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 documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
31 FIXME? Should be --without-acl?
33 ** Emacs can now be compiled with file notification support.
34 This happens by default if a suitable system library is found at
35 build time. To prevent this, use the configure option
36 `--without-file-notification'. See below for file-notify features.
37 FIXME? This feature is not available for the Nextstep port. (?)
40 ** The configure option `--without-compress-info' has been generalized,
41 and renamed to `--without-compress-install'. It now prevents compression
42 of _any_ files during installation.
45 ** The configure option `--with-crt-dir' has been removed.
46 It is no longer needed, as the crt*.o files are no longer linked specially.
49 ** Directories passed to configure option `--enable-locallisppath' are
50 no longer created during installation.
52 ** Emacs can be compiled with zlib support.
53 If this library is present (which it normally is on most systems), the
54 function `zlib-decompress-region' becomes available, which can
55 decompress gzip- and zlib-format compressed data.
58 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
59 This requires pkg-config to be available at configure time.
62 * Startup Changes in Emacs 24.4
65 ** When initializing `load-path', an empty element in the EMACSLOADPATH
66 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
67 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
68 load-path (the one that would have been used if EMACSLOADPATH was unset).
69 This makes it easier to _extend_ the load-path via EMACSLOADPATH
70 (previously, EMACSLOADPATH had to specify the complete load-path,
71 including the defaults). (In older versions of Emacs, an empty element
72 was replaced by ".", so use an explicit "." now if that is what you want.)
75 ** The -L option, which normally prepends its argument to load-path,
76 will instead append, if the argument begins with `:' (or `;' on MS Windows;
77 i.e., `path-separator').
80 ** If you use either site-load.el or site-init.el to customize the dumped
81 Emacs executable, any changes to `load-path' that these files make
82 will no longer be present after dumping. To affect a permanent change
83 to `load-path', use the `--enable-locallisppath' option of `configure'.
86 ** The user option `initial-buffer-choice' can now specify a function
87 to set up the initial buffer.
90 * Changes in Emacs 24.4
93 ** New option `gnutls-verify-error', if non-nil, means that Emacs
94 should reject SSL/TLS certificates that GnuTLS determines as invalid.
95 (This option defaults to nil at present, but this is expected to change
99 ** Emacs now supports menus on text-mode terminals.
100 If the terminal supports a mouse, clicking on the menu bar, or on
101 sensitive portions of the mode line or header line, will drop down the
102 menu defined at that position. Likewise, clicking C-mouse-2 or
103 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
106 If the text terminal does not support a mouse, you can activate the
107 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
109 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
110 customize the option `tty-menu-open-use-tmm' to a non-nil value.
111 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
115 ** The *Messages* buffer is created in `messages-buffer-mode',
116 a new major mode, with read-only status. Any code that might create
117 the *Messages* buffer should call the function `messages-buffer' to do
118 so and set up the mode.
120 ** Emacs now supports ACLs (access control lists).
122 *** Emacs preserves the ACL entries of files when backing up.
124 *** New functions `file-acl' and `set-file-acl' get and set the ACL
125 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
126 libacl. On MS-Windows, the NT Security APIs are used to emulate the
127 POSIX ACL interfaces.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as if they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
144 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
145 You can change the default by customizing `blink-cursor-blinks'.
148 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
149 This affects View mode, etc.
154 *** The command `apropos-variable' is renamed to `apropos-user-option'.
155 `apropos-user-option' shows all user options while `apropos-variable'
156 shows all variables. When called with a universal prefix argument,
157 the two commands swap their behaviors. When `apropos-do-all' is
158 non-nil, they output the same results.
161 *** The key `?' now describes prefix bindings, like `C-h'.
164 *** The command `describe-function' has been extended for EIEIO.
165 Running it on constructors will show a full description of the
166 generated class. For generic functions, it will show all
167 implementations together with links to the source. The old commands
168 `describe-class', `describe-constructor' and `describe-generic' were
172 *** The function `quail-help' is no longer an interactive command.
173 Use `C-h C-\' (`describe-input-method') instead.
178 *** ImageMagick images now support the :max-width and :max-height keywords.
181 *** When using `create-image' with image data, you can pass a :format
182 attribute (via the property-list argument) in order to help
183 ImageMagick detect the image type. The value should be a MIME
184 content-type that is found in the new variable `image-format-suffixes'.
186 ** Frame and window changes
189 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
190 bound to <f11> and M-<f10>, respectively.
193 *** New hooks `focus-in-hook', `focus-out-hook'.
194 These are normal hooks run when an Emacs frame gains or loses input focus.
197 *** Emacs can now draw dividers between adjacent windows.
198 To put dividers between side-by-side/vertically stacked windows
199 customize the frame parameter `right-divider-width'/`bottom-divider-width'
200 to some positive integer. You can drag dividers with the mouse
201 (they show a corresponding cursor when the mouse hovers over them).
202 You can change the appearance of dividers by customizing the faces
203 `window-divider', `window-divider-first-pixel', and
204 `window-divider-last-pixel'. The last two are useful to provide a 3D
205 effect, or to better distinguish dividers from surrounding display objects.
208 *** `split-window' is now a non-interactive function, not a command.
209 As a command, it was a special case of `C-x 2' (`split-window-below'),
210 and as such superfluous. After being reimplemented in Lisp, its
211 interactive form was mistakenly retained.
214 *** New option `scroll-bar-adjust-thumb-portion'.
215 Available only on X, this option allows to control over-scrolling
216 using the scroll bar (i.e. dragging the thumb down even when the end
217 of the buffer is visible).
219 ** Lisp evaluation changes
221 *** `eval-defun' on an already defined defcustom calls the :set function,
225 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
226 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
227 zero prefix argument. This disables truncation of lists in the output,
228 equivalent to setting `(eval-expression-)print-length' and
229 `(eval-expression-)print-level' to nil. Additionally, it causes integers
230 to be printed in other formats (octal, hexadecimal, and character).
233 *** New hook `eval-expression-minibuffer-setup-hook' run by
234 `eval-expression' on entering the minibuffer.
237 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
240 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
241 because it affects caching of paragraph scanning results as well.
242 There is no reason to set this to nil except for debugging purposes.
245 ** The option `set-mark-default-inactive' has been deleted.
246 This unfinished feature was introduced by accident in Emacs 23.1;
247 simply disabling Transient Mark mode does the same thing.
250 ** The default value of `comment-use-global-state' is now t,
251 and this variable has been marked obsolete.
254 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
255 and works for git too, if you fetch the repository notes.
258 ** New option `load-prefer-newer' affects how the `load' function chooses
259 the file to load. If this is non-nil, then when both .el and .elc
260 versions of a file exist, and the caller did not explicitly specify
261 which one to load, then the newer file is loaded. The default, nil,
262 means to always load the .elc file.
265 * Editing Changes in Emacs 24.4
267 ** Indentation changes
270 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
271 When invoked without a prefix argument, it now activates a transient
272 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
273 the text indentation in the region. Typing any other key resumes
274 normal editing behavior.
276 *** `electric-indent-mode' is enabled by default.
279 *** `tab-stop-list' is now implicitly extended to infinity by repeating
280 the last step. Its default value is changed to nil, which means a tab
281 stop every `tab-width' columns.
284 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
285 When called in succession, it cycles between spacing conventions:
286 one space, no spaces, original spacing.
289 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
290 a line after a one-letter word, which is an error in some typographical
291 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
294 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
296 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
297 Most commands are still unaware of it, but kill/yank do work on the rectangle.
300 ** New option `visual-order-cursor-movement'.
301 If this is non-nil, cursor motion with arrow keys will follow the
302 visual order of characters on the screen: <left> always moves to the
303 left, <right> always moves to the right, disregarding the surrounding
304 bidirectional context.
309 *** All interactive commands that read a register (`copy-to-register', etc.)
310 now display a temporary window after `register-preview-delay' seconds
311 that summarizes existing registers. To disable this, set that option to nil.
312 Interactive commands that read registers and want to make use of this
313 should use `register-read-with-preview' to read register names.
315 *** New command `frameset-to-register' bound to `C-x r f', replacing
316 `frame-configuration-to-register'. It offers similar functionality,
317 plus enhancements like the ability to restore deleted frames.
318 (`frame-configuration-to-register' still exists, but no longer has a
322 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
326 ** New command `delete-duplicate-lines'.
327 This searches the region for identical lines, and removes all but one
328 copy of each repeated line. The lines need not be sorted.
331 * Changes in Specialized Modes and Packages in Emacs 24.4
334 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
336 ~/.emacs.d/timelog replaces ~/.timelog
337 ~/.emacs.d/vip replaces ~/.vip
338 ~/.emacs.d/viper replaces ~/.viper
339 ~/.emacs.d/ido.last replaces ~/.ido.last
340 ~/.emacs.d/kkcrc replaces ~/.kkcrc
341 ~/.emacs.d/quickurls replaces ~/.quickurls
342 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
343 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
344 ~/.emacs.d/places replaces ~/.emacs-places
345 ~/.emacs.d/shadows replaces ~/.shadows
346 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
347 ~/.emacs.d/strokes replaces ~/.strokes
348 ~/.emacs.d/notes replaces ~/.notes
349 ~/.emacs.d/type-break replaces ~/.type-break
350 Also the following files used by the now obsolete otodo-mode.el:
351 ~/.emacs.d/todo-do replaces ~/.todo-do
352 ~/.emacs.d/todo-done replaces ~/.todo-done
353 ~/.emacs.d/todo-top replaces ~/.todo-top
355 ** Backtrace and debugger
358 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
359 display of local variables of the current stack frame.
361 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
362 the lexical environment when evaluating the code in the context at point
363 (and so allows you to access lexical variables).
366 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
369 ** Battery information can now be retrieved from BSD's `apm' utility.
372 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
374 ** Calendar and Diary
377 *** New faces `calendar-weekday-header', `calendar-weekend-header',
378 and `calendar-month-header'.
381 *** New option `calendar-day-header-array'.
384 *** New variable `diary-from-outlook-function', used by the command
385 `diary-from-outlook'.
388 *** The variable `calendar-font-lock-keywords' is obsolete.
393 *** Calc by default now uses the Gregorian calendar for all dates, and
394 uses January 1, 1 AD as its day number 1. Previously Calc used the
395 Julian calendar for dates before September 14, 1752, and it used
396 December 31, 1 BC as its day number 1; the new scheme is more
397 consistent with Calendar's calendrical system and day numbering.
400 *** The new option `calc-gregorian-switch' lets you configure if
401 (and when) Calc switches from the Julian to the Gregorian calendar.
404 *** Support for ISO 8601 dates.
410 **** The cpp-root project now supports executing a compile command.
411 It can be set through the new :compile-command slot or the
412 buffer-local variable `compile-command'.
414 **** Better selection of include directories for the 'linux' project.
415 Include directories now support out-of-tree build directories and
416 target architecture auto-detection.
420 **** Improved detection of used namespaces in current scope in C++.
422 **** Parsing of default values for variables and function arguments in C/C++.
423 They are also displayed by the summarize feature in the mode line.
425 **** Improved parsing of function pointers in C/C++.
426 This also includes parsing of function pointers as function arguments.
428 **** Parsing of C/C++ preprocessor macros that open new scope.
429 For example, this enables parsing of macros that open new namespaces.
431 **** Support for 'this' pointer in inline member functions in C++.
436 *** New macro `cl-tagbody'.
437 This executes statements while allowing for control transfer to labels.
440 *** letf is now just an alias for cl-letf.
445 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
446 Hence, you can now enable it independently from those modes, and from
447 `transient-mark-mode'.
450 *** `cua-highlight-region-shift-only' is now obsolete.
451 You can disable `transient-mark-mode' to get the same result.
454 *** CUA's rectangles can now be used without CUA by calling the command
455 `cua-rectangle-mark-mode'.
460 *** Support for completion, ElDoc, and Flycheck has been added.
463 *** The current CFEngine syntax is parsed from "cf-promises -s json".
464 There is a fallback syntax available if you don't have cf-promises or
465 if your version doesn't support that option. See option `cfengine-cf-promises'.
468 ** Delete Selection mode can now be used without Transient Mark mode.
473 *** `desktop-save-mode' by default now auto-saves an existing desktop file
474 after `desktop-auto-save-timeout'. To disable this, customize that option
477 *** `desktop-restore-frames', enabled by default, allows saving and
478 restoring the frame/window configuration (frameset). Additional options
479 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
480 and `desktop-restore-forces-onscreen' offer further customization.
483 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
484 such as file ownership or permissions, are visible.
487 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
488 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
489 The results display in the mode line.
491 ** Electric Pair mode
494 *** New option `electric-pair-preserve-balance', enabled by default.
495 If non-nil, pairing/skipping only kicks in when that help the balance
496 of parentheses and quotes, i.e. the buffer should end up at least as
499 You can further control this behavior by adjusting the predicates
500 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
503 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
504 In `electric-pair-mode', the commands `backward-delete-char' and
505 `backward-delete-char-untabify' are now bound to electric variants
506 that delete the closer when invoked between adjacent pairs.
509 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
510 In `electric-pair-mode', inserting a newline between adjacent pairs
511 opens an extra newline after point, which is indented if
512 `electric-indent-mode' is also set.
515 *** New option `electric-pair-skip-whitespace', enabled by default.
516 This controls if skipping over closing delimiters should jump over any
517 whitespace slack. Setting it to `chomp' makes it delete this
518 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
521 *** New variables control the pairing in strings and comments.
522 You can customize `electric-pair-text-pairs' and
523 `electric-pair-text-syntax-table' to tweak pairing behavior inside
524 strings and comments.
527 ** New EPA option `epa-mail-aliases'.
528 You can set this to a list of email address aliases that `epa-mail-encrypt'
529 should use to find keys.
532 ** New ERC option `erc-accidental-paste-threshold-seconds'.
533 If set to a number, this can be used to avoid accidentally pasting large
534 amounts of data into the ERC input.
537 ** New ERT macro `skip-unless' allows skipping ERT tests.
538 See the ERT manual for details.
543 *** `eshell' now supports visual subcommands and options.
544 Eshell has been able to handle "visual" commands (interactive,
545 non-line oriented commands such as top that require display
546 capabilities not provided by eshell) by running them in an Emacs
547 terminal emulator. See `eshell-visual-commands'.
549 This feature has been extended to subcommands and options that make a
550 usually line-oriented command a visual command. Typical examples are
551 "git log" and "git <command> --help", which display their output in a
552 pager by default. See `eshell-visual-subcommands' and
553 `eshell-visual-options'.
556 *** New Eshell-Tramp module.
557 External su and sudo commands are now the default; the internal,
558 Tramp-using variants can still be used by enabling the eshell-tramp
562 ** New F90 mode option `f90-smart-end-names'.
565 Icomplete is now more similar to Ido.
568 *** Icomplete by default now applies to all forms of minibuffer completion.
569 The variable `icomplete-with-completion-tables' (now a user option)
570 controls this. To restore the old behavior, set it back to
571 '(internal-complete-buffer).
574 *** You can navigate through and select completions using the keys
575 from `icomplete-minibuffer-map'.
578 *** The string that separates potential completions is now a customizable
579 option (`icomplete-separator'). The default is " | " rather than ",".
582 *** New face `icomplete-first-match'; and new options
583 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
586 *** The option `icomplete-show-key-bindings' has been removed.
591 *** An Ido user manual is now included.
594 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
595 This means to use virtual buffers if the current ido input does not match
599 *** The variable `ido-decorations' can optionally have two new elements,
600 which are the brackets to use around the sole remaining completion.
605 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
606 visit the next image file and the previous image file in the same
607 directory, respectively.
610 *** New commands to show specific frames of multi-frame images.
611 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
612 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
615 *** New commands to speed up, slow down, or reverse animation.
616 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
617 speed up and slow down the animation. `a r' (`image-reverse-speed')
618 to reverse it and `a 0' (`image-reset-speed') to reset it.
621 *** The command `image-mode-fit-frame' deletes other windows.
622 When toggling, it restores the frame's previous window configuration.
623 It also has an optional frame argument, which can be used by Lisp
624 callers to fit the image to a frame other than the selected frame.
629 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
630 the symbol found near point.
633 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
634 will cycle through faces in `hi-lock-face-defaults' without prompting.
636 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
641 *** New Info face `info-index-match', used to highlight matches in index
642 entries displayed by `Info-index-next', `Info-virtual-index' and
646 *** The Info-edit command is obsolete. Editing Info nodes by hand
647 has not been relevant for some time.
652 *** New option `js-switch-indent-offset'.
655 *** Better indentation of multiple-variable declarations.
656 If a declaration spans several lines, variables on the following lines
657 are lined up to the first one.
660 *** Recognition and better indentation of continuations in array comprehensions.
663 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
668 *** Font locking for texinfo comments and new keywords.
670 *** Completion in Octave file buffers.
674 *** Jump to definition.
676 *** Documentation lookup/search.
679 ** OPascal mode is the new name for Delphi mode
682 *** All delphi-* variables and functions have been renamed to opascal-*.
683 Obsolete aliases exist for those likely to have been used externally.
686 *** The option `delphi-newline-always-indents' has been removed.
687 Use `electric-indent-mode' instead.
690 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
695 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
696 to filter the list of packages by a keyword.
699 *** In the `describe-package' buffer, there are now buttons listing the
700 keywords related to the package. Click on a button to see other packages
701 related to that keyword.
704 *** The format of `archive-contents' files, generated by package
705 repositories, has changed to allow a new (fifth) element in the data
706 vectors, containing an associative list with extra properties.
707 (For example, `describe-package' uses the `:url' extra property to
708 display a "Homepage" header.)
711 ** In Prolog mode, `prolog-use-smie' has been removed,
712 along with the non-SMIE indentation code.
717 *** The new command `remember-notes' creates a buffer that is saved on exit.
718 You can use it as a more permanent *scratch* buffer.
721 *** Remember can now store notes in separate files.
722 To use this, add `remember-store-in-files' to the `remember-handler-functions'
723 option. The files are saved in `remember-data-directory' using
724 names specified by `remember-directory-file-name-format'.
728 *** Customize `rmail-mbox-format' to influence some minor aspects of
729 how Rmail displays non-MIME messages.
732 *** The `unrmail' command now converts from BABYL to mboxrd format,
733 rather than mboxo. Customize `unrmail-mbox-format' to change this.
738 *** Improved syntax highlighting and indentation.
741 *** New `electric-indent-mode' integration.
744 *** New option `ruby-encoding-magic-comment-style'.
747 *** New option `ruby-custom-encoding-magic-comment-template'.
750 *** New option `ruby-align-to-stmt-keywords'.
753 *** New option `ruby-align-chained-calls'.
756 *** More Ruby file types have been added to `auto-mode-alist'.
758 ** Search and Replace
761 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
762 starts a symbol (identifier) incremental search forward with the
763 symbol found near point added to the search string initially.
766 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
767 and adds it to the search string.
769 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
770 between nil and the value of the option `search-invisible' (or `open'
773 *** `query-replace' skips invisible text when `search-invisible' is nil,
774 and opens overlays with hidden text when `search-invisible' is `open'.
777 *** A negative prefix arg of replacement commands replaces backward.
778 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
779 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
782 *** By default, prefix arguments do not now terminate Isearch mode.
783 Set `isearch-allow-prefix' to nil to restore old behavior.
786 *** More Isearch commands accept prefix arguments, namely
787 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
791 *** Word search now matches whitespace at the beginning/end
792 of the search string if it contains leading/trailing whitespace.
793 In an incremental word search or when using a non-nil LAX argument
794 of `word-search-regexp', the lax matching can also match part of
795 the first word (in addition to the lax matching of the last word).
796 The same rules are now applied to the symbol search with the difference
797 that it matches symbols, and non-symbol characters between symbols.
800 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
803 ** The shell.el option `explicit-bash-args' includes --noediting by default.
804 All non-ancient Bash versions support this option.
809 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
812 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
814 ** SMIE indentation can be customized via `smie-config'.
815 Emacs can learn the appropriate indentation settings if you provide it
816 with an indented sample file.
820 Improved login monitoring and appropriate response to login failures.
821 Includes `sql-login-delay' to define maximum wait for a connection.
824 SQL*Plus script placeholders are properly highlighted and identified
825 in `sql-placeholders-filter' correctly. When SQL*Plus is started,
826 options specified in `sql-oracle-options' are passed before the logon
827 parameter, as SQL*Plus expects. The default setting for
828 `sql-oracle-options' has been altered to pass the `-L' option to limit
829 the number of logon attempts per invocation.
832 ** New Term mode option `term-suppress-hard-newline'.
835 ** Todo mode has been rewritten and enhanced.
836 The Todo mode user manual describes all commands and most user
837 options. To support some of these features, a new file format is
838 used, which is incompatible with the old format; however, you can
839 convert old todo and done item files to the new format on initializing
840 the first new todo file, or at any later time with the provided
841 conversion command. The previous version of todo-mode.el has been
842 renamed to otodo-mode.el and is now obsolete. New features include:
844 *** Support for multiple todo files and archive files of done items.
846 *** Renaming, reordering, moving, merging, and deleting categories.
848 *** Sortable tabular summaries of categories and the item types they contain.
850 *** Cross-category lists of items filtered by specific criteria.
852 *** More fine-grained interaction with the Emacs diary, by being able to
853 decide for each todo item whether it appears in the Fancy Diary display.
855 *** Highly flexible new item insertion and item editing.
857 *** Moving items between categories, storing done items in their category
858 or in archive files, undoing or unarchiving done items.
860 *** Reprioritizing items by inputting a numerical priority.
862 *** Extensive customizability of operation and display, including many faces.
867 *** `trace-function' and `trace-function-background' no longer prompt for
868 the output buffer. Unless you use a prefix argument, they output to
872 *** With a prefix argument, `trace-function' and `trace-function-background'
873 will prompt for a "context". This is a Lisp expression, whose value at the
874 time the function is entered/exited is printed along with the function's
880 *** The experimental url syntax for remote file names has been removed.
883 *** New connection method "adb", which allows to access Android
884 devices by the Android Debug Bridge. The variable `tramp-adb-program'
885 can be used to adapt the path of the "adb" program, if needed.
888 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
889 "scpc" and "rsyncc" are discontinued. The ssh option
890 "ControlMaster=auto" is set automatically in all ssh-based methods,
891 when possible. See `tramp-use-ssh-controlmaster-options'.
894 *** Handlers for `file-acl' and `set-file-acl' for remote machines
895 which support POSIX ACLs.
898 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
899 for remote machines which support filesystem notifications.
902 ** New URL command `url-cookie-list' displays the current cookies,
903 and allows you to interactively remove cookies.
905 ** VC and related modes
908 *** In VC directory mode, `D' displays diffs between VC-controlled
909 whole tree revisions.
912 *** In VC directory mode, `L' lists the change log for the current VC
913 controlled tree in a window.
916 *** In VC directory mode, `I' shows a log of changes that will be
917 received with a pull operation.
920 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
921 under current version control system. When called with a prefix
922 argument, you can remove a file from the ignored file list.
927 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
930 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
933 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
934 are obsolete. Customize the `woman-*' faces instead.
939 *** iswitchb.el; use icomplete-mode.
942 *** longlines.el; use visual-line-mode.
951 *** terminal.el; use term.el instead.
954 *** the old version of todo-mode.el (renamed to otodo-mode.el).
957 *** xesam.el (owing to the cancellation of the XESAM project).
960 *** yow.el; use fortune.el or cookie1.el instead.
963 * New Modes and Packages in Emacs 24.4
966 ** New package `eww' is a built-in web browser.
967 It is only available if Emacs is compiled with libxml2 support.
970 ** New minor mode `superword-mode'.
971 This overrides the default word motion commands to treat "symbol_words"
972 as a single word, similar to what `subword-mode' does.
975 ** New package nadvice.el offers lighter-weight advice facilities.
978 *** add-function/remove-function, which can be used to add/remove code on any
979 function-carrying place, such as process-filters or `<foo>-function' hooks.
981 *** advice-add/advice-remove to add/remove a piece of advice on a named
982 function, much like `defadvice' does.
984 ** New package frameset.el.
985 It provides a set of operations to save a frameset (the state of all
986 or a subset of the existing frames and windows, somewhat similar to a
987 frame configuration), both in-session and persistently, and restore it
988 at some point in the future.
991 ** New package filenotify.el provides an interface for file system
992 notifications. It requires that Emacs be compiled with one of the
993 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
996 * Incompatible Lisp Changes in Emacs 24.4
999 ** `kill-region' has lost its `yank-handler' optional argument.
1002 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1003 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1006 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1009 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1010 Some languages match those as »...«, and others as «...», so it is
1011 better for Emacs to stay neutral by default.
1014 ** In compiled Lisp files, the header no longer includes a timestamp.
1017 ** The default file coding for Emacs Lisp files is now utf-8.
1018 (See `file-coding-system-alist'.) In most cases, this change is
1019 transparent, but files that contain unusual characters without
1020 specifying an explicit coding system may fail to load with obscure
1021 errors. You should either convert them to utf-8 or add an explicit
1025 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1026 It used to disable the minor mode, major mode, and text-property keymaps,
1027 whereas now it simply has higher precedence.
1029 ** Default process filters and sentinels are not nil any more.
1030 Instead they default to a function that does what the nil value used to do.
1033 ** `read-event' does not return decoded chars in ttys any more.
1034 As was the case in Emacs 22 and before, the decoding of terminal
1035 input, according to `keyboard-coding-system', is not performed in
1036 `read-event' any more. But unlike in Emacs 22, this decoding is still
1037 done before input-decode-map, function-key-map, etc.
1040 ** The option `inhibit-local-menu-bar-menus' has been removed.
1043 ** Frame-local variables that affect redisplay do not work any more.
1044 More specifically, redisplay does not bother to check for a frame-local
1045 value when looking up variables.
1048 ** nil and "unbound" are indistinguishable in `symbol-function'.
1049 `symbol-function' does not signal a `void-function' error any more.
1050 To determine if a symbol's function definition is void, use `fboundp'.
1053 ** `defadvice' does not honor the `freeze' flag and cannot advise
1054 special-forms any more.
1057 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1058 when lexical binding is enabled. Previously, VAR was bound to nil,
1059 which often led to spurious unused-variable warnings.
1062 ** The return value of `backup-buffer' has changed.
1063 The second argument is no longer an SELinux context, instead it is an
1064 alist of extended attributes as returned by the new function
1065 `file-extended-attributes'. The attributes can be applied to another
1066 file using `set-file-extended-attributes'.
1069 ** By default `copy-file' no longer copies file permission bits to an
1070 existing destination; and it sets the file permission bits of a newly
1071 created destination to those of the source, masked by the default file
1072 permissions. To copy the file permission bits, pass t as the
1073 PRESERVE-PERMISSIONS argument of `copy-file'.
1076 ** `visited-file-modtime' now returns -1 for nonexistent files.
1077 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1078 in the presence of files with negative time stamps.
1081 ** The cars of the elements in `interpreter-mode-alist' are now
1082 treated as regexps rather than literal strings.
1085 * Lisp Changes in Emacs 24.4
1088 ** The second argument of `eval' can now specify a lexical environment.
1091 ** New functions `special-form-p' and `macrop'.
1093 ** New macro `define-alternatives' can be used to define generic commands.
1094 Generic commands are interactive functions whose implementation can be
1095 selected among several alternatives, as a matter of user preference.
1098 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1099 on that symbol will use the associated value as a function to call
1103 ** New variable `enable-dir-local-variables'.
1104 Directory-local variables are ignored if this is nil. This may be
1105 useful for modes that want to ignore directory-locals while still
1106 respecting file-local variables.
1109 ** New function `get-pos-property'.
1112 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1113 as a function to call to provide default values.
1115 ** Completion changes
1117 *** The separator for `completing-read-multiple' can now be a regexp.
1118 The default separator has been changed to allow surrounding spaces
1121 *** The `common-substring' arg of `display-completion-list' is obsolete.
1122 Either use `completion-all-completions', which returns highlighted
1123 strings (including for partial or substring completion), or call
1124 `completion-hilit-commonality' to add the highlight.
1126 *** New function `completion-table-with-cache' is a wrapper for
1127 `completion-table-dynamic' that caches the result of the last lookup.
1129 *** New function `completion-table-merge' to combine several
1130 completion tables by merging their completions.
1132 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1133 let you enable symbol prettification (replacing a string like "lambda" with
1134 the Greek lambda character).
1139 *** Functions to pop up menus and dialogs now work on all terminals,
1140 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1141 `message-box', `yes-or-no-p', etc.
1143 The function `display-popup-menus-p' will now return non-nil for a
1144 display or frame whenever a mouse is supported on that display or
1147 *** New hook `tty-setup-hook'.
1151 *** New display action function `display-buffer-no-window' to not
1152 display the buffer in a window.
1154 *** New display action alist entry `allow-no-window' to indicate the
1155 caller of `display-buffer' is ready to handle the case of not
1156 displaying the buffer in a window.
1158 ** New hook `pre-redisplay-function'.
1161 ** New bool-vector set operation functions
1162 *** `bool-vector-exclusive-or'
1163 *** `bool-vector-union'
1164 *** `bool-vector-intersection'
1165 *** `bool-vector-set-difference'
1166 *** `bool-vector-not'
1167 *** `bool-vector-subsetp'
1168 *** `bool-vector-count-consecutive'
1169 *** `bool-vector-count-population'
1172 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1174 ** Error-handling changes
1177 *** New function `define-error'.
1180 *** `with-demoted-errors' takes an additional argument `format'.
1183 ** New macro `with-eval-after-load'.
1184 This is like the old `eval-after-load', but better behaved.
1187 ** New library subr-x.el with miscellaneous small utility functions
1188 *** `hash-table-keys'
1189 *** `hash-table-values'
1190 *** `string-blank-p'
1191 *** `string-empty-p'
1193 *** `string-reverse'
1194 *** `string-trim-left'
1195 *** `string-trim-right'
1197 *** `string-remove-prefix'
1198 *** `string-remove-suffix'
1201 ** Obsoleted functions
1204 *** `lisp-complete-symbol'
1205 *** `field-complete'
1206 *** `minibuffer-completion-contents'
1207 *** `isearch-nonincremental-exit-minibuffer'
1208 *** `isearch-filter-visible'
1209 *** `generic-make-keywords-list'
1210 *** `get-upcase-table' (use `case-table-get-table' instead).
1212 ** `with-wrapper-hook' is obsoleted by `add-function'.
1213 The few hooks that used with-wrapper-hook are replaced as follows:
1214 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1215 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1216 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1219 ** `byte-compile-interactive-only-functions' is now obsolete.
1220 To specify that a command should only be called interactively, give it
1221 a non-nil `interactive-only' property.
1224 ** `split-string' now takes an optional argument TRIM.
1225 The value, if non-nil, is a regexp that specifies what to trim from
1226 the start and end of each substring.
1229 ** New function `string-suffix-p'.
1231 ** File-handling changes
1234 *** Support for filesystem notifications.
1235 Emacs now supports notifications of filesystem changes, such as
1236 creation, modification, and deletion of files. This requires the
1237 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1238 MS-Windows systems, this is supported for Windows XP and newer
1242 *** The 9th element returned by `file-attributes' is now unspecified.
1243 Formerly, it was t if the file's gid would change if file were deleted
1244 and recreated. This value has been inaccurate for years on many
1245 platforms, and nobody seems to have noticed or cared.
1248 *** The 6th argument to `copy-file' has been renamed to
1249 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1250 Unix file permission bits as well as SELinux context.
1253 *** The function `file-ownership-preserved-p' now has an optional
1254 argument GROUP which causes it check for file group too. This can be
1255 used in place of the 9th element of `file-attributes'.
1258 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1259 argument, with the same interpretation as the returned value of
1260 `visited-file-modtime'.
1262 ** Autorevert changes
1265 *** If Emacs is compiled with file notification support, notifications
1266 are used instead of checking the time stamp of the files. You can
1267 disable this by setting the user option `auto-revert-use-notify' to
1268 nil. Alternatively, a regular expression of directories to be
1269 excluded from file notifications can be specified by
1270 `auto-revert-notify-exclude-dir-regexp'.
1273 *** The new user option `auto-revert-remote-files' enables reversion
1274 of remote files when set to non-nil.
1278 *** The function `face-spec-set' is now like `setq' for face specs.
1279 Its third arg now accepts values specifying a face spec type (defface,
1280 custom, or override spec), and the relevant spec is set accordingly.
1283 *** New function `add-face-text-property', which can be used to
1284 conveniently prepend/append new face properties.
1286 *** Face specs set via Custom themes now replace the `defface' spec
1287 rather than inheriting from it (as do face specs set via Customize).
1289 *** New face characteristic (supports :underline (:style wave))
1290 specifies whether or not the terminal can display a wavy line.
1293 *** New face spec attribute :distant-foreground
1294 specifies foreground to use if background color is near the foreground
1295 color that would otherwise have been used.
1300 *** `image-animated-p' is now `image-multi-frame-p'.
1301 It returns non-nil for any image that contains multiple frames,
1302 whether or not it specifies a frame delay.
1305 *** New variable `image-default-frame-delay' gives the frame delay for
1306 animated images which do not specify a frame delay.
1309 *** New functions `image-current-frame' and `image-show-frame' for getting
1310 and setting the current frame of a multi-frame image.
1315 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1316 **** object-name -> eieio-object-name
1317 **** object-class -> eieio-object-class
1318 **** object-class-fast -> eieio--object-class
1319 **** object-class-name -> eieio-object-class-name
1320 **** object-name-string -> eieio-object-name-string
1321 **** object-num-slots -> eieio--object-num-slots
1322 **** object-set-name-string -> eieio-object-set-name-string
1323 **** class-of -> eieio-object-class
1324 **** class-name -> eieio-class-name
1325 **** class-parent -> eieio-class-parent
1326 **** class-parents -> eieio-class-parents
1327 **** class-parents-fast -> eieio-class-parents-fast
1328 **** class-children -> eieio-class-children
1329 **** class-num-slots -> eieio--class-num-slots
1330 **** class-precedence-list -> eieio-class-precedence-list
1331 **** class-direct-subclasses -> eieio-class-children
1332 **** class-direct-superclasses -> eieio-class-parents
1334 ** Changes in encoding and decoding of text
1337 *** New coding-system `prefer-utf-8'.
1338 This is like `undecided' but prefers UTF-8 on decoding if the text to
1339 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1340 any non-ASCII characters are automatically encoded as UTF-8.
1343 *** New attributes of coding-systems whose type is `undecided'.
1344 Two new attributes, `:inhibit-null-byte-detection' and
1345 `:inhibit-iso-escape-detection', determine how to detect encoding of
1346 text that includes null bytes and ISO-2022 escape sequences,
1347 respectively. Each of these attributes can be either nil, zero, or
1348 t. If it is t, decoding text ignores null bytes and, respectively,
1349 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1350 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1351 text is encoded in one of the ISO-2022 encodings, such as
1352 iso-2022-7bit. If the value is zero, Emacs consults the variables
1353 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1355 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1356 UTF-8 encoding and decoding, whenever possible.
1358 These attributes are only meaningful for coding-systems of type
1359 `undecided'. (The type of a coding-system is determined by its
1360 `:coding-type' attribute and can be accessed by calling the
1361 `coding-system-type' function.)
1364 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1367 ** New functions `group-gid' and `group-real-gid'.
1370 ** The spelling of the rx.el category `chinese-two-byte' has been
1371 corrected (the first 'e' was missing).
1374 ** Minor internal changes to the details of lock files.
1375 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1376 If DIR/.#FILE already exists and is not an Emacs lock file,
1377 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1378 numbered lock files DIR/.#FILE.0...).
1379 On file systems that do not support symbolic links, the lock is now a
1380 regular file with contents being what would have been in the symlink.
1382 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1385 *** The package descriptor and name of global variables, constants,
1386 and functions should be separated by two hyphens if the symbol is not
1387 meant to be used by other packages.
1390 * Changes in Emacs 24.4 on Non-Free Operating Systems
1393 ** The procedure for building Emacs on MS-Windows has changed.
1394 It is now built by running the same configure script as on all other
1395 platforms. This requires the MSYS environment and MinGW development
1396 tools. See the updated instructions in nt/INSTALL for details.
1398 Using the Posix configure script and Makefile's also means a change in
1399 the directory structure of the Emacs installation on Windows. It is
1400 now the same as on GNU and Unix systems. In particular, the auxiliary
1401 programs, such as cmdproxy.exe and hexl.exe, are in
1402 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1403 version), version-independent site-lisp is in share/emacs/site-lisp,
1404 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1405 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1406 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1407 directories and will find the files in there automatically; there's no
1408 need to set any variables due to this change.)
1411 ** Emacs on Windows 2000 and later can now access files and directories
1412 whose names cannot be encoded in the current system codepage.
1414 The new variable `w32-unicode-filenames' controls this feature: if it
1415 is t, Emacs uses Unicode APIs to pass file names to system calls,
1416 which lifts the limitation of file names to the current locale.
1419 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1420 The backtrace is written to the 'emacs_backtrace.txt' file in the
1421 directory where Emacs was running.
1424 ** The variable `buffer-file-type' is no longer supported.
1425 Setting it has no effect, and %t in the mode-line format is ignored.
1426 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1427 modifying it has no effect.
1430 ** Lock files now work on MS-Windows.
1431 This helps to prevent losing your edits if the same file is being
1432 edited in another Emacs session or by another user. See the node
1433 "Interlocking" in the Emacs User Manual for the details. To disable
1434 file locking, customize `create-lockfiles' to nil.
1436 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1437 GNUstep and Mac OS X 10.4 use the old font backend.
1438 To use the old backend by default, do on the command line:
1439 % defaults write org.gnu.Emacs FontBackend ns
1441 ** Improved fullscreen support on Mac OS X.
1442 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1443 Customize `ns-use-native-fullscreen' to change the style.
1444 For Mac OS X 10.7 and newer, native is the default.
1446 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1447 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1448 does not apply to images.
1451 * Installation Changes in Emacs 24.3
1453 ** The default X toolkit is now Gtk+ version 3.
1454 If you don't pass `--with-x-toolkit' to configure, or if you use
1455 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1456 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1457 You can explicitly require a specific version by passing
1458 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1460 ** New configure option `--enable-link-time-optimization', to utilize
1461 an appropriate feature provided by GCC since version 4.5.0.
1463 ** New configure option `--without-all' to disable most of the optional
1464 features (image support, etc.) that are normally enabled by default.
1466 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1467 Emacs). If building with GCC, this enables compile-time checks that
1468 warn/give errors about possibly-questionable C code. On a recent GNU
1469 system there should be no warnings; on older and on non-GNU systems
1470 the results may be useful to developers.
1472 ** The configure option `--enable-use-lisp-union-type' has been
1473 renamed to `--enable-check-lisp-object-type', as the resulting
1474 Lisp_Object type no longer uses a union to implement the compile time
1475 check that this option enables.
1477 ** The configure option `--disable-maintainer-mode' has been removed,
1478 as it was confusingly-named and rarely useful.
1480 ** The configure options `--program-prefix', `--program-suffix', and
1481 `--program-transform-name' apply to more than just the installed
1482 binaries. Now they also affect the man pages, icons, and the
1483 etc/emacs.desktop file; but not the info pages, since this would break
1484 links between the various manuals.
1486 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1487 overwriting "emacs" in the installation bin/ directory with a link
1490 ** Emacs uses libtinfo in preference to libncurses, if available.
1492 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1493 /usr/pkg/lib to the linker search path. You must add them yourself if
1496 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1497 (from the bin and libexec directories, respectively). The former is
1498 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1501 * Startup Changes in Emacs 24.3
1503 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1504 lisp/ directory. There should not be any there anyway. If you have
1505 been adding them there, put them somewhere else; e.g., site-lisp.
1507 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1510 * Changes in Emacs 24.3
1514 *** `C-h f' (`describe-function') can now perform autoloading.
1515 When this command is called for an autoloaded function whose docstring
1516 contains a key substitution construct, that function's library is
1517 automatically loaded, so that the documentation can be shown
1518 correctly. To disable this, set `help-enable-auto-load' to nil.
1520 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1521 even after their associated libraries have been loaded (and the
1522 autoloads have been redefined as functions).
1526 *** Images displayed via ImageMagick now support transparency and the
1527 :background image specification property.
1529 *** When available, ImageMagick support is automatically enabled.
1530 It is no longer necessary to call `imagemagick-register-types'
1531 explicitly to install ImageMagick image types; that function is called
1532 automatically at startup, or when customizing an imagemagick- option.
1534 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1535 ImageMagick to view images. (You must call `imagemagick-register-types'
1536 afterwards if you do not use customize to change this.)
1538 *** The new variable `imagemagick-enabled-types' also affects which
1539 ImageMagick types are treated as images. The function
1540 `imagemagick-filter-types' returns the list of types that will be
1545 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1546 next and previous path separator, respectively.
1548 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1549 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1550 non-nil before enabling the mode.
1554 *** New option `mode-line-default-help-echo' specifies the help text
1555 (shown in a tooltip or in the echo area) for any part of the mode line
1556 that does not have its own specialized help text.
1558 *** You can now click mouse-3 in the coding system indicator to invoke
1559 `set-buffer-file-coding-system'.
1561 ** Server and client
1563 *** emacsclient now obeys string values for `initial-buffer-choice',
1564 if it is told to open a new frame without specifying any file to visit
1565 or expression to evaluate.
1567 *** New option `server-auth-key' specifies a shared server key.
1569 ** Emacs now generates backtraces on fatal errors.
1570 On encountering a fatal error, Emacs now outputs a textual description
1571 of the fatal signal, and a short backtrace on platforms like glibc
1572 that support backtraces.
1574 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1575 This minor mode replaces `toggle-read-only', which is now obsolete.
1577 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1578 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1579 respectively, without exiting from the prompt.
1581 ** In the Package Menu, newly-available packages are listed as "new",
1582 and sorted above the other "available" packages by default.
1584 ** If your Emacs was built from a repository checkout, the new variable
1585 `emacs-bzr-version' contains information about the bzr revision used.
1587 ** New option `create-lockfiles' specifies usage of lockfiles.
1588 It defaults to t. Changing it to nil inhibits the creation of lock
1589 files (use this with caution).
1591 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1592 variables on remote hosts.
1594 ** The entry for PCL-CVS has been removed from the Tools menu.
1595 The PCL-CVS commands are still available via the keyboard.
1597 ** Using "unibyte: t" in Lisp source files is obsolete.
1598 Use "coding: raw-text" instead.
1600 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1601 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1602 The previous binding, introduced in Emacs 24.1, was a mistake, because
1603 `C-c LETTER' bindings are reserved for user customizations.
1605 ** Internationalization
1607 *** New language environment: Persian.
1609 *** New input method `vietnamese-vni'.
1611 ** Nextstep (GNUstep / Mac OS X) port
1613 *** Support for fullscreen and the frame parameter fullscreen.
1615 *** A file dialog is used for open/save operations initiated from the
1619 * Editing Changes in Emacs 24.3
1621 ** Search and Replace
1623 *** Non-regexp Isearch now performs "lax" space matching.
1624 Each sequence of spaces in the supplied search string may match any
1625 sequence of one or more whitespace characters, as specified by the
1626 variable `search-whitespace-regexp'. (This variable is also used by a
1627 similar existing feature for regexp Isearch.)
1629 *** New Isearch command `M-s SPC' toggles lax space matching.
1630 This applies to both ordinary and regexp Isearch.
1632 *** New option `replace-lax-whitespace'.
1633 If non-nil, `query-replace' uses flexible whitespace matching too.
1636 *** Global `M-s _' starts a symbol (identifier) incremental search,
1637 and `M-s _' in Isearch toggles symbol search mode.
1638 `M-s c' in Isearch toggles search case-sensitivity.
1640 ** Navigation commands
1642 *** New binding `M-g c' for `goto-char'.
1644 *** New binding `M-g TAB' for `move-to-column'.
1646 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1647 interactively with no prefix arg. Previously, it moved to column 1.
1649 ** New option `yank-handled-properties' allows processing of text
1650 properties on yanked text, in ways that are more general than just
1651 removing them (as is done by `yank-excluded-properties').
1653 ** New option `delete-trailing-lines' specifies whether
1654 M-x delete-trailing-whitespace should delete trailing lines at the end
1655 of the buffer. It defaults to t.
1657 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1659 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1660 `ucs-insert' is now an obsolete alias for `insert-char'.
1662 ** The `z' key no longer has a binding in most special modes.
1663 It used to be bound to `kill-this-buffer', but `z' is too easy to
1666 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1667 It copies the region-rectangle as the last rectangle kill.
1671 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1673 *** New option `register-separator' specifies the register containing
1674 the text to put between collected texts for use with
1675 M-x append-to-register and M-x prepend-to-register.
1678 * Changes in Specialized Modes and Packages in Emacs 24.3
1680 ** Common Lisp emulation (CL)
1682 *** CL's main entry is now (require 'cl-lib).
1683 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1684 i.e., all its definitions have the "cl-" prefix (and internal definitions
1685 use the "cl--" prefix).
1687 If `cl' provided a feature under the name `foo', then `cl-lib'
1688 provides it under the name `cl-foo' instead; with the exceptions of the
1689 few `cl' definitions that had to use `foo*' to avoid conflicts with
1690 pre-existing Elisp entities. These have been renamed to `cl-foo'
1691 rather than `cl-foo*'.
1693 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1694 provide the old, non-prefixed names. Some exceptions are listed below:
1696 *** `cl-flet' is not like `flet' (which is deprecated).
1697 Instead it obeys the behavior of Common-Lisp's `flet'.
1698 In particular, in cl-flet function definitions are lexically scoped,
1699 whereas in flet the scoping is dynamic.
1701 *** `cl-labels' is slightly different from `labels'.
1702 The difference is that it relies on the `lexical-binding' machinery
1703 (as opposed to the `lexical-let' machinery used previously) to capture
1704 definitions in closures, so such closures will only work if `lexical-binding'
1707 *** `cl-letf' is not exactly like `letf'.
1708 The only difference is in details that relate to some deprecated usage
1709 of `symbol-function' in place forms.
1711 *** `progv' was rewritten to use the `let' machinery.
1712 A side effect is that variables without corresponding values are bound
1713 to nil rather than being made unbound.
1715 *** The following methods of extending `setf' are obsolete
1716 (use features from gv.el instead):
1717 `define-modify-macro' (use `gv-letplace')
1718 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1719 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1720 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1724 *** Changes are now highlighted using the same color scheme as in
1725 modern VCSes. Deletions are displayed in red (new faces
1726 `diff-refine-removed' and `smerge-refined-removed', and new definition
1727 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1728 and `smerge-refined-added', and new definition of `diff-added').
1730 *** The variable `diff-use-changed-face' defines whether to use the
1731 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1732 changes in context diffs.
1734 *** The new command `diff-delete-trailing-whitespace' removes trailing
1735 whitespace introduced by a diff.
1737 ** Ediff now uses the same color scheme as Diff mode.
1741 A new version of python.el, which provides several new features, including:
1742 per-buffer shells, better indentation, Python 3 support, and improved
1743 shell-interaction compatible with iPython (and virtually any other
1746 *** Some user options have been replaced/renamed, including (old -> new):
1747 **** python-indent -> python-indent-offset
1748 **** python-guess-indent -> python-indent-guess-indent-offset
1749 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1750 **** python-use-skeletons -> python-skeleton-autoinsert
1752 *** Some user options have been removed, including:
1754 **** `python-indent-string-contents': Strings are never indented.
1756 **** `python-honour-comment-indentation':
1757 Comments are always considered as indentation markers.
1759 **** `python-continuation-offset': Indentation is automatically
1760 calculated in a pep8 compliant way depending on the context.
1762 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1763 Have no direct mapping as the shell interaction is completely different.
1765 **** `python-python-command', `python-jython-command':
1766 Replaced by `python-shell-interpreter'.
1768 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1769 `python-pdbtrack-minor-mode-string', `python-source-modes':
1772 *** Some commands have been replaced (old -> new):
1773 **** python-insert-class -> python-skeleton-class
1774 **** python-insert-def -> python-skeleton-def
1775 **** python-insert-for -> python-skeleton-for
1776 **** python-insert-if -> python-skeleton-if
1777 **** python-insert-try/except -> python-skeleton-try
1778 **** python-insert-try/finally -> python-skeleton-try
1779 **** python-insert-while -> python-skeleton-while
1780 **** python-find-function -> python-nav-jump-to-defun
1781 **** python-next-statement -> python-nav-forward-sentence
1782 **** python-previous-statement -> python-nav-backward-sentence
1783 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1784 **** python-end-of-defun-function -> python-nav-end-of-defun
1785 **** python-send-buffer -> python-shell-send-buffer
1786 **** python-send-defun -> python-shell-send-defun
1787 **** python-send-region -> python-shell-send-region
1788 **** python-send-region-and-go -> emulate with python-shell-send-region
1789 and python-shell-switch-to-shell
1790 **** python-send-string -> python-shell-send-string
1791 **** python-switch-to-python -> python-shell-switch-to-shell
1792 **** python-describe-symbol -> python-eldoc-at-point
1796 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1798 *** The D-Bus object manager interface is implemented.
1800 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1801 if their value does not fit into Emacs's integer range.
1803 *** The function `dbus-call-method' is now non-blocking.
1804 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1806 *** Signals can also be sent as unicast messages.
1808 *** The argument list of `dbus-register-signal' has been extended,
1809 according to the new match rule types of D-Bus.
1811 *** `dbus-init-bus' supports private connections.
1813 *** There is a new function `dbus-setenv'.
1815 ** `desktop-path' no longer includes the "." directory.
1816 Desktop files are now located in ~/.emacs.d by default.
1820 *** `dired-do-async-shell-command' executes each file sequentially
1821 if the command ends in `;' (when operating on multiple files).
1822 Otherwise, it executes the command on each file in parallel.
1824 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1825 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1828 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1829 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1830 mark/unmark/flag all files in the active region.
1832 *** The minibuffer default for `=' (`dired-diff') has changed.
1833 It is now the backup file for the file at point, if one exists.
1834 In Transient Mark mode the default is the file at the active mark.
1836 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1837 The global binding for `M-=', `count-words-region' is in effect.
1841 *** New module "notifications", which can send a notification when you
1842 receive a private message or your nickname is mentioned.
1844 *** ERC will look up server/channel names via auth-source and use any
1847 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1848 only applies to messages sent by lurkers.
1850 ** reStructuredText mode
1852 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1853 fontification, comment handling, and customization have all been revised
1856 *** Support for `imenu' and `which-function-mode'.
1858 *** The reStructuredText syntax is more closely covered.
1859 Sphinx support has been improved.
1861 *** `rst-insert-list' inserts new list or continues existing lists.
1863 *** A negative prefix argument always works for `rst-adjust'.
1865 *** The window configuration is reset after displaying a TOC.
1867 *** The constant `rst-version' describes the rst.el package version.
1871 *** Support for percent literals and recognition of regular expressions
1872 in method calls without parentheses with more methods, including Cucumber
1875 *** Improved syntax highlighting and indentation.
1877 *** New command `ruby-toggle-block', bound to `C-c {'.
1879 *** Some non-standard keybindings/commands have been removed:
1881 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1883 **** `ruby-mark-defun'; use `mark-defun'.
1885 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1886 appropriate settings for the variables `beginning-of-defun-function'
1887 and `end-of-defun-function'.
1889 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1890 `reindent-then-newline-and-indent' and `newline' have been removed.
1892 ** Shell Script mode
1894 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1896 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1898 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1902 *** The free software compiler GHDL is supported (and now the default).
1904 *** Support for the VHDL-AMS packages has been added/updated.
1906 *** Updated to the 2002 revision of the VHDL standard.
1908 *** Accepts \r and \f as whitespace.
1912 *** The faces used by Apropos are now directly customizable.
1913 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1914 see the `apropos' Custom group for details.
1916 *** The old options whose values specified faces to use have been removed
1917 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1918 `apropos-match-face' and `apropos-property-face'.).
1922 *** This package has been rewritten to use Tabulated List mode.
1924 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1925 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1929 *** Algebraic simplification mode is now the default.
1930 To restrict to the limited simplifications given by the former
1931 default simplification mode, use `m I'.
1935 *** You can customize the header text that appears above each calendar month.
1936 See the variable `calendar-month-header'.
1938 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1940 *** The calendars produced by cal-html include holidays.
1941 Customize `cal-html-holidays' to change this.
1945 *** The major modes from the parser generators "Bovine" and "Wisent"
1946 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1947 are in `auto-mode-alist', and the corresponding manuals are included.
1951 **** Menu support for the "Configuration" feature. This allows users to
1952 choose the active configuration (such as debug or install) from the menu.
1954 **** New command `ede-set' to interactively set project-local variables.
1956 **** Support for compiling, debugging, and running in "generic" projects.
1958 **** Autoconf editing support for M4 macros with complex arguments.
1960 **** Compilation support for the "linux" project type.
1962 **** "simple" projects have been removed; use "generic" projects instead.
1966 **** Support for parsing #include statements inside a namespace in C/C++.
1968 **** Improved support for 'extern "C"' declarations in C/C++.
1970 **** The ability to ignore more common special C/C++ preprocessor symbols,
1971 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1972 If available, include cdefs.h as an additional source of preprocessor symbols.
1974 **** Improved C/C++ function pointer parsing.
1976 **** In Python, support for converting imports to include file names.
1978 **** Ability to dynamically determine the Python load path.
1980 **** Support for the Python 'WITH' and 'AT' keywords.
1982 **** Improved tooltip completion.
1986 **** The SRecode manual is now included.
1988 **** Tag generation supports constructor/destructor settings and system
1989 include differentiation.
1991 **** Addition of 'Framework' support: Frameworks are specified when a
1992 particular kind of library (such as Android) is needed in a common language
1995 **** Support for nested templates and let variables override based on priority.
1997 **** Support for merging tables from multiple related modes, such as
1998 default -> c++ -> arduino.
2000 ** Compile has a new option `compilation-always-kill'.
2004 *** `custom-reset-button-menu' now defaults to t.
2006 *** Non-option variables are never matched in `customize-apropos' and
2007 `customize-apropos-options' (i.e., the prefix argument does nothing for
2008 these commands now).
2012 *** The variables `term-default-fg-color' and `term-default-bg-color'
2013 are now deprecated in favor of the customizable face `term'.
2015 *** You can customize how to display ANSI terminal colors and styles
2016 by customizing the corresponding `term-color-<COLOR>',
2017 `term-color-underline' and `term-color-bold' faces.
2021 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2023 *** Remote processes are now also supported on remote MS-Windows hosts.
2027 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2028 Previously, this slot stored semicolon-separated attribute-value pairs
2029 appended to some imap URLs, but this is not compatible with RFC 3986.
2030 So now the `filename' slot stores the entire path and query components,
2031 and the `attributes' slot is always nil.
2033 *** New function `url-encode-url' for encoding a URI string.
2034 The `url-retrieve' function now uses this to encode its URL argument,
2035 in case that is not properly encoded.
2037 ** notifications.el supports now version 1.2 of the Notifications API.
2038 The function `notifications-get-capabilities' returns the supported
2041 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2042 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2043 `flymake-warning-bitmap'.
2045 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2046 specifying URL types that should be converted to remote file names at
2047 the FFAP prompt. The default is now '("ftp").
2049 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2050 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2052 ** New option `mouse-avoidance-banish-position' specifies where the
2053 `banish' mouse avoidance setting moves the mouse.
2055 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2056 closing brackets to be aligned with the line of the opening bracket.
2058 ** In Proced mode, new command `proced-renice' renices marked processes.
2060 ** New option `async-shell-command-buffer' specifies the buffer to use
2061 for a new asynchronous `shell-command' when the default output buffer
2062 `*Async Shell Command*' is already in use.
2064 ** SQL mode has a new option `sql-db2-escape-newlines'.
2065 If non-nil, newlines sent to the command interpreter will be escaped
2066 by a backslash. The default does not escape the newlines and assumes
2067 that the sql statement will be terminated by a semicolon.
2069 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2070 (and modes that derive from it), sorts the column at point, or the Nth
2071 column if a numeric prefix argument is given.
2073 ** `which-func-modes' now defaults to t, so Which Function mode, when
2074 enabled, applies to all applicable major modes.
2076 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2079 ** Follow mode no longer works by using advice.
2080 The option `follow-intercept-processes' has been removed.
2082 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2084 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2085 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2086 *** semantic-change-hooks -> semantic-change-functions
2087 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2088 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2089 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2090 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2091 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2092 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2093 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2094 *** rcirc-activity-hooks -> rcirc-activity-functions
2095 *** rcirc-print-hooks -> rcirc-print-functions
2096 *** dbus-event-error-hooks -> dbus-event-error-functions
2097 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2098 *** checkdoc-style-hooks -> checkdoc-style-functions
2099 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2100 *** archive-extract-hooks -> archive-extract-hook
2101 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2102 *** hfy-post-html-hooks -> hfy-post-html-hook
2103 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2104 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2105 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2106 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2108 ** Obsolete packages
2111 In most cases, assoc+member+push+delq work just as well.
2112 And in any case it's just a terrible package: ugly semantics, terrible
2113 inefficiency, and not namespace-clean.
2122 * Incompatible Lisp Changes in Emacs 24.3
2124 ** Docstrings starting with `*' no longer indicate user options.
2125 Only variables defined using `defcustom' are considered user options.
2126 The function `user-variable-p' is now an obsolete alias for
2127 `custom-variable-p'.
2129 ** The return values of `defalias', `defun' and `defmacro' have changed,
2130 and are now undefined. For backwards compatibility, `defun' and
2131 `defmacro' currently return the name of the newly defined
2132 function/macro, but this should not be relied upon.
2134 ** `random' by default now returns a different random sequence in
2135 every Emacs run. Use `(random S)', where S is a string, to set the
2136 random seed to a value based on S, in order to get a repeatable
2137 sequence in later calls.
2139 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2140 that substring is inserted literally even if the LITERAL arg is
2141 non-nil, instead of causing an error to be signaled.
2143 ** `select-window' now always makes the window's buffer current.
2144 It does so even if the window was selected before.
2146 ** The function `x-select-font' can return a font spec, instead of a
2147 font name as a string. Whether it returns a font spec or a font name
2148 depends on the graphical library.
2150 ** `face-spec-set' no longer sets frame-specific attributes when the
2151 third argument is a frame (that usage was obsolete since Emacs 22.2).
2153 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2155 ** The CL package's `get-setf-method' function no longer exists.
2156 Generalized variables are now part of core Emacs Lisp, and implemented
2157 differently to the way cl.el used to do it. It is not possible to
2158 define a compatible replacement for `get-setf-method'. See the file
2159 gv.el for internal details of the new implementation.
2161 ** The arguments of `dbus-register-signal' are no longer just strings,
2162 but keywords or keyword-string pairs. The old argument list will
2163 still be supported for Emacs 24.x.
2165 ** Miscellaneous name changes
2166 Some Lisp symbols have been renamed to correct their spelling,
2167 or to be more consistent with standard Emacs terminology.
2169 *** Renamed functions
2170 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2171 **** inactivate-input-method -> deactivate-input-method
2172 **** quail-inactivate -> quail-deactivate
2173 **** robin-inactivate -> robin-deactivate
2174 **** viper-inactivate-input-method -> viper-deactivate-input-method
2175 **** viper-inactivate-input-method-action ->
2176 viper-deactivate-input-method-action
2177 **** ucs-input-inactivate -> ucs-input-deactivate
2180 The old hooks are still supported for backward compatibility, but they
2181 are deprecated and will be removed eventually.
2182 **** input-method-inactivate-hook -> input-method-deactivate-hook
2183 **** robin-inactivate-hook -> robin-deactivate-hook
2184 **** quail-inactivate-hook -> quail-deactivate-hook
2186 *** Renamed variables
2187 **** follow-deactive-menu -> follow-inactive-menu
2188 **** inactivate-current-input-method-function ->
2189 deactivate-current-input-method-function
2191 ** Some obsolete functions, variables, and faces have been removed:
2192 *** `last-input-char', `last-command-char', `unread-command-char'
2193 *** `facemenu-unlisted-faces'
2194 *** `rmail-decode-mime-charset'
2195 *** `iswitchb-read-buffer'
2196 *** `sc-version', `sc-submit-bug-report'
2197 *** `set-char-table-default'
2198 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2199 *** `compile-internal'
2201 *** `mode-line-inverse-video'
2202 *** `follow-mode-off-hook'
2203 *** `cvs-commit-buffer-require-final-newline'
2204 (use `log-edit-require-final-newline' instead)
2205 *** `cvs-changelog-full-paragraphs'
2206 (use `log-edit-changelog-full-paragraphs' instead)
2207 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2208 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2209 *** `vc-master-templates' (use `vc-handled-backends' instead)
2210 *** `vc-checkout-carefully'
2213 * Lisp Changes in Emacs 24.3
2215 ** CL-style generalized variables are now in core Elisp.
2216 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2217 You can define your own generalized variables using `gv-define-simple-setter',
2218 `gv-define-setter', etc.
2220 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2221 This can significantly speed up execution of non-byte-compiled code,
2222 but can also bump into previously unnoticed cyclic dependencies.
2223 These are generally harmless: they will simply cause the macro calls
2224 to be left for later expansion (as before), but will result in a
2225 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2226 You may wish to restructure your code so this does not happen.
2228 ** New sampling-based Elisp profiler.
2229 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2230 When finished, use M-x profiler-stop. The sampling rate can be based on
2231 CPU time or memory allocations.
2233 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2234 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2236 ** New macros `setq-local' and `defvar-local'.
2238 ** Face underlining can now use a wave.
2240 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2241 of `read-regexp' accepts a string ending with a colon and space, and its
2242 second argument DEFAULTS can be a list of strings accessible via `M-n'
2243 in the minibuffer ahead of other hard-coded useful regexp-related values.
2244 More commands use `read-regexp' now to read their regexp arguments.
2248 *** New function `completion-table-with-quoting' to handle completion
2249 in the presence of quoting, such as file completion in shell buffers.
2251 *** New function `completion-table-subvert' to use an existing completion
2252 table, but with a different prefix.
2256 *** New error type and new function `user-error'.
2257 These do not trigger the debugger.
2259 *** New option `debugger-bury-or-kill', saying what to do with the
2260 debugger buffer when exiting debug.
2262 *** Set `debug-on-message' to enter the debugger when a certain
2263 message is displayed in the echo area. This can be useful when trying
2264 to work out which code is doing something.
2266 *** New var `inhibit-debugger', automatically set to prevent accidental
2267 recursive invocations.
2271 *** New command `fit-frame-to-buffer' adjusts the frame height to
2274 *** The command `fit-window-to-buffer' can adjust the frame height
2275 if the new option `fit-frame-to-buffer' is non-nil.
2277 *** New macro `with-temp-buffer-window', similar to
2278 `with-output-to-temp-buffer'.
2280 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2283 *** New option `switch-to-buffer-preserve-window-point' to restore a
2284 window's point when switching buffers.
2286 *** New display action alist entries `window-height' and `window-width'
2287 specify the size of new windows created by `display-buffer'.
2289 *** New display action alist entry `pop-up-frame-parameters', if
2290 non-nil, specifies frame parameters to give any newly-created frame.
2292 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2293 tells display action functions to avoid changing which frame is
2296 *** New display action alist entry `previous-window', if non-nil,
2297 specifies window to reuse in `display-buffer-in-previous-window'.
2299 *** New display action functions `display-buffer-below-selected',
2300 and `display-buffer-in-previous-window'.
2302 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2303 now accept a third argument to avoid choosing the selected window.
2305 *** Additional values recognized for option `window-combination-limit'.
2307 *** The following variables are obsolete, as they can be replaced by
2308 appropriate entries in the `display-buffer-alist' function introduced
2310 **** `dired-shrink-to-fit'
2311 **** `display-buffer-reuse-frames'
2312 **** `display-buffer-function'
2313 **** `special-display-buffer-names'
2314 **** `special-display-frame-alist'
2315 **** `special-display-function'
2316 **** `special-display-regexps'
2320 *** `current-time-string' no longer requires that its argument's year
2321 must be in the range 1000..9999. It now works with any year supported
2322 by the underlying C implementation.
2324 *** `current-time' now returns extended-format time stamps
2325 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2326 PSEC is typically a multiple of 1000 on current machines. Other
2327 functions that use this format, such as `file-attributes' and
2328 `format-time-string', have been changed accordingly. Old-format time
2329 stamps are still accepted.
2331 *** The format of timers in `timer-list' and `timer-idle-list' is now
2332 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2333 The PSECS slot is new, and uses picosecond resolution. It can be
2334 accessed via the new `timer--psecs' accessor.
2336 *** Last-modified time stamps in undo lists now are of the form
2337 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2341 *** Improved security when handling persistent objects:
2343 **** `eieio-persistent-read' now features optional arguments for specifying
2344 the class to load, as well as a flag stating whether subclasses are allowed;
2345 if provided, other classes will be rejected by the reader. For
2346 compatibility with existing code, if the class is omitted only a
2349 **** New specialized reader for pulling in classes and signaling errors
2350 without evaluation of suspicious code.
2352 **** All slots that contain objects must have a :type. Slots with lists
2353 of objects must use a new type predicate for a list of an object type.
2355 *** Support for `find-function' and similar utilities, through the addition
2356 of filename support to generated symbols.
2358 ** Floating point functions now always return special values like NaN,
2359 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2360 Previously, they returned NaNs on some platforms but signaled errors
2361 on others. The affected functions are acos, asin, tan, exp, expt,
2362 log, log10, sqrt, and mod.
2364 ** New fringe bitmap `exclamation-mark'.
2366 ** Miscellaneous changes to special forms and macros
2368 *** `defun' and `defmacro' are now macros rather than special forms.
2370 *** `kbd' is now a function rather than a macro.
2372 ** Miscellaneous new functions
2374 *** `set-temporary-overlay-map' sets up a temporary keymap that
2375 takes precedence over most other maps for a short while (normally one key).
2377 *** `autoloadp' tests if its argument is an autoloaded object.
2379 *** `autoload-do-load' performs the autoloading operation.
2381 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2383 *** `file-name-base' returns a file name sans directory and extension.
2385 *** `function-get' fetches a function property, following aliases.
2387 *** `posnp' tests if an object is a `posn'.
2389 *** `system-users' returns the user names on the system.
2391 *** `system-groups' returns the group names on the system.
2393 *** `tty-top-frame' returns the topmost frame of a text terminal.
2395 ** The following functions and variables are obsolete:
2396 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2397 *** `buffer-has-markers-at'
2398 *** `macro-declaration-function' (use `macro-declarations-alist')
2399 *** `window-system-version' (provides no useful information)
2400 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2401 *** `query-replace-interactive'
2402 *** `font-list-limit' (has had no effect since Emacs < 23)
2405 * Changes in Emacs 24.3 on Non-Free Operating Systems
2407 ** Cygwin builds can use the native MS Windows user interface.
2408 Pass `--with-w32' to configure. The default remains the X11 interface.
2410 ** Two new functions are available in Cygwin builds:
2411 `cygwin-convert-file-name-from-windows' and
2412 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2413 code to access the Cygwin file-name mapping machinery to convert
2414 between Cygwin and Windows-native file and directory names.
2416 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2417 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2418 `mouse-autoselect-window'.
2420 ** On MS Windows Vista and later Emacs now supports symbolic links.
2422 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2423 support for libxml2, even if its presence is detected.
2425 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2427 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2428 directories to the search path. You must add them yourself if you want them.
2431 * Changes in Emacs 24.2
2433 ** This is mainly a bug-fix release.
2436 * Installation Changes in Emacs 24.1
2438 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2439 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2440 also depend on Gtk+. You can disable them with --without-rsvg and
2443 ** Emacs can be compiled with GnuTLS support.
2444 This happens by default if a suitably recent version of the library is
2445 found at build time. To prevent this, use the configure option
2446 `--without-gnutls'. See below for GnuTLS features.
2448 ** Emacs can be compiled with SELinux support.
2449 This happens by default if a suitably recent version of the library is
2450 found at build time. To prevent this, use the configure option
2451 `--without-selinux'. See below for SELinux features.
2453 ** Emacs can be compiled with ImageMagick support.
2454 This happens by default if a suitably recent version of the library is
2455 found at build time. To prevent this, use the configure option
2456 `--without-imagemagick'. See below for ImageMagick features.
2457 This feature is not available for the Nextstep or MS ports.
2459 ** Emacs can be compiled with libxml2 support.
2460 This happens by default if a suitably recent version of the library is
2461 found at build time. To prevent this, use the configure option
2462 `--without-xml2'. See below for libxml2 features.
2464 ** By default, the installed Info and man pages are compressed.
2465 You can disable this by configuring --without-compress-info.
2467 ** New configure option --with-wide-int.
2468 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2469 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2472 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2473 These provide no new functionality, they just remove the need to edit
2474 lib-src/Makefile by hand in order to use the associated features.
2476 ** New configure option --enable-use-lisp-union-type.
2477 This is only useful for Emacs developers to debug certain types of bugs.
2478 This is not a new feature; only the configure flag is new.
2480 ** The standalone programs digest-doc and sorted-doc are removed.
2481 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2483 ** The standalone program `fakemail' is removed.
2484 If you need it, feedmail.el provides a superset of the functionality.
2487 * Startup Changes in Emacs 24.1
2489 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2490 command line arguments, and the EMACS_UNIBYTE environment variable, no
2491 longer have any effect. (They were declared obsolete in Emacs 23.)
2493 ** New command line option `--no-site-lisp' removes site-lisp directories
2494 from load-path. -Q now implies this. This option does not affect the
2495 EMACSLOADPATH environment variable (and hence has no effect for
2499 * Changes in Emacs 24.1
2503 *** Many packages now use the `completion-at-point' command,
2504 rather than implementing separate completion commands.
2506 *** `completion-at-point' now handles tags and semantic completion.
2508 *** Completion in a non-minibuffer now tries to detect the end of completion
2509 and pops down the *Completions* buffer accordingly.
2511 *** New option `completion-cycle-threshold' allows completion cycling.
2513 *** New option `completion-category-overrides' for overriding the
2514 default completion style in certain circumstances.
2516 *** New completion style `substring'.
2518 *** Completion of buffer names uses `substring' completion by default.
2520 *** The option `widget-complete-field' has been removed.
2524 *** The first time you try sending mail, Emacs asks for a mail method.
2525 This is implemented by a new default for `send-mail-function', which
2526 is `sendmail-query-once'. This offers to use the smtpmail package, or
2527 to use the old defaults relying on external mail facilities
2528 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2529 `mailclient-send-it' on Windows).
2531 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2532 transfers the report to your desktop's preferred mail client, if there
2533 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2536 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2537 and Mail mode changes
2539 ** Emacs server and client changes
2541 *** New option `server-port' specifies the port for TCP Emacs servers.
2543 *** New emacsclient argument -q/--quiet suppresses some status messages.
2545 *** New emacsclient argument --frame-parameters specifies the frame
2546 parameters of any newly-created graphical frame.
2548 *** If emacsclient shuts down due to Emacs signaling an error,
2549 its exit status is 1.
2551 *** New emacsclient argument --parent-id ID.
2552 This opens a client frame in parent X window ID, via XEmbed, similar
2553 to the --parent-id argument to Emacs.
2555 ** Internationalization changes
2557 *** Emacs now supports display and editing of bidirectional text.
2558 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2559 displayed in the correct visual order as expected by users of those
2560 scripts. The display reordering is a "full bidirectionality" class
2561 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2562 with no RTL text should look exactly the same as before.
2564 **** New buffer-local variable `bidi-display-reordering'.
2565 To disable display reordering in a buffer, change this to nil.
2567 **** New buffer-local variable `bidi-paragraph-direction'.
2568 If nil (the default), Emacs determines the base direction of each
2569 paragraph from its text, as specified by the UBA. Setting the value
2570 to `right-to-left' or `left-to-right' forces a base direction on each
2573 Paragraphs with right-to-left base direction are displayed starting at
2574 the right window edge.
2576 *** Enhanced support for characters with no glyphs in available fonts,
2577 or, on text terminals, characters that cannot be encoded by the
2578 terminal coding system. The new option `glyphless-char-display-control'
2579 specifies how to display them: as a hexadecimal code in a box, a thin
2580 1-pixel space, an empty box, etc.
2582 *** New input methods for Farsi and Bulgarian
2583 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2585 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2586 (U+2010 and U+2011).
2588 *** New Hebrew translation of the Emacs Tutorial.
2589 Type `C-u C-h t' to choose it in case your language setup doesn't
2590 automatically select it.
2592 ** An Emacs Lisp package manager is now included.
2593 This is a convenient way to download and install additional packages,
2594 from a package repository at http://elpa.gnu.org.
2596 *** M-x list-packages shows a list of packages, which can be
2597 selected for installation.
2599 *** New command `describe-package', bound to `C-h P'.
2601 *** By default, all installed packages are loaded automatically when
2602 Emacs starts up. To disable this, set `package-enable-at-startup' to
2603 nil. To specify the packages to load, customize `package-load-list'.
2605 ** Custom theme changes
2607 *** New command `M-x customize-themes', which provides a convenient
2608 interface for enabling and disabling Custom themes.
2610 *** New option `custom-theme-load-path' is the load path for themes.
2611 Emacs no longer looks for Custom themes in `load-path'. The default
2612 value of `custom-theme-load-path' says to look for themes in
2613 `custom-theme-directory', followed by a subdirectory of
2614 `data-directory' named "themes/", which contains a small selection of
2615 built-in Custom themes.
2617 *** New option `custom-safe-themes' records known-safe theme files.
2618 If a theme is not in this list, Emacs queries before loading it, and
2619 offers to save the theme to `custom-safe-themes' automatically. By
2620 default, all themes included in Emacs are treated as safe.
2622 ** Improved GTK integration
2624 *** GTK scroll-bars are now placed on the right by default.
2625 The function `set-scroll-bar-mode' can change this.
2627 *** GTK tool bars can have just text, just images or images and text.
2628 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2629 the default is taken from desktop settings.
2631 *** GTK tool bars can be placed on any edge of the frame.
2632 The frame-parameter tool-bar-position controls this. It takes the
2633 values top, left, right or bottom. The Options => Show/Hide menu has
2636 *** The default colors for selected text (the `region' face) are taken
2637 from the GTK theme when Emacs is built with GTK.
2639 *** Emacs uses GTK tooltips by default if built with GTK.
2640 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2642 ** Graphical interface changes
2644 *** On graphical displays, the mode-line no longer ends in dashes.
2645 Also, the first dash (which does not indicate anything) is just
2646 displayed as a space.
2648 *** `menu-bar-select-buffer-function' lets you choose another operation
2649 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2651 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2652 built with Xft. These fonts can be set via X resources, for example:
2653 Emacs.pane.menubar.font: Courier-12
2657 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2658 or if it receives a SIGINT signal in batch mode.
2660 *** `kill-emacs-hook' is now also run in batch mode.
2661 Third-party code which adds to `kill-emacs-hook' should check if they
2662 do the right thing in batch mode.
2664 ** Scrolling changes
2666 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2667 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2668 of buffer at first key-press (instead they move to top/bottom of buffer)
2669 when `scroll-error-top-bottom' is non-nil.
2671 *** New option `scroll-error-top-bottom' (see above).
2673 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2674 scroll a line instead of full screen.
2676 *** New property `scroll-command' should be set on a command's symbol to
2677 define it as a scroll command affected by `scroll-preserve-screen-position'.
2679 *** If you customize `scroll-conservatively' to a value greater than 100,
2680 Emacs will never recenter point in the window when it scrolls due to
2681 cursor motion commands or commands that move point (e.f., `M-g M-g').
2682 Previously, you needed to use `most-positive-fixnum' as the value of
2683 `scroll-conservatively' to achieve the same effect.
2685 *** "Aggressive" scrolling now honors the scroll margins.
2686 If you customize `scroll-up-aggressively' or
2687 `scroll-down-aggressively' and move point off the window, Emacs now
2688 scrolls the window so as to avoid positioning point inside the scroll
2691 ** Basic SELinux support has been added.
2692 This requires Emacs to be linked with libselinux at build time.
2694 *** Emacs preserves the SELinux file context when backing up.
2695 Also, the function `copy-file' has an extra optional argument for
2696 preserving SELinux context, and the return value of `backup-buffer'
2697 now includes the SELinux context.
2699 *** New functions `file-selinux-context' and `set-file-selinux-context'
2700 get and set the SELinux context of a file.
2704 *** `delete-by-moving-to-trash' now only affects commands that specify
2705 trashing. This avoids inadvertently trashing temporary files.
2707 *** Calling `delete-file' or `delete-directory' with a prefix argument
2708 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2710 ** File- and directory-local variable changes
2712 *** You can stop directory local vars from applying to subdirectories.
2713 Add an element (subdirs . nil) to the alist portion of any variables
2714 settings to indicate that the section should not apply to
2717 *** Directory local variables can apply to some file-less buffers.
2718 Affected modes include dired, vc-dir, and log-edit. For example,
2719 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2720 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2721 `hack-dir-local-variables-non-file-buffer' to support this.
2723 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2724 Instead, use "eval: (minor-mode 1)".
2726 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2727 to `inhibit-local-variables-regexps'. As the name suggests, it now
2728 applies to ALL file local variables, not just -*- lines. The
2729 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2734 *** The `quit-window' command now restores the last buffer displayed
2735 in the quitted window.
2737 *** Resizing an Emacs frame now preserves proportional window sizes,
2738 modulo restrictions like window minimum sizes and fixed-size windows.
2740 *** The behavior of `display-buffer' is now customizable in detail.
2742 **** New option `display-buffer-base-action' specifies a list of
2743 user-determined display "actions" (functions and optional arguments
2744 for choosing the displaying window).
2746 This takes precedence over the default display action, which is
2747 specified by `display-buffer-fallback-action'.
2749 **** New option `display-buffer-alist' maps buffer name regexps to
2750 display actions, taking precedence over `display-buffer-base-action'.
2752 *** New option `window-combination-limit'.
2753 The new option `window-combination-limit' allows to return the space
2754 obtained for resizing or creating a window more reliably to the window
2755 from which such space was obtained.
2757 *** New option `window-combination-resize'.
2758 The new option `window-combination-resize' allows to split a window that
2759 otherwise cannot be split because it's too small by stealing space from
2760 other windows in the same combination. Subsequent resizing or deletion
2761 of the window will resize all windows in the same combination as well.
2763 *** New option `frame-auto-hide-function' lets you choose between
2764 iconifying or deleting a frame when burying a buffer in a dedicated
2765 frame, or quitting a window showing a buffer in a frame of its own.
2767 *** New commands `maximize-window' and `minimize-window'.
2768 These maximize and minimize the size of a window within its frame.
2770 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2771 These functions allow to navigate through the live buffers that have
2772 been shown in a specific window.
2774 ** Minibuffer changes
2776 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2777 This is handy for minibuffer-only frames, and is also used for the feature
2778 where mouse-1 pops up *Messages*"', which can now easily be changed.
2780 *** Minibuffers set `truncate-lines' to nil.
2781 If you want to change the value to something else, you could use
2782 for example `minibuffer-setup-hook'.
2784 ** `auto-mode-case-fold' is now enabled by default.
2786 ** `backup-by-copying-when-mismatch' now defaults to t.
2788 ** New basic faces `error', `warning', `success'.
2789 These are used to highlight text indicating failure, caution or
2790 successful operation.
2792 ** New option `list-colors-sort' defines the color sort order
2793 for `list-colors-display'.
2795 ** The variable `focus-follows-mouse' now always defaults to nil.
2798 * Editing Changes in Emacs 24.1
2802 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2803 `isearch-yank-line'.
2805 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2806 `isearch-yank-kill'.
2808 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2810 ** New commands `count-words-region' and `count-words'.
2812 *** M-= is bound to `count-words-region', not `count-lines-region'.
2813 The `count-words-region' command, when called interactively, reports
2814 the number of lines, words, and characters in the region. It is a
2815 superset of the old `count-lines-region', which is now an obsolete
2818 ** The command `just-one-space' (M-SPC), if given a negative argument,
2819 also deletes newlines around point.
2823 *** New option `delete-active-region'.
2824 If non-nil, [delete] and DEL delete the region if it is active and no
2825 prefix argument is given. If set to `kill', those commands kill
2828 *** New command `delete-forward-char', bound to [delete].
2829 This is meant for interactive use, and obeys `delete-active-region'.
2830 The command `delete-char' does not obey `delete-active-region'.
2832 *** `delete-backward-char' is now a Lisp function.
2833 Apart from obeying `delete-active-region', its behavior is unchanged.
2834 However, the byte compiler now warns if it is called from Lisp; Lisp
2835 callers should use delete-char with a negative argument instead.
2837 *** The option `mouse-region-delete-keys' has been deleted.
2839 ** Selection changes.
2841 The default handling of clipboard and primary selections has been
2842 changed to conform with modern X applications. In short, most
2843 commands for killing and yanking text now use the clipboard, while
2844 mouse commands use the primary selection.
2846 In the following, we provide a list of these changes, followed by a
2847 list of steps to get the old behavior back if you prefer that.
2849 *** `select-active-regions' now defaults to t.
2850 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2851 the kill ring. The selected text is put in the primary selection, if
2852 the system possesses a separate primary selection facility (e.g. X).
2854 **** `select-active-regions' also accepts a new value, `only'.
2855 This means to only set the primary selection for temporarily active
2856 regions (usually made by mouse-dragging or shift-selection);
2857 "ordinary" active regions, such as those made with C-SPC followed by
2858 point motion, do not alter the primary selection.
2860 **** `mouse-drag-copy-region' now defaults to nil.
2862 *** mouse-2 is now bound to `mouse-yank-primary'.
2863 This pastes from the primary selection, ignoring the kill-ring.
2864 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2866 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2868 *** `x-select-enable-primary' now defaults to nil.
2869 Thus, commands that kill text or copy it to the kill-ring (such as
2870 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2872 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2873 exactly equivalent to M-w, C-w, and C-y respectively.
2875 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2876 non-nil by default, as Windows does not support the primary selection
2877 between applications.
2879 *** To return to the previous behavior, do the following:
2881 **** Change `select-active-regions' to nil.
2882 **** Change `mouse-drag-copy-region' to t.
2883 **** Change `x-select-enable-primary' to t (on X only).
2884 **** Change `x-select-enable-clipboard' to nil.
2885 **** Bind `mouse-yank-at-click' to mouse-2.
2887 *** Support for X cut buffers has been removed.
2889 *** X clipboard managers are now supported.
2890 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2892 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2893 in the current rectangle. With a prefix argument, this prompts for a
2894 number to count from and for a format string.
2896 ** `redisplay-dont-pause' now defaults to t.
2897 This makes Emacs feel more responsive to editing commands that arrive
2898 at high rate, e.g. if you lean on some key, because stopping redisplay
2899 in the middle (when this variable is nil) forces more expensive
2900 updates later on, and Emacs appears to be unable to keep up.
2902 ** The behavior of <TAB> for active regions in Text mode has changed.
2903 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2904 when the region is active causes Emacs to indent all the lines in the
2905 region, aligning them with the line previous to the first line in the
2906 region (or with the left margin if there is no previous line).
2908 ** When `occur' is called with a prefix argument, matching strings are
2909 collected into the `*Occur*' buffer without line numbers. If there
2910 are parenthesized subexpressions in the specified regexp, `occur'
2911 reads replacement text that may contain \\& and \\N whose convention
2912 follows `replace-match'.
2915 * Changes in Specialized Modes and Packages in Emacs 24.1
2917 ** Archive Mode has basic support for browsing and updating 7z archives.
2921 *** BibTeX mode now supports biblatex.
2922 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2923 `bibtex-entry-field-alist' is now an obsolete alias for
2924 `bibtex-BibTeX-entry-alist'.
2926 *** New command `bibtex-search-entries', bound to C-c C-a.
2928 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2930 *** New variable `bibtex-search-entry-globally'.
2934 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2936 *** The default browser used by the package is now the "xdg-open" program,
2937 on platforms that support it. This calls your desktop's preferred browser.
2941 *** Support for musical notes.
2943 *** Support for logarithmic units.
2945 *** No longer uses the tex prefix for TeX specific unit names when
2946 using TeX or LaTeX mode.
2948 *** New option to highlight selections using faces.
2950 *** `calc-histogram' has the option of using a vector to determine the bins.
2952 *** New "O" option prefix.
2954 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2956 ** Calendar, Diary, and Appt
2958 *** Diary entries can contain non-printing "comments".
2959 See the variable `diary-comment-start'.
2961 *** Appointments can specify their individual warning times.
2962 See the variable `appt-warning-time-regexp'.
2964 *** The function specified by `appt-disp-window-function' may be passed
2965 lists of arguments if multiple appointments are due at similar times.
2966 If you are using a custom function for this, you should update it.
2968 *** New function `diary-hebrew-birthday'.
2970 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2971 may no longer be nil, but must all be strings.
2973 *** The obsolete (since Emacs 22.1) method of enabling the appt
2974 package by adding `appt-make-list' to `diary-hook' has been removed.
2975 Use `appt-activate' instead.
2977 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2978 appt-issue-message (use the function appt-activate)
2979 appt-visible/appt-msg-window (use the variable appt-display-format)
2981 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2982 view-diary-entries, list-diary-entries, show-all-diary-entries
2986 *** New feature to "guess" the style in an existing buffer.
2987 The main entry point is M-x c-guess.
2989 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2991 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2992 Thus C-M-a will, by default, go to the beginning of the immediate function,
2995 *** "Macros with semicolons" can be registered for correct indentation.
2996 Where such a macro ends a line (no semicolon) the next statement is no longer
2997 parsed as a statement continuation.
2999 ** Comint and modes derived from it use the standard completion code.
3003 *** Compilation mode can be used without Font Lock mode.
3004 `compilation-parse-errors-function' is now obsolete.
3006 *** New variable `compilation-filter-start', which is bound while
3007 `compilation-filter-hook' runs. It records the start position of the
3008 text inserted by `compilation-filter'.
3010 *** `compilation-error-screen-columns' and `compilation-first-column'
3011 are obeyed in the editing buffer. So programming language modes can
3012 set them, whereas previously only the value in the *Compilation*
3017 *** Customize buffers now contain a search field.
3018 The search is performed using `customize-apropos'.
3019 To turn off the search field, set `custom-search-field' to nil.
3021 *** Options in customize group buffers start out hidden if not customized.
3022 Use the arrow to the left of the option name to toggle visibility.
3024 *** custom-buffer-sort-alphabetically now defaults to t.
3026 *** The color widget now has a "Choose" button, which allows you to
3027 choose a color via `list-colors-display'.
3031 *** It is now possible to access buses other than the default system
3034 *** The `dbus-register-method' and `dbus-register-property' functions
3035 optionally do not register names.
3037 *** The new function `dbus-register-service' registers a known service
3038 name on a D-Bus without also registering a property or a method.
3042 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3043 if called with a prefix argument, read a file name from the minibuffer
3044 instead of using the current buffer.
3046 *** The "dired local variables" feature of Dired-x is obsolete.
3047 The standard directory local variables feature replaces it.
3051 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3052 controlling attempts to autojoin a channel.
3054 *** New variable `erc-coding-system-precedence': If we use `undecided'
3055 as the server coding system, this variable will then be consulted.
3056 The default is to decode strings that can be decoded as utf-8 as
3057 utf-8, and do the normal `undecided' decoding for the rest.
3061 *** The default value of `eshell-directory-name' has changed
3062 to be an "eshell" directory in `user-emacs-directory'.
3063 The old "~/.eshell/" directory is still used if it exists, though.
3067 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3068 It now supports multithread non-stop debugging and simultaneous
3069 debugging of several threads.
3073 *** RET (`image-toggle-animation') toggles animation, if applicable.
3074 Animation plays once, unless the option `image-animate-loop' is non-nil.
3078 *** New command M-x info-display-manual displays a named Info manual.
3079 If that manual is already visited in some Info buffer, it displays
3080 that buffer. (This is handy if you have many manuals in many *info*
3081 buffers, and don't remember the name of the buffer visiting the manual
3082 you want to consult.) Otherwise, it loads and displays the manual.
3084 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3085 This is for compatibility with the stand-alone Info reader program,
3086 and also because `Info-edit' is a rarely used command that is disabled
3089 ** Mail mode changes (not Message mode)
3091 *** New command M-x mail-add-attachment for adding MIME attachments
3093 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3094 (Its name is misleading, since it has nothing to do with MIME
3095 attachments.) The old name is now an obsolete alias to the new name.
3097 ** MH-E has been updated to MH-E version 8.3.1.
3098 See MH-E-NEWS for details.
3100 ** Modula-2 mode provides auto-indentation.
3102 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3104 ** nXML mode no longer binds C-RET to `nxml-complete'.
3105 Completion is now performed via `completion-at-point', bound to C-M-i
3106 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3107 default), this performs tag completion.
3109 ** Org mode has been updated to version 7.8.09.
3110 See ORG-NEWS for details.
3112 ** Prolog mode has been completely revamped, with lots of additional
3113 functionality such as more intelligent indentation, electricity,
3114 support for more variants, including Mercury, and a lot more.
3118 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3119 in the Rmail incoming message.
3121 *** The variable `rmail-message-filter' no longer has any effect.
3122 This change was made in Emacs 23.1 but was not advertised at the time.
3123 Try using `rmail-show-message-hook' instead.
3127 *** M-x shell prompts for the shell path name if the default directory
3128 is a remote file name and neither the environment variable $ESHELL nor
3129 the variable `explicit-shell-file-name' is set.
3131 *** TAB is now bound to the standard `completion-at-point' command,
3132 which now implements the pcomplete rules for shell command completion.
3136 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3137 if the mail server supports them. This uses either built-in GnuTLS
3138 support, or the starttls.el library. Customize `smtpmail-stream-type'
3141 *** The variable `smtpmail-auth-credentials' has been removed.
3142 By default, the information is now stored in the file ~/.authinfo.
3143 This was the default value of smtpmail-auth-credentials. If you had
3144 customized smtpmail-auth-credentials to a list of user names and
3145 passwords, those settings are not used. During your first connection
3146 to the smtp server, Emacs will prompt for the user name and password,
3147 and offer to save them to ~/.authinfo. Or you can manually copy the
3148 credentials to ~/.authinfo. For example, if you had
3150 (setq smtpmail-auth-credentials
3151 '(("mail.example.org" 25 "jim" "s!cret")))
3153 then the equivalent line in ~/.authinfo would be
3155 machine mail.example.org port 25 login jim password s!cret
3157 See the auth-source manual for more information, e.g. on encrypting
3158 the credentials file.
3160 *** The variable `smtpmail-starttls-credentials' has been removed.
3161 If you had that set, you need to put
3163 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3165 in your ~/.authinfo file instead.
3167 *** SMTPmail defaults to using the address in the From: header as the
3168 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3169 to the address you wish to use instead.
3173 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3174 and `sql-oracle-scan-on'.
3176 *** New options controlling prompting for login parameters.
3177 Each supported product has a custom variable `sql-*-login-params',
3178 which is a list of the parameters to be prompted for before a
3179 connection is established.
3181 *** The command `sql-product-interactive' now takes a prefix argument,
3182 which causes it to prompt for an SQL product.
3184 *** Product-specific SQL interactive commands now take prefix arguments.
3185 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3186 given a prefix argument, prompt for a name for the SQL interactive
3187 buffer. This reduces the need for calling `sql-rename-buffer'.
3189 *** SQL interactive modes suppress command continuation prompts, and
3190 replace tabs with spaces. The first change impacts multiple line SQL
3191 statements entered with C-j between each line, statements yanked into
3192 the buffer and statements sent with `sql-send-*' functions. The
3193 second prevents the MySQL and Postgres interpreters from listing
3194 object name completions when sent text via `sql-send-*' functions.
3196 *** New command `sql-connect' starts a predefined SQLi session,
3197 using the login parameters from `sql-connection-alist'.
3199 *** New "Save Connection" menu item in SQLi buffers.
3200 This gathers the login params specified for the SQLi session, if it
3201 was not started by a connection, and saves them as a new connection.
3203 *** New commands for listing database objects and details:
3204 sql-list-all and sql-list-table.
3206 *** An API for manipulating SQL product definitions has been added.
3210 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3214 *** New inline access method "ksu" (kerberized su).
3216 *** The following access methods are discontinued: "ssh1_old",
3217 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3219 *** The user option `remote-file-name-inhibit-cache' controls whether
3220 remote file attributes are cached for better performance.
3222 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3223 default value to "".
3225 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3226 for remote machines which support SELinux.
3228 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3229 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3230 the degree of parallelism.
3232 ** VC and related modes
3234 *** Support for pulling on distributed version control systems.
3235 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3236 supported (currently with Bzr, Git, and Mercurial), to update the
3237 current branch and working tree. A prefix argument means to prompt
3238 the user for specifics, e.g. a pull location.
3240 *** `vc-update' is now an alias for `vc-pull'.
3242 *** Support for merging on distributed version control systems.
3243 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3244 is supported (currently with Bzr, Git, and Mercurial), to merge
3245 changes from another branch into the current one. It prompts for
3246 specifics, e.g. a merge source.
3248 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3249 shows a diff while querying the user. It defaults to t.
3251 *** Log entries in some Log View buffers can be toggled to display a
3252 longer description by typing RET (log-view-toggle-entry-display).
3253 This is currently supported for Bzr, Git, and Mercurial (to support
3254 another backend, define a `log-view-expanded-log-entry-function').
3255 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3256 use this to display the full log entry for the revision at point.
3258 *** New command `vc-ediff' allows visual comparison of two revisions
3259 of a file similar to `vc-diff', but using ediff backend.
3261 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3262 this was not advertised at the time.
3264 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3265 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3266 this was not advertised at the time.
3272 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3274 *** partial-completion-mode (complete.el) is obsolete.
3275 You can get a comparable behavior with:
3276 (setq completion-styles '(partial-completion initials))
3277 (setq completion-pcm-complete-word-inserts-delimiters t)
3279 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3281 *** pgg is obsolete (use EasyPG instead).
3283 *** sregex.el is obsolete, since rx.el is a strict superset.
3285 *** s-region.el and pc-select.el are obsolete.
3286 They are superseded by shift-select-mode, enabled by default since 23.1.
3288 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3292 *** The Landmark game is now invoked with `landmark', not `lm'.
3293 Its functions and variables have been similarly renamed.
3295 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3296 (This interfered with cua-mode.)
3298 *** f90.el has some support for Fortran 2008 syntax.
3300 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3302 *** New command `nato-region' converts text to NATO phonetic alphabet.
3305 * New Modes and Packages in Emacs 24.1
3307 ** Occur Edit mode applies edits made in *Occur* buffers to the
3308 original buffers. It is bound to "e" in Occur mode.
3310 ** New global minor mode electric-pair-mode.
3311 When enabled, typing an open parenthesis automatically inserts the
3312 matching closing one.
3314 ** New global minor mode electric-indent-mode.
3315 When enabled, typing certain characters triggers reindentation.
3316 Major modes wishing to use this can set electric-indent-chars or
3317 electric-indent-functions.
3319 ** New global minor mode electric-layout-mode.
3320 When enabled, typing certain characters automatically inserts newlines.
3321 Major modes wishing to use this can set electric-layout-rules.
3323 ** tabulated-list.el provides a generic major mode for tabulated data,
3324 from which other modes can be derived.
3326 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3328 ** secrets.el is an implementation of the Secret Service API, an
3329 interface to password managers like GNOME Keyring or KDE Wallet. The
3330 Secret Service API requires D-Bus for communication. The command
3331 `secrets-show-secrets' offers a buffer with a visualization of the
3334 ** notifications.el provides an implementation of the Desktop
3335 Notifications API. It requires D-Bus for communication.
3337 ** soap-client.el supports access to SOAP web services from Emacs.
3338 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3340 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3342 ** New emacs-lock.el package.
3343 The previous version has been moved to obsolete/old-emacs-lock.el.
3344 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3345 against exiting Emacs and killing the buffer can be set separately.
3346 The mechanism for automatically turning off protection for buffers
3347 with dead inferior processes has been generalized.
3350 * Incompatible Lisp Changes in Emacs 24.1
3352 ** Passing a nil argument to a minor mode function call now ENABLES
3353 the minor mode unconditionally. This is so that you can write e.g.
3355 (add-hook 'text-mode-hook 'foo-mode)
3357 to enable foo-mode in Text mode buffers, removing the need for
3358 `turn-on-foo-mode' style functions. This affects all mode commands
3359 defined by `define-minor-mode'. If called interactively, the mode
3360 command still toggles the minor mode.
3362 ** The return value of `backup-buffer' has changed.
3363 It is now a list of three elements, where the second element is a list
3364 describing the original file's SELinux context. If Emacs or the
3365 system lacks SELinux support, the context list is (nil nil nil nil).
3366 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3368 ** `char-direction-table' and the `char-direction' function were deleted.
3369 They were buggy and inferior to the new support of bidirectional
3370 editing introduced in Emacs 24. If you need the bidirectional
3371 properties of a character, use `get-char-code-property' with the last
3372 argument `bidi-class'.
3374 ** `copy-directory' now copies the source directory as a subdirectory
3375 of the target directory, if the latter is an existing directory. The
3376 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3377 the contents directly into a pre-existing target directory.
3379 ** For mouse click input events in the text area, the Y pixel
3380 coordinate in the POSITION list now counts from the top of the text
3381 area, excluding any header line. Previously, it counted from the top
3384 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3385 been further reduced. Now a backquote not followed by a space is
3386 always treated as a "new-style" backquote. Please remove all
3387 "old-style" backquotes from your code. If your code uses backquotes
3388 as documented in the Elisp manual, and compiles without warning, then
3389 you have nothing to do in this regard. Code not following the
3390 appropriate conventions may fail to compile.
3392 The most common cause of trouble seems to be an old-style backquote
3393 followed by a newline. Another cause of trouble is vector notation
3394 for key sequence notation: instead of [(control ,)] and [(control ')],
3395 you should write [(control ?,)] and [(control ?')], which will work in
3398 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3399 was not advertised at the time. The function `custom-initialize-delay'
3400 replaced all known uses.
3402 ** `view-buffer' now treats special mode-class in the same way that
3403 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3404 major mode is special).
3406 ** Menu and tool bar changes
3408 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3409 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3410 With these alist entries omitted, `make-frame' checks the value of the
3411 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3412 a menu-bar or tool-bar, respectively. If the alist entries are added,
3413 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3415 *** The menu bar bindings's caches are not used any more.
3416 Use (where-is-internal <def> nil t) instead.
3418 ** Regions created by mouse dragging are now normal active regions,
3419 similar to those created by shift-selection (see Selection changes
3420 above). In previous Emacs versions, these regions were delineated by
3421 `mouse-drag-overlay'; that variable has been removed.
3423 ** The fourth argument of `filter-buffer-substring' has been removed.
3424 If you want to remove text properties from the final result, simply
3425 pass the result through substring-no-properties.
3427 ** cl.el no longer provides `cl-19'.
3429 ** The following obsolete functions and aliases have been removed
3430 (the appropriate new function is given in parentheses; "not needed"
3431 means you can just remove all calls to the function in question):
3433 *** `comint-kill-output' (`comint-delete-output')
3434 *** `decompose-composite-char' (`char-to-string')
3435 *** `outline-visible' (`outline-invisible-p')
3436 *** `internal-find-face' (`facep')
3437 *** `internal-get-face' (`facep and check-face')
3438 *** `frame-update-faces' (not needed)
3439 *** `frame-update-face-colors' (`frame-set-background-mode')
3440 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3441 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3442 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3443 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3444 *** `x-make-font-unbold' (`make-face-unbold')
3445 *** `x-make-font-unitalic' (`make-face-unitalic')
3446 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3447 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3448 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3449 *** `char-bytes' (== 1)
3450 *** `isearch-return-char' (`isearch-printing-char')
3451 *** `make-local-hook' (not needed)
3452 *** `set-screen-height' (`set-frame-height')
3453 *** `set-screen-width' (`set-frame-width')
3455 ** The following obsolete variables and varaliases have been removed
3456 (the appropriate new variable is given in parentheses):
3458 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3459 *** `vc-header-alist' (`vc-BACKEND-header')
3460 *** `directory-sep-char' (== ?/)
3461 *** `font-lock-defaults-alist' (`font-lock-defaults')
3462 *** `e' (`float-e').
3464 ** The following obsolete files were removed:
3465 sc.el, x-menu.el, rnews.el, rnewspost.el
3467 ** The format of the finder-inf.el file has changed, since the Finder
3468 mechanism is now based on the package system. The variable
3469 `finder-package-info' is replaced by `package--builtins' and
3470 `finder-keywords-hash'.
3472 ** When generating autoloads, `update-directory-autoloads' no longer
3473 assumes every inspected file is in your `load-path'. It instead
3474 generates relative names according to the current `load-path'.
3477 * Lisp Changes in Emacs 24.1
3479 ** Code can now use lexical scoping by default instead of dynamic scoping.
3480 The `lexical-binding' variable enables lexical scoping for local
3481 variables. It is typically set via a file-local variable in the first
3482 line of the file, in which case it applies to all the code in that
3485 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3486 binding instead of the old dynamic binding mode.
3488 *** Lexically scoped interpreted functions are represented with a new form
3489 of function value which looks like (closure ENV ARGS &rest BODY).
3491 *** New macro `letrec' to define recursive local functions.
3493 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3494 So do `defcustom' and other forms that call `defvar' as a subroutine.
3496 *** New function `special-variable-p' to check whether a variable is
3497 declared as dynamically bound.
3499 *** The form ((lambda ...) ...) is deprecated.
3501 ** An Emacs Lisp testing tool is now included.
3502 Emacs Lisp developers can use this tool to write automated tests for
3503 their code. See the ERT info manual for details.
3505 ** Changes for bidirectional display and editing
3507 *** New function `current-bidi-paragraph-direction'.
3508 This returns the base direction of the paragraph at point.
3510 *** New function `bidi-string-mark-left-to-right'.
3511 Given a string containing characters from right-to-left scripts, this
3512 function returns another string which can be safely inserted into a
3513 buffer, such that any following text will be always displayed to the
3514 right of that string. (This works by appending an invisible Unicode
3515 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3517 This is useful when the buffer has overall left-to-right paragraph
3518 direction and you need to insert a string whose contents are not known
3519 in advance, without disrupting the layout of the line.
3523 *** Window tree functions are accessible in Elisp.
3524 Functions are provided to return the parent, siblings or child windows
3525 of any window including internal windows (windows not associated with a
3526 buffer) in the window tree.
3528 **** New function `window-valid-p' gives non-nil for live and internal
3531 **** Window manipulation can deal with internal windows.
3532 Many window handling functions like `split-window', `delete-window', or
3533 `delete-other-windows' as well as the window resizing functions can now
3534 act on any window including internal ones.
3536 *** window-total-height/-width vs window-body-height/-width.
3537 The function `window-height' has been renamed to `window-total-height'
3538 and `window-width' has been renamed to `window-body-width'. The old
3539 names are provided as aliases. Two new functions `window-total-width'
3540 and `window-body-height' are provided.
3542 *** Window parameters specific to window handling functions.
3543 For each window you can specify a parameter to override the default
3544 behavior of a number of functions like `split-window', `delete-window'
3545 and `delete-other-windows'. The variable `ignore-window-parameters'
3546 allows to ignore processing such parameters.
3548 *** New semantics of third argument of `split-window'.
3549 The third argument of `split-window' has been renamed to SIDE and can be
3550 set to any of the values 'below, 'right, 'above, or 'left to make the
3551 new window appear on the corresponding side of the window that shall be
3552 split. Any other value of SIDE will cause `split-window' to split the
3553 window into two side-by-side windows as before.
3555 *** Window resizing functions.
3556 A new standard function for resizing windows called `window-resize' has
3557 been introduced. This and all other functions for resizing windows no
3558 longer delete any windows when they become too small.
3560 *** Deleting the selected window now selects the most recently selected
3561 live window on that frame instead.
3563 *** `adjust-window-trailing-edge' adjustments.
3564 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3565 is able to resize other windows if a window adjacent to the trailing
3566 edge cannot be shrunk any more. This makes its behavior more similar to
3567 that of Emacs 21 without compromising, however, its inability to delete
3568 windows which was introduced in Emacs 22.
3570 *** Window-local buffer lists.
3571 Windows now have local buffer lists. This means that removing a buffer
3572 from display in a window will preferably show the buffer previously
3573 shown in that window with its previous window-start and window-point
3574 positions. This also means that the same buffer may be automatically
3575 shown twice even if it already appears in another window.
3577 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3578 which if non-nil requires the buffer to be displayed in the currently
3579 selected window, signaling an error otherwise. If nil, another window
3580 can be used, e.g. if the selected one is strongly dedicated.
3582 *** `split-window-vertically' and `split-window-horizontally' renamed
3583 to `split-window-below' and `split-window-right' respectively.
3584 The old names are kept as aliases.
3588 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3589 named ACTION, and takes a display action of the same form as
3590 `display-buffer-base-action' (see Changes, above). A non-nil,
3591 non-list value is treated specially, as the old meaning.
3593 **** New variable `display-buffer-overriding-action'.
3595 **** The procedure of `display-buffer' etc. to choose a window is
3596 determined by combining `display-buffer-overriding-action',
3597 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3598 and `display-buffer-fallback-action'. The second and fourth of these
3599 are user-customizable variables.
3601 See the docstring of `display-buffer' for details.
3603 *** New functions `window-state-get' and `window-state-put'.
3604 These functions allow to save and restore the state of an arbitrary
3605 frame or window as an Elisp object.
3609 *** New variable `completion-extra-properties' used to specify extra
3610 properties of the current completion:
3611 - :annotate-function, same as the old completion-annotate-function.
3612 - :exit-function, function to call after completion took place.
3614 *** Functions on `completion-at-point-functions' can return any of the
3615 properties valid for `completion-extra-properties'.
3617 *** `completion-annotate-function' is obsolete.
3619 *** New `metadata' method for completion tables. The metadata thus returned
3620 can specify various details of the data returned by `all-completions':
3621 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3622 used to select a style in completion-category-overrides.
3623 - `annotation-function' to add annotations in *Completions*.
3624 - `display-sort-function' to specify how to sort entries in *Completions*.
3625 - `cycle-sort-function' to specify how to sort entries when cycling.
3627 *** `minibuffer-local-filename-must-match-map' is not used any more.
3628 Instead, the bindings in `minibuffer-local-filename-completion-map'
3629 are combined with `minibuffer-local-must-match-map'.
3631 *** New variable `completing-read-function' allows overriding the
3632 behavior of `completing-read'.
3634 ** `glyphless-char-display' can now distinguish between graphical and
3635 text terminal display, via a char-table entry that is a cons cell.
3637 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3638 Instead, the offending function is removed.
3642 *** New function `run-hook-wrapped' for running an abnormal hook by
3643 passing the hook functions as arguments to a "wrapping" function.
3644 Like `run-hook-with-args-until-success', it stops at the first
3645 non-nil return value.
3647 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3648 set of "wrapping" filters, similar to around advice.
3649 (A version of this macro was actually added in Emacs 23.2 but was not
3650 advertised at the time.)
3654 *** New macro `condition-case-unless-debug' (this was actually added in
3655 Emacs 23.1 as condition-case-no-debug, but not advertised)
3657 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3659 *** Variable `stack-trace-on-error' removed.
3661 *** The debugger can now "continue" from an error, which means it will
3662 jump to the error handler as if the debugger had not been invoked
3663 instead of jumping all the way to the top-level.
3665 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3666 This can be useful when `inhibit-quit' is set.
3668 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3669 named Emacs server instances.
3671 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3672 to redirect STDOUT to a file.
3674 ** The function `format-time-string' now supports the %N directive,
3675 for higher-resolution time stamps.
3677 ** New input reading functions
3679 *** New function `read-char-choice' reads a restricted set of
3680 characters, discarding any inputs not inside the set.
3682 *** The command `read-color' now requires a match for a color name
3683 or RGB triplet, instead of signaling an error if the user provides
3686 **** `facemenu-read-color' is now an alias for `read-color'.
3688 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3689 The variable is now used to load all kind of supported dynamic libraries,
3690 not just image libraries. The previous name is still available as an
3693 ** Syntax parsing changes
3695 *** New variable `syntax-propertize-function'.
3696 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3697 This allows syntax-table properties to be set independently from font-lock:
3698 just call syntax-propertize to make sure the text is propertized.
3699 Together with this new variable come a new hook
3700 syntax-propertize-extend-region-functions, as well as two helper functions:
3701 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3702 as-is; and syntax-propertize-rules which provides a new way to specify
3705 *** Syntax tables support a new "comment style c" additionally to style b.
3707 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3709 ** frame-local variables cannot be let-bound any more.
3711 ** Major and minor mode changes
3713 *** `set-auto-mode' now respects mode: local variables at the end of files,
3714 as well as those in the -*- line.
3716 *** `prog-mode' is a new major mode from which programming modes
3719 **** `prog-mode-hook' can be used to enable features for programming
3720 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3721 on-the-fly spell checking for comments and strings.
3723 *** New hook `change-major-mode-after-body-hook', run by
3724 `run-mode-hooks' just before any other mode hooks.
3726 *** Enabled globalized minor modes can be disabled in specific major modes.
3727 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3728 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3730 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3732 ** File-handling changes
3734 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3735 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3736 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3737 argument is supplied (see Trash changes, above).
3739 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3741 ** Tool-bars can display separators.
3742 Tool-bar separators are handled like menu separators in menu-bar maps,
3743 i.e. via menu entries of the form `(menu-item "--")'.
3747 *** Animated images support (currently animated gifs only).
3749 **** `image-animated-p' returns non-nil if an image can be animated.
3751 **** `image-animate' animates a supplied image spec.
3753 **** `image-animate-timer' returns the timer object for an image that
3756 *** `image-extension-data' has been renamed to `image-metadata'.
3757 The old name is an obsolete alias to the new one.
3759 *** Image mode can view any image type that ImageMagick supports.
3760 This requires Emacs to be built with ImageMagick support.
3762 **** New function `imagemagick-types', defined if ImageMagick support
3763 is enabled, returns a list of image file extensions that your
3764 ImageMagick installation supports.
3766 **** New function `imagemagick-register-types' enables ImageMagick
3767 image types in Image mode and in `create-image' and other helper
3770 **** New option `imagemagick-types-inhibit' excludes certain
3771 ImageMagick image types from `imagemagick-register-types'.
3773 **** With ImageMagick support, there are extra Image mode commands to
3774 resize and rotate images: `image-transform-fit-to-height',
3775 `image-transform-fit-to-width', `image-transform-set-rotation', and
3776 `image-transform-set-scale'.
3778 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3779 passes it to the mail user agent function. This argument specifies an
3780 action for returning to the caller after finishing with the mail. For
3781 example, this is used by Rmail to optionally delete a mail window.
3783 ** XML and HTML parsing
3784 If Emacs is compiled with libxml2 support, there are two new
3785 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3786 and `libxml-parse-xml-region' (which parses XML). Both return an
3787 Emacs Lisp parse tree.
3789 ** Networking and encryption changes
3791 *** `open-network-stream' can now be used to open an encrypted stream.
3792 It now accepts an optional `:type' parameter for initiating a TLS
3793 connection, directly or via STARTTLS. To do STARTTLS, additional
3794 parameters (`:end-of-command', `:success', `:capabilities-command')
3795 must also be supplied.
3797 *** New library gnutls.el.
3798 The new function `gnutls-available-p' returns non-nil if Emacs is
3799 built with GnuTLS support. The main entry points are
3800 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3801 these functions through `open-network-stream', because that can
3802 upgrade connections through STARTTLS opportunistically or use plain
3803 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3806 *** New primitive `secure-hash' that supports many secure hash algorithms:
3807 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3808 sha1.el has been removed. The `sha1' feature is provided by default.
3812 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3814 ** Progress reporters can now "spin".
3815 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3816 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3817 time you call `progress-reporter-update' on that progress reporter,
3818 with a nil or omitted VALUE argument, the reporter message is
3819 displayed with a "spinning bar".
3821 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3822 being reverted, even if the buffer has a local `revert-buffer-function'.
3824 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3825 If delayed-warnings-list is non-nil, the command loop calls
3826 `delayed-warnings-hook' after `post-command-hook'. At present, this
3827 is only used by Emacs on some platforms to display warnings during
3828 startup, which might otherwise not be noticed. This uses the
3829 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3831 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3833 ** New function `make-composed-keymap' that constructs a new keymap
3834 from multiple input maps. You can use this to make a keymap that
3835 inherits from multiple maps, eg:
3836 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3838 ** New function `string-prefix-p'.
3839 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3841 ** New reader macro ## that stands for the empty symbol.
3842 This means that the empty symbol can now be read back. Also, #: by itself
3843 (when not immediately followed by a possible symbol character) stands for
3844 an empty uninterned symbol.
3846 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3848 ** The following functions and variables are obsolete:
3850 *** `tooltip-use-echo-area' is obsolete.
3851 Rather than setting this to t, disable Tooltip mode instead.
3853 *** buffer-substring-filters is obsolete.
3854 Use `filter-buffer-substring-functions' instead.
3856 *** `byte-compile-disable-print-circle' is obsolete.
3858 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3859 Use `post-command-hook' instead.
3861 *** `font-lock-maximum-size' is obsolete.
3864 * Changes in Emacs 24.1 on Non-Free Operating Systems
3866 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3867 and also when HOME is set to C:\ by default.
3869 ** New configure.bat options
3871 *** --enable-checking builds Emacs with extra runtime checks.
3873 *** --distfiles specifies files to be included in binary distribution.
3875 *** --without-gnutls disables automatic GnuTLS detection.
3877 *** --lib for general library linkage, works with the USER_LIBS build variable.
3879 ** New make target `dist' to create binary distribution for MS Windows.
3881 ** The Lisp function `w32-default-color-map' is now obsolete.
3882 (It is only used internally in the Emacs C code.)
3884 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3885 reappear on mouse-over. (Requires OS X 10.6 or later.)
3887 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3888 other platforms, rather than inserting its contents into the buffer.
3891 ----------------------------------------------------------------------
3892 This file is part of GNU Emacs.
3894 GNU Emacs is free software: you can redistribute it and/or modify
3895 it under the terms of the GNU General Public License as published by
3896 the Free Software Foundation, either version 3 of the License, or
3897 (at your option) any later version.
3899 GNU Emacs is distributed in the hope that it will be useful,
3900 but WITHOUT ANY WARRANTY; without even the implied warranty of
3901 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3902 GNU General Public License for more details.
3904 You should have received a copy of the GNU General Public License
3905 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3910 paragraph-separate: "[
\f]*$"