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
246 *** `load-prefer-newer', affects how the `load' function chooses the
247 file to load. If this is non-nil, then when both .el and .elc
248 versions of a file exist, and the caller did not explicitly specify
249 which one to load, then the newer file is loaded. The default, nil,
250 means to always load the .elc file.
253 * Editing Changes in Emacs 24.4
255 ** Indentation changes
258 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
259 When invoked without a prefix argument, it now activates a transient
260 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
261 the text indentation in the region. Typing any other key resumes
262 normal editing behavior.
264 *** `electric-indent-mode' is enabled by default.
266 *** `tab-stop-list' is now implicitly extended to infinity by repeating
267 the last step. Its default value is changed to nil which means a tab
268 stop every `tab-width' columns.
272 *** New command `cycle-spacing' cycles between spacing conventions:
273 having just one space, no spaces, or reverting to the original
274 spacing. Like `just-one-space', it can handle or ignore newlines and
275 leave different number of spaces.
277 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
278 a 1-letter word, which is an error according to Polish and
279 Czech typography rules. To globally enable this feature, evaluate:
281 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
284 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
286 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
287 Most commands are still unaware of it, but kill/yank do work on the rectangle.
290 ** New option `visual-order-cursor-movement'.
291 If this is non-nil, cursor motion with arrow keys will follow the
292 visual order of characters on the screen: <left> always moves to the
293 left, <right> always moves to the right, disregarding the surrounding
294 bidirectional context.
298 *** All register commands can now show help with preview.
301 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
304 *** New command `C-x r f' (`frameset-to-register').
305 See Changes in Emacs 24.4, above.
307 ** New command `delete-duplicate-lines'.
308 When its arg ADJACENT is non-nil (when called interactively with C-u
309 C-u) it works like the utility `uniq'. Otherwise by default it
310 deletes duplicate lines everywhere in the region without regard to
311 adjacency. When its arg KEEP-BLANKS is non-nil (when called
312 interactively with C-u C-u C-u), duplicate blank lines are preserved.
315 * Changes in Specialized Modes and Packages in Emacs 24.4
317 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
319 ~/.emacs.d/timelog replaces ~/.timelog
320 ~/.emacs.d/vip replaces ~/.vip
321 ~/.emacs.d/viper replaces ~/.viper
322 ~/.emacs.d/ido.last replaces ~/.ido.last
323 ~/.emacs.d/kkcrc replaces ~/.kkcrc
324 ~/.emacs.d/quickurls replaces ~/.quickurls
325 ~/.emacs.d/idlwave replaces ~/.idlwave
326 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
327 ~/.emacs.d/places replaces ~/.emacs-places
328 ~/.emacs.d/shadows replaces ~/.shadows
329 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
330 ~/.emacs.d/strokes replaces ~/.strokes
331 ~/.emacs.d/notes replaces ~/.notes
332 ~/.emacs.d/type-break replaces ~/.type-break
333 Also the following files used by the now obsolete otodo-mode.el:
334 ~/.emacs.d/todo-do replaces ~/.todo-do
335 ~/.emacs.d/todo-done replaces ~/.todo-done
336 ~/.emacs.d/todo-top replaces ~/.todo-top
338 ** Backtrace and debugger
340 *** The Lisp debugger's `e' command now includes the lexical environment
341 when evaluating the code in the context at point. Hence, it now lets
342 you access lexical variables.
345 *** New command `v' (`debugger-toggle-locals') displays local vars.
347 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
348 code run via JIT Lock.
353 *** Battery information via the BSD `apm' utility is now supported.
357 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
359 ** Calendar and Diary
362 *** New faces `calendar-weekday-header', `calendar-weekend-header',
363 and `calendar-month-header'.
366 *** New option `calendar-day-header-array'.
369 *** New variable `diary-from-outlook-function', used by the command
370 `diary-from-outlook'.
373 *** The variable `calendar-font-lock-keywords' is obsolete.
377 *** Calc by default now uses the Gregorian calendar for all dates, and
378 uses January 1, 1 AD as its day number 1. Previously Calc used the
379 Julian calendar for dates before September 14, 1752, and it used
380 December 31, 1 BC as its day number 1; the new scheme is more
381 consistent with Calendar's calendrical system and day numbering.
383 *** The new variable `calc-gregorian-switch' lets you configure the
384 date when Calc switches from the Julian to the Gregorian calendar.
385 Nil, the default value, means to always use the Gregorian calendar.
386 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
389 *** Support for ISO 8601 dates.
395 **** The cpp-root project now supports executing a compile command.
396 It can be set through the new :compile-command slot or the
397 buffer-local variable `compile-command'.
399 **** Better selection of include directories for the 'linux' project.
400 Include directories now support out-of-tree build directories and
401 target architecture auto-detection.
405 **** Improved detection of used namespaces in current scope in C++.
407 **** Parsing of default values for variables and function arguments in C/C++.
408 They are also displayed by the summarize feature in the modeline.
410 **** Improved parsing of function pointers in C/C++.
411 This also includes parsing of function pointers as function arguments.
413 **** Parsing of C/C++ preprocessor macros which open new scope.
414 For example, this enables parsing of macros which open new namespaces.
416 **** Support for 'this' pointer in inline member functions in C++.
420 *** New macro `cl-tagbody'.
423 *** letf is now just an alias for cl-letf.
427 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
428 Hence, you can now enable it independently from `transient-mark-mode',
429 `delete-selection-mode', and `shift-select-mode'.
431 *** `cua-highlight-region-shift-only' is now obsolete.
432 You can disable `transient-mark-mode' to get the same result.
434 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
438 *** Support for completion, ElDoc, and Flycheck has been added.
440 *** The current CFEngine syntax is parsed from "cf-promises -s json".
441 There is a fallback syntax available if you don't have cf-promises or
442 if it doesn't support that option.
444 ** Delete Selection mode can now be used without `transient-mark-mode'.
448 *** `desktop-auto-save-timeout' defines the number of seconds idle time
449 before auto-save of the desktop.
451 *** `desktop-restore-frames', enabled by default, allows saving and
452 restoring the frame/window configuration (frameset). Additional options
453 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
454 and `desktop-restore-forces-onscreen' offer further customization.
458 *** New minor mode `dired-hide-details-mode' hides details.
460 ** Eldoc Mode works properly in the minibuffer.
462 ** Electric Pair mode
463 *** New `electric-pair-preserve-balance' enabled by default.
465 Pairing/skipping only kicks in when that help the balance of
466 parentheses and quotes, i.e. the buffer should end up at least as
469 You can further control this behavior by adjusting the predicates
470 stored in `electric-pair-inhibit-predicate' and
471 `electric-pair-skip-self'.
473 *** New `electric-pair-delete-adjacent-pairs' enabled by default.
475 In `electric-pair-mode', the commands `backward-delete-char' and
476 `backward-delete-char-untabify' are now bound to electric variants
477 that delete the closer when invoked between adjacent pairs.
479 *** New `electric-pair-open-newline-between-pairs' enabled by default.
481 In `electric-pair-mode', inserting a newline between adjacent pairs
482 opens an extra newline after point, which is indented if
483 `electric-indent-mode' is also set.
485 *** New `electric-pair-skip-whitespace' enabled by default.
487 Controls if skipping over closing delimiters should jump over any
488 whitespace slack. Setting it to `chomp' makes it delete this
489 whitespace. See also the variable
490 `electric-pair-skip-whitespace-chars'.
492 *** New variables control the pairing in strings and comments.
494 You can customize `electric-pair-text-pairs' and
495 `electric-pair-text-syntax-table' to tweak pairing behavior inside
496 strings and comments.
500 *** New option `epa-mail-aliases'.
502 You can set this to a list of alias expansions for keys to use
503 in `epa-mail-encrypt'.
505 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
506 that means: when one of the recipients of the message being encrypted
507 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
509 If one element of the variable's value is ("foo@bar.com"),
510 that means: when one of the recipients of the message being encrypted
511 is `foo@bar.com', ignore that name as regards encryption.
512 This is useful to avoid a query when you have no key for that name.
516 *** New option `erc-accidental-paste-threshold-seconds'.
517 If set to a number, this can be used to avoid accidentally paste large
518 amounts of data into the ERC input.
523 *** New macro `skip-unless' allows skipping ERT tests.
524 See the ERT manual for details.
529 *** `eshell' now supports visual subcommands and options
530 Eshell has been able to handle "visual" commands (interactive,
531 non-line oriented commands such as top that require display
532 capabilities not provided by eshell) by running them in an Emacs
533 terminal emulator. See `eshell-visual-commands'.
535 This feature has been extended to subcommands and options that make a
536 usually line-oriented command a visual command. Typical examples are
537 "git log" and "git <command> --help" which display their output in a
538 pager by default. See `eshell-visual-subcommands' and
539 `eshell-visual-options'.
542 *** Added Eshell-Tramp module
543 External su and sudo commands are now the default; the internal,
544 Tramp-using variants can still be used by enabling the eshell-tramp
549 *** New option `f90-smart-end-names'.
551 ** Icomplete is a bit more like Ido.
553 *** key bindings to navigate through and select the completions.
555 *** The icomplete-separator is customizable, and its default has changed.
557 *** Removed icomplete-show-key-bindings.
559 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
560 (setq icomplete-with-completion-tables '(internal-complete-buffer))
561 will revert to the old behavior.
565 *** Ido has a manual now.
567 *** `ido-use-virtual-buffers' takes a new value 'auto.
569 *** `ido-decorations' has been slightly extended to give a bit more control.
574 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
575 visit the next image file and the previous image file in the same
576 directory, respectively.
579 *** New commands to show specific frames of multi-frame images.
580 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
581 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
584 *** New commands to speed up, slow down, or reverse animation.
585 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
586 speed up and slow down the animation. `a r' (`image-reverse-speed')
587 to reverse it and `a 0' (`image-reset-speed') to reset it.
590 *** The command `image-mode-fit-frame' deletes other windows.
591 When toggling, it restores the frame's previous window configuration.
592 It also has an optional frame argument, which can be used by Lisp
593 callers to fit the image to a frame other than the selected frame.
597 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
598 will cycle through faces in `hi-lock-face-defaults' without prompting.
601 *** New global command `M-s h .' (`highlight-symbol-at-point')
602 highlights the symbol found near point without prompting,
603 using the next face automatically.
607 *** New option `imenu-generic-skip-comments-and-strings'.
611 *** New face `info-index-match' is used to highlight matches in index
612 entries displayed by `Info-index-next', `Info-virtual-index' and
617 *** Better indentation of multiple-variable declarations.
618 If declaration spans several lines, variables on the following lines
619 are lined up to the first one.
621 *** We now recognize and better indent continuations in array
624 *** New option `js-switch-indent-offset`.
626 ** MH-E has been updated to MH-E version 8.5.
627 See MH-E-NEWS for details.
631 *** Font locking for texinfo comments and new keywords
632 *** Completion in Octave file buffers
634 *** Jump to definition
635 *** Documentation lookup/search
636 *** Code cleanup and various bug fixes
638 ** OPascal mode is the new name for Delphi mode.
640 *** All delphi-* variables and functions have been renamed to opascal-*.
641 *** `delphi-newline-always-indents' is not supported any more.
642 Use `electric-indent-mode' instead.
643 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
647 *** The format of `archive-contents' files, generated by package
648 repositories, has changed to allow a new (fifth) element in the data
649 vectors, containing an associative list with extra properties.
651 *** `describe-package' buffer uses the `:url' extra property to
652 display a `Homepage' header, if it's present.
654 *** In the buffer produced by `describe-package', there are now buttons
655 listing the keywords related to that package. You can click on them
656 to see other packages related to any given keyword.
658 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
659 the packages by a keyword.
663 *** `prolog-use-smie' has been removed, along with the non-SMIE
668 *** The new command `remember-notes' creates a buffer which is saved
671 You may think of it as a *scratch* buffer whose content is preserved.
672 In fact, it was designed as a replacement for *scratch* buffer and can
673 be used that way by setting `initial-buffer-choice' to
674 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
675 Without the second change, *scratch* buffer will still be there for
676 notes that do not need to be preserved.
678 *** The Remember package can now store notes in separates files.
679 You can use the new function `remember-store-in-files' within the
680 `remember-handler-functions' option.
682 See `remember-data-directory' and `remember-directory-file-name-format'
683 for new options related to this function.
687 *** Customize `rmail-mbox-format' to influence some minor aspects of
688 how Rmail displays non-MIME messages.
691 *** The `unrmail' command now converts from BABYL to mboxrd format,
692 rather than mboxo. Customize `unrmail-mbox-format' to change this.
696 *** New option `ruby-encoding-magic-comment-style'.
698 *** New option `ruby-custom-encoding-magic-comment-template'.
702 *** Improved syntax highlighting and indentation.
704 *** Add more Ruby file types to `auto-mode-alist'.
706 *** New option `ruby-align-to-stmt-keywords'.
708 *** New `electric-indent-mode' integration.
710 ** Search and Replace
713 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
714 starts a symbol (identifier) incremental search forward with the
715 symbol found near point added to the search string initially.
718 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
719 and adds it to the search string.
721 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
722 between nil and the value of the option `search-invisible' (or `open'
725 *** `query-replace' skips invisible text when `search-invisible' is nil,
726 and opens overlays with hidden text when `search-invisible' is `open'.
729 *** A negative prefix arg of replacement commands replaces backward.
730 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
731 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
734 *** By default, prefix arguments do not now terminate Isearch mode.
735 Set `isearch-allow-prefix' to nil to restore old behavior.
738 *** More Isearch commands accept prefix arguments, namely
739 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
743 *** Word search now matches whitespace at the beginning/end
744 of the search string if it contains leading/trailing whitespace.
745 In an incremental word search or when using a non-nil LAX argument
746 of `word-search-regexp', the lax matching can also match part of
747 the first word (in addition to the lax matching of the last word).
748 The same rules are now applied to the symbol search with the difference
749 that it matches symbols, and non-symbol characters between symbols.
754 *** New command `ses-rename-cell' allows assigning names to SES cells.
758 *** `explicit-bash-args' now always defaults to use --noediting.
759 During initialization, Emacs no longer expends a process to decide
760 whether it is safe to use Bash's --noediting option. These days
761 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
765 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
766 You can pick the name of the function and the variables with `C-x 4 a'.
768 *** The SMIE indentation engine is now used by default.
770 ** SMIE indentation can be customized via `smie-config'.
771 The customization can be guessed by Emacs by providing a sample indented
772 file and letting SMIE learn from it.
776 *** New option `term-suppress-hard-newline'.
778 ** Todo mode has been rewritten and enhanced.
779 New features include:
780 - support for multiple todo files and archive files of done items;
781 - renaming, reordering, moving, merging, and deleting categories;
782 - sortable tabular summaries of categories and the types of items they contain;
783 - cross-category lists of items filtered by specific criteria;
784 - more fine-grained interaction with the Emacs diary, by being able to decide
785 for each todo item whether it appears in the Fancy Diary display;
786 - highly flexible new item insertion and item editing;
787 - moving items between categories, storing done items in their category or in
788 archive files, undoing or unarchiving done items;
789 - reprioritizing items by inputting a numerical priority;
790 - extensive customizability of operation and display, including numerous faces.
791 The Todo mode user manual describes all commands and most user options.
792 To support some of these features, a new file format is used, which is
793 incompatible with the old format; however, you can convert old todo and done
794 item files to the new format on initializing the first new todo file, or at any
795 later time with the provided conversion command. The old version of
796 todo-mode.el has been made obsolete and renamed otodo-mode.el.
798 ** trace-function was largely rewritten.
799 New features include:
800 - no prompting for the destination buffer, unless a prefix-arg was used.
801 - additionally to prompting for a destination buffer, when a prefix-arg is
802 used, the user can enter a "context", i.e. Lisp expression whose value at the
803 time the function is entered/exited will be printed along with the function
804 name and arguments. Useful to trace the value of (current-buffer) or
805 (point) when the function is invoked.
809 *** The experimental url syntax for remote file names is withdrawn.
812 *** New connection method "adb", which allows to access Android
813 devices by the Android Debug Bridge. The variable `tramp-adb-program'
814 can be used to adapt the path of the "adb" program, if needed.
816 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
817 "scpc" and "rsyncc" are discontinued. The ssh option
818 "ControlMaster=auto" is set automatically in all ssh-based methods,
822 *** Handlers for `file-acl' and `set-file-acl' for remote machines
823 which support POSIX ACLs.
826 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
827 for remote machines which support filesystem notifications.
829 ** New command `url-cookie-list' displays all the current cookies, and
830 allows deleting selected cookies.
832 ** VC and related modes
835 *** In VC directory mode, `D' displays diffs between VC-controlled
836 whole tree revisions.
839 *** In VC directory mode, `L' lists the change log for the current VC
840 controlled tree in a window.
843 *** In VC directory mode, `I' shows a log of changes that will be
844 received with a pull operation.
847 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
848 under current version control system. When called with a prefix
849 argument, you can remove a file from the ignored file list.
852 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
853 because it is moved to vc-cvs.el.
857 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
859 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
863 *** The commands `woman-default-faces' and `woman-monochrome-faces'
864 are obsolete. Customize the `woman-*' faces instead.
866 ** Obsolete packages:
868 *** Iswitchb is made obsolete by icomplete-mode.
870 *** longlines.el is obsolete; use visual-line-mode instead.
875 *** terminal.el is obsolete; use term.el instead.
877 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
879 *** xesam.el is obsolete, because the XESAM project has been canceled.
882 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
885 *** The Info-edit command is obsolete. Editing Info nodes by hand
886 has not been relevant for some time.
889 * New Modes and Packages in Emacs 24.4
891 ** New package `eww' is a built-in web browser.
892 It is only available if Emacs is compiled with libxml2 support.
894 ** New minor mode `superword-mode', defined in subword.el
895 `superword-mode' overrides the default word motion commands to treat
896 symbol_words as a single word, similar to what `subword-mode' does and
897 using the same internal functions.
899 ** New package nadvice.el offers lighter-weight advice facilities.
901 - add-function/remove-function which can be used to add/remove code on any
902 function-carrying place, such as process-filters or `<foo>-function' hooks.
903 - advice-add/advice-remove to add/remove a piece of advice on a named function,
904 much like `defadvice' does.
906 ** New package frameset.el.
907 It provides a set of operations to save a frameset (the state of all
908 or a subset of the existing frames and windows, somewhat similar to a
909 frame configuration), both in-session and persistently, and restore it
910 at some point in the future.
913 ** New package filenotify.el provides an interface for file system
914 notifications. It requires that Emacs be compiled with one of the
915 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
918 * Incompatible Lisp Changes in Emacs 24.4
921 ** `kill-region' lost its `yank-handler' optional argument.
924 ** `(input-pending-p)' no longer runs other timers which are ready to
925 run. The new optional CHECK-TIMERS param allows for the prior behavior.
928 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
931 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
932 Some languages match those as »...« and others as «...» so better stay neutral.
935 ** In compiled Lisp files, the header no longer includes a timestamp.
938 ** The default file coding for Emacs Lisp files is now utf-8.
939 (See `file-coding-system-alist'.) In most cases, this change is
940 transparent, but files that contain unusual characters without
941 specifying an explicit coding system may fail to load with obscure
942 errors. You should either convert them to utf-8 or add an explicit
946 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
947 It used to disable the minor mode, major mode, and text-property keymaps,
948 whereas now it simply has higher precedence.
950 ** Default process filters and sentinels are not nil any more.
951 Instead they default to a function which does what the nil value used to do.
954 ** `read-event' does not return decoded chars in ttys any more.
955 As was the case in Emacs 22 and before, the decoding of terminal
956 input, according to `keyboard-coding-system', is not performed in
957 `read-event' any more. But unlike in Emacs 22, this decoding is still
958 done before input-decode-map, function-key-map, etc.
961 ** Removed `inhibit-local-menu-bar-menus'.
964 ** Frame-local variables that affect redisplay do not work any more.
965 More specifically, the redisplay does not bother to check for a frame-local
966 value when looking up variables.
969 ** nil and "unbound" are indistinguishable in `symbol-function'.
970 `symbol-function' does not signal a `void-function' error any more.
971 To determine if a symbol's function definition is void, use `fboundp'.
974 ** `defadvice' does not honor the `freeze' flag and cannot advise
975 special-forms any more.
978 ** `dolist' no longer binds VAR while evaluating the RESULT form,
979 when lexical binding is enabled. Previously, VAR was bound to nil,
980 which often led to spurious unused-variable warnings.
983 ** The return value of `backup-buffer' has changed.
984 The second argument is no longer an SELinux context, instead it is an
985 alist of extended attributes as returned by the new function
986 `file-extended-attributes'. The attributes can be applied to another
987 file using `set-file-extended-attributes'.
990 ** By default `copy-file' no longer copies file permission bits to an
991 existing destination; and it sets the file permission bits of a newly
992 created destination to those of the source, masked by the default file
993 permissions. To copy the file permission bits, pass t as the
994 PRESERVE-PERMISSIONS argument of `copy-file'.
997 ** `visited-file-modtime' now returns -1 for nonexistent files.
998 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
999 in the presence of files with negative time stamps.
1002 ** The cars of the elements in `interpreter-mode-alist' are now
1003 treated as regexps rather than literal strings.
1006 * Lisp Changes in Emacs 24.4
1009 ** The second argument of `eval' can now specify a lexical environment.
1012 ** New functions `special-form-p' and `macrop'.
1014 ** New macro `define-alternatives' can be used to define generic commands.
1015 Generic commands are interactive functions whose implementation can be
1016 selected among several alternatives, as a matter of user preference.
1018 ** The `defalias-fset-function' property lets you catch `defalias'
1019 calls, and redirect them to your own function, instead of `fset'.
1022 ** New variable `enable-dir-local-variables'.
1023 Directory-local variables are ignored if this is nil. This may be
1024 useful for modes that want to ignore directory-locals while still
1025 respecting file-local variables.
1028 ** New function `get-pos-property'.
1030 ** Completion changes
1032 *** The separator for `completing-read-multiple' can now be a regexp.
1033 The default separator has been changed to allow surrounding spaces
1036 *** The `common-substring' arg of `display-completion-list' is obsolete.
1037 Either use `completion-all-completions', which returns highlighted
1038 strings (including for partial or substring completion), or call
1039 `completion-hilit-commonality' to add the highlight.
1041 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1042 let you enable symbol prettification (replacing a string like "lambda" with
1043 the Greek lambda character).
1048 *** Functions to pop up menus and dialogs now work on all terminals,
1049 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1050 `message-box', `yes-or-no-p', etc.
1052 The function `display-popup-menus-p' will now return non-nil for a
1053 display or frame whenever a mouse is supported on that display or
1056 *** New hook `tty-setup-hook'.
1060 *** New display action function `display-buffer-no-window' to not
1061 display the buffer in a window.
1063 *** New display action alist entry `allow-no-window' to indicate the
1064 caller of `display-buffer' is ready to handle the case of not
1065 displaying the buffer in a window.
1067 ** New hook `pre-redisplay-function'.
1070 ** New bool-vector set operation functions:
1071 *** `bool-vector-exclusive-or'
1072 *** `bool-vector-union'
1073 *** `bool-vector-intersection'
1074 *** `bool-vector-set-difference'
1075 *** `bool-vector-not'
1076 *** `bool-vector-subsetp'
1077 *** `bool-vector-count-consecutive'
1078 *** `bool-vector-count-population'
1081 ** Comparison functions =, <, >, <=, >= now take many arguments.
1083 ** Error-handling changes
1086 *** New function `define-error'.
1088 *** `with-demoted-errors' takes an additional argument `format'.
1091 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
1093 ** New library subr-x.el for misc helper functions
1095 *** `hash-table-keys'
1097 *** `hash-table-values'
1099 *** `string-blank-p`
1100 *** `string-empty-p`
1102 *** `string-reverse`
1103 *** `string-trim-left'
1104 *** `string-trim-right'
1106 *** `string-remove-prefix'
1107 *** `string-remove-suffix'
1110 ** Obsoleted functions:
1113 *** `lisp-complete-symbol'
1114 *** `field-complete'
1115 *** `minibuffer-completion-contents'
1116 *** `isearch-nonincremental-exit-minibuffer'
1117 *** `isearch-filter-visible'
1118 *** `generic-make-keywords-list'
1119 *** `get-upcase-table' (use `case-table-get-table' instead).
1121 ** `with-wrapper-hook' is obsoleted by `add-function'.
1122 The few hooks that used with-wrapper-hook are replaced as follows:
1123 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1124 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1125 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1128 ** `byte-compile-interactive-only-functions' is now obsolete.
1129 To specify that a command should only be called interactively, give it
1130 a non-nil `interactive-only' property.
1133 ** `split-string' now takes an optional argument TRIM.
1134 The value, if non-nil, is a regexp that specifies what to trim from
1135 the start and end of each substring.
1138 ** New function `string-suffix-p'.
1140 ** File-handling changes
1143 *** Support for filesystem notifications.
1144 Emacs now supports notifications of filesystem changes, such as
1145 creation, modification, and deletion of files. This requires the
1146 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1147 MS-Windows systems, this is supported for Windows XP and newer
1151 *** The 9th element returned by `file-attributes' is now unspecified.
1152 Formerly, it was t if the file's gid would change if file were deleted
1153 and recreated. This value has been inaccurate for years on many
1154 platforms, and nobody seems to have noticed or cared.
1157 *** The 6th argument to `copy-file' has been renamed to
1158 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1159 Unix file permission bits as well as SELinux context.
1162 *** The function `file-ownership-preserved-p' now has an optional
1163 argument GROUP which causes it check for file group too. This can be
1164 used in place of the 9th element of `file-attributes'.
1167 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1168 argument, with the same interpretation as the returned value of
1169 `visited-file-modtime'.
1171 ** Changes in autorevert.el
1174 *** If Emacs is compiled with file notification support, notifications
1175 are used instead of checking the time stamp of the files. You can
1176 disable this by setting the user option `auto-revert-use-notify' to
1177 nil. Alternatively, a regular expression of directories to be
1178 excluded from file notifications can be specified by
1179 `auto-revert-notify-exclude-dir-regexp'.
1182 *** The new user option `auto-revert-remote-files' enables reversion
1183 of remote files when set to non-nil.
1187 *** The function `face-spec-set' is now like `setq' for face specs.
1188 Its third arg now accepts values specifying a face spec type (defface,
1189 custom, or override spec), and the relevant spec is set accordingly.
1192 *** New function `add-face-text-property', which can be used to
1193 conveniently prepend/append new face properties.
1195 *** Face specs set via Custom themes now replace the `defface' spec
1196 rather than inheriting from it (as do face specs set via Customize).
1198 *** New face characteristic (supports :underline (:style wave))
1199 specifies whether or not the terminal can display a wavy line.
1202 *** New face spec attribute :distant-foreground
1203 specifies foreground to use if background color is near the foreground
1204 color that would otherwise have been used.
1209 *** `image-animated-p' is now `image-multi-frame-p'.
1210 It returns non-nil for any image that contains multiple frames,
1211 whether or not it specifies a frame delay.
1214 *** New variable `image-default-frame-delay' gives the frame delay for
1215 animated images which do not specify a frame delay.
1218 *** New functions `image-current-frame' and `image-show-frame' for getting
1219 and setting the current frame of a multi-frame image.
1223 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1224 **** object-name -> eieio-object-name
1225 **** object-class -> eieio-object-class
1226 **** object-class-fast -> eieio--object-class
1227 **** object-name-string -> eieio-object-name-string
1228 **** object-num-slots -> eieio--object-num-slots
1229 **** object-set-name-string -> eieio-object-set-name-string
1230 **** class-parent -> eieio-class-parent
1231 **** class-parents -> eieio-class-parents
1232 **** class-children -> eieio-class-children
1233 **** class-num-slots -> eieio--class-num-slots
1234 **** class-precedence-list -> eieio-class-precedence-list
1235 **** All generated class-* and object-* field accessors are now
1236 prefixed with `eieio-' as well.
1238 *** Obsoleted functions:
1240 **** class-direct-subclasses
1241 **** class-direct-superclasses
1243 ** Changes in encoding and decoding of text
1246 *** New coding-system `prefer-utf-8'.
1247 This is like `undecided' but prefers UTF-8 on decoding if the text to
1248 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1249 any non-ASCII characters are automatically encoded as UTF-8.
1252 *** New attributes of coding-systems whose type is `undecided'.
1253 Two new attributes, `:inhibit-null-byte-detection' and
1254 `:inhibit-iso-escape-detection', determine how to detect encoding of
1255 text that includes null bytes and ISO-2022 escape sequences,
1256 respectively. Each of these attributes can be either nil, zero, or
1257 t. If it is t, decoding text ignores null bytes and, respectively,
1258 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1259 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1260 text is encoded in one of the ISO-2022 encodings, such as
1261 iso-2022-7bit. If the value is zero, Emacs consults the variables
1262 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1264 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1265 UTF-8 encoding and decoding, whenever possible.
1267 These attributes are only meaningful for coding-systems of type
1268 `undecided'. (The type of a coding-system is determined by its
1269 `:coding-type' attribute and can be accessed by calling the
1270 `coding-system-type' function.)
1272 ** `time-to-seconds' is not obsolete any more.
1274 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1275 When you edit DIR/FILE, Emacs normally creates a symbolic link
1276 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1277 is being edited. Formerly, if there was already a non-symlink file
1278 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1279 through DIR/.#FILE.9. These fallbacks have been removed, so that
1280 Emacs now no longer locks DIR/FILE in that case.
1282 On file systems that do not support symbolic links, the lock is now a
1283 regular file with contents being what would have been in the symlink.
1286 ** New functions `group-gid' and `group-real-gid'.
1288 ** The spelling of the rx.el category `chinese-two-byte' has been
1289 corrected (the first 'e' was missing).
1291 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1294 *** The package descriptor and name of global variables, constants,
1295 and functions should be separated by two hyphens if the symbol is not
1296 meant to be used by other packages.
1299 * Changes in Emacs 24.4 on Non-Free Operating Systems
1301 ** The procedure for building Emacs on MS-Windows has changed.
1302 It is now built by running the same configure script as on all other
1303 platforms. This requires the MSYS environment and MinGW development
1304 tools. See the updated instructions in nt/INSTALL for details.
1306 Using the Posix configure script and Makefile's also means a change in
1307 the directory structure of the Emacs installation on Windows. It is
1308 now the same as on GNU and Unix systems. In particular, the auxiliary
1309 programs, such as cmdproxy.exe and hexl.exe, are in
1310 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1311 version), version-independent site-lisp is in share/emacs/site-lisp,
1312 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1313 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1314 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1315 directories and will find the files in there automatically; there's no
1316 need to set any variables due to this change.)
1319 ** Emacs on Windows 2000 and later can now access files and directories
1320 whose names cannot be encoded in the current system codepage.
1322 The new variable `w32-unicode-filenames' controls this feature: if it
1323 is t, Emacs uses Unicode APIs to pass file names to system calls,
1324 which lifts the limitation of file names to the current locale.
1327 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1328 The backtrace is written to the 'emacs_backtrace.txt' file in the
1329 directory where Emacs was running.
1332 ** The variable `buffer-file-type' is no longer supported.
1333 Setting it has no effect, and %t in the mode-line format is ignored.
1334 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1335 modifying it has no effect.
1338 ** Lock files now work on MS-Windows.
1339 This allows to avoid losing your edits if the same file is being
1340 edited in another Emacs session or by another user. See the node
1341 "Interlocking" in the Emacs User Manual for the details. To disable
1342 file locking, customize `create-lockfiles' to nil.
1344 ** Improved fullscreen support on Mac OS X.
1345 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1346 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1347 native is the default.
1349 ** OSX >= 10.7 can use sRGB colorspace.
1350 Customize `ns-use-srgb-colorspace' to change style. t is the default.
1351 Note: This does not apply to images.
1354 * Installation Changes in Emacs 24.3
1356 ** The default X toolkit is now Gtk+ version 3.
1357 If you don't pass `--with-x-toolkit' to configure, or if you use
1358 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1359 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1360 You can explicitly require a specific version by passing
1361 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1363 ** New configure option `--enable-link-time-optimization', to utilize
1364 an appropriate feature provided by GCC since version 4.5.0.
1366 ** New configure option `--without-all' to disable most of the optional
1367 features (image support, etc.) that are normally enabled by default.
1369 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1370 Emacs). If building with GCC, this enables compile-time checks that
1371 warn/give errors about possibly-questionable C code. On a recent GNU
1372 system there should be no warnings; on older and on non-GNU systems
1373 the results may be useful to developers.
1375 ** The configure option `--enable-use-lisp-union-type' has been
1376 renamed to `--enable-check-lisp-object-type', as the resulting
1377 Lisp_Object type no longer uses a union to implement the compile time
1378 check that this option enables.
1380 ** The configure option `--disable-maintainer-mode' has been removed,
1381 as it was confusingly-named and rarely useful.
1383 ** The configure options `--program-prefix', `--program-suffix', and
1384 `--program-transform-name' apply to more than just the installed
1385 binaries. Now they also affect the man pages, icons, and the
1386 etc/emacs.desktop file; but not the info pages, since this would break
1387 links between the various manuals.
1389 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1390 overwriting "emacs" in the installation bin/ directory with a link
1393 ** Emacs uses libtinfo in preference to libncurses, if available.
1395 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1396 /usr/pkg/lib to the linker search path. You must add them yourself if
1399 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1400 (from the bin and libexec directories, respectively). The former is
1401 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1404 * Startup Changes in Emacs 24.3
1406 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1407 lisp/ directory. There should not be any there anyway. If you have
1408 been adding them there, put them somewhere else; e.g., site-lisp.
1410 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1413 * Changes in Emacs 24.3
1417 *** `C-h f' (`describe-function') can now perform autoloading.
1418 When this command is called for an autoloaded function whose docstring
1419 contains a key substitution construct, that function's library is
1420 automatically loaded, so that the documentation can be shown
1421 correctly. To disable this, set `help-enable-auto-load' to nil.
1423 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1424 even after their associated libraries have been loaded (and the
1425 autoloads have been redefined as functions).
1429 *** Images displayed via ImageMagick now support transparency and the
1430 :background image specification property.
1432 *** When available, ImageMagick support is automatically enabled.
1433 It is no longer necessary to call `imagemagick-register-types'
1434 explicitly to install ImageMagick image types; that function is called
1435 automatically at startup, or when customizing an imagemagick- option.
1437 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1438 ImageMagick to view images. (You must call `imagemagick-register-types'
1439 afterwards if you do not use customize to change this.)
1441 *** The new variable `imagemagick-enabled-types' also affects which
1442 ImageMagick types are treated as images. The function
1443 `imagemagick-filter-types' returns the list of types that will be
1448 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1449 next and previous path separator, respectively.
1451 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1452 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1453 non-nil before enabling the mode.
1457 *** New option `mode-line-default-help-echo' specifies the help text
1458 (shown in a tooltip or in the echo area) for any part of the mode line
1459 that does not have its own specialized help text.
1461 *** You can now click mouse-3 in the coding system indicator to invoke
1462 `set-buffer-file-coding-system'.
1464 ** Server and client
1466 *** emacsclient now obeys string values for `initial-buffer-choice',
1467 if it is told to open a new frame without specifying any file to visit
1468 or expression to evaluate.
1470 *** New option `server-auth-key' specifies a shared server key.
1472 ** Emacs now generates backtraces on fatal errors.
1473 On encountering a fatal error, Emacs now outputs a textual description
1474 of the fatal signal, and a short backtrace on platforms like glibc
1475 that support backtraces.
1477 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1478 This minor mode replaces `toggle-read-only', which is now obsolete.
1480 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1481 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1482 respectively, without exiting from the prompt.
1484 ** In the Package Menu, newly-available packages are listed as "new",
1485 and sorted above the other "available" packages by default.
1487 ** If your Emacs was built from a repository checkout, the new variable
1488 `emacs-bzr-version' contains information about the bzr revision used.
1490 ** New option `create-lockfiles' specifies usage of lockfiles.
1491 It defaults to t. Changing it to nil inhibits the creation of lock
1492 files (use this with caution).
1494 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1495 variables on remote hosts.
1497 ** The entry for PCL-CVS has been removed from the Tools menu.
1498 The PCL-CVS commands are still available via the keyboard.
1500 ** Using "unibyte: t" in Lisp source files is obsolete.
1501 Use "coding: raw-text" instead.
1503 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1504 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1505 The previous binding, introduced in Emacs 24.1, was a mistake, because
1506 `C-c LETTER' bindings are reserved for user customizations.
1508 ** Internationalization
1510 *** New language environment: Persian.
1512 *** New input method `vietnamese-vni'.
1514 ** Nextstep (GNUstep / Mac OS X) port
1516 *** Support for fullscreen and the frame parameter fullscreen.
1518 *** A file dialog is used for open/save operations initiated from the
1522 * Editing Changes in Emacs 24.3
1524 ** Search and Replace
1526 *** Non-regexp Isearch now performs "lax" space matching.
1527 Each sequence of spaces in the supplied search string may match any
1528 sequence of one or more whitespace characters, as specified by the
1529 variable `search-whitespace-regexp'. (This variable is also used by a
1530 similar existing feature for regexp Isearch.)
1532 *** New Isearch command `M-s SPC' toggles lax space matching.
1533 This applies to both ordinary and regexp Isearch.
1535 *** New option `replace-lax-whitespace'.
1536 If non-nil, `query-replace' uses flexible whitespace matching too.
1539 *** Global `M-s _' starts a symbol (identifier) incremental search,
1540 and `M-s _' in Isearch toggles symbol search mode.
1541 `M-s c' in Isearch toggles search case-sensitivity.
1543 ** Navigation commands
1545 *** New binding `M-g c' for `goto-char'.
1547 *** New binding `M-g TAB' for `move-to-column'.
1549 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1550 interactively with no prefix arg. Previously, it moved to column 1.
1552 ** New option `yank-handled-properties' allows processing of text
1553 properties on yanked text, in ways that are more general than just
1554 removing them (as is done by `yank-excluded-properties').
1556 ** New option `delete-trailing-lines' specifies whether
1557 M-x delete-trailing-whitespace should delete trailing lines at the end
1558 of the buffer. It defaults to t.
1560 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1562 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1563 `ucs-insert' is now an obsolete alias for `insert-char'.
1565 ** The `z' key no longer has a binding in most special modes.
1566 It used to be bound to `kill-this-buffer', but `z' is too easy to
1569 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1570 It copies the region-rectangle as the last rectangle kill.
1574 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1576 *** New option `register-separator' specifies the register containing
1577 the text to put between collected texts for use with
1578 M-x append-to-register and M-x prepend-to-register.
1581 * Changes in Specialized Modes and Packages in Emacs 24.3
1583 ** Common Lisp emulation (CL)
1585 *** CL's main entry is now (require 'cl-lib).
1586 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1587 i.e., all its definitions have the "cl-" prefix (and internal definitions
1588 use the "cl--" prefix).
1590 If `cl' provided a feature under the name `foo', then `cl-lib'
1591 provides it under the name `cl-foo' instead; with the exceptions of the
1592 few `cl' definitions that had to use `foo*' to avoid conflicts with
1593 pre-existing Elisp entities. These have been renamed to `cl-foo'
1594 rather than `cl-foo*'.
1596 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1597 provide the old, non-prefixed names. Some exceptions are listed below:
1599 *** `cl-flet' is not like `flet' (which is deprecated).
1600 Instead it obeys the behavior of Common-Lisp's `flet'.
1601 In particular, in cl-flet function definitions are lexically scoped,
1602 whereas in flet the scoping is dynamic.
1604 *** `cl-labels' is slightly different from `labels'.
1605 The difference is that it relies on the `lexical-binding' machinery
1606 (as opposed to the `lexical-let' machinery used previously) to capture
1607 definitions in closures, so such closures will only work if `lexical-binding'
1610 *** `cl-letf' is not exactly like `letf'.
1611 The only difference is in details that relate to some deprecated usage
1612 of `symbol-function' in place forms.
1614 *** `progv' was rewritten to use the `let' machinery.
1615 A side effect is that variables without corresponding values are bound
1616 to nil rather than being made unbound.
1618 *** The following methods of extending `setf' are obsolete
1619 (use features from gv.el instead):
1620 `define-modify-macro' (use `gv-letplace')
1621 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1622 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1623 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1627 *** Changes are now highlighted using the same color scheme as in
1628 modern VCSes. Deletions are displayed in red (new faces
1629 `diff-refine-removed' and `smerge-refined-removed', and new definition
1630 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1631 and `smerge-refined-added', and new definition of `diff-added').
1633 *** The variable `diff-use-changed-face' defines whether to use the
1634 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1635 changes in context diffs.
1637 *** The new command `diff-delete-trailing-whitespace' removes trailing
1638 whitespace introduced by a diff.
1640 ** Ediff now uses the same color scheme as Diff mode.
1644 A new version of python.el, which provides several new features, including:
1645 per-buffer shells, better indentation, Python 3 support, and improved
1646 shell-interaction compatible with iPython (and virtually any other
1649 *** Some user options have been replaced/renamed, including (old -> new):
1650 **** python-indent -> python-indent-offset
1651 **** python-guess-indent -> python-indent-guess-indent-offset
1652 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1653 **** python-use-skeletons -> python-skeleton-autoinsert
1655 *** Some user options have been removed, including:
1657 **** `python-indent-string-contents': Strings are never indented.
1659 **** `python-honour-comment-indentation':
1660 Comments are always considered as indentation markers.
1662 **** `python-continuation-offset': Indentation is automatically
1663 calculated in a pep8 compliant way depending on the context.
1665 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1666 Have no direct mapping as the shell interaction is completely different.
1668 **** `python-python-command', `python-jython-command':
1669 Replaced by `python-shell-interpreter'.
1671 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1672 `python-pdbtrack-minor-mode-string', `python-source-modes':
1675 *** Some commands have been replaced (old -> new):
1676 **** python-insert-class -> python-skeleton-class
1677 **** python-insert-def -> python-skeleton-def
1678 **** python-insert-for -> python-skeleton-for
1679 **** python-insert-if -> python-skeleton-if
1680 **** python-insert-try/except -> python-skeleton-try
1681 **** python-insert-try/finally -> python-skeleton-try
1682 **** python-insert-while -> python-skeleton-while
1683 **** python-find-function -> python-nav-jump-to-defun
1684 **** python-next-statement -> python-nav-forward-sentence
1685 **** python-previous-statement -> python-nav-backward-sentence
1686 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1687 **** python-end-of-defun-function -> python-nav-end-of-defun
1688 **** python-send-buffer -> python-shell-send-buffer
1689 **** python-send-defun -> python-shell-send-defun
1690 **** python-send-region -> python-shell-send-region
1691 **** python-send-region-and-go -> emulate with python-shell-send-region
1692 and python-shell-switch-to-shell
1693 **** python-send-string -> python-shell-send-string
1694 **** python-switch-to-python -> python-shell-switch-to-shell
1695 **** python-describe-symbol -> python-eldoc-at-point
1699 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1701 *** The D-Bus object manager interface is implemented.
1703 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1704 if their value does not fit into Emacs's integer range.
1706 *** The function `dbus-call-method' is now non-blocking.
1707 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1709 *** Signals can also be sent as unicast messages.
1711 *** The argument list of `dbus-register-signal' has been extended,
1712 according to the new match rule types of D-Bus.
1714 *** `dbus-init-bus' supports private connections.
1716 *** There is a new function `dbus-setenv'.
1718 ** `desktop-path' no longer includes the "." directory.
1719 Desktop files are now located in ~/.emacs.d by default.
1723 *** `dired-do-async-shell-command' executes each file sequentially
1724 if the command ends in `;' (when operating on multiple files).
1725 Otherwise, it executes the command on each file in parallel.
1727 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1728 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1731 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1732 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1733 mark/unmark/flag all files in the active region.
1735 *** The minibuffer default for `=' (`dired-diff') has changed.
1736 It is now the backup file for the file at point, if one exists.
1737 In Transient Mark mode the default is the file at the active mark.
1739 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1740 The global binding for `M-=', `count-words-region' is in effect.
1744 *** New module "notifications", which can send a notification when you
1745 receive a private message or your nickname is mentioned.
1747 *** ERC will look up server/channel names via auth-source and use any
1750 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1751 only applies to messages sent by lurkers.
1753 ** reStructuredText mode
1755 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1756 fontification, comment handling, and customization have all been revised
1759 *** Support for `imenu' and `which-function-mode'.
1761 *** The reStructuredText syntax is more closely covered.
1762 Sphinx support has been improved.
1764 *** `rst-insert-list' inserts new list or continues existing lists.
1766 *** A negative prefix argument always works for `rst-adjust'.
1768 *** The window configuration is reset after displaying a TOC.
1770 *** The constant `rst-version' describes the rst.el package version.
1774 *** Support for percent literals and recognition of regular expressions
1775 in method calls without parentheses with more methods, including Cucumber
1778 *** Improved syntax highlighting and indentation.
1780 *** New command `ruby-toggle-block', bound to `C-c {'.
1782 *** Some non-standard keybindings/commands have been removed:
1784 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1786 **** `ruby-mark-defun'; use `mark-defun'.
1788 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1789 appropriate settings for the variables `beginning-of-defun-function'
1790 and `end-of-defun-function'.
1792 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1793 `reindent-then-newline-and-indent' and `newline' have been removed.
1795 ** Shell Script mode
1797 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1799 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1801 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1805 *** The free software compiler GHDL is supported (and now the default).
1807 *** Support for the VHDL-AMS packages has been added/updated.
1809 *** Updated to the 2002 revision of the VHDL standard.
1811 *** Accepts \r and \f as whitespace.
1815 *** The faces used by Apropos are now directly customizable.
1816 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1817 see the `apropos' Custom group for details.
1819 *** The old options whose values specified faces to use have been removed
1820 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1824 *** This package has been rewritten to use Tabulated List mode.
1826 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1827 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1831 *** Algebraic simplification mode is now the default.
1832 To restrict to the limited simplifications given by the former
1833 default simplification mode, use `m I'.
1837 *** You can customize the header text that appears above each calendar month.
1838 See the variable `calendar-month-header'.
1840 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1842 *** The calendars produced by cal-html include holidays.
1843 Customize `cal-html-holidays' to change this.
1847 *** The major modes from the parser generators "Bovine" and "Wisent"
1848 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1849 are in `auto-mode-alist', and the corresponding manuals are included.
1853 **** Menu support for the "Configuration" feature. This allows users to
1854 choose the active configuration (such as debug or install) from the menu.
1856 **** New command `ede-set' to interactively set project-local variables.
1858 **** Support for compiling, debugging, and running in "generic" projects.
1860 **** Autoconf editing support for M4 macros with complex arguments.
1862 **** Compilation support for the "linux" project type.
1864 **** "simple" projects have been removed; use "generic" projects instead.
1868 **** Support for parsing #include statements inside a namespace in C/C++.
1870 **** Improved support for 'extern "C"' declarations in C/C++.
1872 **** The ability to ignore more common special C/C++ preprocessor symbols,
1873 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1874 If available, include cdefs.h as an additional source of preprocessor symbols.
1876 **** Improved C/C++ function pointer parsing.
1878 **** In Python, support for converting imports to include file names.
1880 **** Ability to dynamically determine the Python load path.
1882 **** Support for the Python 'WITH' and 'AT' keywords.
1884 **** Improved tooltip completion.
1888 **** The SRecode manual is now included.
1890 **** Tag generation supports constructor/destructor settings and system
1891 include differentiation.
1893 **** Addition of 'Framework' support: Frameworks are specified when a
1894 particular kind of library (such as Android) is needed in a common language
1897 **** Support for nested templates and let variables override based on priority.
1899 **** Support for merging tables from multiple related modes, such as
1900 default -> c++ -> arduino.
1902 ** Compile has a new option `compilation-always-kill'.
1906 *** `custom-reset-button-menu' now defaults to t.
1908 *** Non-option variables are never matched in `customize-apropos' and
1909 `customize-apropos-options' (i.e., the prefix argument does nothing for
1910 these commands now).
1914 *** The variables `term-default-fg-color' and `term-default-bg-color'
1915 are now deprecated in favor of the customizable face `term'.
1917 *** You can customize how to display ANSI terminal colors and styles
1918 by customizing the corresponding `term-color-<COLOR>',
1919 `term-color-underline' and `term-color-bold' faces.
1923 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1925 *** Remote processes are now also supported on remote MS-Windows hosts.
1929 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1930 Previously, this slot stored semicolon-separated attribute-value pairs
1931 appended to some imap URLs, but this is not compatible with RFC 3986.
1932 So now the `filename' slot stores the entire path and query components,
1933 and the `attributes' slot is always nil.
1935 *** New function `url-encode-url' for encoding a URI string.
1936 The `url-retrieve' function now uses this to encode its URL argument,
1937 in case that is not properly encoded.
1939 ** notifications.el supports now version 1.2 of the Notifications API.
1940 The function `notifications-get-capabilities' returns the supported
1943 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1944 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1945 `flymake-warning-bitmap'.
1947 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1948 specifying URL types that should be converted to remote file names at
1949 the FFAP prompt. The default is now '("ftp").
1951 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1952 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1954 ** New option `mouse-avoidance-banish-position' specifies where the
1955 `banish' mouse avoidance setting moves the mouse.
1957 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1958 closing brackets to be aligned with the line of the opening bracket.
1960 ** In Proced mode, new command `proced-renice' renices marked processes.
1962 ** New option `async-shell-command-buffer' specifies the buffer to use
1963 for a new asynchronous `shell-command' when the default output buffer
1964 `*Async Shell Command*' is already in use.
1966 ** SQL mode has a new option `sql-db2-escape-newlines'.
1967 If non-nil, newlines sent to the command interpreter will be escaped
1968 by a backslash. The default does not escape the newlines and assumes
1969 that the sql statement will be terminated by a semicolon.
1971 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1972 (and modes that derive from it), sorts the column at point, or the Nth
1973 column if a numeric prefix argument is given.
1975 ** `which-func-modes' now defaults to t, so Which Function mode, when
1976 enabled, applies to all applicable major modes.
1978 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1981 ** Follow mode no longer works by using advice.
1982 The option `follow-intercept-processes' has been removed.
1984 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1986 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1987 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1988 *** semantic-change-hooks -> semantic-change-functions
1989 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1990 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1991 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1992 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1993 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1994 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1995 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1996 *** rcirc-activity-hooks -> rcirc-activity-functions
1997 *** rcirc-print-hooks -> rcirc-print-functions
1998 *** dbus-event-error-hooks -> dbus-event-error-functions
1999 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2000 *** checkdoc-style-hooks -> checkdoc-style-functions
2001 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2002 *** archive-extract-hooks -> archive-extract-hook
2003 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2004 *** hfy-post-html-hooks -> hfy-post-html-hook
2005 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2006 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2007 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2008 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2010 ** Obsolete packages
2013 In most cases, assoc+member+push+delq work just as well.
2014 And in any case it's just a terrible package: ugly semantics, terrible
2015 inefficiency, and not namespace-clean.
2024 * Incompatible Lisp Changes in Emacs 24.3
2026 ** Docstrings starting with `*' no longer indicate user options.
2027 Only variables defined using `defcustom' are considered user options.
2028 The function `user-variable-p' is now an obsolete alias for
2029 `custom-variable-p'.
2031 ** The return values of `defalias', `defun' and `defmacro' have changed,
2032 and are now undefined. For backwards compatibility, `defun' and
2033 `defmacro' currently return the name of the newly defined
2034 function/macro, but this should not be relied upon.
2036 ** `random' by default now returns a different random sequence in
2037 every Emacs run. Use `(random S)', where S is a string, to set the
2038 random seed to a value based on S, in order to get a repeatable
2039 sequence in later calls.
2041 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2042 that substring is inserted literally even if the LITERAL arg is
2043 non-nil, instead of causing an error to be signaled.
2045 ** `select-window' now always makes the window's buffer current.
2046 It does so even if the window was selected before.
2048 ** The function `x-select-font' can return a font spec, instead of a
2049 font name as a string. Whether it returns a font spec or a font name
2050 depends on the graphical library.
2052 ** `face-spec-set' no longer sets frame-specific attributes when the
2053 third argument is a frame (that usage was obsolete since Emacs 22.2).
2055 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2057 ** The CL package's `get-setf-method' function no longer exists.
2058 Generalized variables are now part of core Emacs Lisp, and implemented
2059 differently to the way cl.el used to do it. It is not possible to
2060 define a compatible replacement for `get-setf-method'. See the file
2061 gv.el for internal details of the new implementation.
2063 ** The arguments of `dbus-register-signal' are no longer just strings,
2064 but keywords or keyword-string pairs. The old argument list will
2065 still be supported for Emacs 24.x.
2067 ** Miscellaneous name changes
2068 Some Lisp symbols have been renamed to correct their spelling,
2069 or to be more consistent with standard Emacs terminology.
2071 *** Renamed functions
2072 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2073 **** inactivate-input-method -> deactivate-input-method
2074 **** quail-inactivate -> quail-deactivate
2075 **** robin-inactivate -> robin-deactivate
2076 **** viper-inactivate-input-method -> viper-deactivate-input-method
2077 **** viper-inactivate-input-method-action ->
2078 viper-deactivate-input-method-action
2079 **** ucs-input-inactivate -> ucs-input-deactivate
2082 The old hooks are still supported for backward compatibility, but they
2083 are deprecated and will be removed eventually.
2084 **** input-method-inactivate-hook -> input-method-deactivate-hook
2085 **** robin-inactivate-hook -> robin-deactivate-hook
2086 **** quail-inactivate-hook -> quail-deactivate-hook
2088 *** Renamed variables
2089 **** follow-deactive-menu -> follow-inactive-menu
2090 **** inactivate-current-input-method-function ->
2091 deactivate-current-input-method-function
2093 ** Some obsolete functions, variables, and faces have been removed:
2094 *** `last-input-char', `last-command-char', `unread-command-char'
2095 *** `facemenu-unlisted-faces'
2096 *** `rmail-decode-mime-charset'
2097 *** `iswitchb-read-buffer'
2098 *** `sc-version', `sc-submit-bug-report'
2099 *** `set-char-table-default'
2100 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2101 *** `compile-internal'
2103 *** `mode-line-inverse-video'
2104 *** `follow-mode-off-hook'
2105 *** `cvs-commit-buffer-require-final-newline'
2106 (use `log-edit-require-final-newline' instead)
2107 *** `cvs-changelog-full-paragraphs'
2108 (use `log-edit-changelog-full-paragraphs' instead)
2109 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2110 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2111 *** `vc-master-templates' (use `vc-handled-backends' instead)
2112 *** `vc-checkout-carefully'
2115 * Lisp Changes in Emacs 24.3
2117 ** CL-style generalized variables are now in core Elisp.
2118 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2119 You can define your own generalized variables using `gv-define-simple-setter',
2120 `gv-define-setter', etc.
2122 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2123 This can significantly speed up execution of non-byte-compiled code,
2124 but can also bump into previously unnoticed cyclic dependencies.
2125 These are generally harmless: they will simply cause the macro calls
2126 to be left for later expansion (as before), but will result in a
2127 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2128 You may wish to restructure your code so this does not happen.
2130 ** New sampling-based Elisp profiler.
2131 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2132 When finished, use M-x profiler-stop. The sampling rate can be based on
2133 CPU time or memory allocations.
2135 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2136 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2138 ** New macros `setq-local' and `defvar-local'.
2140 ** Face underlining can now use a wave.
2142 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2143 of `read-regexp' accepts a string ending with a colon and space, and its
2144 second argument DEFAULTS can be a list of strings accessible via `M-n'
2145 in the minibuffer ahead of other hard-coded useful regexp-related values.
2146 More commands use `read-regexp' now to read their regexp arguments.
2150 *** New function `completion-table-with-quoting' to handle completion
2151 in the presence of quoting, such as file completion in shell buffers.
2153 *** New function `completion-table-subvert' to use an existing completion
2154 table, but with a different prefix.
2158 *** New error type and new function `user-error'.
2159 These do not trigger the debugger.
2161 *** New option `debugger-bury-or-kill', saying what to do with the
2162 debugger buffer when exiting debug.
2164 *** Set `debug-on-message' to enter the debugger when a certain
2165 message is displayed in the echo area. This can be useful when trying
2166 to work out which code is doing something.
2168 *** New var `inhibit-debugger', automatically set to prevent accidental
2169 recursive invocations.
2173 *** New command `fit-frame-to-buffer' adjusts the frame height to
2176 *** The command `fit-window-to-buffer' can adjust the frame height
2177 if the new option `fit-frame-to-buffer' is non-nil.
2179 *** New macro `with-temp-buffer-window', similar to
2180 `with-output-to-temp-buffer'.
2182 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2185 *** New option `switch-to-buffer-preserve-window-point' to restore a
2186 window's point when switching buffers.
2188 *** New display action alist entries `window-height' and `window-width'
2189 specify the size of new windows created by `display-buffer'.
2191 *** New display action alist entry `pop-up-frame-parameters', if
2192 non-nil, specifies frame parameters to give any newly-created frame.
2194 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2195 tells display action functions to avoid changing which frame is
2198 *** New display action alist entry `previous-window', if non-nil,
2199 specifies window to reuse in `display-buffer-in-previous-window'.
2201 *** New display action functions `display-buffer-below-selected',
2202 and `display-buffer-in-previous-window'.
2204 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2205 now accept a third argument to avoid choosing the selected window.
2207 *** Additional values recognized for option `window-combination-limit'.
2209 *** The following variables are obsolete, as they can be replaced by
2210 appropriate entries in the `display-buffer-alist' function introduced
2212 **** `dired-shrink-to-fit'
2213 **** `display-buffer-reuse-frames'
2214 **** `display-buffer-function'
2215 **** `special-display-buffer-names'
2216 **** `special-display-frame-alist'
2217 **** `special-display-function'
2218 **** `special-display-regexps'
2222 *** `current-time-string' no longer requires that its argument's year
2223 must be in the range 1000..9999. It now works with any year supported
2224 by the underlying C implementation.
2226 *** `current-time' now returns extended-format time stamps
2227 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2228 PSEC is typically a multiple of 1000 on current machines. Other
2229 functions that use this format, such as `file-attributes' and
2230 `format-time-string', have been changed accordingly. Old-format time
2231 stamps are still accepted.
2233 *** The format of timers in `timer-list' and `timer-idle-list' is now
2234 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2235 The PSECS slot is new, and uses picosecond resolution. It can be
2236 accessed via the new `timer--psecs' accessor.
2238 *** Last-modified time stamps in undo lists now are of the form
2239 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2243 *** Improved security when handling persistent objects:
2245 **** `eieio-persistent-read' now features optional arguments for specifying
2246 the class to load, as well as a flag stating whether subclasses are allowed;
2247 if provided, other classes will be rejected by the reader. For
2248 compatibility with existing code, if the class is omitted only a
2251 **** New specialized reader for pulling in classes and signaling errors
2252 without evaluation of suspicious code.
2254 **** All slots that contain objects must have a :type. Slots with lists
2255 of objects must use a new type predicate for a list of an object type.
2257 *** Support for `find-function' and similar utilities, through the addition
2258 of filename support to generated symbols.
2260 ** Floating point functions now always return special values like NaN,
2261 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2262 Previously, they returned NaNs on some platforms but signaled errors
2263 on others. The affected functions are acos, asin, tan, exp, expt,
2264 log, log10, sqrt, and mod.
2266 ** New fringe bitmap `exclamation-mark'.
2268 ** Miscellaneous changes to special forms and macros
2270 *** `defun' and `defmacro' are now macros rather than special forms.
2272 *** `kbd' is now a function rather than a macro.
2274 ** Miscellaneous new functions
2276 *** `set-temporary-overlay-map' sets up a temporary keymap that
2277 takes precedence over most other maps for a short while (normally one key).
2279 *** `autoloadp' tests if its argument is an autoloaded object.
2281 *** `autoload-do-load' performs the autoloading operation.
2283 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2285 *** `file-name-base' returns a file name sans directory and extension.
2287 *** `function-get' fetches a function property, following aliases.
2289 *** `posnp' tests if an object is a `posn'.
2291 *** `system-users' returns the user names on the system.
2293 *** `system-groups' returns the group names on the system.
2295 *** `tty-top-frame' returns the topmost frame of a text terminal.
2297 ** The following functions and variables are obsolete:
2298 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2299 *** `buffer-has-markers-at'
2300 *** `macro-declaration-function' (use `macro-declarations-alist')
2301 *** `window-system-version' (provides no useful information)
2302 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2303 *** `query-replace-interactive'
2304 *** `font-list-limit' (has had no effect since Emacs < 23)
2307 * Changes in Emacs 24.3 on Non-Free Operating Systems
2309 ** Cygwin builds can use the native MS Windows user interface.
2310 Pass `--with-w32' to configure. The default remains the X11 interface.
2312 ** Two new functions are available in Cygwin builds:
2313 `cygwin-convert-file-name-from-windows' and
2314 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2315 code to access the Cygwin file-name mapping machinery to convert
2316 between Cygwin and Windows-native file and directory names.
2318 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2319 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2320 `mouse-autoselect-window'.
2322 ** On MS Windows Vista and later Emacs now supports symbolic links.
2324 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2325 support for libxml2, even if its presence is detected.
2327 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2329 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2330 directories to the search path. You must add them yourself if you want them.
2333 * Changes in Emacs 24.2
2335 ** This is mainly a bug-fix release.
2338 * Installation Changes in Emacs 24.1
2340 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2341 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2342 also depend on Gtk+. You can disable them with --without-rsvg and
2345 ** Emacs can be compiled with GnuTLS support.
2346 This happens by default if a suitably recent version of the library is
2347 found at build time. To prevent this, use the configure option
2348 `--without-gnutls'. See below for GnuTLS features.
2350 ** Emacs can be compiled with SELinux support.
2351 This happens by default if a suitably recent version of the library is
2352 found at build time. To prevent this, use the configure option
2353 `--without-selinux'. See below for SELinux features.
2355 ** Emacs can be compiled with ImageMagick support.
2356 This happens by default if a suitably recent version of the library is
2357 found at build time. To prevent this, use the configure option
2358 `--without-imagemagick'. See below for ImageMagick features.
2359 This feature is not available for the Nextstep or MS ports.
2361 ** Emacs can be compiled with libxml2 support.
2362 This happens by default if a suitably recent version of the library is
2363 found at build time. To prevent this, use the configure option
2364 `--without-xml2'. See below for libxml2 features.
2366 ** By default, the installed Info and man pages are compressed.
2367 You can disable this by configuring --without-compress-info.
2369 ** New configure option --with-wide-int.
2370 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2371 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2374 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2375 These provide no new functionality, they just remove the need to edit
2376 lib-src/Makefile by hand in order to use the associated features.
2378 ** New configure option --enable-use-lisp-union-type.
2379 This is only useful for Emacs developers to debug certain types of bugs.
2380 This is not a new feature; only the configure flag is new.
2382 ** The standalone programs digest-doc and sorted-doc are removed.
2383 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2385 ** The standalone program `fakemail' is removed.
2386 If you need it, feedmail.el provides a superset of the functionality.
2389 * Startup Changes in Emacs 24.1
2391 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2392 command line arguments, and the EMACS_UNIBYTE environment variable, no
2393 longer have any effect. (They were declared obsolete in Emacs 23.)
2395 ** New command line option `--no-site-lisp' removes site-lisp directories
2396 from load-path. -Q now implies this. This option does not affect the
2397 EMACSLOADPATH environment variable (and hence has no effect for
2401 * Changes in Emacs 24.1
2405 *** Many packages now use the `completion-at-point' command,
2406 rather than implementing separate completion commands.
2408 *** `completion-at-point' now handles tags and semantic completion.
2410 *** Completion in a non-minibuffer now tries to detect the end of completion
2411 and pops down the *Completions* buffer accordingly.
2413 *** New option `completion-cycle-threshold' allows completion cycling.
2415 *** New option `completion-category-overrides' for overriding the
2416 default completion style in certain circumstances.
2418 *** New completion style `substring'.
2420 *** Completion of buffer names uses `substring' completion by default.
2422 *** The option `widget-complete-field' has been removed.
2426 *** The first time you try sending mail, Emacs asks for a mail method.
2427 This is implemented by a new default for `send-mail-function', which
2428 is `sendmail-query-once'. This offers to use the smtpmail package, or
2429 to use the old defaults relying on external mail facilities
2430 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2431 `mailclient-send-it' on Windows).
2433 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2434 transfers the report to your desktop's preferred mail client, if there
2435 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2438 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2439 and Mail mode changes
2441 ** Emacs server and client changes
2443 *** New option `server-port' specifies the port for TCP Emacs servers.
2445 *** New emacsclient argument -q/--quiet suppresses some status messages.
2447 *** New emacsclient argument --frame-parameters specifies the frame
2448 parameters of any newly-created graphical frame.
2450 *** If emacsclient shuts down due to Emacs signaling an error,
2451 its exit status is 1.
2453 *** New emacsclient argument --parent-id ID.
2454 This opens a client frame in parent X window ID, via XEmbed, similar
2455 to the --parent-id argument to Emacs.
2457 ** Internationalization changes
2459 *** Emacs now supports display and editing of bidirectional text.
2460 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2461 displayed in the correct visual order as expected by users of those
2462 scripts. The display reordering is a "full bidirectionality" class
2463 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2464 with no RTL text should look exactly the same as before.
2466 **** New buffer-local variable `bidi-display-reordering'.
2467 To disable display reordering in a buffer, change this to nil.
2469 **** New buffer-local variable `bidi-paragraph-direction'.
2470 If nil (the default), Emacs determines the base direction of each
2471 paragraph from its text, as specified by the UBA. Setting the value
2472 to `right-to-left' or `left-to-right' forces a base direction on each
2475 Paragraphs with right-to-left base direction are displayed starting at
2476 the right window edge.
2478 *** Enhanced support for characters with no glyphs in available fonts,
2479 or, on text terminals, characters that cannot be encoded by the
2480 terminal coding system. The new option `glyphless-char-display-control'
2481 specifies how to display them: as a hexadecimal code in a box, a thin
2482 1-pixel space, an empty box, etc.
2484 *** New input methods for Farsi and Bulgarian
2485 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2487 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2488 (U+2010 and U+2011).
2490 *** New Hebrew translation of the Emacs Tutorial.
2491 Type `C-u C-h t' to choose it in case your language setup doesn't
2492 automatically select it.
2494 ** An Emacs Lisp package manager is now included.
2495 This is a convenient way to download and install additional packages,
2496 from a package repository at http://elpa.gnu.org.
2498 *** M-x list-packages shows a list of packages, which can be
2499 selected for installation.
2501 *** New command `describe-package', bound to `C-h P'.
2503 *** By default, all installed packages are loaded automatically when
2504 Emacs starts up. To disable this, set `package-enable-at-startup' to
2505 nil. To specify the packages to load, customize `package-load-list'.
2507 ** Custom theme changes
2509 *** New command `M-x customize-themes', which provides a convenient
2510 interface for enabling and disabling Custom themes.
2512 *** New option `custom-theme-load-path' is the load path for themes.
2513 Emacs no longer looks for Custom themes in `load-path'. The default
2514 value of `custom-theme-load-path' says to look for themes in
2515 `custom-theme-directory', followed by a subdirectory of
2516 `data-directory' named "themes/", which contains a small selection of
2517 built-in Custom themes.
2519 *** New option `custom-safe-themes' records known-safe theme files.
2520 If a theme is not in this list, Emacs queries before loading it, and
2521 offers to save the theme to `custom-safe-themes' automatically. By
2522 default, all themes included in Emacs are treated as safe.
2524 ** Improved GTK integration
2526 *** GTK scroll-bars are now placed on the right by default.
2527 The function `set-scroll-bar-mode' can change this.
2529 *** GTK tool bars can have just text, just images or images and text.
2530 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2531 the default is taken from desktop settings.
2533 *** GTK tool bars can be placed on any edge of the frame.
2534 The frame-parameter tool-bar-position controls this. It takes the
2535 values top, left, right or bottom. The Options => Show/Hide menu has
2538 *** The default colors for selected text (the `region' face) are taken
2539 from the GTK theme when Emacs is built with GTK.
2541 *** Emacs uses GTK tooltips by default if built with GTK.
2542 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2544 ** Graphical interface changes
2546 *** On graphical displays, the mode-line no longer ends in dashes.
2547 Also, the first dash (which does not indicate anything) is just
2548 displayed as a space.
2550 *** `menu-bar-select-buffer-function' lets you choose another operation
2551 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2553 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2554 built with Xft. These fonts can be set via X resources, for example:
2555 Emacs.pane.menubar.font: Courier-12
2559 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2560 or if it receives a SIGINT signal in batch mode.
2562 *** `kill-emacs-hook' is now also run in batch mode.
2563 Third-party code which adds to `kill-emacs-hook' should check if they
2564 do the right thing in batch mode.
2566 ** Scrolling changes
2568 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2569 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2570 of buffer at first key-press (instead they move to top/bottom of buffer)
2571 when `scroll-error-top-bottom' is non-nil.
2573 *** New option `scroll-error-top-bottom' (see above).
2575 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2576 scroll a line instead of full screen.
2578 *** New property `scroll-command' should be set on a command's symbol to
2579 define it as a scroll command affected by `scroll-preserve-screen-position'.
2581 *** If you customize `scroll-conservatively' to a value greater than 100,
2582 Emacs will never recenter point in the window when it scrolls due to
2583 cursor motion commands or commands that move point (e.f., `M-g M-g').
2584 Previously, you needed to use `most-positive-fixnum' as the value of
2585 `scroll-conservatively' to achieve the same effect.
2587 *** "Aggressive" scrolling now honors the scroll margins.
2588 If you customize `scroll-up-aggressively' or
2589 `scroll-down-aggressively' and move point off the window, Emacs now
2590 scrolls the window so as to avoid positioning point inside the scroll
2593 ** Basic SELinux support has been added.
2594 This requires Emacs to be linked with libselinux at build time.
2596 *** Emacs preserves the SELinux file context when backing up.
2597 Also, the function `copy-file' has an extra optional argument for
2598 preserving SELinux context, and the return value of `backup-buffer'
2599 now includes the SELinux context.
2601 *** New functions `file-selinux-context' and `set-file-selinux-context'
2602 get and set the SELinux context of a file.
2606 *** `delete-by-moving-to-trash' now only affects commands that specify
2607 trashing. This avoids inadvertently trashing temporary files.
2609 *** Calling `delete-file' or `delete-directory' with a prefix argument
2610 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2612 ** File- and directory-local variable changes
2614 *** You can stop directory local vars from applying to subdirectories.
2615 Add an element (subdirs . nil) to the alist portion of any variables
2616 settings to indicate that the section should not apply to
2619 *** Directory local variables can apply to some file-less buffers.
2620 Affected modes include dired, vc-dir, and log-edit. For example,
2621 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2622 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2623 `hack-dir-local-variables-non-file-buffer' to support this.
2625 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2626 Instead, use "eval: (minor-mode 1)".
2628 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2629 to `inhibit-local-variables-regexps'. As the name suggests, it now
2630 applies to ALL file local variables, not just -*- lines. The
2631 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2636 *** The `quit-window' command now restores the last buffer displayed
2637 in the quitted window.
2639 *** Resizing an Emacs frame now preserves proportional window sizes,
2640 modulo restrictions like window minimum sizes and fixed-size windows.
2642 *** The behavior of `display-buffer' is now customizable in detail.
2644 **** New option `display-buffer-base-action' specifies a list of
2645 user-determined display "actions" (functions and optional arguments
2646 for choosing the displaying window).
2648 This takes precedence over the default display action, which is
2649 specified by `display-buffer-fallback-action'.
2651 **** New option `display-buffer-alist' maps buffer name regexps to
2652 display actions, taking precedence over `display-buffer-base-action'.
2654 *** New option `window-combination-limit'.
2655 The new option `window-combination-limit' allows to return the space
2656 obtained for resizing or creating a window more reliably to the window
2657 from which such space was obtained.
2659 *** New option `window-combination-resize'.
2660 The new option `window-combination-resize' allows to split a window that
2661 otherwise cannot be split because it's too small by stealing space from
2662 other windows in the same combination. Subsequent resizing or deletion
2663 of the window will resize all windows in the same combination as well.
2665 *** New option `frame-auto-hide-function' lets you choose between
2666 iconifying or deleting a frame when burying a buffer in a dedicated
2667 frame, or quitting a window showing a buffer in a frame of its own.
2669 *** New commands `maximize-window' and `minimize-window'.
2670 These maximize and minimize the size of a window within its frame.
2672 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2673 These functions allow to navigate through the live buffers that have
2674 been shown in a specific window.
2676 ** Minibuffer changes
2678 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2679 This is handy for minibuffer-only frames, and is also used for the feature
2680 where mouse-1 pops up *Messages*"', which can now easily be changed.
2682 *** Minibuffers set `truncate-lines' to nil.
2683 If you want to change the value to something else, you could use
2684 for example `minibuffer-setup-hook'.
2686 ** `auto-mode-case-fold' is now enabled by default.
2688 ** `backup-by-copying-when-mismatch' now defaults to t.
2690 ** New basic faces `error', `warning', `success'.
2691 These are used to highlight text indicating failure, caution or
2692 successful operation.
2694 ** New option `list-colors-sort' defines the color sort order
2695 for `list-colors-display'.
2697 ** The variable `focus-follows-mouse' now always defaults to nil.
2700 * Editing Changes in Emacs 24.1
2704 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2705 `isearch-yank-line'.
2707 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2708 `isearch-yank-kill'.
2710 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2712 ** New commands `count-words-region' and `count-words'.
2714 *** M-= is bound to `count-words-region', not `count-lines-region'.
2715 The `count-words-region' command, when called interactively, reports
2716 the number of lines, words, and characters in the region. It is a
2717 superset of the old `count-lines-region', which is now an obsolete
2720 ** The command `just-one-space' (M-SPC), if given a negative argument,
2721 also deletes newlines around point.
2725 *** New option `delete-active-region'.
2726 If non-nil, [delete] and DEL delete the region if it is active and no
2727 prefix argument is given. If set to `kill', those commands kill
2730 *** New command `delete-forward-char', bound to [delete].
2731 This is meant for interactive use, and obeys `delete-active-region'.
2732 The command `delete-char' does not obey `delete-active-region'.
2734 *** `delete-backward-char' is now a Lisp function.
2735 Apart from obeying `delete-active-region', its behavior is unchanged.
2736 However, the byte compiler now warns if it is called from Lisp; Lisp
2737 callers should use delete-char with a negative argument instead.
2739 *** The option `mouse-region-delete-keys' has been deleted.
2741 ** Selection changes.
2743 The default handling of clipboard and primary selections has been
2744 changed to conform with modern X applications. In short, most
2745 commands for killing and yanking text now use the clipboard, while
2746 mouse commands use the primary selection.
2748 In the following, we provide a list of these changes, followed by a
2749 list of steps to get the old behavior back if you prefer that.
2751 *** `select-active-regions' now defaults to t.
2752 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2753 the kill ring. The selected text is put in the primary selection, if
2754 the system possesses a separate primary selection facility (e.g. X).
2756 **** `select-active-regions' also accepts a new value, `only'.
2757 This means to only set the primary selection for temporarily active
2758 regions (usually made by mouse-dragging or shift-selection);
2759 "ordinary" active regions, such as those made with C-SPC followed by
2760 point motion, do not alter the primary selection.
2762 **** `mouse-drag-copy-region' now defaults to nil.
2764 *** mouse-2 is now bound to `mouse-yank-primary'.
2765 This pastes from the primary selection, ignoring the kill-ring.
2766 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2768 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2770 *** `x-select-enable-primary' now defaults to nil.
2771 Thus, commands that kill text or copy it to the kill-ring (such as
2772 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2774 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2775 exactly equivalent to M-w, C-w, and C-y respectively.
2777 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2778 non-nil by default, as Windows does not support the primary selection
2779 between applications.
2781 *** To return to the previous behavior, do the following:
2783 **** Change `select-active-regions' to nil.
2784 **** Change `mouse-drag-copy-region' to t.
2785 **** Change `x-select-enable-primary' to t (on X only).
2786 **** Change `x-select-enable-clipboard' to nil.
2787 **** Bind `mouse-yank-at-click' to mouse-2.
2789 *** Support for X cut buffers has been removed.
2791 *** X clipboard managers are now supported.
2792 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2794 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2795 in the current rectangle. With a prefix argument, this prompts for a
2796 number to count from and for a format string.
2798 ** `redisplay-dont-pause' now defaults to t.
2799 This makes Emacs feel more responsive to editing commands that arrive
2800 at high rate, e.g. if you lean on some key, because stopping redisplay
2801 in the middle (when this variable is nil) forces more expensive
2802 updates later on, and Emacs appears to be unable to keep up.
2804 ** The behavior of <TAB> for active regions in Text mode has changed.
2805 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2806 when the region is active causes Emacs to indent all the lines in the
2807 region, aligning them with the line previous to the first line in the
2808 region (or with the left margin if there is no previous line).
2810 ** When `occur' is called with a prefix argument, matching strings are
2811 collected into the `*Occur*' buffer without line numbers. If there
2812 are parenthesized subexpressions in the specified regexp, `occur'
2813 reads replacement text that may contain \\& and \\N whose convention
2814 follows `replace-match'.
2817 * Changes in Specialized Modes and Packages in Emacs 24.1
2819 ** Archive Mode has basic support for browsing and updating 7z archives.
2823 *** BibTeX mode now supports biblatex.
2824 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2825 `bibtex-entry-field-alist' is now an obsolete alias for
2826 `bibtex-BibTeX-entry-alist'.
2828 *** New command `bibtex-search-entries', bound to C-c C-a.
2830 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2832 *** New variable `bibtex-search-entry-globally'.
2836 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2838 *** The default browser used by the package is now the "xdg-open" program,
2839 on platforms that support it. This calls your desktop's preferred browser.
2843 *** Support for musical notes.
2845 *** Support for logarithmic units.
2847 *** No longer uses the tex prefix for TeX specific unit names when
2848 using TeX or LaTeX mode.
2850 *** New option to highlight selections using faces.
2852 *** `calc-histogram' has the option of using a vector to determine the bins.
2854 *** New "O" option prefix.
2856 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2858 ** Calendar, Diary, and Appt
2860 *** Diary entries can contain non-printing "comments".
2861 See the variable `diary-comment-start'.
2863 *** Appointments can specify their individual warning times.
2864 See the variable `appt-warning-time-regexp'.
2866 *** The function specified by `appt-disp-window-function' may be passed
2867 lists of arguments if multiple appointments are due at similar times.
2868 If you are using a custom function for this, you should update it.
2870 *** New function `diary-hebrew-birthday'.
2872 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2873 may no longer be nil, but must all be strings.
2875 *** The obsolete (since Emacs 22.1) method of enabling the appt
2876 package by adding `appt-make-list' to `diary-hook' has been removed.
2877 Use `appt-activate' instead.
2879 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2880 appt-issue-message (use the function appt-activate)
2881 appt-visible/appt-msg-window (use the variable appt-display-format)
2883 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2884 view-diary-entries, list-diary-entries, show-all-diary-entries
2888 *** New feature to "guess" the style in an existing buffer.
2889 The main entry point is M-x c-guess.
2891 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2893 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2894 Thus C-M-a will, by default, go to the beginning of the immediate function,
2897 *** "Macros with semicolons" can be registered for correct indentation.
2898 Where such a macro ends a line (no semicolon) the next statement is no longer
2899 parsed as a statement continuation.
2901 ** Comint and modes derived from it use the standard completion code.
2905 *** Compilation mode can be used without Font Lock mode.
2906 `compilation-parse-errors-function' is now obsolete.
2908 *** New variable `compilation-filter-start', which is bound while
2909 `compilation-filter-hook' runs. It records the start position of the
2910 text inserted by `compilation-filter'.
2912 *** `compilation-error-screen-columns' and `compilation-first-column'
2913 are obeyed in the editing buffer. So programming language modes can
2914 set them, whereas previously only the value in the *Compilation*
2919 *** Customize buffers now contain a search field.
2920 The search is performed using `customize-apropos'.
2921 To turn off the search field, set `custom-search-field' to nil.
2923 *** Options in customize group buffers start out hidden if not customized.
2924 Use the arrow to the left of the option name to toggle visibility.
2926 *** custom-buffer-sort-alphabetically now defaults to t.
2928 *** The color widget now has a "Choose" button, which allows you to
2929 choose a color via `list-colors-display'.
2933 *** It is now possible to access buses other than the default system
2936 *** The `dbus-register-method' and `dbus-register-property' functions
2937 optionally do not register names.
2939 *** The new function `dbus-register-service' registers a known service
2940 name on a D-Bus without also registering a property or a method.
2944 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2945 if called with a prefix argument, read a file name from the minibuffer
2946 instead of using the current buffer.
2948 *** The "dired local variables" feature of Dired-x is obsolete.
2949 The standard directory local variables feature replaces it.
2953 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2954 controlling attempts to autojoin a channel.
2956 *** New variable `erc-coding-system-precedence': If we use `undecided'
2957 as the server coding system, this variable will then be consulted.
2958 The default is to decode strings that can be decoded as utf-8 as
2959 utf-8, and do the normal `undecided' decoding for the rest.
2963 *** The default value of `eshell-directory-name' has changed
2964 to be an "eshell" directory in `user-emacs-directory'.
2965 The old "~/.eshell/" directory is still used if it exists, though.
2969 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2970 It now supports multithread non-stop debugging and simultaneous
2971 debugging of several threads.
2975 *** RET (`image-toggle-animation') toggles animation, if applicable.
2976 Animation plays once, unless the option `image-animate-loop' is non-nil.
2980 *** New command M-x info-display-manual displays a named Info manual.
2981 If that manual is already visited in some Info buffer, it displays
2982 that buffer. (This is handy if you have many manuals in many *info*
2983 buffers, and don't remember the name of the buffer visiting the manual
2984 you want to consult.) Otherwise, it loads and displays the manual.
2986 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2987 This is for compatibility with the stand-alone Info reader program,
2988 and also because `Info-edit' is a rarely used command that is disabled
2991 ** Mail mode changes (not Message mode)
2993 *** New command M-x mail-add-attachment for adding MIME attachments
2995 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2996 (Its name is misleading, since it has nothing to do with MIME
2997 attachments.) The old name is now an obsolete alias to the new name.
2999 ** MH-E has been updated to MH-E version 8.3.1.
3000 See MH-E-NEWS for details.
3002 ** Modula-2 mode provides auto-indentation.
3004 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3006 ** nXML mode no longer binds C-RET to `nxml-complete'.
3007 Completion is now performed via `completion-at-point', bound to C-M-i
3008 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3009 default), this performs tag completion.
3011 ** Org mode has been updated to version 7.8.09.
3012 See ORG-NEWS for details.
3014 ** Prolog mode has been completely revamped, with lots of additional
3015 functionality such as more intelligent indentation, electricity,
3016 support for more variants, including Mercury, and a lot more.
3020 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3021 in the Rmail incoming message.
3023 *** The variable `rmail-message-filter' no longer has any effect.
3024 This change was made in Emacs 23.1 but was not advertised at the time.
3025 Try using `rmail-show-message-hook' instead.
3029 *** M-x shell prompts for the shell path name if the default directory
3030 is a remote file name and neither the environment variable $ESHELL nor
3031 the variable `explicit-shell-file-name' is set.
3033 *** TAB is now bound to the standard `completion-at-point' command,
3034 which now implements the pcomplete rules for shell command completion.
3038 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3039 if the mail server supports them. This uses either built-in GnuTLS
3040 support, or the starttls.el library. Customize `smtpmail-stream-type'
3043 *** The variable `smtpmail-auth-credentials' has been removed.
3044 By default, the information is now stored in the file ~/.authinfo.
3045 This was the default value of smtpmail-auth-credentials. If you had
3046 customized smtpmail-auth-credentials to a list of user names and
3047 passwords, those settings are not used. During your first connection
3048 to the smtp server, Emacs will prompt for the user name and password,
3049 and offer to save them to ~/.authinfo. Or you can manually copy the
3050 credentials to ~/.authinfo. For example, if you had
3052 (setq smtpmail-auth-credentials
3053 '(("mail.example.org" 25 "jim" "s!cret")))
3055 then the equivalent line in ~/.authinfo would be
3057 machine mail.example.org port 25 login jim password s!cret
3059 See the auth-source manual for more information, e.g. on encrypting
3060 the credentials file.
3062 *** The variable `smtpmail-starttls-credentials' has been removed.
3063 If you had that set, you need to put
3065 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3067 in your ~/.authinfo file instead.
3069 *** SMTPmail defaults to using the address in the From: header as the
3070 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3071 to the address you wish to use instead.
3075 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3076 and `sql-oracle-scan-on'.
3078 *** New options controlling prompting for login parameters.
3079 Each supported product has a custom variable `sql-*-login-params',
3080 which is a list of the parameters to be prompted for before a
3081 connection is established.
3083 *** The command `sql-product-interactive' now takes a prefix argument,
3084 which causes it to prompt for an SQL product.
3086 *** Product-specific SQL interactive commands now take prefix arguments.
3087 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3088 given a prefix argument, prompt for a name for the SQL interactive
3089 buffer. This reduces the need for calling `sql-rename-buffer'.
3091 *** SQL interactive modes suppress command continuation prompts, and
3092 replace tabs with spaces. The first change impacts multiple line SQL
3093 statements entered with C-j between each line, statements yanked into
3094 the buffer and statements sent with `sql-send-*' functions. The
3095 second prevents the MySQL and Postgres interpreters from listing
3096 object name completions when sent text via `sql-send-*' functions.
3098 *** New command `sql-connect' starts a predefined SQLi session,
3099 using the login parameters from `sql-connection-alist'.
3101 *** New "Save Connection" menu item in SQLi buffers.
3102 This gathers the login params specified for the SQLi session, if it
3103 was not started by a connection, and saves them as a new connection.
3105 *** New commands for listing database objects and details:
3106 sql-list-all and sql-list-table.
3108 *** An API for manipulating SQL product definitions has been added.
3112 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3116 *** New inline access method "ksu" (kerberized su).
3118 *** The following access methods are discontinued: "ssh1_old",
3119 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3121 *** The user option `remote-file-name-inhibit-cache' controls whether
3122 remote file attributes are cached for better performance.
3124 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3125 default value to "".
3127 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3128 for remote machines which support SELinux.
3130 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3131 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3132 the degree of parallelism.
3134 ** VC and related modes
3136 *** Support for pulling on distributed version control systems.
3137 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3138 supported (currently with Bzr, Git, and Mercurial), to update the
3139 current branch and working tree. A prefix argument means to prompt
3140 the user for specifics, e.g. a pull location.
3142 *** `vc-update' is now an alias for `vc-pull'.
3144 *** Support for merging on distributed version control systems.
3145 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3146 is supported (currently with Bzr, Git, and Mercurial), to merge
3147 changes from another branch into the current one. It prompts for
3148 specifics, e.g. a merge source.
3150 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3151 shows a diff while querying the user. It defaults to t.
3153 *** Log entries in some Log View buffers can be toggled to display a
3154 longer description by typing RET (log-view-toggle-entry-display).
3155 This is currently supported for Bzr, Git, and Mercurial (to support
3156 another backend, define a `log-view-expanded-log-entry-function').
3157 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3158 use this to display the full log entry for the revision at point.
3160 *** New command `vc-ediff' allows visual comparison of two revisions
3161 of a file similar to `vc-diff', but using ediff backend.
3163 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3164 this was not advertised at the time.
3166 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3167 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3168 this was not advertised at the time.
3174 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3176 *** partial-completion-mode (complete.el) is obsolete.
3177 You can get a comparable behavior with:
3178 (setq completion-styles '(partial-completion initials))
3179 (setq completion-pcm-complete-word-inserts-delimiters t)
3181 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3183 *** pgg is obsolete (use EasyPG instead).
3185 *** sregex.el is obsolete, since rx.el is a strict superset.
3187 *** s-region.el and pc-select.el are obsolete.
3188 They are superseded by shift-select-mode, enabled by default since 23.1.
3190 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3194 *** The Landmark game is now invoked with `landmark', not `lm'.
3195 Its functions and variables have been similarly renamed.
3197 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3198 (This interfered with cua-mode.)
3200 *** f90.el has some support for Fortran 2008 syntax.
3202 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3204 *** New command `nato-region' converts text to NATO phonetic alphabet.
3207 * New Modes and Packages in Emacs 24.1
3209 ** Occur Edit mode applies edits made in *Occur* buffers to the
3210 original buffers. It is bound to "e" in Occur mode.
3212 ** New global minor mode electric-pair-mode.
3213 When enabled, typing an open parenthesis automatically inserts the
3214 matching closing one.
3216 ** New global minor mode electric-indent-mode.
3217 When enabled, typing certain characters triggers reindentation.
3218 Major modes wishing to use this can set electric-indent-chars or
3219 electric-indent-functions.
3221 ** New global minor mode electric-layout-mode.
3222 When enabled, typing certain characters automatically inserts newlines.
3223 Major modes wishing to use this can set electric-layout-rules.
3225 ** tabulated-list.el provides a generic major mode for tabulated data,
3226 from which other modes can be derived.
3228 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3230 ** secrets.el is an implementation of the Secret Service API, an
3231 interface to password managers like GNOME Keyring or KDE Wallet. The
3232 Secret Service API requires D-Bus for communication. The command
3233 `secrets-show-secrets' offers a buffer with a visualization of the
3236 ** notifications.el provides an implementation of the Desktop
3237 Notifications API. It requires D-Bus for communication.
3239 ** soap-client.el supports access to SOAP web services from Emacs.
3240 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3242 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3244 ** New emacs-lock.el package.
3245 The previous version has been moved to obsolete/old-emacs-lock.el.
3246 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3247 against exiting Emacs and killing the buffer can be set separately.
3248 The mechanism for automatically turning off protection for buffers
3249 with dead inferior processes has been generalized.
3252 * Incompatible Lisp Changes in Emacs 24.1
3254 ** Passing a nil argument to a minor mode function call now ENABLES
3255 the minor mode unconditionally. This is so that you can write e.g.
3257 (add-hook 'text-mode-hook 'foo-mode)
3259 to enable foo-mode in Text mode buffers, removing the need for
3260 `turn-on-foo-mode' style functions. This affects all mode commands
3261 defined by `define-minor-mode'. If called interactively, the mode
3262 command still toggles the minor mode.
3264 ** The return value of `backup-buffer' has changed.
3265 It is now a list of three elements, where the second element is a list
3266 describing the original file's SELinux context. If Emacs or the
3267 system lacks SELinux support, the context list is (nil nil nil nil).
3268 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3270 ** `char-direction-table' and the `char-direction' function were deleted.
3271 They were buggy and inferior to the new support of bidirectional
3272 editing introduced in Emacs 24. If you need the bidirectional
3273 properties of a character, use `get-char-code-property' with the last
3274 argument `bidi-class'.
3276 ** `copy-directory' now copies the source directory as a subdirectory
3277 of the target directory, if the latter is an existing directory. The
3278 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3279 the contents directly into a pre-existing target directory.
3281 ** For mouse click input events in the text area, the Y pixel
3282 coordinate in the POSITION list now counts from the top of the text
3283 area, excluding any header line. Previously, it counted from the top
3286 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3287 been further reduced. Now a backquote not followed by a space is
3288 always treated as a "new-style" backquote. Please remove all
3289 "old-style" backquotes from your code. If your code uses backquotes
3290 as documented in the Elisp manual, and compiles without warning, then
3291 you have nothing to do in this regard. Code not following the
3292 appropriate conventions may fail to compile.
3294 The most common cause of trouble seems to be an old-style backquote
3295 followed by a newline. Another cause of trouble is vector notation
3296 for key sequence notation: instead of [(control ,)] and [(control ')],
3297 you should write [(control ?,)] and [(control ?')], which will work in
3300 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3301 was not advertised at the time. The function `custom-initialize-delay'
3302 replaced all known uses.
3304 ** `view-buffer' now treats special mode-class in the same way that
3305 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3306 major mode is special).
3308 ** Menu and tool bar changes
3310 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3311 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3312 With these alist entries omitted, `make-frame' checks the value of the
3313 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3314 a menu-bar or tool-bar, respectively. If the alist entries are added,
3315 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3317 *** The menu bar bindings's caches are not used any more.
3318 Use (where-is-internal <def> nil t) instead.
3320 ** Regions created by mouse dragging are now normal active regions,
3321 similar to those created by shift-selection (see Selection changes
3322 above). In previous Emacs versions, these regions were delineated by
3323 `mouse-drag-overlay'; that variable has been removed.
3325 ** The fourth argument of `filter-buffer-substring' has been removed.
3326 If you want to remove text properties from the final result, simply
3327 pass the result through substring-no-properties.
3329 ** cl.el no longer provides `cl-19'.
3331 ** The following obsolete functions and aliases have been removed
3332 (the appropriate new function is given in parentheses; "not needed"
3333 means you can just remove all calls to the function in question):
3335 *** `comint-kill-output' (`comint-delete-output')
3336 *** `decompose-composite-char' (`char-to-string')
3337 *** `outline-visible' (`outline-invisible-p')
3338 *** `internal-find-face' (`facep')
3339 *** `internal-get-face' (`facep and check-face')
3340 *** `frame-update-faces' (not needed)
3341 *** `frame-update-face-colors' (`frame-set-background-mode')
3342 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3343 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3344 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3345 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3346 *** `x-make-font-unbold' (`make-face-unbold')
3347 *** `x-make-font-unitalic' (`make-face-unitalic')
3348 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3349 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3350 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3351 *** `char-bytes' (== 1)
3352 *** `isearch-return-char' (`isearch-printing-char')
3353 *** `make-local-hook' (not needed)
3354 *** `set-screen-height' (`set-frame-height')
3355 *** `set-screen-width' (`set-frame-width')
3357 ** The following obsolete variables and varaliases have been removed
3358 (the appropriate new variable is given in parentheses):
3360 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3361 *** `vc-header-alist' (`vc-BACKEND-header')
3362 *** `directory-sep-char' (== ?/)
3363 *** `font-lock-defaults-alist' (`font-lock-defaults')
3364 *** `e' (`float-e').
3366 ** The following obsolete files were removed:
3367 sc.el, x-menu.el, rnews.el, rnewspost.el
3369 ** The format of the finder-inf.el file has changed, since the Finder
3370 mechanism is now based on the package system. The variable
3371 `finder-package-info' is replaced by `package--builtins' and
3372 `finder-keywords-hash'.
3374 ** When generating autoloads, `update-directory-autoloads' no longer
3375 assumes every inspected file is in your `load-path'. It instead
3376 generates relative names according to the current `load-path'.
3379 * Lisp Changes in Emacs 24.1
3381 ** Code can now use lexical scoping by default instead of dynamic scoping.
3382 The `lexical-binding' variable enables lexical scoping for local
3383 variables. It is typically set via a file-local variable in the first
3384 line of the file, in which case it applies to all the code in that
3387 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3388 binding instead of the old dynamic binding mode.
3390 *** Lexically scoped interpreted functions are represented with a new form
3391 of function value which looks like (closure ENV ARGS &rest BODY).
3393 *** New macro `letrec' to define recursive local functions.
3395 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3396 So do `defcustom' and other forms that call `defvar' as a subroutine.
3398 *** New function `special-variable-p' to check whether a variable is
3399 declared as dynamically bound.
3401 *** The form ((lambda ...) ...) is deprecated.
3403 ** An Emacs Lisp testing tool is now included.
3404 Emacs Lisp developers can use this tool to write automated tests for
3405 their code. See the ERT info manual for details.
3407 ** Changes for bidirectional display and editing
3409 *** New function `current-bidi-paragraph-direction'.
3410 This returns the base direction of the paragraph at point.
3412 *** New function `bidi-string-mark-left-to-right'.
3413 Given a string containing characters from right-to-left scripts, this
3414 function returns another string which can be safely inserted into a
3415 buffer, such that any following text will be always displayed to the
3416 right of that string. (This works by appending an invisible Unicode
3417 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3419 This is useful when the buffer has overall left-to-right paragraph
3420 direction and you need to insert a string whose contents are not known
3421 in advance, without disrupting the layout of the line.
3425 *** Window tree functions are accessible in Elisp.
3426 Functions are provided to return the parent, siblings or child windows
3427 of any window including internal windows (windows not associated with a
3428 buffer) in the window tree.
3430 **** New function `window-valid-p' gives non-nil for live and internal
3433 **** Window manipulation can deal with internal windows.
3434 Many window handling functions like `split-window', `delete-window', or
3435 `delete-other-windows' as well as the window resizing functions can now
3436 act on any window including internal ones.
3438 *** window-total-height/-width vs window-body-height/-width.
3439 The function `window-height' has been renamed to `window-total-height'
3440 and `window-width' has been renamed to `window-body-width'. The old
3441 names are provided as aliases. Two new functions `window-total-width'
3442 and `window-body-height' are provided.
3444 *** Window parameters specific to window handling functions.
3445 For each window you can specify a parameter to override the default
3446 behavior of a number of functions like `split-window', `delete-window'
3447 and `delete-other-windows'. The variable `ignore-window-parameters'
3448 allows to ignore processing such parameters.
3450 *** New semantics of third argument of `split-window'.
3451 The third argument of `split-window' has been renamed to SIDE and can be
3452 set to any of the values 'below, 'right, 'above, or 'left to make the
3453 new window appear on the corresponding side of the window that shall be
3454 split. Any other value of SIDE will cause `split-window' to split the
3455 window into two side-by-side windows as before.
3457 *** Window resizing functions.
3458 A new standard function for resizing windows called `window-resize' has
3459 been introduced. This and all other functions for resizing windows no
3460 longer delete any windows when they become too small.
3462 *** Deleting the selected window now selects the most recently selected
3463 live window on that frame instead.
3465 *** `adjust-window-trailing-edge' adjustments.
3466 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3467 is able to resize other windows if a window adjacent to the trailing
3468 edge cannot be shrunk any more. This makes its behavior more similar to
3469 that of Emacs 21 without compromising, however, its inability to delete
3470 windows which was introduced in Emacs 22.
3472 *** Window-local buffer lists.
3473 Windows now have local buffer lists. This means that removing a buffer
3474 from display in a window will preferably show the buffer previously
3475 shown in that window with its previous window-start and window-point
3476 positions. This also means that the same buffer may be automatically
3477 shown twice even if it already appears in another window.
3479 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3480 which if non-nil requires the buffer to be displayed in the currently
3481 selected window, signaling an error otherwise. If nil, another window
3482 can be used, e.g. if the selected one is strongly dedicated.
3484 *** `split-window-vertically' and `split-window-horizontally' renamed
3485 to `split-window-below' and `split-window-right' respectively.
3486 The old names are kept as aliases.
3490 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3491 named ACTION, and takes a display action of the same form as
3492 `display-buffer-base-action' (see Changes, above). A non-nil,
3493 non-list value is treated specially, as the old meaning.
3495 **** New variable `display-buffer-overriding-action'.
3497 **** The procedure of `display-buffer' etc. to choose a window is
3498 determined by combining `display-buffer-overriding-action',
3499 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3500 and `display-buffer-fallback-action'. The second and fourth of these
3501 are user-customizable variables.
3503 See the docstring of `display-buffer' for details.
3505 *** New functions `window-state-get' and `window-state-put'.
3506 These functions allow to save and restore the state of an arbitrary
3507 frame or window as an Elisp object.
3511 *** New variable `completion-extra-properties' used to specify extra
3512 properties of the current completion:
3513 - :annotate-function, same as the old completion-annotate-function.
3514 - :exit-function, function to call after completion took place.
3516 *** Functions on `completion-at-point-functions' can return any of the
3517 properties valid for `completion-extra-properties'.
3519 *** `completion-annotate-function' is obsolete.
3521 *** New `metadata' method for completion tables. The metadata thus returned
3522 can specify various details of the data returned by `all-completions':
3523 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3524 used to select a style in completion-category-overrides.
3525 - `annotation-function' to add annotations in *Completions*.
3526 - `display-sort-function' to specify how to sort entries in *Completions*.
3527 - `cycle-sort-function' to specify how to sort entries when cycling.
3529 *** `minibuffer-local-filename-must-match-map' is not used any more.
3530 Instead, the bindings in `minibuffer-local-filename-completion-map'
3531 are combined with `minibuffer-local-must-match-map'.
3533 *** New variable `completing-read-function' allows overriding the
3534 behavior of `completing-read'.
3536 ** `glyphless-char-display' can now distinguish between graphical and
3537 text terminal display, via a char-table entry that is a cons cell.
3539 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3540 Instead, the offending function is removed.
3544 *** New function `run-hook-wrapped' for running an abnormal hook by
3545 passing the hook functions as arguments to a "wrapping" function.
3546 Like `run-hook-with-args-until-success', it stops at the first
3547 non-nil return value.
3549 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3550 set of "wrapping" filters, similar to around advice.
3551 (A version of this macro was actually added in Emacs 23.2 but was not
3552 advertised at the time.)
3556 *** New macro `condition-case-unless-debug' (this was actually added in
3557 Emacs 23.1 as condition-case-no-debug, but not advertised)
3559 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3561 *** Variable `stack-trace-on-error' removed.
3563 *** The debugger can now "continue" from an error, which means it will
3564 jump to the error handler as if the debugger had not been invoked
3565 instead of jumping all the way to the top-level.
3567 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3568 This can be useful when `inhibit-quit' is set.
3570 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3571 named Emacs server instances.
3573 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3574 to redirect STDOUT to a file.
3576 ** The function `format-time-string' now supports the %N directive,
3577 for higher-resolution time stamps.
3579 ** New input reading functions
3581 *** New function `read-char-choice' reads a restricted set of
3582 characters, discarding any inputs not inside the set.
3584 *** The command `read-color' now requires a match for a color name
3585 or RGB triplet, instead of signaling an error if the user provides
3588 **** `facemenu-read-color' is now an alias for `read-color'.
3590 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3591 The variable is now used to load all kind of supported dynamic libraries,
3592 not just image libraries. The previous name is still available as an
3595 ** Syntax parsing changes
3597 *** New variable `syntax-propertize-function'.
3598 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3599 This allows syntax-table properties to be set independently from font-lock:
3600 just call syntax-propertize to make sure the text is propertized.
3601 Together with this new variable come a new hook
3602 syntax-propertize-extend-region-functions, as well as two helper functions:
3603 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3604 as-is; and syntax-propertize-rules which provides a new way to specify
3607 *** Syntax tables support a new "comment style c" additionally to style b.
3609 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3611 ** frame-local variables cannot be let-bound any more.
3613 ** Major and minor mode changes
3615 *** `set-auto-mode' now respects mode: local variables at the end of files,
3616 as well as those in the -*- line.
3618 *** `prog-mode' is a new major mode from which programming modes
3621 **** `prog-mode-hook' can be used to enable features for programming
3622 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3623 on-the-fly spell checking for comments and strings.
3625 *** New hook `change-major-mode-after-body-hook', run by
3626 `run-mode-hooks' just before any other mode hooks.
3628 *** Enabled globalized minor modes can be disabled in specific major modes.
3629 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3630 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3632 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3634 ** File-handling changes
3636 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3637 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3638 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3639 argument is supplied (see Trash changes, above).
3641 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3643 ** Tool-bars can display separators.
3644 Tool-bar separators are handled like menu separators in menu-bar maps,
3645 i.e. via menu entries of the form `(menu-item "--")'.
3649 *** Animated images support (currently animated gifs only).
3651 **** `image-animated-p' returns non-nil if an image can be animated.
3653 **** `image-animate' animates a supplied image spec.
3655 **** `image-animate-timer' returns the timer object for an image that
3658 *** `image-extension-data' has been renamed to `image-metadata'.
3659 The old name is an obsolete alias to the new one.
3661 *** Image mode can view any image type that ImageMagick supports.
3662 This requires Emacs to be built with ImageMagick support.
3664 **** New function `imagemagick-types', defined if ImageMagick support
3665 is enabled, returns a list of image file extensions that your
3666 ImageMagick installation supports.
3668 **** New function `imagemagick-register-types' enables ImageMagick
3669 image types in Image mode and in `create-image' and other helper
3672 **** New option `imagemagick-types-inhibit' excludes certain
3673 ImageMagick image types from `imagemagick-register-types'.
3675 **** With ImageMagick support, there are extra Image mode commands to
3676 resize and rotate images: `image-transform-fit-to-height',
3677 `image-transform-fit-to-width', `image-transform-set-rotation', and
3678 `image-transform-set-scale'.
3680 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3681 passes it to the mail user agent function. This argument specifies an
3682 action for returning to the caller after finishing with the mail. For
3683 example, this is used by Rmail to optionally delete a mail window.
3685 ** XML and HTML parsing
3686 If Emacs is compiled with libxml2 support, there are two new
3687 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3688 and `libxml-parse-xml-region' (which parses XML). Both return an
3689 Emacs Lisp parse tree.
3691 ** Networking and encryption changes
3693 *** `open-network-stream' can now be used to open an encrypted stream.
3694 It now accepts an optional `:type' parameter for initiating a TLS
3695 connection, directly or via STARTTLS. To do STARTTLS, additional
3696 parameters (`:end-of-command', `:success', `:capabilities-command')
3697 must also be supplied.
3699 *** New library gnutls.el.
3700 The new function `gnutls-available-p' returns non-nil if Emacs is
3701 built with GnuTLS support. The main entry points are
3702 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3703 these functions through `open-network-stream', because that can
3704 upgrade connections through STARTTLS opportunistically or use plain
3705 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3708 *** New primitive `secure-hash' that supports many secure hash algorithms:
3709 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3710 sha1.el has been removed. The `sha1' feature is provided by default.
3714 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3716 ** Progress reporters can now "spin".
3717 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3718 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3719 time you call `progress-reporter-update' on that progress reporter,
3720 with a nil or omitted VALUE argument, the reporter message is
3721 displayed with a "spinning bar".
3723 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3724 being reverted, even if the buffer has a local `revert-buffer-function'.
3726 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3727 If delayed-warnings-list is non-nil, the command loop calls
3728 `delayed-warnings-hook' after `post-command-hook'. At present, this
3729 is only used by Emacs on some platforms to display warnings during
3730 startup, which might otherwise not be noticed. This uses the
3731 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3733 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3735 ** New function `make-composed-keymap' that constructs a new keymap
3736 from multiple input maps. You can use this to make a keymap that
3737 inherits from multiple maps, eg:
3738 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3740 ** New function `string-prefix-p'.
3741 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3743 ** New reader macro ## that stands for the empty symbol.
3744 This means that the empty symbol can now be read back. Also, #: by itself
3745 (when not immediately followed by a possible symbol character) stands for
3746 an empty uninterned symbol.
3748 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3750 ** The following functions and variables are obsolete:
3752 *** `tooltip-use-echo-area' is obsolete.
3753 Rather than setting this to t, disable Tooltip mode instead.
3755 *** buffer-substring-filters is obsolete.
3756 Use `filter-buffer-substring-functions' instead.
3758 *** `byte-compile-disable-print-circle' is obsolete.
3760 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3761 Use `post-command-hook' instead.
3763 *** `font-lock-maximum-size' is obsolete.
3766 * Changes in Emacs 24.1 on Non-Free Operating Systems
3768 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3769 and also when HOME is set to C:\ by default.
3771 ** New configure.bat options
3773 *** --enable-checking builds Emacs with extra runtime checks.
3775 *** --distfiles specifies files to be included in binary distribution.
3777 *** --without-gnutls disables automatic GnuTLS detection.
3779 *** --lib for general library linkage, works with the USER_LIBS build variable.
3781 ** New make target `dist' to create binary distribution for MS Windows.
3783 ** The Lisp function `w32-default-color-map' is now obsolete.
3784 (It is only used internally in the Emacs C code.)
3786 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3787 reappear on mouse-over. (Requires OS X 10.6 or later.)
3789 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3790 other platforms, rather than inserting its contents into the buffer.
3793 ----------------------------------------------------------------------
3794 This file is part of GNU Emacs.
3796 GNU Emacs is free software: you can redistribute it and/or modify
3797 it under the terms of the GNU General Public License as published by
3798 the Free Software Foundation, either version 3 of the License, or
3799 (at your option) any later version.
3801 GNU Emacs is distributed in the hope that it will be useful,
3802 but WITHOUT ANY WARRANTY; without even the implied warranty of
3803 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3804 GNU General Public License for more details.
3806 You should have received a copy of the GNU General Public License
3807 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3812 paragraph-separate: "[
\f]*$"