1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
31 FIXME? Should be --without-acl?
33 ** Emacs can now be compiled with file notification support.
34 This happens by default if a suitable system library is found at
35 build time. To prevent this, use the configure option
36 `--without-file-notification'. See below for file-notify features.
37 FIXME? This feature is not available for the Nextstep port. (?)
40 ** The configure option `--without-compress-info' has been generalized,
41 and renamed to `--without-compress-install'. It now prevents compression
42 of _any_ files during installation.
45 ** The configure option `--with-crt-dir' has been removed.
46 It is no longer needed, as the crt*.o files are no longer linked specially.
49 ** Directories passed to configure option `--enable-locallisppath' are
50 no longer created during installation.
52 ** Emacs can be compiled with zlib support.
53 If this library is present (which it normally is on most systems), the
54 function `zlib-decompress-region' becomes available, which can
55 decompress gzip- and zlib-format compressed data.
58 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
59 This requires pkg-config to be available at configure time.
62 * Startup Changes in Emacs 24.4
65 ** When initializing `load-path', an empty element in the EMACSLOADPATH
66 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
67 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
68 load-path (the one that would have been used if EMACSLOADPATH was unset).
69 This makes it easier to _extend_ the load-path via EMACSLOADPATH
70 (previously, EMACSLOADPATH had to specify the complete load-path,
71 including the defaults). (In older versions of Emacs, an empty element
72 was replaced by ".", so use an explicit "." now if that is what you want.)
75 ** The -L option, which normally prepends its argument to load-path,
76 will instead append, if the argument begins with `:' (or `;' on MS Windows;
77 i.e., `path-separator').
80 ** If you use either site-load.el or site-init.el to customize the dumped
81 Emacs executable, any changes to `load-path' that these files make
82 will no longer be present after dumping. To affect a permanent change
83 to `load-path', use the `--enable-locallisppath' option of `configure'.
86 ** The user option `initial-buffer-choice' can now specify a function
87 to set up the initial buffer.
90 * Changes in Emacs 24.4
93 ** New option `gnutls-verify-error', if non-nil, means that Emacs
94 should reject SSL/TLS certificates that GnuTLS determines as invalid.
95 (This option defaults to nil at present, but this is expected to change
99 ** Emacs now supports menus on text-mode terminals.
100 If the terminal supports a mouse, clicking on the menu bar, or on
101 sensitive portions of the mode line or header line, will drop down the
102 menu defined at that position. Likewise, clicking C-mouse-2 or
103 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
106 If the text terminal does not support a mouse, you can activate the
107 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
109 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
110 customize the option `tty-menu-open-use-tmm' to a non-nil value.
111 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
115 ** The *Messages* buffer is created in `messages-buffer-mode',
116 a new major mode, with read-only status. Any code that might create
117 the *Messages* buffer should call the function `messages-buffer' to do
118 so and set up the mode.
120 ** Emacs now supports ACLs (access control lists).
122 *** Emacs preserves the ACL entries of files when backing up.
124 *** New functions `file-acl' and `set-file-acl' get and set the ACL
125 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
126 libacl. On MS-Windows, the NT Security APIs are used to emulate the
127 POSIX ACL interfaces.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as if they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
144 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
145 You can change the default by customizing `blink-cursor-blinks'.
148 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
149 This affects View mode, etc.
154 *** The command `apropos-variable' is renamed to `apropos-user-option'.
155 `apropos-user-option' shows all user options while `apropos-variable'
156 shows all variables. When called with a universal prefix argument,
157 the two commands swap their behaviors. When `apropos-do-all' is
158 non-nil, they output the same results.
161 *** The key `?' now describes prefix bindings, like `C-h'.
164 *** The command `describe-function' has been extended for EIEIO.
165 Running it on constructors will show a full description of the
166 generated class. For generic functions, it will show all
167 implementations together with links to the source. The old commands
168 `describe-class', `describe-constructor' and `describe-generic' were
172 *** The function `quail-help' is no longer an interactive command.
173 Use `C-h C-\' (`describe-input-method') instead.
178 *** ImageMagick images now support the :max-width and :max-height keywords.
181 *** When using `create-image' with image data, you can pass a :format
182 attribute (via the property-list argument) in order to help
183 ImageMagick detect the image type. The value should be a MIME
184 content-type that is found in the new variable `image-format-suffixes'.
186 ** Frame and window changes
189 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
190 bound to <f11> and M-<f10>, respectively.
193 *** New hooks `focus-in-hook', `focus-out-hook'.
194 These are normal hooks run when an Emacs frame gains or loses input focus.
196 *** Emacs can now change frame sizes in units of pixels, rather than
197 text rows or columns. When maximizing a frame or making it fullscreen,
198 remaining extra pixels are no longer given to the minibuffer, the rightmost
199 fringe, or other unusable space, but are distributed among the text
200 areas of the frame's windows. If the new option `frame-resize-pixelwise'
201 is non-nil, all frame size changes happen pixelwise and set the
202 corresponding size hints for the window manager.
204 *** Emacs can now change window sizes in units of pixels.
205 Mouse-dragging a mode line or window divider now changes the size of
206 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
207 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
208 resize windows pixelwise. Most functions for changing or accessing
209 window sizes now have an additional argument that allows changes to apply,
210 or values to be returned, in pixels instead of lines/columns.
212 *** Emacs can now draw dividers between adjacent windows. To put
213 dividers between side-by-side/vertically stacked windows customize the
214 frame parameters `right-divider-width' and `bottom-divider-width' to
215 some positive integer. You can drag dividers with the mouse (they show
216 a corresponding cursor when the mouse hovers over them). You can change
217 the appearance of dividers by customizing the faces `window-divider',
218 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
219 two are useful to provide a 3D effect, or to better distinguish dividers
220 from surrounding display objects.
222 *** New functions are provided to return the pixel sizes of window
223 components, namely `window-scroll-bar-width', `window-mode-line-height'
224 `window-header-line-height', `window-right-divider-width' and
225 `window-bottom-divider-width'.
227 *** The new function `window-text-pixel-size' returns the size of the
228 text of a window's buffer in pixels. This allows functions like
229 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
230 window to its buffer as it will be displayed.
232 *** `fit-window-to-buffer' can now resize windows horizontally.
233 This behavior is controlled by the new option
234 `fit-window-to-buffer-horizontally'.
236 *** `fit-frame-to-buffer' can now fit frames in both directions.
237 This behavior is controlled by the option `fit-frame-to-buffer' which
238 tells in which direction(s) the frame shall be fit. The new options
239 `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes' allow to
240 control the size of the frame and its position on screen.
242 *** Temp Buffer Resize Mode can now adjust height and width of windows
243 and frames. `temp-buffer-resize-mode' is now able to adjust the height
244 and the width of a window displaying a temporary buffer. The new option
245 `temp-buffer-max-width' allows to control the width of temporary buffer
246 windows. Moreover, if the new option `fit-frame-to-buffer' is non-nil
247 and the buffer appears in the root window of a frame, Temp Buffer Resize
248 Mode will try to adjust width and/or height of the frame.
251 *** `split-window' is now a non-interactive function, not a command.
252 As a command, it was a special case of `C-x 2' (`split-window-below'),
253 and as such superfluous. After being reimplemented in Lisp, its
254 interactive form was mistakenly retained.
256 *** The functions `window-size' and `window-total-size' now have an
257 optional argument to return a rounded size value.
259 *** `window-state-put' now allows to put a window state into internal
263 *** New option `scroll-bar-adjust-thumb-portion'.
264 Available only on X, this option allows to control over-scrolling
265 using the scroll bar (i.e. dragging the thumb down even when the end
266 of the buffer is visible).
268 *** New basic action function `display-buffer-in-previous-window' has
269 `display-buffer' display a buffer in a window previously showing that
272 *** New basic action function `display-buffer-at-bottom' has
273 `display-buffer' choose or make a window at the bottom of the selected
276 ** Lisp evaluation changes
278 *** `eval-defun' on an already defined defcustom calls the :set function,
282 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
283 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
284 zero prefix argument. This disables truncation of lists in the output,
285 equivalent to setting `(eval-expression-)print-length' and
286 `(eval-expression-)print-level' to nil. Additionally, it causes integers
287 to be printed in other formats (octal, hexadecimal, and character).
290 *** New hook `eval-expression-minibuffer-setup-hook' run by
291 `eval-expression' on entering the minibuffer.
294 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
297 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
298 because it affects caching of paragraph scanning results as well.
299 There is no reason to set this to nil except for debugging purposes.
302 ** The option `set-mark-default-inactive' has been deleted.
303 This unfinished feature was introduced by accident in Emacs 23.1;
304 simply disabling Transient Mark mode does the same thing.
307 ** The default value of `comment-use-global-state' is now t,
308 and this variable has been marked obsolete.
311 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
312 and works for git too, if you fetch the repository notes.
315 ** New option `load-prefer-newer' affects how the `load' function chooses
316 the file to load. If this is non-nil, then when both .el and .elc
317 versions of a file exist, and the caller did not explicitly specify
318 which one to load, then the newer file is loaded. The default, nil,
319 means to always load the .elc file.
322 * Editing Changes in Emacs 24.4
324 ** Indentation changes
327 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
328 When invoked without a prefix argument, it now activates a transient
329 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
330 the text indentation in the region. Typing any other key resumes
331 normal editing behavior.
333 *** `electric-indent-mode' is enabled by default.
336 *** `tab-stop-list' is now implicitly extended to infinity by repeating
337 the last step. Its default value is changed to nil, which means a tab
338 stop every `tab-width' columns.
341 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
342 When called in succession, it cycles between spacing conventions:
343 one space, no spaces, original spacing.
346 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
347 a line after a one-letter word, which is an error in some typographical
348 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
351 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
353 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
354 Most commands are still unaware of it, but kill/yank do work on the rectangle.
357 ** New option `visual-order-cursor-movement'.
358 If this is non-nil, cursor motion with arrow keys will follow the
359 visual order of characters on the screen: <left> always moves to the
360 left, <right> always moves to the right, disregarding the surrounding
361 bidirectional context.
366 *** All interactive commands that read a register (`copy-to-register', etc.)
367 now display a temporary window after `register-preview-delay' seconds
368 that summarizes existing registers. To disable this, set that option to nil.
369 Interactive commands that read registers and want to make use of this
370 should use `register-read-with-preview' to read register names.
373 *** New command `frameset-to-register' bound to `C-x r f', replacing
374 `frame-configuration-to-register'. It offers similar functionality,
375 plus enhancements like the ability to restore deleted frames.
376 (`frame-configuration-to-register' still exists, but no longer has a
380 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
384 ** New command `delete-duplicate-lines'.
385 This searches the region for identical lines, and removes all but one
386 copy of each repeated line. The lines need not be sorted.
389 * Changes in Specialized Modes and Packages in Emacs 24.4
392 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
394 ~/.emacs.d/timelog replaces ~/.timelog
395 ~/.emacs.d/vip replaces ~/.vip
396 ~/.emacs.d/viper replaces ~/.viper
397 ~/.emacs.d/ido.last replaces ~/.ido.last
398 ~/.emacs.d/kkcrc replaces ~/.kkcrc
399 ~/.emacs.d/quickurls replaces ~/.quickurls
400 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
401 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
402 ~/.emacs.d/places replaces ~/.emacs-places
403 ~/.emacs.d/shadows replaces ~/.shadows
404 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
405 ~/.emacs.d/strokes replaces ~/.strokes
406 ~/.emacs.d/notes replaces ~/.notes
407 ~/.emacs.d/type-break replaces ~/.type-break
408 Also the following files used by the now obsolete otodo-mode.el:
409 ~/.emacs.d/todo-do replaces ~/.todo-do
410 ~/.emacs.d/todo-done replaces ~/.todo-done
411 ~/.emacs.d/todo-top replaces ~/.todo-top
413 ** Backtrace and debugger
416 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
417 display of local variables of the current stack frame.
419 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
420 the lexical environment when evaluating the code in the context at point
421 (and so allows you to access lexical variables).
424 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
427 ** Battery information can now be retrieved from BSD's `apm' utility.
430 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
432 ** Calendar and Diary
435 *** New faces `calendar-weekday-header', `calendar-weekend-header',
436 and `calendar-month-header'.
439 *** New option `calendar-day-header-array'.
442 *** New variable `diary-from-outlook-function', used by the command
443 `diary-from-outlook'.
446 *** The variable `calendar-font-lock-keywords' is obsolete.
451 *** Calc by default now uses the Gregorian calendar for all dates, and
452 uses January 1, 1 AD as its day number 1. Previously Calc used the
453 Julian calendar for dates before September 14, 1752, and it used
454 December 31, 1 BC as its day number 1; the new scheme is more
455 consistent with Calendar's calendrical system and day numbering.
458 *** The new option `calc-gregorian-switch' lets you configure if
459 (and when) Calc switches from the Julian to the Gregorian calendar.
462 *** Support for ISO 8601 dates.
468 **** The cpp-root project now supports executing a compile command.
469 It can be set through the new :compile-command slot or the
470 buffer-local variable `compile-command'.
472 **** Better selection of include directories for the 'linux' project.
473 Include directories now support out-of-tree build directories and
474 target architecture auto-detection.
478 **** Improved detection of used namespaces in current scope in C++.
480 **** Parsing of default values for variables and function arguments in C/C++.
481 They are also displayed by the summarize feature in the mode line.
483 **** Improved parsing of function pointers in C/C++.
484 This also includes parsing of function pointers as function arguments.
486 **** Parsing of C/C++ preprocessor macros that open new scope.
487 For example, this enables parsing of macros that open new namespaces.
489 **** Support for 'this' pointer in inline member functions in C++.
494 *** New macro `cl-tagbody'.
495 This executes statements while allowing for control transfer to labels.
498 *** letf is now just an alias for cl-letf.
503 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
504 Hence, you can now enable it independently from those modes, and from
505 `transient-mark-mode'.
508 *** `cua-highlight-region-shift-only' is now obsolete.
509 You can disable `transient-mark-mode' to get the same result.
512 *** CUA's rectangles can now be used without CUA by calling the command
513 `cua-rectangle-mark-mode'.
518 *** Support for completion, ElDoc, and Flycheck has been added.
521 *** The current CFEngine syntax is parsed from "cf-promises -s json".
522 There is a fallback syntax available if you don't have cf-promises or
523 if your version doesn't support that option. See option `cfengine-cf-promises'.
526 ** Delete Selection mode can now be used without Transient Mark mode.
531 *** `desktop-save-mode' by default now auto-saves an existing desktop file
532 after `desktop-auto-save-timeout'. To disable this, customize that option
535 *** `desktop-restore-frames', enabled by default, allows saving and
536 restoring the frame/window configuration (frameset). Additional options
537 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
538 and `desktop-restore-forces-onscreen' offer further customization.
541 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
542 such as file ownership or permissions, are visible.
545 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
546 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
547 The results display in the mode line.
549 ** Electric Pair mode
552 *** New option `electric-pair-preserve-balance', enabled by default.
553 If non-nil, pairing/skipping only kicks in when that help the balance
554 of parentheses and quotes, i.e. the buffer should end up at least as
557 You can further control this behavior by adjusting the predicates
558 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
561 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
562 In `electric-pair-mode', the commands `backward-delete-char' and
563 `backward-delete-char-untabify' are now bound to electric variants
564 that delete the closer when invoked between adjacent pairs.
567 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
568 In `electric-pair-mode', inserting a newline between adjacent pairs
569 opens an extra newline after point, which is indented if
570 `electric-indent-mode' is also set.
573 *** New option `electric-pair-skip-whitespace', enabled by default.
574 This controls if skipping over closing delimiters should jump over any
575 whitespace slack. Setting it to `chomp' makes it delete this
576 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
579 *** New variables control the pairing in strings and comments.
580 You can customize `electric-pair-text-pairs' and
581 `electric-pair-text-syntax-table' to tweak pairing behavior inside
582 strings and comments.
585 ** New EPA option `epa-mail-aliases'.
586 You can set this to a list of email address aliases that `epa-mail-encrypt'
587 should use to find keys.
590 ** New ERC option `erc-accidental-paste-threshold-seconds'.
591 If set to a number, this can be used to avoid accidentally pasting large
592 amounts of data into the ERC input.
595 ** New ERT macro `skip-unless' allows skipping ERT tests.
596 See the ERT manual for details.
601 *** `eshell' now supports visual subcommands and options.
602 Eshell has been able to handle "visual" commands (interactive,
603 non-line oriented commands such as top that require display
604 capabilities not provided by eshell) by running them in an Emacs
605 terminal emulator. See `eshell-visual-commands'.
607 This feature has been extended to subcommands and options that make a
608 usually line-oriented command a visual command. Typical examples are
609 "git log" and "git <command> --help", which display their output in a
610 pager by default. See `eshell-visual-subcommands' and
611 `eshell-visual-options'.
614 *** New Eshell-Tramp module.
615 External su and sudo commands are now the default; the internal,
616 Tramp-using variants can still be used by enabling the eshell-tramp
620 ** New F90 mode option `f90-smart-end-names'.
623 Icomplete is now more similar to Ido.
626 *** Icomplete by default now applies to all forms of minibuffer completion.
627 The variable `icomplete-with-completion-tables' (now a user option)
628 controls this. To restore the old behavior, set it back to
629 '(internal-complete-buffer).
632 *** You can navigate through and select completions using the keys
633 from `icomplete-minibuffer-map'.
636 *** The string that separates potential completions is now a customizable
637 option (`icomplete-separator'). The default is " | " rather than ",".
640 *** New face `icomplete-first-match'; and new options
641 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
644 *** The option `icomplete-show-key-bindings' has been removed.
649 *** An Ido user manual is now included.
652 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
653 This means to use virtual buffers if the current ido input does not match
657 *** The variable `ido-decorations' can optionally have two new elements,
658 which are the brackets to use around the sole remaining completion.
663 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
664 visit the next image file and the previous image file in the same
665 directory, respectively.
668 *** New commands to show specific frames of multi-frame images.
669 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
670 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
673 *** New commands to speed up, slow down, or reverse animation.
674 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
675 speed up and slow down the animation. `a r' (`image-reverse-speed')
676 to reverse it and `a 0' (`image-reset-speed') to reset it.
679 *** The command `image-mode-fit-frame' deletes other windows.
680 When toggling, it restores the frame's previous window configuration.
681 It also has an optional frame argument, which can be used by Lisp
682 callers to fit the image to a frame other than the selected frame.
687 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
688 the symbol found near point.
691 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
692 will cycle through faces in `hi-lock-face-defaults' without prompting.
695 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
700 *** New Info face `info-index-match', used to highlight matches in index
701 entries displayed by `Info-index-next', `Info-virtual-index' and
705 *** The Info-edit command is obsolete. Editing Info nodes by hand
706 has not been relevant for some time.
711 *** New option `js-switch-indent-offset'.
714 *** Better indentation of multiple-variable declarations.
715 If a declaration spans several lines, variables on the following lines
716 are lined up to the first one.
719 *** Recognition and better indentation of continuations in array comprehensions.
722 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
727 *** Font locking for texinfo comments and new keywords.
729 *** Completion in Octave file buffers.
733 *** Jump to definition.
735 *** Documentation lookup/search.
738 ** OPascal mode is the new name for Delphi mode
741 *** All delphi-* variables and functions have been renamed to opascal-*.
742 Obsolete aliases exist for those likely to have been used externally.
745 *** The option `delphi-newline-always-indents' has been removed.
746 Use `electric-indent-mode' instead.
749 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
754 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
755 to filter the list of packages by a keyword.
758 *** In the `describe-package' buffer, there are now buttons listing the
759 keywords related to the package. Click on a button to see other packages
760 related to that keyword.
763 *** The format of `archive-contents' files, generated by package
764 repositories, has changed to allow a new (fifth) element in the data
765 vectors, containing an associative list with extra properties.
766 (For example, `describe-package' uses the `:url' extra property to
767 display a "Homepage" header.)
770 ** In Prolog mode, `prolog-use-smie' has been removed,
771 along with the non-SMIE indentation code.
776 *** The new command `remember-notes' creates a buffer that is saved on exit.
777 You can use it as a more permanent *scratch* buffer.
780 *** Remember can now store notes in separate files.
781 To use this, add `remember-store-in-files' to the `remember-handler-functions'
782 option. The files are saved in `remember-data-directory' using
783 names specified by `remember-directory-file-name-format'.
788 *** Customize `rmail-mbox-format' to influence some minor aspects of
789 how Rmail displays non-MIME messages.
792 *** The `unrmail' command now converts from BABYL to mboxrd format,
793 rather than mboxo. Customize `unrmail-mbox-format' to change this.
798 *** Improved syntax highlighting and indentation.
801 *** New `electric-indent-mode' integration.
804 *** New option `ruby-encoding-magic-comment-style'.
807 *** New option `ruby-custom-encoding-magic-comment-template'.
810 *** New option `ruby-align-to-stmt-keywords'.
813 *** New option `ruby-align-chained-calls'.
816 *** More Ruby file types have been added to `auto-mode-alist'.
818 ** Search and Replace
821 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
822 starts a symbol (identifier) incremental search forward with the
823 symbol found near point added to the search string initially.
826 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
827 and adds it to the search string.
829 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
831 *** `query-replace' skips invisible text when `search-invisible' is nil,
832 and opens overlays with hidden text when `search-invisible' is `open'.
835 *** A negative prefix arg of replacement commands replaces backward.
836 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
837 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
840 *** By default, prefix arguments do not now terminate Isearch mode.
841 Set `isearch-allow-prefix' to nil to restore old behavior.
844 *** More Isearch commands accept prefix arguments, namely
845 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
849 *** Word search now matches whitespace at the beginning/end
850 of the search string if it contains leading/trailing whitespace.
851 In an incremental word search or when using a non-nil LAX argument
852 of `word-search-regexp', the lax matching can also match part of
853 the first word (in addition to the lax matching of the last word).
854 The same rules are now applied to the symbol search with the difference
855 that it matches symbols, and non-symbol characters between symbols.
858 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
861 ** The shell.el option `explicit-bash-args' includes --noediting by default.
862 All non-ancient Bash versions support this option.
867 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
870 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
872 ** SMIE indentation can be customized via `smie-config'.
873 Emacs can learn the appropriate indentation settings if you provide it
874 with an indented sample file.
879 *** Improved login monitoring and appropriate response to login failures.
880 New variable `sql-login-delay' defines maximum wait time for a connection.
883 SQL*Plus script placeholders are properly highlighted and identified
884 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
885 are passed before the logon parameter, as required. The default now
886 includes `-L', to limit the number of logon attempts per invocation.
889 ** New Term mode option `term-suppress-hard-newline'.
892 ** Todo mode has been rewritten and enhanced.
893 The Todo mode user manual describes all commands and most user
894 options. To support some of these features, a new file format is
895 used, which is incompatible with the old format; however, you can
896 convert old todo and done item files to the new format on initializing
897 the first new todo file, or at any later time with the provided
898 conversion command. The previous version of todo-mode.el has been
899 renamed to otodo-mode.el and is now obsolete. New features include:
901 *** Support for multiple todo files and archive files of done items.
903 *** Renaming, reordering, moving, merging, and deleting categories.
905 *** Sortable tabular summaries of categories and the item types they contain.
907 *** Cross-category lists of items filtered by specific criteria.
909 *** More fine-grained interaction with the Emacs diary, by being able to
910 decide for each todo item whether it appears in the Fancy Diary display.
912 *** Highly flexible new item insertion and item editing.
914 *** Moving items between categories, storing done items in their category
915 or in archive files, undoing or unarchiving done items.
917 *** Reprioritizing items by inputting a numerical priority.
919 *** Extensive customizability of operation and display, including many faces.
924 *** `trace-function' and `trace-function-background' no longer prompt for
925 the output buffer. Unless you use a prefix argument, they output to
929 *** With a prefix argument, `trace-function' and `trace-function-background'
930 will prompt for a "context". This is a Lisp expression, whose value at the
931 time the function is entered/exited is printed along with the function's
937 *** The experimental url syntax for remote file names has been removed.
940 *** New connection method "adb", which allows to access Android
941 devices by the Android Debug Bridge. The variable `tramp-adb-program'
942 can be used to adapt the path of the "adb" program, if needed.
945 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
946 "scpc" and "rsyncc" are discontinued. The ssh option
947 "ControlMaster=auto" is set automatically in all ssh-based methods,
948 when possible. See `tramp-use-ssh-controlmaster-options'.
951 *** Handlers for `file-acl' and `set-file-acl' for remote machines
952 which support POSIX ACLs.
955 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
956 for remote machines which support filesystem notifications.
959 ** New URL command `url-cookie-list' displays the current cookies,
960 and allows you to interactively remove cookies.
962 ** VC and related modes
965 *** In VC directory mode, `D' displays diffs between VC-controlled
966 whole tree revisions.
969 *** In VC directory mode, `L' lists the change log for the current VC
970 controlled tree in a window.
973 *** In VC directory mode, `I' shows a log of changes that will be
974 received with a pull operation.
977 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
978 under current version control system. When called with a prefix
979 argument, you can remove a file from the ignored file list.
984 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
987 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
990 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
991 are obsolete. Customize the `woman-*' faces instead.
996 *** iswitchb.el; use icomplete-mode.
999 *** longlines.el; use visual-line-mode.
1008 *** terminal.el; use term.el instead.
1011 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1014 *** xesam.el (owing to the cancellation of the XESAM project).
1017 *** yow.el; use fortune.el or cookie1.el instead.
1020 * New Modes and Packages in Emacs 24.4
1023 ** New package `eww' is a built-in web browser.
1024 It is only available if Emacs is compiled with libxml2 support.
1027 ** New minor mode `superword-mode'.
1028 This overrides the default word motion commands to treat "symbol_words"
1029 as a single word, similar to what `subword-mode' does.
1032 ** New package nadvice.el offers lighter-weight advice facilities.
1035 *** add-function/remove-function, which can be used to add/remove code on any
1036 function-carrying place, such as process-filters or `<foo>-function' hooks.
1038 *** advice-add/advice-remove to add/remove a piece of advice on a named
1039 function, much like `defadvice' does.
1041 ** New package frameset.el.
1042 It provides a set of operations to save a frameset (the state of all
1043 or a subset of the existing frames and windows, somewhat similar to a
1044 frame configuration), both in-session and persistently, and restore it
1045 at some point in the future.
1048 ** New package filenotify.el provides an interface for file system
1049 notifications. It requires that Emacs be compiled with one of the
1050 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1053 * Incompatible Lisp Changes in Emacs 24.4
1056 ** `kill-region' has lost its `yank-handler' optional argument.
1059 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1060 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1063 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1066 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1067 Some languages match those as »...«, and others as «...», so it is
1068 better for Emacs to stay neutral by default.
1071 ** In compiled Lisp files, the header no longer includes a timestamp.
1074 ** The default file coding for Emacs Lisp files is now utf-8.
1075 (See `file-coding-system-alist'.) In most cases, this change is
1076 transparent, but files that contain unusual characters without
1077 specifying an explicit coding system may fail to load with obscure
1078 errors. You should either convert them to utf-8 or add an explicit
1082 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1083 It used to disable the minor mode, major mode, and text-property keymaps,
1084 whereas now it simply has higher precedence.
1087 ** Default process filters and sentinels are not nil any more.
1088 Instead they default to a function that does what the nil value used to do.
1091 ** `read-event' does not return decoded chars in ttys any more.
1092 As was the case in Emacs 22 and before, the decoding of terminal
1093 input, according to `keyboard-coding-system', is not performed in
1094 `read-event' any more. But unlike in Emacs 22, this decoding is still
1095 done before input-decode-map, function-key-map, etc.
1098 ** The option `inhibit-local-menu-bar-menus' has been removed.
1101 ** Frame-local variables that affect redisplay do not work any more.
1102 More specifically, redisplay does not bother to check for a frame-local
1103 value when looking up variables.
1106 ** nil and "unbound" are indistinguishable in `symbol-function'.
1107 `symbol-function' does not signal a `void-function' error any more.
1108 To determine if a symbol's function definition is void, use `fboundp'.
1111 ** `defadvice' does not honor the `freeze' flag and cannot advise
1112 special-forms any more.
1115 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1116 when lexical binding is enabled. Previously, VAR was bound to nil,
1117 which often led to spurious unused-variable warnings.
1120 ** The return value of `backup-buffer' has changed.
1121 The second argument is no longer an SELinux context, instead it is an
1122 alist of extended attributes as returned by the new function
1123 `file-extended-attributes'. The attributes can be applied to another
1124 file using `set-file-extended-attributes'.
1127 ** By default `copy-file' no longer copies file permission bits to an
1128 existing destination; and it sets the file permission bits of a newly
1129 created destination to those of the source, masked by the default file
1130 permissions. To copy the file permission bits, pass t as the
1131 PRESERVE-PERMISSIONS argument of `copy-file'.
1134 ** `visited-file-modtime' now returns -1 for nonexistent files.
1135 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1136 in the presence of files with negative time stamps.
1139 ** The cars of the elements in `interpreter-mode-alist' are now
1140 treated as regexps rather than literal strings.
1143 * Lisp Changes in Emacs 24.4
1146 ** The second argument of `eval' can now specify a lexical environment.
1149 ** New functions `special-form-p' and `macrop'.
1151 ** New macro `define-alternatives' can be used to define generic commands.
1152 Generic commands are interactive functions whose implementation can be
1153 selected among several alternatives, as a matter of user preference.
1156 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1157 on that symbol will use the associated value as a function to call
1161 ** New variable `enable-dir-local-variables'.
1162 Directory-local variables are ignored if this is nil. This may be
1163 useful for modes that want to ignore directory-locals while still
1164 respecting file-local variables.
1167 ** New function `get-pos-property'.
1170 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1171 as a function to call to provide default values.
1173 ** Completion changes
1175 *** The separator for `completing-read-multiple' can now be a regexp.
1176 The default separator has been changed to allow surrounding spaces
1179 *** The `common-substring' arg of `display-completion-list' is obsolete.
1180 Either use `completion-all-completions', which returns highlighted
1181 strings (including for partial or substring completion), or call
1182 `completion-hilit-commonality' to add the highlight.
1184 *** New function `completion-table-with-cache' is a wrapper for
1185 `completion-table-dynamic' that caches the result of the last lookup.
1187 *** New function `completion-table-merge' to combine several
1188 completion tables by merging their completions.
1190 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1191 let you enable symbol prettification (replacing a string like "lambda" with
1192 the Greek lambda character).
1197 *** Functions to pop up menus and dialogs now work on all terminals,
1198 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1199 `message-box', `yes-or-no-p', etc.
1201 The function `display-popup-menus-p' will now return non-nil for a
1202 display or frame whenever a mouse is supported on that display or
1205 *** New hook `tty-setup-hook'.
1209 *** New display action function `display-buffer-no-window' to not
1210 display the buffer in a window.
1212 *** New display action alist entry `allow-no-window' to indicate the
1213 caller of `display-buffer' is ready to handle the case of not
1214 displaying the buffer in a window.
1216 ** New hook `pre-redisplay-function'.
1219 ** New bool-vector set operation functions
1220 *** `bool-vector-exclusive-or'
1221 *** `bool-vector-union'
1222 *** `bool-vector-intersection'
1223 *** `bool-vector-set-difference'
1224 *** `bool-vector-not'
1225 *** `bool-vector-subsetp'
1226 *** `bool-vector-count-consecutive'
1227 *** `bool-vector-count-population'
1230 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1232 ** Error-handling changes
1235 *** New function `define-error'.
1238 *** `with-demoted-errors' takes an additional argument `format'.
1241 ** New macro `with-eval-after-load'.
1242 This is like the old `eval-after-load', but better behaved.
1245 ** New library subr-x.el with miscellaneous small utility functions
1246 *** `hash-table-keys'
1247 *** `hash-table-values'
1248 *** `string-blank-p'
1249 *** `string-empty-p'
1251 *** `string-reverse'
1252 *** `string-trim-left'
1253 *** `string-trim-right'
1255 *** `string-remove-prefix'
1256 *** `string-remove-suffix'
1259 ** Obsoleted functions
1262 *** `lisp-complete-symbol'
1263 *** `field-complete'
1264 *** `minibuffer-completion-contents'
1265 *** `isearch-nonincremental-exit-minibuffer'
1266 *** `isearch-filter-visible'
1267 *** `generic-make-keywords-list'
1268 *** `get-upcase-table' (use `case-table-get-table' instead).
1270 ** `with-wrapper-hook' is obsoleted by `add-function'.
1271 The few hooks that used with-wrapper-hook are replaced as follows:
1272 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1273 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1274 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1277 ** `byte-compile-interactive-only-functions' is now obsolete.
1278 To specify that a command should only be called interactively, give it
1279 a non-nil `interactive-only' property.
1282 ** `split-string' now takes an optional argument TRIM.
1283 The value, if non-nil, is a regexp that specifies what to trim from
1284 the start and end of each substring.
1287 ** New function `string-suffix-p'.
1289 ** File-handling changes
1292 *** Support for filesystem notifications.
1293 Emacs now supports notifications of filesystem changes, such as
1294 creation, modification, and deletion of files. This requires the
1295 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1296 MS-Windows systems, this is supported for Windows XP and newer
1300 *** The 9th element returned by `file-attributes' is now unspecified.
1301 Formerly, it was t if the file's gid would change if file were deleted
1302 and recreated. This value has been inaccurate for years on many
1303 platforms, and nobody seems to have noticed or cared.
1306 *** The 6th argument to `copy-file' has been renamed to
1307 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1308 Unix file permission bits as well as SELinux context.
1311 *** The function `file-ownership-preserved-p' now has an optional
1312 argument GROUP which causes it check for file group too. This can be
1313 used in place of the 9th element of `file-attributes'.
1316 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1317 argument, with the same interpretation as the returned value of
1318 `visited-file-modtime'.
1320 ** Autorevert changes
1323 *** If Emacs is compiled with file notification support, notifications
1324 are used instead of checking the time stamp of the files. You can
1325 disable this by setting the user option `auto-revert-use-notify' to
1326 nil. Alternatively, a regular expression of directories to be
1327 excluded from file notifications can be specified by
1328 `auto-revert-notify-exclude-dir-regexp'.
1331 *** The new user option `auto-revert-remote-files' enables reversion
1332 of remote files when set to non-nil.
1336 *** The function `face-spec-set' is now like `setq' for face specs.
1337 Its third arg now accepts values specifying a face spec type (defface,
1338 custom, or override spec), and the relevant spec is set accordingly.
1341 *** New function `add-face-text-property', which can be used to
1342 conveniently prepend/append new face properties.
1344 *** Face specs set via Custom themes now replace the `defface' spec
1345 rather than inheriting from it (as do face specs set via Customize).
1347 *** New face characteristic (supports :underline (:style wave))
1348 specifies whether or not the terminal can display a wavy line.
1351 *** New face spec attribute :distant-foreground
1352 specifies foreground to use if background color is near the foreground
1353 color that would otherwise have been used.
1358 *** `image-animated-p' is now `image-multi-frame-p'.
1359 It returns non-nil for any image that contains multiple frames,
1360 whether or not it specifies a frame delay.
1363 *** New variable `image-default-frame-delay' gives the frame delay for
1364 animated images which do not specify a frame delay.
1367 *** New functions `image-current-frame' and `image-show-frame' for getting
1368 and setting the current frame of a multi-frame image.
1373 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1374 **** object-name -> eieio-object-name
1375 **** object-class -> eieio-object-class
1376 **** object-class-fast -> eieio--object-class
1377 **** object-class-name -> eieio-object-class-name
1378 **** object-name-string -> eieio-object-name-string
1379 **** object-num-slots -> eieio--object-num-slots
1380 **** object-set-name-string -> eieio-object-set-name-string
1381 **** class-of -> eieio-object-class
1382 **** class-name -> eieio-class-name
1383 **** class-parent -> eieio-class-parent
1384 **** class-parents -> eieio-class-parents
1385 **** class-parents-fast -> eieio-class-parents-fast
1386 **** class-children -> eieio-class-children
1387 **** class-num-slots -> eieio--class-num-slots
1388 **** class-precedence-list -> eieio-class-precedence-list
1389 **** class-direct-subclasses -> eieio-class-children
1390 **** class-direct-superclasses -> eieio-class-parents
1392 ** Changes in encoding and decoding of text
1395 *** New coding-system `prefer-utf-8'.
1396 This is like `undecided' but prefers UTF-8 on decoding if the text to
1397 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1398 any non-ASCII characters are automatically encoded as UTF-8.
1401 *** New attributes of coding-systems whose type is `undecided'.
1402 Two new attributes, `:inhibit-null-byte-detection' and
1403 `:inhibit-iso-escape-detection', determine how to detect encoding of
1404 text that includes null bytes and ISO-2022 escape sequences,
1405 respectively. Each of these attributes can be either nil, zero, or
1406 t. If it is t, decoding text ignores null bytes and, respectively,
1407 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1408 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1409 text is encoded in one of the ISO-2022 encodings, such as
1410 iso-2022-7bit. If the value is zero, Emacs consults the variables
1411 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1413 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1414 UTF-8 encoding and decoding, whenever possible.
1416 These attributes are only meaningful for coding-systems of type
1417 `undecided'. (The type of a coding-system is determined by its
1418 `:coding-type' attribute and can be accessed by calling the
1419 `coding-system-type' function.)
1422 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1425 ** New functions `group-gid' and `group-real-gid'.
1428 ** The spelling of the rx.el category `chinese-two-byte' has been
1429 corrected (the first 'e' was missing).
1432 ** Minor internal changes to the details of lock files.
1433 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1434 If DIR/.#FILE already exists and is not an Emacs lock file,
1435 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1436 numbered lock files DIR/.#FILE.0...).
1437 On file systems that do not support symbolic links, the lock is now a
1438 regular file with contents being what would have been in the symlink.
1440 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1443 *** The package descriptor and name of global variables, constants,
1444 and functions should be separated by two hyphens if the symbol is not
1445 meant to be used by other packages.
1448 * Changes in Emacs 24.4 on Non-Free Operating Systems
1451 ** The procedure for building Emacs on MS-Windows has changed.
1452 It is now built by running the same configure script as on all other
1453 platforms. This requires the MSYS environment and MinGW development
1454 tools. See the updated instructions in nt/INSTALL for details.
1456 Using the Posix configure script and Makefile's also means a change in
1457 the directory structure of the Emacs installation on Windows. It is
1458 now the same as on GNU and Unix systems. In particular, the auxiliary
1459 programs, such as cmdproxy.exe and hexl.exe, are in
1460 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1461 version), version-independent site-lisp is in share/emacs/site-lisp,
1462 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1463 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1464 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1465 directories and will find the files in there automatically; there's no
1466 need to set any variables due to this change.)
1469 ** Emacs on Windows 2000 and later can now access files and directories
1470 whose names cannot be encoded in the current system codepage.
1472 The new variable `w32-unicode-filenames' controls this feature: if it
1473 is t, Emacs uses Unicode APIs to pass file names to system calls,
1474 which lifts the limitation of file names to the current locale.
1477 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1478 The backtrace is written to the 'emacs_backtrace.txt' file in the
1479 directory where Emacs was running.
1482 ** The variable `buffer-file-type' is no longer supported.
1483 Setting it has no effect, and %t in the mode-line format is ignored.
1484 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1485 modifying it has no effect.
1488 ** Lock files now work on MS-Windows.
1489 This helps to prevent losing your edits if the same file is being
1490 edited in another Emacs session or by another user. See the node
1491 "Interlocking" in the Emacs User Manual for the details. To disable
1492 file locking, customize `create-lockfiles' to nil.
1494 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1495 GNUstep and Mac OS X 10.4 use the old font backend.
1496 To use the old backend by default, do on the command line:
1497 % defaults write org.gnu.Emacs FontBackend ns
1499 ** Improved fullscreen support on Mac OS X.
1500 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1501 Customize `ns-use-native-fullscreen' to change the style.
1502 For Mac OS X 10.7 and newer, native is the default.
1504 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1505 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1506 does not apply to images.
1509 * Installation Changes in Emacs 24.3
1511 ** The default X toolkit is now Gtk+ version 3.
1512 If you don't pass `--with-x-toolkit' to configure, or if you use
1513 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1514 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1515 You can explicitly require a specific version by passing
1516 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1518 ** New configure option `--enable-link-time-optimization', to utilize
1519 an appropriate feature provided by GCC since version 4.5.0.
1521 ** New configure option `--without-all' to disable most of the optional
1522 features (image support, etc.) that are normally enabled by default.
1524 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1525 Emacs). If building with GCC, this enables compile-time checks that
1526 warn/give errors about possibly-questionable C code. On a recent GNU
1527 system there should be no warnings; on older and on non-GNU systems
1528 the results may be useful to developers.
1530 ** The configure option `--enable-use-lisp-union-type' has been
1531 renamed to `--enable-check-lisp-object-type', as the resulting
1532 Lisp_Object type no longer uses a union to implement the compile time
1533 check that this option enables.
1535 ** The configure option `--disable-maintainer-mode' has been removed,
1536 as it was confusingly-named and rarely useful.
1538 ** The configure options `--program-prefix', `--program-suffix', and
1539 `--program-transform-name' apply to more than just the installed
1540 binaries. Now they also affect the man pages, icons, and the
1541 etc/emacs.desktop file; but not the info pages, since this would break
1542 links between the various manuals.
1544 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1545 overwriting "emacs" in the installation bin/ directory with a link
1548 ** Emacs uses libtinfo in preference to libncurses, if available.
1550 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1551 /usr/pkg/lib to the linker search path. You must add them yourself if
1554 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1555 (from the bin and libexec directories, respectively). The former is
1556 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1559 * Startup Changes in Emacs 24.3
1561 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1562 lisp/ directory. There should not be any there anyway. If you have
1563 been adding them there, put them somewhere else; e.g., site-lisp.
1565 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1568 * Changes in Emacs 24.3
1572 *** `C-h f' (`describe-function') can now perform autoloading.
1573 When this command is called for an autoloaded function whose docstring
1574 contains a key substitution construct, that function's library is
1575 automatically loaded, so that the documentation can be shown
1576 correctly. To disable this, set `help-enable-auto-load' to nil.
1578 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1579 even after their associated libraries have been loaded (and the
1580 autoloads have been redefined as functions).
1584 *** Images displayed via ImageMagick now support transparency and the
1585 :background image specification property.
1587 *** When available, ImageMagick support is automatically enabled.
1588 It is no longer necessary to call `imagemagick-register-types'
1589 explicitly to install ImageMagick image types; that function is called
1590 automatically at startup, or when customizing an imagemagick- option.
1592 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1593 ImageMagick to view images. (You must call `imagemagick-register-types'
1594 afterwards if you do not use customize to change this.)
1596 *** The new variable `imagemagick-enabled-types' also affects which
1597 ImageMagick types are treated as images. The function
1598 `imagemagick-filter-types' returns the list of types that will be
1603 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1604 next and previous path separator, respectively.
1606 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1607 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1608 non-nil before enabling the mode.
1612 *** New option `mode-line-default-help-echo' specifies the help text
1613 (shown in a tooltip or in the echo area) for any part of the mode line
1614 that does not have its own specialized help text.
1616 *** You can now click mouse-3 in the coding system indicator to invoke
1617 `set-buffer-file-coding-system'.
1619 ** Server and client
1621 *** emacsclient now obeys string values for `initial-buffer-choice',
1622 if it is told to open a new frame without specifying any file to visit
1623 or expression to evaluate.
1625 *** New option `server-auth-key' specifies a shared server key.
1627 ** Emacs now generates backtraces on fatal errors.
1628 On encountering a fatal error, Emacs now outputs a textual description
1629 of the fatal signal, and a short backtrace on platforms like glibc
1630 that support backtraces.
1632 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1633 This minor mode replaces `toggle-read-only', which is now obsolete.
1635 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1636 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1637 respectively, without exiting from the prompt.
1639 ** In the Package Menu, newly-available packages are listed as "new",
1640 and sorted above the other "available" packages by default.
1642 ** If your Emacs was built from a repository checkout, the new variable
1643 `emacs-bzr-version' contains information about the bzr revision used.
1645 ** New option `create-lockfiles' specifies usage of lockfiles.
1646 It defaults to t. Changing it to nil inhibits the creation of lock
1647 files (use this with caution).
1649 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1650 variables on remote hosts.
1652 ** The entry for PCL-CVS has been removed from the Tools menu.
1653 The PCL-CVS commands are still available via the keyboard.
1655 ** Using "unibyte: t" in Lisp source files is obsolete.
1656 Use "coding: raw-text" instead.
1658 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1659 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1660 The previous binding, introduced in Emacs 24.1, was a mistake, because
1661 `C-c LETTER' bindings are reserved for user customizations.
1663 ** Internationalization
1665 *** New language environment: Persian.
1667 *** New input method `vietnamese-vni'.
1669 ** Nextstep (GNUstep / Mac OS X) port
1671 *** Support for fullscreen and the frame parameter fullscreen.
1673 *** A file dialog is used for open/save operations initiated from the
1677 * Editing Changes in Emacs 24.3
1679 ** Search and Replace
1681 *** Non-regexp Isearch now performs "lax" space matching.
1682 Each sequence of spaces in the supplied search string may match any
1683 sequence of one or more whitespace characters, as specified by the
1684 variable `search-whitespace-regexp'. (This variable is also used by a
1685 similar existing feature for regexp Isearch.)
1687 *** New Isearch command `M-s SPC' toggles lax space matching.
1688 This applies to both ordinary and regexp Isearch.
1690 *** New option `replace-lax-whitespace'.
1691 If non-nil, `query-replace' uses flexible whitespace matching too.
1694 *** Global `M-s _' starts a symbol (identifier) incremental search,
1695 and `M-s _' in Isearch toggles symbol search mode.
1696 `M-s c' in Isearch toggles search case-sensitivity.
1698 ** Navigation commands
1700 *** New binding `M-g c' for `goto-char'.
1702 *** New binding `M-g TAB' for `move-to-column'.
1704 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1705 interactively with no prefix arg. Previously, it moved to column 1.
1707 ** New option `yank-handled-properties' allows processing of text
1708 properties on yanked text, in ways that are more general than just
1709 removing them (as is done by `yank-excluded-properties').
1711 ** New option `delete-trailing-lines' specifies whether
1712 M-x delete-trailing-whitespace should delete trailing lines at the end
1713 of the buffer. It defaults to t.
1715 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1717 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1718 `ucs-insert' is now an obsolete alias for `insert-char'.
1720 ** The `z' key no longer has a binding in most special modes.
1721 It used to be bound to `kill-this-buffer', but `z' is too easy to
1724 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1725 It copies the region-rectangle as the last rectangle kill.
1729 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1731 *** New option `register-separator' specifies the register containing
1732 the text to put between collected texts for use with
1733 M-x append-to-register and M-x prepend-to-register.
1736 * Changes in Specialized Modes and Packages in Emacs 24.3
1738 ** Common Lisp emulation (CL)
1740 *** CL's main entry is now (require 'cl-lib).
1741 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1742 i.e., all its definitions have the "cl-" prefix (and internal definitions
1743 use the "cl--" prefix).
1745 If `cl' provided a feature under the name `foo', then `cl-lib'
1746 provides it under the name `cl-foo' instead; with the exceptions of the
1747 few `cl' definitions that had to use `foo*' to avoid conflicts with
1748 pre-existing Elisp entities. These have been renamed to `cl-foo'
1749 rather than `cl-foo*'.
1751 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1752 provide the old, non-prefixed names. Some exceptions are listed below:
1754 *** `cl-flet' is not like `flet' (which is deprecated).
1755 Instead it obeys the behavior of Common-Lisp's `flet'.
1756 In particular, in cl-flet function definitions are lexically scoped,
1757 whereas in flet the scoping is dynamic.
1759 *** `cl-labels' is slightly different from `labels'.
1760 The difference is that it relies on the `lexical-binding' machinery
1761 (as opposed to the `lexical-let' machinery used previously) to capture
1762 definitions in closures, so such closures will only work if `lexical-binding'
1765 *** `cl-letf' is not exactly like `letf'.
1766 The only difference is in details that relate to some deprecated usage
1767 of `symbol-function' in place forms.
1769 *** `progv' was rewritten to use the `let' machinery.
1770 A side effect is that variables without corresponding values are bound
1771 to nil rather than being made unbound.
1773 *** The following methods of extending `setf' are obsolete
1774 (use features from gv.el instead):
1775 `define-modify-macro' (use `gv-letplace')
1776 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1777 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1778 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1782 *** Changes are now highlighted using the same color scheme as in
1783 modern VCSes. Deletions are displayed in red (new faces
1784 `diff-refine-removed' and `smerge-refined-removed', and new definition
1785 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1786 and `smerge-refined-added', and new definition of `diff-added').
1788 *** The variable `diff-use-changed-face' defines whether to use the
1789 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1790 changes in context diffs.
1792 *** The new command `diff-delete-trailing-whitespace' removes trailing
1793 whitespace introduced by a diff.
1795 ** Ediff now uses the same color scheme as Diff mode.
1799 A new version of python.el, which provides several new features, including:
1800 per-buffer shells, better indentation, Python 3 support, and improved
1801 shell-interaction compatible with iPython (and virtually any other
1804 *** Some user options have been replaced/renamed, including (old -> new):
1805 **** python-indent -> python-indent-offset
1806 **** python-guess-indent -> python-indent-guess-indent-offset
1807 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1808 **** python-use-skeletons -> python-skeleton-autoinsert
1810 *** Some user options have been removed, including:
1812 **** `python-indent-string-contents': Strings are never indented.
1814 **** `python-honour-comment-indentation':
1815 Comments are always considered as indentation markers.
1817 **** `python-continuation-offset': Indentation is automatically
1818 calculated in a pep8 compliant way depending on the context.
1820 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1821 Have no direct mapping as the shell interaction is completely different.
1823 **** `python-python-command', `python-jython-command':
1824 Replaced by `python-shell-interpreter'.
1826 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1827 `python-pdbtrack-minor-mode-string', `python-source-modes':
1830 *** Some commands have been replaced (old -> new):
1831 **** python-insert-class -> python-skeleton-class
1832 **** python-insert-def -> python-skeleton-def
1833 **** python-insert-for -> python-skeleton-for
1834 **** python-insert-if -> python-skeleton-if
1835 **** python-insert-try/except -> python-skeleton-try
1836 **** python-insert-try/finally -> python-skeleton-try
1837 **** python-insert-while -> python-skeleton-while
1838 **** python-find-function -> python-nav-jump-to-defun
1839 **** python-next-statement -> python-nav-forward-sentence
1840 **** python-previous-statement -> python-nav-backward-sentence
1841 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1842 **** python-end-of-defun-function -> python-nav-end-of-defun
1843 **** python-send-buffer -> python-shell-send-buffer
1844 **** python-send-defun -> python-shell-send-defun
1845 **** python-send-region -> python-shell-send-region
1846 **** python-send-region-and-go -> emulate with python-shell-send-region
1847 and python-shell-switch-to-shell
1848 **** python-send-string -> python-shell-send-string
1849 **** python-switch-to-python -> python-shell-switch-to-shell
1850 **** python-describe-symbol -> python-eldoc-at-point
1854 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1856 *** The D-Bus object manager interface is implemented.
1858 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1859 if their value does not fit into Emacs's integer range.
1861 *** The function `dbus-call-method' is now non-blocking.
1862 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1864 *** Signals can also be sent as unicast messages.
1866 *** The argument list of `dbus-register-signal' has been extended,
1867 according to the new match rule types of D-Bus.
1869 *** `dbus-init-bus' supports private connections.
1871 *** There is a new function `dbus-setenv'.
1873 ** `desktop-path' no longer includes the "." directory.
1874 Desktop files are now located in ~/.emacs.d by default.
1878 *** `dired-do-async-shell-command' executes each file sequentially
1879 if the command ends in `;' (when operating on multiple files).
1880 Otherwise, it executes the command on each file in parallel.
1882 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1883 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1886 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1887 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1888 mark/unmark/flag all files in the active region.
1890 *** The minibuffer default for `=' (`dired-diff') has changed.
1891 It is now the backup file for the file at point, if one exists.
1892 In Transient Mark mode the default is the file at the active mark.
1894 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1895 The global binding for `M-=', `count-words-region' is in effect.
1899 *** New module "notifications", which can send a notification when you
1900 receive a private message or your nickname is mentioned.
1902 *** ERC will look up server/channel names via auth-source and use any
1905 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1906 only applies to messages sent by lurkers.
1908 ** reStructuredText mode
1910 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1911 fontification, comment handling, and customization have all been revised
1914 *** Support for `imenu' and `which-function-mode'.
1916 *** The reStructuredText syntax is more closely covered.
1917 Sphinx support has been improved.
1919 *** `rst-insert-list' inserts new list or continues existing lists.
1921 *** A negative prefix argument always works for `rst-adjust'.
1923 *** The window configuration is reset after displaying a TOC.
1925 *** The constant `rst-version' describes the rst.el package version.
1929 *** Support for percent literals and recognition of regular expressions
1930 in method calls without parentheses with more methods, including Cucumber
1933 *** Improved syntax highlighting and indentation.
1935 *** New command `ruby-toggle-block', bound to `C-c {'.
1937 *** Some non-standard keybindings/commands have been removed:
1939 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1941 **** `ruby-mark-defun'; use `mark-defun'.
1943 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1944 appropriate settings for the variables `beginning-of-defun-function'
1945 and `end-of-defun-function'.
1947 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1948 `reindent-then-newline-and-indent' and `newline' have been removed.
1950 ** Shell Script mode
1952 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1954 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1956 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1960 *** The free software compiler GHDL is supported (and now the default).
1962 *** Support for the VHDL-AMS packages has been added/updated.
1964 *** Updated to the 2002 revision of the VHDL standard.
1966 *** Accepts \r and \f as whitespace.
1970 *** The faces used by Apropos are now directly customizable.
1971 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1972 see the `apropos' Custom group for details.
1974 *** The old options whose values specified faces to use have been removed
1975 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1976 `apropos-match-face' and `apropos-property-face'.).
1980 *** This package has been rewritten to use Tabulated List mode.
1982 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1983 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1987 *** Algebraic simplification mode is now the default.
1988 To restrict to the limited simplifications given by the former
1989 default simplification mode, use `m I'.
1993 *** You can customize the header text that appears above each calendar month.
1994 See the variable `calendar-month-header'.
1996 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1998 *** The calendars produced by cal-html include holidays.
1999 Customize `cal-html-holidays' to change this.
2003 *** The major modes from the parser generators "Bovine" and "Wisent"
2004 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2005 are in `auto-mode-alist', and the corresponding manuals are included.
2009 **** Menu support for the "Configuration" feature. This allows users to
2010 choose the active configuration (such as debug or install) from the menu.
2012 **** New command `ede-set' to interactively set project-local variables.
2014 **** Support for compiling, debugging, and running in "generic" projects.
2016 **** Autoconf editing support for M4 macros with complex arguments.
2018 **** Compilation support for the "linux" project type.
2020 **** "simple" projects have been removed; use "generic" projects instead.
2024 **** Support for parsing #include statements inside a namespace in C/C++.
2026 **** Improved support for 'extern "C"' declarations in C/C++.
2028 **** The ability to ignore more common special C/C++ preprocessor symbols,
2029 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2030 If available, include cdefs.h as an additional source of preprocessor symbols.
2032 **** Improved C/C++ function pointer parsing.
2034 **** In Python, support for converting imports to include file names.
2036 **** Ability to dynamically determine the Python load path.
2038 **** Support for the Python 'WITH' and 'AT' keywords.
2040 **** Improved tooltip completion.
2044 **** The SRecode manual is now included.
2046 **** Tag generation supports constructor/destructor settings and system
2047 include differentiation.
2049 **** Addition of 'Framework' support: Frameworks are specified when a
2050 particular kind of library (such as Android) is needed in a common language
2053 **** Support for nested templates and let variables override based on priority.
2055 **** Support for merging tables from multiple related modes, such as
2056 default -> c++ -> arduino.
2058 ** Compile has a new option `compilation-always-kill'.
2062 *** `custom-reset-button-menu' now defaults to t.
2064 *** Non-option variables are never matched in `customize-apropos' and
2065 `customize-apropos-options' (i.e., the prefix argument does nothing for
2066 these commands now).
2070 *** The variables `term-default-fg-color' and `term-default-bg-color'
2071 are now deprecated in favor of the customizable face `term'.
2073 *** You can customize how to display ANSI terminal colors and styles
2074 by customizing the corresponding `term-color-<COLOR>',
2075 `term-color-underline' and `term-color-bold' faces.
2079 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2081 *** Remote processes are now also supported on remote MS-Windows hosts.
2085 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2086 Previously, this slot stored semicolon-separated attribute-value pairs
2087 appended to some imap URLs, but this is not compatible with RFC 3986.
2088 So now the `filename' slot stores the entire path and query components,
2089 and the `attributes' slot is always nil.
2091 *** New function `url-encode-url' for encoding a URI string.
2092 The `url-retrieve' function now uses this to encode its URL argument,
2093 in case that is not properly encoded.
2095 ** notifications.el supports now version 1.2 of the Notifications API.
2096 The function `notifications-get-capabilities' returns the supported
2099 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2100 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2101 `flymake-warning-bitmap'.
2103 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2104 specifying URL types that should be converted to remote file names at
2105 the FFAP prompt. The default is now '("ftp").
2107 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2108 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2110 ** New option `mouse-avoidance-banish-position' specifies where the
2111 `banish' mouse avoidance setting moves the mouse.
2113 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2114 closing brackets to be aligned with the line of the opening bracket.
2116 ** In Proced mode, new command `proced-renice' renices marked processes.
2118 ** New option `async-shell-command-buffer' specifies the buffer to use
2119 for a new asynchronous `shell-command' when the default output buffer
2120 `*Async Shell Command*' is already in use.
2122 ** SQL mode has a new option `sql-db2-escape-newlines'.
2123 If non-nil, newlines sent to the command interpreter will be escaped
2124 by a backslash. The default does not escape the newlines and assumes
2125 that the sql statement will be terminated by a semicolon.
2127 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2128 (and modes that derive from it), sorts the column at point, or the Nth
2129 column if a numeric prefix argument is given.
2131 ** `which-func-modes' now defaults to t, so Which Function mode, when
2132 enabled, applies to all applicable major modes.
2134 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2137 ** Follow mode no longer works by using advice.
2138 The option `follow-intercept-processes' has been removed.
2140 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2142 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2143 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2144 *** semantic-change-hooks -> semantic-change-functions
2145 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2146 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2147 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2148 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2149 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2150 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2151 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2152 *** rcirc-activity-hooks -> rcirc-activity-functions
2153 *** rcirc-print-hooks -> rcirc-print-functions
2154 *** dbus-event-error-hooks -> dbus-event-error-functions
2155 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2156 *** checkdoc-style-hooks -> checkdoc-style-functions
2157 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2158 *** archive-extract-hooks -> archive-extract-hook
2159 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2160 *** hfy-post-html-hooks -> hfy-post-html-hook
2161 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2162 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2163 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2164 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2166 ** Obsolete packages
2169 In most cases, assoc+member+push+delq work just as well.
2170 And in any case it's just a terrible package: ugly semantics, terrible
2171 inefficiency, and not namespace-clean.
2180 * Incompatible Lisp Changes in Emacs 24.3
2182 ** Docstrings starting with `*' no longer indicate user options.
2183 Only variables defined using `defcustom' are considered user options.
2184 The function `user-variable-p' is now an obsolete alias for
2185 `custom-variable-p'.
2187 ** The return values of `defalias', `defun' and `defmacro' have changed,
2188 and are now undefined. For backwards compatibility, `defun' and
2189 `defmacro' currently return the name of the newly defined
2190 function/macro, but this should not be relied upon.
2192 ** `random' by default now returns a different random sequence in
2193 every Emacs run. Use `(random S)', where S is a string, to set the
2194 random seed to a value based on S, in order to get a repeatable
2195 sequence in later calls.
2197 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2198 that substring is inserted literally even if the LITERAL arg is
2199 non-nil, instead of causing an error to be signaled.
2201 ** `select-window' now always makes the window's buffer current.
2202 It does so even if the window was selected before.
2204 ** The function `x-select-font' can return a font spec, instead of a
2205 font name as a string. Whether it returns a font spec or a font name
2206 depends on the graphical library.
2208 ** `face-spec-set' no longer sets frame-specific attributes when the
2209 third argument is a frame (that usage was obsolete since Emacs 22.2).
2211 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2213 ** The CL package's `get-setf-method' function no longer exists.
2214 Generalized variables are now part of core Emacs Lisp, and implemented
2215 differently to the way cl.el used to do it. It is not possible to
2216 define a compatible replacement for `get-setf-method'. See the file
2217 gv.el for internal details of the new implementation.
2219 ** The arguments of `dbus-register-signal' are no longer just strings,
2220 but keywords or keyword-string pairs. The old argument list will
2221 still be supported for Emacs 24.x.
2223 ** Miscellaneous name changes
2224 Some Lisp symbols have been renamed to correct their spelling,
2225 or to be more consistent with standard Emacs terminology.
2227 *** Renamed functions
2228 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2229 **** inactivate-input-method -> deactivate-input-method
2230 **** quail-inactivate -> quail-deactivate
2231 **** robin-inactivate -> robin-deactivate
2232 **** viper-inactivate-input-method -> viper-deactivate-input-method
2233 **** viper-inactivate-input-method-action ->
2234 viper-deactivate-input-method-action
2235 **** ucs-input-inactivate -> ucs-input-deactivate
2238 The old hooks are still supported for backward compatibility, but they
2239 are deprecated and will be removed eventually.
2240 **** input-method-inactivate-hook -> input-method-deactivate-hook
2241 **** robin-inactivate-hook -> robin-deactivate-hook
2242 **** quail-inactivate-hook -> quail-deactivate-hook
2244 *** Renamed variables
2245 **** follow-deactive-menu -> follow-inactive-menu
2246 **** inactivate-current-input-method-function ->
2247 deactivate-current-input-method-function
2249 ** Some obsolete functions, variables, and faces have been removed:
2250 *** `last-input-char', `last-command-char', `unread-command-char'
2251 *** `facemenu-unlisted-faces'
2252 *** `rmail-decode-mime-charset'
2253 *** `iswitchb-read-buffer'
2254 *** `sc-version', `sc-submit-bug-report'
2255 *** `set-char-table-default'
2256 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2257 *** `compile-internal'
2259 *** `mode-line-inverse-video'
2260 *** `follow-mode-off-hook'
2261 *** `cvs-commit-buffer-require-final-newline'
2262 (use `log-edit-require-final-newline' instead)
2263 *** `cvs-changelog-full-paragraphs'
2264 (use `log-edit-changelog-full-paragraphs' instead)
2265 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2266 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2267 *** `vc-master-templates' (use `vc-handled-backends' instead)
2268 *** `vc-checkout-carefully'
2271 * Lisp Changes in Emacs 24.3
2273 ** CL-style generalized variables are now in core Elisp.
2274 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2275 You can define your own generalized variables using `gv-define-simple-setter',
2276 `gv-define-setter', etc.
2278 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2279 This can significantly speed up execution of non-byte-compiled code,
2280 but can also bump into previously unnoticed cyclic dependencies.
2281 These are generally harmless: they will simply cause the macro calls
2282 to be left for later expansion (as before), but will result in a
2283 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2284 You may wish to restructure your code so this does not happen.
2286 ** New sampling-based Elisp profiler.
2287 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2288 When finished, use M-x profiler-stop. The sampling rate can be based on
2289 CPU time or memory allocations.
2291 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2292 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2294 ** New macros `setq-local' and `defvar-local'.
2296 ** Face underlining can now use a wave.
2298 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2299 of `read-regexp' accepts a string ending with a colon and space, and its
2300 second argument DEFAULTS can be a list of strings accessible via `M-n'
2301 in the minibuffer ahead of other hard-coded useful regexp-related values.
2302 More commands use `read-regexp' now to read their regexp arguments.
2306 *** New function `completion-table-with-quoting' to handle completion
2307 in the presence of quoting, such as file completion in shell buffers.
2309 *** New function `completion-table-subvert' to use an existing completion
2310 table, but with a different prefix.
2314 *** New error type and new function `user-error'.
2315 These do not trigger the debugger.
2317 *** New option `debugger-bury-or-kill', saying what to do with the
2318 debugger buffer when exiting debug.
2320 *** Set `debug-on-message' to enter the debugger when a certain
2321 message is displayed in the echo area. This can be useful when trying
2322 to work out which code is doing something.
2324 *** New var `inhibit-debugger', automatically set to prevent accidental
2325 recursive invocations.
2329 *** New command `fit-frame-to-buffer' adjusts the frame height to
2332 *** The command `fit-window-to-buffer' can adjust the frame height
2333 if the new option `fit-frame-to-buffer' is non-nil.
2335 *** New macro `with-temp-buffer-window', similar to
2336 `with-output-to-temp-buffer'.
2338 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2341 *** New option `switch-to-buffer-preserve-window-point' to restore a
2342 window's point when switching buffers.
2344 *** New display action alist entries `window-height' and `window-width'
2345 specify the size of new windows created by `display-buffer'.
2347 *** New display action alist entry `pop-up-frame-parameters', if
2348 non-nil, specifies frame parameters to give any newly-created frame.
2350 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2351 tells display action functions to avoid changing which frame is
2354 *** New display action alist entry `previous-window', if non-nil,
2355 specifies window to reuse in `display-buffer-in-previous-window'.
2357 *** New display action functions `display-buffer-below-selected',
2358 and `display-buffer-in-previous-window'.
2360 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2361 now accept a third argument to avoid choosing the selected window.
2363 *** Additional values recognized for option `window-combination-limit'.
2365 *** The following variables are obsolete, as they can be replaced by
2366 appropriate entries in the `display-buffer-alist' function introduced
2368 **** `dired-shrink-to-fit'
2369 **** `display-buffer-reuse-frames'
2370 **** `display-buffer-function'
2371 **** `special-display-buffer-names'
2372 **** `special-display-frame-alist'
2373 **** `special-display-function'
2374 **** `special-display-regexps'
2378 *** `current-time-string' no longer requires that its argument's year
2379 must be in the range 1000..9999. It now works with any year supported
2380 by the underlying C implementation.
2382 *** `current-time' now returns extended-format time stamps
2383 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2384 PSEC is typically a multiple of 1000 on current machines. Other
2385 functions that use this format, such as `file-attributes' and
2386 `format-time-string', have been changed accordingly. Old-format time
2387 stamps are still accepted.
2389 *** The format of timers in `timer-list' and `timer-idle-list' is now
2390 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2391 The PSECS slot is new, and uses picosecond resolution. It can be
2392 accessed via the new `timer--psecs' accessor.
2394 *** Last-modified time stamps in undo lists now are of the form
2395 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2399 *** Improved security when handling persistent objects:
2401 **** `eieio-persistent-read' now features optional arguments for specifying
2402 the class to load, as well as a flag stating whether subclasses are allowed;
2403 if provided, other classes will be rejected by the reader. For
2404 compatibility with existing code, if the class is omitted only a
2407 **** New specialized reader for pulling in classes and signaling errors
2408 without evaluation of suspicious code.
2410 **** All slots that contain objects must have a :type. Slots with lists
2411 of objects must use a new type predicate for a list of an object type.
2413 *** Support for `find-function' and similar utilities, through the addition
2414 of filename support to generated symbols.
2416 ** Floating point functions now always return special values like NaN,
2417 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2418 Previously, they returned NaNs on some platforms but signaled errors
2419 on others. The affected functions are acos, asin, tan, exp, expt,
2420 log, log10, sqrt, and mod.
2422 ** New fringe bitmap `exclamation-mark'.
2424 ** Miscellaneous changes to special forms and macros
2426 *** `defun' and `defmacro' are now macros rather than special forms.
2428 *** `kbd' is now a function rather than a macro.
2430 ** Miscellaneous new functions
2432 *** `set-temporary-overlay-map' sets up a temporary keymap that
2433 takes precedence over most other maps for a short while (normally one key).
2435 *** `autoloadp' tests if its argument is an autoloaded object.
2437 *** `autoload-do-load' performs the autoloading operation.
2439 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2441 *** `file-name-base' returns a file name sans directory and extension.
2443 *** `function-get' fetches a function property, following aliases.
2445 *** `posnp' tests if an object is a `posn'.
2447 *** `system-users' returns the user names on the system.
2449 *** `system-groups' returns the group names on the system.
2451 *** `tty-top-frame' returns the topmost frame of a text terminal.
2453 ** The following functions and variables are obsolete:
2454 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2455 *** `buffer-has-markers-at'
2456 *** `macro-declaration-function' (use `macro-declarations-alist')
2457 *** `window-system-version' (provides no useful information)
2458 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2459 *** `query-replace-interactive'
2460 *** `font-list-limit' (has had no effect since Emacs < 23)
2463 * Changes in Emacs 24.3 on Non-Free Operating Systems
2465 ** Cygwin builds can use the native MS Windows user interface.
2466 Pass `--with-w32' to configure. The default remains the X11 interface.
2468 ** Two new functions are available in Cygwin builds:
2469 `cygwin-convert-file-name-from-windows' and
2470 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2471 code to access the Cygwin file-name mapping machinery to convert
2472 between Cygwin and Windows-native file and directory names.
2474 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2475 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2476 `mouse-autoselect-window'.
2478 ** On MS Windows Vista and later Emacs now supports symbolic links.
2480 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2481 support for libxml2, even if its presence is detected.
2483 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2485 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2486 directories to the search path. You must add them yourself if you want them.
2489 * Changes in Emacs 24.2
2491 ** This is mainly a bug-fix release.
2494 * Installation Changes in Emacs 24.1
2496 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2497 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2498 also depend on Gtk+. You can disable them with --without-rsvg and
2501 ** Emacs can be compiled with GnuTLS support.
2502 This happens by default if a suitably recent version of the library is
2503 found at build time. To prevent this, use the configure option
2504 `--without-gnutls'. See below for GnuTLS features.
2506 ** Emacs can be compiled with SELinux support.
2507 This happens by default if a suitably recent version of the library is
2508 found at build time. To prevent this, use the configure option
2509 `--without-selinux'. See below for SELinux features.
2511 ** Emacs can be compiled with ImageMagick support.
2512 This happens by default if a suitably recent version of the library is
2513 found at build time. To prevent this, use the configure option
2514 `--without-imagemagick'. See below for ImageMagick features.
2515 This feature is not available for the Nextstep or MS ports.
2517 ** Emacs can be compiled with libxml2 support.
2518 This happens by default if a suitably recent version of the library is
2519 found at build time. To prevent this, use the configure option
2520 `--without-xml2'. See below for libxml2 features.
2522 ** By default, the installed Info and man pages are compressed.
2523 You can disable this by configuring --without-compress-info.
2525 ** New configure option --with-wide-int.
2526 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2527 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2530 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2531 These provide no new functionality, they just remove the need to edit
2532 lib-src/Makefile by hand in order to use the associated features.
2534 ** New configure option --enable-use-lisp-union-type.
2535 This is only useful for Emacs developers to debug certain types of bugs.
2536 This is not a new feature; only the configure flag is new.
2538 ** The standalone programs digest-doc and sorted-doc are removed.
2539 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2541 ** The standalone program `fakemail' is removed.
2542 If you need it, feedmail.el provides a superset of the functionality.
2545 * Startup Changes in Emacs 24.1
2547 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2548 command line arguments, and the EMACS_UNIBYTE environment variable, no
2549 longer have any effect. (They were declared obsolete in Emacs 23.)
2551 ** New command line option `--no-site-lisp' removes site-lisp directories
2552 from load-path. -Q now implies this. This option does not affect the
2553 EMACSLOADPATH environment variable (and hence has no effect for
2557 * Changes in Emacs 24.1
2561 *** Many packages now use the `completion-at-point' command,
2562 rather than implementing separate completion commands.
2564 *** `completion-at-point' now handles tags and semantic completion.
2566 *** Completion in a non-minibuffer now tries to detect the end of completion
2567 and pops down the *Completions* buffer accordingly.
2569 *** New option `completion-cycle-threshold' allows completion cycling.
2571 *** New option `completion-category-overrides' for overriding the
2572 default completion style in certain circumstances.
2574 *** New completion style `substring'.
2576 *** Completion of buffer names uses `substring' completion by default.
2578 *** The option `widget-complete-field' has been removed.
2582 *** The first time you try sending mail, Emacs asks for a mail method.
2583 This is implemented by a new default for `send-mail-function', which
2584 is `sendmail-query-once'. This offers to use the smtpmail package, or
2585 to use the old defaults relying on external mail facilities
2586 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2587 `mailclient-send-it' on Windows).
2589 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2590 transfers the report to your desktop's preferred mail client, if there
2591 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2594 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2595 and Mail mode changes
2597 ** Emacs server and client changes
2599 *** New option `server-port' specifies the port for TCP Emacs servers.
2601 *** New emacsclient argument -q/--quiet suppresses some status messages.
2603 *** New emacsclient argument --frame-parameters specifies the frame
2604 parameters of any newly-created graphical frame.
2606 *** If emacsclient shuts down due to Emacs signaling an error,
2607 its exit status is 1.
2609 *** New emacsclient argument --parent-id ID.
2610 This opens a client frame in parent X window ID, via XEmbed, similar
2611 to the --parent-id argument to Emacs.
2613 ** Internationalization changes
2615 *** Emacs now supports display and editing of bidirectional text.
2616 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2617 displayed in the correct visual order as expected by users of those
2618 scripts. The display reordering is a "full bidirectionality" class
2619 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2620 with no RTL text should look exactly the same as before.
2622 **** New buffer-local variable `bidi-display-reordering'.
2623 To disable display reordering in a buffer, change this to nil.
2625 **** New buffer-local variable `bidi-paragraph-direction'.
2626 If nil (the default), Emacs determines the base direction of each
2627 paragraph from its text, as specified by the UBA. Setting the value
2628 to `right-to-left' or `left-to-right' forces a base direction on each
2631 Paragraphs with right-to-left base direction are displayed starting at
2632 the right window edge.
2634 *** Enhanced support for characters with no glyphs in available fonts,
2635 or, on text terminals, characters that cannot be encoded by the
2636 terminal coding system. The new option `glyphless-char-display-control'
2637 specifies how to display them: as a hexadecimal code in a box, a thin
2638 1-pixel space, an empty box, etc.
2640 *** New input methods for Farsi and Bulgarian
2641 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2643 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2644 (U+2010 and U+2011).
2646 *** New Hebrew translation of the Emacs Tutorial.
2647 Type `C-u C-h t' to choose it in case your language setup doesn't
2648 automatically select it.
2650 ** An Emacs Lisp package manager is now included.
2651 This is a convenient way to download and install additional packages,
2652 from a package repository at http://elpa.gnu.org.
2654 *** M-x list-packages shows a list of packages, which can be
2655 selected for installation.
2657 *** New command `describe-package', bound to `C-h P'.
2659 *** By default, all installed packages are loaded automatically when
2660 Emacs starts up. To disable this, set `package-enable-at-startup' to
2661 nil. To specify the packages to load, customize `package-load-list'.
2663 ** Custom theme changes
2665 *** New command `M-x customize-themes', which provides a convenient
2666 interface for enabling and disabling Custom themes.
2668 *** New option `custom-theme-load-path' is the load path for themes.
2669 Emacs no longer looks for Custom themes in `load-path'. The default
2670 value of `custom-theme-load-path' says to look for themes in
2671 `custom-theme-directory', followed by a subdirectory of
2672 `data-directory' named "themes/", which contains a small selection of
2673 built-in Custom themes.
2675 *** New option `custom-safe-themes' records known-safe theme files.
2676 If a theme is not in this list, Emacs queries before loading it, and
2677 offers to save the theme to `custom-safe-themes' automatically. By
2678 default, all themes included in Emacs are treated as safe.
2680 ** Improved GTK integration
2682 *** GTK scroll-bars are now placed on the right by default.
2683 The function `set-scroll-bar-mode' can change this.
2685 *** GTK tool bars can have just text, just images or images and text.
2686 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2687 the default is taken from desktop settings.
2689 *** GTK tool bars can be placed on any edge of the frame.
2690 The frame-parameter tool-bar-position controls this. It takes the
2691 values top, left, right or bottom. The Options => Show/Hide menu has
2694 *** The default colors for selected text (the `region' face) are taken
2695 from the GTK theme when Emacs is built with GTK.
2697 *** Emacs uses GTK tooltips by default if built with GTK.
2698 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2700 ** Graphical interface changes
2702 *** On graphical displays, the mode-line no longer ends in dashes.
2703 Also, the first dash (which does not indicate anything) is just
2704 displayed as a space.
2706 *** `menu-bar-select-buffer-function' lets you choose another operation
2707 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2709 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2710 built with Xft. These fonts can be set via X resources, for example:
2711 Emacs.pane.menubar.font: Courier-12
2715 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2716 or if it receives a SIGINT signal in batch mode.
2718 *** `kill-emacs-hook' is now also run in batch mode.
2719 Third-party code which adds to `kill-emacs-hook' should check if they
2720 do the right thing in batch mode.
2722 ** Scrolling changes
2724 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2725 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2726 of buffer at first key-press (instead they move to top/bottom of buffer)
2727 when `scroll-error-top-bottom' is non-nil.
2729 *** New option `scroll-error-top-bottom' (see above).
2731 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2732 scroll a line instead of full screen.
2734 *** New property `scroll-command' should be set on a command's symbol to
2735 define it as a scroll command affected by `scroll-preserve-screen-position'.
2737 *** If you customize `scroll-conservatively' to a value greater than 100,
2738 Emacs will never recenter point in the window when it scrolls due to
2739 cursor motion commands or commands that move point (e.f., `M-g M-g').
2740 Previously, you needed to use `most-positive-fixnum' as the value of
2741 `scroll-conservatively' to achieve the same effect.
2743 *** "Aggressive" scrolling now honors the scroll margins.
2744 If you customize `scroll-up-aggressively' or
2745 `scroll-down-aggressively' and move point off the window, Emacs now
2746 scrolls the window so as to avoid positioning point inside the scroll
2749 ** Basic SELinux support has been added.
2750 This requires Emacs to be linked with libselinux at build time.
2752 *** Emacs preserves the SELinux file context when backing up.
2753 Also, the function `copy-file' has an extra optional argument for
2754 preserving SELinux context, and the return value of `backup-buffer'
2755 now includes the SELinux context.
2757 *** New functions `file-selinux-context' and `set-file-selinux-context'
2758 get and set the SELinux context of a file.
2762 *** `delete-by-moving-to-trash' now only affects commands that specify
2763 trashing. This avoids inadvertently trashing temporary files.
2765 *** Calling `delete-file' or `delete-directory' with a prefix argument
2766 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2768 ** File- and directory-local variable changes
2770 *** You can stop directory local vars from applying to subdirectories.
2771 Add an element (subdirs . nil) to the alist portion of any variables
2772 settings to indicate that the section should not apply to
2775 *** Directory local variables can apply to some file-less buffers.
2776 Affected modes include dired, vc-dir, and log-edit. For example,
2777 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2778 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2779 `hack-dir-local-variables-non-file-buffer' to support this.
2781 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2782 Instead, use "eval: (minor-mode 1)".
2784 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2785 to `inhibit-local-variables-regexps'. As the name suggests, it now
2786 applies to ALL file local variables, not just -*- lines. The
2787 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2792 *** The `quit-window' command now restores the last buffer displayed
2793 in the quitted window.
2795 *** Resizing an Emacs frame now preserves proportional window sizes,
2796 modulo restrictions like window minimum sizes and fixed-size windows.
2798 *** The behavior of `display-buffer' is now customizable in detail.
2800 **** New option `display-buffer-base-action' specifies a list of
2801 user-determined display "actions" (functions and optional arguments
2802 for choosing the displaying window).
2804 This takes precedence over the default display action, which is
2805 specified by `display-buffer-fallback-action'.
2807 **** New option `display-buffer-alist' maps buffer name regexps to
2808 display actions, taking precedence over `display-buffer-base-action'.
2810 *** New option `window-combination-limit'.
2811 The new option `window-combination-limit' allows to return the space
2812 obtained for resizing or creating a window more reliably to the window
2813 from which such space was obtained.
2815 *** New option `window-combination-resize'.
2816 The new option `window-combination-resize' allows to split a window that
2817 otherwise cannot be split because it's too small by stealing space from
2818 other windows in the same combination. Subsequent resizing or deletion
2819 of the window will resize all windows in the same combination as well.
2821 *** New option `frame-auto-hide-function' lets you choose between
2822 iconifying or deleting a frame when burying a buffer in a dedicated
2823 frame, or quitting a window showing a buffer in a frame of its own.
2825 *** New commands `maximize-window' and `minimize-window'.
2826 These maximize and minimize the size of a window within its frame.
2828 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2829 These functions allow to navigate through the live buffers that have
2830 been shown in a specific window.
2832 ** Minibuffer changes
2834 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2835 This is handy for minibuffer-only frames, and is also used for the feature
2836 where mouse-1 pops up *Messages*"', which can now easily be changed.
2838 *** Minibuffers set `truncate-lines' to nil.
2839 If you want to change the value to something else, you could use
2840 for example `minibuffer-setup-hook'.
2842 ** `auto-mode-case-fold' is now enabled by default.
2844 ** `backup-by-copying-when-mismatch' now defaults to t.
2846 ** New basic faces `error', `warning', `success'.
2847 These are used to highlight text indicating failure, caution or
2848 successful operation.
2850 ** New option `list-colors-sort' defines the color sort order
2851 for `list-colors-display'.
2853 ** The variable `focus-follows-mouse' now always defaults to nil.
2856 * Editing Changes in Emacs 24.1
2860 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2861 `isearch-yank-line'.
2863 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2864 `isearch-yank-kill'.
2866 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2868 ** New commands `count-words-region' and `count-words'.
2870 *** M-= is bound to `count-words-region', not `count-lines-region'.
2871 The `count-words-region' command, when called interactively, reports
2872 the number of lines, words, and characters in the region. It is a
2873 superset of the old `count-lines-region', which is now an obsolete
2876 ** The command `just-one-space' (M-SPC), if given a negative argument,
2877 also deletes newlines around point.
2881 *** New option `delete-active-region'.
2882 If non-nil, [delete] and DEL delete the region if it is active and no
2883 prefix argument is given. If set to `kill', those commands kill
2886 *** New command `delete-forward-char', bound to [delete].
2887 This is meant for interactive use, and obeys `delete-active-region'.
2888 The command `delete-char' does not obey `delete-active-region'.
2890 *** `delete-backward-char' is now a Lisp function.
2891 Apart from obeying `delete-active-region', its behavior is unchanged.
2892 However, the byte compiler now warns if it is called from Lisp; Lisp
2893 callers should use delete-char with a negative argument instead.
2895 *** The option `mouse-region-delete-keys' has been deleted.
2897 ** Selection changes.
2899 The default handling of clipboard and primary selections has been
2900 changed to conform with modern X applications. In short, most
2901 commands for killing and yanking text now use the clipboard, while
2902 mouse commands use the primary selection.
2904 In the following, we provide a list of these changes, followed by a
2905 list of steps to get the old behavior back if you prefer that.
2907 *** `select-active-regions' now defaults to t.
2908 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2909 the kill ring. The selected text is put in the primary selection, if
2910 the system possesses a separate primary selection facility (e.g. X).
2912 **** `select-active-regions' also accepts a new value, `only'.
2913 This means to only set the primary selection for temporarily active
2914 regions (usually made by mouse-dragging or shift-selection);
2915 "ordinary" active regions, such as those made with C-SPC followed by
2916 point motion, do not alter the primary selection.
2918 **** `mouse-drag-copy-region' now defaults to nil.
2920 *** mouse-2 is now bound to `mouse-yank-primary'.
2921 This pastes from the primary selection, ignoring the kill-ring.
2922 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2924 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2926 *** `x-select-enable-primary' now defaults to nil.
2927 Thus, commands that kill text or copy it to the kill-ring (such as
2928 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2930 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2931 exactly equivalent to M-w, C-w, and C-y respectively.
2933 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2934 non-nil by default, as Windows does not support the primary selection
2935 between applications.
2937 *** To return to the previous behavior, do the following:
2939 **** Change `select-active-regions' to nil.
2940 **** Change `mouse-drag-copy-region' to t.
2941 **** Change `x-select-enable-primary' to t (on X only).
2942 **** Change `x-select-enable-clipboard' to nil.
2943 **** Bind `mouse-yank-at-click' to mouse-2.
2945 *** Support for X cut buffers has been removed.
2947 *** X clipboard managers are now supported.
2948 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2950 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2951 in the current rectangle. With a prefix argument, this prompts for a
2952 number to count from and for a format string.
2954 ** `redisplay-dont-pause' now defaults to t.
2955 This makes Emacs feel more responsive to editing commands that arrive
2956 at high rate, e.g. if you lean on some key, because stopping redisplay
2957 in the middle (when this variable is nil) forces more expensive
2958 updates later on, and Emacs appears to be unable to keep up.
2960 ** The behavior of <TAB> for active regions in Text mode has changed.
2961 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2962 when the region is active causes Emacs to indent all the lines in the
2963 region, aligning them with the line previous to the first line in the
2964 region (or with the left margin if there is no previous line).
2966 ** When `occur' is called with a prefix argument, matching strings are
2967 collected into the `*Occur*' buffer without line numbers. If there
2968 are parenthesized subexpressions in the specified regexp, `occur'
2969 reads replacement text that may contain \\& and \\N whose convention
2970 follows `replace-match'.
2973 * Changes in Specialized Modes and Packages in Emacs 24.1
2975 ** Archive Mode has basic support for browsing and updating 7z archives.
2979 *** BibTeX mode now supports biblatex.
2980 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2981 `bibtex-entry-field-alist' is now an obsolete alias for
2982 `bibtex-BibTeX-entry-alist'.
2984 *** New command `bibtex-search-entries', bound to C-c C-a.
2986 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2988 *** New variable `bibtex-search-entry-globally'.
2992 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2994 *** The default browser used by the package is now the "xdg-open" program,
2995 on platforms that support it. This calls your desktop's preferred browser.
2999 *** Support for musical notes.
3001 *** Support for logarithmic units.
3003 *** No longer uses the tex prefix for TeX specific unit names when
3004 using TeX or LaTeX mode.
3006 *** New option to highlight selections using faces.
3008 *** `calc-histogram' has the option of using a vector to determine the bins.
3010 *** New "O" option prefix.
3012 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3014 ** Calendar, Diary, and Appt
3016 *** Diary entries can contain non-printing "comments".
3017 See the variable `diary-comment-start'.
3019 *** Appointments can specify their individual warning times.
3020 See the variable `appt-warning-time-regexp'.
3022 *** The function specified by `appt-disp-window-function' may be passed
3023 lists of arguments if multiple appointments are due at similar times.
3024 If you are using a custom function for this, you should update it.
3026 *** New function `diary-hebrew-birthday'.
3028 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3029 may no longer be nil, but must all be strings.
3031 *** The obsolete (since Emacs 22.1) method of enabling the appt
3032 package by adding `appt-make-list' to `diary-hook' has been removed.
3033 Use `appt-activate' instead.
3035 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3036 appt-issue-message (use the function appt-activate)
3037 appt-visible/appt-msg-window (use the variable appt-display-format)
3039 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3040 view-diary-entries, list-diary-entries, show-all-diary-entries
3044 *** New feature to "guess" the style in an existing buffer.
3045 The main entry point is M-x c-guess.
3047 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3049 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3050 Thus C-M-a will, by default, go to the beginning of the immediate function,
3053 *** "Macros with semicolons" can be registered for correct indentation.
3054 Where such a macro ends a line (no semicolon) the next statement is no longer
3055 parsed as a statement continuation.
3057 ** Comint and modes derived from it use the standard completion code.
3061 *** Compilation mode can be used without Font Lock mode.
3062 `compilation-parse-errors-function' is now obsolete.
3064 *** New variable `compilation-filter-start', which is bound while
3065 `compilation-filter-hook' runs. It records the start position of the
3066 text inserted by `compilation-filter'.
3068 *** `compilation-error-screen-columns' and `compilation-first-column'
3069 are obeyed in the editing buffer. So programming language modes can
3070 set them, whereas previously only the value in the *Compilation*
3075 *** Customize buffers now contain a search field.
3076 The search is performed using `customize-apropos'.
3077 To turn off the search field, set `custom-search-field' to nil.
3079 *** Options in customize group buffers start out hidden if not customized.
3080 Use the arrow to the left of the option name to toggle visibility.
3082 *** custom-buffer-sort-alphabetically now defaults to t.
3084 *** The color widget now has a "Choose" button, which allows you to
3085 choose a color via `list-colors-display'.
3089 *** It is now possible to access buses other than the default system
3092 *** The `dbus-register-method' and `dbus-register-property' functions
3093 optionally do not register names.
3095 *** The new function `dbus-register-service' registers a known service
3096 name on a D-Bus without also registering a property or a method.
3100 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3101 if called with a prefix argument, read a file name from the minibuffer
3102 instead of using the current buffer.
3104 *** The "dired local variables" feature of Dired-x is obsolete.
3105 The standard directory local variables feature replaces it.
3109 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3110 controlling attempts to autojoin a channel.
3112 *** New variable `erc-coding-system-precedence': If we use `undecided'
3113 as the server coding system, this variable will then be consulted.
3114 The default is to decode strings that can be decoded as utf-8 as
3115 utf-8, and do the normal `undecided' decoding for the rest.
3119 *** The default value of `eshell-directory-name' has changed
3120 to be an "eshell" directory in `user-emacs-directory'.
3121 The old "~/.eshell/" directory is still used if it exists, though.
3125 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3126 It now supports multithread non-stop debugging and simultaneous
3127 debugging of several threads.
3131 *** RET (`image-toggle-animation') toggles animation, if applicable.
3132 Animation plays once, unless the option `image-animate-loop' is non-nil.
3136 *** New command M-x info-display-manual displays a named Info manual.
3137 If that manual is already visited in some Info buffer, it displays
3138 that buffer. (This is handy if you have many manuals in many *info*
3139 buffers, and don't remember the name of the buffer visiting the manual
3140 you want to consult.) Otherwise, it loads and displays the manual.
3142 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3143 This is for compatibility with the stand-alone Info reader program,
3144 and also because `Info-edit' is a rarely used command that is disabled
3147 ** Mail mode changes (not Message mode)
3149 *** New command M-x mail-add-attachment for adding MIME attachments
3151 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3152 (Its name is misleading, since it has nothing to do with MIME
3153 attachments.) The old name is now an obsolete alias to the new name.
3155 ** MH-E has been updated to MH-E version 8.3.1.
3156 See MH-E-NEWS for details.
3158 ** Modula-2 mode provides auto-indentation.
3160 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3162 ** nXML mode no longer binds C-RET to `nxml-complete'.
3163 Completion is now performed via `completion-at-point', bound to C-M-i
3164 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3165 default), this performs tag completion.
3167 ** Org mode has been updated to version 7.8.09.
3168 See ORG-NEWS for details.
3170 ** Prolog mode has been completely revamped, with lots of additional
3171 functionality such as more intelligent indentation, electricity,
3172 support for more variants, including Mercury, and a lot more.
3176 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3177 in the Rmail incoming message.
3179 *** The variable `rmail-message-filter' no longer has any effect.
3180 This change was made in Emacs 23.1 but was not advertised at the time.
3181 Try using `rmail-show-message-hook' instead.
3185 *** M-x shell prompts for the shell path name if the default directory
3186 is a remote file name and neither the environment variable $ESHELL nor
3187 the variable `explicit-shell-file-name' is set.
3189 *** TAB is now bound to the standard `completion-at-point' command,
3190 which now implements the pcomplete rules for shell command completion.
3194 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3195 if the mail server supports them. This uses either built-in GnuTLS
3196 support, or the starttls.el library. Customize `smtpmail-stream-type'
3199 *** The variable `smtpmail-auth-credentials' has been removed.
3200 By default, the information is now stored in the file ~/.authinfo.
3201 This was the default value of smtpmail-auth-credentials. If you had
3202 customized smtpmail-auth-credentials to a list of user names and
3203 passwords, those settings are not used. During your first connection
3204 to the smtp server, Emacs will prompt for the user name and password,
3205 and offer to save them to ~/.authinfo. Or you can manually copy the
3206 credentials to ~/.authinfo. For example, if you had
3208 (setq smtpmail-auth-credentials
3209 '(("mail.example.org" 25 "jim" "s!cret")))
3211 then the equivalent line in ~/.authinfo would be
3213 machine mail.example.org port 25 login jim password s!cret
3215 See the auth-source manual for more information, e.g. on encrypting
3216 the credentials file.
3218 *** The variable `smtpmail-starttls-credentials' has been removed.
3219 If you had that set, you need to put
3221 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3223 in your ~/.authinfo file instead.
3225 *** SMTPmail defaults to using the address in the From: header as the
3226 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3227 to the address you wish to use instead.
3231 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3232 and `sql-oracle-scan-on'.
3234 *** New options controlling prompting for login parameters.
3235 Each supported product has a custom variable `sql-*-login-params',
3236 which is a list of the parameters to be prompted for before a
3237 connection is established.
3239 *** The command `sql-product-interactive' now takes a prefix argument,
3240 which causes it to prompt for an SQL product.
3242 *** Product-specific SQL interactive commands now take prefix arguments.
3243 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3244 given a prefix argument, prompt for a name for the SQL interactive
3245 buffer. This reduces the need for calling `sql-rename-buffer'.
3247 *** SQL interactive modes suppress command continuation prompts, and
3248 replace tabs with spaces. The first change impacts multiple line SQL
3249 statements entered with C-j between each line, statements yanked into
3250 the buffer and statements sent with `sql-send-*' functions. The
3251 second prevents the MySQL and Postgres interpreters from listing
3252 object name completions when sent text via `sql-send-*' functions.
3254 *** New command `sql-connect' starts a predefined SQLi session,
3255 using the login parameters from `sql-connection-alist'.
3257 *** New "Save Connection" menu item in SQLi buffers.
3258 This gathers the login params specified for the SQLi session, if it
3259 was not started by a connection, and saves them as a new connection.
3261 *** New commands for listing database objects and details:
3262 sql-list-all and sql-list-table.
3264 *** An API for manipulating SQL product definitions has been added.
3268 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3272 *** New inline access method "ksu" (kerberized su).
3274 *** The following access methods are discontinued: "ssh1_old",
3275 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3277 *** The user option `remote-file-name-inhibit-cache' controls whether
3278 remote file attributes are cached for better performance.
3280 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3281 default value to "".
3283 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3284 for remote machines which support SELinux.
3286 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3287 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3288 the degree of parallelism.
3290 ** VC and related modes
3292 *** Support for pulling on distributed version control systems.
3293 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3294 supported (currently with Bzr, Git, and Mercurial), to update the
3295 current branch and working tree. A prefix argument means to prompt
3296 the user for specifics, e.g. a pull location.
3298 *** `vc-update' is now an alias for `vc-pull'.
3300 *** Support for merging on distributed version control systems.
3301 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3302 is supported (currently with Bzr, Git, and Mercurial), to merge
3303 changes from another branch into the current one. It prompts for
3304 specifics, e.g. a merge source.
3306 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3307 shows a diff while querying the user. It defaults to t.
3309 *** Log entries in some Log View buffers can be toggled to display a
3310 longer description by typing RET (log-view-toggle-entry-display).
3311 This is currently supported for Bzr, Git, and Mercurial (to support
3312 another backend, define a `log-view-expanded-log-entry-function').
3313 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3314 use this to display the full log entry for the revision at point.
3316 *** New command `vc-ediff' allows visual comparison of two revisions
3317 of a file similar to `vc-diff', but using ediff backend.
3319 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3320 this was not advertised at the time.
3322 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3323 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3324 this was not advertised at the time.
3330 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3332 *** partial-completion-mode (complete.el) is obsolete.
3333 You can get a comparable behavior with:
3334 (setq completion-styles '(partial-completion initials))
3335 (setq completion-pcm-complete-word-inserts-delimiters t)
3337 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3339 *** pgg is obsolete (use EasyPG instead).
3341 *** sregex.el is obsolete, since rx.el is a strict superset.
3343 *** s-region.el and pc-select.el are obsolete.
3344 They are superseded by shift-select-mode, enabled by default since 23.1.
3346 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3350 *** The Landmark game is now invoked with `landmark', not `lm'.
3351 Its functions and variables have been similarly renamed.
3353 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3354 (This interfered with cua-mode.)
3356 *** f90.el has some support for Fortran 2008 syntax.
3358 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3360 *** New command `nato-region' converts text to NATO phonetic alphabet.
3363 * New Modes and Packages in Emacs 24.1
3365 ** Occur Edit mode applies edits made in *Occur* buffers to the
3366 original buffers. It is bound to "e" in Occur mode.
3368 ** New global minor mode electric-pair-mode.
3369 When enabled, typing an open parenthesis automatically inserts the
3370 matching closing one.
3372 ** New global minor mode electric-indent-mode.
3373 When enabled, typing certain characters triggers reindentation.
3374 Major modes wishing to use this can set electric-indent-chars or
3375 electric-indent-functions.
3377 ** New global minor mode electric-layout-mode.
3378 When enabled, typing certain characters automatically inserts newlines.
3379 Major modes wishing to use this can set electric-layout-rules.
3381 ** tabulated-list.el provides a generic major mode for tabulated data,
3382 from which other modes can be derived.
3384 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3386 ** secrets.el is an implementation of the Secret Service API, an
3387 interface to password managers like GNOME Keyring or KDE Wallet. The
3388 Secret Service API requires D-Bus for communication. The command
3389 `secrets-show-secrets' offers a buffer with a visualization of the
3392 ** notifications.el provides an implementation of the Desktop
3393 Notifications API. It requires D-Bus for communication.
3395 ** soap-client.el supports access to SOAP web services from Emacs.
3396 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3398 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3400 ** New emacs-lock.el package.
3401 The previous version has been moved to obsolete/old-emacs-lock.el.
3402 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3403 against exiting Emacs and killing the buffer can be set separately.
3404 The mechanism for automatically turning off protection for buffers
3405 with dead inferior processes has been generalized.
3408 * Incompatible Lisp Changes in Emacs 24.1
3410 ** Passing a nil argument to a minor mode function call now ENABLES
3411 the minor mode unconditionally. This is so that you can write e.g.
3413 (add-hook 'text-mode-hook 'foo-mode)
3415 to enable foo-mode in Text mode buffers, removing the need for
3416 `turn-on-foo-mode' style functions. This affects all mode commands
3417 defined by `define-minor-mode'. If called interactively, the mode
3418 command still toggles the minor mode.
3420 ** The return value of `backup-buffer' has changed.
3421 It is now a list of three elements, where the second element is a list
3422 describing the original file's SELinux context. If Emacs or the
3423 system lacks SELinux support, the context list is (nil nil nil nil).
3424 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3426 ** `char-direction-table' and the `char-direction' function were deleted.
3427 They were buggy and inferior to the new support of bidirectional
3428 editing introduced in Emacs 24. If you need the bidirectional
3429 properties of a character, use `get-char-code-property' with the last
3430 argument `bidi-class'.
3432 ** `copy-directory' now copies the source directory as a subdirectory
3433 of the target directory, if the latter is an existing directory. The
3434 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3435 the contents directly into a pre-existing target directory.
3437 ** For mouse click input events in the text area, the Y pixel
3438 coordinate in the POSITION list now counts from the top of the text
3439 area, excluding any header line. Previously, it counted from the top
3442 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3443 been further reduced. Now a backquote not followed by a space is
3444 always treated as a "new-style" backquote. Please remove all
3445 "old-style" backquotes from your code. If your code uses backquotes
3446 as documented in the Elisp manual, and compiles without warning, then
3447 you have nothing to do in this regard. Code not following the
3448 appropriate conventions may fail to compile.
3450 The most common cause of trouble seems to be an old-style backquote
3451 followed by a newline. Another cause of trouble is vector notation
3452 for key sequence notation: instead of [(control ,)] and [(control ')],
3453 you should write [(control ?,)] and [(control ?')], which will work in
3456 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3457 was not advertised at the time. The function `custom-initialize-delay'
3458 replaced all known uses.
3460 ** `view-buffer' now treats special mode-class in the same way that
3461 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3462 major mode is special).
3464 ** Menu and tool bar changes
3466 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3467 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3468 With these alist entries omitted, `make-frame' checks the value of the
3469 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3470 a menu-bar or tool-bar, respectively. If the alist entries are added,
3471 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3473 *** The menu bar bindings's caches are not used any more.
3474 Use (where-is-internal <def> nil t) instead.
3476 ** Regions created by mouse dragging are now normal active regions,
3477 similar to those created by shift-selection (see Selection changes
3478 above). In previous Emacs versions, these regions were delineated by
3479 `mouse-drag-overlay'; that variable has been removed.
3481 ** The fourth argument of `filter-buffer-substring' has been removed.
3482 If you want to remove text properties from the final result, simply
3483 pass the result through substring-no-properties.
3485 ** cl.el no longer provides `cl-19'.
3487 ** The following obsolete functions and aliases have been removed
3488 (the appropriate new function is given in parentheses; "not needed"
3489 means you can just remove all calls to the function in question):
3491 *** `comint-kill-output' (`comint-delete-output')
3492 *** `decompose-composite-char' (`char-to-string')
3493 *** `outline-visible' (`outline-invisible-p')
3494 *** `internal-find-face' (`facep')
3495 *** `internal-get-face' (`facep and check-face')
3496 *** `frame-update-faces' (not needed)
3497 *** `frame-update-face-colors' (`frame-set-background-mode')
3498 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3499 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3500 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3501 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3502 *** `x-make-font-unbold' (`make-face-unbold')
3503 *** `x-make-font-unitalic' (`make-face-unitalic')
3504 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3505 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3506 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3507 *** `char-bytes' (== 1)
3508 *** `isearch-return-char' (`isearch-printing-char')
3509 *** `make-local-hook' (not needed)
3510 *** `set-screen-height' (`set-frame-height')
3511 *** `set-screen-width' (`set-frame-width')
3513 ** The following obsolete variables and varaliases have been removed
3514 (the appropriate new variable is given in parentheses):
3516 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3517 *** `vc-header-alist' (`vc-BACKEND-header')
3518 *** `directory-sep-char' (== ?/)
3519 *** `font-lock-defaults-alist' (`font-lock-defaults')
3520 *** `e' (`float-e').
3522 ** The following obsolete files were removed:
3523 sc.el, x-menu.el, rnews.el, rnewspost.el
3525 ** The format of the finder-inf.el file has changed, since the Finder
3526 mechanism is now based on the package system. The variable
3527 `finder-package-info' is replaced by `package--builtins' and
3528 `finder-keywords-hash'.
3530 ** When generating autoloads, `update-directory-autoloads' no longer
3531 assumes every inspected file is in your `load-path'. It instead
3532 generates relative names according to the current `load-path'.
3535 * Lisp Changes in Emacs 24.1
3537 ** Code can now use lexical scoping by default instead of dynamic scoping.
3538 The `lexical-binding' variable enables lexical scoping for local
3539 variables. It is typically set via a file-local variable in the first
3540 line of the file, in which case it applies to all the code in that
3543 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3544 binding instead of the old dynamic binding mode.
3546 *** Lexically scoped interpreted functions are represented with a new form
3547 of function value which looks like (closure ENV ARGS &rest BODY).
3549 *** New macro `letrec' to define recursive local functions.
3551 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3552 So do `defcustom' and other forms that call `defvar' as a subroutine.
3554 *** New function `special-variable-p' to check whether a variable is
3555 declared as dynamically bound.
3557 *** The form ((lambda ...) ...) is deprecated.
3559 ** An Emacs Lisp testing tool is now included.
3560 Emacs Lisp developers can use this tool to write automated tests for
3561 their code. See the ERT info manual for details.
3563 ** Changes for bidirectional display and editing
3565 *** New function `current-bidi-paragraph-direction'.
3566 This returns the base direction of the paragraph at point.
3568 *** New function `bidi-string-mark-left-to-right'.
3569 Given a string containing characters from right-to-left scripts, this
3570 function returns another string which can be safely inserted into a
3571 buffer, such that any following text will be always displayed to the
3572 right of that string. (This works by appending an invisible Unicode
3573 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3575 This is useful when the buffer has overall left-to-right paragraph
3576 direction and you need to insert a string whose contents are not known
3577 in advance, without disrupting the layout of the line.
3581 *** Window tree functions are accessible in Elisp.
3582 Functions are provided to return the parent, siblings or child windows
3583 of any window including internal windows (windows not associated with a
3584 buffer) in the window tree.
3586 **** New function `window-valid-p' gives non-nil for live and internal
3589 **** Window manipulation can deal with internal windows.
3590 Many window handling functions like `split-window', `delete-window', or
3591 `delete-other-windows' as well as the window resizing functions can now
3592 act on any window including internal ones.
3594 *** window-total-height/-width vs window-body-height/-width.
3595 The function `window-height' has been renamed to `window-total-height'
3596 and `window-width' has been renamed to `window-body-width'. The old
3597 names are provided as aliases. Two new functions `window-total-width'
3598 and `window-body-height' are provided.
3600 *** Window parameters specific to window handling functions.
3601 For each window you can specify a parameter to override the default
3602 behavior of a number of functions like `split-window', `delete-window'
3603 and `delete-other-windows'. The variable `ignore-window-parameters'
3604 allows to ignore processing such parameters.
3606 *** New semantics of third argument of `split-window'.
3607 The third argument of `split-window' has been renamed to SIDE and can be
3608 set to any of the values 'below, 'right, 'above, or 'left to make the
3609 new window appear on the corresponding side of the window that shall be
3610 split. Any other value of SIDE will cause `split-window' to split the
3611 window into two side-by-side windows as before.
3613 *** Window resizing functions.
3614 A new standard function for resizing windows called `window-resize' has
3615 been introduced. This and all other functions for resizing windows no
3616 longer delete any windows when they become too small.
3618 *** Deleting the selected window now selects the most recently selected
3619 live window on that frame instead.
3621 *** `adjust-window-trailing-edge' adjustments.
3622 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3623 is able to resize other windows if a window adjacent to the trailing
3624 edge cannot be shrunk any more. This makes its behavior more similar to
3625 that of Emacs 21 without compromising, however, its inability to delete
3626 windows which was introduced in Emacs 22.
3628 *** Window-local buffer lists.
3629 Windows now have local buffer lists. This means that removing a buffer
3630 from display in a window will preferably show the buffer previously
3631 shown in that window with its previous window-start and window-point
3632 positions. This also means that the same buffer may be automatically
3633 shown twice even if it already appears in another window.
3635 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3636 which if non-nil requires the buffer to be displayed in the currently
3637 selected window, signaling an error otherwise. If nil, another window
3638 can be used, e.g. if the selected one is strongly dedicated.
3640 *** `split-window-vertically' and `split-window-horizontally' renamed
3641 to `split-window-below' and `split-window-right' respectively.
3642 The old names are kept as aliases.
3646 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3647 named ACTION, and takes a display action of the same form as
3648 `display-buffer-base-action' (see Changes, above). A non-nil,
3649 non-list value is treated specially, as the old meaning.
3651 **** New variable `display-buffer-overriding-action'.
3653 **** The procedure of `display-buffer' etc. to choose a window is
3654 determined by combining `display-buffer-overriding-action',
3655 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3656 and `display-buffer-fallback-action'. The second and fourth of these
3657 are user-customizable variables.
3659 See the docstring of `display-buffer' for details.
3661 *** New functions `window-state-get' and `window-state-put'.
3662 These functions allow to save and restore the state of an arbitrary
3663 frame or window as an Elisp object.
3667 *** New variable `completion-extra-properties' used to specify extra
3668 properties of the current completion:
3669 - :annotate-function, same as the old completion-annotate-function.
3670 - :exit-function, function to call after completion took place.
3672 *** Functions on `completion-at-point-functions' can return any of the
3673 properties valid for `completion-extra-properties'.
3675 *** `completion-annotate-function' is obsolete.
3677 *** New `metadata' method for completion tables. The metadata thus returned
3678 can specify various details of the data returned by `all-completions':
3679 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3680 used to select a style in completion-category-overrides.
3681 - `annotation-function' to add annotations in *Completions*.
3682 - `display-sort-function' to specify how to sort entries in *Completions*.
3683 - `cycle-sort-function' to specify how to sort entries when cycling.
3685 *** `minibuffer-local-filename-must-match-map' is not used any more.
3686 Instead, the bindings in `minibuffer-local-filename-completion-map'
3687 are combined with `minibuffer-local-must-match-map'.
3689 *** New variable `completing-read-function' allows overriding the
3690 behavior of `completing-read'.
3692 ** `glyphless-char-display' can now distinguish between graphical and
3693 text terminal display, via a char-table entry that is a cons cell.
3695 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3696 Instead, the offending function is removed.
3700 *** New function `run-hook-wrapped' for running an abnormal hook by
3701 passing the hook functions as arguments to a "wrapping" function.
3702 Like `run-hook-with-args-until-success', it stops at the first
3703 non-nil return value.
3705 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3706 set of "wrapping" filters, similar to around advice.
3707 (A version of this macro was actually added in Emacs 23.2 but was not
3708 advertised at the time.)
3712 *** New macro `condition-case-unless-debug' (this was actually added in
3713 Emacs 23.1 as condition-case-no-debug, but not advertised)
3715 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3717 *** Variable `stack-trace-on-error' removed.
3719 *** The debugger can now "continue" from an error, which means it will
3720 jump to the error handler as if the debugger had not been invoked
3721 instead of jumping all the way to the top-level.
3723 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3724 This can be useful when `inhibit-quit' is set.
3726 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3727 named Emacs server instances.
3729 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3730 to redirect STDOUT to a file.
3732 ** The function `format-time-string' now supports the %N directive,
3733 for higher-resolution time stamps.
3735 ** New input reading functions
3737 *** New function `read-char-choice' reads a restricted set of
3738 characters, discarding any inputs not inside the set.
3740 *** The command `read-color' now requires a match for a color name
3741 or RGB triplet, instead of signaling an error if the user provides
3744 **** `facemenu-read-color' is now an alias for `read-color'.
3746 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3747 The variable is now used to load all kind of supported dynamic libraries,
3748 not just image libraries. The previous name is still available as an
3751 ** Syntax parsing changes
3753 *** New variable `syntax-propertize-function'.
3754 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3755 This allows syntax-table properties to be set independently from font-lock:
3756 just call syntax-propertize to make sure the text is propertized.
3757 Together with this new variable come a new hook
3758 syntax-propertize-extend-region-functions, as well as two helper functions:
3759 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3760 as-is; and syntax-propertize-rules which provides a new way to specify
3763 *** Syntax tables support a new "comment style c" additionally to style b.
3765 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3767 ** frame-local variables cannot be let-bound any more.
3769 ** Major and minor mode changes
3771 *** `set-auto-mode' now respects mode: local variables at the end of files,
3772 as well as those in the -*- line.
3774 *** `prog-mode' is a new major mode from which programming modes
3777 **** `prog-mode-hook' can be used to enable features for programming
3778 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3779 on-the-fly spell checking for comments and strings.
3781 *** New hook `change-major-mode-after-body-hook', run by
3782 `run-mode-hooks' just before any other mode hooks.
3784 *** Enabled globalized minor modes can be disabled in specific major modes.
3785 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3786 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3788 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3790 ** File-handling changes
3792 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3793 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3794 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3795 argument is supplied (see Trash changes, above).
3797 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3799 ** Tool-bars can display separators.
3800 Tool-bar separators are handled like menu separators in menu-bar maps,
3801 i.e. via menu entries of the form `(menu-item "--")'.
3805 *** Animated images support (currently animated gifs only).
3807 **** `image-animated-p' returns non-nil if an image can be animated.
3809 **** `image-animate' animates a supplied image spec.
3811 **** `image-animate-timer' returns the timer object for an image that
3814 *** `image-extension-data' has been renamed to `image-metadata'.
3815 The old name is an obsolete alias to the new one.
3817 *** Image mode can view any image type that ImageMagick supports.
3818 This requires Emacs to be built with ImageMagick support.
3820 **** New function `imagemagick-types', defined if ImageMagick support
3821 is enabled, returns a list of image file extensions that your
3822 ImageMagick installation supports.
3824 **** New function `imagemagick-register-types' enables ImageMagick
3825 image types in Image mode and in `create-image' and other helper
3828 **** New option `imagemagick-types-inhibit' excludes certain
3829 ImageMagick image types from `imagemagick-register-types'.
3831 **** With ImageMagick support, there are extra Image mode commands to
3832 resize and rotate images: `image-transform-fit-to-height',
3833 `image-transform-fit-to-width', `image-transform-set-rotation', and
3834 `image-transform-set-scale'.
3836 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3837 passes it to the mail user agent function. This argument specifies an
3838 action for returning to the caller after finishing with the mail. For
3839 example, this is used by Rmail to optionally delete a mail window.
3841 ** XML and HTML parsing
3842 If Emacs is compiled with libxml2 support, there are two new
3843 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3844 and `libxml-parse-xml-region' (which parses XML). Both return an
3845 Emacs Lisp parse tree.
3847 ** Networking and encryption changes
3849 *** `open-network-stream' can now be used to open an encrypted stream.
3850 It now accepts an optional `:type' parameter for initiating a TLS
3851 connection, directly or via STARTTLS. To do STARTTLS, additional
3852 parameters (`:end-of-command', `:success', `:capabilities-command')
3853 must also be supplied.
3855 *** New library gnutls.el.
3856 The new function `gnutls-available-p' returns non-nil if Emacs is
3857 built with GnuTLS support. The main entry points are
3858 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3859 these functions through `open-network-stream', because that can
3860 upgrade connections through STARTTLS opportunistically or use plain
3861 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3864 *** New primitive `secure-hash' that supports many secure hash algorithms:
3865 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3866 sha1.el has been removed. The `sha1' feature is provided by default.
3870 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3872 ** Progress reporters can now "spin".
3873 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3874 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3875 time you call `progress-reporter-update' on that progress reporter,
3876 with a nil or omitted VALUE argument, the reporter message is
3877 displayed with a "spinning bar".
3879 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3880 being reverted, even if the buffer has a local `revert-buffer-function'.
3882 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3883 If delayed-warnings-list is non-nil, the command loop calls
3884 `delayed-warnings-hook' after `post-command-hook'. At present, this
3885 is only used by Emacs on some platforms to display warnings during
3886 startup, which might otherwise not be noticed. This uses the
3887 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3889 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3891 ** New function `make-composed-keymap' that constructs a new keymap
3892 from multiple input maps. You can use this to make a keymap that
3893 inherits from multiple maps, eg:
3894 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3896 ** New function `string-prefix-p'.
3897 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3899 ** New reader macro ## that stands for the empty symbol.
3900 This means that the empty symbol can now be read back. Also, #: by itself
3901 (when not immediately followed by a possible symbol character) stands for
3902 an empty uninterned symbol.
3904 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3906 ** The following functions and variables are obsolete:
3908 *** `tooltip-use-echo-area' is obsolete.
3909 Rather than setting this to t, disable Tooltip mode instead.
3911 *** buffer-substring-filters is obsolete.
3912 Use `filter-buffer-substring-functions' instead.
3914 *** `byte-compile-disable-print-circle' is obsolete.
3916 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3917 Use `post-command-hook' instead.
3919 *** `font-lock-maximum-size' is obsolete.
3922 * Changes in Emacs 24.1 on Non-Free Operating Systems
3924 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3925 and also when HOME is set to C:\ by default.
3927 ** New configure.bat options
3929 *** --enable-checking builds Emacs with extra runtime checks.
3931 *** --distfiles specifies files to be included in binary distribution.
3933 *** --without-gnutls disables automatic GnuTLS detection.
3935 *** --lib for general library linkage, works with the USER_LIBS build variable.
3937 ** New make target `dist' to create binary distribution for MS Windows.
3939 ** The Lisp function `w32-default-color-map' is now obsolete.
3940 (It is only used internally in the Emacs C code.)
3942 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3943 reappear on mouse-over. (Requires OS X 10.6 or later.)
3945 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3946 other platforms, rather than inserting its contents into the buffer.
3949 ----------------------------------------------------------------------
3950 This file is part of GNU Emacs.
3952 GNU Emacs is free software: you can redistribute it and/or modify
3953 it under the terms of the GNU General Public License as published by
3954 the Free Software Foundation, either version 3 of the License, or
3955 (at your option) any later version.
3957 GNU Emacs is distributed in the hope that it will be useful,
3958 but WITHOUT ANY WARRANTY; without even the implied warranty of
3959 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3960 GNU General Public License for more details.
3962 You should have received a copy of the GNU General Public License
3963 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3968 paragraph-separate: "[
\f]*$"