1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 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. (?)
38 ** The configure option `--without-compress-info' has been generalized,
39 and renamed to `--without-compress-install'. It now prevents compression
40 of _any_ files during installation.
43 ** The configure option `--with-crt-dir' has been removed.
44 It is no longer needed, as the crt*.o files are no longer linked
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
58 pkg-config is required to find ImageMagick libraries.
60 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
61 For GNUStep and OSX 10.4 the old backend is used.
62 To use the old backend by default, do on the command line:
63 % defaults write org.gnu.Emacs FontBackend ns
65 ** If your Emacs was built from a repository checkout, the new variable
66 `emacs-repository-version' contains information about the bzr revision used.
67 In 24.3 this variable was `emacs-bzr-version`.
70 * Startup Changes in Emacs 24.4
73 ** When initializing `load-path', an empty element in the EMACSLOADPATH
74 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
75 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
76 load-path (the one that would have been used if EMACSLOADPATH was unset).
77 This makes it easier to _extend_ the load-path via EMACSLOADPATH
78 (previously, EMACSLOADPATH had to specify the complete load-path,
79 including the defaults). (In older versions of Emacs, an empty element
80 was replaced by ".", so use an explicit "." now if that is what you want.)
83 ** The -L option, which normally prepends its argument to load-path,
84 will instead append, if the argument begins with `:' (or `;' on MS Windows;
85 i.e., `path-separator').
88 ** If you use either site-load.el or site-init.el to customize the dumped
89 Emacs executable, any changes to `load-path' that these files make
90 will no longer be present after dumping. To affect a permanent change
91 to `load-path', use the `--enable-locallisppath' option of `configure'.
94 ** The user option `initial-buffer-choice' can now specify a function
95 to set up the initial buffer.
98 * Changes in Emacs 24.4
101 ** New option `gnutls-verify-error', if non-nil, means that Emacs
102 should reject SSL/TLS certificates that GnuTLS determines as invalid.
103 (This option defaults to nil at present, but this is expected to change
104 in a future release.)
107 ** Emacs now supports menus on text-mode terminals.
108 If the terminal supports a mouse, clicking on the menu bar, or on
109 sensitive portions of the mode line or header line, will drop down the
110 menu defined at that position. Likewise, clicking C-mouse-2 or
111 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
114 If the text terminal does not support a mouse, you can activate the
115 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
117 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
118 customize the option `tty-menu-open-use-tmm' to a non-nil value.
119 (Typing M-` will always invoke `tmm-menubar', even if
120 `tty-menu-open-use-tmm' is nil.)
123 ** The *Messages* buffer is created in `messages-buffer-mode',
124 a new major mode, with read-only status. Any code that might create
125 the *Messages* buffer should call the function `messages-buffer' to do
126 so and set up the mode.
128 ** Emacs now supports ACLs (access control lists).
130 *** Emacs preserves the ACL entries of files when backing up.
132 *** New functions `file-acl' and `set-file-acl' get and set the ACL
133 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
134 libacl. On MS-Windows, the NT Security APIs are used to emulate the
135 POSIX ACL interfaces.
137 ** Multi-monitor support has been added.
139 *** New functions `display-monitor-attributes-list' and
140 `frame-monitor-attributes' can be used to obtain information about
141 each physical monitor on multi-monitor setups.
143 *** The functions `display-pixel-width' and `display-pixel-height' now
144 behave consistently among the platforms: they return the pixel width
145 or height for all physical monitors associated with the given display
146 as just they were on X11. To get information for each physical
147 monitor, use the new functions above. Similar notes also apply to
148 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
149 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
152 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
153 You can change the default by customizing `blink-cursor-blinks'.
156 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
157 This affects View mode, etc.
162 *** The command `apropos-variable' is renamed to `apropos-user-option'.
163 `apropos-user-option' shows all user options while `apropos-variable'
164 shows all variables. When called with a universal prefix argument,
165 the two commands swap their behaviors. When `apropos-do-all' is
166 non-nil, they output the same results.
169 *** The key `?' now describes prefix bindings, like `C-h'.
171 *** The command `quail-help' is deleted. Use `C-h C-\'
172 (`describe-input-method') instead.
177 *** ImageMagick images now support the :max-width and :max-height
180 *** Some data types aren't auto-detected by ImageMagick. Adding
181 :format to `create-image' may help if the content type is in the
182 new variable `image-format-suffixes'.
184 ** Frame and window changes
187 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
188 bound to <f11> and M-<f10>, respectively.
190 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
191 `frame-configuration-to-register'. It offers similar functionality,
192 plus enhancements like the ability to restore deleted frames. The
193 command `frame-configuration-to-register' still exists, but is unbound.
196 *** New hooks `focus-in-hook', `focus-out-hook'.
197 These are normal hooks run when an Emacs frame gains or loses input focus.
200 *** `split-window' is now a non-interactive function, not a command.
201 As a command, it was a special case of `C-x 2' (`split-window-below'),
202 and as such superfluous. After being reimplemented in Lisp, its
203 interactive form was mistakenly retained.
206 *** New option `scroll-bar-adjust-thumb-portion'.
207 Available only on X, this option allows to control over-scrolling
208 using the scroll bar (i.e. dragging the thumb down even when the end
209 of the buffer is visible).
211 ** Lisp evaluation changes
213 *** `eval-defun' on an already defined defcustom calls the :set function,
216 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
217 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
218 a list with no limit on its length and level (by using nil values of
219 `print-length' and `print-level'), and inserts additional formats for
220 integers (octal, hexadecimal, and character).
223 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
226 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
227 because it affects caching of paragraph scanning results as well.
230 ** The option `set-mark-default-inactive' has been deleted.
231 This unfinished feature was introduced by accident in Emacs 23.1;
232 simply disabling Transient Mark mode does the same thing.
234 ** The default value of `comment-use-global-state' is changed to t,
235 and this variable has been marked obsolete.
239 *** `read-regexp-defaults-function' defines a function to read regexps,
240 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp',
241 etc. You can customize this to specify a function that provides a
242 default value from the regexp last history element, or from the symbol
245 *** `load-prefer-newer', affects how the `load' function chooses the
246 file to load. If this is non-nil, then when both .el and .elc
247 versions of a file exist, and the caller did not explicitly specify
248 which one to load, then the newer file is loaded. The default, nil,
249 means to always load the .elc file.
252 * Editing Changes in Emacs 24.4
254 ** Indentation changes
257 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
258 When invoked without a prefix argument, it now activates a transient
259 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
260 the text indentation in the region. Typing any other key resumes
261 normal editing behavior.
263 *** `electric-indent-mode' is enabled by default.
265 *** `tab-stop-list' is now implicitly extended to infinity by repeating
266 the last step. Its default value is changed to nil which means a tab
267 stop every `tab-width' columns.
271 *** New command `cycle-spacing' cycles between spacing conventions:
272 having just one space, no spaces, or reverting to the original
273 spacing. Like `just-one-space', it can handle or ignore newlines and
274 leave different number of spaces.
276 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
277 a 1-letter word, which is an error according to Polish and
278 Czech typography rules. To globally enable this feature, evaluate:
280 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
283 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
285 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
286 Most commands are still unaware of it, but kill/yank do work on the rectangle.
289 ** New option `visual-order-cursor-movement'.
290 If this is non-nil, cursor motion with arrow keys will follow the
291 visual order of characters on the screen: <left> always moves to the
292 left, <right> always moves to the right, disregarding the surrounding
293 bidirectional context.
297 *** All register commands can now show help with preview.
300 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
303 *** New command `C-x r f' (`frameset-to-register').
304 See Changes in Emacs 24.4, above.
306 ** New command `delete-duplicate-lines'.
307 When its arg ADJACENT is non-nil (when called interactively with C-u
308 C-u) it works like the utility `uniq'. Otherwise by default it
309 deletes duplicate lines everywhere in the region without regard to
310 adjacency. When its arg KEEP-BLANKS is non-nil (when called
311 interactively with C-u C-u C-u), duplicate blank lines are preserved.
314 * Changes in Specialized Modes and Packages in Emacs 24.4
316 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
318 ~/.emacs.d/timelog replaces ~/.timelog
319 ~/.emacs.d/vip replaces ~/.vip
320 ~/.emacs.d/viper replaces ~/.viper
321 ~/.emacs.d/ido.last replaces ~/.ido.last
322 ~/.emacs.d/kkcrc replaces ~/.kkcrc
323 ~/.emacs.d/quickurls replaces ~/.quickurls
324 ~/.emacs.d/idlwave replaces ~/.idlwave
325 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
326 ~/.emacs.d/places replaces ~/.emacs-places
327 ~/.emacs.d/shadows replaces ~/.shadows
328 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
329 ~/.emacs.d/strokes replaces ~/.strokes
330 ~/.emacs.d/notes replaces ~/.notes
331 ~/.emacs.d/type-break replaces ~/.type-break
332 Also the following files used by the now obsolete otodo-mode.el:
333 ~/.emacs.d/todo-do replaces ~/.todo-do
334 ~/.emacs.d/todo-done replaces ~/.todo-done
335 ~/.emacs.d/todo-top replaces ~/.todo-top
337 ** Backtrace and debugger
339 *** The Lisp debugger's `e' command now includes the lexical environment
340 when evaluating the code in the context at point. Hence, it now lets
341 you access lexical variables.
344 *** New command `v' (`debugger-toggle-locals') displays local vars.
346 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
347 code run via JIT Lock.
352 *** Battery information via the BSD `apm' utility is now supported.
356 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
358 ** Calendar and Diary
361 *** New faces `calendar-weekday-header', `calendar-weekend-header',
362 and `calendar-month-header'.
365 *** New option `calendar-day-header-array'.
368 *** New variable `diary-from-outlook-function', used by the command
369 `diary-from-outlook'.
372 *** The variable `calendar-font-lock-keywords' is obsolete.
376 *** Calc by default now uses the Gregorian calendar for all dates, and
377 uses January 1, 1 AD as its day number 1. Previously Calc used the
378 Julian calendar for dates before September 14, 1752, and it used
379 December 31, 1 BC as its day number 1; the new scheme is more
380 consistent with Calendar's calendrical system and day numbering.
382 *** The new variable `calc-gregorian-switch' lets you configure the
383 date when Calc switches from the Julian to the Gregorian calendar.
384 Nil, the default value, means to always use the Gregorian calendar.
385 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
388 *** Support for ISO 8601 dates.
394 **** The cpp-root project now supports executing a compile command.
395 It can be set through the new :compile-command slot or the
396 buffer-local variable `compile-command'.
398 **** Better selection of include directories for the 'linux' project.
399 Include directories now support out-of-tree build directories and
400 target architecture auto-detection.
404 **** Improved detection of used namespaces in current scope in C++.
406 **** Parsing of default values for variables and function arguments in C/C++.
407 They are also displayed by the summarize feature in the modeline.
409 **** Improved parsing of function pointers in C/C++.
410 This also includes parsing of function pointers as function arguments.
412 **** Parsing of C/C++ preprocessor macros which open new scope.
413 For example, this enables parsing of macros which open new namespaces.
415 **** Support for 'this' pointer in inline member functions in C++.
419 *** New macro `cl-tagbody'.
422 *** letf is now just an alias for cl-letf.
426 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
427 Hence, you can now enable it independently from `transient-mark-mode',
428 `delete-selection-mode', and `shift-select-mode'.
430 *** `cua-highlight-region-shift-only' is now obsolete.
431 You can disable `transient-mark-mode' to get the same result.
433 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
437 *** Support for completion, ElDoc, and Flycheck has been added.
439 *** The current CFEngine syntax is parsed from "cf-promises -s json".
440 There is a fallback syntax available if you don't have cf-promises or
441 if it doesn't support that option.
443 ** Delete Selection mode can now be used without `transient-mark-mode'.
447 *** `desktop-auto-save-timeout' defines the number of seconds idle time
448 before auto-save of the desktop.
450 *** `desktop-restore-frames', enabled by default, allows saving and
451 restoring the frame/window configuration (frameset). Additional options
452 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
453 and `desktop-restore-forces-onscreen' offer further customization.
457 *** New minor mode `dired-hide-details-mode' hides details.
459 ** Eldoc Mode works properly in the minibuffer.
461 ** Electric Pair mode
462 *** New `electric-pair-preserve-balance' enabled by default.
464 Pairing/skipping only kicks in when that help the balance of
465 parentheses and quotes, i.e. the buffer should end up at least as
468 You can further control this behavior by adjusting the predicates
469 stored in `electric-pair-inhibit-predicate' and
470 `electric-pair-skip-self'.
472 *** New `electric-pair-delete-adjacent-pairs' enabled by default.
474 In `electric-pair-mode', the commands `backward-delete-char' and
475 `backward-delete-char-untabify' are now bound to electric variants
476 that delete the closer when invoked between adjacent pairs.
478 *** New `electric-pair-open-newline-between-pairs' enabled by default.
480 In `electric-pair-mode', inserting a newline between adjacent pairs
481 opens an extra newline after point, which is indented if
482 `electric-indent-mode' is also set.
484 *** New `electric-pair-skip-whitespace' enabled by default.
486 Controls if skipping over closing delimiters should jump over any
487 whitespace slack. Setting it to `chomp' makes it delete this
488 whitespace. See also the variable
489 `electric-pair-skip-whitespace-chars'.
491 *** New variables control the pairing in strings and comments.
493 You can customize `electric-pair-text-pairs' and
494 `electric-pair-text-syntax-table' to tweak pairing behavior inside
495 strings and comments.
499 *** New option `epa-mail-aliases'.
501 You can set this to a list of alias expansions for keys to use
502 in `epa-mail-encrypt'.
504 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
505 that means: when one of the recipients of the message being encrypted
506 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
508 If one element of the variable's value is ("foo@bar.com"),
509 that means: when one of the recipients of the message being encrypted
510 is `foo@bar.com', ignore that name as regards encryption.
511 This is useful to avoid a query when you have no key for that name.
515 *** New option `erc-accidental-paste-threshold-seconds'.
516 If set to a number, this can be used to avoid accidentally paste large
517 amounts of data into the ERC input.
522 *** New macro `skip-unless' allows skipping ERT tests.
523 See the ERT manual for details.
528 *** `eshell' now supports visual subcommands and options
529 Eshell has been able to handle "visual" commands (interactive,
530 non-line oriented commands such as top that require display
531 capabilities not provided by eshell) by running them in an Emacs
532 terminal emulator. See `eshell-visual-commands'.
534 This feature has been extended to subcommands and options that make a
535 usually line-oriented command a visual command. Typical examples are
536 "git log" and "git <command> --help" which display their output in a
537 pager by default. See `eshell-visual-subcommands' and
538 `eshell-visual-options'.
541 *** Added Eshell-Tramp module
542 External su and sudo commands are now the default; the internal,
543 Tramp-using variants can still be used by enabling the eshell-tramp
548 *** New option `f90-smart-end-names'.
550 ** Icomplete is a bit more like Ido.
552 *** key bindings to navigate through and select the completions.
554 *** The icomplete-separator is customizable, and its default has changed.
556 *** Removed icomplete-show-key-bindings.
558 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
559 (setq icomplete-with-completion-tables '(internal-complete-buffer))
560 will revert to the old behavior.
564 *** Ido has a manual now.
566 *** `ido-use-virtual-buffers' takes a new value 'auto.
568 *** `ido-decorations' has been slightly extended to give a bit more control.
573 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
574 visit the next image file and the previous image file in the same
575 directory, respectively.
577 *** New commands to show specific frames of multi-frame images.
578 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
579 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
581 *** New commands to speed up, slow down, or reverse animation.
583 *** The command `image-mode-fit-frame' deletes other windows.
584 When toggling, it restores the frame's previous window configuration.
585 It also has an optional frame argument, which can be used by Lisp
586 callers to fit the image to a frame other than the selected frame.
590 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
591 will cycle through faces in `hi-lock-face-defaults' without prompting.
594 *** New global command `M-s h .' (`highlight-symbol-at-point')
595 highlights the symbol found near point without prompting,
596 using the next face automatically.
600 *** New option `imenu-generic-skip-comments-and-strings'.
604 *** New face `info-index-match' is used to highlight matches in index
605 entries displayed by `Info-index-next', `Info-virtual-index' and
610 *** Better indentation of multiple-variable declarations.
611 If declaration spans several lines, variables on the following lines
612 are lined up to the first one.
614 *** We now recognize and better indent continuations in array
617 *** New option `js-switch-indent-offset`.
619 ** MH-E has been updated to MH-E version 8.5.
620 See MH-E-NEWS for details.
624 *** Font locking for texinfo comments and new keywords
625 *** Completion in Octave file buffers
627 *** Jump to definition
628 *** Documentation lookup/search
629 *** Code cleanup and various bug fixes
631 ** OPascal mode is the new name for Delphi mode.
633 *** All delphi-* variables and functions have been renamed to opascal-*.
634 *** `delphi-newline-always-indents' is not supported any more.
635 Use `electric-indent-mode' instead.
636 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
640 *** The format of `archive-contents' files, generated by package
641 repositories, has changed to allow a new (fifth) element in the data
642 vectors, containing an associative list with extra properties.
644 *** `describe-package' buffer uses the `:url' extra property to
645 display a `Homepage' header, if it's present.
647 *** In the buffer produced by `describe-package', there are now buttons
648 listing the keywords related to that package. You can click on them
649 to see other packages related to any given keyword.
651 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
652 the packages by a keyword.
656 *** `prolog-use-smie' has been removed, along with the non-SMIE
661 *** The new command `remember-notes' creates a buffer which is saved
664 You may think of it as a *scratch* buffer whose content is preserved.
665 In fact, it was designed as a replacement for *scratch* buffer and can
666 be used that way by setting `initial-buffer-choice' to
667 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
668 Without the second change, *scratch* buffer will still be there for
669 notes that do not need to be preserved.
671 *** The Remember package can now store notes in separates files.
672 You can use the new function `remember-store-in-files' within the
673 `remember-handler-functions' option.
675 See `remember-data-directory' and `remember-directory-file-name-format'
676 for new options related to this function.
680 *** Customize `rmail-mbox-format' to influence some minor aspects of
681 how Rmail displays non-MIME messages.
684 *** The `unrmail' command now converts from BABYL to mboxrd format,
685 rather than mboxo. Customize `unrmail-mbox-format' to change this.
689 *** New option `ruby-encoding-magic-comment-style'.
691 *** New option `ruby-custom-encoding-magic-comment-template'.
695 *** Improved syntax highlighting and indentation.
697 *** Add more Ruby file types to `auto-mode-alist'.
699 *** New option `ruby-align-to-stmt-keywords'.
701 *** New `electric-indent-mode' integration.
703 ** Search and Replace
706 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
707 starts a symbol (identifier) incremental search forward with the
708 symbol found near point added to the search string initially.
711 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
712 and adds it to the search string.
714 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
715 between nil and the value of the option `search-invisible' (or `open'
718 *** `query-replace' skips invisible text when `search-invisible' is nil,
719 and opens overlays with hidden text when `search-invisible' is `open'.
722 *** A negative prefix arg of replacement commands replaces backward.
723 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
724 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
727 *** By default, prefix arguments do not now terminate Isearch mode.
728 Set `isearch-allow-prefix' to nil to restore old behavior.
731 *** More Isearch commands accept prefix arguments, namely
732 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
736 *** Word search now matches whitespace at the beginning/end
737 of the search string if it contains leading/trailing whitespace.
738 In an incremental word search or when using a non-nil LAX argument
739 of `word-search-regexp', the lax matching can also match part of
740 the first word (in addition to the lax matching of the last word).
741 The same rules are now applied to the symbol search with the difference
742 that it matches symbols, and non-symbol characters between symbols.
747 *** New command `ses-rename-cell' allows assigning names to SES cells.
751 *** `explicit-bash-args' now always defaults to use --noediting.
752 During initialization, Emacs no longer expends a process to decide
753 whether it is safe to use Bash's --noediting option. These days
754 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
758 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
759 You can pick the name of the function and the variables with `C-x 4 a'.
761 *** The SMIE indentation engine is now used by default.
763 ** SMIE indentation can be customized via `smie-config'.
764 The customization can be guessed by Emacs by providing a sample indented
765 file and letting SMIE learn from it.
769 *** New option `term-suppress-hard-newline'.
771 ** Todo mode has been rewritten and enhanced.
772 New features include:
773 - support for multiple todo files and archive files of done items;
774 - renaming, reordering, moving, merging, and deleting categories;
775 - sortable tabular summaries of categories and the types of items they contain;
776 - cross-category lists of items filtered by specific criteria;
777 - more fine-grained interaction with the Emacs diary, by being able to decide
778 for each todo item whether it appears in the Fancy Diary display;
779 - highly flexible new item insertion and item editing;
780 - moving items between categories, storing done items in their category or in
781 archive files, undoing or unarchiving done items;
782 - reprioritizing items by inputting a numerical priority;
783 - extensive customizability of operation and display, including numerous faces.
784 The Todo mode user manual describes all commands and most user options.
785 To support some of these features, a new file format is used, which is
786 incompatible with the old format; however, you can convert old todo and done
787 item files to the new format on initializing the first new todo file, or at any
788 later time with the provided conversion command. The old version of
789 todo-mode.el has been made obsolete and renamed otodo-mode.el.
791 ** trace-function was largely rewritten.
792 New features include:
793 - no prompting for the destination buffer, unless a prefix-arg was used.
794 - additionally to prompting for a destination buffer, when a prefix-arg is
795 used, the user can enter a "context", i.e. Lisp expression whose value at the
796 time the function is entered/exited will be printed along with the function
797 name and arguments. Useful to trace the value of (current-buffer) or
798 (point) when the function is invoked.
802 *** The experimental url syntax for remote file names is withdrawn.
805 *** New connection method "adb", which allows to access Android
806 devices by the Android Debug Bridge. The variable `tramp-adb-program'
807 can be used to adapt the path of the "adb" program, if needed.
809 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
810 "scpc" and "rsyncc" are discontinued. The ssh option
811 "ControlMaster=auto" is set automatically in all ssh-based methods,
815 *** Handlers for `file-acl' and `set-file-acl' for remote machines
816 which support POSIX ACLs.
819 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
820 for remote machines which support filesystem notifications.
822 ** New command `url-cookie-list' displays all the current cookies, and
823 allows deleting selected cookies.
825 ** VC and related modes
828 *** In VC directory mode, `D' displays diffs between VC-controlled
829 whole tree revisions.
832 *** In VC directory mode, `L' lists the change log for the current VC
833 controlled tree in a window.
836 *** In VC directory mode, `I' shows a log of changes that will be
837 received with a pull operation.
840 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
841 under current version control system. When called with a prefix
842 argument, you can remove a file from the ignored file list.
845 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
846 because it is moved to vc-cvs.el.
850 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
852 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
856 *** The commands `woman-default-faces' and `woman-monochrome-faces'
857 are obsolete. Customize the `woman-*' faces instead.
859 ** Obsolete packages:
861 *** Iswitchb is made obsolete by icomplete-mode.
863 *** longlines.el is obsolete; use visual-line-mode instead.
868 *** terminal.el is obsolete; use term.el instead.
870 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
872 *** xesam.el is obsolete, because the XESAM project has been canceled.
875 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
878 *** The Info-edit command is obsolete. Editing Info nodes by hand
879 has not been relevant for some time.
882 * New Modes and Packages in Emacs 24.4
884 ** New package `eww' is a built-in web browser.
885 It is only available if Emacs is compiled with libxml2 support.
887 ** New minor mode `superword-mode', defined in subword.el
888 `superword-mode' overrides the default word motion commands to treat
889 symbol_words as a single word, similar to what `subword-mode' does and
890 using the same internal functions.
892 ** New package nadvice.el offers lighter-weight advice facilities.
894 - add-function/remove-function which can be used to add/remove code on any
895 function-carrying place, such as process-filters or `<foo>-function' hooks.
896 - advice-add/advice-remove to add/remove a piece of advice on a named function,
897 much like `defadvice' does.
899 ** New package frameset.el.
900 It provides a set of operations to save a frameset (the state of all
901 or a subset of the existing frames and windows, somewhat similar to a
902 frame configuration), both in-session and persistently, and restore it
903 at some point in the future.
906 ** New package filenotify.el provides an interface for file system
907 notifications. It requires that Emacs be compiled with one of the
908 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
911 * Incompatible Lisp Changes in Emacs 24.4
914 ** `kill-region' lost its `yank-handler' optional argument.
917 ** `(input-pending-p)' no longer runs other timers which are ready to
918 run. The new optional CHECK-TIMERS param allows for the prior behavior.
921 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
924 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
925 Some languages match those as »...« and others as «...» so better stay neutral.
928 ** In compiled Lisp files, the header no longer includes a timestamp.
931 ** The default file coding for Emacs Lisp files is now utf-8.
932 (See `file-coding-system-alist'.) In most cases, this change is
933 transparent, but files that contain unusual characters without
934 specifying an explicit coding system may fail to load with obscure
935 errors. You should either convert them to utf-8 or add an explicit
939 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
940 It used to disable the minor mode, major mode, and text-property keymaps,
941 whereas now it simply has higher precedence.
943 ** Default process filters and sentinels are not nil any more.
944 Instead they default to a function which does what the nil value used to do.
947 ** `read-event' does not return decoded chars in ttys any more.
948 As was the case in Emacs 22 and before, the decoding of terminal
949 input, according to `keyboard-coding-system', is not performed in
950 `read-event' any more. But unlike in Emacs 22, this decoding is still
951 done before input-decode-map, function-key-map, etc.
954 ** Removed `inhibit-local-menu-bar-menus'.
957 ** Frame-local variables that affect redisplay do not work any more.
958 More specifically, the redisplay does not bother to check for a frame-local
959 value when looking up variables.
962 ** nil and "unbound" are indistinguishable in `symbol-function'.
963 `symbol-function' does not signal a `void-function' error any more.
964 To determine if a symbol's function definition is void, use `fboundp'.
967 ** `defadvice' does not honor the `freeze' flag and cannot advise
968 special-forms any more.
971 ** `dolist' no longer binds VAR while evaluating the RESULT form,
972 when lexical binding is enabled. Previously, VAR was bound to nil,
973 which often led to spurious unused-variable warnings.
976 ** The return value of `backup-buffer' has changed.
977 The second argument is no longer an SELinux context, instead it is an
978 alist of extended attributes as returned by the new function
979 `file-extended-attributes'. The attributes can be applied to another
980 file using `set-file-extended-attributes'.
983 ** By default `copy-file' no longer copies file permission bits to an
984 existing destination; and it sets the file permission bits of a newly
985 created destination to those of the source, masked by the default file
986 permissions. To copy the file permission bits, pass t as the
987 PRESERVE-PERMISSIONS argument of `copy-file'.
990 ** `visited-file-modtime' now returns -1 for nonexistent files.
991 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
992 in the presence of files with negative time stamps.
995 ** The cars of the elements in `interpreter-mode-alist' are now
996 treated as regexps rather than literal strings.
999 * Lisp Changes in Emacs 24.4
1002 ** The second argument of `eval' can now specify a lexical environment.
1005 ** New functions `special-form-p' and `macrop'.
1007 ** New macro `define-alternatives' can be used to define generic commands.
1008 Generic commands are interactive functions whose implementation can be
1009 selected among several alternatives, as a matter of user preference.
1011 ** The `defalias-fset-function' property lets you catch `defalias'
1012 calls, and redirect them to your own function, instead of `fset'.
1015 ** New variable `enable-dir-local-variables'.
1016 Directory-local variables are ignored if this is nil. This may be
1017 useful for modes that want to ignore directory-locals while still
1018 respecting file-local variables.
1021 ** New function `get-pos-property'.
1023 ** Completion changes
1025 *** The separator for `completing-read-multiple' can now be a regexp.
1026 The default separator has been changed to allow surrounding spaces
1029 *** The `common-substring' arg of `display-completion-list' is obsolete.
1030 Either use `completion-all-completions', which returns highlighted
1031 strings (including for partial or substring completion), or call
1032 `completion-hilit-commonality' to add the highlight.
1034 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1035 let you enable symbol prettification (replacing a string like "lambda" with
1036 the Greek lambda character).
1041 *** Functions to pop up menus and dialogs now work on all terminals,
1042 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1043 `message-box', `yes-or-no-p', etc.
1045 The function `display-popup-menus-p' will now return non-nil for a
1046 display or frame whenever a mouse is supported on that display or
1049 *** New hook `tty-setup-hook'.
1053 *** New display action function `display-buffer-no-window' to not
1054 display the buffer in a window.
1056 *** New display action alist entry `allow-no-window' to indicate the
1057 caller of `display-buffer' is ready to handle the case of not
1058 displaying the buffer in a window.
1060 ** New hook `pre-redisplay-function'.
1063 ** New bool-vector set operation functions:
1064 *** `bool-vector-exclusive-or'
1065 *** `bool-vector-union'
1066 *** `bool-vector-intersection'
1067 *** `bool-vector-set-difference'
1068 *** `bool-vector-not'
1069 *** `bool-vector-subsetp'
1070 *** `bool-vector-count-consecutive'
1071 *** `bool-vector-count-population'
1074 ** Comparison functions =, <, >, <=, >= now take many arguments.
1076 ** Error-handling changes
1079 *** New function `define-error'.
1081 *** `with-demoted-errors' takes an additional argument `format'.
1084 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
1086 ** New library subr-x.el for misc helper functions
1088 *** `hash-table-keys'
1090 *** `hash-table-values'
1092 *** `string-blank-p`
1093 *** `string-empty-p`
1095 *** `string-reverse`
1096 *** `string-trim-left'
1097 *** `string-trim-right'
1099 *** `string-remove-prefix'
1100 *** `string-remove-suffix'
1103 ** Obsoleted functions:
1106 *** `lisp-complete-symbol'
1107 *** `field-complete'
1108 *** `minibuffer-completion-contents'
1109 *** `isearch-nonincremental-exit-minibuffer'
1110 *** `isearch-filter-visible'
1111 *** `generic-make-keywords-list'
1112 *** `get-upcase-table' (use `case-table-get-table' instead).
1114 ** `with-wrapper-hook' is obsoleted by `add-function'.
1115 The few hooks that used with-wrapper-hook are replaced as follows:
1116 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1117 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1118 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1121 ** `byte-compile-interactive-only-functions' is now obsolete.
1122 To specify that a command should only be called interactively, give it
1123 a non-nil `interactive-only' property.
1126 ** `split-string' now takes an optional argument TRIM.
1127 The value, if non-nil, is a regexp that specifies what to trim from
1128 the start and end of each substring.
1130 ** New function `string-suffix-p'.
1132 ** File-handling changes
1135 *** Support for filesystem notifications.
1136 Emacs now supports notifications of filesystem changes, such as
1137 creation, modification, and deletion of files. This requires the
1138 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1139 MS-Windows systems, this is supported for Windows XP and newer
1143 *** The 9th element returned by `file-attributes' is now unspecified.
1144 Formerly, it was t if the file's gid would change if file were deleted
1145 and recreated. This value has been inaccurate for years on many
1146 platforms, and nobody seems to have noticed or cared.
1149 *** The 6th argument to `copy-file' has been renamed to
1150 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1151 Unix file permission bits as well as SELinux context.
1154 *** The function `file-ownership-preserved-p' now has an optional
1155 argument GROUP which causes it check for file group too. This can be
1156 used in place of the 9th element of `file-attributes'.
1159 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1160 argument, with the same interpretation as the returned value of
1161 `visited-file-modtime'.
1163 ** Changes in autorevert.el
1166 *** If Emacs is compiled with file notification support, notifications
1167 are used instead of checking the time stamp of the files. You can
1168 disable this by setting the user option `auto-revert-use-notify' to
1169 nil. Alternatively, a regular expression of directories to be
1170 excluded from file notifications can be specified by
1171 `auto-revert-notify-exclude-dir-regexp'.
1174 *** The new user option `auto-revert-remote-files' enables reversion
1175 of remote files when set to non-nil.
1179 *** The function `face-spec-set' is now like `setq' for face specs.
1180 Its third arg now accepts values specifying a face spec type (defface,
1181 custom, or override spec), and the relevant spec is set accordingly.
1184 *** New function `add-face-text-property', which can be used to
1185 conveniently prepend/append new face properties.
1187 *** Face specs set via Custom themes now replace the `defface' spec
1188 rather than inheriting from it (as do face specs set via Customize).
1190 *** New face characteristic (supports :underline (:style wave))
1191 specifies whether or not the terminal can display a wavy line.
1194 *** New face spec attribute :distant-foreground
1195 specifies foreground to use if background color is near the foreground
1196 color that would otherwise have been used.
1201 *** `image-animated-p' is now `image-multi-frame-p'.
1202 It returns non-nil for any image that contains multiple frames,
1203 whether or not it specifies a frame delay.
1206 *** New variable `image-default-frame-delay' gives the frame delay for
1207 animated images which do not specify a frame delay.
1210 *** New functions `image-current-frame' and `image-show-frame' for getting
1211 and setting the current frame of a multi-frame image.
1215 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1216 **** object-name -> eieio-object-name
1217 **** object-class -> eieio-object-class
1218 **** object-class-fast -> eieio--object-class
1219 **** object-name-string -> eieio-object-name-string
1220 **** object-num-slots -> eieio--object-num-slots
1221 **** object-set-name-string -> eieio-object-set-name-string
1222 **** class-parent -> eieio-class-parent
1223 **** class-parents -> eieio-class-parents
1224 **** class-children -> eieio-class-children
1225 **** class-num-slots -> eieio--class-num-slots
1226 **** class-precedence-list -> eieio-class-precedence-list
1227 **** All generated class-* and object-* field accessors are now
1228 prefixed with `eieio-' as well.
1230 *** Obsoleted functions:
1232 **** class-direct-subclasses
1233 **** class-direct-superclasses
1235 ** Changes in encoding and decoding of text
1238 *** New coding-system `prefer-utf-8'.
1239 This is like `undecided' but prefers UTF-8 on decoding if the text to
1240 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1241 any non-ASCII characters are automatically encoded as UTF-8.
1244 *** New attributes of coding-systems whose type is `undecided'.
1245 Two new attributes, `:inhibit-null-byte-detection' and
1246 `:inhibit-iso-escape-detection', determine how to detect encoding of
1247 text that includes null bytes and ISO-2022 escape sequences,
1248 respectively. Each of these attributes can be either nil, zero, or
1249 t. If it is t, decoding text ignores null bytes and, respectively,
1250 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1251 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1252 text is encoded in one of the ISO-2022 encodings, such as
1253 iso-2022-7bit. If the value is zero, Emacs consults the variables
1254 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1256 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1257 UTF-8 encoding and decoding, whenever possible.
1259 These attributes are only meaningful for coding-systems of type
1260 `undecided'. (The type of a coding-system is determined by its
1261 `:coding-type' attribute and can be accessed by calling the
1262 `coding-system-type' function.)
1264 ** `time-to-seconds' is not obsolete any more.
1266 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1267 When you edit DIR/FILE, Emacs normally creates a symbolic link
1268 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1269 is being edited. Formerly, if there was already a non-symlink file
1270 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1271 through DIR/.#FILE.9. These fallbacks have been removed, so that
1272 Emacs now no longer locks DIR/FILE in that case.
1274 On file systems that do not support symbolic links, the lock is now a
1275 regular file with contents being what would have been in the symlink.
1278 ** New functions `group-gid' and `group-real-gid'.
1280 ** The spelling of the rx.el category `chinese-two-byte' has been
1281 corrected (the first 'e' was missing).
1283 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1286 *** The package descriptor and name of global variables, constants,
1287 and functions should be separated by two hyphens if the symbol is not
1288 meant to be used by other packages.
1291 * Changes in Emacs 24.4 on Non-Free Operating Systems
1293 ** The procedure for building Emacs on MS-Windows has changed.
1294 It is now built by running the same configure script as on all other
1295 platforms. This requires the MSYS environment and MinGW development
1296 tools. See the updated instructions in nt/INSTALL for details.
1298 Using the Posix configure script and Makefile's also means a change in
1299 the directory structure of the Emacs installation on Windows. It is
1300 now the same as on GNU and Unix systems. In particular, the auxiliary
1301 programs, such as cmdproxy.exe and hexl.exe, are in
1302 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1303 version), version-independent site-lisp is in share/emacs/site-lisp,
1304 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1305 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1306 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1307 directories and will find the files in there automatically; there's no
1308 need to set any variables due to this change.)
1311 ** Emacs on Windows 2000 and later can now access files and directories
1312 whose names cannot be encoded in the current system codepage.
1314 The new variable `w32-unicode-filenames' controls this feature: if it
1315 is t, Emacs uses Unicode APIs to pass file names to system calls,
1316 which lifts the limitation of file names to the current locale.
1319 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1320 The backtrace is written to the 'emacs_backtrace.txt' file in the
1321 directory where Emacs was running.
1324 ** The variable `buffer-file-type' is no longer supported.
1325 Setting it has no effect, and %t in the mode-line format is ignored.
1326 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1327 modifying it has no effect.
1330 ** Lock files now work on MS-Windows.
1331 This allows to avoid losing your edits if the same file is being
1332 edited in another Emacs session or by another user. See the node
1333 "Interlocking" in the Emacs User Manual for the details. To disable
1334 file locking, customize `create-lockfiles' to nil.
1336 ** Improved fullscreen support on Mac OS X.
1337 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1338 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1339 native is the default.
1341 ** OSX >= 10.7 can use sRGB colorspace.
1342 Customize `ns-use-srgb-colorspace' to change style. t is the default.
1343 Note: This does not apply to images.
1346 * Installation Changes in Emacs 24.3
1348 ** The default X toolkit is now Gtk+ version 3.
1349 If you don't pass `--with-x-toolkit' to configure, or if you use
1350 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1351 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1352 You can explicitly require a specific version by passing
1353 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1355 ** New configure option `--enable-link-time-optimization', to utilize
1356 an appropriate feature provided by GCC since version 4.5.0.
1358 ** New configure option `--without-all' to disable most of the optional
1359 features (image support, etc.) that are normally enabled by default.
1361 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1362 Emacs). If building with GCC, this enables compile-time checks that
1363 warn/give errors about possibly-questionable C code. On a recent GNU
1364 system there should be no warnings; on older and on non-GNU systems
1365 the results may be useful to developers.
1367 ** The configure option `--enable-use-lisp-union-type' has been
1368 renamed to `--enable-check-lisp-object-type', as the resulting
1369 Lisp_Object type no longer uses a union to implement the compile time
1370 check that this option enables.
1372 ** The configure option `--disable-maintainer-mode' has been removed,
1373 as it was confusingly-named and rarely useful.
1375 ** The configure options `--program-prefix', `--program-suffix', and
1376 `--program-transform-name' apply to more than just the installed
1377 binaries. Now they also affect the man pages, icons, and the
1378 etc/emacs.desktop file; but not the info pages, since this would break
1379 links between the various manuals.
1381 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1382 overwriting "emacs" in the installation bin/ directory with a link
1385 ** Emacs uses libtinfo in preference to libncurses, if available.
1387 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1388 /usr/pkg/lib to the linker search path. You must add them yourself if
1391 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1392 (from the bin and libexec directories, respectively). The former is
1393 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1396 * Startup Changes in Emacs 24.3
1398 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1399 lisp/ directory. There should not be any there anyway. If you have
1400 been adding them there, put them somewhere else; e.g., site-lisp.
1402 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1405 * Changes in Emacs 24.3
1409 *** `C-h f' (`describe-function') can now perform autoloading.
1410 When this command is called for an autoloaded function whose docstring
1411 contains a key substitution construct, that function's library is
1412 automatically loaded, so that the documentation can be shown
1413 correctly. To disable this, set `help-enable-auto-load' to nil.
1415 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1416 even after their associated libraries have been loaded (and the
1417 autoloads have been redefined as functions).
1421 *** Images displayed via ImageMagick now support transparency and the
1422 :background image specification property.
1424 *** When available, ImageMagick support is automatically enabled.
1425 It is no longer necessary to call `imagemagick-register-types'
1426 explicitly to install ImageMagick image types; that function is called
1427 automatically at startup, or when customizing an imagemagick- option.
1429 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1430 ImageMagick to view images. (You must call `imagemagick-register-types'
1431 afterwards if you do not use customize to change this.)
1433 *** The new variable `imagemagick-enabled-types' also affects which
1434 ImageMagick types are treated as images. The function
1435 `imagemagick-filter-types' returns the list of types that will be
1440 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1441 next and previous path separator, respectively.
1443 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1444 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1445 non-nil before enabling the mode.
1449 *** New option `mode-line-default-help-echo' specifies the help text
1450 (shown in a tooltip or in the echo area) for any part of the mode line
1451 that does not have its own specialized help text.
1453 *** You can now click mouse-3 in the coding system indicator to invoke
1454 `set-buffer-file-coding-system'.
1456 ** Server and client
1458 *** emacsclient now obeys string values for `initial-buffer-choice',
1459 if it is told to open a new frame without specifying any file to visit
1460 or expression to evaluate.
1462 *** New option `server-auth-key' specifies a shared server key.
1464 ** Emacs now generates backtraces on fatal errors.
1465 On encountering a fatal error, Emacs now outputs a textual description
1466 of the fatal signal, and a short backtrace on platforms like glibc
1467 that support backtraces.
1469 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1470 This minor mode replaces `toggle-read-only', which is now obsolete.
1472 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1473 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1474 respectively, without exiting from the prompt.
1476 ** In the Package Menu, newly-available packages are listed as "new",
1477 and sorted above the other "available" packages by default.
1479 ** If your Emacs was built from a repository checkout, the new variable
1480 `emacs-bzr-version' contains information about the bzr revision used.
1482 ** New option `create-lockfiles' specifies usage of lockfiles.
1483 It defaults to t. Changing it to nil inhibits the creation of lock
1484 files (use this with caution).
1486 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1487 variables on remote hosts.
1489 ** The entry for PCL-CVS has been removed from the Tools menu.
1490 The PCL-CVS commands are still available via the keyboard.
1492 ** Using "unibyte: t" in Lisp source files is obsolete.
1493 Use "coding: raw-text" instead.
1495 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1496 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1497 The previous binding, introduced in Emacs 24.1, was a mistake, because
1498 `C-c LETTER' bindings are reserved for user customizations.
1500 ** Internationalization
1502 *** New language environment: Persian.
1504 *** New input method `vietnamese-vni'.
1506 ** Nextstep (GNUstep / Mac OS X) port
1508 *** Support for fullscreen and the frame parameter fullscreen.
1510 *** A file dialog is used for open/save operations initiated from the
1514 * Editing Changes in Emacs 24.3
1516 ** Search and Replace
1518 *** Non-regexp Isearch now performs "lax" space matching.
1519 Each sequence of spaces in the supplied search string may match any
1520 sequence of one or more whitespace characters, as specified by the
1521 variable `search-whitespace-regexp'. (This variable is also used by a
1522 similar existing feature for regexp Isearch.)
1524 *** New Isearch command `M-s SPC' toggles lax space matching.
1525 This applies to both ordinary and regexp Isearch.
1527 *** New option `replace-lax-whitespace'.
1528 If non-nil, `query-replace' uses flexible whitespace matching too.
1531 *** Global `M-s _' starts a symbol (identifier) incremental search,
1532 and `M-s _' in Isearch toggles symbol search mode.
1533 `M-s c' in Isearch toggles search case-sensitivity.
1535 ** Navigation commands
1537 *** New binding `M-g c' for `goto-char'.
1539 *** New binding `M-g TAB' for `move-to-column'.
1541 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1542 interactively with no prefix arg. Previously, it moved to column 1.
1544 ** New option `yank-handled-properties' allows processing of text
1545 properties on yanked text, in ways that are more general than just
1546 removing them (as is done by `yank-excluded-properties').
1548 ** New option `delete-trailing-lines' specifies whether
1549 M-x delete-trailing-whitespace should delete trailing lines at the end
1550 of the buffer. It defaults to t.
1552 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1554 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1555 `ucs-insert' is now an obsolete alias for `insert-char'.
1557 ** The `z' key no longer has a binding in most special modes.
1558 It used to be bound to `kill-this-buffer', but `z' is too easy to
1561 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1562 It copies the region-rectangle as the last rectangle kill.
1566 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1568 *** New option `register-separator' specifies the register containing
1569 the text to put between collected texts for use with
1570 M-x append-to-register and M-x prepend-to-register.
1573 * Changes in Specialized Modes and Packages in Emacs 24.3
1575 ** Common Lisp emulation (CL)
1577 *** CL's main entry is now (require 'cl-lib).
1578 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1579 i.e., all its definitions have the "cl-" prefix (and internal definitions
1580 use the "cl--" prefix).
1582 If `cl' provided a feature under the name `foo', then `cl-lib'
1583 provides it under the name `cl-foo' instead; with the exceptions of the
1584 few `cl' definitions that had to use `foo*' to avoid conflicts with
1585 pre-existing Elisp entities. These have been renamed to `cl-foo'
1586 rather than `cl-foo*'.
1588 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1589 provide the old, non-prefixed names. Some exceptions are listed below:
1591 *** `cl-flet' is not like `flet' (which is deprecated).
1592 Instead it obeys the behavior of Common-Lisp's `flet'.
1593 In particular, in cl-flet function definitions are lexically scoped,
1594 whereas in flet the scoping is dynamic.
1596 *** `cl-labels' is slightly different from `labels'.
1597 The difference is that it relies on the `lexical-binding' machinery
1598 (as opposed to the `lexical-let' machinery used previously) to capture
1599 definitions in closures, so such closures will only work if `lexical-binding'
1602 *** `cl-letf' is not exactly like `letf'.
1603 The only difference is in details that relate to some deprecated usage
1604 of `symbol-function' in place forms.
1606 *** `progv' was rewritten to use the `let' machinery.
1607 A side effect is that variables without corresponding values are bound
1608 to nil rather than being made unbound.
1610 *** The following methods of extending `setf' are obsolete
1611 (use features from gv.el instead):
1612 `define-modify-macro' (use `gv-letplace')
1613 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1614 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1615 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1619 *** Changes are now highlighted using the same color scheme as in
1620 modern VCSes. Deletions are displayed in red (new faces
1621 `diff-refine-removed' and `smerge-refined-removed', and new definition
1622 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1623 and `smerge-refined-added', and new definition of `diff-added').
1625 *** The variable `diff-use-changed-face' defines whether to use the
1626 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1627 changes in context diffs.
1629 *** The new command `diff-delete-trailing-whitespace' removes trailing
1630 whitespace introduced by a diff.
1632 ** Ediff now uses the same color scheme as Diff mode.
1636 A new version of python.el, which provides several new features, including:
1637 per-buffer shells, better indentation, Python 3 support, and improved
1638 shell-interaction compatible with iPython (and virtually any other
1641 *** Some user options have been replaced/renamed, including (old -> new):
1642 **** python-indent -> python-indent-offset
1643 **** python-guess-indent -> python-indent-guess-indent-offset
1644 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1645 **** python-use-skeletons -> python-skeleton-autoinsert
1647 *** Some user options have been removed, including:
1649 **** `python-indent-string-contents': Strings are never indented.
1651 **** `python-honour-comment-indentation':
1652 Comments are always considered as indentation markers.
1654 **** `python-continuation-offset': Indentation is automatically
1655 calculated in a pep8 compliant way depending on the context.
1657 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1658 Have no direct mapping as the shell interaction is completely different.
1660 **** `python-python-command', `python-jython-command':
1661 Replaced by `python-shell-interpreter'.
1663 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1664 `python-pdbtrack-minor-mode-string', `python-source-modes':
1667 *** Some commands have been replaced (old -> new):
1668 **** python-insert-class -> python-skeleton-class
1669 **** python-insert-def -> python-skeleton-def
1670 **** python-insert-for -> python-skeleton-for
1671 **** python-insert-if -> python-skeleton-if
1672 **** python-insert-try/except -> python-skeleton-try
1673 **** python-insert-try/finally -> python-skeleton-try
1674 **** python-insert-while -> python-skeleton-while
1675 **** python-find-function -> python-nav-jump-to-defun
1676 **** python-next-statement -> python-nav-forward-sentence
1677 **** python-previous-statement -> python-nav-backward-sentence
1678 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1679 **** python-end-of-defun-function -> python-nav-end-of-defun
1680 **** python-send-buffer -> python-shell-send-buffer
1681 **** python-send-defun -> python-shell-send-defun
1682 **** python-send-region -> python-shell-send-region
1683 **** python-send-region-and-go -> emulate with python-shell-send-region
1684 and python-shell-switch-to-shell
1685 **** python-send-string -> python-shell-send-string
1686 **** python-switch-to-python -> python-shell-switch-to-shell
1687 **** python-describe-symbol -> python-eldoc-at-point
1691 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1693 *** The D-Bus object manager interface is implemented.
1695 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1696 if their value does not fit into Emacs's integer range.
1698 *** The function `dbus-call-method' is now non-blocking.
1699 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1701 *** Signals can also be sent as unicast messages.
1703 *** The argument list of `dbus-register-signal' has been extended,
1704 according to the new match rule types of D-Bus.
1706 *** `dbus-init-bus' supports private connections.
1708 *** There is a new function `dbus-setenv'.
1710 ** `desktop-path' no longer includes the "." directory.
1711 Desktop files are now located in ~/.emacs.d by default.
1715 *** `dired-do-async-shell-command' executes each file sequentially
1716 if the command ends in `;' (when operating on multiple files).
1717 Otherwise, it executes the command on each file in parallel.
1719 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1720 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1723 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1724 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1725 mark/unmark/flag all files in the active region.
1727 *** The minibuffer default for `=' (`dired-diff') has changed.
1728 It is now the backup file for the file at point, if one exists.
1729 In Transient Mark mode the default is the file at the active mark.
1731 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1732 The global binding for `M-=', `count-words-region' is in effect.
1736 *** New module "notifications", which can send a notification when you
1737 receive a private message or your nickname is mentioned.
1739 *** ERC will look up server/channel names via auth-source and use any
1742 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1743 only applies to messages sent by lurkers.
1745 ** reStructuredText mode
1747 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1748 fontification, comment handling, and customization have all been revised
1751 *** Support for `imenu' and `which-function-mode'.
1753 *** The reStructuredText syntax is more closely covered.
1754 Sphinx support has been improved.
1756 *** `rst-insert-list' inserts new list or continues existing lists.
1758 *** A negative prefix argument always works for `rst-adjust'.
1760 *** The window configuration is reset after displaying a TOC.
1762 *** The constant `rst-version' describes the rst.el package version.
1766 *** Support for percent literals and recognition of regular expressions
1767 in method calls without parentheses with more methods, including Cucumber
1770 *** Improved syntax highlighting and indentation.
1772 *** New command `ruby-toggle-block', bound to `C-c {'.
1774 *** Some non-standard keybindings/commands have been removed:
1776 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1778 **** `ruby-mark-defun'; use `mark-defun'.
1780 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1781 appropriate settings for the variables `beginning-of-defun-function'
1782 and `end-of-defun-function'.
1784 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1785 `reindent-then-newline-and-indent' and `newline' have been removed.
1787 ** Shell Script mode
1789 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1791 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1793 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1797 *** The free software compiler GHDL is supported (and now the default).
1799 *** Support for the VHDL-AMS packages has been added/updated.
1801 *** Updated to the 2002 revision of the VHDL standard.
1803 *** Accepts \r and \f as whitespace.
1807 *** The faces used by Apropos are now directly customizable.
1808 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1809 see the `apropos' Custom group for details.
1811 *** The old options whose values specified faces to use have been removed
1812 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1816 *** This package has been rewritten to use Tabulated List mode.
1818 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1819 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1823 *** Algebraic simplification mode is now the default.
1824 To restrict to the limited simplifications given by the former
1825 default simplification mode, use `m I'.
1829 *** You can customize the header text that appears above each calendar month.
1830 See the variable `calendar-month-header'.
1832 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1834 *** The calendars produced by cal-html include holidays.
1835 Customize `cal-html-holidays' to change this.
1839 *** The major modes from the parser generators "Bovine" and "Wisent"
1840 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1841 are in `auto-mode-alist', and the corresponding manuals are included.
1845 **** Menu support for the "Configuration" feature. This allows users to
1846 choose the active configuration (such as debug or install) from the menu.
1848 **** New command `ede-set' to interactively set project-local variables.
1850 **** Support for compiling, debugging, and running in "generic" projects.
1852 **** Autoconf editing support for M4 macros with complex arguments.
1854 **** Compilation support for the "linux" project type.
1856 **** "simple" projects have been removed; use "generic" projects instead.
1860 **** Support for parsing #include statements inside a namespace in C/C++.
1862 **** Improved support for 'extern "C"' declarations in C/C++.
1864 **** The ability to ignore more common special C/C++ preprocessor symbols,
1865 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1866 If available, include cdefs.h as an additional source of preprocessor symbols.
1868 **** Improved C/C++ function pointer parsing.
1870 **** In Python, support for converting imports to include file names.
1872 **** Ability to dynamically determine the Python load path.
1874 **** Support for the Python 'WITH' and 'AT' keywords.
1876 **** Improved tooltip completion.
1880 **** The SRecode manual is now included.
1882 **** Tag generation supports constructor/destructor settings and system
1883 include differentiation.
1885 **** Addition of 'Framework' support: Frameworks are specified when a
1886 particular kind of library (such as Android) is needed in a common language
1889 **** Support for nested templates and let variables override based on priority.
1891 **** Support for merging tables from multiple related modes, such as
1892 default -> c++ -> arduino.
1894 ** Compile has a new option `compilation-always-kill'.
1898 *** `custom-reset-button-menu' now defaults to t.
1900 *** Non-option variables are never matched in `customize-apropos' and
1901 `customize-apropos-options' (i.e., the prefix argument does nothing for
1902 these commands now).
1906 *** The variables `term-default-fg-color' and `term-default-bg-color'
1907 are now deprecated in favor of the customizable face `term'.
1909 *** You can customize how to display ANSI terminal colors and styles
1910 by customizing the corresponding `term-color-<COLOR>',
1911 `term-color-underline' and `term-color-bold' faces.
1915 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1917 *** Remote processes are now also supported on remote MS-Windows hosts.
1921 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1922 Previously, this slot stored semicolon-separated attribute-value pairs
1923 appended to some imap URLs, but this is not compatible with RFC 3986.
1924 So now the `filename' slot stores the entire path and query components,
1925 and the `attributes' slot is always nil.
1927 *** New function `url-encode-url' for encoding a URI string.
1928 The `url-retrieve' function now uses this to encode its URL argument,
1929 in case that is not properly encoded.
1931 ** notifications.el supports now version 1.2 of the Notifications API.
1932 The function `notifications-get-capabilities' returns the supported
1935 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1936 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1937 `flymake-warning-bitmap'.
1939 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1940 specifying URL types that should be converted to remote file names at
1941 the FFAP prompt. The default is now '("ftp").
1943 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1944 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1946 ** New option `mouse-avoidance-banish-position' specifies where the
1947 `banish' mouse avoidance setting moves the mouse.
1949 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1950 closing brackets to be aligned with the line of the opening bracket.
1952 ** In Proced mode, new command `proced-renice' renices marked processes.
1954 ** New option `async-shell-command-buffer' specifies the buffer to use
1955 for a new asynchronous `shell-command' when the default output buffer
1956 `*Async Shell Command*' is already in use.
1958 ** SQL mode has a new option `sql-db2-escape-newlines'.
1959 If non-nil, newlines sent to the command interpreter will be escaped
1960 by a backslash. The default does not escape the newlines and assumes
1961 that the sql statement will be terminated by a semicolon.
1963 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1964 (and modes that derive from it), sorts the column at point, or the Nth
1965 column if a numeric prefix argument is given.
1967 ** `which-func-modes' now defaults to t, so Which Function mode, when
1968 enabled, applies to all applicable major modes.
1970 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1973 ** Follow mode no longer works by using advice.
1974 The option `follow-intercept-processes' has been removed.
1976 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1978 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1979 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1980 *** semantic-change-hooks -> semantic-change-functions
1981 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1982 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1983 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1984 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1985 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1986 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1987 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1988 *** rcirc-activity-hooks -> rcirc-activity-functions
1989 *** rcirc-print-hooks -> rcirc-print-functions
1990 *** dbus-event-error-hooks -> dbus-event-error-functions
1991 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1992 *** checkdoc-style-hooks -> checkdoc-style-functions
1993 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1994 *** archive-extract-hooks -> archive-extract-hook
1995 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1996 *** hfy-post-html-hooks -> hfy-post-html-hook
1997 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1998 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1999 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2000 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2002 ** Obsolete packages
2005 In most cases, assoc+member+push+delq work just as well.
2006 And in any case it's just a terrible package: ugly semantics, terrible
2007 inefficiency, and not namespace-clean.
2016 * Incompatible Lisp Changes in Emacs 24.3
2018 ** Docstrings starting with `*' no longer indicate user options.
2019 Only variables defined using `defcustom' are considered user options.
2020 The function `user-variable-p' is now an obsolete alias for
2021 `custom-variable-p'.
2023 ** The return values of `defalias', `defun' and `defmacro' have changed,
2024 and are now undefined. For backwards compatibility, `defun' and
2025 `defmacro' currently return the name of the newly defined
2026 function/macro, but this should not be relied upon.
2028 ** `random' by default now returns a different random sequence in
2029 every Emacs run. Use `(random S)', where S is a string, to set the
2030 random seed to a value based on S, in order to get a repeatable
2031 sequence in later calls.
2033 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2034 that substring is inserted literally even if the LITERAL arg is
2035 non-nil, instead of causing an error to be signaled.
2037 ** `select-window' now always makes the window's buffer current.
2038 It does so even if the window was selected before.
2040 ** The function `x-select-font' can return a font spec, instead of a
2041 font name as a string. Whether it returns a font spec or a font name
2042 depends on the graphical library.
2044 ** `face-spec-set' no longer sets frame-specific attributes when the
2045 third argument is a frame (that usage was obsolete since Emacs 22.2).
2047 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2049 ** The CL package's `get-setf-method' function no longer exists.
2050 Generalized variables are now part of core Emacs Lisp, and implemented
2051 differently to the way cl.el used to do it. It is not possible to
2052 define a compatible replacement for `get-setf-method'. See the file
2053 gv.el for internal details of the new implementation.
2055 ** The arguments of `dbus-register-signal' are no longer just strings,
2056 but keywords or keyword-string pairs. The old argument list will
2057 still be supported for Emacs 24.x.
2059 ** Miscellaneous name changes
2060 Some Lisp symbols have been renamed to correct their spelling,
2061 or to be more consistent with standard Emacs terminology.
2063 *** Renamed functions
2064 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2065 **** inactivate-input-method -> deactivate-input-method
2066 **** quail-inactivate -> quail-deactivate
2067 **** robin-inactivate -> robin-deactivate
2068 **** viper-inactivate-input-method -> viper-deactivate-input-method
2069 **** viper-inactivate-input-method-action ->
2070 viper-deactivate-input-method-action
2071 **** ucs-input-inactivate -> ucs-input-deactivate
2074 The old hooks are still supported for backward compatibility, but they
2075 are deprecated and will be removed eventually.
2076 **** input-method-inactivate-hook -> input-method-deactivate-hook
2077 **** robin-inactivate-hook -> robin-deactivate-hook
2078 **** quail-inactivate-hook -> quail-deactivate-hook
2080 *** Renamed variables
2081 **** follow-deactive-menu -> follow-inactive-menu
2082 **** inactivate-current-input-method-function ->
2083 deactivate-current-input-method-function
2085 ** Some obsolete functions, variables, and faces have been removed:
2086 *** `last-input-char', `last-command-char', `unread-command-char'
2087 *** `facemenu-unlisted-faces'
2088 *** `rmail-decode-mime-charset'
2089 *** `iswitchb-read-buffer'
2090 *** `sc-version', `sc-submit-bug-report'
2091 *** `set-char-table-default'
2092 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2093 *** `compile-internal'
2095 *** `mode-line-inverse-video'
2096 *** `follow-mode-off-hook'
2097 *** `cvs-commit-buffer-require-final-newline'
2098 (use `log-edit-require-final-newline' instead)
2099 *** `cvs-changelog-full-paragraphs'
2100 (use `log-edit-changelog-full-paragraphs' instead)
2101 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2102 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2103 *** `vc-master-templates' (use `vc-handled-backends' instead)
2104 *** `vc-checkout-carefully'
2107 * Lisp Changes in Emacs 24.3
2109 ** CL-style generalized variables are now in core Elisp.
2110 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2111 You can define your own generalized variables using `gv-define-simple-setter',
2112 `gv-define-setter', etc.
2114 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2115 This can significantly speed up execution of non-byte-compiled code,
2116 but can also bump into previously unnoticed cyclic dependencies.
2117 These are generally harmless: they will simply cause the macro calls
2118 to be left for later expansion (as before), but will result in a
2119 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2120 You may wish to restructure your code so this does not happen.
2122 ** New sampling-based Elisp profiler.
2123 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2124 When finished, use M-x profiler-stop. The sampling rate can be based on
2125 CPU time or memory allocations.
2127 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2128 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2130 ** New macros `setq-local' and `defvar-local'.
2132 ** Face underlining can now use a wave.
2134 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2135 of `read-regexp' accepts a string ending with a colon and space, and its
2136 second argument DEFAULTS can be a list of strings accessible via `M-n'
2137 in the minibuffer ahead of other hard-coded useful regexp-related values.
2138 More commands use `read-regexp' now to read their regexp arguments.
2142 *** New function `completion-table-with-quoting' to handle completion
2143 in the presence of quoting, such as file completion in shell buffers.
2145 *** New function `completion-table-subvert' to use an existing completion
2146 table, but with a different prefix.
2150 *** New error type and new function `user-error'.
2151 These do not trigger the debugger.
2153 *** New option `debugger-bury-or-kill', saying what to do with the
2154 debugger buffer when exiting debug.
2156 *** Set `debug-on-message' to enter the debugger when a certain
2157 message is displayed in the echo area. This can be useful when trying
2158 to work out which code is doing something.
2160 *** New var `inhibit-debugger', automatically set to prevent accidental
2161 recursive invocations.
2165 *** New command `fit-frame-to-buffer' adjusts the frame height to
2168 *** The command `fit-window-to-buffer' can adjust the frame height
2169 if the new option `fit-frame-to-buffer' is non-nil.
2171 *** New macro `with-temp-buffer-window', similar to
2172 `with-output-to-temp-buffer'.
2174 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2177 *** New option `switch-to-buffer-preserve-window-point' to restore a
2178 window's point when switching buffers.
2180 *** New display action alist entries `window-height' and `window-width'
2181 specify the size of new windows created by `display-buffer'.
2183 *** New display action alist entry `pop-up-frame-parameters', if
2184 non-nil, specifies frame parameters to give any newly-created frame.
2186 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2187 tells display action functions to avoid changing which frame is
2190 *** New display action alist entry `previous-window', if non-nil,
2191 specifies window to reuse in `display-buffer-in-previous-window'.
2193 *** New display action functions `display-buffer-below-selected',
2194 and `display-buffer-in-previous-window'.
2196 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2197 now accept a third argument to avoid choosing the selected window.
2199 *** Additional values recognized for option `window-combination-limit'.
2201 *** The following variables are obsolete, as they can be replaced by
2202 appropriate entries in the `display-buffer-alist' function introduced
2204 **** `dired-shrink-to-fit'
2205 **** `display-buffer-reuse-frames'
2206 **** `display-buffer-function'
2207 **** `special-display-buffer-names'
2208 **** `special-display-frame-alist'
2209 **** `special-display-function'
2210 **** `special-display-regexps'
2214 *** `current-time-string' no longer requires that its argument's year
2215 must be in the range 1000..9999. It now works with any year supported
2216 by the underlying C implementation.
2218 *** `current-time' now returns extended-format time stamps
2219 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2220 PSEC is typically a multiple of 1000 on current machines. Other
2221 functions that use this format, such as `file-attributes' and
2222 `format-time-string', have been changed accordingly. Old-format time
2223 stamps are still accepted.
2225 *** The format of timers in `timer-list' and `timer-idle-list' is now
2226 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2227 The PSECS slot is new, and uses picosecond resolution. It can be
2228 accessed via the new `timer--psecs' accessor.
2230 *** Last-modified time stamps in undo lists now are of the form
2231 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2235 *** Improved security when handling persistent objects:
2237 **** `eieio-persistent-read' now features optional arguments for specifying
2238 the class to load, as well as a flag stating whether subclasses are allowed;
2239 if provided, other classes will be rejected by the reader. For
2240 compatibility with existing code, if the class is omitted only a
2243 **** New specialized reader for pulling in classes and signaling errors
2244 without evaluation of suspicious code.
2246 **** All slots that contain objects must have a :type. Slots with lists
2247 of objects must use a new type predicate for a list of an object type.
2249 *** Support for `find-function' and similar utilities, through the addition
2250 of filename support to generated symbols.
2252 ** Floating point functions now always return special values like NaN,
2253 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2254 Previously, they returned NaNs on some platforms but signaled errors
2255 on others. The affected functions are acos, asin, tan, exp, expt,
2256 log, log10, sqrt, and mod.
2258 ** New fringe bitmap `exclamation-mark'.
2260 ** Miscellaneous changes to special forms and macros
2262 *** `defun' and `defmacro' are now macros rather than special forms.
2264 *** `kbd' is now a function rather than a macro.
2266 ** Miscellaneous new functions
2268 *** `set-temporary-overlay-map' sets up a temporary keymap that
2269 takes precedence over most other maps for a short while (normally one key).
2271 *** `autoloadp' tests if its argument is an autoloaded object.
2273 *** `autoload-do-load' performs the autoloading operation.
2275 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2277 *** `file-name-base' returns a file name sans directory and extension.
2279 *** `function-get' fetches a function property, following aliases.
2281 *** `posnp' tests if an object is a `posn'.
2283 *** `system-users' returns the user names on the system.
2285 *** `system-groups' returns the group names on the system.
2287 *** `tty-top-frame' returns the topmost frame of a text terminal.
2289 ** The following functions and variables are obsolete:
2290 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2291 *** `buffer-has-markers-at'
2292 *** `macro-declaration-function' (use `macro-declarations-alist')
2293 *** `window-system-version' (provides no useful information)
2294 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2295 *** `query-replace-interactive'
2296 *** `font-list-limit' (has had no effect since Emacs < 23)
2299 * Changes in Emacs 24.3 on Non-Free Operating Systems
2301 ** Cygwin builds can use the native MS Windows user interface.
2302 Pass `--with-w32' to configure. The default remains the X11 interface.
2304 ** Two new functions are available in Cygwin builds:
2305 `cygwin-convert-file-name-from-windows' and
2306 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2307 code to access the Cygwin file-name mapping machinery to convert
2308 between Cygwin and Windows-native file and directory names.
2310 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2311 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2312 `mouse-autoselect-window'.
2314 ** On MS Windows Vista and later Emacs now supports symbolic links.
2316 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2317 support for libxml2, even if its presence is detected.
2319 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2321 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2322 directories to the search path. You must add them yourself if you want them.
2325 * Changes in Emacs 24.2
2327 ** This is mainly a bug-fix release.
2330 * Installation Changes in Emacs 24.1
2332 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2333 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2334 also depend on Gtk+. You can disable them with --without-rsvg and
2337 ** Emacs can be compiled with GnuTLS support.
2338 This happens by default if a suitably recent version of the library is
2339 found at build time. To prevent this, use the configure option
2340 `--without-gnutls'. See below for GnuTLS features.
2342 ** Emacs can be compiled with SELinux support.
2343 This happens by default if a suitably recent version of the library is
2344 found at build time. To prevent this, use the configure option
2345 `--without-selinux'. See below for SELinux features.
2347 ** Emacs can be compiled with ImageMagick support.
2348 This happens by default if a suitably recent version of the library is
2349 found at build time. To prevent this, use the configure option
2350 `--without-imagemagick'. See below for ImageMagick features.
2351 This feature is not available for the Nextstep or MS ports.
2353 ** Emacs can be compiled with libxml2 support.
2354 This happens by default if a suitably recent version of the library is
2355 found at build time. To prevent this, use the configure option
2356 `--without-xml2'. See below for libxml2 features.
2358 ** By default, the installed Info and man pages are compressed.
2359 You can disable this by configuring --without-compress-info.
2361 ** New configure option --with-wide-int.
2362 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2363 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2366 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2367 These provide no new functionality, they just remove the need to edit
2368 lib-src/Makefile by hand in order to use the associated features.
2370 ** New configure option --enable-use-lisp-union-type.
2371 This is only useful for Emacs developers to debug certain types of bugs.
2372 This is not a new feature; only the configure flag is new.
2374 ** The standalone programs digest-doc and sorted-doc are removed.
2375 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2377 ** The standalone program `fakemail' is removed.
2378 If you need it, feedmail.el provides a superset of the functionality.
2381 * Startup Changes in Emacs 24.1
2383 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2384 command line arguments, and the EMACS_UNIBYTE environment variable, no
2385 longer have any effect. (They were declared obsolete in Emacs 23.)
2387 ** New command line option `--no-site-lisp' removes site-lisp directories
2388 from load-path. -Q now implies this. This option does not affect the
2389 EMACSLOADPATH environment variable (and hence has no effect for
2393 * Changes in Emacs 24.1
2397 *** Many packages now use the `completion-at-point' command,
2398 rather than implementing separate completion commands.
2400 *** `completion-at-point' now handles tags and semantic completion.
2402 *** Completion in a non-minibuffer now tries to detect the end of completion
2403 and pops down the *Completions* buffer accordingly.
2405 *** New option `completion-cycle-threshold' allows completion cycling.
2407 *** New option `completion-category-overrides' for overriding the
2408 default completion style in certain circumstances.
2410 *** New completion style `substring'.
2412 *** Completion of buffer names uses `substring' completion by default.
2414 *** The option `widget-complete-field' has been removed.
2418 *** The first time you try sending mail, Emacs asks for a mail method.
2419 This is implemented by a new default for `send-mail-function', which
2420 is `sendmail-query-once'. This offers to use the smtpmail package, or
2421 to use the old defaults relying on external mail facilities
2422 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2423 `mailclient-send-it' on Windows).
2425 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2426 transfers the report to your desktop's preferred mail client, if there
2427 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2430 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2431 and Mail mode changes
2433 ** Emacs server and client changes
2435 *** New option `server-port' specifies the port for TCP Emacs servers.
2437 *** New emacsclient argument -q/--quiet suppresses some status messages.
2439 *** New emacsclient argument --frame-parameters specifies the frame
2440 parameters of any newly-created graphical frame.
2442 *** If emacsclient shuts down due to Emacs signaling an error,
2443 its exit status is 1.
2445 *** New emacsclient argument --parent-id ID.
2446 This opens a client frame in parent X window ID, via XEmbed, similar
2447 to the --parent-id argument to Emacs.
2449 ** Internationalization changes
2451 *** Emacs now supports display and editing of bidirectional text.
2452 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2453 displayed in the correct visual order as expected by users of those
2454 scripts. The display reordering is a "full bidirectionality" class
2455 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2456 with no RTL text should look exactly the same as before.
2458 **** New buffer-local variable `bidi-display-reordering'.
2459 To disable display reordering in a buffer, change this to nil.
2461 **** New buffer-local variable `bidi-paragraph-direction'.
2462 If nil (the default), Emacs determines the base direction of each
2463 paragraph from its text, as specified by the UBA. Setting the value
2464 to `right-to-left' or `left-to-right' forces a base direction on each
2467 Paragraphs with right-to-left base direction are displayed starting at
2468 the right window edge.
2470 *** Enhanced support for characters with no glyphs in available fonts,
2471 or, on text terminals, characters that cannot be encoded by the
2472 terminal coding system. The new option `glyphless-char-display-control'
2473 specifies how to display them: as a hexadecimal code in a box, a thin
2474 1-pixel space, an empty box, etc.
2476 *** New input methods for Farsi and Bulgarian
2477 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2479 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2480 (U+2010 and U+2011).
2482 *** New Hebrew translation of the Emacs Tutorial.
2483 Type `C-u C-h t' to choose it in case your language setup doesn't
2484 automatically select it.
2486 ** An Emacs Lisp package manager is now included.
2487 This is a convenient way to download and install additional packages,
2488 from a package repository at http://elpa.gnu.org.
2490 *** M-x list-packages shows a list of packages, which can be
2491 selected for installation.
2493 *** New command `describe-package', bound to `C-h P'.
2495 *** By default, all installed packages are loaded automatically when
2496 Emacs starts up. To disable this, set `package-enable-at-startup' to
2497 nil. To specify the packages to load, customize `package-load-list'.
2499 ** Custom theme changes
2501 *** New command `M-x customize-themes', which provides a convenient
2502 interface for enabling and disabling Custom themes.
2504 *** New option `custom-theme-load-path' is the load path for themes.
2505 Emacs no longer looks for Custom themes in `load-path'. The default
2506 value of `custom-theme-load-path' says to look for themes in
2507 `custom-theme-directory', followed by a subdirectory of
2508 `data-directory' named "themes/", which contains a small selection of
2509 built-in Custom themes.
2511 *** New option `custom-safe-themes' records known-safe theme files.
2512 If a theme is not in this list, Emacs queries before loading it, and
2513 offers to save the theme to `custom-safe-themes' automatically. By
2514 default, all themes included in Emacs are treated as safe.
2516 ** Improved GTK integration
2518 *** GTK scroll-bars are now placed on the right by default.
2519 The function `set-scroll-bar-mode' can change this.
2521 *** GTK tool bars can have just text, just images or images and text.
2522 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2523 the default is taken from desktop settings.
2525 *** GTK tool bars can be placed on any edge of the frame.
2526 The frame-parameter tool-bar-position controls this. It takes the
2527 values top, left, right or bottom. The Options => Show/Hide menu has
2530 *** The default colors for selected text (the `region' face) are taken
2531 from the GTK theme when Emacs is built with GTK.
2533 *** Emacs uses GTK tooltips by default if built with GTK.
2534 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2536 ** Graphical interface changes
2538 *** On graphical displays, the mode-line no longer ends in dashes.
2539 Also, the first dash (which does not indicate anything) is just
2540 displayed as a space.
2542 *** `menu-bar-select-buffer-function' lets you choose another operation
2543 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2545 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2546 built with Xft. These fonts can be set via X resources, for example:
2547 Emacs.pane.menubar.font: Courier-12
2551 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2552 or if it receives a SIGINT signal in batch mode.
2554 *** `kill-emacs-hook' is now also run in batch mode.
2555 Third-party code which adds to `kill-emacs-hook' should check if they
2556 do the right thing in batch mode.
2558 ** Scrolling changes
2560 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2561 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2562 of buffer at first key-press (instead they move to top/bottom of buffer)
2563 when `scroll-error-top-bottom' is non-nil.
2565 *** New option `scroll-error-top-bottom' (see above).
2567 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2568 scroll a line instead of full screen.
2570 *** New property `scroll-command' should be set on a command's symbol to
2571 define it as a scroll command affected by `scroll-preserve-screen-position'.
2573 *** If you customize `scroll-conservatively' to a value greater than 100,
2574 Emacs will never recenter point in the window when it scrolls due to
2575 cursor motion commands or commands that move point (e.f., `M-g M-g').
2576 Previously, you needed to use `most-positive-fixnum' as the value of
2577 `scroll-conservatively' to achieve the same effect.
2579 *** "Aggressive" scrolling now honors the scroll margins.
2580 If you customize `scroll-up-aggressively' or
2581 `scroll-down-aggressively' and move point off the window, Emacs now
2582 scrolls the window so as to avoid positioning point inside the scroll
2585 ** Basic SELinux support has been added.
2586 This requires Emacs to be linked with libselinux at build time.
2588 *** Emacs preserves the SELinux file context when backing up.
2589 Also, the function `copy-file' has an extra optional argument for
2590 preserving SELinux context, and the return value of `backup-buffer'
2591 now includes the SELinux context.
2593 *** New functions `file-selinux-context' and `set-file-selinux-context'
2594 get and set the SELinux context of a file.
2598 *** `delete-by-moving-to-trash' now only affects commands that specify
2599 trashing. This avoids inadvertently trashing temporary files.
2601 *** Calling `delete-file' or `delete-directory' with a prefix argument
2602 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2604 ** File- and directory-local variable changes
2606 *** You can stop directory local vars from applying to subdirectories.
2607 Add an element (subdirs . nil) to the alist portion of any variables
2608 settings to indicate that the section should not apply to
2611 *** Directory local variables can apply to some file-less buffers.
2612 Affected modes include dired, vc-dir, and log-edit. For example,
2613 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2614 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2615 `hack-dir-local-variables-non-file-buffer' to support this.
2617 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2618 Instead, use "eval: (minor-mode 1)".
2620 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2621 to `inhibit-local-variables-regexps'. As the name suggests, it now
2622 applies to ALL file local variables, not just -*- lines. The
2623 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2628 *** The `quit-window' command now restores the last buffer displayed
2629 in the quitted window.
2631 *** Resizing an Emacs frame now preserves proportional window sizes,
2632 modulo restrictions like window minimum sizes and fixed-size windows.
2634 *** The behavior of `display-buffer' is now customizable in detail.
2636 **** New option `display-buffer-base-action' specifies a list of
2637 user-determined display "actions" (functions and optional arguments
2638 for choosing the displaying window).
2640 This takes precedence over the default display action, which is
2641 specified by `display-buffer-fallback-action'.
2643 **** New option `display-buffer-alist' maps buffer name regexps to
2644 display actions, taking precedence over `display-buffer-base-action'.
2646 *** New option `window-combination-limit'.
2647 The new option `window-combination-limit' allows to return the space
2648 obtained for resizing or creating a window more reliably to the window
2649 from which such space was obtained.
2651 *** New option `window-combination-resize'.
2652 The new option `window-combination-resize' allows to split a window that
2653 otherwise cannot be split because it's too small by stealing space from
2654 other windows in the same combination. Subsequent resizing or deletion
2655 of the window will resize all windows in the same combination as well.
2657 *** New option `frame-auto-hide-function' lets you choose between
2658 iconifying or deleting a frame when burying a buffer in a dedicated
2659 frame, or quitting a window showing a buffer in a frame of its own.
2661 *** New commands `maximize-window' and `minimize-window'.
2662 These maximize and minimize the size of a window within its frame.
2664 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2665 These functions allow to navigate through the live buffers that have
2666 been shown in a specific window.
2668 ** Minibuffer changes
2670 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2671 This is handy for minibuffer-only frames, and is also used for the feature
2672 where mouse-1 pops up *Messages*"', which can now easily be changed.
2674 *** Minibuffers set `truncate-lines' to nil.
2675 If you want to change the value to something else, you could use
2676 for example `minibuffer-setup-hook'.
2678 ** `auto-mode-case-fold' is now enabled by default.
2680 ** `backup-by-copying-when-mismatch' now defaults to t.
2682 ** New basic faces `error', `warning', `success'.
2683 These are used to highlight text indicating failure, caution or
2684 successful operation.
2686 ** New option `list-colors-sort' defines the color sort order
2687 for `list-colors-display'.
2689 ** The variable `focus-follows-mouse' now always defaults to nil.
2692 * Editing Changes in Emacs 24.1
2696 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2697 `isearch-yank-line'.
2699 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2700 `isearch-yank-kill'.
2702 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2704 ** New commands `count-words-region' and `count-words'.
2706 *** M-= is bound to `count-words-region', not `count-lines-region'.
2707 The `count-words-region' command, when called interactively, reports
2708 the number of lines, words, and characters in the region. It is a
2709 superset of the old `count-lines-region', which is now an obsolete
2712 ** The command `just-one-space' (M-SPC), if given a negative argument,
2713 also deletes newlines around point.
2717 *** New option `delete-active-region'.
2718 If non-nil, [delete] and DEL delete the region if it is active and no
2719 prefix argument is given. If set to `kill', those commands kill
2722 *** New command `delete-forward-char', bound to [delete].
2723 This is meant for interactive use, and obeys `delete-active-region'.
2724 The command `delete-char' does not obey `delete-active-region'.
2726 *** `delete-backward-char' is now a Lisp function.
2727 Apart from obeying `delete-active-region', its behavior is unchanged.
2728 However, the byte compiler now warns if it is called from Lisp; Lisp
2729 callers should use delete-char with a negative argument instead.
2731 *** The option `mouse-region-delete-keys' has been deleted.
2733 ** Selection changes.
2735 The default handling of clipboard and primary selections has been
2736 changed to conform with modern X applications. In short, most
2737 commands for killing and yanking text now use the clipboard, while
2738 mouse commands use the primary selection.
2740 In the following, we provide a list of these changes, followed by a
2741 list of steps to get the old behavior back if you prefer that.
2743 *** `select-active-regions' now defaults to t.
2744 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2745 the kill ring. The selected text is put in the primary selection, if
2746 the system possesses a separate primary selection facility (e.g. X).
2748 **** `select-active-regions' also accepts a new value, `only'.
2749 This means to only set the primary selection for temporarily active
2750 regions (usually made by mouse-dragging or shift-selection);
2751 "ordinary" active regions, such as those made with C-SPC followed by
2752 point motion, do not alter the primary selection.
2754 **** `mouse-drag-copy-region' now defaults to nil.
2756 *** mouse-2 is now bound to `mouse-yank-primary'.
2757 This pastes from the primary selection, ignoring the kill-ring.
2758 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2760 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2762 *** `x-select-enable-primary' now defaults to nil.
2763 Thus, commands that kill text or copy it to the kill-ring (such as
2764 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2766 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2767 exactly equivalent to M-w, C-w, and C-y respectively.
2769 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2770 non-nil by default, as Windows does not support the primary selection
2771 between applications.
2773 *** To return to the previous behavior, do the following:
2775 **** Change `select-active-regions' to nil.
2776 **** Change `mouse-drag-copy-region' to t.
2777 **** Change `x-select-enable-primary' to t (on X only).
2778 **** Change `x-select-enable-clipboard' to nil.
2779 **** Bind `mouse-yank-at-click' to mouse-2.
2781 *** Support for X cut buffers has been removed.
2783 *** X clipboard managers are now supported.
2784 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2786 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2787 in the current rectangle. With a prefix argument, this prompts for a
2788 number to count from and for a format string.
2790 ** `redisplay-dont-pause' now defaults to t.
2791 This makes Emacs feel more responsive to editing commands that arrive
2792 at high rate, e.g. if you lean on some key, because stopping redisplay
2793 in the middle (when this variable is nil) forces more expensive
2794 updates later on, and Emacs appears to be unable to keep up.
2796 ** The behavior of <TAB> for active regions in Text mode has changed.
2797 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2798 when the region is active causes Emacs to indent all the lines in the
2799 region, aligning them with the line previous to the first line in the
2800 region (or with the left margin if there is no previous line).
2802 ** When `occur' is called with a prefix argument, matching strings are
2803 collected into the `*Occur*' buffer without line numbers. If there
2804 are parenthesized subexpressions in the specified regexp, `occur'
2805 reads replacement text that may contain \\& and \\N whose convention
2806 follows `replace-match'.
2809 * Changes in Specialized Modes and Packages in Emacs 24.1
2811 ** Archive Mode has basic support for browsing and updating 7z archives.
2815 *** BibTeX mode now supports biblatex.
2816 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2817 `bibtex-entry-field-alist' is now an obsolete alias for
2818 `bibtex-BibTeX-entry-alist'.
2820 *** New command `bibtex-search-entries', bound to C-c C-a.
2822 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2824 *** New variable `bibtex-search-entry-globally'.
2828 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2830 *** The default browser used by the package is now the "xdg-open" program,
2831 on platforms that support it. This calls your desktop's preferred browser.
2835 *** Support for musical notes.
2837 *** Support for logarithmic units.
2839 *** No longer uses the tex prefix for TeX specific unit names when
2840 using TeX or LaTeX mode.
2842 *** New option to highlight selections using faces.
2844 *** `calc-histogram' has the option of using a vector to determine the bins.
2846 *** New "O" option prefix.
2848 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2850 ** Calendar, Diary, and Appt
2852 *** Diary entries can contain non-printing "comments".
2853 See the variable `diary-comment-start'.
2855 *** Appointments can specify their individual warning times.
2856 See the variable `appt-warning-time-regexp'.
2858 *** The function specified by `appt-disp-window-function' may be passed
2859 lists of arguments if multiple appointments are due at similar times.
2860 If you are using a custom function for this, you should update it.
2862 *** New function `diary-hebrew-birthday'.
2864 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2865 may no longer be nil, but must all be strings.
2867 *** The obsolete (since Emacs 22.1) method of enabling the appt
2868 package by adding `appt-make-list' to `diary-hook' has been removed.
2869 Use `appt-activate' instead.
2871 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2872 appt-issue-message (use the function appt-activate)
2873 appt-visible/appt-msg-window (use the variable appt-display-format)
2875 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2876 view-diary-entries, list-diary-entries, show-all-diary-entries
2880 *** New feature to "guess" the style in an existing buffer.
2881 The main entry point is M-x c-guess.
2883 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2885 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2886 Thus C-M-a will, by default, go to the beginning of the immediate function,
2889 *** "Macros with semicolons" can be registered for correct indentation.
2890 Where such a macro ends a line (no semicolon) the next statement is no longer
2891 parsed as a statement continuation.
2893 ** Comint and modes derived from it use the standard completion code.
2897 *** Compilation mode can be used without Font Lock mode.
2898 `compilation-parse-errors-function' is now obsolete.
2900 *** New variable `compilation-filter-start', which is bound while
2901 `compilation-filter-hook' runs. It records the start position of the
2902 text inserted by `compilation-filter'.
2904 *** `compilation-error-screen-columns' and `compilation-first-column'
2905 are obeyed in the editing buffer. So programming language modes can
2906 set them, whereas previously only the value in the *Compilation*
2911 *** Customize buffers now contain a search field.
2912 The search is performed using `customize-apropos'.
2913 To turn off the search field, set `custom-search-field' to nil.
2915 *** Options in customize group buffers start out hidden if not customized.
2916 Use the arrow to the left of the option name to toggle visibility.
2918 *** custom-buffer-sort-alphabetically now defaults to t.
2920 *** The color widget now has a "Choose" button, which allows you to
2921 choose a color via `list-colors-display'.
2925 *** It is now possible to access buses other than the default system
2928 *** The `dbus-register-method' and `dbus-register-property' functions
2929 optionally do not register names.
2931 *** The new function `dbus-register-service' registers a known service
2932 name on a D-Bus without also registering a property or a method.
2936 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2937 if called with a prefix argument, read a file name from the minibuffer
2938 instead of using the current buffer.
2940 *** The "dired local variables" feature of Dired-x is obsolete.
2941 The standard directory local variables feature replaces it.
2945 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2946 controlling attempts to autojoin a channel.
2948 *** New variable `erc-coding-system-precedence': If we use `undecided'
2949 as the server coding system, this variable will then be consulted.
2950 The default is to decode strings that can be decoded as utf-8 as
2951 utf-8, and do the normal `undecided' decoding for the rest.
2955 *** The default value of `eshell-directory-name' has changed
2956 to be an "eshell" directory in `user-emacs-directory'.
2957 The old "~/.eshell/" directory is still used if it exists, though.
2961 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2962 It now supports multithread non-stop debugging and simultaneous
2963 debugging of several threads.
2967 *** RET (`image-toggle-animation') toggles animation, if applicable.
2968 Animation plays once, unless the option `image-animate-loop' is non-nil.
2972 *** New command M-x info-display-manual displays a named Info manual.
2973 If that manual is already visited in some Info buffer, it displays
2974 that buffer. (This is handy if you have many manuals in many *info*
2975 buffers, and don't remember the name of the buffer visiting the manual
2976 you want to consult.) Otherwise, it loads and displays the manual.
2978 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2979 This is for compatibility with the stand-alone Info reader program,
2980 and also because `Info-edit' is a rarely used command that is disabled
2983 ** Mail mode changes (not Message mode)
2985 *** New command M-x mail-add-attachment for adding MIME attachments
2987 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2988 (Its name is misleading, since it has nothing to do with MIME
2989 attachments.) The old name is now an obsolete alias to the new name.
2991 ** MH-E has been updated to MH-E version 8.3.1.
2992 See MH-E-NEWS for details.
2994 ** Modula-2 mode provides auto-indentation.
2996 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2998 ** nXML mode no longer binds C-RET to `nxml-complete'.
2999 Completion is now performed via `completion-at-point', bound to C-M-i
3000 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3001 default), this performs tag completion.
3003 ** Org mode has been updated to version 7.8.09.
3004 See ORG-NEWS for details.
3006 ** Prolog mode has been completely revamped, with lots of additional
3007 functionality such as more intelligent indentation, electricity,
3008 support for more variants, including Mercury, and a lot more.
3012 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3013 in the Rmail incoming message.
3015 *** The variable `rmail-message-filter' no longer has any effect.
3016 This change was made in Emacs 23.1 but was not advertised at the time.
3017 Try using `rmail-show-message-hook' instead.
3021 *** M-x shell prompts for the shell path name if the default directory
3022 is a remote file name and neither the environment variable $ESHELL nor
3023 the variable `explicit-shell-file-name' is set.
3025 *** TAB is now bound to the standard `completion-at-point' command,
3026 which now implements the pcomplete rules for shell command completion.
3030 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3031 if the mail server supports them. This uses either built-in GnuTLS
3032 support, or the starttls.el library. Customize `smtpmail-stream-type'
3035 *** The variable `smtpmail-auth-credentials' has been removed.
3036 By default, the information is now stored in the file ~/.authinfo.
3037 This was the default value of smtpmail-auth-credentials. If you had
3038 customized smtpmail-auth-credentials to a list of user names and
3039 passwords, those settings are not used. During your first connection
3040 to the smtp server, Emacs will prompt for the user name and password,
3041 and offer to save them to ~/.authinfo. Or you can manually copy the
3042 credentials to ~/.authinfo. For example, if you had
3044 (setq smtpmail-auth-credentials
3045 '(("mail.example.org" 25 "jim" "s!cret")))
3047 then the equivalent line in ~/.authinfo would be
3049 machine mail.example.org port 25 login jim password s!cret
3051 See the auth-source manual for more information, e.g. on encrypting
3052 the credentials file.
3054 *** The variable `smtpmail-starttls-credentials' has been removed.
3055 If you had that set, you need to put
3057 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3059 in your ~/.authinfo file instead.
3061 *** SMTPmail defaults to using the address in the From: header as the
3062 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3063 to the address you wish to use instead.
3067 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3068 and `sql-oracle-scan-on'.
3070 *** New options controlling prompting for login parameters.
3071 Each supported product has a custom variable `sql-*-login-params',
3072 which is a list of the parameters to be prompted for before a
3073 connection is established.
3075 *** The command `sql-product-interactive' now takes a prefix argument,
3076 which causes it to prompt for an SQL product.
3078 *** Product-specific SQL interactive commands now take prefix arguments.
3079 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3080 given a prefix argument, prompt for a name for the SQL interactive
3081 buffer. This reduces the need for calling `sql-rename-buffer'.
3083 *** SQL interactive modes suppress command continuation prompts, and
3084 replace tabs with spaces. The first change impacts multiple line SQL
3085 statements entered with C-j between each line, statements yanked into
3086 the buffer and statements sent with `sql-send-*' functions. The
3087 second prevents the MySQL and Postgres interpreters from listing
3088 object name completions when sent text via `sql-send-*' functions.
3090 *** New command `sql-connect' starts a predefined SQLi session,
3091 using the login parameters from `sql-connection-alist'.
3093 *** New "Save Connection" menu item in SQLi buffers.
3094 This gathers the login params specified for the SQLi session, if it
3095 was not started by a connection, and saves them as a new connection.
3097 *** New commands for listing database objects and details:
3098 sql-list-all and sql-list-table.
3100 *** An API for manipulating SQL product definitions has been added.
3104 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3108 *** New inline access method "ksu" (kerberized su).
3110 *** The following access methods are discontinued: "ssh1_old",
3111 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3113 *** The user option `remote-file-name-inhibit-cache' controls whether
3114 remote file attributes are cached for better performance.
3116 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3117 default value to "".
3119 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3120 for remote machines which support SELinux.
3122 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3123 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3124 the degree of parallelism.
3126 ** VC and related modes
3128 *** Support for pulling on distributed version control systems.
3129 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3130 supported (currently with Bzr, Git, and Mercurial), to update the
3131 current branch and working tree. A prefix argument means to prompt
3132 the user for specifics, e.g. a pull location.
3134 *** `vc-update' is now an alias for `vc-pull'.
3136 *** Support for merging on distributed version control systems.
3137 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3138 is supported (currently with Bzr, Git, and Mercurial), to merge
3139 changes from another branch into the current one. It prompts for
3140 specifics, e.g. a merge source.
3142 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3143 shows a diff while querying the user. It defaults to t.
3145 *** Log entries in some Log View buffers can be toggled to display a
3146 longer description by typing RET (log-view-toggle-entry-display).
3147 This is currently supported for Bzr, Git, and Mercurial (to support
3148 another backend, define a `log-view-expanded-log-entry-function').
3149 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3150 use this to display the full log entry for the revision at point.
3152 *** New command `vc-ediff' allows visual comparison of two revisions
3153 of a file similar to `vc-diff', but using ediff backend.
3155 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3156 this was not advertised at the time.
3158 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3159 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3160 this was not advertised at the time.
3166 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3168 *** partial-completion-mode (complete.el) is obsolete.
3169 You can get a comparable behavior with:
3170 (setq completion-styles '(partial-completion initials))
3171 (setq completion-pcm-complete-word-inserts-delimiters t)
3173 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3175 *** pgg is obsolete (use EasyPG instead).
3177 *** sregex.el is obsolete, since rx.el is a strict superset.
3179 *** s-region.el and pc-select.el are obsolete.
3180 They are superseded by shift-select-mode, enabled by default since 23.1.
3182 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3186 *** The Landmark game is now invoked with `landmark', not `lm'.
3187 Its functions and variables have been similarly renamed.
3189 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3190 (This interfered with cua-mode.)
3192 *** f90.el has some support for Fortran 2008 syntax.
3194 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3196 *** New command `nato-region' converts text to NATO phonetic alphabet.
3199 * New Modes and Packages in Emacs 24.1
3201 ** Occur Edit mode applies edits made in *Occur* buffers to the
3202 original buffers. It is bound to "e" in Occur mode.
3204 ** New global minor mode electric-pair-mode.
3205 When enabled, typing an open parenthesis automatically inserts the
3206 matching closing one.
3208 ** New global minor mode electric-indent-mode.
3209 When enabled, typing certain characters triggers reindentation.
3210 Major modes wishing to use this can set electric-indent-chars or
3211 electric-indent-functions.
3213 ** New global minor mode electric-layout-mode.
3214 When enabled, typing certain characters automatically inserts newlines.
3215 Major modes wishing to use this can set electric-layout-rules.
3217 ** tabulated-list.el provides a generic major mode for tabulated data,
3218 from which other modes can be derived.
3220 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3222 ** secrets.el is an implementation of the Secret Service API, an
3223 interface to password managers like GNOME Keyring or KDE Wallet. The
3224 Secret Service API requires D-Bus for communication. The command
3225 `secrets-show-secrets' offers a buffer with a visualization of the
3228 ** notifications.el provides an implementation of the Desktop
3229 Notifications API. It requires D-Bus for communication.
3231 ** soap-client.el supports access to SOAP web services from Emacs.
3232 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3234 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3236 ** New emacs-lock.el package.
3237 The previous version has been moved to obsolete/old-emacs-lock.el.
3238 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3239 against exiting Emacs and killing the buffer can be set separately.
3240 The mechanism for automatically turning off protection for buffers
3241 with dead inferior processes has been generalized.
3244 * Incompatible Lisp Changes in Emacs 24.1
3246 ** Passing a nil argument to a minor mode function call now ENABLES
3247 the minor mode unconditionally. This is so that you can write e.g.
3249 (add-hook 'text-mode-hook 'foo-mode)
3251 to enable foo-mode in Text mode buffers, removing the need for
3252 `turn-on-foo-mode' style functions. This affects all mode commands
3253 defined by `define-minor-mode'. If called interactively, the mode
3254 command still toggles the minor mode.
3256 ** The return value of `backup-buffer' has changed.
3257 It is now a list of three elements, where the second element is a list
3258 describing the original file's SELinux context. If Emacs or the
3259 system lacks SELinux support, the context list is (nil nil nil nil).
3260 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3262 ** `char-direction-table' and the `char-direction' function were deleted.
3263 They were buggy and inferior to the new support of bidirectional
3264 editing introduced in Emacs 24. If you need the bidirectional
3265 properties of a character, use `get-char-code-property' with the last
3266 argument `bidi-class'.
3268 ** `copy-directory' now copies the source directory as a subdirectory
3269 of the target directory, if the latter is an existing directory. The
3270 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3271 the contents directly into a pre-existing target directory.
3273 ** For mouse click input events in the text area, the Y pixel
3274 coordinate in the POSITION list now counts from the top of the text
3275 area, excluding any header line. Previously, it counted from the top
3278 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3279 been further reduced. Now a backquote not followed by a space is
3280 always treated as a "new-style" backquote. Please remove all
3281 "old-style" backquotes from your code. If your code uses backquotes
3282 as documented in the Elisp manual, and compiles without warning, then
3283 you have nothing to do in this regard. Code not following the
3284 appropriate conventions may fail to compile.
3286 The most common cause of trouble seems to be an old-style backquote
3287 followed by a newline. Another cause of trouble is vector notation
3288 for key sequence notation: instead of [(control ,)] and [(control ')],
3289 you should write [(control ?,)] and [(control ?')], which will work in
3292 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3293 was not advertised at the time. The function `custom-initialize-delay'
3294 replaced all known uses.
3296 ** `view-buffer' now treats special mode-class in the same way that
3297 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3298 major mode is special).
3300 ** Menu and tool bar changes
3302 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3303 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3304 With these alist entries omitted, `make-frame' checks the value of the
3305 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3306 a menu-bar or tool-bar, respectively. If the alist entries are added,
3307 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3309 *** The menu bar bindings's caches are not used any more.
3310 Use (where-is-internal <def> nil t) instead.
3312 ** Regions created by mouse dragging are now normal active regions,
3313 similar to those created by shift-selection (see Selection changes
3314 above). In previous Emacs versions, these regions were delineated by
3315 `mouse-drag-overlay'; that variable has been removed.
3317 ** The fourth argument of `filter-buffer-substring' has been removed.
3318 If you want to remove text properties from the final result, simply
3319 pass the result through substring-no-properties.
3321 ** cl.el no longer provides `cl-19'.
3323 ** The following obsolete functions and aliases have been removed
3324 (the appropriate new function is given in parentheses; "not needed"
3325 means you can just remove all calls to the function in question):
3327 *** `comint-kill-output' (`comint-delete-output')
3328 *** `decompose-composite-char' (`char-to-string')
3329 *** `outline-visible' (`outline-invisible-p')
3330 *** `internal-find-face' (`facep')
3331 *** `internal-get-face' (`facep and check-face')
3332 *** `frame-update-faces' (not needed)
3333 *** `frame-update-face-colors' (`frame-set-background-mode')
3334 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3335 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3336 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3337 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3338 *** `x-make-font-unbold' (`make-face-unbold')
3339 *** `x-make-font-unitalic' (`make-face-unitalic')
3340 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3341 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3342 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3343 *** `char-bytes' (== 1)
3344 *** `isearch-return-char' (`isearch-printing-char')
3345 *** `make-local-hook' (not needed)
3346 *** `set-screen-height' (`set-frame-height')
3347 *** `set-screen-width' (`set-frame-width')
3349 ** The following obsolete variables and varaliases have been removed
3350 (the appropriate new variable is given in parentheses):
3352 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3353 *** `vc-header-alist' (`vc-BACKEND-header')
3354 *** `directory-sep-char' (== ?/)
3355 *** `font-lock-defaults-alist' (`font-lock-defaults')
3356 *** `e' (`float-e').
3358 ** The following obsolete files were removed:
3359 sc.el, x-menu.el, rnews.el, rnewspost.el
3361 ** The format of the finder-inf.el file has changed, since the Finder
3362 mechanism is now based on the package system. The variable
3363 `finder-package-info' is replaced by `package--builtins' and
3364 `finder-keywords-hash'.
3366 ** When generating autoloads, `update-directory-autoloads' no longer
3367 assumes every inspected file is in your `load-path'. It instead
3368 generates relative names according to the current `load-path'.
3371 * Lisp Changes in Emacs 24.1
3373 ** Code can now use lexical scoping by default instead of dynamic scoping.
3374 The `lexical-binding' variable enables lexical scoping for local
3375 variables. It is typically set via a file-local variable in the first
3376 line of the file, in which case it applies to all the code in that
3379 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3380 binding instead of the old dynamic binding mode.
3382 *** Lexically scoped interpreted functions are represented with a new form
3383 of function value which looks like (closure ENV ARGS &rest BODY).
3385 *** New macro `letrec' to define recursive local functions.
3387 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3388 So do `defcustom' and other forms that call `defvar' as a subroutine.
3390 *** New function `special-variable-p' to check whether a variable is
3391 declared as dynamically bound.
3393 *** The form ((lambda ...) ...) is deprecated.
3395 ** An Emacs Lisp testing tool is now included.
3396 Emacs Lisp developers can use this tool to write automated tests for
3397 their code. See the ERT info manual for details.
3399 ** Changes for bidirectional display and editing
3401 *** New function `current-bidi-paragraph-direction'.
3402 This returns the base direction of the paragraph at point.
3404 *** New function `bidi-string-mark-left-to-right'.
3405 Given a string containing characters from right-to-left scripts, this
3406 function returns another string which can be safely inserted into a
3407 buffer, such that any following text will be always displayed to the
3408 right of that string. (This works by appending an invisible Unicode
3409 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3411 This is useful when the buffer has overall left-to-right paragraph
3412 direction and you need to insert a string whose contents are not known
3413 in advance, without disrupting the layout of the line.
3417 *** Window tree functions are accessible in Elisp.
3418 Functions are provided to return the parent, siblings or child windows
3419 of any window including internal windows (windows not associated with a
3420 buffer) in the window tree.
3422 **** New function `window-valid-p' gives non-nil for live and internal
3425 **** Window manipulation can deal with internal windows.
3426 Many window handling functions like `split-window', `delete-window', or
3427 `delete-other-windows' as well as the window resizing functions can now
3428 act on any window including internal ones.
3430 *** window-total-height/-width vs window-body-height/-width.
3431 The function `window-height' has been renamed to `window-total-height'
3432 and `window-width' has been renamed to `window-body-width'. The old
3433 names are provided as aliases. Two new functions `window-total-width'
3434 and `window-body-height' are provided.
3436 *** Window parameters specific to window handling functions.
3437 For each window you can specify a parameter to override the default
3438 behavior of a number of functions like `split-window', `delete-window'
3439 and `delete-other-windows'. The variable `ignore-window-parameters'
3440 allows to ignore processing such parameters.
3442 *** New semantics of third argument of `split-window'.
3443 The third argument of `split-window' has been renamed to SIDE and can be
3444 set to any of the values 'below, 'right, 'above, or 'left to make the
3445 new window appear on the corresponding side of the window that shall be
3446 split. Any other value of SIDE will cause `split-window' to split the
3447 window into two side-by-side windows as before.
3449 *** Window resizing functions.
3450 A new standard function for resizing windows called `window-resize' has
3451 been introduced. This and all other functions for resizing windows no
3452 longer delete any windows when they become too small.
3454 *** Deleting the selected window now selects the most recently selected
3455 live window on that frame instead.
3457 *** `adjust-window-trailing-edge' adjustments.
3458 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3459 is able to resize other windows if a window adjacent to the trailing
3460 edge cannot be shrunk any more. This makes its behavior more similar to
3461 that of Emacs 21 without compromising, however, its inability to delete
3462 windows which was introduced in Emacs 22.
3464 *** Window-local buffer lists.
3465 Windows now have local buffer lists. This means that removing a buffer
3466 from display in a window will preferably show the buffer previously
3467 shown in that window with its previous window-start and window-point
3468 positions. This also means that the same buffer may be automatically
3469 shown twice even if it already appears in another window.
3471 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3472 which if non-nil requires the buffer to be displayed in the currently
3473 selected window, signaling an error otherwise. If nil, another window
3474 can be used, e.g. if the selected one is strongly dedicated.
3476 *** `split-window-vertically' and `split-window-horizontally' renamed
3477 to `split-window-below' and `split-window-right' respectively.
3478 The old names are kept as aliases.
3482 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3483 named ACTION, and takes a display action of the same form as
3484 `display-buffer-base-action' (see Changes, above). A non-nil,
3485 non-list value is treated specially, as the old meaning.
3487 **** New variable `display-buffer-overriding-action'.
3489 **** The procedure of `display-buffer' etc. to choose a window is
3490 determined by combining `display-buffer-overriding-action',
3491 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3492 and `display-buffer-fallback-action'. The second and fourth of these
3493 are user-customizable variables.
3495 See the docstring of `display-buffer' for details.
3497 *** New functions `window-state-get' and `window-state-put'.
3498 These functions allow to save and restore the state of an arbitrary
3499 frame or window as an Elisp object.
3503 *** New variable `completion-extra-properties' used to specify extra
3504 properties of the current completion:
3505 - :annotate-function, same as the old completion-annotate-function.
3506 - :exit-function, function to call after completion took place.
3508 *** Functions on `completion-at-point-functions' can return any of the
3509 properties valid for `completion-extra-properties'.
3511 *** `completion-annotate-function' is obsolete.
3513 *** New `metadata' method for completion tables. The metadata thus returned
3514 can specify various details of the data returned by `all-completions':
3515 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3516 used to select a style in completion-category-overrides.
3517 - `annotation-function' to add annotations in *Completions*.
3518 - `display-sort-function' to specify how to sort entries in *Completions*.
3519 - `cycle-sort-function' to specify how to sort entries when cycling.
3521 *** `minibuffer-local-filename-must-match-map' is not used any more.
3522 Instead, the bindings in `minibuffer-local-filename-completion-map'
3523 are combined with `minibuffer-local-must-match-map'.
3525 *** New variable `completing-read-function' allows overriding the
3526 behavior of `completing-read'.
3528 ** `glyphless-char-display' can now distinguish between graphical and
3529 text terminal display, via a char-table entry that is a cons cell.
3531 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3532 Instead, the offending function is removed.
3536 *** New function `run-hook-wrapped' for running an abnormal hook by
3537 passing the hook functions as arguments to a "wrapping" function.
3538 Like `run-hook-with-args-until-success', it stops at the first
3539 non-nil return value.
3541 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3542 set of "wrapping" filters, similar to around advice.
3543 (A version of this macro was actually added in Emacs 23.2 but was not
3544 advertised at the time.)
3548 *** New macro `condition-case-unless-debug' (this was actually added in
3549 Emacs 23.1 as condition-case-no-debug, but not advertised)
3551 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3553 *** Variable `stack-trace-on-error' removed.
3555 *** The debugger can now "continue" from an error, which means it will
3556 jump to the error handler as if the debugger had not been invoked
3557 instead of jumping all the way to the top-level.
3559 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3560 This can be useful when `inhibit-quit' is set.
3562 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3563 named Emacs server instances.
3565 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3566 to redirect STDOUT to a file.
3568 ** The function `format-time-string' now supports the %N directive,
3569 for higher-resolution time stamps.
3571 ** New input reading functions
3573 *** New function `read-char-choice' reads a restricted set of
3574 characters, discarding any inputs not inside the set.
3576 *** The command `read-color' now requires a match for a color name
3577 or RGB triplet, instead of signaling an error if the user provides
3580 **** `facemenu-read-color' is now an alias for `read-color'.
3582 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3583 The variable is now used to load all kind of supported dynamic libraries,
3584 not just image libraries. The previous name is still available as an
3587 ** Syntax parsing changes
3589 *** New variable `syntax-propertize-function'.
3590 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3591 This allows syntax-table properties to be set independently from font-lock:
3592 just call syntax-propertize to make sure the text is propertized.
3593 Together with this new variable come a new hook
3594 syntax-propertize-extend-region-functions, as well as two helper functions:
3595 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3596 as-is; and syntax-propertize-rules which provides a new way to specify
3599 *** Syntax tables support a new "comment style c" additionally to style b.
3601 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3603 ** frame-local variables cannot be let-bound any more.
3605 ** Major and minor mode changes
3607 *** `set-auto-mode' now respects mode: local variables at the end of files,
3608 as well as those in the -*- line.
3610 *** `prog-mode' is a new major mode from which programming modes
3613 **** `prog-mode-hook' can be used to enable features for programming
3614 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3615 on-the-fly spell checking for comments and strings.
3617 *** New hook `change-major-mode-after-body-hook', run by
3618 `run-mode-hooks' just before any other mode hooks.
3620 *** Enabled globalized minor modes can be disabled in specific major modes.
3621 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3622 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3624 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3626 ** File-handling changes
3628 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3629 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3630 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3631 argument is supplied (see Trash changes, above).
3633 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3635 ** Tool-bars can display separators.
3636 Tool-bar separators are handled like menu separators in menu-bar maps,
3637 i.e. via menu entries of the form `(menu-item "--")'.
3641 *** Animated images support (currently animated gifs only).
3643 **** `image-animated-p' returns non-nil if an image can be animated.
3645 **** `image-animate' animates a supplied image spec.
3647 **** `image-animate-timer' returns the timer object for an image that
3650 *** `image-extension-data' has been renamed to `image-metadata'.
3651 The old name is an obsolete alias to the new one.
3653 *** Image mode can view any image type that ImageMagick supports.
3654 This requires Emacs to be built with ImageMagick support.
3656 **** New function `imagemagick-types', defined if ImageMagick support
3657 is enabled, returns a list of image file extensions that your
3658 ImageMagick installation supports.
3660 **** New function `imagemagick-register-types' enables ImageMagick
3661 image types in Image mode and in `create-image' and other helper
3664 **** New option `imagemagick-types-inhibit' excludes certain
3665 ImageMagick image types from `imagemagick-register-types'.
3667 **** With ImageMagick support, there are extra Image mode commands to
3668 resize and rotate images: `image-transform-fit-to-height',
3669 `image-transform-fit-to-width', `image-transform-set-rotation', and
3670 `image-transform-set-scale'.
3672 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3673 passes it to the mail user agent function. This argument specifies an
3674 action for returning to the caller after finishing with the mail. For
3675 example, this is used by Rmail to optionally delete a mail window.
3677 ** XML and HTML parsing
3678 If Emacs is compiled with libxml2 support, there are two new
3679 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3680 and `libxml-parse-xml-region' (which parses XML). Both return an
3681 Emacs Lisp parse tree.
3683 ** Networking and encryption changes
3685 *** `open-network-stream' can now be used to open an encrypted stream.
3686 It now accepts an optional `:type' parameter for initiating a TLS
3687 connection, directly or via STARTTLS. To do STARTTLS, additional
3688 parameters (`:end-of-command', `:success', `:capabilities-command')
3689 must also be supplied.
3691 *** New library gnutls.el.
3692 The new function `gnutls-available-p' returns non-nil if Emacs is
3693 built with GnuTLS support. The main entry points are
3694 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3695 these functions through `open-network-stream', because that can
3696 upgrade connections through STARTTLS opportunistically or use plain
3697 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3700 *** New primitive `secure-hash' that supports many secure hash algorithms:
3701 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3702 sha1.el has been removed. The `sha1' feature is provided by default.
3706 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3708 ** Progress reporters can now "spin".
3709 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3710 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3711 time you call `progress-reporter-update' on that progress reporter,
3712 with a nil or omitted VALUE argument, the reporter message is
3713 displayed with a "spinning bar".
3715 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3716 being reverted, even if the buffer has a local `revert-buffer-function'.
3718 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3719 If delayed-warnings-list is non-nil, the command loop calls
3720 `delayed-warnings-hook' after `post-command-hook'. At present, this
3721 is only used by Emacs on some platforms to display warnings during
3722 startup, which might otherwise not be noticed. This uses the
3723 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3725 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3727 ** New function `make-composed-keymap' that constructs a new keymap
3728 from multiple input maps. You can use this to make a keymap that
3729 inherits from multiple maps, eg:
3730 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3732 ** New function `string-prefix-p'.
3733 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3735 ** New reader macro ## that stands for the empty symbol.
3736 This means that the empty symbol can now be read back. Also, #: by itself
3737 (when not immediately followed by a possible symbol character) stands for
3738 an empty uninterned symbol.
3740 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3742 ** The following functions and variables are obsolete:
3744 *** `tooltip-use-echo-area' is obsolete.
3745 Rather than setting this to t, disable Tooltip mode instead.
3747 *** buffer-substring-filters is obsolete.
3748 Use `filter-buffer-substring-functions' instead.
3750 *** `byte-compile-disable-print-circle' is obsolete.
3752 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3753 Use `post-command-hook' instead.
3755 *** `font-lock-maximum-size' is obsolete.
3758 * Changes in Emacs 24.1 on Non-Free Operating Systems
3760 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3761 and also when HOME is set to C:\ by default.
3763 ** New configure.bat options
3765 *** --enable-checking builds Emacs with extra runtime checks.
3767 *** --distfiles specifies files to be included in binary distribution.
3769 *** --without-gnutls disables automatic GnuTLS detection.
3771 *** --lib for general library linkage, works with the USER_LIBS build variable.
3773 ** New make target `dist' to create binary distribution for MS Windows.
3775 ** The Lisp function `w32-default-color-map' is now obsolete.
3776 (It is only used internally in the Emacs C code.)
3778 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3779 reappear on mouse-over. (Requires OS X 10.6 or later.)
3781 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3782 other platforms, rather than inserting its contents into the buffer.
3785 ----------------------------------------------------------------------
3786 This file is part of GNU Emacs.
3788 GNU Emacs is free software: you can redistribute it and/or modify
3789 it under the terms of the GNU General Public License as published by
3790 the Free Software Foundation, either version 3 of the License, or
3791 (at your option) any later version.
3793 GNU Emacs is distributed in the hope that it will be useful,
3794 but WITHOUT ANY WARRANTY; without even the implied warranty of
3795 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3796 GNU General Public License for more details.
3798 You should have received a copy of the GNU General Public License
3799 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3804 paragraph-separate: "[
\f]*$"