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'.
32 ** Emacs can now be compiled with file notification support.
33 This happens by default if a suitable system library is found at
34 build time. To prevent this, use the configure option
35 `--without-file-notification'. See below for file-notify features.
36 FIXME? This feature is not available for the Nextstep port. (?)
39 ** The configure option `--without-compress-info' has been generalized,
40 and renamed to `--without-compress-install'. It now prevents compression
41 of _any_ files during installation.
44 ** The configure option `--with-crt-dir' has been removed.
45 It is no longer needed, as the crt*.o files are no longer linked specially.
48 ** Directories passed to configure option `--enable-locallisppath' are
49 no longer created during installation.
51 ** Emacs can be compiled with zlib support.
52 If this library is present (which it normally is on most systems), the
53 function `zlib-decompress-region' becomes available, which can
54 decompress gzip- and zlib-format compressed data.
57 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
58 This requires pkg-config to be available at configure time.
61 * Startup Changes in Emacs 24.4
64 ** When initializing `load-path', an empty element in the EMACSLOADPATH
65 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
66 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
67 load-path (the one that would have been used if EMACSLOADPATH was unset).
68 This makes it easier to _extend_ the load-path via EMACSLOADPATH
69 (previously, EMACSLOADPATH had to specify the complete load-path,
70 including the defaults). (In older versions of Emacs, an empty element
71 was replaced by ".", so use an explicit "." now if that is what you want.)
74 ** The -L option, which normally prepends its argument to load-path,
75 will instead append, if the argument begins with `:' (or `;' on MS Windows;
76 i.e., `path-separator').
79 ** If you use either site-load.el or site-init.el to customize the dumped
80 Emacs executable, any changes to `load-path' that these files make
81 will no longer be present after dumping. To affect a permanent change
82 to `load-path', use the `--enable-locallisppath' option of `configure'.
85 ** The user option `initial-buffer-choice' can now specify a function
86 to set up the initial buffer.
89 * Changes in Emacs 24.4
92 ** New option `gnutls-verify-error', if non-nil, means that Emacs
93 should reject SSL/TLS certificates that GnuTLS determines as invalid.
94 (This option defaults to nil at present, but this is expected to change
98 ** Emacs now supports menus on text-mode terminals.
99 If the terminal supports a mouse, clicking on the menu bar, or on
100 sensitive portions of the mode line or header line, will drop down the
101 menu defined at that position. Likewise, clicking C-mouse-2 or
102 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
105 If the text terminal does not support a mouse, you can activate the
106 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
108 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
109 customize the option `tty-menu-open-use-tmm' to a non-nil value.
110 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
114 ** The *Messages* buffer is created in `messages-buffer-mode',
115 a new major mode, with read-only status. Any code that might create
116 the *Messages* buffer should call the function `messages-buffer' to do
117 so and set up the mode.
119 ** Emacs now supports ACLs (access control lists).
121 *** Emacs preserves the ACL entries of files when backing up.
123 *** New functions `file-acl' and `set-file-acl' get and set the ACL
124 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
125 libacl. On MS-Windows, the NT Security APIs are used to emulate the
126 POSIX ACL interfaces.
128 ** Multi-monitor support has been added.
130 *** New functions `display-monitor-attributes-list' and
131 `frame-monitor-attributes' can be used to obtain information about
132 each physical monitor on multi-monitor setups.
134 *** The functions `display-pixel-width' and `display-pixel-height' now
135 behave consistently among the platforms: they return the pixel width
136 or height for all physical monitors associated with the given display
137 as if they were on X11. To get information for each physical
138 monitor, use the new functions above. Similar notes also apply to
139 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
140 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
143 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
144 You can change the default by customizing `blink-cursor-blinks'.
147 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
148 This affects View mode, etc.
153 *** The command `apropos-variable' is renamed to `apropos-user-option'.
154 `apropos-user-option' shows all user options while `apropos-variable'
155 shows all variables. When called with a universal prefix argument,
156 the two commands swap their behaviors. When `apropos-do-all' is
157 non-nil, they output the same results.
160 *** The key `?' now describes prefix bindings, like `C-h'.
163 *** The command `describe-function' has been extended for EIEIO.
164 Running it on constructors will show a full description of the
165 generated class. For generic functions, it will show all
166 implementations together with links to the source. The old commands
167 `describe-class', `describe-constructor' and `describe-generic' were
171 *** The function `quail-help' is no longer an interactive command.
172 Use `C-h C-\' (`describe-input-method') instead.
177 *** ImageMagick images now support the :max-width and :max-height keywords.
180 *** When using `create-image' with image data, you can pass a :format
181 attribute (via the property-list argument) in order to help
182 ImageMagick detect the image type. The value should be a MIME
183 content-type that is found in the new variable `image-format-suffixes'.
185 ** Frame and window changes
188 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
189 bound to <f11> and M-<f10>, respectively.
192 *** New hooks `focus-in-hook', `focus-out-hook'.
193 These are normal hooks run when an Emacs frame gains or loses input focus.
196 *** Emacs can now draw dividers between adjacent windows.
197 To put dividers between side-by-side/vertically stacked windows
198 customize the frame parameter `right-divider-width'/`bottom-divider-width'
199 to some positive integer. You can drag dividers with the mouse
200 (they show a corresponding cursor when the mouse hovers over them).
201 You can change the appearance of dividers by customizing the faces
202 `window-divider', `window-divider-first-pixel', and
203 `window-divider-last-pixel'. The last two are useful to provide a 3D
204 effect, or to better distinguish dividers from surrounding display objects.
207 *** `split-window' is now a non-interactive function, not a command.
208 As a command, it was a special case of `C-x 2' (`split-window-below'),
209 and as such superfluous. After being reimplemented in Lisp, its
210 interactive form was mistakenly retained.
213 *** New option `scroll-bar-adjust-thumb-portion'.
214 Available only on X, this option allows to control over-scrolling
215 using the scroll bar (i.e. dragging the thumb down even when the end
216 of the buffer is visible).
218 ** Lisp evaluation changes
220 *** `eval-defun' on an already defined defcustom calls the :set function,
224 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
225 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
226 zero prefix argument. This disables truncation of lists in the output,
227 equivalent to setting `(eval-expression-)print-length' and
228 `(eval-expression-)print-level' to nil. Additionally, it causes integers
229 to be printed in other formats (octal, hexadecimal, and character).
232 *** New hook `eval-expression-minibuffer-setup-hook' run by
233 `eval-expression' on entering the minibuffer.
236 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
239 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
240 because it affects caching of paragraph scanning results as well.
241 There is no reason to set this to nil except for debugging purposes.
244 ** The option `set-mark-default-inactive' has been deleted.
245 This unfinished feature was introduced by accident in Emacs 23.1;
246 simply disabling Transient Mark mode does the same thing.
249 ** The default value of `comment-use-global-state' is now t,
250 and this variable has been marked obsolete.
253 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
254 and works for git too, if you fetch the repository notes.
257 ** New option `load-prefer-newer' affects how the `load' function chooses
258 the file to load. If this is non-nil, then when both .el and .elc
259 versions of a file exist, and the caller did not explicitly specify
260 which one to load, then the newer file is loaded. The default, nil,
261 means to always load the .elc file.
264 * Editing Changes in Emacs 24.4
266 ** Indentation changes
269 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
270 When invoked without a prefix argument, it now activates a transient
271 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
272 the text indentation in the region. Typing any other key resumes
273 normal editing behavior.
275 *** `electric-indent-mode' is enabled by default.
278 *** `tab-stop-list' is now implicitly extended to infinity by repeating
279 the last step. Its default value is changed to nil, which means a tab
280 stop every `tab-width' columns.
283 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
284 When called in succession, it cycles between spacing conventions:
285 one space, no spaces, original spacing.
288 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
289 a line after a one-letter word, which is an error in some typographical
290 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
293 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
295 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
296 Most commands are still unaware of it, but kill/yank do work on the rectangle.
299 ** New option `visual-order-cursor-movement'.
300 If this is non-nil, cursor motion with arrow keys will follow the
301 visual order of characters on the screen: <left> always moves to the
302 left, <right> always moves to the right, disregarding the surrounding
303 bidirectional context.
308 *** All interactive commands that read a register (`copy-to-register', etc.)
309 now display a temporary window after `register-preview-delay' seconds
310 that summarizes existing registers. To disable this, set that option to nil.
311 Interactive commands that read registers and want to make use of this
312 should use `register-read-with-preview' to read register names.
314 *** New command `frameset-to-register' bound to `C-x r f', replacing
315 `frame-configuration-to-register'. It offers similar functionality,
316 plus enhancements like the ability to restore deleted frames.
317 (`frame-configuration-to-register' still exists, but no longer has a
321 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
325 ** New command `delete-duplicate-lines'.
326 This searches the region for identical lines, and removes all but one
327 copy of each repeated line. The lines need not be sorted.
330 * Changes in Specialized Modes and Packages in Emacs 24.4
333 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
335 ~/.emacs.d/timelog replaces ~/.timelog
336 ~/.emacs.d/vip replaces ~/.vip
337 ~/.emacs.d/viper replaces ~/.viper
338 ~/.emacs.d/ido.last replaces ~/.ido.last
339 ~/.emacs.d/kkcrc replaces ~/.kkcrc
340 ~/.emacs.d/quickurls replaces ~/.quickurls
341 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
342 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
343 ~/.emacs.d/places replaces ~/.emacs-places
344 ~/.emacs.d/shadows replaces ~/.shadows
345 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
346 ~/.emacs.d/strokes replaces ~/.strokes
347 ~/.emacs.d/notes replaces ~/.notes
348 ~/.emacs.d/type-break replaces ~/.type-break
349 Also the following files used by the now obsolete otodo-mode.el:
350 ~/.emacs.d/todo-do replaces ~/.todo-do
351 ~/.emacs.d/todo-done replaces ~/.todo-done
352 ~/.emacs.d/todo-top replaces ~/.todo-top
354 ** Backtrace and debugger
357 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
358 display of local variables of the current stack frame.
360 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
361 the lexical environment when evaluating the code in the context at point
362 (and so allows you to access lexical variables).
365 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
368 ** Battery information can now be retrieved from BSD's `apm' utility.
371 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
373 ** Calendar and Diary
376 *** New faces `calendar-weekday-header', `calendar-weekend-header',
377 and `calendar-month-header'.
380 *** New option `calendar-day-header-array'.
383 *** New variable `diary-from-outlook-function', used by the command
384 `diary-from-outlook'.
387 *** The variable `calendar-font-lock-keywords' is obsolete.
392 *** Calc by default now uses the Gregorian calendar for all dates, and
393 uses January 1, 1 AD as its day number 1. Previously Calc used the
394 Julian calendar for dates before September 14, 1752, and it used
395 December 31, 1 BC as its day number 1; the new scheme is more
396 consistent with Calendar's calendrical system and day numbering.
399 *** The new option `calc-gregorian-switch' lets you configure if
400 (and when) Calc switches from the Julian to the Gregorian calendar.
403 *** Support for ISO 8601 dates.
409 **** The cpp-root project now supports executing a compile command.
410 It can be set through the new :compile-command slot or the
411 buffer-local variable `compile-command'.
413 **** Better selection of include directories for the 'linux' project.
414 Include directories now support out-of-tree build directories and
415 target architecture auto-detection.
419 **** Improved detection of used namespaces in current scope in C++.
421 **** Parsing of default values for variables and function arguments in C/C++.
422 They are also displayed by the summarize feature in the mode line.
424 **** Improved parsing of function pointers in C/C++.
425 This also includes parsing of function pointers as function arguments.
427 **** Parsing of C/C++ preprocessor macros that open new scope.
428 For example, this enables parsing of macros that open new namespaces.
430 **** Support for 'this' pointer in inline member functions in C++.
435 *** New macro `cl-tagbody'.
436 This executes statements while allowing for control transfer to labels.
439 *** letf is now just an alias for cl-letf.
444 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
445 Hence, you can now enable it independently from those modes, and from
446 `transient-mark-mode'.
449 *** `cua-highlight-region-shift-only' is now obsolete.
450 You can disable `transient-mark-mode' to get the same result.
453 *** CUA's rectangles can now be used without CUA by calling the command
454 `cua-rectangle-mark-mode'.
459 *** Support for completion, ElDoc, and Flycheck has been added.
462 *** The current CFEngine syntax is parsed from "cf-promises -s json".
463 There is a fallback syntax available if you don't have cf-promises or
464 if your version doesn't support that option. See option `cfengine-cf-promises'.
467 ** Delete Selection mode can now be used without Transient Mark mode.
471 *** `desktop-auto-save-timeout' defines the number of seconds idle time
472 before auto-save of the desktop.
474 *** `desktop-restore-frames', enabled by default, allows saving and
475 restoring the frame/window configuration (frameset). Additional options
476 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
477 and `desktop-restore-forces-onscreen' offer further customization.
480 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
481 such as file ownership or permissions, are visible.
484 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
485 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
486 The results display in the mode line.
488 ** Electric Pair mode
491 *** New option `electric-pair-preserve-balance', enabled by default.
492 If non-nil, pairing/skipping only kicks in when that help the balance
493 of parentheses and quotes, i.e. the buffer should end up at least as
496 You can further control this behavior by adjusting the predicates
497 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
500 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
501 In `electric-pair-mode', the commands `backward-delete-char' and
502 `backward-delete-char-untabify' are now bound to electric variants
503 that delete the closer when invoked between adjacent pairs.
506 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
507 In `electric-pair-mode', inserting a newline between adjacent pairs
508 opens an extra newline after point, which is indented if
509 `electric-indent-mode' is also set.
512 *** New option `electric-pair-skip-whitespace', enabled by default.
513 This controls if skipping over closing delimiters should jump over any
514 whitespace slack. Setting it to `chomp' makes it delete this
515 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
518 *** New variables control the pairing in strings and comments.
519 You can customize `electric-pair-text-pairs' and
520 `electric-pair-text-syntax-table' to tweak pairing behavior inside
521 strings and comments.
524 ** New EPA option `epa-mail-aliases'.
525 You can set this to a list of email address aliases that `epa-mail-encrypt'
526 should use to find keys.
529 ** New ERC option `erc-accidental-paste-threshold-seconds'.
530 If set to a number, this can be used to avoid accidentally pasting large
531 amounts of data into the ERC input.
534 ** New ERT macro `skip-unless' allows skipping ERT tests.
535 See the ERT manual for details.
540 *** `eshell' now supports visual subcommands and options.
541 Eshell has been able to handle "visual" commands (interactive,
542 non-line oriented commands such as top that require display
543 capabilities not provided by eshell) by running them in an Emacs
544 terminal emulator. See `eshell-visual-commands'.
546 This feature has been extended to subcommands and options that make a
547 usually line-oriented command a visual command. Typical examples are
548 "git log" and "git <command> --help", which display their output in a
549 pager by default. See `eshell-visual-subcommands' and
550 `eshell-visual-options'.
553 *** New Eshell-Tramp module.
554 External su and sudo commands are now the default; the internal,
555 Tramp-using variants can still be used by enabling the eshell-tramp
559 ** New F90 mode option `f90-smart-end-names'.
562 Icomplete is now more similar to Ido.
565 *** Icomplete by default now applies to all forms of minibuffer completion.
566 The variable `icomplete-with-completion-tables' (now a user option)
567 controls this. To restore the old behavior, set it back to
568 '(internal-complete-buffer).
571 *** You can navigate through and select completions using the keys
572 from `icomplete-minibuffer-map'.
575 *** The string that separates potential completions is now a customizable
576 option (`icomplete-separator'). The default is " | " rather than ",".
579 *** New face `icomplete-first-match'; and new options
580 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
583 *** The option `icomplete-show-key-bindings' has been removed.
588 *** An Ido user manual is now included.
591 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
592 This means to use virtual buffers if the current ido input does not match
596 *** The variable `ido-decorations' can optionally have two new elements,
597 which are the brackets to use around the sole remaining completion.
602 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
603 visit the next image file and the previous image file in the same
604 directory, respectively.
607 *** New commands to show specific frames of multi-frame images.
608 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
609 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
612 *** New commands to speed up, slow down, or reverse animation.
613 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
614 speed up and slow down the animation. `a r' (`image-reverse-speed')
615 to reverse it and `a 0' (`image-reset-speed') to reset it.
618 *** The command `image-mode-fit-frame' deletes other windows.
619 When toggling, it restores the frame's previous window configuration.
620 It also has an optional frame argument, which can be used by Lisp
621 callers to fit the image to a frame other than the selected frame.
626 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
627 the symbol found near point.
630 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
631 will cycle through faces in `hi-lock-face-defaults' without prompting.
633 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
638 *** New Info face `info-index-match', used to highlight matches in index
639 entries displayed by `Info-index-next', `Info-virtual-index' and
643 *** The Info-edit command is obsolete. Editing Info nodes by hand
644 has not been relevant for some time.
649 *** New option `js-switch-indent-offset'.
652 *** Better indentation of multiple-variable declarations.
653 If a declaration spans several lines, variables on the following lines
654 are lined up to the first one.
657 *** Recognition and better indentation of continuations in array comprehensions.
660 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
665 *** Font locking for texinfo comments and new keywords.
667 *** Completion in Octave file buffers.
671 *** Jump to definition.
673 *** Documentation lookup/search.
676 ** OPascal mode is the new name for Delphi mode
679 *** All delphi-* variables and functions have been renamed to opascal-*.
680 Obsolete aliases exist for those likely to have been used externally.
683 *** The option `delphi-newline-always-indents' has been removed.
684 Use `electric-indent-mode' instead.
687 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
692 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
693 to filter the list of packages by a keyword.
696 *** In the `describe-package' buffer, there are now buttons listing the
697 keywords related to the package. Click on a button to see other packages
698 related to that keyword.
701 *** The format of `archive-contents' files, generated by package
702 repositories, has changed to allow a new (fifth) element in the data
703 vectors, containing an associative list with extra properties.
704 (For example, `describe-package' uses the `:url' extra property to
705 display a "Homepage" header.)
708 ** In Prolog mode, `prolog-use-smie' has been removed,
709 along with the non-SMIE indentation code.
713 *** The new command `remember-notes' creates a buffer that is saved on
714 `kill-emacs'. You can think of it as a *scratch* buffer whose content
715 is preserved. In fact, it was designed as a replacement for *scratch*
716 buffer and can be used that way by setting `initial-buffer-choice' to
717 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
718 Without the second change, the *scratch* buffer will still be there
719 for notes that do not need to be preserved.
721 *** The Remember package can now store notes in separates files.
722 You can use the new function `remember-store-in-files' within the
723 `remember-handler-functions' option. See `remember-data-directory'
724 and `remember-directory-file-name-format' for new options related to
729 *** Customize `rmail-mbox-format' to influence some minor aspects of
730 how Rmail displays non-MIME messages.
733 *** The `unrmail' command now converts from BABYL to mboxrd format,
734 rather than mboxo. Customize `unrmail-mbox-format' to change this.
739 *** Improved syntax highlighting and indentation.
742 *** New `electric-indent-mode' integration.
745 *** New option `ruby-encoding-magic-comment-style'.
748 *** New option `ruby-custom-encoding-magic-comment-template'.
751 *** New option `ruby-align-to-stmt-keywords'.
754 *** New option `ruby-align-chained-calls'.
757 *** More Ruby file types have been added to `auto-mode-alist'.
759 ** Search and Replace
762 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
763 starts a symbol (identifier) incremental search forward with the
764 symbol found near point added to the search string initially.
767 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
768 and adds it to the search string.
770 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
771 between nil and the value of the option `search-invisible' (or `open'
774 *** `query-replace' skips invisible text when `search-invisible' is nil,
775 and opens overlays with hidden text when `search-invisible' is `open'.
778 *** A negative prefix arg of replacement commands replaces backward.
779 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
780 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
783 *** By default, prefix arguments do not now terminate Isearch mode.
784 Set `isearch-allow-prefix' to nil to restore old behavior.
787 *** More Isearch commands accept prefix arguments, namely
788 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
792 *** Word search now matches whitespace at the beginning/end
793 of the search string if it contains leading/trailing whitespace.
794 In an incremental word search or when using a non-nil LAX argument
795 of `word-search-regexp', the lax matching can also match part of
796 the first word (in addition to the lax matching of the last word).
797 The same rules are now applied to the symbol search with the difference
798 that it matches symbols, and non-symbol characters between symbols.
801 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
804 ** The shell.el option `explicit-bash-args' includes --noediting by default.
805 All non-ancient Bash versions support this option.
810 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
813 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
815 ** SMIE indentation can be customized via `smie-config'.
816 Emacs can learn the appropriate indentation settings if you provide it
817 with an indented sample file.
821 Improved login monitoring and appropriate response to login failures.
822 Includes `sql-login-delay' to define maximum wait for a connection.
825 SQL*Plus script placeholders are properly highlighted and identified
826 in `sql-placeholders-filter' correctly. When SQL*Plus is started,
827 options specified in `sql-oracle-options' are passed before the logon
828 parameter, as SQL*Plus expects. The default setting for
829 `sql-oracle-options' has been altered to pass the `-L' option to limit
830 the number of logon attempts per invocation.
833 ** New Term mode option `term-suppress-hard-newline'.
836 ** Todo mode has been rewritten and enhanced.
837 The Todo mode user manual describes all commands and most user
838 options. To support some of these features, a new file format is
839 used, which is incompatible with the old format; however, you can
840 convert old todo and done item files to the new format on initializing
841 the first new todo file, or at any later time with the provided
842 conversion command. The previous version of todo-mode.el has been
843 renamed to otodo-mode.el and is now obsolete. New features include:
845 *** Support for multiple todo files and archive files of done items.
847 *** Renaming, reordering, moving, merging, and deleting categories.
849 *** Sortable tabular summaries of categories and the item types they contain.
851 *** Cross-category lists of items filtered by specific criteria.
853 *** More fine-grained interaction with the Emacs diary, by being able to
854 decide for each todo item whether it appears in the Fancy Diary display.
856 *** Highly flexible new item insertion and item editing.
858 *** Moving items between categories, storing done items in their category
859 or in archive files, undoing or unarchiving done items.
861 *** Reprioritizing items by inputting a numerical priority.
863 *** Extensive customizability of operation and display, including many faces.
868 *** `trace-function' and `trace-function-background' no longer prompt for
869 the output buffer. Unless you use a prefix argument, they output to
873 *** With a prefix argument, `trace-function' and `trace-function-background'
874 will prompt for a "context". This is a Lisp expression, whose value at the
875 time the function is entered/exited is printed along with the function's
881 *** The experimental url syntax for remote file names has been removed.
884 *** New connection method "adb", which allows to access Android
885 devices by the Android Debug Bridge. The variable `tramp-adb-program'
886 can be used to adapt the path of the "adb" program, if needed.
889 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
890 "scpc" and "rsyncc" are discontinued. The ssh option
891 "ControlMaster=auto" is set automatically in all ssh-based methods,
892 when possible. See `tramp-use-ssh-controlmaster-options'.
895 *** Handlers for `file-acl' and `set-file-acl' for remote machines
896 which support POSIX ACLs.
899 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
900 for remote machines which support filesystem notifications.
903 ** New URL command `url-cookie-list' displays the current cookies,
904 and allows you to interactively remove cookies.
906 ** VC and related modes
909 *** In VC directory mode, `D' displays diffs between VC-controlled
910 whole tree revisions.
913 *** In VC directory mode, `L' lists the change log for the current VC
914 controlled tree in a window.
917 *** In VC directory mode, `I' shows a log of changes that will be
918 received with a pull operation.
921 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
922 under current version control system. When called with a prefix
923 argument, you can remove a file from the ignored file list.
928 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
931 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
934 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
935 are obsolete. Customize the `woman-*' faces instead.
940 *** iswitchb.el; use icomplete-mode.
943 *** longlines.el; use visual-line-mode.
952 *** terminal.el; use term.el instead.
955 *** the old version of todo-mode.el (renamed to otodo-mode.el).
958 *** xesam.el (owing to the cancellation of the XESAM project).
961 *** yow.el; use fortune.el or cookie1.el instead.
964 * New Modes and Packages in Emacs 24.4
967 ** New package `eww' is a built-in web browser.
968 It is only available if Emacs is compiled with libxml2 support.
971 ** New minor mode `superword-mode'.
972 This overrides the default word motion commands to treat "symbol_words"
973 as a single word, similar to what `subword-mode' does.
976 ** New package nadvice.el offers lighter-weight advice facilities.
979 *** add-function/remove-function, which can be used to add/remove code on any
980 function-carrying place, such as process-filters or `<foo>-function' hooks.
982 *** advice-add/advice-remove to add/remove a piece of advice on a named
983 function, much like `defadvice' does.
985 ** New package frameset.el.
986 It provides a set of operations to save a frameset (the state of all
987 or a subset of the existing frames and windows, somewhat similar to a
988 frame configuration), both in-session and persistently, and restore it
989 at some point in the future.
992 ** New package filenotify.el provides an interface for file system
993 notifications. It requires that Emacs be compiled with one of the
994 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
997 * Incompatible Lisp Changes in Emacs 24.4
1000 ** `kill-region' has lost its `yank-handler' optional argument.
1003 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1004 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1007 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1010 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1011 Some languages match those as »...«, and others as «...», so it is
1012 better for Emacs to stay neutral by default.
1015 ** In compiled Lisp files, the header no longer includes a timestamp.
1018 ** The default file coding for Emacs Lisp files is now utf-8.
1019 (See `file-coding-system-alist'.) In most cases, this change is
1020 transparent, but files that contain unusual characters without
1021 specifying an explicit coding system may fail to load with obscure
1022 errors. You should either convert them to utf-8 or add an explicit
1026 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1027 It used to disable the minor mode, major mode, and text-property keymaps,
1028 whereas now it simply has higher precedence.
1030 ** Default process filters and sentinels are not nil any more.
1031 Instead they default to a function that does what the nil value used to do.
1034 ** `read-event' does not return decoded chars in ttys any more.
1035 As was the case in Emacs 22 and before, the decoding of terminal
1036 input, according to `keyboard-coding-system', is not performed in
1037 `read-event' any more. But unlike in Emacs 22, this decoding is still
1038 done before input-decode-map, function-key-map, etc.
1041 ** The option `inhibit-local-menu-bar-menus' has been removed.
1044 ** Frame-local variables that affect redisplay do not work any more.
1045 More specifically, redisplay does not bother to check for a frame-local
1046 value when looking up variables.
1049 ** nil and "unbound" are indistinguishable in `symbol-function'.
1050 `symbol-function' does not signal a `void-function' error any more.
1051 To determine if a symbol's function definition is void, use `fboundp'.
1054 ** `defadvice' does not honor the `freeze' flag and cannot advise
1055 special-forms any more.
1058 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1059 when lexical binding is enabled. Previously, VAR was bound to nil,
1060 which often led to spurious unused-variable warnings.
1063 ** The return value of `backup-buffer' has changed.
1064 The second argument is no longer an SELinux context, instead it is an
1065 alist of extended attributes as returned by the new function
1066 `file-extended-attributes'. The attributes can be applied to another
1067 file using `set-file-extended-attributes'.
1070 ** By default `copy-file' no longer copies file permission bits to an
1071 existing destination; and it sets the file permission bits of a newly
1072 created destination to those of the source, masked by the default file
1073 permissions. To copy the file permission bits, pass t as the
1074 PRESERVE-PERMISSIONS argument of `copy-file'.
1077 ** `visited-file-modtime' now returns -1 for nonexistent files.
1078 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1079 in the presence of files with negative time stamps.
1082 ** The cars of the elements in `interpreter-mode-alist' are now
1083 treated as regexps rather than literal strings.
1086 * Lisp Changes in Emacs 24.4
1089 ** The second argument of `eval' can now specify a lexical environment.
1092 ** New functions `special-form-p' and `macrop'.
1094 ** New macro `define-alternatives' can be used to define generic commands.
1095 Generic commands are interactive functions whose implementation can be
1096 selected among several alternatives, as a matter of user preference.
1098 ** The `defalias-fset-function' property lets you catch `defalias'
1099 calls, and redirect them to your own function, instead of `fset'.
1102 ** New variable `enable-dir-local-variables'.
1103 Directory-local variables are ignored if this is nil. This may be
1104 useful for modes that want to ignore directory-locals while still
1105 respecting file-local variables.
1108 ** New function `get-pos-property'.
1111 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1112 as a function to call to provide default values.
1114 ** Completion changes
1116 *** The separator for `completing-read-multiple' can now be a regexp.
1117 The default separator has been changed to allow surrounding spaces
1120 *** The `common-substring' arg of `display-completion-list' is obsolete.
1121 Either use `completion-all-completions', which returns highlighted
1122 strings (including for partial or substring completion), or call
1123 `completion-hilit-commonality' to add the highlight.
1125 *** New function `completion-table-with-cache' is a wrapper for
1126 `completion-table-dynamic' that caches the result of the last lookup.
1128 *** New function `completion-table-merge' to combine several
1129 completion tables by merging their completions.
1131 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1132 let you enable symbol prettification (replacing a string like "lambda" with
1133 the Greek lambda character).
1138 *** Functions to pop up menus and dialogs now work on all terminals,
1139 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1140 `message-box', `yes-or-no-p', etc.
1142 The function `display-popup-menus-p' will now return non-nil for a
1143 display or frame whenever a mouse is supported on that display or
1146 *** New hook `tty-setup-hook'.
1150 *** New display action function `display-buffer-no-window' to not
1151 display the buffer in a window.
1153 *** New display action alist entry `allow-no-window' to indicate the
1154 caller of `display-buffer' is ready to handle the case of not
1155 displaying the buffer in a window.
1157 ** New hook `pre-redisplay-function'.
1160 ** New bool-vector set operation functions
1161 *** `bool-vector-exclusive-or'
1162 *** `bool-vector-union'
1163 *** `bool-vector-intersection'
1164 *** `bool-vector-set-difference'
1165 *** `bool-vector-not'
1166 *** `bool-vector-subsetp'
1167 *** `bool-vector-count-consecutive'
1168 *** `bool-vector-count-population'
1171 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1173 ** Error-handling changes
1176 *** New function `define-error'.
1179 *** `with-demoted-errors' takes an additional argument `format'.
1182 ** New macro `with-eval-after-load'.
1183 This is like the old `eval-after-load', but better behaved.
1186 ** New library subr-x.el with miscellaneous small utility functions
1187 *** `hash-table-keys'
1188 *** `hash-table-values'
1189 *** `string-blank-p'
1190 *** `string-empty-p'
1192 *** `string-reverse'
1193 *** `string-trim-left'
1194 *** `string-trim-right'
1196 *** `string-remove-prefix'
1197 *** `string-remove-suffix'
1200 ** Obsoleted functions
1203 *** `lisp-complete-symbol'
1204 *** `field-complete'
1205 *** `minibuffer-completion-contents'
1206 *** `isearch-nonincremental-exit-minibuffer'
1207 *** `isearch-filter-visible'
1208 *** `generic-make-keywords-list'
1209 *** `get-upcase-table' (use `case-table-get-table' instead).
1211 ** `with-wrapper-hook' is obsoleted by `add-function'.
1212 The few hooks that used with-wrapper-hook are replaced as follows:
1213 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1214 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1215 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1218 ** `byte-compile-interactive-only-functions' is now obsolete.
1219 To specify that a command should only be called interactively, give it
1220 a non-nil `interactive-only' property.
1223 ** `split-string' now takes an optional argument TRIM.
1224 The value, if non-nil, is a regexp that specifies what to trim from
1225 the start and end of each substring.
1228 ** New function `string-suffix-p'.
1230 ** File-handling changes
1233 *** Support for filesystem notifications.
1234 Emacs now supports notifications of filesystem changes, such as
1235 creation, modification, and deletion of files. This requires the
1236 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1237 MS-Windows systems, this is supported for Windows XP and newer
1241 *** The 9th element returned by `file-attributes' is now unspecified.
1242 Formerly, it was t if the file's gid would change if file were deleted
1243 and recreated. This value has been inaccurate for years on many
1244 platforms, and nobody seems to have noticed or cared.
1247 *** The 6th argument to `copy-file' has been renamed to
1248 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1249 Unix file permission bits as well as SELinux context.
1252 *** The function `file-ownership-preserved-p' now has an optional
1253 argument GROUP which causes it check for file group too. This can be
1254 used in place of the 9th element of `file-attributes'.
1257 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1258 argument, with the same interpretation as the returned value of
1259 `visited-file-modtime'.
1261 ** Autorevert changes
1264 *** If Emacs is compiled with file notification support, notifications
1265 are used instead of checking the time stamp of the files. You can
1266 disable this by setting the user option `auto-revert-use-notify' to
1267 nil. Alternatively, a regular expression of directories to be
1268 excluded from file notifications can be specified by
1269 `auto-revert-notify-exclude-dir-regexp'.
1272 *** The new user option `auto-revert-remote-files' enables reversion
1273 of remote files when set to non-nil.
1277 *** The function `face-spec-set' is now like `setq' for face specs.
1278 Its third arg now accepts values specifying a face spec type (defface,
1279 custom, or override spec), and the relevant spec is set accordingly.
1282 *** New function `add-face-text-property', which can be used to
1283 conveniently prepend/append new face properties.
1285 *** Face specs set via Custom themes now replace the `defface' spec
1286 rather than inheriting from it (as do face specs set via Customize).
1288 *** New face characteristic (supports :underline (:style wave))
1289 specifies whether or not the terminal can display a wavy line.
1292 *** New face spec attribute :distant-foreground
1293 specifies foreground to use if background color is near the foreground
1294 color that would otherwise have been used.
1299 *** `image-animated-p' is now `image-multi-frame-p'.
1300 It returns non-nil for any image that contains multiple frames,
1301 whether or not it specifies a frame delay.
1304 *** New variable `image-default-frame-delay' gives the frame delay for
1305 animated images which do not specify a frame delay.
1308 *** New functions `image-current-frame' and `image-show-frame' for getting
1309 and setting the current frame of a multi-frame image.
1314 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1315 **** object-name -> eieio-object-name
1316 **** object-class -> eieio-object-class
1317 **** object-class-fast -> eieio--object-class
1318 **** object-class-name -> eieio-object-class-name
1319 **** object-name-string -> eieio-object-name-string
1320 **** object-num-slots -> eieio--object-num-slots
1321 **** object-set-name-string -> eieio-object-set-name-string
1322 **** class-of -> eieio-object-class
1323 **** class-name -> eieio-class-name
1324 **** class-parent -> eieio-class-parent
1325 **** class-parents -> eieio-class-parents
1326 **** class-parents-fast -> eieio-class-parents-fast
1327 **** class-children -> eieio-class-children
1328 **** class-num-slots -> eieio--class-num-slots
1329 **** class-precedence-list -> eieio-class-precedence-list
1330 **** class-direct-subclasses -> eieio-class-children
1331 **** class-direct-superclasses -> eieio-class-parents
1333 ** Changes in encoding and decoding of text
1336 *** New coding-system `prefer-utf-8'.
1337 This is like `undecided' but prefers UTF-8 on decoding if the text to
1338 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1339 any non-ASCII characters are automatically encoded as UTF-8.
1342 *** New attributes of coding-systems whose type is `undecided'.
1343 Two new attributes, `:inhibit-null-byte-detection' and
1344 `:inhibit-iso-escape-detection', determine how to detect encoding of
1345 text that includes null bytes and ISO-2022 escape sequences,
1346 respectively. Each of these attributes can be either nil, zero, or
1347 t. If it is t, decoding text ignores null bytes and, respectively,
1348 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1349 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1350 text is encoded in one of the ISO-2022 encodings, such as
1351 iso-2022-7bit. If the value is zero, Emacs consults the variables
1352 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1354 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1355 UTF-8 encoding and decoding, whenever possible.
1357 These attributes are only meaningful for coding-systems of type
1358 `undecided'. (The type of a coding-system is determined by its
1359 `:coding-type' attribute and can be accessed by calling the
1360 `coding-system-type' function.)
1363 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1366 ** New functions `group-gid' and `group-real-gid'.
1369 ** The spelling of the rx.el category `chinese-two-byte' has been
1370 corrected (the first 'e' was missing).
1373 ** Minor internal changes to the details of lock files.
1374 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1375 If DIR/.#FILE already exists and is not an Emacs lock file,
1376 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1377 numbered lock files DIR/.#FILE.0...).
1378 On file systems that do not support symbolic links, the lock is now a
1379 regular file with contents being what would have been in the symlink.
1381 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1384 *** The package descriptor and name of global variables, constants,
1385 and functions should be separated by two hyphens if the symbol is not
1386 meant to be used by other packages.
1389 * Changes in Emacs 24.4 on Non-Free Operating Systems
1392 ** The procedure for building Emacs on MS-Windows has changed.
1393 It is now built by running the same configure script as on all other
1394 platforms. This requires the MSYS environment and MinGW development
1395 tools. See the updated instructions in nt/INSTALL for details.
1397 Using the Posix configure script and Makefile's also means a change in
1398 the directory structure of the Emacs installation on Windows. It is
1399 now the same as on GNU and Unix systems. In particular, the auxiliary
1400 programs, such as cmdproxy.exe and hexl.exe, are in
1401 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1402 version), version-independent site-lisp is in share/emacs/site-lisp,
1403 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1404 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1405 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1406 directories and will find the files in there automatically; there's no
1407 need to set any variables due to this change.)
1410 ** Emacs on Windows 2000 and later can now access files and directories
1411 whose names cannot be encoded in the current system codepage.
1413 The new variable `w32-unicode-filenames' controls this feature: if it
1414 is t, Emacs uses Unicode APIs to pass file names to system calls,
1415 which lifts the limitation of file names to the current locale.
1418 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1419 The backtrace is written to the 'emacs_backtrace.txt' file in the
1420 directory where Emacs was running.
1423 ** The variable `buffer-file-type' is no longer supported.
1424 Setting it has no effect, and %t in the mode-line format is ignored.
1425 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1426 modifying it has no effect.
1429 ** Lock files now work on MS-Windows.
1430 This helps to prevent losing your edits if the same file is being
1431 edited in another Emacs session or by another user. See the node
1432 "Interlocking" in the Emacs User Manual for the details. To disable
1433 file locking, customize `create-lockfiles' to nil.
1435 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1436 GNUstep and Mac OS X 10.4 use the old font backend.
1437 To use the old backend by default, do on the command line:
1438 % defaults write org.gnu.Emacs FontBackend ns
1440 ** Improved fullscreen support on Mac OS X.
1441 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1442 Customize `ns-use-native-fullscreen' to change the style.
1443 For Mac OS X 10.7 and newer, native is the default.
1445 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1446 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1447 does not apply to images.
1450 * Installation Changes in Emacs 24.3
1452 ** The default X toolkit is now Gtk+ version 3.
1453 If you don't pass `--with-x-toolkit' to configure, or if you use
1454 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1455 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1456 You can explicitly require a specific version by passing
1457 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1459 ** New configure option `--enable-link-time-optimization', to utilize
1460 an appropriate feature provided by GCC since version 4.5.0.
1462 ** New configure option `--without-all' to disable most of the optional
1463 features (image support, etc.) that are normally enabled by default.
1465 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1466 Emacs). If building with GCC, this enables compile-time checks that
1467 warn/give errors about possibly-questionable C code. On a recent GNU
1468 system there should be no warnings; on older and on non-GNU systems
1469 the results may be useful to developers.
1471 ** The configure option `--enable-use-lisp-union-type' has been
1472 renamed to `--enable-check-lisp-object-type', as the resulting
1473 Lisp_Object type no longer uses a union to implement the compile time
1474 check that this option enables.
1476 ** The configure option `--disable-maintainer-mode' has been removed,
1477 as it was confusingly-named and rarely useful.
1479 ** The configure options `--program-prefix', `--program-suffix', and
1480 `--program-transform-name' apply to more than just the installed
1481 binaries. Now they also affect the man pages, icons, and the
1482 etc/emacs.desktop file; but not the info pages, since this would break
1483 links between the various manuals.
1485 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1486 overwriting "emacs" in the installation bin/ directory with a link
1489 ** Emacs uses libtinfo in preference to libncurses, if available.
1491 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1492 /usr/pkg/lib to the linker search path. You must add them yourself if
1495 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1496 (from the bin and libexec directories, respectively). The former is
1497 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1500 * Startup Changes in Emacs 24.3
1502 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1503 lisp/ directory. There should not be any there anyway. If you have
1504 been adding them there, put them somewhere else; e.g., site-lisp.
1506 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1509 * Changes in Emacs 24.3
1513 *** `C-h f' (`describe-function') can now perform autoloading.
1514 When this command is called for an autoloaded function whose docstring
1515 contains a key substitution construct, that function's library is
1516 automatically loaded, so that the documentation can be shown
1517 correctly. To disable this, set `help-enable-auto-load' to nil.
1519 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1520 even after their associated libraries have been loaded (and the
1521 autoloads have been redefined as functions).
1525 *** Images displayed via ImageMagick now support transparency and the
1526 :background image specification property.
1528 *** When available, ImageMagick support is automatically enabled.
1529 It is no longer necessary to call `imagemagick-register-types'
1530 explicitly to install ImageMagick image types; that function is called
1531 automatically at startup, or when customizing an imagemagick- option.
1533 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1534 ImageMagick to view images. (You must call `imagemagick-register-types'
1535 afterwards if you do not use customize to change this.)
1537 *** The new variable `imagemagick-enabled-types' also affects which
1538 ImageMagick types are treated as images. The function
1539 `imagemagick-filter-types' returns the list of types that will be
1544 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1545 next and previous path separator, respectively.
1547 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1548 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1549 non-nil before enabling the mode.
1553 *** New option `mode-line-default-help-echo' specifies the help text
1554 (shown in a tooltip or in the echo area) for any part of the mode line
1555 that does not have its own specialized help text.
1557 *** You can now click mouse-3 in the coding system indicator to invoke
1558 `set-buffer-file-coding-system'.
1560 ** Server and client
1562 *** emacsclient now obeys string values for `initial-buffer-choice',
1563 if it is told to open a new frame without specifying any file to visit
1564 or expression to evaluate.
1566 *** New option `server-auth-key' specifies a shared server key.
1568 ** Emacs now generates backtraces on fatal errors.
1569 On encountering a fatal error, Emacs now outputs a textual description
1570 of the fatal signal, and a short backtrace on platforms like glibc
1571 that support backtraces.
1573 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1574 This minor mode replaces `toggle-read-only', which is now obsolete.
1576 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1577 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1578 respectively, without exiting from the prompt.
1580 ** In the Package Menu, newly-available packages are listed as "new",
1581 and sorted above the other "available" packages by default.
1583 ** If your Emacs was built from a repository checkout, the new variable
1584 `emacs-bzr-version' contains information about the bzr revision used.
1586 ** New option `create-lockfiles' specifies usage of lockfiles.
1587 It defaults to t. Changing it to nil inhibits the creation of lock
1588 files (use this with caution).
1590 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1591 variables on remote hosts.
1593 ** The entry for PCL-CVS has been removed from the Tools menu.
1594 The PCL-CVS commands are still available via the keyboard.
1596 ** Using "unibyte: t" in Lisp source files is obsolete.
1597 Use "coding: raw-text" instead.
1599 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1600 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1601 The previous binding, introduced in Emacs 24.1, was a mistake, because
1602 `C-c LETTER' bindings are reserved for user customizations.
1604 ** Internationalization
1606 *** New language environment: Persian.
1608 *** New input method `vietnamese-vni'.
1610 ** Nextstep (GNUstep / Mac OS X) port
1612 *** Support for fullscreen and the frame parameter fullscreen.
1614 *** A file dialog is used for open/save operations initiated from the
1618 * Editing Changes in Emacs 24.3
1620 ** Search and Replace
1622 *** Non-regexp Isearch now performs "lax" space matching.
1623 Each sequence of spaces in the supplied search string may match any
1624 sequence of one or more whitespace characters, as specified by the
1625 variable `search-whitespace-regexp'. (This variable is also used by a
1626 similar existing feature for regexp Isearch.)
1628 *** New Isearch command `M-s SPC' toggles lax space matching.
1629 This applies to both ordinary and regexp Isearch.
1631 *** New option `replace-lax-whitespace'.
1632 If non-nil, `query-replace' uses flexible whitespace matching too.
1635 *** Global `M-s _' starts a symbol (identifier) incremental search,
1636 and `M-s _' in Isearch toggles symbol search mode.
1637 `M-s c' in Isearch toggles search case-sensitivity.
1639 ** Navigation commands
1641 *** New binding `M-g c' for `goto-char'.
1643 *** New binding `M-g TAB' for `move-to-column'.
1645 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1646 interactively with no prefix arg. Previously, it moved to column 1.
1648 ** New option `yank-handled-properties' allows processing of text
1649 properties on yanked text, in ways that are more general than just
1650 removing them (as is done by `yank-excluded-properties').
1652 ** New option `delete-trailing-lines' specifies whether
1653 M-x delete-trailing-whitespace should delete trailing lines at the end
1654 of the buffer. It defaults to t.
1656 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1658 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1659 `ucs-insert' is now an obsolete alias for `insert-char'.
1661 ** The `z' key no longer has a binding in most special modes.
1662 It used to be bound to `kill-this-buffer', but `z' is too easy to
1665 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1666 It copies the region-rectangle as the last rectangle kill.
1670 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1672 *** New option `register-separator' specifies the register containing
1673 the text to put between collected texts for use with
1674 M-x append-to-register and M-x prepend-to-register.
1677 * Changes in Specialized Modes and Packages in Emacs 24.3
1679 ** Common Lisp emulation (CL)
1681 *** CL's main entry is now (require 'cl-lib).
1682 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1683 i.e., all its definitions have the "cl-" prefix (and internal definitions
1684 use the "cl--" prefix).
1686 If `cl' provided a feature under the name `foo', then `cl-lib'
1687 provides it under the name `cl-foo' instead; with the exceptions of the
1688 few `cl' definitions that had to use `foo*' to avoid conflicts with
1689 pre-existing Elisp entities. These have been renamed to `cl-foo'
1690 rather than `cl-foo*'.
1692 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1693 provide the old, non-prefixed names. Some exceptions are listed below:
1695 *** `cl-flet' is not like `flet' (which is deprecated).
1696 Instead it obeys the behavior of Common-Lisp's `flet'.
1697 In particular, in cl-flet function definitions are lexically scoped,
1698 whereas in flet the scoping is dynamic.
1700 *** `cl-labels' is slightly different from `labels'.
1701 The difference is that it relies on the `lexical-binding' machinery
1702 (as opposed to the `lexical-let' machinery used previously) to capture
1703 definitions in closures, so such closures will only work if `lexical-binding'
1706 *** `cl-letf' is not exactly like `letf'.
1707 The only difference is in details that relate to some deprecated usage
1708 of `symbol-function' in place forms.
1710 *** `progv' was rewritten to use the `let' machinery.
1711 A side effect is that variables without corresponding values are bound
1712 to nil rather than being made unbound.
1714 *** The following methods of extending `setf' are obsolete
1715 (use features from gv.el instead):
1716 `define-modify-macro' (use `gv-letplace')
1717 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1718 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1719 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1723 *** Changes are now highlighted using the same color scheme as in
1724 modern VCSes. Deletions are displayed in red (new faces
1725 `diff-refine-removed' and `smerge-refined-removed', and new definition
1726 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1727 and `smerge-refined-added', and new definition of `diff-added').
1729 *** The variable `diff-use-changed-face' defines whether to use the
1730 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1731 changes in context diffs.
1733 *** The new command `diff-delete-trailing-whitespace' removes trailing
1734 whitespace introduced by a diff.
1736 ** Ediff now uses the same color scheme as Diff mode.
1740 A new version of python.el, which provides several new features, including:
1741 per-buffer shells, better indentation, Python 3 support, and improved
1742 shell-interaction compatible with iPython (and virtually any other
1745 *** Some user options have been replaced/renamed, including (old -> new):
1746 **** python-indent -> python-indent-offset
1747 **** python-guess-indent -> python-indent-guess-indent-offset
1748 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1749 **** python-use-skeletons -> python-skeleton-autoinsert
1751 *** Some user options have been removed, including:
1753 **** `python-indent-string-contents': Strings are never indented.
1755 **** `python-honour-comment-indentation':
1756 Comments are always considered as indentation markers.
1758 **** `python-continuation-offset': Indentation is automatically
1759 calculated in a pep8 compliant way depending on the context.
1761 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1762 Have no direct mapping as the shell interaction is completely different.
1764 **** `python-python-command', `python-jython-command':
1765 Replaced by `python-shell-interpreter'.
1767 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1768 `python-pdbtrack-minor-mode-string', `python-source-modes':
1771 *** Some commands have been replaced (old -> new):
1772 **** python-insert-class -> python-skeleton-class
1773 **** python-insert-def -> python-skeleton-def
1774 **** python-insert-for -> python-skeleton-for
1775 **** python-insert-if -> python-skeleton-if
1776 **** python-insert-try/except -> python-skeleton-try
1777 **** python-insert-try/finally -> python-skeleton-try
1778 **** python-insert-while -> python-skeleton-while
1779 **** python-find-function -> python-nav-jump-to-defun
1780 **** python-next-statement -> python-nav-forward-sentence
1781 **** python-previous-statement -> python-nav-backward-sentence
1782 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1783 **** python-end-of-defun-function -> python-nav-end-of-defun
1784 **** python-send-buffer -> python-shell-send-buffer
1785 **** python-send-defun -> python-shell-send-defun
1786 **** python-send-region -> python-shell-send-region
1787 **** python-send-region-and-go -> emulate with python-shell-send-region
1788 and python-shell-switch-to-shell
1789 **** python-send-string -> python-shell-send-string
1790 **** python-switch-to-python -> python-shell-switch-to-shell
1791 **** python-describe-symbol -> python-eldoc-at-point
1795 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1797 *** The D-Bus object manager interface is implemented.
1799 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1800 if their value does not fit into Emacs's integer range.
1802 *** The function `dbus-call-method' is now non-blocking.
1803 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1805 *** Signals can also be sent as unicast messages.
1807 *** The argument list of `dbus-register-signal' has been extended,
1808 according to the new match rule types of D-Bus.
1810 *** `dbus-init-bus' supports private connections.
1812 *** There is a new function `dbus-setenv'.
1814 ** `desktop-path' no longer includes the "." directory.
1815 Desktop files are now located in ~/.emacs.d by default.
1819 *** `dired-do-async-shell-command' executes each file sequentially
1820 if the command ends in `;' (when operating on multiple files).
1821 Otherwise, it executes the command on each file in parallel.
1823 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1824 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1827 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1828 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1829 mark/unmark/flag all files in the active region.
1831 *** The minibuffer default for `=' (`dired-diff') has changed.
1832 It is now the backup file for the file at point, if one exists.
1833 In Transient Mark mode the default is the file at the active mark.
1835 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1836 The global binding for `M-=', `count-words-region' is in effect.
1840 *** New module "notifications", which can send a notification when you
1841 receive a private message or your nickname is mentioned.
1843 *** ERC will look up server/channel names via auth-source and use any
1846 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1847 only applies to messages sent by lurkers.
1849 ** reStructuredText mode
1851 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1852 fontification, comment handling, and customization have all been revised
1855 *** Support for `imenu' and `which-function-mode'.
1857 *** The reStructuredText syntax is more closely covered.
1858 Sphinx support has been improved.
1860 *** `rst-insert-list' inserts new list or continues existing lists.
1862 *** A negative prefix argument always works for `rst-adjust'.
1864 *** The window configuration is reset after displaying a TOC.
1866 *** The constant `rst-version' describes the rst.el package version.
1870 *** Support for percent literals and recognition of regular expressions
1871 in method calls without parentheses with more methods, including Cucumber
1874 *** Improved syntax highlighting and indentation.
1876 *** New command `ruby-toggle-block', bound to `C-c {'.
1878 *** Some non-standard keybindings/commands have been removed:
1880 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1882 **** `ruby-mark-defun'; use `mark-defun'.
1884 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1885 appropriate settings for the variables `beginning-of-defun-function'
1886 and `end-of-defun-function'.
1888 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1889 `reindent-then-newline-and-indent' and `newline' have been removed.
1891 ** Shell Script mode
1893 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1895 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1897 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1901 *** The free software compiler GHDL is supported (and now the default).
1903 *** Support for the VHDL-AMS packages has been added/updated.
1905 *** Updated to the 2002 revision of the VHDL standard.
1907 *** Accepts \r and \f as whitespace.
1911 *** The faces used by Apropos are now directly customizable.
1912 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1913 see the `apropos' Custom group for details.
1915 *** The old options whose values specified faces to use have been removed
1916 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1917 `apropos-match-face' and `apropos-property-face'.).
1921 *** This package has been rewritten to use Tabulated List mode.
1923 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1924 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1928 *** Algebraic simplification mode is now the default.
1929 To restrict to the limited simplifications given by the former
1930 default simplification mode, use `m I'.
1934 *** You can customize the header text that appears above each calendar month.
1935 See the variable `calendar-month-header'.
1937 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1939 *** The calendars produced by cal-html include holidays.
1940 Customize `cal-html-holidays' to change this.
1944 *** The major modes from the parser generators "Bovine" and "Wisent"
1945 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1946 are in `auto-mode-alist', and the corresponding manuals are included.
1950 **** Menu support for the "Configuration" feature. This allows users to
1951 choose the active configuration (such as debug or install) from the menu.
1953 **** New command `ede-set' to interactively set project-local variables.
1955 **** Support for compiling, debugging, and running in "generic" projects.
1957 **** Autoconf editing support for M4 macros with complex arguments.
1959 **** Compilation support for the "linux" project type.
1961 **** "simple" projects have been removed; use "generic" projects instead.
1965 **** Support for parsing #include statements inside a namespace in C/C++.
1967 **** Improved support for 'extern "C"' declarations in C/C++.
1969 **** The ability to ignore more common special C/C++ preprocessor symbols,
1970 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1971 If available, include cdefs.h as an additional source of preprocessor symbols.
1973 **** Improved C/C++ function pointer parsing.
1975 **** In Python, support for converting imports to include file names.
1977 **** Ability to dynamically determine the Python load path.
1979 **** Support for the Python 'WITH' and 'AT' keywords.
1981 **** Improved tooltip completion.
1985 **** The SRecode manual is now included.
1987 **** Tag generation supports constructor/destructor settings and system
1988 include differentiation.
1990 **** Addition of 'Framework' support: Frameworks are specified when a
1991 particular kind of library (such as Android) is needed in a common language
1994 **** Support for nested templates and let variables override based on priority.
1996 **** Support for merging tables from multiple related modes, such as
1997 default -> c++ -> arduino.
1999 ** Compile has a new option `compilation-always-kill'.
2003 *** `custom-reset-button-menu' now defaults to t.
2005 *** Non-option variables are never matched in `customize-apropos' and
2006 `customize-apropos-options' (i.e., the prefix argument does nothing for
2007 these commands now).
2011 *** The variables `term-default-fg-color' and `term-default-bg-color'
2012 are now deprecated in favor of the customizable face `term'.
2014 *** You can customize how to display ANSI terminal colors and styles
2015 by customizing the corresponding `term-color-<COLOR>',
2016 `term-color-underline' and `term-color-bold' faces.
2020 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2022 *** Remote processes are now also supported on remote MS-Windows hosts.
2026 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2027 Previously, this slot stored semicolon-separated attribute-value pairs
2028 appended to some imap URLs, but this is not compatible with RFC 3986.
2029 So now the `filename' slot stores the entire path and query components,
2030 and the `attributes' slot is always nil.
2032 *** New function `url-encode-url' for encoding a URI string.
2033 The `url-retrieve' function now uses this to encode its URL argument,
2034 in case that is not properly encoded.
2036 ** notifications.el supports now version 1.2 of the Notifications API.
2037 The function `notifications-get-capabilities' returns the supported
2040 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2041 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2042 `flymake-warning-bitmap'.
2044 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2045 specifying URL types that should be converted to remote file names at
2046 the FFAP prompt. The default is now '("ftp").
2048 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2049 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2051 ** New option `mouse-avoidance-banish-position' specifies where the
2052 `banish' mouse avoidance setting moves the mouse.
2054 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2055 closing brackets to be aligned with the line of the opening bracket.
2057 ** In Proced mode, new command `proced-renice' renices marked processes.
2059 ** New option `async-shell-command-buffer' specifies the buffer to use
2060 for a new asynchronous `shell-command' when the default output buffer
2061 `*Async Shell Command*' is already in use.
2063 ** SQL mode has a new option `sql-db2-escape-newlines'.
2064 If non-nil, newlines sent to the command interpreter will be escaped
2065 by a backslash. The default does not escape the newlines and assumes
2066 that the sql statement will be terminated by a semicolon.
2068 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2069 (and modes that derive from it), sorts the column at point, or the Nth
2070 column if a numeric prefix argument is given.
2072 ** `which-func-modes' now defaults to t, so Which Function mode, when
2073 enabled, applies to all applicable major modes.
2075 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2078 ** Follow mode no longer works by using advice.
2079 The option `follow-intercept-processes' has been removed.
2081 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2083 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2084 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2085 *** semantic-change-hooks -> semantic-change-functions
2086 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2087 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2088 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2089 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2090 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2091 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2092 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2093 *** rcirc-activity-hooks -> rcirc-activity-functions
2094 *** rcirc-print-hooks -> rcirc-print-functions
2095 *** dbus-event-error-hooks -> dbus-event-error-functions
2096 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2097 *** checkdoc-style-hooks -> checkdoc-style-functions
2098 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2099 *** archive-extract-hooks -> archive-extract-hook
2100 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2101 *** hfy-post-html-hooks -> hfy-post-html-hook
2102 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2103 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2104 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2105 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2107 ** Obsolete packages
2110 In most cases, assoc+member+push+delq work just as well.
2111 And in any case it's just a terrible package: ugly semantics, terrible
2112 inefficiency, and not namespace-clean.
2121 * Incompatible Lisp Changes in Emacs 24.3
2123 ** Docstrings starting with `*' no longer indicate user options.
2124 Only variables defined using `defcustom' are considered user options.
2125 The function `user-variable-p' is now an obsolete alias for
2126 `custom-variable-p'.
2128 ** The return values of `defalias', `defun' and `defmacro' have changed,
2129 and are now undefined. For backwards compatibility, `defun' and
2130 `defmacro' currently return the name of the newly defined
2131 function/macro, but this should not be relied upon.
2133 ** `random' by default now returns a different random sequence in
2134 every Emacs run. Use `(random S)', where S is a string, to set the
2135 random seed to a value based on S, in order to get a repeatable
2136 sequence in later calls.
2138 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2139 that substring is inserted literally even if the LITERAL arg is
2140 non-nil, instead of causing an error to be signaled.
2142 ** `select-window' now always makes the window's buffer current.
2143 It does so even if the window was selected before.
2145 ** The function `x-select-font' can return a font spec, instead of a
2146 font name as a string. Whether it returns a font spec or a font name
2147 depends on the graphical library.
2149 ** `face-spec-set' no longer sets frame-specific attributes when the
2150 third argument is a frame (that usage was obsolete since Emacs 22.2).
2152 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2154 ** The CL package's `get-setf-method' function no longer exists.
2155 Generalized variables are now part of core Emacs Lisp, and implemented
2156 differently to the way cl.el used to do it. It is not possible to
2157 define a compatible replacement for `get-setf-method'. See the file
2158 gv.el for internal details of the new implementation.
2160 ** The arguments of `dbus-register-signal' are no longer just strings,
2161 but keywords or keyword-string pairs. The old argument list will
2162 still be supported for Emacs 24.x.
2164 ** Miscellaneous name changes
2165 Some Lisp symbols have been renamed to correct their spelling,
2166 or to be more consistent with standard Emacs terminology.
2168 *** Renamed functions
2169 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2170 **** inactivate-input-method -> deactivate-input-method
2171 **** quail-inactivate -> quail-deactivate
2172 **** robin-inactivate -> robin-deactivate
2173 **** viper-inactivate-input-method -> viper-deactivate-input-method
2174 **** viper-inactivate-input-method-action ->
2175 viper-deactivate-input-method-action
2176 **** ucs-input-inactivate -> ucs-input-deactivate
2179 The old hooks are still supported for backward compatibility, but they
2180 are deprecated and will be removed eventually.
2181 **** input-method-inactivate-hook -> input-method-deactivate-hook
2182 **** robin-inactivate-hook -> robin-deactivate-hook
2183 **** quail-inactivate-hook -> quail-deactivate-hook
2185 *** Renamed variables
2186 **** follow-deactive-menu -> follow-inactive-menu
2187 **** inactivate-current-input-method-function ->
2188 deactivate-current-input-method-function
2190 ** Some obsolete functions, variables, and faces have been removed:
2191 *** `last-input-char', `last-command-char', `unread-command-char'
2192 *** `facemenu-unlisted-faces'
2193 *** `rmail-decode-mime-charset'
2194 *** `iswitchb-read-buffer'
2195 *** `sc-version', `sc-submit-bug-report'
2196 *** `set-char-table-default'
2197 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2198 *** `compile-internal'
2200 *** `mode-line-inverse-video'
2201 *** `follow-mode-off-hook'
2202 *** `cvs-commit-buffer-require-final-newline'
2203 (use `log-edit-require-final-newline' instead)
2204 *** `cvs-changelog-full-paragraphs'
2205 (use `log-edit-changelog-full-paragraphs' instead)
2206 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2207 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2208 *** `vc-master-templates' (use `vc-handled-backends' instead)
2209 *** `vc-checkout-carefully'
2212 * Lisp Changes in Emacs 24.3
2214 ** CL-style generalized variables are now in core Elisp.
2215 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2216 You can define your own generalized variables using `gv-define-simple-setter',
2217 `gv-define-setter', etc.
2219 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2220 This can significantly speed up execution of non-byte-compiled code,
2221 but can also bump into previously unnoticed cyclic dependencies.
2222 These are generally harmless: they will simply cause the macro calls
2223 to be left for later expansion (as before), but will result in a
2224 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2225 You may wish to restructure your code so this does not happen.
2227 ** New sampling-based Elisp profiler.
2228 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2229 When finished, use M-x profiler-stop. The sampling rate can be based on
2230 CPU time or memory allocations.
2232 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2233 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2235 ** New macros `setq-local' and `defvar-local'.
2237 ** Face underlining can now use a wave.
2239 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2240 of `read-regexp' accepts a string ending with a colon and space, and its
2241 second argument DEFAULTS can be a list of strings accessible via `M-n'
2242 in the minibuffer ahead of other hard-coded useful regexp-related values.
2243 More commands use `read-regexp' now to read their regexp arguments.
2247 *** New function `completion-table-with-quoting' to handle completion
2248 in the presence of quoting, such as file completion in shell buffers.
2250 *** New function `completion-table-subvert' to use an existing completion
2251 table, but with a different prefix.
2255 *** New error type and new function `user-error'.
2256 These do not trigger the debugger.
2258 *** New option `debugger-bury-or-kill', saying what to do with the
2259 debugger buffer when exiting debug.
2261 *** Set `debug-on-message' to enter the debugger when a certain
2262 message is displayed in the echo area. This can be useful when trying
2263 to work out which code is doing something.
2265 *** New var `inhibit-debugger', automatically set to prevent accidental
2266 recursive invocations.
2270 *** New command `fit-frame-to-buffer' adjusts the frame height to
2273 *** The command `fit-window-to-buffer' can adjust the frame height
2274 if the new option `fit-frame-to-buffer' is non-nil.
2276 *** New macro `with-temp-buffer-window', similar to
2277 `with-output-to-temp-buffer'.
2279 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2282 *** New option `switch-to-buffer-preserve-window-point' to restore a
2283 window's point when switching buffers.
2285 *** New display action alist entries `window-height' and `window-width'
2286 specify the size of new windows created by `display-buffer'.
2288 *** New display action alist entry `pop-up-frame-parameters', if
2289 non-nil, specifies frame parameters to give any newly-created frame.
2291 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2292 tells display action functions to avoid changing which frame is
2295 *** New display action alist entry `previous-window', if non-nil,
2296 specifies window to reuse in `display-buffer-in-previous-window'.
2298 *** New display action functions `display-buffer-below-selected',
2299 and `display-buffer-in-previous-window'.
2301 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2302 now accept a third argument to avoid choosing the selected window.
2304 *** Additional values recognized for option `window-combination-limit'.
2306 *** The following variables are obsolete, as they can be replaced by
2307 appropriate entries in the `display-buffer-alist' function introduced
2309 **** `dired-shrink-to-fit'
2310 **** `display-buffer-reuse-frames'
2311 **** `display-buffer-function'
2312 **** `special-display-buffer-names'
2313 **** `special-display-frame-alist'
2314 **** `special-display-function'
2315 **** `special-display-regexps'
2319 *** `current-time-string' no longer requires that its argument's year
2320 must be in the range 1000..9999. It now works with any year supported
2321 by the underlying C implementation.
2323 *** `current-time' now returns extended-format time stamps
2324 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2325 PSEC is typically a multiple of 1000 on current machines. Other
2326 functions that use this format, such as `file-attributes' and
2327 `format-time-string', have been changed accordingly. Old-format time
2328 stamps are still accepted.
2330 *** The format of timers in `timer-list' and `timer-idle-list' is now
2331 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2332 The PSECS slot is new, and uses picosecond resolution. It can be
2333 accessed via the new `timer--psecs' accessor.
2335 *** Last-modified time stamps in undo lists now are of the form
2336 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2340 *** Improved security when handling persistent objects:
2342 **** `eieio-persistent-read' now features optional arguments for specifying
2343 the class to load, as well as a flag stating whether subclasses are allowed;
2344 if provided, other classes will be rejected by the reader. For
2345 compatibility with existing code, if the class is omitted only a
2348 **** New specialized reader for pulling in classes and signaling errors
2349 without evaluation of suspicious code.
2351 **** All slots that contain objects must have a :type. Slots with lists
2352 of objects must use a new type predicate for a list of an object type.
2354 *** Support for `find-function' and similar utilities, through the addition
2355 of filename support to generated symbols.
2357 ** Floating point functions now always return special values like NaN,
2358 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2359 Previously, they returned NaNs on some platforms but signaled errors
2360 on others. The affected functions are acos, asin, tan, exp, expt,
2361 log, log10, sqrt, and mod.
2363 ** New fringe bitmap `exclamation-mark'.
2365 ** Miscellaneous changes to special forms and macros
2367 *** `defun' and `defmacro' are now macros rather than special forms.
2369 *** `kbd' is now a function rather than a macro.
2371 ** Miscellaneous new functions
2373 *** `set-temporary-overlay-map' sets up a temporary keymap that
2374 takes precedence over most other maps for a short while (normally one key).
2376 *** `autoloadp' tests if its argument is an autoloaded object.
2378 *** `autoload-do-load' performs the autoloading operation.
2380 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2382 *** `file-name-base' returns a file name sans directory and extension.
2384 *** `function-get' fetches a function property, following aliases.
2386 *** `posnp' tests if an object is a `posn'.
2388 *** `system-users' returns the user names on the system.
2390 *** `system-groups' returns the group names on the system.
2392 *** `tty-top-frame' returns the topmost frame of a text terminal.
2394 ** The following functions and variables are obsolete:
2395 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2396 *** `buffer-has-markers-at'
2397 *** `macro-declaration-function' (use `macro-declarations-alist')
2398 *** `window-system-version' (provides no useful information)
2399 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2400 *** `query-replace-interactive'
2401 *** `font-list-limit' (has had no effect since Emacs < 23)
2404 * Changes in Emacs 24.3 on Non-Free Operating Systems
2406 ** Cygwin builds can use the native MS Windows user interface.
2407 Pass `--with-w32' to configure. The default remains the X11 interface.
2409 ** Two new functions are available in Cygwin builds:
2410 `cygwin-convert-file-name-from-windows' and
2411 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2412 code to access the Cygwin file-name mapping machinery to convert
2413 between Cygwin and Windows-native file and directory names.
2415 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2416 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2417 `mouse-autoselect-window'.
2419 ** On MS Windows Vista and later Emacs now supports symbolic links.
2421 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2422 support for libxml2, even if its presence is detected.
2424 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2426 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2427 directories to the search path. You must add them yourself if you want them.
2430 * Changes in Emacs 24.2
2432 ** This is mainly a bug-fix release.
2435 * Installation Changes in Emacs 24.1
2437 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2438 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2439 also depend on Gtk+. You can disable them with --without-rsvg and
2442 ** Emacs can be compiled with GnuTLS support.
2443 This happens by default if a suitably recent version of the library is
2444 found at build time. To prevent this, use the configure option
2445 `--without-gnutls'. See below for GnuTLS features.
2447 ** Emacs can be compiled with SELinux support.
2448 This happens by default if a suitably recent version of the library is
2449 found at build time. To prevent this, use the configure option
2450 `--without-selinux'. See below for SELinux features.
2452 ** Emacs can be compiled with ImageMagick support.
2453 This happens by default if a suitably recent version of the library is
2454 found at build time. To prevent this, use the configure option
2455 `--without-imagemagick'. See below for ImageMagick features.
2456 This feature is not available for the Nextstep or MS ports.
2458 ** Emacs can be compiled with libxml2 support.
2459 This happens by default if a suitably recent version of the library is
2460 found at build time. To prevent this, use the configure option
2461 `--without-xml2'. See below for libxml2 features.
2463 ** By default, the installed Info and man pages are compressed.
2464 You can disable this by configuring --without-compress-info.
2466 ** New configure option --with-wide-int.
2467 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2468 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2471 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2472 These provide no new functionality, they just remove the need to edit
2473 lib-src/Makefile by hand in order to use the associated features.
2475 ** New configure option --enable-use-lisp-union-type.
2476 This is only useful for Emacs developers to debug certain types of bugs.
2477 This is not a new feature; only the configure flag is new.
2479 ** The standalone programs digest-doc and sorted-doc are removed.
2480 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2482 ** The standalone program `fakemail' is removed.
2483 If you need it, feedmail.el provides a superset of the functionality.
2486 * Startup Changes in Emacs 24.1
2488 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2489 command line arguments, and the EMACS_UNIBYTE environment variable, no
2490 longer have any effect. (They were declared obsolete in Emacs 23.)
2492 ** New command line option `--no-site-lisp' removes site-lisp directories
2493 from load-path. -Q now implies this. This option does not affect the
2494 EMACSLOADPATH environment variable (and hence has no effect for
2498 * Changes in Emacs 24.1
2502 *** Many packages now use the `completion-at-point' command,
2503 rather than implementing separate completion commands.
2505 *** `completion-at-point' now handles tags and semantic completion.
2507 *** Completion in a non-minibuffer now tries to detect the end of completion
2508 and pops down the *Completions* buffer accordingly.
2510 *** New option `completion-cycle-threshold' allows completion cycling.
2512 *** New option `completion-category-overrides' for overriding the
2513 default completion style in certain circumstances.
2515 *** New completion style `substring'.
2517 *** Completion of buffer names uses `substring' completion by default.
2519 *** The option `widget-complete-field' has been removed.
2523 *** The first time you try sending mail, Emacs asks for a mail method.
2524 This is implemented by a new default for `send-mail-function', which
2525 is `sendmail-query-once'. This offers to use the smtpmail package, or
2526 to use the old defaults relying on external mail facilities
2527 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2528 `mailclient-send-it' on Windows).
2530 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2531 transfers the report to your desktop's preferred mail client, if there
2532 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2535 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2536 and Mail mode changes
2538 ** Emacs server and client changes
2540 *** New option `server-port' specifies the port for TCP Emacs servers.
2542 *** New emacsclient argument -q/--quiet suppresses some status messages.
2544 *** New emacsclient argument --frame-parameters specifies the frame
2545 parameters of any newly-created graphical frame.
2547 *** If emacsclient shuts down due to Emacs signaling an error,
2548 its exit status is 1.
2550 *** New emacsclient argument --parent-id ID.
2551 This opens a client frame in parent X window ID, via XEmbed, similar
2552 to the --parent-id argument to Emacs.
2554 ** Internationalization changes
2556 *** Emacs now supports display and editing of bidirectional text.
2557 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2558 displayed in the correct visual order as expected by users of those
2559 scripts. The display reordering is a "full bidirectionality" class
2560 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2561 with no RTL text should look exactly the same as before.
2563 **** New buffer-local variable `bidi-display-reordering'.
2564 To disable display reordering in a buffer, change this to nil.
2566 **** New buffer-local variable `bidi-paragraph-direction'.
2567 If nil (the default), Emacs determines the base direction of each
2568 paragraph from its text, as specified by the UBA. Setting the value
2569 to `right-to-left' or `left-to-right' forces a base direction on each
2572 Paragraphs with right-to-left base direction are displayed starting at
2573 the right window edge.
2575 *** Enhanced support for characters with no glyphs in available fonts,
2576 or, on text terminals, characters that cannot be encoded by the
2577 terminal coding system. The new option `glyphless-char-display-control'
2578 specifies how to display them: as a hexadecimal code in a box, a thin
2579 1-pixel space, an empty box, etc.
2581 *** New input methods for Farsi and Bulgarian
2582 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2584 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2585 (U+2010 and U+2011).
2587 *** New Hebrew translation of the Emacs Tutorial.
2588 Type `C-u C-h t' to choose it in case your language setup doesn't
2589 automatically select it.
2591 ** An Emacs Lisp package manager is now included.
2592 This is a convenient way to download and install additional packages,
2593 from a package repository at http://elpa.gnu.org.
2595 *** M-x list-packages shows a list of packages, which can be
2596 selected for installation.
2598 *** New command `describe-package', bound to `C-h P'.
2600 *** By default, all installed packages are loaded automatically when
2601 Emacs starts up. To disable this, set `package-enable-at-startup' to
2602 nil. To specify the packages to load, customize `package-load-list'.
2604 ** Custom theme changes
2606 *** New command `M-x customize-themes', which provides a convenient
2607 interface for enabling and disabling Custom themes.
2609 *** New option `custom-theme-load-path' is the load path for themes.
2610 Emacs no longer looks for Custom themes in `load-path'. The default
2611 value of `custom-theme-load-path' says to look for themes in
2612 `custom-theme-directory', followed by a subdirectory of
2613 `data-directory' named "themes/", which contains a small selection of
2614 built-in Custom themes.
2616 *** New option `custom-safe-themes' records known-safe theme files.
2617 If a theme is not in this list, Emacs queries before loading it, and
2618 offers to save the theme to `custom-safe-themes' automatically. By
2619 default, all themes included in Emacs are treated as safe.
2621 ** Improved GTK integration
2623 *** GTK scroll-bars are now placed on the right by default.
2624 The function `set-scroll-bar-mode' can change this.
2626 *** GTK tool bars can have just text, just images or images and text.
2627 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2628 the default is taken from desktop settings.
2630 *** GTK tool bars can be placed on any edge of the frame.
2631 The frame-parameter tool-bar-position controls this. It takes the
2632 values top, left, right or bottom. The Options => Show/Hide menu has
2635 *** The default colors for selected text (the `region' face) are taken
2636 from the GTK theme when Emacs is built with GTK.
2638 *** Emacs uses GTK tooltips by default if built with GTK.
2639 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2641 ** Graphical interface changes
2643 *** On graphical displays, the mode-line no longer ends in dashes.
2644 Also, the first dash (which does not indicate anything) is just
2645 displayed as a space.
2647 *** `menu-bar-select-buffer-function' lets you choose another operation
2648 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2650 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2651 built with Xft. These fonts can be set via X resources, for example:
2652 Emacs.pane.menubar.font: Courier-12
2656 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2657 or if it receives a SIGINT signal in batch mode.
2659 *** `kill-emacs-hook' is now also run in batch mode.
2660 Third-party code which adds to `kill-emacs-hook' should check if they
2661 do the right thing in batch mode.
2663 ** Scrolling changes
2665 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2666 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2667 of buffer at first key-press (instead they move to top/bottom of buffer)
2668 when `scroll-error-top-bottom' is non-nil.
2670 *** New option `scroll-error-top-bottom' (see above).
2672 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2673 scroll a line instead of full screen.
2675 *** New property `scroll-command' should be set on a command's symbol to
2676 define it as a scroll command affected by `scroll-preserve-screen-position'.
2678 *** If you customize `scroll-conservatively' to a value greater than 100,
2679 Emacs will never recenter point in the window when it scrolls due to
2680 cursor motion commands or commands that move point (e.f., `M-g M-g').
2681 Previously, you needed to use `most-positive-fixnum' as the value of
2682 `scroll-conservatively' to achieve the same effect.
2684 *** "Aggressive" scrolling now honors the scroll margins.
2685 If you customize `scroll-up-aggressively' or
2686 `scroll-down-aggressively' and move point off the window, Emacs now
2687 scrolls the window so as to avoid positioning point inside the scroll
2690 ** Basic SELinux support has been added.
2691 This requires Emacs to be linked with libselinux at build time.
2693 *** Emacs preserves the SELinux file context when backing up.
2694 Also, the function `copy-file' has an extra optional argument for
2695 preserving SELinux context, and the return value of `backup-buffer'
2696 now includes the SELinux context.
2698 *** New functions `file-selinux-context' and `set-file-selinux-context'
2699 get and set the SELinux context of a file.
2703 *** `delete-by-moving-to-trash' now only affects commands that specify
2704 trashing. This avoids inadvertently trashing temporary files.
2706 *** Calling `delete-file' or `delete-directory' with a prefix argument
2707 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2709 ** File- and directory-local variable changes
2711 *** You can stop directory local vars from applying to subdirectories.
2712 Add an element (subdirs . nil) to the alist portion of any variables
2713 settings to indicate that the section should not apply to
2716 *** Directory local variables can apply to some file-less buffers.
2717 Affected modes include dired, vc-dir, and log-edit. For example,
2718 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2719 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2720 `hack-dir-local-variables-non-file-buffer' to support this.
2722 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2723 Instead, use "eval: (minor-mode 1)".
2725 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2726 to `inhibit-local-variables-regexps'. As the name suggests, it now
2727 applies to ALL file local variables, not just -*- lines. The
2728 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2733 *** The `quit-window' command now restores the last buffer displayed
2734 in the quitted window.
2736 *** Resizing an Emacs frame now preserves proportional window sizes,
2737 modulo restrictions like window minimum sizes and fixed-size windows.
2739 *** The behavior of `display-buffer' is now customizable in detail.
2741 **** New option `display-buffer-base-action' specifies a list of
2742 user-determined display "actions" (functions and optional arguments
2743 for choosing the displaying window).
2745 This takes precedence over the default display action, which is
2746 specified by `display-buffer-fallback-action'.
2748 **** New option `display-buffer-alist' maps buffer name regexps to
2749 display actions, taking precedence over `display-buffer-base-action'.
2751 *** New option `window-combination-limit'.
2752 The new option `window-combination-limit' allows to return the space
2753 obtained for resizing or creating a window more reliably to the window
2754 from which such space was obtained.
2756 *** New option `window-combination-resize'.
2757 The new option `window-combination-resize' allows to split a window that
2758 otherwise cannot be split because it's too small by stealing space from
2759 other windows in the same combination. Subsequent resizing or deletion
2760 of the window will resize all windows in the same combination as well.
2762 *** New option `frame-auto-hide-function' lets you choose between
2763 iconifying or deleting a frame when burying a buffer in a dedicated
2764 frame, or quitting a window showing a buffer in a frame of its own.
2766 *** New commands `maximize-window' and `minimize-window'.
2767 These maximize and minimize the size of a window within its frame.
2769 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2770 These functions allow to navigate through the live buffers that have
2771 been shown in a specific window.
2773 ** Minibuffer changes
2775 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2776 This is handy for minibuffer-only frames, and is also used for the feature
2777 where mouse-1 pops up *Messages*"', which can now easily be changed.
2779 *** Minibuffers set `truncate-lines' to nil.
2780 If you want to change the value to something else, you could use
2781 for example `minibuffer-setup-hook'.
2783 ** `auto-mode-case-fold' is now enabled by default.
2785 ** `backup-by-copying-when-mismatch' now defaults to t.
2787 ** New basic faces `error', `warning', `success'.
2788 These are used to highlight text indicating failure, caution or
2789 successful operation.
2791 ** New option `list-colors-sort' defines the color sort order
2792 for `list-colors-display'.
2794 ** The variable `focus-follows-mouse' now always defaults to nil.
2797 * Editing Changes in Emacs 24.1
2801 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2802 `isearch-yank-line'.
2804 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2805 `isearch-yank-kill'.
2807 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2809 ** New commands `count-words-region' and `count-words'.
2811 *** M-= is bound to `count-words-region', not `count-lines-region'.
2812 The `count-words-region' command, when called interactively, reports
2813 the number of lines, words, and characters in the region. It is a
2814 superset of the old `count-lines-region', which is now an obsolete
2817 ** The command `just-one-space' (M-SPC), if given a negative argument,
2818 also deletes newlines around point.
2822 *** New option `delete-active-region'.
2823 If non-nil, [delete] and DEL delete the region if it is active and no
2824 prefix argument is given. If set to `kill', those commands kill
2827 *** New command `delete-forward-char', bound to [delete].
2828 This is meant for interactive use, and obeys `delete-active-region'.
2829 The command `delete-char' does not obey `delete-active-region'.
2831 *** `delete-backward-char' is now a Lisp function.
2832 Apart from obeying `delete-active-region', its behavior is unchanged.
2833 However, the byte compiler now warns if it is called from Lisp; Lisp
2834 callers should use delete-char with a negative argument instead.
2836 *** The option `mouse-region-delete-keys' has been deleted.
2838 ** Selection changes.
2840 The default handling of clipboard and primary selections has been
2841 changed to conform with modern X applications. In short, most
2842 commands for killing and yanking text now use the clipboard, while
2843 mouse commands use the primary selection.
2845 In the following, we provide a list of these changes, followed by a
2846 list of steps to get the old behavior back if you prefer that.
2848 *** `select-active-regions' now defaults to t.
2849 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2850 the kill ring. The selected text is put in the primary selection, if
2851 the system possesses a separate primary selection facility (e.g. X).
2853 **** `select-active-regions' also accepts a new value, `only'.
2854 This means to only set the primary selection for temporarily active
2855 regions (usually made by mouse-dragging or shift-selection);
2856 "ordinary" active regions, such as those made with C-SPC followed by
2857 point motion, do not alter the primary selection.
2859 **** `mouse-drag-copy-region' now defaults to nil.
2861 *** mouse-2 is now bound to `mouse-yank-primary'.
2862 This pastes from the primary selection, ignoring the kill-ring.
2863 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2865 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2867 *** `x-select-enable-primary' now defaults to nil.
2868 Thus, commands that kill text or copy it to the kill-ring (such as
2869 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2871 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2872 exactly equivalent to M-w, C-w, and C-y respectively.
2874 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2875 non-nil by default, as Windows does not support the primary selection
2876 between applications.
2878 *** To return to the previous behavior, do the following:
2880 **** Change `select-active-regions' to nil.
2881 **** Change `mouse-drag-copy-region' to t.
2882 **** Change `x-select-enable-primary' to t (on X only).
2883 **** Change `x-select-enable-clipboard' to nil.
2884 **** Bind `mouse-yank-at-click' to mouse-2.
2886 *** Support for X cut buffers has been removed.
2888 *** X clipboard managers are now supported.
2889 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2891 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2892 in the current rectangle. With a prefix argument, this prompts for a
2893 number to count from and for a format string.
2895 ** `redisplay-dont-pause' now defaults to t.
2896 This makes Emacs feel more responsive to editing commands that arrive
2897 at high rate, e.g. if you lean on some key, because stopping redisplay
2898 in the middle (when this variable is nil) forces more expensive
2899 updates later on, and Emacs appears to be unable to keep up.
2901 ** The behavior of <TAB> for active regions in Text mode has changed.
2902 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2903 when the region is active causes Emacs to indent all the lines in the
2904 region, aligning them with the line previous to the first line in the
2905 region (or with the left margin if there is no previous line).
2907 ** When `occur' is called with a prefix argument, matching strings are
2908 collected into the `*Occur*' buffer without line numbers. If there
2909 are parenthesized subexpressions in the specified regexp, `occur'
2910 reads replacement text that may contain \\& and \\N whose convention
2911 follows `replace-match'.
2914 * Changes in Specialized Modes and Packages in Emacs 24.1
2916 ** Archive Mode has basic support for browsing and updating 7z archives.
2920 *** BibTeX mode now supports biblatex.
2921 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2922 `bibtex-entry-field-alist' is now an obsolete alias for
2923 `bibtex-BibTeX-entry-alist'.
2925 *** New command `bibtex-search-entries', bound to C-c C-a.
2927 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2929 *** New variable `bibtex-search-entry-globally'.
2933 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2935 *** The default browser used by the package is now the "xdg-open" program,
2936 on platforms that support it. This calls your desktop's preferred browser.
2940 *** Support for musical notes.
2942 *** Support for logarithmic units.
2944 *** No longer uses the tex prefix for TeX specific unit names when
2945 using TeX or LaTeX mode.
2947 *** New option to highlight selections using faces.
2949 *** `calc-histogram' has the option of using a vector to determine the bins.
2951 *** New "O" option prefix.
2953 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2955 ** Calendar, Diary, and Appt
2957 *** Diary entries can contain non-printing "comments".
2958 See the variable `diary-comment-start'.
2960 *** Appointments can specify their individual warning times.
2961 See the variable `appt-warning-time-regexp'.
2963 *** The function specified by `appt-disp-window-function' may be passed
2964 lists of arguments if multiple appointments are due at similar times.
2965 If you are using a custom function for this, you should update it.
2967 *** New function `diary-hebrew-birthday'.
2969 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2970 may no longer be nil, but must all be strings.
2972 *** The obsolete (since Emacs 22.1) method of enabling the appt
2973 package by adding `appt-make-list' to `diary-hook' has been removed.
2974 Use `appt-activate' instead.
2976 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2977 appt-issue-message (use the function appt-activate)
2978 appt-visible/appt-msg-window (use the variable appt-display-format)
2980 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2981 view-diary-entries, list-diary-entries, show-all-diary-entries
2985 *** New feature to "guess" the style in an existing buffer.
2986 The main entry point is M-x c-guess.
2988 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2990 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2991 Thus C-M-a will, by default, go to the beginning of the immediate function,
2994 *** "Macros with semicolons" can be registered for correct indentation.
2995 Where such a macro ends a line (no semicolon) the next statement is no longer
2996 parsed as a statement continuation.
2998 ** Comint and modes derived from it use the standard completion code.
3002 *** Compilation mode can be used without Font Lock mode.
3003 `compilation-parse-errors-function' is now obsolete.
3005 *** New variable `compilation-filter-start', which is bound while
3006 `compilation-filter-hook' runs. It records the start position of the
3007 text inserted by `compilation-filter'.
3009 *** `compilation-error-screen-columns' and `compilation-first-column'
3010 are obeyed in the editing buffer. So programming language modes can
3011 set them, whereas previously only the value in the *Compilation*
3016 *** Customize buffers now contain a search field.
3017 The search is performed using `customize-apropos'.
3018 To turn off the search field, set `custom-search-field' to nil.
3020 *** Options in customize group buffers start out hidden if not customized.
3021 Use the arrow to the left of the option name to toggle visibility.
3023 *** custom-buffer-sort-alphabetically now defaults to t.
3025 *** The color widget now has a "Choose" button, which allows you to
3026 choose a color via `list-colors-display'.
3030 *** It is now possible to access buses other than the default system
3033 *** The `dbus-register-method' and `dbus-register-property' functions
3034 optionally do not register names.
3036 *** The new function `dbus-register-service' registers a known service
3037 name on a D-Bus without also registering a property or a method.
3041 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3042 if called with a prefix argument, read a file name from the minibuffer
3043 instead of using the current buffer.
3045 *** The "dired local variables" feature of Dired-x is obsolete.
3046 The standard directory local variables feature replaces it.
3050 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3051 controlling attempts to autojoin a channel.
3053 *** New variable `erc-coding-system-precedence': If we use `undecided'
3054 as the server coding system, this variable will then be consulted.
3055 The default is to decode strings that can be decoded as utf-8 as
3056 utf-8, and do the normal `undecided' decoding for the rest.
3060 *** The default value of `eshell-directory-name' has changed
3061 to be an "eshell" directory in `user-emacs-directory'.
3062 The old "~/.eshell/" directory is still used if it exists, though.
3066 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3067 It now supports multithread non-stop debugging and simultaneous
3068 debugging of several threads.
3072 *** RET (`image-toggle-animation') toggles animation, if applicable.
3073 Animation plays once, unless the option `image-animate-loop' is non-nil.
3077 *** New command M-x info-display-manual displays a named Info manual.
3078 If that manual is already visited in some Info buffer, it displays
3079 that buffer. (This is handy if you have many manuals in many *info*
3080 buffers, and don't remember the name of the buffer visiting the manual
3081 you want to consult.) Otherwise, it loads and displays the manual.
3083 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3084 This is for compatibility with the stand-alone Info reader program,
3085 and also because `Info-edit' is a rarely used command that is disabled
3088 ** Mail mode changes (not Message mode)
3090 *** New command M-x mail-add-attachment for adding MIME attachments
3092 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3093 (Its name is misleading, since it has nothing to do with MIME
3094 attachments.) The old name is now an obsolete alias to the new name.
3096 ** MH-E has been updated to MH-E version 8.3.1.
3097 See MH-E-NEWS for details.
3099 ** Modula-2 mode provides auto-indentation.
3101 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3103 ** nXML mode no longer binds C-RET to `nxml-complete'.
3104 Completion is now performed via `completion-at-point', bound to C-M-i
3105 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3106 default), this performs tag completion.
3108 ** Org mode has been updated to version 7.8.09.
3109 See ORG-NEWS for details.
3111 ** Prolog mode has been completely revamped, with lots of additional
3112 functionality such as more intelligent indentation, electricity,
3113 support for more variants, including Mercury, and a lot more.
3117 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3118 in the Rmail incoming message.
3120 *** The variable `rmail-message-filter' no longer has any effect.
3121 This change was made in Emacs 23.1 but was not advertised at the time.
3122 Try using `rmail-show-message-hook' instead.
3126 *** M-x shell prompts for the shell path name if the default directory
3127 is a remote file name and neither the environment variable $ESHELL nor
3128 the variable `explicit-shell-file-name' is set.
3130 *** TAB is now bound to the standard `completion-at-point' command,
3131 which now implements the pcomplete rules for shell command completion.
3135 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3136 if the mail server supports them. This uses either built-in GnuTLS
3137 support, or the starttls.el library. Customize `smtpmail-stream-type'
3140 *** The variable `smtpmail-auth-credentials' has been removed.
3141 By default, the information is now stored in the file ~/.authinfo.
3142 This was the default value of smtpmail-auth-credentials. If you had
3143 customized smtpmail-auth-credentials to a list of user names and
3144 passwords, those settings are not used. During your first connection
3145 to the smtp server, Emacs will prompt for the user name and password,
3146 and offer to save them to ~/.authinfo. Or you can manually copy the
3147 credentials to ~/.authinfo. For example, if you had
3149 (setq smtpmail-auth-credentials
3150 '(("mail.example.org" 25 "jim" "s!cret")))
3152 then the equivalent line in ~/.authinfo would be
3154 machine mail.example.org port 25 login jim password s!cret
3156 See the auth-source manual for more information, e.g. on encrypting
3157 the credentials file.
3159 *** The variable `smtpmail-starttls-credentials' has been removed.
3160 If you had that set, you need to put
3162 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3164 in your ~/.authinfo file instead.
3166 *** SMTPmail defaults to using the address in the From: header as the
3167 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3168 to the address you wish to use instead.
3172 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3173 and `sql-oracle-scan-on'.
3175 *** New options controlling prompting for login parameters.
3176 Each supported product has a custom variable `sql-*-login-params',
3177 which is a list of the parameters to be prompted for before a
3178 connection is established.
3180 *** The command `sql-product-interactive' now takes a prefix argument,
3181 which causes it to prompt for an SQL product.
3183 *** Product-specific SQL interactive commands now take prefix arguments.
3184 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3185 given a prefix argument, prompt for a name for the SQL interactive
3186 buffer. This reduces the need for calling `sql-rename-buffer'.
3188 *** SQL interactive modes suppress command continuation prompts, and
3189 replace tabs with spaces. The first change impacts multiple line SQL
3190 statements entered with C-j between each line, statements yanked into
3191 the buffer and statements sent with `sql-send-*' functions. The
3192 second prevents the MySQL and Postgres interpreters from listing
3193 object name completions when sent text via `sql-send-*' functions.
3195 *** New command `sql-connect' starts a predefined SQLi session,
3196 using the login parameters from `sql-connection-alist'.
3198 *** New "Save Connection" menu item in SQLi buffers.
3199 This gathers the login params specified for the SQLi session, if it
3200 was not started by a connection, and saves them as a new connection.
3202 *** New commands for listing database objects and details:
3203 sql-list-all and sql-list-table.
3205 *** An API for manipulating SQL product definitions has been added.
3209 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3213 *** New inline access method "ksu" (kerberized su).
3215 *** The following access methods are discontinued: "ssh1_old",
3216 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3218 *** The user option `remote-file-name-inhibit-cache' controls whether
3219 remote file attributes are cached for better performance.
3221 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3222 default value to "".
3224 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3225 for remote machines which support SELinux.
3227 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3228 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3229 the degree of parallelism.
3231 ** VC and related modes
3233 *** Support for pulling on distributed version control systems.
3234 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3235 supported (currently with Bzr, Git, and Mercurial), to update the
3236 current branch and working tree. A prefix argument means to prompt
3237 the user for specifics, e.g. a pull location.
3239 *** `vc-update' is now an alias for `vc-pull'.
3241 *** Support for merging on distributed version control systems.
3242 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3243 is supported (currently with Bzr, Git, and Mercurial), to merge
3244 changes from another branch into the current one. It prompts for
3245 specifics, e.g. a merge source.
3247 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3248 shows a diff while querying the user. It defaults to t.
3250 *** Log entries in some Log View buffers can be toggled to display a
3251 longer description by typing RET (log-view-toggle-entry-display).
3252 This is currently supported for Bzr, Git, and Mercurial (to support
3253 another backend, define a `log-view-expanded-log-entry-function').
3254 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3255 use this to display the full log entry for the revision at point.
3257 *** New command `vc-ediff' allows visual comparison of two revisions
3258 of a file similar to `vc-diff', but using ediff backend.
3260 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3261 this was not advertised at the time.
3263 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3264 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3265 this was not advertised at the time.
3271 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3273 *** partial-completion-mode (complete.el) is obsolete.
3274 You can get a comparable behavior with:
3275 (setq completion-styles '(partial-completion initials))
3276 (setq completion-pcm-complete-word-inserts-delimiters t)
3278 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3280 *** pgg is obsolete (use EasyPG instead).
3282 *** sregex.el is obsolete, since rx.el is a strict superset.
3284 *** s-region.el and pc-select.el are obsolete.
3285 They are superseded by shift-select-mode, enabled by default since 23.1.
3287 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3291 *** The Landmark game is now invoked with `landmark', not `lm'.
3292 Its functions and variables have been similarly renamed.
3294 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3295 (This interfered with cua-mode.)
3297 *** f90.el has some support for Fortran 2008 syntax.
3299 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3301 *** New command `nato-region' converts text to NATO phonetic alphabet.
3304 * New Modes and Packages in Emacs 24.1
3306 ** Occur Edit mode applies edits made in *Occur* buffers to the
3307 original buffers. It is bound to "e" in Occur mode.
3309 ** New global minor mode electric-pair-mode.
3310 When enabled, typing an open parenthesis automatically inserts the
3311 matching closing one.
3313 ** New global minor mode electric-indent-mode.
3314 When enabled, typing certain characters triggers reindentation.
3315 Major modes wishing to use this can set electric-indent-chars or
3316 electric-indent-functions.
3318 ** New global minor mode electric-layout-mode.
3319 When enabled, typing certain characters automatically inserts newlines.
3320 Major modes wishing to use this can set electric-layout-rules.
3322 ** tabulated-list.el provides a generic major mode for tabulated data,
3323 from which other modes can be derived.
3325 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3327 ** secrets.el is an implementation of the Secret Service API, an
3328 interface to password managers like GNOME Keyring or KDE Wallet. The
3329 Secret Service API requires D-Bus for communication. The command
3330 `secrets-show-secrets' offers a buffer with a visualization of the
3333 ** notifications.el provides an implementation of the Desktop
3334 Notifications API. It requires D-Bus for communication.
3336 ** soap-client.el supports access to SOAP web services from Emacs.
3337 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3339 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3341 ** New emacs-lock.el package.
3342 The previous version has been moved to obsolete/old-emacs-lock.el.
3343 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3344 against exiting Emacs and killing the buffer can be set separately.
3345 The mechanism for automatically turning off protection for buffers
3346 with dead inferior processes has been generalized.
3349 * Incompatible Lisp Changes in Emacs 24.1
3351 ** Passing a nil argument to a minor mode function call now ENABLES
3352 the minor mode unconditionally. This is so that you can write e.g.
3354 (add-hook 'text-mode-hook 'foo-mode)
3356 to enable foo-mode in Text mode buffers, removing the need for
3357 `turn-on-foo-mode' style functions. This affects all mode commands
3358 defined by `define-minor-mode'. If called interactively, the mode
3359 command still toggles the minor mode.
3361 ** The return value of `backup-buffer' has changed.
3362 It is now a list of three elements, where the second element is a list
3363 describing the original file's SELinux context. If Emacs or the
3364 system lacks SELinux support, the context list is (nil nil nil nil).
3365 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3367 ** `char-direction-table' and the `char-direction' function were deleted.
3368 They were buggy and inferior to the new support of bidirectional
3369 editing introduced in Emacs 24. If you need the bidirectional
3370 properties of a character, use `get-char-code-property' with the last
3371 argument `bidi-class'.
3373 ** `copy-directory' now copies the source directory as a subdirectory
3374 of the target directory, if the latter is an existing directory. The
3375 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3376 the contents directly into a pre-existing target directory.
3378 ** For mouse click input events in the text area, the Y pixel
3379 coordinate in the POSITION list now counts from the top of the text
3380 area, excluding any header line. Previously, it counted from the top
3383 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3384 been further reduced. Now a backquote not followed by a space is
3385 always treated as a "new-style" backquote. Please remove all
3386 "old-style" backquotes from your code. If your code uses backquotes
3387 as documented in the Elisp manual, and compiles without warning, then
3388 you have nothing to do in this regard. Code not following the
3389 appropriate conventions may fail to compile.
3391 The most common cause of trouble seems to be an old-style backquote
3392 followed by a newline. Another cause of trouble is vector notation
3393 for key sequence notation: instead of [(control ,)] and [(control ')],
3394 you should write [(control ?,)] and [(control ?')], which will work in
3397 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3398 was not advertised at the time. The function `custom-initialize-delay'
3399 replaced all known uses.
3401 ** `view-buffer' now treats special mode-class in the same way that
3402 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3403 major mode is special).
3405 ** Menu and tool bar changes
3407 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3408 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3409 With these alist entries omitted, `make-frame' checks the value of the
3410 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3411 a menu-bar or tool-bar, respectively. If the alist entries are added,
3412 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3414 *** The menu bar bindings's caches are not used any more.
3415 Use (where-is-internal <def> nil t) instead.
3417 ** Regions created by mouse dragging are now normal active regions,
3418 similar to those created by shift-selection (see Selection changes
3419 above). In previous Emacs versions, these regions were delineated by
3420 `mouse-drag-overlay'; that variable has been removed.
3422 ** The fourth argument of `filter-buffer-substring' has been removed.
3423 If you want to remove text properties from the final result, simply
3424 pass the result through substring-no-properties.
3426 ** cl.el no longer provides `cl-19'.
3428 ** The following obsolete functions and aliases have been removed
3429 (the appropriate new function is given in parentheses; "not needed"
3430 means you can just remove all calls to the function in question):
3432 *** `comint-kill-output' (`comint-delete-output')
3433 *** `decompose-composite-char' (`char-to-string')
3434 *** `outline-visible' (`outline-invisible-p')
3435 *** `internal-find-face' (`facep')
3436 *** `internal-get-face' (`facep and check-face')
3437 *** `frame-update-faces' (not needed)
3438 *** `frame-update-face-colors' (`frame-set-background-mode')
3439 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3440 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3441 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3442 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3443 *** `x-make-font-unbold' (`make-face-unbold')
3444 *** `x-make-font-unitalic' (`make-face-unitalic')
3445 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3446 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3447 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3448 *** `char-bytes' (== 1)
3449 *** `isearch-return-char' (`isearch-printing-char')
3450 *** `make-local-hook' (not needed)
3451 *** `set-screen-height' (`set-frame-height')
3452 *** `set-screen-width' (`set-frame-width')
3454 ** The following obsolete variables and varaliases have been removed
3455 (the appropriate new variable is given in parentheses):
3457 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3458 *** `vc-header-alist' (`vc-BACKEND-header')
3459 *** `directory-sep-char' (== ?/)
3460 *** `font-lock-defaults-alist' (`font-lock-defaults')
3461 *** `e' (`float-e').
3463 ** The following obsolete files were removed:
3464 sc.el, x-menu.el, rnews.el, rnewspost.el
3466 ** The format of the finder-inf.el file has changed, since the Finder
3467 mechanism is now based on the package system. The variable
3468 `finder-package-info' is replaced by `package--builtins' and
3469 `finder-keywords-hash'.
3471 ** When generating autoloads, `update-directory-autoloads' no longer
3472 assumes every inspected file is in your `load-path'. It instead
3473 generates relative names according to the current `load-path'.
3476 * Lisp Changes in Emacs 24.1
3478 ** Code can now use lexical scoping by default instead of dynamic scoping.
3479 The `lexical-binding' variable enables lexical scoping for local
3480 variables. It is typically set via a file-local variable in the first
3481 line of the file, in which case it applies to all the code in that
3484 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3485 binding instead of the old dynamic binding mode.
3487 *** Lexically scoped interpreted functions are represented with a new form
3488 of function value which looks like (closure ENV ARGS &rest BODY).
3490 *** New macro `letrec' to define recursive local functions.
3492 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3493 So do `defcustom' and other forms that call `defvar' as a subroutine.
3495 *** New function `special-variable-p' to check whether a variable is
3496 declared as dynamically bound.
3498 *** The form ((lambda ...) ...) is deprecated.
3500 ** An Emacs Lisp testing tool is now included.
3501 Emacs Lisp developers can use this tool to write automated tests for
3502 their code. See the ERT info manual for details.
3504 ** Changes for bidirectional display and editing
3506 *** New function `current-bidi-paragraph-direction'.
3507 This returns the base direction of the paragraph at point.
3509 *** New function `bidi-string-mark-left-to-right'.
3510 Given a string containing characters from right-to-left scripts, this
3511 function returns another string which can be safely inserted into a
3512 buffer, such that any following text will be always displayed to the
3513 right of that string. (This works by appending an invisible Unicode
3514 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3516 This is useful when the buffer has overall left-to-right paragraph
3517 direction and you need to insert a string whose contents are not known
3518 in advance, without disrupting the layout of the line.
3522 *** Window tree functions are accessible in Elisp.
3523 Functions are provided to return the parent, siblings or child windows
3524 of any window including internal windows (windows not associated with a
3525 buffer) in the window tree.
3527 **** New function `window-valid-p' gives non-nil for live and internal
3530 **** Window manipulation can deal with internal windows.
3531 Many window handling functions like `split-window', `delete-window', or
3532 `delete-other-windows' as well as the window resizing functions can now
3533 act on any window including internal ones.
3535 *** window-total-height/-width vs window-body-height/-width.
3536 The function `window-height' has been renamed to `window-total-height'
3537 and `window-width' has been renamed to `window-body-width'. The old
3538 names are provided as aliases. Two new functions `window-total-width'
3539 and `window-body-height' are provided.
3541 *** Window parameters specific to window handling functions.
3542 For each window you can specify a parameter to override the default
3543 behavior of a number of functions like `split-window', `delete-window'
3544 and `delete-other-windows'. The variable `ignore-window-parameters'
3545 allows to ignore processing such parameters.
3547 *** New semantics of third argument of `split-window'.
3548 The third argument of `split-window' has been renamed to SIDE and can be
3549 set to any of the values 'below, 'right, 'above, or 'left to make the
3550 new window appear on the corresponding side of the window that shall be
3551 split. Any other value of SIDE will cause `split-window' to split the
3552 window into two side-by-side windows as before.
3554 *** Window resizing functions.
3555 A new standard function for resizing windows called `window-resize' has
3556 been introduced. This and all other functions for resizing windows no
3557 longer delete any windows when they become too small.
3559 *** Deleting the selected window now selects the most recently selected
3560 live window on that frame instead.
3562 *** `adjust-window-trailing-edge' adjustments.
3563 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3564 is able to resize other windows if a window adjacent to the trailing
3565 edge cannot be shrunk any more. This makes its behavior more similar to
3566 that of Emacs 21 without compromising, however, its inability to delete
3567 windows which was introduced in Emacs 22.
3569 *** Window-local buffer lists.
3570 Windows now have local buffer lists. This means that removing a buffer
3571 from display in a window will preferably show the buffer previously
3572 shown in that window with its previous window-start and window-point
3573 positions. This also means that the same buffer may be automatically
3574 shown twice even if it already appears in another window.
3576 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3577 which if non-nil requires the buffer to be displayed in the currently
3578 selected window, signaling an error otherwise. If nil, another window
3579 can be used, e.g. if the selected one is strongly dedicated.
3581 *** `split-window-vertically' and `split-window-horizontally' renamed
3582 to `split-window-below' and `split-window-right' respectively.
3583 The old names are kept as aliases.
3587 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3588 named ACTION, and takes a display action of the same form as
3589 `display-buffer-base-action' (see Changes, above). A non-nil,
3590 non-list value is treated specially, as the old meaning.
3592 **** New variable `display-buffer-overriding-action'.
3594 **** The procedure of `display-buffer' etc. to choose a window is
3595 determined by combining `display-buffer-overriding-action',
3596 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3597 and `display-buffer-fallback-action'. The second and fourth of these
3598 are user-customizable variables.
3600 See the docstring of `display-buffer' for details.
3602 *** New functions `window-state-get' and `window-state-put'.
3603 These functions allow to save and restore the state of an arbitrary
3604 frame or window as an Elisp object.
3608 *** New variable `completion-extra-properties' used to specify extra
3609 properties of the current completion:
3610 - :annotate-function, same as the old completion-annotate-function.
3611 - :exit-function, function to call after completion took place.
3613 *** Functions on `completion-at-point-functions' can return any of the
3614 properties valid for `completion-extra-properties'.
3616 *** `completion-annotate-function' is obsolete.
3618 *** New `metadata' method for completion tables. The metadata thus returned
3619 can specify various details of the data returned by `all-completions':
3620 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3621 used to select a style in completion-category-overrides.
3622 - `annotation-function' to add annotations in *Completions*.
3623 - `display-sort-function' to specify how to sort entries in *Completions*.
3624 - `cycle-sort-function' to specify how to sort entries when cycling.
3626 *** `minibuffer-local-filename-must-match-map' is not used any more.
3627 Instead, the bindings in `minibuffer-local-filename-completion-map'
3628 are combined with `minibuffer-local-must-match-map'.
3630 *** New variable `completing-read-function' allows overriding the
3631 behavior of `completing-read'.
3633 ** `glyphless-char-display' can now distinguish between graphical and
3634 text terminal display, via a char-table entry that is a cons cell.
3636 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3637 Instead, the offending function is removed.
3641 *** New function `run-hook-wrapped' for running an abnormal hook by
3642 passing the hook functions as arguments to a "wrapping" function.
3643 Like `run-hook-with-args-until-success', it stops at the first
3644 non-nil return value.
3646 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3647 set of "wrapping" filters, similar to around advice.
3648 (A version of this macro was actually added in Emacs 23.2 but was not
3649 advertised at the time.)
3653 *** New macro `condition-case-unless-debug' (this was actually added in
3654 Emacs 23.1 as condition-case-no-debug, but not advertised)
3656 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3658 *** Variable `stack-trace-on-error' removed.
3660 *** The debugger can now "continue" from an error, which means it will
3661 jump to the error handler as if the debugger had not been invoked
3662 instead of jumping all the way to the top-level.
3664 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3665 This can be useful when `inhibit-quit' is set.
3667 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3668 named Emacs server instances.
3670 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3671 to redirect STDOUT to a file.
3673 ** The function `format-time-string' now supports the %N directive,
3674 for higher-resolution time stamps.
3676 ** New input reading functions
3678 *** New function `read-char-choice' reads a restricted set of
3679 characters, discarding any inputs not inside the set.
3681 *** The command `read-color' now requires a match for a color name
3682 or RGB triplet, instead of signaling an error if the user provides
3685 **** `facemenu-read-color' is now an alias for `read-color'.
3687 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3688 The variable is now used to load all kind of supported dynamic libraries,
3689 not just image libraries. The previous name is still available as an
3692 ** Syntax parsing changes
3694 *** New variable `syntax-propertize-function'.
3695 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3696 This allows syntax-table properties to be set independently from font-lock:
3697 just call syntax-propertize to make sure the text is propertized.
3698 Together with this new variable come a new hook
3699 syntax-propertize-extend-region-functions, as well as two helper functions:
3700 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3701 as-is; and syntax-propertize-rules which provides a new way to specify
3704 *** Syntax tables support a new "comment style c" additionally to style b.
3706 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3708 ** frame-local variables cannot be let-bound any more.
3710 ** Major and minor mode changes
3712 *** `set-auto-mode' now respects mode: local variables at the end of files,
3713 as well as those in the -*- line.
3715 *** `prog-mode' is a new major mode from which programming modes
3718 **** `prog-mode-hook' can be used to enable features for programming
3719 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3720 on-the-fly spell checking for comments and strings.
3722 *** New hook `change-major-mode-after-body-hook', run by
3723 `run-mode-hooks' just before any other mode hooks.
3725 *** Enabled globalized minor modes can be disabled in specific major modes.
3726 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3727 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3729 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3731 ** File-handling changes
3733 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3734 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3735 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3736 argument is supplied (see Trash changes, above).
3738 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3740 ** Tool-bars can display separators.
3741 Tool-bar separators are handled like menu separators in menu-bar maps,
3742 i.e. via menu entries of the form `(menu-item "--")'.
3746 *** Animated images support (currently animated gifs only).
3748 **** `image-animated-p' returns non-nil if an image can be animated.
3750 **** `image-animate' animates a supplied image spec.
3752 **** `image-animate-timer' returns the timer object for an image that
3755 *** `image-extension-data' has been renamed to `image-metadata'.
3756 The old name is an obsolete alias to the new one.
3758 *** Image mode can view any image type that ImageMagick supports.
3759 This requires Emacs to be built with ImageMagick support.
3761 **** New function `imagemagick-types', defined if ImageMagick support
3762 is enabled, returns a list of image file extensions that your
3763 ImageMagick installation supports.
3765 **** New function `imagemagick-register-types' enables ImageMagick
3766 image types in Image mode and in `create-image' and other helper
3769 **** New option `imagemagick-types-inhibit' excludes certain
3770 ImageMagick image types from `imagemagick-register-types'.
3772 **** With ImageMagick support, there are extra Image mode commands to
3773 resize and rotate images: `image-transform-fit-to-height',
3774 `image-transform-fit-to-width', `image-transform-set-rotation', and
3775 `image-transform-set-scale'.
3777 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3778 passes it to the mail user agent function. This argument specifies an
3779 action for returning to the caller after finishing with the mail. For
3780 example, this is used by Rmail to optionally delete a mail window.
3782 ** XML and HTML parsing
3783 If Emacs is compiled with libxml2 support, there are two new
3784 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3785 and `libxml-parse-xml-region' (which parses XML). Both return an
3786 Emacs Lisp parse tree.
3788 ** Networking and encryption changes
3790 *** `open-network-stream' can now be used to open an encrypted stream.
3791 It now accepts an optional `:type' parameter for initiating a TLS
3792 connection, directly or via STARTTLS. To do STARTTLS, additional
3793 parameters (`:end-of-command', `:success', `:capabilities-command')
3794 must also be supplied.
3796 *** New library gnutls.el.
3797 The new function `gnutls-available-p' returns non-nil if Emacs is
3798 built with GnuTLS support. The main entry points are
3799 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3800 these functions through `open-network-stream', because that can
3801 upgrade connections through STARTTLS opportunistically or use plain
3802 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3805 *** New primitive `secure-hash' that supports many secure hash algorithms:
3806 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3807 sha1.el has been removed. The `sha1' feature is provided by default.
3811 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3813 ** Progress reporters can now "spin".
3814 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3815 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3816 time you call `progress-reporter-update' on that progress reporter,
3817 with a nil or omitted VALUE argument, the reporter message is
3818 displayed with a "spinning bar".
3820 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3821 being reverted, even if the buffer has a local `revert-buffer-function'.
3823 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3824 If delayed-warnings-list is non-nil, the command loop calls
3825 `delayed-warnings-hook' after `post-command-hook'. At present, this
3826 is only used by Emacs on some platforms to display warnings during
3827 startup, which might otherwise not be noticed. This uses the
3828 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3830 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3832 ** New function `make-composed-keymap' that constructs a new keymap
3833 from multiple input maps. You can use this to make a keymap that
3834 inherits from multiple maps, eg:
3835 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3837 ** New function `string-prefix-p'.
3838 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3840 ** New reader macro ## that stands for the empty symbol.
3841 This means that the empty symbol can now be read back. Also, #: by itself
3842 (when not immediately followed by a possible symbol character) stands for
3843 an empty uninterned symbol.
3845 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3847 ** The following functions and variables are obsolete:
3849 *** `tooltip-use-echo-area' is obsolete.
3850 Rather than setting this to t, disable Tooltip mode instead.
3852 *** buffer-substring-filters is obsolete.
3853 Use `filter-buffer-substring-functions' instead.
3855 *** `byte-compile-disable-print-circle' is obsolete.
3857 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3858 Use `post-command-hook' instead.
3860 *** `font-lock-maximum-size' is obsolete.
3863 * Changes in Emacs 24.1 on Non-Free Operating Systems
3865 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3866 and also when HOME is set to C:\ by default.
3868 ** New configure.bat options
3870 *** --enable-checking builds Emacs with extra runtime checks.
3872 *** --distfiles specifies files to be included in binary distribution.
3874 *** --without-gnutls disables automatic GnuTLS detection.
3876 *** --lib for general library linkage, works with the USER_LIBS build variable.
3878 ** New make target `dist' to create binary distribution for MS Windows.
3880 ** The Lisp function `w32-default-color-map' is now obsolete.
3881 (It is only used internally in the Emacs C code.)
3883 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3884 reappear on mouse-over. (Requires OS X 10.6 or later.)
3886 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3887 other platforms, rather than inserting its contents into the buffer.
3890 ----------------------------------------------------------------------
3891 This file is part of GNU Emacs.
3893 GNU Emacs is free software: you can redistribute it and/or modify
3894 it under the terms of the GNU General Public License as published by
3895 the Free Software Foundation, either version 3 of the License, or
3896 (at your option) any later version.
3898 GNU Emacs is distributed in the hope that it will be useful,
3899 but WITHOUT ANY WARRANTY; without even the implied warranty of
3900 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3901 GNU General Public License for more details.
3903 You should have received a copy of the GNU General Public License
3904 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3909 paragraph-separate: "[
\f]*$"