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 `describe-function' was extended for EIEIO.
172 Running it on constructors will show a full description of the
173 generated class. For generic functions, it will show all
174 implementations together with links to the source. The old commands
175 `describe-class', `describe-constructor' and `describe-generic' were
178 *** The command `quail-help' is deleted. Use `C-h C-\'
179 (`describe-input-method') instead.
184 *** ImageMagick images now support the :max-width and :max-height
187 *** Some data types aren't auto-detected by ImageMagick. Adding
188 :format to `create-image' may help if the content type is in the
189 new variable `image-format-suffixes'.
191 ** Frame and window changes
194 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
195 bound to <f11> and M-<f10>, respectively.
197 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
198 `frame-configuration-to-register'. It offers similar functionality,
199 plus enhancements like the ability to restore deleted frames. The
200 command `frame-configuration-to-register' still exists, but is unbound.
203 *** New hooks `focus-in-hook', `focus-out-hook'.
204 These are normal hooks run when an Emacs frame gains or loses input focus.
207 *** `split-window' is now a non-interactive function, not a command.
208 As a command, it was a special case of `C-x 2' (`split-window-below'),
209 and as such superfluous. After being reimplemented in Lisp, its
210 interactive form was mistakenly retained.
213 *** New option `scroll-bar-adjust-thumb-portion'.
214 Available only on X, this option allows to control over-scrolling
215 using the scroll bar (i.e. dragging the thumb down even when the end
216 of the buffer is visible).
218 ** Lisp evaluation changes
220 *** `eval-defun' on an already defined defcustom calls the :set function,
223 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
224 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
225 a list with no limit on its length and level (by using nil values of
226 `print-length' and `print-level'), and inserts additional formats for
227 integers (octal, hexadecimal, and character).
230 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
233 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
234 because it affects caching of paragraph scanning results as well.
237 ** The option `set-mark-default-inactive' has been deleted.
238 This unfinished feature was introduced by accident in Emacs 23.1;
239 simply disabling Transient Mark mode does the same thing.
241 ** The default value of `comment-use-global-state' is changed to t,
242 and this variable has been marked obsolete.
246 *** `read-regexp-defaults-function' defines a function to read regexps,
247 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp',
248 etc. You can customize this to specify a function that provides a
249 default value from the regexp last history element, or from the symbol
253 *** `load-prefer-newer', affects how the `load' function chooses the
254 file to load. If this is non-nil, then when both .el and .elc
255 versions of a file exist, and the caller did not explicitly specify
256 which one to load, then the newer file is loaded. The default, nil,
257 means to always load the .elc file.
260 * Editing Changes in Emacs 24.4
262 ** Indentation changes
265 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
266 When invoked without a prefix argument, it now activates a transient
267 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
268 the text indentation in the region. Typing any other key resumes
269 normal editing behavior.
271 *** `electric-indent-mode' is enabled by default.
273 *** `tab-stop-list' is now implicitly extended to infinity by repeating
274 the last step. Its default value is changed to nil which means a tab
275 stop every `tab-width' columns.
279 *** New command `cycle-spacing' cycles between spacing conventions:
280 having just one space, no spaces, or reverting to the original
281 spacing. Like `just-one-space', it can handle or ignore newlines and
282 leave different number of spaces.
284 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
285 a 1-letter word, which is an error according to Polish and
286 Czech typography rules. To globally enable this feature, evaluate:
288 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
291 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
293 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
294 Most commands are still unaware of it, but kill/yank do work on the rectangle.
297 ** New option `visual-order-cursor-movement'.
298 If this is non-nil, cursor motion with arrow keys will follow the
299 visual order of characters on the screen: <left> always moves to the
300 left, <right> always moves to the right, disregarding the surrounding
301 bidirectional context.
305 *** All register commands can now show help with preview.
308 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
311 *** New command `C-x r f' (`frameset-to-register').
312 See Changes in Emacs 24.4, above.
314 ** New command `delete-duplicate-lines'.
315 When its arg ADJACENT is non-nil (when called interactively with C-u
316 C-u) it works like the utility `uniq'. Otherwise by default it
317 deletes duplicate lines everywhere in the region without regard to
318 adjacency. When its arg KEEP-BLANKS is non-nil (when called
319 interactively with C-u C-u C-u), duplicate blank lines are preserved.
322 * Changes in Specialized Modes and Packages in Emacs 24.4
324 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
326 ~/.emacs.d/timelog replaces ~/.timelog
327 ~/.emacs.d/vip replaces ~/.vip
328 ~/.emacs.d/viper replaces ~/.viper
329 ~/.emacs.d/ido.last replaces ~/.ido.last
330 ~/.emacs.d/kkcrc replaces ~/.kkcrc
331 ~/.emacs.d/quickurls replaces ~/.quickurls
332 ~/.emacs.d/idlwave replaces ~/.idlwave
333 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
334 ~/.emacs.d/places replaces ~/.emacs-places
335 ~/.emacs.d/shadows replaces ~/.shadows
336 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
337 ~/.emacs.d/strokes replaces ~/.strokes
338 ~/.emacs.d/notes replaces ~/.notes
339 ~/.emacs.d/type-break replaces ~/.type-break
340 Also the following files used by the now obsolete otodo-mode.el:
341 ~/.emacs.d/todo-do replaces ~/.todo-do
342 ~/.emacs.d/todo-done replaces ~/.todo-done
343 ~/.emacs.d/todo-top replaces ~/.todo-top
345 ** Backtrace and debugger
347 *** The Lisp debugger's `e' command now includes the lexical environment
348 when evaluating the code in the context at point. Hence, it now lets
349 you access lexical variables.
352 *** New command `v' (`debugger-toggle-locals') displays local vars.
354 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
355 code run via JIT Lock.
360 *** Battery information via the BSD `apm' utility is now supported.
364 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
366 ** Calendar and Diary
369 *** New faces `calendar-weekday-header', `calendar-weekend-header',
370 and `calendar-month-header'.
373 *** New option `calendar-day-header-array'.
376 *** New variable `diary-from-outlook-function', used by the command
377 `diary-from-outlook'.
380 *** The variable `calendar-font-lock-keywords' is obsolete.
384 *** Calc by default now uses the Gregorian calendar for all dates, and
385 uses January 1, 1 AD as its day number 1. Previously Calc used the
386 Julian calendar for dates before September 14, 1752, and it used
387 December 31, 1 BC as its day number 1; the new scheme is more
388 consistent with Calendar's calendrical system and day numbering.
390 *** The new variable `calc-gregorian-switch' lets you configure the
391 date when Calc switches from the Julian to the Gregorian calendar.
392 Nil, the default value, means to always use the Gregorian calendar.
393 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
396 *** Support for ISO 8601 dates.
402 **** The cpp-root project now supports executing a compile command.
403 It can be set through the new :compile-command slot or the
404 buffer-local variable `compile-command'.
406 **** Better selection of include directories for the 'linux' project.
407 Include directories now support out-of-tree build directories and
408 target architecture auto-detection.
412 **** Improved detection of used namespaces in current scope in C++.
414 **** Parsing of default values for variables and function arguments in C/C++.
415 They are also displayed by the summarize feature in the modeline.
417 **** Improved parsing of function pointers in C/C++.
418 This also includes parsing of function pointers as function arguments.
420 **** Parsing of C/C++ preprocessor macros which open new scope.
421 For example, this enables parsing of macros which open new namespaces.
423 **** Support for 'this' pointer in inline member functions in C++.
427 *** New macro `cl-tagbody'.
430 *** letf is now just an alias for cl-letf.
434 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
435 Hence, you can now enable it independently from `transient-mark-mode',
436 `delete-selection-mode', and `shift-select-mode'.
438 *** `cua-highlight-region-shift-only' is now obsolete.
439 You can disable `transient-mark-mode' to get the same result.
441 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
445 *** Support for completion, ElDoc, and Flycheck has been added.
447 *** The current CFEngine syntax is parsed from "cf-promises -s json".
448 There is a fallback syntax available if you don't have cf-promises or
449 if it doesn't support that option.
451 ** Delete Selection mode can now be used without `transient-mark-mode'.
455 *** `desktop-auto-save-timeout' defines the number of seconds idle time
456 before auto-save of the desktop.
458 *** `desktop-restore-frames', enabled by default, allows saving and
459 restoring the frame/window configuration (frameset). Additional options
460 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
461 and `desktop-restore-forces-onscreen' offer further customization.
466 *** New minor mode `dired-hide-details-mode' hides details.
468 ** Eldoc Mode works properly in the minibuffer.
470 ** Electric Pair mode
471 *** New `electric-pair-preserve-balance' enabled by default.
473 Pairing/skipping only kicks in when that help the balance of
474 parentheses and quotes, i.e. the buffer should end up at least as
477 You can further control this behavior by adjusting the predicates
478 stored in `electric-pair-inhibit-predicate' and
479 `electric-pair-skip-self'.
481 *** New `electric-pair-delete-adjacent-pairs' enabled by default.
483 In `electric-pair-mode', the commands `backward-delete-char' and
484 `backward-delete-char-untabify' are now bound to electric variants
485 that delete the closer when invoked between adjacent pairs.
487 *** New `electric-pair-open-newline-between-pairs' enabled by default.
489 In `electric-pair-mode', inserting a newline between adjacent pairs
490 opens an extra newline after point, which is indented if
491 `electric-indent-mode' is also set.
493 *** New `electric-pair-skip-whitespace' enabled by default.
495 Controls if skipping over closing delimiters should jump over any
496 whitespace slack. Setting it to `chomp' makes it delete this
497 whitespace. See also the variable
498 `electric-pair-skip-whitespace-chars'.
500 *** New variables control the pairing in strings and comments.
502 You can customize `electric-pair-text-pairs' and
503 `electric-pair-text-syntax-table' to tweak pairing behavior inside
504 strings and comments.
508 *** New option `epa-mail-aliases'.
510 You can set this to a list of alias expansions for keys to use
511 in `epa-mail-encrypt'.
513 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
514 that means: when one of the recipients of the message being encrypted
515 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
517 If one element of the variable's value is ("foo@bar.com"),
518 that means: when one of the recipients of the message being encrypted
519 is `foo@bar.com', ignore that name as regards encryption.
520 This is useful to avoid a query when you have no key for that name.
524 *** New option `erc-accidental-paste-threshold-seconds'.
525 If set to a number, this can be used to avoid accidentally paste large
526 amounts of data into the ERC input.
531 *** New macro `skip-unless' allows skipping ERT tests.
532 See the ERT manual for details.
537 *** `eshell' now supports visual subcommands and options
538 Eshell has been able to handle "visual" commands (interactive,
539 non-line oriented commands such as top that require display
540 capabilities not provided by eshell) by running them in an Emacs
541 terminal emulator. See `eshell-visual-commands'.
543 This feature has been extended to subcommands and options that make a
544 usually line-oriented command a visual command. Typical examples are
545 "git log" and "git <command> --help" which display their output in a
546 pager by default. See `eshell-visual-subcommands' and
547 `eshell-visual-options'.
550 *** Added Eshell-Tramp module
551 External su and sudo commands are now the default; the internal,
552 Tramp-using variants can still be used by enabling the eshell-tramp
557 *** New option `f90-smart-end-names'.
559 ** Icomplete is a bit more like Ido.
561 *** key bindings to navigate through and select the completions.
563 *** The icomplete-separator is customizable, and its default has changed.
565 *** Removed icomplete-show-key-bindings.
567 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
568 (setq icomplete-with-completion-tables '(internal-complete-buffer))
569 will revert to the old behavior.
573 *** Ido has a manual now.
575 *** `ido-use-virtual-buffers' takes a new value 'auto.
577 *** `ido-decorations' has been slightly extended to give a bit more control.
582 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
583 visit the next image file and the previous image file in the same
584 directory, respectively.
587 *** New commands to show specific frames of multi-frame images.
588 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
589 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
592 *** New commands to speed up, slow down, or reverse animation.
593 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
594 speed up and slow down the animation. `a r' (`image-reverse-speed')
595 to reverse it and `a 0' (`image-reset-speed') to reset it.
598 *** The command `image-mode-fit-frame' deletes other windows.
599 When toggling, it restores the frame's previous window configuration.
600 It also has an optional frame argument, which can be used by Lisp
601 callers to fit the image to a frame other than the selected frame.
605 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
606 will cycle through faces in `hi-lock-face-defaults' without prompting.
609 *** New global command `M-s h .' (`highlight-symbol-at-point')
610 highlights the symbol found near point without prompting,
611 using the next face automatically.
615 *** New option `imenu-generic-skip-comments-and-strings'.
619 *** New face `info-index-match' is used to highlight matches in index
620 entries displayed by `Info-index-next', `Info-virtual-index' and
625 *** Better indentation of multiple-variable declarations.
626 If declaration spans several lines, variables on the following lines
627 are lined up to the first one.
629 *** We now recognize and better indent continuations in array
632 *** New option `js-switch-indent-offset`.
634 ** MH-E has been updated to MH-E version 8.5.
635 See MH-E-NEWS for details.
639 *** Font locking for texinfo comments and new keywords
640 *** Completion in Octave file buffers
642 *** Jump to definition
643 *** Documentation lookup/search
644 *** Code cleanup and various bug fixes
646 ** OPascal mode is the new name for Delphi mode.
648 *** All delphi-* variables and functions have been renamed to opascal-*.
649 *** `delphi-newline-always-indents' is not supported any more.
650 Use `electric-indent-mode' instead.
651 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
655 *** The format of `archive-contents' files, generated by package
656 repositories, has changed to allow a new (fifth) element in the data
657 vectors, containing an associative list with extra properties.
659 *** `describe-package' buffer uses the `:url' extra property to
660 display a `Homepage' header, if it's present.
662 *** In the buffer produced by `describe-package', there are now buttons
663 listing the keywords related to that package. You can click on them
664 to see other packages related to any given keyword.
666 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
667 the packages by a keyword.
671 *** `prolog-use-smie' has been removed, along with the non-SMIE
676 *** The new command `remember-notes' creates a buffer which is saved
679 You may think of it as a *scratch* buffer whose content is preserved.
680 In fact, it was designed as a replacement for *scratch* buffer and can
681 be used that way by setting `initial-buffer-choice' to
682 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
683 Without the second change, *scratch* buffer will still be there for
684 notes that do not need to be preserved.
686 *** The Remember package can now store notes in separates files.
687 You can use the new function `remember-store-in-files' within the
688 `remember-handler-functions' option.
690 See `remember-data-directory' and `remember-directory-file-name-format'
691 for new options related to this function.
695 *** Customize `rmail-mbox-format' to influence some minor aspects of
696 how Rmail displays non-MIME messages.
699 *** The `unrmail' command now converts from BABYL to mboxrd format,
700 rather than mboxo. Customize `unrmail-mbox-format' to change this.
704 *** New option `ruby-encoding-magic-comment-style'.
706 *** New option `ruby-custom-encoding-magic-comment-template'.
710 *** Improved syntax highlighting and indentation.
712 *** Add more Ruby file types to `auto-mode-alist'.
714 *** New option `ruby-align-to-stmt-keywords'.
716 *** New `electric-indent-mode' integration.
718 ** Search and Replace
721 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
722 starts a symbol (identifier) incremental search forward with the
723 symbol found near point added to the search string initially.
726 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
727 and adds it to the search string.
729 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
730 between nil and the value of the option `search-invisible' (or `open'
733 *** `query-replace' skips invisible text when `search-invisible' is nil,
734 and opens overlays with hidden text when `search-invisible' is `open'.
737 *** A negative prefix arg of replacement commands replaces backward.
738 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
739 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
742 *** By default, prefix arguments do not now terminate Isearch mode.
743 Set `isearch-allow-prefix' to nil to restore old behavior.
746 *** More Isearch commands accept prefix arguments, namely
747 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
751 *** Word search now matches whitespace at the beginning/end
752 of the search string if it contains leading/trailing whitespace.
753 In an incremental word search or when using a non-nil LAX argument
754 of `word-search-regexp', the lax matching can also match part of
755 the first word (in addition to the lax matching of the last word).
756 The same rules are now applied to the symbol search with the difference
757 that it matches symbols, and non-symbol characters between symbols.
762 *** New command `ses-rename-cell' allows assigning names to SES cells.
766 *** `explicit-bash-args' now always defaults to use --noediting.
767 During initialization, Emacs no longer expends a process to decide
768 whether it is safe to use Bash's --noediting option. These days
769 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
773 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
774 You can pick the name of the function and the variables with `C-x 4 a'.
776 *** The SMIE indentation engine is now used by default.
778 ** SMIE indentation can be customized via `smie-config'.
779 The customization can be guessed by Emacs by providing a sample indented
780 file and letting SMIE learn from it.
784 *** New option `term-suppress-hard-newline'.
786 ** Todo mode has been rewritten and enhanced.
787 New features include:
788 - support for multiple todo files and archive files of done items;
789 - renaming, reordering, moving, merging, and deleting categories;
790 - sortable tabular summaries of categories and the types of items they contain;
791 - cross-category lists of items filtered by specific criteria;
792 - more fine-grained interaction with the Emacs diary, by being able to decide
793 for each todo item whether it appears in the Fancy Diary display;
794 - highly flexible new item insertion and item editing;
795 - moving items between categories, storing done items in their category or in
796 archive files, undoing or unarchiving done items;
797 - reprioritizing items by inputting a numerical priority;
798 - extensive customizability of operation and display, including numerous faces.
799 The Todo mode user manual describes all commands and most user options.
800 To support some of these features, a new file format is used, which is
801 incompatible with the old format; however, you can convert old todo and done
802 item files to the new format on initializing the first new todo file, or at any
803 later time with the provided conversion command. The old version of
804 todo-mode.el has been made obsolete and renamed otodo-mode.el.
806 ** trace-function was largely rewritten.
807 New features include:
808 - no prompting for the destination buffer, unless a prefix-arg was used.
809 - additionally to prompting for a destination buffer, when a prefix-arg is
810 used, the user can enter a "context", i.e. Lisp expression whose value at the
811 time the function is entered/exited will be printed along with the function
812 name and arguments. Useful to trace the value of (current-buffer) or
813 (point) when the function is invoked.
817 *** The experimental url syntax for remote file names is withdrawn.
820 *** New connection method "adb", which allows to access Android
821 devices by the Android Debug Bridge. The variable `tramp-adb-program'
822 can be used to adapt the path of the "adb" program, if needed.
824 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
825 "scpc" and "rsyncc" are discontinued. The ssh option
826 "ControlMaster=auto" is set automatically in all ssh-based methods,
830 *** Handlers for `file-acl' and `set-file-acl' for remote machines
831 which support POSIX ACLs.
834 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
835 for remote machines which support filesystem notifications.
837 ** New command `url-cookie-list' displays all the current cookies, and
838 allows deleting selected cookies.
840 ** VC and related modes
843 *** In VC directory mode, `D' displays diffs between VC-controlled
844 whole tree revisions.
847 *** In VC directory mode, `L' lists the change log for the current VC
848 controlled tree in a window.
851 *** In VC directory mode, `I' shows a log of changes that will be
852 received with a pull operation.
855 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
856 under current version control system. When called with a prefix
857 argument, you can remove a file from the ignored file list.
860 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
861 because it is moved to vc-cvs.el.
865 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
867 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
871 *** The commands `woman-default-faces' and `woman-monochrome-faces'
872 are obsolete. Customize the `woman-*' faces instead.
874 ** Obsolete packages:
876 *** Iswitchb is made obsolete by icomplete-mode.
878 *** longlines.el is obsolete; use visual-line-mode instead.
883 *** terminal.el is obsolete; use term.el instead.
885 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
887 *** xesam.el is obsolete, because the XESAM project has been canceled.
890 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
893 *** The Info-edit command is obsolete. Editing Info nodes by hand
894 has not been relevant for some time.
897 * New Modes and Packages in Emacs 24.4
900 ** New package `eww' is a built-in web browser.
901 It is only available if Emacs is compiled with libxml2 support.
903 ** New minor mode `superword-mode', defined in subword.el
904 `superword-mode' overrides the default word motion commands to treat
905 symbol_words as a single word, similar to what `subword-mode' does and
906 using the same internal functions.
909 ** New package nadvice.el offers lighter-weight advice facilities.
911 - add-function/remove-function which can be used to add/remove code on any
912 function-carrying place, such as process-filters or `<foo>-function' hooks.
913 - advice-add/advice-remove to add/remove a piece of advice on a named function,
914 much like `defadvice' does.
916 ** New package frameset.el.
917 It provides a set of operations to save a frameset (the state of all
918 or a subset of the existing frames and windows, somewhat similar to a
919 frame configuration), both in-session and persistently, and restore it
920 at some point in the future.
923 ** New package filenotify.el provides an interface for file system
924 notifications. It requires that Emacs be compiled with one of the
925 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
928 * Incompatible Lisp Changes in Emacs 24.4
931 ** `kill-region' lost its `yank-handler' optional argument.
934 ** `(input-pending-p)' no longer runs other timers which are ready to
935 run. The new optional CHECK-TIMERS param allows for the prior behavior.
938 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
941 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
942 Some languages match those as »...« and others as «...» so better stay neutral.
945 ** In compiled Lisp files, the header no longer includes a timestamp.
948 ** The default file coding for Emacs Lisp files is now utf-8.
949 (See `file-coding-system-alist'.) In most cases, this change is
950 transparent, but files that contain unusual characters without
951 specifying an explicit coding system may fail to load with obscure
952 errors. You should either convert them to utf-8 or add an explicit
956 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
957 It used to disable the minor mode, major mode, and text-property keymaps,
958 whereas now it simply has higher precedence.
960 ** Default process filters and sentinels are not nil any more.
961 Instead they default to a function which does what the nil value used to do.
964 ** `read-event' does not return decoded chars in ttys any more.
965 As was the case in Emacs 22 and before, the decoding of terminal
966 input, according to `keyboard-coding-system', is not performed in
967 `read-event' any more. But unlike in Emacs 22, this decoding is still
968 done before input-decode-map, function-key-map, etc.
971 ** Removed `inhibit-local-menu-bar-menus'.
974 ** Frame-local variables that affect redisplay do not work any more.
975 More specifically, the redisplay does not bother to check for a frame-local
976 value when looking up variables.
979 ** nil and "unbound" are indistinguishable in `symbol-function'.
980 `symbol-function' does not signal a `void-function' error any more.
981 To determine if a symbol's function definition is void, use `fboundp'.
984 ** `defadvice' does not honor the `freeze' flag and cannot advise
985 special-forms any more.
988 ** `dolist' no longer binds VAR while evaluating the RESULT form,
989 when lexical binding is enabled. Previously, VAR was bound to nil,
990 which often led to spurious unused-variable warnings.
993 ** The return value of `backup-buffer' has changed.
994 The second argument is no longer an SELinux context, instead it is an
995 alist of extended attributes as returned by the new function
996 `file-extended-attributes'. The attributes can be applied to another
997 file using `set-file-extended-attributes'.
1000 ** By default `copy-file' no longer copies file permission bits to an
1001 existing destination; and it sets the file permission bits of a newly
1002 created destination to those of the source, masked by the default file
1003 permissions. To copy the file permission bits, pass t as the
1004 PRESERVE-PERMISSIONS argument of `copy-file'.
1007 ** `visited-file-modtime' now returns -1 for nonexistent files.
1008 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1009 in the presence of files with negative time stamps.
1012 ** The cars of the elements in `interpreter-mode-alist' are now
1013 treated as regexps rather than literal strings.
1016 * Lisp Changes in Emacs 24.4
1019 ** The second argument of `eval' can now specify a lexical environment.
1022 ** New functions `special-form-p' and `macrop'.
1024 ** New macro `define-alternatives' can be used to define generic commands.
1025 Generic commands are interactive functions whose implementation can be
1026 selected among several alternatives, as a matter of user preference.
1028 ** The `defalias-fset-function' property lets you catch `defalias'
1029 calls, and redirect them to your own function, instead of `fset'.
1032 ** New variable `enable-dir-local-variables'.
1033 Directory-local variables are ignored if this is nil. This may be
1034 useful for modes that want to ignore directory-locals while still
1035 respecting file-local variables.
1038 ** New function `get-pos-property'.
1040 ** Completion changes
1042 *** The separator for `completing-read-multiple' can now be a regexp.
1043 The default separator has been changed to allow surrounding spaces
1046 *** The `common-substring' arg of `display-completion-list' is obsolete.
1047 Either use `completion-all-completions', which returns highlighted
1048 strings (including for partial or substring completion), or call
1049 `completion-hilit-commonality' to add the highlight.
1051 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1052 let you enable symbol prettification (replacing a string like "lambda" with
1053 the Greek lambda character).
1058 *** Functions to pop up menus and dialogs now work on all terminals,
1059 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1060 `message-box', `yes-or-no-p', etc.
1062 The function `display-popup-menus-p' will now return non-nil for a
1063 display or frame whenever a mouse is supported on that display or
1066 *** New hook `tty-setup-hook'.
1070 *** New display action function `display-buffer-no-window' to not
1071 display the buffer in a window.
1073 *** New display action alist entry `allow-no-window' to indicate the
1074 caller of `display-buffer' is ready to handle the case of not
1075 displaying the buffer in a window.
1077 ** New hook `pre-redisplay-function'.
1080 ** New bool-vector set operation functions:
1081 *** `bool-vector-exclusive-or'
1082 *** `bool-vector-union'
1083 *** `bool-vector-intersection'
1084 *** `bool-vector-set-difference'
1085 *** `bool-vector-not'
1086 *** `bool-vector-subsetp'
1087 *** `bool-vector-count-consecutive'
1088 *** `bool-vector-count-population'
1091 ** Comparison functions =, <, >, <=, >= now take many arguments.
1093 ** Error-handling changes
1096 *** New function `define-error'.
1098 *** `with-demoted-errors' takes an additional argument `format'.
1101 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
1103 ** New library subr-x.el for misc helper functions
1105 *** `hash-table-keys'
1107 *** `hash-table-values'
1109 *** `string-blank-p`
1110 *** `string-empty-p`
1112 *** `string-reverse`
1113 *** `string-trim-left'
1114 *** `string-trim-right'
1116 *** `string-remove-prefix'
1117 *** `string-remove-suffix'
1120 ** Obsoleted functions:
1123 *** `lisp-complete-symbol'
1124 *** `field-complete'
1125 *** `minibuffer-completion-contents'
1126 *** `isearch-nonincremental-exit-minibuffer'
1127 *** `isearch-filter-visible'
1128 *** `generic-make-keywords-list'
1129 *** `get-upcase-table' (use `case-table-get-table' instead).
1131 ** `with-wrapper-hook' is obsoleted by `add-function'.
1132 The few hooks that used with-wrapper-hook are replaced as follows:
1133 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1134 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1135 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1138 ** `byte-compile-interactive-only-functions' is now obsolete.
1139 To specify that a command should only be called interactively, give it
1140 a non-nil `interactive-only' property.
1143 ** `split-string' now takes an optional argument TRIM.
1144 The value, if non-nil, is a regexp that specifies what to trim from
1145 the start and end of each substring.
1148 ** New function `string-suffix-p'.
1150 ** File-handling changes
1153 *** Support for filesystem notifications.
1154 Emacs now supports notifications of filesystem changes, such as
1155 creation, modification, and deletion of files. This requires the
1156 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1157 MS-Windows systems, this is supported for Windows XP and newer
1161 *** The 9th element returned by `file-attributes' is now unspecified.
1162 Formerly, it was t if the file's gid would change if file were deleted
1163 and recreated. This value has been inaccurate for years on many
1164 platforms, and nobody seems to have noticed or cared.
1167 *** The 6th argument to `copy-file' has been renamed to
1168 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1169 Unix file permission bits as well as SELinux context.
1172 *** The function `file-ownership-preserved-p' now has an optional
1173 argument GROUP which causes it check for file group too. This can be
1174 used in place of the 9th element of `file-attributes'.
1177 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1178 argument, with the same interpretation as the returned value of
1179 `visited-file-modtime'.
1181 ** Changes in autorevert.el
1184 *** If Emacs is compiled with file notification support, notifications
1185 are used instead of checking the time stamp of the files. You can
1186 disable this by setting the user option `auto-revert-use-notify' to
1187 nil. Alternatively, a regular expression of directories to be
1188 excluded from file notifications can be specified by
1189 `auto-revert-notify-exclude-dir-regexp'.
1192 *** The new user option `auto-revert-remote-files' enables reversion
1193 of remote files when set to non-nil.
1197 *** The function `face-spec-set' is now like `setq' for face specs.
1198 Its third arg now accepts values specifying a face spec type (defface,
1199 custom, or override spec), and the relevant spec is set accordingly.
1202 *** New function `add-face-text-property', which can be used to
1203 conveniently prepend/append new face properties.
1205 *** Face specs set via Custom themes now replace the `defface' spec
1206 rather than inheriting from it (as do face specs set via Customize).
1208 *** New face characteristic (supports :underline (:style wave))
1209 specifies whether or not the terminal can display a wavy line.
1212 *** New face spec attribute :distant-foreground
1213 specifies foreground to use if background color is near the foreground
1214 color that would otherwise have been used.
1219 *** `image-animated-p' is now `image-multi-frame-p'.
1220 It returns non-nil for any image that contains multiple frames,
1221 whether or not it specifies a frame delay.
1224 *** New variable `image-default-frame-delay' gives the frame delay for
1225 animated images which do not specify a frame delay.
1228 *** New functions `image-current-frame' and `image-show-frame' for getting
1229 and setting the current frame of a multi-frame image.
1233 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1234 **** object-name -> eieio-object-name
1235 **** object-class -> eieio-object-class
1236 **** object-class-fast -> eieio--object-class
1237 **** object-name-string -> eieio-object-name-string
1238 **** object-num-slots -> eieio--object-num-slots
1239 **** object-set-name-string -> eieio-object-set-name-string
1240 **** class-parent -> eieio-class-parent
1241 **** class-parents -> eieio-class-parents
1242 **** class-children -> eieio-class-children
1243 **** class-num-slots -> eieio--class-num-slots
1244 **** class-precedence-list -> eieio-class-precedence-list
1245 **** All generated class-* and object-* field accessors are now
1246 prefixed with `eieio-' as well.
1248 *** Obsoleted functions:
1250 **** class-direct-subclasses
1251 **** class-direct-superclasses
1253 ** Changes in encoding and decoding of text
1256 *** New coding-system `prefer-utf-8'.
1257 This is like `undecided' but prefers UTF-8 on decoding if the text to
1258 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1259 any non-ASCII characters are automatically encoded as UTF-8.
1262 *** New attributes of coding-systems whose type is `undecided'.
1263 Two new attributes, `:inhibit-null-byte-detection' and
1264 `:inhibit-iso-escape-detection', determine how to detect encoding of
1265 text that includes null bytes and ISO-2022 escape sequences,
1266 respectively. Each of these attributes can be either nil, zero, or
1267 t. If it is t, decoding text ignores null bytes and, respectively,
1268 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1269 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1270 text is encoded in one of the ISO-2022 encodings, such as
1271 iso-2022-7bit. If the value is zero, Emacs consults the variables
1272 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1274 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1275 UTF-8 encoding and decoding, whenever possible.
1277 These attributes are only meaningful for coding-systems of type
1278 `undecided'. (The type of a coding-system is determined by its
1279 `:coding-type' attribute and can be accessed by calling the
1280 `coding-system-type' function.)
1282 ** `time-to-seconds' is not obsolete any more.
1284 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1285 When you edit DIR/FILE, Emacs normally creates a symbolic link
1286 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1287 is being edited. Formerly, if there was already a non-symlink file
1288 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1289 through DIR/.#FILE.9. These fallbacks have been removed, so that
1290 Emacs now no longer locks DIR/FILE in that case.
1292 On file systems that do not support symbolic links, the lock is now a
1293 regular file with contents being what would have been in the symlink.
1296 ** New functions `group-gid' and `group-real-gid'.
1298 ** The spelling of the rx.el category `chinese-two-byte' has been
1299 corrected (the first 'e' was missing).
1301 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1304 *** The package descriptor and name of global variables, constants,
1305 and functions should be separated by two hyphens if the symbol is not
1306 meant to be used by other packages.
1309 * Changes in Emacs 24.4 on Non-Free Operating Systems
1311 ** The procedure for building Emacs on MS-Windows has changed.
1312 It is now built by running the same configure script as on all other
1313 platforms. This requires the MSYS environment and MinGW development
1314 tools. See the updated instructions in nt/INSTALL for details.
1316 Using the Posix configure script and Makefile's also means a change in
1317 the directory structure of the Emacs installation on Windows. It is
1318 now the same as on GNU and Unix systems. In particular, the auxiliary
1319 programs, such as cmdproxy.exe and hexl.exe, are in
1320 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1321 version), version-independent site-lisp is in share/emacs/site-lisp,
1322 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1323 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1324 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1325 directories and will find the files in there automatically; there's no
1326 need to set any variables due to this change.)
1329 ** Emacs on Windows 2000 and later can now access files and directories
1330 whose names cannot be encoded in the current system codepage.
1332 The new variable `w32-unicode-filenames' controls this feature: if it
1333 is t, Emacs uses Unicode APIs to pass file names to system calls,
1334 which lifts the limitation of file names to the current locale.
1337 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1338 The backtrace is written to the 'emacs_backtrace.txt' file in the
1339 directory where Emacs was running.
1342 ** The variable `buffer-file-type' is no longer supported.
1343 Setting it has no effect, and %t in the mode-line format is ignored.
1344 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1345 modifying it has no effect.
1348 ** Lock files now work on MS-Windows.
1349 This allows to avoid losing your edits if the same file is being
1350 edited in another Emacs session or by another user. See the node
1351 "Interlocking" in the Emacs User Manual for the details. To disable
1352 file locking, customize `create-lockfiles' to nil.
1354 ** Improved fullscreen support on Mac OS X.
1355 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1356 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1357 native is the default.
1359 ** OSX >= 10.7 can use sRGB colorspace.
1360 Customize `ns-use-srgb-colorspace' to change style. t is the default.
1361 Note: This does not apply to images.
1364 * Installation Changes in Emacs 24.3
1366 ** The default X toolkit is now Gtk+ version 3.
1367 If you don't pass `--with-x-toolkit' to configure, or if you use
1368 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1369 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1370 You can explicitly require a specific version by passing
1371 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1373 ** New configure option `--enable-link-time-optimization', to utilize
1374 an appropriate feature provided by GCC since version 4.5.0.
1376 ** New configure option `--without-all' to disable most of the optional
1377 features (image support, etc.) that are normally enabled by default.
1379 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1380 Emacs). If building with GCC, this enables compile-time checks that
1381 warn/give errors about possibly-questionable C code. On a recent GNU
1382 system there should be no warnings; on older and on non-GNU systems
1383 the results may be useful to developers.
1385 ** The configure option `--enable-use-lisp-union-type' has been
1386 renamed to `--enable-check-lisp-object-type', as the resulting
1387 Lisp_Object type no longer uses a union to implement the compile time
1388 check that this option enables.
1390 ** The configure option `--disable-maintainer-mode' has been removed,
1391 as it was confusingly-named and rarely useful.
1393 ** The configure options `--program-prefix', `--program-suffix', and
1394 `--program-transform-name' apply to more than just the installed
1395 binaries. Now they also affect the man pages, icons, and the
1396 etc/emacs.desktop file; but not the info pages, since this would break
1397 links between the various manuals.
1399 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1400 overwriting "emacs" in the installation bin/ directory with a link
1403 ** Emacs uses libtinfo in preference to libncurses, if available.
1405 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1406 /usr/pkg/lib to the linker search path. You must add them yourself if
1409 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1410 (from the bin and libexec directories, respectively). The former is
1411 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1414 * Startup Changes in Emacs 24.3
1416 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1417 lisp/ directory. There should not be any there anyway. If you have
1418 been adding them there, put them somewhere else; e.g., site-lisp.
1420 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1423 * Changes in Emacs 24.3
1427 *** `C-h f' (`describe-function') can now perform autoloading.
1428 When this command is called for an autoloaded function whose docstring
1429 contains a key substitution construct, that function's library is
1430 automatically loaded, so that the documentation can be shown
1431 correctly. To disable this, set `help-enable-auto-load' to nil.
1433 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1434 even after their associated libraries have been loaded (and the
1435 autoloads have been redefined as functions).
1439 *** Images displayed via ImageMagick now support transparency and the
1440 :background image specification property.
1442 *** When available, ImageMagick support is automatically enabled.
1443 It is no longer necessary to call `imagemagick-register-types'
1444 explicitly to install ImageMagick image types; that function is called
1445 automatically at startup, or when customizing an imagemagick- option.
1447 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1448 ImageMagick to view images. (You must call `imagemagick-register-types'
1449 afterwards if you do not use customize to change this.)
1451 *** The new variable `imagemagick-enabled-types' also affects which
1452 ImageMagick types are treated as images. The function
1453 `imagemagick-filter-types' returns the list of types that will be
1458 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1459 next and previous path separator, respectively.
1461 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1462 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1463 non-nil before enabling the mode.
1467 *** New option `mode-line-default-help-echo' specifies the help text
1468 (shown in a tooltip or in the echo area) for any part of the mode line
1469 that does not have its own specialized help text.
1471 *** You can now click mouse-3 in the coding system indicator to invoke
1472 `set-buffer-file-coding-system'.
1474 ** Server and client
1476 *** emacsclient now obeys string values for `initial-buffer-choice',
1477 if it is told to open a new frame without specifying any file to visit
1478 or expression to evaluate.
1480 *** New option `server-auth-key' specifies a shared server key.
1482 ** Emacs now generates backtraces on fatal errors.
1483 On encountering a fatal error, Emacs now outputs a textual description
1484 of the fatal signal, and a short backtrace on platforms like glibc
1485 that support backtraces.
1487 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1488 This minor mode replaces `toggle-read-only', which is now obsolete.
1490 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1491 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1492 respectively, without exiting from the prompt.
1494 ** In the Package Menu, newly-available packages are listed as "new",
1495 and sorted above the other "available" packages by default.
1497 ** If your Emacs was built from a repository checkout, the new variable
1498 `emacs-bzr-version' contains information about the bzr revision used.
1500 ** New option `create-lockfiles' specifies usage of lockfiles.
1501 It defaults to t. Changing it to nil inhibits the creation of lock
1502 files (use this with caution).
1504 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1505 variables on remote hosts.
1507 ** The entry for PCL-CVS has been removed from the Tools menu.
1508 The PCL-CVS commands are still available via the keyboard.
1510 ** Using "unibyte: t" in Lisp source files is obsolete.
1511 Use "coding: raw-text" instead.
1513 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1514 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1515 The previous binding, introduced in Emacs 24.1, was a mistake, because
1516 `C-c LETTER' bindings are reserved for user customizations.
1518 ** Internationalization
1520 *** New language environment: Persian.
1522 *** New input method `vietnamese-vni'.
1524 ** Nextstep (GNUstep / Mac OS X) port
1526 *** Support for fullscreen and the frame parameter fullscreen.
1528 *** A file dialog is used for open/save operations initiated from the
1532 * Editing Changes in Emacs 24.3
1534 ** Search and Replace
1536 *** Non-regexp Isearch now performs "lax" space matching.
1537 Each sequence of spaces in the supplied search string may match any
1538 sequence of one or more whitespace characters, as specified by the
1539 variable `search-whitespace-regexp'. (This variable is also used by a
1540 similar existing feature for regexp Isearch.)
1542 *** New Isearch command `M-s SPC' toggles lax space matching.
1543 This applies to both ordinary and regexp Isearch.
1545 *** New option `replace-lax-whitespace'.
1546 If non-nil, `query-replace' uses flexible whitespace matching too.
1549 *** Global `M-s _' starts a symbol (identifier) incremental search,
1550 and `M-s _' in Isearch toggles symbol search mode.
1551 `M-s c' in Isearch toggles search case-sensitivity.
1553 ** Navigation commands
1555 *** New binding `M-g c' for `goto-char'.
1557 *** New binding `M-g TAB' for `move-to-column'.
1559 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1560 interactively with no prefix arg. Previously, it moved to column 1.
1562 ** New option `yank-handled-properties' allows processing of text
1563 properties on yanked text, in ways that are more general than just
1564 removing them (as is done by `yank-excluded-properties').
1566 ** New option `delete-trailing-lines' specifies whether
1567 M-x delete-trailing-whitespace should delete trailing lines at the end
1568 of the buffer. It defaults to t.
1570 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1572 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1573 `ucs-insert' is now an obsolete alias for `insert-char'.
1575 ** The `z' key no longer has a binding in most special modes.
1576 It used to be bound to `kill-this-buffer', but `z' is too easy to
1579 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1580 It copies the region-rectangle as the last rectangle kill.
1584 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1586 *** New option `register-separator' specifies the register containing
1587 the text to put between collected texts for use with
1588 M-x append-to-register and M-x prepend-to-register.
1591 * Changes in Specialized Modes and Packages in Emacs 24.3
1593 ** Common Lisp emulation (CL)
1595 *** CL's main entry is now (require 'cl-lib).
1596 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1597 i.e., all its definitions have the "cl-" prefix (and internal definitions
1598 use the "cl--" prefix).
1600 If `cl' provided a feature under the name `foo', then `cl-lib'
1601 provides it under the name `cl-foo' instead; with the exceptions of the
1602 few `cl' definitions that had to use `foo*' to avoid conflicts with
1603 pre-existing Elisp entities. These have been renamed to `cl-foo'
1604 rather than `cl-foo*'.
1606 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1607 provide the old, non-prefixed names. Some exceptions are listed below:
1609 *** `cl-flet' is not like `flet' (which is deprecated).
1610 Instead it obeys the behavior of Common-Lisp's `flet'.
1611 In particular, in cl-flet function definitions are lexically scoped,
1612 whereas in flet the scoping is dynamic.
1614 *** `cl-labels' is slightly different from `labels'.
1615 The difference is that it relies on the `lexical-binding' machinery
1616 (as opposed to the `lexical-let' machinery used previously) to capture
1617 definitions in closures, so such closures will only work if `lexical-binding'
1620 *** `cl-letf' is not exactly like `letf'.
1621 The only difference is in details that relate to some deprecated usage
1622 of `symbol-function' in place forms.
1624 *** `progv' was rewritten to use the `let' machinery.
1625 A side effect is that variables without corresponding values are bound
1626 to nil rather than being made unbound.
1628 *** The following methods of extending `setf' are obsolete
1629 (use features from gv.el instead):
1630 `define-modify-macro' (use `gv-letplace')
1631 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1632 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1633 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1637 *** Changes are now highlighted using the same color scheme as in
1638 modern VCSes. Deletions are displayed in red (new faces
1639 `diff-refine-removed' and `smerge-refined-removed', and new definition
1640 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1641 and `smerge-refined-added', and new definition of `diff-added').
1643 *** The variable `diff-use-changed-face' defines whether to use the
1644 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1645 changes in context diffs.
1647 *** The new command `diff-delete-trailing-whitespace' removes trailing
1648 whitespace introduced by a diff.
1650 ** Ediff now uses the same color scheme as Diff mode.
1654 A new version of python.el, which provides several new features, including:
1655 per-buffer shells, better indentation, Python 3 support, and improved
1656 shell-interaction compatible with iPython (and virtually any other
1659 *** Some user options have been replaced/renamed, including (old -> new):
1660 **** python-indent -> python-indent-offset
1661 **** python-guess-indent -> python-indent-guess-indent-offset
1662 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1663 **** python-use-skeletons -> python-skeleton-autoinsert
1665 *** Some user options have been removed, including:
1667 **** `python-indent-string-contents': Strings are never indented.
1669 **** `python-honour-comment-indentation':
1670 Comments are always considered as indentation markers.
1672 **** `python-continuation-offset': Indentation is automatically
1673 calculated in a pep8 compliant way depending on the context.
1675 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1676 Have no direct mapping as the shell interaction is completely different.
1678 **** `python-python-command', `python-jython-command':
1679 Replaced by `python-shell-interpreter'.
1681 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1682 `python-pdbtrack-minor-mode-string', `python-source-modes':
1685 *** Some commands have been replaced (old -> new):
1686 **** python-insert-class -> python-skeleton-class
1687 **** python-insert-def -> python-skeleton-def
1688 **** python-insert-for -> python-skeleton-for
1689 **** python-insert-if -> python-skeleton-if
1690 **** python-insert-try/except -> python-skeleton-try
1691 **** python-insert-try/finally -> python-skeleton-try
1692 **** python-insert-while -> python-skeleton-while
1693 **** python-find-function -> python-nav-jump-to-defun
1694 **** python-next-statement -> python-nav-forward-sentence
1695 **** python-previous-statement -> python-nav-backward-sentence
1696 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1697 **** python-end-of-defun-function -> python-nav-end-of-defun
1698 **** python-send-buffer -> python-shell-send-buffer
1699 **** python-send-defun -> python-shell-send-defun
1700 **** python-send-region -> python-shell-send-region
1701 **** python-send-region-and-go -> emulate with python-shell-send-region
1702 and python-shell-switch-to-shell
1703 **** python-send-string -> python-shell-send-string
1704 **** python-switch-to-python -> python-shell-switch-to-shell
1705 **** python-describe-symbol -> python-eldoc-at-point
1709 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1711 *** The D-Bus object manager interface is implemented.
1713 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1714 if their value does not fit into Emacs's integer range.
1716 *** The function `dbus-call-method' is now non-blocking.
1717 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1719 *** Signals can also be sent as unicast messages.
1721 *** The argument list of `dbus-register-signal' has been extended,
1722 according to the new match rule types of D-Bus.
1724 *** `dbus-init-bus' supports private connections.
1726 *** There is a new function `dbus-setenv'.
1728 ** `desktop-path' no longer includes the "." directory.
1729 Desktop files are now located in ~/.emacs.d by default.
1733 *** `dired-do-async-shell-command' executes each file sequentially
1734 if the command ends in `;' (when operating on multiple files).
1735 Otherwise, it executes the command on each file in parallel.
1737 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1738 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1741 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1742 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1743 mark/unmark/flag all files in the active region.
1745 *** The minibuffer default for `=' (`dired-diff') has changed.
1746 It is now the backup file for the file at point, if one exists.
1747 In Transient Mark mode the default is the file at the active mark.
1749 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1750 The global binding for `M-=', `count-words-region' is in effect.
1754 *** New module "notifications", which can send a notification when you
1755 receive a private message or your nickname is mentioned.
1757 *** ERC will look up server/channel names via auth-source and use any
1760 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1761 only applies to messages sent by lurkers.
1763 ** reStructuredText mode
1765 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1766 fontification, comment handling, and customization have all been revised
1769 *** Support for `imenu' and `which-function-mode'.
1771 *** The reStructuredText syntax is more closely covered.
1772 Sphinx support has been improved.
1774 *** `rst-insert-list' inserts new list or continues existing lists.
1776 *** A negative prefix argument always works for `rst-adjust'.
1778 *** The window configuration is reset after displaying a TOC.
1780 *** The constant `rst-version' describes the rst.el package version.
1784 *** Support for percent literals and recognition of regular expressions
1785 in method calls without parentheses with more methods, including Cucumber
1788 *** Improved syntax highlighting and indentation.
1790 *** New command `ruby-toggle-block', bound to `C-c {'.
1792 *** Some non-standard keybindings/commands have been removed:
1794 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1796 **** `ruby-mark-defun'; use `mark-defun'.
1798 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1799 appropriate settings for the variables `beginning-of-defun-function'
1800 and `end-of-defun-function'.
1802 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1803 `reindent-then-newline-and-indent' and `newline' have been removed.
1805 ** Shell Script mode
1807 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1809 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1811 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1815 *** The free software compiler GHDL is supported (and now the default).
1817 *** Support for the VHDL-AMS packages has been added/updated.
1819 *** Updated to the 2002 revision of the VHDL standard.
1821 *** Accepts \r and \f as whitespace.
1825 *** The faces used by Apropos are now directly customizable.
1826 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1827 see the `apropos' Custom group for details.
1829 *** The old options whose values specified faces to use have been removed
1830 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1834 *** This package has been rewritten to use Tabulated List mode.
1836 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1837 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1841 *** Algebraic simplification mode is now the default.
1842 To restrict to the limited simplifications given by the former
1843 default simplification mode, use `m I'.
1847 *** You can customize the header text that appears above each calendar month.
1848 See the variable `calendar-month-header'.
1850 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1852 *** The calendars produced by cal-html include holidays.
1853 Customize `cal-html-holidays' to change this.
1857 *** The major modes from the parser generators "Bovine" and "Wisent"
1858 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1859 are in `auto-mode-alist', and the corresponding manuals are included.
1863 **** Menu support for the "Configuration" feature. This allows users to
1864 choose the active configuration (such as debug or install) from the menu.
1866 **** New command `ede-set' to interactively set project-local variables.
1868 **** Support for compiling, debugging, and running in "generic" projects.
1870 **** Autoconf editing support for M4 macros with complex arguments.
1872 **** Compilation support for the "linux" project type.
1874 **** "simple" projects have been removed; use "generic" projects instead.
1878 **** Support for parsing #include statements inside a namespace in C/C++.
1880 **** Improved support for 'extern "C"' declarations in C/C++.
1882 **** The ability to ignore more common special C/C++ preprocessor symbols,
1883 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1884 If available, include cdefs.h as an additional source of preprocessor symbols.
1886 **** Improved C/C++ function pointer parsing.
1888 **** In Python, support for converting imports to include file names.
1890 **** Ability to dynamically determine the Python load path.
1892 **** Support for the Python 'WITH' and 'AT' keywords.
1894 **** Improved tooltip completion.
1898 **** The SRecode manual is now included.
1900 **** Tag generation supports constructor/destructor settings and system
1901 include differentiation.
1903 **** Addition of 'Framework' support: Frameworks are specified when a
1904 particular kind of library (such as Android) is needed in a common language
1907 **** Support for nested templates and let variables override based on priority.
1909 **** Support for merging tables from multiple related modes, such as
1910 default -> c++ -> arduino.
1912 ** Compile has a new option `compilation-always-kill'.
1916 *** `custom-reset-button-menu' now defaults to t.
1918 *** Non-option variables are never matched in `customize-apropos' and
1919 `customize-apropos-options' (i.e., the prefix argument does nothing for
1920 these commands now).
1924 *** The variables `term-default-fg-color' and `term-default-bg-color'
1925 are now deprecated in favor of the customizable face `term'.
1927 *** You can customize how to display ANSI terminal colors and styles
1928 by customizing the corresponding `term-color-<COLOR>',
1929 `term-color-underline' and `term-color-bold' faces.
1933 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1935 *** Remote processes are now also supported on remote MS-Windows hosts.
1939 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1940 Previously, this slot stored semicolon-separated attribute-value pairs
1941 appended to some imap URLs, but this is not compatible with RFC 3986.
1942 So now the `filename' slot stores the entire path and query components,
1943 and the `attributes' slot is always nil.
1945 *** New function `url-encode-url' for encoding a URI string.
1946 The `url-retrieve' function now uses this to encode its URL argument,
1947 in case that is not properly encoded.
1949 ** notifications.el supports now version 1.2 of the Notifications API.
1950 The function `notifications-get-capabilities' returns the supported
1953 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1954 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1955 `flymake-warning-bitmap'.
1957 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1958 specifying URL types that should be converted to remote file names at
1959 the FFAP prompt. The default is now '("ftp").
1961 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1962 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1964 ** New option `mouse-avoidance-banish-position' specifies where the
1965 `banish' mouse avoidance setting moves the mouse.
1967 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1968 closing brackets to be aligned with the line of the opening bracket.
1970 ** In Proced mode, new command `proced-renice' renices marked processes.
1972 ** New option `async-shell-command-buffer' specifies the buffer to use
1973 for a new asynchronous `shell-command' when the default output buffer
1974 `*Async Shell Command*' is already in use.
1976 ** SQL mode has a new option `sql-db2-escape-newlines'.
1977 If non-nil, newlines sent to the command interpreter will be escaped
1978 by a backslash. The default does not escape the newlines and assumes
1979 that the sql statement will be terminated by a semicolon.
1981 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1982 (and modes that derive from it), sorts the column at point, or the Nth
1983 column if a numeric prefix argument is given.
1985 ** `which-func-modes' now defaults to t, so Which Function mode, when
1986 enabled, applies to all applicable major modes.
1988 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1991 ** Follow mode no longer works by using advice.
1992 The option `follow-intercept-processes' has been removed.
1994 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1996 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1997 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1998 *** semantic-change-hooks -> semantic-change-functions
1999 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2000 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2001 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2002 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2003 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2004 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2005 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2006 *** rcirc-activity-hooks -> rcirc-activity-functions
2007 *** rcirc-print-hooks -> rcirc-print-functions
2008 *** dbus-event-error-hooks -> dbus-event-error-functions
2009 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2010 *** checkdoc-style-hooks -> checkdoc-style-functions
2011 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2012 *** archive-extract-hooks -> archive-extract-hook
2013 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2014 *** hfy-post-html-hooks -> hfy-post-html-hook
2015 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2016 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2017 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2018 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2020 ** Obsolete packages
2023 In most cases, assoc+member+push+delq work just as well.
2024 And in any case it's just a terrible package: ugly semantics, terrible
2025 inefficiency, and not namespace-clean.
2034 * Incompatible Lisp Changes in Emacs 24.3
2036 ** Docstrings starting with `*' no longer indicate user options.
2037 Only variables defined using `defcustom' are considered user options.
2038 The function `user-variable-p' is now an obsolete alias for
2039 `custom-variable-p'.
2041 ** The return values of `defalias', `defun' and `defmacro' have changed,
2042 and are now undefined. For backwards compatibility, `defun' and
2043 `defmacro' currently return the name of the newly defined
2044 function/macro, but this should not be relied upon.
2046 ** `random' by default now returns a different random sequence in
2047 every Emacs run. Use `(random S)', where S is a string, to set the
2048 random seed to a value based on S, in order to get a repeatable
2049 sequence in later calls.
2051 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2052 that substring is inserted literally even if the LITERAL arg is
2053 non-nil, instead of causing an error to be signaled.
2055 ** `select-window' now always makes the window's buffer current.
2056 It does so even if the window was selected before.
2058 ** The function `x-select-font' can return a font spec, instead of a
2059 font name as a string. Whether it returns a font spec or a font name
2060 depends on the graphical library.
2062 ** `face-spec-set' no longer sets frame-specific attributes when the
2063 third argument is a frame (that usage was obsolete since Emacs 22.2).
2065 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2067 ** The CL package's `get-setf-method' function no longer exists.
2068 Generalized variables are now part of core Emacs Lisp, and implemented
2069 differently to the way cl.el used to do it. It is not possible to
2070 define a compatible replacement for `get-setf-method'. See the file
2071 gv.el for internal details of the new implementation.
2073 ** The arguments of `dbus-register-signal' are no longer just strings,
2074 but keywords or keyword-string pairs. The old argument list will
2075 still be supported for Emacs 24.x.
2077 ** Miscellaneous name changes
2078 Some Lisp symbols have been renamed to correct their spelling,
2079 or to be more consistent with standard Emacs terminology.
2081 *** Renamed functions
2082 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2083 **** inactivate-input-method -> deactivate-input-method
2084 **** quail-inactivate -> quail-deactivate
2085 **** robin-inactivate -> robin-deactivate
2086 **** viper-inactivate-input-method -> viper-deactivate-input-method
2087 **** viper-inactivate-input-method-action ->
2088 viper-deactivate-input-method-action
2089 **** ucs-input-inactivate -> ucs-input-deactivate
2092 The old hooks are still supported for backward compatibility, but they
2093 are deprecated and will be removed eventually.
2094 **** input-method-inactivate-hook -> input-method-deactivate-hook
2095 **** robin-inactivate-hook -> robin-deactivate-hook
2096 **** quail-inactivate-hook -> quail-deactivate-hook
2098 *** Renamed variables
2099 **** follow-deactive-menu -> follow-inactive-menu
2100 **** inactivate-current-input-method-function ->
2101 deactivate-current-input-method-function
2103 ** Some obsolete functions, variables, and faces have been removed:
2104 *** `last-input-char', `last-command-char', `unread-command-char'
2105 *** `facemenu-unlisted-faces'
2106 *** `rmail-decode-mime-charset'
2107 *** `iswitchb-read-buffer'
2108 *** `sc-version', `sc-submit-bug-report'
2109 *** `set-char-table-default'
2110 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2111 *** `compile-internal'
2113 *** `mode-line-inverse-video'
2114 *** `follow-mode-off-hook'
2115 *** `cvs-commit-buffer-require-final-newline'
2116 (use `log-edit-require-final-newline' instead)
2117 *** `cvs-changelog-full-paragraphs'
2118 (use `log-edit-changelog-full-paragraphs' instead)
2119 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2120 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2121 *** `vc-master-templates' (use `vc-handled-backends' instead)
2122 *** `vc-checkout-carefully'
2125 * Lisp Changes in Emacs 24.3
2127 ** CL-style generalized variables are now in core Elisp.
2128 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2129 You can define your own generalized variables using `gv-define-simple-setter',
2130 `gv-define-setter', etc.
2132 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2133 This can significantly speed up execution of non-byte-compiled code,
2134 but can also bump into previously unnoticed cyclic dependencies.
2135 These are generally harmless: they will simply cause the macro calls
2136 to be left for later expansion (as before), but will result in a
2137 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2138 You may wish to restructure your code so this does not happen.
2140 ** New sampling-based Elisp profiler.
2141 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2142 When finished, use M-x profiler-stop. The sampling rate can be based on
2143 CPU time or memory allocations.
2145 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2146 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2148 ** New macros `setq-local' and `defvar-local'.
2150 ** Face underlining can now use a wave.
2152 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2153 of `read-regexp' accepts a string ending with a colon and space, and its
2154 second argument DEFAULTS can be a list of strings accessible via `M-n'
2155 in the minibuffer ahead of other hard-coded useful regexp-related values.
2156 More commands use `read-regexp' now to read their regexp arguments.
2160 *** New function `completion-table-with-quoting' to handle completion
2161 in the presence of quoting, such as file completion in shell buffers.
2163 *** New function `completion-table-subvert' to use an existing completion
2164 table, but with a different prefix.
2168 *** New error type and new function `user-error'.
2169 These do not trigger the debugger.
2171 *** New option `debugger-bury-or-kill', saying what to do with the
2172 debugger buffer when exiting debug.
2174 *** Set `debug-on-message' to enter the debugger when a certain
2175 message is displayed in the echo area. This can be useful when trying
2176 to work out which code is doing something.
2178 *** New var `inhibit-debugger', automatically set to prevent accidental
2179 recursive invocations.
2183 *** New command `fit-frame-to-buffer' adjusts the frame height to
2186 *** The command `fit-window-to-buffer' can adjust the frame height
2187 if the new option `fit-frame-to-buffer' is non-nil.
2189 *** New macro `with-temp-buffer-window', similar to
2190 `with-output-to-temp-buffer'.
2192 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2195 *** New option `switch-to-buffer-preserve-window-point' to restore a
2196 window's point when switching buffers.
2198 *** New display action alist entries `window-height' and `window-width'
2199 specify the size of new windows created by `display-buffer'.
2201 *** New display action alist entry `pop-up-frame-parameters', if
2202 non-nil, specifies frame parameters to give any newly-created frame.
2204 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2205 tells display action functions to avoid changing which frame is
2208 *** New display action alist entry `previous-window', if non-nil,
2209 specifies window to reuse in `display-buffer-in-previous-window'.
2211 *** New display action functions `display-buffer-below-selected',
2212 and `display-buffer-in-previous-window'.
2214 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2215 now accept a third argument to avoid choosing the selected window.
2217 *** Additional values recognized for option `window-combination-limit'.
2219 *** The following variables are obsolete, as they can be replaced by
2220 appropriate entries in the `display-buffer-alist' function introduced
2222 **** `dired-shrink-to-fit'
2223 **** `display-buffer-reuse-frames'
2224 **** `display-buffer-function'
2225 **** `special-display-buffer-names'
2226 **** `special-display-frame-alist'
2227 **** `special-display-function'
2228 **** `special-display-regexps'
2232 *** `current-time-string' no longer requires that its argument's year
2233 must be in the range 1000..9999. It now works with any year supported
2234 by the underlying C implementation.
2236 *** `current-time' now returns extended-format time stamps
2237 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2238 PSEC is typically a multiple of 1000 on current machines. Other
2239 functions that use this format, such as `file-attributes' and
2240 `format-time-string', have been changed accordingly. Old-format time
2241 stamps are still accepted.
2243 *** The format of timers in `timer-list' and `timer-idle-list' is now
2244 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2245 The PSECS slot is new, and uses picosecond resolution. It can be
2246 accessed via the new `timer--psecs' accessor.
2248 *** Last-modified time stamps in undo lists now are of the form
2249 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2253 *** Improved security when handling persistent objects:
2255 **** `eieio-persistent-read' now features optional arguments for specifying
2256 the class to load, as well as a flag stating whether subclasses are allowed;
2257 if provided, other classes will be rejected by the reader. For
2258 compatibility with existing code, if the class is omitted only a
2261 **** New specialized reader for pulling in classes and signaling errors
2262 without evaluation of suspicious code.
2264 **** All slots that contain objects must have a :type. Slots with lists
2265 of objects must use a new type predicate for a list of an object type.
2267 *** Support for `find-function' and similar utilities, through the addition
2268 of filename support to generated symbols.
2270 ** Floating point functions now always return special values like NaN,
2271 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2272 Previously, they returned NaNs on some platforms but signaled errors
2273 on others. The affected functions are acos, asin, tan, exp, expt,
2274 log, log10, sqrt, and mod.
2276 ** New fringe bitmap `exclamation-mark'.
2278 ** Miscellaneous changes to special forms and macros
2280 *** `defun' and `defmacro' are now macros rather than special forms.
2282 *** `kbd' is now a function rather than a macro.
2284 ** Miscellaneous new functions
2286 *** `set-temporary-overlay-map' sets up a temporary keymap that
2287 takes precedence over most other maps for a short while (normally one key).
2289 *** `autoloadp' tests if its argument is an autoloaded object.
2291 *** `autoload-do-load' performs the autoloading operation.
2293 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2295 *** `file-name-base' returns a file name sans directory and extension.
2297 *** `function-get' fetches a function property, following aliases.
2299 *** `posnp' tests if an object is a `posn'.
2301 *** `system-users' returns the user names on the system.
2303 *** `system-groups' returns the group names on the system.
2305 *** `tty-top-frame' returns the topmost frame of a text terminal.
2307 ** The following functions and variables are obsolete:
2308 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2309 *** `buffer-has-markers-at'
2310 *** `macro-declaration-function' (use `macro-declarations-alist')
2311 *** `window-system-version' (provides no useful information)
2312 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2313 *** `query-replace-interactive'
2314 *** `font-list-limit' (has had no effect since Emacs < 23)
2317 * Changes in Emacs 24.3 on Non-Free Operating Systems
2319 ** Cygwin builds can use the native MS Windows user interface.
2320 Pass `--with-w32' to configure. The default remains the X11 interface.
2322 ** Two new functions are available in Cygwin builds:
2323 `cygwin-convert-file-name-from-windows' and
2324 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2325 code to access the Cygwin file-name mapping machinery to convert
2326 between Cygwin and Windows-native file and directory names.
2328 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2329 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2330 `mouse-autoselect-window'.
2332 ** On MS Windows Vista and later Emacs now supports symbolic links.
2334 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2335 support for libxml2, even if its presence is detected.
2337 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2339 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2340 directories to the search path. You must add them yourself if you want them.
2343 * Changes in Emacs 24.2
2345 ** This is mainly a bug-fix release.
2348 * Installation Changes in Emacs 24.1
2350 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2351 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2352 also depend on Gtk+. You can disable them with --without-rsvg and
2355 ** Emacs can be compiled with GnuTLS 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-gnutls'. See below for GnuTLS features.
2360 ** Emacs can be compiled with SELinux support.
2361 This happens by default if a suitably recent version of the library is
2362 found at build time. To prevent this, use the configure option
2363 `--without-selinux'. See below for SELinux features.
2365 ** Emacs can be compiled with ImageMagick support.
2366 This happens by default if a suitably recent version of the library is
2367 found at build time. To prevent this, use the configure option
2368 `--without-imagemagick'. See below for ImageMagick features.
2369 This feature is not available for the Nextstep or MS ports.
2371 ** Emacs can be compiled with libxml2 support.
2372 This happens by default if a suitably recent version of the library is
2373 found at build time. To prevent this, use the configure option
2374 `--without-xml2'. See below for libxml2 features.
2376 ** By default, the installed Info and man pages are compressed.
2377 You can disable this by configuring --without-compress-info.
2379 ** New configure option --with-wide-int.
2380 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2381 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2384 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2385 These provide no new functionality, they just remove the need to edit
2386 lib-src/Makefile by hand in order to use the associated features.
2388 ** New configure option --enable-use-lisp-union-type.
2389 This is only useful for Emacs developers to debug certain types of bugs.
2390 This is not a new feature; only the configure flag is new.
2392 ** The standalone programs digest-doc and sorted-doc are removed.
2393 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2395 ** The standalone program `fakemail' is removed.
2396 If you need it, feedmail.el provides a superset of the functionality.
2399 * Startup Changes in Emacs 24.1
2401 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2402 command line arguments, and the EMACS_UNIBYTE environment variable, no
2403 longer have any effect. (They were declared obsolete in Emacs 23.)
2405 ** New command line option `--no-site-lisp' removes site-lisp directories
2406 from load-path. -Q now implies this. This option does not affect the
2407 EMACSLOADPATH environment variable (and hence has no effect for
2411 * Changes in Emacs 24.1
2415 *** Many packages now use the `completion-at-point' command,
2416 rather than implementing separate completion commands.
2418 *** `completion-at-point' now handles tags and semantic completion.
2420 *** Completion in a non-minibuffer now tries to detect the end of completion
2421 and pops down the *Completions* buffer accordingly.
2423 *** New option `completion-cycle-threshold' allows completion cycling.
2425 *** New option `completion-category-overrides' for overriding the
2426 default completion style in certain circumstances.
2428 *** New completion style `substring'.
2430 *** Completion of buffer names uses `substring' completion by default.
2432 *** The option `widget-complete-field' has been removed.
2436 *** The first time you try sending mail, Emacs asks for a mail method.
2437 This is implemented by a new default for `send-mail-function', which
2438 is `sendmail-query-once'. This offers to use the smtpmail package, or
2439 to use the old defaults relying on external mail facilities
2440 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2441 `mailclient-send-it' on Windows).
2443 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2444 transfers the report to your desktop's preferred mail client, if there
2445 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2448 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2449 and Mail mode changes
2451 ** Emacs server and client changes
2453 *** New option `server-port' specifies the port for TCP Emacs servers.
2455 *** New emacsclient argument -q/--quiet suppresses some status messages.
2457 *** New emacsclient argument --frame-parameters specifies the frame
2458 parameters of any newly-created graphical frame.
2460 *** If emacsclient shuts down due to Emacs signaling an error,
2461 its exit status is 1.
2463 *** New emacsclient argument --parent-id ID.
2464 This opens a client frame in parent X window ID, via XEmbed, similar
2465 to the --parent-id argument to Emacs.
2467 ** Internationalization changes
2469 *** Emacs now supports display and editing of bidirectional text.
2470 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2471 displayed in the correct visual order as expected by users of those
2472 scripts. The display reordering is a "full bidirectionality" class
2473 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2474 with no RTL text should look exactly the same as before.
2476 **** New buffer-local variable `bidi-display-reordering'.
2477 To disable display reordering in a buffer, change this to nil.
2479 **** New buffer-local variable `bidi-paragraph-direction'.
2480 If nil (the default), Emacs determines the base direction of each
2481 paragraph from its text, as specified by the UBA. Setting the value
2482 to `right-to-left' or `left-to-right' forces a base direction on each
2485 Paragraphs with right-to-left base direction are displayed starting at
2486 the right window edge.
2488 *** Enhanced support for characters with no glyphs in available fonts,
2489 or, on text terminals, characters that cannot be encoded by the
2490 terminal coding system. The new option `glyphless-char-display-control'
2491 specifies how to display them: as a hexadecimal code in a box, a thin
2492 1-pixel space, an empty box, etc.
2494 *** New input methods for Farsi and Bulgarian
2495 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2497 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2498 (U+2010 and U+2011).
2500 *** New Hebrew translation of the Emacs Tutorial.
2501 Type `C-u C-h t' to choose it in case your language setup doesn't
2502 automatically select it.
2504 ** An Emacs Lisp package manager is now included.
2505 This is a convenient way to download and install additional packages,
2506 from a package repository at http://elpa.gnu.org.
2508 *** M-x list-packages shows a list of packages, which can be
2509 selected for installation.
2511 *** New command `describe-package', bound to `C-h P'.
2513 *** By default, all installed packages are loaded automatically when
2514 Emacs starts up. To disable this, set `package-enable-at-startup' to
2515 nil. To specify the packages to load, customize `package-load-list'.
2517 ** Custom theme changes
2519 *** New command `M-x customize-themes', which provides a convenient
2520 interface for enabling and disabling Custom themes.
2522 *** New option `custom-theme-load-path' is the load path for themes.
2523 Emacs no longer looks for Custom themes in `load-path'. The default
2524 value of `custom-theme-load-path' says to look for themes in
2525 `custom-theme-directory', followed by a subdirectory of
2526 `data-directory' named "themes/", which contains a small selection of
2527 built-in Custom themes.
2529 *** New option `custom-safe-themes' records known-safe theme files.
2530 If a theme is not in this list, Emacs queries before loading it, and
2531 offers to save the theme to `custom-safe-themes' automatically. By
2532 default, all themes included in Emacs are treated as safe.
2534 ** Improved GTK integration
2536 *** GTK scroll-bars are now placed on the right by default.
2537 The function `set-scroll-bar-mode' can change this.
2539 *** GTK tool bars can have just text, just images or images and text.
2540 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2541 the default is taken from desktop settings.
2543 *** GTK tool bars can be placed on any edge of the frame.
2544 The frame-parameter tool-bar-position controls this. It takes the
2545 values top, left, right or bottom. The Options => Show/Hide menu has
2548 *** The default colors for selected text (the `region' face) are taken
2549 from the GTK theme when Emacs is built with GTK.
2551 *** Emacs uses GTK tooltips by default if built with GTK.
2552 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2554 ** Graphical interface changes
2556 *** On graphical displays, the mode-line no longer ends in dashes.
2557 Also, the first dash (which does not indicate anything) is just
2558 displayed as a space.
2560 *** `menu-bar-select-buffer-function' lets you choose another operation
2561 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2563 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2564 built with Xft. These fonts can be set via X resources, for example:
2565 Emacs.pane.menubar.font: Courier-12
2569 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2570 or if it receives a SIGINT signal in batch mode.
2572 *** `kill-emacs-hook' is now also run in batch mode.
2573 Third-party code which adds to `kill-emacs-hook' should check if they
2574 do the right thing in batch mode.
2576 ** Scrolling changes
2578 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2579 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2580 of buffer at first key-press (instead they move to top/bottom of buffer)
2581 when `scroll-error-top-bottom' is non-nil.
2583 *** New option `scroll-error-top-bottom' (see above).
2585 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2586 scroll a line instead of full screen.
2588 *** New property `scroll-command' should be set on a command's symbol to
2589 define it as a scroll command affected by `scroll-preserve-screen-position'.
2591 *** If you customize `scroll-conservatively' to a value greater than 100,
2592 Emacs will never recenter point in the window when it scrolls due to
2593 cursor motion commands or commands that move point (e.f., `M-g M-g').
2594 Previously, you needed to use `most-positive-fixnum' as the value of
2595 `scroll-conservatively' to achieve the same effect.
2597 *** "Aggressive" scrolling now honors the scroll margins.
2598 If you customize `scroll-up-aggressively' or
2599 `scroll-down-aggressively' and move point off the window, Emacs now
2600 scrolls the window so as to avoid positioning point inside the scroll
2603 ** Basic SELinux support has been added.
2604 This requires Emacs to be linked with libselinux at build time.
2606 *** Emacs preserves the SELinux file context when backing up.
2607 Also, the function `copy-file' has an extra optional argument for
2608 preserving SELinux context, and the return value of `backup-buffer'
2609 now includes the SELinux context.
2611 *** New functions `file-selinux-context' and `set-file-selinux-context'
2612 get and set the SELinux context of a file.
2616 *** `delete-by-moving-to-trash' now only affects commands that specify
2617 trashing. This avoids inadvertently trashing temporary files.
2619 *** Calling `delete-file' or `delete-directory' with a prefix argument
2620 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2622 ** File- and directory-local variable changes
2624 *** You can stop directory local vars from applying to subdirectories.
2625 Add an element (subdirs . nil) to the alist portion of any variables
2626 settings to indicate that the section should not apply to
2629 *** Directory local variables can apply to some file-less buffers.
2630 Affected modes include dired, vc-dir, and log-edit. For example,
2631 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2632 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2633 `hack-dir-local-variables-non-file-buffer' to support this.
2635 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2636 Instead, use "eval: (minor-mode 1)".
2638 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2639 to `inhibit-local-variables-regexps'. As the name suggests, it now
2640 applies to ALL file local variables, not just -*- lines. The
2641 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2646 *** The `quit-window' command now restores the last buffer displayed
2647 in the quitted window.
2649 *** Resizing an Emacs frame now preserves proportional window sizes,
2650 modulo restrictions like window minimum sizes and fixed-size windows.
2652 *** The behavior of `display-buffer' is now customizable in detail.
2654 **** New option `display-buffer-base-action' specifies a list of
2655 user-determined display "actions" (functions and optional arguments
2656 for choosing the displaying window).
2658 This takes precedence over the default display action, which is
2659 specified by `display-buffer-fallback-action'.
2661 **** New option `display-buffer-alist' maps buffer name regexps to
2662 display actions, taking precedence over `display-buffer-base-action'.
2664 *** New option `window-combination-limit'.
2665 The new option `window-combination-limit' allows to return the space
2666 obtained for resizing or creating a window more reliably to the window
2667 from which such space was obtained.
2669 *** New option `window-combination-resize'.
2670 The new option `window-combination-resize' allows to split a window that
2671 otherwise cannot be split because it's too small by stealing space from
2672 other windows in the same combination. Subsequent resizing or deletion
2673 of the window will resize all windows in the same combination as well.
2675 *** New option `frame-auto-hide-function' lets you choose between
2676 iconifying or deleting a frame when burying a buffer in a dedicated
2677 frame, or quitting a window showing a buffer in a frame of its own.
2679 *** New commands `maximize-window' and `minimize-window'.
2680 These maximize and minimize the size of a window within its frame.
2682 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2683 These functions allow to navigate through the live buffers that have
2684 been shown in a specific window.
2686 ** Minibuffer changes
2688 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2689 This is handy for minibuffer-only frames, and is also used for the feature
2690 where mouse-1 pops up *Messages*"', which can now easily be changed.
2692 *** Minibuffers set `truncate-lines' to nil.
2693 If you want to change the value to something else, you could use
2694 for example `minibuffer-setup-hook'.
2696 ** `auto-mode-case-fold' is now enabled by default.
2698 ** `backup-by-copying-when-mismatch' now defaults to t.
2700 ** New basic faces `error', `warning', `success'.
2701 These are used to highlight text indicating failure, caution or
2702 successful operation.
2704 ** New option `list-colors-sort' defines the color sort order
2705 for `list-colors-display'.
2707 ** The variable `focus-follows-mouse' now always defaults to nil.
2710 * Editing Changes in Emacs 24.1
2714 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2715 `isearch-yank-line'.
2717 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2718 `isearch-yank-kill'.
2720 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2722 ** New commands `count-words-region' and `count-words'.
2724 *** M-= is bound to `count-words-region', not `count-lines-region'.
2725 The `count-words-region' command, when called interactively, reports
2726 the number of lines, words, and characters in the region. It is a
2727 superset of the old `count-lines-region', which is now an obsolete
2730 ** The command `just-one-space' (M-SPC), if given a negative argument,
2731 also deletes newlines around point.
2735 *** New option `delete-active-region'.
2736 If non-nil, [delete] and DEL delete the region if it is active and no
2737 prefix argument is given. If set to `kill', those commands kill
2740 *** New command `delete-forward-char', bound to [delete].
2741 This is meant for interactive use, and obeys `delete-active-region'.
2742 The command `delete-char' does not obey `delete-active-region'.
2744 *** `delete-backward-char' is now a Lisp function.
2745 Apart from obeying `delete-active-region', its behavior is unchanged.
2746 However, the byte compiler now warns if it is called from Lisp; Lisp
2747 callers should use delete-char with a negative argument instead.
2749 *** The option `mouse-region-delete-keys' has been deleted.
2751 ** Selection changes.
2753 The default handling of clipboard and primary selections has been
2754 changed to conform with modern X applications. In short, most
2755 commands for killing and yanking text now use the clipboard, while
2756 mouse commands use the primary selection.
2758 In the following, we provide a list of these changes, followed by a
2759 list of steps to get the old behavior back if you prefer that.
2761 *** `select-active-regions' now defaults to t.
2762 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2763 the kill ring. The selected text is put in the primary selection, if
2764 the system possesses a separate primary selection facility (e.g. X).
2766 **** `select-active-regions' also accepts a new value, `only'.
2767 This means to only set the primary selection for temporarily active
2768 regions (usually made by mouse-dragging or shift-selection);
2769 "ordinary" active regions, such as those made with C-SPC followed by
2770 point motion, do not alter the primary selection.
2772 **** `mouse-drag-copy-region' now defaults to nil.
2774 *** mouse-2 is now bound to `mouse-yank-primary'.
2775 This pastes from the primary selection, ignoring the kill-ring.
2776 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2778 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2780 *** `x-select-enable-primary' now defaults to nil.
2781 Thus, commands that kill text or copy it to the kill-ring (such as
2782 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2784 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2785 exactly equivalent to M-w, C-w, and C-y respectively.
2787 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2788 non-nil by default, as Windows does not support the primary selection
2789 between applications.
2791 *** To return to the previous behavior, do the following:
2793 **** Change `select-active-regions' to nil.
2794 **** Change `mouse-drag-copy-region' to t.
2795 **** Change `x-select-enable-primary' to t (on X only).
2796 **** Change `x-select-enable-clipboard' to nil.
2797 **** Bind `mouse-yank-at-click' to mouse-2.
2799 *** Support for X cut buffers has been removed.
2801 *** X clipboard managers are now supported.
2802 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2804 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2805 in the current rectangle. With a prefix argument, this prompts for a
2806 number to count from and for a format string.
2808 ** `redisplay-dont-pause' now defaults to t.
2809 This makes Emacs feel more responsive to editing commands that arrive
2810 at high rate, e.g. if you lean on some key, because stopping redisplay
2811 in the middle (when this variable is nil) forces more expensive
2812 updates later on, and Emacs appears to be unable to keep up.
2814 ** The behavior of <TAB> for active regions in Text mode has changed.
2815 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2816 when the region is active causes Emacs to indent all the lines in the
2817 region, aligning them with the line previous to the first line in the
2818 region (or with the left margin if there is no previous line).
2820 ** When `occur' is called with a prefix argument, matching strings are
2821 collected into the `*Occur*' buffer without line numbers. If there
2822 are parenthesized subexpressions in the specified regexp, `occur'
2823 reads replacement text that may contain \\& and \\N whose convention
2824 follows `replace-match'.
2827 * Changes in Specialized Modes and Packages in Emacs 24.1
2829 ** Archive Mode has basic support for browsing and updating 7z archives.
2833 *** BibTeX mode now supports biblatex.
2834 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2835 `bibtex-entry-field-alist' is now an obsolete alias for
2836 `bibtex-BibTeX-entry-alist'.
2838 *** New command `bibtex-search-entries', bound to C-c C-a.
2840 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2842 *** New variable `bibtex-search-entry-globally'.
2846 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2848 *** The default browser used by the package is now the "xdg-open" program,
2849 on platforms that support it. This calls your desktop's preferred browser.
2853 *** Support for musical notes.
2855 *** Support for logarithmic units.
2857 *** No longer uses the tex prefix for TeX specific unit names when
2858 using TeX or LaTeX mode.
2860 *** New option to highlight selections using faces.
2862 *** `calc-histogram' has the option of using a vector to determine the bins.
2864 *** New "O" option prefix.
2866 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2868 ** Calendar, Diary, and Appt
2870 *** Diary entries can contain non-printing "comments".
2871 See the variable `diary-comment-start'.
2873 *** Appointments can specify their individual warning times.
2874 See the variable `appt-warning-time-regexp'.
2876 *** The function specified by `appt-disp-window-function' may be passed
2877 lists of arguments if multiple appointments are due at similar times.
2878 If you are using a custom function for this, you should update it.
2880 *** New function `diary-hebrew-birthday'.
2882 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2883 may no longer be nil, but must all be strings.
2885 *** The obsolete (since Emacs 22.1) method of enabling the appt
2886 package by adding `appt-make-list' to `diary-hook' has been removed.
2887 Use `appt-activate' instead.
2889 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2890 appt-issue-message (use the function appt-activate)
2891 appt-visible/appt-msg-window (use the variable appt-display-format)
2893 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2894 view-diary-entries, list-diary-entries, show-all-diary-entries
2898 *** New feature to "guess" the style in an existing buffer.
2899 The main entry point is M-x c-guess.
2901 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2903 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2904 Thus C-M-a will, by default, go to the beginning of the immediate function,
2907 *** "Macros with semicolons" can be registered for correct indentation.
2908 Where such a macro ends a line (no semicolon) the next statement is no longer
2909 parsed as a statement continuation.
2911 ** Comint and modes derived from it use the standard completion code.
2915 *** Compilation mode can be used without Font Lock mode.
2916 `compilation-parse-errors-function' is now obsolete.
2918 *** New variable `compilation-filter-start', which is bound while
2919 `compilation-filter-hook' runs. It records the start position of the
2920 text inserted by `compilation-filter'.
2922 *** `compilation-error-screen-columns' and `compilation-first-column'
2923 are obeyed in the editing buffer. So programming language modes can
2924 set them, whereas previously only the value in the *Compilation*
2929 *** Customize buffers now contain a search field.
2930 The search is performed using `customize-apropos'.
2931 To turn off the search field, set `custom-search-field' to nil.
2933 *** Options in customize group buffers start out hidden if not customized.
2934 Use the arrow to the left of the option name to toggle visibility.
2936 *** custom-buffer-sort-alphabetically now defaults to t.
2938 *** The color widget now has a "Choose" button, which allows you to
2939 choose a color via `list-colors-display'.
2943 *** It is now possible to access buses other than the default system
2946 *** The `dbus-register-method' and `dbus-register-property' functions
2947 optionally do not register names.
2949 *** The new function `dbus-register-service' registers a known service
2950 name on a D-Bus without also registering a property or a method.
2954 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2955 if called with a prefix argument, read a file name from the minibuffer
2956 instead of using the current buffer.
2958 *** The "dired local variables" feature of Dired-x is obsolete.
2959 The standard directory local variables feature replaces it.
2963 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2964 controlling attempts to autojoin a channel.
2966 *** New variable `erc-coding-system-precedence': If we use `undecided'
2967 as the server coding system, this variable will then be consulted.
2968 The default is to decode strings that can be decoded as utf-8 as
2969 utf-8, and do the normal `undecided' decoding for the rest.
2973 *** The default value of `eshell-directory-name' has changed
2974 to be an "eshell" directory in `user-emacs-directory'.
2975 The old "~/.eshell/" directory is still used if it exists, though.
2979 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2980 It now supports multithread non-stop debugging and simultaneous
2981 debugging of several threads.
2985 *** RET (`image-toggle-animation') toggles animation, if applicable.
2986 Animation plays once, unless the option `image-animate-loop' is non-nil.
2990 *** New command M-x info-display-manual displays a named Info manual.
2991 If that manual is already visited in some Info buffer, it displays
2992 that buffer. (This is handy if you have many manuals in many *info*
2993 buffers, and don't remember the name of the buffer visiting the manual
2994 you want to consult.) Otherwise, it loads and displays the manual.
2996 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2997 This is for compatibility with the stand-alone Info reader program,
2998 and also because `Info-edit' is a rarely used command that is disabled
3001 ** Mail mode changes (not Message mode)
3003 *** New command M-x mail-add-attachment for adding MIME attachments
3005 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3006 (Its name is misleading, since it has nothing to do with MIME
3007 attachments.) The old name is now an obsolete alias to the new name.
3009 ** MH-E has been updated to MH-E version 8.3.1.
3010 See MH-E-NEWS for details.
3012 ** Modula-2 mode provides auto-indentation.
3014 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3016 ** nXML mode no longer binds C-RET to `nxml-complete'.
3017 Completion is now performed via `completion-at-point', bound to C-M-i
3018 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3019 default), this performs tag completion.
3021 ** Org mode has been updated to version 7.8.09.
3022 See ORG-NEWS for details.
3024 ** Prolog mode has been completely revamped, with lots of additional
3025 functionality such as more intelligent indentation, electricity,
3026 support for more variants, including Mercury, and a lot more.
3030 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3031 in the Rmail incoming message.
3033 *** The variable `rmail-message-filter' no longer has any effect.
3034 This change was made in Emacs 23.1 but was not advertised at the time.
3035 Try using `rmail-show-message-hook' instead.
3039 *** M-x shell prompts for the shell path name if the default directory
3040 is a remote file name and neither the environment variable $ESHELL nor
3041 the variable `explicit-shell-file-name' is set.
3043 *** TAB is now bound to the standard `completion-at-point' command,
3044 which now implements the pcomplete rules for shell command completion.
3048 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3049 if the mail server supports them. This uses either built-in GnuTLS
3050 support, or the starttls.el library. Customize `smtpmail-stream-type'
3053 *** The variable `smtpmail-auth-credentials' has been removed.
3054 By default, the information is now stored in the file ~/.authinfo.
3055 This was the default value of smtpmail-auth-credentials. If you had
3056 customized smtpmail-auth-credentials to a list of user names and
3057 passwords, those settings are not used. During your first connection
3058 to the smtp server, Emacs will prompt for the user name and password,
3059 and offer to save them to ~/.authinfo. Or you can manually copy the
3060 credentials to ~/.authinfo. For example, if you had
3062 (setq smtpmail-auth-credentials
3063 '(("mail.example.org" 25 "jim" "s!cret")))
3065 then the equivalent line in ~/.authinfo would be
3067 machine mail.example.org port 25 login jim password s!cret
3069 See the auth-source manual for more information, e.g. on encrypting
3070 the credentials file.
3072 *** The variable `smtpmail-starttls-credentials' has been removed.
3073 If you had that set, you need to put
3075 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3077 in your ~/.authinfo file instead.
3079 *** SMTPmail defaults to using the address in the From: header as the
3080 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3081 to the address you wish to use instead.
3085 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3086 and `sql-oracle-scan-on'.
3088 *** New options controlling prompting for login parameters.
3089 Each supported product has a custom variable `sql-*-login-params',
3090 which is a list of the parameters to be prompted for before a
3091 connection is established.
3093 *** The command `sql-product-interactive' now takes a prefix argument,
3094 which causes it to prompt for an SQL product.
3096 *** Product-specific SQL interactive commands now take prefix arguments.
3097 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3098 given a prefix argument, prompt for a name for the SQL interactive
3099 buffer. This reduces the need for calling `sql-rename-buffer'.
3101 *** SQL interactive modes suppress command continuation prompts, and
3102 replace tabs with spaces. The first change impacts multiple line SQL
3103 statements entered with C-j between each line, statements yanked into
3104 the buffer and statements sent with `sql-send-*' functions. The
3105 second prevents the MySQL and Postgres interpreters from listing
3106 object name completions when sent text via `sql-send-*' functions.
3108 *** New command `sql-connect' starts a predefined SQLi session,
3109 using the login parameters from `sql-connection-alist'.
3111 *** New "Save Connection" menu item in SQLi buffers.
3112 This gathers the login params specified for the SQLi session, if it
3113 was not started by a connection, and saves them as a new connection.
3115 *** New commands for listing database objects and details:
3116 sql-list-all and sql-list-table.
3118 *** An API for manipulating SQL product definitions has been added.
3122 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3126 *** New inline access method "ksu" (kerberized su).
3128 *** The following access methods are discontinued: "ssh1_old",
3129 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3131 *** The user option `remote-file-name-inhibit-cache' controls whether
3132 remote file attributes are cached for better performance.
3134 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3135 default value to "".
3137 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3138 for remote machines which support SELinux.
3140 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3141 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3142 the degree of parallelism.
3144 ** VC and related modes
3146 *** Support for pulling on distributed version control systems.
3147 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3148 supported (currently with Bzr, Git, and Mercurial), to update the
3149 current branch and working tree. A prefix argument means to prompt
3150 the user for specifics, e.g. a pull location.
3152 *** `vc-update' is now an alias for `vc-pull'.
3154 *** Support for merging on distributed version control systems.
3155 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3156 is supported (currently with Bzr, Git, and Mercurial), to merge
3157 changes from another branch into the current one. It prompts for
3158 specifics, e.g. a merge source.
3160 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3161 shows a diff while querying the user. It defaults to t.
3163 *** Log entries in some Log View buffers can be toggled to display a
3164 longer description by typing RET (log-view-toggle-entry-display).
3165 This is currently supported for Bzr, Git, and Mercurial (to support
3166 another backend, define a `log-view-expanded-log-entry-function').
3167 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3168 use this to display the full log entry for the revision at point.
3170 *** New command `vc-ediff' allows visual comparison of two revisions
3171 of a file similar to `vc-diff', but using ediff backend.
3173 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3174 this was not advertised at the time.
3176 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3177 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3178 this was not advertised at the time.
3184 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3186 *** partial-completion-mode (complete.el) is obsolete.
3187 You can get a comparable behavior with:
3188 (setq completion-styles '(partial-completion initials))
3189 (setq completion-pcm-complete-word-inserts-delimiters t)
3191 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3193 *** pgg is obsolete (use EasyPG instead).
3195 *** sregex.el is obsolete, since rx.el is a strict superset.
3197 *** s-region.el and pc-select.el are obsolete.
3198 They are superseded by shift-select-mode, enabled by default since 23.1.
3200 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3204 *** The Landmark game is now invoked with `landmark', not `lm'.
3205 Its functions and variables have been similarly renamed.
3207 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3208 (This interfered with cua-mode.)
3210 *** f90.el has some support for Fortran 2008 syntax.
3212 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3214 *** New command `nato-region' converts text to NATO phonetic alphabet.
3217 * New Modes and Packages in Emacs 24.1
3219 ** Occur Edit mode applies edits made in *Occur* buffers to the
3220 original buffers. It is bound to "e" in Occur mode.
3222 ** New global minor mode electric-pair-mode.
3223 When enabled, typing an open parenthesis automatically inserts the
3224 matching closing one.
3226 ** New global minor mode electric-indent-mode.
3227 When enabled, typing certain characters triggers reindentation.
3228 Major modes wishing to use this can set electric-indent-chars or
3229 electric-indent-functions.
3231 ** New global minor mode electric-layout-mode.
3232 When enabled, typing certain characters automatically inserts newlines.
3233 Major modes wishing to use this can set electric-layout-rules.
3235 ** tabulated-list.el provides a generic major mode for tabulated data,
3236 from which other modes can be derived.
3238 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3240 ** secrets.el is an implementation of the Secret Service API, an
3241 interface to password managers like GNOME Keyring or KDE Wallet. The
3242 Secret Service API requires D-Bus for communication. The command
3243 `secrets-show-secrets' offers a buffer with a visualization of the
3246 ** notifications.el provides an implementation of the Desktop
3247 Notifications API. It requires D-Bus for communication.
3249 ** soap-client.el supports access to SOAP web services from Emacs.
3250 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3252 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3254 ** New emacs-lock.el package.
3255 The previous version has been moved to obsolete/old-emacs-lock.el.
3256 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3257 against exiting Emacs and killing the buffer can be set separately.
3258 The mechanism for automatically turning off protection for buffers
3259 with dead inferior processes has been generalized.
3262 * Incompatible Lisp Changes in Emacs 24.1
3264 ** Passing a nil argument to a minor mode function call now ENABLES
3265 the minor mode unconditionally. This is so that you can write e.g.
3267 (add-hook 'text-mode-hook 'foo-mode)
3269 to enable foo-mode in Text mode buffers, removing the need for
3270 `turn-on-foo-mode' style functions. This affects all mode commands
3271 defined by `define-minor-mode'. If called interactively, the mode
3272 command still toggles the minor mode.
3274 ** The return value of `backup-buffer' has changed.
3275 It is now a list of three elements, where the second element is a list
3276 describing the original file's SELinux context. If Emacs or the
3277 system lacks SELinux support, the context list is (nil nil nil nil).
3278 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3280 ** `char-direction-table' and the `char-direction' function were deleted.
3281 They were buggy and inferior to the new support of bidirectional
3282 editing introduced in Emacs 24. If you need the bidirectional
3283 properties of a character, use `get-char-code-property' with the last
3284 argument `bidi-class'.
3286 ** `copy-directory' now copies the source directory as a subdirectory
3287 of the target directory, if the latter is an existing directory. The
3288 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3289 the contents directly into a pre-existing target directory.
3291 ** For mouse click input events in the text area, the Y pixel
3292 coordinate in the POSITION list now counts from the top of the text
3293 area, excluding any header line. Previously, it counted from the top
3296 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3297 been further reduced. Now a backquote not followed by a space is
3298 always treated as a "new-style" backquote. Please remove all
3299 "old-style" backquotes from your code. If your code uses backquotes
3300 as documented in the Elisp manual, and compiles without warning, then
3301 you have nothing to do in this regard. Code not following the
3302 appropriate conventions may fail to compile.
3304 The most common cause of trouble seems to be an old-style backquote
3305 followed by a newline. Another cause of trouble is vector notation
3306 for key sequence notation: instead of [(control ,)] and [(control ')],
3307 you should write [(control ?,)] and [(control ?')], which will work in
3310 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3311 was not advertised at the time. The function `custom-initialize-delay'
3312 replaced all known uses.
3314 ** `view-buffer' now treats special mode-class in the same way that
3315 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3316 major mode is special).
3318 ** Menu and tool bar changes
3320 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3321 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3322 With these alist entries omitted, `make-frame' checks the value of the
3323 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3324 a menu-bar or tool-bar, respectively. If the alist entries are added,
3325 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3327 *** The menu bar bindings's caches are not used any more.
3328 Use (where-is-internal <def> nil t) instead.
3330 ** Regions created by mouse dragging are now normal active regions,
3331 similar to those created by shift-selection (see Selection changes
3332 above). In previous Emacs versions, these regions were delineated by
3333 `mouse-drag-overlay'; that variable has been removed.
3335 ** The fourth argument of `filter-buffer-substring' has been removed.
3336 If you want to remove text properties from the final result, simply
3337 pass the result through substring-no-properties.
3339 ** cl.el no longer provides `cl-19'.
3341 ** The following obsolete functions and aliases have been removed
3342 (the appropriate new function is given in parentheses; "not needed"
3343 means you can just remove all calls to the function in question):
3345 *** `comint-kill-output' (`comint-delete-output')
3346 *** `decompose-composite-char' (`char-to-string')
3347 *** `outline-visible' (`outline-invisible-p')
3348 *** `internal-find-face' (`facep')
3349 *** `internal-get-face' (`facep and check-face')
3350 *** `frame-update-faces' (not needed)
3351 *** `frame-update-face-colors' (`frame-set-background-mode')
3352 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3353 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3354 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3355 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3356 *** `x-make-font-unbold' (`make-face-unbold')
3357 *** `x-make-font-unitalic' (`make-face-unitalic')
3358 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3359 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3360 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3361 *** `char-bytes' (== 1)
3362 *** `isearch-return-char' (`isearch-printing-char')
3363 *** `make-local-hook' (not needed)
3364 *** `set-screen-height' (`set-frame-height')
3365 *** `set-screen-width' (`set-frame-width')
3367 ** The following obsolete variables and varaliases have been removed
3368 (the appropriate new variable is given in parentheses):
3370 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3371 *** `vc-header-alist' (`vc-BACKEND-header')
3372 *** `directory-sep-char' (== ?/)
3373 *** `font-lock-defaults-alist' (`font-lock-defaults')
3374 *** `e' (`float-e').
3376 ** The following obsolete files were removed:
3377 sc.el, x-menu.el, rnews.el, rnewspost.el
3379 ** The format of the finder-inf.el file has changed, since the Finder
3380 mechanism is now based on the package system. The variable
3381 `finder-package-info' is replaced by `package--builtins' and
3382 `finder-keywords-hash'.
3384 ** When generating autoloads, `update-directory-autoloads' no longer
3385 assumes every inspected file is in your `load-path'. It instead
3386 generates relative names according to the current `load-path'.
3389 * Lisp Changes in Emacs 24.1
3391 ** Code can now use lexical scoping by default instead of dynamic scoping.
3392 The `lexical-binding' variable enables lexical scoping for local
3393 variables. It is typically set via a file-local variable in the first
3394 line of the file, in which case it applies to all the code in that
3397 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3398 binding instead of the old dynamic binding mode.
3400 *** Lexically scoped interpreted functions are represented with a new form
3401 of function value which looks like (closure ENV ARGS &rest BODY).
3403 *** New macro `letrec' to define recursive local functions.
3405 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3406 So do `defcustom' and other forms that call `defvar' as a subroutine.
3408 *** New function `special-variable-p' to check whether a variable is
3409 declared as dynamically bound.
3411 *** The form ((lambda ...) ...) is deprecated.
3413 ** An Emacs Lisp testing tool is now included.
3414 Emacs Lisp developers can use this tool to write automated tests for
3415 their code. See the ERT info manual for details.
3417 ** Changes for bidirectional display and editing
3419 *** New function `current-bidi-paragraph-direction'.
3420 This returns the base direction of the paragraph at point.
3422 *** New function `bidi-string-mark-left-to-right'.
3423 Given a string containing characters from right-to-left scripts, this
3424 function returns another string which can be safely inserted into a
3425 buffer, such that any following text will be always displayed to the
3426 right of that string. (This works by appending an invisible Unicode
3427 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3429 This is useful when the buffer has overall left-to-right paragraph
3430 direction and you need to insert a string whose contents are not known
3431 in advance, without disrupting the layout of the line.
3435 *** Window tree functions are accessible in Elisp.
3436 Functions are provided to return the parent, siblings or child windows
3437 of any window including internal windows (windows not associated with a
3438 buffer) in the window tree.
3440 **** New function `window-valid-p' gives non-nil for live and internal
3443 **** Window manipulation can deal with internal windows.
3444 Many window handling functions like `split-window', `delete-window', or
3445 `delete-other-windows' as well as the window resizing functions can now
3446 act on any window including internal ones.
3448 *** window-total-height/-width vs window-body-height/-width.
3449 The function `window-height' has been renamed to `window-total-height'
3450 and `window-width' has been renamed to `window-body-width'. The old
3451 names are provided as aliases. Two new functions `window-total-width'
3452 and `window-body-height' are provided.
3454 *** Window parameters specific to window handling functions.
3455 For each window you can specify a parameter to override the default
3456 behavior of a number of functions like `split-window', `delete-window'
3457 and `delete-other-windows'. The variable `ignore-window-parameters'
3458 allows to ignore processing such parameters.
3460 *** New semantics of third argument of `split-window'.
3461 The third argument of `split-window' has been renamed to SIDE and can be
3462 set to any of the values 'below, 'right, 'above, or 'left to make the
3463 new window appear on the corresponding side of the window that shall be
3464 split. Any other value of SIDE will cause `split-window' to split the
3465 window into two side-by-side windows as before.
3467 *** Window resizing functions.
3468 A new standard function for resizing windows called `window-resize' has
3469 been introduced. This and all other functions for resizing windows no
3470 longer delete any windows when they become too small.
3472 *** Deleting the selected window now selects the most recently selected
3473 live window on that frame instead.
3475 *** `adjust-window-trailing-edge' adjustments.
3476 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3477 is able to resize other windows if a window adjacent to the trailing
3478 edge cannot be shrunk any more. This makes its behavior more similar to
3479 that of Emacs 21 without compromising, however, its inability to delete
3480 windows which was introduced in Emacs 22.
3482 *** Window-local buffer lists.
3483 Windows now have local buffer lists. This means that removing a buffer
3484 from display in a window will preferably show the buffer previously
3485 shown in that window with its previous window-start and window-point
3486 positions. This also means that the same buffer may be automatically
3487 shown twice even if it already appears in another window.
3489 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3490 which if non-nil requires the buffer to be displayed in the currently
3491 selected window, signaling an error otherwise. If nil, another window
3492 can be used, e.g. if the selected one is strongly dedicated.
3494 *** `split-window-vertically' and `split-window-horizontally' renamed
3495 to `split-window-below' and `split-window-right' respectively.
3496 The old names are kept as aliases.
3500 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3501 named ACTION, and takes a display action of the same form as
3502 `display-buffer-base-action' (see Changes, above). A non-nil,
3503 non-list value is treated specially, as the old meaning.
3505 **** New variable `display-buffer-overriding-action'.
3507 **** The procedure of `display-buffer' etc. to choose a window is
3508 determined by combining `display-buffer-overriding-action',
3509 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3510 and `display-buffer-fallback-action'. The second and fourth of these
3511 are user-customizable variables.
3513 See the docstring of `display-buffer' for details.
3515 *** New functions `window-state-get' and `window-state-put'.
3516 These functions allow to save and restore the state of an arbitrary
3517 frame or window as an Elisp object.
3521 *** New variable `completion-extra-properties' used to specify extra
3522 properties of the current completion:
3523 - :annotate-function, same as the old completion-annotate-function.
3524 - :exit-function, function to call after completion took place.
3526 *** Functions on `completion-at-point-functions' can return any of the
3527 properties valid for `completion-extra-properties'.
3529 *** `completion-annotate-function' is obsolete.
3531 *** New `metadata' method for completion tables. The metadata thus returned
3532 can specify various details of the data returned by `all-completions':
3533 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3534 used to select a style in completion-category-overrides.
3535 - `annotation-function' to add annotations in *Completions*.
3536 - `display-sort-function' to specify how to sort entries in *Completions*.
3537 - `cycle-sort-function' to specify how to sort entries when cycling.
3539 *** `minibuffer-local-filename-must-match-map' is not used any more.
3540 Instead, the bindings in `minibuffer-local-filename-completion-map'
3541 are combined with `minibuffer-local-must-match-map'.
3543 *** New variable `completing-read-function' allows overriding the
3544 behavior of `completing-read'.
3546 ** `glyphless-char-display' can now distinguish between graphical and
3547 text terminal display, via a char-table entry that is a cons cell.
3549 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3550 Instead, the offending function is removed.
3554 *** New function `run-hook-wrapped' for running an abnormal hook by
3555 passing the hook functions as arguments to a "wrapping" function.
3556 Like `run-hook-with-args-until-success', it stops at the first
3557 non-nil return value.
3559 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3560 set of "wrapping" filters, similar to around advice.
3561 (A version of this macro was actually added in Emacs 23.2 but was not
3562 advertised at the time.)
3566 *** New macro `condition-case-unless-debug' (this was actually added in
3567 Emacs 23.1 as condition-case-no-debug, but not advertised)
3569 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3571 *** Variable `stack-trace-on-error' removed.
3573 *** The debugger can now "continue" from an error, which means it will
3574 jump to the error handler as if the debugger had not been invoked
3575 instead of jumping all the way to the top-level.
3577 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3578 This can be useful when `inhibit-quit' is set.
3580 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3581 named Emacs server instances.
3583 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3584 to redirect STDOUT to a file.
3586 ** The function `format-time-string' now supports the %N directive,
3587 for higher-resolution time stamps.
3589 ** New input reading functions
3591 *** New function `read-char-choice' reads a restricted set of
3592 characters, discarding any inputs not inside the set.
3594 *** The command `read-color' now requires a match for a color name
3595 or RGB triplet, instead of signaling an error if the user provides
3598 **** `facemenu-read-color' is now an alias for `read-color'.
3600 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3601 The variable is now used to load all kind of supported dynamic libraries,
3602 not just image libraries. The previous name is still available as an
3605 ** Syntax parsing changes
3607 *** New variable `syntax-propertize-function'.
3608 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3609 This allows syntax-table properties to be set independently from font-lock:
3610 just call syntax-propertize to make sure the text is propertized.
3611 Together with this new variable come a new hook
3612 syntax-propertize-extend-region-functions, as well as two helper functions:
3613 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3614 as-is; and syntax-propertize-rules which provides a new way to specify
3617 *** Syntax tables support a new "comment style c" additionally to style b.
3619 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3621 ** frame-local variables cannot be let-bound any more.
3623 ** Major and minor mode changes
3625 *** `set-auto-mode' now respects mode: local variables at the end of files,
3626 as well as those in the -*- line.
3628 *** `prog-mode' is a new major mode from which programming modes
3631 **** `prog-mode-hook' can be used to enable features for programming
3632 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3633 on-the-fly spell checking for comments and strings.
3635 *** New hook `change-major-mode-after-body-hook', run by
3636 `run-mode-hooks' just before any other mode hooks.
3638 *** Enabled globalized minor modes can be disabled in specific major modes.
3639 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3640 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3642 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3644 ** File-handling changes
3646 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3647 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3648 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3649 argument is supplied (see Trash changes, above).
3651 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3653 ** Tool-bars can display separators.
3654 Tool-bar separators are handled like menu separators in menu-bar maps,
3655 i.e. via menu entries of the form `(menu-item "--")'.
3659 *** Animated images support (currently animated gifs only).
3661 **** `image-animated-p' returns non-nil if an image can be animated.
3663 **** `image-animate' animates a supplied image spec.
3665 **** `image-animate-timer' returns the timer object for an image that
3668 *** `image-extension-data' has been renamed to `image-metadata'.
3669 The old name is an obsolete alias to the new one.
3671 *** Image mode can view any image type that ImageMagick supports.
3672 This requires Emacs to be built with ImageMagick support.
3674 **** New function `imagemagick-types', defined if ImageMagick support
3675 is enabled, returns a list of image file extensions that your
3676 ImageMagick installation supports.
3678 **** New function `imagemagick-register-types' enables ImageMagick
3679 image types in Image mode and in `create-image' and other helper
3682 **** New option `imagemagick-types-inhibit' excludes certain
3683 ImageMagick image types from `imagemagick-register-types'.
3685 **** With ImageMagick support, there are extra Image mode commands to
3686 resize and rotate images: `image-transform-fit-to-height',
3687 `image-transform-fit-to-width', `image-transform-set-rotation', and
3688 `image-transform-set-scale'.
3690 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3691 passes it to the mail user agent function. This argument specifies an
3692 action for returning to the caller after finishing with the mail. For
3693 example, this is used by Rmail to optionally delete a mail window.
3695 ** XML and HTML parsing
3696 If Emacs is compiled with libxml2 support, there are two new
3697 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3698 and `libxml-parse-xml-region' (which parses XML). Both return an
3699 Emacs Lisp parse tree.
3701 ** Networking and encryption changes
3703 *** `open-network-stream' can now be used to open an encrypted stream.
3704 It now accepts an optional `:type' parameter for initiating a TLS
3705 connection, directly or via STARTTLS. To do STARTTLS, additional
3706 parameters (`:end-of-command', `:success', `:capabilities-command')
3707 must also be supplied.
3709 *** New library gnutls.el.
3710 The new function `gnutls-available-p' returns non-nil if Emacs is
3711 built with GnuTLS support. The main entry points are
3712 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3713 these functions through `open-network-stream', because that can
3714 upgrade connections through STARTTLS opportunistically or use plain
3715 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3718 *** New primitive `secure-hash' that supports many secure hash algorithms:
3719 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3720 sha1.el has been removed. The `sha1' feature is provided by default.
3724 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3726 ** Progress reporters can now "spin".
3727 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3728 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3729 time you call `progress-reporter-update' on that progress reporter,
3730 with a nil or omitted VALUE argument, the reporter message is
3731 displayed with a "spinning bar".
3733 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3734 being reverted, even if the buffer has a local `revert-buffer-function'.
3736 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3737 If delayed-warnings-list is non-nil, the command loop calls
3738 `delayed-warnings-hook' after `post-command-hook'. At present, this
3739 is only used by Emacs on some platforms to display warnings during
3740 startup, which might otherwise not be noticed. This uses the
3741 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3743 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3745 ** New function `make-composed-keymap' that constructs a new keymap
3746 from multiple input maps. You can use this to make a keymap that
3747 inherits from multiple maps, eg:
3748 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3750 ** New function `string-prefix-p'.
3751 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3753 ** New reader macro ## that stands for the empty symbol.
3754 This means that the empty symbol can now be read back. Also, #: by itself
3755 (when not immediately followed by a possible symbol character) stands for
3756 an empty uninterned symbol.
3758 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3760 ** The following functions and variables are obsolete:
3762 *** `tooltip-use-echo-area' is obsolete.
3763 Rather than setting this to t, disable Tooltip mode instead.
3765 *** buffer-substring-filters is obsolete.
3766 Use `filter-buffer-substring-functions' instead.
3768 *** `byte-compile-disable-print-circle' is obsolete.
3770 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3771 Use `post-command-hook' instead.
3773 *** `font-lock-maximum-size' is obsolete.
3776 * Changes in Emacs 24.1 on Non-Free Operating Systems
3778 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3779 and also when HOME is set to C:\ by default.
3781 ** New configure.bat options
3783 *** --enable-checking builds Emacs with extra runtime checks.
3785 *** --distfiles specifies files to be included in binary distribution.
3787 *** --without-gnutls disables automatic GnuTLS detection.
3789 *** --lib for general library linkage, works with the USER_LIBS build variable.
3791 ** New make target `dist' to create binary distribution for MS Windows.
3793 ** The Lisp function `w32-default-color-map' is now obsolete.
3794 (It is only used internally in the Emacs C code.)
3796 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3797 reappear on mouse-over. (Requires OS X 10.6 or later.)
3799 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3800 other platforms, rather than inserting its contents into the buffer.
3803 ----------------------------------------------------------------------
3804 This file is part of GNU Emacs.
3806 GNU Emacs is free software: you can redistribute it and/or modify
3807 it under the terms of the GNU General Public License as published by
3808 the Free Software Foundation, either version 3 of the License, or
3809 (at your option) any later version.
3811 GNU Emacs is distributed in the hope that it will be useful,
3812 but WITHOUT ANY WARRANTY; without even the implied warranty of
3813 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3814 GNU General Public License for more details.
3816 You should have received a copy of the GNU General Public License
3817 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3822 paragraph-separate: "[
\f]*$"