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 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 ** When initializing `load-path', an empty element in the EMACSLOADPATH
67 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
68 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
69 load-path (the one that would have been used if EMACSLOADPATH was unset).
70 This makes it easier to _extend_ the load-path via EMACSLOADPATH
71 (previously, EMACSLOADPATH had to specify the complete load-path,
72 including the defaults). (In older versions of Emacs, an empty element
73 was replaced by ".", so use an explicit "." now if that is what you want.)
76 ** The -L option, which normally prepends its argument to load-path,
77 will instead append, if the argument begins with `:' (or `;' on MS Windows;
78 i.e., `path-separator').
81 ** If you use either site-load.el or site-init.el to customize the dumped
82 Emacs executable, any changes to `load-path' that these files make
83 will no longer be present after dumping. To affect a permanent change
84 to `load-path', use the `--enable-locallisppath' option of `configure'.
87 * Changes in Emacs 24.4
90 ** Emacs now supports menus on text-mode terminals.
91 If the terminal supports a mouse, clicking on the menu bar, or on
92 sensitive portions of the mode line or header line, will drop down the
93 menu defined at that position. Likewise, clicking C-mouse-2 or
94 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
97 If the text terminal does not support a mouse, you can activate the
98 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
100 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
101 customize the option `tty-menu-open-use-tmm' to a non-nil value.
102 (Typing M-` will always invoke `tmm-menubar', even if
103 `tty-menu-open-use-tmm' is nil.)
105 ** Key ? also describes prefix bindings like C-h.
108 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
109 because it affects caching of paragraph scanning results as well.
112 ** `apropos-variable' is now `apropos-user-option'
113 `apropos-user-option' shows all user options while `apropos-variable'
114 shows all variables. When called with a universal prefix argument,
115 the two commands swap their behaviors. When `apropos-do-all' is
116 non-nil, they output the same results.
119 ** `eval-defun' on an already defined defcustom calls the :set function,
122 ** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
123 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
124 a list with no limit on its length and level (by using nil values of
125 `print-length' and `print-level'), and inserts additional formats for
126 integers (octal, hexadecimal, and character).
128 ** If the new variable `enable-dir-local-variables' is nil,
129 directory local variables are ignored. May be useful for some modes
130 that want to ignore directory-locals while still respecting file-locals.
132 ** The option `set-mark-default-inactive' has been deleted.
133 This unfinished feature was introduced by accident in Emacs 23.1;
134 simply disabling Transient Mark mode does the same thing.
136 ** `initial-buffer-choice' can now specify a function to set up the
139 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
140 and read-only. Code that might create the *Messages* buffer should
141 call the function `messages-buffer' to do so and set the mode.
143 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
144 You may think of it as a *scratch* buffer whose content is preserved.
145 In fact, it was designed as a replacement for *scratch* buffer and can
146 be used that way by setting `initial-buffer-choice' to `remember-notes'
147 and `remember-notes-buffer-name' to "*scratch*". Without the second
148 change, *scratch* buffer will still be there for notes that do not
149 need to be preserved.
151 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
153 ** ACL support has been added.
155 *** Emacs preserves the ACL entries of files when backing up.
157 *** New functions `file-acl' and `set-file-acl' get and set the ACL
158 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
159 libacl. On MS-Windows, the NT Security APIs are used to emulate the
160 POSIX ACL interfaces.
162 ** New option `scroll-bar-adjust-thumb-portion'.
163 Available only on X, this option allows to control over-scrolling
164 using the scroll bar (i.e. dragging the thumb down even when the end
165 of the buffer is visible).
167 ** New function `add-face-text-property' has been added, which can be
168 used to conveniently prepend/append new face attributes to text.
170 ** In compiled Lisp files, the header no longer includes a timestamp.
172 ** Multi-monitor support has been added.
174 *** New functions `display-monitor-attributes-list' and
175 `frame-monitor-attributes' can be used to obtain information about
176 each physical monitor on multi-monitor setups.
178 *** The functions `display-pixel-width' and `display-pixel-height' now
179 behave consistently among the platforms: they return the pixel width
180 or height for all physical monitors associated with the given display
181 as just they were on X11. To get information for each physical
182 monitor, use the new functions above. Similar notes also apply to
183 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
184 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
186 ** New macro `define-alternatives' can be used to define generic commands.
187 Generic commands are interactive functions whose implementation can be
188 selected among several alternatives, as a matter of user preference.
190 ** New hooks `focus-in-hook', `focus-out-hook'.
191 These are normal hooks run when an Emacs frame gains or loses input focus.
193 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
194 You can change the default by customizing the variable blink-cursor-blinks.
195 Also timers for blinking are stopped when no blinking is done, so Emacs does
196 not consume CPU cycles.
198 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
199 `frame-configuration-to-register'. It offers similar functionality, plus
200 some enhancements, like the ability to restore deleted frames. Command
201 `frame-configuration-to-register' is still available, but unbound.
203 ** The command `quail-help' is deleted. Use `C-h C-\'
204 (`describe-input-method') instead.
206 ** The default value of `comment-use-global-state' is changed to t,
207 and this variable has been marked obsolete.
209 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
210 a 1-letter word, which is an error according to Polish and
211 Czech typography rules. To globally enable this feature, evaluate:
213 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
216 * Editing Changes in Emacs 24.4
218 ** `electric-indent-mode' is enabled by default.
220 ** Uniquify is enabled by default with post-forward-angle-brackets style.
222 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
223 Most commands are still unaware of it, but kill/yank do work on the rectangle.
225 ** C-x TAB enters a transient interactive mode.
226 You can then use the left/right cursor keys to move the block of text.
228 ** `tab-stop-list' is now implicitly extended to infinity by repeating
229 the last step. Its default value is changed to nil which means a tab
230 stop every `tab-width' columns.
232 ** `split-window' is no longer a command, just a non-interactive function.
233 As a command it was a special case of `split-window-below', and as such
234 superfluous. After being reimplemented in Lisp, its interactive form
235 was mistakenly retained.
237 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
238 bound to <f11> and M-<f10>, respectively.
240 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
244 ** New option `visual-order-cursor-movement'.
245 If this is non-nil, cursor motion with arrow keys will follow the
246 visual order of characters on the screen: <left> always moves to the
247 left, <right> always moves to the right, disregarding the surrounding
248 bidirectional context.
250 ** All register commands can now show help with preview.
252 ** New command `kmacro-to-register' to store keyboard macros in registers.
256 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
257 You can pick the name of the function and the variables with `C-x 4 a'.
260 * Changes in Specialized Modes and Packages in Emacs 24.4
263 *** CUA-mode was changed to make use of delete-selection-mode and
264 shift-select-mode. So you can now enable it independently from
265 transient-mark-mode, delete-selection-mode, and shift-select-mode.
266 As a result, cua-highlight-region-shift-only is obsolete
267 (you can disable transient-mark-mode to get the same result).
268 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
270 ** `delete-selection-mode' can be used without transient-mark-mode.
272 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
274 ** SMIE indentation can be customized via `smie-config'.
275 The customization can be guessed by Emacs by providing a sample indented
276 file and letting SMIE learn from it.
278 ** sh-script now uses its SMIE indentation algorithm by default.
280 ** `eshell' now supports visual subcommands and options
281 Eshell has been able to handle "visual" commands (interactive,
282 non-line oriented commands such as top that require display
283 capabilities not provided by eshell) by running them in an Emacs
284 terminal emulator. See `eshell-visual-commands'.
286 This feature has been extended to subcommands and options that make a
287 usually line-oriented command a visual command. Typical examples are
288 "git log" and "git <command> --help" which display their output in a
289 pager by default. See `eshell-visual-subcommands' and
290 `eshell-visual-options'.
292 ** If your Emacs is compiled with libxml2 support, you can use the new
293 built-in web browser `eww'.
295 ** `remember' can now store notes in separates files
296 You can use the new function `remember-store-in-files' within the
297 `remember-handler-functions' option.
299 See `remember-data-directory' and `remember-directory-file-name-format'
300 for new options related to this function.
302 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
304 ~/.emacs.d/timelog replaces ~/.timelog
305 ~/.emacs.d/vip replaces ~/.vip
306 ~/.emacs.d/viper replaces ~/.viper
307 ~/.emacs.d/ido.last replaces ~/.ido.last
308 ~/.emacs.d/kkcrc replaces ~/.kkcrc
309 ~/.emacs.d/quickurls replaces ~/.quickurls
310 ~/.emacs.d/idlwave replaces ~/.idlwave
311 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
312 ~/.emacs.d/places replaces ~/.emacs-places
313 ~/.emacs.d/shadows replaces ~/.shadows
314 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
315 ~/.emacs.d/strokes replaces ~/.strokes
316 ~/.emacs.d/notes replaces ~/.notes
317 ~/.emacs.d/type-break replaces ~/.type-break
318 Also the following files used by the now obsolete otodo-mode.el:
319 ~/.emacs.d/todo-do replaces ~/.todo-do
320 ~/.emacs.d/todo-done replaces ~/.todo-done
321 ~/.emacs.d/todo-top replaces ~/.todo-top
324 ** Delphi mode is now called OPascal mode.
325 *** All delphi-* variables and functions have been renamed to opascal-*.
326 *** `delphi-newline-always-indents' is not supported any more.
327 Use `electric-indent-mode' instead.
328 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
330 ** Eldoc Mode works properly in the minibuffer.
332 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
334 ** completing-read-multiple's separator can now be a regexp.
335 The default separator is changed to allow surrounding spaces around the comma.
337 ** The backtrace debugger and local variables:
338 *** The debugger's `e' command evaluates the code in the context at point.
339 This includes using the lexical environment at point, which means that
340 `e' now lets you access lexical variables as well.
341 *** The backtrace debugger can display local vars with `v'.
345 *** Battery information via the BSD `apm' utility is now supported.
349 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
351 ** Calendar and Diary
353 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
354 `calendar-month-header'.
356 *** New option `calendar-day-header-array'.
358 *** The variable `calendar-font-lock-keywords' is obsolete.
361 *** New variable `diary-from-outlook-function', used by the command
362 `diary-from-outlook'.
364 ** VC and related modes
366 *** In VC directory mode, `D' displays diffs between VC-controlled
367 whole tree revisions.
369 *** In VC directory mode, `L' lists the change log for the current VC
370 controlled tree in a window.
372 *** In VC directory mode, `I' shows a log of changes that will be
373 received with a pull operation.
375 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
376 under current version control system. When called with a prefix
377 argument, you can remove a file from the ignored file list.
379 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
380 because it is moved to vc-cvs.el.
384 *** New macro cl-tagbody.
387 *** letf is now just an alias for cl-letf.
391 *** Calc by default now uses the Gregorian calendar for all dates, and
392 uses January 1, 1 AD as its day number 1. Previously Calc used the
393 Julian calendar for dates before September 14, 1752, and it used
394 December 31, 1 BC as its day number 1; the new scheme is more
395 consistent with Calendar's calendrical system and day numbering.
397 *** The new variable `calc-gregorian-switch' lets you configure the
398 date when Calc switches from the Julian to the Gregorian calendar.
399 Nil, the default value, means to always use the Gregorian calendar.
400 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
403 *** Support for ISO 8601 dates.
407 *** `desktop-auto-save-timeout' defines the number of seconds idle time
408 before auto-save of the desktop.
410 *** `desktop-restore-frames', enabled by default, allows saving and
411 restoring the frame/window configuration (frameset). Additional options
412 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
413 and `desktop-restore-forces-onscreen' offer further customization.
417 *** New minor mode `dired-hide-details-mode' hides details.
421 *** New option `erc-accidental-paste-threshold-seconds'.
422 If set to a number, this can be used to avoid accidentally paste large
423 amounts of data into the ERC input.
427 *** New option `epa-mail-aliases'.
429 You can set this to a list of alias expansions for keys to use
430 in `epa-mail-encrypt'.
432 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
433 that means: when one of the recipients of the message being encrypted
434 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
436 If one element of the variable's value is ("foo@bar.com"),
437 that means: when one of the recipients of the message being encrypted
438 is `foo@bar.com', ignore that name as regards encryption.
439 This is useful to avoid a query when you have no key for that name.
442 ** New F90 mode option `f90-smart-end-names'.
444 ** Icomplete is a bit more like Ido.
445 *** key bindings to navigate through and select the completions.
446 *** The icomplete-separator is customizable, and its default has changed.
447 *** Removed icomplete-show-key-bindings.
448 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
449 (setq icomplete-with-completion-tables '(internal-complete-buffer))
450 will revert to the old behavior.
453 ** New features for Octave mode:
454 *** Font locking for texinfo comments and new keywords
455 *** Completion in Octave file buffers
457 *** Jump to definition
458 *** Documentation lookup/search
459 *** Code cleanup and various bug fixes
462 *** Ido has a manual now.
463 *** `ido-use-virtual-buffers' takes a new value 'auto.
464 *** `ido-decorations' has been slightly extended to give a bit more control.
468 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
469 visit the next image file and the previous image file in the same
470 directory, respectively.
472 *** New commands to show specific frames of multi-frame images.
473 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
474 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
476 *** New commands to speed up, slow down, or reverse animation.
479 *** The command `image-mode-fit-frame' deletes other windows.
480 When toggling, it restores the frame's previous window configuration.
481 It also has an optional frame argument, which can be used by Lisp
482 callers to fit the image to a frame other than the selected frame.
486 *** New face `info-index-match' is used to highlight matches in index
487 entries displayed by `Info-index-next', `Info-virtual-index' and
492 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
493 will cycle through faces in `hi-lock-face-defaults' without prompting.
496 *** New global command `M-s h .' (`highlight-symbol-at-point')
497 highlights the symbol found near point without prompting,
498 using the next face automatically.
500 ** Search and Replace
502 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
503 starts a symbol (identifier) incremental search forward with the
504 symbol found near point added to the search string initially.
506 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
507 and adds it to the search string.
509 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
510 between nil and the value of the option `search-invisible' (or `open'
513 *** `query-replace' skips invisible text when `search-invisible' is nil,
514 and opens overlays with hidden text when `search-invisible' is `open'.
516 *** A negative prefix arg of replacement commands replaces backward.
517 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
518 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
521 *** By default, prefix arguments do not now terminate Isearch mode.
522 Set `isearch-allow-prefix' to nil to restore old behavior.
524 *** More Isearch commands accept prefix arguments, namely
525 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
528 *** Word search now matches whitespace at the beginning/end
529 of the search string if it contains leading/trailing whitespace.
530 In an incremental word search or when using a non-nil LAX argument
531 of `word-search-regexp', the lax matching can also match part of
532 the first word (in addition to the lax matching of the last word).
533 The same rules are now applied to the symbol search with the difference
534 that it matches symbols, and non-symbol characters between symbols.
536 ** MH-E has been updated to MH-E version 8.5.
537 See MH-E-NEWS for details.
540 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
541 Customize `unrmail-mbox-format' to change this.
544 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
545 of how Rmail displays non-MIME messages.
548 ** New function `ses-rename-cell' to give SES cells arbitrary names.
550 ** trace-function was largely rewritten.
551 New features include:
552 - no prompting for the destination buffer, unless a prefix-arg was used.
553 - additionally to prompting for a destination buffer, when a prefix-arg is
554 used, the user can enter a "context", i.e. Lisp expression whose value at the
555 time the function is entered/exited will be printed along with the function
556 name and arguments. Useful to trace the value of (current-buffer) or
557 (point) when the function is invoked.
559 ** New command `delete-duplicate-lines' has new types of operation:
560 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
561 it works like the utility `uniq'. Otherwise by default it deletes
562 duplicate lines everywhere in the region without regard to adjacency.
563 When its arg KEEP-BLANKS is non-nil (when called interactively with
564 C-u C-u C-u), duplicate blank lines are preserved.
566 ** New `cycle-spacing' command allows cycling between having just one
567 space, no spaces, or reverting to the original spacing. Like
568 `just-one-space' command it can handle or ignore newlines and
569 leave different number of spaces.
571 ** Todo mode has been rewritten and enhanced.
572 New features include:
573 - support for multiple todo files and archive files of done items;
574 - renaming, reordering, moving, merging, and deleting categories;
575 - sortable tabular summaries of categories and the types of items they contain;
576 - cross-category lists of items filtered by specific criteria;
577 - more fine-grained interaction with the Emacs diary, by being able to decide
578 for each todo item whether it appears in the Fancy Diary display;
579 - highly flexible new item insertion and item editing;
580 - moving items between categories, storing done items in their category or in
581 archive files, undoing or unarchiving done items;
582 - reprioritizing items by inputting a numerical priority;
583 - extensive customizability of operation and display, including numerous faces.
584 The Todo mode user manual describes all commands and most user options.
585 To support some of these features, a new file format is used, which is
586 incompatible with the old format; however, you can convert old todo and done
587 item files to the new format on initializing the first new todo file, or at any
588 later time with the provided conversion command. The old version of
589 todo-mode.el has been made obsolete and renamed otodo-mode.el.
593 *** The experimental url syntax for remote file names is withdrawn.
596 *** New connection method "adb", which allows to access Android
597 devices by the Android Debug Bridge. The variable `tramp-adb-program'
598 can be used to adapt the path of the "adb" program, if needed.
600 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
601 "scpc" and "rsyncc" are discontinued. The ssh option
602 "ControlMaster=auto" is set automatically in all ssh-based methods,
606 *** Handlers for `file-acl' and `set-file-acl' for remote machines
607 which support POSIX ACLs.
610 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
611 for remote machines which support filesystem notifications.
615 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
617 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
621 *** The commands `woman-default-faces' and `woman-monochrome-faces'
622 are obsolete. Customize the `woman-*' faces instead.
626 *** Added Eshell-Tramp module
627 External su and sudo commands are now the default; the internal,
628 Tramp-using variants can still be used by enabling the eshell-tramp
633 *** The format of `archive-contents' files, generated by package
634 repositories, has changed to allow a new (fifth) element in the data
635 vectors, containing an associative list with extra properties.
637 *** `describe-package' buffer uses the `:url' extra property to
638 display a `Homepage' header, if it's present.
640 ** New term.el option `term-suppress-hard-newline'.
646 **** The cpp-root project now supports executing a compile command.
647 It can be set through the new :compile-command slot or the
648 buffer-local variable `compile-command'.
650 **** Better selection of include directories for the 'linux' project.
651 Include directories now support out-of-tree build directories and
652 target architecture auto-detection.
656 **** Improved detection of used namespaces in current scope in C++.
658 **** Parsing of default values for variables and function arguments in C/C++.
659 They are also displayed by the summarize feature in the modeline.
661 **** Improved parsing of function pointers in C/C++.
662 This also includes parsing of function pointers as function arguments.
664 **** Parsing of C/C++ preprocessor macros which open new scope.
665 For example, this enables parsing of macros which open new namespaces.
667 **** Support for 'this' pointer in inline member functions in C++.
669 ** Obsolete packages:
671 *** Iswitchb is made obsolete by icomplete-mode.
673 *** longlines.el is obsolete; use visual-line-mode instead.
678 *** terminal.el is obsolete; use term.el instead.
680 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
685 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
688 *** The Info-edit command is obsolete. Editing Info nodes by hand
689 has not been relevant for some time.
693 *** `explicit-bash-args' now always defaults to use --noediting.
694 During initialization, Emacs no longer expends a process to decide
695 whether it is safe to use Bash's --noediting option. These days
696 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
699 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
703 *** New option `imenu-generic-skip-comments-and-strings'.
707 *** New option `ruby-encoding-magic-comment-style'.
709 *** New option `ruby-custom-encoding-magic-comment-template'.
713 *** Improved syntax highlighting and indentation.
715 *** Add more Ruby file types to `auto-mode-alist'.
717 *** New option `ruby-align-to-stmt-keywords'.
721 *** Better indentation of multiple-variable declarations.
722 If declaration spans several lines, variables on the following lines
723 are lined up to the first one.
725 *** We now recognize and better indent continuations in array
728 *** New option `js-switch-indent-offset`.
731 * New Modes and Packages in Emacs 24.4
733 ** New `superword-mode' in subword.el
734 `superword-mode' overrides the default word motion commands to treat
735 symbol_words as a single word, similar to what `subword-mode' does and
736 using the same internal functions.
738 ** New nadvice.el package offering lighter-weight advice facilities.
740 - add-function/remove-function which can be used to add/remove code on any
741 function-carrying place, such as process-filters or `<foo>-function' hooks.
742 - advice-add/advice-remove to add/remove a piece of advice on a named function,
743 much like `defadvice' does.
745 ** New frameset.el package.
746 It provides a set of operations to save a frameset (the state of all
747 or a subset of the existing frames and windows, somewhat similar to a
748 frame configuration), both in-session and persistently, and restore it
749 at some point in the future.
752 ** The package filenotify.el provides an interface for file system
753 notifications. It requires, that Emacs is compiled with one of the
754 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
757 * Incompatible Lisp Changes in Emacs 24.4
759 ** `kill-region' lost its `yank-handler' optional argument.
761 ** `(input-pending-p)' no longer runs other timers which are ready to
762 run. The new optional CHECK-TIMERS param allows for the prior behavior.
764 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
766 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
767 Some languages match those as »...« and others as «...» so better stay neutral.
769 ** The default file coding for Emacs Lisp files is now utf-8.
770 (See file-coding-system-alist.) In most cases, this change is transparent, but
771 files that contain unusual characters without specifying an explicit coding
772 system may fail to load with obscure errors.
773 You should either convert them to utf-8 or add an explicit `coding:' cookie.
775 ** overriding-terminal-local-map does not replace the local keymaps any more.
776 It used to disable the minor mode, major mode, and text-property keymaps,
777 whereas now it simply has higher precedence.
779 ** Default process filters and sentinels are not nil any more.
780 Instead they default to a function which does what the nil value used to do.
782 ** `read-event' does not return decoded chars in ttys any more.
783 Just as was the case in Emacs-22 and before, decoding of tty input according to
784 keyboard-coding-system is not performed in read-event any more. But contrary
785 to that past, it is still done before input-decode-map/function-key-map/...
787 ** Removed inhibit-local-menu-bar-menus.
789 ** frame-local variables that affect redisplay do not work any more.
790 More specifically, the redisplay does not bother to check for a frame-local
791 value when looking up variables.
793 ** nil and "unbound" are indistinguishable in symbol-function.
794 `symbol-function' never signals `void-function' any more.
795 `fboundp' returns non-nil if the symbol was `fset' to nil.
797 ** `defadvice' does not honor the `freeze' flag and cannot advise
798 special-forms any more.
800 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
801 VAR was bound to nil which was not tremendously useful and just lead to
802 spurious warnings about an unused var.
804 ** The return value of `backup-buffer' has changed.
805 The second argument is no longer an SELinux context, instead it is an
806 alist of extended attributes as returned by the new function
807 `file-extended-attributes'. The attributes can be applied to another
808 file using `set-file-extended-attributes'.
810 ** `visited-file-modtime' now returns -1 for nonexistent files.
811 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
812 in the presence of files with negative time stamps.
814 ** The cars of the elements in `interpreter-mode-alist' are now treated
815 as regexps rather than literal strings. Technically this is an
816 incompatible change, but unless you are using interpreter-mode-alist
817 for something (not just adding elements to it), it ought not to affect you.
820 * Lisp Changes in Emacs 24.4
822 ** New option `load-prefer-newer', if non-nil, means that when both
823 .el and .elc versions of a file exist, rather than `load' always
824 choosing the .elc version, it will choose whichever is newer
825 (unless you explicitly specify one or the other).
827 ** New function get-pos-property.
829 ** New hook `pre-redisplay-function'.
832 ** Functions that pop up menus and dialogs now work on all terminal types,
834 This includes `x-popup-menu', `x-popup-dialog', `message-box',
837 The function `display-popup-menus-p' will now return non-nil for a
838 display or frame whenever a mouse is supported on that display or
841 ** New bool-vector set operation functions:
842 *** `bool-vector-exclusive-or'
843 *** `bool-vector-union'
844 *** `bool-vector-intersection'
845 *** `bool-vector-set-difference'
846 *** `bool-vector-not'
847 *** `bool-vector-subsetp'
848 *** `bool-vector-count-consecutive'
849 *** `bool-vector-count-population'
851 ** Comparison functions =, <, >, <=, >= now take many arguments.
853 ** The second argument of `eval' can now be a lexical-environment.
855 ** `with-demoted-errors' takes an additional argument `format'.
857 ** New function `define-error'.
859 ** New hook `tty-setup-hook'.
862 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
864 ** New library helpers.el for misc helper functions
865 *** `hash-table-keys'
866 *** `hash-table-values'
871 *** `string-trim-left'
872 *** `string-trim-right'
875 ** Obsoleted functions:
878 *** `lisp-complete-symbol'
880 *** `minibuffer-completion-contents'
881 *** `isearch-nonincremental-exit-minibuffer'
882 *** `isearch-filter-visible'
883 *** `generic-make-keywords-list'
885 ** `with-wrapper-hook' is obsoleted by `add-function'.
886 The few hooks that used with-wrapper-hook are replaced as follows:
887 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
888 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
889 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
891 ** `byte-compile-interactive-only-functions' is now obsolete.
892 It has been replaced by the symbol property 'interactive-only.
894 ** `split-string' now takes an optional argument TRIM.
895 The value, if non-nil, is a regexp that specifies what to trim from
896 the start and end of each substring.
898 ** New function `string-suffix-p'.
900 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
902 ** Support for filesystem notifications.
903 Emacs now supports notifications of filesystem changes, such as
904 creation, modification, and deletion of files. This requires the
905 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
906 MS-Windows systems, this is supported for Windows XP and newer
909 ** Changes in autorevert.el
912 *** If Emacs is compiled with file notification support, notifications
913 are used instead of checking the time stamp of the files. You can
914 disable this by setting the user option `auto-revert-use-notify' to
915 nil. Alternatively, a regular expression of directories to be
916 excluded from file notifications can be specified by
917 `auto-revert-notify-exclude-dir-regexp'.
920 *** The new user option `auto-revert-remote-files' enables reversion
921 of remote files when set to non-nil.
925 *** The function `face-spec-set' is now analogous to `setq' for face specs.
926 Its third arg now accepts values specifying exactly which face spec to
927 set (defface, custom, or user spec), and it directly sets the relevant
928 property using the supplied face spec.
930 *** Face specs set via Custom themes now replace the `defface' spec
931 rather than inheriting from it (as do face specs set via Customize).
933 *** New face characteristic (supports :underline (:style wave))
934 specifies whether or not the terminal can display a wavy line.
936 *** New face spec attribute :distant-foreground
937 specifies foreground to use if background color is near the foreground
938 color that would otherwise have been used.
943 *** `image-animated-p' is now `image-multi-frame-p'.
944 It returns non-nil for any image that contains multiple frames,
945 whether or not it specifies a frame delay.
948 *** When animating images that do not specify a frame delay,
949 Emacs uses `image-default-frame-delay'.
952 *** New functions `image-current-frame' and `image-show-frame' for getting
953 and setting the current frame of a multi-frame image.
955 *** You can change the speed of animated images.
959 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
960 **** object-name -> eieio-object-name
961 **** object-class -> eieio-object-class
962 **** object-class-fast -> eieio--object-class
963 **** object-name-string -> eieio-object-name-string
964 **** object-num-slots -> eieio--object-num-slots
965 **** object-set-name-string -> eieio-object-set-name-string
966 **** class-parent -> eieio-class-parent
967 **** class-parents -> eieio-class-parents
968 **** class-children -> eieio-class-children
969 **** class-num-slots -> eieio--class-num-slots
970 **** class-precedence-list -> eieio-class-precedence-list
971 **** All generated class-* and object-* field accessors are now
972 prefixed with `eieio-' as well.
974 *** Obsoleted functions:
976 **** class-direct-subclasses
977 **** class-direct-superclasses
979 ** Changes in encoding and decoding of text
982 *** New coding-system `prefer-utf-8'.
983 This is like `undecided' but prefers UTF-8 on decoding if the text to
984 be decoded does not contain any invalid UTF-8 sequences. On encoding,
985 any non-ASCII characters are automatically encoded as UTF-8.
988 *** New attributes of coding-systems whose type is `undecided'.
989 Two new attributes, `:inhibit-null-byte-detection' and
990 `:inhibit-iso-escape-detection', determine how to detect encoding of
991 text that includes null bytes and ISO-2022 escape sequences,
992 respectively. Each of these attributes can be either nil, zero, or
993 t. If it is t, decoding text ignores null bytes and, respectively,
994 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
995 with no-conversion and ISO-2022 sequences cause Emacs to assume the
996 text is encoded in one of the ISO-2022 encodings, such as
997 iso-2022-7bit. If the value is zero, Emacs consults the variables
998 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1000 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1001 UTF-8 encoding and decoding, whenever possible.
1003 These attributes are only meaningful for coding-systems of type
1004 `undecided'. (The type of a coding-system is determined by its
1005 `:coding-type' attribute and can be accessed by calling the
1006 `coding-system-type' function.)
1008 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
1009 with the same interpretation as the returned value of `visited-file-modtime'.
1011 ** time-to-seconds is not obsolete any more.
1012 ** New functions special-form-p and macrop.
1013 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1014 text-property on the first char.
1016 ** The `defalias-fset-function' property lets you catch calls to defalias
1017 and redirect them to your own function instead of `fset'.
1019 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1020 When you edit DIR/FILE, Emacs normally creates a symbolic link
1021 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1022 is being edited. Formerly, if there was already a non-symlink file
1023 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1024 through DIR/.#FILE.9. These fallbacks have been removed, so that
1025 Emacs now no longer locks DIR/FILE in that case.
1027 On file systems that do not support symbolic links, the lock is now a
1028 regular file with contents being what would have been in the symlink.
1030 ** The 9th element returned by `file-attributes' is now unspecified.
1031 Formerly, it was t if the file's gid would change if file were deleted
1032 and recreated. This value has been inaccurate for years on many
1033 platforms, and nobody seems to have noticed or cared.
1035 ** The function `file-ownership-preserved-p' now has an optional
1036 argument GROUP which causes it check for file group too. This can be
1037 used in place of the 9th element of `file-attributes'.
1039 ** New functions `group-gid' and `group-real-gid'.
1041 ** The 6th argument to `copy-file' has been renamed to
1042 `preserve-extended-attributes' as it now handles both SELinux context
1045 ** The `common-substring' argument of display-completion-list is obsolete.
1046 Either use `completion-all-completions' which already returns highlighted
1047 strings (including for partial or substring completion) or call
1048 `completion-hilit-commonality' to add the highlight.
1050 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1052 *** The package descriptor and name of global variables, constants,
1053 and functions should be separated by two hyphens if the symbol is not
1054 meant to be used by other packages.
1057 * Changes in Emacs 24.4 on Non-Free Operating Systems
1059 ** The procedure for building Emacs on MS-Windows has changed.
1060 It is now built by running the same configure script as on all other
1061 platforms. This requires the MSYS environment and MinGW development
1062 tools. See the updated instructions in nt/INSTALL for details.
1064 Using the Posix configure script and Makefile's also means a change in
1065 the directory structure of the Emacs installation on Windows. It is
1066 now the same as on GNU and Unix systems. In particular, the auxiliary
1067 programs, such as cmdproxy.exe and hexl.exe, are in
1068 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1069 version), version-independent site-lisp is in share/emacs/site-lisp,
1070 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1071 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1072 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1073 directories and will find the files in there automatically; there's no
1074 need to set any variables due to this change.)
1077 ** Emacs on Windows 2000 and later can now access files and directories
1078 whose names cannot be encoded in the current system codepage.
1080 The new variable `w32-unicode-filenames' controls this feature: if it
1081 is t, Emacs uses Unicode APIs to pass file names to system calls,
1082 which lifts the limitation of file names to the current locale.
1085 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1086 The backtrace is written to the 'emacs_backtrace.txt' file in the
1087 directory where Emacs was running.
1090 ** The variable `buffer-file-type' is no longer supported.
1091 Setting it has no effect, and %t in the mode-line format is ignored.
1092 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1093 modifying it has no effect.
1096 ** Lock files now work on MS-Windows.
1097 This allows to avoid losing your edits if the same file is being
1098 edited in another Emacs session or by another user. See the node
1099 "Interlocking" in the Emacs User Manual for the details. To disable
1100 file locking, customize `create-lockfiles' to nil.
1102 ** Improved fullscreen support on Mac OS X.
1103 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1104 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1105 native is the default.
1108 * Installation Changes in Emacs 24.3
1110 ** The default X toolkit is now Gtk+ version 3.
1111 If you don't pass `--with-x-toolkit' to configure, or if you use
1112 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1113 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1114 You can explicitly require a specific version by passing
1115 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1117 ** New configure option `--enable-link-time-optimization', to utilize
1118 an appropriate feature provided by GCC since version 4.5.0.
1120 ** New configure option `--without-all' to disable most of the optional
1121 features (image support, etc.) that are normally enabled by default.
1123 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1124 Emacs). If building with GCC, this enables compile-time checks that
1125 warn/give errors about possibly-questionable C code. On a recent GNU
1126 system there should be no warnings; on older and on non-GNU systems
1127 the results may be useful to developers.
1129 ** The configure option `--enable-use-lisp-union-type' has been
1130 renamed to `--enable-check-lisp-object-type', as the resulting
1131 Lisp_Object type no longer uses a union to implement the compile time
1132 check that this option enables.
1134 ** The configure option `--disable-maintainer-mode' has been removed,
1135 as it was confusingly-named and rarely useful.
1137 ** The configure options `--program-prefix', `--program-suffix', and
1138 `--program-transform-name' apply to more than just the installed
1139 binaries. Now they also affect the man pages, icons, and the
1140 etc/emacs.desktop file; but not the info pages, since this would break
1141 links between the various manuals.
1143 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1144 overwriting "emacs" in the installation bin/ directory with a link
1147 ** Emacs uses libtinfo in preference to libncurses, if available.
1149 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1150 /usr/pkg/lib to the linker search path. You must add them yourself if
1153 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1154 (from the bin and libexec directories, respectively). The former is
1155 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1158 * Startup Changes in Emacs 24.3
1160 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1161 lisp/ directory. There should not be any there anyway. If you have
1162 been adding them there, put them somewhere else; e.g., site-lisp.
1164 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1167 * Changes in Emacs 24.3
1171 *** `C-h f' (`describe-function') can now perform autoloading.
1172 When this command is called for an autoloaded function whose docstring
1173 contains a key substitution construct, that function's library is
1174 automatically loaded, so that the documentation can be shown
1175 correctly. To disable this, set `help-enable-auto-load' to nil.
1177 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1178 even after their associated libraries have been loaded (and the
1179 autoloads have been redefined as functions).
1183 *** Images displayed via ImageMagick now support transparency and the
1184 :background image specification property.
1186 *** When available, ImageMagick support is automatically enabled.
1187 It is no longer necessary to call `imagemagick-register-types'
1188 explicitly to install ImageMagick image types; that function is called
1189 automatically at startup, or when customizing an imagemagick- option.
1191 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1192 ImageMagick to view images. (You must call `imagemagick-register-types'
1193 afterwards if you do not use customize to change this.)
1195 *** The new variable `imagemagick-enabled-types' also affects which
1196 ImageMagick types are treated as images. The function
1197 `imagemagick-filter-types' returns the list of types that will be
1200 *** ImageMagick images now support the :max-width and :max-height
1203 *** Some data types aren't auto-detected by ImageMagick. Adding
1204 :format to `create-image' may help if the content type is in the
1205 new variable `image-format-suffixes'.
1209 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1210 next and previous path separator, respectively.
1212 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1213 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1214 non-nil before enabling the mode.
1218 *** New option `mode-line-default-help-echo' specifies the help text
1219 (shown in a tooltip or in the echo area) for any part of the mode line
1220 that does not have its own specialized help text.
1222 *** You can now click mouse-3 in the coding system indicator to invoke
1223 `set-buffer-file-coding-system'.
1225 ** Server and client
1227 *** emacsclient now obeys string values for `initial-buffer-choice',
1228 if it is told to open a new frame without specifying any file to visit
1229 or expression to evaluate.
1231 *** New option `server-auth-key' specifies a shared server key.
1233 ** Emacs now generates backtraces on fatal errors.
1234 On encountering a fatal error, Emacs now outputs a textual description
1235 of the fatal signal, and a short backtrace on platforms like glibc
1236 that support backtraces.
1238 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1239 This minor mode replaces `toggle-read-only', which is now obsolete.
1241 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1242 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1243 respectively, without exiting from the prompt.
1245 ** In the Package Menu, newly-available packages are listed as "new",
1246 and sorted above the other "available" packages by default.
1248 ** If your Emacs was built from a bzr checkout, the new variable
1249 `emacs-bzr-version' contains information about the bzr revision used.
1251 ** New option `create-lockfiles' specifies usage of lockfiles.
1252 It defaults to t. Changing it to nil inhibits the creation of lock
1253 files (use this with caution).
1255 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1256 variables on remote hosts.
1258 ** The entry for PCL-CVS has been removed from the Tools menu.
1259 The PCL-CVS commands are still available via the keyboard.
1261 ** Using "unibyte: t" in Lisp source files is obsolete.
1262 Use "coding: raw-text" instead.
1264 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1265 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1266 The previous binding, introduced in Emacs 24.1, was a mistake, because
1267 `C-c LETTER' bindings are reserved for user customizations.
1269 ** Internationalization
1271 *** New language environment: Persian.
1273 *** New input method `vietnamese-vni'.
1275 ** Nextstep (GNUstep / Mac OS X) port
1277 *** Support for fullscreen and the frame parameter fullscreen.
1279 *** A file dialog is used for open/save operations initiated from the
1283 * Editing Changes in Emacs 24.3
1285 ** Search and Replace
1287 *** Non-regexp Isearch now performs "lax" space matching.
1288 Each sequence of spaces in the supplied search string may match any
1289 sequence of one or more whitespace characters, as specified by the
1290 variable `search-whitespace-regexp'. (This variable is also used by a
1291 similar existing feature for regexp Isearch.)
1293 *** New Isearch command `M-s SPC' toggles lax space matching.
1294 This applies to both ordinary and regexp Isearch.
1296 *** New option `replace-lax-whitespace'.
1297 If non-nil, `query-replace' uses flexible whitespace matching too.
1300 *** Global `M-s _' starts a symbol (identifier) incremental search,
1301 and `M-s _' in Isearch toggles symbol search mode.
1302 `M-s c' in Isearch toggles search case-sensitivity.
1304 ** Navigation commands
1306 *** New binding `M-g c' for `goto-char'.
1308 *** New binding `M-g TAB' for `move-to-column'.
1310 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1311 interactively with no prefix arg. Previously, it moved to column 1.
1313 ** New option `yank-handled-properties' allows processing of text
1314 properties on yanked text, in ways that are more general than just
1315 removing them (as is done by `yank-excluded-properties').
1317 ** New option `delete-trailing-lines' specifies whether
1318 M-x delete-trailing-whitespace should delete trailing lines at the end
1319 of the buffer. It defaults to t.
1321 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1323 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1324 `ucs-insert' is now an obsolete alias for `insert-char'.
1326 ** The `z' key no longer has a binding in most special modes.
1327 It used to be bound to `kill-this-buffer', but `z' is too easy to
1330 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1331 It copies the region-rectangle as the last rectangle kill.
1335 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1337 *** New option `register-separator' specifies the register containing
1338 the text to put between collected texts for use with
1339 M-x append-to-register and M-x prepend-to-register.
1342 * Changes in Specialized Modes and Packages in Emacs 24.3
1344 ** Common Lisp emulation (CL)
1346 *** CL's main entry is now (require 'cl-lib).
1347 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1348 i.e., all its definitions have the "cl-" prefix (and internal definitions
1349 use the "cl--" prefix).
1351 If `cl' provided a feature under the name `foo', then `cl-lib'
1352 provides it under the name `cl-foo' instead; with the exceptions of the
1353 few `cl' definitions that had to use `foo*' to avoid conflicts with
1354 pre-existing Elisp entities. These have been renamed to `cl-foo'
1355 rather than `cl-foo*'.
1357 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1358 provide the old, non-prefixed names. Some exceptions are listed below:
1360 *** `cl-flet' is not like `flet' (which is deprecated).
1361 Instead it obeys the behavior of Common-Lisp's `flet'.
1362 In particular, in cl-flet function definitions are lexically scoped,
1363 whereas in flet the scoping is dynamic.
1365 *** `cl-labels' is slightly different from `labels'.
1366 The difference is that it relies on the `lexical-binding' machinery
1367 (as opposed to the `lexical-let' machinery used previously) to capture
1368 definitions in closures, so such closures will only work if `lexical-binding'
1371 *** `cl-letf' is not exactly like `letf'.
1372 The only difference is in details that relate to some deprecated usage
1373 of `symbol-function' in place forms.
1375 *** `progv' was rewritten to use the `let' machinery.
1376 A side effect is that variables without corresponding values are bound
1377 to nil rather than being made unbound.
1379 *** The following methods of extending `setf' are obsolete
1380 (use features from gv.el instead):
1381 `define-modify-macro' (use `gv-letplace')
1382 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1383 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1384 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1388 *** Changes are now highlighted using the same color scheme as in
1389 modern VCSes. Deletions are displayed in red (new faces
1390 `diff-refine-removed' and `smerge-refined-removed', and new definition
1391 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1392 and `smerge-refined-added', and new definition of `diff-added').
1394 *** The variable `diff-use-changed-face' defines whether to use the
1395 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1396 changes in context diffs.
1398 *** The new command `diff-delete-trailing-whitespace' removes trailing
1399 whitespace introduced by a diff.
1401 ** Ediff now uses the same color scheme as Diff mode.
1405 A new version of python.el, which provides several new features, including:
1406 per-buffer shells, better indentation, Python 3 support, and improved
1407 shell-interaction compatible with iPython (and virtually any other
1410 *** Some user options have been replaced/renamed, including (old -> new):
1411 **** python-indent -> python-indent-offset
1412 **** python-guess-indent -> python-indent-guess-indent-offset
1413 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1414 **** python-use-skeletons -> python-skeleton-autoinsert
1416 *** Some user options have been removed, including:
1418 **** `python-indent-string-contents': Strings are never indented.
1420 **** `python-honour-comment-indentation':
1421 Comments are always considered as indentation markers.
1423 **** `python-continuation-offset': Indentation is automatically
1424 calculated in a pep8 compliant way depending on the context.
1426 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1427 Have no direct mapping as the shell interaction is completely different.
1429 **** `python-python-command', `python-jython-command':
1430 Replaced by `python-shell-interpreter'.
1432 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1433 `python-pdbtrack-minor-mode-string', `python-source-modes':
1436 *** Some commands have been replaced (old -> new):
1437 **** python-insert-class -> python-skeleton-class
1438 **** python-insert-def -> python-skeleton-def
1439 **** python-insert-for -> python-skeleton-for
1440 **** python-insert-if -> python-skeleton-if
1441 **** python-insert-try/except -> python-skeleton-try
1442 **** python-insert-try/finally -> python-skeleton-try
1443 **** python-insert-while -> python-skeleton-while
1444 **** python-find-function -> python-nav-jump-to-defun
1445 **** python-next-statement -> python-nav-forward-sentence
1446 **** python-previous-statement -> python-nav-backward-sentence
1447 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1448 **** python-end-of-defun-function -> python-nav-end-of-defun
1449 **** python-send-buffer -> python-shell-send-buffer
1450 **** python-send-defun -> python-shell-send-defun
1451 **** python-send-region -> python-shell-send-region
1452 **** python-send-region-and-go -> emulate with python-shell-send-region
1453 and python-shell-switch-to-shell
1454 **** python-send-string -> python-shell-send-string
1455 **** python-switch-to-python -> python-shell-switch-to-shell
1456 **** python-describe-symbol -> python-eldoc-at-point
1460 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1462 *** The D-Bus object manager interface is implemented.
1464 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1465 if their value does not fit into Emacs's integer range.
1467 *** The function `dbus-call-method' is now non-blocking.
1468 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1470 *** Signals can also be sent as unicast messages.
1472 *** The argument list of `dbus-register-signal' has been extended,
1473 according to the new match rule types of D-Bus.
1475 *** `dbus-init-bus' supports private connections.
1477 *** There is a new function `dbus-setenv'.
1479 ** `desktop-path' no longer includes the "." directory.
1480 Desktop files are now located in ~/.emacs.d by default.
1484 *** `dired-do-async-shell-command' executes each file sequentially
1485 if the command ends in `;' (when operating on multiple files).
1486 Otherwise, it executes the command on each file in parallel.
1488 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1489 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1492 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1493 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1494 mark/unmark/flag all files in the active region.
1496 *** The minibuffer default for `=' (`dired-diff') has changed.
1497 It is now the backup file for the file at point, if one exists.
1498 In Transient Mark mode the default is the file at the active mark.
1500 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1501 The global binding for `M-=', `count-words-region' is in effect.
1505 *** New module "notifications", which can send a notification when you
1506 receive a private message or your nickname is mentioned.
1508 *** ERC will look up server/channel names via auth-source and use any
1511 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1512 only applies to messages sent by lurkers.
1514 ** reStructuredText mode
1516 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1517 fontification, comment handling, and customization have all been revised
1520 *** Support for `imenu' and `which-function-mode'.
1522 *** The reStructuredText syntax is more closely covered.
1523 Sphinx support has been improved.
1525 *** `rst-insert-list' inserts new list or continues existing lists.
1527 *** A negative prefix argument always works for `rst-adjust'.
1529 *** The window configuration is reset after displaying a TOC.
1531 *** The constant `rst-version' describes the rst.el package version.
1535 *** Support for percent literals and recognition of regular expressions
1536 in method calls without parentheses with more methods, including Cucumber
1539 *** Improved syntax highlighting and indentation.
1541 *** New command `ruby-toggle-block', bound to `C-c {'.
1543 *** Some non-standard keybindings/commands have been removed:
1545 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1547 **** `ruby-mark-defun'; use `mark-defun'.
1549 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1550 appropriate settings for the variables `beginning-of-defun-function'
1551 and `end-of-defun-function'.
1553 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1554 `reindent-then-newline-and-indent' and `newline' have been removed.
1556 ** Shell Script mode
1558 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1560 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1562 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1566 *** The free software compiler GHDL is supported (and now the default).
1568 *** Support for the VHDL-AMS packages has been added/updated.
1570 *** Updated to the 2002 revision of the VHDL standard.
1572 *** Accepts \r and \f as whitespace.
1576 *** The faces used by Apropos are now directly customizable.
1577 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1578 see the `apropos' Custom group for details.
1580 *** The old options whose values specified faces to use have been removed
1581 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1585 *** This package has been rewritten to use Tabulated List mode.
1587 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1588 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1592 *** Algebraic simplification mode is now the default.
1593 To restrict to the limited simplifications given by the former
1594 default simplification mode, use `m I'.
1598 *** You can customize the header text that appears above each calendar month.
1599 See the variable `calendar-month-header'.
1601 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1603 *** The calendars produced by cal-html include holidays.
1604 Customize `cal-html-holidays' to change this.
1608 *** The major modes from the parser generators "Bovine" and "Wisent"
1609 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1610 are in `auto-mode-alist', and the corresponding manuals are included.
1614 **** Menu support for the "Configuration" feature. This allows users to
1615 choose the active configuration (such as debug or install) from the menu.
1617 **** New command `ede-set' to interactively set project-local variables.
1619 **** Support for compiling, debugging, and running in "generic" projects.
1621 **** Autoconf editing support for M4 macros with complex arguments.
1623 **** Compilation support for the "linux" project type.
1625 **** "simple" projects have been removed; use "generic" projects instead.
1629 **** Support for parsing #include statements inside a namespace in C/C++.
1631 **** Improved support for 'extern "C"' declarations in C/C++.
1633 **** The ability to ignore more common special C/C++ preprocessor symbols,
1634 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1635 If available, include cdefs.h as an additional source of preprocessor symbols.
1637 **** Improved C/C++ function pointer parsing.
1639 **** In Python, support for converting imports to include file names.
1641 **** Ability to dynamically determine the Python load path.
1643 **** Support for the Python 'WITH' and 'AT' keywords.
1645 **** Improved tooltip completion.
1649 **** The SRecode manual is now included.
1651 **** Tag generation supports constructor/destructor settings and system
1652 include differentiation.
1654 **** Addition of 'Framework' support: Frameworks are specified when a
1655 particular kind of library (such as Android) is needed in a common language
1658 **** Support for nested templates and let variables override based on priority.
1660 **** Support for merging tables from multiple related modes, such as
1661 default -> c++ -> arduino.
1663 ** Compile has a new option `compilation-always-kill'.
1667 *** `custom-reset-button-menu' now defaults to t.
1669 *** Non-option variables are never matched in `customize-apropos' and
1670 `customize-apropos-options' (i.e., the prefix argument does nothing for
1671 these commands now).
1675 *** The variables `term-default-fg-color' and `term-default-bg-color'
1676 are now deprecated in favor of the customizable face `term'.
1678 *** You can customize how to display ANSI terminal colors and styles
1679 by customizing the corresponding `term-color-<COLOR>',
1680 `term-color-underline' and `term-color-bold' faces.
1684 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1686 *** Remote processes are now also supported on remote MS-Windows hosts.
1690 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1691 Previously, this slot stored semicolon-separated attribute-value pairs
1692 appended to some imap URLs, but this is not compatible with RFC 3986.
1693 So now the `filename' slot stores the entire path and query components,
1694 and the `attributes' slot is always nil.
1696 *** New function `url-encode-url' for encoding a URI string.
1697 The `url-retrieve' function now uses this to encode its URL argument,
1698 in case that is not properly encoded.
1700 *** New command `url-cookie-list' displays all the current cookies, and
1701 allows deleting selected cookies.
1703 ** notifications.el supports now version 1.2 of the Notifications API.
1704 The function `notifications-get-capabilities' returns the supported
1707 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1708 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1709 `flymake-warning-bitmap'.
1711 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1712 specifying URL types that should be converted to remote file names at
1713 the FFAP prompt. The default is now '("ftp").
1715 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1716 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1718 ** New option `mouse-avoidance-banish-position' specifies where the
1719 `banish' mouse avoidance setting moves the mouse.
1721 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1722 closing brackets to be aligned with the line of the opening bracket.
1724 ** In Proced mode, new command `proced-renice' renices marked processes.
1726 ** New option `async-shell-command-buffer' specifies the buffer to use
1727 for a new asynchronous `shell-command' when the default output buffer
1728 `*Async Shell Command*' is already in use.
1730 ** SQL mode has a new option `sql-db2-escape-newlines'.
1731 If non-nil, newlines sent to the command interpreter will be escaped
1732 by a backslash. The default does not escape the newlines and assumes
1733 that the sql statement will be terminated by a semicolon.
1735 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1736 (and modes that derive from it), sorts the column at point, or the Nth
1737 column if a numeric prefix argument is given.
1739 ** `which-func-modes' now defaults to t, so Which Function mode, when
1740 enabled, applies to all applicable major modes.
1742 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1745 ** Follow mode no longer works by using advice.
1746 The option `follow-intercept-processes' has been removed.
1748 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1750 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1751 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1752 *** semantic-change-hooks -> semantic-change-functions
1753 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1754 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1755 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1756 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1757 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1758 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1759 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1760 *** rcirc-activity-hooks -> rcirc-activity-functions
1761 *** rcirc-print-hooks -> rcirc-print-functions
1762 *** dbus-event-error-hooks -> dbus-event-error-functions
1763 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1764 *** checkdoc-style-hooks -> checkdoc-style-functions
1765 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1766 *** archive-extract-hooks -> archive-extract-hook
1767 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1768 *** hfy-post-html-hooks -> hfy-post-html-hook
1769 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1770 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1771 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1772 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1774 ** Obsolete packages
1777 In most cases, assoc+member+push+delq work just as well.
1778 And in any case it's just a terrible package: ugly semantics, terrible
1779 inefficiency, and not namespace-clean.
1788 * Incompatible Lisp Changes in Emacs 24.3
1790 ** Docstrings starting with `*' no longer indicate user options.
1791 Only variables defined using `defcustom' are considered user options.
1792 The function `user-variable-p' is now an obsolete alias for
1793 `custom-variable-p'.
1795 ** The return values of `defalias', `defun' and `defmacro' have changed,
1796 and are now undefined. For backwards compatibility, `defun' and
1797 `defmacro' currently return the name of the newly defined
1798 function/macro, but this should not be relied upon.
1800 ** `random' by default now returns a different random sequence in
1801 every Emacs run. Use `(random S)', where S is a string, to set the
1802 random seed to a value based on S, in order to get a repeatable
1803 sequence in later calls.
1805 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1806 that substring is inserted literally even if the LITERAL arg is
1807 non-nil, instead of causing an error to be signaled.
1809 ** `select-window' now always makes the window's buffer current.
1810 It does so even if the window was selected before.
1812 ** The function `x-select-font' can return a font spec, instead of a
1813 font name as a string. Whether it returns a font spec or a font name
1814 depends on the graphical library.
1816 ** `face-spec-set' no longer sets frame-specific attributes when the
1817 third argument is a frame (that usage was obsolete since Emacs 22.2).
1819 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1821 ** The CL package's `get-setf-method' function no longer exists.
1822 Generalized variables are now part of core Emacs Lisp, and implemented
1823 differently to the way cl.el used to do it. It is not possible to
1824 define a compatible replacement for `get-setf-method'. See the file
1825 gv.el for internal details of the new implementation.
1827 ** The arguments of `dbus-register-signal' are no longer just strings,
1828 but keywords or keyword-string pairs. The old argument list will
1829 still be supported for Emacs 24.x.
1831 ** Miscellaneous name changes
1832 Some Lisp symbols have been renamed to correct their spelling,
1833 or to be more consistent with standard Emacs terminology.
1835 *** Renamed functions
1836 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1837 **** inactivate-input-method -> deactivate-input-method
1838 **** quail-inactivate -> quail-deactivate
1839 **** robin-inactivate -> robin-deactivate
1840 **** viper-inactivate-input-method -> viper-deactivate-input-method
1841 **** viper-inactivate-input-method-action ->
1842 viper-deactivate-input-method-action
1843 **** ucs-input-inactivate -> ucs-input-deactivate
1846 The old hooks are still supported for backward compatibility, but they
1847 are deprecated and will be removed eventually.
1848 **** input-method-inactivate-hook -> input-method-deactivate-hook
1849 **** robin-inactivate-hook -> robin-deactivate-hook
1850 **** quail-inactivate-hook -> quail-deactivate-hook
1852 *** Renamed variables
1853 **** follow-deactive-menu -> follow-inactive-menu
1854 **** inactivate-current-input-method-function ->
1855 deactivate-current-input-method-function
1857 ** Some obsolete functions, variables, and faces have been removed:
1858 *** `last-input-char', `last-command-char', `unread-command-char'
1859 *** `facemenu-unlisted-faces'
1860 *** `rmail-decode-mime-charset'
1861 *** `iswitchb-read-buffer'
1862 *** `sc-version', `sc-submit-bug-report'
1863 *** `set-char-table-default'
1864 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1865 *** `compile-internal'
1867 *** `mode-line-inverse-video'
1868 *** `follow-mode-off-hook'
1869 *** `cvs-commit-buffer-require-final-newline'
1870 (use `log-edit-require-final-newline' instead)
1871 *** `cvs-changelog-full-paragraphs'
1872 (use `log-edit-changelog-full-paragraphs' instead)
1873 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1874 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1875 *** `vc-master-templates' (use `vc-handled-backends' instead)
1876 *** `vc-checkout-carefully'
1879 * Lisp Changes in Emacs 24.3
1881 ** CL-style generalized variables are now in core Elisp.
1882 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1883 You can define your own generalized variables using `gv-define-simple-setter',
1884 `gv-define-setter', etc.
1886 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1887 This can significantly speed up execution of non-byte-compiled code,
1888 but can also bump into previously unnoticed cyclic dependencies.
1889 These are generally harmless: they will simply cause the macro calls
1890 to be left for later expansion (as before), but will result in a
1891 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1892 You may wish to restructure your code so this does not happen.
1894 ** New sampling-based Elisp profiler.
1895 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1896 When finished, use M-x profiler-stop. The sampling rate can be based on
1897 CPU time or memory allocations.
1899 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1900 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1902 ** New macros `setq-local' and `defvar-local'.
1904 ** Face underlining can now use a wave.
1906 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1907 of `read-regexp' accepts a string ending with a colon and space, and its
1908 second argument DEFAULTS can be a list of strings accessible via `M-n'
1909 in the minibuffer ahead of other hard-coded useful regexp-related values.
1910 More commands use `read-regexp' now to read their regexp arguments.
1914 *** New function `completion-table-with-quoting' to handle completion
1915 in the presence of quoting, such as file completion in shell buffers.
1917 *** New function `completion-table-subvert' to use an existing completion
1918 table, but with a different prefix.
1922 *** New error type and new function `user-error'.
1923 These do not trigger the debugger.
1925 *** New option `debugger-bury-or-kill', saying what to do with the
1926 debugger buffer when exiting debug.
1928 *** Set `debug-on-message' to enter the debugger when a certain
1929 message is displayed in the echo area. This can be useful when trying
1930 to work out which code is doing something.
1932 *** New var `inhibit-debugger', automatically set to prevent accidental
1933 recursive invocations.
1937 *** New command `fit-frame-to-buffer' adjusts the frame height to
1940 *** The command `fit-window-to-buffer' can adjust the frame height
1941 if the new option `fit-frame-to-buffer' is non-nil.
1943 *** New macro `with-temp-buffer-window', similar to
1944 `with-output-to-temp-buffer'.
1946 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1949 *** New option `switch-to-buffer-preserve-window-point' to restore a
1950 window's point when switching buffers.
1952 *** New display action function `display-buffer-no-window' to not
1953 display the buffer in a window.
1955 *** New display action alist entry `allow-no-window' to indicate the
1956 caller of `display-buffer' is ready to handle the case of not
1957 displaying the buffer in a window.
1959 *** New display action alist entries `window-height' and `window-width'
1960 specify the size of new windows created by `display-buffer'.
1962 *** New display action alist entry `pop-up-frame-parameters', if
1963 non-nil, specifies frame parameters to give any newly-created frame.
1965 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1966 tells display action functions to avoid changing which frame is
1969 *** New display action alist entry `previous-window', if non-nil,
1970 specifies window to reuse in `display-buffer-in-previous-window'.
1972 *** New display action functions `display-buffer-below-selected',
1973 and `display-buffer-in-previous-window'.
1975 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1976 now accept a third argument to avoid choosing the selected window.
1978 *** Additional values recognized for option `window-combination-limit'.
1980 *** The following variables are obsolete, as they can be replaced by
1981 appropriate entries in the `display-buffer-alist' function introduced
1983 **** `dired-shrink-to-fit'
1984 **** `display-buffer-reuse-frames'
1985 **** `display-buffer-function'
1986 **** `special-display-buffer-names'
1987 **** `special-display-frame-alist'
1988 **** `special-display-function'
1989 **** `special-display-regexps'
1993 *** `current-time-string' no longer requires that its argument's year
1994 must be in the range 1000..9999. It now works with any year supported
1995 by the underlying C implementation.
1997 *** `current-time' now returns extended-format time stamps
1998 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1999 PSEC is typically a multiple of 1000 on current machines. Other
2000 functions that use this format, such as `file-attributes' and
2001 `format-time-string', have been changed accordingly. Old-format time
2002 stamps are still accepted.
2004 *** The format of timers in `timer-list' and `timer-idle-list' is now
2005 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2006 The PSECS slot is new, and uses picosecond resolution. It can be
2007 accessed via the new `timer--psecs' accessor.
2009 *** Last-modified time stamps in undo lists now are of the form
2010 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2014 *** Improved security when handling persistent objects:
2016 **** `eieio-persistent-read' now features optional arguments for specifying
2017 the class to load, as well as a flag stating whether subclasses are allowed;
2018 if provided, other classes will be rejected by the reader. For
2019 compatibility with existing code, if the class is omitted only a
2022 **** New specialized reader for pulling in classes and signaling errors
2023 without evaluation of suspicious code.
2025 **** All slots that contain objects must have a :type. Slots with lists
2026 of objects must use a new type predicate for a list of an object type.
2028 *** Support for `find-function' and similar utilities, through the addition
2029 of filename support to generated symbols.
2031 ** Floating point functions now always return special values like NaN,
2032 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2033 Previously, they returned NaNs on some platforms but signaled errors
2034 on others. The affected functions are acos, asin, tan, exp, expt,
2035 log, log10, sqrt, and mod.
2037 ** New fringe bitmap `exclamation-mark'.
2039 ** Miscellaneous changes to special forms and macros
2041 *** `defun' and `defmacro' are now macros rather than special forms.
2043 *** `kbd' is now a function rather than a macro.
2045 ** Miscellaneous new functions
2047 *** `set-temporary-overlay-map' sets up a temporary keymap that
2048 takes precedence over most other maps for a short while (normally one key).
2050 *** `autoloadp' tests if its argument is an autoloaded object.
2052 *** `autoload-do-load' performs the autoloading operation.
2054 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2056 *** `file-name-base' returns a file name sans directory and extension.
2058 *** `function-get' fetches a function property, following aliases.
2060 *** `posnp' tests if an object is a `posn'.
2062 *** `system-users' returns the user names on the system.
2064 *** `system-groups' returns the group names on the system.
2066 *** `tty-top-frame' returns the topmost frame of a text terminal.
2068 ** The following functions and variables are obsolete:
2069 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2070 *** `buffer-has-markers-at'
2071 *** `macro-declaration-function' (use `macro-declarations-alist')
2072 *** `window-system-version' (provides no useful information)
2073 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2074 *** `query-replace-interactive'
2075 *** `font-list-limit' (has had no effect since Emacs < 23)
2078 * Changes in Emacs 24.3 on Non-Free Operating Systems
2080 ** Cygwin builds can use the native MS Windows user interface.
2081 Pass `--with-w32' to configure. The default remains the X11 interface.
2083 ** Two new functions are available in Cygwin builds:
2084 `cygwin-convert-file-name-from-windows' and
2085 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2086 code to access the Cygwin file-name mapping machinery to convert
2087 between Cygwin and Windows-native file and directory names.
2089 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2090 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2091 `mouse-autoselect-window'.
2093 ** On MS Windows Vista and later Emacs now supports symbolic links.
2095 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2096 support for libxml2, even if its presence is detected.
2098 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2100 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2101 directories to the search path. You must add them yourself if you want them.
2104 * Changes in Emacs 24.2
2106 ** This is mainly a bug-fix release.
2109 * Installation Changes in Emacs 24.1
2111 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2112 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2113 also depend on Gtk+. You can disable them with --without-rsvg and
2116 ** Emacs can be compiled with GnuTLS support.
2117 This happens by default if a suitably recent version of the library is
2118 found at build time. To prevent this, use the configure option
2119 `--without-gnutls'. See below for GnuTLS features.
2121 ** Emacs can be compiled with SELinux support.
2122 This happens by default if a suitably recent version of the library is
2123 found at build time. To prevent this, use the configure option
2124 `--without-selinux'. See below for SELinux features.
2126 ** Emacs can be compiled with ImageMagick support.
2127 This happens by default if a suitably recent version of the library is
2128 found at build time. To prevent this, use the configure option
2129 `--without-imagemagick'. See below for ImageMagick features.
2130 This feature is not available for the Nextstep or MS ports.
2132 ** Emacs can be compiled with libxml2 support.
2133 This happens by default if a suitably recent version of the library is
2134 found at build time. To prevent this, use the configure option
2135 `--without-xml2'. See below for libxml2 features.
2137 ** By default, the installed Info and man pages are compressed.
2138 You can disable this by configuring --without-compress-info.
2140 ** New configure option --with-wide-int.
2141 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2142 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2145 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2146 These provide no new functionality, they just remove the need to edit
2147 lib-src/Makefile by hand in order to use the associated features.
2149 ** New configure option --enable-use-lisp-union-type.
2150 This is only useful for Emacs developers to debug certain types of bugs.
2151 This is not a new feature; only the configure flag is new.
2153 ** The standalone programs digest-doc and sorted-doc are removed.
2154 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2156 ** The standalone program `fakemail' is removed.
2157 If you need it, feedmail.el provides a superset of the functionality.
2160 * Startup Changes in Emacs 24.1
2162 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2163 command line arguments, and the EMACS_UNIBYTE environment variable, no
2164 longer have any effect. (They were declared obsolete in Emacs 23.)
2166 ** New command line option `--no-site-lisp' removes site-lisp directories
2167 from load-path. -Q now implies this. This option does not affect the
2168 EMACSLOADPATH environment variable (and hence has no effect for
2172 * Changes in Emacs 24.1
2176 *** Many packages now use the `completion-at-point' command,
2177 rather than implementing separate completion commands.
2179 *** `completion-at-point' now handles tags and semantic completion.
2181 *** Completion in a non-minibuffer now tries to detect the end of completion
2182 and pops down the *Completions* buffer accordingly.
2184 *** New option `completion-cycle-threshold' allows completion cycling.
2186 *** New option `completion-category-overrides' for overriding the
2187 default completion style in certain circumstances.
2189 *** New completion style `substring'.
2191 *** Completion of buffer names uses `substring' completion by default.
2193 *** The option `widget-complete-field' has been removed.
2197 *** The first time you try sending mail, Emacs asks for a mail method.
2198 This is implemented by a new default for `send-mail-function', which
2199 is `sendmail-query-once'. This offers to use the smtpmail package, or
2200 to use the old defaults relying on external mail facilities
2201 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2202 `mailclient-send-it' on Windows).
2204 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2205 transfers the report to your desktop's preferred mail client, if there
2206 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2209 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2210 and Mail mode changes
2212 ** Emacs server and client changes
2214 *** New option `server-port' specifies the port for TCP Emacs servers.
2216 *** New emacsclient argument -q/--quiet suppresses some status messages.
2218 *** New emacsclient argument --frame-parameters specifies the frame
2219 parameters of any newly-created graphical frame.
2221 *** If emacsclient shuts down due to Emacs signaling an error,
2222 its exit status is 1.
2224 *** New emacsclient argument --parent-id ID.
2225 This opens a client frame in parent X window ID, via XEmbed, similar
2226 to the --parent-id argument to Emacs.
2228 ** Internationalization changes
2230 *** Emacs now supports display and editing of bidirectional text.
2231 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2232 displayed in the correct visual order as expected by users of those
2233 scripts. The display reordering is a "full bidirectionality" class
2234 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2235 with no RTL text should look exactly the same as before.
2237 **** New buffer-local variable `bidi-display-reordering'.
2238 To disable display reordering in a buffer, change this to nil.
2240 **** New buffer-local variable `bidi-paragraph-direction'.
2241 If nil (the default), Emacs determines the base direction of each
2242 paragraph from its text, as specified by the UBA. Setting the value
2243 to `right-to-left' or `left-to-right' forces a base direction on each
2246 Paragraphs with right-to-left base direction are displayed starting at
2247 the right window edge.
2249 *** Enhanced support for characters with no glyphs in available fonts,
2250 or, on text terminals, characters that cannot be encoded by the
2251 terminal coding system. The new option `glyphless-char-display-control'
2252 specifies how to display them: as a hexadecimal code in a box, a thin
2253 1-pixel space, an empty box, etc.
2255 *** New input methods for Farsi and Bulgarian
2256 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2258 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2259 (U+2010 and U+2011).
2261 *** New Hebrew translation of the Emacs Tutorial.
2262 Type `C-u C-h t' to choose it in case your language setup doesn't
2263 automatically select it.
2265 ** An Emacs Lisp package manager is now included.
2266 This is a convenient way to download and install additional packages,
2267 from a package repository at http://elpa.gnu.org.
2269 *** M-x list-packages shows a list of packages, which can be
2270 selected for installation.
2272 *** New command `describe-package', bound to `C-h P'.
2274 *** By default, all installed packages are loaded automatically when
2275 Emacs starts up. To disable this, set `package-enable-at-startup' to
2276 nil. To specify the packages to load, customize `package-load-list'.
2278 ** Custom theme changes
2280 *** New command `M-x customize-themes', which provides a convenient
2281 interface for enabling and disabling Custom themes.
2283 *** New option `custom-theme-load-path' is the load path for themes.
2284 Emacs no longer looks for Custom themes in `load-path'. The default
2285 value of `custom-theme-load-path' says to look for themes in
2286 `custom-theme-directory', followed by a subdirectory of
2287 `data-directory' named "themes/", which contains a small selection of
2288 built-in Custom themes.
2290 *** New option `custom-safe-themes' records known-safe theme files.
2291 If a theme is not in this list, Emacs queries before loading it, and
2292 offers to save the theme to `custom-safe-themes' automatically. By
2293 default, all themes included in Emacs are treated as safe.
2295 ** Improved GTK integration
2297 *** GTK scroll-bars are now placed on the right by default.
2298 The function `set-scroll-bar-mode' can change this.
2300 *** GTK tool bars can have just text, just images or images and text.
2301 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2302 the default is taken from desktop settings.
2304 *** GTK tool bars can be placed on any edge of the frame.
2305 The frame-parameter tool-bar-position controls this. It takes the
2306 values top, left, right or bottom. The Options => Show/Hide menu has
2309 *** The default colors for selected text (the `region' face) are taken
2310 from the GTK theme when Emacs is built with GTK.
2312 *** Emacs uses GTK tooltips by default if built with GTK.
2313 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2315 ** Graphical interface changes
2317 *** On graphical displays, the mode-line no longer ends in dashes.
2318 Also, the first dash (which does not indicate anything) is just
2319 displayed as a space.
2321 *** `menu-bar-select-buffer-function' lets you choose another operation
2322 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2324 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2325 built with Xft. These fonts can be set via X resources, for example:
2326 Emacs.pane.menubar.font: Courier-12
2330 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2331 or if it receives a SIGINT signal in batch mode.
2333 *** `kill-emacs-hook' is now also run in batch mode.
2334 Third-party code which adds to `kill-emacs-hook' should check if they
2335 do the right thing in batch mode.
2337 ** Scrolling changes
2339 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2340 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2341 of buffer at first key-press (instead they move to top/bottom of buffer)
2342 when `scroll-error-top-bottom' is non-nil.
2344 *** New option `scroll-error-top-bottom' (see above).
2346 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2347 scroll a line instead of full screen.
2349 *** New property `scroll-command' should be set on a command's symbol to
2350 define it as a scroll command affected by `scroll-preserve-screen-position'.
2352 *** If you customize `scroll-conservatively' to a value greater than 100,
2353 Emacs will never recenter point in the window when it scrolls due to
2354 cursor motion commands or commands that move point (e.f., `M-g M-g').
2355 Previously, you needed to use `most-positive-fixnum' as the value of
2356 `scroll-conservatively' to achieve the same effect.
2358 *** "Aggressive" scrolling now honors the scroll margins.
2359 If you customize `scroll-up-aggressively' or
2360 `scroll-down-aggressively' and move point off the window, Emacs now
2361 scrolls the window so as to avoid positioning point inside the scroll
2364 ** Basic SELinux support has been added.
2365 This requires Emacs to be linked with libselinux at build time.
2367 *** Emacs preserves the SELinux file context when backing up.
2368 Also, the function `copy-file' has an extra optional argument for
2369 preserving SELinux context, and the return value of `backup-buffer'
2370 now includes the SELinux context.
2372 *** New functions `file-selinux-context' and `set-file-selinux-context'
2373 get and set the SELinux context of a file.
2377 *** `delete-by-moving-to-trash' now only affects commands that specify
2378 trashing. This avoids inadvertently trashing temporary files.
2380 *** Calling `delete-file' or `delete-directory' with a prefix argument
2381 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2383 ** File- and directory-local variable changes
2385 *** You can stop directory local vars from applying to subdirectories.
2386 Add an element (subdirs . nil) to the alist portion of any variables
2387 settings to indicate that the section should not apply to
2390 *** Directory local variables can apply to some file-less buffers.
2391 Affected modes include dired, vc-dir, and log-edit. For example,
2392 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2393 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2394 `hack-dir-local-variables-non-file-buffer' to support this.
2396 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2397 Instead, use "eval: (minor-mode 1)".
2399 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2400 to `inhibit-local-variables-regexps'. As the name suggests, it now
2401 applies to ALL file local variables, not just -*- lines. The
2402 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2407 *** The `quit-window' command now restores the last buffer displayed
2408 in the quitted window.
2410 *** Resizing an Emacs frame now preserves proportional window sizes,
2411 modulo restrictions like window minimum sizes and fixed-size windows.
2413 *** The behavior of `display-buffer' is now customizable in detail.
2415 **** New option `display-buffer-base-action' specifies a list of
2416 user-determined display "actions" (functions and optional arguments
2417 for choosing the displaying window).
2419 This takes precedence over the default display action, which is
2420 specified by `display-buffer-fallback-action'.
2422 **** New option `display-buffer-alist' maps buffer name regexps to
2423 display actions, taking precedence over `display-buffer-base-action'.
2425 *** New option `window-combination-limit'.
2426 The new option `window-combination-limit' allows to return the space
2427 obtained for resizing or creating a window more reliably to the window
2428 from which such space was obtained.
2430 *** New option `window-combination-resize'.
2431 The new option `window-combination-resize' allows to split a window that
2432 otherwise cannot be split because it's too small by stealing space from
2433 other windows in the same combination. Subsequent resizing or deletion
2434 of the window will resize all windows in the same combination as well.
2436 *** New option `frame-auto-hide-function' lets you choose between
2437 iconifying or deleting a frame when burying a buffer in a dedicated
2438 frame, or quitting a window showing a buffer in a frame of its own.
2440 *** New commands `maximize-window' and `minimize-window'.
2441 These maximize and minimize the size of a window within its frame.
2443 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2444 These functions allow to navigate through the live buffers that have
2445 been shown in a specific window.
2447 ** Minibuffer changes
2449 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2450 This is handy for minibuffer-only frames, and is also used for the feature
2451 where mouse-1 pops up *Messages*"', which can now easily be changed.
2453 *** Minibuffers set `truncate-lines' to nil.
2454 If you want to change the value to something else, you could use
2455 for example `minibuffer-setup-hook'.
2457 ** `auto-mode-case-fold' is now enabled by default.
2459 ** `backup-by-copying-when-mismatch' now defaults to t.
2461 ** New basic faces `error', `warning', `success'.
2462 These are used to highlight text indicating failure, caution or
2463 successful operation.
2465 ** New option `list-colors-sort' defines the color sort order
2466 for `list-colors-display'.
2468 ** The variable `focus-follows-mouse' now always defaults to nil.
2471 * Editing Changes in Emacs 24.1
2475 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2476 `isearch-yank-line'.
2478 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2479 `isearch-yank-kill'.
2481 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2483 ** New commands `count-words-region' and `count-words'.
2485 *** M-= is bound to `count-words-region', not `count-lines-region'.
2486 The `count-words-region' command, when called interactively, reports
2487 the number of lines, words, and characters in the region. It is a
2488 superset of the old `count-lines-region', which is now an obsolete
2491 ** The command `just-one-space' (M-SPC), if given a negative argument,
2492 also deletes newlines around point.
2496 *** New option `delete-active-region'.
2497 If non-nil, [delete] and DEL delete the region if it is active and no
2498 prefix argument is given. If set to `kill', those commands kill
2501 *** New command `delete-forward-char', bound to [delete].
2502 This is meant for interactive use, and obeys `delete-active-region'.
2503 The command `delete-char' does not obey `delete-active-region'.
2505 *** `delete-backward-char' is now a Lisp function.
2506 Apart from obeying `delete-active-region', its behavior is unchanged.
2507 However, the byte compiler now warns if it is called from Lisp; Lisp
2508 callers should use delete-char with a negative argument instead.
2510 *** The option `mouse-region-delete-keys' has been deleted.
2512 ** Selection changes.
2514 The default handling of clipboard and primary selections has been
2515 changed to conform with modern X applications. In short, most
2516 commands for killing and yanking text now use the clipboard, while
2517 mouse commands use the primary selection.
2519 In the following, we provide a list of these changes, followed by a
2520 list of steps to get the old behavior back if you prefer that.
2522 *** `select-active-regions' now defaults to t.
2523 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2524 the kill ring. The selected text is put in the primary selection, if
2525 the system possesses a separate primary selection facility (e.g. X).
2527 **** `select-active-regions' also accepts a new value, `only'.
2528 This means to only set the primary selection for temporarily active
2529 regions (usually made by mouse-dragging or shift-selection);
2530 "ordinary" active regions, such as those made with C-SPC followed by
2531 point motion, do not alter the primary selection.
2533 **** `mouse-drag-copy-region' now defaults to nil.
2535 *** mouse-2 is now bound to `mouse-yank-primary'.
2536 This pastes from the primary selection, ignoring the kill-ring.
2537 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2539 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2541 *** `x-select-enable-primary' now defaults to nil.
2542 Thus, commands that kill text or copy it to the kill-ring (such as
2543 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2545 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2546 exactly equivalent to M-w, C-w, and C-y respectively.
2548 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2549 non-nil by default, as Windows does not support the primary selection
2550 between applications.
2552 *** To return to the previous behavior, do the following:
2554 **** Change `select-active-regions' to nil.
2555 **** Change `mouse-drag-copy-region' to t.
2556 **** Change `x-select-enable-primary' to t (on X only).
2557 **** Change `x-select-enable-clipboard' to nil.
2558 **** Bind `mouse-yank-at-click' to mouse-2.
2560 *** Support for X cut buffers has been removed.
2562 *** X clipboard managers are now supported.
2563 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2565 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2566 in the current rectangle. With a prefix argument, this prompts for a
2567 number to count from and for a format string.
2569 ** `redisplay-dont-pause' now defaults to t.
2570 This makes Emacs feel more responsive to editing commands that arrive
2571 at high rate, e.g. if you lean on some key, because stopping redisplay
2572 in the middle (when this variable is nil) forces more expensive
2573 updates later on, and Emacs appears to be unable to keep up.
2575 ** The behavior of <TAB> for active regions in Text mode has changed.
2576 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2577 when the region is active causes Emacs to indent all the lines in the
2578 region, aligning them with the line previous to the first line in the
2579 region (or with the left margin if there is no previous line).
2581 ** When `occur' is called with a prefix argument, matching strings are
2582 collected into the `*Occur*' buffer without line numbers. If there
2583 are parenthesized subexpressions in the specified regexp, `occur'
2584 reads replacement text that may contain \\& and \\N whose convention
2585 follows `replace-match'.
2588 * Changes in Specialized Modes and Packages in Emacs 24.1
2590 ** Archive Mode has basic support for browsing and updating 7z archives.
2594 *** BibTeX mode now supports biblatex.
2595 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2596 `bibtex-entry-field-alist' is now an obsolete alias for
2597 `bibtex-BibTeX-entry-alist'.
2599 *** New command `bibtex-search-entries', bound to C-c C-a.
2601 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2603 *** New variable `bibtex-search-entry-globally'.
2607 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2609 *** The default browser used by the package is now the "xdg-open" program,
2610 on platforms that support it. This calls your desktop's preferred browser.
2614 *** Support for musical notes.
2616 *** Support for logarithmic units.
2618 *** No longer uses the tex prefix for TeX specific unit names when
2619 using TeX or LaTeX mode.
2621 *** New option to highlight selections using faces.
2623 *** `calc-histogram' has the option of using a vector to determine the bins.
2625 *** New "O" option prefix.
2627 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2629 ** Calendar, Diary, and Appt
2631 *** Diary entries can contain non-printing "comments".
2632 See the variable `diary-comment-start'.
2634 *** Appointments can specify their individual warning times.
2635 See the variable `appt-warning-time-regexp'.
2637 *** The function specified by `appt-disp-window-function' may be passed
2638 lists of arguments if multiple appointments are due at similar times.
2639 If you are using a custom function for this, you should update it.
2641 *** New function `diary-hebrew-birthday'.
2643 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2644 may no longer be nil, but must all be strings.
2646 *** The obsolete (since Emacs 22.1) method of enabling the appt
2647 package by adding `appt-make-list' to `diary-hook' has been removed.
2648 Use `appt-activate' instead.
2650 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2651 appt-issue-message (use the function appt-activate)
2652 appt-visible/appt-msg-window (use the variable appt-display-format)
2654 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2655 view-diary-entries, list-diary-entries, show-all-diary-entries
2659 *** New feature to "guess" the style in an existing buffer.
2660 The main entry point is M-x c-guess.
2662 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2664 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2665 Thus C-M-a will, by default, go to the beginning of the immediate function,
2668 *** "Macros with semicolons" can be registered for correct indentation.
2669 Where such a macro ends a line (no semicolon) the next statement is no longer
2670 parsed as a statement continuation.
2672 ** Comint and modes derived from it use the standard completion code.
2676 *** Compilation mode can be used without Font Lock mode.
2677 `compilation-parse-errors-function' is now obsolete.
2679 *** New variable `compilation-filter-start', which is bound while
2680 `compilation-filter-hook' runs. It records the start position of the
2681 text inserted by `compilation-filter'.
2683 *** `compilation-error-screen-columns' and `compilation-first-column'
2684 are obeyed in the editing buffer. So programming language modes can
2685 set them, whereas previously only the value in the *Compilation*
2690 *** Customize buffers now contain a search field.
2691 The search is performed using `customize-apropos'.
2692 To turn off the search field, set `custom-search-field' to nil.
2694 *** Options in customize group buffers start out hidden if not customized.
2695 Use the arrow to the left of the option name to toggle visibility.
2697 *** custom-buffer-sort-alphabetically now defaults to t.
2699 *** The color widget now has a "Choose" button, which allows you to
2700 choose a color via `list-colors-display'.
2704 *** It is now possible to access buses other than the default system
2707 *** The `dbus-register-method' and `dbus-register-property' functions
2708 optionally do not register names.
2710 *** The new function `dbus-register-service' registers a known service
2711 name on a D-Bus without also registering a property or a method.
2715 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2716 if called with a prefix argument, read a file name from the minibuffer
2717 instead of using the current buffer.
2719 *** The "dired local variables" feature of Dired-x is obsolete.
2720 The standard directory local variables feature replaces it.
2724 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2725 controlling attempts to autojoin a channel.
2727 *** New variable `erc-coding-system-precedence': If we use `undecided'
2728 as the server coding system, this variable will then be consulted.
2729 The default is to decode strings that can be decoded as utf-8 as
2730 utf-8, and do the normal `undecided' decoding for the rest.
2734 *** The default value of `eshell-directory-name' has changed
2735 to be an "eshell" directory in `user-emacs-directory'.
2736 The old "~/.eshell/" directory is still used if it exists, though.
2740 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2741 It now supports multithread non-stop debugging and simultaneous
2742 debugging of several threads.
2746 *** RET (`image-toggle-animation') toggles animation, if applicable.
2747 Animation plays once, unless the option `image-animate-loop' is non-nil.
2751 *** New command M-x info-display-manual displays a named Info manual.
2752 If that manual is already visited in some Info buffer, it displays
2753 that buffer. (This is handy if you have many manuals in many *info*
2754 buffers, and don't remember the name of the buffer visiting the manual
2755 you want to consult.) Otherwise, it loads and displays the manual.
2757 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2758 This is for compatibility with the stand-alone Info reader program,
2759 and also because `Info-edit' is a rarely used command that is disabled
2762 ** Mail mode changes (not Message mode)
2764 *** New command M-x mail-add-attachment for adding MIME attachments
2766 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2767 (Its name is misleading, since it has nothing to do with MIME
2768 attachments.) The old name is now an obsolete alias to the new name.
2770 ** MH-E has been updated to MH-E version 8.3.1.
2771 See MH-E-NEWS for details.
2773 ** Modula-2 mode provides auto-indentation.
2775 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2777 ** nXML mode no longer binds C-RET to `nxml-complete'.
2778 Completion is now performed via `completion-at-point', bound to C-M-i
2779 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2780 default), this performs tag completion.
2782 ** Org mode has been updated to version 7.8.09.
2783 See ORG-NEWS for details.
2785 ** Prolog mode has been completely revamped, with lots of additional
2786 functionality such as more intelligent indentation, electricity,
2787 support for more variants, including Mercury, and a lot more.
2791 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2792 in the Rmail incoming message.
2794 *** The variable `rmail-message-filter' no longer has any effect.
2795 This change was made in Emacs 23.1 but was not advertised at the time.
2796 Try using `rmail-show-message-hook' instead.
2800 *** M-x shell prompts for the shell path name if the default directory
2801 is a remote file name and neither the environment variable $ESHELL nor
2802 the variable `explicit-shell-file-name' is set.
2804 *** TAB is now bound to the standard `completion-at-point' command,
2805 which now implements the pcomplete rules for shell command completion.
2809 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2810 if the mail server supports them. This uses either built-in GnuTLS
2811 support, or the starttls.el library. Customize `smtpmail-stream-type'
2814 *** The variable `smtpmail-auth-credentials' has been removed.
2815 By default, the information is now stored in the file ~/.authinfo.
2816 This was the default value of smtpmail-auth-credentials. If you had
2817 customized smtpmail-auth-credentials to a list of user names and
2818 passwords, those settings are not used. During your first connection
2819 to the smtp server, Emacs will prompt for the user name and password,
2820 and offer to save them to ~/.authinfo. Or you can manually copy the
2821 credentials to ~/.authinfo. For example, if you had
2823 (setq smtpmail-auth-credentials
2824 '(("mail.example.org" 25 "jim" "s!cret")))
2826 then the equivalent line in ~/.authinfo would be
2828 machine mail.example.org port 25 login jim password s!cret
2830 See the auth-source manual for more information, e.g. on encrypting
2831 the credentials file.
2833 *** The variable `smtpmail-starttls-credentials' has been removed.
2834 If you had that set, you need to put
2836 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2838 in your ~/.authinfo file instead.
2840 *** SMTPmail defaults to using the address in the From: header as the
2841 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2842 to the address you wish to use instead.
2846 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2847 and `sql-oracle-scan-on'.
2849 *** New options controlling prompting for login parameters.
2850 Each supported product has a custom variable `sql-*-login-params',
2851 which is a list of the parameters to be prompted for before a
2852 connection is established.
2854 *** The command `sql-product-interactive' now takes a prefix argument,
2855 which causes it to prompt for an SQL product.
2857 *** Product-specific SQL interactive commands now take prefix arguments.
2858 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2859 given a prefix argument, prompt for a name for the SQL interactive
2860 buffer. This reduces the need for calling `sql-rename-buffer'.
2862 *** SQL interactive modes suppress command continuation prompts, and
2863 replace tabs with spaces. The first change impacts multiple line SQL
2864 statements entered with C-j between each line, statements yanked into
2865 the buffer and statements sent with `sql-send-*' functions. The
2866 second prevents the MySQL and Postgres interpreters from listing
2867 object name completions when sent text via `sql-send-*' functions.
2869 *** New command `sql-connect' starts a predefined SQLi session,
2870 using the login parameters from `sql-connection-alist'.
2872 *** New "Save Connection" menu item in SQLi buffers.
2873 This gathers the login params specified for the SQLi session, if it
2874 was not started by a connection, and saves them as a new connection.
2876 *** New commands for listing database objects and details:
2877 sql-list-all and sql-list-table.
2879 *** An API for manipulating SQL product definitions has been added.
2883 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2887 *** New inline access method "ksu" (kerberized su).
2889 *** The following access methods are discontinued: "ssh1_old",
2890 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2892 *** The user option `remote-file-name-inhibit-cache' controls whether
2893 remote file attributes are cached for better performance.
2895 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2896 default value to "".
2898 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2899 for remote machines which support SELinux.
2901 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2902 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2903 the degree of parallelism.
2905 ** VC and related modes
2907 *** Support for pulling on distributed version control systems.
2908 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2909 supported (currently with Bzr, Git, and Mercurial), to update the
2910 current branch and working tree. A prefix argument means to prompt
2911 the user for specifics, e.g. a pull location.
2913 *** `vc-update' is now an alias for `vc-pull'.
2915 *** Support for merging on distributed version control systems.
2916 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2917 is supported (currently with Bzr, Git, and Mercurial), to merge
2918 changes from another branch into the current one. It prompts for
2919 specifics, e.g. a merge source.
2921 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2922 shows a diff while querying the user. It defaults to t.
2924 *** Log entries in some Log View buffers can be toggled to display a
2925 longer description by typing RET (log-view-toggle-entry-display).
2926 This is currently supported for Bzr, Git, and Mercurial (to support
2927 another backend, define a `log-view-expanded-log-entry-function').
2928 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2929 use this to display the full log entry for the revision at point.
2931 *** New command `vc-ediff' allows visual comparison of two revisions
2932 of a file similar to `vc-diff', but using ediff backend.
2934 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2935 this was not advertised at the time.
2937 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2938 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2939 this was not advertised at the time.
2945 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2947 *** partial-completion-mode (complete.el) is obsolete.
2948 You can get a comparable behavior with:
2949 (setq completion-styles '(partial-completion initials))
2950 (setq completion-pcm-complete-word-inserts-delimiters t)
2952 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2954 *** pgg is obsolete (use EasyPG instead).
2956 *** sregex.el is obsolete, since rx.el is a strict superset.
2958 *** s-region.el and pc-select.el are obsolete.
2959 They are superseded by shift-select-mode, enabled by default since 23.1.
2961 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2965 *** The Landmark game is now invoked with `landmark', not `lm'.
2966 Its functions and variables have been similarly renamed.
2968 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2969 (This interfered with cua-mode.)
2971 *** f90.el has some support for Fortran 2008 syntax.
2973 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2975 *** New command `nato-region' converts text to NATO phonetic alphabet.
2978 * New Modes and Packages in Emacs 24.1
2980 ** Occur Edit mode applies edits made in *Occur* buffers to the
2981 original buffers. It is bound to "e" in Occur mode.
2983 ** New global minor mode electric-pair-mode.
2984 When enabled, typing an open parenthesis automatically inserts the
2985 matching closing one.
2987 ** New global minor mode electric-indent-mode.
2988 When enabled, typing certain characters triggers reindentation.
2989 Major modes wishing to use this can set electric-indent-chars or
2990 electric-indent-functions.
2992 ** New global minor mode electric-layout-mode.
2993 When enabled, typing certain characters automatically inserts newlines.
2994 Major modes wishing to use this can set electric-layout-rules.
2996 ** tabulated-list.el provides a generic major mode for tabulated data,
2997 from which other modes can be derived.
2999 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3001 ** secrets.el is an implementation of the Secret Service API, an
3002 interface to password managers like GNOME Keyring or KDE Wallet. The
3003 Secret Service API requires D-Bus for communication. The command
3004 `secrets-show-secrets' offers a buffer with a visualization of the
3007 ** notifications.el provides an implementation of the Desktop
3008 Notifications API. It requires D-Bus for communication.
3010 ** soap-client.el supports access to SOAP web services from Emacs.
3011 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3013 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3015 ** New emacs-lock.el package.
3016 The previous version has been moved to obsolete/old-emacs-lock.el.
3017 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3018 against exiting Emacs and killing the buffer can be set separately.
3019 The mechanism for automatically turning off protection for buffers
3020 with dead inferior processes has been generalized.
3023 * Incompatible Lisp Changes in Emacs 24.1
3025 ** Passing a nil argument to a minor mode function call now ENABLES
3026 the minor mode unconditionally. This is so that you can write e.g.
3028 (add-hook 'text-mode-hook 'foo-mode)
3030 to enable foo-mode in Text mode buffers, removing the need for
3031 `turn-on-foo-mode' style functions. This affects all mode commands
3032 defined by `define-minor-mode'. If called interactively, the mode
3033 command still toggles the minor mode.
3035 ** The return value of `backup-buffer' has changed.
3036 It is now a list of three elements, where the second element is a list
3037 describing the original file's SELinux context. If Emacs or the
3038 system lacks SELinux support, the context list is (nil nil nil nil).
3039 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3041 ** `char-direction-table' and the `char-direction' function were deleted.
3042 They were buggy and inferior to the new support of bidirectional
3043 editing introduced in Emacs 24. If you need the bidirectional
3044 properties of a character, use `get-char-code-property' with the last
3045 argument `bidi-class'.
3047 ** `copy-directory' now copies the source directory as a subdirectory
3048 of the target directory, if the latter is an existing directory. The
3049 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3050 the contents directly into a pre-existing target directory.
3052 ** For mouse click input events in the text area, the Y pixel
3053 coordinate in the POSITION list now counts from the top of the text
3054 area, excluding any header line. Previously, it counted from the top
3057 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3058 been further reduced. Now a backquote not followed by a space is
3059 always treated as a "new-style" backquote. Please remove all
3060 "old-style" backquotes from your code. If your code uses backquotes
3061 as documented in the Elisp manual, and compiles without warning, then
3062 you have nothing to do in this regard. Code not following the
3063 appropriate conventions may fail to compile.
3065 The most common cause of trouble seems to be an old-style backquote
3066 followed by a newline. Another cause of trouble is vector notation
3067 for key sequence notation: instead of [(control ,)] and [(control ')],
3068 you should write [(control ?,)] and [(control ?')], which will work in
3071 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3072 was not advertised at the time. The function `custom-initialize-delay'
3073 replaced all known uses.
3075 ** `view-buffer' now treats special mode-class in the same way that
3076 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3077 major mode is special).
3079 ** Menu and tool bar changes
3081 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3082 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3083 With these alist entries omitted, `make-frame' checks the value of the
3084 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3085 a menu-bar or tool-bar, respectively. If the alist entries are added,
3086 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3088 *** The menu bar bindings's caches are not used any more.
3089 Use (where-is-internal <def> nil t) instead.
3091 ** Regions created by mouse dragging are now normal active regions,
3092 similar to those created by shift-selection (see Selection changes
3093 above). In previous Emacs versions, these regions were delineated by
3094 `mouse-drag-overlay'; that variable has been removed.
3096 ** The fourth argument of `filter-buffer-substring' has been removed.
3097 If you want to remove text properties from the final result, simply
3098 pass the result through substring-no-properties.
3100 ** cl.el no longer provides `cl-19'.
3102 ** The following obsolete functions and aliases have been removed
3103 (the appropriate new function is given in parentheses; "not needed"
3104 means you can just remove all calls to the function in question):
3106 *** `comint-kill-output' (`comint-delete-output')
3107 *** `decompose-composite-char' (`char-to-string')
3108 *** `outline-visible' (`outline-invisible-p')
3109 *** `internal-find-face' (`facep')
3110 *** `internal-get-face' (`facep and check-face')
3111 *** `frame-update-faces' (not needed)
3112 *** `frame-update-face-colors' (`frame-set-background-mode')
3113 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3114 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3115 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3116 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3117 *** `x-make-font-unbold' (`make-face-unbold')
3118 *** `x-make-font-unitalic' (`make-face-unitalic')
3119 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3120 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3121 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3122 *** `char-bytes' (== 1)
3123 *** `isearch-return-char' (`isearch-printing-char')
3124 *** `make-local-hook' (not needed)
3125 *** `set-screen-height' (`set-frame-height')
3126 *** `set-screen-width' (`set-frame-width')
3128 ** The following obsolete variables and varaliases have been removed
3129 (the appropriate new variable is given in parentheses):
3131 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3132 *** `vc-header-alist' (`vc-BACKEND-header')
3133 *** `directory-sep-char' (== ?/)
3134 *** `font-lock-defaults-alist' (`font-lock-defaults')
3135 *** `e' (`float-e').
3137 ** The following obsolete files were removed:
3138 sc.el, x-menu.el, rnews.el, rnewspost.el
3140 ** The format of the finder-inf.el file has changed, since the Finder
3141 mechanism is now based on the package system. The variable
3142 `finder-package-info' is replaced by `package--builtins' and
3143 `finder-keywords-hash'.
3145 ** When generating autoloads, `update-directory-autoloads' no longer
3146 assumes every inspected file is in your `load-path'. It instead
3147 generates relative names according to the current `load-path'.
3150 * Lisp Changes in Emacs 24.1
3152 ** Code can now use lexical scoping by default instead of dynamic scoping.
3153 The `lexical-binding' variable enables lexical scoping for local
3154 variables. It is typically set via a file-local variable in the first
3155 line of the file, in which case it applies to all the code in that
3158 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3159 binding instead of the old dynamic binding mode.
3161 *** Lexically scoped interpreted functions are represented with a new form
3162 of function value which looks like (closure ENV ARGS &rest BODY).
3164 *** New macro `letrec' to define recursive local functions.
3166 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3167 So do `defcustom' and other forms that call `defvar' as a subroutine.
3169 *** New function `special-variable-p' to check whether a variable is
3170 declared as dynamically bound.
3172 *** The form ((lambda ...) ...) is deprecated.
3174 ** An Emacs Lisp testing tool is now included.
3175 Emacs Lisp developers can use this tool to write automated tests for
3176 their code. See the ERT info manual for details.
3178 ** Changes for bidirectional display and editing
3180 *** New function `current-bidi-paragraph-direction'.
3181 This returns the base direction of the paragraph at point.
3183 *** New function `bidi-string-mark-left-to-right'.
3184 Given a string containing characters from right-to-left scripts, this
3185 function returns another string which can be safely inserted into a
3186 buffer, such that any following text will be always displayed to the
3187 right of that string. (This works by appending an invisible Unicode
3188 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3190 This is useful when the buffer has overall left-to-right paragraph
3191 direction and you need to insert a string whose contents are not known
3192 in advance, without disrupting the layout of the line.
3196 *** Window tree functions are accessible in Elisp.
3197 Functions are provided to return the parent, siblings or child windows
3198 of any window including internal windows (windows not associated with a
3199 buffer) in the window tree.
3201 **** New function `window-valid-p' gives non-nil for live and internal
3204 **** Window manipulation can deal with internal windows.
3205 Many window handling functions like `split-window', `delete-window', or
3206 `delete-other-windows' as well as the window resizing functions can now
3207 act on any window including internal ones.
3209 *** window-total-height/-width vs window-body-height/-width.
3210 The function `window-height' has been renamed to `window-total-height'
3211 and `window-width' has been renamed to `window-body-width'. The old
3212 names are provided as aliases. Two new functions `window-total-width'
3213 and `window-body-height' are provided.
3215 *** Window parameters specific to window handling functions.
3216 For each window you can specify a parameter to override the default
3217 behavior of a number of functions like `split-window', `delete-window'
3218 and `delete-other-windows'. The variable `ignore-window-parameters'
3219 allows to ignore processing such parameters.
3221 *** New semantics of third argument of `split-window'.
3222 The third argument of `split-window' has been renamed to SIDE and can be
3223 set to any of the values 'below, 'right, 'above, or 'left to make the
3224 new window appear on the corresponding side of the window that shall be
3225 split. Any other value of SIDE will cause `split-window' to split the
3226 window into two side-by-side windows as before.
3228 *** Window resizing functions.
3229 A new standard function for resizing windows called `window-resize' has
3230 been introduced. This and all other functions for resizing windows no
3231 longer delete any windows when they become too small.
3233 *** Deleting the selected window now selects the most recently selected
3234 live window on that frame instead.
3236 *** `adjust-window-trailing-edge' adjustments.
3237 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3238 is able to resize other windows if a window adjacent to the trailing
3239 edge cannot be shrunk any more. This makes its behavior more similar to
3240 that of Emacs 21 without compromising, however, its inability to delete
3241 windows which was introduced in Emacs 22.
3243 *** Window-local buffer lists.
3244 Windows now have local buffer lists. This means that removing a buffer
3245 from display in a window will preferably show the buffer previously
3246 shown in that window with its previous window-start and window-point
3247 positions. This also means that the same buffer may be automatically
3248 shown twice even if it already appears in another window.
3250 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3251 which if non-nil requires the buffer to be displayed in the currently
3252 selected window, signaling an error otherwise. If nil, another window
3253 can be used, e.g. if the selected one is strongly dedicated.
3255 *** `split-window-vertically' and `split-window-horizontally' renamed
3256 to `split-window-below' and `split-window-right' respectively.
3257 The old names are kept as aliases.
3261 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3262 named ACTION, and takes a display action of the same form as
3263 `display-buffer-base-action' (see Changes, above). A non-nil,
3264 non-list value is treated specially, as the old meaning.
3266 **** New variable `display-buffer-overriding-action'.
3268 **** The procedure of `display-buffer' etc. to choose a window is
3269 determined by combining `display-buffer-overriding-action',
3270 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3271 and `display-buffer-fallback-action'. The second and fourth of these
3272 are user-customizable variables.
3274 See the docstring of `display-buffer' for details.
3276 *** New functions `window-state-get' and `window-state-put'.
3277 These functions allow to save and restore the state of an arbitrary
3278 frame or window as an Elisp object.
3282 *** New variable `completion-extra-properties' used to specify extra
3283 properties of the current completion:
3284 - :annotate-function, same as the old completion-annotate-function.
3285 - :exit-function, function to call after completion took place.
3287 *** Functions on `completion-at-point-functions' can return any of the
3288 properties valid for `completion-extra-properties'.
3290 *** `completion-annotate-function' is obsolete.
3292 *** New `metadata' method for completion tables. The metadata thus returned
3293 can specify various details of the data returned by `all-completions':
3294 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3295 used to select a style in completion-category-overrides.
3296 - `annotation-function' to add annotations in *Completions*.
3297 - `display-sort-function' to specify how to sort entries in *Completions*.
3298 - `cycle-sort-function' to specify how to sort entries when cycling.
3300 *** `minibuffer-local-filename-must-match-map' is not used any more.
3301 Instead, the bindings in `minibuffer-local-filename-completion-map'
3302 are combined with `minibuffer-local-must-match-map'.
3304 *** New variable `completing-read-function' allows overriding the
3305 behavior of `completing-read'.
3307 ** `glyphless-char-display' can now distinguish between graphical and
3308 text terminal display, via a char-table entry that is a cons cell.
3310 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3311 Instead, the offending function is removed.
3315 *** New function `run-hook-wrapped' for running an abnormal hook by
3316 passing the hook functions as arguments to a "wrapping" function.
3317 Like `run-hook-with-args-until-success', it stops at the first
3318 non-nil return value.
3320 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3321 set of "wrapping" filters, similar to around advice.
3322 (A version of this macro was actually added in Emacs 23.2 but was not
3323 advertised at the time.)
3327 *** New macro `condition-case-unless-debug' (this was actually added in
3328 Emacs 23.1 as condition-case-no-debug, but not advertised)
3330 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3332 *** Variable `stack-trace-on-error' removed.
3334 *** The debugger can now "continue" from an error, which means it will
3335 jump to the error handler as if the debugger had not been invoked
3336 instead of jumping all the way to the top-level.
3338 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3339 This can be useful when `inhibit-quit' is set.
3341 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3342 named Emacs server instances.
3344 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3345 to redirect STDOUT to a file.
3347 ** The function `format-time-string' now supports the %N directive,
3348 for higher-resolution time stamps.
3350 ** New input reading functions
3352 *** New function `read-char-choice' reads a restricted set of
3353 characters, discarding any inputs not inside the set.
3355 *** The command `read-color' now requires a match for a color name
3356 or RGB triplet, instead of signaling an error if the user provides
3359 **** `facemenu-read-color' is now an alias for `read-color'.
3361 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3362 The variable is now used to load all kind of supported dynamic libraries,
3363 not just image libraries. The previous name is still available as an
3366 ** Syntax parsing changes
3368 *** New variable `syntax-propertize-function'.
3369 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3370 This allows syntax-table properties to be set independently from font-lock:
3371 just call syntax-propertize to make sure the text is propertized.
3372 Together with this new variable come a new hook
3373 syntax-propertize-extend-region-functions, as well as two helper functions:
3374 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3375 as-is; and syntax-propertize-rules which provides a new way to specify
3378 *** Syntax tables support a new "comment style c" additionally to style b.
3380 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3382 ** frame-local variables cannot be let-bound any more.
3384 ** Major and minor mode changes
3386 *** `set-auto-mode' now respects mode: local variables at the end of files,
3387 as well as those in the -*- line.
3389 *** `prog-mode' is a new major mode from which programming modes
3392 **** `prog-mode-hook' can be used to enable features for programming
3393 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3394 on-the-fly spell checking for comments and strings.
3396 **** New minor modes `prettify-symbols-mode' and
3397 `global-prettify-symbols-mode' let the user enable symbol
3398 prettification (replacing a string like "lambda" with the Greek lambda
3401 *** New hook `change-major-mode-after-body-hook', run by
3402 `run-mode-hooks' just before any other mode hooks.
3404 *** Enabled globalized minor modes can be disabled in specific major modes.
3405 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3406 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3408 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3410 ** File-handling changes
3412 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3413 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3414 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3415 argument is supplied (see Trash changes, above).
3417 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3419 ** Tool-bars can display separators.
3420 Tool-bar separators are handled like menu separators in menu-bar maps,
3421 i.e. via menu entries of the form `(menu-item "--")'.
3425 *** Animated images support (currently animated gifs only).
3427 **** `image-animated-p' returns non-nil if an image can be animated.
3429 **** `image-animate' animates a supplied image spec.
3431 **** `image-animate-timer' returns the timer object for an image that
3434 *** `image-extension-data' has been renamed to `image-metadata'.
3435 The old name is an obsolete alias to the new one.
3437 *** Image mode can view any image type that ImageMagick supports.
3438 This requires Emacs to be built with ImageMagick support.
3440 **** New function `imagemagick-types', defined if ImageMagick support
3441 is enabled, returns a list of image file extensions that your
3442 ImageMagick installation supports.
3444 **** New function `imagemagick-register-types' enables ImageMagick
3445 image types in Image mode and in `create-image' and other helper
3448 **** New option `imagemagick-types-inhibit' excludes certain
3449 ImageMagick image types from `imagemagick-register-types'.
3451 **** With ImageMagick support, there are extra Image mode commands to
3452 resize and rotate images: `image-transform-fit-to-height',
3453 `image-transform-fit-to-width', `image-transform-set-rotation', and
3454 `image-transform-set-scale'.
3456 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3457 passes it to the mail user agent function. This argument specifies an
3458 action for returning to the caller after finishing with the mail. For
3459 example, this is used by Rmail to optionally delete a mail window.
3461 ** XML and HTML parsing
3462 If Emacs is compiled with libxml2 support, there are two new
3463 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3464 and `libxml-parse-xml-region' (which parses XML). Both return an
3465 Emacs Lisp parse tree.
3467 ** Networking and encryption changes
3469 *** `open-network-stream' can now be used to open an encrypted stream.
3470 It now accepts an optional `:type' parameter for initiating a TLS
3471 connection, directly or via STARTTLS. To do STARTTLS, additional
3472 parameters (`:end-of-command', `:success', `:capabilities-command')
3473 must also be supplied.
3475 *** New library gnutls.el.
3476 The new function `gnutls-available-p' returns non-nil if Emacs is
3477 built with GnuTLS support. The main entry points are
3478 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3479 these functions through `open-network-stream', because that can
3480 upgrade connections through STARTTLS opportunistically or use plain
3481 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3484 *** New primitive `secure-hash' that supports many secure hash algorithms:
3485 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3486 sha1.el has been removed. The `sha1' feature is provided by default.
3490 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3492 ** Progress reporters can now "spin".
3493 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3494 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3495 time you call `progress-reporter-update' on that progress reporter,
3496 with a nil or omitted VALUE argument, the reporter message is
3497 displayed with a "spinning bar".
3499 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3500 being reverted, even if the buffer has a local `revert-buffer-function'.
3502 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3503 If delayed-warnings-list is non-nil, the command loop calls
3504 `delayed-warnings-hook' after `post-command-hook'. At present, this
3505 is only used by Emacs on some platforms to display warnings during
3506 startup, which might otherwise not be noticed. This uses the
3507 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3509 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3511 ** New function `make-composed-keymap' that constructs a new keymap
3512 from multiple input maps. You can use this to make a keymap that
3513 inherits from multiple maps, eg:
3514 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3516 ** New function `string-prefix-p'.
3517 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3519 ** New reader macro ## that stands for the empty symbol.
3520 This means that the empty symbol can now be read back. Also, #: by itself
3521 (when not immediately followed by a possible symbol character) stands for
3522 an empty uninterned symbol.
3524 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3526 ** The following functions and variables are obsolete:
3528 *** `tooltip-use-echo-area' is obsolete.
3529 Rather than setting this to t, disable Tooltip mode instead.
3531 *** buffer-substring-filters is obsolete.
3532 Use `filter-buffer-substring-functions' instead.
3534 *** `byte-compile-disable-print-circle' is obsolete.
3536 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3537 Use `post-command-hook' instead.
3539 *** `font-lock-maximum-size' is obsolete.
3542 * Changes in Emacs 24.1 on Non-Free Operating Systems
3544 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3545 and also when HOME is set to C:\ by default.
3547 ** New configure.bat options
3549 *** --enable-checking builds Emacs with extra runtime checks.
3551 *** --distfiles specifies files to be included in binary distribution.
3553 *** --without-gnutls disables automatic GnuTLS detection.
3555 *** --lib for general library linkage, works with the USER_LIBS build variable.
3557 ** New make target `dist' to create binary distribution for MS Windows.
3559 ** The Lisp function `w32-default-color-map' is now obsolete.
3560 (It is only used internally in the Emacs C code.)
3562 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3563 reappear on mouse-over. (Requires OS X 10.6 or later.)
3565 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3566 other platforms, rather than inserting its contents into the buffer.
3569 ----------------------------------------------------------------------
3570 This file is part of GNU Emacs.
3572 GNU Emacs is free software: you can redistribute it and/or modify
3573 it under the terms of the GNU General Public License as published by
3574 the Free Software Foundation, either version 3 of the License, or
3575 (at your option) any later version.
3577 GNU Emacs is distributed in the hope that it will be useful,
3578 but WITHOUT ANY WARRANTY; without even the implied warranty of
3579 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3580 GNU General Public License for more details.
3582 You should have received a copy of the GNU General Public License
3583 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3588 paragraph-separate: "[
\f]*$"