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 24.5
28 ** Building Emacs now requires C99 or later.
30 ** Building Emacs now requires GNU make, version 3.81 or later.
32 ** By default, Emacs no longer works on IRIX. We expect that Emacs
33 users are not affected by this, as SGI stopped supporting IRIX in
34 December 2013. If you are affected, please send a bug report. You
35 should be able to work around the problem either by porting the Emacs
36 undumping code to GCC under IRIX, or by configuring --with-wide-int,
37 or by sticking with Emacs 24.4.
40 ** The configure option `--with-pkg-config-prog' has been removed.
41 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
44 * Startup Changes in Emacs 24.5
47 * Changes in Emacs 24.5
49 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
52 ** The default value of `history-length' has increased to 100.
55 ** The new variable `term-file-aliases' replaces some files from lisp/term.
56 The function `tty-run-terminal-initialization' consults this variable
57 when deciding what terminal-specific initialization code to run.
60 ** New variable `system-configuration-features', listing some of the
61 main features that Emacs was compiled with. This is mainly intended
62 for use in Emacs bug reports.
65 * Editing Changes in Emacs 24.5
67 ** Emacs now supports "bracketed paste mode" when running on a terminal
68 that supports it. This facility allows Emacs to understand pasted
69 chunks of text as strings to be inserted, instead of interpreting each
70 character in the pasted text as actual user input. This results in a
71 paste experience similar to that under a window system, and significant
72 performance improvements when pasting large amounts of text.
75 * Changes in Specialized Modes and Packages in Emacs 24.5
78 *** Strings after `:documentation' are highlighted as docstrings.
81 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
82 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
83 *** `string-rectangle' provides on-the-fly preview of the result.
85 ** New font-lock functions font-lock-ensure and font-lock-flush, which
86 should be used instead of font-lock-fontify-buffer when called from Elisp.
91 *** New commands to insert diary entries with Chinese dates:
92 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
93 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
96 *** Calendar can list and mark diary entries with Chinese dates.
97 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
100 ** The Rmail commands d, C-d and u now handle repeat counts to delete or
101 undelete multiple messages.
103 ** SES now supports local printer functions; see `ses-define-local-printer'.
105 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
106 specify the type of shell in use (bash, csh, etc).
108 ** The URL package accepts now the protocols "ssh", "scp" and "rsync".
109 When `url-handler-mode' is enabled, file operations for these
110 protocols as well as for "telnet" and "ftp" are passed to Tramp.
114 *** New connection method "nc", which allows to access dumb busyboxes.
116 ** Calculator: decimal display mode uses "," groups, so it's more
117 fitting for use in money calculations; factorial works with
126 *** crisp.el, tpu-edt.el, ws-mode.el
127 These emulations of old editors are believed to be no longer relevant
128 - contact emacs-devel@gnu.org if you disagree.
131 *** vi.el, vip.el (try M-x viper instead)
134 * New Modes and Packages in Emacs 24.5
137 * Incompatible Lisp Changes in Emacs 24.5
139 ** window-configurations no longer record the buffers's marks.
141 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
142 active region handling.
144 ** deactivate-mark is now buffer-local.
146 ** `cl-the' now asserts that its argument is of the given type.
149 ** Mouse click events on mode line or header line no longer include
150 any reference to a buffer position. The 6th member of the mouse
151 position list returned for such events is now nil.
155 * Lisp Changes in Emacs 24.5
157 ** New function `funcall-interactively', which works like `funcall'
158 but makes `called-interactively-p' treat the function as (you guessed it)
159 called interactively.
161 ** New function `function-put' to use instead of `put' for function properties.
164 ** New properties that can be specified with `declare':
165 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
166 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
167 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
171 ** New macro `with-file-modes', for evaluating expressions with default file
172 permissions set to temporary values (e.g., for creating private files).
174 ** You can access the slots of structures using `cl-struct-slot-value'.
176 ** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
177 optional repeat-count argument.
180 * Changes in Emacs 24.5 on Non-Free Operating Systems
183 ** Building Emacs for MS-Windows requires at least Windows XP
184 or Windows Server 2003. The built binaries still run on all versions
185 of Windows starting with Windows 9X.
188 * Installation Changes in Emacs 24.4
190 ** Emacs can now be compiled with ACL (access control list) support.
191 This happens by default if a suitable support library is found at
192 build time, like libacl on GNU/Linux. To prevent this, use the
193 configure option `--disable-acl'. See below for the features this provides.
195 ** Emacs can now be compiled with file notification support.
196 This happens by default if a suitable system library is found at
197 build time. To prevent this, use the configure option
198 `--without-file-notification'. See below for file-notify features.
199 This feature is not available for the Nextstep port.
201 ** Emacs can now be compiled with zlib support.
202 This happens by default if zlib is present, which it normally is.
203 To prevent this, use the configure option `--without-zlib'.
204 This provides the function `zlib-decompress-region'; see below for details.
206 ** The configure option `--without-compress-info' has been generalized,
207 and renamed to `--without-compress-install'. It now prevents compression
208 of _any_ files during installation.
210 ** The configure option `--with-crt-dir' has been removed.
211 It is no longer needed, as the crt*.o files are no longer linked specially.
213 ** Directories passed to configure option `--enable-locallisppath' are
214 no longer created during installation.
216 ** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
217 This requires pkg-config to be available at build time.
220 * Startup Changes in Emacs 24.4
222 ** When initializing `load-path', an empty element in the EMACSLOADPATH
223 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
224 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
225 load-path (the one that would have been used if EMACSLOADPATH was unset).
226 This makes it easier to _extend_ the load-path via EMACSLOADPATH
227 (previously, EMACSLOADPATH had to specify the complete load-path,
228 including the defaults). (In older versions of Emacs, an empty element
229 was replaced by ".", so use an explicit "." now if that is what you want.)
231 ** The -L option, which normally prepends its argument to load-path,
232 will instead append, if the argument begins with `:' (or `;' on MS Windows;
233 i.e., `path-separator').
235 ** If you use either site-load.el or site-init.el to customize the dumped
236 Emacs executable, any changes to `load-path' that these files make
237 will no longer be present after dumping. To affect a permanent change
238 to `load-path', use the `--enable-locallisppath' option of `configure'.
240 ** The user option `initial-buffer-choice' can now specify a function
241 to set up the initial buffer.
244 * Changes in Emacs 24.4
246 ** Support for ACLs (access control lists).
247 This requires a suitable support library to be found at build time.
248 On GNU/Linux, the POSIX ACL interface is used via libacl.
249 On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
250 ACLs are extended file attributes, used e.g. for finer-grained permissions.
252 *** Emacs preserves the ACL entries of files when backing up.
254 *** New functions `file-acl' and `set-file-acl' get and set file ACLs.
256 ** Support for menus on text-mode terminals.
257 If the terminal supports a mouse, clicking on the menu bar, or on
258 sensitive portions of the mode line or header line, will drop down the
259 menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
260 C-mouse-3 on the text area will pop up the menus defined for those locations.
262 If the text terminal does not support a mouse, you can activate the
263 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
265 If you want the previous behavior, where F10 invoked `tmm-menubar',
266 customize the option `tty-menu-open-use-tmm' to a non-nil value.
267 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
270 ** New option `load-prefer-newer' affects how the `load' function chooses
271 the file to load. If this is non-nil, then when both .el and .elc
272 versions of a file exist, and the caller did not explicitly specify
273 which one to load, then the newer file is loaded. The default, nil,
274 means to always load the .elc file.
276 ** Multi-monitor support
278 *** New functions `display-monitor-attributes-list' and
279 `frame-monitor-attributes' can be used to obtain information about
280 each physical monitor on multi-monitor setups.
282 *** The functions `display-pixel-width' and `display-pixel-height' now
283 behave consistently among the platforms: they return the pixel width
284 or height for all physical monitors associated with the given display
285 as if they were on X. To get information for each physical
286 monitor, use the new functions above. Similar notes also apply to
287 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
288 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
290 ** New function `zlib-decompress-region', which decompresses gzip- and
291 zlib-format compressed data using built-in zlib support (if available).
293 ** The *Messages* buffer is created in `messages-buffer-mode',
294 a new major mode, with read-only status. Any code that might create
295 the *Messages* buffer should call the function `messages-buffer' to do
296 so and set up the mode.
298 ** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
299 You can change the default by customizing `blink-cursor-blinks'.
301 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
302 This affects View mode, etc.
304 ** The default value of `make-backup-file-name-function' is no longer nil.
305 Instead it defaults to a function that does what the nil value used to.
309 *** The command `apropos-variable' is renamed to `apropos-user-option'.
310 `apropos-user-option' shows all user options, while `apropos-variable'
311 shows all variables. When called with a universal prefix argument,
312 the two commands swap their behaviors. When `apropos-do-all' is
313 non-nil, they output the same results.
315 *** The key `?' now describes prefix bindings, like `C-h'.
317 *** The command `describe-function' has been extended for EIEIO.
318 Running it on constructors will show a full description of the
319 generated class. For generic functions, it will show all
320 implementations together with links to the source. The old commands
321 `describe-class', `describe-constructor' and `describe-generic' were
324 *** The function `quail-help' is no longer an interactive command.
325 Use `C-h C-\' (`describe-input-method') instead.
327 ** Frame and window handling
329 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
330 bound to <f11> and M-<f10>, respectively.
332 *** New hooks `focus-in-hook', `focus-out-hook'.
333 These are normal hooks run when an Emacs frame gains or loses input focus.
335 *** The function `window-in-direction' now takes additional arguments
336 for specifying a reference point, wrapping the selection around frame
337 borders, and specifying ways to select the minibuffer window.
339 *** Emacs can now change frame sizes in units of pixels, rather than
340 text rows or columns. When maximizing a frame or making it fullscreen,
341 remaining extra pixels are no longer given to the minibuffer, the rightmost
342 fringe, or other unusable space, but are distributed among the text
343 areas of the frame's windows. If the new option `frame-resize-pixelwise'
344 is non-nil, all frame size changes happen pixelwise and set the
345 corresponding size hints for the window manager.
347 *** Emacs can now change window sizes in units of pixels.
348 Mouse-dragging a mode line or window divider now changes the size of
349 adjacent windows pixelwise. If the new option `window-resize-pixelwise'
350 is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
351 resize windows pixelwise. Most functions for changing or accessing
352 window sizes now have an additional argument that allows changes to apply,
353 or values to be returned, in pixels instead of lines/columns.
355 *** The functions `window-body-height' and `window-body-width' now never
356 count partially visible lines or columns if called with a nil PIXELWISE
359 *** Emacs can now draw dividers between adjacent windows. To put
360 dividers between side-by-side/vertically stacked windows customize the
361 frame parameters `right-divider-width' and `bottom-divider-width' to
362 some positive integer. You can drag dividers with the mouse (they show
363 a corresponding cursor when the mouse hovers over them). You can change
364 the appearance of dividers by customizing the faces `window-divider',
365 `window-divider-first-pixel', and `window-divider-last-pixel'. The last
366 two are useful to provide a 3D effect, or to better distinguish dividers
367 from surrounding display objects.
369 *** New functions to return the pixel sizes of window components, namely
370 `window-scroll-bar-width', `window-mode-line-height',
371 `window-header-line-height', `window-right-divider-width', and
372 `window-bottom-divider-width'.
374 *** The new function `window-text-pixel-size' returns the size of the
375 text of a window's buffer in pixels. This allows functions like
376 `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
377 window to its buffer as it will be displayed.
379 *** `fit-window-to-buffer' can now resize windows in both dimensions.
380 This behavior is controlled by the new option
381 `fit-window-to-buffer-horizontally'. The new option
382 `fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
384 *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
385 options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
386 control the size of the frame and its position on screen.
388 *** Temp Buffer Resize Mode can now adjust the height and width of
389 windows and frames. The new option `temp-buffer-max-width' allows you to
390 control the width of temporary buffer windows. Moreover, if the new
391 option `fit-frame-to-buffer' is non-nil and the buffer appears in the
392 root window of a frame, Temp Buffer Resize Mode will try to adjust the
393 width and/or height of the frame.
395 *** `split-window' is now a non-interactive function, not a command.
396 As a command, it was a special case of `C-x 2' (`split-window-below'),
397 and as such superfluous. After being reimplemented in Lisp, its
398 interactive form was mistakenly retained.
400 *** The functions `window-size' and `window-total-size' now have an
401 optional argument to return a rounded size value.
403 *** `window-state-put' now allows you to put a window state into internal
406 *** New option `scroll-bar-adjust-thumb-portion'.
407 Available only on X, this option allows you to control over-scrolling
408 using the scroll bar (i.e., dragging the thumb down even when the end
409 of the buffer is visible).
411 *** New display actions functions for `display-buffer':
413 **** `display-buffer-in-previous-window' displays a buffer in a window
414 previously showing that buffer.
416 **** `display-buffer-at-bottom' chooses or creates a window at the
417 bottom of the selected frame.
419 **** `display-buffer-no-window' to not display the buffer in a window.
421 *** New display action alist entry `allow-no-window' to indicate the
422 caller of `display-buffer' is ready to handle the case of not displaying
423 the buffer in a window.
427 *** `eval-defun' on an already defined defcustom calls the :set function,
430 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
431 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
432 zero prefix argument. This disables truncation of lists in the output,
433 equivalent to setting `(eval-expression-)print-length' and
434 `(eval-expression-)print-level' to nil. Additionally, it causes integers
435 to be printed in other formats (octal, hexadecimal, and character).
437 *** New hook `eval-expression-minibuffer-setup-hook' run by
438 `eval-expression' on entering the minibuffer.
440 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
441 because it affects caching of paragraph scanning results as well.
442 There is no reason to set this to nil except for debugging purposes.
444 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
445 and works for git too, if you fetch the repository notes.
447 ** The default value of `comment-use-global-state' is now t,
448 and this variable has been marked obsolete.
450 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
452 ** The option `set-mark-default-inactive' has been deleted.
453 This unfinished feature was introduced by accident in Emacs 23.1;
454 simply disabling Transient Mark mode does the same thing.
457 * Editing Changes in Emacs 24.4
461 *** `electric-indent-mode' is now enabled by default.
462 Typing RET reindents the current line and indents the new line.
463 `C-j' inserts a newline but does not indent. In some programming modes,
464 additional characters are electric (eg `{').
466 *** New buffer-local `electric-indent-local-mode'.
468 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
469 When invoked without a prefix argument, it now activates a transient
470 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
471 the text indentation in the region. Typing any other key resumes
472 normal editing behavior.
474 *** `tab-stop-list' is now implicitly extended to infinity by repeating
475 the last step. Its default value is changed to nil, which means a tab
476 stop every `tab-width' columns.
478 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
479 In other words, if you visit two files that have the same base name,
480 then rather than creating buffers basename and basename<2>,
481 Emacs uses basename<dirA> and basename<dirB>. To change this,
482 customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
484 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
485 Most commands are still unaware of it, but kill/yank do work on the rectangle.
487 ** New option `visual-order-cursor-movement'.
488 If this is non-nil, cursor motion with arrow keys will follow the
489 visual order of characters on the screen: <left> always moves to the
490 left, <right> always moves to the right, disregarding the surrounding
491 bidirectional context.
493 ** New command `delete-duplicate-lines'.
494 This searches the region for identical lines, and removes all but one
495 copy of each repeated line. The lines need not be sorted.
497 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
498 When called in succession, it cycles between spacing conventions:
499 one space, no spaces, original spacing.
501 ** `blink-matching-paren' now only highlights the matching open-paren
502 by default, instead of moving the cursor. Set this variable to `jump' to
503 restore the old behavior.
505 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
506 a line after a one-letter word, which is an error in some typographical
507 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
511 *** All interactive commands that read a register (`copy-to-register', etc.)
512 now display a temporary window after `register-preview-delay' seconds
513 that summarizes existing registers. To disable this, set that option to nil.
514 Interactive commands that read registers and want to make use of this
515 should use `register-read-with-preview' to read register names.
517 *** New command `frameset-to-register' bound to `C-x r f', replacing
518 `frame-configuration-to-register'. It offers similar functionality,
519 plus enhancements like the ability to restore deleted frames.
520 (`frame-configuration-to-register' still exists, but no longer has a
523 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
527 * Changes in Specialized Modes and Packages in Emacs 24.4
529 ** Backtrace and debugger
531 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
532 display of local variables of the current stack frame.
534 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
535 the lexical environment when evaluating the code in the context at point
536 (and so allows you to access lexical variables).
538 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
540 ** Battery information can now be retrieved from BSD's `apm' utility.
542 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
546 *** Calc by default now uses the Gregorian calendar for all dates, and
547 uses January 1, 1 AD as its day number 1. Previously Calc used the
548 Julian calendar for dates before September 14, 1752, and it used
549 December 31, 1 BC as its day number 1; the new scheme is more
550 consistent with Calendar's calendrical system and day numbering.
552 *** The new option `calc-gregorian-switch' lets you configure if
553 (and when) Calc switches from the Julian to the Gregorian calendar.
555 *** Support for ISO 8601 dates.
557 ** Calendar and Diary
559 *** New faces `calendar-weekday-header', `calendar-weekend-header',
560 and `calendar-month-header'.
562 *** New option `calendar-day-header-array'.
564 *** New variable `diary-from-outlook-function', used by the command
565 `diary-from-outlook'.
567 *** The variable `calendar-font-lock-keywords' is obsolete.
573 **** The cpp-root project now supports executing a compile command.
574 It can be set through the new :compile-command slot or the
575 buffer-local variable `compile-command'.
577 **** Better selection of include directories for the 'linux' project.
578 Include directories now support out-of-tree build directories and
579 target architecture auto-detection.
583 **** Improved detection of used namespaces in current scope in C++.
585 **** Parsing of default values for variables and function arguments in C/C++.
586 They are also displayed by the summarize feature in the mode line.
588 **** Improved parsing of function pointers in C/C++.
589 This also includes parsing of function pointers as function arguments.
591 **** Parsing of C/C++ preprocessor macros that open new scope.
592 For example, this enables parsing of macros that open new namespaces.
594 **** Support for 'this' pointer in inline member functions in C++.
598 *** Support for completion, ElDoc, and Flycheck has been added.
600 *** The current CFEngine syntax is parsed from "cf-promises -s json".
601 There is a fallback syntax available if you don't have cf-promises or
602 if your version doesn't support that option. See option `cfengine-cf-promises'.
606 *** New macro `cl-tagbody'.
607 This executes statements while allowing for control transfer to labels.
609 *** letf is now just an alias for cl-letf.
613 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
614 Hence, you can now enable it independently from those modes, and from
615 `transient-mark-mode'.
617 *** `cua-highlight-region-shift-only' is now obsolete.
618 You can disable `transient-mark-mode' to get the same result.
620 *** CUA's rectangles can now be used without CUA by calling the command
621 `cua-rectangle-mark-mode'.
623 ** Delete Selection mode can now be used without Transient Mark mode.
627 *** `desktop-save-mode' by default now auto-saves an existing desktop file
628 after `desktop-auto-save-timeout'. To disable this, customize that option
631 *** Desktop now saves and restores the frame/window configuration.
632 To disable this, set `desktop-restore-frames' to nil.
633 See also related options `desktop-restore-reuses-frames',
634 `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
636 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
637 such as file ownership or permissions, are visible in Dired buffers.
638 See the new options `dired-hide-details-hide-symlink-targets' and
639 `dired-hide-details-hide-information-lines' for customizing what to hide.
641 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
642 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
643 The results display in the mode line.
645 ** Electric Pair mode
647 *** New option `electric-pair-preserve-balance', enabled by default.
648 If non-nil, pairing/skipping only kicks in when that help the balance
649 of parentheses and quotes; i.e., the buffer should end up at least as
652 You can further control this behavior by adjusting the predicates
653 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
655 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
656 In `electric-pair-mode', the commands `backward-delete-char' and
657 `backward-delete-char-untabify' are now bound to electric variants
658 that delete the closer when invoked between adjacent pairs.
660 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
661 In `electric-pair-mode', inserting a newline between adjacent pairs
662 opens an extra newline after point, which is indented if
663 `electric-indent-mode' is also set.
665 *** New option `electric-pair-skip-whitespace', enabled by default.
666 This controls if skipping over closing delimiters should jump over any
667 whitespace slack. Setting it to `chomp' makes it delete this
668 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
670 *** New variables control the pairing in strings and comments.
671 You can customize `electric-pair-text-pairs' and
672 `electric-pair-text-syntax-table' to tweak pairing behavior inside
673 strings and comments.
675 ** New EPA option `epa-mail-aliases'.
676 You can set this to a list of email address aliases that `epa-mail-encrypt'
677 should use to find keys.
679 ** New ERC option `erc-accidental-paste-threshold-seconds'.
680 If set to a number, this can be used to avoid accidentally pasting large
681 amounts of data into the ERC input.
683 ** New ERT macro `skip-unless' allows skipping ERT tests.
687 *** `eshell' now supports visual subcommands and options.
688 Eshell has been able to handle "visual" commands (interactive,
689 non-line oriented commands such as top that require display
690 capabilities not provided by eshell) by running them in an Emacs
691 terminal emulator. See `eshell-visual-commands'.
693 This feature has been extended to subcommands and options that make a
694 usually line-oriented command a visual command. Typical examples are
695 "git log" and "git <command> --help", which display their output in a
696 pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
698 *** New Eshell-Tramp module.
699 External su and sudo commands are now the default; the internal,
700 Tramp-using variants can still be used by enabling the eshell-tramp module.
702 ** New F90 mode option `f90-smart-end-names'.
704 ** New option `gnutls-verify-error', if non-nil, means that Emacs
705 should reject SSL/TLS certificates that GnuTLS determines as invalid.
706 (This option defaults to nil at present, but this is expected to change
707 in a future release.)
711 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
712 the symbol near point.
714 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
715 will cycle through faces in `hi-lock-face-defaults' without prompting.
717 ** Icomplete is now more similar to Ido.
719 *** Icomplete by default now applies to all forms of minibuffer completion.
720 The variable `icomplete-with-completion-tables' (now a user option)
721 controls this. To restore the old behavior, set it back to
722 '(internal-complete-buffer).
724 *** You can navigate through and select completions using the keys
725 from `icomplete-minibuffer-map'.
727 *** The string that separates potential completions is now a customizable
728 option (`icomplete-separator'). The default is " | " rather than ",".
730 *** New face `icomplete-first-match'; and new options
731 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
733 *** The option `icomplete-show-key-bindings' has been removed.
737 *** An Ido user manual is now included.
739 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
740 This means to use virtual buffers if the current ido input does not match
743 *** The variable `ido-decorations' can optionally have two new elements,
744 which are the brackets to use around the sole remaining completion.
748 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
749 visit the next image file and the previous image file in the same
750 directory, respectively.
752 *** New commands to show specific frames of multi-frame images.
753 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
754 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
756 *** New commands to speed up, slow down, or reverse animation.
757 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
758 speed up and slow down the animation. `a r' (`image-reverse-speed')
759 to reverse it and `a 0' (`image-reset-speed') to reset it.
761 *** The command `image-mode-fit-frame' deletes other windows.
762 When toggling, it restores the frame's previous window configuration.
763 It also has an optional frame argument, which can be used by Lisp
764 callers to fit the image to a frame other than the selected frame.
766 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
770 *** New Info face `info-index-match', used to highlight matches in index
771 entries displayed by `Info-index-next', `Info-virtual-index' and
774 *** The Info-edit command is obsolete. Editing Info nodes by hand
775 has not been relevant for some time.
779 *** New option `js-switch-indent-offset'.
781 *** Better indentation of multiple-variable declarations.
782 If a declaration spans several lines, variables on the following lines
783 are lined up to the first one.
785 *** Recognition and better indentation of continuations in array comprehensions.
787 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
791 *** Font locking for Texinfo comments and new keywords.
793 *** Completion in Octave file buffers.
797 *** Jump to definition.
799 *** Documentation lookup/search.
801 ** OPascal mode is the new name for Delphi mode
803 *** All delphi-* variables and functions have been renamed to opascal-*.
804 Obsolete aliases exist for those likely to have been used externally.
806 *** The option `delphi-newline-always-indents' has been removed.
807 Use `electric-indent-mode' instead.
809 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
813 *** The package library now supports digital signing of packages.
814 Maintainers of package archives should consider signing their packages
817 **** If the user option `package-check-signature' is non-nil,
818 Emacs tries to check package signatures at install time.
819 The value `allow-unsigned' allows installation of unsigned packages.
821 **** The user option `package-unsigned-archives' lists archives where
822 Emacs will not try to check signatures.
824 *** New option `package-pinned-packages'. This is useful if you have multiple
825 archives enabled, with more than one offering a given package that you want.
827 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
828 to filter the list of packages by a keyword.
830 *** In the `describe-package' buffer, there are now buttons listing the
831 keywords related to the package. Click on a button to see other packages
832 related to that keyword.
834 *** The format of `archive-contents' files, generated by package
835 repositories, has changed to allow a new (fifth) element in the data
836 vectors, containing an associative list with extra properties.
837 (For example, `describe-package' uses the `:url' extra property to
838 display a "Homepage" header.)
840 ** In Prolog mode, `prolog-use-smie' has been removed,
841 along with the non-SMIE indentation code.
845 *** The new command `remember-notes' creates a buffer that is saved on exit.
846 You can use it as a more permanent *scratch* buffer.
848 *** Remember can now store notes in separate files.
849 To use this, add `remember-store-in-files' to the `remember-handler-functions'
850 option. The files are saved in `remember-data-directory' using
851 names specified by `remember-directory-file-name-format'.
855 *** Customize `rmail-mbox-format' to influence some minor aspects of
856 how Rmail displays non-MIME messages.
858 *** The `unrmail' command now converts from BABYL to mboxrd format,
859 rather than mboxo. Customize `unrmail-mbox-format' to change this.
863 *** Improved syntax highlighting and indentation.
865 *** New `electric-indent-mode' integration.
867 *** New option `ruby-encoding-magic-comment-style'.
869 *** New option `ruby-custom-encoding-magic-comment-template'.
871 *** New option `ruby-align-to-stmt-keywords'.
873 *** New option `ruby-align-chained-calls'.
875 *** More Ruby file types have been added to `auto-mode-alist'.
877 ** Search and Replace
879 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
880 starts a symbol (identifier) incremental search forward with the
881 symbol found near point added to the search string initially.
883 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
884 and adds it to the search string.
886 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
888 *** `query-replace' skips invisible text when `search-invisible' is nil,
889 and opens overlays with hidden text when `search-invisible' is `open'.
891 *** A negative prefix argument of replacement commands replaces backward.
892 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
893 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
895 *** By default, prefix arguments do not now terminate Isearch mode.
896 Set `isearch-allow-prefix' to nil to restore the old behavior.
898 *** More Isearch commands accept prefix arguments, namely
899 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
902 *** Word search now matches whitespace at the beginning/end
903 of the search string if it contains leading/trailing whitespace.
904 In an incremental word search or when using a non-nil LAX argument
905 of `word-search-regexp', the lax matching can also match part of
906 the first word (in addition to the lax matching of the last word).
907 The same rules are now applied to the symbol search, with the difference
908 that it matches symbols, and non-symbol characters between symbols.
910 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
912 ** The shell.el option `explicit-bash-args' includes --noediting by default.
913 All non-ancient Bash versions support this option.
917 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
919 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
923 *** You can customize the SMIE indentation of a mode via `smie-config'.
924 The command `smie-config-guess' can help you derive the appropriate
925 indentation settings, if you provide it with an indented sample file.
926 Use `smie-config-save' to save the result.
928 *** You can customize the SMIE indentation of a file by adding an entry to
929 the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
931 *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
935 *** Improved login monitoring and appropriate response to login failures.
936 New variable `sql-login-delay' defines maximum wait time for a connection.
939 SQL*Plus script placeholders are properly highlighted and identified
940 in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
941 are passed before the logon parameter, as required. The default now
942 includes `-L', to limit the number of logon attempts per invocation.
944 ** New Term mode option `term-suppress-hard-newline'.
946 ** Todo mode has been rewritten and enhanced.
947 The Todo mode user manual describes all commands and most user
948 options. To support some of these features, a new file format is
949 used, which is incompatible with the old format; however, you can
950 convert old todo and done item files to the new format on initializing
951 the first new todo file, or at any later time with the provided
952 conversion command. The previous version of todo-mode.el has been
953 renamed to otodo-mode.el and is now obsolete. New features include:
955 *** Support for multiple todo files and archive files of done items.
957 *** Renaming, reordering, moving, merging, and deleting categories.
959 *** Sortable tabular summaries of categories and the item types they contain.
961 *** Cross-category lists of items filtered by specific criteria.
963 *** More fine-grained interaction with the Emacs diary, by being able to
964 decide for each todo item whether it appears in the Fancy Diary display.
966 *** Highly flexible new item insertion and item editing.
968 *** Moving items between categories, storing done items in their category
969 or in archive files, undoing or unarchiving done items.
971 *** Reprioritizing items by inputting a numerical priority.
973 *** Extensive customizability of operation and display, including many faces.
977 *** `trace-function' and `trace-function-background' no longer prompt for
978 the output buffer. Unless you use a prefix argument, they output to
981 *** With a prefix argument, `trace-function' and `trace-function-background'
982 will prompt for a "context". This is a Lisp expression, whose value at the
983 time the function is entered/exited is printed along with the function's
988 *** New connection method "adb", which allows to access Android
989 devices by the Android Debug Bridge. The variable `tramp-adb-program'
990 can be used to adapt the path of the "adb" program, if needed.
992 *** Handlers for `file-acl' and `set-file-acl' for remote machines
993 that support POSIX ACLs.
995 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
996 for remote machines that support filesystem notifications.
998 *** The experimental url syntax for remote file names has been removed.
1000 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1001 "scpc" and "rsyncc" are discontinued. The ssh option
1002 "ControlMaster=auto" is set automatically in all ssh-based methods,
1003 when possible. See `tramp-use-ssh-controlmaster-options'.
1005 ** New URL command `url-cookie-list' displays the current cookies,
1006 and allows you to interactively remove cookies.
1008 ** VC and related modes
1010 *** In VC directory mode, `D' displays diffs between VC-controlled
1011 whole tree revisions.
1013 *** In VC directory mode, `L' lists the change log for the current VC
1014 controlled tree in a window.
1016 *** In VC directory mode, `I' shows a log of changes that will be
1017 received with a pull operation.
1019 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1020 under current version control system. When called with a prefix
1021 argument, you can remove a file from the ignored file list.
1025 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1027 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1029 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1030 are obsolete. Customize the `woman-*' faces instead.
1032 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
1034 ~/.emacs.d/timelog replaces ~/.timelog
1035 ~/.emacs.d/vip replaces ~/.vip
1036 ~/.emacs.d/viper replaces ~/.viper
1037 ~/.emacs.d/ido.last replaces ~/.ido.last
1038 ~/.emacs.d/kkcrc replaces ~/.kkcrc
1039 ~/.emacs.d/quickurls replaces ~/.quickurls
1040 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
1041 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
1042 ~/.emacs.d/places replaces ~/.emacs-places
1043 ~/.emacs.d/shadows replaces ~/.shadows
1044 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
1045 ~/.emacs.d/strokes replaces ~/.strokes
1046 ~/.emacs.d/notes replaces ~/.notes
1047 ~/.emacs.d/type-break replaces ~/.type-break
1048 Also the following files used by the now obsolete otodo-mode.el:
1049 ~/.emacs.d/todo-do replaces ~/.todo-do
1050 ~/.emacs.d/todo-done replaces ~/.todo-done
1051 ~/.emacs.d/todo-top replaces ~/.todo-top
1053 ** Obsolete packages
1055 *** iswitchb.el; use icomplete-mode.
1057 *** longlines.el; use visual-line-mode.
1063 *** terminal.el; use term.el instead.
1065 *** the old version of todo-mode.el (renamed to otodo-mode.el).
1067 *** xesam.el (owing to the cancellation of the XESAM project).
1069 *** yow.el; use fortune.el or cookie1.el instead.
1072 * New Modes and Packages in Emacs 24.4
1074 ** New package eww.el provides a built-in web browser.
1075 This requires Emacs to have been compiled with libxml2 support.
1077 ** New package nadvice.el offers lighter-weight advice facilities.
1080 *** `add-function'/`remove-function', which can be used to add/remove code on
1081 any function-carrying place, such as process filters or `<foo>-function' hooks.
1083 *** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
1084 function, much like `defadvice' does.
1086 ** New package frameset.el provides a set of operations to save a frameset
1087 (the state of all or a subset of the existing frames and windows, somewhat
1088 similar to a frame configuration), both in-session and persistently, and
1089 restore it at some point in the future.
1091 ** New package filenotify.el provides an interface for file system
1092 notifications. It requires that Emacs be compiled with one of the
1093 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1095 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1096 display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1097 this replaces the string "lambda" with the Greek lambda character.
1099 ** New minor mode `superword-mode', which overrides the default word motion
1100 commands to treat "symbol_words" as a single word, similar to what
1101 `subword-mode' does.
1104 * Incompatible Lisp Changes in Emacs 24.4
1106 ** The default file coding for Emacs Lisp files is now utf-8.
1107 (See `file-coding-system-alist'.) In most cases, this change is
1108 transparent, but files that contain unusual characters without
1109 specifying an explicit coding system may fail to load with obscure
1110 errors. You should either convert them to utf-8 or add an explicit
1113 ** Default process filters and sentinels are not nil any more.
1114 Instead they default to a function that does what the nil value used to do.
1116 ** Overlay priority does not have to be nil or a non-negative integer.
1117 Overlay priority can be other kinds of Lisp objects. We didn't yet
1118 decide whether other types of values are stable enough, and therefore
1119 don't feel it's right to document them. For now, don't assume in your
1120 code that the values of overlay priority can only be either nil or an
1121 integer, always test them with an appropriate predicate to be one or
1122 the other. If you need to sort arbitrary overlays into priority
1123 order, `overlays-at' can now optionally do this.
1124 You should still only specify integer priorities on overlays you create.
1126 ** The cars of the elements in `interpreter-mode-alist' are now
1127 treated as regexps rather than literal strings.
1129 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1130 It used to disable the minor mode, major mode, and text-property keymaps,
1131 whereas now it simply has higher precedence.
1133 ** `kill-region' has lost its `yank-handler' optional argument.
1135 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1136 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1138 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1140 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1141 Some languages match those as »...«, and others as «...», so it is
1142 better for Emacs to stay neutral by default.
1144 ** `read-event' does not return decoded chars in ttys any more.
1145 As was the case in Emacs 22 and before, the decoding of terminal
1146 input, according to `keyboard-coding-system', is not performed in
1147 `read-event' any more. But unlike in Emacs 22, this decoding is still
1148 done before `input-decode-map', `function-key-map', etc.
1150 ** In `symbol-function', nil and "unbound" are indistinguishable.
1151 `symbol-function' does not signal a `void-function' error any more.
1152 To determine if a symbol's function definition is void, use `fboundp'.
1154 ** `defadvice' does not honor the `freeze' flag and cannot advise
1155 special-forms any more.
1157 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1158 when lexical binding is enabled. Previously, VAR was bound to nil,
1159 which often led to spurious unused-variable warnings.
1161 ** The return value of `backup-buffer' has changed.
1162 The second argument is no longer an SELinux context, instead it is an
1163 alist of extended attributes as returned by the new function
1164 `file-extended-attributes'. The attributes can be applied to another
1165 file using `set-file-extended-attributes'.
1167 ** By default `copy-file' no longer copies file permission bits to an
1168 existing destination; and it sets the file permission bits of a newly
1169 created destination to those of the source, masked by the default file
1170 permissions. To copy the file permission bits, pass t as the
1171 PRESERVE-PERMISSIONS argument of `copy-file'.
1173 ** `visited-file-modtime' now returns -1 for nonexistent files.
1174 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1175 in the presence of files with negative time stamps.
1177 ** Frame-local variables that affect redisplay do not work any more.
1178 More specifically, redisplay does not bother to check for a frame-local
1179 value when looking up variables.
1181 ** In compiled Lisp files, the header no longer includes a timestamp.
1183 ** The option `inhibit-local-menu-bar-menus' has been removed.
1186 * Lisp Changes in Emacs 24.4
1188 ** Change to the Emacs Lisp coding conventions: the package descriptor
1189 and name of global variables, constants, and functions should be separated
1190 by two hyphens if the symbol is not meant to be used by other packages.
1192 ** The second argument of `eval' can now specify a lexical environment.
1194 ** New macro `define-alternatives' can be used to define generic commands.
1195 Generic commands are interactive functions whose implementation can be
1196 selected among several alternatives, as a matter of user preference.
1198 ** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1200 ** New functions `special-form-p' and `macrop'.
1202 ** New macro `with-eval-after-load'.
1203 This is like the old `eval-after-load', but better behaved.
1205 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1206 on that symbol will use the associated value as a function to call
1209 ** New variable `enable-dir-local-variables'.
1210 Directory-local variables are ignored if this is nil. This may be
1211 useful for modes that want to ignore directory-locals while still
1212 respecting file-local variables.
1214 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1215 as a function to call to provide default values.
1217 ** New functions `group-gid' and `group-real-gid'.
1219 ** New function `get-pos-property'.
1221 ** New hook `pre-redisplay-function'.
1223 ** `byte-compile-interactive-only-functions' is now obsolete.
1224 To specify that a command should only be called interactively, give it
1225 a non-nil `interactive-only' property.
1227 ** New function `string-suffix-p'.
1229 ** `split-string' now takes an optional argument TRIM.
1230 The value, if non-nil, is a regexp that specifies what to trim from
1231 the start and end of each substring.
1235 *** The separator used by `completing-read-multiple' is now a regexp.
1236 The default `crm-separator' has been changed to allow surrounding spaces
1239 *** New function `completion-table-with-cache' is a wrapper for
1240 `completion-table-dynamic' that caches the result of the last lookup.
1242 *** New function `completion-table-merge' to combine several
1243 completion tables by merging their completions.
1245 *** The `common-substring' argument of `display-completion-list',
1246 which has been documented as obsolete since Emacs 23.1, is now _really_
1247 obsolete, and no longer advertised. Instead either call
1248 `completion-hilit-commonality' to add the highlighting; or use
1249 `completion-all-completions', which returns highlighted strings.
1251 ** Encoding and decoding of text
1253 *** New coding-system `prefer-utf-8'.
1254 This is like `undecided' but prefers UTF-8 on decoding if the text to
1255 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1256 any non-ASCII characters are automatically encoded as UTF-8.
1258 *** New attributes of coding-systems whose type is `undecided'.
1259 Two new attributes, `:inhibit-null-byte-detection' and
1260 `:inhibit-iso-escape-detection', determine how to detect encoding of
1261 text that includes null bytes and ISO-2022 escape sequences, respectively.
1262 Each of these attributes can be either nil, zero, or t. If t, decoding
1263 text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1264 null bytes cause text to be decoded with no-conversion, and ISO-2022
1265 sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1266 encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1267 `inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1268 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1269 UTF-8 encoding and decoding, whenever possible.
1271 These attributes are only meaningful for coding-systems of type `undecided'.
1272 (The type of a coding-system is determined by its `:coding-type' attribute
1273 and can be accessed by calling the `coding-system-type' function.)
1277 *** New function `define-error'.
1279 *** `with-demoted-errors' takes an additional argument `format'.
1283 *** Face specs set via Custom themes now replace the `defface' spec
1284 rather than inheriting from it. In other words, setting a face via a
1285 theme now behaves like setting it via Customize: you only need to
1286 specify the attributes that you want, you don't need to unset those
1287 that you don't want.
1289 *** The function `face-spec-set' is now like `setq' for face specs.
1290 Its third arg now accepts values specifying a face spec type (defface,
1291 custom, or override spec), and the relevant spec is set accordingly.
1293 *** New face spec attribute :distant-foreground
1294 specifies foreground to use if background color is near the foreground
1295 color that would otherwise have been used.
1297 *** New function `add-face-text-property', which can be used to
1298 conveniently prepend/append new face properties.
1300 *** New face characteristic (supports :underline (:style wave))
1301 specifies whether or not the terminal can display a wavy line.
1305 *** Support for filesystem notifications.
1306 Emacs now supports notifications of filesystem changes, such as
1307 creation, modification, and deletion of files. This requires the
1308 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1309 MS-Windows systems, this is supported for Windows XP and newer.
1311 *** The 9th element returned by `file-attributes' is now unspecified.
1312 Formerly, it was t if the file's gid would change if file were deleted
1313 and recreated. This value has been inaccurate for years on many
1314 platforms, and nobody seems to have noticed or cared.
1316 *** The 6th argument to `copy-file' has been renamed to
1317 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1318 Unix file permission bits as well as SELinux context.
1320 *** The function `file-ownership-preserved-p' now has an optional
1321 argument GROUP which causes it check for file group too. This can be
1322 used in place of the 9th element of `file-attributes'.
1324 *** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1325 with the same interpretation as the returned value of `visited-file-modtime'.
1329 *** `image-animated-p' is now `image-multi-frame-p'.
1330 It returns non-nil for any image that contains multiple frames,
1331 whether or not it specifies a frame delay.
1333 *** New variable `image-default-frame-delay' gives the frame delay for
1334 animated images which do not specify a frame delay.
1336 *** New functions `image-current-frame' and `image-show-frame' for getting
1337 and setting the current frame of a multi-frame image.
1341 *** ImageMagick images now support the :max-width and :max-height keywords.
1343 *** When using `create-image' with image data, you can pass a :format
1344 attribute (via the property-list argument) in order to help
1345 ImageMagick detect the image type. The value should be a MIME
1346 content-type that is found in the new variable `image-format-suffixes'.
1348 ** Revert and Autorevert
1350 *** If Emacs is compiled with file notification support, it uses notifications
1351 instead of checking file time stamps. To disable this, set the user option
1352 `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1353 expression matching directories to be excluded from file notifications via
1354 `auto-revert-notify-exclude-dir-regexp'.
1356 *** The default values of `buffer-stale-function', `revert-buffer-function',
1357 and `revert-buffer-insert-file-contents-function' are no longer nil.
1358 Instead they default to functions that do what the nil value used to.
1360 *** `buffer-stale-function' is now used for buffers visiting files too.
1362 *** The new user option `auto-revert-remote-files' enables reversion
1363 of remote files, if non-nil.
1367 *** Functions to pop up menus and dialogs now work on all terminals,
1368 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1369 `message-box', `yes-or-no-p', etc.
1371 The function `display-popup-menus-p' will now return non-nil for a
1372 display or frame whenever a mouse is supported on that display or frame.
1374 *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1376 *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1377 to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1379 ** Minor internal changes to the details of lock files.
1380 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1381 If DIR/.#FILE already exists and is not an Emacs lock file,
1382 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1383 numbered lock files DIR/.#FILE.0...).
1384 On file systems that do not support symbolic links, the lock is now a
1385 regular file with contents being what would have been in the symlink.
1387 ** New bool-vector set operation functions:
1388 *** `bool-vector-exclusive-or'
1389 *** `bool-vector-union'
1390 *** `bool-vector-intersection'
1391 *** `bool-vector-set-difference'
1392 *** `bool-vector-not'
1393 *** `bool-vector-subsetp'
1394 *** `bool-vector-count-consecutive'
1395 *** `bool-vector-count-population'
1397 ** New library subr-x.el with miscellaneous small utility functions:
1398 *** `hash-table-keys'
1399 *** `hash-table-values'
1400 *** `string-blank-p'
1401 *** `string-empty-p'
1403 *** `string-reverse'
1404 *** `string-trim-left'
1405 *** `string-trim-right'
1407 *** `string-remove-prefix'
1408 *** `string-remove-suffix'
1410 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1412 ** The spelling of the rx.el category `chinese-two-byte' has been
1413 corrected (the first 'e' was missing).
1415 ** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1416 *** object-name -> eieio-object-name
1417 *** object-class -> eieio-object-class
1418 *** object-class-fast -> eieio--object-class
1419 *** object-class-name -> eieio-object-class-name
1420 *** object-name-string -> eieio-object-name-string
1421 *** object-num-slots -> eieio--object-num-slots
1422 *** object-set-name-string -> eieio-object-set-name-string
1423 *** class-of -> eieio-object-class
1424 *** class-name -> eieio-class-name
1425 *** class-parent -> eieio-class-parent
1426 *** class-parents -> eieio-class-parents
1427 *** class-parents-fast -> eieio-class-parents-fast
1428 *** class-children -> eieio-class-children
1429 *** class-num-slots -> eieio--class-num-slots
1430 *** class-precedence-list -> eieio-class-precedence-list
1431 *** class-direct-subclasses -> eieio-class-children
1432 *** class-direct-superclasses -> eieio-class-parents
1434 ** Obsoleted functions
1437 *** `lisp-complete-symbol'
1438 *** `field-complete'
1439 *** `minibuffer-completion-contents'
1440 *** `isearch-nonincremental-exit-minibuffer'
1441 *** `isearch-filter-visible'
1442 *** `generic-make-keywords-list'
1443 *** `get-upcase-table' (use `case-table-get-table' instead).
1445 ** `with-wrapper-hook' is obsoleted by `add-function'.
1446 The few hooks that used with-wrapper-hook are replaced as follows:
1447 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1448 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1449 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1452 * Changes in Emacs 24.4 on Non-Free Operating Systems
1454 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1455 To use the old font backend, use the following on the command line:
1456 % defaults write org.gnu.Emacs FontBackend ns
1457 GNUstep and Mac OS X 10.4 use the old font backend.
1459 ** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1460 default fullscreen method is now "native" fullscreen. To use the
1461 old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1463 ** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1464 by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1465 Note that this does not apply to images.
1467 ** The procedure for building Emacs on MS-Windows has changed.
1468 It is now built by running the same configure script as on all other
1469 platforms. This requires the MSYS environment and MinGW development
1470 tools. See the updated instructions in nt/INSTALL for details.
1472 Using the Posix configure script and Makefiles also means a change in
1473 the directory structure of the Emacs installation on Windows. It is
1474 now the same as on GNU and Unix systems. In particular, the auxiliary
1475 programs, such as cmdproxy.exe and hexl.exe, are in
1476 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1477 version), version-independent site-lisp is in share/emacs/site-lisp,
1478 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1479 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1480 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1481 directories and will find the files in there automatically; there's no
1482 need to set any variables due to this change.)
1484 ** Emacs on Windows 2000 and later can now access files and directories
1485 whose names cannot be encoded in the current system codepage.
1487 The new variable `w32-unicode-filenames' controls this feature: if it
1488 is t, Emacs uses Unicode APIs to pass file names to system calls,
1489 which lifts the limitation of file names to the current locale.
1491 ** Lock files now work on MS-Windows.
1492 This helps to prevent losing your edits if the same file is being
1493 edited in another Emacs session or by another user. See the node
1494 "Interlocking" in the Emacs User Manual for the details. To disable
1495 file locking, customize `create-lockfiles' to nil.
1497 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1498 The backtrace is written to the 'emacs_backtrace.txt' file in the
1499 directory where Emacs was running.
1501 ** The variable `buffer-file-type' is no longer supported.
1502 Setting it has no effect, and %t in the mode-line format is ignored.
1503 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1504 modifying it has no effect.
1507 * Installation Changes in Emacs 24.3
1509 ** The default X toolkit is now Gtk+ version 3.
1510 If you don't pass `--with-x-toolkit' to configure, or if you use
1511 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1512 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1513 You can explicitly require a specific version by passing
1514 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1516 ** New configure option `--enable-link-time-optimization', to utilize
1517 an appropriate feature provided by GCC since version 4.5.0.
1519 ** New configure option `--without-all' to disable most of the optional
1520 features (image support, etc.) that are normally enabled by default.
1522 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1523 Emacs). If building with GCC, this enables compile-time checks that
1524 warn/give errors about possibly-questionable C code. On a recent GNU
1525 system there should be no warnings; on older and on non-GNU systems
1526 the results may be useful to developers.
1528 ** The configure option `--enable-use-lisp-union-type' has been
1529 renamed to `--enable-check-lisp-object-type', as the resulting
1530 Lisp_Object type no longer uses a union to implement the compile time
1531 check that this option enables.
1533 ** The configure option `--disable-maintainer-mode' has been removed,
1534 as it was confusingly-named and rarely useful.
1536 ** The configure options `--program-prefix', `--program-suffix', and
1537 `--program-transform-name' apply to more than just the installed
1538 binaries. Now they also affect the man pages, icons, and the
1539 etc/emacs.desktop file; but not the info pages, since this would break
1540 links between the various manuals.
1542 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1543 overwriting "emacs" in the installation bin/ directory with a link
1546 ** Emacs uses libtinfo in preference to libncurses, if available.
1548 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1549 /usr/pkg/lib to the linker search path. You must add them yourself if
1552 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1553 (from the bin and libexec directories, respectively). The former is
1554 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1557 * Startup Changes in Emacs 24.3
1559 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1560 lisp/ directory. There should not be any there anyway. If you have
1561 been adding them there, put them somewhere else; e.g., site-lisp.
1563 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1566 * Changes in Emacs 24.3
1570 *** `C-h f' (`describe-function') can now perform autoloading.
1571 When this command is called for an autoloaded function whose docstring
1572 contains a key substitution construct, that function's library is
1573 automatically loaded, so that the documentation can be shown
1574 correctly. To disable this, set `help-enable-auto-load' to nil.
1576 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1577 even after their associated libraries have been loaded (and the
1578 autoloads have been redefined as functions).
1582 *** Images displayed via ImageMagick now support transparency and the
1583 :background image specification property.
1585 *** When available, ImageMagick support is automatically enabled.
1586 It is no longer necessary to call `imagemagick-register-types'
1587 explicitly to install ImageMagick image types; that function is called
1588 automatically at startup, or when customizing an imagemagick- option.
1590 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1591 ImageMagick to view images. (You must call `imagemagick-register-types'
1592 afterwards if you do not use customize to change this.)
1594 *** The new variable `imagemagick-enabled-types' also affects which
1595 ImageMagick types are treated as images. The function
1596 `imagemagick-filter-types' returns the list of types that will be
1601 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1602 next and previous path separator, respectively.
1604 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1605 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1606 non-nil before enabling the mode.
1610 *** New option `mode-line-default-help-echo' specifies the help text
1611 (shown in a tooltip or in the echo area) for any part of the mode line
1612 that does not have its own specialized help text.
1614 *** You can now click mouse-3 in the coding system indicator to invoke
1615 `set-buffer-file-coding-system'.
1617 ** Server and client
1619 *** emacsclient now obeys string values for `initial-buffer-choice',
1620 if it is told to open a new frame without specifying any file to visit
1621 or expression to evaluate.
1623 *** New option `server-auth-key' specifies a shared server key.
1625 ** Emacs now generates backtraces on fatal errors.
1626 On encountering a fatal error, Emacs now outputs a textual description
1627 of the fatal signal, and a short backtrace on platforms like glibc
1628 that support backtraces.
1630 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1631 This minor mode replaces `toggle-read-only', which is now obsolete.
1633 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1634 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1635 respectively, without exiting from the prompt.
1637 ** In the Package Menu, newly-available packages are listed as "new",
1638 and sorted above the other "available" packages by default.
1640 ** If your Emacs was built from a repository checkout, the new variable
1641 `emacs-bzr-version' contains information about the bzr revision used.
1643 ** New option `create-lockfiles' specifies usage of lockfiles.
1644 It defaults to t. Changing it to nil inhibits the creation of lock
1645 files (use this with caution).
1647 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1648 variables on remote hosts.
1650 ** The entry for PCL-CVS has been removed from the Tools menu.
1651 The PCL-CVS commands are still available via the keyboard.
1653 ** Using "unibyte: t" in Lisp source files is obsolete.
1654 Use "coding: raw-text" instead.
1656 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1657 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1658 The previous binding, introduced in Emacs 24.1, was a mistake, because
1659 `C-c LETTER' bindings are reserved for user customizations.
1661 ** Internationalization
1663 *** New language environment: Persian.
1665 *** New input method `vietnamese-vni'.
1667 ** Nextstep (GNUstep / Mac OS X) port
1669 *** Support for fullscreen and the frame parameter fullscreen.
1671 *** A file dialog is used for open/save operations initiated from the
1675 * Editing Changes in Emacs 24.3
1677 ** Search and Replace
1679 *** Non-regexp Isearch now performs "lax" space matching.
1680 Each sequence of spaces in the supplied search string may match any
1681 sequence of one or more whitespace characters, as specified by the
1682 variable `search-whitespace-regexp'. (This variable is also used by a
1683 similar existing feature for regexp Isearch.)
1685 *** New Isearch command `M-s SPC' toggles lax space matching.
1686 This applies to both ordinary and regexp Isearch.
1688 *** New option `replace-lax-whitespace'.
1689 If non-nil, `query-replace' uses flexible whitespace matching too.
1692 *** Global `M-s _' starts a symbol (identifier) incremental search,
1693 and `M-s _' in Isearch toggles symbol search mode.
1694 `M-s c' in Isearch toggles search case-sensitivity.
1696 ** Navigation commands
1698 *** New binding `M-g c' for `goto-char'.
1700 *** New binding `M-g TAB' for `move-to-column'.
1702 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1703 interactively with no prefix arg. Previously, it moved to column 1.
1705 ** New option `yank-handled-properties' allows processing of text
1706 properties on yanked text, in ways that are more general than just
1707 removing them (as is done by `yank-excluded-properties').
1709 ** New option `delete-trailing-lines' specifies whether
1710 M-x delete-trailing-whitespace should delete trailing lines at the end
1711 of the buffer. It defaults to t.
1713 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1715 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1716 `ucs-insert' is now an obsolete alias for `insert-char'.
1718 ** The `z' key no longer has a binding in most special modes.
1719 It used to be bound to `kill-this-buffer', but `z' is too easy to
1722 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1723 It copies the region-rectangle as the last rectangle kill.
1727 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1729 *** New option `register-separator' specifies the register containing
1730 the text to put between collected texts for use with
1731 M-x append-to-register and M-x prepend-to-register.
1734 * Changes in Specialized Modes and Packages in Emacs 24.3
1736 ** Common Lisp emulation (CL)
1738 *** CL's main entry is now (require 'cl-lib).
1739 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1740 i.e., all its definitions have the "cl-" prefix (and internal definitions
1741 use the "cl--" prefix).
1743 If `cl' provided a feature under the name `foo', then `cl-lib'
1744 provides it under the name `cl-foo' instead; with the exceptions of the
1745 few `cl' definitions that had to use `foo*' to avoid conflicts with
1746 pre-existing Elisp entities. These have been renamed to `cl-foo'
1747 rather than `cl-foo*'.
1749 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1750 provide the old, non-prefixed names. Some exceptions are listed below:
1752 *** `cl-flet' is not like `flet' (which is deprecated).
1753 Instead it obeys the behavior of Common-Lisp's `flet'.
1754 In particular, in cl-flet function definitions are lexically scoped,
1755 whereas in flet the scoping is dynamic.
1757 *** `cl-labels' is slightly different from `labels'.
1758 The difference is that it relies on the `lexical-binding' machinery
1759 (as opposed to the `lexical-let' machinery used previously) to capture
1760 definitions in closures, so such closures will only work if `lexical-binding'
1763 *** `cl-letf' is not exactly like `letf'.
1764 The only difference is in details that relate to some deprecated usage
1765 of `symbol-function' in place forms.
1767 *** `progv' was rewritten to use the `let' machinery.
1768 A side effect is that variables without corresponding values are bound
1769 to nil rather than being made unbound.
1771 *** The following methods of extending `setf' are obsolete
1772 (use features from gv.el instead):
1773 `define-modify-macro' (use `gv-letplace')
1774 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1775 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1776 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1780 *** Changes are now highlighted using the same color scheme as in
1781 modern VCSes. Deletions are displayed in red (new faces
1782 `diff-refine-removed' and `smerge-refined-removed', and new definition
1783 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1784 and `smerge-refined-added', and new definition of `diff-added').
1786 *** The variable `diff-use-changed-face' defines whether to use the
1787 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1788 changes in context diffs.
1790 *** The new command `diff-delete-trailing-whitespace' removes trailing
1791 whitespace introduced by a diff.
1793 ** Ediff now uses the same color scheme as Diff mode.
1797 A new version of python.el, which provides several new features, including:
1798 per-buffer shells, better indentation, Python 3 support, and improved
1799 shell-interaction compatible with iPython (and virtually any other
1802 *** Some user options have been replaced/renamed, including (old -> new):
1803 **** python-indent -> python-indent-offset
1804 **** python-guess-indent -> python-indent-guess-indent-offset
1805 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1806 **** python-use-skeletons -> python-skeleton-autoinsert
1808 *** Some user options have been removed, including:
1810 **** `python-indent-string-contents': Strings are never indented.
1812 **** `python-honour-comment-indentation':
1813 Comments are always considered as indentation markers.
1815 **** `python-continuation-offset': Indentation is automatically
1816 calculated in a pep8 compliant way depending on the context.
1818 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1819 Have no direct mapping as the shell interaction is completely different.
1821 **** `python-python-command', `python-jython-command':
1822 Replaced by `python-shell-interpreter'.
1824 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1825 `python-pdbtrack-minor-mode-string', `python-source-modes':
1828 *** Some commands have been replaced (old -> new):
1829 **** python-insert-class -> python-skeleton-class
1830 **** python-insert-def -> python-skeleton-def
1831 **** python-insert-for -> python-skeleton-for
1832 **** python-insert-if -> python-skeleton-if
1833 **** python-insert-try/except -> python-skeleton-try
1834 **** python-insert-try/finally -> python-skeleton-try
1835 **** python-insert-while -> python-skeleton-while
1836 **** python-find-function -> python-nav-jump-to-defun
1837 **** python-next-statement -> python-nav-forward-sentence
1838 **** python-previous-statement -> python-nav-backward-sentence
1839 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1840 **** python-end-of-defun-function -> python-nav-end-of-defun
1841 **** python-send-buffer -> python-shell-send-buffer
1842 **** python-send-defun -> python-shell-send-defun
1843 **** python-send-region -> python-shell-send-region
1844 **** python-send-region-and-go -> emulate with python-shell-send-region
1845 and python-shell-switch-to-shell
1846 **** python-send-string -> python-shell-send-string
1847 **** python-switch-to-python -> python-shell-switch-to-shell
1848 **** python-describe-symbol -> python-eldoc-at-point
1852 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1854 *** The D-Bus object manager interface is implemented.
1856 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1857 if their value does not fit into Emacs's integer range.
1859 *** The function `dbus-call-method' is now non-blocking.
1860 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1862 *** Signals can also be sent as unicast messages.
1864 *** The argument list of `dbus-register-signal' has been extended,
1865 according to the new match rule types of D-Bus.
1867 *** `dbus-init-bus' supports private connections.
1869 *** There is a new function `dbus-setenv'.
1871 ** `desktop-path' no longer includes the "." directory.
1872 Desktop files are now located in ~/.emacs.d by default.
1876 *** `dired-do-async-shell-command' executes each file sequentially
1877 if the command ends in `;' (when operating on multiple files).
1878 Otherwise, it executes the command on each file in parallel.
1880 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1881 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1884 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1885 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1886 mark/unmark/flag all files in the active region.
1888 *** The minibuffer default for `=' (`dired-diff') has changed.
1889 It is now the backup file for the file at point, if one exists.
1890 In Transient Mark mode the default is the file at the active mark.
1892 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1893 The global binding for `M-=', `count-words-region' is in effect.
1897 *** New module "notifications", which can send a notification when you
1898 receive a private message or your nickname is mentioned.
1900 *** ERC will look up server/channel names via auth-source and use any
1903 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1904 only applies to messages sent by lurkers.
1906 ** reStructuredText mode
1908 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1909 fontification, comment handling, and customization have all been revised
1912 *** Support for `imenu' and `which-function-mode'.
1914 *** The reStructuredText syntax is more closely covered.
1915 Sphinx support has been improved.
1917 *** `rst-insert-list' inserts new list or continues existing lists.
1919 *** A negative prefix argument always works for `rst-adjust'.
1921 *** The window configuration is reset after displaying a TOC.
1923 *** The constant `rst-version' describes the rst.el package version.
1927 *** Support for percent literals and recognition of regular expressions
1928 in method calls without parentheses with more methods, including Cucumber
1931 *** Improved syntax highlighting and indentation.
1933 *** New command `ruby-toggle-block', bound to `C-c {'.
1935 *** Some non-standard keybindings/commands have been removed:
1937 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1939 **** `ruby-mark-defun'; use `mark-defun'.
1941 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1942 appropriate settings for the variables `beginning-of-defun-function'
1943 and `end-of-defun-function'.
1945 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1946 `reindent-then-newline-and-indent' and `newline' have been removed.
1948 ** Shell Script mode
1950 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1952 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1954 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1958 *** The free software compiler GHDL is supported (and now the default).
1960 *** Support for the VHDL-AMS packages has been added/updated.
1962 *** Updated to the 2002 revision of the VHDL standard.
1964 *** Accepts \r and \f as whitespace.
1968 *** The faces used by Apropos are now directly customizable.
1969 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1970 see the `apropos' Custom group for details.
1972 *** The old options whose values specified faces to use have been removed
1973 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1974 `apropos-match-face' and `apropos-property-face'.).
1978 *** This package has been rewritten to use Tabulated List mode.
1980 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1981 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1985 *** Algebraic simplification mode is now the default.
1986 To restrict to the limited simplifications given by the former
1987 default simplification mode, use `m I'.
1991 *** You can customize the header text that appears above each calendar month.
1992 See the variable `calendar-month-header'.
1994 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1996 *** The calendars produced by cal-html include holidays.
1997 Customize `cal-html-holidays' to change this.
2001 *** The major modes from the parser generators "Bovine" and "Wisent"
2002 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2003 are in `auto-mode-alist', and the corresponding manuals are included.
2007 **** Menu support for the "Configuration" feature. This allows users to
2008 choose the active configuration (such as debug or install) from the menu.
2010 **** New command `ede-set' to interactively set project-local variables.
2012 **** Support for compiling, debugging, and running in "generic" projects.
2014 **** Autoconf editing support for M4 macros with complex arguments.
2016 **** Compilation support for the "linux" project type.
2018 **** "simple" projects have been removed; use "generic" projects instead.
2022 **** Support for parsing #include statements inside a namespace in C/C++.
2024 **** Improved support for 'extern "C"' declarations in C/C++.
2026 **** The ability to ignore more common special C/C++ preprocessor symbols,
2027 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2028 If available, include cdefs.h as an additional source of preprocessor symbols.
2030 **** Improved C/C++ function pointer parsing.
2032 **** In Python, support for converting imports to include file names.
2034 **** Ability to dynamically determine the Python load path.
2036 **** Support for the Python 'WITH' and 'AT' keywords.
2038 **** Improved tooltip completion.
2042 **** The SRecode manual is now included.
2044 **** Tag generation supports constructor/destructor settings and system
2045 include differentiation.
2047 **** Addition of 'Framework' support: Frameworks are specified when a
2048 particular kind of library (such as Android) is needed in a common language
2051 **** Support for nested templates and let variables override based on priority.
2053 **** Support for merging tables from multiple related modes, such as
2054 default -> c++ -> arduino.
2056 ** Compile has a new option `compilation-always-kill'.
2060 *** `custom-reset-button-menu' now defaults to t.
2062 *** Non-option variables are never matched in `customize-apropos' and
2063 `customize-apropos-options' (i.e., the prefix argument does nothing for
2064 these commands now).
2068 *** The variables `term-default-fg-color' and `term-default-bg-color'
2069 are now deprecated in favor of the customizable face `term'.
2071 *** You can customize how to display ANSI terminal colors and styles
2072 by customizing the corresponding `term-color-<COLOR>',
2073 `term-color-underline' and `term-color-bold' faces.
2077 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2079 *** Remote processes are now also supported on remote MS-Windows hosts.
2083 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2084 Previously, this slot stored semicolon-separated attribute-value pairs
2085 appended to some imap URLs, but this is not compatible with RFC 3986.
2086 So now the `filename' slot stores the entire path and query components,
2087 and the `attributes' slot is always nil.
2089 *** New function `url-encode-url' for encoding a URI string.
2090 The `url-retrieve' function now uses this to encode its URL argument,
2091 in case that is not properly encoded.
2093 ** notifications.el supports now version 1.2 of the Notifications API.
2094 The function `notifications-get-capabilities' returns the supported
2097 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2098 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2099 `flymake-warning-bitmap'.
2101 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2102 specifying URL types that should be converted to remote file names at
2103 the FFAP prompt. The default is now '("ftp").
2105 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2106 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2108 ** New option `mouse-avoidance-banish-position' specifies where the
2109 `banish' mouse avoidance setting moves the mouse.
2111 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2112 closing brackets to be aligned with the line of the opening bracket.
2114 ** In Proced mode, new command `proced-renice' renices marked processes.
2116 ** New option `async-shell-command-buffer' specifies the buffer to use
2117 for a new asynchronous `shell-command' when the default output buffer
2118 `*Async Shell Command*' is already in use.
2120 ** SQL mode has a new option `sql-db2-escape-newlines'.
2121 If non-nil, newlines sent to the command interpreter will be escaped
2122 by a backslash. The default does not escape the newlines and assumes
2123 that the sql statement will be terminated by a semicolon.
2125 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2126 (and modes that derive from it), sorts the column at point, or the Nth
2127 column if a numeric prefix argument is given.
2129 ** `which-func-modes' now defaults to t, so Which Function mode, when
2130 enabled, applies to all applicable major modes.
2132 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2135 ** Follow mode no longer works by using advice.
2136 The option `follow-intercept-processes' has been removed.
2138 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2140 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2141 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2142 *** semantic-change-hooks -> semantic-change-functions
2143 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2144 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2145 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2146 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2147 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2148 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2149 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2150 *** rcirc-activity-hooks -> rcirc-activity-functions
2151 *** rcirc-print-hooks -> rcirc-print-functions
2152 *** dbus-event-error-hooks -> dbus-event-error-functions
2153 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2154 *** checkdoc-style-hooks -> checkdoc-style-functions
2155 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2156 *** archive-extract-hooks -> archive-extract-hook
2157 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2158 *** hfy-post-html-hooks -> hfy-post-html-hook
2159 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2160 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2161 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2162 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2164 ** Obsolete packages
2167 In most cases, assoc+member+push+delq work just as well.
2168 And in any case it's just a terrible package: ugly semantics, terrible
2169 inefficiency, and not namespace-clean.
2178 * Incompatible Lisp Changes in Emacs 24.3
2180 ** Docstrings starting with `*' no longer indicate user options.
2181 Only variables defined using `defcustom' are considered user options.
2182 The function `user-variable-p' is now an obsolete alias for
2183 `custom-variable-p'.
2185 ** The return values of `defalias', `defun' and `defmacro' have changed,
2186 and are now undefined. For backwards compatibility, `defun' and
2187 `defmacro' currently return the name of the newly defined
2188 function/macro, but this should not be relied upon.
2190 ** `random' by default now returns a different random sequence in
2191 every Emacs run. Use `(random S)', where S is a string, to set the
2192 random seed to a value based on S, in order to get a repeatable
2193 sequence in later calls.
2195 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2196 that substring is inserted literally even if the LITERAL arg is
2197 non-nil, instead of causing an error to be signaled.
2199 ** `select-window' now always makes the window's buffer current.
2200 It does so even if the window was selected before.
2202 ** The function `x-select-font' can return a font spec, instead of a
2203 font name as a string. Whether it returns a font spec or a font name
2204 depends on the graphical library.
2206 ** `face-spec-set' no longer sets frame-specific attributes when the
2207 third argument is a frame (that usage was obsolete since Emacs 22.2).
2209 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2211 ** The CL package's `get-setf-method' function no longer exists.
2212 Generalized variables are now part of core Emacs Lisp, and implemented
2213 differently to the way cl.el used to do it. It is not possible to
2214 define a compatible replacement for `get-setf-method'. See the file
2215 gv.el for internal details of the new implementation.
2217 ** The arguments of `dbus-register-signal' are no longer just strings,
2218 but keywords or keyword-string pairs. The old argument list will
2219 still be supported for Emacs 24.x.
2221 ** Miscellaneous name changes
2222 Some Lisp symbols have been renamed to correct their spelling,
2223 or to be more consistent with standard Emacs terminology.
2225 *** Renamed functions
2226 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2227 **** inactivate-input-method -> deactivate-input-method
2228 **** quail-inactivate -> quail-deactivate
2229 **** robin-inactivate -> robin-deactivate
2230 **** viper-inactivate-input-method -> viper-deactivate-input-method
2231 **** viper-inactivate-input-method-action ->
2232 viper-deactivate-input-method-action
2233 **** ucs-input-inactivate -> ucs-input-deactivate
2236 The old hooks are still supported for backward compatibility, but they
2237 are deprecated and will be removed eventually.
2238 **** input-method-inactivate-hook -> input-method-deactivate-hook
2239 **** robin-inactivate-hook -> robin-deactivate-hook
2240 **** quail-inactivate-hook -> quail-deactivate-hook
2242 *** Renamed variables
2243 **** follow-deactive-menu -> follow-inactive-menu
2244 **** inactivate-current-input-method-function ->
2245 deactivate-current-input-method-function
2247 ** Some obsolete functions, variables, and faces have been removed:
2248 *** `last-input-char', `last-command-char', `unread-command-char'
2249 *** `facemenu-unlisted-faces'
2250 *** `rmail-decode-mime-charset'
2251 *** `iswitchb-read-buffer'
2252 *** `sc-version', `sc-submit-bug-report'
2253 *** `set-char-table-default'
2254 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2255 *** `compile-internal'
2257 *** `mode-line-inverse-video'
2258 *** `follow-mode-off-hook'
2259 *** `cvs-commit-buffer-require-final-newline'
2260 (use `log-edit-require-final-newline' instead)
2261 *** `cvs-changelog-full-paragraphs'
2262 (use `log-edit-changelog-full-paragraphs' instead)
2263 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2264 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2265 *** `vc-master-templates' (use `vc-handled-backends' instead)
2266 *** `vc-checkout-carefully'
2269 * Lisp Changes in Emacs 24.3
2271 ** CL-style generalized variables are now in core Elisp.
2272 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2273 You can define your own generalized variables using `gv-define-simple-setter',
2274 `gv-define-setter', etc.
2276 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2277 This can significantly speed up execution of non-byte-compiled code,
2278 but can also bump into previously unnoticed cyclic dependencies.
2279 These are generally harmless: they will simply cause the macro calls
2280 to be left for later expansion (as before), but will result in a
2281 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2282 You may wish to restructure your code so this does not happen.
2284 ** New sampling-based Elisp profiler.
2285 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2286 When finished, use M-x profiler-stop. The sampling rate can be based on
2287 CPU time or memory allocations.
2289 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2290 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2292 ** New macros `setq-local' and `defvar-local'.
2294 ** Face underlining can now use a wave.
2296 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2297 of `read-regexp' accepts a string ending with a colon and space, and its
2298 second argument DEFAULTS can be a list of strings accessible via `M-n'
2299 in the minibuffer ahead of other hard-coded useful regexp-related values.
2300 More commands use `read-regexp' now to read their regexp arguments.
2304 *** New function `completion-table-with-quoting' to handle completion
2305 in the presence of quoting, such as file completion in shell buffers.
2307 *** New function `completion-table-subvert' to use an existing completion
2308 table, but with a different prefix.
2312 *** New error type and new function `user-error'.
2313 These do not trigger the debugger.
2315 *** New option `debugger-bury-or-kill', saying what to do with the
2316 debugger buffer when exiting debug.
2318 *** Set `debug-on-message' to enter the debugger when a certain
2319 message is displayed in the echo area. This can be useful when trying
2320 to work out which code is doing something.
2322 *** New var `inhibit-debugger', automatically set to prevent accidental
2323 recursive invocations.
2327 *** New command `fit-frame-to-buffer' adjusts the frame height to
2330 *** The command `fit-window-to-buffer' can adjust the frame height
2331 if the new option `fit-frame-to-buffer' is non-nil.
2333 *** New macro `with-temp-buffer-window', similar to
2334 `with-output-to-temp-buffer'.
2336 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2339 *** New option `switch-to-buffer-preserve-window-point' to restore a
2340 window's point when switching buffers.
2342 *** New display action alist entries `window-height' and `window-width'
2343 specify the size of new windows created by `display-buffer'.
2345 *** New display action alist entry `pop-up-frame-parameters', if
2346 non-nil, specifies frame parameters to give any newly-created frame.
2348 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2349 tells display action functions to avoid changing which frame is
2352 *** New display action alist entry `previous-window', if non-nil,
2353 specifies window to reuse in `display-buffer-in-previous-window'.
2355 *** New display action functions `display-buffer-below-selected',
2356 and `display-buffer-in-previous-window'.
2358 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2359 now accept a third argument to avoid choosing the selected window.
2361 *** Additional values recognized for option `window-combination-limit'.
2363 *** The following variables are obsolete, as they can be replaced by
2364 appropriate entries in the `display-buffer-alist' function introduced
2366 **** `dired-shrink-to-fit'
2367 **** `display-buffer-reuse-frames'
2368 **** `display-buffer-function'
2369 **** `special-display-buffer-names'
2370 **** `special-display-frame-alist'
2371 **** `special-display-function'
2372 **** `special-display-regexps'
2376 *** `current-time-string' no longer requires that its argument's year
2377 must be in the range 1000..9999. It now works with any year supported
2378 by the underlying C implementation.
2380 *** `current-time' now returns extended-format time stamps
2381 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2382 PSEC is typically a multiple of 1000 on current machines. Other
2383 functions that use this format, such as `file-attributes' and
2384 `format-time-string', have been changed accordingly. Old-format time
2385 stamps are still accepted.
2387 *** The format of timers in `timer-list' and `timer-idle-list' is now
2388 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2389 The PSECS slot is new, and uses picosecond resolution. It can be
2390 accessed via the new `timer--psecs' accessor.
2392 *** Last-modified time stamps in undo lists now are of the form
2393 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2397 *** Improved security when handling persistent objects:
2399 **** `eieio-persistent-read' now features optional arguments for specifying
2400 the class to load, as well as a flag stating whether subclasses are allowed;
2401 if provided, other classes will be rejected by the reader. For
2402 compatibility with existing code, if the class is omitted only a
2405 **** New specialized reader for pulling in classes and signaling errors
2406 without evaluation of suspicious code.
2408 **** All slots that contain objects must have a :type. Slots with lists
2409 of objects must use a new type predicate for a list of an object type.
2411 *** Support for `find-function' and similar utilities, through the addition
2412 of filename support to generated symbols.
2414 ** Floating point functions now always return special values like NaN,
2415 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2416 Previously, they returned NaNs on some platforms but signaled errors
2417 on others. The affected functions are acos, asin, tan, exp, expt,
2418 log, log10, sqrt, and mod.
2420 ** New fringe bitmap `exclamation-mark'.
2422 ** Miscellaneous changes to special forms and macros
2424 *** `defun' and `defmacro' are now macros rather than special forms.
2426 *** `kbd' is now a function rather than a macro.
2428 ** Miscellaneous new functions
2430 *** `set-temporary-overlay-map' sets up a temporary keymap that
2431 takes precedence over most other maps for a short while (normally one key).
2433 *** `autoloadp' tests if its argument is an autoloaded object.
2435 *** `autoload-do-load' performs the autoloading operation.
2437 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2439 *** `file-name-base' returns a file name sans directory and extension.
2441 *** `function-get' fetches a function property, following aliases.
2443 *** `posnp' tests if an object is a `posn'.
2445 *** `system-users' returns the user names on the system.
2447 *** `system-groups' returns the group names on the system.
2449 *** `tty-top-frame' returns the topmost frame of a text terminal.
2451 ** The following functions and variables are obsolete:
2452 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2453 *** `buffer-has-markers-at'
2454 *** `macro-declaration-function' (use `macro-declarations-alist')
2455 *** `window-system-version' (provides no useful information)
2456 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2457 *** `query-replace-interactive'
2458 *** `font-list-limit' (has had no effect since Emacs < 23)
2461 * Changes in Emacs 24.3 on Non-Free Operating Systems
2463 ** Cygwin builds can use the native MS Windows user interface.
2464 Pass `--with-w32' to configure. The default remains the X11 interface.
2466 ** Two new functions are available in Cygwin builds:
2467 `cygwin-convert-file-name-from-windows' and
2468 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2469 code to access the Cygwin file-name mapping machinery to convert
2470 between Cygwin and Windows-native file and directory names.
2472 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2473 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2474 `mouse-autoselect-window'.
2476 ** On MS Windows Vista and later Emacs now supports symbolic links.
2478 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2479 support for libxml2, even if its presence is detected.
2481 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2483 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2484 directories to the search path. You must add them yourself if you want them.
2487 * Changes in Emacs 24.2
2489 ** This is mainly a bug-fix release.
2492 * Installation Changes in Emacs 24.1
2494 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2495 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2496 also depend on Gtk+. You can disable them with --without-rsvg and
2499 ** Emacs can be compiled with GnuTLS support.
2500 This happens by default if a suitably recent version of the library is
2501 found at build time. To prevent this, use the configure option
2502 `--without-gnutls'. See below for GnuTLS features.
2504 ** Emacs can be compiled with SELinux support.
2505 This happens by default if a suitably recent version of the library is
2506 found at build time. To prevent this, use the configure option
2507 `--without-selinux'. See below for SELinux features.
2509 ** Emacs can be compiled with ImageMagick support.
2510 This happens by default if a suitably recent version of the library is
2511 found at build time. To prevent this, use the configure option
2512 `--without-imagemagick'. See below for ImageMagick features.
2513 This feature is not available for the Nextstep or MS ports.
2515 ** Emacs can be compiled with libxml2 support.
2516 This happens by default if a suitably recent version of the library is
2517 found at build time. To prevent this, use the configure option
2518 `--without-xml2'. See below for libxml2 features.
2520 ** By default, the installed Info and man pages are compressed.
2521 You can disable this by configuring --without-compress-info.
2523 ** New configure option --with-wide-int.
2524 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2525 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2528 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2529 These provide no new functionality, they just remove the need to edit
2530 lib-src/Makefile by hand in order to use the associated features.
2532 ** New configure option --enable-use-lisp-union-type.
2533 This is only useful for Emacs developers to debug certain types of bugs.
2534 This is not a new feature; only the configure flag is new.
2536 ** The standalone programs digest-doc and sorted-doc are removed.
2537 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2539 ** The standalone program `fakemail' is removed.
2540 If you need it, feedmail.el provides a superset of the functionality.
2543 * Startup Changes in Emacs 24.1
2545 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2546 command line arguments, and the EMACS_UNIBYTE environment variable, no
2547 longer have any effect. (They were declared obsolete in Emacs 23.)
2549 ** New command line option `--no-site-lisp' removes site-lisp directories
2550 from load-path. -Q now implies this. This option does not affect the
2551 EMACSLOADPATH environment variable (and hence has no effect for
2555 * Changes in Emacs 24.1
2559 *** Many packages now use the `completion-at-point' command,
2560 rather than implementing separate completion commands.
2562 *** `completion-at-point' now handles tags and semantic completion.
2564 *** Completion in a non-minibuffer now tries to detect the end of completion
2565 and pops down the *Completions* buffer accordingly.
2567 *** New option `completion-cycle-threshold' allows completion cycling.
2569 *** New option `completion-category-overrides' for overriding the
2570 default completion style in certain circumstances.
2572 *** New completion style `substring'.
2574 *** Completion of buffer names uses `substring' completion by default.
2576 *** The option `widget-complete-field' has been removed.
2580 *** The first time you try sending mail, Emacs asks for a mail method.
2581 This is implemented by a new default for `send-mail-function', which
2582 is `sendmail-query-once'. This offers to use the smtpmail package, or
2583 to use the old defaults relying on external mail facilities
2584 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2585 `mailclient-send-it' on Windows).
2587 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2588 transfers the report to your desktop's preferred mail client, if there
2589 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2592 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2593 and Mail mode changes
2595 ** Emacs server and client changes
2597 *** New option `server-port' specifies the port for TCP Emacs servers.
2599 *** New emacsclient argument -q/--quiet suppresses some status messages.
2601 *** New emacsclient argument --frame-parameters specifies the frame
2602 parameters of any newly-created graphical frame.
2604 *** If emacsclient shuts down due to Emacs signaling an error,
2605 its exit status is 1.
2607 *** New emacsclient argument --parent-id ID.
2608 This opens a client frame in parent X window ID, via XEmbed, similar
2609 to the --parent-id argument to Emacs.
2611 ** Internationalization changes
2613 *** Emacs now supports display and editing of bidirectional text.
2614 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2615 displayed in the correct visual order as expected by users of those
2616 scripts. The display reordering is a "full bidirectionality" class
2617 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2618 with no RTL text should look exactly the same as before.
2620 **** New buffer-local variable `bidi-display-reordering'.
2621 To disable display reordering in a buffer, change this to nil.
2623 **** New buffer-local variable `bidi-paragraph-direction'.
2624 If nil (the default), Emacs determines the base direction of each
2625 paragraph from its text, as specified by the UBA. Setting the value
2626 to `right-to-left' or `left-to-right' forces a base direction on each
2629 Paragraphs with right-to-left base direction are displayed starting at
2630 the right window edge.
2632 *** Enhanced support for characters with no glyphs in available fonts,
2633 or, on text terminals, characters that cannot be encoded by the
2634 terminal coding system. The new option `glyphless-char-display-control'
2635 specifies how to display them: as a hexadecimal code in a box, a thin
2636 1-pixel space, an empty box, etc.
2638 *** New input methods for Farsi and Bulgarian
2639 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2641 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2642 (U+2010 and U+2011).
2644 *** New Hebrew translation of the Emacs Tutorial.
2645 Type `C-u C-h t' to choose it in case your language setup doesn't
2646 automatically select it.
2648 ** An Emacs Lisp package manager is now included.
2649 This is a convenient way to download and install additional packages,
2650 from a package repository at http://elpa.gnu.org.
2652 *** M-x list-packages shows a list of packages, which can be
2653 selected for installation.
2655 *** New command `describe-package', bound to `C-h P'.
2657 *** By default, all installed packages are loaded automatically when
2658 Emacs starts up. To disable this, set `package-enable-at-startup' to
2659 nil. To specify the packages to load, customize `package-load-list'.
2661 ** Custom theme changes
2663 *** New command `M-x customize-themes', which provides a convenient
2664 interface for enabling and disabling Custom themes.
2666 *** New option `custom-theme-load-path' is the load path for themes.
2667 Emacs no longer looks for Custom themes in `load-path'. The default
2668 value of `custom-theme-load-path' says to look for themes in
2669 `custom-theme-directory', followed by a subdirectory of
2670 `data-directory' named "themes/", which contains a small selection of
2671 built-in Custom themes.
2673 *** New option `custom-safe-themes' records known-safe theme files.
2674 If a theme is not in this list, Emacs queries before loading it, and
2675 offers to save the theme to `custom-safe-themes' automatically. By
2676 default, all themes included in Emacs are treated as safe.
2678 ** Improved GTK integration
2680 *** GTK scroll-bars are now placed on the right by default.
2681 The function `set-scroll-bar-mode' can change this.
2683 *** GTK tool bars can have just text, just images or images and text.
2684 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2685 the default is taken from desktop settings.
2687 *** GTK tool bars can be placed on any edge of the frame.
2688 The frame-parameter tool-bar-position controls this. It takes the
2689 values top, left, right or bottom. The Options => Show/Hide menu has
2692 *** The default colors for selected text (the `region' face) are taken
2693 from the GTK theme when Emacs is built with GTK.
2695 *** Emacs uses GTK tooltips by default if built with GTK.
2696 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2698 ** Graphical interface changes
2700 *** On graphical displays, the mode-line no longer ends in dashes.
2701 Also, the first dash (which does not indicate anything) is just
2702 displayed as a space.
2704 *** `menu-bar-select-buffer-function' lets you choose another operation
2705 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2707 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2708 built with Xft. These fonts can be set via X resources, for example:
2709 Emacs.pane.menubar.font: Courier-12
2713 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2714 or if it receives a SIGINT signal in batch mode.
2716 *** `kill-emacs-hook' is now also run in batch mode.
2717 Third-party code which adds to `kill-emacs-hook' should check if they
2718 do the right thing in batch mode.
2720 ** Scrolling changes
2722 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2723 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2724 of buffer at first key-press (instead they move to top/bottom of buffer)
2725 when `scroll-error-top-bottom' is non-nil.
2727 *** New option `scroll-error-top-bottom' (see above).
2729 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2730 scroll a line instead of full screen.
2732 *** New property `scroll-command' should be set on a command's symbol to
2733 define it as a scroll command affected by `scroll-preserve-screen-position'.
2735 *** If you customize `scroll-conservatively' to a value greater than 100,
2736 Emacs will never recenter point in the window when it scrolls due to
2737 cursor motion commands or commands that move point (e.f., `M-g M-g').
2738 Previously, you needed to use `most-positive-fixnum' as the value of
2739 `scroll-conservatively' to achieve the same effect.
2741 *** "Aggressive" scrolling now honors the scroll margins.
2742 If you customize `scroll-up-aggressively' or
2743 `scroll-down-aggressively' and move point off the window, Emacs now
2744 scrolls the window so as to avoid positioning point inside the scroll
2747 ** Basic SELinux support has been added.
2748 This requires Emacs to be linked with libselinux at build time.
2750 *** Emacs preserves the SELinux file context when backing up.
2751 Also, the function `copy-file' has an extra optional argument for
2752 preserving SELinux context, and the return value of `backup-buffer'
2753 now includes the SELinux context.
2755 *** New functions `file-selinux-context' and `set-file-selinux-context'
2756 get and set the SELinux context of a file.
2760 *** `delete-by-moving-to-trash' now only affects commands that specify
2761 trashing. This avoids inadvertently trashing temporary files.
2763 *** Calling `delete-file' or `delete-directory' with a prefix argument
2764 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2766 ** File- and directory-local variable changes
2768 *** You can stop directory local vars from applying to subdirectories.
2769 Add an element (subdirs . nil) to the alist portion of any variables
2770 settings to indicate that the section should not apply to
2773 *** Directory local variables can apply to some file-less buffers.
2774 Affected modes include dired, vc-dir, and log-edit. For example,
2775 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2776 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2777 `hack-dir-local-variables-non-file-buffer' to support this.
2779 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2780 Instead, use "eval: (minor-mode 1)".
2782 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2783 to `inhibit-local-variables-regexps'. As the name suggests, it now
2784 applies to ALL file local variables, not just -*- lines. The
2785 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2790 *** The `quit-window' command now restores the last buffer displayed
2791 in the quitted window.
2793 *** Resizing an Emacs frame now preserves proportional window sizes,
2794 modulo restrictions like window minimum sizes and fixed-size windows.
2796 *** The behavior of `display-buffer' is now customizable in detail.
2798 **** New option `display-buffer-base-action' specifies a list of
2799 user-determined display "actions" (functions and optional arguments
2800 for choosing the displaying window).
2802 This takes precedence over the default display action, which is
2803 specified by `display-buffer-fallback-action'.
2805 **** New option `display-buffer-alist' maps buffer name regexps to
2806 display actions, taking precedence over `display-buffer-base-action'.
2808 *** New option `window-combination-limit'.
2809 The new option `window-combination-limit' allows to return the space
2810 obtained for resizing or creating a window more reliably to the window
2811 from which such space was obtained.
2813 *** New option `window-combination-resize'.
2814 The new option `window-combination-resize' allows to split a window that
2815 otherwise cannot be split because it's too small by stealing space from
2816 other windows in the same combination. Subsequent resizing or deletion
2817 of the window will resize all windows in the same combination as well.
2819 *** New option `frame-auto-hide-function' lets you choose between
2820 iconifying or deleting a frame when burying a buffer in a dedicated
2821 frame, or quitting a window showing a buffer in a frame of its own.
2823 *** New commands `maximize-window' and `minimize-window'.
2824 These maximize and minimize the size of a window within its frame.
2826 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2827 These functions allow to navigate through the live buffers that have
2828 been shown in a specific window.
2830 ** Minibuffer changes
2832 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2833 This is handy for minibuffer-only frames, and is also used for the feature
2834 where mouse-1 pops up *Messages*"', which can now easily be changed.
2836 *** Minibuffers set `truncate-lines' to nil.
2837 If you want to change the value to something else, you could use
2838 for example `minibuffer-setup-hook'.
2840 ** `auto-mode-case-fold' is now enabled by default.
2842 ** `backup-by-copying-when-mismatch' now defaults to t.
2844 ** New basic faces `error', `warning', `success'.
2845 These are used to highlight text indicating failure, caution or
2846 successful operation.
2848 ** New option `list-colors-sort' defines the color sort order
2849 for `list-colors-display'.
2851 ** The variable `focus-follows-mouse' now always defaults to nil.
2854 * Editing Changes in Emacs 24.1
2858 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2859 `isearch-yank-line'.
2861 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2862 `isearch-yank-kill'.
2864 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2866 ** New commands `count-words-region' and `count-words'.
2868 *** M-= is bound to `count-words-region', not `count-lines-region'.
2869 The `count-words-region' command, when called interactively, reports
2870 the number of lines, words, and characters in the region. It is a
2871 superset of the old `count-lines-region', which is now an obsolete
2874 ** The command `just-one-space' (M-SPC), if given a negative argument,
2875 also deletes newlines around point.
2879 *** New option `delete-active-region'.
2880 If non-nil, [delete] and DEL delete the region if it is active and no
2881 prefix argument is given. If set to `kill', those commands kill
2884 *** New command `delete-forward-char', bound to [delete].
2885 This is meant for interactive use, and obeys `delete-active-region'.
2886 The command `delete-char' does not obey `delete-active-region'.
2888 *** `delete-backward-char' is now a Lisp function.
2889 Apart from obeying `delete-active-region', its behavior is unchanged.
2890 However, the byte compiler now warns if it is called from Lisp; Lisp
2891 callers should use delete-char with a negative argument instead.
2893 *** The option `mouse-region-delete-keys' has been deleted.
2895 ** Selection changes.
2897 The default handling of clipboard and primary selections has been
2898 changed to conform with modern X applications. In short, most
2899 commands for killing and yanking text now use the clipboard, while
2900 mouse commands use the primary selection.
2902 In the following, we provide a list of these changes, followed by a
2903 list of steps to get the old behavior back if you prefer that.
2905 *** `select-active-regions' now defaults to t.
2906 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2907 the kill ring. The selected text is put in the primary selection, if
2908 the system possesses a separate primary selection facility (e.g. X).
2910 **** `select-active-regions' also accepts a new value, `only'.
2911 This means to only set the primary selection for temporarily active
2912 regions (usually made by mouse-dragging or shift-selection);
2913 "ordinary" active regions, such as those made with C-SPC followed by
2914 point motion, do not alter the primary selection.
2916 **** `mouse-drag-copy-region' now defaults to nil.
2918 *** mouse-2 is now bound to `mouse-yank-primary'.
2919 This pastes from the primary selection, ignoring the kill-ring.
2920 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2922 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2924 *** `x-select-enable-primary' now defaults to nil.
2925 Thus, commands that kill text or copy it to the kill-ring (such as
2926 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2928 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2929 exactly equivalent to M-w, C-w, and C-y respectively.
2931 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2932 non-nil by default, as Windows does not support the primary selection
2933 between applications.
2935 *** To return to the previous behavior, do the following:
2937 **** Change `select-active-regions' to nil.
2938 **** Change `mouse-drag-copy-region' to t.
2939 **** Change `x-select-enable-primary' to t (on X only).
2940 **** Change `x-select-enable-clipboard' to nil.
2941 **** Bind `mouse-yank-at-click' to mouse-2.
2943 *** Support for X cut buffers has been removed.
2945 *** X clipboard managers are now supported.
2946 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2948 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2949 in the current rectangle. With a prefix argument, this prompts for a
2950 number to count from and for a format string.
2952 ** `redisplay-dont-pause' now defaults to t.
2953 This makes Emacs feel more responsive to editing commands that arrive
2954 at high rate, e.g. if you lean on some key, because stopping redisplay
2955 in the middle (when this variable is nil) forces more expensive
2956 updates later on, and Emacs appears to be unable to keep up.
2958 ** The behavior of <TAB> for active regions in Text mode has changed.
2959 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2960 when the region is active causes Emacs to indent all the lines in the
2961 region, aligning them with the line previous to the first line in the
2962 region (or with the left margin if there is no previous line).
2964 ** When `occur' is called with a prefix argument, matching strings are
2965 collected into the `*Occur*' buffer without line numbers. If there
2966 are parenthesized subexpressions in the specified regexp, `occur'
2967 reads replacement text that may contain \\& and \\N whose convention
2968 follows `replace-match'.
2971 * Changes in Specialized Modes and Packages in Emacs 24.1
2973 ** Archive Mode has basic support for browsing and updating 7z archives.
2977 *** BibTeX mode now supports biblatex.
2978 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2979 `bibtex-entry-field-alist' is now an obsolete alias for
2980 `bibtex-BibTeX-entry-alist'.
2982 *** New command `bibtex-search-entries', bound to C-c C-a.
2984 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2986 *** New variable `bibtex-search-entry-globally'.
2990 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2992 *** The default browser used by the package is now the "xdg-open" program,
2993 on platforms that support it. This calls your desktop's preferred browser.
2997 *** Support for musical notes.
2999 *** Support for logarithmic units.
3001 *** No longer uses the tex prefix for TeX specific unit names when
3002 using TeX or LaTeX mode.
3004 *** New option to highlight selections using faces.
3006 *** `calc-histogram' has the option of using a vector to determine the bins.
3008 *** New "O" option prefix.
3010 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3012 ** Calendar, Diary, and Appt
3014 *** Diary entries can contain non-printing "comments".
3015 See the variable `diary-comment-start'.
3017 *** Appointments can specify their individual warning times.
3018 See the variable `appt-warning-time-regexp'.
3020 *** The function specified by `appt-disp-window-function' may be passed
3021 lists of arguments if multiple appointments are due at similar times.
3022 If you are using a custom function for this, you should update it.
3024 *** New function `diary-hebrew-birthday'.
3026 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3027 may no longer be nil, but must all be strings.
3029 *** The obsolete (since Emacs 22.1) method of enabling the appt
3030 package by adding `appt-make-list' to `diary-hook' has been removed.
3031 Use `appt-activate' instead.
3033 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
3034 appt-issue-message (use the function appt-activate)
3035 appt-visible/appt-msg-window (use the variable appt-display-format)
3037 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3038 view-diary-entries, list-diary-entries, show-all-diary-entries
3042 *** New feature to "guess" the style in an existing buffer.
3043 The main entry point is M-x c-guess.
3045 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3047 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3048 Thus C-M-a will, by default, go to the beginning of the immediate function,
3051 *** "Macros with semicolons" can be registered for correct indentation.
3052 Where such a macro ends a line (no semicolon) the next statement is no longer
3053 parsed as a statement continuation.
3055 ** Comint and modes derived from it use the standard completion code.
3059 *** Compilation mode can be used without Font Lock mode.
3060 `compilation-parse-errors-function' is now obsolete.
3062 *** New variable `compilation-filter-start', which is bound while
3063 `compilation-filter-hook' runs. It records the start position of the
3064 text inserted by `compilation-filter'.
3066 *** `compilation-error-screen-columns' and `compilation-first-column'
3067 are obeyed in the editing buffer. So programming language modes can
3068 set them, whereas previously only the value in the *Compilation*
3073 *** Customize buffers now contain a search field.
3074 The search is performed using `customize-apropos'.
3075 To turn off the search field, set `custom-search-field' to nil.
3077 *** Options in customize group buffers start out hidden if not customized.
3078 Use the arrow to the left of the option name to toggle visibility.
3080 *** custom-buffer-sort-alphabetically now defaults to t.
3082 *** The color widget now has a "Choose" button, which allows you to
3083 choose a color via `list-colors-display'.
3087 *** It is now possible to access buses other than the default system
3090 *** The `dbus-register-method' and `dbus-register-property' functions
3091 optionally do not register names.
3093 *** The new function `dbus-register-service' registers a known service
3094 name on a D-Bus without also registering a property or a method.
3098 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3099 if called with a prefix argument, read a file name from the minibuffer
3100 instead of using the current buffer.
3102 *** The "dired local variables" feature of Dired-x is obsolete.
3103 The standard directory local variables feature replaces it.
3107 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3108 controlling attempts to autojoin a channel.
3110 *** New variable `erc-coding-system-precedence': If we use `undecided'
3111 as the server coding system, this variable will then be consulted.
3112 The default is to decode strings that can be decoded as utf-8 as
3113 utf-8, and do the normal `undecided' decoding for the rest.
3117 *** The default value of `eshell-directory-name' has changed
3118 to be an "eshell" directory in `user-emacs-directory'.
3119 The old "~/.eshell/" directory is still used if it exists, though.
3123 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3124 It now supports multithread non-stop debugging and simultaneous
3125 debugging of several threads.
3129 *** RET (`image-toggle-animation') toggles animation, if applicable.
3130 Animation plays once, unless the option `image-animate-loop' is non-nil.
3134 *** New command M-x info-display-manual displays a named Info manual.
3135 If that manual is already visited in some Info buffer, it displays
3136 that buffer. (This is handy if you have many manuals in many *info*
3137 buffers, and don't remember the name of the buffer visiting the manual
3138 you want to consult.) Otherwise, it loads and displays the manual.
3140 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3141 This is for compatibility with the stand-alone Info reader program,
3142 and also because `Info-edit' is a rarely used command that is disabled
3145 ** Mail mode changes (not Message mode)
3147 *** New command M-x mail-add-attachment for adding MIME attachments
3149 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3150 (Its name is misleading, since it has nothing to do with MIME
3151 attachments.) The old name is now an obsolete alias to the new name.
3153 ** MH-E has been updated to MH-E version 8.3.1.
3154 See MH-E-NEWS for details.
3156 ** Modula-2 mode provides auto-indentation.
3158 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3160 ** nXML mode no longer binds C-RET to `nxml-complete'.
3161 Completion is now performed via `completion-at-point', bound to C-M-i
3162 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3163 default), this performs tag completion.
3165 ** Org mode has been updated to version 7.8.09.
3166 See ORG-NEWS for details.
3168 ** Prolog mode has been completely revamped, with lots of additional
3169 functionality such as more intelligent indentation, electricity,
3170 support for more variants, including Mercury, and a lot more.
3174 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3175 in the Rmail incoming message.
3177 *** The variable `rmail-message-filter' no longer has any effect.
3178 This change was made in Emacs 23.1 but was not advertised at the time.
3179 Try using `rmail-show-message-hook' instead.
3183 *** M-x shell prompts for the shell path name if the default directory
3184 is a remote file name and neither the environment variable $ESHELL nor
3185 the variable `explicit-shell-file-name' is set.
3187 *** TAB is now bound to the standard `completion-at-point' command,
3188 which now implements the pcomplete rules for shell command completion.
3192 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3193 if the mail server supports them. This uses either built-in GnuTLS
3194 support, or the starttls.el library. Customize `smtpmail-stream-type'
3197 *** The variable `smtpmail-auth-credentials' has been removed.
3198 By default, the information is now stored in the file ~/.authinfo.
3199 This was the default value of smtpmail-auth-credentials. If you had
3200 customized smtpmail-auth-credentials to a list of user names and
3201 passwords, those settings are not used. During your first connection
3202 to the smtp server, Emacs will prompt for the user name and password,
3203 and offer to save them to ~/.authinfo. Or you can manually copy the
3204 credentials to ~/.authinfo. For example, if you had
3206 (setq smtpmail-auth-credentials
3207 '(("mail.example.org" 25 "jim" "s!cret")))
3209 then the equivalent line in ~/.authinfo would be
3211 machine mail.example.org port 25 login jim password s!cret
3213 See the auth-source manual for more information, e.g. on encrypting
3214 the credentials file.
3216 *** The variable `smtpmail-starttls-credentials' has been removed.
3217 If you had that set, you need to put
3219 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3221 in your ~/.authinfo file instead.
3223 *** SMTPmail defaults to using the address in the From: header as the
3224 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3225 to the address you wish to use instead.
3229 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3230 and `sql-oracle-scan-on'.
3232 *** New options controlling prompting for login parameters.
3233 Each supported product has a custom variable `sql-*-login-params',
3234 which is a list of the parameters to be prompted for before a
3235 connection is established.
3237 *** The command `sql-product-interactive' now takes a prefix argument,
3238 which causes it to prompt for an SQL product.
3240 *** Product-specific SQL interactive commands now take prefix arguments.
3241 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3242 given a prefix argument, prompt for a name for the SQL interactive
3243 buffer. This reduces the need for calling `sql-rename-buffer'.
3245 *** SQL interactive modes suppress command continuation prompts, and
3246 replace tabs with spaces. The first change impacts multiple line SQL
3247 statements entered with C-j between each line, statements yanked into
3248 the buffer and statements sent with `sql-send-*' functions. The
3249 second prevents the MySQL and Postgres interpreters from listing
3250 object name completions when sent text via `sql-send-*' functions.
3252 *** New command `sql-connect' starts a predefined SQLi session,
3253 using the login parameters from `sql-connection-alist'.
3255 *** New "Save Connection" menu item in SQLi buffers.
3256 This gathers the login params specified for the SQLi session, if it
3257 was not started by a connection, and saves them as a new connection.
3259 *** New commands for listing database objects and details:
3260 sql-list-all and sql-list-table.
3262 *** An API for manipulating SQL product definitions has been added.
3266 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3270 *** New inline access method "ksu" (kerberized su).
3272 *** The following access methods are discontinued: "ssh1_old",
3273 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3275 *** The user option `remote-file-name-inhibit-cache' controls whether
3276 remote file attributes are cached for better performance.
3278 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3279 default value to "".
3281 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3282 for remote machines which support SELinux.
3284 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3285 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3286 the degree of parallelism.
3288 ** VC and related modes
3290 *** Support for pulling on distributed version control systems.
3291 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3292 supported (currently with Bzr, Git, and Mercurial), to update the
3293 current branch and working tree. A prefix argument means to prompt
3294 the user for specifics, e.g. a pull location.
3296 *** `vc-update' is now an alias for `vc-pull'.
3298 *** Support for merging on distributed version control systems.
3299 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3300 is supported (currently with Bzr, Git, and Mercurial), to merge
3301 changes from another branch into the current one. It prompts for
3302 specifics, e.g. a merge source.
3304 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3305 shows a diff while querying the user. It defaults to t.
3307 *** Log entries in some Log View buffers can be toggled to display a
3308 longer description by typing RET (log-view-toggle-entry-display).
3309 This is currently supported for Bzr, Git, and Mercurial (to support
3310 another backend, define a `log-view-expanded-log-entry-function').
3311 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3312 use this to display the full log entry for the revision at point.
3314 *** New command `vc-ediff' allows visual comparison of two revisions
3315 of a file similar to `vc-diff', but using ediff backend.
3317 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3318 this was not advertised at the time.
3320 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3321 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3322 this was not advertised at the time.
3328 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3330 *** partial-completion-mode (complete.el) is obsolete.
3331 You can get a comparable behavior with:
3332 (setq completion-styles '(partial-completion initials))
3333 (setq completion-pcm-complete-word-inserts-delimiters t)
3335 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3337 *** pgg is obsolete (use EasyPG instead).
3339 *** sregex.el is obsolete, since rx.el is a strict superset.
3341 *** s-region.el and pc-select.el are obsolete.
3342 They are superseded by shift-select-mode, enabled by default since 23.1.
3344 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3348 *** The Landmark game is now invoked with `landmark', not `lm'.
3349 Its functions and variables have been similarly renamed.
3351 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3352 (This interfered with cua-mode.)
3354 *** f90.el has some support for Fortran 2008 syntax.
3356 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3358 *** New command `nato-region' converts text to NATO phonetic alphabet.
3361 * New Modes and Packages in Emacs 24.1
3363 ** Occur Edit mode applies edits made in *Occur* buffers to the
3364 original buffers. It is bound to "e" in Occur mode.
3366 ** New global minor mode electric-pair-mode.
3367 When enabled, typing an open parenthesis automatically inserts the
3368 matching closing one.
3370 ** New global minor mode electric-indent-mode.
3371 When enabled, typing certain characters triggers reindentation.
3372 Major modes wishing to use this can set electric-indent-chars or
3373 electric-indent-functions.
3375 ** New global minor mode electric-layout-mode.
3376 When enabled, typing certain characters automatically inserts newlines.
3377 Major modes wishing to use this can set electric-layout-rules.
3379 ** tabulated-list.el provides a generic major mode for tabulated data,
3380 from which other modes can be derived.
3382 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3384 ** secrets.el is an implementation of the Secret Service API, an
3385 interface to password managers like GNOME Keyring or KDE Wallet. The
3386 Secret Service API requires D-Bus for communication. The command
3387 `secrets-show-secrets' offers a buffer with a visualization of the
3390 ** notifications.el provides an implementation of the Desktop
3391 Notifications API. It requires D-Bus for communication.
3393 ** soap-client.el supports access to SOAP web services from Emacs.
3394 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3396 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3398 ** New emacs-lock.el package.
3399 The previous version has been moved to obsolete/old-emacs-lock.el.
3400 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3401 against exiting Emacs and killing the buffer can be set separately.
3402 The mechanism for automatically turning off protection for buffers
3403 with dead inferior processes has been generalized.
3406 * Incompatible Lisp Changes in Emacs 24.1
3408 ** Passing a nil argument to a minor mode function call now ENABLES
3409 the minor mode unconditionally. This is so that you can write e.g.
3411 (add-hook 'text-mode-hook 'foo-mode)
3413 to enable foo-mode in Text mode buffers, removing the need for
3414 `turn-on-foo-mode' style functions. This affects all mode commands
3415 defined by `define-minor-mode'. If called interactively, the mode
3416 command still toggles the minor mode.
3418 ** The return value of `backup-buffer' has changed.
3419 It is now a list of three elements, where the second element is a list
3420 describing the original file's SELinux context. If Emacs or the
3421 system lacks SELinux support, the context list is (nil nil nil nil).
3422 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3424 ** `char-direction-table' and the `char-direction' function were deleted.
3425 They were buggy and inferior to the new support of bidirectional
3426 editing introduced in Emacs 24. If you need the bidirectional
3427 properties of a character, use `get-char-code-property' with the last
3428 argument `bidi-class'.
3430 ** `copy-directory' now copies the source directory as a subdirectory
3431 of the target directory, if the latter is an existing directory. The
3432 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3433 the contents directly into a pre-existing target directory.
3435 ** For mouse click input events in the text area, the Y pixel
3436 coordinate in the POSITION list now counts from the top of the text
3437 area, excluding any header line. Previously, it counted from the top
3440 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3441 been further reduced. Now a backquote not followed by a space is
3442 always treated as a "new-style" backquote. Please remove all
3443 "old-style" backquotes from your code. If your code uses backquotes
3444 as documented in the Elisp manual, and compiles without warning, then
3445 you have nothing to do in this regard. Code not following the
3446 appropriate conventions may fail to compile.
3448 The most common cause of trouble seems to be an old-style backquote
3449 followed by a newline. Another cause of trouble is vector notation
3450 for key sequence notation: instead of [(control ,)] and [(control ')],
3451 you should write [(control ?,)] and [(control ?')], which will work in
3454 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3455 was not advertised at the time. The function `custom-initialize-delay'
3456 replaced all known uses.
3458 ** `view-buffer' now treats special mode-class in the same way that
3459 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3460 major mode is special).
3462 ** Menu and tool bar changes
3464 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3465 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3466 With these alist entries omitted, `make-frame' checks the value of the
3467 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3468 a menu-bar or tool-bar, respectively. If the alist entries are added,
3469 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3471 *** The menu bar bindings's caches are not used any more.
3472 Use (where-is-internal <def> nil t) instead.
3474 ** Regions created by mouse dragging are now normal active regions,
3475 similar to those created by shift-selection (see Selection changes
3476 above). In previous Emacs versions, these regions were delineated by
3477 `mouse-drag-overlay'; that variable has been removed.
3479 ** The fourth argument of `filter-buffer-substring' has been removed.
3480 If you want to remove text properties from the final result, simply
3481 pass the result through substring-no-properties.
3483 ** cl.el no longer provides `cl-19'.
3485 ** The following obsolete functions and aliases have been removed
3486 (the appropriate new function is given in parentheses; "not needed"
3487 means you can just remove all calls to the function in question):
3489 *** `comint-kill-output' (`comint-delete-output')
3490 *** `decompose-composite-char' (`char-to-string')
3491 *** `outline-visible' (`outline-invisible-p')
3492 *** `internal-find-face' (`facep')
3493 *** `internal-get-face' (`facep and check-face')
3494 *** `frame-update-faces' (not needed)
3495 *** `frame-update-face-colors' (`frame-set-background-mode')
3496 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3497 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3498 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3499 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3500 *** `x-make-font-unbold' (`make-face-unbold')
3501 *** `x-make-font-unitalic' (`make-face-unitalic')
3502 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3503 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3504 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3505 *** `char-bytes' (== 1)
3506 *** `isearch-return-char' (`isearch-printing-char')
3507 *** `make-local-hook' (not needed)
3508 *** `set-screen-height' (`set-frame-height')
3509 *** `set-screen-width' (`set-frame-width')
3511 ** The following obsolete variables and varaliases have been removed
3512 (the appropriate new variable is given in parentheses):
3514 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3515 *** `vc-header-alist' (`vc-BACKEND-header')
3516 *** `directory-sep-char' (== ?/)
3517 *** `font-lock-defaults-alist' (`font-lock-defaults')
3518 *** `e' (`float-e').
3520 ** The following obsolete files were removed:
3521 sc.el, x-menu.el, rnews.el, rnewspost.el
3523 ** The format of the finder-inf.el file has changed, since the Finder
3524 mechanism is now based on the package system. The variable
3525 `finder-package-info' is replaced by `package--builtins' and
3526 `finder-keywords-hash'.
3528 ** When generating autoloads, `update-directory-autoloads' no longer
3529 assumes every inspected file is in your `load-path'. It instead
3530 generates relative names according to the current `load-path'.
3533 * Lisp Changes in Emacs 24.1
3535 ** Code can now use lexical scoping by default instead of dynamic scoping.
3536 The `lexical-binding' variable enables lexical scoping for local
3537 variables. It is typically set via a file-local variable in the first
3538 line of the file, in which case it applies to all the code in that
3541 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3542 binding instead of the old dynamic binding mode.
3544 *** Lexically scoped interpreted functions are represented with a new form
3545 of function value which looks like (closure ENV ARGS &rest BODY).
3547 *** New macro `letrec' to define recursive local functions.
3549 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3550 So do `defcustom' and other forms that call `defvar' as a subroutine.
3552 *** New function `special-variable-p' to check whether a variable is
3553 declared as dynamically bound.
3555 *** The form ((lambda ...) ...) is deprecated.
3557 ** An Emacs Lisp testing tool is now included.
3558 Emacs Lisp developers can use this tool to write automated tests for
3559 their code. See the ERT info manual for details.
3561 ** Changes for bidirectional display and editing
3563 *** New function `current-bidi-paragraph-direction'.
3564 This returns the base direction of the paragraph at point.
3566 *** New function `bidi-string-mark-left-to-right'.
3567 Given a string containing characters from right-to-left scripts, this
3568 function returns another string which can be safely inserted into a
3569 buffer, such that any following text will be always displayed to the
3570 right of that string. (This works by appending an invisible Unicode
3571 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3573 This is useful when the buffer has overall left-to-right paragraph
3574 direction and you need to insert a string whose contents are not known
3575 in advance, without disrupting the layout of the line.
3579 *** Window tree functions are accessible in Elisp.
3580 Functions are provided to return the parent, siblings or child windows
3581 of any window including internal windows (windows not associated with a
3582 buffer) in the window tree.
3584 **** New function `window-valid-p' gives non-nil for live and internal
3587 **** Window manipulation can deal with internal windows.
3588 Many window handling functions like `split-window', `delete-window', or
3589 `delete-other-windows' as well as the window resizing functions can now
3590 act on any window including internal ones.
3592 *** window-total-height/-width vs window-body-height/-width.
3593 The function `window-height' has been renamed to `window-total-height'
3594 and `window-width' has been renamed to `window-body-width'. The old
3595 names are provided as aliases. Two new functions `window-total-width'
3596 and `window-body-height' are provided.
3598 *** Window parameters specific to window handling functions.
3599 For each window you can specify a parameter to override the default
3600 behavior of a number of functions like `split-window', `delete-window'
3601 and `delete-other-windows'. The variable `ignore-window-parameters'
3602 allows to ignore processing such parameters.
3604 *** New semantics of third argument of `split-window'.
3605 The third argument of `split-window' has been renamed to SIDE and can be
3606 set to any of the values 'below, 'right, 'above, or 'left to make the
3607 new window appear on the corresponding side of the window that shall be
3608 split. Any other value of SIDE will cause `split-window' to split the
3609 window into two side-by-side windows as before.
3611 *** Window resizing functions.
3612 A new standard function for resizing windows called `window-resize' has
3613 been introduced. This and all other functions for resizing windows no
3614 longer delete any windows when they become too small.
3616 *** Deleting the selected window now selects the most recently selected
3617 live window on that frame instead.
3619 *** `adjust-window-trailing-edge' adjustments.
3620 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3621 is able to resize other windows if a window adjacent to the trailing
3622 edge cannot be shrunk any more. This makes its behavior more similar to
3623 that of Emacs 21 without compromising, however, its inability to delete
3624 windows which was introduced in Emacs 22.
3626 *** Window-local buffer lists.
3627 Windows now have local buffer lists. This means that removing a buffer
3628 from display in a window will preferably show the buffer previously
3629 shown in that window with its previous window-start and window-point
3630 positions. This also means that the same buffer may be automatically
3631 shown twice even if it already appears in another window.
3633 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3634 which if non-nil requires the buffer to be displayed in the currently
3635 selected window, signaling an error otherwise. If nil, another window
3636 can be used, e.g. if the selected one is strongly dedicated.
3638 *** `split-window-vertically' and `split-window-horizontally' renamed
3639 to `split-window-below' and `split-window-right' respectively.
3640 The old names are kept as aliases.
3644 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3645 named ACTION, and takes a display action of the same form as
3646 `display-buffer-base-action' (see Changes, above). A non-nil,
3647 non-list value is treated specially, as the old meaning.
3649 **** New variable `display-buffer-overriding-action'.
3651 **** The procedure of `display-buffer' etc. to choose a window is
3652 determined by combining `display-buffer-overriding-action',
3653 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3654 and `display-buffer-fallback-action'. The second and fourth of these
3655 are user-customizable variables.
3657 See the docstring of `display-buffer' for details.
3659 *** New functions `window-state-get' and `window-state-put'.
3660 These functions allow to save and restore the state of an arbitrary
3661 frame or window as an Elisp object.
3665 *** New variable `completion-extra-properties' used to specify extra
3666 properties of the current completion:
3667 - :annotate-function, same as the old completion-annotate-function.
3668 - :exit-function, function to call after completion took place.
3670 *** Functions on `completion-at-point-functions' can return any of the
3671 properties valid for `completion-extra-properties'.
3673 *** `completion-annotate-function' is obsolete.
3675 *** New `metadata' method for completion tables. The metadata thus returned
3676 can specify various details of the data returned by `all-completions':
3677 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3678 used to select a style in completion-category-overrides.
3679 - `annotation-function' to add annotations in *Completions*.
3680 - `display-sort-function' to specify how to sort entries in *Completions*.
3681 - `cycle-sort-function' to specify how to sort entries when cycling.
3683 *** `minibuffer-local-filename-must-match-map' is not used any more.
3684 Instead, the bindings in `minibuffer-local-filename-completion-map'
3685 are combined with `minibuffer-local-must-match-map'.
3687 *** New variable `completing-read-function' allows overriding the
3688 behavior of `completing-read'.
3690 ** `glyphless-char-display' can now distinguish between graphical and
3691 text terminal display, via a char-table entry that is a cons cell.
3693 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3694 Instead, the offending function is removed.
3698 *** New function `run-hook-wrapped' for running an abnormal hook by
3699 passing the hook functions as arguments to a "wrapping" function.
3700 Like `run-hook-with-args-until-success', it stops at the first
3701 non-nil return value.
3703 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3704 set of "wrapping" filters, similar to around advice.
3705 (A version of this macro was actually added in Emacs 23.2 but was not
3706 advertised at the time.)
3710 *** New macro `condition-case-unless-debug' (this was actually added in
3711 Emacs 23.1 as condition-case-no-debug, but not advertised)
3713 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3715 *** Variable `stack-trace-on-error' removed.
3717 *** The debugger can now "continue" from an error, which means it will
3718 jump to the error handler as if the debugger had not been invoked
3719 instead of jumping all the way to the top-level.
3721 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3722 This can be useful when `inhibit-quit' is set.
3724 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3725 named Emacs server instances.
3727 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3728 to redirect STDOUT to a file.
3730 ** The function `format-time-string' now supports the %N directive,
3731 for higher-resolution time stamps.
3733 ** New input reading functions
3735 *** New function `read-char-choice' reads a restricted set of
3736 characters, discarding any inputs not inside the set.
3738 *** The command `read-color' now requires a match for a color name
3739 or RGB triplet, instead of signaling an error if the user provides
3742 **** `facemenu-read-color' is now an alias for `read-color'.
3744 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3745 The variable is now used to load all kind of supported dynamic libraries,
3746 not just image libraries. The previous name is still available as an
3749 ** Syntax parsing changes
3751 *** New variable `syntax-propertize-function'.
3752 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3753 This allows syntax-table properties to be set independently from font-lock:
3754 just call syntax-propertize to make sure the text is propertized.
3755 Together with this new variable come a new hook
3756 syntax-propertize-extend-region-functions, as well as two helper functions:
3757 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3758 as-is; and syntax-propertize-rules which provides a new way to specify
3761 *** Syntax tables support a new "comment style c" additionally to style b.
3763 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3765 ** frame-local variables cannot be let-bound any more.
3767 ** Major and minor mode changes
3769 *** `set-auto-mode' now respects mode: local variables at the end of files,
3770 as well as those in the -*- line.
3772 *** `prog-mode' is a new major mode from which programming modes
3775 **** `prog-mode-hook' can be used to enable features for programming
3776 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3777 on-the-fly spell checking for comments and strings.
3779 *** New hook `change-major-mode-after-body-hook', run by
3780 `run-mode-hooks' just before any other mode hooks.
3782 *** Enabled globalized minor modes can be disabled in specific major modes.
3783 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3784 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3786 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3788 ** File-handling changes
3790 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3791 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3792 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3793 argument is supplied (see Trash changes, above).
3795 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3797 ** Tool-bars can display separators.
3798 Tool-bar separators are handled like menu separators in menu-bar maps,
3799 i.e. via menu entries of the form `(menu-item "--")'.
3803 *** Animated images support (currently animated gifs only).
3805 **** `image-animated-p' returns non-nil if an image can be animated.
3807 **** `image-animate' animates a supplied image spec.
3809 **** `image-animate-timer' returns the timer object for an image that
3812 *** `image-extension-data' has been renamed to `image-metadata'.
3813 The old name is an obsolete alias to the new one.
3815 *** Image mode can view any image type that ImageMagick supports.
3816 This requires Emacs to be built with ImageMagick support.
3818 **** New function `imagemagick-types', defined if ImageMagick support
3819 is enabled, returns a list of image file extensions that your
3820 ImageMagick installation supports.
3822 **** New function `imagemagick-register-types' enables ImageMagick
3823 image types in Image mode and in `create-image' and other helper
3826 **** New option `imagemagick-types-inhibit' excludes certain
3827 ImageMagick image types from `imagemagick-register-types'.
3829 **** With ImageMagick support, there are extra Image mode commands to
3830 resize and rotate images: `image-transform-fit-to-height',
3831 `image-transform-fit-to-width', `image-transform-set-rotation', and
3832 `image-transform-set-scale'.
3834 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3835 passes it to the mail user agent function. This argument specifies an
3836 action for returning to the caller after finishing with the mail. For
3837 example, this is used by Rmail to optionally delete a mail window.
3839 ** XML and HTML parsing
3840 If Emacs is compiled with libxml2 support, there are two new
3841 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3842 and `libxml-parse-xml-region' (which parses XML). Both return an
3843 Emacs Lisp parse tree.
3845 ** Networking and encryption changes
3847 *** `open-network-stream' can now be used to open an encrypted stream.
3848 It now accepts an optional `:type' parameter for initiating a TLS
3849 connection, directly or via STARTTLS. To do STARTTLS, additional
3850 parameters (`:end-of-command', `:success', `:capabilities-command')
3851 must also be supplied.
3853 *** New library gnutls.el.
3854 The new function `gnutls-available-p' returns non-nil if Emacs is
3855 built with GnuTLS support. The main entry points are
3856 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3857 these functions through `open-network-stream', because that can
3858 upgrade connections through STARTTLS opportunistically or use plain
3859 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3862 *** New primitive `secure-hash' that supports many secure hash algorithms:
3863 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3864 sha1.el has been removed. The `sha1' feature is provided by default.
3868 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3870 ** Progress reporters can now "spin".
3871 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3872 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3873 time you call `progress-reporter-update' on that progress reporter,
3874 with a nil or omitted VALUE argument, the reporter message is
3875 displayed with a "spinning bar".
3877 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3878 being reverted, even if the buffer has a local `revert-buffer-function'.
3880 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3881 If delayed-warnings-list is non-nil, the command loop calls
3882 `delayed-warnings-hook' after `post-command-hook'. At present, this
3883 is only used by Emacs on some platforms to display warnings during
3884 startup, which might otherwise not be noticed. This uses the
3885 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3887 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3889 ** New function `make-composed-keymap' that constructs a new keymap
3890 from multiple input maps. You can use this to make a keymap that
3891 inherits from multiple maps, eg:
3892 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3894 ** New function `string-prefix-p'.
3895 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3897 ** New reader macro ## that stands for the empty symbol.
3898 This means that the empty symbol can now be read back. Also, #: by itself
3899 (when not immediately followed by a possible symbol character) stands for
3900 an empty uninterned symbol.
3902 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3904 ** The following functions and variables are obsolete:
3906 *** `tooltip-use-echo-area' is obsolete.
3907 Rather than setting this to t, disable Tooltip mode instead.
3909 *** buffer-substring-filters is obsolete.
3910 Use `filter-buffer-substring-functions' instead.
3912 *** `byte-compile-disable-print-circle' is obsolete.
3914 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3915 Use `post-command-hook' instead.
3917 *** `font-lock-maximum-size' is obsolete.
3920 * Changes in Emacs 24.1 on Non-Free Operating Systems
3922 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3923 and also when HOME is set to C:\ by default.
3925 ** New configure.bat options
3927 *** --enable-checking builds Emacs with extra runtime checks.
3929 *** --distfiles specifies files to be included in binary distribution.
3931 *** --without-gnutls disables automatic GnuTLS detection.
3933 *** --lib for general library linkage, works with the USER_LIBS build variable.
3935 ** New make target `dist' to create binary distribution for MS Windows.
3937 ** The Lisp function `w32-default-color-map' is now obsolete.
3938 (It is only used internally in the Emacs C code.)
3940 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3941 reappear on mouse-over. (Requires OS X 10.6 or later.)
3943 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3944 other platforms, rather than inserting its contents into the buffer.
3947 ----------------------------------------------------------------------
3948 This file is part of GNU Emacs.
3950 GNU Emacs is free software: you can redistribute it and/or modify
3951 it under the terms of the GNU General Public License as published by
3952 the Free Software Foundation, either version 3 of the License, or
3953 (at your option) any later version.
3955 GNU Emacs is distributed in the hope that it will be useful,
3956 but WITHOUT ANY WARRANTY; without even the implied warranty of
3957 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3958 GNU General Public License for more details.
3960 You should have received a copy of the GNU General Public License
3961 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3967 paragraph-separate: "[
\f]*$"