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'.
719 *** Better indentation of multiple-variable declarations.
720 If declaration spans several lines, variables on the following lines
721 are lined up to the first one.
723 *** We now recognize and better indent continuations in array
726 *** New option `js-switch-indent-offset`.
729 * New Modes and Packages in Emacs 24.4
731 ** New `superword-mode' in subword.el
732 `superword-mode' overrides the default word motion commands to treat
733 symbol_words as a single word, similar to what `subword-mode' does and
734 using the same internal functions.
736 ** New nadvice.el package offering lighter-weight advice facilities.
738 - add-function/remove-function which can be used to add/remove code on any
739 function-carrying place, such as process-filters or `<foo>-function' hooks.
740 - advice-add/advice-remove to add/remove a piece of advice on a named function,
741 much like `defadvice' does.
743 ** New frameset.el package.
744 It provides a set of operations to save a frameset (the state of all
745 or a subset of the existing frames and windows, somewhat similar to a
746 frame configuration), both in-session and persistently, and restore it
747 at some point in the future.
750 ** The package filenotify.el provides an interface for file system
751 notifications. It requires, that Emacs is compiled with one of the
752 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
755 * Incompatible Lisp Changes in Emacs 24.4
757 ** `kill-region' lost its `yank-handler' optional argument.
759 ** `(input-pending-p)' no longer runs other timers which are ready to
760 run. The new optional CHECK-TIMERS param allows for the prior behavior.
762 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
764 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
765 Some languages match those as »...« and others as «...» so better stay neutral.
767 ** The default file coding for Emacs Lisp files is now utf-8.
768 (See file-coding-system-alist.) In most cases, this change is transparent, but
769 files that contain unusual characters without specifying an explicit coding
770 system may fail to load with obscure errors.
771 You should either convert them to utf-8 or add an explicit `coding:' cookie.
773 ** overriding-terminal-local-map does not replace the local keymaps any more.
774 It used to disable the minor mode, major mode, and text-property keymaps,
775 whereas now it simply has higher precedence.
777 ** Default process filters and sentinels are not nil any more.
778 Instead they default to a function which does what the nil value used to do.
780 ** `read-event' does not return decoded chars in ttys any more.
781 Just as was the case in Emacs-22 and before, decoding of tty input according to
782 keyboard-coding-system is not performed in read-event any more. But contrary
783 to that past, it is still done before input-decode-map/function-key-map/...
785 ** Removed inhibit-local-menu-bar-menus.
787 ** frame-local variables that affect redisplay do not work any more.
788 More specifically, the redisplay does not bother to check for a frame-local
789 value when looking up variables.
791 ** nil and "unbound" are indistinguishable in symbol-function.
792 `symbol-function' never signals `void-function' any more.
793 `fboundp' returns non-nil if the symbol was `fset' to nil.
795 ** `defadvice' does not honor the `freeze' flag and cannot advise
796 special-forms any more.
798 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
799 VAR was bound to nil which was not tremendously useful and just lead to
800 spurious warnings about an unused var.
802 ** The return value of `backup-buffer' has changed.
803 The second argument is no longer an SELinux context, instead it is an
804 alist of extended attributes as returned by the new function
805 `file-extended-attributes'. The attributes can be applied to another
806 file using `set-file-extended-attributes'.
808 ** `visited-file-modtime' now returns -1 for nonexistent files.
809 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
810 in the presence of files with negative time stamps.
812 ** The cars of the elements in `interpreter-mode-alist' are now treated
813 as regexps rather than literal strings. Technically this is an
814 incompatible change, but unless you are using interpreter-mode-alist
815 for something (not just adding elements to it), it ought not to affect you.
818 * Lisp Changes in Emacs 24.4
820 ** New option `load-prefer-newer', if non-nil, means that when both
821 .el and .elc versions of a file exist, rather than `load' always
822 choosing the .elc version, it will choose whichever is newer
823 (unless you explicitly specify one or the other).
825 ** New function get-pos-property.
827 ** New hook `pre-redisplay-function'.
830 ** Functions that pop up menus and dialogs now work on all terminal types,
832 This includes `x-popup-menu', `x-popup-dialog', `message-box',
835 The function `display-popup-menus-p' will now return non-nil for a
836 display or frame whenever a mouse is supported on that display or
839 ** New bool-vector set operation functions:
840 *** `bool-vector-exclusive-or'
841 *** `bool-vector-union'
842 *** `bool-vector-intersection'
843 *** `bool-vector-set-difference'
844 *** `bool-vector-not'
845 *** `bool-vector-subsetp'
846 *** `bool-vector-count-consecutive'
847 *** `bool-vector-count-population'
849 ** Comparison functions =, <, >, <=, >= now take many arguments.
851 ** The second argument of `eval' can now be a lexical-environment.
853 ** `with-demoted-errors' takes an additional argument `format'.
855 ** New function `define-error'.
857 ** New hook `tty-setup-hook'.
860 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
862 ** New library helpers.el for misc helper functions
863 *** `hash-table-keys'
864 *** `hash-table-values'
869 *** `string-trim-left'
870 *** `string-trim-right'
873 ** Obsoleted functions:
876 *** `lisp-complete-symbol'
878 *** `minibuffer-completion-contents'
879 *** `isearch-nonincremental-exit-minibuffer'
880 *** `isearch-filter-visible'
881 *** `generic-make-keywords-list'
883 ** `with-wrapper-hook' is obsoleted by `add-function'.
884 The few hooks that used with-wrapper-hook are replaced as follows:
885 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
886 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
887 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
889 ** `byte-compile-interactive-only-functions' is now obsolete.
890 It has been replaced by the symbol property 'interactive-only.
892 ** `split-string' now takes an optional argument TRIM.
893 The value, if non-nil, is a regexp that specifies what to trim from
894 the start and end of each substring.
896 ** New function `string-suffix-p'.
898 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
900 ** Support for filesystem notifications.
901 Emacs now supports notifications of filesystem changes, such as
902 creation, modification, and deletion of files. This requires the
903 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
904 MS-Windows systems, this is supported for Windows XP and newer
907 ** Changes in autorevert.el
910 *** If Emacs is compiled with file notification support, notifications
911 are used instead of checking the time stamp of the files. You can
912 disable this by setting the user option `auto-revert-use-notify' to
913 nil. Alternatively, a regular expression of directories to be
914 excluded from file notifications can be specified by
915 `auto-revert-notify-exclude-dir-regexp'.
918 *** The new user option `auto-revert-remote-files' enables reversion
919 of remote files when set to non-nil.
923 *** The function `face-spec-set' is now analogous to `setq' for face specs.
924 Its third arg now accepts values specifying exactly which face spec to
925 set (defface, custom, or user spec), and it directly sets the relevant
926 property using the supplied face spec.
928 *** Face specs set via Custom themes now replace the `defface' spec
929 rather than inheriting from it (as do face specs set via Customize).
931 *** New face characteristic (supports :underline (:style wave))
932 specifies whether or not the terminal can display a wavy line.
934 *** New face spec attribute :distant-foreground
935 specifies foreground to use if background color is near the foreground
936 color that would otherwise have been used.
941 *** `image-animated-p' is now `image-multi-frame-p'.
942 It returns non-nil for any image that contains multiple frames,
943 whether or not it specifies a frame delay.
946 *** When animating images that do not specify a frame delay,
947 Emacs uses `image-default-frame-delay'.
950 *** New functions `image-current-frame' and `image-show-frame' for getting
951 and setting the current frame of a multi-frame image.
953 *** You can change the speed of animated images.
957 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
958 **** object-name -> eieio-object-name
959 **** object-class -> eieio-object-class
960 **** object-class-fast -> eieio--object-class
961 **** object-name-string -> eieio-object-name-string
962 **** object-num-slots -> eieio--object-num-slots
963 **** object-set-name-string -> eieio-object-set-name-string
964 **** class-parent -> eieio-class-parent
965 **** class-parents -> eieio-class-parents
966 **** class-children -> eieio-class-children
967 **** class-num-slots -> eieio--class-num-slots
968 **** class-precedence-list -> eieio-class-precedence-list
969 **** All generated class-* and object-* field accessors are now
970 prefixed with `eieio-' as well.
972 *** Obsoleted functions:
974 **** class-direct-subclasses
975 **** class-direct-superclasses
977 ** Changes in encoding and decoding of text
980 *** New coding-system `prefer-utf-8'.
981 This is like `undecided' but prefers UTF-8 on decoding if the text to
982 be decoded does not contain any invalid UTF-8 sequences. On encoding,
983 any non-ASCII characters are automatically encoded as UTF-8.
986 *** New attributes of coding-systems whose type is `undecided'.
987 Two new attributes, `:inhibit-null-byte-detection' and
988 `:inhibit-iso-escape-detection', determine how to detect encoding of
989 text that includes null bytes and ISO-2022 escape sequences,
990 respectively. Each of these attributes can be either nil, zero, or
991 t. If it is t, decoding text ignores null bytes and, respectively,
992 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
993 with no-conversion and ISO-2022 sequences cause Emacs to assume the
994 text is encoded in one of the ISO-2022 encodings, such as
995 iso-2022-7bit. If the value is zero, Emacs consults the variables
996 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
998 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
999 UTF-8 encoding and decoding, whenever possible.
1001 These attributes are only meaningful for coding-systems of type
1002 `undecided'. (The type of a coding-system is determined by its
1003 `:coding-type' attribute and can be accessed by calling the
1004 `coding-system-type' function.)
1006 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
1007 with the same interpretation as the returned value of `visited-file-modtime'.
1009 ** time-to-seconds is not obsolete any more.
1010 ** New functions special-form-p and macrop.
1011 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1012 text-property on the first char.
1014 ** The `defalias-fset-function' property lets you catch calls to defalias
1015 and redirect them to your own function instead of `fset'.
1017 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1018 When you edit DIR/FILE, Emacs normally creates a symbolic link
1019 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1020 is being edited. Formerly, if there was already a non-symlink file
1021 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1022 through DIR/.#FILE.9. These fallbacks have been removed, so that
1023 Emacs now no longer locks DIR/FILE in that case.
1025 On file systems that do not support symbolic links, the lock is now a
1026 regular file with contents being what would have been in the symlink.
1028 ** The 9th element returned by `file-attributes' is now unspecified.
1029 Formerly, it was t if the file's gid would change if file were deleted
1030 and recreated. This value has been inaccurate for years on many
1031 platforms, and nobody seems to have noticed or cared.
1033 ** The function `file-ownership-preserved-p' now has an optional
1034 argument GROUP which causes it check for file group too. This can be
1035 used in place of the 9th element of `file-attributes'.
1037 ** New functions `group-gid' and `group-real-gid'.
1039 ** The 6th argument to `copy-file' has been renamed to
1040 `preserve-extended-attributes' as it now handles both SELinux context
1043 ** The `common-substring' argument of display-completion-list is obsolete.
1044 Either use `completion-all-completions' which already returns highlighted
1045 strings (including for partial or substring completion) or call
1046 `completion-hilit-commonality' to add the highlight.
1048 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1050 *** The package descriptor and name of global variables, constants,
1051 and functions should be separated by two hyphens if the symbol is not
1052 meant to be used by other packages.
1055 * Changes in Emacs 24.4 on Non-Free Operating Systems
1057 ** The procedure for building Emacs on MS-Windows has changed.
1058 It is now built by running the same configure script as on all other
1059 platforms. This requires the MSYS environment and MinGW development
1060 tools. See the updated instructions in nt/INSTALL for details.
1062 Using the Posix configure script and Makefile's also means a change in
1063 the directory structure of the Emacs installation on Windows. It is
1064 now the same as on GNU and Unix systems. In particular, the auxiliary
1065 programs, such as cmdproxy.exe and hexl.exe, are in
1066 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1067 version), version-independent site-lisp is in share/emacs/site-lisp,
1068 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1069 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1070 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1071 directories and will find the files in there automatically; there's no
1072 need to set any variables due to this change.)
1075 ** Emacs on Windows 2000 and later can now access files and directories
1076 whose names cannot be encoded in the current system codepage.
1078 The new variable `w32-unicode-filenames' controls this feature: if it
1079 is t, Emacs uses Unicode APIs to pass file names to system calls,
1080 which lifts the limitation of file names to the current locale.
1083 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1084 The backtrace is written to the 'emacs_backtrace.txt' file in the
1085 directory where Emacs was running.
1088 ** The variable `buffer-file-type' is no longer supported.
1089 Setting it has no effect, and %t in the mode-line format is ignored.
1090 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1091 modifying it has no effect.
1094 ** Lock files now work on MS-Windows.
1095 This allows to avoid losing your edits if the same file is being
1096 edited in another Emacs session or by another user. See the node
1097 "Interlocking" in the Emacs User Manual for the details. To disable
1098 file locking, customize `create-lockfiles' to nil.
1100 ** Improved fullscreen support on Mac OS X.
1101 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1102 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1103 native is the default.
1106 * Installation Changes in Emacs 24.3
1108 ** The default X toolkit is now Gtk+ version 3.
1109 If you don't pass `--with-x-toolkit' to configure, or if you use
1110 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1111 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1112 You can explicitly require a specific version by passing
1113 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1115 ** New configure option `--enable-link-time-optimization', to utilize
1116 an appropriate feature provided by GCC since version 4.5.0.
1118 ** New configure option `--without-all' to disable most of the optional
1119 features (image support, etc.) that are normally enabled by default.
1121 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1122 Emacs). If building with GCC, this enables compile-time checks that
1123 warn/give errors about possibly-questionable C code. On a recent GNU
1124 system there should be no warnings; on older and on non-GNU systems
1125 the results may be useful to developers.
1127 ** The configure option `--enable-use-lisp-union-type' has been
1128 renamed to `--enable-check-lisp-object-type', as the resulting
1129 Lisp_Object type no longer uses a union to implement the compile time
1130 check that this option enables.
1132 ** The configure option `--disable-maintainer-mode' has been removed,
1133 as it was confusingly-named and rarely useful.
1135 ** The configure options `--program-prefix', `--program-suffix', and
1136 `--program-transform-name' apply to more than just the installed
1137 binaries. Now they also affect the man pages, icons, and the
1138 etc/emacs.desktop file; but not the info pages, since this would break
1139 links between the various manuals.
1141 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1142 overwriting "emacs" in the installation bin/ directory with a link
1145 ** Emacs uses libtinfo in preference to libncurses, if available.
1147 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1148 /usr/pkg/lib to the linker search path. You must add them yourself if
1151 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1152 (from the bin and libexec directories, respectively). The former is
1153 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1156 * Startup Changes in Emacs 24.3
1158 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1159 lisp/ directory. There should not be any there anyway. If you have
1160 been adding them there, put them somewhere else; e.g., site-lisp.
1162 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1165 * Changes in Emacs 24.3
1169 *** `C-h f' (`describe-function') can now perform autoloading.
1170 When this command is called for an autoloaded function whose docstring
1171 contains a key substitution construct, that function's library is
1172 automatically loaded, so that the documentation can be shown
1173 correctly. To disable this, set `help-enable-auto-load' to nil.
1175 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1176 even after their associated libraries have been loaded (and the
1177 autoloads have been redefined as functions).
1181 *** Images displayed via ImageMagick now support transparency and the
1182 :background image specification property.
1184 *** When available, ImageMagick support is automatically enabled.
1185 It is no longer necessary to call `imagemagick-register-types'
1186 explicitly to install ImageMagick image types; that function is called
1187 automatically at startup, or when customizing an imagemagick- option.
1189 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1190 ImageMagick to view images. (You must call `imagemagick-register-types'
1191 afterwards if you do not use customize to change this.)
1193 *** The new variable `imagemagick-enabled-types' also affects which
1194 ImageMagick types are treated as images. The function
1195 `imagemagick-filter-types' returns the list of types that will be
1198 *** ImageMagick images now support the :max-width and :max-height
1201 *** Some data types aren't auto-detected by ImageMagick. Adding
1202 :format to `create-image' may help if the content type is in the
1203 new variable `image-format-suffixes'.
1207 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1208 next and previous path separator, respectively.
1210 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1211 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1212 non-nil before enabling the mode.
1216 *** New option `mode-line-default-help-echo' specifies the help text
1217 (shown in a tooltip or in the echo area) for any part of the mode line
1218 that does not have its own specialized help text.
1220 *** You can now click mouse-3 in the coding system indicator to invoke
1221 `set-buffer-file-coding-system'.
1223 ** Server and client
1225 *** emacsclient now obeys string values for `initial-buffer-choice',
1226 if it is told to open a new frame without specifying any file to visit
1227 or expression to evaluate.
1229 *** New option `server-auth-key' specifies a shared server key.
1231 ** Emacs now generates backtraces on fatal errors.
1232 On encountering a fatal error, Emacs now outputs a textual description
1233 of the fatal signal, and a short backtrace on platforms like glibc
1234 that support backtraces.
1236 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1237 This minor mode replaces `toggle-read-only', which is now obsolete.
1239 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1240 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1241 respectively, without exiting from the prompt.
1243 ** In the Package Menu, newly-available packages are listed as "new",
1244 and sorted above the other "available" packages by default.
1246 ** If your Emacs was built from a bzr checkout, the new variable
1247 `emacs-bzr-version' contains information about the bzr revision used.
1249 ** New option `create-lockfiles' specifies usage of lockfiles.
1250 It defaults to t. Changing it to nil inhibits the creation of lock
1251 files (use this with caution).
1253 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1254 variables on remote hosts.
1256 ** The entry for PCL-CVS has been removed from the Tools menu.
1257 The PCL-CVS commands are still available via the keyboard.
1259 ** Using "unibyte: t" in Lisp source files is obsolete.
1260 Use "coding: raw-text" instead.
1262 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1263 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1264 The previous binding, introduced in Emacs 24.1, was a mistake, because
1265 `C-c LETTER' bindings are reserved for user customizations.
1267 ** Internationalization
1269 *** New language environment: Persian.
1271 *** New input method `vietnamese-vni'.
1273 ** Nextstep (GNUstep / Mac OS X) port
1275 *** Support for fullscreen and the frame parameter fullscreen.
1277 *** A file dialog is used for open/save operations initiated from the
1281 * Editing Changes in Emacs 24.3
1283 ** Search and Replace
1285 *** Non-regexp Isearch now performs "lax" space matching.
1286 Each sequence of spaces in the supplied search string may match any
1287 sequence of one or more whitespace characters, as specified by the
1288 variable `search-whitespace-regexp'. (This variable is also used by a
1289 similar existing feature for regexp Isearch.)
1291 *** New Isearch command `M-s SPC' toggles lax space matching.
1292 This applies to both ordinary and regexp Isearch.
1294 *** New option `replace-lax-whitespace'.
1295 If non-nil, `query-replace' uses flexible whitespace matching too.
1298 *** Global `M-s _' starts a symbol (identifier) incremental search,
1299 and `M-s _' in Isearch toggles symbol search mode.
1300 `M-s c' in Isearch toggles search case-sensitivity.
1302 ** Navigation commands
1304 *** New binding `M-g c' for `goto-char'.
1306 *** New binding `M-g TAB' for `move-to-column'.
1308 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1309 interactively with no prefix arg. Previously, it moved to column 1.
1311 ** New option `yank-handled-properties' allows processing of text
1312 properties on yanked text, in ways that are more general than just
1313 removing them (as is done by `yank-excluded-properties').
1315 ** New option `delete-trailing-lines' specifies whether
1316 M-x delete-trailing-whitespace should delete trailing lines at the end
1317 of the buffer. It defaults to t.
1319 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1321 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1322 `ucs-insert' is now an obsolete alias for `insert-char'.
1324 ** The `z' key no longer has a binding in most special modes.
1325 It used to be bound to `kill-this-buffer', but `z' is too easy to
1328 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1329 It copies the region-rectangle as the last rectangle kill.
1333 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1335 *** New option `register-separator' specifies the register containing
1336 the text to put between collected texts for use with
1337 M-x append-to-register and M-x prepend-to-register.
1340 * Changes in Specialized Modes and Packages in Emacs 24.3
1342 ** Common Lisp emulation (CL)
1344 *** CL's main entry is now (require 'cl-lib).
1345 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1346 i.e., all its definitions have the "cl-" prefix (and internal definitions
1347 use the "cl--" prefix).
1349 If `cl' provided a feature under the name `foo', then `cl-lib'
1350 provides it under the name `cl-foo' instead; with the exceptions of the
1351 few `cl' definitions that had to use `foo*' to avoid conflicts with
1352 pre-existing Elisp entities. These have been renamed to `cl-foo'
1353 rather than `cl-foo*'.
1355 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1356 provide the old, non-prefixed names. Some exceptions are listed below:
1358 *** `cl-flet' is not like `flet' (which is deprecated).
1359 Instead it obeys the behavior of Common-Lisp's `flet'.
1360 In particular, in cl-flet function definitions are lexically scoped,
1361 whereas in flet the scoping is dynamic.
1363 *** `cl-labels' is slightly different from `labels'.
1364 The difference is that it relies on the `lexical-binding' machinery
1365 (as opposed to the `lexical-let' machinery used previously) to capture
1366 definitions in closures, so such closures will only work if `lexical-binding'
1369 *** `cl-letf' is not exactly like `letf'.
1370 The only difference is in details that relate to some deprecated usage
1371 of `symbol-function' in place forms.
1373 *** `progv' was rewritten to use the `let' machinery.
1374 A side effect is that variables without corresponding values are bound
1375 to nil rather than being made unbound.
1377 *** The following methods of extending `setf' are obsolete
1378 (use features from gv.el instead):
1379 `define-modify-macro' (use `gv-letplace')
1380 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1381 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1382 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1386 *** Changes are now highlighted using the same color scheme as in
1387 modern VCSes. Deletions are displayed in red (new faces
1388 `diff-refine-removed' and `smerge-refined-removed', and new definition
1389 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1390 and `smerge-refined-added', and new definition of `diff-added').
1392 *** The variable `diff-use-changed-face' defines whether to use the
1393 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1394 changes in context diffs.
1396 *** The new command `diff-delete-trailing-whitespace' removes trailing
1397 whitespace introduced by a diff.
1399 ** Ediff now uses the same color scheme as Diff mode.
1403 A new version of python.el, which provides several new features, including:
1404 per-buffer shells, better indentation, Python 3 support, and improved
1405 shell-interaction compatible with iPython (and virtually any other
1408 *** Some user options have been replaced/renamed, including (old -> new):
1409 **** python-indent -> python-indent-offset
1410 **** python-guess-indent -> python-indent-guess-indent-offset
1411 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1412 **** python-use-skeletons -> python-skeleton-autoinsert
1414 *** Some user options have been removed, including:
1416 **** `python-indent-string-contents': Strings are never indented.
1418 **** `python-honour-comment-indentation':
1419 Comments are always considered as indentation markers.
1421 **** `python-continuation-offset': Indentation is automatically
1422 calculated in a pep8 compliant way depending on the context.
1424 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1425 Have no direct mapping as the shell interaction is completely different.
1427 **** `python-python-command', `python-jython-command':
1428 Replaced by `python-shell-interpreter'.
1430 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1431 `python-pdbtrack-minor-mode-string', `python-source-modes':
1434 *** Some commands have been replaced (old -> new):
1435 **** python-insert-class -> python-skeleton-class
1436 **** python-insert-def -> python-skeleton-def
1437 **** python-insert-for -> python-skeleton-for
1438 **** python-insert-if -> python-skeleton-if
1439 **** python-insert-try/except -> python-skeleton-try
1440 **** python-insert-try/finally -> python-skeleton-try
1441 **** python-insert-while -> python-skeleton-while
1442 **** python-find-function -> python-nav-jump-to-defun
1443 **** python-next-statement -> python-nav-forward-sentence
1444 **** python-previous-statement -> python-nav-backward-sentence
1445 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1446 **** python-end-of-defun-function -> python-nav-end-of-defun
1447 **** python-send-buffer -> python-shell-send-buffer
1448 **** python-send-defun -> python-shell-send-defun
1449 **** python-send-region -> python-shell-send-region
1450 **** python-send-region-and-go -> emulate with python-shell-send-region
1451 and python-shell-switch-to-shell
1452 **** python-send-string -> python-shell-send-string
1453 **** python-switch-to-python -> python-shell-switch-to-shell
1454 **** python-describe-symbol -> python-eldoc-at-point
1458 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1460 *** The D-Bus object manager interface is implemented.
1462 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1463 if their value does not fit into Emacs's integer range.
1465 *** The function `dbus-call-method' is now non-blocking.
1466 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1468 *** Signals can also be sent as unicast messages.
1470 *** The argument list of `dbus-register-signal' has been extended,
1471 according to the new match rule types of D-Bus.
1473 *** `dbus-init-bus' supports private connections.
1475 *** There is a new function `dbus-setenv'.
1477 ** `desktop-path' no longer includes the "." directory.
1478 Desktop files are now located in ~/.emacs.d by default.
1482 *** `dired-do-async-shell-command' executes each file sequentially
1483 if the command ends in `;' (when operating on multiple files).
1484 Otherwise, it executes the command on each file in parallel.
1486 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1487 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1490 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1491 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1492 mark/unmark/flag all files in the active region.
1494 *** The minibuffer default for `=' (`dired-diff') has changed.
1495 It is now the backup file for the file at point, if one exists.
1496 In Transient Mark mode the default is the file at the active mark.
1498 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1499 The global binding for `M-=', `count-words-region' is in effect.
1503 *** New module "notifications", which can send a notification when you
1504 receive a private message or your nickname is mentioned.
1506 *** ERC will look up server/channel names via auth-source and use any
1509 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1510 only applies to messages sent by lurkers.
1512 ** reStructuredText mode
1514 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1515 fontification, comment handling, and customization have all been revised
1518 *** Support for `imenu' and `which-function-mode'.
1520 *** The reStructuredText syntax is more closely covered.
1521 Sphinx support has been improved.
1523 *** `rst-insert-list' inserts new list or continues existing lists.
1525 *** A negative prefix argument always works for `rst-adjust'.
1527 *** The window configuration is reset after displaying a TOC.
1529 *** The constant `rst-version' describes the rst.el package version.
1533 *** Support for percent literals and recognition of regular expressions
1534 in method calls without parentheses with more methods, including Cucumber
1537 *** Improved syntax highlighting and indentation.
1539 *** New command `ruby-toggle-block', bound to `C-c {'.
1541 *** Some non-standard keybindings/commands have been removed:
1543 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1545 **** `ruby-mark-defun'; use `mark-defun'.
1547 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1548 appropriate settings for the variables `beginning-of-defun-function'
1549 and `end-of-defun-function'.
1551 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1552 `reindent-then-newline-and-indent' and `newline' have been removed.
1554 ** Shell Script mode
1556 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1558 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1560 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1564 *** The free software compiler GHDL is supported (and now the default).
1566 *** Support for the VHDL-AMS packages has been added/updated.
1568 *** Updated to the 2002 revision of the VHDL standard.
1570 *** Accepts \r and \f as whitespace.
1574 *** The faces used by Apropos are now directly customizable.
1575 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1576 see the `apropos' Custom group for details.
1578 *** The old options whose values specified faces to use have been removed
1579 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1583 *** This package has been rewritten to use Tabulated List mode.
1585 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1586 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1590 *** Algebraic simplification mode is now the default.
1591 To restrict to the limited simplifications given by the former
1592 default simplification mode, use `m I'.
1596 *** You can customize the header text that appears above each calendar month.
1597 See the variable `calendar-month-header'.
1599 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1601 *** The calendars produced by cal-html include holidays.
1602 Customize `cal-html-holidays' to change this.
1606 *** The major modes from the parser generators "Bovine" and "Wisent"
1607 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1608 are in `auto-mode-alist', and the corresponding manuals are included.
1612 **** Menu support for the "Configuration" feature. This allows users to
1613 choose the active configuration (such as debug or install) from the menu.
1615 **** New command `ede-set' to interactively set project-local variables.
1617 **** Support for compiling, debugging, and running in "generic" projects.
1619 **** Autoconf editing support for M4 macros with complex arguments.
1621 **** Compilation support for the "linux" project type.
1623 **** "simple" projects have been removed; use "generic" projects instead.
1627 **** Support for parsing #include statements inside a namespace in C/C++.
1629 **** Improved support for 'extern "C"' declarations in C/C++.
1631 **** The ability to ignore more common special C/C++ preprocessor symbols,
1632 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1633 If available, include cdefs.h as an additional source of preprocessor symbols.
1635 **** Improved C/C++ function pointer parsing.
1637 **** In Python, support for converting imports to include file names.
1639 **** Ability to dynamically determine the Python load path.
1641 **** Support for the Python 'WITH' and 'AT' keywords.
1643 **** Improved tooltip completion.
1647 **** The SRecode manual is now included.
1649 **** Tag generation supports constructor/destructor settings and system
1650 include differentiation.
1652 **** Addition of 'Framework' support: Frameworks are specified when a
1653 particular kind of library (such as Android) is needed in a common language
1656 **** Support for nested templates and let variables override based on priority.
1658 **** Support for merging tables from multiple related modes, such as
1659 default -> c++ -> arduino.
1661 ** Compile has a new option `compilation-always-kill'.
1665 *** `custom-reset-button-menu' now defaults to t.
1667 *** Non-option variables are never matched in `customize-apropos' and
1668 `customize-apropos-options' (i.e., the prefix argument does nothing for
1669 these commands now).
1673 *** The variables `term-default-fg-color' and `term-default-bg-color'
1674 are now deprecated in favor of the customizable face `term'.
1676 *** You can customize how to display ANSI terminal colors and styles
1677 by customizing the corresponding `term-color-<COLOR>',
1678 `term-color-underline' and `term-color-bold' faces.
1682 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1684 *** Remote processes are now also supported on remote MS-Windows hosts.
1688 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1689 Previously, this slot stored semicolon-separated attribute-value pairs
1690 appended to some imap URLs, but this is not compatible with RFC 3986.
1691 So now the `filename' slot stores the entire path and query components,
1692 and the `attributes' slot is always nil.
1694 *** New function `url-encode-url' for encoding a URI string.
1695 The `url-retrieve' function now uses this to encode its URL argument,
1696 in case that is not properly encoded.
1698 *** New command `url-cookie-list' displays all the current cookies, and
1699 allows deleting selected cookies.
1701 ** notifications.el supports now version 1.2 of the Notifications API.
1702 The function `notifications-get-capabilities' returns the supported
1705 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1706 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1707 `flymake-warning-bitmap'.
1709 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1710 specifying URL types that should be converted to remote file names at
1711 the FFAP prompt. The default is now '("ftp").
1713 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1714 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1716 ** New option `mouse-avoidance-banish-position' specifies where the
1717 `banish' mouse avoidance setting moves the mouse.
1719 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1720 closing brackets to be aligned with the line of the opening bracket.
1722 ** In Proced mode, new command `proced-renice' renices marked processes.
1724 ** New option `async-shell-command-buffer' specifies the buffer to use
1725 for a new asynchronous `shell-command' when the default output buffer
1726 `*Async Shell Command*' is already in use.
1728 ** SQL mode has a new option `sql-db2-escape-newlines'.
1729 If non-nil, newlines sent to the command interpreter will be escaped
1730 by a backslash. The default does not escape the newlines and assumes
1731 that the sql statement will be terminated by a semicolon.
1733 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1734 (and modes that derive from it), sorts the column at point, or the Nth
1735 column if a numeric prefix argument is given.
1737 ** `which-func-modes' now defaults to t, so Which Function mode, when
1738 enabled, applies to all applicable major modes.
1740 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1743 ** Follow mode no longer works by using advice.
1744 The option `follow-intercept-processes' has been removed.
1746 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1748 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1749 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1750 *** semantic-change-hooks -> semantic-change-functions
1751 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1752 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1753 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1754 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1755 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1756 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1757 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1758 *** rcirc-activity-hooks -> rcirc-activity-functions
1759 *** rcirc-print-hooks -> rcirc-print-functions
1760 *** dbus-event-error-hooks -> dbus-event-error-functions
1761 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1762 *** checkdoc-style-hooks -> checkdoc-style-functions
1763 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1764 *** archive-extract-hooks -> archive-extract-hook
1765 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1766 *** hfy-post-html-hooks -> hfy-post-html-hook
1767 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1768 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1769 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1770 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1772 ** Obsolete packages
1775 In most cases, assoc+member+push+delq work just as well.
1776 And in any case it's just a terrible package: ugly semantics, terrible
1777 inefficiency, and not namespace-clean.
1786 * Incompatible Lisp Changes in Emacs 24.3
1788 ** Docstrings starting with `*' no longer indicate user options.
1789 Only variables defined using `defcustom' are considered user options.
1790 The function `user-variable-p' is now an obsolete alias for
1791 `custom-variable-p'.
1793 ** The return values of `defalias', `defun' and `defmacro' have changed,
1794 and are now undefined. For backwards compatibility, `defun' and
1795 `defmacro' currently return the name of the newly defined
1796 function/macro, but this should not be relied upon.
1798 ** `random' by default now returns a different random sequence in
1799 every Emacs run. Use `(random S)', where S is a string, to set the
1800 random seed to a value based on S, in order to get a repeatable
1801 sequence in later calls.
1803 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1804 that substring is inserted literally even if the LITERAL arg is
1805 non-nil, instead of causing an error to be signaled.
1807 ** `select-window' now always makes the window's buffer current.
1808 It does so even if the window was selected before.
1810 ** The function `x-select-font' can return a font spec, instead of a
1811 font name as a string. Whether it returns a font spec or a font name
1812 depends on the graphical library.
1814 ** `face-spec-set' no longer sets frame-specific attributes when the
1815 third argument is a frame (that usage was obsolete since Emacs 22.2).
1817 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1819 ** The CL package's `get-setf-method' function no longer exists.
1820 Generalized variables are now part of core Emacs Lisp, and implemented
1821 differently to the way cl.el used to do it. It is not possible to
1822 define a compatible replacement for `get-setf-method'. See the file
1823 gv.el for internal details of the new implementation.
1825 ** The arguments of `dbus-register-signal' are no longer just strings,
1826 but keywords or keyword-string pairs. The old argument list will
1827 still be supported for Emacs 24.x.
1829 ** Miscellaneous name changes
1830 Some Lisp symbols have been renamed to correct their spelling,
1831 or to be more consistent with standard Emacs terminology.
1833 *** Renamed functions
1834 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1835 **** inactivate-input-method -> deactivate-input-method
1836 **** quail-inactivate -> quail-deactivate
1837 **** robin-inactivate -> robin-deactivate
1838 **** viper-inactivate-input-method -> viper-deactivate-input-method
1839 **** viper-inactivate-input-method-action ->
1840 viper-deactivate-input-method-action
1841 **** ucs-input-inactivate -> ucs-input-deactivate
1844 The old hooks are still supported for backward compatibility, but they
1845 are deprecated and will be removed eventually.
1846 **** input-method-inactivate-hook -> input-method-deactivate-hook
1847 **** robin-inactivate-hook -> robin-deactivate-hook
1848 **** quail-inactivate-hook -> quail-deactivate-hook
1850 *** Renamed variables
1851 **** follow-deactive-menu -> follow-inactive-menu
1852 **** inactivate-current-input-method-function ->
1853 deactivate-current-input-method-function
1855 ** Some obsolete functions, variables, and faces have been removed:
1856 *** `last-input-char', `last-command-char', `unread-command-char'
1857 *** `facemenu-unlisted-faces'
1858 *** `rmail-decode-mime-charset'
1859 *** `iswitchb-read-buffer'
1860 *** `sc-version', `sc-submit-bug-report'
1861 *** `set-char-table-default'
1862 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1863 *** `compile-internal'
1865 *** `mode-line-inverse-video'
1866 *** `follow-mode-off-hook'
1867 *** `cvs-commit-buffer-require-final-newline'
1868 (use `log-edit-require-final-newline' instead)
1869 *** `cvs-changelog-full-paragraphs'
1870 (use `log-edit-changelog-full-paragraphs' instead)
1871 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1872 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1873 *** `vc-master-templates' (use `vc-handled-backends' instead)
1874 *** `vc-checkout-carefully'
1877 * Lisp Changes in Emacs 24.3
1879 ** CL-style generalized variables are now in core Elisp.
1880 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1881 You can define your own generalized variables using `gv-define-simple-setter',
1882 `gv-define-setter', etc.
1884 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1885 This can significantly speed up execution of non-byte-compiled code,
1886 but can also bump into previously unnoticed cyclic dependencies.
1887 These are generally harmless: they will simply cause the macro calls
1888 to be left for later expansion (as before), but will result in a
1889 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1890 You may wish to restructure your code so this does not happen.
1892 ** New sampling-based Elisp profiler.
1893 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1894 When finished, use M-x profiler-stop. The sampling rate can be based on
1895 CPU time or memory allocations.
1897 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1898 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1900 ** New macros `setq-local' and `defvar-local'.
1902 ** Face underlining can now use a wave.
1904 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1905 of `read-regexp' accepts a string ending with a colon and space, and its
1906 second argument DEFAULTS can be a list of strings accessible via `M-n'
1907 in the minibuffer ahead of other hard-coded useful regexp-related values.
1908 More commands use `read-regexp' now to read their regexp arguments.
1912 *** New function `completion-table-with-quoting' to handle completion
1913 in the presence of quoting, such as file completion in shell buffers.
1915 *** New function `completion-table-subvert' to use an existing completion
1916 table, but with a different prefix.
1920 *** New error type and new function `user-error'.
1921 These do not trigger the debugger.
1923 *** New option `debugger-bury-or-kill', saying what to do with the
1924 debugger buffer when exiting debug.
1926 *** Set `debug-on-message' to enter the debugger when a certain
1927 message is displayed in the echo area. This can be useful when trying
1928 to work out which code is doing something.
1930 *** New var `inhibit-debugger', automatically set to prevent accidental
1931 recursive invocations.
1935 *** New command `fit-frame-to-buffer' adjusts the frame height to
1938 *** The command `fit-window-to-buffer' can adjust the frame height
1939 if the new option `fit-frame-to-buffer' is non-nil.
1941 *** New macro `with-temp-buffer-window', similar to
1942 `with-output-to-temp-buffer'.
1944 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1947 *** New option `switch-to-buffer-preserve-window-point' to restore a
1948 window's point when switching buffers.
1950 *** New display action function `display-buffer-no-window' to not
1951 display the buffer in a window.
1953 *** New display action alist entry `allow-no-window' to indicate the
1954 caller of `display-buffer' is ready to handle the case of not
1955 displaying the buffer in a window.
1957 *** New display action alist entries `window-height' and `window-width'
1958 specify the size of new windows created by `display-buffer'.
1960 *** New display action alist entry `pop-up-frame-parameters', if
1961 non-nil, specifies frame parameters to give any newly-created frame.
1963 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1964 tells display action functions to avoid changing which frame is
1967 *** New display action alist entry `previous-window', if non-nil,
1968 specifies window to reuse in `display-buffer-in-previous-window'.
1970 *** New display action functions `display-buffer-below-selected',
1971 and `display-buffer-in-previous-window'.
1973 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1974 now accept a third argument to avoid choosing the selected window.
1976 *** Additional values recognized for option `window-combination-limit'.
1978 *** The following variables are obsolete, as they can be replaced by
1979 appropriate entries in the `display-buffer-alist' function introduced
1981 **** `dired-shrink-to-fit'
1982 **** `display-buffer-reuse-frames'
1983 **** `display-buffer-function'
1984 **** `special-display-buffer-names'
1985 **** `special-display-frame-alist'
1986 **** `special-display-function'
1987 **** `special-display-regexps'
1991 *** `current-time-string' no longer requires that its argument's year
1992 must be in the range 1000..9999. It now works with any year supported
1993 by the underlying C implementation.
1995 *** `current-time' now returns extended-format time stamps
1996 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1997 PSEC is typically a multiple of 1000 on current machines. Other
1998 functions that use this format, such as `file-attributes' and
1999 `format-time-string', have been changed accordingly. Old-format time
2000 stamps are still accepted.
2002 *** The format of timers in `timer-list' and `timer-idle-list' is now
2003 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2004 The PSECS slot is new, and uses picosecond resolution. It can be
2005 accessed via the new `timer--psecs' accessor.
2007 *** Last-modified time stamps in undo lists now are of the form
2008 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2012 *** Improved security when handling persistent objects:
2014 **** `eieio-persistent-read' now features optional arguments for specifying
2015 the class to load, as well as a flag stating whether subclasses are allowed;
2016 if provided, other classes will be rejected by the reader. For
2017 compatibility with existing code, if the class is omitted only a
2020 **** New specialized reader for pulling in classes and signaling errors
2021 without evaluation of suspicious code.
2023 **** All slots that contain objects must have a :type. Slots with lists
2024 of objects must use a new type predicate for a list of an object type.
2026 *** Support for `find-function' and similar utilities, through the addition
2027 of filename support to generated symbols.
2029 ** Floating point functions now always return special values like NaN,
2030 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2031 Previously, they returned NaNs on some platforms but signaled errors
2032 on others. The affected functions are acos, asin, tan, exp, expt,
2033 log, log10, sqrt, and mod.
2035 ** New fringe bitmap `exclamation-mark'.
2037 ** Miscellaneous changes to special forms and macros
2039 *** `defun' and `defmacro' are now macros rather than special forms.
2041 *** `kbd' is now a function rather than a macro.
2043 ** Miscellaneous new functions
2045 *** `set-temporary-overlay-map' sets up a temporary keymap that
2046 takes precedence over most other maps for a short while (normally one key).
2048 *** `autoloadp' tests if its argument is an autoloaded object.
2050 *** `autoload-do-load' performs the autoloading operation.
2052 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2054 *** `file-name-base' returns a file name sans directory and extension.
2056 *** `function-get' fetches a function property, following aliases.
2058 *** `posnp' tests if an object is a `posn'.
2060 *** `system-users' returns the user names on the system.
2062 *** `system-groups' returns the group names on the system.
2064 *** `tty-top-frame' returns the topmost frame of a text terminal.
2066 ** The following functions and variables are obsolete:
2067 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2068 *** `buffer-has-markers-at'
2069 *** `macro-declaration-function' (use `macro-declarations-alist')
2070 *** `window-system-version' (provides no useful information)
2071 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2072 *** `query-replace-interactive'
2073 *** `font-list-limit' (has had no effect since Emacs < 23)
2076 * Changes in Emacs 24.3 on Non-Free Operating Systems
2078 ** Cygwin builds can use the native MS Windows user interface.
2079 Pass `--with-w32' to configure. The default remains the X11 interface.
2081 ** Two new functions are available in Cygwin builds:
2082 `cygwin-convert-file-name-from-windows' and
2083 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2084 code to access the Cygwin file-name mapping machinery to convert
2085 between Cygwin and Windows-native file and directory names.
2087 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2088 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2089 `mouse-autoselect-window'.
2091 ** On MS Windows Vista and later Emacs now supports symbolic links.
2093 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2094 support for libxml2, even if its presence is detected.
2096 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2098 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2099 directories to the search path. You must add them yourself if you want them.
2102 * Changes in Emacs 24.2
2104 ** This is mainly a bug-fix release.
2107 * Installation Changes in Emacs 24.1
2109 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2110 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2111 also depend on Gtk+. You can disable them with --without-rsvg and
2114 ** Emacs can be compiled with GnuTLS support.
2115 This happens by default if a suitably recent version of the library is
2116 found at build time. To prevent this, use the configure option
2117 `--without-gnutls'. See below for GnuTLS features.
2119 ** Emacs can be compiled with SELinux support.
2120 This happens by default if a suitably recent version of the library is
2121 found at build time. To prevent this, use the configure option
2122 `--without-selinux'. See below for SELinux features.
2124 ** Emacs can be compiled with ImageMagick support.
2125 This happens by default if a suitably recent version of the library is
2126 found at build time. To prevent this, use the configure option
2127 `--without-imagemagick'. See below for ImageMagick features.
2128 This feature is not available for the Nextstep or MS ports.
2130 ** Emacs can be compiled with libxml2 support.
2131 This happens by default if a suitably recent version of the library is
2132 found at build time. To prevent this, use the configure option
2133 `--without-xml2'. See below for libxml2 features.
2135 ** By default, the installed Info and man pages are compressed.
2136 You can disable this by configuring --without-compress-info.
2138 ** New configure option --with-wide-int.
2139 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2140 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2143 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2144 These provide no new functionality, they just remove the need to edit
2145 lib-src/Makefile by hand in order to use the associated features.
2147 ** New configure option --enable-use-lisp-union-type.
2148 This is only useful for Emacs developers to debug certain types of bugs.
2149 This is not a new feature; only the configure flag is new.
2151 ** The standalone programs digest-doc and sorted-doc are removed.
2152 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2154 ** The standalone program `fakemail' is removed.
2155 If you need it, feedmail.el provides a superset of the functionality.
2158 * Startup Changes in Emacs 24.1
2160 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2161 command line arguments, and the EMACS_UNIBYTE environment variable, no
2162 longer have any effect. (They were declared obsolete in Emacs 23.)
2164 ** New command line option `--no-site-lisp' removes site-lisp directories
2165 from load-path. -Q now implies this. This option does not affect the
2166 EMACSLOADPATH environment variable (and hence has no effect for
2170 * Changes in Emacs 24.1
2174 *** Many packages now use the `completion-at-point' command,
2175 rather than implementing separate completion commands.
2177 *** `completion-at-point' now handles tags and semantic completion.
2179 *** Completion in a non-minibuffer now tries to detect the end of completion
2180 and pops down the *Completions* buffer accordingly.
2182 *** New option `completion-cycle-threshold' allows completion cycling.
2184 *** New option `completion-category-overrides' for overriding the
2185 default completion style in certain circumstances.
2187 *** New completion style `substring'.
2189 *** Completion of buffer names uses `substring' completion by default.
2191 *** The option `widget-complete-field' has been removed.
2195 *** The first time you try sending mail, Emacs asks for a mail method.
2196 This is implemented by a new default for `send-mail-function', which
2197 is `sendmail-query-once'. This offers to use the smtpmail package, or
2198 to use the old defaults relying on external mail facilities
2199 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2200 `mailclient-send-it' on Windows).
2202 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2203 transfers the report to your desktop's preferred mail client, if there
2204 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2207 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2208 and Mail mode changes
2210 ** Emacs server and client changes
2212 *** New option `server-port' specifies the port for TCP Emacs servers.
2214 *** New emacsclient argument -q/--quiet suppresses some status messages.
2216 *** New emacsclient argument --frame-parameters specifies the frame
2217 parameters of any newly-created graphical frame.
2219 *** If emacsclient shuts down due to Emacs signaling an error,
2220 its exit status is 1.
2222 *** New emacsclient argument --parent-id ID.
2223 This opens a client frame in parent X window ID, via XEmbed, similar
2224 to the --parent-id argument to Emacs.
2226 ** Internationalization changes
2228 *** Emacs now supports display and editing of bidirectional text.
2229 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2230 displayed in the correct visual order as expected by users of those
2231 scripts. The display reordering is a "full bidirectionality" class
2232 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2233 with no RTL text should look exactly the same as before.
2235 **** New buffer-local variable `bidi-display-reordering'.
2236 To disable display reordering in a buffer, change this to nil.
2238 **** New buffer-local variable `bidi-paragraph-direction'.
2239 If nil (the default), Emacs determines the base direction of each
2240 paragraph from its text, as specified by the UBA. Setting the value
2241 to `right-to-left' or `left-to-right' forces a base direction on each
2244 Paragraphs with right-to-left base direction are displayed starting at
2245 the right window edge.
2247 *** Enhanced support for characters with no glyphs in available fonts,
2248 or, on text terminals, characters that cannot be encoded by the
2249 terminal coding system. The new option `glyphless-char-display-control'
2250 specifies how to display them: as a hexadecimal code in a box, a thin
2251 1-pixel space, an empty box, etc.
2253 *** New input methods for Farsi and Bulgarian
2254 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2256 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2257 (U+2010 and U+2011).
2259 *** New Hebrew translation of the Emacs Tutorial.
2260 Type `C-u C-h t' to choose it in case your language setup doesn't
2261 automatically select it.
2263 ** An Emacs Lisp package manager is now included.
2264 This is a convenient way to download and install additional packages,
2265 from a package repository at http://elpa.gnu.org.
2267 *** M-x list-packages shows a list of packages, which can be
2268 selected for installation.
2270 *** New command `describe-package', bound to `C-h P'.
2272 *** By default, all installed packages are loaded automatically when
2273 Emacs starts up. To disable this, set `package-enable-at-startup' to
2274 nil. To specify the packages to load, customize `package-load-list'.
2276 ** Custom theme changes
2278 *** New command `M-x customize-themes', which provides a convenient
2279 interface for enabling and disabling Custom themes.
2281 *** New option `custom-theme-load-path' is the load path for themes.
2282 Emacs no longer looks for Custom themes in `load-path'. The default
2283 value of `custom-theme-load-path' says to look for themes in
2284 `custom-theme-directory', followed by a subdirectory of
2285 `data-directory' named "themes/", which contains a small selection of
2286 built-in Custom themes.
2288 *** New option `custom-safe-themes' records known-safe theme files.
2289 If a theme is not in this list, Emacs queries before loading it, and
2290 offers to save the theme to `custom-safe-themes' automatically. By
2291 default, all themes included in Emacs are treated as safe.
2293 ** Improved GTK integration
2295 *** GTK scroll-bars are now placed on the right by default.
2296 The function `set-scroll-bar-mode' can change this.
2298 *** GTK tool bars can have just text, just images or images and text.
2299 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2300 the default is taken from desktop settings.
2302 *** GTK tool bars can be placed on any edge of the frame.
2303 The frame-parameter tool-bar-position controls this. It takes the
2304 values top, left, right or bottom. The Options => Show/Hide menu has
2307 *** The default colors for selected text (the `region' face) are taken
2308 from the GTK theme when Emacs is built with GTK.
2310 *** Emacs uses GTK tooltips by default if built with GTK.
2311 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2313 ** Graphical interface changes
2315 *** On graphical displays, the mode-line no longer ends in dashes.
2316 Also, the first dash (which does not indicate anything) is just
2317 displayed as a space.
2319 *** `menu-bar-select-buffer-function' lets you choose another operation
2320 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2322 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2323 built with Xft. These fonts can be set via X resources, for example:
2324 Emacs.pane.menubar.font: Courier-12
2328 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2329 or if it receives a SIGINT signal in batch mode.
2331 *** `kill-emacs-hook' is now also run in batch mode.
2332 Third-party code which adds to `kill-emacs-hook' should check if they
2333 do the right thing in batch mode.
2335 ** Scrolling changes
2337 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2338 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2339 of buffer at first key-press (instead they move to top/bottom of buffer)
2340 when `scroll-error-top-bottom' is non-nil.
2342 *** New option `scroll-error-top-bottom' (see above).
2344 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2345 scroll a line instead of full screen.
2347 *** New property `scroll-command' should be set on a command's symbol to
2348 define it as a scroll command affected by `scroll-preserve-screen-position'.
2350 *** If you customize `scroll-conservatively' to a value greater than 100,
2351 Emacs will never recenter point in the window when it scrolls due to
2352 cursor motion commands or commands that move point (e.f., `M-g M-g').
2353 Previously, you needed to use `most-positive-fixnum' as the value of
2354 `scroll-conservatively' to achieve the same effect.
2356 *** "Aggressive" scrolling now honors the scroll margins.
2357 If you customize `scroll-up-aggressively' or
2358 `scroll-down-aggressively' and move point off the window, Emacs now
2359 scrolls the window so as to avoid positioning point inside the scroll
2362 ** Basic SELinux support has been added.
2363 This requires Emacs to be linked with libselinux at build time.
2365 *** Emacs preserves the SELinux file context when backing up.
2366 Also, the function `copy-file' has an extra optional argument for
2367 preserving SELinux context, and the return value of `backup-buffer'
2368 now includes the SELinux context.
2370 *** New functions `file-selinux-context' and `set-file-selinux-context'
2371 get and set the SELinux context of a file.
2375 *** `delete-by-moving-to-trash' now only affects commands that specify
2376 trashing. This avoids inadvertently trashing temporary files.
2378 *** Calling `delete-file' or `delete-directory' with a prefix argument
2379 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2381 ** File- and directory-local variable changes
2383 *** You can stop directory local vars from applying to subdirectories.
2384 Add an element (subdirs . nil) to the alist portion of any variables
2385 settings to indicate that the section should not apply to
2388 *** Directory local variables can apply to some file-less buffers.
2389 Affected modes include dired, vc-dir, and log-edit. For example,
2390 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2391 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2392 `hack-dir-local-variables-non-file-buffer' to support this.
2394 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2395 Instead, use "eval: (minor-mode 1)".
2397 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2398 to `inhibit-local-variables-regexps'. As the name suggests, it now
2399 applies to ALL file local variables, not just -*- lines. The
2400 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2405 *** The `quit-window' command now restores the last buffer displayed
2406 in the quitted window.
2408 *** Resizing an Emacs frame now preserves proportional window sizes,
2409 modulo restrictions like window minimum sizes and fixed-size windows.
2411 *** The behavior of `display-buffer' is now customizable in detail.
2413 **** New option `display-buffer-base-action' specifies a list of
2414 user-determined display "actions" (functions and optional arguments
2415 for choosing the displaying window).
2417 This takes precedence over the default display action, which is
2418 specified by `display-buffer-fallback-action'.
2420 **** New option `display-buffer-alist' maps buffer name regexps to
2421 display actions, taking precedence over `display-buffer-base-action'.
2423 *** New option `window-combination-limit'.
2424 The new option `window-combination-limit' allows to return the space
2425 obtained for resizing or creating a window more reliably to the window
2426 from which such space was obtained.
2428 *** New option `window-combination-resize'.
2429 The new option `window-combination-resize' allows to split a window that
2430 otherwise cannot be split because it's too small by stealing space from
2431 other windows in the same combination. Subsequent resizing or deletion
2432 of the window will resize all windows in the same combination as well.
2434 *** New option `frame-auto-hide-function' lets you choose between
2435 iconifying or deleting a frame when burying a buffer in a dedicated
2436 frame, or quitting a window showing a buffer in a frame of its own.
2438 *** New commands `maximize-window' and `minimize-window'.
2439 These maximize and minimize the size of a window within its frame.
2441 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2442 These functions allow to navigate through the live buffers that have
2443 been shown in a specific window.
2445 ** Minibuffer changes
2447 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2448 This is handy for minibuffer-only frames, and is also used for the feature
2449 where mouse-1 pops up *Messages*"', which can now easily be changed.
2451 *** Minibuffers set `truncate-lines' to nil.
2452 If you want to change the value to something else, you could use
2453 for example `minibuffer-setup-hook'.
2455 ** `auto-mode-case-fold' is now enabled by default.
2457 ** `backup-by-copying-when-mismatch' now defaults to t.
2459 ** New basic faces `error', `warning', `success'.
2460 These are used to highlight text indicating failure, caution or
2461 successful operation.
2463 ** New option `list-colors-sort' defines the color sort order
2464 for `list-colors-display'.
2466 ** The variable `focus-follows-mouse' now always defaults to nil.
2469 * Editing Changes in Emacs 24.1
2473 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2474 `isearch-yank-line'.
2476 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2477 `isearch-yank-kill'.
2479 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2481 ** New commands `count-words-region' and `count-words'.
2483 *** M-= is bound to `count-words-region', not `count-lines-region'.
2484 The `count-words-region' command, when called interactively, reports
2485 the number of lines, words, and characters in the region. It is a
2486 superset of the old `count-lines-region', which is now an obsolete
2489 ** The command `just-one-space' (M-SPC), if given a negative argument,
2490 also deletes newlines around point.
2494 *** New option `delete-active-region'.
2495 If non-nil, [delete] and DEL delete the region if it is active and no
2496 prefix argument is given. If set to `kill', those commands kill
2499 *** New command `delete-forward-char', bound to [delete].
2500 This is meant for interactive use, and obeys `delete-active-region'.
2501 The command `delete-char' does not obey `delete-active-region'.
2503 *** `delete-backward-char' is now a Lisp function.
2504 Apart from obeying `delete-active-region', its behavior is unchanged.
2505 However, the byte compiler now warns if it is called from Lisp; Lisp
2506 callers should use delete-char with a negative argument instead.
2508 *** The option `mouse-region-delete-keys' has been deleted.
2510 ** Selection changes.
2512 The default handling of clipboard and primary selections has been
2513 changed to conform with modern X applications. In short, most
2514 commands for killing and yanking text now use the clipboard, while
2515 mouse commands use the primary selection.
2517 In the following, we provide a list of these changes, followed by a
2518 list of steps to get the old behavior back if you prefer that.
2520 *** `select-active-regions' now defaults to t.
2521 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2522 the kill ring. The selected text is put in the primary selection, if
2523 the system possesses a separate primary selection facility (e.g. X).
2525 **** `select-active-regions' also accepts a new value, `only'.
2526 This means to only set the primary selection for temporarily active
2527 regions (usually made by mouse-dragging or shift-selection);
2528 "ordinary" active regions, such as those made with C-SPC followed by
2529 point motion, do not alter the primary selection.
2531 **** `mouse-drag-copy-region' now defaults to nil.
2533 *** mouse-2 is now bound to `mouse-yank-primary'.
2534 This pastes from the primary selection, ignoring the kill-ring.
2535 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2537 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2539 *** `x-select-enable-primary' now defaults to nil.
2540 Thus, commands that kill text or copy it to the kill-ring (such as
2541 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2543 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2544 exactly equivalent to M-w, C-w, and C-y respectively.
2546 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2547 non-nil by default, as Windows does not support the primary selection
2548 between applications.
2550 *** To return to the previous behavior, do the following:
2552 **** Change `select-active-regions' to nil.
2553 **** Change `mouse-drag-copy-region' to t.
2554 **** Change `x-select-enable-primary' to t (on X only).
2555 **** Change `x-select-enable-clipboard' to nil.
2556 **** Bind `mouse-yank-at-click' to mouse-2.
2558 *** Support for X cut buffers has been removed.
2560 *** X clipboard managers are now supported.
2561 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2563 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2564 in the current rectangle. With a prefix argument, this prompts for a
2565 number to count from and for a format string.
2567 ** `redisplay-dont-pause' now defaults to t.
2568 This makes Emacs feel more responsive to editing commands that arrive
2569 at high rate, e.g. if you lean on some key, because stopping redisplay
2570 in the middle (when this variable is nil) forces more expensive
2571 updates later on, and Emacs appears to be unable to keep up.
2573 ** The behavior of <TAB> for active regions in Text mode has changed.
2574 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2575 when the region is active causes Emacs to indent all the lines in the
2576 region, aligning them with the line previous to the first line in the
2577 region (or with the left margin if there is no previous line).
2579 ** When `occur' is called with a prefix argument, matching strings are
2580 collected into the `*Occur*' buffer without line numbers. If there
2581 are parenthesized subexpressions in the specified regexp, `occur'
2582 reads replacement text that may contain \\& and \\N whose convention
2583 follows `replace-match'.
2586 * Changes in Specialized Modes and Packages in Emacs 24.1
2588 ** Archive Mode has basic support for browsing and updating 7z archives.
2592 *** BibTeX mode now supports biblatex.
2593 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2594 `bibtex-entry-field-alist' is now an obsolete alias for
2595 `bibtex-BibTeX-entry-alist'.
2597 *** New command `bibtex-search-entries', bound to C-c C-a.
2599 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2601 *** New variable `bibtex-search-entry-globally'.
2605 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2607 *** The default browser used by the package is now the "xdg-open" program,
2608 on platforms that support it. This calls your desktop's preferred browser.
2612 *** Support for musical notes.
2614 *** Support for logarithmic units.
2616 *** No longer uses the tex prefix for TeX specific unit names when
2617 using TeX or LaTeX mode.
2619 *** New option to highlight selections using faces.
2621 *** `calc-histogram' has the option of using a vector to determine the bins.
2623 *** New "O" option prefix.
2625 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2627 ** Calendar, Diary, and Appt
2629 *** Diary entries can contain non-printing "comments".
2630 See the variable `diary-comment-start'.
2632 *** Appointments can specify their individual warning times.
2633 See the variable `appt-warning-time-regexp'.
2635 *** The function specified by `appt-disp-window-function' may be passed
2636 lists of arguments if multiple appointments are due at similar times.
2637 If you are using a custom function for this, you should update it.
2639 *** New function `diary-hebrew-birthday'.
2641 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2642 may no longer be nil, but must all be strings.
2644 *** The obsolete (since Emacs 22.1) method of enabling the appt
2645 package by adding `appt-make-list' to `diary-hook' has been removed.
2646 Use `appt-activate' instead.
2648 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2649 appt-issue-message (use the function appt-activate)
2650 appt-visible/appt-msg-window (use the variable appt-display-format)
2652 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2653 view-diary-entries, list-diary-entries, show-all-diary-entries
2657 *** New feature to "guess" the style in an existing buffer.
2658 The main entry point is M-x c-guess.
2660 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2662 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2663 Thus C-M-a will, by default, go to the beginning of the immediate function,
2666 *** "Macros with semicolons" can be registered for correct indentation.
2667 Where such a macro ends a line (no semicolon) the next statement is no longer
2668 parsed as a statement continuation.
2670 ** Comint and modes derived from it use the standard completion code.
2674 *** Compilation mode can be used without Font Lock mode.
2675 `compilation-parse-errors-function' is now obsolete.
2677 *** New variable `compilation-filter-start', which is bound while
2678 `compilation-filter-hook' runs. It records the start position of the
2679 text inserted by `compilation-filter'.
2681 *** `compilation-error-screen-columns' and `compilation-first-column'
2682 are obeyed in the editing buffer. So programming language modes can
2683 set them, whereas previously only the value in the *Compilation*
2688 *** Customize buffers now contain a search field.
2689 The search is performed using `customize-apropos'.
2690 To turn off the search field, set `custom-search-field' to nil.
2692 *** Options in customize group buffers start out hidden if not customized.
2693 Use the arrow to the left of the option name to toggle visibility.
2695 *** custom-buffer-sort-alphabetically now defaults to t.
2697 *** The color widget now has a "Choose" button, which allows you to
2698 choose a color via `list-colors-display'.
2702 *** It is now possible to access buses other than the default system
2705 *** The `dbus-register-method' and `dbus-register-property' functions
2706 optionally do not register names.
2708 *** The new function `dbus-register-service' registers a known service
2709 name on a D-Bus without also registering a property or a method.
2713 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2714 if called with a prefix argument, read a file name from the minibuffer
2715 instead of using the current buffer.
2717 *** The "dired local variables" feature of Dired-x is obsolete.
2718 The standard directory local variables feature replaces it.
2722 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2723 controlling attempts to autojoin a channel.
2725 *** New variable `erc-coding-system-precedence': If we use `undecided'
2726 as the server coding system, this variable will then be consulted.
2727 The default is to decode strings that can be decoded as utf-8 as
2728 utf-8, and do the normal `undecided' decoding for the rest.
2732 *** The default value of `eshell-directory-name' has changed
2733 to be an "eshell" directory in `user-emacs-directory'.
2734 The old "~/.eshell/" directory is still used if it exists, though.
2738 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2739 It now supports multithread non-stop debugging and simultaneous
2740 debugging of several threads.
2744 *** RET (`image-toggle-animation') toggles animation, if applicable.
2745 Animation plays once, unless the option `image-animate-loop' is non-nil.
2749 *** New command M-x info-display-manual displays a named Info manual.
2750 If that manual is already visited in some Info buffer, it displays
2751 that buffer. (This is handy if you have many manuals in many *info*
2752 buffers, and don't remember the name of the buffer visiting the manual
2753 you want to consult.) Otherwise, it loads and displays the manual.
2755 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2756 This is for compatibility with the stand-alone Info reader program,
2757 and also because `Info-edit' is a rarely used command that is disabled
2760 ** Mail mode changes (not Message mode)
2762 *** New command M-x mail-add-attachment for adding MIME attachments
2764 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2765 (Its name is misleading, since it has nothing to do with MIME
2766 attachments.) The old name is now an obsolete alias to the new name.
2768 ** MH-E has been updated to MH-E version 8.3.1.
2769 See MH-E-NEWS for details.
2771 ** Modula-2 mode provides auto-indentation.
2773 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2775 ** nXML mode no longer binds C-RET to `nxml-complete'.
2776 Completion is now performed via `completion-at-point', bound to C-M-i
2777 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2778 default), this performs tag completion.
2780 ** Org mode has been updated to version 7.8.09.
2781 See ORG-NEWS for details.
2783 ** Prolog mode has been completely revamped, with lots of additional
2784 functionality such as more intelligent indentation, electricity,
2785 support for more variants, including Mercury, and a lot more.
2789 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2790 in the Rmail incoming message.
2792 *** The variable `rmail-message-filter' no longer has any effect.
2793 This change was made in Emacs 23.1 but was not advertised at the time.
2794 Try using `rmail-show-message-hook' instead.
2798 *** M-x shell prompts for the shell path name if the default directory
2799 is a remote file name and neither the environment variable $ESHELL nor
2800 the variable `explicit-shell-file-name' is set.
2802 *** TAB is now bound to the standard `completion-at-point' command,
2803 which now implements the pcomplete rules for shell command completion.
2807 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2808 if the mail server supports them. This uses either built-in GnuTLS
2809 support, or the starttls.el library. Customize `smtpmail-stream-type'
2812 *** The variable `smtpmail-auth-credentials' has been removed.
2813 By default, the information is now stored in the file ~/.authinfo.
2814 This was the default value of smtpmail-auth-credentials. If you had
2815 customized smtpmail-auth-credentials to a list of user names and
2816 passwords, those settings are not used. During your first connection
2817 to the smtp server, Emacs will prompt for the user name and password,
2818 and offer to save them to ~/.authinfo. Or you can manually copy the
2819 credentials to ~/.authinfo. For example, if you had
2821 (setq smtpmail-auth-credentials
2822 '(("mail.example.org" 25 "jim" "s!cret")))
2824 then the equivalent line in ~/.authinfo would be
2826 machine mail.example.org port 25 login jim password s!cret
2828 See the auth-source manual for more information, e.g. on encrypting
2829 the credentials file.
2831 *** The variable `smtpmail-starttls-credentials' has been removed.
2832 If you had that set, you need to put
2834 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2836 in your ~/.authinfo file instead.
2838 *** SMTPmail defaults to using the address in the From: header as the
2839 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2840 to the address you wish to use instead.
2844 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2845 and `sql-oracle-scan-on'.
2847 *** New options controlling prompting for login parameters.
2848 Each supported product has a custom variable `sql-*-login-params',
2849 which is a list of the parameters to be prompted for before a
2850 connection is established.
2852 *** The command `sql-product-interactive' now takes a prefix argument,
2853 which causes it to prompt for an SQL product.
2855 *** Product-specific SQL interactive commands now take prefix arguments.
2856 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2857 given a prefix argument, prompt for a name for the SQL interactive
2858 buffer. This reduces the need for calling `sql-rename-buffer'.
2860 *** SQL interactive modes suppress command continuation prompts, and
2861 replace tabs with spaces. The first change impacts multiple line SQL
2862 statements entered with C-j between each line, statements yanked into
2863 the buffer and statements sent with `sql-send-*' functions. The
2864 second prevents the MySQL and Postgres interpreters from listing
2865 object name completions when sent text via `sql-send-*' functions.
2867 *** New command `sql-connect' starts a predefined SQLi session,
2868 using the login parameters from `sql-connection-alist'.
2870 *** New "Save Connection" menu item in SQLi buffers.
2871 This gathers the login params specified for the SQLi session, if it
2872 was not started by a connection, and saves them as a new connection.
2874 *** New commands for listing database objects and details:
2875 sql-list-all and sql-list-table.
2877 *** An API for manipulating SQL product definitions has been added.
2881 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2885 *** New inline access method "ksu" (kerberized su).
2887 *** The following access methods are discontinued: "ssh1_old",
2888 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2890 *** The user option `remote-file-name-inhibit-cache' controls whether
2891 remote file attributes are cached for better performance.
2893 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2894 default value to "".
2896 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2897 for remote machines which support SELinux.
2899 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2900 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2901 the degree of parallelism.
2903 ** VC and related modes
2905 *** Support for pulling on distributed version control systems.
2906 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2907 supported (currently with Bzr, Git, and Mercurial), to update the
2908 current branch and working tree. A prefix argument means to prompt
2909 the user for specifics, e.g. a pull location.
2911 *** `vc-update' is now an alias for `vc-pull'.
2913 *** Support for merging on distributed version control systems.
2914 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2915 is supported (currently with Bzr, Git, and Mercurial), to merge
2916 changes from another branch into the current one. It prompts for
2917 specifics, e.g. a merge source.
2919 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2920 shows a diff while querying the user. It defaults to t.
2922 *** Log entries in some Log View buffers can be toggled to display a
2923 longer description by typing RET (log-view-toggle-entry-display).
2924 This is currently supported for Bzr, Git, and Mercurial (to support
2925 another backend, define a `log-view-expanded-log-entry-function').
2926 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2927 use this to display the full log entry for the revision at point.
2929 *** New command `vc-ediff' allows visual comparison of two revisions
2930 of a file similar to `vc-diff', but using ediff backend.
2932 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2933 this was not advertised at the time.
2935 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2936 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2937 this was not advertised at the time.
2943 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2945 *** partial-completion-mode (complete.el) is obsolete.
2946 You can get a comparable behavior with:
2947 (setq completion-styles '(partial-completion initials))
2948 (setq completion-pcm-complete-word-inserts-delimiters t)
2950 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2952 *** pgg is obsolete (use EasyPG instead).
2954 *** sregex.el is obsolete, since rx.el is a strict superset.
2956 *** s-region.el and pc-select.el are obsolete.
2957 They are superseded by shift-select-mode, enabled by default since 23.1.
2959 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2963 *** The Landmark game is now invoked with `landmark', not `lm'.
2964 Its functions and variables have been similarly renamed.
2966 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2967 (This interfered with cua-mode.)
2969 *** f90.el has some support for Fortran 2008 syntax.
2971 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2973 *** New command `nato-region' converts text to NATO phonetic alphabet.
2976 * New Modes and Packages in Emacs 24.1
2978 ** Occur Edit mode applies edits made in *Occur* buffers to the
2979 original buffers. It is bound to "e" in Occur mode.
2981 ** New global minor mode electric-pair-mode.
2982 When enabled, typing an open parenthesis automatically inserts the
2983 matching closing one.
2985 ** New global minor mode electric-indent-mode.
2986 When enabled, typing certain characters triggers reindentation.
2987 Major modes wishing to use this can set electric-indent-chars or
2988 electric-indent-functions.
2990 ** New global minor mode electric-layout-mode.
2991 When enabled, typing certain characters automatically inserts newlines.
2992 Major modes wishing to use this can set electric-layout-rules.
2994 ** tabulated-list.el provides a generic major mode for tabulated data,
2995 from which other modes can be derived.
2997 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2999 ** secrets.el is an implementation of the Secret Service API, an
3000 interface to password managers like GNOME Keyring or KDE Wallet. The
3001 Secret Service API requires D-Bus for communication. The command
3002 `secrets-show-secrets' offers a buffer with a visualization of the
3005 ** notifications.el provides an implementation of the Desktop
3006 Notifications API. It requires D-Bus for communication.
3008 ** soap-client.el supports access to SOAP web services from Emacs.
3009 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3011 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3013 ** New emacs-lock.el package.
3014 The previous version has been moved to obsolete/old-emacs-lock.el.
3015 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3016 against exiting Emacs and killing the buffer can be set separately.
3017 The mechanism for automatically turning off protection for buffers
3018 with dead inferior processes has been generalized.
3021 * Incompatible Lisp Changes in Emacs 24.1
3023 ** Passing a nil argument to a minor mode function call now ENABLES
3024 the minor mode unconditionally. This is so that you can write e.g.
3026 (add-hook 'text-mode-hook 'foo-mode)
3028 to enable foo-mode in Text mode buffers, removing the need for
3029 `turn-on-foo-mode' style functions. This affects all mode commands
3030 defined by `define-minor-mode'. If called interactively, the mode
3031 command still toggles the minor mode.
3033 ** The return value of `backup-buffer' has changed.
3034 It is now a list of three elements, where the second element is a list
3035 describing the original file's SELinux context. If Emacs or the
3036 system lacks SELinux support, the context list is (nil nil nil nil).
3037 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3039 ** `char-direction-table' and the `char-direction' function were deleted.
3040 They were buggy and inferior to the new support of bidirectional
3041 editing introduced in Emacs 24. If you need the bidirectional
3042 properties of a character, use `get-char-code-property' with the last
3043 argument `bidi-class'.
3045 ** `copy-directory' now copies the source directory as a subdirectory
3046 of the target directory, if the latter is an existing directory. The
3047 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3048 the contents directly into a pre-existing target directory.
3050 ** For mouse click input events in the text area, the Y pixel
3051 coordinate in the POSITION list now counts from the top of the text
3052 area, excluding any header line. Previously, it counted from the top
3055 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3056 been further reduced. Now a backquote not followed by a space is
3057 always treated as a "new-style" backquote. Please remove all
3058 "old-style" backquotes from your code. If your code uses backquotes
3059 as documented in the Elisp manual, and compiles without warning, then
3060 you have nothing to do in this regard. Code not following the
3061 appropriate conventions may fail to compile.
3063 The most common cause of trouble seems to be an old-style backquote
3064 followed by a newline. Another cause of trouble is vector notation
3065 for key sequence notation: instead of [(control ,)] and [(control ')],
3066 you should write [(control ?,)] and [(control ?')], which will work in
3069 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3070 was not advertised at the time. The function `custom-initialize-delay'
3071 replaced all known uses.
3073 ** `view-buffer' now treats special mode-class in the same way that
3074 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3075 major mode is special).
3077 ** Menu and tool bar changes
3079 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3080 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3081 With these alist entries omitted, `make-frame' checks the value of the
3082 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3083 a menu-bar or tool-bar, respectively. If the alist entries are added,
3084 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3086 *** The menu bar bindings's caches are not used any more.
3087 Use (where-is-internal <def> nil t) instead.
3089 ** Regions created by mouse dragging are now normal active regions,
3090 similar to those created by shift-selection (see Selection changes
3091 above). In previous Emacs versions, these regions were delineated by
3092 `mouse-drag-overlay'; that variable has been removed.
3094 ** The fourth argument of `filter-buffer-substring' has been removed.
3095 If you want to remove text properties from the final result, simply
3096 pass the result through substring-no-properties.
3098 ** cl.el no longer provides `cl-19'.
3100 ** The following obsolete functions and aliases have been removed
3101 (the appropriate new function is given in parentheses; "not needed"
3102 means you can just remove all calls to the function in question):
3104 *** `comint-kill-output' (`comint-delete-output')
3105 *** `decompose-composite-char' (`char-to-string')
3106 *** `outline-visible' (`outline-invisible-p')
3107 *** `internal-find-face' (`facep')
3108 *** `internal-get-face' (`facep and check-face')
3109 *** `frame-update-faces' (not needed)
3110 *** `frame-update-face-colors' (`frame-set-background-mode')
3111 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3112 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3113 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3114 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3115 *** `x-make-font-unbold' (`make-face-unbold')
3116 *** `x-make-font-unitalic' (`make-face-unitalic')
3117 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3118 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3119 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3120 *** `char-bytes' (== 1)
3121 *** `isearch-return-char' (`isearch-printing-char')
3122 *** `make-local-hook' (not needed)
3123 *** `set-screen-height' (`set-frame-height')
3124 *** `set-screen-width' (`set-frame-width')
3126 ** The following obsolete variables and varaliases have been removed
3127 (the appropriate new variable is given in parentheses):
3129 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3130 *** `vc-header-alist' (`vc-BACKEND-header')
3131 *** `directory-sep-char' (== ?/)
3132 *** `font-lock-defaults-alist' (`font-lock-defaults')
3133 *** `e' (`float-e').
3135 ** The following obsolete files were removed:
3136 sc.el, x-menu.el, rnews.el, rnewspost.el
3138 ** The format of the finder-inf.el file has changed, since the Finder
3139 mechanism is now based on the package system. The variable
3140 `finder-package-info' is replaced by `package--builtins' and
3141 `finder-keywords-hash'.
3143 ** When generating autoloads, `update-directory-autoloads' no longer
3144 assumes every inspected file is in your `load-path'. It instead
3145 generates relative names according to the current `load-path'.
3148 * Lisp Changes in Emacs 24.1
3150 ** Code can now use lexical scoping by default instead of dynamic scoping.
3151 The `lexical-binding' variable enables lexical scoping for local
3152 variables. It is typically set via a file-local variable in the first
3153 line of the file, in which case it applies to all the code in that
3156 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3157 binding instead of the old dynamic binding mode.
3159 *** Lexically scoped interpreted functions are represented with a new form
3160 of function value which looks like (closure ENV ARGS &rest BODY).
3162 *** New macro `letrec' to define recursive local functions.
3164 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3165 So do `defcustom' and other forms that call `defvar' as a subroutine.
3167 *** New function `special-variable-p' to check whether a variable is
3168 declared as dynamically bound.
3170 *** The form ((lambda ...) ...) is deprecated.
3172 ** An Emacs Lisp testing tool is now included.
3173 Emacs Lisp developers can use this tool to write automated tests for
3174 their code. See the ERT info manual for details.
3176 ** Changes for bidirectional display and editing
3178 *** New function `current-bidi-paragraph-direction'.
3179 This returns the base direction of the paragraph at point.
3181 *** New function `bidi-string-mark-left-to-right'.
3182 Given a string containing characters from right-to-left scripts, this
3183 function returns another string which can be safely inserted into a
3184 buffer, such that any following text will be always displayed to the
3185 right of that string. (This works by appending an invisible Unicode
3186 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3188 This is useful when the buffer has overall left-to-right paragraph
3189 direction and you need to insert a string whose contents are not known
3190 in advance, without disrupting the layout of the line.
3194 *** Window tree functions are accessible in Elisp.
3195 Functions are provided to return the parent, siblings or child windows
3196 of any window including internal windows (windows not associated with a
3197 buffer) in the window tree.
3199 **** New function `window-valid-p' gives non-nil for live and internal
3202 **** Window manipulation can deal with internal windows.
3203 Many window handling functions like `split-window', `delete-window', or
3204 `delete-other-windows' as well as the window resizing functions can now
3205 act on any window including internal ones.
3207 *** window-total-height/-width vs window-body-height/-width.
3208 The function `window-height' has been renamed to `window-total-height'
3209 and `window-width' has been renamed to `window-body-width'. The old
3210 names are provided as aliases. Two new functions `window-total-width'
3211 and `window-body-height' are provided.
3213 *** Window parameters specific to window handling functions.
3214 For each window you can specify a parameter to override the default
3215 behavior of a number of functions like `split-window', `delete-window'
3216 and `delete-other-windows'. The variable `ignore-window-parameters'
3217 allows to ignore processing such parameters.
3219 *** New semantics of third argument of `split-window'.
3220 The third argument of `split-window' has been renamed to SIDE and can be
3221 set to any of the values 'below, 'right, 'above, or 'left to make the
3222 new window appear on the corresponding side of the window that shall be
3223 split. Any other value of SIDE will cause `split-window' to split the
3224 window into two side-by-side windows as before.
3226 *** Window resizing functions.
3227 A new standard function for resizing windows called `window-resize' has
3228 been introduced. This and all other functions for resizing windows no
3229 longer delete any windows when they become too small.
3231 *** Deleting the selected window now selects the most recently selected
3232 live window on that frame instead.
3234 *** `adjust-window-trailing-edge' adjustments.
3235 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3236 is able to resize other windows if a window adjacent to the trailing
3237 edge cannot be shrunk any more. This makes its behavior more similar to
3238 that of Emacs 21 without compromising, however, its inability to delete
3239 windows which was introduced in Emacs 22.
3241 *** Window-local buffer lists.
3242 Windows now have local buffer lists. This means that removing a buffer
3243 from display in a window will preferably show the buffer previously
3244 shown in that window with its previous window-start and window-point
3245 positions. This also means that the same buffer may be automatically
3246 shown twice even if it already appears in another window.
3248 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3249 which if non-nil requires the buffer to be displayed in the currently
3250 selected window, signaling an error otherwise. If nil, another window
3251 can be used, e.g. if the selected one is strongly dedicated.
3253 *** `split-window-vertically' and `split-window-horizontally' renamed
3254 to `split-window-below' and `split-window-right' respectively.
3255 The old names are kept as aliases.
3259 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3260 named ACTION, and takes a display action of the same form as
3261 `display-buffer-base-action' (see Changes, above). A non-nil,
3262 non-list value is treated specially, as the old meaning.
3264 **** New variable `display-buffer-overriding-action'.
3266 **** The procedure of `display-buffer' etc. to choose a window is
3267 determined by combining `display-buffer-overriding-action',
3268 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3269 and `display-buffer-fallback-action'. The second and fourth of these
3270 are user-customizable variables.
3272 See the docstring of `display-buffer' for details.
3274 *** New functions `window-state-get' and `window-state-put'.
3275 These functions allow to save and restore the state of an arbitrary
3276 frame or window as an Elisp object.
3280 *** New variable `completion-extra-properties' used to specify extra
3281 properties of the current completion:
3282 - :annotate-function, same as the old completion-annotate-function.
3283 - :exit-function, function to call after completion took place.
3285 *** Functions on `completion-at-point-functions' can return any of the
3286 properties valid for `completion-extra-properties'.
3288 *** `completion-annotate-function' is obsolete.
3290 *** New `metadata' method for completion tables. The metadata thus returned
3291 can specify various details of the data returned by `all-completions':
3292 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3293 used to select a style in completion-category-overrides.
3294 - `annotation-function' to add annotations in *Completions*.
3295 - `display-sort-function' to specify how to sort entries in *Completions*.
3296 - `cycle-sort-function' to specify how to sort entries when cycling.
3298 *** `minibuffer-local-filename-must-match-map' is not used any more.
3299 Instead, the bindings in `minibuffer-local-filename-completion-map'
3300 are combined with `minibuffer-local-must-match-map'.
3302 *** New variable `completing-read-function' allows overriding the
3303 behavior of `completing-read'.
3305 ** `glyphless-char-display' can now distinguish between graphical and
3306 text terminal display, via a char-table entry that is a cons cell.
3308 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3309 Instead, the offending function is removed.
3313 *** New function `run-hook-wrapped' for running an abnormal hook by
3314 passing the hook functions as arguments to a "wrapping" function.
3315 Like `run-hook-with-args-until-success', it stops at the first
3316 non-nil return value.
3318 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3319 set of "wrapping" filters, similar to around advice.
3320 (A version of this macro was actually added in Emacs 23.2 but was not
3321 advertised at the time.)
3325 *** New macro `condition-case-unless-debug' (this was actually added in
3326 Emacs 23.1 as condition-case-no-debug, but not advertised)
3328 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3330 *** Variable `stack-trace-on-error' removed.
3332 *** The debugger can now "continue" from an error, which means it will
3333 jump to the error handler as if the debugger had not been invoked
3334 instead of jumping all the way to the top-level.
3336 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3337 This can be useful when `inhibit-quit' is set.
3339 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3340 named Emacs server instances.
3342 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3343 to redirect STDOUT to a file.
3345 ** The function `format-time-string' now supports the %N directive,
3346 for higher-resolution time stamps.
3348 ** New input reading functions
3350 *** New function `read-char-choice' reads a restricted set of
3351 characters, discarding any inputs not inside the set.
3353 *** The command `read-color' now requires a match for a color name
3354 or RGB triplet, instead of signaling an error if the user provides
3357 **** `facemenu-read-color' is now an alias for `read-color'.
3359 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3360 The variable is now used to load all kind of supported dynamic libraries,
3361 not just image libraries. The previous name is still available as an
3364 ** Syntax parsing changes
3366 *** New variable `syntax-propertize-function'.
3367 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3368 This allows syntax-table properties to be set independently from font-lock:
3369 just call syntax-propertize to make sure the text is propertized.
3370 Together with this new variable come a new hook
3371 syntax-propertize-extend-region-functions, as well as two helper functions:
3372 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3373 as-is; and syntax-propertize-rules which provides a new way to specify
3376 *** Syntax tables support a new "comment style c" additionally to style b.
3378 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3380 ** frame-local variables cannot be let-bound any more.
3382 ** Major and minor mode changes
3384 *** `set-auto-mode' now respects mode: local variables at the end of files,
3385 as well as those in the -*- line.
3387 *** `prog-mode' is a new major mode from which programming modes
3390 **** `prog-mode-hook' can be used to enable features for programming
3391 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3392 on-the-fly spell checking for comments and strings.
3394 **** New minor modes `prettify-symbols-mode' and
3395 `global-prettify-symbols-mode' let the user enable symbol
3396 prettification (replacing a string like "lambda" with the Greek lambda
3399 *** New hook `change-major-mode-after-body-hook', run by
3400 `run-mode-hooks' just before any other mode hooks.
3402 *** Enabled globalized minor modes can be disabled in specific major modes.
3403 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3404 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3406 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3408 ** File-handling changes
3410 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3411 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3412 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3413 argument is supplied (see Trash changes, above).
3415 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3417 ** Tool-bars can display separators.
3418 Tool-bar separators are handled like menu separators in menu-bar maps,
3419 i.e. via menu entries of the form `(menu-item "--")'.
3423 *** Animated images support (currently animated gifs only).
3425 **** `image-animated-p' returns non-nil if an image can be animated.
3427 **** `image-animate' animates a supplied image spec.
3429 **** `image-animate-timer' returns the timer object for an image that
3432 *** `image-extension-data' has been renamed to `image-metadata'.
3433 The old name is an obsolete alias to the new one.
3435 *** Image mode can view any image type that ImageMagick supports.
3436 This requires Emacs to be built with ImageMagick support.
3438 **** New function `imagemagick-types', defined if ImageMagick support
3439 is enabled, returns a list of image file extensions that your
3440 ImageMagick installation supports.
3442 **** New function `imagemagick-register-types' enables ImageMagick
3443 image types in Image mode and in `create-image' and other helper
3446 **** New option `imagemagick-types-inhibit' excludes certain
3447 ImageMagick image types from `imagemagick-register-types'.
3449 **** With ImageMagick support, there are extra Image mode commands to
3450 resize and rotate images: `image-transform-fit-to-height',
3451 `image-transform-fit-to-width', `image-transform-set-rotation', and
3452 `image-transform-set-scale'.
3454 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3455 passes it to the mail user agent function. This argument specifies an
3456 action for returning to the caller after finishing with the mail. For
3457 example, this is used by Rmail to optionally delete a mail window.
3459 ** XML and HTML parsing
3460 If Emacs is compiled with libxml2 support, there are two new
3461 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3462 and `libxml-parse-xml-region' (which parses XML). Both return an
3463 Emacs Lisp parse tree.
3465 ** Networking and encryption changes
3467 *** `open-network-stream' can now be used to open an encrypted stream.
3468 It now accepts an optional `:type' parameter for initiating a TLS
3469 connection, directly or via STARTTLS. To do STARTTLS, additional
3470 parameters (`:end-of-command', `:success', `:capabilities-command')
3471 must also be supplied.
3473 *** New library gnutls.el.
3474 The new function `gnutls-available-p' returns non-nil if Emacs is
3475 built with GnuTLS support. The main entry points are
3476 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3477 these functions through `open-network-stream', because that can
3478 upgrade connections through STARTTLS opportunistically or use plain
3479 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3482 *** New primitive `secure-hash' that supports many secure hash algorithms:
3483 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3484 sha1.el has been removed. The `sha1' feature is provided by default.
3488 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3490 ** Progress reporters can now "spin".
3491 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3492 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3493 time you call `progress-reporter-update' on that progress reporter,
3494 with a nil or omitted VALUE argument, the reporter message is
3495 displayed with a "spinning bar".
3497 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3498 being reverted, even if the buffer has a local `revert-buffer-function'.
3500 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3501 If delayed-warnings-list is non-nil, the command loop calls
3502 `delayed-warnings-hook' after `post-command-hook'. At present, this
3503 is only used by Emacs on some platforms to display warnings during
3504 startup, which might otherwise not be noticed. This uses the
3505 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3507 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3509 ** New function `make-composed-keymap' that constructs a new keymap
3510 from multiple input maps. You can use this to make a keymap that
3511 inherits from multiple maps, eg:
3512 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3514 ** New function `string-prefix-p'.
3515 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3517 ** New reader macro ## that stands for the empty symbol.
3518 This means that the empty symbol can now be read back. Also, #: by itself
3519 (when not immediately followed by a possible symbol character) stands for
3520 an empty uninterned symbol.
3522 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3524 ** The following functions and variables are obsolete:
3526 *** `tooltip-use-echo-area' is obsolete.
3527 Rather than setting this to t, disable Tooltip mode instead.
3529 *** buffer-substring-filters is obsolete.
3530 Use `filter-buffer-substring-functions' instead.
3532 *** `byte-compile-disable-print-circle' is obsolete.
3534 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3535 Use `post-command-hook' instead.
3537 *** `font-lock-maximum-size' is obsolete.
3540 * Changes in Emacs 24.1 on Non-Free Operating Systems
3542 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3543 and also when HOME is set to C:\ by default.
3545 ** New configure.bat options
3547 *** --enable-checking builds Emacs with extra runtime checks.
3549 *** --distfiles specifies files to be included in binary distribution.
3551 *** --without-gnutls disables automatic GnuTLS detection.
3553 *** --lib for general library linkage, works with the USER_LIBS build variable.
3555 ** New make target `dist' to create binary distribution for MS Windows.
3557 ** The Lisp function `w32-default-color-map' is now obsolete.
3558 (It is only used internally in the Emacs C code.)
3560 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3561 reappear on mouse-over. (Requires OS X 10.6 or later.)
3563 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3564 other platforms, rather than inserting its contents into the buffer.
3567 ----------------------------------------------------------------------
3568 This file is part of GNU Emacs.
3570 GNU Emacs is free software: you can redistribute it and/or modify
3571 it under the terms of the GNU General Public License as published by
3572 the Free Software Foundation, either version 3 of the License, or
3573 (at your option) any later version.
3575 GNU Emacs is distributed in the hope that it will be useful,
3576 but WITHOUT ANY WARRANTY; without even the implied warranty of
3577 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3578 GNU General Public License for more details.
3580 You should have received a copy of the GNU General Public License
3581 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3586 paragraph-separate: "[
\f]*$"