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 updates to the manuals in doc/ are complete.
19 --- means no change in the manuals is needed.
20 When you add a new item, use the appropriate mark if you know it applies,
21 otherwise leave it unmarked.
24 * Installation Changes in Emacs 24.4
26 ** Emacs can now be compiled with ACL support.
27 This happens by default if a suitable support library is found at
28 build time, like libacl on GNU/Linux. To prevent this, use the
29 configure option `--disable-acl'.
31 ** Emacs can now be compiled with file notification support.
32 This happens by default if a suitable system library is found at
33 build time. To prevent this, use the configure option
34 `--with-file-notification-no'. See below for file-notify features.
35 FIXME? This feature is not available for the Nextstep port. (?)
37 ** The configure option `--without-compress-info' has been generalized,
38 and renamed to `--without-compress-install'. It now prevents compression
39 of _any_ files during installation.
41 ** The configure option `--with-crt-dir' has been removed.
42 It is no longer needed, as the crt*.o files are no longer linked
45 ** Directories passed to configure option `--enable-locallisppath' are
46 no longer created during installation.
48 ** Emacs can be compiled with zlib support.
49 If this library is present (which it normally is on most systems), the
50 function `zlib-decompress-region' becomes available, which can
51 decompress gzip- and zlib-format compressed data.
54 ** Emacs for NS (OSX, GNUStep) can be built with ImageMagick support.
55 pkg-config is required to find ImageMagick libraries.
57 ** For OSX >= 10.5, the Core text based font backend from the Mac port is used.
58 For GNUStep and OSX 10.4 the old backend is used.
59 To use the old backend by default, do on the command line:
60 % defaults write org.gnu.Emacs FontBackend ns
63 * Startup Changes in Emacs 24.4
66 ** When initializing `load-path', an empty element in the EMACSLOADPATH
67 environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
68 "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
69 load-path (the one that would have been used if EMACSLOADPATH was unset).
70 This makes it easier to _extend_ the load-path via EMACSLOADPATH
71 (previously, EMACSLOADPATH had to specify the complete load-path,
72 including the defaults). (In older versions of Emacs, an empty element
73 was replaced by ".", so use an explicit "." now if that is what you want.)
76 ** The -L option, which normally prepends its argument to load-path,
77 will instead append, if the argument begins with `:' (or `;' on MS Windows;
78 i.e., `path-separator').
81 ** If you use either site-load.el or site-init.el to customize the dumped
82 Emacs executable, any changes to `load-path' that these files make
83 will no longer be present after dumping. To affect a permanent change
84 to `load-path', use the `--enable-locallisppath' option of `configure'.
87 ** The user option `initial-buffer-choice' can now specify a function
88 to set up the initial buffer.
91 * Changes in Emacs 24.4
94 ** New option `gnutls-verify-error', if non-nil, means that Emacs
95 should reject SSL/TLS certificates that GnuTLS determines as invalid.
96 (This option defaults to nil at present, but this is expected to change
100 ** Emacs now supports menus on text-mode terminals.
101 If the terminal supports a mouse, clicking on the menu bar, or on
102 sensitive portions of the mode line or header line, will drop down the
103 menu defined at that position. Likewise, clicking C-mouse-2 or
104 C-mouse-2 or C-mouse-3 on the text area will pop up the menus defined
107 If the text terminal does not support a mouse, you can activate the
108 first menu-bar menu by typing F10, which invokes `menu-bar-open'.
110 If you want the previous behavior, whereby F10 invoked `tmm-menubar',
111 customize the option `tty-menu-open-use-tmm' to a non-nil value.
112 (Typing M-` will always invoke `tmm-menubar', even if
113 `tty-menu-open-use-tmm' is nil.)
116 ** The *Messages* buffer is created in `messages-buffer-mode',
117 a new major mode, with read-only status. Any code that might create
118 the *Messages* buffer should call the function `messages-buffer' to do
119 so and set up the mode.
121 ** Emacs now supports ACLs (access control lists).
123 *** Emacs preserves the ACL entries of files when backing up.
125 *** New functions `file-acl' and `set-file-acl' get and set the ACL
126 entries of a file. On GNU/Linux, the POSIX ACL interface is used via
127 libacl. On MS-Windows, the NT Security APIs are used to emulate the
128 POSIX ACL interfaces.
130 ** Multi-monitor support has been added.
132 *** New functions `display-monitor-attributes-list' and
133 `frame-monitor-attributes' can be used to obtain information about
134 each physical monitor on multi-monitor setups.
136 *** The functions `display-pixel-width' and `display-pixel-height' now
137 behave consistently among the platforms: they return the pixel width
138 or height for all physical monitors associated with the given display
139 as just they were on X11. To get information for each physical
140 monitor, use the new functions above. Similar notes also apply to
141 `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
142 `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
145 ** The cursor stops blinking after 10 blinks (by default) on X and NS.
146 You can change the default by customizing `blink-cursor-blinks'.
149 ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
150 This affects View mode, etc.
155 *** The command `apropos-variable' is renamed to `apropos-user-option'.
156 `apropos-user-option' shows all user options while `apropos-variable'
157 shows all variables. When called with a universal prefix argument,
158 the two commands swap their behaviors. When `apropos-do-all' is
159 non-nil, they output the same results.
162 *** The key `?' now describes prefix bindings, like `C-h'.
164 *** The command `quail-help' is deleted. Use `C-h C-\'
165 (`describe-input-method') instead.
169 *** ImageMagick images now support the :max-width and :max-height
172 *** Some data types aren't auto-detected by ImageMagick. Adding
173 :format to `create-image' may help if the content type is in the
174 new variable `image-format-suffixes'.
176 ** Frame and window changes
179 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
180 bound to <f11> and M-<f10>, respectively.
182 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
183 `frame-configuration-to-register'. It offers similar functionality,
184 plus enhancements like the ability to restore deleted frames. The
185 command `frame-configuration-to-register' still exists, but is unbound.
188 *** New hooks `focus-in-hook', `focus-out-hook'.
189 These are normal hooks run when an Emacs frame gains or loses input focus.
192 *** `split-window' is now a non-interactive function, not a command.
193 As a command, it was a special case of `C-x 2' (`split-window-below'),
194 and as such superfluous. After being reimplemented in Lisp, its
195 interactive form was mistakenly retained.
198 *** New option `scroll-bar-adjust-thumb-portion'.
199 Available only on X, this option allows to control over-scrolling
200 using the scroll bar (i.e. dragging the thumb down even when the end
201 of the buffer is visible).
203 ** Lisp evaluation changes
205 *** `eval-defun' on an already defined defcustom calls the :set function,
208 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
209 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
210 a list with no limit on its length and level (by using nil values of
211 `print-length' and `print-level'), and inserts additional formats for
212 integers (octal, hexadecimal, and character).
215 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
218 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
219 because it affects caching of paragraph scanning results as well.
222 ** The option `set-mark-default-inactive' has been deleted.
223 This unfinished feature was introduced by accident in Emacs 23.1;
224 simply disabling Transient Mark mode does the same thing.
226 ** The default value of `comment-use-global-state' is changed to t,
227 and this variable has been marked obsolete.
231 *** `read-regexp-defaults-function' defines a function to read regexps,
232 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp',
233 etc. You can customize this to specify a function that provides a
234 default value from the regexp last history element, or from the symbol
237 *** `load-prefer-newer', affects how the `load' function chooses the
238 file to load. If this is non-nil, then when both .el and .elc
239 versions of a file exist, and the caller did not explicitly specify
240 which one to load, then the newer file is loaded. The default, nil,
241 means to always load the .elc file.
244 * Editing Changes in Emacs 24.4
246 ** Indentation changes
249 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
250 When invoked without a prefix argument, it now activates a transient
251 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
252 the text indentation in the region. Typing any other key resumes
253 normal editing behavior.
255 *** `electric-indent-mode' is enabled by default.
257 *** `tab-stop-list' is now implicitly extended to infinity by repeating
258 the last step. Its default value is changed to nil which means a tab
259 stop every `tab-width' columns.
263 *** New command `cycle-spacing' cycles between spacing conventions:
264 having just one space, no spaces, or reverting to the original
265 spacing. Like `just-one-space', it can handle or ignore newlines and
266 leave different number of spaces.
268 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
269 a 1-letter word, which is an error according to Polish and
270 Czech typography rules. To globally enable this feature, evaluate:
272 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
275 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
277 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
278 Most commands are still unaware of it, but kill/yank do work on the rectangle.
281 ** New option `visual-order-cursor-movement'.
282 If this is non-nil, cursor motion with arrow keys will follow the
283 visual order of characters on the screen: <left> always moves to the
284 left, <right> always moves to the right, disregarding the surrounding
285 bidirectional context.
289 *** All register commands can now show help with preview.
292 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
295 *** New command `C-x r f' (`frameset-to-register').
296 See Changes in Emacs 24.4, above.
298 ** New command `delete-duplicate-lines'.
299 When its arg ADJACENT is non-nil (when called interactively with C-u
300 C-u) it works like the utility `uniq'. Otherwise by default it
301 deletes duplicate lines everywhere in the region without regard to
302 adjacency. When its arg KEEP-BLANKS is non-nil (when called
303 interactively with C-u C-u C-u), duplicate blank lines are preserved.
306 * Changes in Specialized Modes and Packages in Emacs 24.4
308 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
310 ~/.emacs.d/timelog replaces ~/.timelog
311 ~/.emacs.d/vip replaces ~/.vip
312 ~/.emacs.d/viper replaces ~/.viper
313 ~/.emacs.d/ido.last replaces ~/.ido.last
314 ~/.emacs.d/kkcrc replaces ~/.kkcrc
315 ~/.emacs.d/quickurls replaces ~/.quickurls
316 ~/.emacs.d/idlwave replaces ~/.idlwave
317 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
318 ~/.emacs.d/places replaces ~/.emacs-places
319 ~/.emacs.d/shadows replaces ~/.shadows
320 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
321 ~/.emacs.d/strokes replaces ~/.strokes
322 ~/.emacs.d/notes replaces ~/.notes
323 ~/.emacs.d/type-break replaces ~/.type-break
324 Also the following files used by the now obsolete otodo-mode.el:
325 ~/.emacs.d/todo-do replaces ~/.todo-do
326 ~/.emacs.d/todo-done replaces ~/.todo-done
327 ~/.emacs.d/todo-top replaces ~/.todo-top
329 ** Backtrace and debugger
331 *** The Lisp debugger's `e' command now includes the lexical environment
332 when evaluating the code in the context at point. Hence, it now lets
333 you access lexical variables.
336 *** New command `v' (`debugger-toggle-locals') displays local vars.
338 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
339 code run via JIT Lock.
344 *** Battery information via the BSD `apm' utility is now supported.
348 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
350 ** Calendar and Diary
353 *** New faces `calendar-weekday-header', `calendar-weekend-header',
354 and `calendar-month-header'.
357 *** New option `calendar-day-header-array'.
360 *** New variable `diary-from-outlook-function', used by the command
361 `diary-from-outlook'.
364 *** The variable `calendar-font-lock-keywords' is obsolete.
368 *** Calc by default now uses the Gregorian calendar for all dates, and
369 uses January 1, 1 AD as its day number 1. Previously Calc used the
370 Julian calendar for dates before September 14, 1752, and it used
371 December 31, 1 BC as its day number 1; the new scheme is more
372 consistent with Calendar's calendrical system and day numbering.
374 *** The new variable `calc-gregorian-switch' lets you configure the
375 date when Calc switches from the Julian to the Gregorian calendar.
376 Nil, the default value, means to always use the Gregorian calendar.
377 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
380 *** Support for ISO 8601 dates.
386 **** The cpp-root project now supports executing a compile command.
387 It can be set through the new :compile-command slot or the
388 buffer-local variable `compile-command'.
390 **** Better selection of include directories for the 'linux' project.
391 Include directories now support out-of-tree build directories and
392 target architecture auto-detection.
396 **** Improved detection of used namespaces in current scope in C++.
398 **** Parsing of default values for variables and function arguments in C/C++.
399 They are also displayed by the summarize feature in the modeline.
401 **** Improved parsing of function pointers in C/C++.
402 This also includes parsing of function pointers as function arguments.
404 **** Parsing of C/C++ preprocessor macros which open new scope.
405 For example, this enables parsing of macros which open new namespaces.
407 **** Support for 'this' pointer in inline member functions in C++.
411 *** New macro `cl-tagbody'.
414 *** letf is now just an alias for cl-letf.
418 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
419 Hence, you can now enable it independently from `transient-mark-mode',
420 `delete-selection-mode', and `shift-select-mode'.
422 *** `cua-highlight-region-shift-only' is now obsolete.
423 You can disable `transient-mark-mode' to get the same result.
425 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
429 *** Support for completion, ElDoc, and Flycheck has been added.
431 *** The current CFEngine syntax is parsed from "cf-promises -s json".
432 There is a fallback syntax available if you don't have cf-promises or
433 if it doesn't support that option.
435 ** Delete Selection mode can now be used without `transient-mark-mode'.
439 *** `desktop-auto-save-timeout' defines the number of seconds idle time
440 before auto-save of the desktop.
442 *** `desktop-restore-frames', enabled by default, allows saving and
443 restoring the frame/window configuration (frameset). Additional options
444 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
445 and `desktop-restore-forces-onscreen' offer further customization.
449 *** New minor mode `dired-hide-details-mode' hides details.
451 ** Eldoc Mode works properly in the minibuffer.
453 ** Electric Pair mode
454 *** New `electric-pair-preserve-balance' enabled by default.
456 Pairing/skipping only kicks in when that help the balance of
457 parentheses and quotes, i.e. the buffer should end up at least as
460 You can further control this behavior by adjusting the predicates
461 stored in `electric-pair-inhibit-predicate' and
462 `electric-pair-skip-self'.
464 *** New `electric-pair-delete-adjacent-pairs' enabled by default.
466 In `electric-pair-mode', the commands `backward-delete-char' and
467 `backward-delete-char-untabify' are now bound to electric variants
468 that delete the closer when invoked between adjacent pairs.
470 *** New `electric-pair-open-newline-between-pairs' enabled by default.
472 In `electric-pair-mode', inserting a newline between adjacent pairs
473 opens an extra newline after point, which is indented if
474 `electric-indent-mode' is also set.
476 *** New `electric-pair-skip-whitespace' enabled by default.
478 Controls if skipping over closing delimiters should jump over any
479 whitespace slack. Setting it to `chomp' makes it delete this
480 whitespace. See also the variable
481 `electric-pair-skip-whitespace-chars'.
483 *** New variables control the pairing in strings and comments.
485 You can customize `electric-pair-text-pairs' and
486 `electric-pair-text-syntax-table' to tweak pairing behavior inside
487 strings and comments.
491 *** New option `epa-mail-aliases'.
493 You can set this to a list of alias expansions for keys to use
494 in `epa-mail-encrypt'.
496 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
497 that means: when one of the recipients of the message being encrypted
498 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
500 If one element of the variable's value is ("foo@bar.com"),
501 that means: when one of the recipients of the message being encrypted
502 is `foo@bar.com', ignore that name as regards encryption.
503 This is useful to avoid a query when you have no key for that name.
507 *** New option `erc-accidental-paste-threshold-seconds'.
508 If set to a number, this can be used to avoid accidentally paste large
509 amounts of data into the ERC input.
514 *** New macro `skip-unless' allows skipping ERT tests.
515 See the ERT manual for details.
520 *** `eshell' now supports visual subcommands and options
521 Eshell has been able to handle "visual" commands (interactive,
522 non-line oriented commands such as top that require display
523 capabilities not provided by eshell) by running them in an Emacs
524 terminal emulator. See `eshell-visual-commands'.
526 This feature has been extended to subcommands and options that make a
527 usually line-oriented command a visual command. Typical examples are
528 "git log" and "git <command> --help" which display their output in a
529 pager by default. See `eshell-visual-subcommands' and
530 `eshell-visual-options'.
533 *** Added Eshell-Tramp module
534 External su and sudo commands are now the default; the internal,
535 Tramp-using variants can still be used by enabling the eshell-tramp
540 *** New option `f90-smart-end-names'.
542 ** Icomplete is a bit more like Ido.
544 *** key bindings to navigate through and select the completions.
546 *** The icomplete-separator is customizable, and its default has changed.
548 *** Removed icomplete-show-key-bindings.
550 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
551 (setq icomplete-with-completion-tables '(internal-complete-buffer))
552 will revert to the old behavior.
556 *** Ido has a manual now.
558 *** `ido-use-virtual-buffers' takes a new value 'auto.
560 *** `ido-decorations' has been slightly extended to give a bit more control.
565 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
566 visit the next image file and the previous image file in the same
567 directory, respectively.
569 *** New commands to show specific frames of multi-frame images.
570 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
571 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
573 *** New commands to speed up, slow down, or reverse animation.
575 *** The command `image-mode-fit-frame' deletes other windows.
576 When toggling, it restores the frame's previous window configuration.
577 It also has an optional frame argument, which can be used by Lisp
578 callers to fit the image to a frame other than the selected frame.
582 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
583 will cycle through faces in `hi-lock-face-defaults' without prompting.
586 *** New global command `M-s h .' (`highlight-symbol-at-point')
587 highlights the symbol found near point without prompting,
588 using the next face automatically.
592 *** New option `imenu-generic-skip-comments-and-strings'.
596 *** New face `info-index-match' is used to highlight matches in index
597 entries displayed by `Info-index-next', `Info-virtual-index' and
602 *** Better indentation of multiple-variable declarations.
603 If declaration spans several lines, variables on the following lines
604 are lined up to the first one.
606 *** We now recognize and better indent continuations in array
609 *** New option `js-switch-indent-offset`.
611 ** MH-E has been updated to MH-E version 8.5.
612 See MH-E-NEWS for details.
616 *** Font locking for texinfo comments and new keywords
617 *** Completion in Octave file buffers
619 *** Jump to definition
620 *** Documentation lookup/search
621 *** Code cleanup and various bug fixes
623 ** OPascal mode is the new name for Delphi mode.
625 *** All delphi-* variables and functions have been renamed to opascal-*.
626 *** `delphi-newline-always-indents' is not supported any more.
627 Use `electric-indent-mode' instead.
628 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
632 *** The format of `archive-contents' files, generated by package
633 repositories, has changed to allow a new (fifth) element in the data
634 vectors, containing an associative list with extra properties.
636 *** `describe-package' buffer uses the `:url' extra property to
637 display a `Homepage' header, if it's present.
639 *** In the buffer produced by `describe-package', there are now buttons
640 listing the keywords related to that package. You can click on them
641 to see other packages related to any given keyword.
643 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
644 the packages by a keyword.
648 *** `prolog-use-smie' has been removed, along with the non-SMIE
653 *** The new command `remember-notes' creates a buffer which is saved
656 You may think of it as a *scratch* buffer whose content is preserved.
657 In fact, it was designed as a replacement for *scratch* buffer and can
658 be used that way by setting `initial-buffer-choice' to
659 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
660 Without the second change, *scratch* buffer will still be there for
661 notes that do not need to be preserved.
663 *** The Remember package can now store notes in separates files.
664 You can use the new function `remember-store-in-files' within the
665 `remember-handler-functions' option.
667 See `remember-data-directory' and `remember-directory-file-name-format'
668 for new options related to this function.
672 *** Customize `rmail-mbox-format' to influence some minor aspects of
673 how Rmail displays non-MIME messages.
676 *** The `unrmail' command now converts from BABYL to mboxrd format,
677 rather than mboxo. Customize `unrmail-mbox-format' to change this.
681 *** New option `ruby-encoding-magic-comment-style'.
683 *** New option `ruby-custom-encoding-magic-comment-template'.
687 *** Improved syntax highlighting and indentation.
689 *** Add more Ruby file types to `auto-mode-alist'.
691 *** New option `ruby-align-to-stmt-keywords'.
693 *** New `electric-indent-mode' integration.
695 ** Search and Replace
698 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
699 starts a symbol (identifier) incremental search forward with the
700 symbol found near point added to the search string initially.
702 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
703 and adds it to the search string.
705 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
706 between nil and the value of the option `search-invisible' (or `open'
709 *** `query-replace' skips invisible text when `search-invisible' is nil,
710 and opens overlays with hidden text when `search-invisible' is `open'.
713 *** A negative prefix arg of replacement commands replaces backward.
714 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
715 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
718 *** By default, prefix arguments do not now terminate Isearch mode.
719 Set `isearch-allow-prefix' to nil to restore old behavior.
721 *** More Isearch commands accept prefix arguments, namely
722 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
725 *** Word search now matches whitespace at the beginning/end
726 of the search string if it contains leading/trailing whitespace.
727 In an incremental word search or when using a non-nil LAX argument
728 of `word-search-regexp', the lax matching can also match part of
729 the first word (in addition to the lax matching of the last word).
730 The same rules are now applied to the symbol search with the difference
731 that it matches symbols, and non-symbol characters between symbols.
736 *** New command `ses-rename-cell' allows assigning names to SES cells.
740 *** `explicit-bash-args' now always defaults to use --noediting.
741 During initialization, Emacs no longer expends a process to decide
742 whether it is safe to use Bash's --noediting option. These days
743 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
747 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
748 You can pick the name of the function and the variables with `C-x 4 a'.
750 *** The SMIE indentation engine is now used by default.
752 ** SMIE indentation can be customized via `smie-config'.
753 The customization can be guessed by Emacs by providing a sample indented
754 file and letting SMIE learn from it.
758 *** New option `term-suppress-hard-newline'.
760 ** Todo mode has been rewritten and enhanced.
761 New features include:
762 - support for multiple todo files and archive files of done items;
763 - renaming, reordering, moving, merging, and deleting categories;
764 - sortable tabular summaries of categories and the types of items they contain;
765 - cross-category lists of items filtered by specific criteria;
766 - more fine-grained interaction with the Emacs diary, by being able to decide
767 for each todo item whether it appears in the Fancy Diary display;
768 - highly flexible new item insertion and item editing;
769 - moving items between categories, storing done items in their category or in
770 archive files, undoing or unarchiving done items;
771 - reprioritizing items by inputting a numerical priority;
772 - extensive customizability of operation and display, including numerous faces.
773 The Todo mode user manual describes all commands and most user options.
774 To support some of these features, a new file format is used, which is
775 incompatible with the old format; however, you can convert old todo and done
776 item files to the new format on initializing the first new todo file, or at any
777 later time with the provided conversion command. The old version of
778 todo-mode.el has been made obsolete and renamed otodo-mode.el.
780 ** trace-function was largely rewritten.
781 New features include:
782 - no prompting for the destination buffer, unless a prefix-arg was used.
783 - additionally to prompting for a destination buffer, when a prefix-arg is
784 used, the user can enter a "context", i.e. Lisp expression whose value at the
785 time the function is entered/exited will be printed along with the function
786 name and arguments. Useful to trace the value of (current-buffer) or
787 (point) when the function is invoked.
791 *** The experimental url syntax for remote file names is withdrawn.
794 *** New connection method "adb", which allows to access Android
795 devices by the Android Debug Bridge. The variable `tramp-adb-program'
796 can be used to adapt the path of the "adb" program, if needed.
798 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
799 "scpc" and "rsyncc" are discontinued. The ssh option
800 "ControlMaster=auto" is set automatically in all ssh-based methods,
804 *** Handlers for `file-acl' and `set-file-acl' for remote machines
805 which support POSIX ACLs.
808 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
809 for remote machines which support filesystem notifications.
811 ** New command `url-cookie-list' displays all the current cookies, and
812 allows deleting selected cookies.
814 ** VC and related modes
817 *** In VC directory mode, `D' displays diffs between VC-controlled
818 whole tree revisions.
821 *** In VC directory mode, `L' lists the change log for the current VC
822 controlled tree in a window.
825 *** In VC directory mode, `I' shows a log of changes that will be
826 received with a pull operation.
829 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
830 under current version control system. When called with a prefix
831 argument, you can remove a file from the ignored file list.
834 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
835 because it is moved to vc-cvs.el.
839 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
841 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
845 *** The commands `woman-default-faces' and `woman-monochrome-faces'
846 are obsolete. Customize the `woman-*' faces instead.
848 ** Obsolete packages:
850 *** Iswitchb is made obsolete by icomplete-mode.
852 *** longlines.el is obsolete; use visual-line-mode instead.
857 *** terminal.el is obsolete; use term.el instead.
859 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
861 *** xesam.el is obsolete, because the XESAM project has been canceled.
864 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
867 *** The Info-edit command is obsolete. Editing Info nodes by hand
868 has not been relevant for some time.
871 * New Modes and Packages in Emacs 24.4
873 ** New package `eww' is a built-in web browser.
874 It is only available if Emacs is compiled with libxml2 support.
876 ** New minor mode `superword-mode', defined in subword.el
877 `superword-mode' overrides the default word motion commands to treat
878 symbol_words as a single word, similar to what `subword-mode' does and
879 using the same internal functions.
881 ** New package nadvice.el offers lighter-weight advice facilities.
883 - add-function/remove-function which can be used to add/remove code on any
884 function-carrying place, such as process-filters or `<foo>-function' hooks.
885 - advice-add/advice-remove to add/remove a piece of advice on a named function,
886 much like `defadvice' does.
888 ** New package frameset.el.
889 It provides a set of operations to save a frameset (the state of all
890 or a subset of the existing frames and windows, somewhat similar to a
891 frame configuration), both in-session and persistently, and restore it
892 at some point in the future.
895 ** New package filenotify.el provides an interface for file system
896 notifications. It requires that Emacs be compiled with one of the
897 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
900 * Incompatible Lisp Changes in Emacs 24.4
903 ** `kill-region' lost its `yank-handler' optional argument.
906 ** `(input-pending-p)' no longer runs other timers which are ready to
907 run. The new optional CHECK-TIMERS param allows for the prior behavior.
910 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
913 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
914 Some languages match those as »...« and others as «...» so better stay neutral.
917 ** In compiled Lisp files, the header no longer includes a timestamp.
920 ** The default file coding for Emacs Lisp files is now utf-8.
921 (See `file-coding-system-alist'.) In most cases, this change is
922 transparent, but files that contain unusual characters without
923 specifying an explicit coding system may fail to load with obscure
924 errors. You should either convert them to utf-8 or add an explicit
928 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
929 It used to disable the minor mode, major mode, and text-property keymaps,
930 whereas now it simply has higher precedence.
932 ** Default process filters and sentinels are not nil any more.
933 Instead they default to a function which does what the nil value used to do.
936 ** `read-event' does not return decoded chars in ttys any more.
937 As was the case in Emacs 22 and before, the decoding of terminal
938 input, according to `keyboard-coding-system', is not performed in
939 `read-event' any more. But unlike in Emacs 22, this decoding is still
940 done before input-decode-map, function-key-map, etc.
943 ** Removed `inhibit-local-menu-bar-menus'.
946 ** Frame-local variables that affect redisplay do not work any more.
947 More specifically, the redisplay does not bother to check for a frame-local
948 value when looking up variables.
951 ** nil and "unbound" are indistinguishable in `symbol-function'.
952 `symbol-function' does not signal a `void-function' error any more.
953 To determine if a symbol's function definition is void, use `fboundp'.
956 ** `defadvice' does not honor the `freeze' flag and cannot advise
957 special-forms any more.
960 ** `dolist' no longer binds VAR while evaluating the RESULT form,
961 when lexical binding is enabled. Previously, VAR was bound to nil,
962 which often led to spurious unused-variable warnings.
965 ** The return value of `backup-buffer' has changed.
966 The second argument is no longer an SELinux context, instead it is an
967 alist of extended attributes as returned by the new function
968 `file-extended-attributes'. The attributes can be applied to another
969 file using `set-file-extended-attributes'.
971 ** By default `copy-file' no longer copies file permission bits to an
972 existing destination; and it sets the file permission bits of a newly
973 created destination to those of the source, masked by the default file
974 permissions. To copy the file permission bits, pass t as the
975 PRESERVE-PERMISSIONS argument of `copy-file'.
978 ** `visited-file-modtime' now returns -1 for nonexistent files.
979 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
980 in the presence of files with negative time stamps.
983 ** The cars of the elements in `interpreter-mode-alist' are now
984 treated as regexps rather than literal strings.
987 * Lisp Changes in Emacs 24.4
990 ** The second argument of `eval' can now specify a lexical environment.
993 ** New functions `special-form-p' and `macrop'.
995 ** New macro `define-alternatives' can be used to define generic commands.
996 Generic commands are interactive functions whose implementation can be
997 selected among several alternatives, as a matter of user preference.
999 ** The `defalias-fset-function' property lets you catch `defalias'
1000 calls, and redirect them to your own function, instead of `fset'.
1003 ** New variable `enable-dir-local-variables'.
1004 Directory-local variables are ignored if this is nil. This may be
1005 useful for modes that want to ignore directory-locals while still
1006 respecting file-local variables.
1009 ** New function `get-pos-property'.
1011 ** Completion changes
1013 *** The separator for `completing-read-multiple' can now be a regexp.
1014 The default separator has been changed to allow surrounding spaces
1017 *** The `common-substring' arg of `display-completion-list' is obsolete.
1018 Either use `completion-all-completions', which returns highlighted
1019 strings (including for partial or substring completion), or call
1020 `completion-hilit-commonality' to add the highlight.
1022 ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1023 let you enable symbol prettification (replacing a string like "lambda" with
1024 the Greek lambda character).
1029 *** Functions to pop up menus and dialogs now work on all terminals,
1030 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1031 `message-box', `yes-or-no-p', etc.
1033 The function `display-popup-menus-p' will now return non-nil for a
1034 display or frame whenever a mouse is supported on that display or
1037 *** New hook `tty-setup-hook'.
1041 *** New display action function `display-buffer-no-window' to not
1042 display the buffer in a window.
1044 *** New display action alist entry `allow-no-window' to indicate the
1045 caller of `display-buffer' is ready to handle the case of not
1046 displaying the buffer in a window.
1048 ** New hook `pre-redisplay-function'.
1051 ** New bool-vector set operation functions:
1052 *** `bool-vector-exclusive-or'
1053 *** `bool-vector-union'
1054 *** `bool-vector-intersection'
1055 *** `bool-vector-set-difference'
1056 *** `bool-vector-not'
1057 *** `bool-vector-subsetp'
1058 *** `bool-vector-count-consecutive'
1059 *** `bool-vector-count-population'
1062 ** Comparison functions =, <, >, <=, >= now take many arguments.
1064 ** Error-handling changes
1067 *** New function `define-error'.
1069 *** `with-demoted-errors' takes an additional argument `format'.
1072 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
1074 ** New library subr-x.el for misc helper functions
1076 *** `hash-table-keys'
1078 *** `hash-table-values'
1080 *** `string-blank-p`
1081 *** `string-empty-p`
1083 *** `string-reverse`
1084 *** `string-trim-left'
1085 *** `string-trim-right'
1087 *** `string-remove-prefix'
1088 *** `string-remove-suffix'
1091 ** Obsoleted functions:
1094 *** `lisp-complete-symbol'
1095 *** `field-complete'
1096 *** `minibuffer-completion-contents'
1097 *** `isearch-nonincremental-exit-minibuffer'
1098 *** `isearch-filter-visible'
1099 *** `generic-make-keywords-list'
1100 *** `get-upcase-table' (use `case-table-get-table' instead).
1102 ** `with-wrapper-hook' is obsoleted by `add-function'.
1103 The few hooks that used with-wrapper-hook are replaced as follows:
1104 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1105 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1106 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1109 ** `byte-compile-interactive-only-functions' is now obsolete.
1110 To specify that a command should only be called interactively, give it
1111 a non-nil `interactive-only' property.
1114 ** `split-string' now takes an optional argument TRIM.
1115 The value, if non-nil, is a regexp that specifies what to trim from
1116 the start and end of each substring.
1118 ** New function `string-suffix-p'.
1120 ** File-handling changes
1123 *** Support for filesystem notifications.
1124 Emacs now supports notifications of filesystem changes, such as
1125 creation, modification, and deletion of files. This requires the
1126 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1127 MS-Windows systems, this is supported for Windows XP and newer
1131 *** The 9th element returned by `file-attributes' is now unspecified.
1132 Formerly, it was t if the file's gid would change if file were deleted
1133 and recreated. This value has been inaccurate for years on many
1134 platforms, and nobody seems to have noticed or cared.
1137 *** The 6th argument to `copy-file' has been renamed to
1138 PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1139 Unix file permission bits as well as SELinux context.
1142 *** The function `file-ownership-preserved-p' now has an optional
1143 argument GROUP which causes it check for file group too. This can be
1144 used in place of the 9th element of `file-attributes'.
1146 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1147 argument, with the same interpretation as the returned value of
1148 `visited-file-modtime'.
1150 ** Changes in autorevert.el
1153 *** If Emacs is compiled with file notification support, notifications
1154 are used instead of checking the time stamp of the files. You can
1155 disable this by setting the user option `auto-revert-use-notify' to
1156 nil. Alternatively, a regular expression of directories to be
1157 excluded from file notifications can be specified by
1158 `auto-revert-notify-exclude-dir-regexp'.
1161 *** The new user option `auto-revert-remote-files' enables reversion
1162 of remote files when set to non-nil.
1166 *** The function `face-spec-set' is now like `setq' for face specs.
1167 Its third arg now accepts values specifying a face spec type (defface,
1168 custom, or override spec), and the relevant spec is set accordingly.
1171 *** New function `add-face-text-property', which can be used to
1172 conveniently prepend/append new face properties.
1174 *** Face specs set via Custom themes now replace the `defface' spec
1175 rather than inheriting from it (as do face specs set via Customize).
1177 *** New face characteristic (supports :underline (:style wave))
1178 specifies whether or not the terminal can display a wavy line.
1181 *** New face spec attribute :distant-foreground
1182 specifies foreground to use if background color is near the foreground
1183 color that would otherwise have been used.
1188 *** `image-animated-p' is now `image-multi-frame-p'.
1189 It returns non-nil for any image that contains multiple frames,
1190 whether or not it specifies a frame delay.
1193 *** New variable `image-default-frame-delay' gives the frame delay for
1194 animated images which do not specify a frame delay.
1197 *** New functions `image-current-frame' and `image-show-frame' for getting
1198 and setting the current frame of a multi-frame image.
1202 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1203 **** object-name -> eieio-object-name
1204 **** object-class -> eieio-object-class
1205 **** object-class-fast -> eieio--object-class
1206 **** object-name-string -> eieio-object-name-string
1207 **** object-num-slots -> eieio--object-num-slots
1208 **** object-set-name-string -> eieio-object-set-name-string
1209 **** class-parent -> eieio-class-parent
1210 **** class-parents -> eieio-class-parents
1211 **** class-children -> eieio-class-children
1212 **** class-num-slots -> eieio--class-num-slots
1213 **** class-precedence-list -> eieio-class-precedence-list
1214 **** All generated class-* and object-* field accessors are now
1215 prefixed with `eieio-' as well.
1217 *** Obsoleted functions:
1219 **** class-direct-subclasses
1220 **** class-direct-superclasses
1222 ** Changes in encoding and decoding of text
1225 *** New coding-system `prefer-utf-8'.
1226 This is like `undecided' but prefers UTF-8 on decoding if the text to
1227 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1228 any non-ASCII characters are automatically encoded as UTF-8.
1231 *** New attributes of coding-systems whose type is `undecided'.
1232 Two new attributes, `:inhibit-null-byte-detection' and
1233 `:inhibit-iso-escape-detection', determine how to detect encoding of
1234 text that includes null bytes and ISO-2022 escape sequences,
1235 respectively. Each of these attributes can be either nil, zero, or
1236 t. If it is t, decoding text ignores null bytes and, respectively,
1237 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1238 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1239 text is encoded in one of the ISO-2022 encodings, such as
1240 iso-2022-7bit. If the value is zero, Emacs consults the variables
1241 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1243 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1244 UTF-8 encoding and decoding, whenever possible.
1246 These attributes are only meaningful for coding-systems of type
1247 `undecided'. (The type of a coding-system is determined by its
1248 `:coding-type' attribute and can be accessed by calling the
1249 `coding-system-type' function.)
1251 ** `time-to-seconds' is not obsolete any more.
1253 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1254 When you edit DIR/FILE, Emacs normally creates a symbolic link
1255 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1256 is being edited. Formerly, if there was already a non-symlink file
1257 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1258 through DIR/.#FILE.9. These fallbacks have been removed, so that
1259 Emacs now no longer locks DIR/FILE in that case.
1261 On file systems that do not support symbolic links, the lock is now a
1262 regular file with contents being what would have been in the symlink.
1265 ** New functions `group-gid' and `group-real-gid'.
1267 ** The spelling of the rx.el category `chinese-two-byte' has been
1268 corrected (the first 'e' was missing).
1270 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1273 *** The package descriptor and name of global variables, constants,
1274 and functions should be separated by two hyphens if the symbol is not
1275 meant to be used by other packages.
1278 * Changes in Emacs 24.4 on Non-Free Operating Systems
1280 ** The procedure for building Emacs on MS-Windows has changed.
1281 It is now built by running the same configure script as on all other
1282 platforms. This requires the MSYS environment and MinGW development
1283 tools. See the updated instructions in nt/INSTALL for details.
1285 Using the Posix configure script and Makefile's also means a change in
1286 the directory structure of the Emacs installation on Windows. It is
1287 now the same as on GNU and Unix systems. In particular, the auxiliary
1288 programs, such as cmdproxy.exe and hexl.exe, are in
1289 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1290 version), version-independent site-lisp is in share/emacs/site-lisp,
1291 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1292 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1293 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1294 directories and will find the files in there automatically; there's no
1295 need to set any variables due to this change.)
1298 ** Emacs on Windows 2000 and later can now access files and directories
1299 whose names cannot be encoded in the current system codepage.
1301 The new variable `w32-unicode-filenames' controls this feature: if it
1302 is t, Emacs uses Unicode APIs to pass file names to system calls,
1303 which lifts the limitation of file names to the current locale.
1306 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1307 The backtrace is written to the 'emacs_backtrace.txt' file in the
1308 directory where Emacs was running.
1311 ** The variable `buffer-file-type' is no longer supported.
1312 Setting it has no effect, and %t in the mode-line format is ignored.
1313 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1314 modifying it has no effect.
1317 ** Lock files now work on MS-Windows.
1318 This allows to avoid losing your edits if the same file is being
1319 edited in another Emacs session or by another user. See the node
1320 "Interlocking" in the Emacs User Manual for the details. To disable
1321 file locking, customize `create-lockfiles' to nil.
1323 ** Improved fullscreen support on Mac OS X.
1324 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1325 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1326 native is the default.
1328 ** OSX >= 10.7 can use sRGB colorspace.
1329 Customize `ns-use-srgb-colorspace' to change style. t is the default.
1330 Note: This does not apply to images.
1333 * Installation Changes in Emacs 24.3
1335 ** The default X toolkit is now Gtk+ version 3.
1336 If you don't pass `--with-x-toolkit' to configure, or if you use
1337 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1338 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1339 You can explicitly require a specific version by passing
1340 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1342 ** New configure option `--enable-link-time-optimization', to utilize
1343 an appropriate feature provided by GCC since version 4.5.0.
1345 ** New configure option `--without-all' to disable most of the optional
1346 features (image support, etc.) that are normally enabled by default.
1348 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1349 Emacs). If building with GCC, this enables compile-time checks that
1350 warn/give errors about possibly-questionable C code. On a recent GNU
1351 system there should be no warnings; on older and on non-GNU systems
1352 the results may be useful to developers.
1354 ** The configure option `--enable-use-lisp-union-type' has been
1355 renamed to `--enable-check-lisp-object-type', as the resulting
1356 Lisp_Object type no longer uses a union to implement the compile time
1357 check that this option enables.
1359 ** The configure option `--disable-maintainer-mode' has been removed,
1360 as it was confusingly-named and rarely useful.
1362 ** The configure options `--program-prefix', `--program-suffix', and
1363 `--program-transform-name' apply to more than just the installed
1364 binaries. Now they also affect the man pages, icons, and the
1365 etc/emacs.desktop file; but not the info pages, since this would break
1366 links between the various manuals.
1368 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1369 overwriting "emacs" in the installation bin/ directory with a link
1372 ** Emacs uses libtinfo in preference to libncurses, if available.
1374 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1375 /usr/pkg/lib to the linker search path. You must add them yourself if
1378 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1379 (from the bin and libexec directories, respectively). The former is
1380 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1383 * Startup Changes in Emacs 24.3
1385 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1386 lisp/ directory. There should not be any there anyway. If you have
1387 been adding them there, put them somewhere else; e.g., site-lisp.
1389 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1392 * Changes in Emacs 24.3
1396 *** `C-h f' (`describe-function') can now perform autoloading.
1397 When this command is called for an autoloaded function whose docstring
1398 contains a key substitution construct, that function's library is
1399 automatically loaded, so that the documentation can be shown
1400 correctly. To disable this, set `help-enable-auto-load' to nil.
1402 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1403 even after their associated libraries have been loaded (and the
1404 autoloads have been redefined as functions).
1408 *** Images displayed via ImageMagick now support transparency and the
1409 :background image specification property.
1411 *** When available, ImageMagick support is automatically enabled.
1412 It is no longer necessary to call `imagemagick-register-types'
1413 explicitly to install ImageMagick image types; that function is called
1414 automatically at startup, or when customizing an imagemagick- option.
1416 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1417 ImageMagick to view images. (You must call `imagemagick-register-types'
1418 afterwards if you do not use customize to change this.)
1420 *** The new variable `imagemagick-enabled-types' also affects which
1421 ImageMagick types are treated as images. The function
1422 `imagemagick-filter-types' returns the list of types that will be
1427 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1428 next and previous path separator, respectively.
1430 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1431 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1432 non-nil before enabling the mode.
1436 *** New option `mode-line-default-help-echo' specifies the help text
1437 (shown in a tooltip or in the echo area) for any part of the mode line
1438 that does not have its own specialized help text.
1440 *** You can now click mouse-3 in the coding system indicator to invoke
1441 `set-buffer-file-coding-system'.
1443 ** Server and client
1445 *** emacsclient now obeys string values for `initial-buffer-choice',
1446 if it is told to open a new frame without specifying any file to visit
1447 or expression to evaluate.
1449 *** New option `server-auth-key' specifies a shared server key.
1451 ** Emacs now generates backtraces on fatal errors.
1452 On encountering a fatal error, Emacs now outputs a textual description
1453 of the fatal signal, and a short backtrace on platforms like glibc
1454 that support backtraces.
1456 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1457 This minor mode replaces `toggle-read-only', which is now obsolete.
1459 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1460 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1461 respectively, without exiting from the prompt.
1463 ** In the Package Menu, newly-available packages are listed as "new",
1464 and sorted above the other "available" packages by default.
1466 ** If your Emacs was built from a bzr checkout, the new variable
1467 `emacs-bzr-version' contains information about the bzr revision used.
1469 ** New option `create-lockfiles' specifies usage of lockfiles.
1470 It defaults to t. Changing it to nil inhibits the creation of lock
1471 files (use this with caution).
1473 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1474 variables on remote hosts.
1476 ** The entry for PCL-CVS has been removed from the Tools menu.
1477 The PCL-CVS commands are still available via the keyboard.
1479 ** Using "unibyte: t" in Lisp source files is obsolete.
1480 Use "coding: raw-text" instead.
1482 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1483 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1484 The previous binding, introduced in Emacs 24.1, was a mistake, because
1485 `C-c LETTER' bindings are reserved for user customizations.
1487 ** Internationalization
1489 *** New language environment: Persian.
1491 *** New input method `vietnamese-vni'.
1493 ** Nextstep (GNUstep / Mac OS X) port
1495 *** Support for fullscreen and the frame parameter fullscreen.
1497 *** A file dialog is used for open/save operations initiated from the
1501 * Editing Changes in Emacs 24.3
1503 ** Search and Replace
1505 *** Non-regexp Isearch now performs "lax" space matching.
1506 Each sequence of spaces in the supplied search string may match any
1507 sequence of one or more whitespace characters, as specified by the
1508 variable `search-whitespace-regexp'. (This variable is also used by a
1509 similar existing feature for regexp Isearch.)
1511 *** New Isearch command `M-s SPC' toggles lax space matching.
1512 This applies to both ordinary and regexp Isearch.
1514 *** New option `replace-lax-whitespace'.
1515 If non-nil, `query-replace' uses flexible whitespace matching too.
1518 *** Global `M-s _' starts a symbol (identifier) incremental search,
1519 and `M-s _' in Isearch toggles symbol search mode.
1520 `M-s c' in Isearch toggles search case-sensitivity.
1522 ** Navigation commands
1524 *** New binding `M-g c' for `goto-char'.
1526 *** New binding `M-g TAB' for `move-to-column'.
1528 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1529 interactively with no prefix arg. Previously, it moved to column 1.
1531 ** New option `yank-handled-properties' allows processing of text
1532 properties on yanked text, in ways that are more general than just
1533 removing them (as is done by `yank-excluded-properties').
1535 ** New option `delete-trailing-lines' specifies whether
1536 M-x delete-trailing-whitespace should delete trailing lines at the end
1537 of the buffer. It defaults to t.
1539 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1541 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1542 `ucs-insert' is now an obsolete alias for `insert-char'.
1544 ** The `z' key no longer has a binding in most special modes.
1545 It used to be bound to `kill-this-buffer', but `z' is too easy to
1548 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1549 It copies the region-rectangle as the last rectangle kill.
1553 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1555 *** New option `register-separator' specifies the register containing
1556 the text to put between collected texts for use with
1557 M-x append-to-register and M-x prepend-to-register.
1560 * Changes in Specialized Modes and Packages in Emacs 24.3
1562 ** Common Lisp emulation (CL)
1564 *** CL's main entry is now (require 'cl-lib).
1565 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1566 i.e., all its definitions have the "cl-" prefix (and internal definitions
1567 use the "cl--" prefix).
1569 If `cl' provided a feature under the name `foo', then `cl-lib'
1570 provides it under the name `cl-foo' instead; with the exceptions of the
1571 few `cl' definitions that had to use `foo*' to avoid conflicts with
1572 pre-existing Elisp entities. These have been renamed to `cl-foo'
1573 rather than `cl-foo*'.
1575 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1576 provide the old, non-prefixed names. Some exceptions are listed below:
1578 *** `cl-flet' is not like `flet' (which is deprecated).
1579 Instead it obeys the behavior of Common-Lisp's `flet'.
1580 In particular, in cl-flet function definitions are lexically scoped,
1581 whereas in flet the scoping is dynamic.
1583 *** `cl-labels' is slightly different from `labels'.
1584 The difference is that it relies on the `lexical-binding' machinery
1585 (as opposed to the `lexical-let' machinery used previously) to capture
1586 definitions in closures, so such closures will only work if `lexical-binding'
1589 *** `cl-letf' is not exactly like `letf'.
1590 The only difference is in details that relate to some deprecated usage
1591 of `symbol-function' in place forms.
1593 *** `progv' was rewritten to use the `let' machinery.
1594 A side effect is that variables without corresponding values are bound
1595 to nil rather than being made unbound.
1597 *** The following methods of extending `setf' are obsolete
1598 (use features from gv.el instead):
1599 `define-modify-macro' (use `gv-letplace')
1600 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1601 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1602 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1606 *** Changes are now highlighted using the same color scheme as in
1607 modern VCSes. Deletions are displayed in red (new faces
1608 `diff-refine-removed' and `smerge-refined-removed', and new definition
1609 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1610 and `smerge-refined-added', and new definition of `diff-added').
1612 *** The variable `diff-use-changed-face' defines whether to use the
1613 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1614 changes in context diffs.
1616 *** The new command `diff-delete-trailing-whitespace' removes trailing
1617 whitespace introduced by a diff.
1619 ** Ediff now uses the same color scheme as Diff mode.
1623 A new version of python.el, which provides several new features, including:
1624 per-buffer shells, better indentation, Python 3 support, and improved
1625 shell-interaction compatible with iPython (and virtually any other
1628 *** Some user options have been replaced/renamed, including (old -> new):
1629 **** python-indent -> python-indent-offset
1630 **** python-guess-indent -> python-indent-guess-indent-offset
1631 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1632 **** python-use-skeletons -> python-skeleton-autoinsert
1634 *** Some user options have been removed, including:
1636 **** `python-indent-string-contents': Strings are never indented.
1638 **** `python-honour-comment-indentation':
1639 Comments are always considered as indentation markers.
1641 **** `python-continuation-offset': Indentation is automatically
1642 calculated in a pep8 compliant way depending on the context.
1644 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1645 Have no direct mapping as the shell interaction is completely different.
1647 **** `python-python-command', `python-jython-command':
1648 Replaced by `python-shell-interpreter'.
1650 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1651 `python-pdbtrack-minor-mode-string', `python-source-modes':
1654 *** Some commands have been replaced (old -> new):
1655 **** python-insert-class -> python-skeleton-class
1656 **** python-insert-def -> python-skeleton-def
1657 **** python-insert-for -> python-skeleton-for
1658 **** python-insert-if -> python-skeleton-if
1659 **** python-insert-try/except -> python-skeleton-try
1660 **** python-insert-try/finally -> python-skeleton-try
1661 **** python-insert-while -> python-skeleton-while
1662 **** python-find-function -> python-nav-jump-to-defun
1663 **** python-next-statement -> python-nav-forward-sentence
1664 **** python-previous-statement -> python-nav-backward-sentence
1665 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1666 **** python-end-of-defun-function -> python-nav-end-of-defun
1667 **** python-send-buffer -> python-shell-send-buffer
1668 **** python-send-defun -> python-shell-send-defun
1669 **** python-send-region -> python-shell-send-region
1670 **** python-send-region-and-go -> emulate with python-shell-send-region
1671 and python-shell-switch-to-shell
1672 **** python-send-string -> python-shell-send-string
1673 **** python-switch-to-python -> python-shell-switch-to-shell
1674 **** python-describe-symbol -> python-eldoc-at-point
1678 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1680 *** The D-Bus object manager interface is implemented.
1682 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1683 if their value does not fit into Emacs's integer range.
1685 *** The function `dbus-call-method' is now non-blocking.
1686 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1688 *** Signals can also be sent as unicast messages.
1690 *** The argument list of `dbus-register-signal' has been extended,
1691 according to the new match rule types of D-Bus.
1693 *** `dbus-init-bus' supports private connections.
1695 *** There is a new function `dbus-setenv'.
1697 ** `desktop-path' no longer includes the "." directory.
1698 Desktop files are now located in ~/.emacs.d by default.
1702 *** `dired-do-async-shell-command' executes each file sequentially
1703 if the command ends in `;' (when operating on multiple files).
1704 Otherwise, it executes the command on each file in parallel.
1706 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1707 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1710 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1711 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1712 mark/unmark/flag all files in the active region.
1714 *** The minibuffer default for `=' (`dired-diff') has changed.
1715 It is now the backup file for the file at point, if one exists.
1716 In Transient Mark mode the default is the file at the active mark.
1718 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1719 The global binding for `M-=', `count-words-region' is in effect.
1723 *** New module "notifications", which can send a notification when you
1724 receive a private message or your nickname is mentioned.
1726 *** ERC will look up server/channel names via auth-source and use any
1729 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1730 only applies to messages sent by lurkers.
1732 ** reStructuredText mode
1734 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1735 fontification, comment handling, and customization have all been revised
1738 *** Support for `imenu' and `which-function-mode'.
1740 *** The reStructuredText syntax is more closely covered.
1741 Sphinx support has been improved.
1743 *** `rst-insert-list' inserts new list or continues existing lists.
1745 *** A negative prefix argument always works for `rst-adjust'.
1747 *** The window configuration is reset after displaying a TOC.
1749 *** The constant `rst-version' describes the rst.el package version.
1753 *** Support for percent literals and recognition of regular expressions
1754 in method calls without parentheses with more methods, including Cucumber
1757 *** Improved syntax highlighting and indentation.
1759 *** New command `ruby-toggle-block', bound to `C-c {'.
1761 *** Some non-standard keybindings/commands have been removed:
1763 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1765 **** `ruby-mark-defun'; use `mark-defun'.
1767 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1768 appropriate settings for the variables `beginning-of-defun-function'
1769 and `end-of-defun-function'.
1771 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1772 `reindent-then-newline-and-indent' and `newline' have been removed.
1774 ** Shell Script mode
1776 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1778 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1780 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1784 *** The free software compiler GHDL is supported (and now the default).
1786 *** Support for the VHDL-AMS packages has been added/updated.
1788 *** Updated to the 2002 revision of the VHDL standard.
1790 *** Accepts \r and \f as whitespace.
1794 *** The faces used by Apropos are now directly customizable.
1795 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1796 see the `apropos' Custom group for details.
1798 *** The old options whose values specified faces to use have been removed
1799 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1803 *** This package has been rewritten to use Tabulated List mode.
1805 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1806 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1810 *** Algebraic simplification mode is now the default.
1811 To restrict to the limited simplifications given by the former
1812 default simplification mode, use `m I'.
1816 *** You can customize the header text that appears above each calendar month.
1817 See the variable `calendar-month-header'.
1819 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1821 *** The calendars produced by cal-html include holidays.
1822 Customize `cal-html-holidays' to change this.
1826 *** The major modes from the parser generators "Bovine" and "Wisent"
1827 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1828 are in `auto-mode-alist', and the corresponding manuals are included.
1832 **** Menu support for the "Configuration" feature. This allows users to
1833 choose the active configuration (such as debug or install) from the menu.
1835 **** New command `ede-set' to interactively set project-local variables.
1837 **** Support for compiling, debugging, and running in "generic" projects.
1839 **** Autoconf editing support for M4 macros with complex arguments.
1841 **** Compilation support for the "linux" project type.
1843 **** "simple" projects have been removed; use "generic" projects instead.
1847 **** Support for parsing #include statements inside a namespace in C/C++.
1849 **** Improved support for 'extern "C"' declarations in C/C++.
1851 **** The ability to ignore more common special C/C++ preprocessor symbols,
1852 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1853 If available, include cdefs.h as an additional source of preprocessor symbols.
1855 **** Improved C/C++ function pointer parsing.
1857 **** In Python, support for converting imports to include file names.
1859 **** Ability to dynamically determine the Python load path.
1861 **** Support for the Python 'WITH' and 'AT' keywords.
1863 **** Improved tooltip completion.
1867 **** The SRecode manual is now included.
1869 **** Tag generation supports constructor/destructor settings and system
1870 include differentiation.
1872 **** Addition of 'Framework' support: Frameworks are specified when a
1873 particular kind of library (such as Android) is needed in a common language
1876 **** Support for nested templates and let variables override based on priority.
1878 **** Support for merging tables from multiple related modes, such as
1879 default -> c++ -> arduino.
1881 ** Compile has a new option `compilation-always-kill'.
1885 *** `custom-reset-button-menu' now defaults to t.
1887 *** Non-option variables are never matched in `customize-apropos' and
1888 `customize-apropos-options' (i.e., the prefix argument does nothing for
1889 these commands now).
1893 *** The variables `term-default-fg-color' and `term-default-bg-color'
1894 are now deprecated in favor of the customizable face `term'.
1896 *** You can customize how to display ANSI terminal colors and styles
1897 by customizing the corresponding `term-color-<COLOR>',
1898 `term-color-underline' and `term-color-bold' faces.
1902 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1904 *** Remote processes are now also supported on remote MS-Windows hosts.
1908 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1909 Previously, this slot stored semicolon-separated attribute-value pairs
1910 appended to some imap URLs, but this is not compatible with RFC 3986.
1911 So now the `filename' slot stores the entire path and query components,
1912 and the `attributes' slot is always nil.
1914 *** New function `url-encode-url' for encoding a URI string.
1915 The `url-retrieve' function now uses this to encode its URL argument,
1916 in case that is not properly encoded.
1918 ** notifications.el supports now version 1.2 of the Notifications API.
1919 The function `notifications-get-capabilities' returns the supported
1922 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1923 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1924 `flymake-warning-bitmap'.
1926 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1927 specifying URL types that should be converted to remote file names at
1928 the FFAP prompt. The default is now '("ftp").
1930 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1931 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1933 ** New option `mouse-avoidance-banish-position' specifies where the
1934 `banish' mouse avoidance setting moves the mouse.
1936 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1937 closing brackets to be aligned with the line of the opening bracket.
1939 ** In Proced mode, new command `proced-renice' renices marked processes.
1941 ** New option `async-shell-command-buffer' specifies the buffer to use
1942 for a new asynchronous `shell-command' when the default output buffer
1943 `*Async Shell Command*' is already in use.
1945 ** SQL mode has a new option `sql-db2-escape-newlines'.
1946 If non-nil, newlines sent to the command interpreter will be escaped
1947 by a backslash. The default does not escape the newlines and assumes
1948 that the sql statement will be terminated by a semicolon.
1950 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1951 (and modes that derive from it), sorts the column at point, or the Nth
1952 column if a numeric prefix argument is given.
1954 ** `which-func-modes' now defaults to t, so Which Function mode, when
1955 enabled, applies to all applicable major modes.
1957 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1960 ** Follow mode no longer works by using advice.
1961 The option `follow-intercept-processes' has been removed.
1963 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1965 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1966 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1967 *** semantic-change-hooks -> semantic-change-functions
1968 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1969 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1970 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1971 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1972 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1973 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1974 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1975 *** rcirc-activity-hooks -> rcirc-activity-functions
1976 *** rcirc-print-hooks -> rcirc-print-functions
1977 *** dbus-event-error-hooks -> dbus-event-error-functions
1978 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1979 *** checkdoc-style-hooks -> checkdoc-style-functions
1980 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1981 *** archive-extract-hooks -> archive-extract-hook
1982 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1983 *** hfy-post-html-hooks -> hfy-post-html-hook
1984 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1985 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1986 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1987 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1989 ** Obsolete packages
1992 In most cases, assoc+member+push+delq work just as well.
1993 And in any case it's just a terrible package: ugly semantics, terrible
1994 inefficiency, and not namespace-clean.
2003 * Incompatible Lisp Changes in Emacs 24.3
2005 ** Docstrings starting with `*' no longer indicate user options.
2006 Only variables defined using `defcustom' are considered user options.
2007 The function `user-variable-p' is now an obsolete alias for
2008 `custom-variable-p'.
2010 ** The return values of `defalias', `defun' and `defmacro' have changed,
2011 and are now undefined. For backwards compatibility, `defun' and
2012 `defmacro' currently return the name of the newly defined
2013 function/macro, but this should not be relied upon.
2015 ** `random' by default now returns a different random sequence in
2016 every Emacs run. Use `(random S)', where S is a string, to set the
2017 random seed to a value based on S, in order to get a repeatable
2018 sequence in later calls.
2020 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2021 that substring is inserted literally even if the LITERAL arg is
2022 non-nil, instead of causing an error to be signaled.
2024 ** `select-window' now always makes the window's buffer current.
2025 It does so even if the window was selected before.
2027 ** The function `x-select-font' can return a font spec, instead of a
2028 font name as a string. Whether it returns a font spec or a font name
2029 depends on the graphical library.
2031 ** `face-spec-set' no longer sets frame-specific attributes when the
2032 third argument is a frame (that usage was obsolete since Emacs 22.2).
2034 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2036 ** The CL package's `get-setf-method' function no longer exists.
2037 Generalized variables are now part of core Emacs Lisp, and implemented
2038 differently to the way cl.el used to do it. It is not possible to
2039 define a compatible replacement for `get-setf-method'. See the file
2040 gv.el for internal details of the new implementation.
2042 ** The arguments of `dbus-register-signal' are no longer just strings,
2043 but keywords or keyword-string pairs. The old argument list will
2044 still be supported for Emacs 24.x.
2046 ** Miscellaneous name changes
2047 Some Lisp symbols have been renamed to correct their spelling,
2048 or to be more consistent with standard Emacs terminology.
2050 *** Renamed functions
2051 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2052 **** inactivate-input-method -> deactivate-input-method
2053 **** quail-inactivate -> quail-deactivate
2054 **** robin-inactivate -> robin-deactivate
2055 **** viper-inactivate-input-method -> viper-deactivate-input-method
2056 **** viper-inactivate-input-method-action ->
2057 viper-deactivate-input-method-action
2058 **** ucs-input-inactivate -> ucs-input-deactivate
2061 The old hooks are still supported for backward compatibility, but they
2062 are deprecated and will be removed eventually.
2063 **** input-method-inactivate-hook -> input-method-deactivate-hook
2064 **** robin-inactivate-hook -> robin-deactivate-hook
2065 **** quail-inactivate-hook -> quail-deactivate-hook
2067 *** Renamed variables
2068 **** follow-deactive-menu -> follow-inactive-menu
2069 **** inactivate-current-input-method-function ->
2070 deactivate-current-input-method-function
2072 ** Some obsolete functions, variables, and faces have been removed:
2073 *** `last-input-char', `last-command-char', `unread-command-char'
2074 *** `facemenu-unlisted-faces'
2075 *** `rmail-decode-mime-charset'
2076 *** `iswitchb-read-buffer'
2077 *** `sc-version', `sc-submit-bug-report'
2078 *** `set-char-table-default'
2079 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2080 *** `compile-internal'
2082 *** `mode-line-inverse-video'
2083 *** `follow-mode-off-hook'
2084 *** `cvs-commit-buffer-require-final-newline'
2085 (use `log-edit-require-final-newline' instead)
2086 *** `cvs-changelog-full-paragraphs'
2087 (use `log-edit-changelog-full-paragraphs' instead)
2088 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2089 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2090 *** `vc-master-templates' (use `vc-handled-backends' instead)
2091 *** `vc-checkout-carefully'
2094 * Lisp Changes in Emacs 24.3
2096 ** CL-style generalized variables are now in core Elisp.
2097 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2098 You can define your own generalized variables using `gv-define-simple-setter',
2099 `gv-define-setter', etc.
2101 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2102 This can significantly speed up execution of non-byte-compiled code,
2103 but can also bump into previously unnoticed cyclic dependencies.
2104 These are generally harmless: they will simply cause the macro calls
2105 to be left for later expansion (as before), but will result in a
2106 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2107 You may wish to restructure your code so this does not happen.
2109 ** New sampling-based Elisp profiler.
2110 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2111 When finished, use M-x profiler-stop. The sampling rate can be based on
2112 CPU time or memory allocations.
2114 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2115 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2117 ** New macros `setq-local' and `defvar-local'.
2119 ** Face underlining can now use a wave.
2121 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2122 of `read-regexp' accepts a string ending with a colon and space, and its
2123 second argument DEFAULTS can be a list of strings accessible via `M-n'
2124 in the minibuffer ahead of other hard-coded useful regexp-related values.
2125 More commands use `read-regexp' now to read their regexp arguments.
2129 *** New function `completion-table-with-quoting' to handle completion
2130 in the presence of quoting, such as file completion in shell buffers.
2132 *** New function `completion-table-subvert' to use an existing completion
2133 table, but with a different prefix.
2137 *** New error type and new function `user-error'.
2138 These do not trigger the debugger.
2140 *** New option `debugger-bury-or-kill', saying what to do with the
2141 debugger buffer when exiting debug.
2143 *** Set `debug-on-message' to enter the debugger when a certain
2144 message is displayed in the echo area. This can be useful when trying
2145 to work out which code is doing something.
2147 *** New var `inhibit-debugger', automatically set to prevent accidental
2148 recursive invocations.
2152 *** New command `fit-frame-to-buffer' adjusts the frame height to
2155 *** The command `fit-window-to-buffer' can adjust the frame height
2156 if the new option `fit-frame-to-buffer' is non-nil.
2158 *** New macro `with-temp-buffer-window', similar to
2159 `with-output-to-temp-buffer'.
2161 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2164 *** New option `switch-to-buffer-preserve-window-point' to restore a
2165 window's point when switching buffers.
2167 *** New display action alist entries `window-height' and `window-width'
2168 specify the size of new windows created by `display-buffer'.
2170 *** New display action alist entry `pop-up-frame-parameters', if
2171 non-nil, specifies frame parameters to give any newly-created frame.
2173 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2174 tells display action functions to avoid changing which frame is
2177 *** New display action alist entry `previous-window', if non-nil,
2178 specifies window to reuse in `display-buffer-in-previous-window'.
2180 *** New display action functions `display-buffer-below-selected',
2181 and `display-buffer-in-previous-window'.
2183 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2184 now accept a third argument to avoid choosing the selected window.
2186 *** Additional values recognized for option `window-combination-limit'.
2188 *** The following variables are obsolete, as they can be replaced by
2189 appropriate entries in the `display-buffer-alist' function introduced
2191 **** `dired-shrink-to-fit'
2192 **** `display-buffer-reuse-frames'
2193 **** `display-buffer-function'
2194 **** `special-display-buffer-names'
2195 **** `special-display-frame-alist'
2196 **** `special-display-function'
2197 **** `special-display-regexps'
2201 *** `current-time-string' no longer requires that its argument's year
2202 must be in the range 1000..9999. It now works with any year supported
2203 by the underlying C implementation.
2205 *** `current-time' now returns extended-format time stamps
2206 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2207 PSEC is typically a multiple of 1000 on current machines. Other
2208 functions that use this format, such as `file-attributes' and
2209 `format-time-string', have been changed accordingly. Old-format time
2210 stamps are still accepted.
2212 *** The format of timers in `timer-list' and `timer-idle-list' is now
2213 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2214 The PSECS slot is new, and uses picosecond resolution. It can be
2215 accessed via the new `timer--psecs' accessor.
2217 *** Last-modified time stamps in undo lists now are of the form
2218 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2222 *** Improved security when handling persistent objects:
2224 **** `eieio-persistent-read' now features optional arguments for specifying
2225 the class to load, as well as a flag stating whether subclasses are allowed;
2226 if provided, other classes will be rejected by the reader. For
2227 compatibility with existing code, if the class is omitted only a
2230 **** New specialized reader for pulling in classes and signaling errors
2231 without evaluation of suspicious code.
2233 **** All slots that contain objects must have a :type. Slots with lists
2234 of objects must use a new type predicate for a list of an object type.
2236 *** Support for `find-function' and similar utilities, through the addition
2237 of filename support to generated symbols.
2239 ** Floating point functions now always return special values like NaN,
2240 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2241 Previously, they returned NaNs on some platforms but signaled errors
2242 on others. The affected functions are acos, asin, tan, exp, expt,
2243 log, log10, sqrt, and mod.
2245 ** New fringe bitmap `exclamation-mark'.
2247 ** Miscellaneous changes to special forms and macros
2249 *** `defun' and `defmacro' are now macros rather than special forms.
2251 *** `kbd' is now a function rather than a macro.
2253 ** Miscellaneous new functions
2255 *** `set-temporary-overlay-map' sets up a temporary keymap that
2256 takes precedence over most other maps for a short while (normally one key).
2258 *** `autoloadp' tests if its argument is an autoloaded object.
2260 *** `autoload-do-load' performs the autoloading operation.
2262 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2264 *** `file-name-base' returns a file name sans directory and extension.
2266 *** `function-get' fetches a function property, following aliases.
2268 *** `posnp' tests if an object is a `posn'.
2270 *** `system-users' returns the user names on the system.
2272 *** `system-groups' returns the group names on the system.
2274 *** `tty-top-frame' returns the topmost frame of a text terminal.
2276 ** The following functions and variables are obsolete:
2277 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2278 *** `buffer-has-markers-at'
2279 *** `macro-declaration-function' (use `macro-declarations-alist')
2280 *** `window-system-version' (provides no useful information)
2281 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2282 *** `query-replace-interactive'
2283 *** `font-list-limit' (has had no effect since Emacs < 23)
2286 * Changes in Emacs 24.3 on Non-Free Operating Systems
2288 ** Cygwin builds can use the native MS Windows user interface.
2289 Pass `--with-w32' to configure. The default remains the X11 interface.
2291 ** Two new functions are available in Cygwin builds:
2292 `cygwin-convert-file-name-from-windows' and
2293 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2294 code to access the Cygwin file-name mapping machinery to convert
2295 between Cygwin and Windows-native file and directory names.
2297 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2298 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2299 `mouse-autoselect-window'.
2301 ** On MS Windows Vista and later Emacs now supports symbolic links.
2303 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2304 support for libxml2, even if its presence is detected.
2306 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2308 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2309 directories to the search path. You must add them yourself if you want them.
2312 * Changes in Emacs 24.2
2314 ** This is mainly a bug-fix release.
2317 * Installation Changes in Emacs 24.1
2319 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2320 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2321 also depend on Gtk+. You can disable them with --without-rsvg and
2324 ** Emacs can be compiled with GnuTLS support.
2325 This happens by default if a suitably recent version of the library is
2326 found at build time. To prevent this, use the configure option
2327 `--without-gnutls'. See below for GnuTLS features.
2329 ** Emacs can be compiled with SELinux support.
2330 This happens by default if a suitably recent version of the library is
2331 found at build time. To prevent this, use the configure option
2332 `--without-selinux'. See below for SELinux features.
2334 ** Emacs can be compiled with ImageMagick support.
2335 This happens by default if a suitably recent version of the library is
2336 found at build time. To prevent this, use the configure option
2337 `--without-imagemagick'. See below for ImageMagick features.
2338 This feature is not available for the Nextstep or MS ports.
2340 ** Emacs can be compiled with libxml2 support.
2341 This happens by default if a suitably recent version of the library is
2342 found at build time. To prevent this, use the configure option
2343 `--without-xml2'. See below for libxml2 features.
2345 ** By default, the installed Info and man pages are compressed.
2346 You can disable this by configuring --without-compress-info.
2348 ** New configure option --with-wide-int.
2349 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2350 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2353 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2354 These provide no new functionality, they just remove the need to edit
2355 lib-src/Makefile by hand in order to use the associated features.
2357 ** New configure option --enable-use-lisp-union-type.
2358 This is only useful for Emacs developers to debug certain types of bugs.
2359 This is not a new feature; only the configure flag is new.
2361 ** The standalone programs digest-doc and sorted-doc are removed.
2362 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2364 ** The standalone program `fakemail' is removed.
2365 If you need it, feedmail.el provides a superset of the functionality.
2368 * Startup Changes in Emacs 24.1
2370 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2371 command line arguments, and the EMACS_UNIBYTE environment variable, no
2372 longer have any effect. (They were declared obsolete in Emacs 23.)
2374 ** New command line option `--no-site-lisp' removes site-lisp directories
2375 from load-path. -Q now implies this. This option does not affect the
2376 EMACSLOADPATH environment variable (and hence has no effect for
2380 * Changes in Emacs 24.1
2384 *** Many packages now use the `completion-at-point' command,
2385 rather than implementing separate completion commands.
2387 *** `completion-at-point' now handles tags and semantic completion.
2389 *** Completion in a non-minibuffer now tries to detect the end of completion
2390 and pops down the *Completions* buffer accordingly.
2392 *** New option `completion-cycle-threshold' allows completion cycling.
2394 *** New option `completion-category-overrides' for overriding the
2395 default completion style in certain circumstances.
2397 *** New completion style `substring'.
2399 *** Completion of buffer names uses `substring' completion by default.
2401 *** The option `widget-complete-field' has been removed.
2405 *** The first time you try sending mail, Emacs asks for a mail method.
2406 This is implemented by a new default for `send-mail-function', which
2407 is `sendmail-query-once'. This offers to use the smtpmail package, or
2408 to use the old defaults relying on external mail facilities
2409 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2410 `mailclient-send-it' on Windows).
2412 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2413 transfers the report to your desktop's preferred mail client, if there
2414 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2417 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2418 and Mail mode changes
2420 ** Emacs server and client changes
2422 *** New option `server-port' specifies the port for TCP Emacs servers.
2424 *** New emacsclient argument -q/--quiet suppresses some status messages.
2426 *** New emacsclient argument --frame-parameters specifies the frame
2427 parameters of any newly-created graphical frame.
2429 *** If emacsclient shuts down due to Emacs signaling an error,
2430 its exit status is 1.
2432 *** New emacsclient argument --parent-id ID.
2433 This opens a client frame in parent X window ID, via XEmbed, similar
2434 to the --parent-id argument to Emacs.
2436 ** Internationalization changes
2438 *** Emacs now supports display and editing of bidirectional text.
2439 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2440 displayed in the correct visual order as expected by users of those
2441 scripts. The display reordering is a "full bidirectionality" class
2442 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2443 with no RTL text should look exactly the same as before.
2445 **** New buffer-local variable `bidi-display-reordering'.
2446 To disable display reordering in a buffer, change this to nil.
2448 **** New buffer-local variable `bidi-paragraph-direction'.
2449 If nil (the default), Emacs determines the base direction of each
2450 paragraph from its text, as specified by the UBA. Setting the value
2451 to `right-to-left' or `left-to-right' forces a base direction on each
2454 Paragraphs with right-to-left base direction are displayed starting at
2455 the right window edge.
2457 *** Enhanced support for characters with no glyphs in available fonts,
2458 or, on text terminals, characters that cannot be encoded by the
2459 terminal coding system. The new option `glyphless-char-display-control'
2460 specifies how to display them: as a hexadecimal code in a box, a thin
2461 1-pixel space, an empty box, etc.
2463 *** New input methods for Farsi and Bulgarian
2464 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2466 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2467 (U+2010 and U+2011).
2469 *** New Hebrew translation of the Emacs Tutorial.
2470 Type `C-u C-h t' to choose it in case your language setup doesn't
2471 automatically select it.
2473 ** An Emacs Lisp package manager is now included.
2474 This is a convenient way to download and install additional packages,
2475 from a package repository at http://elpa.gnu.org.
2477 *** M-x list-packages shows a list of packages, which can be
2478 selected for installation.
2480 *** New command `describe-package', bound to `C-h P'.
2482 *** By default, all installed packages are loaded automatically when
2483 Emacs starts up. To disable this, set `package-enable-at-startup' to
2484 nil. To specify the packages to load, customize `package-load-list'.
2486 ** Custom theme changes
2488 *** New command `M-x customize-themes', which provides a convenient
2489 interface for enabling and disabling Custom themes.
2491 *** New option `custom-theme-load-path' is the load path for themes.
2492 Emacs no longer looks for Custom themes in `load-path'. The default
2493 value of `custom-theme-load-path' says to look for themes in
2494 `custom-theme-directory', followed by a subdirectory of
2495 `data-directory' named "themes/", which contains a small selection of
2496 built-in Custom themes.
2498 *** New option `custom-safe-themes' records known-safe theme files.
2499 If a theme is not in this list, Emacs queries before loading it, and
2500 offers to save the theme to `custom-safe-themes' automatically. By
2501 default, all themes included in Emacs are treated as safe.
2503 ** Improved GTK integration
2505 *** GTK scroll-bars are now placed on the right by default.
2506 The function `set-scroll-bar-mode' can change this.
2508 *** GTK tool bars can have just text, just images or images and text.
2509 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2510 the default is taken from desktop settings.
2512 *** GTK tool bars can be placed on any edge of the frame.
2513 The frame-parameter tool-bar-position controls this. It takes the
2514 values top, left, right or bottom. The Options => Show/Hide menu has
2517 *** The default colors for selected text (the `region' face) are taken
2518 from the GTK theme when Emacs is built with GTK.
2520 *** Emacs uses GTK tooltips by default if built with GTK.
2521 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2523 ** Graphical interface changes
2525 *** On graphical displays, the mode-line no longer ends in dashes.
2526 Also, the first dash (which does not indicate anything) is just
2527 displayed as a space.
2529 *** `menu-bar-select-buffer-function' lets you choose another operation
2530 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2532 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2533 built with Xft. These fonts can be set via X resources, for example:
2534 Emacs.pane.menubar.font: Courier-12
2538 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2539 or if it receives a SIGINT signal in batch mode.
2541 *** `kill-emacs-hook' is now also run in batch mode.
2542 Third-party code which adds to `kill-emacs-hook' should check if they
2543 do the right thing in batch mode.
2545 ** Scrolling changes
2547 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2548 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2549 of buffer at first key-press (instead they move to top/bottom of buffer)
2550 when `scroll-error-top-bottom' is non-nil.
2552 *** New option `scroll-error-top-bottom' (see above).
2554 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2555 scroll a line instead of full screen.
2557 *** New property `scroll-command' should be set on a command's symbol to
2558 define it as a scroll command affected by `scroll-preserve-screen-position'.
2560 *** If you customize `scroll-conservatively' to a value greater than 100,
2561 Emacs will never recenter point in the window when it scrolls due to
2562 cursor motion commands or commands that move point (e.f., `M-g M-g').
2563 Previously, you needed to use `most-positive-fixnum' as the value of
2564 `scroll-conservatively' to achieve the same effect.
2566 *** "Aggressive" scrolling now honors the scroll margins.
2567 If you customize `scroll-up-aggressively' or
2568 `scroll-down-aggressively' and move point off the window, Emacs now
2569 scrolls the window so as to avoid positioning point inside the scroll
2572 ** Basic SELinux support has been added.
2573 This requires Emacs to be linked with libselinux at build time.
2575 *** Emacs preserves the SELinux file context when backing up.
2576 Also, the function `copy-file' has an extra optional argument for
2577 preserving SELinux context, and the return value of `backup-buffer'
2578 now includes the SELinux context.
2580 *** New functions `file-selinux-context' and `set-file-selinux-context'
2581 get and set the SELinux context of a file.
2585 *** `delete-by-moving-to-trash' now only affects commands that specify
2586 trashing. This avoids inadvertently trashing temporary files.
2588 *** Calling `delete-file' or `delete-directory' with a prefix argument
2589 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2591 ** File- and directory-local variable changes
2593 *** You can stop directory local vars from applying to subdirectories.
2594 Add an element (subdirs . nil) to the alist portion of any variables
2595 settings to indicate that the section should not apply to
2598 *** Directory local variables can apply to some file-less buffers.
2599 Affected modes include dired, vc-dir, and log-edit. For example,
2600 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2601 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2602 `hack-dir-local-variables-non-file-buffer' to support this.
2604 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2605 Instead, use "eval: (minor-mode 1)".
2607 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2608 to `inhibit-local-variables-regexps'. As the name suggests, it now
2609 applies to ALL file local variables, not just -*- lines. The
2610 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2615 *** The `quit-window' command now restores the last buffer displayed
2616 in the quitted window.
2618 *** Resizing an Emacs frame now preserves proportional window sizes,
2619 modulo restrictions like window minimum sizes and fixed-size windows.
2621 *** The behavior of `display-buffer' is now customizable in detail.
2623 **** New option `display-buffer-base-action' specifies a list of
2624 user-determined display "actions" (functions and optional arguments
2625 for choosing the displaying window).
2627 This takes precedence over the default display action, which is
2628 specified by `display-buffer-fallback-action'.
2630 **** New option `display-buffer-alist' maps buffer name regexps to
2631 display actions, taking precedence over `display-buffer-base-action'.
2633 *** New option `window-combination-limit'.
2634 The new option `window-combination-limit' allows to return the space
2635 obtained for resizing or creating a window more reliably to the window
2636 from which such space was obtained.
2638 *** New option `window-combination-resize'.
2639 The new option `window-combination-resize' allows to split a window that
2640 otherwise cannot be split because it's too small by stealing space from
2641 other windows in the same combination. Subsequent resizing or deletion
2642 of the window will resize all windows in the same combination as well.
2644 *** New option `frame-auto-hide-function' lets you choose between
2645 iconifying or deleting a frame when burying a buffer in a dedicated
2646 frame, or quitting a window showing a buffer in a frame of its own.
2648 *** New commands `maximize-window' and `minimize-window'.
2649 These maximize and minimize the size of a window within its frame.
2651 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2652 These functions allow to navigate through the live buffers that have
2653 been shown in a specific window.
2655 ** Minibuffer changes
2657 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2658 This is handy for minibuffer-only frames, and is also used for the feature
2659 where mouse-1 pops up *Messages*"', which can now easily be changed.
2661 *** Minibuffers set `truncate-lines' to nil.
2662 If you want to change the value to something else, you could use
2663 for example `minibuffer-setup-hook'.
2665 ** `auto-mode-case-fold' is now enabled by default.
2667 ** `backup-by-copying-when-mismatch' now defaults to t.
2669 ** New basic faces `error', `warning', `success'.
2670 These are used to highlight text indicating failure, caution or
2671 successful operation.
2673 ** New option `list-colors-sort' defines the color sort order
2674 for `list-colors-display'.
2676 ** The variable `focus-follows-mouse' now always defaults to nil.
2679 * Editing Changes in Emacs 24.1
2683 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2684 `isearch-yank-line'.
2686 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2687 `isearch-yank-kill'.
2689 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2691 ** New commands `count-words-region' and `count-words'.
2693 *** M-= is bound to `count-words-region', not `count-lines-region'.
2694 The `count-words-region' command, when called interactively, reports
2695 the number of lines, words, and characters in the region. It is a
2696 superset of the old `count-lines-region', which is now an obsolete
2699 ** The command `just-one-space' (M-SPC), if given a negative argument,
2700 also deletes newlines around point.
2704 *** New option `delete-active-region'.
2705 If non-nil, [delete] and DEL delete the region if it is active and no
2706 prefix argument is given. If set to `kill', those commands kill
2709 *** New command `delete-forward-char', bound to [delete].
2710 This is meant for interactive use, and obeys `delete-active-region'.
2711 The command `delete-char' does not obey `delete-active-region'.
2713 *** `delete-backward-char' is now a Lisp function.
2714 Apart from obeying `delete-active-region', its behavior is unchanged.
2715 However, the byte compiler now warns if it is called from Lisp; Lisp
2716 callers should use delete-char with a negative argument instead.
2718 *** The option `mouse-region-delete-keys' has been deleted.
2720 ** Selection changes.
2722 The default handling of clipboard and primary selections has been
2723 changed to conform with modern X applications. In short, most
2724 commands for killing and yanking text now use the clipboard, while
2725 mouse commands use the primary selection.
2727 In the following, we provide a list of these changes, followed by a
2728 list of steps to get the old behavior back if you prefer that.
2730 *** `select-active-regions' now defaults to t.
2731 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2732 the kill ring. The selected text is put in the primary selection, if
2733 the system possesses a separate primary selection facility (e.g. X).
2735 **** `select-active-regions' also accepts a new value, `only'.
2736 This means to only set the primary selection for temporarily active
2737 regions (usually made by mouse-dragging or shift-selection);
2738 "ordinary" active regions, such as those made with C-SPC followed by
2739 point motion, do not alter the primary selection.
2741 **** `mouse-drag-copy-region' now defaults to nil.
2743 *** mouse-2 is now bound to `mouse-yank-primary'.
2744 This pastes from the primary selection, ignoring the kill-ring.
2745 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2747 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2749 *** `x-select-enable-primary' now defaults to nil.
2750 Thus, commands that kill text or copy it to the kill-ring (such as
2751 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2753 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2754 exactly equivalent to M-w, C-w, and C-y respectively.
2756 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2757 non-nil by default, as Windows does not support the primary selection
2758 between applications.
2760 *** To return to the previous behavior, do the following:
2762 **** Change `select-active-regions' to nil.
2763 **** Change `mouse-drag-copy-region' to t.
2764 **** Change `x-select-enable-primary' to t (on X only).
2765 **** Change `x-select-enable-clipboard' to nil.
2766 **** Bind `mouse-yank-at-click' to mouse-2.
2768 *** Support for X cut buffers has been removed.
2770 *** X clipboard managers are now supported.
2771 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2773 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2774 in the current rectangle. With a prefix argument, this prompts for a
2775 number to count from and for a format string.
2777 ** `redisplay-dont-pause' now defaults to t.
2778 This makes Emacs feel more responsive to editing commands that arrive
2779 at high rate, e.g. if you lean on some key, because stopping redisplay
2780 in the middle (when this variable is nil) forces more expensive
2781 updates later on, and Emacs appears to be unable to keep up.
2783 ** The behavior of <TAB> for active regions in Text mode has changed.
2784 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2785 when the region is active causes Emacs to indent all the lines in the
2786 region, aligning them with the line previous to the first line in the
2787 region (or with the left margin if there is no previous line).
2789 ** When `occur' is called with a prefix argument, matching strings are
2790 collected into the `*Occur*' buffer without line numbers. If there
2791 are parenthesized subexpressions in the specified regexp, `occur'
2792 reads replacement text that may contain \\& and \\N whose convention
2793 follows `replace-match'.
2796 * Changes in Specialized Modes and Packages in Emacs 24.1
2798 ** Archive Mode has basic support for browsing and updating 7z archives.
2802 *** BibTeX mode now supports biblatex.
2803 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2804 `bibtex-entry-field-alist' is now an obsolete alias for
2805 `bibtex-BibTeX-entry-alist'.
2807 *** New command `bibtex-search-entries', bound to C-c C-a.
2809 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2811 *** New variable `bibtex-search-entry-globally'.
2815 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2817 *** The default browser used by the package is now the "xdg-open" program,
2818 on platforms that support it. This calls your desktop's preferred browser.
2822 *** Support for musical notes.
2824 *** Support for logarithmic units.
2826 *** No longer uses the tex prefix for TeX specific unit names when
2827 using TeX or LaTeX mode.
2829 *** New option to highlight selections using faces.
2831 *** `calc-histogram' has the option of using a vector to determine the bins.
2833 *** New "O" option prefix.
2835 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2837 ** Calendar, Diary, and Appt
2839 *** Diary entries can contain non-printing "comments".
2840 See the variable `diary-comment-start'.
2842 *** Appointments can specify their individual warning times.
2843 See the variable `appt-warning-time-regexp'.
2845 *** The function specified by `appt-disp-window-function' may be passed
2846 lists of arguments if multiple appointments are due at similar times.
2847 If you are using a custom function for this, you should update it.
2849 *** New function `diary-hebrew-birthday'.
2851 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2852 may no longer be nil, but must all be strings.
2854 *** The obsolete (since Emacs 22.1) method of enabling the appt
2855 package by adding `appt-make-list' to `diary-hook' has been removed.
2856 Use `appt-activate' instead.
2858 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2859 appt-issue-message (use the function appt-activate)
2860 appt-visible/appt-msg-window (use the variable appt-display-format)
2862 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2863 view-diary-entries, list-diary-entries, show-all-diary-entries
2867 *** New feature to "guess" the style in an existing buffer.
2868 The main entry point is M-x c-guess.
2870 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2872 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2873 Thus C-M-a will, by default, go to the beginning of the immediate function,
2876 *** "Macros with semicolons" can be registered for correct indentation.
2877 Where such a macro ends a line (no semicolon) the next statement is no longer
2878 parsed as a statement continuation.
2880 ** Comint and modes derived from it use the standard completion code.
2884 *** Compilation mode can be used without Font Lock mode.
2885 `compilation-parse-errors-function' is now obsolete.
2887 *** New variable `compilation-filter-start', which is bound while
2888 `compilation-filter-hook' runs. It records the start position of the
2889 text inserted by `compilation-filter'.
2891 *** `compilation-error-screen-columns' and `compilation-first-column'
2892 are obeyed in the editing buffer. So programming language modes can
2893 set them, whereas previously only the value in the *Compilation*
2898 *** Customize buffers now contain a search field.
2899 The search is performed using `customize-apropos'.
2900 To turn off the search field, set `custom-search-field' to nil.
2902 *** Options in customize group buffers start out hidden if not customized.
2903 Use the arrow to the left of the option name to toggle visibility.
2905 *** custom-buffer-sort-alphabetically now defaults to t.
2907 *** The color widget now has a "Choose" button, which allows you to
2908 choose a color via `list-colors-display'.
2912 *** It is now possible to access buses other than the default system
2915 *** The `dbus-register-method' and `dbus-register-property' functions
2916 optionally do not register names.
2918 *** The new function `dbus-register-service' registers a known service
2919 name on a D-Bus without also registering a property or a method.
2923 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2924 if called with a prefix argument, read a file name from the minibuffer
2925 instead of using the current buffer.
2927 *** The "dired local variables" feature of Dired-x is obsolete.
2928 The standard directory local variables feature replaces it.
2932 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2933 controlling attempts to autojoin a channel.
2935 *** New variable `erc-coding-system-precedence': If we use `undecided'
2936 as the server coding system, this variable will then be consulted.
2937 The default is to decode strings that can be decoded as utf-8 as
2938 utf-8, and do the normal `undecided' decoding for the rest.
2942 *** The default value of `eshell-directory-name' has changed
2943 to be an "eshell" directory in `user-emacs-directory'.
2944 The old "~/.eshell/" directory is still used if it exists, though.
2948 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2949 It now supports multithread non-stop debugging and simultaneous
2950 debugging of several threads.
2954 *** RET (`image-toggle-animation') toggles animation, if applicable.
2955 Animation plays once, unless the option `image-animate-loop' is non-nil.
2959 *** New command M-x info-display-manual displays a named Info manual.
2960 If that manual is already visited in some Info buffer, it displays
2961 that buffer. (This is handy if you have many manuals in many *info*
2962 buffers, and don't remember the name of the buffer visiting the manual
2963 you want to consult.) Otherwise, it loads and displays the manual.
2965 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2966 This is for compatibility with the stand-alone Info reader program,
2967 and also because `Info-edit' is a rarely used command that is disabled
2970 ** Mail mode changes (not Message mode)
2972 *** New command M-x mail-add-attachment for adding MIME attachments
2974 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2975 (Its name is misleading, since it has nothing to do with MIME
2976 attachments.) The old name is now an obsolete alias to the new name.
2978 ** MH-E has been updated to MH-E version 8.3.1.
2979 See MH-E-NEWS for details.
2981 ** Modula-2 mode provides auto-indentation.
2983 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2985 ** nXML mode no longer binds C-RET to `nxml-complete'.
2986 Completion is now performed via `completion-at-point', bound to C-M-i
2987 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2988 default), this performs tag completion.
2990 ** Org mode has been updated to version 7.8.09.
2991 See ORG-NEWS for details.
2993 ** Prolog mode has been completely revamped, with lots of additional
2994 functionality such as more intelligent indentation, electricity,
2995 support for more variants, including Mercury, and a lot more.
2999 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
3000 in the Rmail incoming message.
3002 *** The variable `rmail-message-filter' no longer has any effect.
3003 This change was made in Emacs 23.1 but was not advertised at the time.
3004 Try using `rmail-show-message-hook' instead.
3008 *** M-x shell prompts for the shell path name if the default directory
3009 is a remote file name and neither the environment variable $ESHELL nor
3010 the variable `explicit-shell-file-name' is set.
3012 *** TAB is now bound to the standard `completion-at-point' command,
3013 which now implements the pcomplete rules for shell command completion.
3017 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
3018 if the mail server supports them. This uses either built-in GnuTLS
3019 support, or the starttls.el library. Customize `smtpmail-stream-type'
3022 *** The variable `smtpmail-auth-credentials' has been removed.
3023 By default, the information is now stored in the file ~/.authinfo.
3024 This was the default value of smtpmail-auth-credentials. If you had
3025 customized smtpmail-auth-credentials to a list of user names and
3026 passwords, those settings are not used. During your first connection
3027 to the smtp server, Emacs will prompt for the user name and password,
3028 and offer to save them to ~/.authinfo. Or you can manually copy the
3029 credentials to ~/.authinfo. For example, if you had
3031 (setq smtpmail-auth-credentials
3032 '(("mail.example.org" 25 "jim" "s!cret")))
3034 then the equivalent line in ~/.authinfo would be
3036 machine mail.example.org port 25 login jim password s!cret
3038 See the auth-source manual for more information, e.g. on encrypting
3039 the credentials file.
3041 *** The variable `smtpmail-starttls-credentials' has been removed.
3042 If you had that set, you need to put
3044 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3046 in your ~/.authinfo file instead.
3048 *** SMTPmail defaults to using the address in the From: header as the
3049 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3050 to the address you wish to use instead.
3054 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3055 and `sql-oracle-scan-on'.
3057 *** New options controlling prompting for login parameters.
3058 Each supported product has a custom variable `sql-*-login-params',
3059 which is a list of the parameters to be prompted for before a
3060 connection is established.
3062 *** The command `sql-product-interactive' now takes a prefix argument,
3063 which causes it to prompt for an SQL product.
3065 *** Product-specific SQL interactive commands now take prefix arguments.
3066 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3067 given a prefix argument, prompt for a name for the SQL interactive
3068 buffer. This reduces the need for calling `sql-rename-buffer'.
3070 *** SQL interactive modes suppress command continuation prompts, and
3071 replace tabs with spaces. The first change impacts multiple line SQL
3072 statements entered with C-j between each line, statements yanked into
3073 the buffer and statements sent with `sql-send-*' functions. The
3074 second prevents the MySQL and Postgres interpreters from listing
3075 object name completions when sent text via `sql-send-*' functions.
3077 *** New command `sql-connect' starts a predefined SQLi session,
3078 using the login parameters from `sql-connection-alist'.
3080 *** New "Save Connection" menu item in SQLi buffers.
3081 This gathers the login params specified for the SQLi session, if it
3082 was not started by a connection, and saves them as a new connection.
3084 *** New commands for listing database objects and details:
3085 sql-list-all and sql-list-table.
3087 *** An API for manipulating SQL product definitions has been added.
3091 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3095 *** New inline access method "ksu" (kerberized su).
3097 *** The following access methods are discontinued: "ssh1_old",
3098 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3100 *** The user option `remote-file-name-inhibit-cache' controls whether
3101 remote file attributes are cached for better performance.
3103 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3104 default value to "".
3106 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3107 for remote machines which support SELinux.
3109 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3110 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3111 the degree of parallelism.
3113 ** VC and related modes
3115 *** Support for pulling on distributed version control systems.
3116 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3117 supported (currently with Bzr, Git, and Mercurial), to update the
3118 current branch and working tree. A prefix argument means to prompt
3119 the user for specifics, e.g. a pull location.
3121 *** `vc-update' is now an alias for `vc-pull'.
3123 *** Support for merging on distributed version control systems.
3124 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3125 is supported (currently with Bzr, Git, and Mercurial), to merge
3126 changes from another branch into the current one. It prompts for
3127 specifics, e.g. a merge source.
3129 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3130 shows a diff while querying the user. It defaults to t.
3132 *** Log entries in some Log View buffers can be toggled to display a
3133 longer description by typing RET (log-view-toggle-entry-display).
3134 This is currently supported for Bzr, Git, and Mercurial (to support
3135 another backend, define a `log-view-expanded-log-entry-function').
3136 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3137 use this to display the full log entry for the revision at point.
3139 *** New command `vc-ediff' allows visual comparison of two revisions
3140 of a file similar to `vc-diff', but using ediff backend.
3142 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3143 this was not advertised at the time.
3145 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3146 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3147 this was not advertised at the time.
3153 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3155 *** partial-completion-mode (complete.el) is obsolete.
3156 You can get a comparable behavior with:
3157 (setq completion-styles '(partial-completion initials))
3158 (setq completion-pcm-complete-word-inserts-delimiters t)
3160 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3162 *** pgg is obsolete (use EasyPG instead).
3164 *** sregex.el is obsolete, since rx.el is a strict superset.
3166 *** s-region.el and pc-select.el are obsolete.
3167 They are superseded by shift-select-mode, enabled by default since 23.1.
3169 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3173 *** The Landmark game is now invoked with `landmark', not `lm'.
3174 Its functions and variables have been similarly renamed.
3176 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3177 (This interfered with cua-mode.)
3179 *** f90.el has some support for Fortran 2008 syntax.
3181 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3183 *** New command `nato-region' converts text to NATO phonetic alphabet.
3186 * New Modes and Packages in Emacs 24.1
3188 ** Occur Edit mode applies edits made in *Occur* buffers to the
3189 original buffers. It is bound to "e" in Occur mode.
3191 ** New global minor mode electric-pair-mode.
3192 When enabled, typing an open parenthesis automatically inserts the
3193 matching closing one.
3195 ** New global minor mode electric-indent-mode.
3196 When enabled, typing certain characters triggers reindentation.
3197 Major modes wishing to use this can set electric-indent-chars or
3198 electric-indent-functions.
3200 ** New global minor mode electric-layout-mode.
3201 When enabled, typing certain characters automatically inserts newlines.
3202 Major modes wishing to use this can set electric-layout-rules.
3204 ** tabulated-list.el provides a generic major mode for tabulated data,
3205 from which other modes can be derived.
3207 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3209 ** secrets.el is an implementation of the Secret Service API, an
3210 interface to password managers like GNOME Keyring or KDE Wallet. The
3211 Secret Service API requires D-Bus for communication. The command
3212 `secrets-show-secrets' offers a buffer with a visualization of the
3215 ** notifications.el provides an implementation of the Desktop
3216 Notifications API. It requires D-Bus for communication.
3218 ** soap-client.el supports access to SOAP web services from Emacs.
3219 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3221 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3223 ** New emacs-lock.el package.
3224 The previous version has been moved to obsolete/old-emacs-lock.el.
3225 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3226 against exiting Emacs and killing the buffer can be set separately.
3227 The mechanism for automatically turning off protection for buffers
3228 with dead inferior processes has been generalized.
3231 * Incompatible Lisp Changes in Emacs 24.1
3233 ** Passing a nil argument to a minor mode function call now ENABLES
3234 the minor mode unconditionally. This is so that you can write e.g.
3236 (add-hook 'text-mode-hook 'foo-mode)
3238 to enable foo-mode in Text mode buffers, removing the need for
3239 `turn-on-foo-mode' style functions. This affects all mode commands
3240 defined by `define-minor-mode'. If called interactively, the mode
3241 command still toggles the minor mode.
3243 ** The return value of `backup-buffer' has changed.
3244 It is now a list of three elements, where the second element is a list
3245 describing the original file's SELinux context. If Emacs or the
3246 system lacks SELinux support, the context list is (nil nil nil nil).
3247 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3249 ** `char-direction-table' and the `char-direction' function were deleted.
3250 They were buggy and inferior to the new support of bidirectional
3251 editing introduced in Emacs 24. If you need the bidirectional
3252 properties of a character, use `get-char-code-property' with the last
3253 argument `bidi-class'.
3255 ** `copy-directory' now copies the source directory as a subdirectory
3256 of the target directory, if the latter is an existing directory. The
3257 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3258 the contents directly into a pre-existing target directory.
3260 ** For mouse click input events in the text area, the Y pixel
3261 coordinate in the POSITION list now counts from the top of the text
3262 area, excluding any header line. Previously, it counted from the top
3265 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3266 been further reduced. Now a backquote not followed by a space is
3267 always treated as a "new-style" backquote. Please remove all
3268 "old-style" backquotes from your code. If your code uses backquotes
3269 as documented in the Elisp manual, and compiles without warning, then
3270 you have nothing to do in this regard. Code not following the
3271 appropriate conventions may fail to compile.
3273 The most common cause of trouble seems to be an old-style backquote
3274 followed by a newline. Another cause of trouble is vector notation
3275 for key sequence notation: instead of [(control ,)] and [(control ')],
3276 you should write [(control ?,)] and [(control ?')], which will work in
3279 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3280 was not advertised at the time. The function `custom-initialize-delay'
3281 replaced all known uses.
3283 ** `view-buffer' now treats special mode-class in the same way that
3284 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3285 major mode is special).
3287 ** Menu and tool bar changes
3289 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3290 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3291 With these alist entries omitted, `make-frame' checks the value of the
3292 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3293 a menu-bar or tool-bar, respectively. If the alist entries are added,
3294 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3296 *** The menu bar bindings's caches are not used any more.
3297 Use (where-is-internal <def> nil t) instead.
3299 ** Regions created by mouse dragging are now normal active regions,
3300 similar to those created by shift-selection (see Selection changes
3301 above). In previous Emacs versions, these regions were delineated by
3302 `mouse-drag-overlay'; that variable has been removed.
3304 ** The fourth argument of `filter-buffer-substring' has been removed.
3305 If you want to remove text properties from the final result, simply
3306 pass the result through substring-no-properties.
3308 ** cl.el no longer provides `cl-19'.
3310 ** The following obsolete functions and aliases have been removed
3311 (the appropriate new function is given in parentheses; "not needed"
3312 means you can just remove all calls to the function in question):
3314 *** `comint-kill-output' (`comint-delete-output')
3315 *** `decompose-composite-char' (`char-to-string')
3316 *** `outline-visible' (`outline-invisible-p')
3317 *** `internal-find-face' (`facep')
3318 *** `internal-get-face' (`facep and check-face')
3319 *** `frame-update-faces' (not needed)
3320 *** `frame-update-face-colors' (`frame-set-background-mode')
3321 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3322 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3323 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3324 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3325 *** `x-make-font-unbold' (`make-face-unbold')
3326 *** `x-make-font-unitalic' (`make-face-unitalic')
3327 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3328 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3329 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3330 *** `char-bytes' (== 1)
3331 *** `isearch-return-char' (`isearch-printing-char')
3332 *** `make-local-hook' (not needed)
3333 *** `set-screen-height' (`set-frame-height')
3334 *** `set-screen-width' (`set-frame-width')
3336 ** The following obsolete variables and varaliases have been removed
3337 (the appropriate new variable is given in parentheses):
3339 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3340 *** `vc-header-alist' (`vc-BACKEND-header')
3341 *** `directory-sep-char' (== ?/)
3342 *** `font-lock-defaults-alist' (`font-lock-defaults')
3343 *** `e' (`float-e').
3345 ** The following obsolete files were removed:
3346 sc.el, x-menu.el, rnews.el, rnewspost.el
3348 ** The format of the finder-inf.el file has changed, since the Finder
3349 mechanism is now based on the package system. The variable
3350 `finder-package-info' is replaced by `package--builtins' and
3351 `finder-keywords-hash'.
3353 ** When generating autoloads, `update-directory-autoloads' no longer
3354 assumes every inspected file is in your `load-path'. It instead
3355 generates relative names according to the current `load-path'.
3358 * Lisp Changes in Emacs 24.1
3360 ** Code can now use lexical scoping by default instead of dynamic scoping.
3361 The `lexical-binding' variable enables lexical scoping for local
3362 variables. It is typically set via a file-local variable in the first
3363 line of the file, in which case it applies to all the code in that
3366 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3367 binding instead of the old dynamic binding mode.
3369 *** Lexically scoped interpreted functions are represented with a new form
3370 of function value which looks like (closure ENV ARGS &rest BODY).
3372 *** New macro `letrec' to define recursive local functions.
3374 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3375 So do `defcustom' and other forms that call `defvar' as a subroutine.
3377 *** New function `special-variable-p' to check whether a variable is
3378 declared as dynamically bound.
3380 *** The form ((lambda ...) ...) is deprecated.
3382 ** An Emacs Lisp testing tool is now included.
3383 Emacs Lisp developers can use this tool to write automated tests for
3384 their code. See the ERT info manual for details.
3386 ** Changes for bidirectional display and editing
3388 *** New function `current-bidi-paragraph-direction'.
3389 This returns the base direction of the paragraph at point.
3391 *** New function `bidi-string-mark-left-to-right'.
3392 Given a string containing characters from right-to-left scripts, this
3393 function returns another string which can be safely inserted into a
3394 buffer, such that any following text will be always displayed to the
3395 right of that string. (This works by appending an invisible Unicode
3396 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3398 This is useful when the buffer has overall left-to-right paragraph
3399 direction and you need to insert a string whose contents are not known
3400 in advance, without disrupting the layout of the line.
3404 *** Window tree functions are accessible in Elisp.
3405 Functions are provided to return the parent, siblings or child windows
3406 of any window including internal windows (windows not associated with a
3407 buffer) in the window tree.
3409 **** New function `window-valid-p' gives non-nil for live and internal
3412 **** Window manipulation can deal with internal windows.
3413 Many window handling functions like `split-window', `delete-window', or
3414 `delete-other-windows' as well as the window resizing functions can now
3415 act on any window including internal ones.
3417 *** window-total-height/-width vs window-body-height/-width.
3418 The function `window-height' has been renamed to `window-total-height'
3419 and `window-width' has been renamed to `window-body-width'. The old
3420 names are provided as aliases. Two new functions `window-total-width'
3421 and `window-body-height' are provided.
3423 *** Window parameters specific to window handling functions.
3424 For each window you can specify a parameter to override the default
3425 behavior of a number of functions like `split-window', `delete-window'
3426 and `delete-other-windows'. The variable `ignore-window-parameters'
3427 allows to ignore processing such parameters.
3429 *** New semantics of third argument of `split-window'.
3430 The third argument of `split-window' has been renamed to SIDE and can be
3431 set to any of the values 'below, 'right, 'above, or 'left to make the
3432 new window appear on the corresponding side of the window that shall be
3433 split. Any other value of SIDE will cause `split-window' to split the
3434 window into two side-by-side windows as before.
3436 *** Window resizing functions.
3437 A new standard function for resizing windows called `window-resize' has
3438 been introduced. This and all other functions for resizing windows no
3439 longer delete any windows when they become too small.
3441 *** Deleting the selected window now selects the most recently selected
3442 live window on that frame instead.
3444 *** `adjust-window-trailing-edge' adjustments.
3445 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3446 is able to resize other windows if a window adjacent to the trailing
3447 edge cannot be shrunk any more. This makes its behavior more similar to
3448 that of Emacs 21 without compromising, however, its inability to delete
3449 windows which was introduced in Emacs 22.
3451 *** Window-local buffer lists.
3452 Windows now have local buffer lists. This means that removing a buffer
3453 from display in a window will preferably show the buffer previously
3454 shown in that window with its previous window-start and window-point
3455 positions. This also means that the same buffer may be automatically
3456 shown twice even if it already appears in another window.
3458 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3459 which if non-nil requires the buffer to be displayed in the currently
3460 selected window, signaling an error otherwise. If nil, another window
3461 can be used, e.g. if the selected one is strongly dedicated.
3463 *** `split-window-vertically' and `split-window-horizontally' renamed
3464 to `split-window-below' and `split-window-right' respectively.
3465 The old names are kept as aliases.
3469 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3470 named ACTION, and takes a display action of the same form as
3471 `display-buffer-base-action' (see Changes, above). A non-nil,
3472 non-list value is treated specially, as the old meaning.
3474 **** New variable `display-buffer-overriding-action'.
3476 **** The procedure of `display-buffer' etc. to choose a window is
3477 determined by combining `display-buffer-overriding-action',
3478 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3479 and `display-buffer-fallback-action'. The second and fourth of these
3480 are user-customizable variables.
3482 See the docstring of `display-buffer' for details.
3484 *** New functions `window-state-get' and `window-state-put'.
3485 These functions allow to save and restore the state of an arbitrary
3486 frame or window as an Elisp object.
3490 *** New variable `completion-extra-properties' used to specify extra
3491 properties of the current completion:
3492 - :annotate-function, same as the old completion-annotate-function.
3493 - :exit-function, function to call after completion took place.
3495 *** Functions on `completion-at-point-functions' can return any of the
3496 properties valid for `completion-extra-properties'.
3498 *** `completion-annotate-function' is obsolete.
3500 *** New `metadata' method for completion tables. The metadata thus returned
3501 can specify various details of the data returned by `all-completions':
3502 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3503 used to select a style in completion-category-overrides.
3504 - `annotation-function' to add annotations in *Completions*.
3505 - `display-sort-function' to specify how to sort entries in *Completions*.
3506 - `cycle-sort-function' to specify how to sort entries when cycling.
3508 *** `minibuffer-local-filename-must-match-map' is not used any more.
3509 Instead, the bindings in `minibuffer-local-filename-completion-map'
3510 are combined with `minibuffer-local-must-match-map'.
3512 *** New variable `completing-read-function' allows overriding the
3513 behavior of `completing-read'.
3515 ** `glyphless-char-display' can now distinguish between graphical and
3516 text terminal display, via a char-table entry that is a cons cell.
3518 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3519 Instead, the offending function is removed.
3523 *** New function `run-hook-wrapped' for running an abnormal hook by
3524 passing the hook functions as arguments to a "wrapping" function.
3525 Like `run-hook-with-args-until-success', it stops at the first
3526 non-nil return value.
3528 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3529 set of "wrapping" filters, similar to around advice.
3530 (A version of this macro was actually added in Emacs 23.2 but was not
3531 advertised at the time.)
3535 *** New macro `condition-case-unless-debug' (this was actually added in
3536 Emacs 23.1 as condition-case-no-debug, but not advertised)
3538 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3540 *** Variable `stack-trace-on-error' removed.
3542 *** The debugger can now "continue" from an error, which means it will
3543 jump to the error handler as if the debugger had not been invoked
3544 instead of jumping all the way to the top-level.
3546 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3547 This can be useful when `inhibit-quit' is set.
3549 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3550 named Emacs server instances.
3552 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3553 to redirect STDOUT to a file.
3555 ** The function `format-time-string' now supports the %N directive,
3556 for higher-resolution time stamps.
3558 ** New input reading functions
3560 *** New function `read-char-choice' reads a restricted set of
3561 characters, discarding any inputs not inside the set.
3563 *** The command `read-color' now requires a match for a color name
3564 or RGB triplet, instead of signaling an error if the user provides
3567 **** `facemenu-read-color' is now an alias for `read-color'.
3569 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3570 The variable is now used to load all kind of supported dynamic libraries,
3571 not just image libraries. The previous name is still available as an
3574 ** Syntax parsing changes
3576 *** New variable `syntax-propertize-function'.
3577 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3578 This allows syntax-table properties to be set independently from font-lock:
3579 just call syntax-propertize to make sure the text is propertized.
3580 Together with this new variable come a new hook
3581 syntax-propertize-extend-region-functions, as well as two helper functions:
3582 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3583 as-is; and syntax-propertize-rules which provides a new way to specify
3586 *** Syntax tables support a new "comment style c" additionally to style b.
3588 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3590 ** frame-local variables cannot be let-bound any more.
3592 ** Major and minor mode changes
3594 *** `set-auto-mode' now respects mode: local variables at the end of files,
3595 as well as those in the -*- line.
3597 *** `prog-mode' is a new major mode from which programming modes
3600 **** `prog-mode-hook' can be used to enable features for programming
3601 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3602 on-the-fly spell checking for comments and strings.
3604 *** New hook `change-major-mode-after-body-hook', run by
3605 `run-mode-hooks' just before any other mode hooks.
3607 *** Enabled globalized minor modes can be disabled in specific major modes.
3608 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3609 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3611 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3613 ** File-handling changes
3615 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3616 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3617 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3618 argument is supplied (see Trash changes, above).
3620 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3622 ** Tool-bars can display separators.
3623 Tool-bar separators are handled like menu separators in menu-bar maps,
3624 i.e. via menu entries of the form `(menu-item "--")'.
3628 *** Animated images support (currently animated gifs only).
3630 **** `image-animated-p' returns non-nil if an image can be animated.
3632 **** `image-animate' animates a supplied image spec.
3634 **** `image-animate-timer' returns the timer object for an image that
3637 *** `image-extension-data' has been renamed to `image-metadata'.
3638 The old name is an obsolete alias to the new one.
3640 *** Image mode can view any image type that ImageMagick supports.
3641 This requires Emacs to be built with ImageMagick support.
3643 **** New function `imagemagick-types', defined if ImageMagick support
3644 is enabled, returns a list of image file extensions that your
3645 ImageMagick installation supports.
3647 **** New function `imagemagick-register-types' enables ImageMagick
3648 image types in Image mode and in `create-image' and other helper
3651 **** New option `imagemagick-types-inhibit' excludes certain
3652 ImageMagick image types from `imagemagick-register-types'.
3654 **** With ImageMagick support, there are extra Image mode commands to
3655 resize and rotate images: `image-transform-fit-to-height',
3656 `image-transform-fit-to-width', `image-transform-set-rotation', and
3657 `image-transform-set-scale'.
3659 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3660 passes it to the mail user agent function. This argument specifies an
3661 action for returning to the caller after finishing with the mail. For
3662 example, this is used by Rmail to optionally delete a mail window.
3664 ** XML and HTML parsing
3665 If Emacs is compiled with libxml2 support, there are two new
3666 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3667 and `libxml-parse-xml-region' (which parses XML). Both return an
3668 Emacs Lisp parse tree.
3670 ** Networking and encryption changes
3672 *** `open-network-stream' can now be used to open an encrypted stream.
3673 It now accepts an optional `:type' parameter for initiating a TLS
3674 connection, directly or via STARTTLS. To do STARTTLS, additional
3675 parameters (`:end-of-command', `:success', `:capabilities-command')
3676 must also be supplied.
3678 *** New library gnutls.el.
3679 The new function `gnutls-available-p' returns non-nil if Emacs is
3680 built with GnuTLS support. The main entry points are
3681 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3682 these functions through `open-network-stream', because that can
3683 upgrade connections through STARTTLS opportunistically or use plain
3684 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3687 *** New primitive `secure-hash' that supports many secure hash algorithms:
3688 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3689 sha1.el has been removed. The `sha1' feature is provided by default.
3693 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3695 ** Progress reporters can now "spin".
3696 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3697 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3698 time you call `progress-reporter-update' on that progress reporter,
3699 with a nil or omitted VALUE argument, the reporter message is
3700 displayed with a "spinning bar".
3702 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3703 being reverted, even if the buffer has a local `revert-buffer-function'.
3705 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3706 If delayed-warnings-list is non-nil, the command loop calls
3707 `delayed-warnings-hook' after `post-command-hook'. At present, this
3708 is only used by Emacs on some platforms to display warnings during
3709 startup, which might otherwise not be noticed. This uses the
3710 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3712 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3714 ** New function `make-composed-keymap' that constructs a new keymap
3715 from multiple input maps. You can use this to make a keymap that
3716 inherits from multiple maps, eg:
3717 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3719 ** New function `string-prefix-p'.
3720 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3722 ** New reader macro ## that stands for the empty symbol.
3723 This means that the empty symbol can now be read back. Also, #: by itself
3724 (when not immediately followed by a possible symbol character) stands for
3725 an empty uninterned symbol.
3727 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3729 ** The following functions and variables are obsolete:
3731 *** `tooltip-use-echo-area' is obsolete.
3732 Rather than setting this to t, disable Tooltip mode instead.
3734 *** buffer-substring-filters is obsolete.
3735 Use `filter-buffer-substring-functions' instead.
3737 *** `byte-compile-disable-print-circle' is obsolete.
3739 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3740 Use `post-command-hook' instead.
3742 *** `font-lock-maximum-size' is obsolete.
3745 * Changes in Emacs 24.1 on Non-Free Operating Systems
3747 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3748 and also when HOME is set to C:\ by default.
3750 ** New configure.bat options
3752 *** --enable-checking builds Emacs with extra runtime checks.
3754 *** --distfiles specifies files to be included in binary distribution.
3756 *** --without-gnutls disables automatic GnuTLS detection.
3758 *** --lib for general library linkage, works with the USER_LIBS build variable.
3760 ** New make target `dist' to create binary distribution for MS Windows.
3762 ** The Lisp function `w32-default-color-map' is now obsolete.
3763 (It is only used internally in the Emacs C code.)
3765 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3766 reappear on mouse-over. (Requires OS X 10.6 or later.)
3768 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3769 other platforms, rather than inserting its contents into the buffer.
3772 ----------------------------------------------------------------------
3773 This file is part of GNU Emacs.
3775 GNU Emacs is free software: you can redistribute it and/or modify
3776 it under the terms of the GNU General Public License as published by
3777 the Free Software Foundation, either version 3 of the License, or
3778 (at your option) any later version.
3780 GNU Emacs is distributed in the hope that it will be useful,
3781 but WITHOUT ANY WARRANTY; without even the implied warranty of
3782 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3783 GNU General Public License for more details.
3785 You should have received a copy of the GNU General Public License
3786 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3791 paragraph-separate: "[
\f]*$"