functions like `split-window', `delete-window', or
2034 `delete-other-windows' as well as the window resizing functions can now
2035 act on any window including internal ones.
2037 *** window-total-height/-width vs window-body-height/-width.
2038 The function `window-height' has been renamed to `window-total-height'
2039 and `window-width' has been renamed to `window-body-width'. The old
2040 names are provided as aliases. Two new functions `window-total-width'
2041 and `window-body-height' are provided.
2043 *** Window parameters specific to window handling functions.
2044 For each window you can specify a parameter to override the default
2045 behavior of a number of functions like `split-window', `delete-window'
2046 and `delete-other-windows'. The variable `ignore-window-parameters'
2047 allows to ignore processing such parameters.
2049 *** New semantics of third argument of `split-window'.
2050 The third argument of `split-window' has been renamed to SIDE and can be
2051 set to any of the values 'below, 'right, 'above, or 'left to make the
2052 new window appear on the corresponding side of the window that shall be
2053 split. Any other value of SIDE will cause `split-window' to split the
2054 window into two side-by-side windows as before.
2056 *** Window resizing functions.
2057 A new standard function for resizing windows called `window-resize' has
2058 been introduced. This and all other functions for resizing windows no
2059 longer delete any windows when they become too small.
2061 *** Deleting the selected window now selects the most recently selected
2062 live window on that frame instead.
2064 *** `adjust-window-trailing-edge' adjustments.
2065 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2066 is able to resize other windows if a window adjacent to the trailing
2067 edge cannot be shrunk any more. This makes its behavior more similar to
2068 that of Emacs 21 without compromising, however, its inability to delete
2069 windows which was introduced in Emacs 22.
2071 *** Window-local buffer lists.
2072 Windows now have local buffer lists. This means that removing a buffer
2073 from display in a window will preferably show the buffer previously
2074 shown in that window with its previous window-start and window-point
2075 positions. This also means that the same buffer may be automatically
2076 shown twice even if it already appears in another window.
2078 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2079 which if non-nil requires the buffer to be displayed in the currently
2080 selected window, signaling an error otherwise. If nil, another window
2081 can be used, e.g. if the selected one is strongly dedicated.
2083 *** `split-window-vertically' and `split-window-horizontally' renamed
2084 to `split-window-below' and `split-window-right' respectively.
2085 The old names are kept as aliases.
2089 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2090 named ACTION, and takes a display action of the same form as
2091 `display-buffer-base-action' (see Changes, above). A non-nil,
2092 non-list value is treated specially, as the old meaning.
2094 **** New variable `display-buffer-overriding-action'.
2096 **** The procedure of `display-buffer' etc. to choose a window is
2097 determined by combining `display-buffer-overriding-action',
2098 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2099 and `display-buffer-fallback-action'. The second and fourth of these
2100 are user-customizable variables.
2102 See the docstring of `display-buffer' for details.
2104 *** New functions `window-state-get' and `window-state-put'.
2105 These functions allow to save and restore the state of an arbitrary
2106 frame or window as an Elisp object.
2110 *** New variable `completion-extra-properties' used to specify extra
2111 properties of the current completion:
2112 - :annotate-function, same as the old completion-annotate-function.
2113 - :exit-function, function to call after completion took place.
2115 *** Functions on `completion-at-point-functions' can return any of the
2116 properties valid for `completion-extra-properties'.
2118 *** `completion-annotate-function' is obsolete.
2120 *** New `metadata' method for completion tables. The metadata thus returned
2121 can specify various details of the data returned by `all-completions':
2122 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2123 used to select a style in completion-category-overrides.
2124 - `annotation-function' to add annotations in *Completions*.
2125 - `display-sort-function' to specify how to sort entries in *Completions*.
2126 - `cycle-sort-function' to specify how to sort entries when cycling.
2128 *** `minibuffer-local-filename-must-match-map' is not used any more.
2129 Instead, the bindings in `minibuffer-local-filename-completion-map'
2130 are combined with `minibuffer-local-must-match-map'.
2132 *** New variable `completing-read-function' allows overriding the
2133 behavior of `completing-read'.
2135 ** `glyphless-char-display' can now distinguish between graphical and
2136 text terminal display, via a char-table entry that is a cons cell.
2138 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2139 Instead, the offending function is removed.
2143 *** New function `run-hook-wrapped' for running an abnormal hook by
2144 passing the hook functions as arguments to a "wrapping" function.
2145 Like `run-hook-with-args-until-success', it stops at the first
2146 non-nil return value.
2148 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2149 set of "wrapping" filters, similar to around advice.
2150 (A version of this macro was actually added in Emacs 23.2 but was not
2151 advertised at the time.)
2155 *** New macro `condition-case-unless-debug' (this was actually added in
2156 Emacs 23.1 as condition-case-no-debug, but not advertised)
2158 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2160 *** Variable `stack-trace-on-error' removed.
2162 *** The debugger can now "continue" from an error, which means it will
2163 jump to the error handler as if the debugger had not been invoked
2164 instead of jumping all the way to the top-level.
2166 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2167 This can be useful when `inhibit-quit' is set.
2169 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2170 named Emacs server instances.
2172 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2173 to redirect STDOUT to a file.
2175 ** The function `format-time-string' now supports the %N directive,
2176 for higher-resolution time stamps.
2178 ** New input reading functions
2180 *** New function `read-char-choice' reads a restricted set of
2181 characters, discarding any inputs not inside the set.
2183 *** The command `read-color' now requires a match for a color name
2184 or RGB triplet, instead of signaling an error if the user provides
2187 **** `facemenu-read-color' is now an alias for `read-color'.
2189 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2190 The variable is now used to load all kind of supported dynamic libraries,
2191 not just image libraries. The previous name is still available as an
2194 ** Syntax parsing changes
2196 *** New variable `syntax-propertize-function'.
2197 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2198 This allows syntax-table properties to be set independently from font-lock:
2199 just call syntax-propertize to make sure the text is propertized.
2200 Together with this new variable come a new hook
2201 syntax-propertize-extend-region-functions, as well as two helper functions:
2202 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2203 as-is; and syntax-propertize-rules which provides a new way to specify
2206 *** Syntax tables support a new "comment style c" additionally to style b.
2208 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2210 ** frame-local variables cannot be let-bound any more.
2212 ** Major and minor mode changes
2214 *** `set-auto-mode' now respects mode: local variables at the end of files,
2215 as well as those in the -*- line.
2217 *** `prog-mode' is a new major mode from which programming modes
2220 **** `prog-mode-hook' can be used to enable features for programming
2221 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2222 on-the-fly spell checking for comments and strings.
2224 *** New hook `change-major-mode-after-body-hook', run by
2225 `run-mode-hooks' just before any other mode hooks.
2227 *** Enabled globalized minor modes can be disabled in specific major modes.
2228 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2229 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2231 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2233 ** File-handling changes
2235 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2236 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2237 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2238 argument is supplied (see Trash changes, above).
2240 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2242 ** Tool-bars can display separators.
2243 Tool-bar separators are handled like menu separators in menu-bar maps,
2244 i.e. via menu entries of the form `(menu-item "--")'.
2248 *** Animated images support (currently animated gifs only).
2250 **** `image-animated-p' returns non-nil if an image can be animated.
2252 **** `image-animate' animates a supplied image spec.
2254 **** `image-animate-timer' returns the timer object for an image that
2257 *** `image-extension-data' has been renamed to `image-metadata'.
2258 The old name is an obsolete alias to the new one.
2260 *** Image mode can view any image type that ImageMagick supports.
2261 This requires Emacs to be built with ImageMagick support.
2263 **** New function `imagemagick-types', defined if ImageMagick support
2264 is enabled, returns a list of image file extensions that your
2265 ImageMagick installation supports.
2267 **** New function `imagemagick-register-types' enables ImageMagick
2268 image types in Image mode and in `create-image' and other helper
2271 **** New option `imagemagick-types-inhibit' excludes certain
2272 ImageMagick image types from `imagemagick-register-types'.
2274 **** With ImageMagick support, there are extra Image mode commands to
2275 resize and rotate images: `image-transform-fit-to-height',
2276 `image-transform-fit-to-width', `image-transform-set-rotation', and
2277 `image-transform-set-scale'.
2279 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2280 passes it to the mail user agent function. This argument specifies an
2281 action for returning to the caller after finishing with the mail. For
2282 example, this is used by Rmail to optionally delete a mail window.
2284 ** XML and HTML parsing
2285 If Emacs is compiled with libxml2 support, there are two new
2286 functions: `libxml-parse-html-region' (which parses "real world" HTML)
2287 and `libxml-parse-xml-region' (which parses XML). Both return an
2288 Emacs Lisp parse tree.
2290 ** Networking and encryption changes
2292 *** `open-network-stream' can now be used to open an encrypted stream.
2293 It now accepts an optional `:type' parameter for initiating a TLS
2294 connection, directly or via STARTTLS. To do STARTTLS, additional
2295 parameters (`:end-of-command', `:success', `:capabilities-command')
2296 must also be supplied.
2298 *** New library gnutls.el.
2299 The new function `gnutls-available-p' returns non-nil if Emacs is
2300 built with GnuTLS support. The main entry points are
2301 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2302 these functions through `open-network-stream', because that can
2303 upgrade connections through STARTTLS opportunistically or use plain
2304 SSL, depending on your needs. For debugging, set `gnutls-log-level'
2307 *** New primitive `secure-hash' that supports many secure hash algorithms:
2308 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2309 sha1.el has been removed. The `sha1' feature is provided by default.
2313 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2315 ** Progress reporters can now "spin".
2316 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2317 now be nil, or omitted. This makes a "non-numeric" reporter. Each
2318 time you call `progress-reporter-update' on that progress reporter,
2319 with a nil or omitted VALUE argument, the reporter message is
2320 displayed with a "spinning bar".
2322 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
2323 being reverted, even if the buffer has a local `revert-buffer-function'.
2325 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2326 If delayed-warnings-list is non-nil, the command loop calls
2327 `delayed-warnings-hook' after `post-command-hook'. At present, this
2328 is only used by Emacs on some platforms to display warnings during
2329 startup, which might otherwise not be noticed. This uses the
2330 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
2332 ** rx.el has a new `group-n' construct for explicitly numbered groups.
2334 ** New function `make-composed-keymap' that constructs a new keymap
2335 from multiple input maps. You can use this to make a keymap that
2336 inherits from multiple maps, eg:
2337 (set-keymap-parent newmap (make-composed-keymap othermap parent))
2339 ** New function `string-prefix-p'.
2340 (This was actually added in Emacs 23.2 but was not advertised at the time.)
2342 ** New reader macro ## that stands for the empty symbol.
2343 This means that the empty symbol can now be read back. Also, #: by itself
2344 (when not immediately followed by a possible symbol character) stands for
2345 an empty uninterned symbol.
2347 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
2349 ** The following functions and variables are obsolete:
2351 *** `tooltip-use-echo-area' is obsolete.
2352 Rather than setting this to t, disable Tooltip mode instead.
2354 *** buffer-substring-filters is obsolete.
2355 Use `filter-buffer-substring-functions' instead.
2357 *** `byte-compile-disable-print-circle' is obsolete.
2359 *** `deferred-action-list' and `deferred-action-function' are obsolete.
2360 Use `post-command-hook' instead.
2362 *** `font-lock-maximum-size' is obsolete.
2365 * Changes in Emacs 24.1 on Non-Free Operating Systems
2367 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
2368 and also when HOME is set to C:\ by default.
2370 ** New configure.bat options
2372 *** --enable-checking builds Emacs with extra runtime checks.
2374 *** --distfiles specifies files to be included in binary distribution.
2376 *** --without-gnutls disables automatic GnuTLS detection.
2378 *** --lib for general library linkage, works with the USER_LIBS build variable.
2380 ** New make target `dist' to create binary distribution for MS Windows.
2382 ** The Lisp function `w32-default-color-map' is now obsolete.
2383 (It is only used internally in the Emacs C code.)
2385 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2386 reappear on mouse-over. (Requires OS X 10.6 or later.)
2388 ** On Mac OS X, dragging a file into Emacs visits the file, like on
2389 other platforms, rather than inserting its contents into the buffer.
2392 ----------------------------------------------------------------------
2393 This file is part of GNU Emacs.
2395 GNU Emacs is free software: you can redistribute it and/or modify
2396 it under the terms of the GNU General Public License as published by
2397 the Free Software Foundation, either version 3 of the License, or
2398 (at your option) any later version.
2400 GNU Emacs is distributed in the hope that it will be useful,
2401 but WITHOUT ANY WARRANTY; without even the implied warranty of
2402 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2403 GNU General Public License for more details.
2405 You should have received a copy of the GNU General Public License
2406 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
2411 paragraph-separate: "[
\f]*$"