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 now 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 now 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.
49 If this library is present (which it normally is on most systems), the
50 function `zlib-decompress-region' becomes available, which can
51 decompress gzip- 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 ** The user option `initial-buffer-choice' can now specify a function
88 to set up the initial buffer.
91 * Changes in Emacs 24.4
94 ** Emacs now supports menus on text-mode terminals.
95 If the terminal supports a mouse, clicking on the menu bar, or on
96 sensitive portions of the mode line or header line, will drop down the
97 menu defined at that position. Likewise, clicking C-mouse-2 or
98 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
101 If the text terminal does not support a mouse, you can activate the
102 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
104 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
105 customize the option `tty-menu-open-use-tmm' to a non-nil value.
106 (Typing M-` will always invoke `tmm-menubar', even if
107 `tty-menu-open-use-tmm' is nil.)
110 ** The *Messages* buffer is created in `messages-buffer-mode',
111 a new major mode, with read-only status. Any code that might create
112 the *Messages* buffer should call the function `messages-buffer' to do
113 so and set up the mode.
115 ** Emacs now supports ACLs (access control lists).
117 *** Emacs preserves the ACL entries of files when backing up.
119 *** New functions `file-acl' and `set-file-acl' get and set the ACL
120 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
121 libacl. On MS-Windows, the NT Security APIs are used to emulate the
122 POSIX ACL interfaces.
124 ** Multi-monitor support has been added.
126 *** New functions `display-monitor-attributes-list' and
127 `frame-monitor-attributes' can be used to obtain information about
128 each physical monitor on multi-monitor setups.
130 *** The functions `display-pixel-width' and `display-pixel-height' now
131 behave consistently among the platforms: they return the pixel width
132 or height for all physical monitors associated with the given display
133 as just they were on X11. To get information for each physical
134 monitor, use the new functions above. Similar notes also apply to
135 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
136 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
139 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
140 You can change the default by customizing `blink-cursor-blinks'.
143 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
144 This affects View mode, etc.
149 *** The command `apropos-variable' is renamed to `apropos-user-option'.
150 `apropos-user-option' shows all user options while `apropos-variable'
151 shows all variables. When called with a universal prefix argument,
152 the two commands swap their behaviors. When `apropos-do-all' is
153 non-nil, they output the same results.
156 *** The key `?' now describes prefix bindings, like `C-h'.
158 *** The command `quail-help' is deleted. Use `C-h C-\'
159 (`describe-input-method') instead.
161 ** Frame and window changes
164 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
165 bound to <f11> and M-<f10>, respectively.
167 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
168 `frame-configuration-to-register'. It offers similar functionality,
169 plus enhancements like the ability to restore deleted frames. The
170 command `frame-configuration-to-register' still exists, but is unbound.
172 *** New hooks `focus-in-hook', `focus-out-hook'.
173 These are normal hooks run when an Emacs frame gains or loses input focus.
176 *** `split-window' is now a non-interactive function, not a command.
177 As a command, it was a special case of `C-x 2' (`split-window-below'),
178 and as such superfluous. After being reimplemented in Lisp, its
179 interactive form was mistakenly retained.
181 *** New option `scroll-bar-adjust-thumb-portion'.
182 Available only on X, this option allows to control over-scrolling
183 using the scroll bar (i.e. dragging the thumb down even when the end
184 of the buffer is visible).
186 ** Lisp evaluation changes
188 *** `eval-defun' on an already defined defcustom calls the :set function,
191 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
192 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
193 a list with no limit on its length and level (by using nil values of
194 `print-length' and `print-level'), and inserts additional formats for
195 integers (octal, hexadecimal, and character).
198 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
201 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
202 because it affects caching of paragraph scanning results as well.
205 ** The option `set-mark-default-inactive' has been deleted.
206 This unfinished feature was introduced by accident in Emacs 23.1;
207 simply disabling Transient Mark mode does the same thing.
209 ** The default value of `comment-use-global-state' is changed to t,
210 and this variable has been marked obsolete.
213 * Editing Changes in Emacs 24.4
215 ** Indentation changes
218 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
219 When invoked without a prefix argument, it now activates a transient
220 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
221 the text indentation in the region. Typing any other key resumes
222 normal editing behavior.
225 *** `electric-indent-mode' is enabled by default.
227 *** `tab-stop-list' is now implicitly extended to infinity by repeating
228 the last step. Its default value is changed to nil which means a tab
229 stop every `tab-width' columns.
233 *** New command `cycle-spacing' cycles between spacing conventions:
234 having just one space, no spaces, or reverting to the original
235 spacing. Like `just-one-space', it can handle or ignore newlines and
236 leave different number of spaces.
238 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
239 a 1-letter word, which is an error according to Polish and
240 Czech typography rules. To globally enable this feature, evaluate:
242 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
245 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
247 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
248 Most commands are still unaware of it, but kill/yank do work on the rectangle.
251 ** New option `visual-order-cursor-movement'.
252 If this is non-nil, cursor motion with arrow keys will follow the
253 visual order of characters on the screen: <left> always moves to the
254 left, <right> always moves to the right, disregarding the surrounding
255 bidirectional context.
259 *** All register commands can now show help with preview.
261 *** New command `kmacro-to-register' stores keyboard macros in registers.
263 *** New command `C-x r f' (`frameset-to-register').
264 See Changes in Emacs 24.4, above.
266 ** New command `delete-duplicate-lines'.
267 When its arg ADJACENT is non-nil (when called interactively with C-u
268 C-u) it works like the utility `uniq'. Otherwise by default it
269 deletes duplicate lines everywhere in the region without regard to
270 adjacency. When its arg KEEP-BLANKS is non-nil (when called
271 interactively with C-u C-u C-u), duplicate blank lines are preserved.
274 * Changes in Specialized Modes and Packages in Emacs 24.4
276 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
278 ~/.emacs.d/timelog replaces ~/.timelog
279 ~/.emacs.d/vip replaces ~/.vip
280 ~/.emacs.d/viper replaces ~/.viper
281 ~/.emacs.d/ido.last replaces ~/.ido.last
282 ~/.emacs.d/kkcrc replaces ~/.kkcrc
283 ~/.emacs.d/quickurls replaces ~/.quickurls
284 ~/.emacs.d/idlwave replaces ~/.idlwave
285 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
286 ~/.emacs.d/places replaces ~/.emacs-places
287 ~/.emacs.d/shadows replaces ~/.shadows
288 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
289 ~/.emacs.d/strokes replaces ~/.strokes
290 ~/.emacs.d/notes replaces ~/.notes
291 ~/.emacs.d/type-break replaces ~/.type-break
292 Also the following files used by the now obsolete otodo-mode.el:
293 ~/.emacs.d/todo-do replaces ~/.todo-do
294 ~/.emacs.d/todo-done replaces ~/.todo-done
295 ~/.emacs.d/todo-top replaces ~/.todo-top
297 ** Backtrace and debugger
299 *** The Lisp debugger's `e' command now includes the lexical environment
300 when evaluating the code in the context at point. Hence, it now lets
301 you access lexical variables.
303 *** New command `v' (`debuger-toggle-locals) displays local vars.
305 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
306 code run via JIT Lock.
310 *** Battery information via the BSD `apm' utility is now supported.
314 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
316 ** Calendar and Diary
318 *** New faces `calendar-weekday-header', `calendar-weekend-header',
319 and `calendar-month-header'.
321 *** New option `calendar-day-header-array'.
324 *** New variable `diary-from-outlook-function', used by the command
325 `diary-from-outlook'.
327 *** The variable `calendar-font-lock-keywords' is obsolete.
331 *** Calc by default now uses the Gregorian calendar for all dates, and
332 uses January 1, 1 AD as its day number 1. Previously Calc used the
333 Julian calendar for dates before September 14, 1752, and it used
334 December 31, 1 BC as its day number 1; the new scheme is more
335 consistent with Calendar's calendrical system and day numbering.
337 *** The new variable `calc-gregorian-switch' lets you configure the
338 date when Calc switches from the Julian to the Gregorian calendar.
339 Nil, the default value, means to always use the Gregorian calendar.
340 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
343 *** Support for ISO 8601 dates.
349 **** The cpp-root project now supports executing a compile command.
350 It can be set through the new :compile-command slot or the
351 buffer-local variable `compile-command'.
353 **** Better selection of include directories for the 'linux' project.
354 Include directories now support out-of-tree build directories and
355 target architecture auto-detection.
359 **** Improved detection of used namespaces in current scope in C++.
361 **** Parsing of default values for variables and function arguments in C/C++.
362 They are also displayed by the summarize feature in the modeline.
364 **** Improved parsing of function pointers in C/C++.
365 This also includes parsing of function pointers as function arguments.
367 **** Parsing of C/C++ preprocessor macros which open new scope.
368 For example, this enables parsing of macros which open new namespaces.
370 **** Support for 'this' pointer in inline member functions in C++.
374 *** New macro cl-tagbody.
377 *** letf is now just an alias for cl-letf.
381 *** CUA mode was changed to make use of delete-selection-mode and
382 shift-select-mode. So you can now enable it independently from
383 transient-mark-mode, delete-selection-mode, and shift-select-mode.
384 As a result, cua-highlight-region-shift-only is obsolete
385 (you can disable transient-mark-mode to get the same result).
387 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
389 ** Delete Selection mode can now be used without `transient-mark-mode'.
393 *** `desktop-auto-save-timeout' defines the number of seconds idle time
394 before auto-save of the desktop.
396 *** `desktop-restore-frames', enabled by default, allows saving and
397 restoring the frame/window configuration (frameset). Additional options
398 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
399 and `desktop-restore-forces-onscreen' offer further customization.
403 *** New minor mode `dired-hide-details-mode' hides details.
405 ** Eldoc Mode works properly in the minibuffer.
409 *** New option `epa-mail-aliases'.
411 You can set this to a list of alias expansions for keys to use
412 in `epa-mail-encrypt'.
414 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
415 that means: when one of the recipients of the message being encrypted
416 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
418 If one element of the variable's value is ("foo@bar.com"),
419 that means: when one of the recipients of the message being encrypted
420 is `foo@bar.com', ignore that name as regards encryption.
421 This is useful to avoid a query when you have no key for that name.
425 *** New option `erc-accidental-paste-threshold-seconds'.
426 If set to a number, this can be used to avoid accidentally paste large
427 amounts of data into the ERC input.
432 *** New macro `skip-unless' allows skipping ERT tests.
433 See the ERT manual for details.
438 *** `eshell' now supports visual subcommands and options
439 Eshell has been able to handle "visual" commands (interactive,
440 non-line oriented commands such as top that require display
441 capabilities not provided by eshell) by running them in an Emacs
442 terminal emulator. See `eshell-visual-commands'.
444 This feature has been extended to subcommands and options that make a
445 usually line-oriented command a visual command. Typical examples are
446 "git log" and "git <command> --help" which display their output in a
447 pager by default. See `eshell-visual-subcommands' and
448 `eshell-visual-options'.
451 *** Added Eshell-Tramp module
452 External su and sudo commands are now the default; the internal,
453 Tramp-using variants can still be used by enabling the eshell-tramp
458 *** New option `f90-smart-end-names'.
460 ** Icomplete is a bit more like Ido.
461 *** key bindings to navigate through and select the completions.
462 *** The icomplete-separator is customizable, and its default has changed.
463 *** Removed icomplete-show-key-bindings.
464 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
465 (setq icomplete-with-completion-tables '(internal-complete-buffer))
466 will revert to the old behavior.
469 *** Ido has a manual now.
470 *** `ido-use-virtual-buffers' takes a new value 'auto.
471 *** `ido-decorations' has been slightly extended to give a bit more control.
475 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
476 visit the next image file and the previous image file in the same
477 directory, respectively.
479 *** New commands to show specific frames of multi-frame images.
480 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
481 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
483 *** New commands to speed up, slow down, or reverse animation.
485 *** The command `image-mode-fit-frame' deletes other windows.
486 When toggling, it restores the frame's previous window configuration.
487 It also has an optional frame argument, which can be used by Lisp
488 callers to fit the image to a frame other than the selected frame.
492 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
493 will cycle through faces in `hi-lock-face-defaults' without prompting.
496 *** New global command `M-s h .' (`highlight-symbol-at-point')
497 highlights the symbol found near point without prompting,
498 using the next face automatically.
502 *** New option `imenu-generic-skip-comments-and-strings'.
506 *** New face `info-index-match' is used to highlight matches in index
507 entries displayed by `Info-index-next', `Info-virtual-index' and
512 *** Better indentation of multiple-variable declarations.
513 If declaration spans several lines, variables on the following lines
514 are lined up to the first one.
516 *** We now recognize and better indent continuations in array
519 *** New option `js-switch-indent-offset`.
521 ** MH-E has been updated to MH-E version 8.5.
522 See MH-E-NEWS for details.
526 *** Font locking for texinfo comments and new keywords
527 *** Completion in Octave file buffers
529 *** Jump to definition
530 *** Documentation lookup/search
531 *** Code cleanup and various bug fixes
533 ** OPascal mode is the new name for Delphi mode.
535 *** All delphi-* variables and functions have been renamed to opascal-*.
536 *** `delphi-newline-always-indents' is not supported any more.
537 Use `electric-indent-mode' instead.
538 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
542 *** The format of `archive-contents' files, generated by package
543 repositories, has changed to allow a new (fifth) element in the data
544 vectors, containing an associative list with extra properties.
546 *** `describe-package' buffer uses the `:url' extra property to
547 display a `Homepage' header, if it's present.
551 *** `prolog-use-smie' has been removed, along with the non-SMIE
556 *** The new command `remember-notes' creates a buffer which is saved
559 You may think of it as a *scratch* buffer whose content is preserved.
560 In fact, it was designed as a replacement for *scratch* buffer and can
561 be used that way by setting `initial-buffer-choice' to
562 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
563 Without the second change, *scratch* buffer will still be there for
564 notes that do not need to be preserved.
566 *** The Remember package can now store notes in separates files.
567 You can use the new function `remember-store-in-files' within the
568 `remember-handler-functions' option.
570 See `remember-data-directory' and `remember-directory-file-name-format'
571 for new options related to this function.
575 *** Customize `rmail-mbox-format' to influence some minor aspects of
576 how Rmail displays non-MIME messages.
579 *** The `unrmail' command now converts from BABYL to mboxrd format,
580 rather than mboxo. Customize `unrmail-mbox-format' to change this.
584 *** New option `ruby-encoding-magic-comment-style'.
586 *** New option `ruby-custom-encoding-magic-comment-template'.
590 *** Improved syntax highlighting and indentation.
592 *** Add more Ruby file types to `auto-mode-alist'.
594 *** New option `ruby-align-to-stmt-keywords'.
596 ** Search and Replace
598 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
599 starts a symbol (identifier) incremental search forward with the
600 symbol found near point added to the search string initially.
602 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
603 and adds it to the search string.
605 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
606 between nil and the value of the option `search-invisible' (or `open'
609 *** `query-replace' skips invisible text when `search-invisible' is nil,
610 and opens overlays with hidden text when `search-invisible' is `open'.
612 *** A negative prefix arg of replacement commands replaces backward.
613 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
614 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
617 *** By default, prefix arguments do not now terminate Isearch mode.
618 Set `isearch-allow-prefix' to nil to restore old behavior.
620 *** More Isearch commands accept prefix arguments, namely
621 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
624 *** Word search now matches whitespace at the beginning/end
625 of the search string if it contains leading/trailing whitespace.
626 In an incremental word search or when using a non-nil LAX argument
627 of `word-search-regexp', the lax matching can also match part of
628 the first word (in addition to the lax matching of the last word).
629 The same rules are now applied to the symbol search with the difference
630 that it matches symbols, and non-symbol characters between symbols.
635 *** New command `ses-rename-cell' allows assigning names to SES cells.
639 *** `explicit-bash-args' now always defaults to use --noediting.
640 During initialization, Emacs no longer expends a process to decide
641 whether it is safe to use Bash's --noediting option. These days
642 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
644 *** The SMIE indentation engine is now used by default.
648 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
649 You can pick the name of the function and the variables with `C-x 4 a'.
651 ** SMIE indentation can be customized via `smie-config'.
652 The customization can be guessed by Emacs by providing a sample indented
653 file and letting SMIE learn from it.
657 *** New option `term-suppress-hard-newline'.
659 ** Todo mode has been rewritten and enhanced.
660 New features include:
661 - support for multiple todo files and archive files of done items;
662 - renaming, reordering, moving, merging, and deleting categories;
663 - sortable tabular summaries of categories and the types of items they contain;
664 - cross-category lists of items filtered by specific criteria;
665 - more fine-grained interaction with the Emacs diary, by being able to decide
666 for each todo item whether it appears in the Fancy Diary display;
667 - highly flexible new item insertion and item editing;
668 - moving items between categories, storing done items in their category or in
669 archive files, undoing or unarchiving done items;
670 - reprioritizing items by inputting a numerical priority;
671 - extensive customizability of operation and display, including numerous faces.
672 The Todo mode user manual describes all commands and most user options.
673 To support some of these features, a new file format is used, which is
674 incompatible with the old format; however, you can convert old todo and done
675 item files to the new format on initializing the first new todo file, or at any
676 later time with the provided conversion command. The old version of
677 todo-mode.el has been made obsolete and renamed otodo-mode.el.
679 ** trace-function was largely rewritten.
680 New features include:
681 - no prompting for the destination buffer, unless a prefix-arg was used.
682 - additionally to prompting for a destination buffer, when a prefix-arg is
683 used, the user can enter a "context", i.e. Lisp expression whose value at the
684 time the function is entered/exited will be printed along with the function
685 name and arguments. Useful to trace the value of (current-buffer) or
686 (point) when the function is invoked.
690 *** The experimental url syntax for remote file names is withdrawn.
693 *** New connection method "adb", which allows to access Android
694 devices by the Android Debug Bridge. The variable `tramp-adb-program'
695 can be used to adapt the path of the "adb" program, if needed.
697 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
698 "scpc" and "rsyncc" are discontinued. The ssh option
699 "ControlMaster=auto" is set automatically in all ssh-based methods,
703 *** Handlers for `file-acl' and `set-file-acl' for remote machines
704 which support POSIX ACLs.
707 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
708 for remote machines which support filesystem notifications.
710 ** VC and related modes
712 *** In VC directory mode, `D' displays diffs between VC-controlled
713 whole tree revisions.
715 *** In VC directory mode, `L' lists the change log for the current VC
716 controlled tree in a window.
718 *** In VC directory mode, `I' shows a log of changes that will be
719 received with a pull operation.
721 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
722 under current version control system. When called with a prefix
723 argument, you can remove a file from the ignored file list.
725 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
726 because it is moved to vc-cvs.el.
730 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
732 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
736 *** The commands `woman-default-faces' and `woman-monochrome-faces'
737 are obsolete. Customize the `woman-*' faces instead.
739 ** Obsolete packages:
741 *** Iswitchb is made obsolete by icomplete-mode.
743 *** longlines.el is obsolete; use visual-line-mode instead.
748 *** terminal.el is obsolete; use term.el instead.
750 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
755 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
758 *** The Info-edit command is obsolete. Editing Info nodes by hand
759 has not been relevant for some time.
762 * New Modes and Packages in Emacs 24.4
764 ** New package `eww' is a built-in web browser.
765 It is only available if Emacs is compiled with libxml2 support.
767 ** New minor mode `superword-mode', defined in subword.el
768 `superword-mode' overrides the default word motion commands to treat
769 symbol_words as a single word, similar to what `subword-mode' does and
770 using the same internal functions.
772 ** New package nadvice.el offers lighter-weight advice facilities.
774 - add-function/remove-function which can be used to add/remove code on any
775 function-carrying place, such as process-filters or `<foo>-function' hooks.
776 - advice-add/advice-remove to add/remove a piece of advice on a named function,
777 much like `defadvice' does.
779 ** New package frameset.el.
780 It provides a set of operations to save a frameset (the state of all
781 or a subset of the existing frames and windows, somewhat similar to a
782 frame configuration), both in-session and persistently, and restore it
783 at some point in the future.
786 ** New package filenotify.el provides an interface for file system
787 notifications. It requires that Emacs be compiled with one of the
788 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
791 * Incompatible Lisp Changes in Emacs 24.4
793 ** `kill-region' lost its `yank-handler' optional argument.
795 ** `(input-pending-p)' no longer runs other timers which are ready to
796 run. The new optional CHECK-TIMERS param allows for the prior behavior.
798 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
800 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
801 Some languages match those as »...« and others as «...» so better stay neutral.
803 ** In compiled Lisp files, the header no longer includes a timestamp.
805 ** The default file coding for Emacs Lisp files is now utf-8.
806 (See `file-coding-system-alist'.) In most cases, this change is
807 transparent, but files that contain unusual characters without
808 specifying an explicit coding system may fail to load with obscure
809 errors. You should either convert them to utf-8 or add an explicit
812 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
813 It used to disable the minor mode, major mode, and text-property keymaps,
814 whereas now it simply has higher precedence.
816 ** Default process filters and sentinels are not nil any more.
817 Instead they default to a function which does what the nil value used to do.
819 ** `read-event' does not return decoded chars in ttys any more.
820 Just as was the case in Emacs-22 and before, decoding of tty input according to
821 keyboard-coding-system is not performed in read-event any more. But contrary
822 to that past, it is still done before input-decode-map/function-key-map/...
824 ** Removed inhibit-local-menu-bar-menus.
826 ** frame-local variables that affect redisplay do not work any more.
827 More specifically, the redisplay does not bother to check for a frame-local
828 value when looking up variables.
830 ** nil and "unbound" are indistinguishable in symbol-function.
831 `symbol-function' never signals `void-function' any more.
832 `fboundp' returns non-nil if the symbol was `fset' to nil.
834 ** `defadvice' does not honor the `freeze' flag and cannot advise
835 special-forms any more.
837 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
838 VAR was bound to nil which was not tremendously useful and just lead to
839 spurious warnings about an unused var.
841 ** The return value of `backup-buffer' has changed.
842 The second argument is no longer an SELinux context, instead it is an
843 alist of extended attributes as returned by the new function
844 `file-extended-attributes'. The attributes can be applied to another
845 file using `set-file-extended-attributes'.
847 ** `visited-file-modtime' now returns -1 for nonexistent files.
848 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
849 in the presence of files with negative time stamps.
851 ** The cars of the elements in `interpreter-mode-alist' are now treated
852 as regexps rather than literal strings. Technically this is an
853 incompatible change, but unless you are using interpreter-mode-alist
854 for something (not just adding elements to it), it ought not to affect you.
857 * Lisp Changes in Emacs 24.4
859 ** New variable `enable-dir-local-variables'.
860 Directory-local variables are ignored if this is set to nil. This may
861 be useful for modes that want to ignore directory-locals while still
862 respecting file-local variables.
864 ** New macro `define-alternatives' can be used to define generic commands.
865 Generic commands are interactive functions whose implementation can be
866 selected among several alternatives, as a matter of user preference.
868 ** New function `get-pos-property'.
870 ** Minibuffer changes
872 *** completing-read-multiple's separator can now be a regexp.
873 The default separator is changed to allow surrounding spaces around the comma.
875 *** New option `read-regexp-defaults-function' defines the function
876 that provides the default value for commands that ask for a regexp:
877 `rgrep', `lgrep' `occur', `multi-occur', `multi-occur-in-matching-buffers',
878 `highlight-regexp', `highlight-lines-matching-regexp', `highlight-phrase'.
879 This option can be customized to values that provide a default value
880 from the regexp last history element or from the symbol found at point.
882 ** New option `load-prefer-newer', if non-nil, means that when both
883 .el and .elc versions of a file exist, rather than `load' always
884 choosing the .elc version, it will choose whichever is newer
885 (unless you explicitly specify one or the other).
887 ** New hook `pre-redisplay-function'.
890 ** Functions that pop up menus and dialogs now work on all terminal types,
892 This includes `x-popup-menu', `x-popup-dialog', `message-box',
895 The function `display-popup-menus-p' will now return non-nil for a
896 display or frame whenever a mouse is supported on that display or
899 ** New bool-vector set operation functions:
900 *** `bool-vector-exclusive-or'
901 *** `bool-vector-union'
902 *** `bool-vector-intersection'
903 *** `bool-vector-set-difference'
904 *** `bool-vector-not'
905 *** `bool-vector-subsetp'
906 *** `bool-vector-count-consecutive'
907 *** `bool-vector-count-population'
910 ** Comparison functions =, <, >, <=, >= now take many arguments.
912 ** The second argument of `eval' can now be a lexical-environment.
914 ** `with-demoted-errors' takes an additional argument `format'.
916 ** New function `define-error'.
918 ** New hook `tty-setup-hook'.
921 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
923 ** New library subr-x.el for misc helper functions
924 *** `hash-table-keys'
925 *** `hash-table-values'
930 *** `string-trim-left'
931 *** `string-trim-right'
933 *** `string-remove-prefix'
934 *** `string-remove-suffix'
936 ** Obsoleted functions:
939 *** `lisp-complete-symbol'
941 *** `minibuffer-completion-contents'
942 *** `isearch-nonincremental-exit-minibuffer'
943 *** `isearch-filter-visible'
944 *** `generic-make-keywords-list'
946 ** `with-wrapper-hook' is obsoleted by `add-function'.
947 The few hooks that used with-wrapper-hook are replaced as follows:
948 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
949 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
950 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
952 ** `byte-compile-interactive-only-functions' is now obsolete.
953 It has been replaced by the symbol property 'interactive-only.
955 ** `split-string' now takes an optional argument TRIM.
956 The value, if non-nil, is a regexp that specifies what to trim from
957 the start and end of each substring.
959 ** New function `string-suffix-p'.
961 ** `get-upcase-table' is obsoleted by the new `case-table-get-table'.
963 ** File-handling changes
965 *** Support for filesystem notifications.
966 Emacs now supports notifications of filesystem changes, such as
967 creation, modification, and deletion of files. This requires the
968 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
969 MS-Windows systems, this is supported for Windows XP and newer
972 *** The 9th element returned by `file-attributes' is now unspecified.
973 Formerly, it was t if the file's gid would change if file were deleted
974 and recreated. This value has been inaccurate for years on many
975 platforms, and nobody seems to have noticed or cared.
977 *** The 6th argument to `copy-file' has been renamed to
978 PRESERVE-EXTENDED-ATTRIBUTES as it now handles both SELinux context
981 *** The function `file-ownership-preserved-p' now has an optional
982 argument GROUP which causes it check for file group too. This can be
983 used in place of the 9th element of `file-attributes'.
986 *** The function `set-visited-file-modtime' now accepts a 0 or -1
987 argument, with the same interpretation as the returned value of
988 `visited-file-modtime'.
990 ** Changes in autorevert.el
993 *** If Emacs is compiled with file notification support, notifications
994 are used instead of checking the time stamp of the files. You can
995 disable this by setting the user option `auto-revert-use-notify' to
996 nil. Alternatively, a regular expression of directories to be
997 excluded from file notifications can be specified by
998 `auto-revert-notify-exclude-dir-regexp'.
1001 *** The new user option `auto-revert-remote-files' enables reversion
1002 of remote files when set to non-nil.
1006 *** The function `face-spec-set' is now analogous to `setq' for face specs.
1007 Its third arg now accepts values specifying exactly which face spec to
1008 set (defface, custom, or user spec), and it directly sets the relevant
1009 property using the supplied face spec.
1011 *** New function `add-face-text-property', which can be used to
1012 conveniently prepend/append new face properties.
1014 *** Face specs set via Custom themes now replace the `defface' spec
1015 rather than inheriting from it (as do face specs set via Customize).
1017 *** New face characteristic (supports :underline (:style wave))
1018 specifies whether or not the terminal can display a wavy line.
1020 *** New face spec attribute :distant-foreground
1021 specifies foreground to use if background color is near the foreground
1022 color that would otherwise have been used.
1027 *** `image-animated-p' is now `image-multi-frame-p'.
1028 It returns non-nil for any image that contains multiple frames,
1029 whether or not it specifies a frame delay.
1032 *** When animating images that do not specify a frame delay,
1033 Emacs uses `image-default-frame-delay'.
1036 *** New functions `image-current-frame' and `image-show-frame' for getting
1037 and setting the current frame of a multi-frame image.
1039 *** You can change the speed of animated images.
1043 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1044 **** object-name -> eieio-object-name
1045 **** object-class -> eieio-object-class
1046 **** object-class-fast -> eieio--object-class
1047 **** object-name-string -> eieio-object-name-string
1048 **** object-num-slots -> eieio--object-num-slots
1049 **** object-set-name-string -> eieio-object-set-name-string
1050 **** class-parent -> eieio-class-parent
1051 **** class-parents -> eieio-class-parents
1052 **** class-children -> eieio-class-children
1053 **** class-num-slots -> eieio--class-num-slots
1054 **** class-precedence-list -> eieio-class-precedence-list
1055 **** All generated class-* and object-* field accessors are now
1056 prefixed with `eieio-' as well.
1058 *** Obsoleted functions:
1060 **** class-direct-subclasses
1061 **** class-direct-superclasses
1063 ** Changes in encoding and decoding of text
1066 *** New coding-system `prefer-utf-8'.
1067 This is like `undecided' but prefers UTF-8 on decoding if the text to
1068 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1069 any non-ASCII characters are automatically encoded as UTF-8.
1072 *** New attributes of coding-systems whose type is `undecided'.
1073 Two new attributes, `:inhibit-null-byte-detection' and
1074 `:inhibit-iso-escape-detection', determine how to detect encoding of
1075 text that includes null bytes and ISO-2022 escape sequences,
1076 respectively. Each of these attributes can be either nil, zero, or
1077 t. If it is t, decoding text ignores null bytes and, respectively,
1078 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1079 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1080 text is encoded in one of the ISO-2022 encodings, such as
1081 iso-2022-7bit. If the value is zero, Emacs consults the variables
1082 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1084 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1085 UTF-8 encoding and decoding, whenever possible.
1087 These attributes are only meaningful for coding-systems of type
1088 `undecided'. (The type of a coding-system is determined by its
1089 `:coding-type' attribute and can be accessed by calling the
1090 `coding-system-type' function.)
1092 ** `time-to-seconds' is not obsolete any more.
1094 ** New functions `special-form-p' and `macrop'.
1096 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
1097 text-property on the first char.
1099 ** The `defalias-fset-function' property lets you catch calls to defalias
1100 and redirect them to your own function instead of `fset'.
1102 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1103 When you edit DIR/FILE, Emacs normally creates a symbolic link
1104 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1105 is being edited. Formerly, if there was already a non-symlink file
1106 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1107 through DIR/.#FILE.9. These fallbacks have been removed, so that
1108 Emacs now no longer locks DIR/FILE in that case.
1110 On file systems that do not support symbolic links, the lock is now a
1111 regular file with contents being what would have been in the symlink.
1113 ** New functions `group-gid' and `group-real-gid'.
1115 ** The `common-substring' argument of display-completion-list is obsolete.
1116 Either use `completion-all-completions' which already returns highlighted
1117 strings (including for partial or substring completion) or call
1118 `completion-hilit-commonality' to add the highlight.
1120 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1122 *** The package descriptor and name of global variables, constants,
1123 and functions should be separated by two hyphens if the symbol is not
1124 meant to be used by other packages.
1127 * Changes in Emacs 24.4 on Non-Free Operating Systems
1129 ** The procedure for building Emacs on MS-Windows has changed.
1130 It is now built by running the same configure script as on all other
1131 platforms. This requires the MSYS environment and MinGW development
1132 tools. See the updated instructions in nt/INSTALL for details.
1134 Using the Posix configure script and Makefile's also means a change in
1135 the directory structure of the Emacs installation on Windows. It is
1136 now the same as on GNU and Unix systems. In particular, the auxiliary
1137 programs, such as cmdproxy.exe and hexl.exe, are in
1138 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1139 version), version-independent site-lisp is in share/emacs/site-lisp,
1140 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1141 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1142 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1143 directories and will find the files in there automatically; there's no
1144 need to set any variables due to this change.)
1147 ** Emacs on Windows 2000 and later can now access files and directories
1148 whose names cannot be encoded in the current system codepage.
1150 The new variable `w32-unicode-filenames' controls this feature: if it
1151 is t, Emacs uses Unicode APIs to pass file names to system calls,
1152 which lifts the limitation of file names to the current locale.
1155 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1156 The backtrace is written to the 'emacs_backtrace.txt' file in the
1157 directory where Emacs was running.
1160 ** The variable `buffer-file-type' is no longer supported.
1161 Setting it has no effect, and %t in the mode-line format is ignored.
1162 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1163 modifying it has no effect.
1166 ** Lock files now work on MS-Windows.
1167 This allows to avoid losing your edits if the same file is being
1168 edited in another Emacs session or by another user. See the node
1169 "Interlocking" in the Emacs User Manual for the details. To disable
1170 file locking, customize `create-lockfiles' to nil.
1172 ** Improved fullscreen support on Mac OS X.
1173 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1174 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1175 native is the default.
1177 ** OSX >= 10.7 can use sRGB colorspace.
1178 Customize `ns-use-srgb-colorspace' to change style. nil is the default.
1179 Note: This does not apply to images.
1182 * Installation Changes in Emacs 24.3
1184 ** The default X toolkit is now Gtk+ version 3.
1185 If you don't pass `--with-x-toolkit' to configure, or if you use
1186 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1187 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1188 You can explicitly require a specific version by passing
1189 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1191 ** New configure option `--enable-link-time-optimization', to utilize
1192 an appropriate feature provided by GCC since version 4.5.0.
1194 ** New configure option `--without-all' to disable most of the optional
1195 features (image support, etc.) that are normally enabled by default.
1197 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1198 Emacs). If building with GCC, this enables compile-time checks that
1199 warn/give errors about possibly-questionable C code. On a recent GNU
1200 system there should be no warnings; on older and on non-GNU systems
1201 the results may be useful to developers.
1203 ** The configure option `--enable-use-lisp-union-type' has been
1204 renamed to `--enable-check-lisp-object-type', as the resulting
1205 Lisp_Object type no longer uses a union to implement the compile time
1206 check that this option enables.
1208 ** The configure option `--disable-maintainer-mode' has been removed,
1209 as it was confusingly-named and rarely useful.
1211 ** The configure options `--program-prefix', `--program-suffix', and
1212 `--program-transform-name' apply to more than just the installed
1213 binaries. Now they also affect the man pages, icons, and the
1214 etc/emacs.desktop file; but not the info pages, since this would break
1215 links between the various manuals.
1217 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1218 overwriting "emacs" in the installation bin/ directory with a link
1221 ** Emacs uses libtinfo in preference to libncurses, if available.
1223 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1224 /usr/pkg/lib to the linker search path. You must add them yourself if
1227 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1228 (from the bin and libexec directories, respectively). The former is
1229 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1232 * Startup Changes in Emacs 24.3
1234 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1235 lisp/ directory. There should not be any there anyway. If you have
1236 been adding them there, put them somewhere else; e.g., site-lisp.
1238 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1241 * Changes in Emacs 24.3
1245 *** `C-h f' (`describe-function') can now perform autoloading.
1246 When this command is called for an autoloaded function whose docstring
1247 contains a key substitution construct, that function's library is
1248 automatically loaded, so that the documentation can be shown
1249 correctly. To disable this, set `help-enable-auto-load' to nil.
1251 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1252 even after their associated libraries have been loaded (and the
1253 autoloads have been redefined as functions).
1257 *** Images displayed via ImageMagick now support transparency and the
1258 :background image specification property.
1260 *** When available, ImageMagick support is automatically enabled.
1261 It is no longer necessary to call `imagemagick-register-types'
1262 explicitly to install ImageMagick image types; that function is called
1263 automatically at startup, or when customizing an imagemagick- option.
1265 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1266 ImageMagick to view images. (You must call `imagemagick-register-types'
1267 afterwards if you do not use customize to change this.)
1269 *** The new variable `imagemagick-enabled-types' also affects which
1270 ImageMagick types are treated as images. The function
1271 `imagemagick-filter-types' returns the list of types that will be
1274 *** ImageMagick images now support the :max-width and :max-height
1277 *** Some data types aren't auto-detected by ImageMagick. Adding
1278 :format to `create-image' may help if the content type is in the
1279 new variable `image-format-suffixes'.
1283 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1284 next and previous path separator, respectively.
1286 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1287 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1288 non-nil before enabling the mode.
1292 *** New option `mode-line-default-help-echo' specifies the help text
1293 (shown in a tooltip or in the echo area) for any part of the mode line
1294 that does not have its own specialized help text.
1296 *** You can now click mouse-3 in the coding system indicator to invoke
1297 `set-buffer-file-coding-system'.
1299 ** Server and client
1301 *** emacsclient now obeys string values for `initial-buffer-choice',
1302 if it is told to open a new frame without specifying any file to visit
1303 or expression to evaluate.
1305 *** New option `server-auth-key' specifies a shared server key.
1307 ** Emacs now generates backtraces on fatal errors.
1308 On encountering a fatal error, Emacs now outputs a textual description
1309 of the fatal signal, and a short backtrace on platforms like glibc
1310 that support backtraces.
1312 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1313 This minor mode replaces `toggle-read-only', which is now obsolete.
1315 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1316 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1317 respectively, without exiting from the prompt.
1319 ** In the Package Menu, newly-available packages are listed as "new",
1320 and sorted above the other "available" packages by default.
1322 ** If your Emacs was built from a bzr checkout, the new variable
1323 `emacs-bzr-version' contains information about the bzr revision used.
1325 ** New option `create-lockfiles' specifies usage of lockfiles.
1326 It defaults to t. Changing it to nil inhibits the creation of lock
1327 files (use this with caution).
1329 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1330 variables on remote hosts.
1332 ** The entry for PCL-CVS has been removed from the Tools menu.
1333 The PCL-CVS commands are still available via the keyboard.
1335 ** Using "unibyte: t" in Lisp source files is obsolete.
1336 Use "coding: raw-text" instead.
1338 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1339 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1340 The previous binding, introduced in Emacs 24.1, was a mistake, because
1341 `C-c LETTER' bindings are reserved for user customizations.
1343 ** Internationalization
1345 *** New language environment: Persian.
1347 *** New input method `vietnamese-vni'.
1349 ** Nextstep (GNUstep / Mac OS X) port
1351 *** Support for fullscreen and the frame parameter fullscreen.
1353 *** A file dialog is used for open/save operations initiated from the
1357 * Editing Changes in Emacs 24.3
1359 ** Search and Replace
1361 *** Non-regexp Isearch now performs "lax" space matching.
1362 Each sequence of spaces in the supplied search string may match any
1363 sequence of one or more whitespace characters, as specified by the
1364 variable `search-whitespace-regexp'. (This variable is also used by a
1365 similar existing feature for regexp Isearch.)
1367 *** New Isearch command `M-s SPC' toggles lax space matching.
1368 This applies to both ordinary and regexp Isearch.
1370 *** New option `replace-lax-whitespace'.
1371 If non-nil, `query-replace' uses flexible whitespace matching too.
1374 *** Global `M-s _' starts a symbol (identifier) incremental search,
1375 and `M-s _' in Isearch toggles symbol search mode.
1376 `M-s c' in Isearch toggles search case-sensitivity.
1378 ** Navigation commands
1380 *** New binding `M-g c' for `goto-char'.
1382 *** New binding `M-g TAB' for `move-to-column'.
1384 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1385 interactively with no prefix arg. Previously, it moved to column 1.
1387 ** New option `yank-handled-properties' allows processing of text
1388 properties on yanked text, in ways that are more general than just
1389 removing them (as is done by `yank-excluded-properties').
1391 ** New option `delete-trailing-lines' specifies whether
1392 M-x delete-trailing-whitespace should delete trailing lines at the end
1393 of the buffer. It defaults to t.
1395 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1397 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1398 `ucs-insert' is now an obsolete alias for `insert-char'.
1400 ** The `z' key no longer has a binding in most special modes.
1401 It used to be bound to `kill-this-buffer', but `z' is too easy to
1404 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1405 It copies the region-rectangle as the last rectangle kill.
1409 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1411 *** New option `register-separator' specifies the register containing
1412 the text to put between collected texts for use with
1413 M-x append-to-register and M-x prepend-to-register.
1416 * Changes in Specialized Modes and Packages in Emacs 24.3
1418 ** Common Lisp emulation (CL)
1420 *** CL's main entry is now (require 'cl-lib).
1421 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1422 i.e., all its definitions have the "cl-" prefix (and internal definitions
1423 use the "cl--" prefix).
1425 If `cl' provided a feature under the name `foo', then `cl-lib'
1426 provides it under the name `cl-foo' instead; with the exceptions of the
1427 few `cl' definitions that had to use `foo*' to avoid conflicts with
1428 pre-existing Elisp entities. These have been renamed to `cl-foo'
1429 rather than `cl-foo*'.
1431 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1432 provide the old, non-prefixed names. Some exceptions are listed below:
1434 *** `cl-flet' is not like `flet' (which is deprecated).
1435 Instead it obeys the behavior of Common-Lisp's `flet'.
1436 In particular, in cl-flet function definitions are lexically scoped,
1437 whereas in flet the scoping is dynamic.
1439 *** `cl-labels' is slightly different from `labels'.
1440 The difference is that it relies on the `lexical-binding' machinery
1441 (as opposed to the `lexical-let' machinery used previously) to capture
1442 definitions in closures, so such closures will only work if `lexical-binding'
1445 *** `cl-letf' is not exactly like `letf'.
1446 The only difference is in details that relate to some deprecated usage
1447 of `symbol-function' in place forms.
1449 *** `progv' was rewritten to use the `let' machinery.
1450 A side effect is that variables without corresponding values are bound
1451 to nil rather than being made unbound.
1453 *** The following methods of extending `setf' are obsolete
1454 (use features from gv.el instead):
1455 `define-modify-macro' (use `gv-letplace')
1456 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1457 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1458 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1462 *** Changes are now highlighted using the same color scheme as in
1463 modern VCSes. Deletions are displayed in red (new faces
1464 `diff-refine-removed' and `smerge-refined-removed', and new definition
1465 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1466 and `smerge-refined-added', and new definition of `diff-added').
1468 *** The variable `diff-use-changed-face' defines whether to use the
1469 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1470 changes in context diffs.
1472 *** The new command `diff-delete-trailing-whitespace' removes trailing
1473 whitespace introduced by a diff.
1475 ** Ediff now uses the same color scheme as Diff mode.
1479 A new version of python.el, which provides several new features, including:
1480 per-buffer shells, better indentation, Python 3 support, and improved
1481 shell-interaction compatible with iPython (and virtually any other
1484 *** Some user options have been replaced/renamed, including (old -> new):
1485 **** python-indent -> python-indent-offset
1486 **** python-guess-indent -> python-indent-guess-indent-offset
1487 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1488 **** python-use-skeletons -> python-skeleton-autoinsert
1490 *** Some user options have been removed, including:
1492 **** `python-indent-string-contents': Strings are never indented.
1494 **** `python-honour-comment-indentation':
1495 Comments are always considered as indentation markers.
1497 **** `python-continuation-offset': Indentation is automatically
1498 calculated in a pep8 compliant way depending on the context.
1500 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1501 Have no direct mapping as the shell interaction is completely different.
1503 **** `python-python-command', `python-jython-command':
1504 Replaced by `python-shell-interpreter'.
1506 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1507 `python-pdbtrack-minor-mode-string', `python-source-modes':
1510 *** Some commands have been replaced (old -> new):
1511 **** python-insert-class -> python-skeleton-class
1512 **** python-insert-def -> python-skeleton-def
1513 **** python-insert-for -> python-skeleton-for
1514 **** python-insert-if -> python-skeleton-if
1515 **** python-insert-try/except -> python-skeleton-try
1516 **** python-insert-try/finally -> python-skeleton-try
1517 **** python-insert-while -> python-skeleton-while
1518 **** python-find-function -> python-nav-jump-to-defun
1519 **** python-next-statement -> python-nav-forward-sentence
1520 **** python-previous-statement -> python-nav-backward-sentence
1521 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1522 **** python-end-of-defun-function -> python-nav-end-of-defun
1523 **** python-send-buffer -> python-shell-send-buffer
1524 **** python-send-defun -> python-shell-send-defun
1525 **** python-send-region -> python-shell-send-region
1526 **** python-send-region-and-go -> emulate with python-shell-send-region
1527 and python-shell-switch-to-shell
1528 **** python-send-string -> python-shell-send-string
1529 **** python-switch-to-python -> python-shell-switch-to-shell
1530 **** python-describe-symbol -> python-eldoc-at-point
1534 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1536 *** The D-Bus object manager interface is implemented.
1538 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1539 if their value does not fit into Emacs's integer range.
1541 *** The function `dbus-call-method' is now non-blocking.
1542 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1544 *** Signals can also be sent as unicast messages.
1546 *** The argument list of `dbus-register-signal' has been extended,
1547 according to the new match rule types of D-Bus.
1549 *** `dbus-init-bus' supports private connections.
1551 *** There is a new function `dbus-setenv'.
1553 ** `desktop-path' no longer includes the "." directory.
1554 Desktop files are now located in ~/.emacs.d by default.
1558 *** `dired-do-async-shell-command' executes each file sequentially
1559 if the command ends in `;' (when operating on multiple files).
1560 Otherwise, it executes the command on each file in parallel.
1562 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1563 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1566 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1567 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1568 mark/unmark/flag all files in the active region.
1570 *** The minibuffer default for `=' (`dired-diff') has changed.
1571 It is now the backup file for the file at point, if one exists.
1572 In Transient Mark mode the default is the file at the active mark.
1574 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1575 The global binding for `M-=', `count-words-region' is in effect.
1579 *** New module "notifications", which can send a notification when you
1580 receive a private message or your nickname is mentioned.
1582 *** ERC will look up server/channel names via auth-source and use any
1585 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1586 only applies to messages sent by lurkers.
1588 ** reStructuredText mode
1590 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1591 fontification, comment handling, and customization have all been revised
1594 *** Support for `imenu' and `which-function-mode'.
1596 *** The reStructuredText syntax is more closely covered.
1597 Sphinx support has been improved.
1599 *** `rst-insert-list' inserts new list or continues existing lists.
1601 *** A negative prefix argument always works for `rst-adjust'.
1603 *** The window configuration is reset after displaying a TOC.
1605 *** The constant `rst-version' describes the rst.el package version.
1609 *** Support for percent literals and recognition of regular expressions
1610 in method calls without parentheses with more methods, including Cucumber
1613 *** Improved syntax highlighting and indentation.
1615 *** New command `ruby-toggle-block', bound to `C-c {'.
1617 *** Some non-standard keybindings/commands have been removed:
1619 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1621 **** `ruby-mark-defun'; use `mark-defun'.
1623 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1624 appropriate settings for the variables `beginning-of-defun-function'
1625 and `end-of-defun-function'.
1627 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1628 `reindent-then-newline-and-indent' and `newline' have been removed.
1630 ** Shell Script mode
1632 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1634 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1636 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1640 *** The free software compiler GHDL is supported (and now the default).
1642 *** Support for the VHDL-AMS packages has been added/updated.
1644 *** Updated to the 2002 revision of the VHDL standard.
1646 *** Accepts \r and \f as whitespace.
1650 *** The faces used by Apropos are now directly customizable.
1651 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1652 see the `apropos' Custom group for details.
1654 *** The old options whose values specified faces to use have been removed
1655 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1659 *** This package has been rewritten to use Tabulated List mode.
1661 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1662 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1666 *** Algebraic simplification mode is now the default.
1667 To restrict to the limited simplifications given by the former
1668 default simplification mode, use `m I'.
1672 *** You can customize the header text that appears above each calendar month.
1673 See the variable `calendar-month-header'.
1675 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1677 *** The calendars produced by cal-html include holidays.
1678 Customize `cal-html-holidays' to change this.
1682 *** The major modes from the parser generators "Bovine" and "Wisent"
1683 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1684 are in `auto-mode-alist', and the corresponding manuals are included.
1688 **** Menu support for the "Configuration" feature. This allows users to
1689 choose the active configuration (such as debug or install) from the menu.
1691 **** New command `ede-set' to interactively set project-local variables.
1693 **** Support for compiling, debugging, and running in "generic" projects.
1695 **** Autoconf editing support for M4 macros with complex arguments.
1697 **** Compilation support for the "linux" project type.
1699 **** "simple" projects have been removed; use "generic" projects instead.
1703 **** Support for parsing #include statements inside a namespace in C/C++.
1705 **** Improved support for 'extern "C"' declarations in C/C++.
1707 **** The ability to ignore more common special C/C++ preprocessor symbols,
1708 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1709 If available, include cdefs.h as an additional source of preprocessor symbols.
1711 **** Improved C/C++ function pointer parsing.
1713 **** In Python, support for converting imports to include file names.
1715 **** Ability to dynamically determine the Python load path.
1717 **** Support for the Python 'WITH' and 'AT' keywords.
1719 **** Improved tooltip completion.
1723 **** The SRecode manual is now included.
1725 **** Tag generation supports constructor/destructor settings and system
1726 include differentiation.
1728 **** Addition of 'Framework' support: Frameworks are specified when a
1729 particular kind of library (such as Android) is needed in a common language
1732 **** Support for nested templates and let variables override based on priority.
1734 **** Support for merging tables from multiple related modes, such as
1735 default -> c++ -> arduino.
1737 ** Compile has a new option `compilation-always-kill'.
1741 *** `custom-reset-button-menu' now defaults to t.
1743 *** Non-option variables are never matched in `customize-apropos' and
1744 `customize-apropos-options' (i.e., the prefix argument does nothing for
1745 these commands now).
1749 *** The variables `term-default-fg-color' and `term-default-bg-color'
1750 are now deprecated in favor of the customizable face `term'.
1752 *** You can customize how to display ANSI terminal colors and styles
1753 by customizing the corresponding `term-color-<COLOR>',
1754 `term-color-underline' and `term-color-bold' faces.
1758 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1760 *** Remote processes are now also supported on remote MS-Windows hosts.
1764 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1765 Previously, this slot stored semicolon-separated attribute-value pairs
1766 appended to some imap URLs, but this is not compatible with RFC 3986.
1767 So now the `filename' slot stores the entire path and query components,
1768 and the `attributes' slot is always nil.
1770 *** New function `url-encode-url' for encoding a URI string.
1771 The `url-retrieve' function now uses this to encode its URL argument,
1772 in case that is not properly encoded.
1774 *** New command `url-cookie-list' displays all the current cookies, and
1775 allows deleting selected cookies.
1777 ** notifications.el supports now version 1.2 of the Notifications API.
1778 The function `notifications-get-capabilities' returns the supported
1781 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1782 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1783 `flymake-warning-bitmap'.
1785 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1786 specifying URL types that should be converted to remote file names at
1787 the FFAP prompt. The default is now '("ftp").
1789 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1790 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1792 ** New option `mouse-avoidance-banish-position' specifies where the
1793 `banish' mouse avoidance setting moves the mouse.
1795 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1796 closing brackets to be aligned with the line of the opening bracket.
1798 ** In Proced mode, new command `proced-renice' renices marked processes.
1800 ** New option `async-shell-command-buffer' specifies the buffer to use
1801 for a new asynchronous `shell-command' when the default output buffer
1802 `*Async Shell Command*' is already in use.
1804 ** SQL mode has a new option `sql-db2-escape-newlines'.
1805 If non-nil, newlines sent to the command interpreter will be escaped
1806 by a backslash. The default does not escape the newlines and assumes
1807 that the sql statement will be terminated by a semicolon.
1809 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1810 (and modes that derive from it), sorts the column at point, or the Nth
1811 column if a numeric prefix argument is given.
1813 ** `which-func-modes' now defaults to t, so Which Function mode, when
1814 enabled, applies to all applicable major modes.
1816 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1819 ** Follow mode no longer works by using advice.
1820 The option `follow-intercept-processes' has been removed.
1822 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1824 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1825 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1826 *** semantic-change-hooks -> semantic-change-functions
1827 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1828 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1829 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1830 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1831 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1832 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1833 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1834 *** rcirc-activity-hooks -> rcirc-activity-functions
1835 *** rcirc-print-hooks -> rcirc-print-functions
1836 *** dbus-event-error-hooks -> dbus-event-error-functions
1837 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1838 *** checkdoc-style-hooks -> checkdoc-style-functions
1839 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1840 *** archive-extract-hooks -> archive-extract-hook
1841 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1842 *** hfy-post-html-hooks -> hfy-post-html-hook
1843 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1844 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1845 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1846 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1848 ** Obsolete packages
1851 In most cases, assoc+member+push+delq work just as well.
1852 And in any case it's just a terrible package: ugly semantics, terrible
1853 inefficiency, and not namespace-clean.
1862 * Incompatible Lisp Changes in Emacs 24.3
1864 ** Docstrings starting with `*' no longer indicate user options.
1865 Only variables defined using `defcustom' are considered user options.
1866 The function `user-variable-p' is now an obsolete alias for
1867 `custom-variable-p'.
1869 ** The return values of `defalias', `defun' and `defmacro' have changed,
1870 and are now undefined. For backwards compatibility, `defun' and
1871 `defmacro' currently return the name of the newly defined
1872 function/macro, but this should not be relied upon.
1874 ** `random' by default now returns a different random sequence in
1875 every Emacs run. Use `(random S)', where S is a string, to set the
1876 random seed to a value based on S, in order to get a repeatable
1877 sequence in later calls.
1879 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1880 that substring is inserted literally even if the LITERAL arg is
1881 non-nil, instead of causing an error to be signaled.
1883 ** `select-window' now always makes the window's buffer current.
1884 It does so even if the window was selected before.
1886 ** The function `x-select-font' can return a font spec, instead of a
1887 font name as a string. Whether it returns a font spec or a font name
1888 depends on the graphical library.
1890 ** `face-spec-set' no longer sets frame-specific attributes when the
1891 third argument is a frame (that usage was obsolete since Emacs 22.2).
1893 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1895 ** The CL package's `get-setf-method' function no longer exists.
1896 Generalized variables are now part of core Emacs Lisp, and implemented
1897 differently to the way cl.el used to do it. It is not possible to
1898 define a compatible replacement for `get-setf-method'. See the file
1899 gv.el for internal details of the new implementation.
1901 ** The arguments of `dbus-register-signal' are no longer just strings,
1902 but keywords or keyword-string pairs. The old argument list will
1903 still be supported for Emacs 24.x.
1905 ** Miscellaneous name changes
1906 Some Lisp symbols have been renamed to correct their spelling,
1907 or to be more consistent with standard Emacs terminology.
1909 *** Renamed functions
1910 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1911 **** inactivate-input-method -> deactivate-input-method
1912 **** quail-inactivate -> quail-deactivate
1913 **** robin-inactivate -> robin-deactivate
1914 **** viper-inactivate-input-method -> viper-deactivate-input-method
1915 **** viper-inactivate-input-method-action ->
1916 viper-deactivate-input-method-action
1917 **** ucs-input-inactivate -> ucs-input-deactivate
1920 The old hooks are still supported for backward compatibility, but they
1921 are deprecated and will be removed eventually.
1922 **** input-method-inactivate-hook -> input-method-deactivate-hook
1923 **** robin-inactivate-hook -> robin-deactivate-hook
1924 **** quail-inactivate-hook -> quail-deactivate-hook
1926 *** Renamed variables
1927 **** follow-deactive-menu -> follow-inactive-menu
1928 **** inactivate-current-input-method-function ->
1929 deactivate-current-input-method-function
1931 ** Some obsolete functions, variables, and faces have been removed:
1932 *** `last-input-char', `last-command-char', `unread-command-char'
1933 *** `facemenu-unlisted-faces'
1934 *** `rmail-decode-mime-charset'
1935 *** `iswitchb-read-buffer'
1936 *** `sc-version', `sc-submit-bug-report'
1937 *** `set-char-table-default'
1938 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
1939 *** `compile-internal'
1941 *** `mode-line-inverse-video'
1942 *** `follow-mode-off-hook'
1943 *** `cvs-commit-buffer-require-final-newline'
1944 (use `log-edit-require-final-newline' instead)
1945 *** `cvs-changelog-full-paragraphs'
1946 (use `log-edit-changelog-full-paragraphs' instead)
1947 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1948 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1949 *** `vc-master-templates' (use `vc-handled-backends' instead)
1950 *** `vc-checkout-carefully'
1953 * Lisp Changes in Emacs 24.3
1955 ** CL-style generalized variables are now in core Elisp.
1956 `setf' is autoloaded; `push' and `pop' accept generalized variables.
1957 You can define your own generalized variables using `gv-define-simple-setter',
1958 `gv-define-setter', etc.
1960 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1961 This can significantly speed up execution of non-byte-compiled code,
1962 but can also bump into previously unnoticed cyclic dependencies.
1963 These are generally harmless: they will simply cause the macro calls
1964 to be left for later expansion (as before), but will result in a
1965 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1966 You may wish to restructure your code so this does not happen.
1968 ** New sampling-based Elisp profiler.
1969 Try M-x profiler-start, do some work, and then call M-x profiler-report.
1970 When finished, use M-x profiler-stop. The sampling rate can be based on
1971 CPU time or memory allocations.
1973 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1974 The interpretation of the DECLS is determined by `defun-declarations-alist'.
1976 ** New macros `setq-local' and `defvar-local'.
1978 ** Face underlining can now use a wave.
1980 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
1981 of `read-regexp' accepts a string ending with a colon and space, and its
1982 second argument DEFAULTS can be a list of strings accessible via `M-n'
1983 in the minibuffer ahead of other hard-coded useful regexp-related values.
1984 More commands use `read-regexp' now to read their regexp arguments.
1988 *** New function `completion-table-with-quoting' to handle completion
1989 in the presence of quoting, such as file completion in shell buffers.
1991 *** New function `completion-table-subvert' to use an existing completion
1992 table, but with a different prefix.
1996 *** New error type and new function `user-error'.
1997 These do not trigger the debugger.
1999 *** New option `debugger-bury-or-kill', saying what to do with the
2000 debugger buffer when exiting debug.
2002 *** Set `debug-on-message' to enter the debugger when a certain
2003 message is displayed in the echo area. This can be useful when trying
2004 to work out which code is doing something.
2006 *** New var `inhibit-debugger', automatically set to prevent accidental
2007 recursive invocations.
2011 *** New command `fit-frame-to-buffer' adjusts the frame height to
2014 *** The command `fit-window-to-buffer' can adjust the frame height
2015 if the new option `fit-frame-to-buffer' is non-nil.
2017 *** New macro `with-temp-buffer-window', similar to
2018 `with-output-to-temp-buffer'.
2020 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2023 *** New option `switch-to-buffer-preserve-window-point' to restore a
2024 window's point when switching buffers.
2026 *** New display action function `display-buffer-no-window' to not
2027 display the buffer in a window.
2029 *** New display action alist entry `allow-no-window' to indicate the
2030 caller of `display-buffer' is ready to handle the case of not
2031 displaying the buffer in a window.
2033 *** New display action alist entries `window-height' and `window-width'
2034 specify the size of new windows created by `display-buffer'.
2036 *** New display action alist entry `pop-up-frame-parameters', if
2037 non-nil, specifies frame parameters to give any newly-created frame.
2039 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2040 tells display action functions to avoid changing which frame is
2043 *** New display action alist entry `previous-window', if non-nil,
2044 specifies window to reuse in `display-buffer-in-previous-window'.
2046 *** New display action functions `display-buffer-below-selected',
2047 and `display-buffer-in-previous-window'.
2049 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2050 now accept a third argument to avoid choosing the selected window.
2052 *** Additional values recognized for option `window-combination-limit'.
2054 *** The following variables are obsolete, as they can be replaced by
2055 appropriate entries in the `display-buffer-alist' function introduced
2057 **** `dired-shrink-to-fit'
2058 **** `display-buffer-reuse-frames'
2059 **** `display-buffer-function'
2060 **** `special-display-buffer-names'
2061 **** `special-display-frame-alist'
2062 **** `special-display-function'
2063 **** `special-display-regexps'
2067 *** `current-time-string' no longer requires that its argument's year
2068 must be in the range 1000..9999. It now works with any year supported
2069 by the underlying C implementation.
2071 *** `current-time' now returns extended-format time stamps
2072 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2073 PSEC is typically a multiple of 1000 on current machines. Other
2074 functions that use this format, such as `file-attributes' and
2075 `format-time-string', have been changed accordingly. Old-format time
2076 stamps are still accepted.
2078 *** The format of timers in `timer-list' and `timer-idle-list' is now
2079 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2080 The PSECS slot is new, and uses picosecond resolution. It can be
2081 accessed via the new `timer--psecs' accessor.
2083 *** Last-modified time stamps in undo lists now are of the form
2084 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2088 *** Improved security when handling persistent objects:
2090 **** `eieio-persistent-read' now features optional arguments for specifying
2091 the class to load, as well as a flag stating whether subclasses are allowed;
2092 if provided, other classes will be rejected by the reader. For
2093 compatibility with existing code, if the class is omitted only a
2096 **** New specialized reader for pulling in classes and signaling errors
2097 without evaluation of suspicious code.
2099 **** All slots that contain objects must have a :type. Slots with lists
2100 of objects must use a new type predicate for a list of an object type.
2102 *** Support for `find-function' and similar utilities, through the addition
2103 of filename support to generated symbols.
2105 ** Floating point functions now always return special values like NaN,
2106 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2107 Previously, they returned NaNs on some platforms but signaled errors
2108 on others. The affected functions are acos, asin, tan, exp, expt,
2109 log, log10, sqrt, and mod.
2111 ** New fringe bitmap `exclamation-mark'.
2113 ** Miscellaneous changes to special forms and macros
2115 *** `defun' and `defmacro' are now macros rather than special forms.
2117 *** `kbd' is now a function rather than a macro.
2119 ** Miscellaneous new functions
2121 *** `set-temporary-overlay-map' sets up a temporary keymap that
2122 takes precedence over most other maps for a short while (normally one key).
2124 *** `autoloadp' tests if its argument is an autoloaded object.
2126 *** `autoload-do-load' performs the autoloading operation.
2128 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2130 *** `file-name-base' returns a file name sans directory and extension.
2132 *** `function-get' fetches a function property, following aliases.
2134 *** `posnp' tests if an object is a `posn'.
2136 *** `system-users' returns the user names on the system.
2138 *** `system-groups' returns the group names on the system.
2140 *** `tty-top-frame' returns the topmost frame of a text terminal.
2142 ** The following functions and variables are obsolete:
2143 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2144 *** `buffer-has-markers-at'
2145 *** `macro-declaration-function' (use `macro-declarations-alist')
2146 *** `window-system-version' (provides no useful information)
2147 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2148 *** `query-replace-interactive'
2149 *** `font-list-limit' (has had no effect since Emacs < 23)
2152 * Changes in Emacs 24.3 on Non-Free Operating Systems
2154 ** Cygwin builds can use the native MS Windows user interface.
2155 Pass `--with-w32' to configure. The default remains the X11 interface.
2157 ** Two new functions are available in Cygwin builds:
2158 `cygwin-convert-file-name-from-windows' and
2159 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2160 code to access the Cygwin file-name mapping machinery to convert
2161 between Cygwin and Windows-native file and directory names.
2163 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2164 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2165 `mouse-autoselect-window'.
2167 ** On MS Windows Vista and later Emacs now supports symbolic links.
2169 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2170 support for libxml2, even if its presence is detected.
2172 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2174 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2175 directories to the search path. You must add them yourself if you want them.
2178 * Changes in Emacs 24.2
2180 ** This is mainly a bug-fix release.
2183 * Installation Changes in Emacs 24.1
2185 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2186 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2187 also depend on Gtk+. You can disable them with --without-rsvg and
2190 ** Emacs can be compiled with GnuTLS support.
2191 This happens by default if a suitably recent version of the library is
2192 found at build time. To prevent this, use the configure option
2193 `--without-gnutls'. See below for GnuTLS features.
2195 ** Emacs can be compiled with SELinux support.
2196 This happens by default if a suitably recent version of the library is
2197 found at build time. To prevent this, use the configure option
2198 `--without-selinux'. See below for SELinux features.
2200 ** Emacs can be compiled with ImageMagick support.
2201 This happens by default if a suitably recent version of the library is
2202 found at build time. To prevent this, use the configure option
2203 `--without-imagemagick'. See below for ImageMagick features.
2204 This feature is not available for the Nextstep or MS ports.
2206 ** Emacs can be compiled with libxml2 support.
2207 This happens by default if a suitably recent version of the library is
2208 found at build time. To prevent this, use the configure option
2209 `--without-xml2'. See below for libxml2 features.
2211 ** By default, the installed Info and man pages are compressed.
2212 You can disable this by configuring --without-compress-info.
2214 ** New configure option --with-wide-int.
2215 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2216 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2219 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2220 These provide no new functionality, they just remove the need to edit
2221 lib-src/Makefile by hand in order to use the associated features.
2223 ** New configure option --enable-use-lisp-union-type.
2224 This is only useful for Emacs developers to debug certain types of bugs.
2225 This is not a new feature; only the configure flag is new.
2227 ** The standalone programs digest-doc and sorted-doc are removed.
2228 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2230 ** The standalone program `fakemail' is removed.
2231 If you need it, feedmail.el provides a superset of the functionality.
2234 * Startup Changes in Emacs 24.1
2236 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2237 command line arguments, and the EMACS_UNIBYTE environment variable, no
2238 longer have any effect. (They were declared obsolete in Emacs 23.)
2240 ** New command line option `--no-site-lisp' removes site-lisp directories
2241 from load-path. -Q now implies this. This option does not affect the
2242 EMACSLOADPATH environment variable (and hence has no effect for
2246 * Changes in Emacs 24.1
2250 *** Many packages now use the `completion-at-point' command,
2251 rather than implementing separate completion commands.
2253 *** `completion-at-point' now handles tags and semantic completion.
2255 *** Completion in a non-minibuffer now tries to detect the end of completion
2256 and pops down the *Completions* buffer accordingly.
2258 *** New option `completion-cycle-threshold' allows completion cycling.
2260 *** New option `completion-category-overrides' for overriding the
2261 default completion style in certain circumstances.
2263 *** New completion style `substring'.
2265 *** Completion of buffer names uses `substring' completion by default.
2267 *** The option `widget-complete-field' has been removed.
2271 *** The first time you try sending mail, Emacs asks for a mail method.
2272 This is implemented by a new default for `send-mail-function', which
2273 is `sendmail-query-once'. This offers to use the smtpmail package, or
2274 to use the old defaults relying on external mail facilities
2275 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2276 `mailclient-send-it' on Windows).
2278 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2279 transfers the report to your desktop's preferred mail client, if there
2280 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2283 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2284 and Mail mode changes
2286 ** Emacs server and client changes
2288 *** New option `server-port' specifies the port for TCP Emacs servers.
2290 *** New emacsclient argument -q/--quiet suppresses some status messages.
2292 *** New emacsclient argument --frame-parameters specifies the frame
2293 parameters of any newly-created graphical frame.
2295 *** If emacsclient shuts down due to Emacs signaling an error,
2296 its exit status is 1.
2298 *** New emacsclient argument --parent-id ID.
2299 This opens a client frame in parent X window ID, via XEmbed, similar
2300 to the --parent-id argument to Emacs.
2302 ** Internationalization changes
2304 *** Emacs now supports display and editing of bidirectional text.
2305 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2306 displayed in the correct visual order as expected by users of those
2307 scripts. The display reordering is a "full bidirectionality" class
2308 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2309 with no RTL text should look exactly the same as before.
2311 **** New buffer-local variable `bidi-display-reordering'.
2312 To disable display reordering in a buffer, change this to nil.
2314 **** New buffer-local variable `bidi-paragraph-direction'.
2315 If nil (the default), Emacs determines the base direction of each
2316 paragraph from its text, as specified by the UBA. Setting the value
2317 to `right-to-left' or `left-to-right' forces a base direction on each
2320 Paragraphs with right-to-left base direction are displayed starting at
2321 the right window edge.
2323 *** Enhanced support for characters with no glyphs in available fonts,
2324 or, on text terminals, characters that cannot be encoded by the
2325 terminal coding system. The new option `glyphless-char-display-control'
2326 specifies how to display them: as a hexadecimal code in a box, a thin
2327 1-pixel space, an empty box, etc.
2329 *** New input methods for Farsi and Bulgarian
2330 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2332 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2333 (U+2010 and U+2011).
2335 *** New Hebrew translation of the Emacs Tutorial.
2336 Type `C-u C-h t' to choose it in case your language setup doesn't
2337 automatically select it.
2339 ** An Emacs Lisp package manager is now included.
2340 This is a convenient way to download and install additional packages,
2341 from a package repository at http://elpa.gnu.org.
2343 *** M-x list-packages shows a list of packages, which can be
2344 selected for installation.
2346 *** New command `describe-package', bound to `C-h P'.
2348 *** By default, all installed packages are loaded automatically when
2349 Emacs starts up. To disable this, set `package-enable-at-startup' to
2350 nil. To specify the packages to load, customize `package-load-list'.
2352 ** Custom theme changes
2354 *** New command `M-x customize-themes', which provides a convenient
2355 interface for enabling and disabling Custom themes.
2357 *** New option `custom-theme-load-path' is the load path for themes.
2358 Emacs no longer looks for Custom themes in `load-path'. The default
2359 value of `custom-theme-load-path' says to look for themes in
2360 `custom-theme-directory', followed by a subdirectory of
2361 `data-directory' named "themes/", which contains a small selection of
2362 built-in Custom themes.
2364 *** New option `custom-safe-themes' records known-safe theme files.
2365 If a theme is not in this list, Emacs queries before loading it, and
2366 offers to save the theme to `custom-safe-themes' automatically. By
2367 default, all themes included in Emacs are treated as safe.
2369 ** Improved GTK integration
2371 *** GTK scroll-bars are now placed on the right by default.
2372 The function `set-scroll-bar-mode' can change this.
2374 *** GTK tool bars can have just text, just images or images and text.
2375 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2376 the default is taken from desktop settings.
2378 *** GTK tool bars can be placed on any edge of the frame.
2379 The frame-parameter tool-bar-position controls this. It takes the
2380 values top, left, right or bottom. The Options => Show/Hide menu has
2383 *** The default colors for selected text (the `region' face) are taken
2384 from the GTK theme when Emacs is built with GTK.
2386 *** Emacs uses GTK tooltips by default if built with GTK.
2387 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2389 ** Graphical interface changes
2391 *** On graphical displays, the mode-line no longer ends in dashes.
2392 Also, the first dash (which does not indicate anything) is just
2393 displayed as a space.
2395 *** `menu-bar-select-buffer-function' lets you choose another operation
2396 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2398 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2399 built with Xft. These fonts can be set via X resources, for example:
2400 Emacs.pane.menubar.font: Courier-12
2404 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2405 or if it receives a SIGINT signal in batch mode.
2407 *** `kill-emacs-hook' is now also run in batch mode.
2408 Third-party code which adds to `kill-emacs-hook' should check if they
2409 do the right thing in batch mode.
2411 ** Scrolling changes
2413 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2414 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2415 of buffer at first key-press (instead they move to top/bottom of buffer)
2416 when `scroll-error-top-bottom' is non-nil.
2418 *** New option `scroll-error-top-bottom' (see above).
2420 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2421 scroll a line instead of full screen.
2423 *** New property `scroll-command' should be set on a command's symbol to
2424 define it as a scroll command affected by `scroll-preserve-screen-position'.
2426 *** If you customize `scroll-conservatively' to a value greater than 100,
2427 Emacs will never recenter point in the window when it scrolls due to
2428 cursor motion commands or commands that move point (e.f., `M-g M-g').
2429 Previously, you needed to use `most-positive-fixnum' as the value of
2430 `scroll-conservatively' to achieve the same effect.
2432 *** "Aggressive" scrolling now honors the scroll margins.
2433 If you customize `scroll-up-aggressively' or
2434 `scroll-down-aggressively' and move point off the window, Emacs now
2435 scrolls the window so as to avoid positioning point inside the scroll
2438 ** Basic SELinux support has been added.
2439 This requires Emacs to be linked with libselinux at build time.
2441 *** Emacs preserves the SELinux file context when backing up.
2442 Also, the function `copy-file' has an extra optional argument for
2443 preserving SELinux context, and the return value of `backup-buffer'
2444 now includes the SELinux context.
2446 *** New functions `file-selinux-context' and `set-file-selinux-context'
2447 get and set the SELinux context of a file.
2451 *** `delete-by-moving-to-trash' now only affects commands that specify
2452 trashing. This avoids inadvertently trashing temporary files.
2454 *** Calling `delete-file' or `delete-directory' with a prefix argument
2455 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2457 ** File- and directory-local variable changes
2459 *** You can stop directory local vars from applying to subdirectories.
2460 Add an element (subdirs . nil) to the alist portion of any variables
2461 settings to indicate that the section should not apply to
2464 *** Directory local variables can apply to some file-less buffers.
2465 Affected modes include dired, vc-dir, and log-edit. For example,
2466 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2467 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2468 `hack-dir-local-variables-non-file-buffer' to support this.
2470 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2471 Instead, use "eval: (minor-mode 1)".
2473 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2474 to `inhibit-local-variables-regexps'. As the name suggests, it now
2475 applies to ALL file local variables, not just -*- lines. The
2476 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2481 *** The `quit-window' command now restores the last buffer displayed
2482 in the quitted window.
2484 *** Resizing an Emacs frame now preserves proportional window sizes,
2485 modulo restrictions like window minimum sizes and fixed-size windows.
2487 *** The behavior of `display-buffer' is now customizable in detail.
2489 **** New option `display-buffer-base-action' specifies a list of
2490 user-determined display "actions" (functions and optional arguments
2491 for choosing the displaying window).
2493 This takes precedence over the default display action, which is
2494 specified by `display-buffer-fallback-action'.
2496 **** New option `display-buffer-alist' maps buffer name regexps to
2497 display actions, taking precedence over `display-buffer-base-action'.
2499 *** New option `window-combination-limit'.
2500 The new option `window-combination-limit' allows to return the space
2501 obtained for resizing or creating a window more reliably to the window
2502 from which such space was obtained.
2504 *** New option `window-combination-resize'.
2505 The new option `window-combination-resize' allows to split a window that
2506 otherwise cannot be split because it's too small by stealing space from
2507 other windows in the same combination. Subsequent resizing or deletion
2508 of the window will resize all windows in the same combination as well.
2510 *** New option `frame-auto-hide-function' lets you choose between
2511 iconifying or deleting a frame when burying a buffer in a dedicated
2512 frame, or quitting a window showing a buffer in a frame of its own.
2514 *** New commands `maximize-window' and `minimize-window'.
2515 These maximize and minimize the size of a window within its frame.
2517 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2518 These functions allow to navigate through the live buffers that have
2519 been shown in a specific window.
2521 ** Minibuffer changes
2523 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2524 This is handy for minibuffer-only frames, and is also used for the feature
2525 where mouse-1 pops up *Messages*"', which can now easily be changed.
2527 *** Minibuffers set `truncate-lines' to nil.
2528 If you want to change the value to something else, you could use
2529 for example `minibuffer-setup-hook'.
2531 ** `auto-mode-case-fold' is now enabled by default.
2533 ** `backup-by-copying-when-mismatch' now defaults to t.
2535 ** New basic faces `error', `warning', `success'.
2536 These are used to highlight text indicating failure, caution or
2537 successful operation.
2539 ** New option `list-colors-sort' defines the color sort order
2540 for `list-colors-display'.
2542 ** The variable `focus-follows-mouse' now always defaults to nil.
2545 * Editing Changes in Emacs 24.1
2549 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2550 `isearch-yank-line'.
2552 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2553 `isearch-yank-kill'.
2555 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2557 ** New commands `count-words-region' and `count-words'.
2559 *** M-= is bound to `count-words-region', not `count-lines-region'.
2560 The `count-words-region' command, when called interactively, reports
2561 the number of lines, words, and characters in the region. It is a
2562 superset of the old `count-lines-region', which is now an obsolete
2565 ** The command `just-one-space' (M-SPC), if given a negative argument,
2566 also deletes newlines around point.
2570 *** New option `delete-active-region'.
2571 If non-nil, [delete] and DEL delete the region if it is active and no
2572 prefix argument is given. If set to `kill', those commands kill
2575 *** New command `delete-forward-char', bound to [delete].
2576 This is meant for interactive use, and obeys `delete-active-region'.
2577 The command `delete-char' does not obey `delete-active-region'.
2579 *** `delete-backward-char' is now a Lisp function.
2580 Apart from obeying `delete-active-region', its behavior is unchanged.
2581 However, the byte compiler now warns if it is called from Lisp; Lisp
2582 callers should use delete-char with a negative argument instead.
2584 *** The option `mouse-region-delete-keys' has been deleted.
2586 ** Selection changes.
2588 The default handling of clipboard and primary selections has been
2589 changed to conform with modern X applications. In short, most
2590 commands for killing and yanking text now use the clipboard, while
2591 mouse commands use the primary selection.
2593 In the following, we provide a list of these changes, followed by a
2594 list of steps to get the old behavior back if you prefer that.
2596 *** `select-active-regions' now defaults to t.
2597 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2598 the kill ring. The selected text is put in the primary selection, if
2599 the system possesses a separate primary selection facility (e.g. X).
2601 **** `select-active-regions' also accepts a new value, `only'.
2602 This means to only set the primary selection for temporarily active
2603 regions (usually made by mouse-dragging or shift-selection);
2604 "ordinary" active regions, such as those made with C-SPC followed by
2605 point motion, do not alter the primary selection.
2607 **** `mouse-drag-copy-region' now defaults to nil.
2609 *** mouse-2 is now bound to `mouse-yank-primary'.
2610 This pastes from the primary selection, ignoring the kill-ring.
2611 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2613 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2615 *** `x-select-enable-primary' now defaults to nil.
2616 Thus, commands that kill text or copy it to the kill-ring (such as
2617 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2619 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2620 exactly equivalent to M-w, C-w, and C-y respectively.
2622 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2623 non-nil by default, as Windows does not support the primary selection
2624 between applications.
2626 *** To return to the previous behavior, do the following:
2628 **** Change `select-active-regions' to nil.
2629 **** Change `mouse-drag-copy-region' to t.
2630 **** Change `x-select-enable-primary' to t (on X only).
2631 **** Change `x-select-enable-clipboard' to nil.
2632 **** Bind `mouse-yank-at-click' to mouse-2.
2634 *** Support for X cut buffers has been removed.
2636 *** X clipboard managers are now supported.
2637 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2639 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2640 in the current rectangle. With a prefix argument, this prompts for a
2641 number to count from and for a format string.
2643 ** `redisplay-dont-pause' now defaults to t.
2644 This makes Emacs feel more responsive to editing commands that arrive
2645 at high rate, e.g. if you lean on some key, because stopping redisplay
2646 in the middle (when this variable is nil) forces more expensive
2647 updates later on, and Emacs appears to be unable to keep up.
2649 ** The behavior of <TAB> for active regions in Text mode has changed.
2650 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2651 when the region is active causes Emacs to indent all the lines in the
2652 region, aligning them with the line previous to the first line in the
2653 region (or with the left margin if there is no previous line).
2655 ** When `occur' is called with a prefix argument, matching strings are
2656 collected into the `*Occur*' buffer without line numbers. If there
2657 are parenthesized subexpressions in the specified regexp, `occur'
2658 reads replacement text that may contain \\& and \\N whose convention
2659 follows `replace-match'.
2662 * Changes in Specialized Modes and Packages in Emacs 24.1
2664 ** Archive Mode has basic support for browsing and updating 7z archives.
2668 *** BibTeX mode now supports biblatex.
2669 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2670 `bibtex-entry-field-alist' is now an obsolete alias for
2671 `bibtex-BibTeX-entry-alist'.
2673 *** New command `bibtex-search-entries', bound to C-c C-a.
2675 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2677 *** New variable `bibtex-search-entry-globally'.
2681 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2683 *** The default browser used by the package is now the "xdg-open" program,
2684 on platforms that support it. This calls your desktop's preferred browser.
2688 *** Support for musical notes.
2690 *** Support for logarithmic units.
2692 *** No longer uses the tex prefix for TeX specific unit names when
2693 using TeX or LaTeX mode.
2695 *** New option to highlight selections using faces.
2697 *** `calc-histogram' has the option of using a vector to determine the bins.
2699 *** New "O" option prefix.
2701 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2703 ** Calendar, Diary, and Appt
2705 *** Diary entries can contain non-printing "comments".
2706 See the variable `diary-comment-start'.
2708 *** Appointments can specify their individual warning times.
2709 See the variable `appt-warning-time-regexp'.
2711 *** The function specified by `appt-disp-window-function' may be passed
2712 lists of arguments if multiple appointments are due at similar times.
2713 If you are using a custom function for this, you should update it.
2715 *** New function `diary-hebrew-birthday'.
2717 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2718 may no longer be nil, but must all be strings.
2720 *** The obsolete (since Emacs 22.1) method of enabling the appt
2721 package by adding `appt-make-list' to `diary-hook' has been removed.
2722 Use `appt-activate' instead.
2724 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2725 appt-issue-message (use the function appt-activate)
2726 appt-visible/appt-msg-window (use the variable appt-display-format)
2728 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2729 view-diary-entries, list-diary-entries, show-all-diary-entries
2733 *** New feature to "guess" the style in an existing buffer.
2734 The main entry point is M-x c-guess.
2736 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2738 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2739 Thus C-M-a will, by default, go to the beginning of the immediate function,
2742 *** "Macros with semicolons" can be registered for correct indentation.
2743 Where such a macro ends a line (no semicolon) the next statement is no longer
2744 parsed as a statement continuation.
2746 ** Comint and modes derived from it use the standard completion code.
2750 *** Compilation mode can be used without Font Lock mode.
2751 `compilation-parse-errors-function' is now obsolete.
2753 *** New variable `compilation-filter-start', which is bound while
2754 `compilation-filter-hook' runs. It records the start position of the
2755 text inserted by `compilation-filter'.
2757 *** `compilation-error-screen-columns' and `compilation-first-column'
2758 are obeyed in the editing buffer. So programming language modes can
2759 set them, whereas previously only the value in the *Compilation*
2764 *** Customize buffers now contain a search field.
2765 The search is performed using `customize-apropos'.
2766 To turn off the search field, set `custom-search-field' to nil.
2768 *** Options in customize group buffers start out hidden if not customized.
2769 Use the arrow to the left of the option name to toggle visibility.
2771 *** custom-buffer-sort-alphabetically now defaults to t.
2773 *** The color widget now has a "Choose" button, which allows you to
2774 choose a color via `list-colors-display'.
2778 *** It is now possible to access buses other than the default system
2781 *** The `dbus-register-method' and `dbus-register-property' functions
2782 optionally do not register names.
2784 *** The new function `dbus-register-service' registers a known service
2785 name on a D-Bus without also registering a property or a method.
2789 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2790 if called with a prefix argument, read a file name from the minibuffer
2791 instead of using the current buffer.
2793 *** The "dired local variables" feature of Dired-x is obsolete.
2794 The standard directory local variables feature replaces it.
2798 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2799 controlling attempts to autojoin a channel.
2801 *** New variable `erc-coding-system-precedence': If we use `undecided'
2802 as the server coding system, this variable will then be consulted.
2803 The default is to decode strings that can be decoded as utf-8 as
2804 utf-8, and do the normal `undecided' decoding for the rest.
2808 *** The default value of `eshell-directory-name' has changed
2809 to be an "eshell" directory in `user-emacs-directory'.
2810 The old "~/.eshell/" directory is still used if it exists, though.
2814 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2815 It now supports multithread non-stop debugging and simultaneous
2816 debugging of several threads.
2820 *** RET (`image-toggle-animation') toggles animation, if applicable.
2821 Animation plays once, unless the option `image-animate-loop' is non-nil.
2825 *** New command M-x info-display-manual displays a named Info manual.
2826 If that manual is already visited in some Info buffer, it displays
2827 that buffer. (This is handy if you have many manuals in many *info*
2828 buffers, and don't remember the name of the buffer visiting the manual
2829 you want to consult.) Otherwise, it loads and displays the manual.
2831 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2832 This is for compatibility with the stand-alone Info reader program,
2833 and also because `Info-edit' is a rarely used command that is disabled
2836 ** Mail mode changes (not Message mode)
2838 *** New command M-x mail-add-attachment for adding MIME attachments
2840 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2841 (Its name is misleading, since it has nothing to do with MIME
2842 attachments.) The old name is now an obsolete alias to the new name.
2844 ** MH-E has been updated to MH-E version 8.3.1.
2845 See MH-E-NEWS for details.
2847 ** Modula-2 mode provides auto-indentation.
2849 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2851 ** nXML mode no longer binds C-RET to `nxml-complete'.
2852 Completion is now performed via `completion-at-point', bound to C-M-i
2853 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2854 default), this performs tag completion.
2856 ** Org mode has been updated to version 7.8.09.
2857 See ORG-NEWS for details.
2859 ** Prolog mode has been completely revamped, with lots of additional
2860 functionality such as more intelligent indentation, electricity,
2861 support for more variants, including Mercury, and a lot more.
2865 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2866 in the Rmail incoming message.
2868 *** The variable `rmail-message-filter' no longer has any effect.
2869 This change was made in Emacs 23.1 but was not advertised at the time.
2870 Try using `rmail-show-message-hook' instead.
2874 *** M-x shell prompts for the shell path name if the default directory
2875 is a remote file name and neither the environment variable $ESHELL nor
2876 the variable `explicit-shell-file-name' is set.
2878 *** TAB is now bound to the standard `completion-at-point' command,
2879 which now implements the pcomplete rules for shell command completion.
2883 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2884 if the mail server supports them. This uses either built-in GnuTLS
2885 support, or the starttls.el library. Customize `smtpmail-stream-type'
2888 *** The variable `smtpmail-auth-credentials' has been removed.
2889 By default, the information is now stored in the file ~/.authinfo.
2890 This was the default value of smtpmail-auth-credentials. If you had
2891 customized smtpmail-auth-credentials to a list of user names and
2892 passwords, those settings are not used. During your first connection
2893 to the smtp server, Emacs will prompt for the user name and password,
2894 and offer to save them to ~/.authinfo. Or you can manually copy the
2895 credentials to ~/.authinfo. For example, if you had
2897 (setq smtpmail-auth-credentials
2898 '(("mail.example.org" 25 "jim" "s!cret")))
2900 then the equivalent line in ~/.authinfo would be
2902 machine mail.example.org port 25 login jim password s!cret
2904 See the auth-source manual for more information, e.g. on encrypting
2905 the credentials file.
2907 *** The variable `smtpmail-starttls-credentials' has been removed.
2908 If you had that set, you need to put
2910 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2912 in your ~/.authinfo file instead.
2914 *** SMTPmail defaults to using the address in the From: header as the
2915 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2916 to the address you wish to use instead.
2920 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2921 and `sql-oracle-scan-on'.
2923 *** New options controlling prompting for login parameters.
2924 Each supported product has a custom variable `sql-*-login-params',
2925 which is a list of the parameters to be prompted for before a
2926 connection is established.
2928 *** The command `sql-product-interactive' now takes a prefix argument,
2929 which causes it to prompt for an SQL product.
2931 *** Product-specific SQL interactive commands now take prefix arguments.
2932 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2933 given a prefix argument, prompt for a name for the SQL interactive
2934 buffer. This reduces the need for calling `sql-rename-buffer'.
2936 *** SQL interactive modes suppress command continuation prompts, and
2937 replace tabs with spaces. The first change impacts multiple line SQL
2938 statements entered with C-j between each line, statements yanked into
2939 the buffer and statements sent with `sql-send-*' functions. The
2940 second prevents the MySQL and Postgres interpreters from listing
2941 object name completions when sent text via `sql-send-*' functions.
2943 *** New command `sql-connect' starts a predefined SQLi session,
2944 using the login parameters from `sql-connection-alist'.
2946 *** New "Save Connection" menu item in SQLi buffers.
2947 This gathers the login params specified for the SQLi session, if it
2948 was not started by a connection, and saves them as a new connection.
2950 *** New commands for listing database objects and details:
2951 sql-list-all and sql-list-table.
2953 *** An API for manipulating SQL product definitions has been added.
2957 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
2961 *** New inline access method "ksu" (kerberized su).
2963 *** The following access methods are discontinued: "ssh1_old",
2964 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
2966 *** The user option `remote-file-name-inhibit-cache' controls whether
2967 remote file attributes are cached for better performance.
2969 *** The option `ange-ftp-binary-file-name-regexp' has changed its
2970 default value to "".
2972 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
2973 for remote machines which support SELinux.
2975 ** New function `url-queue-retrieve', which behaves like url-retrieve,
2976 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2977 the degree of parallelism.
2979 ** VC and related modes
2981 *** Support for pulling on distributed version control systems.
2982 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2983 supported (currently with Bzr, Git, and Mercurial), to update the
2984 current branch and working tree. A prefix argument means to prompt
2985 the user for specifics, e.g. a pull location.
2987 *** `vc-update' is now an alias for `vc-pull'.
2989 *** Support for merging on distributed version control systems.
2990 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2991 is supported (currently with Bzr, Git, and Mercurial), to merge
2992 changes from another branch into the current one. It prompts for
2993 specifics, e.g. a merge source.
2995 *** New option `vc-revert-show-diff' controls whether `vc-revert'
2996 shows a diff while querying the user. It defaults to t.
2998 *** Log entries in some Log View buffers can be toggled to display a
2999 longer description by typing RET (log-view-toggle-entry-display).
3000 This is currently supported for Bzr, Git, and Mercurial (to support
3001 another backend, define a `log-view-expanded-log-entry-function').
3002 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3003 use this to display the full log entry for the revision at point.
3005 *** New command `vc-ediff' allows visual comparison of two revisions
3006 of a file similar to `vc-diff', but using ediff backend.
3008 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3009 this was not advertised at the time.
3011 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3012 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3013 this was not advertised at the time.
3019 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3021 *** partial-completion-mode (complete.el) is obsolete.
3022 You can get a comparable behavior with:
3023 (setq completion-styles '(partial-completion initials))
3024 (setq completion-pcm-complete-word-inserts-delimiters t)
3026 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3028 *** pgg is obsolete (use EasyPG instead).
3030 *** sregex.el is obsolete, since rx.el is a strict superset.
3032 *** s-region.el and pc-select.el are obsolete.
3033 They are superseded by shift-select-mode, enabled by default since 23.1.
3035 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3039 *** The Landmark game is now invoked with `landmark', not `lm'.
3040 Its functions and variables have been similarly renamed.
3042 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3043 (This interfered with cua-mode.)
3045 *** f90.el has some support for Fortran 2008 syntax.
3047 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3049 *** New command `nato-region' converts text to NATO phonetic alphabet.
3052 * New Modes and Packages in Emacs 24.1
3054 ** Occur Edit mode applies edits made in *Occur* buffers to the
3055 original buffers. It is bound to "e" in Occur mode.
3057 ** New global minor mode electric-pair-mode.
3058 When enabled, typing an open parenthesis automatically inserts the
3059 matching closing one.
3061 ** New global minor mode electric-indent-mode.
3062 When enabled, typing certain characters triggers reindentation.
3063 Major modes wishing to use this can set electric-indent-chars or
3064 electric-indent-functions.
3066 ** New global minor mode electric-layout-mode.
3067 When enabled, typing certain characters automatically inserts newlines.
3068 Major modes wishing to use this can set electric-layout-rules.
3070 ** tabulated-list.el provides a generic major mode for tabulated data,
3071 from which other modes can be derived.
3073 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3075 ** secrets.el is an implementation of the Secret Service API, an
3076 interface to password managers like GNOME Keyring or KDE Wallet. The
3077 Secret Service API requires D-Bus for communication. The command
3078 `secrets-show-secrets' offers a buffer with a visualization of the
3081 ** notifications.el provides an implementation of the Desktop
3082 Notifications API. It requires D-Bus for communication.
3084 ** soap-client.el supports access to SOAP web services from Emacs.
3085 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3087 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3089 ** New emacs-lock.el package.
3090 The previous version has been moved to obsolete/old-emacs-lock.el.
3091 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3092 against exiting Emacs and killing the buffer can be set separately.
3093 The mechanism for automatically turning off protection for buffers
3094 with dead inferior processes has been generalized.
3097 * Incompatible Lisp Changes in Emacs 24.1
3099 ** Passing a nil argument to a minor mode function call now ENABLES
3100 the minor mode unconditionally. This is so that you can write e.g.
3102 (add-hook 'text-mode-hook 'foo-mode)
3104 to enable foo-mode in Text mode buffers, removing the need for
3105 `turn-on-foo-mode' style functions. This affects all mode commands
3106 defined by `define-minor-mode'. If called interactively, the mode
3107 command still toggles the minor mode.
3109 ** The return value of `backup-buffer' has changed.
3110 It is now a list of three elements, where the second element is a list
3111 describing the original file's SELinux context. If Emacs or the
3112 system lacks SELinux support, the context list is (nil nil nil nil).
3113 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3115 ** `char-direction-table' and the `char-direction' function were deleted.
3116 They were buggy and inferior to the new support of bidirectional
3117 editing introduced in Emacs 24. If you need the bidirectional
3118 properties of a character, use `get-char-code-property' with the last
3119 argument `bidi-class'.
3121 ** `copy-directory' now copies the source directory as a subdirectory
3122 of the target directory, if the latter is an existing directory. The
3123 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3124 the contents directly into a pre-existing target directory.
3126 ** For mouse click input events in the text area, the Y pixel
3127 coordinate in the POSITION list now counts from the top of the text
3128 area, excluding any header line. Previously, it counted from the top
3131 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3132 been further reduced. Now a backquote not followed by a space is
3133 always treated as a "new-style" backquote. Please remove all
3134 "old-style" backquotes from your code. If your code uses backquotes
3135 as documented in the Elisp manual, and compiles without warning, then
3136 you have nothing to do in this regard. Code not following the
3137 appropriate conventions may fail to compile.
3139 The most common cause of trouble seems to be an old-style backquote
3140 followed by a newline. Another cause of trouble is vector notation
3141 for key sequence notation: instead of [(control ,)] and [(control ')],
3142 you should write [(control ?,)] and [(control ?')], which will work in
3145 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3146 was not advertised at the time. The function `custom-initialize-delay'
3147 replaced all known uses.
3149 ** `view-buffer' now treats special mode-class in the same way that
3150 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3151 major mode is special).
3153 ** Menu and tool bar changes
3155 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3156 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3157 With these alist entries omitted, `make-frame' checks the value of the
3158 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3159 a menu-bar or tool-bar, respectively. If the alist entries are added,
3160 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3162 *** The menu bar bindings's caches are not used any more.
3163 Use (where-is-internal <def> nil t) instead.
3165 ** Regions created by mouse dragging are now normal active regions,
3166 similar to those created by shift-selection (see Selection changes
3167 above). In previous Emacs versions, these regions were delineated by
3168 `mouse-drag-overlay'; that variable has been removed.
3170 ** The fourth argument of `filter-buffer-substring' has been removed.
3171 If you want to remove text properties from the final result, simply
3172 pass the result through substring-no-properties.
3174 ** cl.el no longer provides `cl-19'.
3176 ** The following obsolete functions and aliases have been removed
3177 (the appropriate new function is given in parentheses; "not needed"
3178 means you can just remove all calls to the function in question):
3180 *** `comint-kill-output' (`comint-delete-output')
3181 *** `decompose-composite-char' (`char-to-string')
3182 *** `outline-visible' (`outline-invisible-p')
3183 *** `internal-find-face' (`facep')
3184 *** `internal-get-face' (`facep and check-face')
3185 *** `frame-update-faces' (not needed)
3186 *** `frame-update-face-colors' (`frame-set-background-mode')
3187 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3188 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3189 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3190 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3191 *** `x-make-font-unbold' (`make-face-unbold')
3192 *** `x-make-font-unitalic' (`make-face-unitalic')
3193 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3194 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3195 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3196 *** `char-bytes' (== 1)
3197 *** `isearch-return-char' (`isearch-printing-char')
3198 *** `make-local-hook' (not needed)
3199 *** `set-screen-height' (`set-frame-height')
3200 *** `set-screen-width' (`set-frame-width')
3202 ** The following obsolete variables and varaliases have been removed
3203 (the appropriate new variable is given in parentheses):
3205 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3206 *** `vc-header-alist' (`vc-BACKEND-header')
3207 *** `directory-sep-char' (== ?/)
3208 *** `font-lock-defaults-alist' (`font-lock-defaults')
3209 *** `e' (`float-e').
3211 ** The following obsolete files were removed:
3212 sc.el, x-menu.el, rnews.el, rnewspost.el
3214 ** The format of the finder-inf.el file has changed, since the Finder
3215 mechanism is now based on the package system. The variable
3216 `finder-package-info' is replaced by `package--builtins' and
3217 `finder-keywords-hash'.
3219 ** When generating autoloads, `update-directory-autoloads' no longer
3220 assumes every inspected file is in your `load-path'. It instead
3221 generates relative names according to the current `load-path'.
3224 * Lisp Changes in Emacs 24.1
3226 ** Code can now use lexical scoping by default instead of dynamic scoping.
3227 The `lexical-binding' variable enables lexical scoping for local
3228 variables. It is typically set via a file-local variable in the first
3229 line of the file, in which case it applies to all the code in that
3232 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3233 binding instead of the old dynamic binding mode.
3235 *** Lexically scoped interpreted functions are represented with a new form
3236 of function value which looks like (closure ENV ARGS &rest BODY).
3238 *** New macro `letrec' to define recursive local functions.
3240 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3241 So do `defcustom' and other forms that call `defvar' as a subroutine.
3243 *** New function `special-variable-p' to check whether a variable is
3244 declared as dynamically bound.
3246 *** The form ((lambda ...) ...) is deprecated.
3248 ** An Emacs Lisp testing tool is now included.
3249 Emacs Lisp developers can use this tool to write automated tests for
3250 their code. See the ERT info manual for details.
3252 ** Changes for bidirectional display and editing
3254 *** New function `current-bidi-paragraph-direction'.
3255 This returns the base direction of the paragraph at point.
3257 *** New function `bidi-string-mark-left-to-right'.
3258 Given a string containing characters from right-to-left scripts, this
3259 function returns another string which can be safely inserted into a
3260 buffer, such that any following text will be always displayed to the
3261 right of that string. (This works by appending an invisible Unicode
3262 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3264 This is useful when the buffer has overall left-to-right paragraph
3265 direction and you need to insert a string whose contents are not known
3266 in advance, without disrupting the layout of the line.
3270 *** Window tree functions are accessible in Elisp.
3271 Functions are provided to return the parent, siblings or child windows
3272 of any window including internal windows (windows not associated with a
3273 buffer) in the window tree.
3275 **** New function `window-valid-p' gives non-nil for live and internal
3278 **** Window manipulation can deal with internal windows.
3279 Many window handling functions like `split-window', `delete-window', or
3280 `delete-other-windows' as well as the window resizing functions can now
3281 act on any window including internal ones.
3283 *** window-total-height/-width vs window-body-height/-width.
3284 The function `window-height' has been renamed to `window-total-height'
3285 and `window-width' has been renamed to `window-body-width'. The old
3286 names are provided as aliases. Two new functions `window-total-width'
3287 and `window-body-height' are provided.
3289 *** Window parameters specific to window handling functions.
3290 For each window you can specify a parameter to override the default
3291 behavior of a number of functions like `split-window', `delete-window'
3292 and `delete-other-windows'. The variable `ignore-window-parameters'
3293 allows to ignore processing such parameters.
3295 *** New semantics of third argument of `split-window'.
3296 The third argument of `split-window' has been renamed to SIDE and can be
3297 set to any of the values 'below, 'right, 'above, or 'left to make the
3298 new window appear on the corresponding side of the window that shall be
3299 split. Any other value of SIDE will cause `split-window' to split the
3300 window into two side-by-side windows as before.
3302 *** Window resizing functions.
3303 A new standard function for resizing windows called `window-resize' has
3304 been introduced. This and all other functions for resizing windows no
3305 longer delete any windows when they become too small.
3307 *** Deleting the selected window now selects the most recently selected
3308 live window on that frame instead.
3310 *** `adjust-window-trailing-edge' adjustments.
3311 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3312 is able to resize other windows if a window adjacent to the trailing
3313 edge cannot be shrunk any more. This makes its behavior more similar to
3314 that of Emacs 21 without compromising, however, its inability to delete
3315 windows which was introduced in Emacs 22.
3317 *** Window-local buffer lists.
3318 Windows now have local buffer lists. This means that removing a buffer
3319 from display in a window will preferably show the buffer previously
3320 shown in that window with its previous window-start and window-point
3321 positions. This also means that the same buffer may be automatically
3322 shown twice even if it already appears in another window.
3324 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3325 which if non-nil requires the buffer to be displayed in the currently
3326 selected window, signaling an error otherwise. If nil, another window
3327 can be used, e.g. if the selected one is strongly dedicated.
3329 *** `split-window-vertically' and `split-window-horizontally' renamed
3330 to `split-window-below' and `split-window-right' respectively.
3331 The old names are kept as aliases.
3335 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3336 named ACTION, and takes a display action of the same form as
3337 `display-buffer-base-action' (see Changes, above). A non-nil,
3338 non-list value is treated specially, as the old meaning.
3340 **** New variable `display-buffer-overriding-action'.
3342 **** The procedure of `display-buffer' etc. to choose a window is
3343 determined by combining `display-buffer-overriding-action',
3344 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3345 and `display-buffer-fallback-action'. The second and fourth of these
3346 are user-customizable variables.
3348 See the docstring of `display-buffer' for details.
3350 *** New functions `window-state-get' and `window-state-put'.
3351 These functions allow to save and restore the state of an arbitrary
3352 frame or window as an Elisp object.
3356 *** New variable `completion-extra-properties' used to specify extra
3357 properties of the current completion:
3358 - :annotate-function, same as the old completion-annotate-function.
3359 - :exit-function, function to call after completion took place.
3361 *** Functions on `completion-at-point-functions' can return any of the
3362 properties valid for `completion-extra-properties'.
3364 *** `completion-annotate-function' is obsolete.
3366 *** New `metadata' method for completion tables. The metadata thus returned
3367 can specify various details of the data returned by `all-completions':
3368 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3369 used to select a style in completion-category-overrides.
3370 - `annotation-function' to add annotations in *Completions*.
3371 - `display-sort-function' to specify how to sort entries in *Completions*.
3372 - `cycle-sort-function' to specify how to sort entries when cycling.
3374 *** `minibuffer-local-filename-must-match-map' is not used any more.
3375 Instead, the bindings in `minibuffer-local-filename-completion-map'
3376 are combined with `minibuffer-local-must-match-map'.
3378 *** New variable `completing-read-function' allows overriding the
3379 behavior of `completing-read'.
3381 ** `glyphless-char-display' can now distinguish between graphical and
3382 text terminal display, via a char-table entry that is a cons cell.
3384 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3385 Instead, the offending function is removed.
3389 *** New function `run-hook-wrapped' for running an abnormal hook by
3390 passing the hook functions as arguments to a "wrapping" function.
3391 Like `run-hook-with-args-until-success', it stops at the first
3392 non-nil return value.
3394 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3395 set of "wrapping" filters, similar to around advice.
3396 (A version of this macro was actually added in Emacs 23.2 but was not
3397 advertised at the time.)
3401 *** New macro `condition-case-unless-debug' (this was actually added in
3402 Emacs 23.1 as condition-case-no-debug, but not advertised)
3404 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3406 *** Variable `stack-trace-on-error' removed.
3408 *** The debugger can now "continue" from an error, which means it will
3409 jump to the error handler as if the debugger had not been invoked
3410 instead of jumping all the way to the top-level.
3412 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3413 This can be useful when `inhibit-quit' is set.
3415 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3416 named Emacs server instances.
3418 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3419 to redirect STDOUT to a file.
3421 ** The function `format-time-string' now supports the %N directive,
3422 for higher-resolution time stamps.
3424 ** New input reading functions
3426 *** New function `read-char-choice' reads a restricted set of
3427 characters, discarding any inputs not inside the set.
3429 *** The command `read-color' now requires a match for a color name
3430 or RGB triplet, instead of signaling an error if the user provides
3433 **** `facemenu-read-color' is now an alias for `read-color'.
3435 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3436 The variable is now used to load all kind of supported dynamic libraries,
3437 not just image libraries. The previous name is still available as an
3440 ** Syntax parsing changes
3442 *** New variable `syntax-propertize-function'.
3443 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3444 This allows syntax-table properties to be set independently from font-lock:
3445 just call syntax-propertize to make sure the text is propertized.
3446 Together with this new variable come a new hook
3447 syntax-propertize-extend-region-functions, as well as two helper functions:
3448 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3449 as-is; and syntax-propertize-rules which provides a new way to specify
3452 *** Syntax tables support a new "comment style c" additionally to style b.
3454 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3456 ** frame-local variables cannot be let-bound any more.
3458 ** Major and minor mode changes
3460 *** `set-auto-mode' now respects mode: local variables at the end of files,
3461 as well as those in the -*- line.
3463 *** `prog-mode' is a new major mode from which programming modes
3466 **** `prog-mode-hook' can be used to enable features for programming
3467 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3468 on-the-fly spell checking for comments and strings.
3470 **** New minor modes `prettify-symbols-mode' and
3471 `global-prettify-symbols-mode' let the user enable symbol
3472 prettification (replacing a string like "lambda" with the Greek lambda
3475 *** New hook `change-major-mode-after-body-hook', run by
3476 `run-mode-hooks' just before any other mode hooks.
3478 *** Enabled globalized minor modes can be disabled in specific major modes.
3479 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3480 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3482 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3484 ** File-handling changes
3486 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3487 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3488 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3489 argument is supplied (see Trash changes, above).
3491 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3493 ** Tool-bars can display separators.
3494 Tool-bar separators are handled like menu separators in menu-bar maps,
3495 i.e. via menu entries of the form `(menu-item "--")'.
3499 *** Animated images support (currently animated gifs only).
3501 **** `image-animated-p' returns non-nil if an image can be animated.
3503 **** `image-animate' animates a supplied image spec.
3505 **** `image-animate-timer' returns the timer object for an image that
3508 *** `image-extension-data' has been renamed to `image-metadata'.
3509 The old name is an obsolete alias to the new one.
3511 *** Image mode can view any image type that ImageMagick supports.
3512 This requires Emacs to be built with ImageMagick support.
3514 **** New function `imagemagick-types', defined if ImageMagick support
3515 is enabled, returns a list of image file extensions that your
3516 ImageMagick installation supports.
3518 **** New function `imagemagick-register-types' enables ImageMagick
3519 image types in Image mode and in `create-image' and other helper
3522 **** New option `imagemagick-types-inhibit' excludes certain
3523 ImageMagick image types from `imagemagick-register-types'.
3525 **** With ImageMagick support, there are extra Image mode commands to
3526 resize and rotate images: `image-transform-fit-to-height',
3527 `image-transform-fit-to-width', `image-transform-set-rotation', and
3528 `image-transform-set-scale'.
3530 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3531 passes it to the mail user agent function. This argument specifies an
3532 action for returning to the caller after finishing with the mail. For
3533 example, this is used by Rmail to optionally delete a mail window.
3535 ** XML and HTML parsing
3536 If Emacs is compiled with libxml2 support, there are two new
3537 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3538 and `libxml-parse-xml-region' (which parses XML). Both return an
3539 Emacs Lisp parse tree.
3541 ** Networking and encryption changes
3543 *** `open-network-stream' can now be used to open an encrypted stream.
3544 It now accepts an optional `:type' parameter for initiating a TLS
3545 connection, directly or via STARTTLS. To do STARTTLS, additional
3546 parameters (`:end-of-command', `:success', `:capabilities-command')
3547 must also be supplied.
3549 *** New library gnutls.el.
3550 The new function `gnutls-available-p' returns non-nil if Emacs is
3551 built with GnuTLS support. The main entry points are
3552 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3553 these functions through `open-network-stream', because that can
3554 upgrade connections through STARTTLS opportunistically or use plain
3555 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3558 *** New primitive `secure-hash' that supports many secure hash algorithms:
3559 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3560 sha1.el has been removed. The `sha1' feature is provided by default.
3564 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3566 ** Progress reporters can now "spin".
3567 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3568 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3569 time you call `progress-reporter-update' on that progress reporter,
3570 with a nil or omitted VALUE argument, the reporter message is
3571 displayed with a "spinning bar".
3573 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3574 being reverted, even if the buffer has a local `revert-buffer-function'.
3576 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3577 If delayed-warnings-list is non-nil, the command loop calls
3578 `delayed-warnings-hook' after `post-command-hook'. At present, this
3579 is only used by Emacs on some platforms to display warnings during
3580 startup, which might otherwise not be noticed. This uses the
3581 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3583 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3585 ** New function `make-composed-keymap' that constructs a new keymap
3586 from multiple input maps. You can use this to make a keymap that
3587 inherits from multiple maps, eg:
3588 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3590 ** New function `string-prefix-p'.
3591 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3593 ** New reader macro ## that stands for the empty symbol.
3594 This means that the empty symbol can now be read back. Also, #: by itself
3595 (when not immediately followed by a possible symbol character) stands for
3596 an empty uninterned symbol.
3598 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3600 ** The following functions and variables are obsolete:
3602 *** `tooltip-use-echo-area' is obsolete.
3603 Rather than setting this to t, disable Tooltip mode instead.
3605 *** buffer-substring-filters is obsolete.
3606 Use `filter-buffer-substring-functions' instead.
3608 *** `byte-compile-disable-print-circle' is obsolete.
3610 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3611 Use `post-command-hook' instead.
3613 *** `font-lock-maximum-size' is obsolete.
3616 * Changes in Emacs 24.1 on Non-Free Operating Systems
3618 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3619 and also when HOME is set to C:\ by default.
3621 ** New configure.bat options
3623 *** --enable-checking builds Emacs with extra runtime checks.
3625 *** --distfiles specifies files to be included in binary distribution.
3627 *** --without-gnutls disables automatic GnuTLS detection.
3629 *** --lib for general library linkage, works with the USER_LIBS build variable.
3631 ** New make target `dist' to create binary distribution for MS Windows.
3633 ** The Lisp function `w32-default-color-map' is now obsolete.
3634 (It is only used internally in the Emacs C code.)
3636 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3637 reappear on mouse-over. (Requires OS X 10.6 or later.)
3639 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3640 other platforms, rather than inserting its contents into the buffer.
3643 ----------------------------------------------------------------------
3644 This file is part of GNU Emacs.
3646 GNU Emacs is free software: you can redistribute it and/or modify
3647 it under the terms of the GNU General Public License as published by
3648 the Free Software Foundation, either version 3 of the License, or
3649 (at your option) any later version.
3651 GNU Emacs is distributed in the hope that it will be useful,
3652 but WITHOUT ANY WARRANTY; without even the implied warranty of
3653 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3654 GNU General Public License for more details.
3656 You should have received a copy of the GNU General Public License
3657 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3662 paragraph-separate: "[
\f]*$"