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.)
106 ** Key ? also describes prefix bindings like C-h.
109 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
110 because it affects caching of paragraph scanning results as well.
113 ** `apropos-variable' is now `apropos-user-option'
114 `apropos-user-option' shows all user options while `apropos-variable'
115 shows all variables. When called with a universal prefix argument,
116 the two commands swap their behaviors. When `apropos-do-all' is
117 non-nil, they output the same results.
120 ** `eval-defun' on an already defined defcustom calls the :set function,
123 ** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
124 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
125 a list with no limit on its length and level (by using nil values of
126 `print-length' and `print-level'), and inserts additional formats for
127 integers (octal, hexadecimal, and character).
129 ** If the new variable `enable-dir-local-variables' is nil,
130 directory local variables are ignored. May be useful for some modes
131 that want to ignore directory-locals while still respecting file-locals.
134 ** The option `set-mark-default-inactive' has been deleted.
135 This unfinished feature was introduced by accident in Emacs 23.1;
136 simply disabling Transient Mark mode does the same thing.
139 ** `initial-buffer-choice' can now specify a function to set up the
143 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
144 and read-only. Code that might create the *Messages* buffer should
145 call the function `messages-buffer' to do so and set the mode.
147 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
148 You may think of it as a *scratch* buffer whose content is preserved.
149 In fact, it was designed as a replacement for *scratch* buffer and can
150 be used that way by setting `initial-buffer-choice' to `remember-notes'
151 and `remember-notes-buffer-name' to "*scratch*". Without the second
152 change, *scratch* buffer will still be there for notes that do not
153 need to be preserved.
156 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
158 ** ACL support has been added.
160 *** Emacs preserves the ACL entries of files when backing up.
162 *** New functions `file-acl' and `set-file-acl' get and set the ACL
163 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
164 libacl. On MS-Windows, the NT Security APIs are used to emulate the
165 POSIX ACL interfaces.
167 ** New option `scroll-bar-adjust-thumb-portion'.
168 Available only on X, this option allows to control over-scrolling
169 using the scroll bar (i.e. dragging the thumb down even when the end
170 of the buffer is visible).
173 ** New function `add-face-text-property' has been added, which can be
174 used to conveniently prepend/append new face attributes to text.
176 ** In compiled Lisp files, the header no longer includes a timestamp.
178 ** Multi-monitor support has been added.
180 *** New functions `display-monitor-attributes-list' and
181 `frame-monitor-attributes' can be used to obtain information about
182 each physical monitor on multi-monitor setups.
184 *** The functions `display-pixel-width' and `display-pixel-height' now
185 behave consistently among the platforms: they return the pixel width
186 or height for all physical monitors associated with the given display
187 as just they were on X11. To get information for each physical
188 monitor, use the new functions above. Similar notes also apply to
189 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
190 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
192 ** New macro `define-alternatives' can be used to define generic commands.
193 Generic commands are interactive functions whose implementation can be
194 selected among several alternatives, as a matter of user preference.
196 ** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
201 You can change the default by customizing the variable blink-cursor-blinks.
202 Also timers for blinking are stopped when no blinking is done, so Emacs does
203 not consume CPU cycles.
205 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
206 `frame-configuration-to-register'. It offers similar functionality, plus
207 some enhancements, like the ability to restore deleted frames. Command
208 `frame-configuration-to-register' is still available, but unbound.
210 ** The command `quail-help' is deleted. Use `C-h C-\'
211 (`describe-input-method') instead.
213 ** The default value of `comment-use-global-state' is changed to t,
214 and this variable has been marked obsolete.
216 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
217 a 1-letter word, which is an error according to Polish and
218 Czech typography rules. To globally enable this feature, evaluate:
220 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
223 * Editing Changes in Emacs 24.4
226 ** `electric-indent-mode' is enabled by default.
229 ** Uniquify is enabled by default with post-forward-angle-brackets style.
231 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
232 Most commands are still unaware of it, but kill/yank do work on the rectangle.
234 ** C-x TAB enters a transient interactive mode.
235 You can then use the left/right cursor keys to move the block of text.
237 ** `tab-stop-list' is now implicitly extended to infinity by repeating
238 the last step. Its default value is changed to nil which means a tab
239 stop every `tab-width' columns.
242 ** `split-window' is no longer a command, just a non-interactive function.
243 As a command it was a special case of `split-window-below', and as such
244 superfluous. After being reimplemented in Lisp, its interactive form
245 was mistakenly retained.
248 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
249 bound to <f11> and M-<f10>, respectively.
251 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
255 ** New option `visual-order-cursor-movement'.
256 If this is non-nil, cursor motion with arrow keys will follow the
257 visual order of characters on the screen: <left> always moves to the
258 left, <right> always moves to the right, disregarding the surrounding
259 bidirectional context.
261 ** All register commands can now show help with preview.
263 ** New command `kmacro-to-register' to store keyboard macros in registers.
267 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
268 You can pick the name of the function and the variables with `C-x 4 a'.
271 * Changes in Specialized Modes and Packages in Emacs 24.4
274 *** CUA-mode was changed to make use of delete-selection-mode and
275 shift-select-mode. So you can now enable it independently from
276 transient-mark-mode, delete-selection-mode, and shift-select-mode.
277 As a result, cua-highlight-region-shift-only is obsolete
278 (you can disable transient-mark-mode to get the same result).
279 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
281 ** `delete-selection-mode' can be used without transient-mark-mode.
283 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
285 ** SMIE indentation can be customized via `smie-config'.
286 The customization can be guessed by Emacs by providing a sample indented
287 file and letting SMIE learn from it.
289 ** sh-script now uses its SMIE indentation algorithm by default.
291 ** `eshell' now supports visual subcommands and options
292 Eshell has been able to handle "visual" commands (interactive,
293 non-line oriented commands such as top that require display
294 capabilities not provided by eshell) by running them in an Emacs
295 terminal emulator. See `eshell-visual-commands'.
297 This feature has been extended to subcommands and options that make a
298 usually line-oriented command a visual command. Typical examples are
299 "git log" and "git <command> --help" which display their output in a
300 pager by default. See `eshell-visual-subcommands' and
301 `eshell-visual-options'.
303 ** If your Emacs is compiled with libxml2 support, you can use the new
304 built-in web browser `eww'.
306 ** `remember' can now store notes in separates files
307 You can use the new function `remember-store-in-files' within the
308 `remember-handler-functions' option.
310 See `remember-data-directory' and `remember-directory-file-name-format'
311 for new options related to this function.
313 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
315 ~/.emacs.d/timelog replaces ~/.timelog
316 ~/.emacs.d/vip replaces ~/.vip
317 ~/.emacs.d/viper replaces ~/.viper
318 ~/.emacs.d/ido.last replaces ~/.ido.last
319 ~/.emacs.d/kkcrc replaces ~/.kkcrc
320 ~/.emacs.d/quickurls replaces ~/.quickurls
321 ~/.emacs.d/idlwave replaces ~/.idlwave
322 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
323 ~/.emacs.d/places replaces ~/.emacs-places
324 ~/.emacs.d/shadows replaces ~/.shadows
325 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
326 ~/.emacs.d/strokes replaces ~/.strokes
327 ~/.emacs.d/notes replaces ~/.notes
328 ~/.emacs.d/type-break replaces ~/.type-break
329 Also the following files used by the now obsolete otodo-mode.el:
330 ~/.emacs.d/todo-do replaces ~/.todo-do
331 ~/.emacs.d/todo-done replaces ~/.todo-done
332 ~/.emacs.d/todo-top replaces ~/.todo-top
335 ** Delphi mode is now called OPascal mode.
336 *** All delphi-* variables and functions have been renamed to opascal-*.
337 *** `delphi-newline-always-indents' is not supported any more.
338 Use `electric-indent-mode' instead.
339 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
341 ** Eldoc Mode works properly in the minibuffer.
343 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
345 ** completing-read-multiple's separator can now be a regexp.
346 The default separator is changed to allow surrounding spaces around the comma.
348 ** The backtrace debugger and local variables:
349 *** The debugger's `e' command evaluates the code in the context at point.
350 This includes using the lexical environment at point, which means that
351 `e' now lets you access lexical variables as well.
352 *** The backtrace debugger can display local vars with `v'.
356 *** Battery information via the BSD `apm' utility is now supported.
360 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
362 ** Calendar and Diary
364 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
365 `calendar-month-header'.
367 *** New option `calendar-day-header-array'.
369 *** The variable `calendar-font-lock-keywords' is obsolete.
372 *** New variable `diary-from-outlook-function', used by the command
373 `diary-from-outlook'.
375 ** VC and related modes
377 *** In VC directory mode, `D' displays diffs between VC-controlled
378 whole tree revisions.
380 *** In VC directory mode, `L' lists the change log for the current VC
381 controlled tree in a window.
383 *** In VC directory mode, `I' shows a log of changes that will be
384 received with a pull operation.
386 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
387 under current version control system. When called with a prefix
388 argument, you can remove a file from the ignored file list.
390 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
391 because it is moved to vc-cvs.el.
395 *** New macro cl-tagbody.
398 *** letf is now just an alias for cl-letf.
402 *** Calc by default now uses the Gregorian calendar for all dates, and
403 uses January 1, 1 AD as its day number 1. Previously Calc used the
404 Julian calendar for dates before September 14, 1752, and it used
405 December 31, 1 BC as its day number 1; the new scheme is more
406 consistent with Calendar's calendrical system and day numbering.
408 *** The new variable `calc-gregorian-switch' lets you configure the
409 date when Calc switches from the Julian to the Gregorian calendar.
410 Nil, the default value, means to always use the Gregorian calendar.
411 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
414 *** Support for ISO 8601 dates.
418 *** `desktop-auto-save-timeout' defines the number of seconds idle time
419 before auto-save of the desktop.
421 *** `desktop-restore-frames', enabled by default, allows saving and
422 restoring the frame/window configuration (frameset). Additional options
423 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
424 and `desktop-restore-forces-onscreen' offer further customization.
428 *** New minor mode `dired-hide-details-mode' hides details.
432 *** New option `erc-accidental-paste-threshold-seconds'.
433 If set to a number, this can be used to avoid accidentally paste large
434 amounts of data into the ERC input.
438 *** New option `epa-mail-aliases'.
440 You can set this to a list of alias expansions for keys to use
441 in `epa-mail-encrypt'.
443 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
444 that means: when one of the recipients of the message being encrypted
445 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
447 If one element of the variable's value is ("foo@bar.com"),
448 that means: when one of the recipients of the message being encrypted
449 is `foo@bar.com', ignore that name as regards encryption.
450 This is useful to avoid a query when you have no key for that name.
453 ** New F90 mode option `f90-smart-end-names'.
455 ** Icomplete is a bit more like Ido.
456 *** key bindings to navigate through and select the completions.
457 *** The icomplete-separator is customizable, and its default has changed.
458 *** Removed icomplete-show-key-bindings.
459 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
460 (setq icomplete-with-completion-tables '(internal-complete-buffer))
461 will revert to the old behavior.
464 ** New features for Octave mode:
465 *** Font locking for texinfo comments and new keywords
466 *** Completion in Octave file buffers
468 *** Jump to definition
469 *** Documentation lookup/search
470 *** Code cleanup and various bug fixes
473 *** Ido has a manual now.
474 *** `ido-use-virtual-buffers' takes a new value 'auto.
475 *** `ido-decorations' has been slightly extended to give a bit more control.
479 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
480 visit the next image file and the previous image file in the same
481 directory, respectively.
483 *** New commands to show specific frames of multi-frame images.
484 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
485 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
487 *** New commands to speed up, slow down, or reverse animation.
490 *** The command `image-mode-fit-frame' deletes other windows.
491 When toggling, it restores the frame's previous window configuration.
492 It also has an optional frame argument, which can be used by Lisp
493 callers to fit the image to a frame other than the selected frame.
497 *** New face `info-index-match' is used to highlight matches in index
498 entries displayed by `Info-index-next', `Info-virtual-index' and
503 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
504 will cycle through faces in `hi-lock-face-defaults' without prompting.
507 *** New global command `M-s h .' (`highlight-symbol-at-point')
508 highlights the symbol found near point without prompting,
509 using the next face automatically.
511 ** Search and Replace
513 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
514 starts a symbol (identifier) incremental search forward with the
515 symbol found near point added to the search string initially.
517 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
518 and adds it to the search string.
520 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
521 between nil and the value of the option `search-invisible' (or `open'
524 *** `query-replace' skips invisible text when `search-invisible' is nil,
525 and opens overlays with hidden text when `search-invisible' is `open'.
527 *** A negative prefix arg of replacement commands replaces backward.
528 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
529 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
532 *** By default, prefix arguments do not now terminate Isearch mode.
533 Set `isearch-allow-prefix' to nil to restore old behavior.
535 *** More Isearch commands accept prefix arguments, namely
536 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
539 *** Word search now matches whitespace at the beginning/end
540 of the search string if it contains leading/trailing whitespace.
541 In an incremental word search or when using a non-nil LAX argument
542 of `word-search-regexp', the lax matching can also match part of
543 the first word (in addition to the lax matching of the last word).
544 The same rules are now applied to the symbol search with the difference
545 that it matches symbols, and non-symbol characters between symbols.
547 ** MH-E has been updated to MH-E version 8.5.
548 See MH-E-NEWS for details.
551 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
552 Customize `unrmail-mbox-format' to change this.
555 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
556 of how Rmail displays non-MIME messages.
559 ** New function `ses-rename-cell' to give SES cells arbitrary names.
561 ** trace-function was largely rewritten.
562 New features include:
563 - no prompting for the destination buffer, unless a prefix-arg was used.
564 - additionally to prompting for a destination buffer, when a prefix-arg is
565 used, the user can enter a "context", i.e. Lisp expression whose value at the
566 time the function is entered/exited will be printed along with the function
567 name and arguments. Useful to trace the value of (current-buffer) or
568 (point) when the function is invoked.
570 ** New command `delete-duplicate-lines' has new types of operation:
571 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
572 it works like the utility `uniq'. Otherwise by default it deletes
573 duplicate lines everywhere in the region without regard to adjacency.
574 When its arg KEEP-BLANKS is non-nil (when called interactively with
575 C-u C-u C-u), duplicate blank lines are preserved.
577 ** New `cycle-spacing' command allows cycling between having just one
578 space, no spaces, or reverting to the original spacing. Like
579 `just-one-space' command it can handle or ignore newlines and
580 leave different number of spaces.
582 ** Todo mode has been rewritten and enhanced.
583 New features include:
584 - support for multiple todo files and archive files of done items;
585 - renaming, reordering, moving, merging, and deleting categories;
586 - sortable tabular summaries of categories and the types of items they contain;
587 - cross-category lists of items filtered by specific criteria;
588 - more fine-grained interaction with the Emacs diary, by being able to decide
589 for each todo item whether it appears in the Fancy Diary display;
590 - highly flexible new item insertion and item editing;
591 - moving items between categories, storing done items in their category or in
592 archive files, undoing or unarchiving done items;
593 - reprioritizing items by inputting a numerical priority;
594 - extensive customizability of operation and display, including numerous faces.
595 The Todo mode user manual describes all commands and most user options.
596 To support some of these features, a new file format is used, which is
597 incompatible with the old format; however, you can convert old todo and done
598 item files to the new format on initializing the first new todo file, or at any
599 later time with the provided conversion command. The old version of
600 todo-mode.el has been made obsolete and renamed otodo-mode.el.
604 *** The experimental url syntax for remote file names is withdrawn.
607 *** New connection method "adb", which allows to access Android
608 devices by the Android Debug Bridge. The variable `tramp-adb-program'
609 can be used to adapt the path of the "adb" program, if needed.
611 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
612 "scpc" and "rsyncc" are discontinued. The ssh option
613 "ControlMaster=auto" is set automatically in all ssh-based methods,
617 *** Handlers for `file-acl' and `set-file-acl' for remote machines
618 which support POSIX ACLs.
621 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
622 for remote machines which support filesystem notifications.
626 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
628 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
632 *** The commands `woman-default-faces' and `woman-monochrome-faces'
633 are obsolete. Customize the `woman-*' faces instead.
637 *** Added Eshell-Tramp module
638 External su and sudo commands are now the default; the internal,
639 Tramp-using variants can still be used by enabling the eshell-tramp
644 *** The format of `archive-contents' files, generated by package
645 repositories, has changed to allow a new (fifth) element in the data
646 vectors, containing an associative list with extra properties.
648 *** `describe-package' buffer uses the `:url' extra property to
649 display a `Homepage' header, if it's present.
651 ** New term.el option `term-suppress-hard-newline'.
657 **** The cpp-root project now supports executing a compile command.
658 It can be set through the new :compile-command slot or the
659 buffer-local variable `compile-command'.
661 **** Better selection of include directories for the 'linux' project.
662 Include directories now support out-of-tree build directories and
663 target architecture auto-detection.
667 **** Improved detection of used namespaces in current scope in C++.
669 **** Parsing of default values for variables and function arguments in C/C++.
670 They are also displayed by the summarize feature in the modeline.
672 **** Improved parsing of function pointers in C/C++.
673 This also includes parsing of function pointers as function arguments.
675 **** Parsing of C/C++ preprocessor macros which open new scope.
676 For example, this enables parsing of macros which open new namespaces.
678 **** Support for 'this' pointer in inline member functions in C++.
680 ** Obsolete packages:
682 *** Iswitchb is made obsolete by icomplete-mode.
684 *** longlines.el is obsolete; use visual-line-mode instead.
689 *** terminal.el is obsolete; use term.el instead.
691 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
696 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
699 *** The Info-edit command is obsolete. Editing Info nodes by hand
700 has not been relevant for some time.
704 *** `explicit-bash-args' now always defaults to use --noediting.
705 During initialization, Emacs no longer expends a process to decide
706 whether it is safe to use Bash's --noediting option. These days
707 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
710 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
714 *** New option `imenu-generic-skip-comments-and-strings'.
718 *** New option `ruby-encoding-magic-comment-style'.
720 *** New option `ruby-custom-encoding-magic-comment-template'.
724 *** Improved syntax highlighting and indentation.
726 *** Add more Ruby file types to `auto-mode-alist'.
728 *** New option `ruby-align-to-stmt-keywords'.
732 *** Better indentation of multiple-variable declarations.
733 If declaration spans several lines, variables on the following lines
734 are lined up to the first one.
736 *** We now recognize and better indent continuations in array
739 *** New option `js-switch-indent-offset`.
742 * New Modes and Packages in Emacs 24.4
744 ** New `superword-mode' in subword.el
745 `superword-mode' overrides the default word motion commands to treat
746 symbol_words as a single word, similar to what `subword-mode' does and
747 using the same internal functions.
749 ** New nadvice.el package offering lighter-weight advice facilities.
751 - add-function/remove-function which can be used to add/remove code on any
752 function-carrying place, such as process-filters or `<foo>-function' hooks.
753 - advice-add/advice-remove to add/remove a piece of advice on a named function,
754 much like `defadvice' does.
756 ** New frameset.el package.
757 It provides a set of operations to save a frameset (the state of all
758 or a subset of the existing frames and windows, somewhat similar to a
759 frame configuration), both in-session and persistently, and restore it
760 at some point in the future.
763 ** The package filenotify.el provides an interface for file system
764 notifications. It requires, that Emacs is compiled with one of the
765 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
768 * Incompatible Lisp Changes in Emacs 24.4
770 ** `kill-region' lost its `yank-handler' optional argument.
772 ** `(input-pending-p)' no longer runs other timers which are ready to
773 run. The new optional CHECK-TIMERS param allows for the prior behavior.
775 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
777 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
778 Some languages match those as »...« and others as «...» so better stay neutral.
780 ** The default file coding for Emacs Lisp files is now utf-8.
781 (See file-coding-system-alist.) In most cases, this change is transparent, but
782 files that contain unusual characters without specifying an explicit coding
783 system may fail to load with obscure errors.
784 You should either convert them to utf-8 or add an explicit `coding:' cookie.
786 ** overriding-terminal-local-map does not replace the local keymaps any more.
787 It used to disable the minor mode, major mode, and text-property keymaps,
788 whereas now it simply has higher precedence.
790 ** Default process filters and sentinels are not nil any more.
791 Instead they default to a function which does what the nil value used to do.
793 ** `read-event' does not return decoded chars in ttys any more.
794 Just as was the case in Emacs-22 and before, decoding of tty input according to
795 keyboard-coding-system is not performed in read-event any more. But contrary
796 to that past, it is still done before input-decode-map/function-key-map/...
798 ** Removed inhibit-local-menu-bar-menus.
800 ** frame-local variables that affect redisplay do not work any more.
801 More specifically, the redisplay does not bother to check for a frame-local
802 value when looking up variables.
804 ** nil and "unbound" are indistinguishable in symbol-function.
805 `symbol-function' never signals `void-function' any more.
806 `fboundp' returns non-nil if the symbol was `fset' to nil.
808 ** `defadvice' does not honor the `freeze' flag and cannot advise
809 special-forms any more.
811 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
812 VAR was bound to nil which was not tremendously useful and just lead to
813 spurious warnings about an unused var.
815 ** The return value of `backup-buffer' has changed.
816 The second argument is no longer an SELinux context, instead it is an
817 alist of extended attributes as returned by the new function
818 `file-extended-attributes'. The attributes can be applied to another
819 file using `set-file-extended-attributes'.
821 ** `visited-file-modtime' now returns -1 for nonexistent files.
822 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
823 in the presence of files with negative time stamps.
825 ** The cars of the elements in `interpreter-mode-alist' are now treated
826 as regexps rather than literal strings. Technically this is an
827 incompatible change, but unless you are using interpreter-mode-alist
828 for something (not just adding elements to it), it ought not to affect you.
831 * Lisp Changes in Emacs 24.4
833 ** New option `load-prefer-newer', if non-nil, means that when both
834 .el and .elc versions of a file exist, rather than `load' always
835 choosing the .elc version, it will choose whichever is newer
836 (unless you explicitly specify one or the other).
838 ** New function get-pos-property.
840 ** New hook `pre-redisplay-function'.
843 ** Functions that pop up menus and dialogs now work on all terminal types,
845 This includes `x-popup-menu', `x-popup-dialog', `message-box',
848 The function `display-popup-menus-p' will now return non-nil for a
849 display or frame whenever a mouse is supported on that display or
852 ** New bool-vector set operation functions:
853 *** `bool-vector-exclusive-or'
854 *** `bool-vector-union'
855 *** `bool-vector-intersection'
856 *** `bool-vector-set-difference'
857 *** `bool-vector-not'
858 *** `bool-vector-subsetp'
859 *** `bool-vector-count-consecutive'
860 *** `bool-vector-count-population'
862 ** Comparison functions =, <, >, <=, >= now take many arguments.
864 ** The second argument of `eval' can now be a lexical-environment.
866 ** `with-demoted-errors' takes an additional argument `format'.
868 ** New function `define-error'.
870 ** New hook `tty-setup-hook'.
873 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
875 ** New library helpers.el for misc helper functions
876 *** `hash-table-keys'
877 *** `hash-table-values'
882 *** `string-trim-left'
883 *** `string-trim-right'
886 ** Obsoleted functions:
889 *** `lisp-complete-symbol'
891 *** `minibuffer-completion-contents'
892 *** `isearch-nonincremental-exit-minibuffer'
893 *** `isearch-filter-visible'
894 *** `generic-make-keywords-list'
896 ** `with-wrapper-hook' is obsoleted by `add-function'.
897 The few hooks that used with-wrapper-hook are replaced as follows:
898 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
899 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
900 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
902 ** `byte-compile-interactive-only-functions' is now obsolete.
903 It has been replaced by the symbol property 'interactive-only.
905 ** `split-string' now takes an optional argument TRIM.
906 The value, if non-nil, is a regexp that specifies what to trim from
907 the start and end of each substring.
909 ** New function `string-suffix-p'.
911 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
913 ** Support for filesystem notifications.
914 Emacs now supports notifications of filesystem changes, such as
915 creation, modification, and deletion of files. This requires the
916 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
917 MS-Windows systems, this is supported for Windows XP and newer
920 ** Changes in autorevert.el
923 *** If Emacs is compiled with file notification support, notifications
924 are used instead of checking the time stamp of the files. You can
925 disable this by setting the user option `auto-revert-use-notify' to
926 nil. Alternatively, a regular expression of directories to be
927 excluded from file notifications can be specified by
928 `auto-revert-notify-exclude-dir-regexp'.
931 *** The new user option `auto-revert-remote-files' enables reversion
932 of remote files when set to non-nil.
936 *** The function `face-spec-set' is now analogous to `setq' for face specs.
937 Its third arg now accepts values specifying exactly which face spec to
938 set (defface, custom, or user spec), and it directly sets the relevant
939 property using the supplied face spec.
941 *** Face specs set via Custom themes now replace the `defface' spec
942 rather than inheriting from it (as do face specs set via Customize).
944 *** New face characteristic (supports :underline (:style wave))
945 specifies whether or not the terminal can display a wavy line.
947 *** New face spec attribute :distant-foreground
948 specifies foreground to use if background color is near the foreground
949 color that would otherwise have been used.
954 *** `image-animated-p' is now `image-multi-frame-p'.
955 It returns non-nil for any image that contains multiple frames,
956 whether or not it specifies a frame delay.
959 *** When animating images that do not specify a frame delay,
960 Emacs uses `image-default-frame-delay'.
963 *** New functions `image-current-frame' and `image-show-frame' for getting
964 and setting the current frame of a multi-frame image.
966 *** You can change the speed of animated images.
970 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
971 **** object-name -> eieio-object-name
972 **** object-class -> eieio-object-class
973 **** object-class-fast -> eieio--object-class
974 **** object-name-string -> eieio-object-name-string
975 **** object-num-slots -> eieio--object-num-slots
976 **** object-set-name-string -> eieio-object-set-name-string
977 **** class-parent -> eieio-class-parent
978 **** class-parents -> eieio-class-parents
979 **** class-children -> eieio-class-children
980 **** class-num-slots -> eieio--class-num-slots
981 **** class-precedence-list -> eieio-class-precedence-list
982 **** All generated class-* and object-* field accessors are now
983 prefixed with `eieio-' as well.
985 *** Obsoleted functions:
987 **** class-direct-subclasses
988 **** class-direct-superclasses
990 ** Changes in encoding and decoding of text
993 *** New coding-system `prefer-utf-8'.
994 This is like `undecided' but prefers UTF-8 on decoding if the text to
995 be decoded does not contain any invalid UTF-8 sequences. On encoding,
996 any non-ASCII characters are automatically encoded as UTF-8.
999 *** New attributes of coding-systems whose type is `undecided'.
1000 Two new attributes, `:inhibit-null-byte-detection' and
1001 `:inhibit-iso-escape-detection', determine how to detect encoding of
1002 text that includes null bytes and ISO-2022 escape sequences,
1003 respectively. Each of these attributes can be either nil, zero, or
1004 t. If it is t, decoding text ignores null bytes and, respectively,
1005 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1006 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1007 text is encoded in one of the ISO-2022 encodings, such as
1008 iso-2022-7bit. If the value is zero, Emacs consults the variables
1009 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1011 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1012 UTF-8 encoding and decoding, whenever possible.
1014 These attributes are only meaningful for coding-systems of type
1015 `undecided'. (The type of a coding-system is determined by its
1016 `:coding-type' attribute and can be accessed by calling the
1017 `coding-system-type' function.)
1019 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
1020 with the same interpretation as the returned value of `visited-file-modtime'.
1022 ** time-to-seconds is not obsolete any more.
1023 ** New functions special-form-p and macrop.
1024 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1025 text-property on the first char.
1027 ** The `defalias-fset-function' property lets you catch calls to defalias
1028 and redirect them to your own function instead of `fset'.
1030 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1031 When you edit DIR/FILE, Emacs normally creates a symbolic link
1032 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1033 is being edited. Formerly, if there was already a non-symlink file
1034 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1035 through DIR/.#FILE.9. These fallbacks have been removed, so that
1036 Emacs now no longer locks DIR/FILE in that case.
1038 On file systems that do not support symbolic links, the lock is now a
1039 regular file with contents being what would have been in the symlink.
1041 ** The 9th element returned by `file-attributes' is now unspecified.
1042 Formerly, it was t if the file's gid would change if file were deleted
1043 and recreated. This value has been inaccurate for years on many
1044 platforms, and nobody seems to have noticed or cared.
1046 ** The function `file-ownership-preserved-p' now has an optional
1047 argument GROUP which causes it check for file group too. This can be
1048 used in place of the 9th element of `file-attributes'.
1050 ** New functions `group-gid' and `group-real-gid'.
1052 ** The 6th argument to `copy-file' has been renamed to
1053 `preserve-extended-attributes' as it now handles both SELinux context
1056 ** The `common-substring' argument of display-completion-list is obsolete.
1057 Either use `completion-all-completions' which already returns highlighted
1058 strings (including for partial or substring completion) or call
1059 `completion-hilit-commonality' to add the highlight.
1061 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1063 *** The package descriptor and name of global variables, constants,
1064 and functions should be separated by two hyphens if the symbol is not
1065 meant to be used by other packages.
1068 * Changes in Emacs 24.4 on Non-Free Operating Systems
1070 ** The procedure for building Emacs on MS-Windows has changed.
1071 It is now built by running the same configure script as on all other
1072 platforms. This requires the MSYS environment and MinGW development
1073 tools. See the updated instructions in nt/INSTALL for details.
1075 Using the Posix configure script and Makefile's also means a change in
1076 the directory structure of the Emacs installation on Windows. It is
1077 now the same as on GNU and Unix systems. In particular, the auxiliary
1078 programs, such as cmdproxy.exe and hexl.exe, are in
1079 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1080 version), version-independent site-lisp is in share/emacs/site-lisp,
1081 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1082 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1083 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1084 directories and will find the files in there automatically; there's no
1085 need to set any variables due to this change.)
1088 ** Emacs on Windows 2000 and later can now access files and directories
1089 whose names cannot be encoded in the current system codepage.
1091 The new variable `w32-unicode-filenames' controls this feature: if it
1092 is t, Emacs uses Unicode APIs to pass file names to system calls,
1093 which lifts the limitation of file names to the current locale.
1096 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1097 The backtrace is written to the 'emacs_backtrace.txt' file in the
1098 directory where Emacs was running.
1101 ** The variable `buffer-file-type' is no longer supported.
1102 Setting it has no effect, and %t in the mode-line format is ignored.
1103 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1104 modifying it has no effect.
1107 ** Lock files now work on MS-Windows.
1108 This allows to avoid losing your edits if the same file is being
1109 edited in another Emacs session or by another user. See the node
1110 "Interlocking" in the Emacs User Manual for the details. To disable
1111 file locking, customize `create-lockfiles' to nil.
1113 ** Improved fullscreen support on Mac OS X.
1114 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1115 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1116 native is the default.
1119 * Installation Changes in Emacs 24.3
1121 ** The default X toolkit is now Gtk+ version 3.
1122 If you don't pass `--with-x-toolkit' to configure, or if you use
1123 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1124 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1125 You can explicitly require a specific version by passing
1126 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1128 ** New configure option `--enable-link-time-optimization', to utilize
1129 an appropriate feature provided by GCC since version 4.5.0.
1131 ** New configure option `--without-all' to disable most of the optional
1132 features (image support, etc.) that are normally enabled by default.
1134 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1135 Emacs). If building with GCC, this enables compile-time checks that
1136 warn/give errors about possibly-questionable C code. On a recent GNU
1137 system there should be no warnings; on older and on non-GNU systems
1138 the results may be useful to developers.
1140 ** The configure option `--enable-use-lisp-union-type' has been
1141 renamed to `--enable-check-lisp-object-type', as the resulting
1142 Lisp_Object type no longer uses a union to implement the compile time
1143 check that this option enables.
1145 ** The configure option `--disable-maintainer-mode' has been removed,
1146 as it was confusingly-named and rarely useful.
1148 ** The configure options `--program-prefix', `--program-suffix', and
1149 `--program-transform-name' apply to more than just the installed
1150 binaries. Now they also affect the man pages, icons, and the
1151 etc/emacs.desktop file; but not the info pages, since this would break
1152 links between the various manuals.
1154 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1155 overwriting "emacs" in the installation bin/ directory with a link
1158 ** Emacs uses libtinfo in preference to libncurses, if available.
1160 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1161 /usr/pkg/lib to the linker search path. You must add them yourself if
1164 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1165 (from the bin and libexec directories, respectively). The former is
1166 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1169 * Startup Changes in Emacs 24.3
1171 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1172 lisp/ directory. There should not be any there anyway. If you have
1173 been adding them there, put them somewhere else; e.g., site-lisp.
1175 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1178 * Changes in Emacs 24.3
1182 *** `C-h f' (`describe-function') can now perform autoloading.
1183 When this command is called for an autoloaded function whose docstring
1184 contains a key substitution construct, that function's library is
1185 automatically loaded, so that the documentation can be shown
1186 correctly. To disable this, set `help-enable-auto-load' to nil.
1188 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1189 even after their associated libraries have been loaded (and the
1190 autoloads have been redefined as functions).
1194 *** Images displayed via ImageMagick now support transparency and the
1195 :background image specification property.
1197 *** When available, ImageMagick support is automatically enabled.
1198 It is no longer necessary to call `imagemagick-register-types'
1199 explicitly to install ImageMagick image types; that function is called
1200 automatically at startup, or when customizing an imagemagick- option.
1202 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1203 ImageMagick to view images. (You must call `imagemagick-register-types'
1204 afterwards if you do not use customize to change this.)
1206 *** The new variable `imagemagick-enabled-types' also affects which
1207 ImageMagick types are treated as images. The function
1208 `imagemagick-filter-types' returns the list of types that will be
1211 *** ImageMagick images now support the :max-width and :max-height
1214 *** Some data types aren't auto-detected by ImageMagick. Adding
1215 :format to `create-image' may help if the content type is in the
1216 new variable `image-format-suffixes'.
1220 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1221 next and previous path separator, respectively.
1223 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1224 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1225 non-nil before enabling the mode.
1229 *** New option `mode-line-default-help-echo' specifies the help text
1230 (shown in a tooltip or in the echo area) for any part of the mode line
1231 that does not have its own specialized help text.
1233 *** You can now click mouse-3 in the coding system indicator to invoke
1234 `set-buffer-file-coding-system'.
1236 ** Server and client
1238 *** emacsclient now obeys string values for `initial-buffer-choice',
1239 if it is told to open a new frame without specifying any file to visit
1240 or expression to evaluate.
1242 *** New option `server-auth-key' specifies a shared server key.
1244 ** Emacs now generates backtraces on fatal errors.
1245 On encountering a fatal error, Emacs now outputs a textual description
1246 of the fatal signal, and a short backtrace on platforms like glibc
1247 that support backtraces.
1249 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1250 This minor mode replaces `toggle-read-only', which is now obsolete.
1252 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1253 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1254 respectively, without exiting from the prompt.
1256 ** In the Package Menu, newly-available packages are listed as "new",
1257 and sorted above the other "available" packages by default.
1259 ** If your Emacs was built from a bzr checkout, the new variable
1260 `emacs-bzr-version' contains information about the bzr revision used.
1262 ** New option `create-lockfiles' specifies usage of lockfiles.
1263 It defaults to t. Changing it to nil inhibits the creation of lock
1264 files (use this with caution).
1266 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1267 variables on remote hosts.
1269 ** The entry for PCL-CVS has been removed from the Tools menu.
1270 The PCL-CVS commands are still available via the keyboard.
1272 ** Using "unibyte: t" in Lisp source files is obsolete.
1273 Use "coding: raw-text" instead.
1275 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1276 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1277 The previous binding, introduced in Emacs 24.1, was a mistake, because
1278 `C-c LETTER' bindings are reserved for user customizations.
1280 ** Internationalization
1282 *** New language environment: Persian.
1284 *** New input method `vietnamese-vni'.
1286 ** Nextstep (GNUstep / Mac OS X) port
1288 *** Support for fullscreen and the frame parameter fullscreen.
1290 *** A file dialog is used for open/save operations initiated from the
1294 * Editing Changes in Emacs 24.3
1296 ** Search and Replace
1298 *** Non-regexp Isearch now performs "lax" space matching.
1299 Each sequence of spaces in the supplied search string may match any
1300 sequence of one or more whitespace characters, as specified by the
1301 variable `search-whitespace-regexp'. (This variable is also used by a
1302 similar existing feature for regexp Isearch.)
1304 *** New Isearch command `M-s SPC' toggles lax space matching.
1305 This applies to both ordinary and regexp Isearch.
1307 *** New option `replace-lax-whitespace'.
1308 If non-nil, `query-replace' uses flexible whitespace matching too.
1311 *** Global `M-s _' starts a symbol (identifier) incremental search,
1312 and `M-s _' in Isearch toggles symbol search mode.
1313 `M-s c' in Isearch toggles search case-sensitivity.
1315 ** Navigation commands
1317 *** New binding `M-g c' for `goto-char'.
1319 *** New binding `M-g TAB' for `move-to-column'.
1321 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1322 interactively with no prefix arg. Previously, it moved to column 1.
1324 ** New option `yank-handled-properties' allows processing of text
1325 properties on yanked text, in ways that are more general than just
1326 removing them (as is done by `yank-excluded-properties').
1328 ** New option `delete-trailing-lines' specifies whether
1329 M-x delete-trailing-whitespace should delete trailing lines at the end
1330 of the buffer. It defaults to t.
1332 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1334 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1335 `ucs-insert' is now an obsolete alias for `insert-char'.
1337 ** The `z' key no longer has a binding in most special modes.
1338 It used to be bound to `kill-this-buffer', but `z' is too easy to
1341 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1342 It copies the region-rectangle as the last rectangle kill.
1346 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1348 *** New option `register-separator' specifies the register containing
1349 the text to put between collected texts for use with
1350 M-x append-to-register and M-x prepend-to-register.
1353 * Changes in Specialized Modes and Packages in Emacs 24.3
1355 ** Common Lisp emulation (CL)
1357 *** CL's main entry is now (require 'cl-lib).
1358 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1359 i.e., all its definitions have the "cl-" prefix (and internal definitions
1360 use the "cl--" prefix).
1362 If `cl' provided a feature under the name `foo', then `cl-lib'
1363 provides it under the name `cl-foo' instead; with the exceptions of the
1364 few `cl' definitions that had to use `foo*' to avoid conflicts with
1365 pre-existing Elisp entities. These have been renamed to `cl-foo'
1366 rather than `cl-foo*'.
1368 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1369 provide the old, non-prefixed names. Some exceptions are listed below:
1371 *** `cl-flet' is not like `flet' (which is deprecated).
1372 Instead it obeys the behavior of Common-Lisp's `flet'.
1373 In particular, in cl-flet function definitions are lexically scoped,
1374 whereas in flet the scoping is dynamic.
1376 *** `cl-labels' is slightly different from `labels'.
1377 The difference is that it relies on the `lexical-binding' machinery
1378 (as opposed to the `lexical-let' machinery used previously) to capture
1379 definitions in closures, so such closures will only work if `lexical-binding'
1382 *** `cl-letf' is not exactly like `letf'.
1383 The only difference is in details that relate to some deprecated usage
1384 of `symbol-function' in place forms.
1386 *** `progv' was rewritten to use the `let' machinery.
1387 A side effect is that variables without corresponding values are bound
1388 to nil rather than being made unbound.
1390 *** The following methods of extending `setf' are obsolete
1391 (use features from gv.el instead):
1392 `define-modify-macro' (use `gv-letplace')
1393 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1394 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1395 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1399 *** Changes are now highlighted using the same color scheme as in
1400 modern VCSes. Deletions are displayed in red (new faces
1401 `diff-refine-removed' and `smerge-refined-removed', and new definition
1402 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1403 and `smerge-refined-added', and new definition of `diff-added').
1405 *** The variable `diff-use-changed-face' defines whether to use the
1406 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1407 changes in context diffs.
1409 *** The new command `diff-delete-trailing-whitespace' removes trailing
1410 whitespace introduced by a diff.
1412 ** Ediff now uses the same color scheme as Diff mode.
1416 A new version of python.el, which provides several new features, including:
1417 per-buffer shells, better indentation, Python 3 support, and improved
1418 shell-interaction compatible with iPython (and virtually any other
1421 *** Some user options have been replaced/renamed, including (old -> new):
1422 **** python-indent -> python-indent-offset
1423 **** python-guess-indent -> python-indent-guess-indent-offset
1424 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1425 **** python-use-skeletons -> python-skeleton-autoinsert
1427 *** Some user options have been removed, including:
1429 **** `python-indent-string-contents': Strings are never indented.
1431 **** `python-honour-comment-indentation':
1432 Comments are always considered as indentation markers.
1434 **** `python-continuation-offset': Indentation is automatically
1435 calculated in a pep8 compliant way depending on the context.
1437 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1438 Have no direct mapping as the shell interaction is completely different.
1440 **** `python-python-command', `python-jython-command':
1441 Replaced by `python-shell-interpreter'.
1443 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1444 `python-pdbtrack-minor-mode-string', `python-source-modes':
1447 *** Some commands have been replaced (old -> new):
1448 **** python-insert-class -> python-skeleton-class
1449 **** python-insert-def -> python-skeleton-def
1450 **** python-insert-for -> python-skeleton-for
1451 **** python-insert-if -> python-skeleton-if
1452 **** python-insert-try/except -> python-skeleton-try
1453 **** python-insert-try/finally -> python-skeleton-try
1454 **** python-insert-while -> python-skeleton-while
1455 **** python-find-function -> python-nav-jump-to-defun
1456 **** python-next-statement -> python-nav-forward-sentence
1457 **** python-previous-statement -> python-nav-backward-sentence
1458 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1459 **** python-end-of-defun-function -> python-nav-end-of-defun
1460 **** python-send-buffer -> python-shell-send-buffer
1461 **** python-send-defun -> python-shell-send-defun
1462 **** python-send-region -> python-shell-send-region
1463 **** python-send-region-and-go -> emulate with python-shell-send-region
1464 and python-shell-switch-to-shell
1465 **** python-send-string -> python-shell-send-string
1466 **** python-switch-to-python -> python-shell-switch-to-shell
1467 **** python-describe-symbol -> python-eldoc-at-point
1471 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1473 *** The D-Bus object manager interface is implemented.
1475 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1476 if their value does not fit into Emacs's integer range.
1478 *** The function `dbus-call-method' is now non-blocking.
1479 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1481 *** Signals can also be sent as unicast messages.
1483 *** The argument list of `dbus-register-signal' has been extended,
1484 according to the new match rule types of D-Bus.
1486 *** `dbus-init-bus' supports private connections.
1488 *** There is a new function `dbus-setenv'.
1490 ** `desktop-path' no longer includes the "." directory.
1491 Desktop files are now located in ~/.emacs.d by default.
1495 *** `dired-do-async-shell-command' executes each file sequentially
1496 if the command ends in `;' (when operating on multiple files).
1497 Otherwise, it executes the command on each file in parallel.
1499 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1500 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1503 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1504 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1505 mark/unmark/flag all files in the active region.
1507 *** The minibuffer default for `=' (`dired-diff') has changed.
1508 It is now the backup file for the file at point, if one exists.
1509 In Transient Mark mode the default is the file at the active mark.
1511 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1512 The global binding for `M-=', `count-words-region' is in effect.
1516 *** New module "notifications", which can send a notification when you
1517 receive a private message or your nickname is mentioned.
1519 *** ERC will look up server/channel names via auth-source and use any
1522 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1523 only applies to messages sent by lurkers.
1525 ** reStructuredText mode
1527 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1528 fontification, comment handling, and customization have all been revised
1531 *** Support for `imenu' and `which-function-mode'.
1533 *** The reStructuredText syntax is more closely covered.
1534 Sphinx support has been improved.
1536 *** `rst-insert-list' inserts new list or continues existing lists.
1538 *** A negative prefix argument always works for `rst-adjust'.
1540 *** The window configuration is reset after displaying a TOC.
1542 *** The constant `rst-version' describes the rst.el package version.
1546 *** Support for percent literals and recognition of regular expressions
1547 in method calls without parentheses with more methods, including Cucumber
1550 *** Improved syntax highlighting and indentation.
1552 *** New command `ruby-toggle-block', bound to `C-c {'.
1554 *** Some non-standard keybindings/commands have been removed:
1556 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1558 **** `ruby-mark-defun'; use `mark-defun'.
1560 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1561 appropriate settings for the variables `beginning-of-defun-function'
1562 and `end-of-defun-function'.
1564 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1565 `reindent-then-newline-and-indent' and `newline' have been removed.
1567 ** Shell Script mode
1569 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1571 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1573 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1577 *** The free software compiler GHDL is supported (and now the default).
1579 *** Support for the VHDL-AMS packages has been added/updated.
1581 *** Updated to the 2002 revision of the VHDL standard.
1583 *** Accepts \r and \f as whitespace.
1587 *** The faces used by Apropos are now directly customizable.
1588 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1589 see the `apropos' Custom group for details.
1591 *** The old options whose values specified faces to use have been removed
1592 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1596 *** This package has been rewritten to use Tabulated List mode.
1598 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1599 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1603 *** Algebraic simplification mode is now the default.
1604 To restrict to the limited simplifications given by the former
1605 default simplification mode, use `m I'.
1609 *** You can customize the header text that appears above each calendar month.
1610 See the variable `calendar-month-header'.
1612 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1614 *** The calendars produced by cal-html include holidays.
1615 Customize `cal-html-holidays' to change this.
1619 *** The major modes from the parser generators "Bovine" and "Wisent"
1620 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1621 are in `auto-mode-alist', and the corresponding manuals are included.
1625 **** Menu support for the "Configuration" feature. This allows users to
1626 choose the active configuration (such as debug or install) from the menu.
1628 **** New command `ede-set' to interactively set project-local variables.
1630 **** Support for compiling, debugging, and running in "generic" projects.
1632 **** Autoconf editing support for M4 macros with complex arguments.
1634 **** Compilation support for the "linux" project type.
1636 **** "simple" projects have been removed; use "generic" projects instead.
1640 **** Support for parsing #include statements inside a namespace in C/C++.
1642 **** Improved support for 'extern "C"' declarations in C/C++.
1644 **** The ability to ignore more common special C/C++ preprocessor symbols,
1645 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1646 If available, include cdefs.h as an additional source of preprocessor symbols.
1648 **** Improved C/C++ function pointer parsing.
1650 **** In Python, support for converting imports to include file names.
1652 **** Ability to dynamically determine the Python load path.
1654 **** Support for the Python 'WITH' and 'AT' keywords.
1656 **** Improved tooltip completion.
1660 **** The SRecode manual is now included.
1662 **** Tag generation supports constructor/destructor settings and system
1663 include differentiation.
1665 **** Addition of 'Framework' support: Frameworks are specified when a
1666 particular kind of library (such as Android) is needed in a common language
1669 **** Support for nested templates and let variables override based on priority.
1671 **** Support for merging tables from multiple related modes, such as
1672 default -> c++ -> arduino.
1674 ** Compile has a new option `compilation-always-kill'.
1678 *** `custom-reset-button-menu' now defaults to t.
1680 *** Non-option variables are never matched in `customize-apropos' and
1681 `customize-apropos-options' (i.e., the prefix argument does nothing for
1682 these commands now).
1686 *** The variables `term-default-fg-color' and `term-default-bg-color'
1687 are now deprecated in favor of the customizable face `term'.
1689 *** You can customize how to display ANSI terminal colors and styles
1690 by customizing the corresponding `term-color-<COLOR>',
1691 `term-color-underline' and `term-color-bold' faces.
1695 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1697 *** Remote processes are now also supported on remote MS-Windows hosts.
1701 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1702 Previously, this slot stored semicolon-separated attribute-value pairs
1703 appended to some imap URLs, but this is not compatible with RFC 3986.
1704 So now the `filename' slot stores the entire path and query components,
1705 and the `attributes' slot is always nil.
1707 *** New function `url-encode-url' for encoding a URI string.
1708 The `url-retrieve' function now uses this to encode its URL argument,
1709 in case that is not properly encoded.
1711 *** New command `url-cookie-list' displays all the current cookies, and
1712 allows deleting selected cookies.
1714 ** notifications.el supports now version 1.2 of the Notifications API.
1715 The function `notifications-get-capabilities' returns the supported
1718 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1719 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1720 `flymake-warning-bitmap'.
1722 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1723 specifying URL types that should be converted to remote file names at
1724 the FFAP prompt. The default is now '("ftp").
1726 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1727 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1729 ** New option `mouse-avoidance-banish-position' specifies where the
1730 `banish' mouse avoidance setting moves the mouse.
1732 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1733 closing brackets to be aligned with the line of the opening bracket.
1735 ** In Proced mode, new command `proced-renice' renices marked processes.
1737 ** New option `async-shell-command-buffer' specifies the buffer to use
1738 for a new asynchronous `shell-command' when the default output buffer
1739 `*Async Shell Command*' is already in use.
1741 ** SQL mode has a new option `sql-db2-escape-newlines'.
1742 If non-nil, newlines sent to the command interpreter will be escaped
1743 by a backslash. The default does not escape the newlines and assumes
1744 that the sql statement will be terminated by a semicolon.
1746 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1747 (and modes that derive from it), sorts the column at point, or the Nth
1748 column if a numeric prefix argument is given.
1750 ** `which-func-modes' now defaults to t, so Which Function mode, when
1751 enabled, applies to all applicable major modes.
1753 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1756 ** Follow mode no longer works by using advice.
1757 The option `follow-intercept-processes' has been removed.
1759 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1761 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1762 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1763 *** semantic-change-hooks -> semantic-change-functions
1764 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1765 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1766 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1767 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1768 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1769 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1770 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1771 *** rcirc-activity-hooks -> rcirc-activity-functions
1772 *** rcirc-print-hooks -> rcirc-print-functions
1773 *** dbus-event-error-hooks -> dbus-event-error-functions
1774 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1775 *** checkdoc-style-hooks -> checkdoc-style-functions
1776 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1777 *** archive-extract-hooks -> archive-extract-hook
1778 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1779 *** hfy-post-html-hooks -> hfy-post-html-hook
1780 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1781 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1782 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1783 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1785 ** Obsolete packages
1788 In most cases, assoc+member+push+delq work just as well.
1789 And in any case it's just a terrible package: ugly semantics, terrible
1790 inefficiency, and not namespace-clean.
1799 * Incompatible Lisp Changes in Emacs 24.3
1801 ** Docstrings starting with `*' no longer indicate user options.
1802 Only variables defined using `defcustom' are considered user options.
1803 The function `user-variable-p' is now an obsolete alias for
1804 `custom-variable-p'.
1806 ** The return values of `defalias', `defun' and `defmacro' have changed,
1807 and are now undefined. For backwards compatibility, `defun' and
1808 `defmacro' currently return the name of the newly defined
1809 function/macro, but this should not be relied upon.
1811 ** `random' by default now returns a different random sequence in
1812 every Emacs run. Use `(random S)', where S is a string, to set the
1813 random seed to a value based on S, in order to get a repeatable
1814 sequence in later calls.
1816 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1817 that substring is inserted literally even if the LITERAL arg is
1818 non-nil, instead of causing an error to be signaled.
1820 ** `select-window' now always makes the window's buffer current.
1821 It does so even if the window was selected before.
1823 ** The function `x-select-font' can return a font spec, instead of a
1824 font name as a string. Whether it returns a font spec or a font name
1825 depends on the graphical library.
1827 ** `face-spec-set' no longer sets frame-specific attributes when the
1828 third argument is a frame (that usage was obsolete since Emacs 22.2).
1830 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1832 ** The CL package's `get-setf-method' function no longer exists.
1833 Generalized variables are now part of core Emacs Lisp, and implemented
1834 differently to the way cl.el used to do it. It is not possible to
1835 define a compatible replacement for `get-setf-method'. See the file
1836 gv.el for internal details of the new implementation.
1838 ** The arguments of `dbus-register-signal' are no longer just strings,
1839 but keywords or keyword-string pairs. The old argument list will
1840 still be supported for Emacs 24.x.
1842 ** Miscellaneous name changes
1843 Some Lisp symbols have been renamed to correct their spelling,
1844 or to be more consistent with standard Emacs terminology.
1846 *** Renamed functions
1847 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1848 **** inactivate-input-method -> deactivate-input-method
1849 **** quail-inactivate -> quail-deactivate
1850 **** robin-inactivate -> robin-deactivate
1851 **** viper-inactivate-input-method -> viper-deactivate-input-method
1852 **** viper-inactivate-input-method-action ->
1853 viper-deactivate-input-method-action
1854 **** ucs-input-inactivate -> ucs-input-deactivate
1857 The old hooks are still supported for backward compatibility, but they
1858 are deprecated and will be removed eventually.
1859 **** input-method-inactivate-hook -> input-method-deactivate-hook
1860 **** robin-inactivate-hook -> robin-deactivate-hook
1861 **** quail-inactivate-hook -> quail-deactivate-hook
1863 *** Renamed variables
1864 **** follow-deactive-menu -> follow-inactive-menu
1865 **** inactivate-current-input-method-function ->
1866 deactivate-current-input-method-function
1868 ** Some obsolete functions, variables, and faces have been removed:
1869 *** `last-input-char', `last-command-char', `unread-command-char'
1870 *** `facemenu-unlisted-faces'
1871 *** `rmail-decode-mime-charset'
1872 *** `iswitchb-read-buffer'
1873 *** `sc-version', `sc-submit-bug-report'
1874 *** `set-char-table-default'
1875 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1876 *** `compile-internal'
1878 *** `mode-line-inverse-video'
1879 *** `follow-mode-off-hook'
1880 *** `cvs-commit-buffer-require-final-newline'
1881 (use `log-edit-require-final-newline' instead)
1882 *** `cvs-changelog-full-paragraphs'
1883 (use `log-edit-changelog-full-paragraphs' instead)
1884 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1885 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1886 *** `vc-master-templates' (use `vc-handled-backends' instead)
1887 *** `vc-checkout-carefully'
1890 * Lisp Changes in Emacs 24.3
1892 ** CL-style generalized variables are now in core Elisp.
1893 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1894 You can define your own generalized variables using `gv-define-simple-setter',
1895 `gv-define-setter', etc.
1897 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1898 This can significantly speed up execution of non-byte-compiled code,
1899 but can also bump into previously unnoticed cyclic dependencies.
1900 These are generally harmless: they will simply cause the macro calls
1901 to be left for later expansion (as before), but will result in a
1902 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1903 You may wish to restructure your code so this does not happen.
1905 ** New sampling-based Elisp profiler.
1906 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1907 When finished, use M-x profiler-stop. The sampling rate can be based on
1908 CPU time or memory allocations.
1910 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1911 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1913 ** New macros `setq-local' and `defvar-local'.
1915 ** Face underlining can now use a wave.
1917 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1918 of `read-regexp' accepts a string ending with a colon and space, and its
1919 second argument DEFAULTS can be a list of strings accessible via `M-n'
1920 in the minibuffer ahead of other hard-coded useful regexp-related values.
1921 More commands use `read-regexp' now to read their regexp arguments.
1925 *** New function `completion-table-with-quoting' to handle completion
1926 in the presence of quoting, such as file completion in shell buffers.
1928 *** New function `completion-table-subvert' to use an existing completion
1929 table, but with a different prefix.
1933 *** New error type and new function `user-error'.
1934 These do not trigger the debugger.
1936 *** New option `debugger-bury-or-kill', saying what to do with the
1937 debugger buffer when exiting debug.
1939 *** Set `debug-on-message' to enter the debugger when a certain
1940 message is displayed in the echo area. This can be useful when trying
1941 to work out which code is doing something.
1943 *** New var `inhibit-debugger', automatically set to prevent accidental
1944 recursive invocations.
1948 *** New command `fit-frame-to-buffer' adjusts the frame height to
1951 *** The command `fit-window-to-buffer' can adjust the frame height
1952 if the new option `fit-frame-to-buffer' is non-nil.
1954 *** New macro `with-temp-buffer-window', similar to
1955 `with-output-to-temp-buffer'.
1957 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1960 *** New option `switch-to-buffer-preserve-window-point' to restore a
1961 window's point when switching buffers.
1963 *** New display action function `display-buffer-no-window' to not
1964 display the buffer in a window.
1966 *** New display action alist entry `allow-no-window' to indicate the
1967 caller of `display-buffer' is ready to handle the case of not
1968 displaying the buffer in a window.
1970 *** New display action alist entries `window-height' and `window-width'
1971 specify the size of new windows created by `display-buffer'.
1973 *** New display action alist entry `pop-up-frame-parameters', if
1974 non-nil, specifies frame parameters to give any newly-created frame.
1976 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1977 tells display action functions to avoid changing which frame is
1980 *** New display action alist entry `previous-window', if non-nil,
1981 specifies window to reuse in `display-buffer-in-previous-window'.
1983 *** New display action functions `display-buffer-below-selected',
1984 and `display-buffer-in-previous-window'.
1986 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1987 now accept a third argument to avoid choosing the selected window.
1989 *** Additional values recognized for option `window-combination-limit'.
1991 *** The following variables are obsolete, as they can be replaced by
1992 appropriate entries in the `display-buffer-alist' function introduced
1994 **** `dired-shrink-to-fit'
1995 **** `display-buffer-reuse-frames'
1996 **** `display-buffer-function'
1997 **** `special-display-buffer-names'
1998 **** `special-display-frame-alist'
1999 **** `special-display-function'
2000 **** `special-display-regexps'
2004 *** `current-time-string' no longer requires that its argument's year
2005 must be in the range 1000..9999. It now works with any year supported
2006 by the underlying C implementation.
2008 *** `current-time' now returns extended-format time stamps
2009 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2010 PSEC is typically a multiple of 1000 on current machines. Other
2011 functions that use this format, such as `file-attributes' and
2012 `format-time-string', have been changed accordingly. Old-format time
2013 stamps are still accepted.
2015 *** The format of timers in `timer-list' and `timer-idle-list' is now
2016 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2017 The PSECS slot is new, and uses picosecond resolution. It can be
2018 accessed via the new `timer--psecs' accessor.
2020 *** Last-modified time stamps in undo lists now are of the form
2021 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2025 *** Improved security when handling persistent objects:
2027 **** `eieio-persistent-read' now features optional arguments for specifying
2028 the class to load, as well as a flag stating whether subclasses are allowed;
2029 if provided, other classes will be rejected by the reader. For
2030 compatibility with existing code, if the class is omitted only a
2033 **** New specialized reader for pulling in classes and signaling errors
2034 without evaluation of suspicious code.
2036 **** All slots that contain objects must have a :type. Slots with lists
2037 of objects must use a new type predicate for a list of an object type.
2039 *** Support for `find-function' and similar utilities, through the addition
2040 of filename support to generated symbols.
2042 ** Floating point functions now always return special values like NaN,
2043 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2044 Previously, they returned NaNs on some platforms but signaled errors
2045 on others. The affected functions are acos, asin, tan, exp, expt,
2046 log, log10, sqrt, and mod.
2048 ** New fringe bitmap `exclamation-mark'.
2050 ** Miscellaneous changes to special forms and macros
2052 *** `defun' and `defmacro' are now macros rather than special forms.
2054 *** `kbd' is now a function rather than a macro.
2056 ** Miscellaneous new functions
2058 *** `set-temporary-overlay-map' sets up a temporary keymap that
2059 takes precedence over most other maps for a short while (normally one key).
2061 *** `autoloadp' tests if its argument is an autoloaded object.
2063 *** `autoload-do-load' performs the autoloading operation.
2065 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2067 *** `file-name-base' returns a file name sans directory and extension.
2069 *** `function-get' fetches a function property, following aliases.
2071 *** `posnp' tests if an object is a `posn'.
2073 *** `system-users' returns the user names on the system.
2075 *** `system-groups' returns the group names on the system.
2077 *** `tty-top-frame' returns the topmost frame of a text terminal.
2079 ** The following functions and variables are obsolete:
2080 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2081 *** `buffer-has-markers-at'
2082 *** `macro-declaration-function' (use `macro-declarations-alist')
2083 *** `window-system-version' (provides no useful information)
2084 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2085 *** `query-replace-interactive'
2086 *** `font-list-limit' (has had no effect since Emacs < 23)
2089 * Changes in Emacs 24.3 on Non-Free Operating Systems
2091 ** Cygwin builds can use the native MS Windows user interface.
2092 Pass `--with-w32' to configure. The default remains the X11 interface.
2094 ** Two new functions are available in Cygwin builds:
2095 `cygwin-convert-file-name-from-windows' and
2096 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2097 code to access the Cygwin file-name mapping machinery to convert
2098 between Cygwin and Windows-native file and directory names.
2100 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2101 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2102 `mouse-autoselect-window'.
2104 ** On MS Windows Vista and later Emacs now supports symbolic links.
2106 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2107 support for libxml2, even if its presence is detected.
2109 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2111 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2112 directories to the search path. You must add them yourself if you want them.
2115 * Changes in Emacs 24.2
2117 ** This is mainly a bug-fix release.
2120 * Installation Changes in Emacs 24.1
2122 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2123 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2124 also depend on Gtk+. You can disable them with --without-rsvg and
2127 ** Emacs can be compiled with GnuTLS support.
2128 This happens by default if a suitably recent version of the library is
2129 found at build time. To prevent this, use the configure option
2130 `--without-gnutls'. See below for GnuTLS features.
2132 ** Emacs can be compiled with SELinux support.
2133 This happens by default if a suitably recent version of the library is
2134 found at build time. To prevent this, use the configure option
2135 `--without-selinux'. See below for SELinux features.
2137 ** Emacs can be compiled with ImageMagick support.
2138 This happens by default if a suitably recent version of the library is
2139 found at build time. To prevent this, use the configure option
2140 `--without-imagemagick'. See below for ImageMagick features.
2141 This feature is not available for the Nextstep or MS ports.
2143 ** Emacs can be compiled with libxml2 support.
2144 This happens by default if a suitably recent version of the library is
2145 found at build time. To prevent this, use the configure option
2146 `--without-xml2'. See below for libxml2 features.
2148 ** By default, the installed Info and man pages are compressed.
2149 You can disable this by configuring --without-compress-info.
2151 ** New configure option --with-wide-int.
2152 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2153 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2156 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2157 These provide no new functionality, they just remove the need to edit
2158 lib-src/Makefile by hand in order to use the associated features.
2160 ** New configure option --enable-use-lisp-union-type.
2161 This is only useful for Emacs developers to debug certain types of bugs.
2162 This is not a new feature; only the configure flag is new.
2164 ** The standalone programs digest-doc and sorted-doc are removed.
2165 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2167 ** The standalone program `fakemail' is removed.
2168 If you need it, feedmail.el provides a superset of the functionality.
2171 * Startup Changes in Emacs 24.1
2173 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2174 command line arguments, and the EMACS_UNIBYTE environment variable, no
2175 longer have any effect. (They were declared obsolete in Emacs 23.)
2177 ** New command line option `--no-site-lisp' removes site-lisp directories
2178 from load-path. -Q now implies this. This option does not affect the
2179 EMACSLOADPATH environment variable (and hence has no effect for
2183 * Changes in Emacs 24.1
2187 *** Many packages now use the `completion-at-point' command,
2188 rather than implementing separate completion commands.
2190 *** `completion-at-point' now handles tags and semantic completion.
2192 *** Completion in a non-minibuffer now tries to detect the end of completion
2193 and pops down the *Completions* buffer accordingly.
2195 *** New option `completion-cycle-threshold' allows completion cycling.
2197 *** New option `completion-category-overrides' for overriding the
2198 default completion style in certain circumstances.
2200 *** New completion style `substring'.
2202 *** Completion of buffer names uses `substring' completion by default.
2204 *** The option `widget-complete-field' has been removed.
2208 *** The first time you try sending mail, Emacs asks for a mail method.
2209 This is implemented by a new default for `send-mail-function', which
2210 is `sendmail-query-once'. This offers to use the smtpmail package, or
2211 to use the old defaults relying on external mail facilities
2212 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2213 `mailclient-send-it' on Windows).
2215 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2216 transfers the report to your desktop's preferred mail client, if there
2217 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2220 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2221 and Mail mode changes
2223 ** Emacs server and client changes
2225 *** New option `server-port' specifies the port for TCP Emacs servers.
2227 *** New emacsclient argument -q/--quiet suppresses some status messages.
2229 *** New emacsclient argument --frame-parameters specifies the frame
2230 parameters of any newly-created graphical frame.
2232 *** If emacsclient shuts down due to Emacs signaling an error,
2233 its exit status is 1.
2235 *** New emacsclient argument --parent-id ID.
2236 This opens a client frame in parent X window ID, via XEmbed, similar
2237 to the --parent-id argument to Emacs.
2239 ** Internationalization changes
2241 *** Emacs now supports display and editing of bidirectional text.
2242 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2243 displayed in the correct visual order as expected by users of those
2244 scripts. The display reordering is a "full bidirectionality" class
2245 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2246 with no RTL text should look exactly the same as before.
2248 **** New buffer-local variable `bidi-display-reordering'.
2249 To disable display reordering in a buffer, change this to nil.
2251 **** New buffer-local variable `bidi-paragraph-direction'.
2252 If nil (the default), Emacs determines the base direction of each
2253 paragraph from its text, as specified by the UBA. Setting the value
2254 to `right-to-left' or `left-to-right' forces a base direction on each
2257 Paragraphs with right-to-left base direction are displayed starting at
2258 the right window edge.
2260 *** Enhanced support for characters with no glyphs in available fonts,
2261 or, on text terminals, characters that cannot be encoded by the
2262 terminal coding system. The new option `glyphless-char-display-control'
2263 specifies how to display them: as a hexadecimal code in a box, a thin
2264 1-pixel space, an empty box, etc.
2266 *** New input methods for Farsi and Bulgarian
2267 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2269 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2270 (U+2010 and U+2011).
2272 *** New Hebrew translation of the Emacs Tutorial.
2273 Type `C-u C-h t' to choose it in case your language setup doesn't
2274 automatically select it.
2276 ** An Emacs Lisp package manager is now included.
2277 This is a convenient way to download and install additional packages,
2278 from a package repository at http://elpa.gnu.org.
2280 *** M-x list-packages shows a list of packages, which can be
2281 selected for installation.
2283 *** New command `describe-package', bound to `C-h P'.
2285 *** By default, all installed packages are loaded automatically when
2286 Emacs starts up. To disable this, set `package-enable-at-startup' to
2287 nil. To specify the packages to load, customize `package-load-list'.
2289 ** Custom theme changes
2291 *** New command `M-x customize-themes', which provides a convenient
2292 interface for enabling and disabling Custom themes.
2294 *** New option `custom-theme-load-path' is the load path for themes.
2295 Emacs no longer looks for Custom themes in `load-path'. The default
2296 value of `custom-theme-load-path' says to look for themes in
2297 `custom-theme-directory', followed by a subdirectory of
2298 `data-directory' named "themes/", which contains a small selection of
2299 built-in Custom themes.
2301 *** New option `custom-safe-themes' records known-safe theme files.
2302 If a theme is not in this list, Emacs queries before loading it, and
2303 offers to save the theme to `custom-safe-themes' automatically. By
2304 default, all themes included in Emacs are treated as safe.
2306 ** Improved GTK integration
2308 *** GTK scroll-bars are now placed on the right by default.
2309 The function `set-scroll-bar-mode' can change this.
2311 *** GTK tool bars can have just text, just images or images and text.
2312 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2313 the default is taken from desktop settings.
2315 *** GTK tool bars can be placed on any edge of the frame.
2316 The frame-parameter tool-bar-position controls this. It takes the
2317 values top, left, right or bottom. The Options => Show/Hide menu has
2320 *** The default colors for selected text (the `region' face) are taken
2321 from the GTK theme when Emacs is built with GTK.
2323 *** Emacs uses GTK tooltips by default if built with GTK.
2324 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2326 ** Graphical interface changes
2328 *** On graphical displays, the mode-line no longer ends in dashes.
2329 Also, the first dash (which does not indicate anything) is just
2330 displayed as a space.
2332 *** `menu-bar-select-buffer-function' lets you choose another operation
2333 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2335 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2336 built with Xft. These fonts can be set via X resources, for example:
2337 Emacs.pane.menubar.font: Courier-12
2341 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2342 or if it receives a SIGINT signal in batch mode.
2344 *** `kill-emacs-hook' is now also run in batch mode.
2345 Third-party code which adds to `kill-emacs-hook' should check if they
2346 do the right thing in batch mode.
2348 ** Scrolling changes
2350 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2351 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2352 of buffer at first key-press (instead they move to top/bottom of buffer)
2353 when `scroll-error-top-bottom' is non-nil.
2355 *** New option `scroll-error-top-bottom' (see above).
2357 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2358 scroll a line instead of full screen.
2360 *** New property `scroll-command' should be set on a command's symbol to
2361 define it as a scroll command affected by `scroll-preserve-screen-position'.
2363 *** If you customize `scroll-conservatively' to a value greater than 100,
2364 Emacs will never recenter point in the window when it scrolls due to
2365 cursor motion commands or commands that move point (e.f., `M-g M-g').
2366 Previously, you needed to use `most-positive-fixnum' as the value of
2367 `scroll-conservatively' to achieve the same effect.
2369 *** "Aggressive" scrolling now honors the scroll margins.
2370 If you customize `scroll-up-aggressively' or
2371 `scroll-down-aggressively' and move point off the window, Emacs now
2372 scrolls the window so as to avoid positioning point inside the scroll
2375 ** Basic SELinux support has been added.
2376 This requires Emacs to be linked with libselinux at build time.
2378 *** Emacs preserves the SELinux file context when backing up.
2379 Also, the function `copy-file' has an extra optional argument for
2380 preserving SELinux context, and the return value of `backup-buffer'
2381 now includes the SELinux context.
2383 *** New functions `file-selinux-context' and `set-file-selinux-context'
2384 get and set the SELinux context of a file.
2388 *** `delete-by-moving-to-trash' now only affects commands that specify
2389 trashing. This avoids inadvertently trashing temporary files.
2391 *** Calling `delete-file' or `delete-directory' with a prefix argument
2392 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2394 ** File- and directory-local variable changes
2396 *** You can stop directory local vars from applying to subdirectories.
2397 Add an element (subdirs . nil) to the alist portion of any variables
2398 settings to indicate that the section should not apply to
2401 *** Directory local variables can apply to some file-less buffers.
2402 Affected modes include dired, vc-dir, and log-edit. For example,
2403 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2404 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2405 `hack-dir-local-variables-non-file-buffer' to support this.
2407 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2408 Instead, use "eval: (minor-mode 1)".
2410 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2411 to `inhibit-local-variables-regexps'. As the name suggests, it now
2412 applies to ALL file local variables, not just -*- lines. The
2413 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2418 *** The `quit-window' command now restores the last buffer displayed
2419 in the quitted window.
2421 *** Resizing an Emacs frame now preserves proportional window sizes,
2422 modulo restrictions like window minimum sizes and fixed-size windows.
2424 *** The behavior of `display-buffer' is now customizable in detail.
2426 **** New option `display-buffer-base-action' specifies a list of
2427 user-determined display "actions" (functions and optional arguments
2428 for choosing the displaying window).
2430 This takes precedence over the default display action, which is
2431 specified by `display-buffer-fallback-action'.
2433 **** New option `display-buffer-alist' maps buffer name regexps to
2434 display actions, taking precedence over `display-buffer-base-action'.
2436 *** New option `window-combination-limit'.
2437 The new option `window-combination-limit' allows to return the space
2438 obtained for resizing or creating a window more reliably to the window
2439 from which such space was obtained.
2441 *** New option `window-combination-resize'.
2442 The new option `window-combination-resize' allows to split a window that
2443 otherwise cannot be split because it's too small by stealing space from
2444 other windows in the same combination. Subsequent resizing or deletion
2445 of the window will resize all windows in the same combination as well.
2447 *** New option `frame-auto-hide-function' lets you choose between
2448 iconifying or deleting a frame when burying a buffer in a dedicated
2449 frame, or quitting a window showing a buffer in a frame of its own.
2451 *** New commands `maximize-window' and `minimize-window'.
2452 These maximize and minimize the size of a window within its frame.
2454 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2455 These functions allow to navigate through the live buffers that have
2456 been shown in a specific window.
2458 ** Minibuffer changes
2460 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2461 This is handy for minibuffer-only frames, and is also used for the feature
2462 where mouse-1 pops up *Messages*"', which can now easily be changed.
2464 *** Minibuffers set `truncate-lines' to nil.
2465 If you want to change the value to something else, you could use
2466 for example `minibuffer-setup-hook'.
2468 ** `auto-mode-case-fold' is now enabled by default.
2470 ** `backup-by-copying-when-mismatch' now defaults to t.
2472 ** New basic faces `error', `warning', `success'.
2473 These are used to highlight text indicating failure, caution or
2474 successful operation.
2476 ** New option `list-colors-sort' defines the color sort order
2477 for `list-colors-display'.
2479 ** The variable `focus-follows-mouse' now always defaults to nil.
2482 * Editing Changes in Emacs 24.1
2486 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2487 `isearch-yank-line'.
2489 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2490 `isearch-yank-kill'.
2492 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2494 ** New commands `count-words-region' and `count-words'.
2496 *** M-= is bound to `count-words-region', not `count-lines-region'.
2497 The `count-words-region' command, when called interactively, reports
2498 the number of lines, words, and characters in the region. It is a
2499 superset of the old `count-lines-region', which is now an obsolete
2502 ** The command `just-one-space' (M-SPC), if given a negative argument,
2503 also deletes newlines around point.
2507 *** New option `delete-active-region'.
2508 If non-nil, [delete] and DEL delete the region if it is active and no
2509 prefix argument is given. If set to `kill', those commands kill
2512 *** New command `delete-forward-char', bound to [delete].
2513 This is meant for interactive use, and obeys `delete-active-region'.
2514 The command `delete-char' does not obey `delete-active-region'.
2516 *** `delete-backward-char' is now a Lisp function.
2517 Apart from obeying `delete-active-region', its behavior is unchanged.
2518 However, the byte compiler now warns if it is called from Lisp; Lisp
2519 callers should use delete-char with a negative argument instead.
2521 *** The option `mouse-region-delete-keys' has been deleted.
2523 ** Selection changes.
2525 The default handling of clipboard and primary selections has been
2526 changed to conform with modern X applications. In short, most
2527 commands for killing and yanking text now use the clipboard, while
2528 mouse commands use the primary selection.
2530 In the following, we provide a list of these changes, followed by a
2531 list of steps to get the old behavior back if you prefer that.
2533 *** `select-active-regions' now defaults to t.
2534 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2535 the kill ring. The selected text is put in the primary selection, if
2536 the system possesses a separate primary selection facility (e.g. X).
2538 **** `select-active-regions' also accepts a new value, `only'.
2539 This means to only set the primary selection for temporarily active
2540 regions (usually made by mouse-dragging or shift-selection);
2541 "ordinary" active regions, such as those made with C-SPC followed by
2542 point motion, do not alter the primary selection.
2544 **** `mouse-drag-copy-region' now defaults to nil.
2546 *** mouse-2 is now bound to `mouse-yank-primary'.
2547 This pastes from the primary selection, ignoring the kill-ring.
2548 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2550 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2552 *** `x-select-enable-primary' now defaults to nil.
2553 Thus, commands that kill text or copy it to the kill-ring (such as
2554 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2556 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2557 exactly equivalent to M-w, C-w, and C-y respectively.
2559 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2560 non-nil by default, as Windows does not support the primary selection
2561 between applications.
2563 *** To return to the previous behavior, do the following:
2565 **** Change `select-active-regions' to nil.
2566 **** Change `mouse-drag-copy-region' to t.
2567 **** Change `x-select-enable-primary' to t (on X only).
2568 **** Change `x-select-enable-clipboard' to nil.
2569 **** Bind `mouse-yank-at-click' to mouse-2.
2571 *** Support for X cut buffers has been removed.
2573 *** X clipboard managers are now supported.
2574 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2576 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2577 in the current rectangle. With a prefix argument, this prompts for a
2578 number to count from and for a format string.
2580 ** `redisplay-dont-pause' now defaults to t.
2581 This makes Emacs feel more responsive to editing commands that arrive
2582 at high rate, e.g. if you lean on some key, because stopping redisplay
2583 in the middle (when this variable is nil) forces more expensive
2584 updates later on, and Emacs appears to be unable to keep up.
2586 ** The behavior of <TAB> for active regions in Text mode has changed.
2587 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2588 when the region is active causes Emacs to indent all the lines in the
2589 region, aligning them with the line previous to the first line in the
2590 region (or with the left margin if there is no previous line).
2592 ** When `occur' is called with a prefix argument, matching strings are
2593 collected into the `*Occur*' buffer without line numbers. If there
2594 are parenthesized subexpressions in the specified regexp, `occur'
2595 reads replacement text that may contain \\& and \\N whose convention
2596 follows `replace-match'.
2599 * Changes in Specialized Modes and Packages in Emacs 24.1
2601 ** Archive Mode has basic support for browsing and updating 7z archives.
2605 *** BibTeX mode now supports biblatex.
2606 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2607 `bibtex-entry-field-alist' is now an obsolete alias for
2608 `bibtex-BibTeX-entry-alist'.
2610 *** New command `bibtex-search-entries', bound to C-c C-a.
2612 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2614 *** New variable `bibtex-search-entry-globally'.
2618 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2620 *** The default browser used by the package is now the "xdg-open" program,
2621 on platforms that support it. This calls your desktop's preferred browser.
2625 *** Support for musical notes.
2627 *** Support for logarithmic units.
2629 *** No longer uses the tex prefix for TeX specific unit names when
2630 using TeX or LaTeX mode.
2632 *** New option to highlight selections using faces.
2634 *** `calc-histogram' has the option of using a vector to determine the bins.
2636 *** New "O" option prefix.
2638 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2640 ** Calendar, Diary, and Appt
2642 *** Diary entries can contain non-printing "comments".
2643 See the variable `diary-comment-start'.
2645 *** Appointments can specify their individual warning times.
2646 See the variable `appt-warning-time-regexp'.
2648 *** The function specified by `appt-disp-window-function' may be passed
2649 lists of arguments if multiple appointments are due at similar times.
2650 If you are using a custom function for this, you should update it.
2652 *** New function `diary-hebrew-birthday'.
2654 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2655 may no longer be nil, but must all be strings.
2657 *** The obsolete (since Emacs 22.1) method of enabling the appt
2658 package by adding `appt-make-list' to `diary-hook' has been removed.
2659 Use `appt-activate' instead.
2661 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2662 appt-issue-message (use the function appt-activate)
2663 appt-visible/appt-msg-window (use the variable appt-display-format)
2665 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2666 view-diary-entries, list-diary-entries, show-all-diary-entries
2670 *** New feature to "guess" the style in an existing buffer.
2671 The main entry point is M-x c-guess.
2673 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2675 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2676 Thus C-M-a will, by default, go to the beginning of the immediate function,
2679 *** "Macros with semicolons" can be registered for correct indentation.
2680 Where such a macro ends a line (no semicolon) the next statement is no longer
2681 parsed as a statement continuation.
2683 ** Comint and modes derived from it use the standard completion code.
2687 *** Compilation mode can be used without Font Lock mode.
2688 `compilation-parse-errors-function' is now obsolete.
2690 *** New variable `compilation-filter-start', which is bound while
2691 `compilation-filter-hook' runs. It records the start position of the
2692 text inserted by `compilation-filter'.
2694 *** `compilation-error-screen-columns' and `compilation-first-column'
2695 are obeyed in the editing buffer. So programming language modes can
2696 set them, whereas previously only the value in the *Compilation*
2701 *** Customize buffers now contain a search field.
2702 The search is performed using `customize-apropos'.
2703 To turn off the search field, set `custom-search-field' to nil.
2705 *** Options in customize group buffers start out hidden if not customized.
2706 Use the arrow to the left of the option name to toggle visibility.
2708 *** custom-buffer-sort-alphabetically now defaults to t.
2710 *** The color widget now has a "Choose" button, which allows you to
2711 choose a color via `list-colors-display'.
2715 *** It is now possible to access buses other than the default system
2718 *** The `dbus-register-method' and `dbus-register-property' functions
2719 optionally do not register names.
2721 *** The new function `dbus-register-service' registers a known service
2722 name on a D-Bus without also registering a property or a method.
2726 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2727 if called with a prefix argument, read a file name from the minibuffer
2728 instead of using the current buffer.
2730 *** The "dired local variables" feature of Dired-x is obsolete.
2731 The standard directory local variables feature replaces it.
2735 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2736 controlling attempts to autojoin a channel.
2738 *** New variable `erc-coding-system-precedence': If we use `undecided'
2739 as the server coding system, this variable will then be consulted.
2740 The default is to decode strings that can be decoded as utf-8 as
2741 utf-8, and do the normal `undecided' decoding for the rest.
2745 *** The default value of `eshell-directory-name' has changed
2746 to be an "eshell" directory in `user-emacs-directory'.
2747 The old "~/.eshell/" directory is still used if it exists, though.
2751 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2752 It now supports multithread non-stop debugging and simultaneous
2753 debugging of several threads.
2757 *** RET (`image-toggle-animation') toggles animation, if applicable.
2758 Animation plays once, unless the option `image-animate-loop' is non-nil.
2762 *** New command M-x info-display-manual displays a named Info manual.
2763 If that manual is already visited in some Info buffer, it displays
2764 that buffer. (This is handy if you have many manuals in many *info*
2765 buffers, and don't remember the name of the buffer visiting the manual
2766 you want to consult.) Otherwise, it loads and displays the manual.
2768 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2769 This is for compatibility with the stand-alone Info reader program,
2770 and also because `Info-edit' is a rarely used command that is disabled
2773 ** Mail mode changes (not Message mode)
2775 *** New command M-x mail-add-attachment for adding MIME attachments
2777 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2778 (Its name is misleading, since it has nothing to do with MIME
2779 attachments.) The old name is now an obsolete alias to the new name.
2781 ** MH-E has been updated to MH-E version 8.3.1.
2782 See MH-E-NEWS for details.
2784 ** Modula-2 mode provides auto-indentation.
2786 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2788 ** nXML mode no longer binds C-RET to `nxml-complete'.
2789 Completion is now performed via `completion-at-point', bound to C-M-i
2790 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2791 default), this performs tag completion.
2793 ** Org mode has been updated to version 7.8.09.
2794 See ORG-NEWS for details.
2796 ** Prolog mode has been completely revamped, with lots of additional
2797 functionality such as more intelligent indentation, electricity,
2798 support for more variants, including Mercury, and a lot more.
2802 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2803 in the Rmail incoming message.
2805 *** The variable `rmail-message-filter' no longer has any effect.
2806 This change was made in Emacs 23.1 but was not advertised at the time.
2807 Try using `rmail-show-message-hook' instead.
2811 *** M-x shell prompts for the shell path name if the default directory
2812 is a remote file name and neither the environment variable $ESHELL nor
2813 the variable `explicit-shell-file-name' is set.
2815 *** TAB is now bound to the standard `completion-at-point' command,
2816 which now implements the pcomplete rules for shell command completion.
2820 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2821 if the mail server supports them. This uses either built-in GnuTLS
2822 support, or the starttls.el library. Customize `smtpmail-stream-type'
2825 *** The variable `smtpmail-auth-credentials' has been removed.
2826 By default, the information is now stored in the file ~/.authinfo.
2827 This was the default value of smtpmail-auth-credentials. If you had
2828 customized smtpmail-auth-credentials to a list of user names and
2829 passwords, those settings are not used. During your first connection
2830 to the smtp server, Emacs will prompt for the user name and password,
2831 and offer to save them to ~/.authinfo. Or you can manually copy the
2832 credentials to ~/.authinfo. For example, if you had
2834 (setq smtpmail-auth-credentials
2835 '(("mail.example.org" 25 "jim" "s!cret")))
2837 then the equivalent line in ~/.authinfo would be
2839 machine mail.example.org port 25 login jim password s!cret
2841 See the auth-source manual for more information, e.g. on encrypting
2842 the credentials file.
2844 *** The variable `smtpmail-starttls-credentials' has been removed.
2845 If you had that set, you need to put
2847 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2849 in your ~/.authinfo file instead.
2851 *** SMTPmail defaults to using the address in the From: header as the
2852 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2853 to the address you wish to use instead.
2857 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2858 and `sql-oracle-scan-on'.
2860 *** New options controlling prompting for login parameters.
2861 Each supported product has a custom variable `sql-*-login-params',
2862 which is a list of the parameters to be prompted for before a
2863 connection is established.
2865 *** The command `sql-product-interactive' now takes a prefix argument,
2866 which causes it to prompt for an SQL product.
2868 *** Product-specific SQL interactive commands now take prefix arguments.
2869 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2870 given a prefix argument, prompt for a name for the SQL interactive
2871 buffer. This reduces the need for calling `sql-rename-buffer'.
2873 *** SQL interactive modes suppress command continuation prompts, and
2874 replace tabs with spaces. The first change impacts multiple line SQL
2875 statements entered with C-j between each line, statements yanked into
2876 the buffer and statements sent with `sql-send-*' functions. The
2877 second prevents the MySQL and Postgres interpreters from listing
2878 object name completions when sent text via `sql-send-*' functions.
2880 *** New command `sql-connect' starts a predefined SQLi session,
2881 using the login parameters from `sql-connection-alist'.
2883 *** New "Save Connection" menu item in SQLi buffers.
2884 This gathers the login params specified for the SQLi session, if it
2885 was not started by a connection, and saves them as a new connection.
2887 *** New commands for listing database objects and details:
2888 sql-list-all and sql-list-table.
2890 *** An API for manipulating SQL product definitions has been added.
2894 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2898 *** New inline access method "ksu" (kerberized su).
2900 *** The following access methods are discontinued: "ssh1_old",
2901 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2903 *** The user option `remote-file-name-inhibit-cache' controls whether
2904 remote file attributes are cached for better performance.
2906 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2907 default value to "".
2909 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2910 for remote machines which support SELinux.
2912 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2913 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2914 the degree of parallelism.
2916 ** VC and related modes
2918 *** Support for pulling on distributed version control systems.
2919 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2920 supported (currently with Bzr, Git, and Mercurial), to update the
2921 current branch and working tree. A prefix argument means to prompt
2922 the user for specifics, e.g. a pull location.
2924 *** `vc-update' is now an alias for `vc-pull'.
2926 *** Support for merging on distributed version control systems.
2927 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2928 is supported (currently with Bzr, Git, and Mercurial), to merge
2929 changes from another branch into the current one. It prompts for
2930 specifics, e.g. a merge source.
2932 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2933 shows a diff while querying the user. It defaults to t.
2935 *** Log entries in some Log View buffers can be toggled to display a
2936 longer description by typing RET (log-view-toggle-entry-display).
2937 This is currently supported for Bzr, Git, and Mercurial (to support
2938 another backend, define a `log-view-expanded-log-entry-function').
2939 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2940 use this to display the full log entry for the revision at point.
2942 *** New command `vc-ediff' allows visual comparison of two revisions
2943 of a file similar to `vc-diff', but using ediff backend.
2945 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2946 this was not advertised at the time.
2948 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2949 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2950 this was not advertised at the time.
2956 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2958 *** partial-completion-mode (complete.el) is obsolete.
2959 You can get a comparable behavior with:
2960 (setq completion-styles '(partial-completion initials))
2961 (setq completion-pcm-complete-word-inserts-delimiters t)
2963 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2965 *** pgg is obsolete (use EasyPG instead).
2967 *** sregex.el is obsolete, since rx.el is a strict superset.
2969 *** s-region.el and pc-select.el are obsolete.
2970 They are superseded by shift-select-mode, enabled by default since 23.1.
2972 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2976 *** The Landmark game is now invoked with `landmark', not `lm'.
2977 Its functions and variables have been similarly renamed.
2979 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2980 (This interfered with cua-mode.)
2982 *** f90.el has some support for Fortran 2008 syntax.
2984 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2986 *** New command `nato-region' converts text to NATO phonetic alphabet.
2989 * New Modes and Packages in Emacs 24.1
2991 ** Occur Edit mode applies edits made in *Occur* buffers to the
2992 original buffers. It is bound to "e" in Occur mode.
2994 ** New global minor mode electric-pair-mode.
2995 When enabled, typing an open parenthesis automatically inserts the
2996 matching closing one.
2998 ** New global minor mode electric-indent-mode.
2999 When enabled, typing certain characters triggers reindentation.
3000 Major modes wishing to use this can set electric-indent-chars or
3001 electric-indent-functions.
3003 ** New global minor mode electric-layout-mode.
3004 When enabled, typing certain characters automatically inserts newlines.
3005 Major modes wishing to use this can set electric-layout-rules.
3007 ** tabulated-list.el provides a generic major mode for tabulated data,
3008 from which other modes can be derived.
3010 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3012 ** secrets.el is an implementation of the Secret Service API, an
3013 interface to password managers like GNOME Keyring or KDE Wallet. The
3014 Secret Service API requires D-Bus for communication. The command
3015 `secrets-show-secrets' offers a buffer with a visualization of the
3018 ** notifications.el provides an implementation of the Desktop
3019 Notifications API. It requires D-Bus for communication.
3021 ** soap-client.el supports access to SOAP web services from Emacs.
3022 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3024 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3026 ** New emacs-lock.el package.
3027 The previous version has been moved to obsolete/old-emacs-lock.el.
3028 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3029 against exiting Emacs and killing the buffer can be set separately.
3030 The mechanism for automatically turning off protection for buffers
3031 with dead inferior processes has been generalized.
3034 * Incompatible Lisp Changes in Emacs 24.1
3036 ** Passing a nil argument to a minor mode function call now ENABLES
3037 the minor mode unconditionally. This is so that you can write e.g.
3039 (add-hook 'text-mode-hook 'foo-mode)
3041 to enable foo-mode in Text mode buffers, removing the need for
3042 `turn-on-foo-mode' style functions. This affects all mode commands
3043 defined by `define-minor-mode'. If called interactively, the mode
3044 command still toggles the minor mode.
3046 ** The return value of `backup-buffer' has changed.
3047 It is now a list of three elements, where the second element is a list
3048 describing the original file's SELinux context. If Emacs or the
3049 system lacks SELinux support, the context list is (nil nil nil nil).
3050 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3052 ** `char-direction-table' and the `char-direction' function were deleted.
3053 They were buggy and inferior to the new support of bidirectional
3054 editing introduced in Emacs 24. If you need the bidirectional
3055 properties of a character, use `get-char-code-property' with the last
3056 argument `bidi-class'.
3058 ** `copy-directory' now copies the source directory as a subdirectory
3059 of the target directory, if the latter is an existing directory. The
3060 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3061 the contents directly into a pre-existing target directory.
3063 ** For mouse click input events in the text area, the Y pixel
3064 coordinate in the POSITION list now counts from the top of the text
3065 area, excluding any header line. Previously, it counted from the top
3068 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3069 been further reduced. Now a backquote not followed by a space is
3070 always treated as a "new-style" backquote. Please remove all
3071 "old-style" backquotes from your code. If your code uses backquotes
3072 as documented in the Elisp manual, and compiles without warning, then
3073 you have nothing to do in this regard. Code not following the
3074 appropriate conventions may fail to compile.
3076 The most common cause of trouble seems to be an old-style backquote
3077 followed by a newline. Another cause of trouble is vector notation
3078 for key sequence notation: instead of [(control ,)] and [(control ')],
3079 you should write [(control ?,)] and [(control ?')], which will work in
3082 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3083 was not advertised at the time. The function `custom-initialize-delay'
3084 replaced all known uses.
3086 ** `view-buffer' now treats special mode-class in the same way that
3087 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3088 major mode is special).
3090 ** Menu and tool bar changes
3092 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3093 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3094 With these alist entries omitted, `make-frame' checks the value of the
3095 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3096 a menu-bar or tool-bar, respectively. If the alist entries are added,
3097 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3099 *** The menu bar bindings's caches are not used any more.
3100 Use (where-is-internal <def> nil t) instead.
3102 ** Regions created by mouse dragging are now normal active regions,
3103 similar to those created by shift-selection (see Selection changes
3104 above). In previous Emacs versions, these regions were delineated by
3105 `mouse-drag-overlay'; that variable has been removed.
3107 ** The fourth argument of `filter-buffer-substring' has been removed.
3108 If you want to remove text properties from the final result, simply
3109 pass the result through substring-no-properties.
3111 ** cl.el no longer provides `cl-19'.
3113 ** The following obsolete functions and aliases have been removed
3114 (the appropriate new function is given in parentheses; "not needed"
3115 means you can just remove all calls to the function in question):
3117 *** `comint-kill-output' (`comint-delete-output')
3118 *** `decompose-composite-char' (`char-to-string')
3119 *** `outline-visible' (`outline-invisible-p')
3120 *** `internal-find-face' (`facep')
3121 *** `internal-get-face' (`facep and check-face')
3122 *** `frame-update-faces' (not needed)
3123 *** `frame-update-face-colors' (`frame-set-background-mode')
3124 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3125 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3126 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3127 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3128 *** `x-make-font-unbold' (`make-face-unbold')
3129 *** `x-make-font-unitalic' (`make-face-unitalic')
3130 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3131 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3132 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3133 *** `char-bytes' (== 1)
3134 *** `isearch-return-char' (`isearch-printing-char')
3135 *** `make-local-hook' (not needed)
3136 *** `set-screen-height' (`set-frame-height')
3137 *** `set-screen-width' (`set-frame-width')
3139 ** The following obsolete variables and varaliases have been removed
3140 (the appropriate new variable is given in parentheses):
3142 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3143 *** `vc-header-alist' (`vc-BACKEND-header')
3144 *** `directory-sep-char' (== ?/)
3145 *** `font-lock-defaults-alist' (`font-lock-defaults')
3146 *** `e' (`float-e').
3148 ** The following obsolete files were removed:
3149 sc.el, x-menu.el, rnews.el, rnewspost.el
3151 ** The format of the finder-inf.el file has changed, since the Finder
3152 mechanism is now based on the package system. The variable
3153 `finder-package-info' is replaced by `package--builtins' and
3154 `finder-keywords-hash'.
3156 ** When generating autoloads, `update-directory-autoloads' no longer
3157 assumes every inspected file is in your `load-path'. It instead
3158 generates relative names according to the current `load-path'.
3161 * Lisp Changes in Emacs 24.1
3163 ** Code can now use lexical scoping by default instead of dynamic scoping.
3164 The `lexical-binding' variable enables lexical scoping for local
3165 variables. It is typically set via a file-local variable in the first
3166 line of the file, in which case it applies to all the code in that
3169 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3170 binding instead of the old dynamic binding mode.
3172 *** Lexically scoped interpreted functions are represented with a new form
3173 of function value which looks like (closure ENV ARGS &rest BODY).
3175 *** New macro `letrec' to define recursive local functions.
3177 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3178 So do `defcustom' and other forms that call `defvar' as a subroutine.
3180 *** New function `special-variable-p' to check whether a variable is
3181 declared as dynamically bound.
3183 *** The form ((lambda ...) ...) is deprecated.
3185 ** An Emacs Lisp testing tool is now included.
3186 Emacs Lisp developers can use this tool to write automated tests for
3187 their code. See the ERT info manual for details.
3189 ** Changes for bidirectional display and editing
3191 *** New function `current-bidi-paragraph-direction'.
3192 This returns the base direction of the paragraph at point.
3194 *** New function `bidi-string-mark-left-to-right'.
3195 Given a string containing characters from right-to-left scripts, this
3196 function returns another string which can be safely inserted into a
3197 buffer, such that any following text will be always displayed to the
3198 right of that string. (This works by appending an invisible Unicode
3199 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3201 This is useful when the buffer has overall left-to-right paragraph
3202 direction and you need to insert a string whose contents are not known
3203 in advance, without disrupting the layout of the line.
3207 *** Window tree functions are accessible in Elisp.
3208 Functions are provided to return the parent, siblings or child windows
3209 of any window including internal windows (windows not associated with a
3210 buffer) in the window tree.
3212 **** New function `window-valid-p' gives non-nil for live and internal
3215 **** Window manipulation can deal with internal windows.
3216 Many window handling functions like `split-window', `delete-window', or
3217 `delete-other-windows' as well as the window resizing functions can now
3218 act on any window including internal ones.
3220 *** window-total-height/-width vs window-body-height/-width.
3221 The function `window-height' has been renamed to `window-total-height'
3222 and `window-width' has been renamed to `window-body-width'. The old
3223 names are provided as aliases. Two new functions `window-total-width'
3224 and `window-body-height' are provided.
3226 *** Window parameters specific to window handling functions.
3227 For each window you can specify a parameter to override the default
3228 behavior of a number of functions like `split-window', `delete-window'
3229 and `delete-other-windows'. The variable `ignore-window-parameters'
3230 allows to ignore processing such parameters.
3232 *** New semantics of third argument of `split-window'.
3233 The third argument of `split-window' has been renamed to SIDE and can be
3234 set to any of the values 'below, 'right, 'above, or 'left to make the
3235 new window appear on the corresponding side of the window that shall be
3236 split. Any other value of SIDE will cause `split-window' to split the
3237 window into two side-by-side windows as before.
3239 *** Window resizing functions.
3240 A new standard function for resizing windows called `window-resize' has
3241 been introduced. This and all other functions for resizing windows no
3242 longer delete any windows when they become too small.
3244 *** Deleting the selected window now selects the most recently selected
3245 live window on that frame instead.
3247 *** `adjust-window-trailing-edge' adjustments.
3248 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3249 is able to resize other windows if a window adjacent to the trailing
3250 edge cannot be shrunk any more. This makes its behavior more similar to
3251 that of Emacs 21 without compromising, however, its inability to delete
3252 windows which was introduced in Emacs 22.
3254 *** Window-local buffer lists.
3255 Windows now have local buffer lists. This means that removing a buffer
3256 from display in a window will preferably show the buffer previously
3257 shown in that window with its previous window-start and window-point
3258 positions. This also means that the same buffer may be automatically
3259 shown twice even if it already appears in another window.
3261 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3262 which if non-nil requires the buffer to be displayed in the currently
3263 selected window, signaling an error otherwise. If nil, another window
3264 can be used, e.g. if the selected one is strongly dedicated.
3266 *** `split-window-vertically' and `split-window-horizontally' renamed
3267 to `split-window-below' and `split-window-right' respectively.
3268 The old names are kept as aliases.
3272 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3273 named ACTION, and takes a display action of the same form as
3274 `display-buffer-base-action' (see Changes, above). A non-nil,
3275 non-list value is treated specially, as the old meaning.
3277 **** New variable `display-buffer-overriding-action'.
3279 **** The procedure of `display-buffer' etc. to choose a window is
3280 determined by combining `display-buffer-overriding-action',
3281 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3282 and `display-buffer-fallback-action'. The second and fourth of these
3283 are user-customizable variables.
3285 See the docstring of `display-buffer' for details.
3287 *** New functions `window-state-get' and `window-state-put'.
3288 These functions allow to save and restore the state of an arbitrary
3289 frame or window as an Elisp object.
3293 *** New variable `completion-extra-properties' used to specify extra
3294 properties of the current completion:
3295 - :annotate-function, same as the old completion-annotate-function.
3296 - :exit-function, function to call after completion took place.
3298 *** Functions on `completion-at-point-functions' can return any of the
3299 properties valid for `completion-extra-properties'.
3301 *** `completion-annotate-function' is obsolete.
3303 *** New `metadata' method for completion tables. The metadata thus returned
3304 can specify various details of the data returned by `all-completions':
3305 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3306 used to select a style in completion-category-overrides.
3307 - `annotation-function' to add annotations in *Completions*.
3308 - `display-sort-function' to specify how to sort entries in *Completions*.
3309 - `cycle-sort-function' to specify how to sort entries when cycling.
3311 *** `minibuffer-local-filename-must-match-map' is not used any more.
3312 Instead, the bindings in `minibuffer-local-filename-completion-map'
3313 are combined with `minibuffer-local-must-match-map'.
3315 *** New variable `completing-read-function' allows overriding the
3316 behavior of `completing-read'.
3318 ** `glyphless-char-display' can now distinguish between graphical and
3319 text terminal display, via a char-table entry that is a cons cell.
3321 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3322 Instead, the offending function is removed.
3326 *** New function `run-hook-wrapped' for running an abnormal hook by
3327 passing the hook functions as arguments to a "wrapping" function.
3328 Like `run-hook-with-args-until-success', it stops at the first
3329 non-nil return value.
3331 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3332 set of "wrapping" filters, similar to around advice.
3333 (A version of this macro was actually added in Emacs 23.2 but was not
3334 advertised at the time.)
3338 *** New macro `condition-case-unless-debug' (this was actually added in
3339 Emacs 23.1 as condition-case-no-debug, but not advertised)
3341 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3343 *** Variable `stack-trace-on-error' removed.
3345 *** The debugger can now "continue" from an error, which means it will
3346 jump to the error handler as if the debugger had not been invoked
3347 instead of jumping all the way to the top-level.
3349 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3350 This can be useful when `inhibit-quit' is set.
3352 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3353 named Emacs server instances.
3355 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3356 to redirect STDOUT to a file.
3358 ** The function `format-time-string' now supports the %N directive,
3359 for higher-resolution time stamps.
3361 ** New input reading functions
3363 *** New function `read-char-choice' reads a restricted set of
3364 characters, discarding any inputs not inside the set.
3366 *** The command `read-color' now requires a match for a color name
3367 or RGB triplet, instead of signaling an error if the user provides
3370 **** `facemenu-read-color' is now an alias for `read-color'.
3372 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3373 The variable is now used to load all kind of supported dynamic libraries,
3374 not just image libraries. The previous name is still available as an
3377 ** Syntax parsing changes
3379 *** New variable `syntax-propertize-function'.
3380 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3381 This allows syntax-table properties to be set independently from font-lock:
3382 just call syntax-propertize to make sure the text is propertized.
3383 Together with this new variable come a new hook
3384 syntax-propertize-extend-region-functions, as well as two helper functions:
3385 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3386 as-is; and syntax-propertize-rules which provides a new way to specify
3389 *** Syntax tables support a new "comment style c" additionally to style b.
3391 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3393 ** frame-local variables cannot be let-bound any more.
3395 ** Major and minor mode changes
3397 *** `set-auto-mode' now respects mode: local variables at the end of files,
3398 as well as those in the -*- line.
3400 *** `prog-mode' is a new major mode from which programming modes
3403 **** `prog-mode-hook' can be used to enable features for programming
3404 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3405 on-the-fly spell checking for comments and strings.
3407 **** New minor modes `prettify-symbols-mode' and
3408 `global-prettify-symbols-mode' let the user enable symbol
3409 prettification (replacing a string like "lambda" with the Greek lambda
3412 *** New hook `change-major-mode-after-body-hook', run by
3413 `run-mode-hooks' just before any other mode hooks.
3415 *** Enabled globalized minor modes can be disabled in specific major modes.
3416 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3417 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3419 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3421 ** File-handling changes
3423 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3424 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3425 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3426 argument is supplied (see Trash changes, above).
3428 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3430 ** Tool-bars can display separators.
3431 Tool-bar separators are handled like menu separators in menu-bar maps,
3432 i.e. via menu entries of the form `(menu-item "--")'.
3436 *** Animated images support (currently animated gifs only).
3438 **** `image-animated-p' returns non-nil if an image can be animated.
3440 **** `image-animate' animates a supplied image spec.
3442 **** `image-animate-timer' returns the timer object for an image that
3445 *** `image-extension-data' has been renamed to `image-metadata'.
3446 The old name is an obsolete alias to the new one.
3448 *** Image mode can view any image type that ImageMagick supports.
3449 This requires Emacs to be built with ImageMagick support.
3451 **** New function `imagemagick-types', defined if ImageMagick support
3452 is enabled, returns a list of image file extensions that your
3453 ImageMagick installation supports.
3455 **** New function `imagemagick-register-types' enables ImageMagick
3456 image types in Image mode and in `create-image' and other helper
3459 **** New option `imagemagick-types-inhibit' excludes certain
3460 ImageMagick image types from `imagemagick-register-types'.
3462 **** With ImageMagick support, there are extra Image mode commands to
3463 resize and rotate images: `image-transform-fit-to-height',
3464 `image-transform-fit-to-width', `image-transform-set-rotation', and
3465 `image-transform-set-scale'.
3467 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3468 passes it to the mail user agent function. This argument specifies an
3469 action for returning to the caller after finishing with the mail. For
3470 example, this is used by Rmail to optionally delete a mail window.
3472 ** XML and HTML parsing
3473 If Emacs is compiled with libxml2 support, there are two new
3474 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3475 and `libxml-parse-xml-region' (which parses XML). Both return an
3476 Emacs Lisp parse tree.
3478 ** Networking and encryption changes
3480 *** `open-network-stream' can now be used to open an encrypted stream.
3481 It now accepts an optional `:type' parameter for initiating a TLS
3482 connection, directly or via STARTTLS. To do STARTTLS, additional
3483 parameters (`:end-of-command', `:success', `:capabilities-command')
3484 must also be supplied.
3486 *** New library gnutls.el.
3487 The new function `gnutls-available-p' returns non-nil if Emacs is
3488 built with GnuTLS support. The main entry points are
3489 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3490 these functions through `open-network-stream', because that can
3491 upgrade connections through STARTTLS opportunistically or use plain
3492 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3495 *** New primitive `secure-hash' that supports many secure hash algorithms:
3496 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3497 sha1.el has been removed. The `sha1' feature is provided by default.
3501 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3503 ** Progress reporters can now "spin".
3504 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3505 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3506 time you call `progress-reporter-update' on that progress reporter,
3507 with a nil or omitted VALUE argument, the reporter message is
3508 displayed with a "spinning bar".
3510 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3511 being reverted, even if the buffer has a local `revert-buffer-function'.
3513 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3514 If delayed-warnings-list is non-nil, the command loop calls
3515 `delayed-warnings-hook' after `post-command-hook'. At present, this
3516 is only used by Emacs on some platforms to display warnings during
3517 startup, which might otherwise not be noticed. This uses the
3518 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3520 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3522 ** New function `make-composed-keymap' that constructs a new keymap
3523 from multiple input maps. You can use this to make a keymap that
3524 inherits from multiple maps, eg:
3525 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3527 ** New function `string-prefix-p'.
3528 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3530 ** New reader macro ## that stands for the empty symbol.
3531 This means that the empty symbol can now be read back. Also, #: by itself
3532 (when not immediately followed by a possible symbol character) stands for
3533 an empty uninterned symbol.
3535 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3537 ** The following functions and variables are obsolete:
3539 *** `tooltip-use-echo-area' is obsolete.
3540 Rather than setting this to t, disable Tooltip mode instead.
3542 *** buffer-substring-filters is obsolete.
3543 Use `filter-buffer-substring-functions' instead.
3545 *** `byte-compile-disable-print-circle' is obsolete.
3547 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3548 Use `post-command-hook' instead.
3550 *** `font-lock-maximum-size' is obsolete.
3553 * Changes in Emacs 24.1 on Non-Free Operating Systems
3555 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3556 and also when HOME is set to C:\ by default.
3558 ** New configure.bat options
3560 *** --enable-checking builds Emacs with extra runtime checks.
3562 *** --distfiles specifies files to be included in binary distribution.
3564 *** --without-gnutls disables automatic GnuTLS detection.
3566 *** --lib for general library linkage, works with the USER_LIBS build variable.
3568 ** New make target `dist' to create binary distribution for MS Windows.
3570 ** The Lisp function `w32-default-color-map' is now obsolete.
3571 (It is only used internally in the Emacs C code.)
3573 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3574 reappear on mouse-over. (Requires OS X 10.6 or later.)
3576 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3577 other platforms, rather than inserting its contents into the buffer.
3580 ----------------------------------------------------------------------
3581 This file is part of GNU Emacs.
3583 GNU Emacs is free software: you can redistribute it and/or modify
3584 it under the terms of the GNU General Public License as published by
3585 the Free Software Foundation, either version 3 of the License, or
3586 (at your option) any later version.
3588 GNU Emacs is distributed in the hope that it will be useful,
3589 but WITHOUT ANY WARRANTY; without even the implied warranty of
3590 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3591 GNU General Public License for more details.
3593 You should have received a copy of the GNU General Public License
3594 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3599 paragraph-separate: "[
\f]*$"