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 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 The configure option `--with-file-notification=LIB' enables file
33 notification support in Emacs. This option's value should be `yes',
34 `no', `gfile', `inotify' or `w32'. `yes' is a synonym for `w32' on
35 MS-Windows, and for `gfile' otherwise. The default value is `yes'.
37 ** The configure option --with-crt-dir has been removed.
38 It is no longer needed, as the crt*.o files are no longer linked
41 ** Emacs for MS-Windows can now be built by running the configure script
42 using the MSYS environment and MinGW development tools.
43 This is from now on the preferred method of building Emacs on
44 MS-Windows. The Windows-specific configure.bat and makefile.w32-in
45 files are deprecated. See the file nt/INSTALL.MSYS for detailed
48 Using the Posix configure script and Makefile's also means a change in
49 the directory structure of the Emacs installation on Windows. It is
50 now the same as on GNU and Unix systems. In particular, the auxiliary
51 programs, such as cmdproxy.exe and hexl.exe, are in
52 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
53 version), version-independent site-lisp is in share/emacs/site-lisp,
54 version-specific Lisp files are in share/emacs/VERSION/lisp and in
55 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
56 files are in share/emacs/VERSION/etc. (Emacs knows about all these
57 directories and will find the files in there automatically; there's no
58 need to set any variables due to this change.)
60 ** Directories passed to configure option `--enable-locallisppath' are
61 no longer created during installation.
64 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
65 pkg-config is required to find ImageMagick libraries.
68 * Startup Changes in Emacs 24.4
71 * Changes in Emacs 24.4
73 ** Key ? also describes prefix bindings like C-h.
76 ** `apropos-variable' is now `apropos-user-option'
77 `apropos-user-option' shows all user options while `apropos-variable'
78 shows all variables. When called with a universal prefix argument,
79 the two commands swap their behaviors. When `apropos-do-all' is
80 non-nil, they output the same results.
83 ** `eval-defun' on an already defined defcustom calls the :set function,
86 ** If the new variable `enable-dir-local-variables' is nil,
87 directory local variables are ignored. May be useful for some modes
88 that want to ignore directory-locals while still respecting file-locals.
90 ** The option `set-mark-default-inactive' has been deleted.
91 This unfinished feature was introduced by accident in Emacs 23.1;
92 simply disabling Transient Mark mode does the same thing.
94 ** `initial-buffer-choice' can now specify a function to set up the
97 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
98 You may think of it as a *scratch* buffer whose content is preserved.
99 In fact, it was designed as a replacement for *scratch* buffer and can
100 be used that way by setting `initial-buffer-choice' to `remember-notes'
101 and `remember-notes-buffer-name' to "*scratch*". Without the second
102 change, *scratch* buffer will still be there for notes that do not
103 need to be preserved.
105 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
107 ** ACL support has been added.
109 *** Emacs preserves the ACL entries of files when backing up.
111 *** New functions `file-acl' and `set-file-acl' get and set the ACL
112 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
113 libacl. On MS-Windows, the NT Security APIs are used to emulate the
114 POSIX ACL interfaces.
116 ** New option `scroll-bar-adjust-thumb-portion'.
117 Available only on X, this option allows to control over-scrolling
118 using the scroll bar (i.e. dragging the thumb down even when the end
119 of the buffer is visible).
121 ** New function `add-face-text-property' has been added, which can be
122 used to conveniently prepend/append new face attributes to text.
124 ** In compiled Lisp files, the header no longer includes a timestamp.
126 ** Multi-monitor support has been added.
128 *** New functions `display-monitor-attributes-list' and
129 `frame-monitor-attributes' can be used to obtain information about
130 each physical monitor on multi-monitor setups.
132 *** The functions `display-pixel-width' and `display-pixel-height' now
133 behave consistently among the platforms: they return the pixel width
134 or height for all physical monitors associated with the given display
135 as just they were on X11. To get information for each physical
136 monitor, use the new functions above. Similar notes also apply to
137 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
138 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
140 ** New macro `alternatives-define' can be used to define generic commands.
141 Generic commands are interactive functions whose implementation can be
142 selected among several alternatives, as a matter of user preference.
145 * Editing Changes in Emacs 24.4
147 ** `split-window' is no longer a command, just a non-interactive function.
148 As a command it was a special case of `split-window-below', and as such
149 superfluous. After being reimplemented in Lisp, its interactive form
150 was mistakenly retained.
152 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
153 bound to <f11> and M-<f10>, respectively.
155 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
159 ** New option `visual-order-cursor-movement'.
160 If this is non-nil, cursor motion with arrow keys will follow the
161 visual order of characters on the screen: <left> always moves to the
162 left, <right> always moves to the right, disregarding the surrounding
163 bidirectional context.
165 ** New command `kmacro-to-register' to store keyboard macros in registers.
169 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
170 You can pick the name of the function and the variables with `C-x 4 a'.
173 * Changes in Specialized Modes and Packages in Emacs 24.4
175 ** `eshell' now supports visual subcommands and options
176 Eshell has been able to handle "visual" commands (interactive,
177 non-line oriented commands such as top that require display
178 capabilities not provided by eshell) by running them in an Emacs
179 terminal emulator. See `eshell-visual-commands'.
181 This feature has been extended to subcommands and options that make a
182 usually line-oriented command a visual command. Typical examples are
183 "git log" and "git <command> --help" which display their output in a
184 pager by default. See `eshell-visual-subcommands' and
185 `eshell-visual-options'.
187 ** If your Emacs is compiled with libxml2 support, you can use the new
188 built-in web browser `eww'.
190 ** `remember' can now store notes in separates files
191 You can use the new function `remember-store-in-files' within the
192 `remember-handler-functions' option.
194 See `remember-data-directory' and `remember-directory-file-name-format'
195 for new options related to this function.
196 ** `ido-decorations' has been slightly extended to give a bit more control.
198 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
200 ~/.emacs.d/timelog replaces ~/.timelog
201 ~/.emacs.d/vip replaces ~/.vip
202 ~/.emacs.d/viper replaces ~/.viper
203 ~/.emacs.d/ido.last replaces ~/.ido.last
204 ~/.emacs.d/kkcrc replaces ~/.kkcrc
205 ~/.emacs.d/quickurls replaces ~/.quickurls
206 ~/.emacs.d/idlwave replaces ~/.idlwave
207 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
208 ~/.emacs.d/places replaces ~/.emacs-places
209 ~/.emacs.d/shadows replaces ~/.shadows
210 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
211 ~/.emacs.d/strokes replaces ~/.strokes
212 ~/.emacs.d/notes replaces ~/.notes
213 ~/.emacs.d/type-break replaces ~/.type-break
214 Also the following files used by the now obsolete otodo-mode.el:
215 ~/.emacs.d/todo-do replaces ~/.todo-do
216 ~/.emacs.d/todo-done replaces ~/.todo-done
217 ~/.emacs.d/todo-top replaces ~/.todo-top
220 ** Delphi mode is now called OPascal mode.
221 *** All delphi-* variables and functions have been renamed to opascal-*.
222 *** `delphi-newline-always-indents' is not supported any more.
223 Use `electric-indent-mode' instead.
224 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
226 ** Eldoc Mode works properly in the minibuffer.
228 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
230 ** completing-read-multiple's separator can now be a regexp.
231 The default separator is changed to allow surrounding spaces around the comma.
235 *** Battery information via the BSD `apm' utility is now supported.
239 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
241 ** Calendar and Diary
244 *** New variable `diary-from-outlook-function', used by the command
245 `diary-from-outlook'.
249 *** New macro cl-tagbody.
252 *** letf is now just an alias for cl-letf.
256 *** Calc by default now uses the Gregorian calendar for all dates, and
257 uses January 1, 1 AD as its day number 1. Previously Calc used the
258 Julian calendar for dates before September 14, 1752, and it used
259 December 31, 1 BC as its day number 1; the new scheme is more
260 consistent with Calendar's calendrical system and day numbering.
262 *** The new variable `calc-gregorian-switch' lets you configure the
263 date when Calc switches from the Julian to the Gregorian calendar.
264 Nil, the default value, means to always use the Gregorian calendar.
265 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
268 *** Support for ISO 8601 dates.
272 *** `desktop-auto-save-timeout' defines the number of seconds between
273 auto-saves of the desktop.
275 *** `desktop-restore-frames' enables saving and restoring the window/frame
280 *** New minor mode `dired-hide-details-mode' hides details.
284 *** New option `erc-accidental-paste-threshold-seconds'.
285 If set to a number, this can be used to avoid accidentally paste large
286 amounts of data into the ERC input.
289 ** New F90 mode option `f90-smart-end-names'.
291 ** Icomplete is a bit more like Ido.
292 *** key bindings to navigate through and select the completions.
293 *** The icomplete-separator is customizable, and its default has changed.
294 *** Removed icomplete-show-key-bindings.
298 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
299 visit the next image file and the previous image file in the same
300 directory, respectively.
302 *** New commands to show specific frames of multi-frame images.
303 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
304 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
307 *** The command `image-mode-fit-frame' deletes other windows.
308 When toggling, it restores the frame's previous window configuration.
309 It also has an optional frame argument, which can be used by Lisp
310 callers to fit the image to a frame other than the selected frame.
314 *** New face `info-index-match' is used to highlight matches in index
315 entries displayed by `Info-index-next', `Info-virtual-index' and
320 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
321 will cycle through faces in `hi-lock-face-defaults' without prompting.
324 *** New global command `M-s h .' (`highlight-symbol-at-point')
325 highlights the symbol found near point without prompting,
326 using the next face automatically.
328 ** Search and Replace
330 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
331 starts a symbol (identifier) incremental search forward with the
332 symbol found near point added to the search string initially.
334 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
335 and adds it to the search string.
337 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
338 between nil and the value of the option `search-invisible' (or `open'
341 *** `query-replace' skips invisible text when `search-invisible' is nil,
342 and opens overlays with hidden text when `search-invisible' is `open'.
345 *** By default, prefix arguments do not now terminate Isearch mode.
346 Set `isearch-allow-prefix' to nil to restore old behavior.
348 *** More Isearch commands accept prefix arguments, namely
349 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
352 *** Word search now matches whitespace at the beginning/end
353 of the search string if it contains leading/trailing whitespace.
354 In an incremental word search or when using a non-nil LAX argument
355 of `word-search-regexp', the lax matching can also match part of
356 the first word (in addition to the lax matching of the last word).
357 The same rules are now applied to the symbol search with the difference
358 that it matches symbols, and non-symbol characters between symbols.
360 ** MH-E has been updated to MH-E version 8.5.
361 See MH-E-NEWS for details.
364 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
365 Customize `unrmail-mbox-format' to change this.
368 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
369 of how Rmail displays non-MIME messages.
372 ** New function `ses-rename-cell' to give SES cells arbitrary names.
374 ** trace-function was largely rewritten.
375 New features include:
376 - no prompting for the destination buffer, unless a prefix-arg was used.
377 - additionally to prompting for a destination buffer, when a prefix-arg is
378 used, the user can enter a "context", i.e. Lisp expression whose value at the
379 time the function is entered/exited will be printed along with the function
380 name and arguments. Useful to trace the value of (current-buffer) or
381 (point) when the function is invoked.
383 ** New command `delete-duplicate-lines' has new types of operation:
384 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
385 it works like the utility `uniq'. Otherwise by default it deletes
386 duplicate lines everywhere in the region without regard to adjacency.
387 When its arg KEEP-BLANKS is non-nil (when called interactively with
388 C-u C-u C-u), duplicate blank lines are preserved.
390 ** New `cycle-spacing' command allows cycling between having just one
391 space, no spaces, or reverting to the original spacing. Like
392 `just-one-space' command it can handle or ignore newlines and
393 leave different number of spaces.
395 ** Todo mode has been rewritten and enhanced.
396 New features include:
397 - support for multiple todo files and archive files of done items;
398 - renaming, reordering, moving, merging, and deleting categories;
399 - sortable tabular summaries of categories and the types of items they contain;
400 - cross-category lists of items filtered by specific criteria;
401 - more fine-grained interaction with the Emacs diary, by being able to decide
402 for each todo item whether it appears in the Fancy Diary display;
403 - highly flexible new item insertion and item editing;
404 - moving items between categories, storing done items in their category or in
405 archive files, undoing or unarchiving done items;
406 - reprioritizing items by inputting a numerical priority;
407 - extensive customizability of operation and display, including numerous faces.
408 To support some of these features, a new file format is used, which is
409 incompatible with the old format; however, you can convert old todo and done
410 item files to the new format on initializing the first new todo file, or at any
411 later time with the provided conversion command. The old version of
412 todo-mode.el has been made obsolete and renamed otodo-mode.el.
417 *** New connection method "adb", which allows to access Android
418 devices by the Android Debug Bridge. The variable `tramp-adb-program'
419 can be used to adapt the path of the "adb" program, if needed.
421 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
422 "scpc" and "rsyncc" are discontinued. The ssh option
423 "ControlMaster=auto" is set automatically in all ssh-based methods,
427 *** Handlers for `file-acl' and `set-file-acl' for remote machines
428 which support POSIX ACLs.
431 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
432 for remote machines which support filesystem notifications.
436 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
438 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
442 *** The commands `woman-default-faces' and `woman-monochrome-faces'
443 are obsolete. Customize the `woman-*' faces instead.
447 *** Added Eshell-Tramp module
448 External su and sudo commands are now the default; the internal,
449 Tramp-using variants can still be used by enabling the eshell-tramp
452 ** New term.el option `term-suppress-hard-newline'.
454 ** Obsolete packages:
456 *** longlines.el is obsolete; use visual-line-mode instead.
461 *** terminal.el is obsolete; use term.el instead.
463 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
468 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
471 *** The Info-edit command is obsolete. Editing Info nodes by hand
472 has not been relevant for some time.
475 * New Modes and Packages in Emacs 24.4
477 ** New `superword-mode' in subword.el
478 `superword-mode' overrides the default word motion commands to treat
479 symbol_words as a single word, similar to what `subword-mode' does and
480 using the same internal functions.
482 ** New nadvice.el package offering lighter-weight advice facilities.
484 - add-function/remove-function which can be used to add/remove code on any
485 function-carrying place, such as process-filters or `<foo>-function' hooks.
486 - advice-add/advice-remove to add/remove a piece of advice on a named function,
487 much like `defadvice' does.
489 ** The package file-notify.el provides an interface for file system
490 notifications. It requires, that Emacs is compiled with one of the
491 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
494 * Incompatible Lisp Changes in Emacs 24.4
496 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
497 Some languages match those as »...« and others as «...» so better stay neutral.
499 ** The default file coding for Emacs Lisp files is now utf-8.
500 (See file-coding-system-alist.) In most cases, this change is transparent, but
501 files that contain unusual characters without specifying an explicit coding
502 system may fail to load with obscure errors.
503 You should either convert them to utf-8 or add an explicit `coding:' cookie.
505 ** overriding-terminal-local-map does not replace the local keymaps any more.
506 It used to disable the minor mode, major mode, and text-property keymaps,
507 whereas now it simply has higher precedence.
509 ** Default process filters and sentinels are not nil any more.
510 Instead they default to a function which does what the nil value used to do.
512 ** `read-event' does not return decoded chars in ttys any more.
513 Just as was the case in Emacs-22 and before, decoding of tty input according to
514 keyboard-coding-system is not performed in read-event any more. But contrary
515 to that past, it is still done before input-decode-map/function-key-map/...
517 ** Removed inhibit-local-menu-bar-menus.
519 ** frame-local variables that affect redisplay do not work any more.
520 More specifically, the redisplay does not bother to check for a frame-local
521 value when looking up variables.
523 ** nil and "unbound" are indistinguishable in symbol-function.
524 `symbol-function' never signals `void-function' any more.
525 `fboundp' returns non-nil if the symbol was `fset' to nil.
527 ** `defadvice' does not honor the `freeze' flag and cannot advise
528 special-forms any more.
530 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
531 VAR was bound to nil which was not tremendously useful and just lead to
532 spurious warnings about an unused var.
534 ** The return value of `backup-buffer' has changed.
535 The second argument is no longer an SELinux context, instead it is an
536 alist of extended attributes as returned by the new function
537 `file-extended-attributes'. The attributes can be applied to another
538 file using `set-file-extended-attributes'.
540 ** `visited-file-modtime' now returns -1 for nonexistent files.
541 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
542 in the presence of files with negative time stamps.
544 * Lisp Changes in Emacs 24.4
546 ** New hook `tty-setup-hook'.
549 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
551 ** Obsoleted functions:
554 *** `lisp-complete-symbol'
556 *** `minibuffer-completion-contents'
557 *** `isearch-nonincremental-exit-minibuffer'
558 *** `isearch-filter-visible'
559 *** `generic-make-keywords-list'
561 ** `with-wrapper-hook' is obsoleted by `add-function'.
562 The few hooks that used with-wrapper-hook are replaced as follows:
563 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
564 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
565 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
568 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
570 ** Support for filesystem notifications.
571 Emacs now supports notifications of filesystem changes, such as
572 creation, modification, and deletion of files. This requires the
573 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
574 MS-Windows systems, this is supported for Windows XP and newer
577 ** Changes in autorevert.el
580 *** If Emacs is compiled with file notification support, notifications
581 are used instead of checking the time stamp of the files. You can
582 disable this by setting the user option `auto-revert-use-notify' to
583 nil. Alternatively, a regular expression of directories to be
584 excluded from file notifications can be specified by
585 `auto-revert-notify-exclude-dir-regexp'.
588 *** The new user option `auto-revert-remote-files' enables reversion
589 of remote files when set to non-nil.
593 *** The function `face-spec-set' is now analogous to `setq' for face specs.
594 Its third arg now accepts values specifying exactly which face spec to
595 set (defface, custom, or user spec), and it directly sets the relevant
596 property using the supplied face spec.
598 *** Face specs set via Custom themes now replace the `defface' spec
599 rather than inheriting from it (as do face specs set via Customize).
601 *** New face characteristic (supports :underline (:style wave))
602 specifies whether or not the terminal can display a wavy line.
607 *** `image-animated-p' is now `image-multi-frame-p'.
608 It returns non-nil for any image that contains multiple frames,
609 whether or not it specifies a frame delay.
612 *** When animating images that do not specify a frame delay,
613 Emacs uses `image-default-frame-delay'.
616 *** New functions `image-current-frame' and `image-show-frame' for getting
617 and setting the current frame of a multi-frame image.
619 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
620 with the same interpretation as the returned value of `visited-file-modtime'.
622 ** time-to-seconds is not obsolete any more.
623 ** New function special-form-p.
624 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
625 text-property on the first char.
627 ** The `defalias-fset-function' property lets you catch calls to defalias
628 and redirect them to your own function instead of `fset'.
630 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
631 When you edit DIR/FILE, Emacs normally creates a symbolic link
632 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
633 is being edited. Formerly, if there was already a non-symlink file
634 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
635 through DIR/.#FILE.9. These fallbacks have been removed, so that
636 Emacs now no longer locks DIR/FILE in that case.
638 On file systems that do not support symbolic links, the lock is now a
639 regular file with contents being what would have been in the symlink.
641 ** The 9th element returned by `file-attributes' is now unspecified.
642 Formerly, it was t if the file's gid would change if file were deleted
643 and recreated. This value has been inaccurate for years on many
644 platforms, and nobody seems to have noticed or cared.
646 ** The function `file-ownership-preserved-p' now has an optional
647 argument GROUP which causes it check for file group too. This can be
648 used in place of the 9th element of `file-attributes'.
650 ** New functions `group-gid' and `group-real-gid'.
652 ** The 6th argument to `copy-file' has been renamed to
653 `preserve-extended-attributes' as it now handles both SELinux context
656 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
658 *** The package descriptor and name of global variables, constants,
659 and functions should be separated by two hyphens if the symbol is not
660 meant to be used by other packages.
663 * Changes in Emacs 24.4 on Non-Free Operating Systems
666 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
667 The backtrace is written to the 'emacs_backtrace.txt' file in the
668 directory where Emacs was running.
671 ** The variable `buffer-file-type' is no longer supported.
672 Setting it has no effect, and %t in the mode-line format is ignored.
673 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
674 modifying it has no effect.
677 ** Lock files now work on MS-Windows.
678 This allows to avoid losing your edits if the same file is being
679 edited in another Emacs session or by another user. See the node
680 "Interlocking" in the Emacs User Manual for the details. To disable
681 file locking, customize `create-lockfiles' to nil.
683 ** Improved fullscreen support on Mac OS X.
684 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
685 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
686 native is the default.
689 * Installation Changes in Emacs 24.3
691 ** The default X toolkit is now Gtk+ version 3.
692 If you don't pass `--with-x-toolkit' to configure, or if you use
693 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
694 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
695 You can explicitly require a specific version by passing
696 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
698 ** New configure option `--enable-link-time-optimization', to utilize
699 an appropriate feature provided by GCC since version 4.5.0.
701 ** New configure option `--without-all' to disable most of the optional
702 features (image support, etc.) that are normally enabled by default.
704 ** New configure option `--enable-gcc-warnings' (for developing/debugging
705 Emacs). If building with GCC, this enables compile-time checks that
706 warn/give errors about possibly-questionable C code. On a recent GNU
707 system there should be no warnings; on older and on non-GNU systems
708 the results may be useful to developers.
710 ** The configure option `--enable-use-lisp-union-type' has been
711 renamed to `--enable-check-lisp-object-type', as the resulting
712 Lisp_Object type no longer uses a union to implement the compile time
713 check that this option enables.
715 ** The configure option `--disable-maintainer-mode' has been removed,
716 as it was confusingly-named and rarely useful.
718 ** The configure options `--program-prefix', `--program-suffix', and
719 `--program-transform-name' apply to more than just the installed
720 binaries. Now they also affect the man pages, icons, and the
721 etc/emacs.desktop file; but not the info pages, since this would break
722 links between the various manuals.
724 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
725 overwriting "emacs" in the installation bin/ directory with a link
728 ** Emacs uses libtinfo in preference to libncurses, if available.
730 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
731 /usr/pkg/lib to the linker search path. You must add them yourself if
734 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
735 (from the bin and libexec directories, respectively). The former is
736 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
739 * Startup Changes in Emacs 24.3
741 ** Emacs no longer searches for `leim-list.el' files beneath the standard
742 lisp/ directory. There should not be any there anyway. If you have
743 been adding them there, put them somewhere else; e.g., site-lisp.
745 ** The `--no-site-lisp' command line option now works for Nextstep builds.
748 * Changes in Emacs 24.3
752 *** `C-h f' (`describe-function') can now perform autoloading.
753 When this command is called for an autoloaded function whose docstring
754 contains a key substitution construct, that function's library is
755 automatically loaded, so that the documentation can be shown
756 correctly. To disable this, set `help-enable-auto-load' to nil.
758 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
759 even after their associated libraries have been loaded (and the
760 autoloads have been redefined as functions).
764 *** Images displayed via ImageMagick now support transparency and the
765 :background image specification property.
767 *** When available, ImageMagick support is automatically enabled.
768 It is no longer necessary to call `imagemagick-register-types'
769 explicitly to install ImageMagick image types; that function is called
770 automatically at startup, or when customizing an imagemagick- option.
772 *** Setting `imagemagick-types-inhibit' to t now disables the use of
773 ImageMagick to view images. (You must call `imagemagick-register-types'
774 afterwards if you do not use customize to change this.)
776 *** The new variable `imagemagick-enabled-types' also affects which
777 ImageMagick types are treated as images. The function
778 `imagemagick-filter-types' returns the list of types that will be
781 *** ImageMagick images now support the :max-width and :max-height
786 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
787 next and previous path separator, respectively.
789 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
790 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
791 non-nil before enabling the mode.
795 *** New option `mode-line-default-help-echo' specifies the help text
796 (shown in a tooltip or in the echo area) for any part of the mode line
797 that does not have its own specialized help text.
799 *** You can now click mouse-3 in the coding system indicator to invoke
800 `set-buffer-file-coding-system'.
804 *** emacsclient now obeys string values for `initial-buffer-choice',
805 if it is told to open a new frame without specifying any file to visit
806 or expression to evaluate.
808 *** New option `server-auth-key' specifies a shared server key.
810 ** Emacs now generates backtraces on fatal errors.
811 On encountering a fatal error, Emacs now outputs a textual description
812 of the fatal signal, and a short backtrace on platforms like glibc
813 that support backtraces.
815 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
816 This minor mode replaces `toggle-read-only', which is now obsolete.
818 ** Most `y-or-n' prompts now allow you to scroll the selected window.
819 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
820 respectively, without exiting from the prompt.
822 ** In the Package Menu, newly-available packages are listed as "new",
823 and sorted above the other "available" packages by default.
825 ** If your Emacs was built from a bzr checkout, the new variable
826 `emacs-bzr-version' contains information about the bzr revision used.
828 ** New option `create-lockfiles' specifies usage of lockfiles.
829 It defaults to t. Changing it to nil inhibits the creation of lock
830 files (use this with caution).
832 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
833 variables on remote hosts.
835 ** The entry for PCL-CVS has been removed from the Tools menu.
836 The PCL-CVS commands are still available via the keyboard.
838 ** Using "unibyte: t" in Lisp source files is obsolete.
839 Use "coding: raw-text" instead.
841 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
842 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
843 The previous binding, introduced in Emacs 24.1, was a mistake, because
844 `C-c LETTER' bindings are reserved for user customizations.
846 ** Internationalization
848 *** New language environment: Persian.
850 *** New input method `vietnamese-vni'.
852 ** Nextstep (GNUstep / Mac OS X) port
854 *** Support for fullscreen and the frame parameter fullscreen.
856 *** A file dialog is used for open/save operations initiated from the
860 * Editing Changes in Emacs 24.3
862 ** Search and Replace
864 *** Non-regexp Isearch now performs "lax" space matching.
865 Each sequence of spaces in the supplied search string may match any
866 sequence of one or more whitespace characters, as specified by the
867 variable `search-whitespace-regexp'. (This variable is also used by a
868 similar existing feature for regexp Isearch.)
870 *** New Isearch command `M-s SPC' toggles lax space matching.
871 This applies to both ordinary and regexp Isearch.
873 *** New option `replace-lax-whitespace'.
874 If non-nil, `query-replace' uses flexible whitespace matching too.
877 *** Global `M-s _' starts a symbol (identifier) incremental search,
878 and `M-s _' in Isearch toggles symbol search mode.
879 `M-s c' in Isearch toggles search case-sensitivity.
881 ** Navigation commands
883 *** New binding `M-g c' for `goto-char'.
885 *** New binding `M-g TAB' for `move-to-column'.
887 *** `M-g TAB' (`move-to-column') prompts for a column number if called
888 interactively with no prefix arg. Previously, it moved to column 1.
890 ** New option `yank-handled-properties' allows processing of text
891 properties on yanked text, in ways that are more general than just
892 removing them (as is done by `yank-excluded-properties').
894 ** New option `delete-trailing-lines' specifies whether
895 M-x delete-trailing-whitespace should delete trailing lines at the end
896 of the buffer. It defaults to t.
898 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
900 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
901 `ucs-insert' is now an obsolete alias for `insert-char'.
903 ** The `z' key no longer has a binding in most special modes.
904 It used to be bound to `kill-this-buffer', but `z' is too easy to
907 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
908 It copies the region-rectangle as the last rectangle kill.
912 *** `C-x r +' is now overloaded to invoke `append-to-register'.
914 *** New option `register-separator' specifies the register containing
915 the text to put between collected texts for use with
916 M-x append-to-register and M-x prepend-to-register.
919 * Changes in Specialized Modes and Packages in Emacs 24.3
921 ** Common Lisp emulation (CL)
923 *** CL's main entry is now (require 'cl-lib).
924 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
925 i.e., all its definitions have the "cl-" prefix (and internal definitions
926 use the "cl--" prefix).
928 If `cl' provided a feature under the name `foo', then `cl-lib'
929 provides it under the name `cl-foo' instead; with the exceptions of the
930 few `cl' definitions that had to use `foo*' to avoid conflicts with
931 pre-existing Elisp entities. These have been renamed to `cl-foo'
932 rather than `cl-foo*'.
934 The old `cl' is now deprecated and is mainly just a bunch of aliases that
935 provide the old, non-prefixed names. Some exceptions are listed below:
937 *** `cl-flet' is not like `flet' (which is deprecated).
938 Instead it obeys the behavior of Common-Lisp's `flet'.
939 In particular, in cl-flet function definitions are lexically scoped,
940 whereas in flet the scoping is dynamic.
942 *** `cl-labels' is slightly different from `labels'.
943 The difference is that it relies on the `lexical-binding' machinery
944 (as opposed to the `lexical-let' machinery used previously) to capture
945 definitions in closures, so such closures will only work if `lexical-binding'
948 *** `cl-letf' is not exactly like `letf'.
949 The only difference is in details that relate to some deprecated usage
950 of `symbol-function' in place forms.
952 *** `progv' was rewritten to use the `let' machinery.
953 A side effect is that variables without corresponding values are bound
954 to nil rather than being made unbound.
956 *** The following methods of extending `setf' are obsolete
957 (use features from gv.el instead):
958 `define-modify-macro' (use `gv-letplace')
959 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
960 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
961 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
965 *** Changes are now highlighted using the same color scheme as in
966 modern VCSes. Deletions are displayed in red (new faces
967 `diff-refine-removed' and `smerge-refined-removed', and new definition
968 of `diff-removed'), insertions in green (new faces `diff-refine-added'
969 and `smerge-refined-added', and new definition of `diff-added').
971 *** The variable `diff-use-changed-face' defines whether to use the
972 face `diff-changed', or `diff-removed' and `diff-added' to highlight
973 changes in context diffs.
975 *** The new command `diff-delete-trailing-whitespace' removes trailing
976 whitespace introduced by a diff.
978 ** Ediff now uses the same color scheme as Diff mode.
982 A new version of python.el, which provides several new features, including:
983 per-buffer shells, better indentation, Python 3 support, and improved
984 shell-interaction compatible with iPython (and virtually any other
987 *** Some user options have been replaced/renamed, including (old -> new):
988 **** python-indent -> python-indent-offset
989 **** python-guess-indent -> python-indent-guess-indent-offset
990 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
991 **** python-use-skeletons -> python-skeleton-autoinsert
993 *** Some user options have been removed, including:
995 **** `python-indent-string-contents': Strings are never indented.
997 **** `python-honour-comment-indentation':
998 Comments are always considered as indentation markers.
1000 **** `python-continuation-offset': Indentation is automatically
1001 calculated in a pep8 compliant way depending on the context.
1003 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1004 Have no direct mapping as the shell interaction is completely different.
1006 **** `python-python-command', `python-jython-command':
1007 Replaced by `python-shell-interpreter'.
1009 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1010 `python-pdbtrack-minor-mode-string', `python-source-modes':
1013 *** Some commands have been replaced (old -> new):
1014 **** python-insert-class -> python-skeleton-class
1015 **** python-insert-def -> python-skeleton-def
1016 **** python-insert-for -> python-skeleton-for
1017 **** python-insert-if -> python-skeleton-if
1018 **** python-insert-try/except -> python-skeleton-try
1019 **** python-insert-try/finally -> python-skeleton-try
1020 **** python-insert-while -> python-skeleton-while
1021 **** python-find-function -> python-nav-jump-to-defun
1022 **** python-next-statement -> python-nav-forward-sentence
1023 **** python-previous-statement -> python-nav-backward-sentence
1024 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1025 **** python-end-of-defun-function -> python-nav-end-of-defun
1026 **** python-send-buffer -> python-shell-send-buffer
1027 **** python-send-defun -> python-shell-send-defun
1028 **** python-send-region -> python-shell-send-region
1029 **** python-send-region-and-go -> emulate with python-shell-send-region
1030 and python-shell-switch-to-shell
1031 **** python-send-string -> python-shell-send-string
1032 **** python-switch-to-python -> python-shell-switch-to-shell
1033 **** python-describe-symbol -> python-eldoc-at-point
1037 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1039 *** The D-Bus object manager interface is implemented.
1041 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1042 if their value does not fit into Emacs's integer range.
1044 *** The function `dbus-call-method' is now non-blocking.
1045 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1047 *** Signals can also be sent as unicast messages.
1049 *** The argument list of `dbus-register-signal' has been extended,
1050 according to the new match rule types of D-Bus.
1052 *** `dbus-init-bus' supports private connections.
1054 *** There is a new function `dbus-setenv'.
1056 ** `desktop-path' no longer includes the "." directory.
1057 Desktop files are now located in ~/.emacs.d by default.
1061 *** `dired-do-async-shell-command' executes each file sequentially
1062 if the command ends in `;' (when operating on multiple files).
1063 Otherwise, it executes the command on each file in parallel.
1065 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1066 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1069 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1070 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1071 mark/unmark/flag all files in the active region.
1073 *** The minibuffer default for `=' (`dired-diff') has changed.
1074 It is now the backup file for the file at point, if one exists.
1075 In Transient Mark mode the default is the file at the active mark.
1077 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1078 The global binding for `M-=', `count-words-region' is in effect.
1082 *** New module "notifications", which can send a notification when you
1083 receive a private message or your nickname is mentioned.
1085 *** ERC will look up server/channel names via auth-source and use any
1088 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1089 only applies to messages sent by lurkers.
1091 ** reStructuredText mode
1093 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1094 fontification, comment handling, and customization have all been revised
1097 *** Support for `imenu' and `which-function-mode'.
1099 *** The reStructuredText syntax is more closely covered.
1100 Sphinx support has been improved.
1102 *** `rst-insert-list' inserts new list or continues existing lists.
1104 *** A negative prefix argument always works for `rst-adjust'.
1106 *** The window configuration is reset after displaying a TOC.
1108 *** The constant `rst-version' describes the rst.el package version.
1112 *** Support for percent literals and recognition of regular expressions
1113 in method calls without parentheses with more methods, including Cucumber
1116 *** Improved syntax highlighting and indentation.
1118 *** New command `ruby-toggle-block', bound to `C-c {'.
1120 *** Some non-standard keybindings/commands have been removed:
1122 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1124 **** `ruby-mark-defun'; use `mark-defun'.
1126 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1127 appropriate settings for the variables `beginning-of-defun-function'
1128 and `end-of-defun-function'.
1130 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1131 `reindent-then-newline-and-indent' and `newline' have been removed.
1133 ** Shell Script mode
1135 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1137 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1139 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1143 *** The free software compiler GHDL is supported (and now the default).
1145 *** Support for the VHDL-AMS packages has been added/updated.
1147 *** Updated to the 2002 revision of the VHDL standard.
1149 *** Accepts \r and \f as whitespace.
1153 *** The faces used by Apropos are now directly customizable.
1154 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1155 see the `apropos' Custom group for details.
1157 *** The old options whose values specified faces to use have been removed
1158 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1162 *** This package has been rewritten to use Tabulated List mode.
1164 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1165 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1169 *** Algebraic simplification mode is now the default.
1170 To restrict to the limited simplifications given by the former
1171 default simplification mode, use `m I'.
1175 *** You can customize the header text that appears above each calendar month.
1176 See the variable `calendar-month-header'.
1178 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1180 *** The calendars produced by cal-html include holidays.
1181 Customize `cal-html-holidays' to change this.
1185 *** The major modes from the parser generators "Bovine" and "Wisent"
1186 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1187 are in `auto-mode-alist', and the corresponding manuals are included.
1191 **** Menu support for the "Configuration" feature. This allows users to
1192 choose the active configuration (such as debug or install) from the menu.
1194 **** New command `ede-set' to interactively set project-local variables.
1196 **** Support for compiling, debugging, and running in "generic" projects.
1198 **** Autoconf editing support for M4 macros with complex arguments.
1200 **** Compilation support for the "linux" project type.
1202 **** "simple" projects have been removed; use "generic" projects instead.
1206 **** Support for parsing #include statements inside a namespace in C/C++.
1208 **** Improved support for 'extern "C"' declarations in C/C++.
1210 **** The ability to ignore more common special C/C++ preprocessor symbols,
1211 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1212 If available, include cdefs.h as an additional source of preprocessor symbols.
1214 **** Improved C/C++ function pointer parsing.
1216 **** In Python, support for converting imports to include file names.
1218 **** Ability to dynamically determine the Python load path.
1220 **** Support for the Python 'WITH' and 'AT' keywords.
1222 **** Improved tooltip completion.
1226 **** The SRecode manual is now included.
1228 **** Tag generation supports constructor/destructor settings and system
1229 include differentiation.
1231 **** Addition of 'Framework' support: Frameworks are specified when a
1232 particular kind of library (such as Android) is needed in a common language
1235 **** Support for nested templates and let variables override based on priority.
1237 **** Support for merging tables from multiple related modes, such as
1238 default -> c++ -> arduino.
1240 ** Compile has a new option `compilation-always-kill'.
1244 *** `custom-reset-button-menu' now defaults to t.
1246 *** Non-option variables are never matched in `customize-apropos' and
1247 `customize-apropos-options' (i.e., the prefix argument does nothing for
1248 these commands now).
1252 *** The variables `term-default-fg-color' and `term-default-bg-color'
1253 are now deprecated in favor of the customizable face `term'.
1255 *** You can customize how to display ANSI terminal colors and styles
1256 by customizing the corresponding `term-color-<COLOR>',
1257 `term-color-underline' and `term-color-bold' faces.
1261 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1263 *** Remote processes are now also supported on remote MS-Windows hosts.
1267 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1268 Previously, this slot stored semicolon-separated attribute-value pairs
1269 appended to some imap URLs, but this is not compatible with RFC 3986.
1270 So now the `filename' slot stores the entire path and query components,
1271 and the `attributes' slot is always nil.
1273 *** New function `url-encode-url' for encoding a URI string.
1274 The `url-retrieve' function now uses this to encode its URL argument,
1275 in case that is not properly encoded.
1277 *** New command `url-cookie-list' displays all the current cookies, and
1278 allows deleting selected cookies.
1280 ** notifications.el supports now version 1.2 of the Notifications API.
1281 The function `notifications-get-capabilities' returns the supported
1284 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1285 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1286 `flymake-warning-bitmap'.
1288 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1289 specifying URL types that should be converted to remote file names at
1290 the FFAP prompt. The default is now '("ftp").
1292 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1293 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1295 ** New option `mouse-avoidance-banish-position' specifies where the
1296 `banish' mouse avoidance setting moves the mouse.
1298 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1299 closing brackets to be aligned with the line of the opening bracket.
1301 ** In Proced mode, new command `proced-renice' renices marked processes.
1303 ** New option `async-shell-command-buffer' specifies the buffer to use
1304 for a new asynchronous `shell-command' when the default output buffer
1305 `*Async Shell Command*' is already in use.
1307 ** SQL mode has a new option `sql-db2-escape-newlines'.
1308 If non-nil, newlines sent to the command interpreter will be escaped
1309 by a backslash. The default does not escape the newlines and assumes
1310 that the sql statement will be terminated by a semicolon.
1312 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1313 (and modes that derive from it), sorts the column at point, or the Nth
1314 column if a numeric prefix argument is given.
1316 ** `which-func-modes' now defaults to t, so Which Function mode, when
1317 enabled, applies to all applicable major modes.
1319 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1322 ** Follow mode no longer works by using advice.
1323 The option `follow-intercept-processes' has been removed.
1325 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1327 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1328 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1329 *** semantic-change-hooks -> semantic-change-functions
1330 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1331 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1332 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1333 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1334 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1335 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1336 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1337 *** rcirc-activity-hooks -> rcirc-activity-functions
1338 *** rcirc-print-hooks -> rcirc-print-functions
1339 *** dbus-event-error-hooks -> dbus-event-error-functions
1340 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1341 *** checkdoc-style-hooks -> checkdoc-style-functions
1342 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1343 *** archive-extract-hooks -> archive-extract-hook
1344 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1345 *** hfy-post-html-hooks -> hfy-post-html-hook
1346 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1347 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1348 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1349 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1351 ** Obsolete packages
1354 In most cases, assoc+member+push+delq work just as well.
1355 And in any case it's just a terrible package: ugly semantics, terrible
1356 inefficiency, and not namespace-clean.
1365 * Incompatible Lisp Changes in Emacs 24.3
1367 ** Docstrings starting with `*' no longer indicate user options.
1368 Only variables defined using `defcustom' are considered user options.
1369 The function `user-variable-p' is now an obsolete alias for
1370 `custom-variable-p'.
1372 ** The return values of `defalias', `defun' and `defmacro' have changed,
1373 and are now undefined. For backwards compatibility, `defun' and
1374 `defmacro' currently return the name of the newly defined
1375 function/macro, but this should not be relied upon.
1377 ** `random' by default now returns a different random sequence in
1378 every Emacs run. Use `(random S)', where S is a string, to set the
1379 random seed to a value based on S, in order to get a repeatable
1380 sequence in later calls.
1382 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1383 that substring is inserted literally even if the LITERAL arg is
1384 non-nil, instead of causing an error to be signaled.
1386 ** `select-window' now always makes the window's buffer current.
1387 It does so even if the window was selected before.
1389 ** The function `x-select-font' can return a font spec, instead of a
1390 font name as a string. Whether it returns a font spec or a font name
1391 depends on the graphical library.
1393 ** `face-spec-set' no longer sets frame-specific attributes when the
1394 third argument is a frame (that usage was obsolete since Emacs 22.2).
1396 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1398 ** The CL package's `get-setf-method' function no longer exists.
1399 Generalized variables are now part of core Emacs Lisp, and implemented
1400 differently to the way cl.el used to do it. It is not possible to
1401 define a compatible replacement for `get-setf-method'. See the file
1402 gv.el for internal details of the new implementation.
1404 ** The arguments of `dbus-register-signal' are no longer just strings,
1405 but keywords or keyword-string pairs. The old argument list will
1406 still be supported for Emacs 24.x.
1408 ** Miscellaneous name changes
1409 Some Lisp symbols have been renamed to correct their spelling,
1410 or to be more consistent with standard Emacs terminology.
1412 *** Renamed functions
1413 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1414 **** inactivate-input-method -> deactivate-input-method
1415 **** quail-inactivate -> quail-deactivate
1416 **** robin-inactivate -> robin-deactivate
1417 **** viper-inactivate-input-method -> viper-deactivate-input-method
1418 **** viper-inactivate-input-method-action ->
1419 viper-deactivate-input-method-action
1420 **** ucs-input-inactivate -> ucs-input-deactivate
1423 The old hooks are still supported for backward compatibility, but they
1424 are deprecated and will be removed eventually.
1425 **** input-method-inactivate-hook -> input-method-deactivate-hook
1426 **** robin-inactivate-hook -> robin-deactivate-hook
1427 **** quail-inactivate-hook -> quail-deactivate-hook
1429 *** Renamed variables
1430 **** follow-deactive-menu -> follow-inactive-menu
1431 **** inactivate-current-input-method-function ->
1432 deactivate-current-input-method-function
1434 ** Some obsolete functions, variables, and faces have been removed:
1435 *** `last-input-char', `last-command-char', `unread-command-char'
1436 *** `facemenu-unlisted-faces'
1437 *** `rmail-decode-mime-charset'
1438 *** `iswitchb-read-buffer'
1439 *** `sc-version', `sc-submit-bug-report'
1440 *** `set-char-table-default'
1441 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1442 *** `compile-internal'
1444 *** `mode-line-inverse-video'
1445 *** `follow-mode-off-hook'
1446 *** `cvs-commit-buffer-require-final-newline'
1447 (use `log-edit-require-final-newline' instead)
1448 *** `cvs-changelog-full-paragraphs'
1449 (use `log-edit-changelog-full-paragraphs' instead)
1450 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1451 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1452 *** `vc-master-templates' (use `vc-handled-backends' instead)
1453 *** `vc-checkout-carefully'
1456 * Lisp Changes in Emacs 24.3
1458 ** CL-style generalized variables are now in core Elisp.
1459 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1460 You can define your own generalized variables using `gv-define-simple-setter',
1461 `gv-define-setter', etc.
1463 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1464 This can significantly speed up execution of non-byte-compiled code,
1465 but can also bump into previously unnoticed cyclic dependencies.
1466 These are generally harmless: they will simply cause the macro calls
1467 to be left for later expansion (as before), but will result in a
1468 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1469 You may wish to restructure your code so this does not happen.
1471 ** New sampling-based Elisp profiler.
1472 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1473 When finished, use M-x profiler-stop. The sampling rate can be based on
1474 CPU time or memory allocations.
1476 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1477 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1479 ** New macros `setq-local' and `defvar-local'.
1481 ** Face underlining can now use a wave.
1483 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1484 of `read-regexp' accepts a string ending with a colon and space, and its
1485 second argument DEFAULTS can be a list of strings accessible via `M-n'
1486 in the minibuffer ahead of other hard-coded useful regexp-related values.
1487 More commands use `read-regexp' now to read their regexp arguments.
1491 *** New function `completion-table-with-quoting' to handle completion
1492 in the presence of quoting, such as file completion in shell buffers.
1494 *** New function `completion-table-subvert' to use an existing completion
1495 table, but with a different prefix.
1499 *** New error type and new function `user-error'.
1500 These do not trigger the debugger.
1502 *** New option `debugger-bury-or-kill', saying what to do with the
1503 debugger buffer when exiting debug.
1505 *** Set `debug-on-message' to enter the debugger when a certain
1506 message is displayed in the echo area. This can be useful when trying
1507 to work out which code is doing something.
1509 *** New var `inhibit-debugger', automatically set to prevent accidental
1510 recursive invocations.
1514 *** New command `fit-frame-to-buffer' adjusts the frame height to
1517 *** The command `fit-window-to-buffer' can adjust the frame height
1518 if the new option `fit-frame-to-buffer' is non-nil.
1520 *** New macro `with-temp-buffer-window', similar to
1521 `with-output-to-temp-buffer'.
1523 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1526 *** New option `switch-to-buffer-preserve-window-point' to restore a
1527 window's point when switching buffers.
1529 *** New display action alist entries `window-height' and `window-width'
1530 specify the size of new windows created by `display-buffer'.
1532 *** New display action alist entry `pop-up-frame-parameters', if
1533 non-nil, specifies frame parameters to give any newly-created frame.
1535 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1536 tells display action functions to avoid changing which frame is
1539 *** New display action alist entry `previous-window', if non-nil,
1540 specifies window to reuse in `display-buffer-in-previous-window'.
1542 *** New display action functions `display-buffer-below-selected',
1543 and `display-buffer-in-previous-window'.
1545 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1546 now accept a third argument to avoid choosing the selected window.
1548 *** Additional values recognized for option `window-combination-limit'.
1550 *** The following variables are obsolete, as they can be replaced by
1551 appropriate entries in the `display-buffer-alist' function introduced
1553 **** `dired-shrink-to-fit'
1554 **** `display-buffer-reuse-frames'
1555 **** `display-buffer-function'
1556 **** `special-display-buffer-names'
1557 **** `special-display-frame-alist'
1558 **** `special-display-function'
1559 **** `special-display-regexps'
1563 *** `current-time-string' no longer requires that its argument's year
1564 must be in the range 1000..9999. It now works with any year supported
1565 by the underlying C implementation.
1567 *** `current-time' now returns extended-format time stamps
1568 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1569 PSEC is typically a multiple of 1000 on current machines. Other
1570 functions that use this format, such as `file-attributes' and
1571 `format-time-string', have been changed accordingly. Old-format time
1572 stamps are still accepted.
1574 *** The format of timers in `timer-list' and `timer-idle-list' is now
1575 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1576 The PSECS slot is new, and uses picosecond resolution. It can be
1577 accessed via the new `timer--psecs' accessor.
1579 *** Last-modified time stamps in undo lists now are of the form
1580 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1584 *** Improved security when handling persistent objects:
1586 **** `eieio-persistent-read' now features optional arguments for specifying
1587 the class to load, as well as a flag stating whether subclasses are allowed;
1588 if provided, other classes will be rejected by the reader. For
1589 compatibility with existing code, if the class is omitted only a
1592 **** New specialized reader for pulling in classes and signaling errors
1593 without evaluation of suspicious code.
1595 **** All slots that contain objects must have a :type. Slots with lists
1596 of objects must use a new type predicate for a list of an object type.
1598 *** Support for `find-function' and similar utilities, through the addition
1599 of filename support to generated symbols.
1601 ** Floating point functions now always return special values like NaN,
1602 instead of signaling errors, if given invalid args; e.g., (log -1.0).
1603 Previously, they returned NaNs on some platforms but signaled errors
1604 on others. The affected functions are acos, asin, tan, exp, expt,
1605 log, log10, sqrt, and mod.
1607 ** New fringe bitmap `exclamation-mark'.
1609 ** Miscellaneous changes to special forms and macros
1611 *** `defun' and `defmacro' are now macros rather than special forms.
1613 *** `kbd' is now a function rather than a macro.
1615 ** Miscellaneous new functions
1617 *** `set-temporary-overlay-map' sets up a temporary keymap that
1618 takes precedence over most other maps for a short while (normally one key).
1620 *** `autoloadp' tests if its argument is an autoloaded object.
1622 *** `autoload-do-load' performs the autoloading operation.
1624 *** `buffer-narrowed-p' tests if the buffer is narrowed.
1626 *** `file-name-base' returns a file name sans directory and extension.
1628 *** `function-get' fetches a function property, following aliases.
1630 *** `posnp' tests if an object is a `posn'.
1632 *** `system-users' returns the user names on the system.
1634 *** `system-groups' returns the group names on the system.
1636 *** `tty-top-frame' returns the topmost frame of a text terminal.
1638 ** The following functions and variables are obsolete:
1639 *** `automount-dir-prefix' (use `directory-abbrev-alist')
1640 *** `buffer-has-markers-at'
1641 *** `macro-declaration-function' (use `macro-declarations-alist')
1642 *** `window-system-version' (provides no useful information)
1643 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
1644 *** `query-replace-interactive'
1645 *** `font-list-limit' (has had no effect since Emacs < 23)
1648 * Changes in Emacs 24.3 on Non-Free Operating Systems
1650 ** Cygwin builds can use the native MS Windows user interface.
1651 Pass `--with-w32' to configure. The default remains the X11 interface.
1653 ** Two new functions are available in Cygwin builds:
1654 `cygwin-convert-file-name-from-windows' and
1655 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
1656 code to access the Cygwin file-name mapping machinery to convert
1657 between Cygwin and Windows-native file and directory names.
1659 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
1660 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
1661 `mouse-autoselect-window'.
1663 ** On MS Windows Vista and later Emacs now supports symbolic links.
1665 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
1666 support for libxml2, even if its presence is detected.
1668 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1670 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
1671 directories to the search path. You must add them yourself if you want them.
1674 * Changes in Emacs 24.2
1676 ** This is mainly a bug-fix release.
1679 * Installation Changes in Emacs 24.1
1681 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1682 to configure. Note that other libraries used by Emacs, RSVG and GConf,
1683 also depend on Gtk+. You can disable them with --without-rsvg and
1686 ** Emacs can be compiled with GnuTLS support.
1687 This happens by default if a suitably recent version of the library is
1688 found at build time. To prevent this, use the configure option
1689 `--without-gnutls'. See below for GnuTLS features.
1691 ** Emacs can be compiled with SELinux support.
1692 This happens by default if a suitably recent version of the library is
1693 found at build time. To prevent this, use the configure option
1694 `--without-selinux'. See below for SELinux features.
1696 ** Emacs can be compiled with ImageMagick support.
1697 This happens by default if a suitably recent version of the library is
1698 found at build time. To prevent this, use the configure option
1699 `--without-imagemagick'. See below for ImageMagick features.
1700 This feature is not available for the Nextstep or MS ports.
1702 ** Emacs can be compiled with libxml2 support.
1703 This happens by default if a suitably recent version of the library is
1704 found at build time. To prevent this, use the configure option
1705 `--without-xml2'. See below for libxml2 features.
1707 ** By default, the installed Info and man pages are compressed.
1708 You can disable this by configuring --without-compress-info.
1710 ** New configure option --with-wide-int.
1711 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
1712 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1715 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
1716 These provide no new functionality, they just remove the need to edit
1717 lib-src/Makefile by hand in order to use the associated features.
1719 ** New configure option --enable-use-lisp-union-type.
1720 This is only useful for Emacs developers to debug certain types of bugs.
1721 This is not a new feature; only the configure flag is new.
1723 ** The standalone programs digest-doc and sorted-doc are removed.
1724 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1726 ** The standalone program `fakemail' is removed.
1727 If you need it, feedmail.el provides a superset of the functionality.
1730 * Startup Changes in Emacs 24.1
1732 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
1733 command line arguments, and the EMACS_UNIBYTE environment variable, no
1734 longer have any effect. (They were declared obsolete in Emacs 23.)
1736 ** New command line option `--no-site-lisp' removes site-lisp directories
1737 from load-path. -Q now implies this. This option does not affect the
1738 EMACSLOADPATH environment variable (and hence has no effect for
1742 * Changes in Emacs 24.1
1746 *** Many packages now use the `completion-at-point' command,
1747 rather than implementing separate completion commands.
1749 *** `completion-at-point' now handles tags and semantic completion.
1751 *** Completion in a non-minibuffer now tries to detect the end of completion
1752 and pops down the *Completions* buffer accordingly.
1754 *** New option `completion-cycle-threshold' allows completion cycling.
1756 *** New option `completion-category-overrides' for overriding the
1757 default completion style in certain circumstances.
1759 *** New completion style `substring'.
1761 *** Completion of buffer names uses `substring' completion by default.
1763 *** The option `widget-complete-field' has been removed.
1767 *** The first time you try sending mail, Emacs asks for a mail method.
1768 This is implemented by a new default for `send-mail-function', which
1769 is `sendmail-query-once'. This offers to use the smtpmail package, or
1770 to use the old defaults relying on external mail facilities
1771 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1772 `mailclient-send-it' on Windows).
1774 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1775 transfers the report to your desktop's preferred mail client, if there
1776 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1779 *** See Changes in Specialized Modes and Packages for SMTPmail changes
1780 and Mail mode changes
1782 ** Emacs server and client changes
1784 *** New option `server-port' specifies the port for TCP Emacs servers.
1786 *** New emacsclient argument -q/--quiet suppresses some status messages.
1788 *** New emacsclient argument --frame-parameters specifies the frame
1789 parameters of any newly-created graphical frame.
1791 *** If emacsclient shuts down due to Emacs signaling an error,
1792 its exit status is 1.
1794 *** New emacsclient argument --parent-id ID.
1795 This opens a client frame in parent X window ID, via XEmbed, similar
1796 to the --parent-id argument to Emacs.
1798 ** Internationalization changes
1800 *** Emacs now supports display and editing of bidirectional text.
1801 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1802 displayed in the correct visual order as expected by users of those
1803 scripts. The display reordering is a "full bidirectionality" class
1804 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1805 with no RTL text should look exactly the same as before.
1807 **** New buffer-local variable `bidi-display-reordering'.
1808 To disable display reordering in a buffer, change this to nil.
1810 **** New buffer-local variable `bidi-paragraph-direction'.
1811 If nil (the default), Emacs determines the base direction of each
1812 paragraph from its text, as specified by the UBA. Setting the value
1813 to `right-to-left' or `left-to-right' forces a base direction on each
1816 Paragraphs with right-to-left base direction are displayed starting at
1817 the right window edge.
1819 *** Enhanced support for characters with no glyphs in available fonts,
1820 or, on text terminals, characters that cannot be encoded by the
1821 terminal coding system. The new option `glyphless-char-display-control'
1822 specifies how to display them: as a hexadecimal code in a box, a thin
1823 1-pixel space, an empty box, etc.
1825 *** New input methods for Farsi and Bulgarian
1826 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
1828 *** `nobreak-char-display' now also highlights Unicode hyphen chars
1829 (U+2010 and U+2011).
1831 *** New Hebrew translation of the Emacs Tutorial.
1832 Type `C-u C-h t' to choose it in case your language setup doesn't
1833 automatically select it.
1835 ** An Emacs Lisp package manager is now included.
1836 This is a convenient way to download and install additional packages,
1837 from a package repository at http://elpa.gnu.org.
1839 *** M-x list-packages shows a list of packages, which can be
1840 selected for installation.
1842 *** New command `describe-package', bound to `C-h P'.
1844 *** By default, all installed packages are loaded automatically when
1845 Emacs starts up. To disable this, set `package-enable-at-startup' to
1846 nil. To specify the packages to load, customize `package-load-list'.
1848 ** Custom theme changes
1850 *** New command `M-x customize-themes', which provides a convenient
1851 interface for enabling and disabling Custom themes.
1853 *** New option `custom-theme-load-path' is the load path for themes.
1854 Emacs no longer looks for Custom themes in `load-path'. The default
1855 value of `custom-theme-load-path' says to look for themes in
1856 `custom-theme-directory', followed by a subdirectory of
1857 `data-directory' named "themes/", which contains a small selection of
1858 built-in Custom themes.
1860 *** New option `custom-safe-themes' records known-safe theme files.
1861 If a theme is not in this list, Emacs queries before loading it, and
1862 offers to save the theme to `custom-safe-themes' automatically. By
1863 default, all themes included in Emacs are treated as safe.
1865 ** Improved GTK integration
1867 *** GTK scroll-bars are now placed on the right by default.
1868 The function `set-scroll-bar-mode' can change this.
1870 *** GTK tool bars can have just text, just images or images and text.
1871 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1872 the default is taken from desktop settings.
1874 *** GTK tool bars can be placed on any edge of the frame.
1875 The frame-parameter tool-bar-position controls this. It takes the
1876 values top, left, right or bottom. The Options => Show/Hide menu has
1879 *** The default colors for selected text (the `region' face) are taken
1880 from the GTK theme when Emacs is built with GTK.
1882 *** Emacs uses GTK tooltips by default if built with GTK.
1883 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
1885 ** Graphical interface changes
1887 *** On graphical displays, the mode-line no longer ends in dashes.
1888 Also, the first dash (which does not indicate anything) is just
1889 displayed as a space.
1891 *** `menu-bar-select-buffer-function' lets you choose another operation
1892 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1894 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
1895 built with Xft. These fonts can be set via X resources, for example:
1896 Emacs.pane.menubar.font: Courier-12
1900 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
1901 or if it receives a SIGINT signal in batch mode.
1903 *** `kill-emacs-hook' is now also run in batch mode.
1904 Third-party code which adds to `kill-emacs-hook' should check if they
1905 do the right thing in batch mode.
1907 ** Scrolling changes
1909 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
1910 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
1911 of buffer at first key-press (instead they move to top/bottom of buffer)
1912 when `scroll-error-top-bottom' is non-nil.
1914 *** New option `scroll-error-top-bottom' (see above).
1916 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
1917 scroll a line instead of full screen.
1919 *** New property `scroll-command' should be set on a command's symbol to
1920 define it as a scroll command affected by `scroll-preserve-screen-position'.
1922 *** If you customize `scroll-conservatively' to a value greater than 100,
1923 Emacs will never recenter point in the window when it scrolls due to
1924 cursor motion commands or commands that move point (e.f., `M-g M-g').
1925 Previously, you needed to use `most-positive-fixnum' as the value of
1926 `scroll-conservatively' to achieve the same effect.
1928 *** "Aggressive" scrolling now honors the scroll margins.
1929 If you customize `scroll-up-aggressively' or
1930 `scroll-down-aggressively' and move point off the window, Emacs now
1931 scrolls the window so as to avoid positioning point inside the scroll
1934 ** Basic SELinux support has been added.
1935 This requires Emacs to be linked with libselinux at build time.
1937 *** Emacs preserves the SELinux file context when backing up.
1938 Also, the function `copy-file' has an extra optional argument for
1939 preserving SELinux context, and the return value of `backup-buffer'
1940 now includes the SELinux context.
1942 *** New functions `file-selinux-context' and `set-file-selinux-context'
1943 get and set the SELinux context of a file.
1947 *** `delete-by-moving-to-trash' now only affects commands that specify
1948 trashing. This avoids inadvertently trashing temporary files.
1950 *** Calling `delete-file' or `delete-directory' with a prefix argument
1951 now forces true deletion, regardless of `delete-by-moving-to-trash'.
1953 ** File- and directory-local variable changes
1955 *** You can stop directory local vars from applying to subdirectories.
1956 Add an element (subdirs . nil) to the alist portion of any variables
1957 settings to indicate that the section should not apply to
1960 *** Directory local variables can apply to some file-less buffers.
1961 Affected modes include dired, vc-dir, and log-edit. For example,
1962 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1963 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1964 `hack-dir-local-variables-non-file-buffer' to support this.
1966 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1967 Instead, use "eval: (minor-mode 1)".
1969 *** The variable `inhibit-first-line-modes-regexps' has been renamed
1970 to `inhibit-local-variables-regexps'. As the name suggests, it now
1971 applies to ALL file local variables, not just -*- lines. The
1972 associated `inhibit-first-line-modes-suffixes' has been renamed in the
1977 *** The `quit-window' command now restores the last buffer displayed
1978 in the quitted window.
1980 *** Resizing an Emacs frame now preserves proportional window sizes,
1981 modulo restrictions like window minimum sizes and fixed-size windows.
1983 *** The behavior of `display-buffer' is now customizable in detail.
1985 **** New option `display-buffer-base-action' specifies a list of
1986 user-determined display "actions" (functions and optional arguments
1987 for choosing the displaying window).
1989 This takes precedence over the default display action, which is
1990 specified by `display-buffer-fallback-action'.
1992 **** New option `display-buffer-alist' maps buffer name regexps to
1993 display actions, taking precedence over `display-buffer-base-action'.
1995 *** New option `window-combination-limit'.
1996 The new option `window-combination-limit' allows to return the space
1997 obtained for resizing or creating a window more reliably to the window
1998 from which such space was obtained.
2000 *** New option `window-combination-resize'.
2001 The new option `window-combination-resize' allows to split a window that
2002 otherwise cannot be split because it's too small by stealing space from
2003 other windows in the same combination. Subsequent resizing or deletion
2004 of the window will resize all windows in the same combination as well.
2006 *** New option `frame-auto-hide-function' lets you choose between
2007 iconifying or deleting a frame when burying a buffer in a dedicated
2008 frame, or quitting a window showing a buffer in a frame of its own.
2010 *** New commands `maximize-window' and `minimize-window'.
2011 These maximize and minimize the size of a window within its frame.
2013 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2014 These functions allow to navigate through the live buffers that have
2015 been shown in a specific window.
2017 ** Minibuffer changes
2019 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2020 This is handy for minibuffer-only frames, and is also used for the feature
2021 where mouse-1 pops up *Messages*"', which can now easily be changed.
2023 *** Minibuffers set `truncate-lines' to nil.
2024 If you want to change the value to something else, you could use
2025 for example `minibuffer-setup-hook'.
2027 ** `auto-mode-case-fold' is now enabled by default.
2029 ** `backup-by-copying-when-mismatch' now defaults to t.
2031 ** New basic faces `error', `warning', `success'.
2032 These are used to highlight text indicating failure, caution or
2033 successful operation.
2035 ** New option `list-colors-sort' defines the color sort order
2036 for `list-colors-display'.
2038 ** The variable `focus-follows-mouse' now always defaults to nil.
2041 * Editing Changes in Emacs 24.1
2045 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2046 `isearch-yank-line'.
2048 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2049 `isearch-yank-kill'.
2051 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2053 ** New commands `count-words-region' and `count-words'.
2055 *** M-= is bound to `count-words-region', not `count-lines-region'.
2056 The `count-words-region' command, when called interactively, reports
2057 the number of lines, words, and characters in the region. It is a
2058 superset of the old `count-lines-region', which is now an obsolete
2061 ** The command `just-one-space' (M-SPC), if given a negative argument,
2062 also deletes newlines around point.
2066 *** New option `delete-active-region'.
2067 If non-nil, [delete] and DEL delete the region if it is active and no
2068 prefix argument is given. If set to `kill', those commands kill
2071 *** New command `delete-forward-char', bound to [delete].
2072 This is meant for interactive use, and obeys `delete-active-region'.
2073 The command `delete-char' does not obey `delete-active-region'.
2075 *** `delete-backward-char' is now a Lisp function.
2076 Apart from obeying `delete-active-region', its behavior is unchanged.
2077 However, the byte compiler now warns if it is called from Lisp; Lisp
2078 callers should use delete-char with a negative argument instead.
2080 *** The option `mouse-region-delete-keys' has been deleted.
2082 ** Selection changes.
2084 The default handling of clipboard and primary selections has been
2085 changed to conform with modern X applications. In short, most
2086 commands for killing and yanking text now use the clipboard, while
2087 mouse commands use the primary selection.
2089 In the following, we provide a list of these changes, followed by a
2090 list of steps to get the old behavior back if you prefer that.
2092 *** `select-active-regions' now defaults to t.
2093 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2094 the kill ring. The selected text is put in the primary selection, if
2095 the system possesses a separate primary selection facility (e.g. X).
2097 **** `select-active-regions' also accepts a new value, `only'.
2098 This means to only set the primary selection for temporarily active
2099 regions (usually made by mouse-dragging or shift-selection);
2100 "ordinary" active regions, such as those made with C-SPC followed by
2101 point motion, do not alter the primary selection.
2103 **** `mouse-drag-copy-region' now defaults to nil.
2105 *** mouse-2 is now bound to `mouse-yank-primary'.
2106 This pastes from the primary selection, ignoring the kill-ring.
2107 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2109 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2111 *** `x-select-enable-primary' now defaults to nil.
2112 Thus, commands that kill text or copy it to the kill-ring (such as
2113 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2115 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2116 exactly equivalent to M-w, C-w, and C-y respectively.
2118 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2119 non-nil by default, as Windows does not support the primary selection
2120 between applications.
2122 *** To return to the previous behavior, do the following:
2124 **** Change `select-active-regions' to nil.
2125 **** Change `mouse-drag-copy-region' to t.
2126 **** Change `x-select-enable-primary' to t (on X only).
2127 **** Change `x-select-enable-clipboard' to nil.
2128 **** Bind `mouse-yank-at-click' to mouse-2.
2130 *** Support for X cut buffers has been removed.
2132 *** X clipboard managers are now supported.
2133 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2135 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2136 in the current rectangle. With a prefix argument, this prompts for a
2137 number to count from and for a format string.
2139 ** `redisplay-dont-pause' now defaults to t.
2140 This makes Emacs feel more responsive to editing commands that arrive
2141 at high rate, e.g. if you lean on some key, because stopping redisplay
2142 in the middle (when this variable is nil) forces more expensive
2143 updates later on, and Emacs appears to be unable to keep up.
2145 ** The behavior of <TAB> for active regions in Text mode has changed.
2146 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2147 when the region is active causes Emacs to indent all the lines in the
2148 region, aligning them with the line previous to the first line in the
2149 region (or with the left margin if there is no previous line).
2151 ** When `occur' is called with a prefix argument, matching strings are
2152 collected into the `*Occur*' buffer without line numbers. If there
2153 are parenthesized subexpressions in the specified regexp, `occur'
2154 reads replacement text that may contain \\& and \\N whose convention
2155 follows `replace-match'.
2158 * Changes in Specialized Modes and Packages in Emacs 24.1
2160 ** Archive Mode has basic support for browsing and updating 7z archives.
2164 *** BibTeX mode now supports biblatex.
2165 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2166 `bibtex-entry-field-alist' is now an obsolete alias for
2167 `bibtex-BibTeX-entry-alist'.
2169 *** New command `bibtex-search-entries', bound to C-c C-a.
2171 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2173 *** New variable `bibtex-search-entry-globally'.
2177 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2179 *** The default browser used by the package is now the "xdg-open" program,
2180 on platforms that support it. This calls your desktop's preferred browser.
2184 *** Support for musical notes.
2186 *** Support for logarithmic units.
2188 *** No longer uses the tex prefix for TeX specific unit names when
2189 using TeX or LaTeX mode.
2191 *** New option to highlight selections using faces.
2193 *** `calc-histogram' has the option of using a vector to determine the bins.
2195 *** New "O" option prefix.
2197 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2199 ** Calendar, Diary, and Appt
2201 *** Diary entries can contain non-printing "comments".
2202 See the variable `diary-comment-start'.
2204 *** Appointments can specify their individual warning times.
2205 See the variable `appt-warning-time-regexp'.
2207 *** The function specified by `appt-disp-window-function' may be passed
2208 lists of arguments if multiple appointments are due at similar times.
2209 If you are using a custom function for this, you should update it.
2211 *** New function `diary-hebrew-birthday'.
2213 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2214 may no longer be nil, but must all be strings.
2216 *** The obsolete (since Emacs 22.1) method of enabling the appt
2217 package by adding `appt-make-list' to `diary-hook' has been removed.
2218 Use `appt-activate' instead.
2220 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2221 appt-issue-message (use the function appt-activate)
2222 appt-visible/appt-msg-window (use the variable appt-display-format)
2224 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2225 view-diary-entries, list-diary-entries, show-all-diary-entries
2229 *** New feature to "guess" the style in an existing buffer.
2230 The main entry point is M-x c-guess.
2232 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2234 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2235 Thus C-M-a will, by default, go to the beginning of the immediate function,
2238 *** "Macros with semicolons" can be registered for correct indentation.
2239 Where such a macro ends a line (no semicolon) the next statement is no longer
2240 parsed as a statement continuation.
2242 ** Comint and modes derived from it use the standard completion code.
2246 *** Compilation mode can be used without Font Lock mode.
2247 `compilation-parse-errors-function' is now obsolete.
2249 *** New variable `compilation-filter-start', which is bound while
2250 `compilation-filter-hook' runs. It records the start position of the
2251 text inserted by `compilation-filter'.
2253 *** `compilation-error-screen-columns' and `compilation-first-column'
2254 are obeyed in the editing buffer. So programming language modes can
2255 set them, whereas previously only the value in the *Compilation*
2260 *** Customize buffers now contain a search field.
2261 The search is performed using `customize-apropos'.
2262 To turn off the search field, set `custom-search-field' to nil.
2264 *** Options in customize group buffers start out hidden if not customized.
2265 Use the arrow to the left of the option name to toggle visibility.
2267 *** custom-buffer-sort-alphabetically now defaults to t.
2269 *** The color widget now has a "Choose" button, which allows you to
2270 choose a color via `list-colors-display'.
2274 *** It is now possible to access buses other than the default system
2277 *** The `dbus-register-method' and `dbus-register-property' functions
2278 optionally do not register names.
2280 *** The new function `dbus-register-service' registers a known service
2281 name on a D-Bus without also registering a property or a method.
2285 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2286 if called with a prefix argument, read a file name from the minibuffer
2287 instead of using the current buffer.
2289 *** The "dired local variables" feature of Dired-x is obsolete.
2290 The standard directory local variables feature replaces it.
2294 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2295 controlling attempts to autojoin a channel.
2297 *** New variable `erc-coding-system-precedence': If we use `undecided'
2298 as the server coding system, this variable will then be consulted.
2299 The default is to decode strings that can be decoded as utf-8 as
2300 utf-8, and do the normal `undecided' decoding for the rest.
2304 *** The default value of `eshell-directory-name' has changed
2305 to be an "eshell" directory in `user-emacs-directory'.
2306 The old "~/.eshell/" directory is still used if it exists, though.
2310 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2311 It now supports multithread non-stop debugging and simultaneous
2312 debugging of several threads.
2316 *** RET (`image-toggle-animation') toggles animation, if applicable.
2317 Animation plays once, unless the option `image-animate-loop' is non-nil.
2321 *** New command M-x info-display-manual displays a named Info manual.
2322 If that manual is already visited in some Info buffer, it displays
2323 that buffer. (This is handy if you have many manuals in many *info*
2324 buffers, and don't remember the name of the buffer visiting the manual
2325 you want to consult.) Otherwise, it loads and displays the manual.
2327 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2328 This is for compatibility with the stand-alone Info reader program,
2329 and also because `Info-edit' is a rarely used command that is disabled
2332 ** Mail mode changes (not Message mode)
2334 *** New command M-x mail-add-attachment for adding MIME attachments
2336 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2337 (Its name is misleading, since it has nothing to do with MIME
2338 attachments.) The old name is now an obsolete alias to the new name.
2340 ** MH-E has been updated to MH-E version 8.3.1.
2341 See MH-E-NEWS for details.
2343 ** Modula-2 mode provides auto-indentation.
2345 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2347 ** nXML mode no longer binds C-RET to `nxml-complete'.
2348 Completion is now performed via `completion-at-point', bound to C-M-i
2349 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2350 default), this performs tag completion.
2352 ** Org mode has been updated to version 7.8.09.
2353 See ORG-NEWS for details.
2355 ** Prolog mode has been completely revamped, with lots of additional
2356 functionality such as more intelligent indentation, electricity,
2357 support for more variants, including Mercury, and a lot more.
2361 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2362 in the Rmail incoming message.
2364 *** The variable `rmail-message-filter' no longer has any effect.
2365 This change was made in Emacs 23.1 but was not advertised at the time.
2366 Try using `rmail-show-message-hook' instead.
2370 *** M-x shell prompts for the shell path name if the default directory
2371 is a remote file name and neither the environment variable $ESHELL nor
2372 the variable `explicit-shell-file-name' is set.
2374 *** TAB is now bound to the standard `completion-at-point' command,
2375 which now implements the pcomplete rules for shell command completion.
2379 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2380 if the mail server supports them. This uses either built-in GnuTLS
2381 support, or the starttls.el library. Customize `smtpmail-stream-type'
2384 *** The variable `smtpmail-auth-credentials' has been removed.
2385 By default, the information is now stored in the file ~/.authinfo.
2386 This was the default value of smtpmail-auth-credentials. If you had
2387 customized smtpmail-auth-credentials to a list of user names and
2388 passwords, those settings are not used. During your first connection
2389 to the smtp server, Emacs will prompt for the user name and password,
2390 and offer to save them to ~/.authinfo. Or you can manually copy the
2391 credentials to ~/.authinfo. For example, if you had
2393 (setq smtpmail-auth-credentials
2394 '(("mail.example.org" 25 "jim" "s!cret")))
2396 then the equivalent line in ~/.authinfo would be
2398 machine mail.example.org port 25 login jim password s!cret
2400 See the auth-source manual for more information, e.g. on encrypting
2401 the credentials file.
2403 *** The variable `smtpmail-starttls-credentials' has been removed.
2404 If you had that set, you need to put
2406 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2408 in your ~/.authinfo file instead.
2410 *** SMTPmail defaults to using the address in the From: header as the
2411 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2412 to the address you wish to use instead.
2416 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2417 and `sql-oracle-scan-on'.
2419 *** New options controlling prompting for login parameters.
2420 Each supported product has a custom variable `sql-*-login-params',
2421 which is a list of the parameters to be prompted for before a
2422 connection is established.
2424 *** The command `sql-product-interactive' now takes a prefix argument,
2425 which causes it to prompt for an SQL product.
2427 *** Product-specific SQL interactive commands now take prefix arguments.
2428 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2429 given a prefix argument, prompt for a name for the SQL interactive
2430 buffer. This reduces the need for calling `sql-rename-buffer'.
2432 *** SQL interactive modes suppress command continuation prompts, and
2433 replace tabs with spaces. The first change impacts multiple line SQL
2434 statements entered with C-j between each line, statements yanked into
2435 the buffer and statements sent with `sql-send-*' functions. The
2436 second prevents the MySQL and Postgres interpreters from listing
2437 object name completions when sent text via `sql-send-*' functions.
2439 *** New command `sql-connect' starts a predefined SQLi session,
2440 using the login parameters from `sql-connection-alist'.
2442 *** New "Save Connection" menu item in SQLi buffers.
2443 This gathers the login params specified for the SQLi session, if it
2444 was not started by a connection, and saves them as a new connection.
2446 *** New commands for listing database objects and details:
2447 sql-list-all and sql-list-table.
2449 *** An API for manipulating SQL product definitions has been added.
2453 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2457 *** New inline access method "ksu" (kerberized su).
2459 *** The following access methods are discontinued: "ssh1_old",
2460 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2462 *** The user option `remote-file-name-inhibit-cache' controls whether
2463 remote file attributes are cached for better performance.
2465 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2466 default value to "".
2468 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2469 for remote machines which support SELinux.
2471 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2472 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2473 the degree of parallelism.
2475 ** VC and related modes
2477 *** Support for pulling on distributed version control systems.
2478 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2479 supported (currently with Bzr, Git, and Mercurial), to update the
2480 current branch and working tree. A prefix argument means to prompt
2481 the user for specifics, e.g. a pull location.
2483 *** `vc-update' is now an alias for `vc-pull'.
2485 *** Support for merging on distributed version control systems.
2486 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2487 is supported (currently with Bzr, Git, and Mercurial), to merge
2488 changes from another branch into the current one. It prompts for
2489 specifics, e.g. a merge source.
2491 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2492 shows a diff while querying the user. It defaults to t.
2494 *** Log entries in some Log View buffers can be toggled to display a
2495 longer description by typing RET (log-view-toggle-entry-display).
2496 This is currently supported for Bzr, Git, and Mercurial (to support
2497 another backend, define a `log-view-expanded-log-entry-function').
2498 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2499 use this to display the full log entry for the revision at point.
2501 *** New command `vc-ediff' allows visual comparison of two revisions
2502 of a file similar to `vc-diff', but using ediff backend.
2504 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2505 this was not advertised at the time.
2507 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2508 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2509 this was not advertised at the time.
2515 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2517 *** partial-completion-mode (complete.el) is obsolete.
2518 You can get a comparable behavior with:
2519 (setq completion-styles '(partial-completion initials))
2520 (setq completion-pcm-complete-word-inserts-delimiters t)
2522 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2524 *** pgg is obsolete (use EasyPG instead).
2526 *** sregex.el is obsolete, since rx.el is a strict superset.
2528 *** s-region.el and pc-select.el are obsolete.
2529 They are superseded by shift-select-mode, enabled by default since 23.1.
2531 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2535 *** The Landmark game is now invoked with `landmark', not `lm'.
2536 Its functions and variables have been similarly renamed.
2538 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2539 (This interfered with cua-mode.)
2541 *** f90.el has some support for Fortran 2008 syntax.
2543 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2545 *** New command `nato-region' converts text to NATO phonetic alphabet.
2548 * New Modes and Packages in Emacs 24.1
2550 ** Occur Edit mode applies edits made in *Occur* buffers to the
2551 original buffers. It is bound to "e" in Occur mode.
2553 ** New global minor mode electric-pair-mode.
2554 When enabled, typing an open parenthesis automatically inserts the
2555 matching closing one.
2557 ** New global minor mode electric-indent-mode.
2558 When enabled, typing certain characters triggers reindentation.
2559 Major modes wishing to use this can set electric-indent-chars or
2560 electric-indent-functions.
2562 ** New global minor mode electric-layout-mode.
2563 When enabled, typing certain characters automatically inserts newlines.
2564 Major modes wishing to use this can set electric-layout-rules.
2566 ** tabulated-list.el provides a generic major mode for tabulated data,
2567 from which other modes can be derived.
2569 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2571 ** secrets.el is an implementation of the Secret Service API, an
2572 interface to password managers like GNOME Keyring or KDE Wallet. The
2573 Secret Service API requires D-Bus for communication. The command
2574 `secrets-show-secrets' offers a buffer with a visualization of the
2577 ** notifications.el provides an implementation of the Desktop
2578 Notifications API. It requires D-Bus for communication.
2580 ** soap-client.el supports access to SOAP web services from Emacs.
2581 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2583 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
2585 ** New emacs-lock.el package.
2586 The previous version has been moved to obsolete/old-emacs-lock.el.
2587 Now, there is a proper minor mode `emacs-lock-mode'. Protection
2588 against exiting Emacs and killing the buffer can be set separately.
2589 The mechanism for automatically turning off protection for buffers
2590 with dead inferior processes has been generalized.
2593 * Incompatible Lisp Changes in Emacs 24.1
2595 ** Passing a nil argument to a minor mode function call now ENABLES
2596 the minor mode unconditionally. This is so that you can write e.g.
2598 (add-hook 'text-mode-hook 'foo-mode)
2600 to enable foo-mode in Text mode buffers, removing the need for
2601 `turn-on-foo-mode' style functions. This affects all mode commands
2602 defined by `define-minor-mode'. If called interactively, the mode
2603 command still toggles the minor mode.
2605 ** The return value of `backup-buffer' has changed.
2606 It is now a list of three elements, where the second element is a list
2607 describing the original file's SELinux context. If Emacs or the
2608 system lacks SELinux support, the context list is (nil nil nil nil).
2609 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
2611 ** `char-direction-table' and the `char-direction' function were deleted.
2612 They were buggy and inferior to the new support of bidirectional
2613 editing introduced in Emacs 24. If you need the bidirectional
2614 properties of a character, use `get-char-code-property' with the last
2615 argument `bidi-class'.
2617 ** `copy-directory' now copies the source directory as a subdirectory
2618 of the target directory, if the latter is an existing directory. The
2619 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2620 the contents directly into a pre-existing target directory.
2622 ** For mouse click input events in the text area, the Y pixel
2623 coordinate in the POSITION list now counts from the top of the text
2624 area, excluding any header line. Previously, it counted from the top
2627 ** Support for "old-style" backquotes, obsolete for 10+ years, has
2628 been further reduced. Now a backquote not followed by a space is
2629 always treated as a "new-style" backquote. Please remove all
2630 "old-style" backquotes from your code. If your code uses backquotes
2631 as documented in the Elisp manual, and compiles without warning, then
2632 you have nothing to do in this regard. Code not following the
2633 appropriate conventions may fail to compile.
2635 The most common cause of trouble seems to be an old-style backquote
2636 followed by a newline. Another cause of trouble is vector notation
2637 for key sequence notation: instead of [(control ,)] and [(control ')],
2638 you should write [(control ?,)] and [(control ?')], which will work in
2641 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2642 was not advertised at the time. The function `custom-initialize-delay'
2643 replaced all known uses.
2645 ** `view-buffer' now treats special mode-class in the same way that
2646 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2647 major mode is special).
2649 ** Menu and tool bar changes
2651 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
2652 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2653 With these alist entries omitted, `make-frame' checks the value of the
2654 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2655 a menu-bar or tool-bar, respectively. If the alist entries are added,
2656 they override the value of `menu-bar-mode'/`tool-bar-mode'.
2658 *** The menu bar bindings's caches are not used any more.
2659 Use (where-is-internal <def> nil t) instead.
2661 ** Regions created by mouse dragging are now normal active regions,
2662 similar to those created by shift-selection (see Selection changes
2663 above). In previous Emacs versions, these regions were delineated by
2664 `mouse-drag-overlay'; that variable has been removed.
2666 ** The fourth argument of `filter-buffer-substring' has been removed.
2667 If you want to remove text properties from the final result, simply
2668 pass the result through substring-no-properties.
2670 ** cl.el no longer provides `cl-19'.
2672 ** The following obsolete functions and aliases have been removed
2673 (the appropriate new function is given in parentheses; "not needed"
2674 means you can just remove all calls to the function in question):
2676 *** `comint-kill-output' (`comint-delete-output')
2677 *** `decompose-composite-char' (`char-to-string')
2678 *** `outline-visible' (`outline-invisible-p')
2679 *** `internal-find-face' (`facep')
2680 *** `internal-get-face' (`facep and check-face')
2681 *** `frame-update-faces' (not needed)
2682 *** `frame-update-face-colors' (`frame-set-background-mode')
2683 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2684 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
2685 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2686 *** `x-make-font-bold-italic' (`make-face-bold-italic')
2687 *** `x-make-font-unbold' (`make-face-unbold')
2688 *** `x-make-font-unitalic' (`make-face-unitalic')
2689 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2690 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2691 *** `iswitchb-default-keybindings' (`iswitchb-mode')
2692 *** `char-bytes' (== 1)
2693 *** `isearch-return-char' (`isearch-printing-char')
2694 *** `make-local-hook' (not needed)
2695 *** `set-screen-height' (`set-frame-height')
2696 *** `set-screen-width' (`set-frame-width')
2698 ** The following obsolete variables and varaliases have been removed
2699 (the appropriate new variable is given in parentheses):
2701 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2702 *** `vc-header-alist' (`vc-BACKEND-header')
2703 *** `directory-sep-char' (== ?/)
2704 *** `font-lock-defaults-alist' (`font-lock-defaults')
2705 *** `e' (`float-e').
2707 ** The following obsolete files were removed:
2708 sc.el, x-menu.el, rnews.el, rnewspost.el
2710 ** The format of the finder-inf.el file has changed, since the Finder
2711 mechanism is now based on the package system. The variable
2712 `finder-package-info' is replaced by `package--builtins' and
2713 `finder-keywords-hash'.
2715 ** When generating autoloads, `update-directory-autoloads' no longer
2716 assumes every inspected file is in your `load-path'. It instead
2717 generates relative names according to the current `load-path'.
2720 * Lisp Changes in Emacs 24.1
2722 ** Code can now use lexical scoping by default instead of dynamic scoping.
2723 The `lexical-binding' variable enables lexical scoping for local
2724 variables. It is typically set via a file-local variable in the first
2725 line of the file, in which case it applies to all the code in that
2728 *** `eval' takes a new optional argument `lexical' to choose the new lexical
2729 binding instead of the old dynamic binding mode.
2731 *** Lexically scoped interpreted functions are represented with a new form
2732 of function value which looks like (closure ENV ARGS &rest BODY).
2734 *** New macro `letrec' to define recursive local functions.
2736 *** `defvar' and `defconst' now mark the variable as special (dynamic).
2737 So do `defcustom' and other forms that call `defvar' as a subroutine.
2739 *** New function `special-variable-p' to check whether a variable is
2740 declared as dynamically bound.
2742 *** The form ((lambda ...) ...) is deprecated.
2744 ** An Emacs Lisp testing tool is now included.
2745 Emacs Lisp developers can use this tool to write automated tests for
2746 their code. See the ERT info manual for details.
2748 ** Changes for bidirectional display and editing
2750 *** New function `current-bidi-paragraph-direction'.
2751 This returns the base direction of the paragraph at point.
2753 *** New function `bidi-string-mark-left-to-right'.
2754 Given a string containing characters from right-to-left scripts, this
2755 function returns another string which can be safely inserted into a
2756 buffer, such that any following text will be always displayed to the
2757 right of that string. (This works by appending an invisible Unicode
2758 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
2760 This is useful when the buffer has overall left-to-right paragraph
2761 direction and you need to insert a string whose contents are not known
2762 in advance, without disrupting the layout of the line.
2766 *** Window tree functions are accessible in Elisp.
2767 Functions are provided to return the parent, siblings or child windows
2768 of any window including internal windows (windows not associated with a
2769 buffer) in the window tree.
2771 **** New function `window-valid-p' gives non-nil for live and internal
2774 **** Window manipulation can deal with internal windows.
2775 Many window handling functions like `split-window', `delete-window', or
2776 `delete-other-windows' as well as the window resizing functions can now
2777 act on any window including internal ones.
2779 *** window-total-height/-width vs window-body-height/-width.
2780 The function `window-height' has been renamed to `window-total-height'
2781 and `window-width' has been renamed to `window-body-width'. The old
2782 names are provided as aliases. Two new functions `window-total-width'
2783 and `window-body-height' are provided.
2785 *** Window parameters specific to window handling functions.
2786 For each window you can specify a parameter to override the default
2787 behavior of a number of functions like `split-window', `delete-window'
2788 and `delete-other-windows'. The variable `ignore-window-parameters'
2789 allows to ignore processing such parameters.
2791 *** New semantics of third argument of `split-window'.
2792 The third argument of `split-window' has been renamed to SIDE and can be
2793 set to any of the values 'below, 'right, 'above, or 'left to make the
2794 new window appear on the corresponding side of the window that shall be
2795 split. Any other value of SIDE will cause `split-window' to split the
2796 window into two side-by-side windows as before.
2798 *** Window resizing functions.
2799 A new standard function for resizing windows called `window-resize' has
2800 been introduced. This and all other functions for resizing windows no
2801 longer delete any windows when they become too small.
2803 *** Deleting the selected window now selects the most recently selected
2804 live window on that frame instead.
2806 *** `adjust-window-trailing-edge' adjustments.
2807 `adjust-window-trailing-edge' can now deal with fixed-size windows and
2808 is able to resize other windows if a window adjacent to the trailing
2809 edge cannot be shrunk any more. This makes its behavior more similar to
2810 that of Emacs 21 without compromising, however, its inability to delete
2811 windows which was introduced in Emacs 22.
2813 *** Window-local buffer lists.
2814 Windows now have local buffer lists. This means that removing a buffer
2815 from display in a window will preferably show the buffer previously
2816 shown in that window with its previous window-start and window-point
2817 positions. This also means that the same buffer may be automatically
2818 shown twice even if it already appears in another window.
2820 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2821 which if non-nil requires the buffer to be displayed in the currently
2822 selected window, signaling an error otherwise. If nil, another window
2823 can be used, e.g. if the selected one is strongly dedicated.
2825 *** `split-window-vertically' and `split-window-horizontally' renamed
2826 to `split-window-below' and `split-window-right' respectively.
2827 The old names are kept as aliases.
2831 **** The second arg to `display-buffer' and `pop-to-buffer' is now
2832 named ACTION, and takes a display action of the same form as
2833 `display-buffer-base-action' (see Changes, above). A non-nil,
2834 non-list value is treated specially, as the old meaning.
2836 **** New variable `display-buffer-overriding-action'.
2838 **** The procedure of `display-buffer' etc. to choose a window is
2839 determined by combining `display-buffer-overriding-action',
2840 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2841 and `display-buffer-fallback-action'. The second and fourth of these
2842 are user-customizable variables.
2844 See the docstring of `display-buffer' for details.
2846 *** New functions `window-state-get' and `window-state-put'.
2847 These functions allow to save and restore the state of an arbitrary
2848 frame or window as an Elisp object.
2852 *** New variable `completion-extra-properties' used to specify extra
2853 properties of the current completion:
2854 - :annotate-function, same as the old completion-annotate-function.
2855 - :exit-function, function to call after completion took place.
2857 *** Functions on `completion-at-point-functions' can return any of the
2858 properties valid for `completion-extra-properties'.
2860 *** `completion-annotate-function' is obsolete.
2862 *** New `metadata' method for completion tables. The metadata thus returned
2863 can specify various details of the data returned by `all-completions':
2864 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2865 used to select a style in completion-category-overrides.
2866 - `annotation-function' to add annotations in *Completions*.
2867 - `display-sort-function' to specify how to sort entries in *Completions*.
2868 - `cycle-sort-function' to specify how to sort entries when cycling.
2870 *** `minibuffer-local-filename-must-match-map' is not used any more.
2871 Instead, the bindings in `minibuffer-local-filename-completion-map'
2872 are combined with `minibuffer-local-must-match-map'.
2874 *** New variable `completing-read-function' allows overriding the
2875 behavior of `completing-read'.
2877 ** `glyphless-char-display' can now distinguish between graphical and
2878 text terminal display, via a char-table entry that is a cons cell.
2880 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
2881 Instead, the offending function is removed.
2885 *** New function `run-hook-wrapped' for running an abnormal hook by
2886 passing the hook functions as arguments to a "wrapping" function.
2887 Like `run-hook-with-args-until-success', it stops at the first
2888 non-nil return value.
2890 *** New macro `with-wrapper-hook' for running an abnormal hook as a
2891 set of "wrapping" filters, similar to around advice.
2892 (A version of this macro was actually added in Emacs 23.2 but was not
2893 advertised at the time.)
2897 *** New macro `condition-case-unless-debug' (this was actually added in
2898 Emacs 23.1 as condition-case-no-debug, but not advertised)
2900 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
2902 *** Variable `stack-trace-on-error' removed.
2904 *** The debugger can now "continue" from an error, which means it will
2905 jump to the error handler as if the debugger had not been invoked
2906 instead of jumping all the way to the top-level.
2908 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2909 This can be useful when `inhibit-quit' is set.
2911 ** The new function `server-eval-at' allows evaluation of Lisp forms on
2912 named Emacs server instances.
2914 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
2915 to redirect STDOUT to a file.
2917 ** The function `format-time-string' now supports the %N directive,
2918 for higher-resolution time stamps.
2920 ** New input reading functions
2922 *** New function `read-char-choice' reads a restricted set of
2923 characters, discarding any inputs not inside the set.
2925 *** The command `read-color' now requires a match for a color name
2926 or RGB triplet, instead of signaling an error if the user provides
2929 **** `facemenu-read-color' is now an alias for `read-color'.
2931 ** `image-library-alist' is renamed to `dynamic-library-alist'.
2932 The variable is now used to load all kind of supported dynamic libraries,
2933 not just image libraries. The previous name is still available as an
2936 ** Syntax parsing changes
2938 *** New variable `syntax-propertize-function'.
2939 This replaces `font-lock-syntactic-keywords' which is now obsolete.
2940 This allows syntax-table properties to be set independently from font-lock:
2941 just call syntax-propertize to make sure the text is propertized.
2942 Together with this new variable come a new hook
2943 syntax-propertize-extend-region-functions, as well as two helper functions:
2944 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2945 as-is; and syntax-propertize-rules which provides a new way to specify
2948 *** Syntax tables support a new "comment style c" additionally to style b.
2950 ** New hook `post-self-insert-hook', run after `self-insert-command'.
2952 ** frame-local variables cannot be let-bound any more.
2954 ** Major and minor mode changes
2956 *** `set-auto-mode' now respects mode: local variables at the end of files,
2957 as well as those in the -*- line.
2959 *** `prog-mode' is a new major mode from which programming modes
2962 **** `prog-mode-hook' can be used to enable features for programming
2963 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2964 on-the-fly spell checking for comments and strings.
2966 **** New minor modes `prettify-symbols-mode' and
2967 `global-prettify-symbols-mode' let the user enable symbol
2968 prettification (replacing a string like "lambda" with the Greek lambda
2971 *** New hook `change-major-mode-after-body-hook', run by
2972 `run-mode-hooks' just before any other mode hooks.
2974 *** Enabled globalized minor modes can be disabled in specific major modes.
2975 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2976 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
2978 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
2980 ** File-handling changes
2982 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
2983 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2984 both non-nil. Interactively, TRASH defaults to t, unless a prefix
2985 argument is supplied (see Trash changes, above).
2987 *** New file predicates: `file-equal-p', `file-in-directory-p'.
2989 ** Tool-bars can display separators.
2990 Tool-bar separators are handled like menu separators in menu-bar maps,
2991 i.e. via menu entries of the form `(menu-item "--")'.
2995 *** Animated images support (currently animated gifs only).
2997 **** `image-animated-p' returns non-nil if an image can be animated.
2999 **** `image-animate' animates a supplied image spec.
3001 **** `image-animate-timer' returns the timer object for an image that
3004 *** `image-extension-data' has been renamed to `image-metadata'.
3005 The old name is an obsolete alias to the new one.
3007 *** Image mode can view any image type that ImageMagick supports.
3008 This requires Emacs to be built with ImageMagick support.
3010 **** New function `imagemagick-types', defined if ImageMagick support
3011 is enabled, returns a list of image file extensions that your
3012 ImageMagick installation supports.
3014 **** New function `imagemagick-register-types' enables ImageMagick
3015 image types in Image mode and in `create-image' and other helper
3018 **** New option `imagemagick-types-inhibit' excludes certain
3019 ImageMagick image types from `imagemagick-register-types'.
3021 **** With ImageMagick support, there are extra Image mode commands to
3022 resize and rotate images: `image-transform-fit-to-height',
3023 `image-transform-fit-to-width', `image-transform-set-rotation', and
3024 `image-transform-set-scale'.
3026 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3027 passes it to the mail user agent function. This argument specifies an
3028 action for returning to the caller after finishing with the mail. For
3029 example, this is used by Rmail to optionally delete a mail window.
3031 ** XML and HTML parsing
3032 If Emacs is compiled with libxml2 support, there are two new
3033 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3034 and `libxml-parse-xml-region' (which parses XML). Both return an
3035 Emacs Lisp parse tree.
3037 ** Networking and encryption changes
3039 *** `open-network-stream' can now be used to open an encrypted stream.
3040 It now accepts an optional `:type' parameter for initiating a TLS
3041 connection, directly or via STARTTLS. To do STARTTLS, additional
3042 parameters (`:end-of-command', `:success', `:capabilities-command')
3043 must also be supplied.
3045 *** New library gnutls.el.
3046 The new function `gnutls-available-p' returns non-nil if Emacs is
3047 built with GnuTLS support. The main entry points are
3048 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3049 these functions through `open-network-stream', because that can
3050 upgrade connections through STARTTLS opportunistically or use plain
3051 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3054 *** New primitive `secure-hash' that supports many secure hash algorithms:
3055 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3056 sha1.el has been removed. The `sha1' feature is provided by default.
3060 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3062 ** Progress reporters can now "spin".
3063 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3064 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3065 time you call `progress-reporter-update' on that progress reporter,
3066 with a nil or omitted VALUE argument, the reporter message is
3067 displayed with a "spinning bar".
3069 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3070 being reverted, even if the buffer has a local `revert-buffer-function'.
3072 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3073 If delayed-warnings-list is non-nil, the command loop calls
3074 `delayed-warnings-hook' after `post-command-hook'. At present, this
3075 is only used by Emacs on some platforms to display warnings during
3076 startup, which might otherwise not be noticed. This uses the
3077 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3079 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3081 ** New function `make-composed-keymap' that constructs a new keymap
3082 from multiple input maps. You can use this to make a keymap that
3083 inherits from multiple maps, eg:
3084 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3086 ** New function `string-prefix-p'.
3087 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3089 ** New reader macro ## that stands for the empty symbol.
3090 This means that the empty symbol can now be read back. Also, #: by itself
3091 (when not immediately followed by a possible symbol character) stands for
3092 an empty uninterned symbol.
3094 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3096 ** The following functions and variables are obsolete:
3098 *** `tooltip-use-echo-area' is obsolete.
3099 Rather than setting this to t, disable Tooltip mode instead.
3101 *** buffer-substring-filters is obsolete.
3102 Use `filter-buffer-substring-functions' instead.
3104 *** `byte-compile-disable-print-circle' is obsolete.
3106 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3107 Use `post-command-hook' instead.
3109 *** `font-lock-maximum-size' is obsolete.
3112 * Changes in Emacs 24.1 on Non-Free Operating Systems
3114 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3115 and also when HOME is set to C:\ by default.
3117 ** New configure.bat options
3119 *** --enable-checking builds Emacs with extra runtime checks.
3121 *** --distfiles specifies files to be included in binary distribution.
3123 *** --without-gnutls disables automatic GnuTLS detection.
3125 *** --lib for general library linkage, works with the USER_LIBS build variable.
3127 ** New make target `dist' to create binary distribution for MS Windows.
3129 ** The Lisp function `w32-default-color-map' is now obsolete.
3130 (It is only used internally in the Emacs C code.)
3132 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3133 reappear on mouse-over. (Requires OS X 10.6 or later.)
3135 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3136 other platforms, rather than inserting its contents into the buffer.
3139 ----------------------------------------------------------------------
3140 This file is part of GNU Emacs.
3142 GNU Emacs is free software: you can redistribute it and/or modify
3143 it under the terms of the GNU General Public License as published by
3144 the Free Software Foundation, either version 3 of the License, or
3145 (at your option) any later version.
3147 GNU Emacs is distributed in the hope that it will be useful,
3148 but WITHOUT ANY WARRANTY; without even the implied warranty of
3149 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3150 GNU General Public License for more details.
3152 You should have received a copy of the GNU General Public License
3153 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3158 paragraph-separate: "[
\f]*$"