1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 24.
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 24.4
27 ** Emacs can now be compiled with ACL support.
28 This happens by default if a suitable support library is found at
29 build time, like libacl on GNU/Linux. To prevent this, use the
30 configure option `--disable-acl'.
31 FIXME? Should be --without-acl?
33 ** Emacs can now be compiled with file notification support.
34 This happens by default if a suitable system library is found at
35 build time. To prevent this, use the configure option
36 `--without-file-notification'. See below for file-notify features.
37 FIXME? This feature is not available for the Nextstep port. (?)
40 ** The configure option `--without-compress-info' has been generalized,
41 and renamed to `--without-compress-install'. It now prevents compression
42 of _any_ files during installation.
45 ** The configure option `--with-crt-dir' has been removed.
46 It is no longer needed, as the crt*.o files are no longer linked specially.
49 ** Directories passed to configure option `--enable-locallisppath' are
50 no longer created during installation.
52 ** Emacs can be compiled with zlib support.
53 If this library is present (which it normally is on most systems), the
54 function `zlib-decompress-region' becomes available, which can
55 decompress gzip- and zlib-format compressed data.
58 ** Emacs for NS (Mac OS X, GNUstep) can be built with ImageMagick support.
59 This requires pkg-config to be available at configure time.
62 * Startup Changes in Emacs 24.4
65 ** When initializing `load-path', an empty element in the EMACSLOADPATH
66 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
67 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
68 load-path (the one that would have been used if EMACSLOADPATH was unset).
69 This makes it easier to _extend_ the load-path via EMACSLOADPATH
70 (previously, EMACSLOADPATH had to specify the complete load-path,
71 including the defaults). (In older versions of Emacs, an empty element
72 was replaced by ".", so use an explicit "." now if that is what you want.)
75 ** The -L option, which normally prepends its argument to load-path,
76 will instead append, if the argument begins with `:' (or `;' on MS Windows;
77 i.e., `path-separator').
80 ** If you use either site-load.el or site-init.el to customize the dumped
81 Emacs executable, any changes to `load-path' that these files make
82 will no longer be present after dumping. To affect a permanent change
83 to `load-path', use the `--enable-locallisppath' option of `configure'.
86 ** The user option `initial-buffer-choice' can now specify a function
87 to set up the initial buffer.
90 * Changes in Emacs 24.4
93 ** New option `gnutls-verify-error', if non-nil, means that Emacs
94 should reject SSL/TLS certificates that GnuTLS determines as invalid.
95 (This option defaults to nil at present, but this is expected to change
99 ** Emacs now supports menus on text-mode terminals.
100 If the terminal supports a mouse, clicking on the menu bar, or on
101 sensitive portions of the mode line or header line, will drop down the
102 menu defined at that position. Likewise, clicking C-mouse-2 or
103 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
106 If the text terminal does not support a mouse, you can activate the
107 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
109 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
110 customize the option `tty-menu-open-use-tmm' to a non-nil value.
111 (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
115 ** The *Messages* buffer is created in `messages-buffer-mode',
116 a new major mode, with read-only status. Any code that might create
117 the *Messages* buffer should call the function `messages-buffer' to do
118 so and set up the mode.
120 ** Emacs now supports ACLs (access control lists).
122 *** Emacs preserves the ACL entries of files when backing up.
124 *** New functions `file-acl' and `set-file-acl' get and set the ACL
125 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
126 libacl. On MS-Windows, the NT Security APIs are used to emulate the
127 POSIX ACL interfaces.
129 ** Multi-monitor support has been added.
131 *** New functions `display-monitor-attributes-list' and
132 `frame-monitor-attributes' can be used to obtain information about
133 each physical monitor on multi-monitor setups.
135 *** The functions `display-pixel-width' and `display-pixel-height' now
136 behave consistently among the platforms: they return the pixel width
137 or height for all physical monitors associated with the given display
138 as if they were on X11. To get information for each physical
139 monitor, use the new functions above. Similar notes also apply to
140 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
141 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
144 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
145 You can change the default by customizing `blink-cursor-blinks'.
148 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
149 This affects View mode, etc.
154 *** The command `apropos-variable' is renamed to `apropos-user-option'.
155 `apropos-user-option' shows all user options while `apropos-variable'
156 shows all variables. When called with a universal prefix argument,
157 the two commands swap their behaviors. When `apropos-do-all' is
158 non-nil, they output the same results.
161 *** The key `?' now describes prefix bindings, like `C-h'.
164 *** The command `describe-function' has been extended for EIEIO.
165 Running it on constructors will show a full description of the
166 generated class. For generic functions, it will show all
167 implementations together with links to the source. The old commands
168 `describe-class', `describe-constructor' and `describe-generic' were
172 *** The function `quail-help' is no longer an interactive command.
173 Use `C-h C-\' (`describe-input-method') instead.
178 *** ImageMagick images now support the :max-width and :max-height keywords.
181 *** When using `create-image' with image data, you can pass a :format
182 attribute (via the property-list argument) in order to help
183 ImageMagick detect the image type. The value should be a MIME
184 content-type that is found in the new variable `image-format-suffixes'.
186 ** Frame and window changes
189 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
190 bound to <f11> and M-<f10>, respectively.
193 *** New hooks `focus-in-hook', `focus-out-hook'.
194 These are normal hooks run when an Emacs frame gains or loses input focus.
197 *** Emacs can now draw dividers between adjacent windows.
198 To put dividers between side-by-side/vertically stacked windows
199 customize the frame parameter `right-divider-width'/`bottom-divider-width'
200 to some positive integer. You can drag dividers with the mouse
201 (they show a corresponding cursor when the mouse hovers over them).
202 You can change the appearance of dividers by customizing the faces
203 `window-divider', `window-divider-first-pixel', and
204 `window-divider-last-pixel'. The last two are useful to provide a 3D
205 effect, or to better distinguish dividers from surrounding display objects.
208 *** `split-window' is now a non-interactive function, not a command.
209 As a command, it was a special case of `C-x 2' (`split-window-below'),
210 and as such superfluous. After being reimplemented in Lisp, its
211 interactive form was mistakenly retained.
214 *** New option `scroll-bar-adjust-thumb-portion'.
215 Available only on X, this option allows to control over-scrolling
216 using the scroll bar (i.e. dragging the thumb down even when the end
217 of the buffer is visible).
219 ** Lisp evaluation changes
221 *** `eval-defun' on an already defined defcustom calls the :set function,
225 *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
226 and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
227 zero prefix argument. This disables truncation of lists in the output,
228 equivalent to setting `(eval-expression-)print-length' and
229 `(eval-expression-)print-level' to nil. Additionally, it causes integers
230 to be printed in other formats (octal, hexadecimal, and character).
233 *** New hook `eval-expression-minibuffer-setup-hook' run by
234 `eval-expression' on entering the minibuffer.
237 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
240 ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
241 because it affects caching of paragraph scanning results as well.
242 There is no reason to set this to nil except for debugging purposes.
245 ** The option `set-mark-default-inactive' has been deleted.
246 This unfinished feature was introduced by accident in Emacs 23.1;
247 simply disabling Transient Mark mode does the same thing.
250 ** The default value of `comment-use-global-state' is now t,
251 and this variable has been marked obsolete.
254 ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
255 and works for git too, if you fetch the repository notes.
258 ** New option `load-prefer-newer' affects how the `load' function chooses
259 the file to load. If this is non-nil, then when both .el and .elc
260 versions of a file exist, and the caller did not explicitly specify
261 which one to load, then the newer file is loaded. The default, nil,
262 means to always load the .elc file.
265 * Editing Changes in Emacs 24.4
267 ** Indentation changes
270 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
271 When invoked without a prefix argument, it now activates a transient
272 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
273 the text indentation in the region. Typing any other key resumes
274 normal editing behavior.
276 *** `electric-indent-mode' is enabled by default.
279 *** `tab-stop-list' is now implicitly extended to infinity by repeating
280 the last step. Its default value is changed to nil, which means a tab
281 stop every `tab-width' columns.
284 ** New command `cycle-spacing' acts like a smarter `just-one-space'.
285 When called in succession, it cycles between spacing conventions:
286 one space, no spaces, original spacing.
289 ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
290 a line after a one-letter word, which is an error in some typographical
291 conventions. To use it, add it to the `fill-nobreak-predicate' hook.
294 ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
296 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
297 Most commands are still unaware of it, but kill/yank do work on the rectangle.
300 ** New option `visual-order-cursor-movement'.
301 If this is non-nil, cursor motion with arrow keys will follow the
302 visual order of characters on the screen: <left> always moves to the
303 left, <right> always moves to the right, disregarding the surrounding
304 bidirectional context.
309 *** All interactive commands that read a register (`copy-to-register', etc.)
310 now display a temporary window after `register-preview-delay' seconds
311 that summarizes existing registers. To disable this, set that option to nil.
312 Interactive commands that read registers and want to make use of this
313 should use `register-read-with-preview' to read register names.
315 *** New command `frameset-to-register' bound to `C-x r f', replacing
316 `frame-configuration-to-register'. It offers similar functionality,
317 plus enhancements like the ability to restore deleted frames.
318 (`frame-configuration-to-register' still exists, but no longer has a
322 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
326 ** New command `delete-duplicate-lines'.
327 This searches the region for identical lines, and removes all but one
328 copy of each repeated line. The lines need not be sorted.
331 * Changes in Specialized Modes and Packages in Emacs 24.4
334 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
336 ~/.emacs.d/timelog replaces ~/.timelog
337 ~/.emacs.d/vip replaces ~/.vip
338 ~/.emacs.d/viper replaces ~/.viper
339 ~/.emacs.d/ido.last replaces ~/.ido.last
340 ~/.emacs.d/kkcrc replaces ~/.kkcrc
341 ~/.emacs.d/quickurls replaces ~/.quickurls
342 ~/.emacs.d/idlwave/ replaces ~/.idlwave/
343 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
344 ~/.emacs.d/places replaces ~/.emacs-places
345 ~/.emacs.d/shadows replaces ~/.shadows
346 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
347 ~/.emacs.d/strokes replaces ~/.strokes
348 ~/.emacs.d/notes replaces ~/.notes
349 ~/.emacs.d/type-break replaces ~/.type-break
350 Also the following files used by the now obsolete otodo-mode.el:
351 ~/.emacs.d/todo-do replaces ~/.todo-do
352 ~/.emacs.d/todo-done replaces ~/.todo-done
353 ~/.emacs.d/todo-top replaces ~/.todo-top
355 ** Backtrace and debugger
358 *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
359 display of local variables of the current stack frame.
361 *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
362 the lexical environment when evaluating the code in the context at point
363 (and so allows you to access lexical variables).
366 *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
369 ** Battery information can now be retrieved from BSD's `apm' utility.
372 ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
374 ** Calendar and Diary
377 *** New faces `calendar-weekday-header', `calendar-weekend-header',
378 and `calendar-month-header'.
381 *** New option `calendar-day-header-array'.
384 *** New variable `diary-from-outlook-function', used by the command
385 `diary-from-outlook'.
388 *** The variable `calendar-font-lock-keywords' is obsolete.
393 *** Calc by default now uses the Gregorian calendar for all dates, and
394 uses January 1, 1 AD as its day number 1. Previously Calc used the
395 Julian calendar for dates before September 14, 1752, and it used
396 December 31, 1 BC as its day number 1; the new scheme is more
397 consistent with Calendar's calendrical system and day numbering.
400 *** The new option `calc-gregorian-switch' lets you configure if
401 (and when) Calc switches from the Julian to the Gregorian calendar.
404 *** Support for ISO 8601 dates.
410 **** The cpp-root project now supports executing a compile command.
411 It can be set through the new :compile-command slot or the
412 buffer-local variable `compile-command'.
414 **** Better selection of include directories for the 'linux' project.
415 Include directories now support out-of-tree build directories and
416 target architecture auto-detection.
420 **** Improved detection of used namespaces in current scope in C++.
422 **** Parsing of default values for variables and function arguments in C/C++.
423 They are also displayed by the summarize feature in the mode line.
425 **** Improved parsing of function pointers in C/C++.
426 This also includes parsing of function pointers as function arguments.
428 **** Parsing of C/C++ preprocessor macros that open new scope.
429 For example, this enables parsing of macros that open new namespaces.
431 **** Support for 'this' pointer in inline member functions in C++.
436 *** New macro `cl-tagbody'.
437 This executes statements while allowing for control transfer to labels.
440 *** letf is now just an alias for cl-letf.
445 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
446 Hence, you can now enable it independently from those modes, and from
447 `transient-mark-mode'.
450 *** `cua-highlight-region-shift-only' is now obsolete.
451 You can disable `transient-mark-mode' to get the same result.
454 *** CUA's rectangles can now be used without CUA by calling the command
455 `cua-rectangle-mark-mode'.
460 *** Support for completion, ElDoc, and Flycheck has been added.
463 *** The current CFEngine syntax is parsed from "cf-promises -s json".
464 There is a fallback syntax available if you don't have cf-promises or
465 if your version doesn't support that option. See option `cfengine-cf-promises'.
468 ** Delete Selection mode can now be used without Transient Mark mode.
473 *** `desktop-save-mode' by default now auto-saves an existing desktop file
474 after `desktop-auto-save-timeout'. To disable this, customize that option
477 *** `desktop-restore-frames', enabled by default, allows saving and
478 restoring the frame/window configuration (frameset). Additional options
479 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
480 and `desktop-restore-forces-onscreen' offer further customization.
483 ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
484 such as file ownership or permissions, are visible.
487 ** You can enable ElDoc inside the `eval-expression' minibuffer with:
488 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
489 The results display in the mode line.
491 ** Electric Pair mode
494 *** New option `electric-pair-preserve-balance', enabled by default.
495 If non-nil, pairing/skipping only kicks in when that help the balance
496 of parentheses and quotes, i.e. the buffer should end up at least as
499 You can further control this behavior by adjusting the predicates
500 stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
503 *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
504 In `electric-pair-mode', the commands `backward-delete-char' and
505 `backward-delete-char-untabify' are now bound to electric variants
506 that delete the closer when invoked between adjacent pairs.
509 *** New option `electric-pair-open-newline-between-pairs', enabled by default.
510 In `electric-pair-mode', inserting a newline between adjacent pairs
511 opens an extra newline after point, which is indented if
512 `electric-indent-mode' is also set.
515 *** New option `electric-pair-skip-whitespace', enabled by default.
516 This controls if skipping over closing delimiters should jump over any
517 whitespace slack. Setting it to `chomp' makes it delete this
518 whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
521 *** New variables control the pairing in strings and comments.
522 You can customize `electric-pair-text-pairs' and
523 `electric-pair-text-syntax-table' to tweak pairing behavior inside
524 strings and comments.
527 ** New EPA option `epa-mail-aliases'.
528 You can set this to a list of email address aliases that `epa-mail-encrypt'
529 should use to find keys.
532 ** New ERC option `erc-accidental-paste-threshold-seconds'.
533 If set to a number, this can be used to avoid accidentally pasting large
534 amounts of data into the ERC input.
537 ** New ERT macro `skip-unless' allows skipping ERT tests.
538 See the ERT manual for details.
543 *** `eshell' now supports visual subcommands and options.
544 Eshell has been able to handle "visual" commands (interactive,
545 non-line oriented commands such as top that require display
546 capabilities not provided by eshell) by running them in an Emacs
547 terminal emulator. See `eshell-visual-commands'.
549 This feature has been extended to subcommands and options that make a
550 usually line-oriented command a visual command. Typical examples are
551 "git log" and "git <command> --help", which display their output in a
552 pager by default. See `eshell-visual-subcommands' and
553 `eshell-visual-options'.
556 *** New Eshell-Tramp module.
557 External su and sudo commands are now the default; the internal,
558 Tramp-using variants can still be used by enabling the eshell-tramp
562 ** New F90 mode option `f90-smart-end-names'.
565 Icomplete is now more similar to Ido.
568 *** Icomplete by default now applies to all forms of minibuffer completion.
569 The variable `icomplete-with-completion-tables' (now a user option)
570 controls this. To restore the old behavior, set it back to
571 '(internal-complete-buffer).
574 *** You can navigate through and select completions using the keys
575 from `icomplete-minibuffer-map'.
578 *** The string that separates potential completions is now a customizable
579 option (`icomplete-separator'). The default is " | " rather than ",".
582 *** New face `icomplete-first-match'; and new options
583 `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
586 *** The option `icomplete-show-key-bindings' has been removed.
591 *** An Ido user manual is now included.
594 *** The option `ido-use-virtual-buffers' can now take the value `auto'.
595 This means to use virtual buffers if the current ido input does not match
599 *** The variable `ido-decorations' can optionally have two new elements,
600 which are the brackets to use around the sole remaining completion.
605 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
606 visit the next image file and the previous image file in the same
607 directory, respectively.
610 *** New commands to show specific frames of multi-frame images.
611 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
612 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
615 *** New commands to speed up, slow down, or reverse animation.
616 `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
617 speed up and slow down the animation. `a r' (`image-reverse-speed')
618 to reverse it and `a 0' (`image-reset-speed') to reset it.
621 *** The command `image-mode-fit-frame' deletes other windows.
622 When toggling, it restores the frame's previous window configuration.
623 It also has an optional frame argument, which can be used by Lisp
624 callers to fit the image to a frame other than the selected frame.
629 *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
630 the symbol found near point.
633 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
634 will cycle through faces in `hi-lock-face-defaults' without prompting.
636 ** New Imenu option `imenu-generic-skip-comments-and-strings'.
641 *** New Info face `info-index-match', used to highlight matches in index
642 entries displayed by `Info-index-next', `Info-virtual-index' and
646 *** The Info-edit command is obsolete. Editing Info nodes by hand
647 has not been relevant for some time.
652 *** New option `js-switch-indent-offset'.
655 *** Better indentation of multiple-variable declarations.
656 If a declaration spans several lines, variables on the following lines
657 are lined up to the first one.
660 *** Recognition and better indentation of continuations in array comprehensions.
663 ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
668 *** Font locking for texinfo comments and new keywords.
670 *** Completion in Octave file buffers.
674 *** Jump to definition.
676 *** Documentation lookup/search.
679 ** OPascal mode is the new name for Delphi mode
682 *** All delphi-* variables and functions have been renamed to opascal-*.
683 Obsolete aliases exist for those likely to have been used externally.
686 *** The option `delphi-newline-always-indents' has been removed.
687 Use `electric-indent-mode' instead.
690 *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
695 *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
696 to filter the list of packages by a keyword.
699 *** In the `describe-package' buffer, there are now buttons listing the
700 keywords related to the package. Click on a button to see other packages
701 related to that keyword.
704 *** The format of `archive-contents' files, generated by package
705 repositories, has changed to allow a new (fifth) element in the data
706 vectors, containing an associative list with extra properties.
707 (For example, `describe-package' uses the `:url' extra property to
708 display a "Homepage" header.)
711 ** In Prolog mode, `prolog-use-smie' has been removed,
712 along with the non-SMIE indentation code.
717 *** The new command `remember-notes' creates a buffer that is saved on exit.
718 You can use it as a more permanent *scratch* buffer.
721 *** Remember can now store notes in separate files.
722 To use this, add `remember-store-in-files' to the `remember-handler-functions'
723 option. The files are saved in `remember-data-directory' using
724 names specified by `remember-directory-file-name-format'.
728 *** Customize `rmail-mbox-format' to influence some minor aspects of
729 how Rmail displays non-MIME messages.
732 *** The `unrmail' command now converts from BABYL to mboxrd format,
733 rather than mboxo. Customize `unrmail-mbox-format' to change this.
738 *** Improved syntax highlighting and indentation.
741 *** New `electric-indent-mode' integration.
744 *** New option `ruby-encoding-magic-comment-style'.
747 *** New option `ruby-custom-encoding-magic-comment-template'.
750 *** New option `ruby-align-to-stmt-keywords'.
753 *** New option `ruby-align-chained-calls'.
756 *** More Ruby file types have been added to `auto-mode-alist'.
758 ** Search and Replace
761 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
762 starts a symbol (identifier) incremental search forward with the
763 symbol found near point added to the search string initially.
766 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
767 and adds it to the search string.
769 *** `M-s i' in Isearch mode toggles whether search matches invisible text.
771 *** `query-replace' skips invisible text when `search-invisible' is nil,
772 and opens overlays with hidden text when `search-invisible' is `open'.
775 *** A negative prefix arg of replacement commands replaces backward.
776 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
777 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
780 *** By default, prefix arguments do not now terminate Isearch mode.
781 Set `isearch-allow-prefix' to nil to restore old behavior.
784 *** More Isearch commands accept prefix arguments, namely
785 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
789 *** Word search now matches whitespace at the beginning/end
790 of the search string if it contains leading/trailing whitespace.
791 In an incremental word search or when using a non-nil LAX argument
792 of `word-search-regexp', the lax matching can also match part of
793 the first word (in addition to the lax matching of the last word).
794 The same rules are now applied to the symbol search with the difference
795 that it matches symbols, and non-symbol characters between symbols.
798 ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
801 ** The shell.el option `explicit-bash-args' includes --noediting by default.
802 All non-ancient Bash versions support this option.
807 *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
810 *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
812 ** SMIE indentation can be customized via `smie-config'.
813 Emacs can learn the appropriate indentation settings if you provide it
814 with an indented sample file.
818 Improved login monitoring and appropriate response to login failures.
819 Includes `sql-login-delay' to define maximum wait for a connection.
822 SQL*Plus script placeholders are properly highlighted and identified
823 in `sql-placeholders-filter' correctly. When SQL*Plus is started,
824 options specified in `sql-oracle-options' are passed before the logon
825 parameter, as SQL*Plus expects. The default setting for
826 `sql-oracle-options' has been altered to pass the `-L' option to limit
827 the number of logon attempts per invocation.
830 ** New Term mode option `term-suppress-hard-newline'.
833 ** Todo mode has been rewritten and enhanced.
834 The Todo mode user manual describes all commands and most user
835 options. To support some of these features, a new file format is
836 used, which is incompatible with the old format; however, you can
837 convert old todo and done item files to the new format on initializing
838 the first new todo file, or at any later time with the provided
839 conversion command. The previous version of todo-mode.el has been
840 renamed to otodo-mode.el and is now obsolete. New features include:
842 *** Support for multiple todo files and archive files of done items.
844 *** Renaming, reordering, moving, merging, and deleting categories.
846 *** Sortable tabular summaries of categories and the item types they contain.
848 *** Cross-category lists of items filtered by specific criteria.
850 *** More fine-grained interaction with the Emacs diary, by being able to
851 decide for each todo item whether it appears in the Fancy Diary display.
853 *** Highly flexible new item insertion and item editing.
855 *** Moving items between categories, storing done items in their category
856 or in archive files, undoing or unarchiving done items.
858 *** Reprioritizing items by inputting a numerical priority.
860 *** Extensive customizability of operation and display, including many faces.
865 *** `trace-function' and `trace-function-background' no longer prompt for
866 the output buffer. Unless you use a prefix argument, they output to
870 *** With a prefix argument, `trace-function' and `trace-function-background'
871 will prompt for a "context". This is a Lisp expression, whose value at the
872 time the function is entered/exited is printed along with the function's
878 *** The experimental url syntax for remote file names has been removed.
881 *** New connection method "adb", which allows to access Android
882 devices by the Android Debug Bridge. The variable `tramp-adb-program'
883 can be used to adapt the path of the "adb" program, if needed.
886 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
887 "scpc" and "rsyncc" are discontinued. The ssh option
888 "ControlMaster=auto" is set automatically in all ssh-based methods,
889 when possible. See `tramp-use-ssh-controlmaster-options'.
892 *** Handlers for `file-acl' and `set-file-acl' for remote machines
893 which support POSIX ACLs.
896 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
897 for remote machines which support filesystem notifications.
900 ** New URL command `url-cookie-list' displays the current cookies,
901 and allows you to interactively remove cookies.
903 ** VC and related modes
906 *** In VC directory mode, `D' displays diffs between VC-controlled
907 whole tree revisions.
910 *** In VC directory mode, `L' lists the change log for the current VC
911 controlled tree in a window.
914 *** In VC directory mode, `I' shows a log of changes that will be
915 received with a pull operation.
918 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
919 under current version control system. When called with a prefix
920 argument, you can remove a file from the ignored file list.
925 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
928 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
931 ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
932 are obsolete. Customize the `woman-*' faces instead.
937 *** iswitchb.el; use icomplete-mode.
940 *** longlines.el; use visual-line-mode.
949 *** terminal.el; use term.el instead.
952 *** the old version of todo-mode.el (renamed to otodo-mode.el).
955 *** xesam.el (owing to the cancellation of the XESAM project).
958 *** yow.el; use fortune.el or cookie1.el instead.
961 * New Modes and Packages in Emacs 24.4
964 ** New package `eww' is a built-in web browser.
965 It is only available if Emacs is compiled with libxml2 support.
968 ** New minor mode `superword-mode'.
969 This overrides the default word motion commands to treat "symbol_words"
970 as a single word, similar to what `subword-mode' does.
973 ** New package nadvice.el offers lighter-weight advice facilities.
976 *** add-function/remove-function, which can be used to add/remove code on any
977 function-carrying place, such as process-filters or `<foo>-function' hooks.
979 *** advice-add/advice-remove to add/remove a piece of advice on a named
980 function, much like `defadvice' does.
982 ** New package frameset.el.
983 It provides a set of operations to save a frameset (the state of all
984 or a subset of the existing frames and windows, somewhat similar to a
985 frame configuration), both in-session and persistently, and restore it
986 at some point in the future.
989 ** New package filenotify.el provides an interface for file system
990 notifications. It requires that Emacs be compiled with one of the
991 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
994 * Incompatible Lisp Changes in Emacs 24.4
997 ** `kill-region' has lost its `yank-handler' optional argument.
1000 ** `(input-pending-p)' no longer runs other timers that are ready to run.
1001 The new optional CHECK-TIMERS parameter allows for the prior behavior.
1004 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
1007 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
1008 Some languages match those as »...«, and others as «...», so it is
1009 better for Emacs to stay neutral by default.
1012 ** In compiled Lisp files, the header no longer includes a timestamp.
1015 ** The default file coding for Emacs Lisp files is now utf-8.
1016 (See `file-coding-system-alist'.) In most cases, this change is
1017 transparent, but files that contain unusual characters without
1018 specifying an explicit coding system may fail to load with obscure
1019 errors. You should either convert them to utf-8 or add an explicit
1023 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
1024 It used to disable the minor mode, major mode, and text-property keymaps,
1025 whereas now it simply has higher precedence.
1027 ** Default process filters and sentinels are not nil any more.
1028 Instead they default to a function that does what the nil value used to do.
1031 ** `read-event' does not return decoded chars in ttys any more.
1032 As was the case in Emacs 22 and before, the decoding of terminal
1033 input, according to `keyboard-coding-system', is not performed in
1034 `read-event' any more. But unlike in Emacs 22, this decoding is still
1035 done before input-decode-map, function-key-map, etc.
1038 ** The option `inhibit-local-menu-bar-menus' has been removed.
1041 ** Frame-local variables that affect redisplay do not work any more.
1042 More specifically, redisplay does not bother to check for a frame-local
1043 value when looking up variables.
1046 ** nil and "unbound" are indistinguishable in `symbol-function'.
1047 `symbol-function' does not signal a `void-function' error any more.
1048 To determine if a symbol's function definition is void, use `fboundp'.
1051 ** `defadvice' does not honor the `freeze' flag and cannot advise
1052 special-forms any more.
1055 ** `dolist' no longer binds VAR while evaluating the RESULT form,
1056 when lexical binding is enabled. Previously, VAR was bound to nil,
1057 which often led to spurious unused-variable warnings.
1060 ** The return value of `backup-buffer' has changed.
1061 The second argument is no longer an SELinux context, instead it is an
1062 alist of extended attributes as returned by the new function
1063 `file-extended-attributes'. The attributes can be applied to another
1064 file using `set-file-extended-attributes'.
1067 ** By default `copy-file' no longer copies file permission bits to an
1068 existing destination; and it sets the file permission bits of a newly
1069 created destination to those of the source, masked by the default file
1070 permissions. To copy the file permission bits, pass t as the
1071 PRESERVE-PERMISSIONS argument of `copy-file'.
1074 ** `visited-file-modtime' now returns -1 for nonexistent files.
1075 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1076 in the presence of files with negative time stamps.
1079 ** The cars of the elements in `interpreter-mode-alist' are now
1080 treated as regexps rather than literal strings.
1083 * Lisp Changes in Emacs 24.4
1086 ** The second argument of `eval' can now specify a lexical environment.
1089 ** New functions `special-form-p' and `macrop'.
1091 ** New macro `define-alternatives' can be used to define generic commands.
1092 Generic commands are interactive functions whose implementation can be
1093 selected among several alternatives, as a matter of user preference.
1096 ** If you give a symbol a `defalias-fset-function' property, `defalias'
1097 on that symbol will use the associated value as a function to call
1101 ** New variable `enable-dir-local-variables'.
1102 Directory-local variables are ignored if this is nil. This may be
1103 useful for modes that want to ignore directory-locals while still
1104 respecting file-local variables.
1107 ** New function `get-pos-property'.
1110 ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1111 as a function to call to provide default values.
1113 ** Completion changes
1115 *** The separator for `completing-read-multiple' can now be a regexp.
1116 The default separator has been changed to allow surrounding spaces
1119 *** The `common-substring' arg of `display-completion-list' is obsolete.
1120 Either use `completion-all-completions', which returns highlighted
1121 strings (including for partial or substring completion), or call
1122 `completion-hilit-commonality' to add the highlight.
1124 *** New function `completion-table-with-cache' is a wrapper for
1125 `completion-table-dynamic' that caches the result of the last lookup.
1127 *** New function `completion-table-merge' to combine several
1128 completion tables by merging their completions.
1130 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1131 let you enable symbol prettification (replacing a string like "lambda" with
1132 the Greek lambda character).
1137 *** Functions to pop up menus and dialogs now work on all terminals,
1138 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1139 `message-box', `yes-or-no-p', etc.
1141 The function `display-popup-menus-p' will now return non-nil for a
1142 display or frame whenever a mouse is supported on that display or
1145 *** New hook `tty-setup-hook'.
1149 *** New display action function `display-buffer-no-window' to not
1150 display the buffer in a window.
1152 *** New display action alist entry `allow-no-window' to indicate the
1153 caller of `display-buffer' is ready to handle the case of not
1154 displaying the buffer in a window.
1156 ** New hook `pre-redisplay-function'.
1159 ** New bool-vector set operation functions
1160 *** `bool-vector-exclusive-or'
1161 *** `bool-vector-union'
1162 *** `bool-vector-intersection'
1163 *** `bool-vector-set-difference'
1164 *** `bool-vector-not'
1165 *** `bool-vector-subsetp'
1166 *** `bool-vector-count-consecutive'
1167 *** `bool-vector-count-population'
1170 ** Comparison functions =, <, >, <=, >= can now take many arguments.
1172 ** Error-handling changes
1175 *** New function `define-error'.
1178 *** `with-demoted-errors' takes an additional argument `format'.
1181 ** New macro `with-eval-after-load'.
1182 This is like the old `eval-after-load', but better behaved.
1185 ** New library subr-x.el with miscellaneous small utility functions
1186 *** `hash-table-keys'
1187 *** `hash-table-values'
1188 *** `string-blank-p'
1189 *** `string-empty-p'
1191 *** `string-reverse'
1192 *** `string-trim-left'
1193 *** `string-trim-right'
1195 *** `string-remove-prefix'
1196 *** `string-remove-suffix'
1199 ** Obsoleted functions
1202 *** `lisp-complete-symbol'
1203 *** `field-complete'
1204 *** `minibuffer-completion-contents'
1205 *** `isearch-nonincremental-exit-minibuffer'
1206 *** `isearch-filter-visible'
1207 *** `generic-make-keywords-list'
1208 *** `get-upcase-table' (use `case-table-get-table' instead).
1210 ** `with-wrapper-hook' is obsoleted by `add-function'.
1211 The few hooks that used with-wrapper-hook are replaced as follows:
1212 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1213 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1214 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1217 ** `byte-compile-interactive-only-functions' is now obsolete.
1218 To specify that a command should only be called interactively, give it
1219 a non-nil `interactive-only' property.
1222 ** `split-string' now takes an optional argument TRIM.
1223 The value, if non-nil, is a regexp that specifies what to trim from
1224 the start and end of each substring.
1227 ** New function `string-suffix-p'.
1229 ** File-handling changes
1232 *** Support for filesystem notifications.
1233 Emacs now supports notifications of filesystem changes, such as
1234 creation, modification, and deletion of files. This requires the
1235 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1236 MS-Windows systems, this is supported for Windows XP and newer
1240 *** The 9th element returned by `file-attributes' is now unspecified.
1241 Formerly, it was t if the file's gid would change if file were deleted
1242 and recreated. This value has been inaccurate for years on many
1243 platforms, and nobody seems to have noticed or cared.
1246 *** The 6th argument to `copy-file' has been renamed to
1247 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1248 Unix file permission bits as well as SELinux context.
1251 *** The function `file-ownership-preserved-p' now has an optional
1252 argument GROUP which causes it check for file group too. This can be
1253 used in place of the 9th element of `file-attributes'.
1256 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1257 argument, with the same interpretation as the returned value of
1258 `visited-file-modtime'.
1260 ** Autorevert changes
1263 *** If Emacs is compiled with file notification support, notifications
1264 are used instead of checking the time stamp of the files. You can
1265 disable this by setting the user option `auto-revert-use-notify' to
1266 nil. Alternatively, a regular expression of directories to be
1267 excluded from file notifications can be specified by
1268 `auto-revert-notify-exclude-dir-regexp'.
1271 *** The new user option `auto-revert-remote-files' enables reversion
1272 of remote files when set to non-nil.
1276 *** The function `face-spec-set' is now like `setq' for face specs.
1277 Its third arg now accepts values specifying a face spec type (defface,
1278 custom, or override spec), and the relevant spec is set accordingly.
1281 *** New function `add-face-text-property', which can be used to
1282 conveniently prepend/append new face properties.
1284 *** Face specs set via Custom themes now replace the `defface' spec
1285 rather than inheriting from it (as do face specs set via Customize).
1287 *** New face characteristic (supports :underline (:style wave))
1288 specifies whether or not the terminal can display a wavy line.
1291 *** New face spec attribute :distant-foreground
1292 specifies foreground to use if background color is near the foreground
1293 color that would otherwise have been used.
1298 *** `image-animated-p' is now `image-multi-frame-p'.
1299 It returns non-nil for any image that contains multiple frames,
1300 whether or not it specifies a frame delay.
1303 *** New variable `image-default-frame-delay' gives the frame delay for
1304 animated images which do not specify a frame delay.
1307 *** New functions `image-current-frame' and `image-show-frame' for getting
1308 and setting the current frame of a multi-frame image.
1313 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1314 **** object-name -> eieio-object-name
1315 **** object-class -> eieio-object-class
1316 **** object-class-fast -> eieio--object-class
1317 **** object-class-name -> eieio-object-class-name
1318 **** object-name-string -> eieio-object-name-string
1319 **** object-num-slots -> eieio--object-num-slots
1320 **** object-set-name-string -> eieio-object-set-name-string
1321 **** class-of -> eieio-object-class
1322 **** class-name -> eieio-class-name
1323 **** class-parent -> eieio-class-parent
1324 **** class-parents -> eieio-class-parents
1325 **** class-parents-fast -> eieio-class-parents-fast
1326 **** class-children -> eieio-class-children
1327 **** class-num-slots -> eieio--class-num-slots
1328 **** class-precedence-list -> eieio-class-precedence-list
1329 **** class-direct-subclasses -> eieio-class-children
1330 **** class-direct-superclasses -> eieio-class-parents
1332 ** Changes in encoding and decoding of text
1335 *** New coding-system `prefer-utf-8'.
1336 This is like `undecided' but prefers UTF-8 on decoding if the text to
1337 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1338 any non-ASCII characters are automatically encoded as UTF-8.
1341 *** New attributes of coding-systems whose type is `undecided'.
1342 Two new attributes, `:inhibit-null-byte-detection' and
1343 `:inhibit-iso-escape-detection', determine how to detect encoding of
1344 text that includes null bytes and ISO-2022 escape sequences,
1345 respectively. Each of these attributes can be either nil, zero, or
1346 t. If it is t, decoding text ignores null bytes and, respectively,
1347 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1348 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1349 text is encoded in one of the ISO-2022 encodings, such as
1350 iso-2022-7bit. If the value is zero, Emacs consults the variables
1351 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1353 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1354 UTF-8 encoding and decoding, whenever possible.
1356 These attributes are only meaningful for coding-systems of type
1357 `undecided'. (The type of a coding-system is determined by its
1358 `:coding-type' attribute and can be accessed by calling the
1359 `coding-system-type' function.)
1362 ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1365 ** New functions `group-gid' and `group-real-gid'.
1368 ** The spelling of the rx.el category `chinese-two-byte' has been
1369 corrected (the first 'e' was missing).
1372 ** Minor internal changes to the details of lock files.
1373 The lock for DIR/FILE is now _always_ DIR/.#FILE.
1374 If DIR/.#FILE already exists and is not an Emacs lock file,
1375 Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1376 numbered lock files DIR/.#FILE.0...).
1377 On file systems that do not support symbolic links, the lock is now a
1378 regular file with contents being what would have been in the symlink.
1380 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1383 *** The package descriptor and name of global variables, constants,
1384 and functions should be separated by two hyphens if the symbol is not
1385 meant to be used by other packages.
1388 * Changes in Emacs 24.4 on Non-Free Operating Systems
1391 ** The procedure for building Emacs on MS-Windows has changed.
1392 It is now built by running the same configure script as on all other
1393 platforms. This requires the MSYS environment and MinGW development
1394 tools. See the updated instructions in nt/INSTALL for details.
1396 Using the Posix configure script and Makefile's also means a change in
1397 the directory structure of the Emacs installation on Windows. It is
1398 now the same as on GNU and Unix systems. In particular, the auxiliary
1399 programs, such as cmdproxy.exe and hexl.exe, are in
1400 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1401 version), version-independent site-lisp is in share/emacs/site-lisp,
1402 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1403 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1404 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1405 directories and will find the files in there automatically; there's no
1406 need to set any variables due to this change.)
1409 ** Emacs on Windows 2000 and later can now access files and directories
1410 whose names cannot be encoded in the current system codepage.
1412 The new variable `w32-unicode-filenames' controls this feature: if it
1413 is t, Emacs uses Unicode APIs to pass file names to system calls,
1414 which lifts the limitation of file names to the current locale.
1417 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1418 The backtrace is written to the 'emacs_backtrace.txt' file in the
1419 directory where Emacs was running.
1422 ** The variable `buffer-file-type' is no longer supported.
1423 Setting it has no effect, and %t in the mode-line format is ignored.
1424 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1425 modifying it has no effect.
1428 ** Lock files now work on MS-Windows.
1429 This helps to prevent losing your edits if the same file is being
1430 edited in another Emacs session or by another user. See the node
1431 "Interlocking" in the Emacs User Manual for the details. To disable
1432 file locking, customize `create-lockfiles' to nil.
1434 ** New Core Text based font backend for Mac OS X 10.5 and newer.
1435 GNUstep and Mac OS X 10.4 use the old font backend.
1436 To use the old backend by default, do on the command line:
1437 % defaults write org.gnu.Emacs FontBackend ns
1439 ** Improved fullscreen support on Mac OS X.
1440 Emacs supports both native (Mac OS X 10.7 and newer) and "old style" fullscreen.
1441 Customize `ns-use-native-fullscreen' to change the style.
1442 For Mac OS X 10.7 and newer, native is the default.
1444 ** On Mac OS X 10.7 and newer, Emacs uses sRGB colorspace by default.
1445 Customize `ns-use-srgb-colorspace' to disable this. Note that this
1446 does not apply to images.
1449 * Installation Changes in Emacs 24.3
1451 ** The default X toolkit is now Gtk+ version 3.
1452 If you don't pass `--with-x-toolkit' to configure, or if you use
1453 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1454 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1455 You can explicitly require a specific version by passing
1456 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1458 ** New configure option `--enable-link-time-optimization', to utilize
1459 an appropriate feature provided by GCC since version 4.5.0.
1461 ** New configure option `--without-all' to disable most of the optional
1462 features (image support, etc.) that are normally enabled by default.
1464 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1465 Emacs). If building with GCC, this enables compile-time checks that
1466 warn/give errors about possibly-questionable C code. On a recent GNU
1467 system there should be no warnings; on older and on non-GNU systems
1468 the results may be useful to developers.
1470 ** The configure option `--enable-use-lisp-union-type' has been
1471 renamed to `--enable-check-lisp-object-type', as the resulting
1472 Lisp_Object type no longer uses a union to implement the compile time
1473 check that this option enables.
1475 ** The configure option `--disable-maintainer-mode' has been removed,
1476 as it was confusingly-named and rarely useful.
1478 ** The configure options `--program-prefix', `--program-suffix', and
1479 `--program-transform-name' apply to more than just the installed
1480 binaries. Now they also affect the man pages, icons, and the
1481 etc/emacs.desktop file; but not the info pages, since this would break
1482 links between the various manuals.
1484 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1485 overwriting "emacs" in the installation bin/ directory with a link
1488 ** Emacs uses libtinfo in preference to libncurses, if available.
1490 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1491 /usr/pkg/lib to the linker search path. You must add them yourself if
1494 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1495 (from the bin and libexec directories, respectively). The former is
1496 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1499 * Startup Changes in Emacs 24.3
1501 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1502 lisp/ directory. There should not be any there anyway. If you have
1503 been adding them there, put them somewhere else; e.g., site-lisp.
1505 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1508 * Changes in Emacs 24.3
1512 *** `C-h f' (`describe-function') can now perform autoloading.
1513 When this command is called for an autoloaded function whose docstring
1514 contains a key substitution construct, that function's library is
1515 automatically loaded, so that the documentation can be shown
1516 correctly. To disable this, set `help-enable-auto-load' to nil.
1518 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1519 even after their associated libraries have been loaded (and the
1520 autoloads have been redefined as functions).
1524 *** Images displayed via ImageMagick now support transparency and the
1525 :background image specification property.
1527 *** When available, ImageMagick support is automatically enabled.
1528 It is no longer necessary to call `imagemagick-register-types'
1529 explicitly to install ImageMagick image types; that function is called
1530 automatically at startup, or when customizing an imagemagick- option.
1532 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1533 ImageMagick to view images. (You must call `imagemagick-register-types'
1534 afterwards if you do not use customize to change this.)
1536 *** The new variable `imagemagick-enabled-types' also affects which
1537 ImageMagick types are treated as images. The function
1538 `imagemagick-filter-types' returns the list of types that will be
1543 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1544 next and previous path separator, respectively.
1546 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1547 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1548 non-nil before enabling the mode.
1552 *** New option `mode-line-default-help-echo' specifies the help text
1553 (shown in a tooltip or in the echo area) for any part of the mode line
1554 that does not have its own specialized help text.
1556 *** You can now click mouse-3 in the coding system indicator to invoke
1557 `set-buffer-file-coding-system'.
1559 ** Server and client
1561 *** emacsclient now obeys string values for `initial-buffer-choice',
1562 if it is told to open a new frame without specifying any file to visit
1563 or expression to evaluate.
1565 *** New option `server-auth-key' specifies a shared server key.
1567 ** Emacs now generates backtraces on fatal errors.
1568 On encountering a fatal error, Emacs now outputs a textual description
1569 of the fatal signal, and a short backtrace on platforms like glibc
1570 that support backtraces.
1572 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1573 This minor mode replaces `toggle-read-only', which is now obsolete.
1575 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1576 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1577 respectively, without exiting from the prompt.
1579 ** In the Package Menu, newly-available packages are listed as "new",
1580 and sorted above the other "available" packages by default.
1582 ** If your Emacs was built from a repository checkout, the new variable
1583 `emacs-bzr-version' contains information about the bzr revision used.
1585 ** New option `create-lockfiles' specifies usage of lockfiles.
1586 It defaults to t. Changing it to nil inhibits the creation of lock
1587 files (use this with caution).
1589 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1590 variables on remote hosts.
1592 ** The entry for PCL-CVS has been removed from the Tools menu.
1593 The PCL-CVS commands are still available via the keyboard.
1595 ** Using "unibyte: t" in Lisp source files is obsolete.
1596 Use "coding: raw-text" instead.
1598 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1599 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1600 The previous binding, introduced in Emacs 24.1, was a mistake, because
1601 `C-c LETTER' bindings are reserved for user customizations.
1603 ** Internationalization
1605 *** New language environment: Persian.
1607 *** New input method `vietnamese-vni'.
1609 ** Nextstep (GNUstep / Mac OS X) port
1611 *** Support for fullscreen and the frame parameter fullscreen.
1613 *** A file dialog is used for open/save operations initiated from the
1617 * Editing Changes in Emacs 24.3
1619 ** Search and Replace
1621 *** Non-regexp Isearch now performs "lax" space matching.
1622 Each sequence of spaces in the supplied search string may match any
1623 sequence of one or more whitespace characters, as specified by the
1624 variable `search-whitespace-regexp'. (This variable is also used by a
1625 similar existing feature for regexp Isearch.)
1627 *** New Isearch command `M-s SPC' toggles lax space matching.
1628 This applies to both ordinary and regexp Isearch.
1630 *** New option `replace-lax-whitespace'.
1631 If non-nil, `query-replace' uses flexible whitespace matching too.
1634 *** Global `M-s _' starts a symbol (identifier) incremental search,
1635 and `M-s _' in Isearch toggles symbol search mode.
1636 `M-s c' in Isearch toggles search case-sensitivity.
1638 ** Navigation commands
1640 *** New binding `M-g c' for `goto-char'.
1642 *** New binding `M-g TAB' for `move-to-column'.
1644 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1645 interactively with no prefix arg. Previously, it moved to column 1.
1647 ** New option `yank-handled-properties' allows processing of text
1648 properties on yanked text, in ways that are more general than just
1649 removing them (as is done by `yank-excluded-properties').
1651 ** New option `delete-trailing-lines' specifies whether
1652 M-x delete-trailing-whitespace should delete trailing lines at the end
1653 of the buffer. It defaults to t.
1655 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1657 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1658 `ucs-insert' is now an obsolete alias for `insert-char'.
1660 ** The `z' key no longer has a binding in most special modes.
1661 It used to be bound to `kill-this-buffer', but `z' is too easy to
1664 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1665 It copies the region-rectangle as the last rectangle kill.
1669 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1671 *** New option `register-separator' specifies the register containing
1672 the text to put between collected texts for use with
1673 M-x append-to-register and M-x prepend-to-register.
1676 * Changes in Specialized Modes and Packages in Emacs 24.3
1678 ** Common Lisp emulation (CL)
1680 *** CL's main entry is now (require 'cl-lib).
1681 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1682 i.e., all its definitions have the "cl-" prefix (and internal definitions
1683 use the "cl--" prefix).
1685 If `cl' provided a feature under the name `foo', then `cl-lib'
1686 provides it under the name `cl-foo' instead; with the exceptions of the
1687 few `cl' definitions that had to use `foo*' to avoid conflicts with
1688 pre-existing Elisp entities. These have been renamed to `cl-foo'
1689 rather than `cl-foo*'.
1691 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1692 provide the old, non-prefixed names. Some exceptions are listed below:
1694 *** `cl-flet' is not like `flet' (which is deprecated).
1695 Instead it obeys the behavior of Common-Lisp's `flet'.
1696 In particular, in cl-flet function definitions are lexically scoped,
1697 whereas in flet the scoping is dynamic.
1699 *** `cl-labels' is slightly different from `labels'.
1700 The difference is that it relies on the `lexical-binding' machinery
1701 (as opposed to the `lexical-let' machinery used previously) to capture
1702 definitions in closures, so such closures will only work if `lexical-binding'
1705 *** `cl-letf' is not exactly like `letf'.
1706 The only difference is in details that relate to some deprecated usage
1707 of `symbol-function' in place forms.
1709 *** `progv' was rewritten to use the `let' machinery.
1710 A side effect is that variables without corresponding values are bound
1711 to nil rather than being made unbound.
1713 *** The following methods of extending `setf' are obsolete
1714 (use features from gv.el instead):
1715 `define-modify-macro' (use `gv-letplace')
1716 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1717 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1718 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1722 *** Changes are now highlighted using the same color scheme as in
1723 modern VCSes. Deletions are displayed in red (new faces
1724 `diff-refine-removed' and `smerge-refined-removed', and new definition
1725 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1726 and `smerge-refined-added', and new definition of `diff-added').
1728 *** The variable `diff-use-changed-face' defines whether to use the
1729 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1730 changes in context diffs.
1732 *** The new command `diff-delete-trailing-whitespace' removes trailing
1733 whitespace introduced by a diff.
1735 ** Ediff now uses the same color scheme as Diff mode.
1739 A new version of python.el, which provides several new features, including:
1740 per-buffer shells, better indentation, Python 3 support, and improved
1741 shell-interaction compatible with iPython (and virtually any other
1744 *** Some user options have been replaced/renamed, including (old -> new):
1745 **** python-indent -> python-indent-offset
1746 **** python-guess-indent -> python-indent-guess-indent-offset
1747 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1748 **** python-use-skeletons -> python-skeleton-autoinsert
1750 *** Some user options have been removed, including:
1752 **** `python-indent-string-contents': Strings are never indented.
1754 **** `python-honour-comment-indentation':
1755 Comments are always considered as indentation markers.
1757 **** `python-continuation-offset': Indentation is automatically
1758 calculated in a pep8 compliant way depending on the context.
1760 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1761 Have no direct mapping as the shell interaction is completely different.
1763 **** `python-python-command', `python-jython-command':
1764 Replaced by `python-shell-interpreter'.
1766 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1767 `python-pdbtrack-minor-mode-string', `python-source-modes':
1770 *** Some commands have been replaced (old -> new):
1771 **** python-insert-class -> python-skeleton-class
1772 **** python-insert-def -> python-skeleton-def
1773 **** python-insert-for -> python-skeleton-for
1774 **** python-insert-if -> python-skeleton-if
1775 **** python-insert-try/except -> python-skeleton-try
1776 **** python-insert-try/finally -> python-skeleton-try
1777 **** python-insert-while -> python-skeleton-while
1778 **** python-find-function -> python-nav-jump-to-defun
1779 **** python-next-statement -> python-nav-forward-sentence
1780 **** python-previous-statement -> python-nav-backward-sentence
1781 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1782 **** python-end-of-defun-function -> python-nav-end-of-defun
1783 **** python-send-buffer -> python-shell-send-buffer
1784 **** python-send-defun -> python-shell-send-defun
1785 **** python-send-region -> python-shell-send-region
1786 **** python-send-region-and-go -> emulate with python-shell-send-region
1787 and python-shell-switch-to-shell
1788 **** python-send-string -> python-shell-send-string
1789 **** python-switch-to-python -> python-shell-switch-to-shell
1790 **** python-describe-symbol -> python-eldoc-at-point
1794 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1796 *** The D-Bus object manager interface is implemented.
1798 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1799 if their value does not fit into Emacs's integer range.
1801 *** The function `dbus-call-method' is now non-blocking.
1802 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1804 *** Signals can also be sent as unicast messages.
1806 *** The argument list of `dbus-register-signal' has been extended,
1807 according to the new match rule types of D-Bus.
1809 *** `dbus-init-bus' supports private connections.
1811 *** There is a new function `dbus-setenv'.
1813 ** `desktop-path' no longer includes the "." directory.
1814 Desktop files are now located in ~/.emacs.d by default.
1818 *** `dired-do-async-shell-command' executes each file sequentially
1819 if the command ends in `;' (when operating on multiple files).
1820 Otherwise, it executes the command on each file in parallel.
1822 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1823 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1826 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1827 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1828 mark/unmark/flag all files in the active region.
1830 *** The minibuffer default for `=' (`dired-diff') has changed.
1831 It is now the backup file for the file at point, if one exists.
1832 In Transient Mark mode the default is the file at the active mark.
1834 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1835 The global binding for `M-=', `count-words-region' is in effect.
1839 *** New module "notifications", which can send a notification when you
1840 receive a private message or your nickname is mentioned.
1842 *** ERC will look up server/channel names via auth-source and use any
1845 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1846 only applies to messages sent by lurkers.
1848 ** reStructuredText mode
1850 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1851 fontification, comment handling, and customization have all been revised
1854 *** Support for `imenu' and `which-function-mode'.
1856 *** The reStructuredText syntax is more closely covered.
1857 Sphinx support has been improved.
1859 *** `rst-insert-list' inserts new list or continues existing lists.
1861 *** A negative prefix argument always works for `rst-adjust'.
1863 *** The window configuration is reset after displaying a TOC.
1865 *** The constant `rst-version' describes the rst.el package version.
1869 *** Support for percent literals and recognition of regular expressions
1870 in method calls without parentheses with more methods, including Cucumber
1873 *** Improved syntax highlighting and indentation.
1875 *** New command `ruby-toggle-block', bound to `C-c {'.
1877 *** Some non-standard keybindings/commands have been removed:
1879 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1881 **** `ruby-mark-defun'; use `mark-defun'.
1883 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1884 appropriate settings for the variables `beginning-of-defun-function'
1885 and `end-of-defun-function'.
1887 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1888 `reindent-then-newline-and-indent' and `newline' have been removed.
1890 ** Shell Script mode
1892 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1894 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1896 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1900 *** The free software compiler GHDL is supported (and now the default).
1902 *** Support for the VHDL-AMS packages has been added/updated.
1904 *** Updated to the 2002 revision of the VHDL standard.
1906 *** Accepts \r and \f as whitespace.
1910 *** The faces used by Apropos are now directly customizable.
1911 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1912 see the `apropos' Custom group for details.
1914 *** The old options whose values specified faces to use have been removed
1915 (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1916 `apropos-match-face' and `apropos-property-face'.).
1920 *** This package has been rewritten to use Tabulated List mode.
1922 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1923 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1927 *** Algebraic simplification mode is now the default.
1928 To restrict to the limited simplifications given by the former
1929 default simplification mode, use `m I'.
1933 *** You can customize the header text that appears above each calendar month.
1934 See the variable `calendar-month-header'.
1936 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1938 *** The calendars produced by cal-html include holidays.
1939 Customize `cal-html-holidays' to change this.
1943 *** The major modes from the parser generators "Bovine" and "Wisent"
1944 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1945 are in `auto-mode-alist', and the corresponding manuals are included.
1949 **** Menu support for the "Configuration" feature. This allows users to
1950 choose the active configuration (such as debug or install) from the menu.
1952 **** New command `ede-set' to interactively set project-local variables.
1954 **** Support for compiling, debugging, and running in "generic" projects.
1956 **** Autoconf editing support for M4 macros with complex arguments.
1958 **** Compilation support for the "linux" project type.
1960 **** "simple" projects have been removed; use "generic" projects instead.
1964 **** Support for parsing #include statements inside a namespace in C/C++.
1966 **** Improved support for 'extern "C"' declarations in C/C++.
1968 **** The ability to ignore more common special C/C++ preprocessor symbols,
1969 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1970 If available, include cdefs.h as an additional source of preprocessor symbols.
1972 **** Improved C/C++ function pointer parsing.
1974 **** In Python, support for converting imports to include file names.
1976 **** Ability to dynamically determine the Python load path.
1978 **** Support for the Python 'WITH' and 'AT' keywords.
1980 **** Improved tooltip completion.
1984 **** The SRecode manual is now included.
1986 **** Tag generation supports constructor/destructor settings and system
1987 include differentiation.
1989 **** Addition of 'Framework' support: Frameworks are specified when a
1990 particular kind of library (such as Android) is needed in a common language
1993 **** Support for nested templates and let variables override based on priority.
1995 **** Support for merging tables from multiple related modes, such as
1996 default -> c++ -> arduino.
1998 ** Compile has a new option `compilation-always-kill'.
2002 *** `custom-reset-button-menu' now defaults to t.
2004 *** Non-option variables are never matched in `customize-apropos' and
2005 `customize-apropos-options' (i.e., the prefix argument does nothing for
2006 these commands now).
2010 *** The variables `term-default-fg-color' and `term-default-bg-color'
2011 are now deprecated in favor of the customizable face `term'.
2013 *** You can customize how to display ANSI terminal colors and styles
2014 by customizing the corresponding `term-color-<COLOR>',
2015 `term-color-underline' and `term-color-bold' faces.
2019 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
2021 *** Remote processes are now also supported on remote MS-Windows hosts.
2025 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2026 Previously, this slot stored semicolon-separated attribute-value pairs
2027 appended to some imap URLs, but this is not compatible with RFC 3986.
2028 So now the `filename' slot stores the entire path and query components,
2029 and the `attributes' slot is always nil.
2031 *** New function `url-encode-url' for encoding a URI string.
2032 The `url-retrieve' function now uses this to encode its URL argument,
2033 in case that is not properly encoded.
2035 ** notifications.el supports now version 1.2 of the Notifications API.
2036 The function `notifications-get-capabilities' returns the supported
2039 ** Flymake uses fringe bitmaps to indicate errors and warnings.
2040 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2041 `flymake-warning-bitmap'.
2043 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2044 specifying URL types that should be converted to remote file names at
2045 the FFAP prompt. The default is now '("ftp").
2047 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
2048 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2050 ** New option `mouse-avoidance-banish-position' specifies where the
2051 `banish' mouse avoidance setting moves the mouse.
2053 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2054 closing brackets to be aligned with the line of the opening bracket.
2056 ** In Proced mode, new command `proced-renice' renices marked processes.
2058 ** New option `async-shell-command-buffer' specifies the buffer to use
2059 for a new asynchronous `shell-command' when the default output buffer
2060 `*Async Shell Command*' is already in use.
2062 ** SQL mode has a new option `sql-db2-escape-newlines'.
2063 If non-nil, newlines sent to the command interpreter will be escaped
2064 by a backslash. The default does not escape the newlines and assumes
2065 that the sql statement will be terminated by a semicolon.
2067 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2068 (and modes that derive from it), sorts the column at point, or the Nth
2069 column if a numeric prefix argument is given.
2071 ** `which-func-modes' now defaults to t, so Which Function mode, when
2072 enabled, applies to all applicable major modes.
2074 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
2077 ** Follow mode no longer works by using advice.
2078 The option `follow-intercept-processes' has been removed.
2080 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2082 ** Hooks renamed to avoid obsolete "-hooks" suffix:
2083 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2084 *** semantic-change-hooks -> semantic-change-functions
2085 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2086 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2087 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2088 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2089 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2090 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2091 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2092 *** rcirc-activity-hooks -> rcirc-activity-functions
2093 *** rcirc-print-hooks -> rcirc-print-functions
2094 *** dbus-event-error-hooks -> dbus-event-error-functions
2095 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2096 *** checkdoc-style-hooks -> checkdoc-style-functions
2097 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2098 *** archive-extract-hooks -> archive-extract-hook
2099 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2100 *** hfy-post-html-hooks -> hfy-post-html-hook
2101 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2102 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2103 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2104 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2106 ** Obsolete packages
2109 In most cases, assoc+member+push+delq work just as well.
2110 And in any case it's just a terrible package: ugly semantics, terrible
2111 inefficiency, and not namespace-clean.
2120 * Incompatible Lisp Changes in Emacs 24.3
2122 ** Docstrings starting with `*' no longer indicate user options.
2123 Only variables defined using `defcustom' are considered user options.
2124 The function `user-variable-p' is now an obsolete alias for
2125 `custom-variable-p'.
2127 ** The return values of `defalias', `defun' and `defmacro' have changed,
2128 and are now undefined. For backwards compatibility, `defun' and
2129 `defmacro' currently return the name of the newly defined
2130 function/macro, but this should not be relied upon.
2132 ** `random' by default now returns a different random sequence in
2133 every Emacs run. Use `(random S)', where S is a string, to set the
2134 random seed to a value based on S, in order to get a repeatable
2135 sequence in later calls.
2137 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2138 that substring is inserted literally even if the LITERAL arg is
2139 non-nil, instead of causing an error to be signaled.
2141 ** `select-window' now always makes the window's buffer current.
2142 It does so even if the window was selected before.
2144 ** The function `x-select-font' can return a font spec, instead of a
2145 font name as a string. Whether it returns a font spec or a font name
2146 depends on the graphical library.
2148 ** `face-spec-set' no longer sets frame-specific attributes when the
2149 third argument is a frame (that usage was obsolete since Emacs 22.2).
2151 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2153 ** The CL package's `get-setf-method' function no longer exists.
2154 Generalized variables are now part of core Emacs Lisp, and implemented
2155 differently to the way cl.el used to do it. It is not possible to
2156 define a compatible replacement for `get-setf-method'. See the file
2157 gv.el for internal details of the new implementation.
2159 ** The arguments of `dbus-register-signal' are no longer just strings,
2160 but keywords or keyword-string pairs. The old argument list will
2161 still be supported for Emacs 24.x.
2163 ** Miscellaneous name changes
2164 Some Lisp symbols have been renamed to correct their spelling,
2165 or to be more consistent with standard Emacs terminology.
2167 *** Renamed functions
2168 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2169 **** inactivate-input-method -> deactivate-input-method
2170 **** quail-inactivate -> quail-deactivate
2171 **** robin-inactivate -> robin-deactivate
2172 **** viper-inactivate-input-method -> viper-deactivate-input-method
2173 **** viper-inactivate-input-method-action ->
2174 viper-deactivate-input-method-action
2175 **** ucs-input-inactivate -> ucs-input-deactivate
2178 The old hooks are still supported for backward compatibility, but they
2179 are deprecated and will be removed eventually.
2180 **** input-method-inactivate-hook -> input-method-deactivate-hook
2181 **** robin-inactivate-hook -> robin-deactivate-hook
2182 **** quail-inactivate-hook -> quail-deactivate-hook
2184 *** Renamed variables
2185 **** follow-deactive-menu -> follow-inactive-menu
2186 **** inactivate-current-input-method-function ->
2187 deactivate-current-input-method-function
2189 ** Some obsolete functions, variables, and faces have been removed:
2190 *** `last-input-char', `last-command-char', `unread-command-char'
2191 *** `facemenu-unlisted-faces'
2192 *** `rmail-decode-mime-charset'
2193 *** `iswitchb-read-buffer'
2194 *** `sc-version', `sc-submit-bug-report'
2195 *** `set-char-table-default'
2196 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2197 *** `compile-internal'
2199 *** `mode-line-inverse-video'
2200 *** `follow-mode-off-hook'
2201 *** `cvs-commit-buffer-require-final-newline'
2202 (use `log-edit-require-final-newline' instead)
2203 *** `cvs-changelog-full-paragraphs'
2204 (use `log-edit-changelog-full-paragraphs' instead)
2205 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2206 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2207 *** `vc-master-templates' (use `vc-handled-backends' instead)
2208 *** `vc-checkout-carefully'
2211 * Lisp Changes in Emacs 24.3
2213 ** CL-style generalized variables are now in core Elisp.
2214 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2215 You can define your own generalized variables using `gv-define-simple-setter',
2216 `gv-define-setter', etc.
2218 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2219 This can significantly speed up execution of non-byte-compiled code,
2220 but can also bump into previously unnoticed cyclic dependencies.
2221 These are generally harmless: they will simply cause the macro calls
2222 to be left for later expansion (as before), but will result in a
2223 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2224 You may wish to restructure your code so this does not happen.
2226 ** New sampling-based Elisp profiler.
2227 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2228 When finished, use M-x profiler-stop. The sampling rate can be based on
2229 CPU time or memory allocations.
2231 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2232 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2234 ** New macros `setq-local' and `defvar-local'.
2236 ** Face underlining can now use a wave.
2238 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2239 of `read-regexp' accepts a string ending with a colon and space, and its
2240 second argument DEFAULTS can be a list of strings accessible via `M-n'
2241 in the minibuffer ahead of other hard-coded useful regexp-related values.
2242 More commands use `read-regexp' now to read their regexp arguments.
2246 *** New function `completion-table-with-quoting' to handle completion
2247 in the presence of quoting, such as file completion in shell buffers.
2249 *** New function `completion-table-subvert' to use an existing completion
2250 table, but with a different prefix.
2254 *** New error type and new function `user-error'.
2255 These do not trigger the debugger.
2257 *** New option `debugger-bury-or-kill', saying what to do with the
2258 debugger buffer when exiting debug.
2260 *** Set `debug-on-message' to enter the debugger when a certain
2261 message is displayed in the echo area. This can be useful when trying
2262 to work out which code is doing something.
2264 *** New var `inhibit-debugger', automatically set to prevent accidental
2265 recursive invocations.
2269 *** New command `fit-frame-to-buffer' adjusts the frame height to
2272 *** The command `fit-window-to-buffer' can adjust the frame height
2273 if the new option `fit-frame-to-buffer' is non-nil.
2275 *** New macro `with-temp-buffer-window', similar to
2276 `with-output-to-temp-buffer'.
2278 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2281 *** New option `switch-to-buffer-preserve-window-point' to restore a
2282 window's point when switching buffers.
2284 *** New display action alist entries `window-height' and `window-width'
2285 specify the size of new windows created by `display-buffer'.
2287 *** New display action alist entry `pop-up-frame-parameters', if
2288 non-nil, specifies frame parameters to give any newly-created frame.
2290 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2291 tells display action functions to avoid changing which frame is
2294 *** New display action alist entry `previous-window', if non-nil,
2295 specifies window to reuse in `display-buffer-in-previous-window'.
2297 *** New display action functions `display-buffer-below-selected',
2298 and `display-buffer-in-previous-window'.
2300 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2301 now accept a third argument to avoid choosing the selected window.
2303 *** Additional values recognized for option `window-combination-limit'.
2305 *** The following variables are obsolete, as they can be replaced by
2306 appropriate entries in the `display-buffer-alist' function introduced
2308 **** `dired-shrink-to-fit'
2309 **** `display-buffer-reuse-frames'
2310 **** `display-buffer-function'
2311 **** `special-display-buffer-names'
2312 **** `special-display-frame-alist'
2313 **** `special-display-function'
2314 **** `special-display-regexps'
2318 *** `current-time-string' no longer requires that its argument's year
2319 must be in the range 1000..9999. It now works with any year supported
2320 by the underlying C implementation.
2322 *** `current-time' now returns extended-format time stamps
2323 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2324 PSEC is typically a multiple of 1000 on current machines. Other
2325 functions that use this format, such as `file-attributes' and
2326 `format-time-string', have been changed accordingly. Old-format time
2327 stamps are still accepted.
2329 *** The format of timers in `timer-list' and `timer-idle-list' is now
2330 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2331 The PSECS slot is new, and uses picosecond resolution. It can be
2332 accessed via the new `timer--psecs' accessor.
2334 *** Last-modified time stamps in undo lists now are of the form
2335 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2339 *** Improved security when handling persistent objects:
2341 **** `eieio-persistent-read' now features optional arguments for specifying
2342 the class to load, as well as a flag stating whether subclasses are allowed;
2343 if provided, other classes will be rejected by the reader. For
2344 compatibility with existing code, if the class is omitted only a
2347 **** New specialized reader for pulling in classes and signaling errors
2348 without evaluation of suspicious code.
2350 **** All slots that contain objects must have a :type. Slots with lists
2351 of objects must use a new type predicate for a list of an object type.
2353 *** Support for `find-function' and similar utilities, through the addition
2354 of filename support to generated symbols.
2356 ** Floating point functions now always return special values like NaN,
2357 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2358 Previously, they returned NaNs on some platforms but signaled errors
2359 on others. The affected functions are acos, asin, tan, exp, expt,
2360 log, log10, sqrt, and mod.
2362 ** New fringe bitmap `exclamation-mark'.
2364 ** Miscellaneous changes to special forms and macros
2366 *** `defun' and `defmacro' are now macros rather than special forms.
2368 *** `kbd' is now a function rather than a macro.
2370 ** Miscellaneous new functions
2372 *** `set-temporary-overlay-map' sets up a temporary keymap that
2373 takes precedence over most other maps for a short while (normally one key).
2375 *** `autoloadp' tests if its argument is an autoloaded object.
2377 *** `autoload-do-load' performs the autoloading operation.
2379 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2381 *** `file-name-base' returns a file name sans directory and extension.
2383 *** `function-get' fetches a function property, following aliases.
2385 *** `posnp' tests if an object is a `posn'.
2387 *** `system-users' returns the user names on the system.
2389 *** `system-groups' returns the group names on the system.
2391 *** `tty-top-frame' returns the topmost frame of a text terminal.
2393 ** The following functions and variables are obsolete:
2394 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2395 *** `buffer-has-markers-at'
2396 *** `macro-declaration-function' (use `macro-declarations-alist')
2397 *** `window-system-version' (provides no useful information)
2398 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2399 *** `query-replace-interactive'
2400 *** `font-list-limit' (has had no effect since Emacs < 23)
2403 * Changes in Emacs 24.3 on Non-Free Operating Systems
2405 ** Cygwin builds can use the native MS Windows user interface.
2406 Pass `--with-w32' to configure. The default remains the X11 interface.
2408 ** Two new functions are available in Cygwin builds:
2409 `cygwin-convert-file-name-from-windows' and
2410 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2411 code to access the Cygwin file-name mapping machinery to convert
2412 between Cygwin and Windows-native file and directory names.
2414 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2415 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2416 `mouse-autoselect-window'.
2418 ** On MS Windows Vista and later Emacs now supports symbolic links.
2420 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2421 support for libxml2, even if its presence is detected.
2423 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2425 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2426 directories to the search path. You must add them yourself if you want them.
2429 * Changes in Emacs 24.2
2431 ** This is mainly a bug-fix release.
2434 * Installation Changes in Emacs 24.1
2436 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2437 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2438 also depend on Gtk+. You can disable them with --without-rsvg and
2441 ** Emacs can be compiled with GnuTLS support.
2442 This happens by default if a suitably recent version of the library is
2443 found at build time. To prevent this, use the configure option
2444 `--without-gnutls'. See below for GnuTLS features.
2446 ** Emacs can be compiled with SELinux support.
2447 This happens by default if a suitably recent version of the library is
2448 found at build time. To prevent this, use the configure option
2449 `--without-selinux'. See below for SELinux features.
2451 ** Emacs can be compiled with ImageMagick support.
2452 This happens by default if a suitably recent version of the library is
2453 found at build time. To prevent this, use the configure option
2454 `--without-imagemagick'. See below for ImageMagick features.
2455 This feature is not available for the Nextstep or MS ports.
2457 ** Emacs can be compiled with libxml2 support.
2458 This happens by default if a suitably recent version of the library is
2459 found at build time. To prevent this, use the configure option
2460 `--without-xml2'. See below for libxml2 features.
2462 ** By default, the installed Info and man pages are compressed.
2463 You can disable this by configuring --without-compress-info.
2465 ** New configure option --with-wide-int.
2466 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2467 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2470 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2471 These provide no new functionality, they just remove the need to edit
2472 lib-src/Makefile by hand in order to use the associated features.
2474 ** New configure option --enable-use-lisp-union-type.
2475 This is only useful for Emacs developers to debug certain types of bugs.
2476 This is not a new feature; only the configure flag is new.
2478 ** The standalone programs digest-doc and sorted-doc are removed.
2479 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2481 ** The standalone program `fakemail' is removed.
2482 If you need it, feedmail.el provides a superset of the functionality.
2485 * Startup Changes in Emacs 24.1
2487 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2488 command line arguments, and the EMACS_UNIBYTE environment variable, no
2489 longer have any effect. (They were declared obsolete in Emacs 23.)
2491 ** New command line option `--no-site-lisp' removes site-lisp directories
2492 from load-path. -Q now implies this. This option does not affect the
2493 EMACSLOADPATH environment variable (and hence has no effect for
2497 * Changes in Emacs 24.1
2501 *** Many packages now use the `completion-at-point' command,
2502 rather than implementing separate completion commands.
2504 *** `completion-at-point' now handles tags and semantic completion.
2506 *** Completion in a non-minibuffer now tries to detect the end of completion
2507 and pops down the *Completions* buffer accordingly.
2509 *** New option `completion-cycle-threshold' allows completion cycling.
2511 *** New option `completion-category-overrides' for overriding the
2512 default completion style in certain circumstances.
2514 *** New completion style `substring'.
2516 *** Completion of buffer names uses `substring' completion by default.
2518 *** The option `widget-complete-field' has been removed.
2522 *** The first time you try sending mail, Emacs asks for a mail method.
2523 This is implemented by a new default for `send-mail-function', which
2524 is `sendmail-query-once'. This offers to use the smtpmail package, or
2525 to use the old defaults relying on external mail facilities
2526 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2527 `mailclient-send-it' on Windows).
2529 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2530 transfers the report to your desktop's preferred mail client, if there
2531 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2534 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2535 and Mail mode changes
2537 ** Emacs server and client changes
2539 *** New option `server-port' specifies the port for TCP Emacs servers.
2541 *** New emacsclient argument -q/--quiet suppresses some status messages.
2543 *** New emacsclient argument --frame-parameters specifies the frame
2544 parameters of any newly-created graphical frame.
2546 *** If emacsclient shuts down due to Emacs signaling an error,
2547 its exit status is 1.
2549 *** New emacsclient argument --parent-id ID.
2550 This opens a client frame in parent X window ID, via XEmbed, similar
2551 to the --parent-id argument to Emacs.
2553 ** Internationalization changes
2555 *** Emacs now supports display and editing of bidirectional text.
2556 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2557 displayed in the correct visual order as expected by users of those
2558 scripts. The display reordering is a "full bidirectionality" class
2559 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2560 with no RTL text should look exactly the same as before.
2562 **** New buffer-local variable `bidi-display-reordering'.
2563 To disable display reordering in a buffer, change this to nil.
2565 **** New buffer-local variable `bidi-paragraph-direction'.
2566 If nil (the default), Emacs determines the base direction of each
2567 paragraph from its text, as specified by the UBA. Setting the value
2568 to `right-to-left' or `left-to-right' forces a base direction on each
2571 Paragraphs with right-to-left base direction are displayed starting at
2572 the right window edge.
2574 *** Enhanced support for characters with no glyphs in available fonts,
2575 or, on text terminals, characters that cannot be encoded by the
2576 terminal coding system. The new option `glyphless-char-display-control'
2577 specifies how to display them: as a hexadecimal code in a box, a thin
2578 1-pixel space, an empty box, etc.
2580 *** New input methods for Farsi and Bulgarian
2581 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2583 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2584 (U+2010 and U+2011).
2586 *** New Hebrew translation of the Emacs Tutorial.
2587 Type `C-u C-h t' to choose it in case your language setup doesn't
2588 automatically select it.
2590 ** An Emacs Lisp package manager is now included.
2591 This is a convenient way to download and install additional packages,
2592 from a package repository at http://elpa.gnu.org.
2594 *** M-x list-packages shows a list of packages, which can be
2595 selected for installation.
2597 *** New command `describe-package', bound to `C-h P'.
2599 *** By default, all installed packages are loaded automatically when
2600 Emacs starts up. To disable this, set `package-enable-at-startup' to
2601 nil. To specify the packages to load, customize `package-load-list'.
2603 ** Custom theme changes
2605 *** New command `M-x customize-themes', which provides a convenient
2606 interface for enabling and disabling Custom themes.
2608 *** New option `custom-theme-load-path' is the load path for themes.
2609 Emacs no longer looks for Custom themes in `load-path'. The default
2610 value of `custom-theme-load-path' says to look for themes in
2611 `custom-theme-directory', followed by a subdirectory of
2612 `data-directory' named "themes/", which contains a small selection of
2613 built-in Custom themes.
2615 *** New option `custom-safe-themes' records known-safe theme files.
2616 If a theme is not in this list, Emacs queries before loading it, and
2617 offers to save the theme to `custom-safe-themes' automatically. By
2618 default, all themes included in Emacs are treated as safe.
2620 ** Improved GTK integration
2622 *** GTK scroll-bars are now placed on the right by default.
2623 The function `set-scroll-bar-mode' can change this.
2625 *** GTK tool bars can have just text, just images or images and text.
2626 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2627 the default is taken from desktop settings.
2629 *** GTK tool bars can be placed on any edge of the frame.
2630 The frame-parameter tool-bar-position controls this. It takes the
2631 values top, left, right or bottom. The Options => Show/Hide menu has
2634 *** The default colors for selected text (the `region' face) are taken
2635 from the GTK theme when Emacs is built with GTK.
2637 *** Emacs uses GTK tooltips by default if built with GTK.
2638 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2640 ** Graphical interface changes
2642 *** On graphical displays, the mode-line no longer ends in dashes.
2643 Also, the first dash (which does not indicate anything) is just
2644 displayed as a space.
2646 *** `menu-bar-select-buffer-function' lets you choose another operation
2647 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2649 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2650 built with Xft. These fonts can be set via X resources, for example:
2651 Emacs.pane.menubar.font: Courier-12
2655 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2656 or if it receives a SIGINT signal in batch mode.
2658 *** `kill-emacs-hook' is now also run in batch mode.
2659 Third-party code which adds to `kill-emacs-hook' should check if they
2660 do the right thing in batch mode.
2662 ** Scrolling changes
2664 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2665 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2666 of buffer at first key-press (instead they move to top/bottom of buffer)
2667 when `scroll-error-top-bottom' is non-nil.
2669 *** New option `scroll-error-top-bottom' (see above).
2671 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2672 scroll a line instead of full screen.
2674 *** New property `scroll-command' should be set on a command's symbol to
2675 define it as a scroll command affected by `scroll-preserve-screen-position'.
2677 *** If you customize `scroll-conservatively' to a value greater than 100,
2678 Emacs will never recenter point in the window when it scrolls due to
2679 cursor motion commands or commands that move point (e.f., `M-g M-g').
2680 Previously, you needed to use `most-positive-fixnum' as the value of
2681 `scroll-conservatively' to achieve the same effect.
2683 *** "Aggressive" scrolling now honors the scroll margins.
2684 If you customize `scroll-up-aggressively' or
2685 `scroll-down-aggressively' and move point off the window, Emacs now
2686 scrolls the window so as to avoid positioning point inside the scroll
2689 ** Basic SELinux support has been added.
2690 This requires Emacs to be linked with libselinux at build time.
2692 *** Emacs preserves the SELinux file context when backing up.
2693 Also, the function `copy-file' has an extra optional argument for
2694 preserving SELinux context, and the return value of `backup-buffer'
2695 now includes the SELinux context.
2697 *** New functions `file-selinux-context' and `set-file-selinux-context'
2698 get and set the SELinux context of a file.
2702 *** `delete-by-moving-to-trash' now only affects commands that specify
2703 trashing. This avoids inadvertently trashing temporary files.
2705 *** Calling `delete-file' or `delete-directory' with a prefix argument
2706 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2708 ** File- and directory-local variable changes
2710 *** You can stop directory local vars from applying to subdirectories.
2711 Add an element (subdirs . nil) to the alist portion of any variables
2712 settings to indicate that the section should not apply to
2715 *** Directory local variables can apply to some file-less buffers.
2716 Affected modes include dired, vc-dir, and log-edit. For example,
2717 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2718 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2719 `hack-dir-local-variables-non-file-buffer' to support this.
2721 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2722 Instead, use "eval: (minor-mode 1)".
2724 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2725 to `inhibit-local-variables-regexps'. As the name suggests, it now
2726 applies to ALL file local variables, not just -*- lines. The
2727 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2732 *** The `quit-window' command now restores the last buffer displayed
2733 in the quitted window.
2735 *** Resizing an Emacs frame now preserves proportional window sizes,
2736 modulo restrictions like window minimum sizes and fixed-size windows.
2738 *** The behavior of `display-buffer' is now customizable in detail.
2740 **** New option `display-buffer-base-action' specifies a list of
2741 user-determined display "actions" (functions and optional arguments
2742 for choosing the displaying window).
2744 This takes precedence over the default display action, which is
2745 specified by `display-buffer-fallback-action'.
2747 **** New option `display-buffer-alist' maps buffer name regexps to
2748 display actions, taking precedence over `display-buffer-base-action'.
2750 *** New option `window-combination-limit'.
2751 The new option `window-combination-limit' allows to return the space
2752 obtained for resizing or creating a window more reliably to the window
2753 from which such space was obtained.
2755 *** New option `window-combination-resize'.
2756 The new option `window-combination-resize' allows to split a window that
2757 otherwise cannot be split because it's too small by stealing space from
2758 other windows in the same combination. Subsequent resizing or deletion
2759 of the window will resize all windows in the same combination as well.
2761 *** New option `frame-auto-hide-function' lets you choose between
2762 iconifying or deleting a frame when burying a buffer in a dedicated
2763 frame, or quitting a window showing a buffer in a frame of its own.
2765 *** New commands `maximize-window' and `minimize-window'.
2766 These maximize and minimize the size of a window within its frame.
2768 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2769 These functions allow to navigate through the live buffers that have
2770 been shown in a specific window.
2772 ** Minibuffer changes
2774 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2775 This is handy for minibuffer-only frames, and is also used for the feature
2776 where mouse-1 pops up *Messages*"', which can now easily be changed.
2778 *** Minibuffers set `truncate-lines' to nil.
2779 If you want to change the value to something else, you could use
2780 for example `minibuffer-setup-hook'.
2782 ** `auto-mode-case-fold' is now enabled by default.
2784 ** `backup-by-copying-when-mismatch' now defaults to t.
2786 ** New basic faces `error', `warning', `success'.
2787 These are used to highlight text indicating failure, caution or
2788 successful operation.
2790 ** New option `list-colors-sort' defines the color sort order
2791 for `list-colors-display'.
2793 ** The variable `focus-follows-mouse' now always defaults to nil.
2796 * Editing Changes in Emacs 24.1
2800 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2801 `isearch-yank-line'.
2803 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2804 `isearch-yank-kill'.
2806 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2808 ** New commands `count-words-region' and `count-words'.
2810 *** M-= is bound to `count-words-region', not `count-lines-region'.
2811 The `count-words-region' command, when called interactively, reports
2812 the number of lines, words, and characters in the region. It is a
2813 superset of the old `count-lines-region', which is now an obsolete
2816 ** The command `just-one-space' (M-SPC), if given a negative argument,
2817 also deletes newlines around point.
2821 *** New option `delete-active-region'.
2822 If non-nil, [delete] and DEL delete the region if it is active and no
2823 prefix argument is given. If set to `kill', those commands kill
2826 *** New command `delete-forward-char', bound to [delete].
2827 This is meant for interactive use, and obeys `delete-active-region'.
2828 The command `delete-char' does not obey `delete-active-region'.
2830 *** `delete-backward-char' is now a Lisp function.
2831 Apart from obeying `delete-active-region', its behavior is unchanged.
2832 However, the byte compiler now warns if it is called from Lisp; Lisp
2833 callers should use delete-char with a negative argument instead.
2835 *** The option `mouse-region-delete-keys' has been deleted.
2837 ** Selection changes.
2839 The default handling of clipboard and primary selections has been
2840 changed to conform with modern X applications. In short, most
2841 commands for killing and yanking text now use the clipboard, while
2842 mouse commands use the primary selection.
2844 In the following, we provide a list of these changes, followed by a
2845 list of steps to get the old behavior back if you prefer that.
2847 *** `select-active-regions' now defaults to t.
2848 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2849 the kill ring. The selected text is put in the primary selection, if
2850 the system possesses a separate primary selection facility (e.g. X).
2852 **** `select-active-regions' also accepts a new value, `only'.
2853 This means to only set the primary selection for temporarily active
2854 regions (usually made by mouse-dragging or shift-selection);
2855 "ordinary" active regions, such as those made with C-SPC followed by
2856 point motion, do not alter the primary selection.
2858 **** `mouse-drag-copy-region' now defaults to nil.
2860 *** mouse-2 is now bound to `mouse-yank-primary'.
2861 This pastes from the primary selection, ignoring the kill-ring.
2862 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2864 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2866 *** `x-select-enable-primary' now defaults to nil.
2867 Thus, commands that kill text or copy it to the kill-ring (such as
2868 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2870 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2871 exactly equivalent to M-w, C-w, and C-y respectively.
2873 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2874 non-nil by default, as Windows does not support the primary selection
2875 between applications.
2877 *** To return to the previous behavior, do the following:
2879 **** Change `select-active-regions' to nil.
2880 **** Change `mouse-drag-copy-region' to t.
2881 **** Change `x-select-enable-primary' to t (on X only).
2882 **** Change `x-select-enable-clipboard' to nil.
2883 **** Bind `mouse-yank-at-click' to mouse-2.
2885 *** Support for X cut buffers has been removed.
2887 *** X clipboard managers are now supported.
2888 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2890 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2891 in the current rectangle. With a prefix argument, this prompts for a
2892 number to count from and for a format string.
2894 ** `redisplay-dont-pause' now defaults to t.
2895 This makes Emacs feel more responsive to editing commands that arrive
2896 at high rate, e.g. if you lean on some key, because stopping redisplay
2897 in the middle (when this variable is nil) forces more expensive
2898 updates later on, and Emacs appears to be unable to keep up.
2900 ** The behavior of <TAB> for active regions in Text mode has changed.
2901 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2902 when the region is active causes Emacs to indent all the lines in the
2903 region, aligning them with the line previous to the first line in the
2904 region (or with the left margin if there is no previous line).
2906 ** When `occur' is called with a prefix argument, matching strings are
2907 collected into the `*Occur*' buffer without line numbers. If there
2908 are parenthesized subexpressions in the specified regexp, `occur'
2909 reads replacement text that may contain \\& and \\N whose convention
2910 follows `replace-match'.
2913 * Changes in Specialized Modes and Packages in Emacs 24.1
2915 ** Archive Mode has basic support for browsing and updating 7z archives.
2919 *** BibTeX mode now supports biblatex.
2920 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2921 `bibtex-entry-field-alist' is now an obsolete alias for
2922 `bibtex-BibTeX-entry-alist'.
2924 *** New command `bibtex-search-entries', bound to C-c C-a.
2926 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2928 *** New variable `bibtex-search-entry-globally'.
2932 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2934 *** The default browser used by the package is now the "xdg-open" program,
2935 on platforms that support it. This calls your desktop's preferred browser.
2939 *** Support for musical notes.
2941 *** Support for logarithmic units.
2943 *** No longer uses the tex prefix for TeX specific unit names when
2944 using TeX or LaTeX mode.
2946 *** New option to highlight selections using faces.
2948 *** `calc-histogram' has the option of using a vector to determine the bins.
2950 *** New "O" option prefix.
2952 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2954 ** Calendar, Diary, and Appt
2956 *** Diary entries can contain non-printing "comments".
2957 See the variable `diary-comment-start'.
2959 *** Appointments can specify their individual warning times.
2960 See the variable `appt-warning-time-regexp'.
2962 *** The function specified by `appt-disp-window-function' may be passed
2963 lists of arguments if multiple appointments are due at similar times.
2964 If you are using a custom function for this, you should update it.
2966 *** New function `diary-hebrew-birthday'.
2968 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2969 may no longer be nil, but must all be strings.
2971 *** The obsolete (since Emacs 22.1) method of enabling the appt
2972 package by adding `appt-make-list' to `diary-hook' has been removed.
2973 Use `appt-activate' instead.
2975 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2976 appt-issue-message (use the function appt-activate)
2977 appt-visible/appt-msg-window (use the variable appt-display-format)
2979 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2980 view-diary-entries, list-diary-entries, show-all-diary-entries
2984 *** New feature to "guess" the style in an existing buffer.
2985 The main entry point is M-x c-guess.
2987 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2989 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2990 Thus C-M-a will, by default, go to the beginning of the immediate function,
2993 *** "Macros with semicolons" can be registered for correct indentation.
2994 Where such a macro ends a line (no semicolon) the next statement is no longer
2995 parsed as a statement continuation.
2997 ** Comint and modes derived from it use the standard completion code.
3001 *** Compilation mode can be used without Font Lock mode.
3002 `compilation-parse-errors-function' is now obsolete.
3004 *** New variable `compilation-filter-start', which is bound while
3005 `compilation-filter-hook' runs. It records the start position of the
3006 text inserted by `compilation-filter'.
3008 *** `compilation-error-screen-columns' and `compilation-first-column'
3009 are obeyed in the editing buffer. So programming language modes can
3010 set them, whereas previously only the value in the *Compilation*
3015 *** Customize buffers now contain a search field.
3016 The search is performed using `customize-apropos'.
3017 To turn off the search field, set `custom-search-field' to nil.
3019 *** Options in customize group buffers start out hidden if not customized.
3020 Use the arrow to the left of the option name to toggle visibility.
3022 *** custom-buffer-sort-alphabetically now defaults to t.
3024 *** The color widget now has a "Choose" button, which allows you to
3025 choose a color via `list-colors-display'.
3029 *** It is now possible to access buses other than the default system
3032 *** The `dbus-register-method' and `dbus-register-property' functions
3033 optionally do not register names.
3035 *** The new function `dbus-register-service' registers a known service
3036 name on a D-Bus without also registering a property or a method.
3040 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3041 if called with a prefix argument, read a file name from the minibuffer
3042 instead of using the current buffer.
3044 *** The "dired local variables" feature of Dired-x is obsolete.
3045 The standard directory local variables feature replaces it.
3049 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3050 controlling attempts to autojoin a channel.
3052 *** New variable `erc-coding-system-precedence': If we use `undecided'
3053 as the server coding system, this variable will then be consulted.
3054 The default is to decode strings that can be decoded as utf-8 as
3055 utf-8, and do the normal `undecided' decoding for the rest.
3059 *** The default value of `eshell-directory-name' has changed
3060 to be an "eshell" directory in `user-emacs-directory'.
3061 The old "~/.eshell/" directory is still used if it exists, though.
3065 *** The M-x gdb command now uses the GDB Machine Interface protocol.
3066 It now supports multithread non-stop debugging and simultaneous
3067 debugging of several threads.
3071 *** RET (`image-toggle-animation') toggles animation, if applicable.
3072 Animation plays once, unless the option `image-animate-loop' is non-nil.
3076 *** New command M-x info-display-manual displays a named Info manual.
3077 If that manual is already visited in some Info buffer, it displays
3078 that buffer. (This is handy if you have many manuals in many *info*
3079 buffers, and don't remember the name of the buffer visiting the manual
3080 you want to consult.) Otherwise, it loads and displays the manual.
3082 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3083 This is for compatibility with the stand-alone Info reader program,
3084 and also because `Info-edit' is a rarely used command that is disabled
3087 ** Mail mode changes (not Message mode)
3089 *** New command M-x mail-add-attachment for adding MIME attachments
3091 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3092 (Its name is misleading, since it has nothing to do with MIME
3093 attachments.) The old name is now an obsolete alias to the new name.
3095 ** MH-E has been updated to MH-E version 8.3.1.
3096 See MH-E-NEWS for details.
3098 ** Modula-2 mode provides auto-indentation.
3100 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3102 ** nXML mode no longer binds C-RET to `nxml-complete'.
3103 Completion is now performed via `completion-at-point', bound to C-M-i
3104 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3105 default), this performs tag completion.
3107 ** Org mode has been updated to version 7.8.09.
3108 See ORG-NEWS for details.
3110 ** Prolog mode has been completely revamped, with lots of additional
3111 functionality such as more intelligent indentation, electricity,
3112 support for more variants, including Mercury, and a lot more.
3116 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3117 in the Rmail incoming message.
3119 *** The variable `rmail-message-filter' no longer has any effect.
3120 This change was made in Emacs 23.1 but was not advertised at the time.
3121 Try using `rmail-show-message-hook' instead.
3125 *** M-x shell prompts for the shell path name if the default directory
3126 is a remote file name and neither the environment variable $ESHELL nor
3127 the variable `explicit-shell-file-name' is set.
3129 *** TAB is now bound to the standard `completion-at-point' command,
3130 which now implements the pcomplete rules for shell command completion.
3134 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3135 if the mail server supports them. This uses either built-in GnuTLS
3136 support, or the starttls.el library. Customize `smtpmail-stream-type'
3139 *** The variable `smtpmail-auth-credentials' has been removed.
3140 By default, the information is now stored in the file ~/.authinfo.
3141 This was the default value of smtpmail-auth-credentials. If you had
3142 customized smtpmail-auth-credentials to a list of user names and
3143 passwords, those settings are not used. During your first connection
3144 to the smtp server, Emacs will prompt for the user name and password,
3145 and offer to save them to ~/.authinfo. Or you can manually copy the
3146 credentials to ~/.authinfo. For example, if you had
3148 (setq smtpmail-auth-credentials
3149 '(("mail.example.org" 25 "jim" "s!cret")))
3151 then the equivalent line in ~/.authinfo would be
3153 machine mail.example.org port 25 login jim password s!cret
3155 See the auth-source manual for more information, e.g. on encrypting
3156 the credentials file.
3158 *** The variable `smtpmail-starttls-credentials' has been removed.
3159 If you had that set, you need to put
3161 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3163 in your ~/.authinfo file instead.
3165 *** SMTPmail defaults to using the address in the From: header as the
3166 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3167 to the address you wish to use instead.
3171 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3172 and `sql-oracle-scan-on'.
3174 *** New options controlling prompting for login parameters.
3175 Each supported product has a custom variable `sql-*-login-params',
3176 which is a list of the parameters to be prompted for before a
3177 connection is established.
3179 *** The command `sql-product-interactive' now takes a prefix argument,
3180 which causes it to prompt for an SQL product.
3182 *** Product-specific SQL interactive commands now take prefix arguments.
3183 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3184 given a prefix argument, prompt for a name for the SQL interactive
3185 buffer. This reduces the need for calling `sql-rename-buffer'.
3187 *** SQL interactive modes suppress command continuation prompts, and
3188 replace tabs with spaces. The first change impacts multiple line SQL
3189 statements entered with C-j between each line, statements yanked into
3190 the buffer and statements sent with `sql-send-*' functions. The
3191 second prevents the MySQL and Postgres interpreters from listing
3192 object name completions when sent text via `sql-send-*' functions.
3194 *** New command `sql-connect' starts a predefined SQLi session,
3195 using the login parameters from `sql-connection-alist'.
3197 *** New "Save Connection" menu item in SQLi buffers.
3198 This gathers the login params specified for the SQLi session, if it
3199 was not started by a connection, and saves them as a new connection.
3201 *** New commands for listing database objects and details:
3202 sql-list-all and sql-list-table.
3204 *** An API for manipulating SQL product definitions has been added.
3208 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3212 *** New inline access method "ksu" (kerberized su).
3214 *** The following access methods are discontinued: "ssh1_old",
3215 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3217 *** The user option `remote-file-name-inhibit-cache' controls whether
3218 remote file attributes are cached for better performance.
3220 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3221 default value to "".
3223 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3224 for remote machines which support SELinux.
3226 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3227 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3228 the degree of parallelism.
3230 ** VC and related modes
3232 *** Support for pulling on distributed version control systems.
3233 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3234 supported (currently with Bzr, Git, and Mercurial), to update the
3235 current branch and working tree. A prefix argument means to prompt
3236 the user for specifics, e.g. a pull location.
3238 *** `vc-update' is now an alias for `vc-pull'.
3240 *** Support for merging on distributed version control systems.
3241 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3242 is supported (currently with Bzr, Git, and Mercurial), to merge
3243 changes from another branch into the current one. It prompts for
3244 specifics, e.g. a merge source.
3246 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3247 shows a diff while querying the user. It defaults to t.
3249 *** Log entries in some Log View buffers can be toggled to display a
3250 longer description by typing RET (log-view-toggle-entry-display).
3251 This is currently supported for Bzr, Git, and Mercurial (to support
3252 another backend, define a `log-view-expanded-log-entry-function').
3253 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3254 use this to display the full log entry for the revision at point.
3256 *** New command `vc-ediff' allows visual comparison of two revisions
3257 of a file similar to `vc-diff', but using ediff backend.
3259 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3260 this was not advertised at the time.
3262 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3263 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3264 this was not advertised at the time.
3270 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3272 *** partial-completion-mode (complete.el) is obsolete.
3273 You can get a comparable behavior with:
3274 (setq completion-styles '(partial-completion initials))
3275 (setq completion-pcm-complete-word-inserts-delimiters t)
3277 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3279 *** pgg is obsolete (use EasyPG instead).
3281 *** sregex.el is obsolete, since rx.el is a strict superset.
3283 *** s-region.el and pc-select.el are obsolete.
3284 They are superseded by shift-select-mode, enabled by default since 23.1.
3286 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3290 *** The Landmark game is now invoked with `landmark', not `lm'.
3291 Its functions and variables have been similarly renamed.
3293 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3294 (This interfered with cua-mode.)
3296 *** f90.el has some support for Fortran 2008 syntax.
3298 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3300 *** New command `nato-region' converts text to NATO phonetic alphabet.
3303 * New Modes and Packages in Emacs 24.1
3305 ** Occur Edit mode applies edits made in *Occur* buffers to the
3306 original buffers. It is bound to "e" in Occur mode.
3308 ** New global minor mode electric-pair-mode.
3309 When enabled, typing an open parenthesis automatically inserts the
3310 matching closing one.
3312 ** New global minor mode electric-indent-mode.
3313 When enabled, typing certain characters triggers reindentation.
3314 Major modes wishing to use this can set electric-indent-chars or
3315 electric-indent-functions.
3317 ** New global minor mode electric-layout-mode.
3318 When enabled, typing certain characters automatically inserts newlines.
3319 Major modes wishing to use this can set electric-layout-rules.
3321 ** tabulated-list.el provides a generic major mode for tabulated data,
3322 from which other modes can be derived.
3324 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3326 ** secrets.el is an implementation of the Secret Service API, an
3327 interface to password managers like GNOME Keyring or KDE Wallet. The
3328 Secret Service API requires D-Bus for communication. The command
3329 `secrets-show-secrets' offers a buffer with a visualization of the
3332 ** notifications.el provides an implementation of the Desktop
3333 Notifications API. It requires D-Bus for communication.
3335 ** soap-client.el supports access to SOAP web services from Emacs.
3336 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3338 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3340 ** New emacs-lock.el package.
3341 The previous version has been moved to obsolete/old-emacs-lock.el.
3342 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3343 against exiting Emacs and killing the buffer can be set separately.
3344 The mechanism for automatically turning off protection for buffers
3345 with dead inferior processes has been generalized.
3348 * Incompatible Lisp Changes in Emacs 24.1
3350 ** Passing a nil argument to a minor mode function call now ENABLES
3351 the minor mode unconditionally. This is so that you can write e.g.
3353 (add-hook 'text-mode-hook 'foo-mode)
3355 to enable foo-mode in Text mode buffers, removing the need for
3356 `turn-on-foo-mode' style functions. This affects all mode commands
3357 defined by `define-minor-mode'. If called interactively, the mode
3358 command still toggles the minor mode.
3360 ** The return value of `backup-buffer' has changed.
3361 It is now a list of three elements, where the second element is a list
3362 describing the original file's SELinux context. If Emacs or the
3363 system lacks SELinux support, the context list is (nil nil nil nil).
3364 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3366 ** `char-direction-table' and the `char-direction' function were deleted.
3367 They were buggy and inferior to the new support of bidirectional
3368 editing introduced in Emacs 24. If you need the bidirectional
3369 properties of a character, use `get-char-code-property' with the last
3370 argument `bidi-class'.
3372 ** `copy-directory' now copies the source directory as a subdirectory
3373 of the target directory, if the latter is an existing directory. The
3374 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3375 the contents directly into a pre-existing target directory.
3377 ** For mouse click input events in the text area, the Y pixel
3378 coordinate in the POSITION list now counts from the top of the text
3379 area, excluding any header line. Previously, it counted from the top
3382 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3383 been further reduced. Now a backquote not followed by a space is
3384 always treated as a "new-style" backquote. Please remove all
3385 "old-style" backquotes from your code. If your code uses backquotes
3386 as documented in the Elisp manual, and compiles without warning, then
3387 you have nothing to do in this regard. Code not following the
3388 appropriate conventions may fail to compile.
3390 The most common cause of trouble seems to be an old-style backquote
3391 followed by a newline. Another cause of trouble is vector notation
3392 for key sequence notation: instead of [(control ,)] and [(control ')],
3393 you should write [(control ?,)] and [(control ?')], which will work in
3396 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3397 was not advertised at the time. The function `custom-initialize-delay'
3398 replaced all known uses.
3400 ** `view-buffer' now treats special mode-class in the same way that
3401 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3402 major mode is special).
3404 ** Menu and tool bar changes
3406 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3407 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3408 With these alist entries omitted, `make-frame' checks the value of the
3409 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3410 a menu-bar or tool-bar, respectively. If the alist entries are added,
3411 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3413 *** The menu bar bindings's caches are not used any more.
3414 Use (where-is-internal <def> nil t) instead.
3416 ** Regions created by mouse dragging are now normal active regions,
3417 similar to those created by shift-selection (see Selection changes
3418 above). In previous Emacs versions, these regions were delineated by
3419 `mouse-drag-overlay'; that variable has been removed.
3421 ** The fourth argument of `filter-buffer-substring' has been removed.
3422 If you want to remove text properties from the final result, simply
3423 pass the result through substring-no-properties.
3425 ** cl.el no longer provides `cl-19'.
3427 ** The following obsolete functions and aliases have been removed
3428 (the appropriate new function is given in parentheses; "not needed"
3429 means you can just remove all calls to the function in question):
3431 *** `comint-kill-output' (`comint-delete-output')
3432 *** `decompose-composite-char' (`char-to-string')
3433 *** `outline-visible' (`outline-invisible-p')
3434 *** `internal-find-face' (`facep')
3435 *** `internal-get-face' (`facep and check-face')
3436 *** `frame-update-faces' (not needed)
3437 *** `frame-update-face-colors' (`frame-set-background-mode')
3438 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3439 *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3440 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3441 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3442 *** `x-make-font-unbold' (`make-face-unbold')
3443 *** `x-make-font-unitalic' (`make-face-unitalic')
3444 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3445 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3446 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3447 *** `char-bytes' (== 1)
3448 *** `isearch-return-char' (`isearch-printing-char')
3449 *** `make-local-hook' (not needed)
3450 *** `set-screen-height' (`set-frame-height')
3451 *** `set-screen-width' (`set-frame-width')
3453 ** The following obsolete variables and varaliases have been removed
3454 (the appropriate new variable is given in parentheses):
3456 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3457 *** `vc-header-alist' (`vc-BACKEND-header')
3458 *** `directory-sep-char' (== ?/)
3459 *** `font-lock-defaults-alist' (`font-lock-defaults')
3460 *** `e' (`float-e').
3462 ** The following obsolete files were removed:
3463 sc.el, x-menu.el, rnews.el, rnewspost.el
3465 ** The format of the finder-inf.el file has changed, since the Finder
3466 mechanism is now based on the package system. The variable
3467 `finder-package-info' is replaced by `package--builtins' and
3468 `finder-keywords-hash'.
3470 ** When generating autoloads, `update-directory-autoloads' no longer
3471 assumes every inspected file is in your `load-path'. It instead
3472 generates relative names according to the current `load-path'.
3475 * Lisp Changes in Emacs 24.1
3477 ** Code can now use lexical scoping by default instead of dynamic scoping.
3478 The `lexical-binding' variable enables lexical scoping for local
3479 variables. It is typically set via a file-local variable in the first
3480 line of the file, in which case it applies to all the code in that
3483 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3484 binding instead of the old dynamic binding mode.
3486 *** Lexically scoped interpreted functions are represented with a new form
3487 of function value which looks like (closure ENV ARGS &rest BODY).
3489 *** New macro `letrec' to define recursive local functions.
3491 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3492 So do `defcustom' and other forms that call `defvar' as a subroutine.
3494 *** New function `special-variable-p' to check whether a variable is
3495 declared as dynamically bound.
3497 *** The form ((lambda ...) ...) is deprecated.
3499 ** An Emacs Lisp testing tool is now included.
3500 Emacs Lisp developers can use this tool to write automated tests for
3501 their code. See the ERT info manual for details.
3503 ** Changes for bidirectional display and editing
3505 *** New function `current-bidi-paragraph-direction'.
3506 This returns the base direction of the paragraph at point.
3508 *** New function `bidi-string-mark-left-to-right'.
3509 Given a string containing characters from right-to-left scripts, this
3510 function returns another string which can be safely inserted into a
3511 buffer, such that any following text will be always displayed to the
3512 right of that string. (This works by appending an invisible Unicode
3513 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3515 This is useful when the buffer has overall left-to-right paragraph
3516 direction and you need to insert a string whose contents are not known
3517 in advance, without disrupting the layout of the line.
3521 *** Window tree functions are accessible in Elisp.
3522 Functions are provided to return the parent, siblings or child windows
3523 of any window including internal windows (windows not associated with a
3524 buffer) in the window tree.
3526 **** New function `window-valid-p' gives non-nil for live and internal
3529 **** Window manipulation can deal with internal windows.
3530 Many window handling functions like `split-window', `delete-window', or
3531 `delete-other-windows' as well as the window resizing functions can now
3532 act on any window including internal ones.
3534 *** window-total-height/-width vs window-body-height/-width.
3535 The function `window-height' has been renamed to `window-total-height'
3536 and `window-width' has been renamed to `window-body-width'. The old
3537 names are provided as aliases. Two new functions `window-total-width'
3538 and `window-body-height' are provided.
3540 *** Window parameters specific to window handling functions.
3541 For each window you can specify a parameter to override the default
3542 behavior of a number of functions like `split-window', `delete-window'
3543 and `delete-other-windows'. The variable `ignore-window-parameters'
3544 allows to ignore processing such parameters.
3546 *** New semantics of third argument of `split-window'.
3547 The third argument of `split-window' has been renamed to SIDE and can be
3548 set to any of the values 'below, 'right, 'above, or 'left to make the
3549 new window appear on the corresponding side of the window that shall be
3550 split. Any other value of SIDE will cause `split-window' to split the
3551 window into two side-by-side windows as before.
3553 *** Window resizing functions.
3554 A new standard function for resizing windows called `window-resize' has
3555 been introduced. This and all other functions for resizing windows no
3556 longer delete any windows when they become too small.
3558 *** Deleting the selected window now selects the most recently selected
3559 live window on that frame instead.
3561 *** `adjust-window-trailing-edge' adjustments.
3562 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3563 is able to resize other windows if a window adjacent to the trailing
3564 edge cannot be shrunk any more. This makes its behavior more similar to
3565 that of Emacs 21 without compromising, however, its inability to delete
3566 windows which was introduced in Emacs 22.
3568 *** Window-local buffer lists.
3569 Windows now have local buffer lists. This means that removing a buffer
3570 from display in a window will preferably show the buffer previously
3571 shown in that window with its previous window-start and window-point
3572 positions. This also means that the same buffer may be automatically
3573 shown twice even if it already appears in another window.
3575 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3576 which if non-nil requires the buffer to be displayed in the currently
3577 selected window, signaling an error otherwise. If nil, another window
3578 can be used, e.g. if the selected one is strongly dedicated.
3580 *** `split-window-vertically' and `split-window-horizontally' renamed
3581 to `split-window-below' and `split-window-right' respectively.
3582 The old names are kept as aliases.
3586 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3587 named ACTION, and takes a display action of the same form as
3588 `display-buffer-base-action' (see Changes, above). A non-nil,
3589 non-list value is treated specially, as the old meaning.
3591 **** New variable `display-buffer-overriding-action'.
3593 **** The procedure of `display-buffer' etc. to choose a window is
3594 determined by combining `display-buffer-overriding-action',
3595 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3596 and `display-buffer-fallback-action'. The second and fourth of these
3597 are user-customizable variables.
3599 See the docstring of `display-buffer' for details.
3601 *** New functions `window-state-get' and `window-state-put'.
3602 These functions allow to save and restore the state of an arbitrary
3603 frame or window as an Elisp object.
3607 *** New variable `completion-extra-properties' used to specify extra
3608 properties of the current completion:
3609 - :annotate-function, same as the old completion-annotate-function.
3610 - :exit-function, function to call after completion took place.
3612 *** Functions on `completion-at-point-functions' can return any of the
3613 properties valid for `completion-extra-properties'.
3615 *** `completion-annotate-function' is obsolete.
3617 *** New `metadata' method for completion tables. The metadata thus returned
3618 can specify various details of the data returned by `all-completions':
3619 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3620 used to select a style in completion-category-overrides.
3621 - `annotation-function' to add annotations in *Completions*.
3622 - `display-sort-function' to specify how to sort entries in *Completions*.
3623 - `cycle-sort-function' to specify how to sort entries when cycling.
3625 *** `minibuffer-local-filename-must-match-map' is not used any more.
3626 Instead, the bindings in `minibuffer-local-filename-completion-map'
3627 are combined with `minibuffer-local-must-match-map'.
3629 *** New variable `completing-read-function' allows overriding the
3630 behavior of `completing-read'.
3632 ** `glyphless-char-display' can now distinguish between graphical and
3633 text terminal display, via a char-table entry that is a cons cell.
3635 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3636 Instead, the offending function is removed.
3640 *** New function `run-hook-wrapped' for running an abnormal hook by
3641 passing the hook functions as arguments to a "wrapping" function.
3642 Like `run-hook-with-args-until-success', it stops at the first
3643 non-nil return value.
3645 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3646 set of "wrapping" filters, similar to around advice.
3647 (A version of this macro was actually added in Emacs 23.2 but was not
3648 advertised at the time.)
3652 *** New macro `condition-case-unless-debug' (this was actually added in
3653 Emacs 23.1 as condition-case-no-debug, but not advertised)
3655 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3657 *** Variable `stack-trace-on-error' removed.
3659 *** The debugger can now "continue" from an error, which means it will
3660 jump to the error handler as if the debugger had not been invoked
3661 instead of jumping all the way to the top-level.
3663 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3664 This can be useful when `inhibit-quit' is set.
3666 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3667 named Emacs server instances.
3669 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3670 to redirect STDOUT to a file.
3672 ** The function `format-time-string' now supports the %N directive,
3673 for higher-resolution time stamps.
3675 ** New input reading functions
3677 *** New function `read-char-choice' reads a restricted set of
3678 characters, discarding any inputs not inside the set.
3680 *** The command `read-color' now requires a match for a color name
3681 or RGB triplet, instead of signaling an error if the user provides
3684 **** `facemenu-read-color' is now an alias for `read-color'.
3686 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3687 The variable is now used to load all kind of supported dynamic libraries,
3688 not just image libraries. The previous name is still available as an
3691 ** Syntax parsing changes
3693 *** New variable `syntax-propertize-function'.
3694 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3695 This allows syntax-table properties to be set independently from font-lock:
3696 just call syntax-propertize to make sure the text is propertized.
3697 Together with this new variable come a new hook
3698 syntax-propertize-extend-region-functions, as well as two helper functions:
3699 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3700 as-is; and syntax-propertize-rules which provides a new way to specify
3703 *** Syntax tables support a new "comment style c" additionally to style b.
3705 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3707 ** frame-local variables cannot be let-bound any more.
3709 ** Major and minor mode changes
3711 *** `set-auto-mode' now respects mode: local variables at the end of files,
3712 as well as those in the -*- line.
3714 *** `prog-mode' is a new major mode from which programming modes
3717 **** `prog-mode-hook' can be used to enable features for programming
3718 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3719 on-the-fly spell checking for comments and strings.
3721 *** New hook `change-major-mode-after-body-hook', run by
3722 `run-mode-hooks' just before any other mode hooks.
3724 *** Enabled globalized minor modes can be disabled in specific major modes.
3725 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3726 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3728 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3730 ** File-handling changes
3732 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3733 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3734 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3735 argument is supplied (see Trash changes, above).
3737 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3739 ** Tool-bars can display separators.
3740 Tool-bar separators are handled like menu separators in menu-bar maps,
3741 i.e. via menu entries of the form `(menu-item "--")'.
3745 *** Animated images support (currently animated gifs only).
3747 **** `image-animated-p' returns non-nil if an image can be animated.
3749 **** `image-animate' animates a supplied image spec.
3751 **** `image-animate-timer' returns the timer object for an image that
3754 *** `image-extension-data' has been renamed to `image-metadata'.
3755 The old name is an obsolete alias to the new one.
3757 *** Image mode can view any image type that ImageMagick supports.
3758 This requires Emacs to be built with ImageMagick support.
3760 **** New function `imagemagick-types', defined if ImageMagick support
3761 is enabled, returns a list of image file extensions that your
3762 ImageMagick installation supports.
3764 **** New function `imagemagick-register-types' enables ImageMagick
3765 image types in Image mode and in `create-image' and other helper
3768 **** New option `imagemagick-types-inhibit' excludes certain
3769 ImageMagick image types from `imagemagick-register-types'.
3771 **** With ImageMagick support, there are extra Image mode commands to
3772 resize and rotate images: `image-transform-fit-to-height',
3773 `image-transform-fit-to-width', `image-transform-set-rotation', and
3774 `image-transform-set-scale'.
3776 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3777 passes it to the mail user agent function. This argument specifies an
3778 action for returning to the caller after finishing with the mail. For
3779 example, this is used by Rmail to optionally delete a mail window.
3781 ** XML and HTML parsing
3782 If Emacs is compiled with libxml2 support, there are two new
3783 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3784 and `libxml-parse-xml-region' (which parses XML). Both return an
3785 Emacs Lisp parse tree.
3787 ** Networking and encryption changes
3789 *** `open-network-stream' can now be used to open an encrypted stream.
3790 It now accepts an optional `:type' parameter for initiating a TLS
3791 connection, directly or via STARTTLS. To do STARTTLS, additional
3792 parameters (`:end-of-command', `:success', `:capabilities-command')
3793 must also be supplied.
3795 *** New library gnutls.el.
3796 The new function `gnutls-available-p' returns non-nil if Emacs is
3797 built with GnuTLS support. The main entry points are
3798 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3799 these functions through `open-network-stream', because that can
3800 upgrade connections through STARTTLS opportunistically or use plain
3801 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3804 *** New primitive `secure-hash' that supports many secure hash algorithms:
3805 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3806 sha1.el has been removed. The `sha1' feature is provided by default.
3810 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3812 ** Progress reporters can now "spin".
3813 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3814 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3815 time you call `progress-reporter-update' on that progress reporter,
3816 with a nil or omitted VALUE argument, the reporter message is
3817 displayed with a "spinning bar".
3819 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3820 being reverted, even if the buffer has a local `revert-buffer-function'.
3822 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3823 If delayed-warnings-list is non-nil, the command loop calls
3824 `delayed-warnings-hook' after `post-command-hook'. At present, this
3825 is only used by Emacs on some platforms to display warnings during
3826 startup, which might otherwise not be noticed. This uses the
3827 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3829 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3831 ** New function `make-composed-keymap' that constructs a new keymap
3832 from multiple input maps. You can use this to make a keymap that
3833 inherits from multiple maps, eg:
3834 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3836 ** New function `string-prefix-p'.
3837 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3839 ** New reader macro ## that stands for the empty symbol.
3840 This means that the empty symbol can now be read back. Also, #: by itself
3841 (when not immediately followed by a possible symbol character) stands for
3842 an empty uninterned symbol.
3844 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3846 ** The following functions and variables are obsolete:
3848 *** `tooltip-use-echo-area' is obsolete.
3849 Rather than setting this to t, disable Tooltip mode instead.
3851 *** buffer-substring-filters is obsolete.
3852 Use `filter-buffer-substring-functions' instead.
3854 *** `byte-compile-disable-print-circle' is obsolete.
3856 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3857 Use `post-command-hook' instead.
3859 *** `font-lock-maximum-size' is obsolete.
3862 * Changes in Emacs 24.1 on Non-Free Operating Systems
3864 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3865 and also when HOME is set to C:\ by default.
3867 ** New configure.bat options
3869 *** --enable-checking builds Emacs with extra runtime checks.
3871 *** --distfiles specifies files to be included in binary distribution.
3873 *** --without-gnutls disables automatic GnuTLS detection.
3875 *** --lib for general library linkage, works with the USER_LIBS build variable.
3877 ** New make target `dist' to create binary distribution for MS Windows.
3879 ** The Lisp function `w32-default-color-map' is now obsolete.
3880 (It is only used internally in the Emacs C code.)
3882 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3883 reappear on mouse-over. (Requires OS X 10.6 or later.)
3885 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3886 other platforms, rather than inserting its contents into the buffer.
3889 ----------------------------------------------------------------------
3890 This file is part of GNU Emacs.
3892 GNU Emacs is free software: you can redistribute it and/or modify
3893 it under the terms of the GNU General Public License as published by
3894 the Free Software Foundation, either version 3 of the License, or
3895 (at your option) any later version.
3897 GNU Emacs is distributed in the hope that it will be useful,
3898 but WITHOUT ANY WARRANTY; without even the implied warranty of
3899 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3900 GNU General Public License for more details.
3902 You should have received a copy of the GNU General Public License
3903 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3908 paragraph-separate: "[
\f]*$"