1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `without-compress-info' has been generalized,
38 and renamed to `without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option --with-crt-dir has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support. If this library is present
49 (which it normally is on most systems), the function
50 `zlib-decompress-region' becomes available, which can decompress gzip-
51 and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 ** When initializing `load-path', an empty element in the EMACSLOADPATH
67 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
68 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
69 load-path (the one that would have been used if EMACSLOADPATH was unset).
70 This makes it easier to _extend_ the load-path via EMACSLOADPATH
71 (previously, EMACSLOADPATH had to specify the complete load-path,
72 including the defaults). (In older versions of Emacs, an empty element
73 was replaced by ".", so use an explicit "." now if that is what you want.)
76 ** The -L option, which normally prepends its argument to load-path,
77 will instead append, if the argument begins with `:' (or `;' on MS Windows;
78 i.e., `path-separator').
81 ** If you use either site-load.el or site-init.el to customize the dumped
82 Emacs executable, any changes to `load-path' that these files make
83 will no longer be present after dumping. To affect a permanent change
84 to `load-path', use the `--enable-locallisppath' option of `configure'.
87 * Changes in Emacs 24.4
90 ** Emacs now supports menus on text-mode terminals.
91 If the terminal supports a mouse, clicking on the menu bar, or on
92 sensitive portions of the mode line or header line, will drop down the
93 menu defined at that position. Likewise, clicking C-mouse-2 or
94 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
97 If the text terminal does not support a mouse, you can activate the
98 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
100 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
101 customize the option `tty-menu-open-use-tmm' to a non-nil value.
102 (Typing M-` will always invoke `tmm-menubar', even if
103 `tty-menu-open-use-tmm' is nil.)
105 ** Key ? also describes prefix bindings like C-h.
108 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
109 because it affects caching of paragraph scanning results as well.
112 ** `apropos-variable' is now `apropos-user-option'
113 `apropos-user-option' shows all user options while `apropos-variable'
114 shows all variables. When called with a universal prefix argument,
115 the two commands swap their behaviors. When `apropos-do-all' is
116 non-nil, they output the same results.
119 ** `eval-defun' on an already defined defcustom calls the :set function,
122 ** If the new variable `enable-dir-local-variables' is nil,
123 directory local variables are ignored. May be useful for some modes
124 that want to ignore directory-locals while still respecting file-locals.
126 ** The option `set-mark-default-inactive' has been deleted.
127 This unfinished feature was introduced by accident in Emacs 23.1;
128 simply disabling Transient Mark mode does the same thing.
130 ** `initial-buffer-choice' can now specify a function to set up the
133 ** The *Messages* buffer is created in a new major mode `messages-buffer-mode',
134 and read-only. Code that might create the *Messages* buffer should
135 call the function `messages-buffer' to do so and set the mode.
137 ** `remember-notes' creates a buffer whose content is saved on kill-emacs.
138 You may think of it as a *scratch* buffer whose content is preserved.
139 In fact, it was designed as a replacement for *scratch* buffer and can
140 be used that way by setting `initial-buffer-choice' to `remember-notes'
141 and `remember-notes-buffer-name' to "*scratch*". Without the second
142 change, *scratch* buffer will still be there for notes that do not
143 need to be preserved.
145 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
147 ** ACL support has been added.
149 *** Emacs preserves the ACL entries of files when backing up.
151 *** New functions `file-acl' and `set-file-acl' get and set the ACL
152 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
153 libacl. On MS-Windows, the NT Security APIs are used to emulate the
154 POSIX ACL interfaces.
156 ** New option `scroll-bar-adjust-thumb-portion'.
157 Available only on X, this option allows to control over-scrolling
158 using the scroll bar (i.e. dragging the thumb down even when the end
159 of the buffer is visible).
161 ** New function `add-face-text-property' has been added, which can be
162 used to conveniently prepend/append new face attributes to text.
164 ** In compiled Lisp files, the header no longer includes a timestamp.
166 ** Multi-monitor support has been added.
168 *** New functions `display-monitor-attributes-list' and
169 `frame-monitor-attributes' can be used to obtain information about
170 each physical monitor on multi-monitor setups.
172 *** The functions `display-pixel-width' and `display-pixel-height' now
173 behave consistently among the platforms: they return the pixel width
174 or height for all physical monitors associated with the given display
175 as just they were on X11. To get information for each physical
176 monitor, use the new functions above. Similar notes also apply to
177 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
178 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
180 ** New macro `define-alternatives' can be used to define generic commands.
181 Generic commands are interactive functions whose implementation can be
182 selected among several alternatives, as a matter of user preference.
184 ** New hooks `focus-in-hook', `focus-out-hook'.
185 These are normal hooks run when an Emacs frame gains or loses input focus.
187 ** The blink cursor stops blinking after 10 blinks (default) on X and NS.
188 You can change the default by customizing the variable blink-cursor-blinks.
189 Also timers for blinking are stopped when no blinking is done, so Emacs does
190 not consume CPU cycles.
192 ** New command `frameset-to-register' is now bound to `C-x r f', replacing
193 `frame-configuration-to-register'. It offers similar functionality, plus
194 some enhancements, like the ability to restore deleted frames. Command
195 `frame-configuration-to-register' is still available, but unbound.
197 ** The command `quail-help' is deleted. Use `C-h C-\'
198 (`describe-input-method') instead.
200 ** The default value of `comment-use-global-state' is changed to t,
201 and this variable has been marked obsolete.
203 ** `fill-single-char-nobreak-p' prevents fill from breaking a line after
204 a 1-letter word, which is an error according to Polish and
205 Czech typography rules. To globally enable this feature, evaluate:
207 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
210 * Editing Changes in Emacs 24.4
212 ** `electric-indent-mode' is enabled by default.
214 ** Uniquify is enabled by default with post-forward-angle-brackets style.
216 ** Command `rectangle-mark-mode' bound to C-x SPC makes a rectangular region.
217 Most commands are still unaware of it, but kill/yank do work on the rectangle.
219 ** C-x TAB enters a transient interactive mode.
220 You can then use the left/right cursor keys to move the block of text.
222 ** `tab-stop-list' is now implicitly extended to infinity by repeating
223 the last step. Its default value is changed to nil which means a tab
224 stop every `tab-width' columns.
226 ** `split-window' is no longer a command, just a non-interactive function.
227 As a command it was a special case of `split-window-below', and as such
228 superfluous. After being reimplemented in Lisp, its interactive form
229 was mistakenly retained.
231 ** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
232 bound to <f11> and M-<f10>, respectively.
234 ** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
238 ** New option `visual-order-cursor-movement'.
239 If this is non-nil, cursor motion with arrow keys will follow the
240 visual order of characters on the screen: <left> always moves to the
241 left, <right> always moves to the right, disregarding the surrounding
242 bidirectional context.
244 ** All register commands can now show help with preview.
246 ** New command `kmacro-to-register' to store keyboard macros in registers.
250 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
251 You can pick the name of the function and the variables with `C-x 4 a'.
254 * Changes in Specialized Modes and Packages in Emacs 24.4
257 *** CUA-mode was changed to make use of delete-selection-mode and
258 shift-select-mode. So you can now enable it independently from
259 transient-mark-mode, delete-selection-mode, and shift-select-mode.
260 As a result, cua-highlight-region-shift-only is obsolete
261 (you can disable transient-mark-mode to get the same result).
262 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
264 ** `delete-selection-mode' can be used without transient-mark-mode.
266 ** prolog-use-smie has been removed, along with the non-SMIE indentation code.
268 ** SMIE indentation can be customized via `smie-config'.
269 The customization can be guessed by Emacs by providing a sample indented
270 file and letting SMIE learn from it.
272 ** sh-script now uses its SMIE indentation algorithm by default.
274 ** `eshell' now supports visual subcommands and options
275 Eshell has been able to handle "visual" commands (interactive,
276 non-line oriented commands such as top that require display
277 capabilities not provided by eshell) by running them in an Emacs
278 terminal emulator. See `eshell-visual-commands'.
280 This feature has been extended to subcommands and options that make a
281 usually line-oriented command a visual command. Typical examples are
282 "git log" and "git <command> --help" which display their output in a
283 pager by default. See `eshell-visual-subcommands' and
284 `eshell-visual-options'.
286 ** If your Emacs is compiled with libxml2 support, you can use the new
287 built-in web browser `eww'.
289 ** `remember' can now store notes in separates files
290 You can use the new function `remember-store-in-files' within the
291 `remember-handler-functions' option.
293 See `remember-data-directory' and `remember-directory-file-name-format'
294 for new options related to this function.
296 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
298 ~/.emacs.d/timelog replaces ~/.timelog
299 ~/.emacs.d/vip replaces ~/.vip
300 ~/.emacs.d/viper replaces ~/.viper
301 ~/.emacs.d/ido.last replaces ~/.ido.last
302 ~/.emacs.d/kkcrc replaces ~/.kkcrc
303 ~/.emacs.d/quickurls replaces ~/.quickurls
304 ~/.emacs.d/idlwave replaces ~/.idlwave
305 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
306 ~/.emacs.d/places replaces ~/.emacs-places
307 ~/.emacs.d/shadows replaces ~/.shadows
308 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
309 ~/.emacs.d/strokes replaces ~/.strokes
310 ~/.emacs.d/notes replaces ~/.notes
311 ~/.emacs.d/type-break replaces ~/.type-break
312 Also the following files used by the now obsolete otodo-mode.el:
313 ~/.emacs.d/todo-do replaces ~/.todo-do
314 ~/.emacs.d/todo-done replaces ~/.todo-done
315 ~/.emacs.d/todo-top replaces ~/.todo-top
318 ** Delphi mode is now called OPascal mode.
319 *** All delphi-* variables and functions have been renamed to opascal-*.
320 *** `delphi-newline-always-indents' is not supported any more.
321 Use `electric-indent-mode' instead.
322 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
324 ** Eldoc Mode works properly in the minibuffer.
326 ** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
328 ** completing-read-multiple's separator can now be a regexp.
329 The default separator is changed to allow surrounding spaces around the comma.
331 ** The backtrace debugger and local variables:
332 *** The debugger's `e' command evaluates the code in the context at point.
333 This includes using the lexical environment at point, which means that
334 `e' now lets you access lexical variables as well.
335 *** The backtrace debugger can display local vars with `v'.
339 *** Battery information via the BSD `apm' utility is now supported.
343 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
345 ** Calendar and Diary
347 *** New faces: `calendar-weekday-header', `calendar-weekend-header',
348 `calendar-month-header'.
350 *** New option `calendar-day-header-array'.
352 *** The variable `calendar-font-lock-keywords' is obsolete.
355 *** New variable `diary-from-outlook-function', used by the command
356 `diary-from-outlook'.
358 ** VC and related modes
360 *** In VC directory mode, `D' displays diffs between VC-controlled
361 whole tree revisions.
363 *** In VC directory mode, `L' lists the change log for the current VC
364 controlled tree in a window.
366 *** In VC directory mode, `I' shows a log of changes that will be
367 received with a pull operation.
369 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
370 under current version control system. When called with a prefix
371 argument, you can remove a file from the ignored file list.
373 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
374 because it is moved to vc-cvs.el.
378 *** New macro cl-tagbody.
381 *** letf is now just an alias for cl-letf.
385 *** Calc by default now uses the Gregorian calendar for all dates, and
386 uses January 1, 1 AD as its day number 1. Previously Calc used the
387 Julian calendar for dates before September 14, 1752, and it used
388 December 31, 1 BC as its day number 1; the new scheme is more
389 consistent with Calendar's calendrical system and day numbering.
391 *** The new variable `calc-gregorian-switch' lets you configure the
392 date when Calc switches from the Julian to the Gregorian calendar.
393 Nil, the default value, means to always use the Gregorian calendar.
394 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
397 *** Support for ISO 8601 dates.
401 *** `desktop-auto-save-timeout' defines the number of seconds idle time
402 before auto-save of the desktop.
404 *** `desktop-restore-frames', enabled by default, allows saving and
405 restoring the frame/window configuration (frameset). Additional options
406 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
407 and `desktop-restore-forces-onscreen' offer further customization.
411 *** New minor mode `dired-hide-details-mode' hides details.
415 *** New option `erc-accidental-paste-threshold-seconds'.
416 If set to a number, this can be used to avoid accidentally paste large
417 amounts of data into the ERC input.
421 *** New option `epa-mail-aliases'.
423 You can set this to a list of alias expansions for keys to use
424 in `epa-mail-encrypt'.
426 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
427 that means: when one of the recipients of the message being encrypted
428 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
430 If one element of the variable's value is ("foo@bar.com"),
431 that means: when one of the recipients of the message being encrypted
432 is `foo@bar.com', ignore that name as regards encryption.
433 This is useful to avoid a query when you have no key for that name.
436 ** New F90 mode option `f90-smart-end-names'.
438 ** Icomplete is a bit more like Ido.
439 *** key bindings to navigate through and select the completions.
440 *** The icomplete-separator is customizable, and its default has changed.
441 *** Removed icomplete-show-key-bindings.
442 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
443 (setq icomplete-with-completion-tables '(internal-complete-buffer))
444 will revert to the old behavior.
447 ** New features for Octave mode:
448 *** Font locking for texinfo comments and new keywords
449 *** Completion in Octave file buffers
451 *** Jump to definition
452 *** Documentation lookup/search
453 *** Code cleanup and various bug fixes
456 *** Ido has a manual now.
457 *** `ido-use-virtual-buffers' takes a new value 'auto.
458 *** `ido-decorations' has been slightly extended to give a bit more control.
462 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
463 visit the next image file and the previous image file in the same
464 directory, respectively.
466 *** New commands to show specific frames of multi-frame images.
467 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
468 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
470 *** New commands to speed up, slow down, or reverse animation.
473 *** The command `image-mode-fit-frame' deletes other windows.
474 When toggling, it restores the frame's previous window configuration.
475 It also has an optional frame argument, which can be used by Lisp
476 callers to fit the image to a frame other than the selected frame.
480 *** New face `info-index-match' is used to highlight matches in index
481 entries displayed by `Info-index-next', `Info-virtual-index' and
486 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
487 will cycle through faces in `hi-lock-face-defaults' without prompting.
490 *** New global command `M-s h .' (`highlight-symbol-at-point')
491 highlights the symbol found near point without prompting,
492 using the next face automatically.
494 ** Search and Replace
496 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
497 starts a symbol (identifier) incremental search forward with the
498 symbol found near point added to the search string initially.
500 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
501 and adds it to the search string.
503 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
504 between nil and the value of the option `search-invisible' (or `open'
507 *** `query-replace' skips invisible text when `search-invisible' is nil,
508 and opens overlays with hidden text when `search-invisible' is `open'.
511 *** By default, prefix arguments do not now terminate Isearch mode.
512 Set `isearch-allow-prefix' to nil to restore old behavior.
514 *** More Isearch commands accept prefix arguments, namely
515 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
518 *** Word search now matches whitespace at the beginning/end
519 of the search string if it contains leading/trailing whitespace.
520 In an incremental word search or when using a non-nil LAX argument
521 of `word-search-regexp', the lax matching can also match part of
522 the first word (in addition to the lax matching of the last word).
523 The same rules are now applied to the symbol search with the difference
524 that it matches symbols, and non-symbol characters between symbols.
526 ** MH-E has been updated to MH-E version 8.5.
527 See MH-E-NEWS for details.
530 ** The unrmail command converts from BABYL to mboxrd rather than mboxo.
531 Customize `unrmail-mbox-format' to change this.
534 ** Similarly, customize `rmail-mbox-format' to influence some minor aspects
535 of how Rmail displays non-MIME messages.
538 ** New function `ses-rename-cell' to give SES cells arbitrary names.
540 ** trace-function was largely rewritten.
541 New features include:
542 - no prompting for the destination buffer, unless a prefix-arg was used.
543 - additionally to prompting for a destination buffer, when a prefix-arg is
544 used, the user can enter a "context", i.e. Lisp expression whose value at the
545 time the function is entered/exited will be printed along with the function
546 name and arguments. Useful to trace the value of (current-buffer) or
547 (point) when the function is invoked.
549 ** New command `delete-duplicate-lines' has new types of operation:
550 When its arg ADJACENT is non-nil (when called interactively with C-u C-u)
551 it works like the utility `uniq'. Otherwise by default it deletes
552 duplicate lines everywhere in the region without regard to adjacency.
553 When its arg KEEP-BLANKS is non-nil (when called interactively with
554 C-u C-u C-u), duplicate blank lines are preserved.
556 ** New `cycle-spacing' command allows cycling between having just one
557 space, no spaces, or reverting to the original spacing. Like
558 `just-one-space' command it can handle or ignore newlines and
559 leave different number of spaces.
561 ** Todo mode has been rewritten and enhanced.
562 New features include:
563 - support for multiple todo files and archive files of done items;
564 - renaming, reordering, moving, merging, and deleting categories;
565 - sortable tabular summaries of categories and the types of items they contain;
566 - cross-category lists of items filtered by specific criteria;
567 - more fine-grained interaction with the Emacs diary, by being able to decide
568 for each todo item whether it appears in the Fancy Diary display;
569 - highly flexible new item insertion and item editing;
570 - moving items between categories, storing done items in their category or in
571 archive files, undoing or unarchiving done items;
572 - reprioritizing items by inputting a numerical priority;
573 - extensive customizability of operation and display, including numerous faces.
574 The Todo mode user manual describes all commands and most user options.
575 To support some of these features, a new file format is used, which is
576 incompatible with the old format; however, you can convert old todo and done
577 item files to the new format on initializing the first new todo file, or at any
578 later time with the provided conversion command. The old version of
579 todo-mode.el has been made obsolete and renamed otodo-mode.el.
583 *** The experimental url syntax for remote file names is withdrawn.
586 *** New connection method "adb", which allows to access Android
587 devices by the Android Debug Bridge. The variable `tramp-adb-program'
588 can be used to adapt the path of the "adb" program, if needed.
590 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
591 "scpc" and "rsyncc" are discontinued. The ssh option
592 "ControlMaster=auto" is set automatically in all ssh-based methods,
596 *** Handlers for `file-acl' and `set-file-acl' for remote machines
597 which support POSIX ACLs.
600 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
601 for remote machines which support filesystem notifications.
605 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
607 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
611 *** The commands `woman-default-faces' and `woman-monochrome-faces'
612 are obsolete. Customize the `woman-*' faces instead.
616 *** Added Eshell-Tramp module
617 External su and sudo commands are now the default; the internal,
618 Tramp-using variants can still be used by enabling the eshell-tramp
623 *** The format of `archive-contents' files, generated by package
624 repositories, has changed to allow a new (fifth) element in the data
625 vectors, containing an associative list with extra properties.
627 *** `describe-package' buffer uses the `:url' extra property to
628 display a `Homepage' header, if it's present.
630 ** New term.el option `term-suppress-hard-newline'.
636 **** The cpp-root project now supports executing a compile command.
637 It can be set through the new :compile-command slot or the
638 buffer-local variable `compile-command'.
640 **** Better selection of include directories for the 'linux' project.
641 Include directories now support out-of-tree build directories and
642 target architecture auto-detection.
646 **** Improved detection of used namespaces in current scope in C++.
648 **** Parsing of default values for variables and function arguments in C/C++.
649 They are also displayed by the summarize feature in the modeline.
651 **** Improved parsing of function pointers in C/C++.
652 This also includes parsing of function pointers as function arguments.
654 **** Parsing of C/C++ preprocessor macros which open new scope.
655 For example, this enables parsing of macros which open new namespaces.
657 **** Support for 'this' pointer in inline member functions in C++.
659 ** Obsolete packages:
661 *** Iswitchb is made obsolete by icomplete-mode.
663 *** longlines.el is obsolete; use visual-line-mode instead.
668 *** terminal.el is obsolete; use term.el instead.
670 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
675 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
678 *** The Info-edit command is obsolete. Editing Info nodes by hand
679 has not been relevant for some time.
683 *** `explicit-bash-args' now always defaults to use --noediting.
684 During initialization, Emacs no longer expends a process to decide
685 whether it is safe to use Bash's --noediting option. These days
686 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
689 ** There is a new macro `skip-unless' for skipping ERT tests. See the manual.
693 *** New option `imenu-generic-skip-comments-and-strings'.
697 *** New option `ruby-encoding-magic-comment-style'.
699 *** New option `ruby-custom-encoding-magic-comment-template'.
703 *** Improved syntax highlighting and indentation.
705 *** Add more Ruby file types to `auto-mode-alist'.
709 *** Better indentation of multiple-variable declarations.
710 If declaration spans several lines, variables on the following lines
711 are lined up to the first one.
713 *** We now recognize and better indent continuations in array
716 *** New option `js-switch-indent-offset`.
719 * New Modes and Packages in Emacs 24.4
721 ** New `superword-mode' in subword.el
722 `superword-mode' overrides the default word motion commands to treat
723 symbol_words as a single word, similar to what `subword-mode' does and
724 using the same internal functions.
726 ** New nadvice.el package offering lighter-weight advice facilities.
728 - add-function/remove-function which can be used to add/remove code on any
729 function-carrying place, such as process-filters or `<foo>-function' hooks.
730 - advice-add/advice-remove to add/remove a piece of advice on a named function,
731 much like `defadvice' does.
733 ** New frameset.el package.
734 It provides a set of operations to save a frameset (the state of all
735 or a subset of the existing frames and windows, somewhat similar to a
736 frame configuration), both in-session and persistently, and restore it
737 at some point in the future.
740 ** The package filenotify.el provides an interface for file system
741 notifications. It requires, that Emacs is compiled with one of the
742 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
745 * Incompatible Lisp Changes in Emacs 24.4
747 ** `kill-region' lost its `yank-handler' optional argument.
749 ** `(input-pending-p)' no longer runs other timers which are ready to
750 run. The new optional CHECK-TIMERS param allows for the prior behavior.
752 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
754 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
755 Some languages match those as »...« and others as «...» so better stay neutral.
757 ** The default file coding for Emacs Lisp files is now utf-8.
758 (See file-coding-system-alist.) In most cases, this change is transparent, but
759 files that contain unusual characters without specifying an explicit coding
760 system may fail to load with obscure errors.
761 You should either convert them to utf-8 or add an explicit `coding:' cookie.
763 ** overriding-terminal-local-map does not replace the local keymaps any more.
764 It used to disable the minor mode, major mode, and text-property keymaps,
765 whereas now it simply has higher precedence.
767 ** Default process filters and sentinels are not nil any more.
768 Instead they default to a function which does what the nil value used to do.
770 ** `read-event' does not return decoded chars in ttys any more.
771 Just as was the case in Emacs-22 and before, decoding of tty input according to
772 keyboard-coding-system is not performed in read-event any more. But contrary
773 to that past, it is still done before input-decode-map/function-key-map/...
775 ** Removed inhibit-local-menu-bar-menus.
777 ** frame-local variables that affect redisplay do not work any more.
778 More specifically, the redisplay does not bother to check for a frame-local
779 value when looking up variables.
781 ** nil and "unbound" are indistinguishable in symbol-function.
782 `symbol-function' never signals `void-function' any more.
783 `fboundp' returns non-nil if the symbol was `fset' to nil.
785 ** `defadvice' does not honor the `freeze' flag and cannot advise
786 special-forms any more.
788 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
789 VAR was bound to nil which was not tremendously useful and just lead to
790 spurious warnings about an unused var.
792 ** The return value of `backup-buffer' has changed.
793 The second argument is no longer an SELinux context, instead it is an
794 alist of extended attributes as returned by the new function
795 `file-extended-attributes'. The attributes can be applied to another
796 file using `set-file-extended-attributes'.
798 ** `visited-file-modtime' now returns -1 for nonexistent files.
799 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
800 in the presence of files with negative time stamps.
802 ** The cars of the elements in `interpreter-mode-alist' are now treated
803 as regexps rather than literal strings. Technically this is an
804 incompatible change, but unless you are using interpreter-mode-alist
805 for something (not just adding elements to it), it ought not to affect you.
808 * Lisp Changes in Emacs 24.4
810 ** New option `load-prefer-newer', if non-nil, means that when both
811 .el and .elc versions of a file exist, rather than `load' always
812 choosing the .elc version, it will choose whichever is newer
813 (unless you explicitly specify one or the other).
815 ** New function get-pos-property.
817 ** New hook `pre-redisplay-function'.
820 ** Functions that pop up menus and dialogs now work on all terminal types,
822 This includes `x-popup-menu', `x-popup-dialog', `message-box',
825 The function `display-popup-menus-p' will now return non-nil for a
826 display or frame whenever a mouse is supported on that display or
829 ** New bool-vector set operation functions:
830 *** `bool-vector-exclusive-or'
831 *** `bool-vector-union'
832 *** `bool-vector-intersection'
833 *** `bool-vector-set-difference'
834 *** `bool-vector-not'
835 *** `bool-vector-subsetp'
836 *** `bool-vector-count-consecutive'
837 *** `bool-vector-count-population'
839 ** Comparison functions =, <, >, <=, >= now take many arguments.
841 ** The second argument of `eval' can now be a lexical-environment.
843 ** `with-demoted-errors' takes an additional argument `format'.
845 ** New function `define-error'.
847 ** New hook `tty-setup-hook'.
850 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
852 ** New library helpers.el for misc helper functions
853 *** `hash-table-keys'
854 *** `hash-table-values'
859 *** `string-trim-left'
860 *** `string-trim-right'
863 ** Obsoleted functions:
866 *** `lisp-complete-symbol'
868 *** `minibuffer-completion-contents'
869 *** `isearch-nonincremental-exit-minibuffer'
870 *** `isearch-filter-visible'
871 *** `generic-make-keywords-list'
873 ** `with-wrapper-hook' is obsoleted by `add-function'.
874 The few hooks that used with-wrapper-hook are replaced as follows:
875 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
876 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
877 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
879 ** `byte-compile-interactive-only-functions' is now obsolete.
880 It has been replaced by the symbol property 'interactive-only.
882 ** `split-string' now takes an optional argument TRIM.
883 The value, if non-nil, is a regexp that specifies what to trim from
884 the start and end of each substring.
886 ** New function `string-suffix-p'.
888 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
890 ** Support for filesystem notifications.
891 Emacs now supports notifications of filesystem changes, such as
892 creation, modification, and deletion of files. This requires the
893 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
894 MS-Windows systems, this is supported for Windows XP and newer
897 ** Changes in autorevert.el
900 *** If Emacs is compiled with file notification support, notifications
901 are used instead of checking the time stamp of the files. You can
902 disable this by setting the user option `auto-revert-use-notify' to
903 nil. Alternatively, a regular expression of directories to be
904 excluded from file notifications can be specified by
905 `auto-revert-notify-exclude-dir-regexp'.
908 *** The new user option `auto-revert-remote-files' enables reversion
909 of remote files when set to non-nil.
913 *** The function `face-spec-set' is now analogous to `setq' for face specs.
914 Its third arg now accepts values specifying exactly which face spec to
915 set (defface, custom, or user spec), and it directly sets the relevant
916 property using the supplied face spec.
918 *** Face specs set via Custom themes now replace the `defface' spec
919 rather than inheriting from it (as do face specs set via Customize).
921 *** New face characteristic (supports :underline (:style wave))
922 specifies whether or not the terminal can display a wavy line.
924 *** New face spec attribute :distant-foreground
925 specifies foreground to use if background color is near the foreground
926 color that would otherwise have been used.
931 *** `image-animated-p' is now `image-multi-frame-p'.
932 It returns non-nil for any image that contains multiple frames,
933 whether or not it specifies a frame delay.
936 *** When animating images that do not specify a frame delay,
937 Emacs uses `image-default-frame-delay'.
940 *** New functions `image-current-frame' and `image-show-frame' for getting
941 and setting the current frame of a multi-frame image.
943 *** You can change the speed of animated images.
947 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
948 **** object-name -> eieio-object-name
949 **** object-class -> eieio-object-class
950 **** object-class-fast -> eieio--object-class
951 **** object-name-string -> eieio-object-name-string
952 **** object-num-slots -> eieio--object-num-slots
953 **** object-set-name-string -> eieio-object-set-name-string
954 **** class-parent -> eieio-class-parent
955 **** class-parents -> eieio-class-parents
956 **** class-children -> eieio-class-children
957 **** class-num-slots -> eieio--class-num-slots
958 **** class-precedence-list -> eieio-class-precedence-list
959 **** All generated class-* and object-* field accessors are now
960 prefixed with `eieio-' as well.
962 *** Obsoleted functions:
964 **** class-direct-subclasses
965 **** class-direct-superclasses
967 ** Changes in encoding and decoding of text
970 *** New coding-system `prefer-utf-8'.
971 This is like `undecided' but prefers UTF-8 on decoding if the text to
972 be decoded does not contain any invalid UTF-8 sequences. On encoding,
973 any non-ASCII characters are automatically encoded as UTF-8.
976 *** New attributes of coding-systems whose type is `undecided'.
977 Two new attributes, `:inhibit-null-byte-detection' and
978 `:inhibit-iso-escape-detection', determine how to detect encoding of
979 text that includes null bytes and ISO-2022 escape sequences,
980 respectively. Each of these attributes can be either nil, zero, or
981 t. If it is t, decoding text ignores null bytes and, respectively,
982 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
983 with no-conversion and ISO-2022 sequences cause Emacs to assume the
984 text is encoded in one of the ISO-2022 encodings, such as
985 iso-2022-7bit. If the value is zero, Emacs consults the variables
986 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
988 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
989 UTF-8 encoding and decoding, whenever possible.
991 These attributes are only meaningful for coding-systems of type
992 `undecided'. (The type of a coding-system is determined by its
993 `:coding-type' attribute and can be accessed by calling the
994 `coding-system-type' function.)
996 ** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
997 with the same interpretation as the returned value of `visited-file-modtime'.
999 ** time-to-seconds is not obsolete any more.
1000 ** New functions special-form-p and macrop.
1001 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1002 text-property on the first char.
1004 ** The `defalias-fset-function' property lets you catch calls to defalias
1005 and redirect them to your own function instead of `fset'.
1007 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1008 When you edit DIR/FILE, Emacs normally creates a symbolic link
1009 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1010 is being edited. Formerly, if there was already a non-symlink file
1011 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1012 through DIR/.#FILE.9. These fallbacks have been removed, so that
1013 Emacs now no longer locks DIR/FILE in that case.
1015 On file systems that do not support symbolic links, the lock is now a
1016 regular file with contents being what would have been in the symlink.
1018 ** The 9th element returned by `file-attributes' is now unspecified.
1019 Formerly, it was t if the file's gid would change if file were deleted
1020 and recreated. This value has been inaccurate for years on many
1021 platforms, and nobody seems to have noticed or cared.
1023 ** The function `file-ownership-preserved-p' now has an optional
1024 argument GROUP which causes it check for file group too. This can be
1025 used in place of the 9th element of `file-attributes'.
1027 ** New functions `group-gid' and `group-real-gid'.
1029 ** The 6th argument to `copy-file' has been renamed to
1030 `preserve-extended-attributes' as it now handles both SELinux context
1033 ** The `common-substring' argument of display-completion-list is obsolete.
1034 Either use `completion-all-completions' which already returns highlighted
1035 strings (including for partial or substring completion) or call
1036 `completion-hilit-commonality' to add the highlight.
1038 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1040 *** The package descriptor and name of global variables, constants,
1041 and functions should be separated by two hyphens if the symbol is not
1042 meant to be used by other packages.
1045 * Changes in Emacs 24.4 on Non-Free Operating Systems
1047 ** The procedure for building Emacs on MS-Windows has changed.
1048 It is now built by running the same configure script as on all other
1049 platforms. This requires the MSYS environment and MinGW development
1050 tools. See the updated instructions in nt/INSTALL for details.
1052 Using the Posix configure script and Makefile's also means a change in
1053 the directory structure of the Emacs installation on Windows. It is
1054 now the same as on GNU and Unix systems. In particular, the auxiliary
1055 programs, such as cmdproxy.exe and hexl.exe, are in
1056 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1057 version), version-independent site-lisp is in share/emacs/site-lisp,
1058 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1059 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1060 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1061 directories and will find the files in there automatically; there's no
1062 need to set any variables due to this change.)
1065 ** Emacs on Windows 2000 and later can now access files and directories
1066 whose names cannot be encoded in the current system codepage.
1068 The new variable `w32-unicode-filenames' controls this feature: if it
1069 is t, Emacs uses Unicode APIs to pass file names to system calls,
1070 which lifts the limitation of file names to the current locale.
1073 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1074 The backtrace is written to the 'emacs_backtrace.txt' file in the
1075 directory where Emacs was running.
1078 ** The variable `buffer-file-type' is no longer supported.
1079 Setting it has no effect, and %t in the mode-line format is ignored.
1080 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1081 modifying it has no effect.
1084 ** Lock files now work on MS-Windows.
1085 This allows to avoid losing your edits if the same file is being
1086 edited in another Emacs session or by another user. See the node
1087 "Interlocking" in the Emacs User Manual for the details. To disable
1088 file locking, customize `create-lockfiles' to nil.
1090 ** Improved fullscreen support on Mac OS X.
1091 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1092 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1093 native is the default.
1096 * Installation Changes in Emacs 24.3
1098 ** The default X toolkit is now Gtk+ version 3.
1099 If you don't pass `--with-x-toolkit' to configure, or if you use
1100 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1101 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1102 You can explicitly require a specific version by passing
1103 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1105 ** New configure option `--enable-link-time-optimization', to utilize
1106 an appropriate feature provided by GCC since version 4.5.0.
1108 ** New configure option `--without-all' to disable most of the optional
1109 features (image support, etc.) that are normally enabled by default.
1111 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1112 Emacs). If building with GCC, this enables compile-time checks that
1113 warn/give errors about possibly-questionable C code. On a recent GNU
1114 system there should be no warnings; on older and on non-GNU systems
1115 the results may be useful to developers.
1117 ** The configure option `--enable-use-lisp-union-type' has been
1118 renamed to `--enable-check-lisp-object-type', as the resulting
1119 Lisp_Object type no longer uses a union to implement the compile time
1120 check that this option enables.
1122 ** The configure option `--disable-maintainer-mode' has been removed,
1123 as it was confusingly-named and rarely useful.
1125 ** The configure options `--program-prefix', `--program-suffix', and
1126 `--program-transform-name' apply to more than just the installed
1127 binaries. Now they also affect the man pages, icons, and the
1128 etc/emacs.desktop file; but not the info pages, since this would break
1129 links between the various manuals.
1131 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1132 overwriting "emacs" in the installation bin/ directory with a link
1135 ** Emacs uses libtinfo in preference to libncurses, if available.
1137 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1138 /usr/pkg/lib to the linker search path. You must add them yourself if
1141 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1142 (from the bin and libexec directories, respectively). The former is
1143 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1146 * Startup Changes in Emacs 24.3
1148 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1149 lisp/ directory. There should not be any there anyway. If you have
1150 been adding them there, put them somewhere else; e.g., site-lisp.
1152 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1155 * Changes in Emacs 24.3
1159 *** `C-h f' (`describe-function') can now perform autoloading.
1160 When this command is called for an autoloaded function whose docstring
1161 contains a key substitution construct, that function's library is
1162 automatically loaded, so that the documentation can be shown
1163 correctly. To disable this, set `help-enable-auto-load' to nil.
1165 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1166 even after their associated libraries have been loaded (and the
1167 autoloads have been redefined as functions).
1171 *** Images displayed via ImageMagick now support transparency and the
1172 :background image specification property.
1174 *** When available, ImageMagick support is automatically enabled.
1175 It is no longer necessary to call `imagemagick-register-types'
1176 explicitly to install ImageMagick image types; that function is called
1177 automatically at startup, or when customizing an imagemagick- option.
1179 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1180 ImageMagick to view images. (You must call `imagemagick-register-types'
1181 afterwards if you do not use customize to change this.)
1183 *** The new variable `imagemagick-enabled-types' also affects which
1184 ImageMagick types are treated as images. The function
1185 `imagemagick-filter-types' returns the list of types that will be
1188 *** ImageMagick images now support the :max-width and :max-height
1191 *** Some data types aren't auto-detected by ImageMagick. Adding
1192 :format to `create-image' may help if the content type is in the
1193 new variable `image-format-suffixes'.
1197 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1198 next and previous path separator, respectively.
1200 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1201 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1202 non-nil before enabling the mode.
1206 *** New option `mode-line-default-help-echo' specifies the help text
1207 (shown in a tooltip or in the echo area) for any part of the mode line
1208 that does not have its own specialized help text.
1210 *** You can now click mouse-3 in the coding system indicator to invoke
1211 `set-buffer-file-coding-system'.
1213 ** Server and client
1215 *** emacsclient now obeys string values for `initial-buffer-choice',
1216 if it is told to open a new frame without specifying any file to visit
1217 or expression to evaluate.
1219 *** New option `server-auth-key' specifies a shared server key.
1221 ** Emacs now generates backtraces on fatal errors.
1222 On encountering a fatal error, Emacs now outputs a textual description
1223 of the fatal signal, and a short backtrace on platforms like glibc
1224 that support backtraces.
1226 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1227 This minor mode replaces `toggle-read-only', which is now obsolete.
1229 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1230 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1231 respectively, without exiting from the prompt.
1233 ** In the Package Menu, newly-available packages are listed as "new",
1234 and sorted above the other "available" packages by default.
1236 ** If your Emacs was built from a bzr checkout, the new variable
1237 `emacs-bzr-version' contains information about the bzr revision used.
1239 ** New option `create-lockfiles' specifies usage of lockfiles.
1240 It defaults to t. Changing it to nil inhibits the creation of lock
1241 files (use this with caution).
1243 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1244 variables on remote hosts.
1246 ** The entry for PCL-CVS has been removed from the Tools menu.
1247 The PCL-CVS commands are still available via the keyboard.
1249 ** Using "unibyte: t" in Lisp source files is obsolete.
1250 Use "coding: raw-text" instead.
1252 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1253 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1254 The previous binding, introduced in Emacs 24.1, was a mistake, because
1255 `C-c LETTER' bindings are reserved for user customizations.
1257 ** Internationalization
1259 *** New language environment: Persian.
1261 *** New input method `vietnamese-vni'.
1263 ** Nextstep (GNUstep / Mac OS X) port
1265 *** Support for fullscreen and the frame parameter fullscreen.
1267 *** A file dialog is used for open/save operations initiated from the
1271 * Editing Changes in Emacs 24.3
1273 ** Search and Replace
1275 *** Non-regexp Isearch now performs "lax" space matching.
1276 Each sequence of spaces in the supplied search string may match any
1277 sequence of one or more whitespace characters, as specified by the
1278 variable `search-whitespace-regexp'. (This variable is also used by a
1279 similar existing feature for regexp Isearch.)
1281 *** New Isearch command `M-s SPC' toggles lax space matching.
1282 This applies to both ordinary and regexp Isearch.
1284 *** New option `replace-lax-whitespace'.
1285 If non-nil, `query-replace' uses flexible whitespace matching too.
1288 *** Global `M-s _' starts a symbol (identifier) incremental search,
1289 and `M-s _' in Isearch toggles symbol search mode.
1290 `M-s c' in Isearch toggles search case-sensitivity.
1292 ** Navigation commands
1294 *** New binding `M-g c' for `goto-char'.
1296 *** New binding `M-g TAB' for `move-to-column'.
1298 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1299 interactively with no prefix arg. Previously, it moved to column 1.
1301 ** New option `yank-handled-properties' allows processing of text
1302 properties on yanked text, in ways that are more general than just
1303 removing them (as is done by `yank-excluded-properties').
1305 ** New option `delete-trailing-lines' specifies whether
1306 M-x delete-trailing-whitespace should delete trailing lines at the end
1307 of the buffer. It defaults to t.
1309 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1311 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1312 `ucs-insert' is now an obsolete alias for `insert-char'.
1314 ** The `z' key no longer has a binding in most special modes.
1315 It used to be bound to `kill-this-buffer', but `z' is too easy to
1318 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1319 It copies the region-rectangle as the last rectangle kill.
1323 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1325 *** New option `register-separator' specifies the register containing
1326 the text to put between collected texts for use with
1327 M-x append-to-register and M-x prepend-to-register.
1330 * Changes in Specialized Modes and Packages in Emacs 24.3
1332 ** Common Lisp emulation (CL)
1334 *** CL's main entry is now (require 'cl-lib).
1335 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1336 i.e., all its definitions have the "cl-" prefix (and internal definitions
1337 use the "cl--" prefix).
1339 If `cl' provided a feature under the name `foo', then `cl-lib'
1340 provides it under the name `cl-foo' instead; with the exceptions of the
1341 few `cl' definitions that had to use `foo*' to avoid conflicts with
1342 pre-existing Elisp entities. These have been renamed to `cl-foo'
1343 rather than `cl-foo*'.
1345 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1346 provide the old, non-prefixed names. Some exceptions are listed below:
1348 *** `cl-flet' is not like `flet' (which is deprecated).
1349 Instead it obeys the behavior of Common-Lisp's `flet'.
1350 In particular, in cl-flet function definitions are lexically scoped,
1351 whereas in flet the scoping is dynamic.
1353 *** `cl-labels' is slightly different from `labels'.
1354 The difference is that it relies on the `lexical-binding' machinery
1355 (as opposed to the `lexical-let' machinery used previously) to capture
1356 definitions in closures, so such closures will only work if `lexical-binding'
1359 *** `cl-letf' is not exactly like `letf'.
1360 The only difference is in details that relate to some deprecated usage
1361 of `symbol-function' in place forms.
1363 *** `progv' was rewritten to use the `let' machinery.
1364 A side effect is that variables without corresponding values are bound
1365 to nil rather than being made unbound.
1367 *** The following methods of extending `setf' are obsolete
1368 (use features from gv.el instead):
1369 `define-modify-macro' (use `gv-letplace')
1370 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1371 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1372 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1376 *** Changes are now highlighted using the same color scheme as in
1377 modern VCSes. Deletions are displayed in red (new faces
1378 `diff-refine-removed' and `smerge-refined-removed', and new definition
1379 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1380 and `smerge-refined-added', and new definition of `diff-added').
1382 *** The variable `diff-use-changed-face' defines whether to use the
1383 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1384 changes in context diffs.
1386 *** The new command `diff-delete-trailing-whitespace' removes trailing
1387 whitespace introduced by a diff.
1389 ** Ediff now uses the same color scheme as Diff mode.
1393 A new version of python.el, which provides several new features, including:
1394 per-buffer shells, better indentation, Python 3 support, and improved
1395 shell-interaction compatible with iPython (and virtually any other
1398 *** Some user options have been replaced/renamed, including (old -> new):
1399 **** python-indent -> python-indent-offset
1400 **** python-guess-indent -> python-indent-guess-indent-offset
1401 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1402 **** python-use-skeletons -> python-skeleton-autoinsert
1404 *** Some user options have been removed, including:
1406 **** `python-indent-string-contents': Strings are never indented.
1408 **** `python-honour-comment-indentation':
1409 Comments are always considered as indentation markers.
1411 **** `python-continuation-offset': Indentation is automatically
1412 calculated in a pep8 compliant way depending on the context.
1414 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1415 Have no direct mapping as the shell interaction is completely different.
1417 **** `python-python-command', `python-jython-command':
1418 Replaced by `python-shell-interpreter'.
1420 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1421 `python-pdbtrack-minor-mode-string', `python-source-modes':
1424 *** Some commands have been replaced (old -> new):
1425 **** python-insert-class -> python-skeleton-class
1426 **** python-insert-def -> python-skeleton-def
1427 **** python-insert-for -> python-skeleton-for
1428 **** python-insert-if -> python-skeleton-if
1429 **** python-insert-try/except -> python-skeleton-try
1430 **** python-insert-try/finally -> python-skeleton-try
1431 **** python-insert-while -> python-skeleton-while
1432 **** python-find-function -> python-nav-jump-to-defun
1433 **** python-next-statement -> python-nav-forward-sentence
1434 **** python-previous-statement -> python-nav-backward-sentence
1435 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1436 **** python-end-of-defun-function -> python-nav-end-of-defun
1437 **** python-send-buffer -> python-shell-send-buffer
1438 **** python-send-defun -> python-shell-send-defun
1439 **** python-send-region -> python-shell-send-region
1440 **** python-send-region-and-go -> emulate with python-shell-send-region
1441 and python-shell-switch-to-shell
1442 **** python-send-string -> python-shell-send-string
1443 **** python-switch-to-python -> python-shell-switch-to-shell
1444 **** python-describe-symbol -> python-eldoc-at-point
1448 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1450 *** The D-Bus object manager interface is implemented.
1452 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1453 if their value does not fit into Emacs's integer range.
1455 *** The function `dbus-call-method' is now non-blocking.
1456 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1458 *** Signals can also be sent as unicast messages.
1460 *** The argument list of `dbus-register-signal' has been extended,
1461 according to the new match rule types of D-Bus.
1463 *** `dbus-init-bus' supports private connections.
1465 *** There is a new function `dbus-setenv'.
1467 ** `desktop-path' no longer includes the "." directory.
1468 Desktop files are now located in ~/.emacs.d by default.
1472 *** `dired-do-async-shell-command' executes each file sequentially
1473 if the command ends in `;' (when operating on multiple files).
1474 Otherwise, it executes the command on each file in parallel.
1476 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1477 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1480 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1481 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1482 mark/unmark/flag all files in the active region.
1484 *** The minibuffer default for `=' (`dired-diff') has changed.
1485 It is now the backup file for the file at point, if one exists.
1486 In Transient Mark mode the default is the file at the active mark.
1488 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1489 The global binding for `M-=', `count-words-region' is in effect.
1493 *** New module "notifications", which can send a notification when you
1494 receive a private message or your nickname is mentioned.
1496 *** ERC will look up server/channel names via auth-source and use any
1499 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1500 only applies to messages sent by lurkers.
1502 ** reStructuredText mode
1504 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1505 fontification, comment handling, and customization have all been revised
1508 *** Support for `imenu' and `which-function-mode'.
1510 *** The reStructuredText syntax is more closely covered.
1511 Sphinx support has been improved.
1513 *** `rst-insert-list' inserts new list or continues existing lists.
1515 *** A negative prefix argument always works for `rst-adjust'.
1517 *** The window configuration is reset after displaying a TOC.
1519 *** The constant `rst-version' describes the rst.el package version.
1523 *** Support for percent literals and recognition of regular expressions
1524 in method calls without parentheses with more methods, including Cucumber
1527 *** Improved syntax highlighting and indentation.
1529 *** New command `ruby-toggle-block', bound to `C-c {'.
1531 *** Some non-standard keybindings/commands have been removed:
1533 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1535 **** `ruby-mark-defun'; use `mark-defun'.
1537 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1538 appropriate settings for the variables `beginning-of-defun-function'
1539 and `end-of-defun-function'.
1541 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1542 `reindent-then-newline-and-indent' and `newline' have been removed.
1544 ** Shell Script mode
1546 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1548 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1550 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1554 *** The free software compiler GHDL is supported (and now the default).
1556 *** Support for the VHDL-AMS packages has been added/updated.
1558 *** Updated to the 2002 revision of the VHDL standard.
1560 *** Accepts \r and \f as whitespace.
1564 *** The faces used by Apropos are now directly customizable.
1565 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1566 see the `apropos' Custom group for details.
1568 *** The old options whose values specified faces to use have been removed
1569 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1573 *** This package has been rewritten to use Tabulated List mode.
1575 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1576 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1580 *** Algebraic simplification mode is now the default.
1581 To restrict to the limited simplifications given by the former
1582 default simplification mode, use `m I'.
1586 *** You can customize the header text that appears above each calendar month.
1587 See the variable `calendar-month-header'.
1589 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1591 *** The calendars produced by cal-html include holidays.
1592 Customize `cal-html-holidays' to change this.
1596 *** The major modes from the parser generators "Bovine" and "Wisent"
1597 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1598 are in `auto-mode-alist', and the corresponding manuals are included.
1602 **** Menu support for the "Configuration" feature. This allows users to
1603 choose the active configuration (such as debug or install) from the menu.
1605 **** New command `ede-set' to interactively set project-local variables.
1607 **** Support for compiling, debugging, and running in "generic" projects.
1609 **** Autoconf editing support for M4 macros with complex arguments.
1611 **** Compilation support for the "linux" project type.
1613 **** "simple" projects have been removed; use "generic" projects instead.
1617 **** Support for parsing #include statements inside a namespace in C/C++.
1619 **** Improved support for 'extern "C"' declarations in C/C++.
1621 **** The ability to ignore more common special C/C++ preprocessor symbols,
1622 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1623 If available, include cdefs.h as an additional source of preprocessor symbols.
1625 **** Improved C/C++ function pointer parsing.
1627 **** In Python, support for converting imports to include file names.
1629 **** Ability to dynamically determine the Python load path.
1631 **** Support for the Python 'WITH' and 'AT' keywords.
1633 **** Improved tooltip completion.
1637 **** The SRecode manual is now included.
1639 **** Tag generation supports constructor/destructor settings and system
1640 include differentiation.
1642 **** Addition of 'Framework' support: Frameworks are specified when a
1643 particular kind of library (such as Android) is needed in a common language
1646 **** Support for nested templates and let variables override based on priority.
1648 **** Support for merging tables from multiple related modes, such as
1649 default -> c++ -> arduino.
1651 ** Compile has a new option `compilation-always-kill'.
1655 *** `custom-reset-button-menu' now defaults to t.
1657 *** Non-option variables are never matched in `customize-apropos' and
1658 `customize-apropos-options' (i.e., the prefix argument does nothing for
1659 these commands now).
1663 *** The variables `term-default-fg-color' and `term-default-bg-color'
1664 are now deprecated in favor of the customizable face `term'.
1666 *** You can customize how to display ANSI terminal colors and styles
1667 by customizing the corresponding `term-color-<COLOR>',
1668 `term-color-underline' and `term-color-bold' faces.
1672 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1674 *** Remote processes are now also supported on remote MS-Windows hosts.
1678 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1679 Previously, this slot stored semicolon-separated attribute-value pairs
1680 appended to some imap URLs, but this is not compatible with RFC 3986.
1681 So now the `filename' slot stores the entire path and query components,
1682 and the `attributes' slot is always nil.
1684 *** New function `url-encode-url' for encoding a URI string.
1685 The `url-retrieve' function now uses this to encode its URL argument,
1686 in case that is not properly encoded.
1688 *** New command `url-cookie-list' displays all the current cookies, and
1689 allows deleting selected cookies.
1691 ** notifications.el supports now version 1.2 of the Notifications API.
1692 The function `notifications-get-capabilities' returns the supported
1695 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1696 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1697 `flymake-warning-bitmap'.
1699 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1700 specifying URL types that should be converted to remote file names at
1701 the FFAP prompt. The default is now '("ftp").
1703 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1704 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1706 ** New option `mouse-avoidance-banish-position' specifies where the
1707 `banish' mouse avoidance setting moves the mouse.
1709 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1710 closing brackets to be aligned with the line of the opening bracket.
1712 ** In Proced mode, new command `proced-renice' renices marked processes.
1714 ** New option `async-shell-command-buffer' specifies the buffer to use
1715 for a new asynchronous `shell-command' when the default output buffer
1716 `*Async Shell Command*' is already in use.
1718 ** SQL mode has a new option `sql-db2-escape-newlines'.
1719 If non-nil, newlines sent to the command interpreter will be escaped
1720 by a backslash. The default does not escape the newlines and assumes
1721 that the sql statement will be terminated by a semicolon.
1723 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1724 (and modes that derive from it), sorts the column at point, or the Nth
1725 column if a numeric prefix argument is given.
1727 ** `which-func-modes' now defaults to t, so Which Function mode, when
1728 enabled, applies to all applicable major modes.
1730 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1733 ** Follow mode no longer works by using advice.
1734 The option `follow-intercept-processes' has been removed.
1736 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1738 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1739 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1740 *** semantic-change-hooks -> semantic-change-functions
1741 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1742 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1743 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1744 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1745 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1746 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1747 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1748 *** rcirc-activity-hooks -> rcirc-activity-functions
1749 *** rcirc-print-hooks -> rcirc-print-functions
1750 *** dbus-event-error-hooks -> dbus-event-error-functions
1751 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1752 *** checkdoc-style-hooks -> checkdoc-style-functions
1753 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1754 *** archive-extract-hooks -> archive-extract-hook
1755 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1756 *** hfy-post-html-hooks -> hfy-post-html-hook
1757 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1758 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1759 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1760 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1762 ** Obsolete packages
1765 In most cases, assoc+member+push+delq work just as well.
1766 And in any case it's just a terrible package: ugly semantics, terrible
1767 inefficiency, and not namespace-clean.
1776 * Incompatible Lisp Changes in Emacs 24.3
1778 ** Docstrings starting with `*' no longer indicate user options.
1779 Only variables defined using `defcustom' are considered user options.
1780 The function `user-variable-p' is now an obsolete alias for
1781 `custom-variable-p'.
1783 ** The return values of `defalias', `defun' and `defmacro' have changed,
1784 and are now undefined. For backwards compatibility, `defun' and
1785 `defmacro' currently return the name of the newly defined
1786 function/macro, but this should not be relied upon.
1788 ** `random' by default now returns a different random sequence in
1789 every Emacs run. Use `(random S)', where S is a string, to set the
1790 random seed to a value based on S, in order to get a repeatable
1791 sequence in later calls.
1793 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1794 that substring is inserted literally even if the LITERAL arg is
1795 non-nil, instead of causing an error to be signaled.
1797 ** `select-window' now always makes the window's buffer current.
1798 It does so even if the window was selected before.
1800 ** The function `x-select-font' can return a font spec, instead of a
1801 font name as a string. Whether it returns a font spec or a font name
1802 depends on the graphical library.
1804 ** `face-spec-set' no longer sets frame-specific attributes when the
1805 third argument is a frame (that usage was obsolete since Emacs 22.2).
1807 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1809 ** The CL package's `get-setf-method' function no longer exists.
1810 Generalized variables are now part of core Emacs Lisp, and implemented
1811 differently to the way cl.el used to do it. It is not possible to
1812 define a compatible replacement for `get-setf-method'. See the file
1813 gv.el for internal details of the new implementation.
1815 ** The arguments of `dbus-register-signal' are no longer just strings,
1816 but keywords or keyword-string pairs. The old argument list will
1817 still be supported for Emacs 24.x.
1819 ** Miscellaneous name changes
1820 Some Lisp symbols have been renamed to correct their spelling,
1821 or to be more consistent with standard Emacs terminology.
1823 *** Renamed functions
1824 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1825 **** inactivate-input-method -> deactivate-input-method
1826 **** quail-inactivate -> quail-deactivate
1827 **** robin-inactivate -> robin-deactivate
1828 **** viper-inactivate-input-method -> viper-deactivate-input-method
1829 **** viper-inactivate-input-method-action ->
1830 viper-deactivate-input-method-action
1831 **** ucs-input-inactivate -> ucs-input-deactivate
1834 The old hooks are still supported for backward compatibility, but they
1835 are deprecated and will be removed eventually.
1836 **** input-method-inactivate-hook -> input-method-deactivate-hook
1837 **** robin-inactivate-hook -> robin-deactivate-hook
1838 **** quail-inactivate-hook -> quail-deactivate-hook
1840 *** Renamed variables
1841 **** follow-deactive-menu -> follow-inactive-menu
1842 **** inactivate-current-input-method-function ->
1843 deactivate-current-input-method-function
1845 ** Some obsolete functions, variables, and faces have been removed:
1846 *** `last-input-char', `last-command-char', `unread-command-char'
1847 *** `facemenu-unlisted-faces'
1848 *** `rmail-decode-mime-charset'
1849 *** `iswitchb-read-buffer'
1850 *** `sc-version', `sc-submit-bug-report'
1851 *** `set-char-table-default'
1852 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1853 *** `compile-internal'
1855 *** `mode-line-inverse-video'
1856 *** `follow-mode-off-hook'
1857 *** `cvs-commit-buffer-require-final-newline'
1858 (use `log-edit-require-final-newline' instead)
1859 *** `cvs-changelog-full-paragraphs'
1860 (use `log-edit-changelog-full-paragraphs' instead)
1861 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1862 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1863 *** `vc-master-templates' (use `vc-handled-backends' instead)
1864 *** `vc-checkout-carefully'
1867 * Lisp Changes in Emacs 24.3
1869 ** CL-style generalized variables are now in core Elisp.
1870 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1871 You can define your own generalized variables using `gv-define-simple-setter',
1872 `gv-define-setter', etc.
1874 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1875 This can significantly speed up execution of non-byte-compiled code,
1876 but can also bump into previously unnoticed cyclic dependencies.
1877 These are generally harmless: they will simply cause the macro calls
1878 to be left for later expansion (as before), but will result in a
1879 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1880 You may wish to restructure your code so this does not happen.
1882 ** New sampling-based Elisp profiler.
1883 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1884 When finished, use M-x profiler-stop. The sampling rate can be based on
1885 CPU time or memory allocations.
1887 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1888 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1890 ** New macros `setq-local' and `defvar-local'.
1892 ** Face underlining can now use a wave.
1894 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1895 of `read-regexp' accepts a string ending with a colon and space, and its
1896 second argument DEFAULTS can be a list of strings accessible via `M-n'
1897 in the minibuffer ahead of other hard-coded useful regexp-related values.
1898 More commands use `read-regexp' now to read their regexp arguments.
1902 *** New function `completion-table-with-quoting' to handle completion
1903 in the presence of quoting, such as file completion in shell buffers.
1905 *** New function `completion-table-subvert' to use an existing completion
1906 table, but with a different prefix.
1910 *** New error type and new function `user-error'.
1911 These do not trigger the debugger.
1913 *** New option `debugger-bury-or-kill', saying what to do with the
1914 debugger buffer when exiting debug.
1916 *** Set `debug-on-message' to enter the debugger when a certain
1917 message is displayed in the echo area. This can be useful when trying
1918 to work out which code is doing something.
1920 *** New var `inhibit-debugger', automatically set to prevent accidental
1921 recursive invocations.
1925 *** New command `fit-frame-to-buffer' adjusts the frame height to
1928 *** The command `fit-window-to-buffer' can adjust the frame height
1929 if the new option `fit-frame-to-buffer' is non-nil.
1931 *** New macro `with-temp-buffer-window', similar to
1932 `with-output-to-temp-buffer'.
1934 *** `temp-buffer-resize-mode' no longer resizes windows that have been
1937 *** New option `switch-to-buffer-preserve-window-point' to restore a
1938 window's point when switching buffers.
1940 *** New display action function `display-buffer-no-window' to not
1941 display the buffer in a window.
1943 *** New display action alist entry `allow-no-window' to indicate the
1944 caller of `display-buffer' is ready to handle the case of not
1945 displaying the buffer in a window.
1947 *** New display action alist entries `window-height' and `window-width'
1948 specify the size of new windows created by `display-buffer'.
1950 *** New display action alist entry `pop-up-frame-parameters', if
1951 non-nil, specifies frame parameters to give any newly-created frame.
1953 *** New display action alist entry `inhibit-switch-frame', if non-nil,
1954 tells display action functions to avoid changing which frame is
1957 *** New display action alist entry `previous-window', if non-nil,
1958 specifies window to reuse in `display-buffer-in-previous-window'.
1960 *** New display action functions `display-buffer-below-selected',
1961 and `display-buffer-in-previous-window'.
1963 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1964 now accept a third argument to avoid choosing the selected window.
1966 *** Additional values recognized for option `window-combination-limit'.
1968 *** The following variables are obsolete, as they can be replaced by
1969 appropriate entries in the `display-buffer-alist' function introduced
1971 **** `dired-shrink-to-fit'
1972 **** `display-buffer-reuse-frames'
1973 **** `display-buffer-function'
1974 **** `special-display-buffer-names'
1975 **** `special-display-frame-alist'
1976 **** `special-display-function'
1977 **** `special-display-regexps'
1981 *** `current-time-string' no longer requires that its argument's year
1982 must be in the range 1000..9999. It now works with any year supported
1983 by the underlying C implementation.
1985 *** `current-time' now returns extended-format time stamps
1986 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1987 PSEC is typically a multiple of 1000 on current machines. Other
1988 functions that use this format, such as `file-attributes' and
1989 `format-time-string', have been changed accordingly. Old-format time
1990 stamps are still accepted.
1992 *** The format of timers in `timer-list' and `timer-idle-list' is now
1993 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1994 The PSECS slot is new, and uses picosecond resolution. It can be
1995 accessed via the new `timer--psecs' accessor.
1997 *** Last-modified time stamps in undo lists now are of the form
1998 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2002 *** Improved security when handling persistent objects:
2004 **** `eieio-persistent-read' now features optional arguments for specifying
2005 the class to load, as well as a flag stating whether subclasses are allowed;
2006 if provided, other classes will be rejected by the reader. For
2007 compatibility with existing code, if the class is omitted only a
2010 **** New specialized reader for pulling in classes and signaling errors
2011 without evaluation of suspicious code.
2013 **** All slots that contain objects must have a :type. Slots with lists
2014 of objects must use a new type predicate for a list of an object type.
2016 *** Support for `find-function' and similar utilities, through the addition
2017 of filename support to generated symbols.
2019 ** Floating point functions now always return special values like NaN,
2020 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2021 Previously, they returned NaNs on some platforms but signaled errors
2022 on others. The affected functions are acos, asin, tan, exp, expt,
2023 log, log10, sqrt, and mod.
2025 ** New fringe bitmap `exclamation-mark'.
2027 ** Miscellaneous changes to special forms and macros
2029 *** `defun' and `defmacro' are now macros rather than special forms.
2031 *** `kbd' is now a function rather than a macro.
2033 ** Miscellaneous new functions
2035 *** `set-temporary-overlay-map' sets up a temporary keymap that
2036 takes precedence over most other maps for a short while (normally one key).
2038 *** `autoloadp' tests if its argument is an autoloaded object.
2040 *** `autoload-do-load' performs the autoloading operation.
2042 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2044 *** `file-name-base' returns a file name sans directory and extension.
2046 *** `function-get' fetches a function property, following aliases.
2048 *** `posnp' tests if an object is a `posn'.
2050 *** `system-users' returns the user names on the system.
2052 *** `system-groups' returns the group names on the system.
2054 *** `tty-top-frame' returns the topmost frame of a text terminal.
2056 ** The following functions and variables are obsolete:
2057 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2058 *** `buffer-has-markers-at'
2059 *** `macro-declaration-function' (use `macro-declarations-alist')
2060 *** `window-system-version' (provides no useful information)
2061 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2062 *** `query-replace-interactive'
2063 *** `font-list-limit' (has had no effect since Emacs < 23)
2066 * Changes in Emacs 24.3 on Non-Free Operating Systems
2068 ** Cygwin builds can use the native MS Windows user interface.
2069 Pass `--with-w32' to configure. The default remains the X11 interface.
2071 ** Two new functions are available in Cygwin builds:
2072 `cygwin-convert-file-name-from-windows' and
2073 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2074 code to access the Cygwin file-name mapping machinery to convert
2075 between Cygwin and Windows-native file and directory names.
2077 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2078 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2079 `mouse-autoselect-window'.
2081 ** On MS Windows Vista and later Emacs now supports symbolic links.
2083 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2084 support for libxml2, even if its presence is detected.
2086 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2088 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2089 directories to the search path. You must add them yourself if you want them.
2092 * Changes in Emacs 24.2
2094 ** This is mainly a bug-fix release.
2097 * Installation Changes in Emacs 24.1
2099 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2100 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2101 also depend on Gtk+. You can disable them with --without-rsvg and
2104 ** Emacs can be compiled with GnuTLS support.
2105 This happens by default if a suitably recent version of the library is
2106 found at build time. To prevent this, use the configure option
2107 `--without-gnutls'. See below for GnuTLS features.
2109 ** Emacs can be compiled with SELinux support.
2110 This happens by default if a suitably recent version of the library is
2111 found at build time. To prevent this, use the configure option
2112 `--without-selinux'. See below for SELinux features.
2114 ** Emacs can be compiled with ImageMagick support.
2115 This happens by default if a suitably recent version of the library is
2116 found at build time. To prevent this, use the configure option
2117 `--without-imagemagick'. See below for ImageMagick features.
2118 This feature is not available for the Nextstep or MS ports.
2120 ** Emacs can be compiled with libxml2 support.
2121 This happens by default if a suitably recent version of the library is
2122 found at build time. To prevent this, use the configure option
2123 `--without-xml2'. See below for libxml2 features.
2125 ** By default, the installed Info and man pages are compressed.
2126 You can disable this by configuring --without-compress-info.
2128 ** New configure option --with-wide-int.
2129 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2130 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2133 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2134 These provide no new functionality, they just remove the need to edit
2135 lib-src/Makefile by hand in order to use the associated features.
2137 ** New configure option --enable-use-lisp-union-type.
2138 This is only useful for Emacs developers to debug certain types of bugs.
2139 This is not a new feature; only the configure flag is new.
2141 ** The standalone programs digest-doc and sorted-doc are removed.
2142 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2144 ** The standalone program `fakemail' is removed.
2145 If you need it, feedmail.el provides a superset of the functionality.
2148 * Startup Changes in Emacs 24.1
2150 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2151 command line arguments, and the EMACS_UNIBYTE environment variable, no
2152 longer have any effect. (They were declared obsolete in Emacs 23.)
2154 ** New command line option `--no-site-lisp' removes site-lisp directories
2155 from load-path. -Q now implies this. This option does not affect the
2156 EMACSLOADPATH environment variable (and hence has no effect for
2160 * Changes in Emacs 24.1
2164 *** Many packages now use the `completion-at-point' command,
2165 rather than implementing separate completion commands.
2167 *** `completion-at-point' now handles tags and semantic completion.
2169 *** Completion in a non-minibuffer now tries to detect the end of completion
2170 and pops down the *Completions* buffer accordingly.
2172 *** New option `completion-cycle-threshold' allows completion cycling.
2174 *** New option `completion-category-overrides' for overriding the
2175 default completion style in certain circumstances.
2177 *** New completion style `substring'.
2179 *** Completion of buffer names uses `substring' completion by default.
2181 *** The option `widget-complete-field' has been removed.
2185 *** The first time you try sending mail, Emacs asks for a mail method.
2186 This is implemented by a new default for `send-mail-function', which
2187 is `sendmail-query-once'. This offers to use the smtpmail package, or
2188 to use the old defaults relying on external mail facilities
2189 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2190 `mailclient-send-it' on Windows).
2192 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2193 transfers the report to your desktop's preferred mail client, if there
2194 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2197 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2198 and Mail mode changes
2200 ** Emacs server and client changes
2202 *** New option `server-port' specifies the port for TCP Emacs servers.
2204 *** New emacsclient argument -q/--quiet suppresses some status messages.
2206 *** New emacsclient argument --frame-parameters specifies the frame
2207 parameters of any newly-created graphical frame.
2209 *** If emacsclient shuts down due to Emacs signaling an error,
2210 its exit status is 1.
2212 *** New emacsclient argument --parent-id ID.
2213 This opens a client frame in parent X window ID, via XEmbed, similar
2214 to the --parent-id argument to Emacs.
2216 ** Internationalization changes
2218 *** Emacs now supports display and editing of bidirectional text.
2219 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2220 displayed in the correct visual order as expected by users of those
2221 scripts. The display reordering is a "full bidirectionality" class
2222 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2223 with no RTL text should look exactly the same as before.
2225 **** New buffer-local variable `bidi-display-reordering'.
2226 To disable display reordering in a buffer, change this to nil.
2228 **** New buffer-local variable `bidi-paragraph-direction'.
2229 If nil (the default), Emacs determines the base direction of each
2230 paragraph from its text, as specified by the UBA. Setting the value
2231 to `right-to-left' or `left-to-right' forces a base direction on each
2234 Paragraphs with right-to-left base direction are displayed starting at
2235 the right window edge.
2237 *** Enhanced support for characters with no glyphs in available fonts,
2238 or, on text terminals, characters that cannot be encoded by the
2239 terminal coding system. The new option `glyphless-char-display-control'
2240 specifies how to display them: as a hexadecimal code in a box, a thin
2241 1-pixel space, an empty box, etc.
2243 *** New input methods for Farsi and Bulgarian
2244 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2246 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2247 (U+2010 and U+2011).
2249 *** New Hebrew translation of the Emacs Tutorial.
2250 Type `C-u C-h t' to choose it in case your language setup doesn't
2251 automatically select it.
2253 ** An Emacs Lisp package manager is now included.
2254 This is a convenient way to download and install additional packages,
2255 from a package repository at http://elpa.gnu.org.
2257 *** M-x list-packages shows a list of packages, which can be
2258 selected for installation.
2260 *** New command `describe-package', bound to `C-h P'.
2262 *** By default, all installed packages are loaded automatically when
2263 Emacs starts up. To disable this, set `package-enable-at-startup' to
2264 nil. To specify the packages to load, customize `package-load-list'.
2266 ** Custom theme changes
2268 *** New command `M-x customize-themes', which provides a convenient
2269 interface for enabling and disabling Custom themes.
2271 *** New option `custom-theme-load-path' is the load path for themes.
2272 Emacs no longer looks for Custom themes in `load-path'. The default
2273 value of `custom-theme-load-path' says to look for themes in
2274 `custom-theme-directory', followed by a subdirectory of
2275 `data-directory' named "themes/", which contains a small selection of
2276 built-in Custom themes.
2278 *** New option `custom-safe-themes' records known-safe theme files.
2279 If a theme is not in this list, Emacs queries before loading it, and
2280 offers to save the theme to `custom-safe-themes' automatically. By
2281 default, all themes included in Emacs are treated as safe.
2283 ** Improved GTK integration
2285 *** GTK scroll-bars are now placed on the right by default.
2286 The function `set-scroll-bar-mode' can change this.
2288 *** GTK tool bars can have just text, just images or images and text.
2289 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2290 the default is taken from desktop settings.
2292 *** GTK tool bars can be placed on any edge of the frame.
2293 The frame-parameter tool-bar-position controls this. It takes the
2294 values top, left, right or bottom. The Options => Show/Hide menu has
2297 *** The default colors for selected text (the `region' face) are taken
2298 from the GTK theme when Emacs is built with GTK.
2300 *** Emacs uses GTK tooltips by default if built with GTK.
2301 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2303 ** Graphical interface changes
2305 *** On graphical displays, the mode-line no longer ends in dashes.
2306 Also, the first dash (which does not indicate anything) is just
2307 displayed as a space.
2309 *** `menu-bar-select-buffer-function' lets you choose another operation
2310 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2312 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2313 built with Xft. These fonts can be set via X resources, for example:
2314 Emacs.pane.menubar.font: Courier-12
2318 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2319 or if it receives a SIGINT signal in batch mode.
2321 *** `kill-emacs-hook' is now also run in batch mode.
2322 Third-party code which adds to `kill-emacs-hook' should check if they
2323 do the right thing in batch mode.
2325 ** Scrolling changes
2327 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2328 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2329 of buffer at first key-press (instead they move to top/bottom of buffer)
2330 when `scroll-error-top-bottom' is non-nil.
2332 *** New option `scroll-error-top-bottom' (see above).
2334 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2335 scroll a line instead of full screen.
2337 *** New property `scroll-command' should be set on a command's symbol to
2338 define it as a scroll command affected by `scroll-preserve-screen-position'.
2340 *** If you customize `scroll-conservatively' to a value greater than 100,
2341 Emacs will never recenter point in the window when it scrolls due to
2342 cursor motion commands or commands that move point (e.f., `M-g M-g').
2343 Previously, you needed to use `most-positive-fixnum' as the value of
2344 `scroll-conservatively' to achieve the same effect.
2346 *** "Aggressive" scrolling now honors the scroll margins.
2347 If you customize `scroll-up-aggressively' or
2348 `scroll-down-aggressively' and move point off the window, Emacs now
2349 scrolls the window so as to avoid positioning point inside the scroll
2352 ** Basic SELinux support has been added.
2353 This requires Emacs to be linked with libselinux at build time.
2355 *** Emacs preserves the SELinux file context when backing up.
2356 Also, the function `copy-file' has an extra optional argument for
2357 preserving SELinux context, and the return value of `backup-buffer'
2358 now includes the SELinux context.
2360 *** New functions `file-selinux-context' and `set-file-selinux-context'
2361 get and set the SELinux context of a file.
2365 *** `delete-by-moving-to-trash' now only affects commands that specify
2366 trashing. This avoids inadvertently trashing temporary files.
2368 *** Calling `delete-file' or `delete-directory' with a prefix argument
2369 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2371 ** File- and directory-local variable changes
2373 *** You can stop directory local vars from applying to subdirectories.
2374 Add an element (subdirs . nil) to the alist portion of any variables
2375 settings to indicate that the section should not apply to
2378 *** Directory local variables can apply to some file-less buffers.
2379 Affected modes include dired, vc-dir, and log-edit. For example,
2380 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2381 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2382 `hack-dir-local-variables-non-file-buffer' to support this.
2384 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2385 Instead, use "eval: (minor-mode 1)".
2387 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2388 to `inhibit-local-variables-regexps'. As the name suggests, it now
2389 applies to ALL file local variables, not just -*- lines. The
2390 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2395 *** The `quit-window' command now restores the last buffer displayed
2396 in the quitted window.
2398 *** Resizing an Emacs frame now preserves proportional window sizes,
2399 modulo restrictions like window minimum sizes and fixed-size windows.
2401 *** The behavior of `display-buffer' is now customizable in detail.
2403 **** New option `display-buffer-base-action' specifies a list of
2404 user-determined display "actions" (functions and optional arguments
2405 for choosing the displaying window).
2407 This takes precedence over the default display action, which is
2408 specified by `display-buffer-fallback-action'.
2410 **** New option `display-buffer-alist' maps buffer name regexps to
2411 display actions, taking precedence over `display-buffer-base-action'.
2413 *** New option `window-combination-limit'.
2414 The new option `window-combination-limit' allows to return the space
2415 obtained for resizing or creating a window more reliably to the window
2416 from which such space was obtained.
2418 *** New option `window-combination-resize'.
2419 The new option `window-combination-resize' allows to split a window that
2420 otherwise cannot be split because it's too small by stealing space from
2421 other windows in the same combination. Subsequent resizing or deletion
2422 of the window will resize all windows in the same combination as well.
2424 *** New option `frame-auto-hide-function' lets you choose between
2425 iconifying or deleting a frame when burying a buffer in a dedicated
2426 frame, or quitting a window showing a buffer in a frame of its own.
2428 *** New commands `maximize-window' and `minimize-window'.
2429 These maximize and minimize the size of a window within its frame.
2431 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2432 These functions allow to navigate through the live buffers that have
2433 been shown in a specific window.
2435 ** Minibuffer changes
2437 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2438 This is handy for minibuffer-only frames, and is also used for the feature
2439 where mouse-1 pops up *Messages*"', which can now easily be changed.
2441 *** Minibuffers set `truncate-lines' to nil.
2442 If you want to change the value to something else, you could use
2443 for example `minibuffer-setup-hook'.
2445 ** `auto-mode-case-fold' is now enabled by default.
2447 ** `backup-by-copying-when-mismatch' now defaults to t.
2449 ** New basic faces `error', `warning', `success'.
2450 These are used to highlight text indicating failure, caution or
2451 successful operation.
2453 ** New option `list-colors-sort' defines the color sort order
2454 for `list-colors-display'.
2456 ** The variable `focus-follows-mouse' now always defaults to nil.
2459 * Editing Changes in Emacs 24.1
2463 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2464 `isearch-yank-line'.
2466 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2467 `isearch-yank-kill'.
2469 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2471 ** New commands `count-words-region' and `count-words'.
2473 *** M-= is bound to `count-words-region', not `count-lines-region'.
2474 The `count-words-region' command, when called interactively, reports
2475 the number of lines, words, and characters in the region. It is a
2476 superset of the old `count-lines-region', which is now an obsolete
2479 ** The command `just-one-space' (M-SPC), if given a negative argument,
2480 also deletes newlines around point.
2484 *** New option `delete-active-region'.
2485 If non-nil, [delete] and DEL delete the region if it is active and no
2486 prefix argument is given. If set to `kill', those commands kill
2489 *** New command `delete-forward-char', bound to [delete].
2490 This is meant for interactive use, and obeys `delete-active-region'.
2491 The command `delete-char' does not obey `delete-active-region'.
2493 *** `delete-backward-char' is now a Lisp function.
2494 Apart from obeying `delete-active-region', its behavior is unchanged.
2495 However, the byte compiler now warns if it is called from Lisp; Lisp
2496 callers should use delete-char with a negative argument instead.
2498 *** The option `mouse-region-delete-keys' has been deleted.
2500 ** Selection changes.
2502 The default handling of clipboard and primary selections has been
2503 changed to conform with modern X applications. In short, most
2504 commands for killing and yanking text now use the clipboard, while
2505 mouse commands use the primary selection.
2507 In the following, we provide a list of these changes, followed by a
2508 list of steps to get the old behavior back if you prefer that.
2510 *** `select-active-regions' now defaults to t.
2511 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2512 the kill ring. The selected text is put in the primary selection, if
2513 the system possesses a separate primary selection facility (e.g. X).
2515 **** `select-active-regions' also accepts a new value, `only'.
2516 This means to only set the primary selection for temporarily active
2517 regions (usually made by mouse-dragging or shift-selection);
2518 "ordinary" active regions, such as those made with C-SPC followed by
2519 point motion, do not alter the primary selection.
2521 **** `mouse-drag-copy-region' now defaults to nil.
2523 *** mouse-2 is now bound to `mouse-yank-primary'.
2524 This pastes from the primary selection, ignoring the kill-ring.
2525 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2527 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2529 *** `x-select-enable-primary' now defaults to nil.
2530 Thus, commands that kill text or copy it to the kill-ring (such as
2531 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2533 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2534 exactly equivalent to M-w, C-w, and C-y respectively.
2536 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2537 non-nil by default, as Windows does not support the primary selection
2538 between applications.
2540 *** To return to the previous behavior, do the following:
2542 **** Change `select-active-regions' to nil.
2543 **** Change `mouse-drag-copy-region' to t.
2544 **** Change `x-select-enable-primary' to t (on X only).
2545 **** Change `x-select-enable-clipboard' to nil.
2546 **** Bind `mouse-yank-at-click' to mouse-2.
2548 *** Support for X cut buffers has been removed.
2550 *** X clipboard managers are now supported.
2551 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2553 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2554 in the current rectangle. With a prefix argument, this prompts for a
2555 number to count from and for a format string.
2557 ** `redisplay-dont-pause' now defaults to t.
2558 This makes Emacs feel more responsive to editing commands that arrive
2559 at high rate, e.g. if you lean on some key, because stopping redisplay
2560 in the middle (when this variable is nil) forces more expensive
2561 updates later on, and Emacs appears to be unable to keep up.
2563 ** The behavior of <TAB> for active regions in Text mode has changed.
2564 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2565 when the region is active causes Emacs to indent all the lines in the
2566 region, aligning them with the line previous to the first line in the
2567 region (or with the left margin if there is no previous line).
2569 ** When `occur' is called with a prefix argument, matching strings are
2570 collected into the `*Occur*' buffer without line numbers. If there
2571 are parenthesized subexpressions in the specified regexp, `occur'
2572 reads replacement text that may contain \\& and \\N whose convention
2573 follows `replace-match'.
2576 * Changes in Specialized Modes and Packages in Emacs 24.1
2578 ** Archive Mode has basic support for browsing and updating 7z archives.
2582 *** BibTeX mode now supports biblatex.
2583 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2584 `bibtex-entry-field-alist' is now an obsolete alias for
2585 `bibtex-BibTeX-entry-alist'.
2587 *** New command `bibtex-search-entries', bound to C-c C-a.
2589 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2591 *** New variable `bibtex-search-entry-globally'.
2595 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2597 *** The default browser used by the package is now the "xdg-open" program,
2598 on platforms that support it. This calls your desktop's preferred browser.
2602 *** Support for musical notes.
2604 *** Support for logarithmic units.
2606 *** No longer uses the tex prefix for TeX specific unit names when
2607 using TeX or LaTeX mode.
2609 *** New option to highlight selections using faces.
2611 *** `calc-histogram' has the option of using a vector to determine the bins.
2613 *** New "O" option prefix.
2615 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2617 ** Calendar, Diary, and Appt
2619 *** Diary entries can contain non-printing "comments".
2620 See the variable `diary-comment-start'.
2622 *** Appointments can specify their individual warning times.
2623 See the variable `appt-warning-time-regexp'.
2625 *** The function specified by `appt-disp-window-function' may be passed
2626 lists of arguments if multiple appointments are due at similar times.
2627 If you are using a custom function for this, you should update it.
2629 *** New function `diary-hebrew-birthday'.
2631 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2632 may no longer be nil, but must all be strings.
2634 *** The obsolete (since Emacs 22.1) method of enabling the appt
2635 package by adding `appt-make-list' to `diary-hook' has been removed.
2636 Use `appt-activate' instead.
2638 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2639 appt-issue-message (use the function appt-activate)
2640 appt-visible/appt-msg-window (use the variable appt-display-format)
2642 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2643 view-diary-entries, list-diary-entries, show-all-diary-entries
2647 *** New feature to "guess" the style in an existing buffer.
2648 The main entry point is M-x c-guess.
2650 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2652 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2653 Thus C-M-a will, by default, go to the beginning of the immediate function,
2656 *** "Macros with semicolons" can be registered for correct indentation.
2657 Where such a macro ends a line (no semicolon) the next statement is no longer
2658 parsed as a statement continuation.
2660 ** Comint and modes derived from it use the standard completion code.
2664 *** Compilation mode can be used without Font Lock mode.
2665 `compilation-parse-errors-function' is now obsolete.
2667 *** New variable `compilation-filter-start', which is bound while
2668 `compilation-filter-hook' runs. It records the start position of the
2669 text inserted by `compilation-filter'.
2671 *** `compilation-error-screen-columns' and `compilation-first-column'
2672 are obeyed in the editing buffer. So programming language modes can
2673 set them, whereas previously only the value in the *Compilation*
2678 *** Customize buffers now contain a search field.
2679 The search is performed using `customize-apropos'.
2680 To turn off the search field, set `custom-search-field' to nil.
2682 *** Options in customize group buffers start out hidden if not customized.
2683 Use the arrow to the left of the option name to toggle visibility.
2685 *** custom-buffer-sort-alphabetically now defaults to t.
2687 *** The color widget now has a "Choose" button, which allows you to
2688 choose a color via `list-colors-display'.
2692 *** It is now possible to access buses other than the default system
2695 *** The `dbus-register-method' and `dbus-register-property' functions
2696 optionally do not register names.
2698 *** The new function `dbus-register-service' registers a known service
2699 name on a D-Bus without also registering a property or a method.
2703 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2704 if called with a prefix argument, read a file name from the minibuffer
2705 instead of using the current buffer.
2707 *** The "dired local variables" feature of Dired-x is obsolete.
2708 The standard directory local variables feature replaces it.
2712 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2713 controlling attempts to autojoin a channel.
2715 *** New variable `erc-coding-system-precedence': If we use `undecided'
2716 as the server coding system, this variable will then be consulted.
2717 The default is to decode strings that can be decoded as utf-8 as
2718 utf-8, and do the normal `undecided' decoding for the rest.
2722 *** The default value of `eshell-directory-name' has changed
2723 to be an "eshell" directory in `user-emacs-directory'.
2724 The old "~/.eshell/" directory is still used if it exists, though.
2728 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2729 It now supports multithread non-stop debugging and simultaneous
2730 debugging of several threads.
2734 *** RET (`image-toggle-animation') toggles animation, if applicable.
2735 Animation plays once, unless the option `image-animate-loop' is non-nil.
2739 *** New command M-x info-display-manual displays a named Info manual.
2740 If that manual is already visited in some Info buffer, it displays
2741 that buffer. (This is handy if you have many manuals in many *info*
2742 buffers, and don't remember the name of the buffer visiting the manual
2743 you want to consult.) Otherwise, it loads and displays the manual.
2745 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2746 This is for compatibility with the stand-alone Info reader program,
2747 and also because `Info-edit' is a rarely used command that is disabled
2750 ** Mail mode changes (not Message mode)
2752 *** New command M-x mail-add-attachment for adding MIME attachments
2754 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2755 (Its name is misleading, since it has nothing to do with MIME
2756 attachments.) The old name is now an obsolete alias to the new name.
2758 ** MH-E has been updated to MH-E version 8.3.1.
2759 See MH-E-NEWS for details.
2761 ** Modula-2 mode provides auto-indentation.
2763 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2765 ** nXML mode no longer binds C-RET to `nxml-complete'.
2766 Completion is now performed via `completion-at-point', bound to C-M-i
2767 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2768 default), this performs tag completion.
2770 ** Org mode has been updated to version 7.8.09.
2771 See ORG-NEWS for details.
2773 ** Prolog mode has been completely revamped, with lots of additional
2774 functionality such as more intelligent indentation, electricity,
2775 support for more variants, including Mercury, and a lot more.
2779 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2780 in the Rmail incoming message.
2782 *** The variable `rmail-message-filter' no longer has any effect.
2783 This change was made in Emacs 23.1 but was not advertised at the time.
2784 Try using `rmail-show-message-hook' instead.
2788 *** M-x shell prompts for the shell path name if the default directory
2789 is a remote file name and neither the environment variable $ESHELL nor
2790 the variable `explicit-shell-file-name' is set.
2792 *** TAB is now bound to the standard `completion-at-point' command,
2793 which now implements the pcomplete rules for shell command completion.
2797 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2798 if the mail server supports them. This uses either built-in GnuTLS
2799 support, or the starttls.el library. Customize `smtpmail-stream-type'
2802 *** The variable `smtpmail-auth-credentials' has been removed.
2803 By default, the information is now stored in the file ~/.authinfo.
2804 This was the default value of smtpmail-auth-credentials. If you had
2805 customized smtpmail-auth-credentials to a list of user names and
2806 passwords, those settings are not used. During your first connection
2807 to the smtp server, Emacs will prompt for the user name and password,
2808 and offer to save them to ~/.authinfo. Or you can manually copy the
2809 credentials to ~/.authinfo. For example, if you had
2811 (setq smtpmail-auth-credentials
2812 '(("mail.example.org" 25 "jim" "s!cret")))
2814 then the equivalent line in ~/.authinfo would be
2816 machine mail.example.org port 25 login jim password s!cret
2818 See the auth-source manual for more information, e.g. on encrypting
2819 the credentials file.
2821 *** The variable `smtpmail-starttls-credentials' has been removed.
2822 If you had that set, you need to put
2824 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2826 in your ~/.authinfo file instead.
2828 *** SMTPmail defaults to using the address in the From: header as the
2829 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2830 to the address you wish to use instead.
2834 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2835 and `sql-oracle-scan-on'.
2837 *** New options controlling prompting for login parameters.
2838 Each supported product has a custom variable `sql-*-login-params',
2839 which is a list of the parameters to be prompted for before a
2840 connection is established.
2842 *** The command `sql-product-interactive' now takes a prefix argument,
2843 which causes it to prompt for an SQL product.
2845 *** Product-specific SQL interactive commands now take prefix arguments.
2846 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2847 given a prefix argument, prompt for a name for the SQL interactive
2848 buffer. This reduces the need for calling `sql-rename-buffer'.
2850 *** SQL interactive modes suppress command continuation prompts, and
2851 replace tabs with spaces. The first change impacts multiple line SQL
2852 statements entered with C-j between each line, statements yanked into
2853 the buffer and statements sent with `sql-send-*' functions. The
2854 second prevents the MySQL and Postgres interpreters from listing
2855 object name completions when sent text via `sql-send-*' functions.
2857 *** New command `sql-connect' starts a predefined SQLi session,
2858 using the login parameters from `sql-connection-alist'.
2860 *** New "Save Connection" menu item in SQLi buffers.
2861 This gathers the login params specified for the SQLi session, if it
2862 was not started by a connection, and saves them as a new connection.
2864 *** New commands for listing database objects and details:
2865 sql-list-all and sql-list-table.
2867 *** An API for manipulating SQL product definitions has been added.
2871 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2875 *** New inline access method "ksu" (kerberized su).
2877 *** The following access methods are discontinued: "ssh1_old",
2878 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2880 *** The user option `remote-file-name-inhibit-cache' controls whether
2881 remote file attributes are cached for better performance.
2883 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2884 default value to "".
2886 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2887 for remote machines which support SELinux.
2889 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2890 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2891 the degree of parallelism.
2893 ** VC and related modes
2895 *** Support for pulling on distributed version control systems.
2896 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2897 supported (currently with Bzr, Git, and Mercurial), to update the
2898 current branch and working tree. A prefix argument means to prompt
2899 the user for specifics, e.g. a pull location.
2901 *** `vc-update' is now an alias for `vc-pull'.
2903 *** Support for merging on distributed version control systems.
2904 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2905 is supported (currently with Bzr, Git, and Mercurial), to merge
2906 changes from another branch into the current one. It prompts for
2907 specifics, e.g. a merge source.
2909 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2910 shows a diff while querying the user. It defaults to t.
2912 *** Log entries in some Log View buffers can be toggled to display a
2913 longer description by typing RET (log-view-toggle-entry-display).
2914 This is currently supported for Bzr, Git, and Mercurial (to support
2915 another backend, define a `log-view-expanded-log-entry-function').
2916 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
2917 use this to display the full log entry for the revision at point.
2919 *** New command `vc-ediff' allows visual comparison of two revisions
2920 of a file similar to `vc-diff', but using ediff backend.
2922 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
2923 this was not advertised at the time.
2925 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2926 Since Emacs 23, it has done the same thing as `toggle-read-only', but
2927 this was not advertised at the time.
2933 *** erc-hecomplete.el (use erc-pcomplete.el instead)
2935 *** partial-completion-mode (complete.el) is obsolete.
2936 You can get a comparable behavior with:
2937 (setq completion-styles '(partial-completion initials))
2938 (setq completion-pcm-complete-word-inserts-delimiters t)
2940 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2942 *** pgg is obsolete (use EasyPG instead).
2944 *** sregex.el is obsolete, since rx.el is a strict superset.
2946 *** s-region.el and pc-select.el are obsolete.
2947 They are superseded by shift-select-mode, enabled by default since 23.1.
2949 *** vc-mcvs.el is obsolete (for lack of a maintainer).
2953 *** The Landmark game is now invoked with `landmark', not `lm'.
2954 Its functions and variables have been similarly renamed.
2956 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
2957 (This interfered with cua-mode.)
2959 *** f90.el has some support for Fortran 2008 syntax.
2961 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
2963 *** New command `nato-region' converts text to NATO phonetic alphabet.
2966 * New Modes and Packages in Emacs 24.1
2968 ** Occur Edit mode applies edits made in *Occur* buffers to the
2969 original buffers. It is bound to "e" in Occur mode.
2971 ** New global minor mode electric-pair-mode.
2972 When enabled, typing an open parenthesis automatically inserts the
2973 matching closing one.
2975 ** New global minor mode electric-indent-mode.
2976 When enabled, typing certain characters triggers reindentation.
2977 Major modes wishing to use this can set electric-indent-chars or
2978 electric-indent-functions.
2980 ** New global minor mode electric-layout-mode.
2981 When enabled, typing certain characters automatically inserts newlines.
2982 Major modes wishing to use this can set electric-layout-rules.
2984 ** tabulated-list.el provides a generic major mode for tabulated data,
2985 from which other modes can be derived.
2987 ** pcase.el provides the ML-style pattern matching macro `pcase'.
2989 ** secrets.el is an implementation of the Secret Service API, an
2990 interface to password managers like GNOME Keyring or KDE Wallet. The
2991 Secret Service API requires D-Bus for communication. The command
2992 `secrets-show-secrets' offers a buffer with a visualization of the
2995 ** notifications.el provides an implementation of the Desktop
2996 Notifications API. It requires D-Bus for communication.
2998 ** soap-client.el supports access to SOAP web services from Emacs.
2999 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3001 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3003 ** New emacs-lock.el package.
3004 The previous version has been moved to obsolete/old-emacs-lock.el.
3005 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3006 against exiting Emacs and killing the buffer can be set separately.
3007 The mechanism for automatically turning off protection for buffers
3008 with dead inferior processes has been generalized.
3011 * Incompatible Lisp Changes in Emacs 24.1
3013 ** Passing a nil argument to a minor mode function call now ENABLES
3014 the minor mode unconditionally. This is so that you can write e.g.
3016 (add-hook 'text-mode-hook 'foo-mode)
3018 to enable foo-mode in Text mode buffers, removing the need for
3019 `turn-on-foo-mode' style functions. This affects all mode commands
3020 defined by `define-minor-mode'. If called interactively, the mode
3021 command still toggles the minor mode.
3023 ** The return value of `backup-buffer' has changed.
3024 It is now a list of three elements, where the second element is a list
3025 describing the original file's SELinux context. If Emacs or the
3026 system lacks SELinux support, the context list is (nil nil nil nil).
3027 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3029 ** `char-direction-table' and the `char-direction' function were deleted.
3030 They were buggy and inferior to the new support of bidirectional
3031 editing introduced in Emacs 24. If you need the bidirectional
3032 properties of a character, use `get-char-code-property' with the last
3033 argument `bidi-class'.
3035 ** `copy-directory' now copies the source directory as a subdirectory
3036 of the target directory, if the latter is an existing directory. The
3037 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3038 the contents directly into a pre-existing target directory.
3040 ** For mouse click input events in the text area, the Y pixel
3041 coordinate in the POSITION list now counts from the top of the text
3042 area, excluding any header line. Previously, it counted from the top
3045 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3046 been further reduced. Now a backquote not followed by a space is
3047 always treated as a "new-style" backquote. Please remove all
3048 "old-style" backquotes from your code. If your code uses backquotes
3049 as documented in the Elisp manual, and compiles without warning, then
3050 you have nothing to do in this regard. Code not following the
3051 appropriate conventions may fail to compile.
3053 The most common cause of trouble seems to be an old-style backquote
3054 followed by a newline. Another cause of trouble is vector notation
3055 for key sequence notation: instead of [(control ,)] and [(control ')],
3056 you should write [(control ?,)] and [(control ?')], which will work in
3059 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3060 was not advertised at the time. The function `custom-initialize-delay'
3061 replaced all known uses.
3063 ** `view-buffer' now treats special mode-class in the same way that
3064 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3065 major mode is special).
3067 ** Menu and tool bar changes
3069 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3070 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3071 With these alist entries omitted, `make-frame' checks the value of the
3072 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3073 a menu-bar or tool-bar, respectively. If the alist entries are added,
3074 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3076 *** The menu bar bindings's caches are not used any more.
3077 Use (where-is-internal <def> nil t) instead.
3079 ** Regions created by mouse dragging are now normal active regions,
3080 similar to those created by shift-selection (see Selection changes
3081 above). In previous Emacs versions, these regions were delineated by
3082 `mouse-drag-overlay'; that variable has been removed.
3084 ** The fourth argument of `filter-buffer-substring' has been removed.
3085 If you want to remove text properties from the final result, simply
3086 pass the result through substring-no-properties.
3088 ** cl.el no longer provides `cl-19'.
3090 ** The following obsolete functions and aliases have been removed
3091 (the appropriate new function is given in parentheses; "not needed"
3092 means you can just remove all calls to the function in question):
3094 *** `comint-kill-output' (`comint-delete-output')
3095 *** `decompose-composite-char' (`char-to-string')
3096 *** `outline-visible' (`outline-invisible-p')
3097 *** `internal-find-face' (`facep')
3098 *** `internal-get-face' (`facep and check-face')
3099 *** `frame-update-faces' (not needed)
3100 *** `frame-update-face-colors' (`frame-set-background-mode')
3101 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3102 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3103 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3104 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3105 *** `x-make-font-unbold' (`make-face-unbold')
3106 *** `x-make-font-unitalic' (`make-face-unitalic')
3107 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3108 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3109 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3110 *** `char-bytes' (== 1)
3111 *** `isearch-return-char' (`isearch-printing-char')
3112 *** `make-local-hook' (not needed)
3113 *** `set-screen-height' (`set-frame-height')
3114 *** `set-screen-width' (`set-frame-width')
3116 ** The following obsolete variables and varaliases have been removed
3117 (the appropriate new variable is given in parentheses):
3119 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3120 *** `vc-header-alist' (`vc-BACKEND-header')
3121 *** `directory-sep-char' (== ?/)
3122 *** `font-lock-defaults-alist' (`font-lock-defaults')
3123 *** `e' (`float-e').
3125 ** The following obsolete files were removed:
3126 sc.el, x-menu.el, rnews.el, rnewspost.el
3128 ** The format of the finder-inf.el file has changed, since the Finder
3129 mechanism is now based on the package system. The variable
3130 `finder-package-info' is replaced by `package--builtins' and
3131 `finder-keywords-hash'.
3133 ** When generating autoloads, `update-directory-autoloads' no longer
3134 assumes every inspected file is in your `load-path'. It instead
3135 generates relative names according to the current `load-path'.
3138 * Lisp Changes in Emacs 24.1
3140 ** Code can now use lexical scoping by default instead of dynamic scoping.
3141 The `lexical-binding' variable enables lexical scoping for local
3142 variables. It is typically set via a file-local variable in the first
3143 line of the file, in which case it applies to all the code in that
3146 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3147 binding instead of the old dynamic binding mode.
3149 *** Lexically scoped interpreted functions are represented with a new form
3150 of function value which looks like (closure ENV ARGS &rest BODY).
3152 *** New macro `letrec' to define recursive local functions.
3154 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3155 So do `defcustom' and other forms that call `defvar' as a subroutine.
3157 *** New function `special-variable-p' to check whether a variable is
3158 declared as dynamically bound.
3160 *** The form ((lambda ...) ...) is deprecated.
3162 ** An Emacs Lisp testing tool is now included.
3163 Emacs Lisp developers can use this tool to write automated tests for
3164 their code. See the ERT info manual for details.
3166 ** Changes for bidirectional display and editing
3168 *** New function `current-bidi-paragraph-direction'.
3169 This returns the base direction of the paragraph at point.
3171 *** New function `bidi-string-mark-left-to-right'.
3172 Given a string containing characters from right-to-left scripts, this
3173 function returns another string which can be safely inserted into a
3174 buffer, such that any following text will be always displayed to the
3175 right of that string. (This works by appending an invisible Unicode
3176 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3178 This is useful when the buffer has overall left-to-right paragraph
3179 direction and you need to insert a string whose contents are not known
3180 in advance, without disrupting the layout of the line.
3184 *** Window tree functions are accessible in Elisp.
3185 Functions are provided to return the parent, siblings or child windows
3186 of any window including internal windows (windows not associated with a
3187 buffer) in the window tree.
3189 **** New function `window-valid-p' gives non-nil for live and internal
3192 **** Window manipulation can deal with internal windows.
3193 Many window handling functions like `split-window', `delete-window', or
3194 `delete-other-windows' as well as the window resizing functions can now
3195 act on any window including internal ones.
3197 *** window-total-height/-width vs window-body-height/-width.
3198 The function `window-height' has been renamed to `window-total-height'
3199 and `window-width' has been renamed to `window-body-width'. The old
3200 names are provided as aliases. Two new functions `window-total-width'
3201 and `window-body-height' are provided.
3203 *** Window parameters specific to window handling functions.
3204 For each window you can specify a parameter to override the default
3205 behavior of a number of functions like `split-window', `delete-window'
3206 and `delete-other-windows'. The variable `ignore-window-parameters'
3207 allows to ignore processing such parameters.
3209 *** New semantics of third argument of `split-window'.
3210 The third argument of `split-window' has been renamed to SIDE and can be
3211 set to any of the values 'below, 'right, 'above, or 'left to make the
3212 new window appear on the corresponding side of the window that shall be
3213 split. Any other value of SIDE will cause `split-window' to split the
3214 window into two side-by-side windows as before.
3216 *** Window resizing functions.
3217 A new standard function for resizing windows called `window-resize' has
3218 been introduced. This and all other functions for resizing windows no
3219 longer delete any windows when they become too small.
3221 *** Deleting the selected window now selects the most recently selected
3222 live window on that frame instead.
3224 *** `adjust-window-trailing-edge' adjustments.
3225 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3226 is able to resize other windows if a window adjacent to the trailing
3227 edge cannot be shrunk any more. This makes its behavior more similar to
3228 that of Emacs 21 without compromising, however, its inability to delete
3229 windows which was introduced in Emacs 22.
3231 *** Window-local buffer lists.
3232 Windows now have local buffer lists. This means that removing a buffer
3233 from display in a window will preferably show the buffer previously
3234 shown in that window with its previous window-start and window-point
3235 positions. This also means that the same buffer may be automatically
3236 shown twice even if it already appears in another window.
3238 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3239 which if non-nil requires the buffer to be displayed in the currently
3240 selected window, signaling an error otherwise. If nil, another window
3241 can be used, e.g. if the selected one is strongly dedicated.
3243 *** `split-window-vertically' and `split-window-horizontally' renamed
3244 to `split-window-below' and `split-window-right' respectively.
3245 The old names are kept as aliases.
3249 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3250 named ACTION, and takes a display action of the same form as
3251 `display-buffer-base-action' (see Changes, above). A non-nil,
3252 non-list value is treated specially, as the old meaning.
3254 **** New variable `display-buffer-overriding-action'.
3256 **** The procedure of `display-buffer' etc. to choose a window is
3257 determined by combining `display-buffer-overriding-action',
3258 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3259 and `display-buffer-fallback-action'. The second and fourth of these
3260 are user-customizable variables.
3262 See the docstring of `display-buffer' for details.
3264 *** New functions `window-state-get' and `window-state-put'.
3265 These functions allow to save and restore the state of an arbitrary
3266 frame or window as an Elisp object.
3270 *** New variable `completion-extra-properties' used to specify extra
3271 properties of the current completion:
3272 - :annotate-function, same as the old completion-annotate-function.
3273 - :exit-function, function to call after completion took place.
3275 *** Functions on `completion-at-point-functions' can return any of the
3276 properties valid for `completion-extra-properties'.
3278 *** `completion-annotate-function' is obsolete.
3280 *** New `metadata' method for completion tables. The metadata thus returned
3281 can specify various details of the data returned by `all-completions':
3282 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3283 used to select a style in completion-category-overrides.
3284 - `annotation-function' to add annotations in *Completions*.
3285 - `display-sort-function' to specify how to sort entries in *Completions*.
3286 - `cycle-sort-function' to specify how to sort entries when cycling.
3288 *** `minibuffer-local-filename-must-match-map' is not used any more.
3289 Instead, the bindings in `minibuffer-local-filename-completion-map'
3290 are combined with `minibuffer-local-must-match-map'.
3292 *** New variable `completing-read-function' allows overriding the
3293 behavior of `completing-read'.
3295 ** `glyphless-char-display' can now distinguish between graphical and
3296 text terminal display, via a char-table entry that is a cons cell.
3298 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3299 Instead, the offending function is removed.
3303 *** New function `run-hook-wrapped' for running an abnormal hook by
3304 passing the hook functions as arguments to a "wrapping" function.
3305 Like `run-hook-with-args-until-success', it stops at the first
3306 non-nil return value.
3308 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3309 set of "wrapping" filters, similar to around advice.
3310 (A version of this macro was actually added in Emacs 23.2 but was not
3311 advertised at the time.)
3315 *** New macro `condition-case-unless-debug' (this was actually added in
3316 Emacs 23.1 as condition-case-no-debug, but not advertised)
3318 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3320 *** Variable `stack-trace-on-error' removed.
3322 *** The debugger can now "continue" from an error, which means it will
3323 jump to the error handler as if the debugger had not been invoked
3324 instead of jumping all the way to the top-level.
3326 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3327 This can be useful when `inhibit-quit' is set.
3329 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3330 named Emacs server instances.
3332 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3333 to redirect STDOUT to a file.
3335 ** The function `format-time-string' now supports the %N directive,
3336 for higher-resolution time stamps.
3338 ** New input reading functions
3340 *** New function `read-char-choice' reads a restricted set of
3341 characters, discarding any inputs not inside the set.
3343 *** The command `read-color' now requires a match for a color name
3344 or RGB triplet, instead of signaling an error if the user provides
3347 **** `facemenu-read-color' is now an alias for `read-color'.
3349 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3350 The variable is now used to load all kind of supported dynamic libraries,
3351 not just image libraries. The previous name is still available as an
3354 ** Syntax parsing changes
3356 *** New variable `syntax-propertize-function'.
3357 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3358 This allows syntax-table properties to be set independently from font-lock:
3359 just call syntax-propertize to make sure the text is propertized.
3360 Together with this new variable come a new hook
3361 syntax-propertize-extend-region-functions, as well as two helper functions:
3362 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3363 as-is; and syntax-propertize-rules which provides a new way to specify
3366 *** Syntax tables support a new "comment style c" additionally to style b.
3368 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3370 ** frame-local variables cannot be let-bound any more.
3372 ** Major and minor mode changes
3374 *** `set-auto-mode' now respects mode: local variables at the end of files,
3375 as well as those in the -*- line.
3377 *** `prog-mode' is a new major mode from which programming modes
3380 **** `prog-mode-hook' can be used to enable features for programming
3381 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3382 on-the-fly spell checking for comments and strings.
3384 **** New minor modes `prettify-symbols-mode' and
3385 `global-prettify-symbols-mode' let the user enable symbol
3386 prettification (replacing a string like "lambda" with the Greek lambda
3389 *** New hook `change-major-mode-after-body-hook', run by
3390 `run-mode-hooks' just before any other mode hooks.
3392 *** Enabled globalized minor modes can be disabled in specific major modes.
3393 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3394 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3396 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3398 ** File-handling changes
3400 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3401 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3402 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3403 argument is supplied (see Trash changes, above).
3405 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3407 ** Tool-bars can display separators.
3408 Tool-bar separators are handled like menu separators in menu-bar maps,
3409 i.e. via menu entries of the form `(menu-item "--")'.
3413 *** Animated images support (currently animated gifs only).
3415 **** `image-animated-p' returns non-nil if an image can be animated.
3417 **** `image-animate' animates a supplied image spec.
3419 **** `image-animate-timer' returns the timer object for an image that
3422 *** `image-extension-data' has been renamed to `image-metadata'.
3423 The old name is an obsolete alias to the new one.
3425 *** Image mode can view any image type that ImageMagick supports.
3426 This requires Emacs to be built with ImageMagick support.
3428 **** New function `imagemagick-types', defined if ImageMagick support
3429 is enabled, returns a list of image file extensions that your
3430 ImageMagick installation supports.
3432 **** New function `imagemagick-register-types' enables ImageMagick
3433 image types in Image mode and in `create-image' and other helper
3436 **** New option `imagemagick-types-inhibit' excludes certain
3437 ImageMagick image types from `imagemagick-register-types'.
3439 **** With ImageMagick support, there are extra Image mode commands to
3440 resize and rotate images: `image-transform-fit-to-height',
3441 `image-transform-fit-to-width', `image-transform-set-rotation', and
3442 `image-transform-set-scale'.
3444 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3445 passes it to the mail user agent function. This argument specifies an
3446 action for returning to the caller after finishing with the mail. For
3447 example, this is used by Rmail to optionally delete a mail window.
3449 ** XML and HTML parsing
3450 If Emacs is compiled with libxml2 support, there are two new
3451 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3452 and `libxml-parse-xml-region' (which parses XML). Both return an
3453 Emacs Lisp parse tree.
3455 ** Networking and encryption changes
3457 *** `open-network-stream' can now be used to open an encrypted stream.
3458 It now accepts an optional `:type' parameter for initiating a TLS
3459 connection, directly or via STARTTLS. To do STARTTLS, additional
3460 parameters (`:end-of-command', `:success', `:capabilities-command')
3461 must also be supplied.
3463 *** New library gnutls.el.
3464 The new function `gnutls-available-p' returns non-nil if Emacs is
3465 built with GnuTLS support. The main entry points are
3466 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3467 these functions through `open-network-stream', because that can
3468 upgrade connections through STARTTLS opportunistically or use plain
3469 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3472 *** New primitive `secure-hash' that supports many secure hash algorithms:
3473 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3474 sha1.el has been removed. The `sha1' feature is provided by default.
3478 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3480 ** Progress reporters can now "spin".
3481 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3482 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3483 time you call `progress-reporter-update' on that progress reporter,
3484 with a nil or omitted VALUE argument, the reporter message is
3485 displayed with a "spinning bar".
3487 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3488 being reverted, even if the buffer has a local `revert-buffer-function'.
3490 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3491 If delayed-warnings-list is non-nil, the command loop calls
3492 `delayed-warnings-hook' after `post-command-hook'. At present, this
3493 is only used by Emacs on some platforms to display warnings during
3494 startup, which might otherwise not be noticed. This uses the
3495 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3497 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3499 ** New function `make-composed-keymap' that constructs a new keymap
3500 from multiple input maps. You can use this to make a keymap that
3501 inherits from multiple maps, eg:
3502 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3504 ** New function `string-prefix-p'.
3505 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3507 ** New reader macro ## that stands for the empty symbol.
3508 This means that the empty symbol can now be read back. Also, #: by itself
3509 (when not immediately followed by a possible symbol character) stands for
3510 an empty uninterned symbol.
3512 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3514 ** The following functions and variables are obsolete:
3516 *** `tooltip-use-echo-area' is obsolete.
3517 Rather than setting this to t, disable Tooltip mode instead.
3519 *** buffer-substring-filters is obsolete.
3520 Use `filter-buffer-substring-functions' instead.
3522 *** `byte-compile-disable-print-circle' is obsolete.
3524 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3525 Use `post-command-hook' instead.
3527 *** `font-lock-maximum-size' is obsolete.
3530 * Changes in Emacs 24.1 on Non-Free Operating Systems
3532 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3533 and also when HOME is set to C:\ by default.
3535 ** New configure.bat options
3537 *** --enable-checking builds Emacs with extra runtime checks.
3539 *** --distfiles specifies files to be included in binary distribution.
3541 *** --without-gnutls disables automatic GnuTLS detection.
3543 *** --lib for general library linkage, works with the USER_LIBS build variable.
3545 ** New make target `dist' to create binary distribution for MS Windows.
3547 ** The Lisp function `w32-default-color-map' is now obsolete.
3548 (It is only used internally in the Emacs C code.)
3550 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3551 reappear on mouse-over. (Requires OS X 10.6 or later.)
3553 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3554 other platforms, rather than inserting its contents into the buffer.
3557 ----------------------------------------------------------------------
3558 This file is part of GNU Emacs.
3560 GNU Emacs is free software: you can redistribute it and/or modify
3561 it under the terms of the GNU General Public License as published by
3562 the Free Software Foundation, either version 3 of the License, or
3563 (at your option) any later version.
3565 GNU Emacs is distributed in the hope that it will be useful,
3566 but WITHOUT ANY WARRANTY; without even the implied warranty of
3567 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3568 GNU General Public License for more details.
3570 You should have received a copy of the GNU General Public License
3571 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3576 paragraph-separate: "[
\f]*$"