1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2010-2013 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.
167 ** Frame and window changes
170 *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
171 bound to <f11> and M-<f10>, respectively.
173 *** New command `frameset-to-register' is now bound to `C-x r f', replacing
174 `frame-configuration-to-register'. It offers similar functionality,
175 plus enhancements like the ability to restore deleted frames. The
176 command `frame-configuration-to-register' still exists, but is unbound.
179 *** New hooks `focus-in-hook', `focus-out-hook'.
180 These are normal hooks run when an Emacs frame gains or loses input focus.
183 *** `split-window' is now a non-interactive function, not a command.
184 As a command, it was a special case of `C-x 2' (`split-window-below'),
185 and as such superfluous. After being reimplemented in Lisp, its
186 interactive form was mistakenly retained.
189 *** New option `scroll-bar-adjust-thumb-portion'.
190 Available only on X, this option allows to control over-scrolling
191 using the scroll bar (i.e. dragging the thumb down even when the end
192 of the buffer is visible).
194 ** Lisp evaluation changes
196 *** `eval-defun' on an already defined defcustom calls the :set function,
199 *** A zero prefix arg of `eval-last-sexp' (`C-x C-e'),
200 `eval-expression' (`M-:') and `eval-print-last-sexp' (`C-j') inserts
201 a list with no limit on its length and level (by using nil values of
202 `print-length' and `print-level'), and inserts additional formats for
203 integers (octal, hexadecimal, and character).
206 ** `write-region-inhibit-fsync' now defaults to t in batch mode.
209 ** `cache-long-line-scans' has been renamed to `cache-long-scans'
210 because it affects caching of paragraph scanning results as well.
213 ** The option `set-mark-default-inactive' has been deleted.
214 This unfinished feature was introduced by accident in Emacs 23.1;
215 simply disabling Transient Mark mode does the same thing.
217 ** The default value of `comment-use-global-state' is changed to t,
218 and this variable has been marked obsolete.
222 *** `read-regexp-defaults-function' defines a function to read regexps,
223 used by commands like `rgrep', `lgrep' `occur', `highlight-regexp',
224 etc. You can customize this to specify a function that provides a
225 default value from the regexp last history element, or from the symbol
228 *** `load-prefer-newer', affects how the `load' function chooses the
229 file to load. If this is non-nil, then when both .el and .elc
230 versions of a file exist, and the caller did not explicitly specify
231 which one to load, then the newer file is loaded. The default, nil,
232 means to always load the .elc file.
235 * Editing Changes in Emacs 24.4
237 ** Indentation changes
240 *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
241 When invoked without a prefix argument, it now activates a transient
242 mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
243 the text indentation in the region. Typing any other key resumes
244 normal editing behavior.
246 *** `electric-indent-mode' is enabled by default.
248 *** `tab-stop-list' is now implicitly extended to infinity by repeating
249 the last step. Its default value is changed to nil which means a tab
250 stop every `tab-width' columns.
254 *** New command `cycle-spacing' cycles between spacing conventions:
255 having just one space, no spaces, or reverting to the original
256 spacing. Like `just-one-space', it can handle or ignore newlines and
257 leave different number of spaces.
259 *** `fill-single-char-nobreak-p' prevents fill from breaking a line after
260 a 1-letter word, which is an error according to Polish and
261 Czech typography rules. To globally enable this feature, evaluate:
263 (add-hook 'fill-nobreak-predicate 'fill-single-char-nobreak-p)
266 ** Uniquify is enabled by default with `post-forward-angle-brackets' style.
268 ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
269 Most commands are still unaware of it, but kill/yank do work on the rectangle.
272 ** New option `visual-order-cursor-movement'.
273 If this is non-nil, cursor motion with arrow keys will follow the
274 visual order of characters on the screen: <left> always moves to the
275 left, <right> always moves to the right, disregarding the surrounding
276 bidirectional context.
280 *** All register commands can now show help with preview.
283 *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
286 *** New command `C-x r f' (`frameset-to-register').
287 See Changes in Emacs 24.4, above.
289 ** New command `delete-duplicate-lines'.
290 When its arg ADJACENT is non-nil (when called interactively with C-u
291 C-u) it works like the utility `uniq'. Otherwise by default it
292 deletes duplicate lines everywhere in the region without regard to
293 adjacency. When its arg KEEP-BLANKS is non-nil (when called
294 interactively with C-u C-u C-u), duplicate blank lines are preserved.
297 * Changes in Specialized Modes and Packages in Emacs 24.4
299 ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
301 ~/.emacs.d/timelog replaces ~/.timelog
302 ~/.emacs.d/vip replaces ~/.vip
303 ~/.emacs.d/viper replaces ~/.viper
304 ~/.emacs.d/ido.last replaces ~/.ido.last
305 ~/.emacs.d/kkcrc replaces ~/.kkcrc
306 ~/.emacs.d/quickurls replaces ~/.quickurls
307 ~/.emacs.d/idlwave replaces ~/.idlwave
308 ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
309 ~/.emacs.d/places replaces ~/.emacs-places
310 ~/.emacs.d/shadows replaces ~/.shadows
311 ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
312 ~/.emacs.d/strokes replaces ~/.strokes
313 ~/.emacs.d/notes replaces ~/.notes
314 ~/.emacs.d/type-break replaces ~/.type-break
315 Also the following files used by the now obsolete otodo-mode.el:
316 ~/.emacs.d/todo-do replaces ~/.todo-do
317 ~/.emacs.d/todo-done replaces ~/.todo-done
318 ~/.emacs.d/todo-top replaces ~/.todo-top
320 ** Backtrace and debugger
322 *** The Lisp debugger's `e' command now includes the lexical environment
323 when evaluating the code in the context at point. Hence, it now lets
324 you access lexical variables.
327 *** New command `v' (`debugger-toggle-locals') displays local vars.
329 *** New minor mode `jit-lock-debug-mode' lets you use the debuggers on
330 code run via JIT Lock.
335 *** Battery information via the BSD `apm' utility is now supported.
339 *** `M-s a C-o' shows lines matching a regexp in marked buffers using Occur.
341 ** Calendar and Diary
344 *** New faces `calendar-weekday-header', `calendar-weekend-header',
345 and `calendar-month-header'.
347 *** New option `calendar-day-header-array'.
350 *** New variable `diary-from-outlook-function', used by the command
351 `diary-from-outlook'.
353 *** The variable `calendar-font-lock-keywords' is obsolete.
357 *** Calc by default now uses the Gregorian calendar for all dates, and
358 uses January 1, 1 AD as its day number 1. Previously Calc used the
359 Julian calendar for dates before September 14, 1752, and it used
360 December 31, 1 BC as its day number 1; the new scheme is more
361 consistent with Calendar's calendrical system and day numbering.
363 *** The new variable `calc-gregorian-switch' lets you configure the
364 date when Calc switches from the Julian to the Gregorian calendar.
365 Nil, the default value, means to always use the Gregorian calendar.
366 The value (YEAR MONTH DAY) means to start using the Gregorian calendar
369 *** Support for ISO 8601 dates.
375 **** The cpp-root project now supports executing a compile command.
376 It can be set through the new :compile-command slot or the
377 buffer-local variable `compile-command'.
379 **** Better selection of include directories for the 'linux' project.
380 Include directories now support out-of-tree build directories and
381 target architecture auto-detection.
385 **** Improved detection of used namespaces in current scope in C++.
387 **** Parsing of default values for variables and function arguments in C/C++.
388 They are also displayed by the summarize feature in the modeline.
390 **** Improved parsing of function pointers in C/C++.
391 This also includes parsing of function pointers as function arguments.
393 **** Parsing of C/C++ preprocessor macros which open new scope.
394 For example, this enables parsing of macros which open new namespaces.
396 **** Support for 'this' pointer in inline member functions in C++.
400 *** New macro `cl-tagbody'.
403 *** letf is now just an alias for cl-letf.
407 *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
408 Hence, you can now enable it independently from `transient-mark-mode',
409 `delete-selection-mode', and `shift-select-mode'.
411 *** `cua-highlight-region-shift-only' is now obsolete.
412 You can disable `transient-mark-mode' to get the same result.
414 *** CUA's rectangles can now be used via `cua-rectangle-mark-mode'.
418 *** Support for completion, ElDoc, and Flycheck has been added.
420 *** The current CFEngine syntax is parsed from "cf-promises -s json".
421 There is a fallback syntax available if you don't have cf-promises or
422 if it doesn't support that option.
424 ** Delete Selection mode can now be used without `transient-mark-mode'.
428 *** `desktop-auto-save-timeout' defines the number of seconds idle time
429 before auto-save of the desktop.
431 *** `desktop-restore-frames', enabled by default, allows saving and
432 restoring the frame/window configuration (frameset). Additional options
433 `desktop-restore-in-current-display', `desktop-restore-reuses-frames'
434 and `desktop-restore-forces-onscreen' offer further customization.
438 *** New minor mode `dired-hide-details-mode' hides details.
440 ** Eldoc Mode works properly in the minibuffer.
442 ** Electric Pair mode
443 *** New `electric-pair-preserve-balance' enabled by default.
445 Pairing/skipping only kicks in when that help the balance of
446 parentheses and quotes, i.e. the buffer should end up at least as
449 You can further control this behaviour by adjusting the predicates
450 stored in `electric-pair-inhibit-predicate' and
451 `electric-pair-skip-self'.
453 *** New `electric-pair-delete-adjacent-pairs' enabled by default.
455 In `electric-pair-mode', the commands `backward-delete-char' and
456 `backward-delete-char-untabify' are now bound to electric variants
457 that delete the closer when invoked between adjacent pairs.
459 *** New `electric-pair-open-newline-between-pairs' enabled by default.
461 In `electric-pair-mode', inserting a newline between adjacent pairs
462 opens an extra newline after point, which is indented if
463 `electric-indent-mode' is also set.
465 *** New `electric-pair-skip-whitespace' enabled by default.
467 Controls if skipping over closing delimiters should jump over any
468 whitespace slack. Setting it to `chomp' makes it delete this
469 whitespace. See also the variable
470 `electric-pair-skip-whitespace-chars'.
472 *** New variables control the pairing in strings and comments.
474 You can customize `electric-pair-text-pairs' and
475 `electric-pair-text-syntax-table' to tweak pairing behaviour inside
476 strings and comments.
480 *** New option `epa-mail-aliases'.
482 You can set this to a list of alias expansions for keys to use
483 in `epa-mail-encrypt'.
485 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
486 that means: when one of the recipients of the message being encrypted
487 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
489 If one element of the variable's value is ("foo@bar.com"),
490 that means: when one of the recipients of the message being encrypted
491 is `foo@bar.com', ignore that name as regards encryption.
492 This is useful to avoid a query when you have no key for that name.
496 *** New option `erc-accidental-paste-threshold-seconds'.
497 If set to a number, this can be used to avoid accidentally paste large
498 amounts of data into the ERC input.
503 *** New macro `skip-unless' allows skipping ERT tests.
504 See the ERT manual for details.
509 *** `eshell' now supports visual subcommands and options
510 Eshell has been able to handle "visual" commands (interactive,
511 non-line oriented commands such as top that require display
512 capabilities not provided by eshell) by running them in an Emacs
513 terminal emulator. See `eshell-visual-commands'.
515 This feature has been extended to subcommands and options that make a
516 usually line-oriented command a visual command. Typical examples are
517 "git log" and "git <command> --help" which display their output in a
518 pager by default. See `eshell-visual-subcommands' and
519 `eshell-visual-options'.
522 *** Added Eshell-Tramp module
523 External su and sudo commands are now the default; the internal,
524 Tramp-using variants can still be used by enabling the eshell-tramp
529 *** New option `f90-smart-end-names'.
531 ** Icomplete is a bit more like Ido.
533 *** key bindings to navigate through and select the completions.
535 *** The icomplete-separator is customizable, and its default has changed.
537 *** Removed icomplete-show-key-bindings.
539 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
540 (setq icomplete-with-completion-tables '(internal-complete-buffer))
541 will revert to the old behavior.
545 *** Ido has a manual now.
547 *** `ido-use-virtual-buffers' takes a new value 'auto.
549 *** `ido-decorations' has been slightly extended to give a bit more control.
554 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
555 visit the next image file and the previous image file in the same
556 directory, respectively.
558 *** New commands to show specific frames of multi-frame images.
559 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
560 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
562 *** New commands to speed up, slow down, or reverse animation.
564 *** The command `image-mode-fit-frame' deletes other windows.
565 When toggling, it restores the frame's previous window configuration.
566 It also has an optional frame argument, which can be used by Lisp
567 callers to fit the image to a frame other than the selected frame.
571 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
572 will cycle through faces in `hi-lock-face-defaults' without prompting.
575 *** New global command `M-s h .' (`highlight-symbol-at-point')
576 highlights the symbol found near point without prompting,
577 using the next face automatically.
581 *** New option `imenu-generic-skip-comments-and-strings'.
585 *** New face `info-index-match' is used to highlight matches in index
586 entries displayed by `Info-index-next', `Info-virtual-index' and
591 *** Better indentation of multiple-variable declarations.
592 If declaration spans several lines, variables on the following lines
593 are lined up to the first one.
595 *** We now recognize and better indent continuations in array
598 *** New option `js-switch-indent-offset`.
600 ** MH-E has been updated to MH-E version 8.5.
601 See MH-E-NEWS for details.
605 *** Font locking for texinfo comments and new keywords
606 *** Completion in Octave file buffers
608 *** Jump to definition
609 *** Documentation lookup/search
610 *** Code cleanup and various bug fixes
612 ** OPascal mode is the new name for Delphi mode.
614 *** All delphi-* variables and functions have been renamed to opascal-*.
615 *** `delphi-newline-always-indents' is not supported any more.
616 Use `electric-indent-mode' instead.
617 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
621 *** The format of `archive-contents' files, generated by package
622 repositories, has changed to allow a new (fifth) element in the data
623 vectors, containing an associative list with extra properties.
625 *** `describe-package' buffer uses the `:url' extra property to
626 display a `Homepage' header, if it's present.
628 *** In the buffer produced by `describe-package', there are now buttons
629 listing the keywords related to that package. You can click on them
630 to see other packages related to any given keyword.
632 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
633 the packages by a keyword.
637 *** `prolog-use-smie' has been removed, along with the non-SMIE
642 *** The new command `remember-notes' creates a buffer which is saved
645 You may think of it as a *scratch* buffer whose content is preserved.
646 In fact, it was designed as a replacement for *scratch* buffer and can
647 be used that way by setting `initial-buffer-choice' to
648 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
649 Without the second change, *scratch* buffer will still be there for
650 notes that do not need to be preserved.
652 *** The Remember package can now store notes in separates files.
653 You can use the new function `remember-store-in-files' within the
654 `remember-handler-functions' option.
656 See `remember-data-directory' and `remember-directory-file-name-format'
657 for new options related to this function.
661 *** Customize `rmail-mbox-format' to influence some minor aspects of
662 how Rmail displays non-MIME messages.
665 *** The `unrmail' command now converts from BABYL to mboxrd format,
666 rather than mboxo. Customize `unrmail-mbox-format' to change this.
670 *** New option `ruby-encoding-magic-comment-style'.
672 *** New option `ruby-custom-encoding-magic-comment-template'.
676 *** Improved syntax highlighting and indentation.
678 *** Add more Ruby file types to `auto-mode-alist'.
680 *** New option `ruby-align-to-stmt-keywords'.
682 *** New `electric-indent-mode' integration.
684 ** Search and Replace
687 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
688 starts a symbol (identifier) incremental search forward with the
689 symbol found near point added to the search string initially.
691 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
692 and adds it to the search string.
694 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
695 between nil and the value of the option `search-invisible' (or `open'
698 *** `query-replace' skips invisible text when `search-invisible' is nil,
699 and opens overlays with hidden text when `search-invisible' is `open'.
702 *** A negative prefix arg of replacement commands replaces backward.
703 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
704 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
707 *** By default, prefix arguments do not now terminate Isearch mode.
708 Set `isearch-allow-prefix' to nil to restore old behavior.
710 *** More Isearch commands accept prefix arguments, namely
711 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
714 *** Word search now matches whitespace at the beginning/end
715 of the search string if it contains leading/trailing whitespace.
716 In an incremental word search or when using a non-nil LAX argument
717 of `word-search-regexp', the lax matching can also match part of
718 the first word (in addition to the lax matching of the last word).
719 The same rules are now applied to the symbol search with the difference
720 that it matches symbols, and non-symbol characters between symbols.
725 *** New command `ses-rename-cell' allows assigning names to SES cells.
729 *** `explicit-bash-args' now always defaults to use --noediting.
730 During initialization, Emacs no longer expends a process to decide
731 whether it is safe to use Bash's --noediting option. These days
732 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
736 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
737 You can pick the name of the function and the variables with `C-x 4 a'.
739 *** The SMIE indentation engine is now used by default.
741 ** SMIE indentation can be customized via `smie-config'.
742 The customization can be guessed by Emacs by providing a sample indented
743 file and letting SMIE learn from it.
747 *** New option `term-suppress-hard-newline'.
749 ** Todo mode has been rewritten and enhanced.
750 New features include:
751 - support for multiple todo files and archive files of done items;
752 - renaming, reordering, moving, merging, and deleting categories;
753 - sortable tabular summaries of categories and the types of items they contain;
754 - cross-category lists of items filtered by specific criteria;
755 - more fine-grained interaction with the Emacs diary, by being able to decide
756 for each todo item whether it appears in the Fancy Diary display;
757 - highly flexible new item insertion and item editing;
758 - moving items between categories, storing done items in their category or in
759 archive files, undoing or unarchiving done items;
760 - reprioritizing items by inputting a numerical priority;
761 - extensive customizability of operation and display, including numerous faces.
762 The Todo mode user manual describes all commands and most user options.
763 To support some of these features, a new file format is used, which is
764 incompatible with the old format; however, you can convert old todo and done
765 item files to the new format on initializing the first new todo file, or at any
766 later time with the provided conversion command. The old version of
767 todo-mode.el has been made obsolete and renamed otodo-mode.el.
769 ** trace-function was largely rewritten.
770 New features include:
771 - no prompting for the destination buffer, unless a prefix-arg was used.
772 - additionally to prompting for a destination buffer, when a prefix-arg is
773 used, the user can enter a "context", i.e. Lisp expression whose value at the
774 time the function is entered/exited will be printed along with the function
775 name and arguments. Useful to trace the value of (current-buffer) or
776 (point) when the function is invoked.
780 *** The experimental url syntax for remote file names is withdrawn.
783 *** New connection method "adb", which allows to access Android
784 devices by the Android Debug Bridge. The variable `tramp-adb-program'
785 can be used to adapt the path of the "adb" program, if needed.
787 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
788 "scpc" and "rsyncc" are discontinued. The ssh option
789 "ControlMaster=auto" is set automatically in all ssh-based methods,
793 *** Handlers for `file-acl' and `set-file-acl' for remote machines
794 which support POSIX ACLs.
797 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
798 for remote machines which support filesystem notifications.
800 ** VC and related modes
803 *** In VC directory mode, `D' displays diffs between VC-controlled
804 whole tree revisions.
807 *** In VC directory mode, `L' lists the change log for the current VC
808 controlled tree in a window.
811 *** In VC directory mode, `I' shows a log of changes that will be
812 received with a pull operation.
815 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
816 under current version control system. When called with a prefix
817 argument, you can remove a file from the ignored file list.
820 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
821 because it is moved to vc-cvs.el.
825 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
827 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
831 *** The commands `woman-default-faces' and `woman-monochrome-faces'
832 are obsolete. Customize the `woman-*' faces instead.
834 ** Obsolete packages:
836 *** Iswitchb is made obsolete by icomplete-mode.
838 *** longlines.el is obsolete; use visual-line-mode instead.
843 *** terminal.el is obsolete; use term.el instead.
845 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
850 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
853 *** The Info-edit command is obsolete. Editing Info nodes by hand
854 has not been relevant for some time.
857 * New Modes and Packages in Emacs 24.4
859 ** New package `eww' is a built-in web browser.
860 It is only available if Emacs is compiled with libxml2 support.
862 ** New minor mode `superword-mode', defined in subword.el
863 `superword-mode' overrides the default word motion commands to treat
864 symbol_words as a single word, similar to what `subword-mode' does and
865 using the same internal functions.
867 ** New package nadvice.el offers lighter-weight advice facilities.
869 - add-function/remove-function which can be used to add/remove code on any
870 function-carrying place, such as process-filters or `<foo>-function' hooks.
871 - advice-add/advice-remove to add/remove a piece of advice on a named function,
872 much like `defadvice' does.
874 ** New package frameset.el.
875 It provides a set of operations to save a frameset (the state of all
876 or a subset of the existing frames and windows, somewhat similar to a
877 frame configuration), both in-session and persistently, and restore it
878 at some point in the future.
881 ** New package filenotify.el provides an interface for file system
882 notifications. It requires that Emacs be compiled with one of the
883 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
886 * Incompatible Lisp Changes in Emacs 24.4
889 ** `kill-region' lost its `yank-handler' optional argument.
892 ** `(input-pending-p)' no longer runs other timers which are ready to
893 run. The new optional CHECK-TIMERS param allows for the prior behavior.
895 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
898 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
899 Some languages match those as »...« and others as «...» so better stay neutral.
902 ** In compiled Lisp files, the header no longer includes a timestamp.
905 ** The default file coding for Emacs Lisp files is now utf-8.
906 (See `file-coding-system-alist'.) In most cases, this change is
907 transparent, but files that contain unusual characters without
908 specifying an explicit coding system may fail to load with obscure
909 errors. You should either convert them to utf-8 or add an explicit
913 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
914 It used to disable the minor mode, major mode, and text-property keymaps,
915 whereas now it simply has higher precedence.
917 ** Default process filters and sentinels are not nil any more.
918 Instead they default to a function which does what the nil value used to do.
921 ** `read-event' does not return decoded chars in ttys any more.
922 As was the case in Emacs 22 and before, the decoding of terminal
923 input, according to `keyboard-coding-system', is not performed in
924 `read-event' any more. But unlike in Emacs 22, this decoding is still
925 done before input-decode-map, function-key-map, etc.
928 ** Removed `inhibit-local-menu-bar-menus'.
931 ** Frame-local variables that affect redisplay do not work any more.
932 More specifically, the redisplay does not bother to check for a frame-local
933 value when looking up variables.
936 ** nil and "unbound" are indistinguishable in `symbol-function'.
937 `symbol-function' does not signal a `void-function' error any more.
938 To determine if a symbol's function definition is void, use `fboundp'.
941 ** `defadvice' does not honor the `freeze' flag and cannot advise
942 special-forms any more.
945 ** `dolist' no longer binds VAR while evaluating the RESULT form,
946 when lexical binding is enabled. Previously, VAR was bound to nil,
947 which often led to spurious unused-variable warnings.
949 ** The return value of `backup-buffer' has changed.
950 The second argument is no longer an SELinux context, instead it is an
951 alist of extended attributes as returned by the new function
952 `file-extended-attributes'. The attributes can be applied to another
953 file using `set-file-extended-attributes'.
956 ** `visited-file-modtime' now returns -1 for nonexistent files.
957 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
958 in the presence of files with negative time stamps.
961 ** The cars of the elements in `interpreter-mode-alist' are now
962 treated as regexps rather than literal strings.
965 * Lisp Changes in Emacs 24.4
968 ** The second argument of `eval' can now specify a lexical environment.
971 ** New functions `special-form-p' and `macrop'.
973 ** New macro `define-alternatives' can be used to define generic commands.
974 Generic commands are interactive functions whose implementation can be
975 selected among several alternatives, as a matter of user preference.
977 ** The `defalias-fset-function' property lets you catch `defalias'
978 calls, and redirect them to your own function, instead of `fset'.
980 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
981 text-property on the first char.
984 ** New variable `enable-dir-local-variables'.
985 Directory-local variables are ignored if this is nil. This may be
986 useful for modes that want to ignore directory-locals while still
987 respecting file-local variables.
990 ** New function `get-pos-property'.
992 ** Completion changes
994 *** The separator for `completing-read-multiple' can now be a regexp.
995 The default separator has been changed to allow surrounding spaces
998 *** The `common-substring' arg of `display-completion-list' is obsolete.
999 Either use `completion-all-completions', which returns highlighted
1000 strings (including for partial or substring completion), or call
1001 `completion-hilit-commonality' to add the highlight.
1006 *** Functions to pop up menus and dialogs now work on all terminals,
1007 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1008 `message-box', `yes-or-no-p', etc.
1010 The function `display-popup-menus-p' will now return non-nil for a
1011 display or frame whenever a mouse is supported on that display or
1014 *** New hook `tty-setup-hook'.
1016 ** New hook `pre-redisplay-function'.
1019 ** New bool-vector set operation functions:
1020 *** `bool-vector-exclusive-or'
1021 *** `bool-vector-union'
1022 *** `bool-vector-intersection'
1023 *** `bool-vector-set-difference'
1024 *** `bool-vector-not'
1025 *** `bool-vector-subsetp'
1026 *** `bool-vector-count-consecutive'
1027 *** `bool-vector-count-population'
1030 ** Comparison functions =, <, >, <=, >= now take many arguments.
1032 ** Error-handling changes
1035 *** New function `define-error'.
1037 *** `with-demoted-errors' takes an additional argument `format'.
1040 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
1042 ** New library subr-x.el for misc helper functions
1044 *** `hash-table-keys'
1046 *** `hash-table-values'
1048 *** `string-blank-p`
1049 *** `string-empty-p`
1051 *** `string-reverse`
1052 *** `string-trim-left'
1053 *** `string-trim-right'
1055 *** `string-remove-prefix'
1056 *** `string-remove-suffix'
1058 ** Obsoleted functions:
1061 *** `lisp-complete-symbol'
1062 *** `field-complete'
1063 *** `minibuffer-completion-contents'
1064 *** `isearch-nonincremental-exit-minibuffer'
1065 *** `isearch-filter-visible'
1066 *** `generic-make-keywords-list'
1067 *** `get-upcase-table' (use `case-table-get-table' instead).
1069 ** `with-wrapper-hook' is obsoleted by `add-function'.
1070 The few hooks that used with-wrapper-hook are replaced as follows:
1071 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1072 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1073 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1075 ** `byte-compile-interactive-only-functions' is now obsolete.
1076 It has been replaced by the symbol property 'interactive-only.
1079 ** `split-string' now takes an optional argument TRIM.
1080 The value, if non-nil, is a regexp that specifies what to trim from
1081 the start and end of each substring.
1083 ** New function `string-suffix-p'.
1085 ** File-handling changes
1088 *** Support for filesystem notifications.
1089 Emacs now supports notifications of filesystem changes, such as
1090 creation, modification, and deletion of files. This requires the
1091 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1092 MS-Windows systems, this is supported for Windows XP and newer
1096 *** The 9th element returned by `file-attributes' is now unspecified.
1097 Formerly, it was t if the file's gid would change if file were deleted
1098 and recreated. This value has been inaccurate for years on many
1099 platforms, and nobody seems to have noticed or cared.
1102 *** The 6th argument to `copy-file' has been renamed to
1103 PRESERVE-EXTENDED-ATTRIBUTES as it now handles both SELinux context
1107 *** The function `file-ownership-preserved-p' now has an optional
1108 argument GROUP which causes it check for file group too. This can be
1109 used in place of the 9th element of `file-attributes'.
1111 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1112 argument, with the same interpretation as the returned value of
1113 `visited-file-modtime'.
1115 ** Changes in autorevert.el
1118 *** If Emacs is compiled with file notification support, notifications
1119 are used instead of checking the time stamp of the files. You can
1120 disable this by setting the user option `auto-revert-use-notify' to
1121 nil. Alternatively, a regular expression of directories to be
1122 excluded from file notifications can be specified by
1123 `auto-revert-notify-exclude-dir-regexp'.
1126 *** The new user option `auto-revert-remote-files' enables reversion
1127 of remote files when set to non-nil.
1131 *** The function `face-spec-set' is now like `setq' for face specs.
1132 Its third arg now accepts values specifying a face spec type (defface,
1133 custom, or override spec), and the relevant spec is set accordingly.
1136 *** New function `add-face-text-property', which can be used to
1137 conveniently prepend/append new face properties.
1139 *** Face specs set via Custom themes now replace the `defface' spec
1140 rather than inheriting from it (as do face specs set via Customize).
1142 *** New face characteristic (supports :underline (:style wave))
1143 specifies whether or not the terminal can display a wavy line.
1146 *** New face spec attribute :distant-foreground
1147 specifies foreground to use if background color is near the foreground
1148 color that would otherwise have been used.
1153 *** `image-animated-p' is now `image-multi-frame-p'.
1154 It returns non-nil for any image that contains multiple frames,
1155 whether or not it specifies a frame delay.
1158 *** New variable `image-default-frame-delay' gives the frame delay for
1159 animated images which do not specify a frame delay.
1162 *** New functions `image-current-frame' and `image-show-frame' for getting
1163 and setting the current frame of a multi-frame image.
1167 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1168 **** object-name -> eieio-object-name
1169 **** object-class -> eieio-object-class
1170 **** object-class-fast -> eieio--object-class
1171 **** object-name-string -> eieio-object-name-string
1172 **** object-num-slots -> eieio--object-num-slots
1173 **** object-set-name-string -> eieio-object-set-name-string
1174 **** class-parent -> eieio-class-parent
1175 **** class-parents -> eieio-class-parents
1176 **** class-children -> eieio-class-children
1177 **** class-num-slots -> eieio--class-num-slots
1178 **** class-precedence-list -> eieio-class-precedence-list
1179 **** All generated class-* and object-* field accessors are now
1180 prefixed with `eieio-' as well.
1182 *** Obsoleted functions:
1184 **** class-direct-subclasses
1185 **** class-direct-superclasses
1187 ** Changes in encoding and decoding of text
1190 *** New coding-system `prefer-utf-8'.
1191 This is like `undecided' but prefers UTF-8 on decoding if the text to
1192 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1193 any non-ASCII characters are automatically encoded as UTF-8.
1196 *** New attributes of coding-systems whose type is `undecided'.
1197 Two new attributes, `:inhibit-null-byte-detection' and
1198 `:inhibit-iso-escape-detection', determine how to detect encoding of
1199 text that includes null bytes and ISO-2022 escape sequences,
1200 respectively. Each of these attributes can be either nil, zero, or
1201 t. If it is t, decoding text ignores null bytes and, respectively,
1202 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1203 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1204 text is encoded in one of the ISO-2022 encodings, such as
1205 iso-2022-7bit. If the value is zero, Emacs consults the variables
1206 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1208 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1209 UTF-8 encoding and decoding, whenever possible.
1211 These attributes are only meaningful for coding-systems of type
1212 `undecided'. (The type of a coding-system is determined by its
1213 `:coding-type' attribute and can be accessed by calling the
1214 `coding-system-type' function.)
1216 ** `time-to-seconds' is not obsolete any more.
1218 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1219 When you edit DIR/FILE, Emacs normally creates a symbolic link
1220 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1221 is being edited. Formerly, if there was already a non-symlink file
1222 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1223 through DIR/.#FILE.9. These fallbacks have been removed, so that
1224 Emacs now no longer locks DIR/FILE in that case.
1226 On file systems that do not support symbolic links, the lock is now a
1227 regular file with contents being what would have been in the symlink.
1230 ** New functions `group-gid' and `group-real-gid'.
1232 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1235 *** The package descriptor and name of global variables, constants,
1236 and functions should be separated by two hyphens if the symbol is not
1237 meant to be used by other packages.
1240 * Changes in Emacs 24.4 on Non-Free Operating Systems
1242 ** The procedure for building Emacs on MS-Windows has changed.
1243 It is now built by running the same configure script as on all other
1244 platforms. This requires the MSYS environment and MinGW development
1245 tools. See the updated instructions in nt/INSTALL for details.
1247 Using the Posix configure script and Makefile's also means a change in
1248 the directory structure of the Emacs installation on Windows. It is
1249 now the same as on GNU and Unix systems. In particular, the auxiliary
1250 programs, such as cmdproxy.exe and hexl.exe, are in
1251 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1252 version), version-independent site-lisp is in share/emacs/site-lisp,
1253 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1254 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1255 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1256 directories and will find the files in there automatically; there's no
1257 need to set any variables due to this change.)
1260 ** Emacs on Windows 2000 and later can now access files and directories
1261 whose names cannot be encoded in the current system codepage.
1263 The new variable `w32-unicode-filenames' controls this feature: if it
1264 is t, Emacs uses Unicode APIs to pass file names to system calls,
1265 which lifts the limitation of file names to the current locale.
1268 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1269 The backtrace is written to the 'emacs_backtrace.txt' file in the
1270 directory where Emacs was running.
1273 ** The variable `buffer-file-type' is no longer supported.
1274 Setting it has no effect, and %t in the mode-line format is ignored.
1275 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1276 modifying it has no effect.
1279 ** Lock files now work on MS-Windows.
1280 This allows to avoid losing your edits if the same file is being
1281 edited in another Emacs session or by another user. See the node
1282 "Interlocking" in the Emacs User Manual for the details. To disable
1283 file locking, customize `create-lockfiles' to nil.
1285 ** Improved fullscreen support on Mac OS X.
1286 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1287 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1288 native is the default.
1290 ** OSX >= 10.7 can use sRGB colorspace.
1291 Customize `ns-use-srgb-colorspace' to change style. t is the default.
1292 Note: This does not apply to images.
1295 * Installation Changes in Emacs 24.3
1297 ** The default X toolkit is now Gtk+ version 3.
1298 If you don't pass `--with-x-toolkit' to configure, or if you use
1299 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1300 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1301 You can explicitly require a specific version by passing
1302 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1304 ** New configure option `--enable-link-time-optimization', to utilize
1305 an appropriate feature provided by GCC since version 4.5.0.
1307 ** New configure option `--without-all' to disable most of the optional
1308 features (image support, etc.) that are normally enabled by default.
1310 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1311 Emacs). If building with GCC, this enables compile-time checks that
1312 warn/give errors about possibly-questionable C code. On a recent GNU
1313 system there should be no warnings; on older and on non-GNU systems
1314 the results may be useful to developers.
1316 ** The configure option `--enable-use-lisp-union-type' has been
1317 renamed to `--enable-check-lisp-object-type', as the resulting
1318 Lisp_Object type no longer uses a union to implement the compile time
1319 check that this option enables.
1321 ** The configure option `--disable-maintainer-mode' has been removed,
1322 as it was confusingly-named and rarely useful.
1324 ** The configure options `--program-prefix', `--program-suffix', and
1325 `--program-transform-name' apply to more than just the installed
1326 binaries. Now they also affect the man pages, icons, and the
1327 etc/emacs.desktop file; but not the info pages, since this would break
1328 links between the various manuals.
1330 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1331 overwriting "emacs" in the installation bin/ directory with a link
1334 ** Emacs uses libtinfo in preference to libncurses, if available.
1336 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1337 /usr/pkg/lib to the linker search path. You must add them yourself if
1340 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1341 (from the bin and libexec directories, respectively). The former is
1342 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1345 * Startup Changes in Emacs 24.3
1347 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1348 lisp/ directory. There should not be any there anyway. If you have
1349 been adding them there, put them somewhere else; e.g., site-lisp.
1351 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1354 * Changes in Emacs 24.3
1358 *** `C-h f' (`describe-function') can now perform autoloading.
1359 When this command is called for an autoloaded function whose docstring
1360 contains a key substitution construct, that function's library is
1361 automatically loaded, so that the documentation can be shown
1362 correctly. To disable this, set `help-enable-auto-load' to nil.
1364 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1365 even after their associated libraries have been loaded (and the
1366 autoloads have been redefined as functions).
1370 *** Images displayed via ImageMagick now support transparency and the
1371 :background image specification property.
1373 *** When available, ImageMagick support is automatically enabled.
1374 It is no longer necessary to call `imagemagick-register-types'
1375 explicitly to install ImageMagick image types; that function is called
1376 automatically at startup, or when customizing an imagemagick- option.
1378 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1379 ImageMagick to view images. (You must call `imagemagick-register-types'
1380 afterwards if you do not use customize to change this.)
1382 *** The new variable `imagemagick-enabled-types' also affects which
1383 ImageMagick types are treated as images. The function
1384 `imagemagick-filter-types' returns the list of types that will be
1387 *** ImageMagick images now support the :max-width and :max-height
1390 *** Some data types aren't auto-detected by ImageMagick. Adding
1391 :format to `create-image' may help if the content type is in the
1392 new variable `image-format-suffixes'.
1396 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1397 next and previous path separator, respectively.
1399 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1400 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1401 non-nil before enabling the mode.
1405 *** New option `mode-line-default-help-echo' specifies the help text
1406 (shown in a tooltip or in the echo area) for any part of the mode line
1407 that does not have its own specialized help text.
1409 *** You can now click mouse-3 in the coding system indicator to invoke
1410 `set-buffer-file-coding-system'.
1412 ** Server and client
1414 *** emacsclient now obeys string values for `initial-buffer-choice',
1415 if it is told to open a new frame without specifying any file to visit
1416 or expression to evaluate.
1418 *** New option `server-auth-key' specifies a shared server key.
1420 ** Emacs now generates backtraces on fatal errors.
1421 On encountering a fatal error, Emacs now outputs a textual description
1422 of the fatal signal, and a short backtrace on platforms like glibc
1423 that support backtraces.
1425 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1426 This minor mode replaces `toggle-read-only', which is now obsolete.
1428 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1429 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1430 respectively, without exiting from the prompt.
1432 ** In the Package Menu, newly-available packages are listed as "new",
1433 and sorted above the other "available" packages by default.
1435 ** If your Emacs was built from a bzr checkout, the new variable
1436 `emacs-bzr-version' contains information about the bzr revision used.
1438 ** New option `create-lockfiles' specifies usage of lockfiles.
1439 It defaults to t. Changing it to nil inhibits the creation of lock
1440 files (use this with caution).
1442 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1443 variables on remote hosts.
1445 ** The entry for PCL-CVS has been removed from the Tools menu.
1446 The PCL-CVS commands are still available via the keyboard.
1448 ** Using "unibyte: t" in Lisp source files is obsolete.
1449 Use "coding: raw-text" instead.
1451 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1452 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1453 The previous binding, introduced in Emacs 24.1, was a mistake, because
1454 `C-c LETTER' bindings are reserved for user customizations.
1456 ** Internationalization
1458 *** New language environment: Persian.
1460 *** New input method `vietnamese-vni'.
1462 ** Nextstep (GNUstep / Mac OS X) port
1464 *** Support for fullscreen and the frame parameter fullscreen.
1466 *** A file dialog is used for open/save operations initiated from the
1470 * Editing Changes in Emacs 24.3
1472 ** Search and Replace
1474 *** Non-regexp Isearch now performs "lax" space matching.
1475 Each sequence of spaces in the supplied search string may match any
1476 sequence of one or more whitespace characters, as specified by the
1477 variable `search-whitespace-regexp'. (This variable is also used by a
1478 similar existing feature for regexp Isearch.)
1480 *** New Isearch command `M-s SPC' toggles lax space matching.
1481 This applies to both ordinary and regexp Isearch.
1483 *** New option `replace-lax-whitespace'.
1484 If non-nil, `query-replace' uses flexible whitespace matching too.
1487 *** Global `M-s _' starts a symbol (identifier) incremental search,
1488 and `M-s _' in Isearch toggles symbol search mode.
1489 `M-s c' in Isearch toggles search case-sensitivity.
1491 ** Navigation commands
1493 *** New binding `M-g c' for `goto-char'.
1495 *** New binding `M-g TAB' for `move-to-column'.
1497 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1498 interactively with no prefix arg. Previously, it moved to column 1.
1500 ** New option `yank-handled-properties' allows processing of text
1501 properties on yanked text, in ways that are more general than just
1502 removing them (as is done by `yank-excluded-properties').
1504 ** New option `delete-trailing-lines' specifies whether
1505 M-x delete-trailing-whitespace should delete trailing lines at the end
1506 of the buffer. It defaults to t.
1508 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1510 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1511 `ucs-insert' is now an obsolete alias for `insert-char'.
1513 ** The `z' key no longer has a binding in most special modes.
1514 It used to be bound to `kill-this-buffer', but `z' is too easy to
1517 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1518 It copies the region-rectangle as the last rectangle kill.
1522 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1524 *** New option `register-separator' specifies the register containing
1525 the text to put between collected texts for use with
1526 M-x append-to-register and M-x prepend-to-register.
1529 * Changes in Specialized Modes and Packages in Emacs 24.3
1531 ** Common Lisp emulation (CL)
1533 *** CL's main entry is now (require 'cl-lib).
1534 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1535 i.e., all its definitions have the "cl-" prefix (and internal definitions
1536 use the "cl--" prefix).
1538 If `cl' provided a feature under the name `foo', then `cl-lib'
1539 provides it under the name `cl-foo' instead; with the exceptions of the
1540 few `cl' definitions that had to use `foo*' to avoid conflicts with
1541 pre-existing Elisp entities. These have been renamed to `cl-foo'
1542 rather than `cl-foo*'.
1544 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1545 provide the old, non-prefixed names. Some exceptions are listed below:
1547 *** `cl-flet' is not like `flet' (which is deprecated).
1548 Instead it obeys the behavior of Common-Lisp's `flet'.
1549 In particular, in cl-flet function definitions are lexically scoped,
1550 whereas in flet the scoping is dynamic.
1552 *** `cl-labels' is slightly different from `labels'.
1553 The difference is that it relies on the `lexical-binding' machinery
1554 (as opposed to the `lexical-let' machinery used previously) to capture
1555 definitions in closures, so such closures will only work if `lexical-binding'
1558 *** `cl-letf' is not exactly like `letf'.
1559 The only difference is in details that relate to some deprecated usage
1560 of `symbol-function' in place forms.
1562 *** `progv' was rewritten to use the `let' machinery.
1563 A side effect is that variables without corresponding values are bound
1564 to nil rather than being made unbound.
1566 *** The following methods of extending `setf' are obsolete
1567 (use features from gv.el instead):
1568 `define-modify-macro' (use `gv-letplace')
1569 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1570 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1571 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1575 *** Changes are now highlighted using the same color scheme as in
1576 modern VCSes. Deletions are displayed in red (new faces
1577 `diff-refine-removed' and `smerge-refined-removed', and new definition
1578 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1579 and `smerge-refined-added', and new definition of `diff-added').
1581 *** The variable `diff-use-changed-face' defines whether to use the
1582 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1583 changes in context diffs.
1585 *** The new command `diff-delete-trailing-whitespace' removes trailing
1586 whitespace introduced by a diff.
1588 ** Ediff now uses the same color scheme as Diff mode.
1592 A new version of python.el, which provides several new features, including:
1593 per-buffer shells, better indentation, Python 3 support, and improved
1594 shell-interaction compatible with iPython (and virtually any other
1597 *** Some user options have been replaced/renamed, including (old -> new):
1598 **** python-indent -> python-indent-offset
1599 **** python-guess-indent -> python-indent-guess-indent-offset
1600 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1601 **** python-use-skeletons -> python-skeleton-autoinsert
1603 *** Some user options have been removed, including:
1605 **** `python-indent-string-contents': Strings are never indented.
1607 **** `python-honour-comment-indentation':
1608 Comments are always considered as indentation markers.
1610 **** `python-continuation-offset': Indentation is automatically
1611 calculated in a pep8 compliant way depending on the context.
1613 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1614 Have no direct mapping as the shell interaction is completely different.
1616 **** `python-python-command', `python-jython-command':
1617 Replaced by `python-shell-interpreter'.
1619 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1620 `python-pdbtrack-minor-mode-string', `python-source-modes':
1623 *** Some commands have been replaced (old -> new):
1624 **** python-insert-class -> python-skeleton-class
1625 **** python-insert-def -> python-skeleton-def
1626 **** python-insert-for -> python-skeleton-for
1627 **** python-insert-if -> python-skeleton-if
1628 **** python-insert-try/except -> python-skeleton-try
1629 **** python-insert-try/finally -> python-skeleton-try
1630 **** python-insert-while -> python-skeleton-while
1631 **** python-find-function -> python-nav-jump-to-defun
1632 **** python-next-statement -> python-nav-forward-sentence
1633 **** python-previous-statement -> python-nav-backward-sentence
1634 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1635 **** python-end-of-defun-function -> python-nav-end-of-defun
1636 **** python-send-buffer -> python-shell-send-buffer
1637 **** python-send-defun -> python-shell-send-defun
1638 **** python-send-region -> python-shell-send-region
1639 **** python-send-region-and-go -> emulate with python-shell-send-region
1640 and python-shell-switch-to-shell
1641 **** python-send-string -> python-shell-send-string
1642 **** python-switch-to-python -> python-shell-switch-to-shell
1643 **** python-describe-symbol -> python-eldoc-at-point
1647 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1649 *** The D-Bus object manager interface is implemented.
1651 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1652 if their value does not fit into Emacs's integer range.
1654 *** The function `dbus-call-method' is now non-blocking.
1655 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1657 *** Signals can also be sent as unicast messages.
1659 *** The argument list of `dbus-register-signal' has been extended,
1660 according to the new match rule types of D-Bus.
1662 *** `dbus-init-bus' supports private connections.
1664 *** There is a new function `dbus-setenv'.
1666 ** `desktop-path' no longer includes the "." directory.
1667 Desktop files are now located in ~/.emacs.d by default.
1671 *** `dired-do-async-shell-command' executes each file sequentially
1672 if the command ends in `;' (when operating on multiple files).
1673 Otherwise, it executes the command on each file in parallel.
1675 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1676 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1679 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1680 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1681 mark/unmark/flag all files in the active region.
1683 *** The minibuffer default for `=' (`dired-diff') has changed.
1684 It is now the backup file for the file at point, if one exists.
1685 In Transient Mark mode the default is the file at the active mark.
1687 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1688 The global binding for `M-=', `count-words-region' is in effect.
1692 *** New module "notifications", which can send a notification when you
1693 receive a private message or your nickname is mentioned.
1695 *** ERC will look up server/channel names via auth-source and use any
1698 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1699 only applies to messages sent by lurkers.
1701 ** reStructuredText mode
1703 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1704 fontification, comment handling, and customization have all been revised
1707 *** Support for `imenu' and `which-function-mode'.
1709 *** The reStructuredText syntax is more closely covered.
1710 Sphinx support has been improved.
1712 *** `rst-insert-list' inserts new list or continues existing lists.
1714 *** A negative prefix argument always works for `rst-adjust'.
1716 *** The window configuration is reset after displaying a TOC.
1718 *** The constant `rst-version' describes the rst.el package version.
1722 *** Support for percent literals and recognition of regular expressions
1723 in method calls without parentheses with more methods, including Cucumber
1726 *** Improved syntax highlighting and indentation.
1728 *** New command `ruby-toggle-block', bound to `C-c {'.
1730 *** Some non-standard keybindings/commands have been removed:
1732 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1734 **** `ruby-mark-defun'; use `mark-defun'.
1736 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1737 appropriate settings for the variables `beginning-of-defun-function'
1738 and `end-of-defun-function'.
1740 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1741 `reindent-then-newline-and-indent' and `newline' have been removed.
1743 ** Shell Script mode
1745 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1747 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1749 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1753 *** The free software compiler GHDL is supported (and now the default).
1755 *** Support for the VHDL-AMS packages has been added/updated.
1757 *** Updated to the 2002 revision of the VHDL standard.
1759 *** Accepts \r and \f as whitespace.
1763 *** The faces used by Apropos are now directly customizable.
1764 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1765 see the `apropos' Custom group for details.
1767 *** The old options whose values specified faces to use have been removed
1768 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1772 *** This package has been rewritten to use Tabulated List mode.
1774 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1775 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1779 *** Algebraic simplification mode is now the default.
1780 To restrict to the limited simplifications given by the former
1781 default simplification mode, use `m I'.
1785 *** You can customize the header text that appears above each calendar month.
1786 See the variable `calendar-month-header'.
1788 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1790 *** The calendars produced by cal-html include holidays.
1791 Customize `cal-html-holidays' to change this.
1795 *** The major modes from the parser generators "Bovine" and "Wisent"
1796 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1797 are in `auto-mode-alist', and the corresponding manuals are included.
1801 **** Menu support for the "Configuration" feature. This allows users to
1802 choose the active configuration (such as debug or install) from the menu.
1804 **** New command `ede-set' to interactively set project-local variables.
1806 **** Support for compiling, debugging, and running in "generic" projects.
1808 **** Autoconf editing support for M4 macros with complex arguments.
1810 **** Compilation support for the "linux" project type.
1812 **** "simple" projects have been removed; use "generic" projects instead.
1816 **** Support for parsing #include statements inside a namespace in C/C++.
1818 **** Improved support for 'extern "C"' declarations in C/C++.
1820 **** The ability to ignore more common special C/C++ preprocessor symbols,
1821 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1822 If available, include cdefs.h as an additional source of preprocessor symbols.
1824 **** Improved C/C++ function pointer parsing.
1826 **** In Python, support for converting imports to include file names.
1828 **** Ability to dynamically determine the Python load path.
1830 **** Support for the Python 'WITH' and 'AT' keywords.
1832 **** Improved tooltip completion.
1836 **** The SRecode manual is now included.
1838 **** Tag generation supports constructor/destructor settings and system
1839 include differentiation.
1841 **** Addition of 'Framework' support: Frameworks are specified when a
1842 particular kind of library (such as Android) is needed in a common language
1845 **** Support for nested templates and let variables override based on priority.
1847 **** Support for merging tables from multiple related modes, such as
1848 default -> c++ -> arduino.
1850 ** Compile has a new option `compilation-always-kill'.
1854 *** `custom-reset-button-menu' now defaults to t.
1856 *** Non-option variables are never matched in `customize-apropos' and
1857 `customize-apropos-options' (i.e., the prefix argument does nothing for
1858 these commands now).
1862 *** The variables `term-default-fg-color' and `term-default-bg-color'
1863 are now deprecated in favor of the customizable face `term'.
1865 *** You can customize how to display ANSI terminal colors and styles
1866 by customizing the corresponding `term-color-<COLOR>',
1867 `term-color-underline' and `term-color-bold' faces.
1871 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1873 *** Remote processes are now also supported on remote MS-Windows hosts.
1877 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1878 Previously, this slot stored semicolon-separated attribute-value pairs
1879 appended to some imap URLs, but this is not compatible with RFC 3986.
1880 So now the `filename' slot stores the entire path and query components,
1881 and the `attributes' slot is always nil.
1883 *** New function `url-encode-url' for encoding a URI string.
1884 The `url-retrieve' function now uses this to encode its URL argument,
1885 in case that is not properly encoded.
1887 *** New command `url-cookie-list' displays all the current cookies, and
1888 allows deleting selected cookies.
1890 ** notifications.el supports now version 1.2 of the Notifications API.
1891 The function `notifications-get-capabilities' returns the supported
1894 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1895 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1896 `flymake-warning-bitmap'.
1898 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1899 specifying URL types that should be converted to remote file names at
1900 the FFAP prompt. The default is now '("ftp").
1902 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1903 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1905 ** New option `mouse-avoidance-banish-position' specifies where the
1906 `banish' mouse avoidance setting moves the mouse.
1908 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1909 closing brackets to be aligned with the line of the opening bracket.
1911 ** In Proced mode, new command `proced-renice' renices marked processes.
1913 ** New option `async-shell-command-buffer' specifies the buffer to use
1914 for a new asynchronous `shell-command' when the default output buffer
1915 `*Async Shell Command*' is already in use.
1917 ** SQL mode has a new option `sql-db2-escape-newlines'.
1918 If non-nil, newlines sent to the command interpreter will be escaped
1919 by a backslash. The default does not escape the newlines and assumes
1920 that the sql statement will be terminated by a semicolon.
1922 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1923 (and modes that derive from it), sorts the column at point, or the Nth
1924 column if a numeric prefix argument is given.
1926 ** `which-func-modes' now defaults to t, so Which Function mode, when
1927 enabled, applies to all applicable major modes.
1929 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1932 ** Follow mode no longer works by using advice.
1933 The option `follow-intercept-processes' has been removed.
1935 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1937 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1938 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1939 *** semantic-change-hooks -> semantic-change-functions
1940 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1941 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1942 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1943 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1944 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1945 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1946 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1947 *** rcirc-activity-hooks -> rcirc-activity-functions
1948 *** rcirc-print-hooks -> rcirc-print-functions
1949 *** dbus-event-error-hooks -> dbus-event-error-functions
1950 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1951 *** checkdoc-style-hooks -> checkdoc-style-functions
1952 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1953 *** archive-extract-hooks -> archive-extract-hook
1954 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1955 *** hfy-post-html-hooks -> hfy-post-html-hook
1956 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1957 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1958 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1959 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1961 ** Obsolete packages
1964 In most cases, assoc+member+push+delq work just as well.
1965 And in any case it's just a terrible package: ugly semantics, terrible
1966 inefficiency, and not namespace-clean.
1975 * Incompatible Lisp Changes in Emacs 24.3
1977 ** Docstrings starting with `*' no longer indicate user options.
1978 Only variables defined using `defcustom' are considered user options.
1979 The function `user-variable-p' is now an obsolete alias for
1980 `custom-variable-p'.
1982 ** The return values of `defalias', `defun' and `defmacro' have changed,
1983 and are now undefined. For backwards compatibility, `defun' and
1984 `defmacro' currently return the name of the newly defined
1985 function/macro, but this should not be relied upon.
1987 ** `random' by default now returns a different random sequence in
1988 every Emacs run. Use `(random S)', where S is a string, to set the
1989 random seed to a value based on S, in order to get a repeatable
1990 sequence in later calls.
1992 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1993 that substring is inserted literally even if the LITERAL arg is
1994 non-nil, instead of causing an error to be signaled.
1996 ** `select-window' now always makes the window's buffer current.
1997 It does so even if the window was selected before.
1999 ** The function `x-select-font' can return a font spec, instead of a
2000 font name as a string. Whether it returns a font spec or a font name
2001 depends on the graphical library.
2003 ** `face-spec-set' no longer sets frame-specific attributes when the
2004 third argument is a frame (that usage was obsolete since Emacs 22.2).
2006 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
2008 ** The CL package's `get-setf-method' function no longer exists.
2009 Generalized variables are now part of core Emacs Lisp, and implemented
2010 differently to the way cl.el used to do it. It is not possible to
2011 define a compatible replacement for `get-setf-method'. See the file
2012 gv.el for internal details of the new implementation.
2014 ** The arguments of `dbus-register-signal' are no longer just strings,
2015 but keywords or keyword-string pairs. The old argument list will
2016 still be supported for Emacs 24.x.
2018 ** Miscellaneous name changes
2019 Some Lisp symbols have been renamed to correct their spelling,
2020 or to be more consistent with standard Emacs terminology.
2022 *** Renamed functions
2023 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
2024 **** inactivate-input-method -> deactivate-input-method
2025 **** quail-inactivate -> quail-deactivate
2026 **** robin-inactivate -> robin-deactivate
2027 **** viper-inactivate-input-method -> viper-deactivate-input-method
2028 **** viper-inactivate-input-method-action ->
2029 viper-deactivate-input-method-action
2030 **** ucs-input-inactivate -> ucs-input-deactivate
2033 The old hooks are still supported for backward compatibility, but they
2034 are deprecated and will be removed eventually.
2035 **** input-method-inactivate-hook -> input-method-deactivate-hook
2036 **** robin-inactivate-hook -> robin-deactivate-hook
2037 **** quail-inactivate-hook -> quail-deactivate-hook
2039 *** Renamed variables
2040 **** follow-deactive-menu -> follow-inactive-menu
2041 **** inactivate-current-input-method-function ->
2042 deactivate-current-input-method-function
2044 ** Some obsolete functions, variables, and faces have been removed:
2045 *** `last-input-char', `last-command-char', `unread-command-char'
2046 *** `facemenu-unlisted-faces'
2047 *** `rmail-decode-mime-charset'
2048 *** `iswitchb-read-buffer'
2049 *** `sc-version', `sc-submit-bug-report'
2050 *** `set-char-table-default'
2051 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2052 *** `compile-internal'
2054 *** `mode-line-inverse-video'
2055 *** `follow-mode-off-hook'
2056 *** `cvs-commit-buffer-require-final-newline'
2057 (use `log-edit-require-final-newline' instead)
2058 *** `cvs-changelog-full-paragraphs'
2059 (use `log-edit-changelog-full-paragraphs' instead)
2060 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2061 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2062 *** `vc-master-templates' (use `vc-handled-backends' instead)
2063 *** `vc-checkout-carefully'
2066 * Lisp Changes in Emacs 24.3
2068 ** CL-style generalized variables are now in core Elisp.
2069 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2070 You can define your own generalized variables using `gv-define-simple-setter',
2071 `gv-define-setter', etc.
2073 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2074 This can significantly speed up execution of non-byte-compiled code,
2075 but can also bump into previously unnoticed cyclic dependencies.
2076 These are generally harmless: they will simply cause the macro calls
2077 to be left for later expansion (as before), but will result in a
2078 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2079 You may wish to restructure your code so this does not happen.
2081 ** New sampling-based Elisp profiler.
2082 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2083 When finished, use M-x profiler-stop. The sampling rate can be based on
2084 CPU time or memory allocations.
2086 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2087 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2089 ** New macros `setq-local' and `defvar-local'.
2091 ** Face underlining can now use a wave.
2093 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2094 of `read-regexp' accepts a string ending with a colon and space, and its
2095 second argument DEFAULTS can be a list of strings accessible via `M-n'
2096 in the minibuffer ahead of other hard-coded useful regexp-related values.
2097 More commands use `read-regexp' now to read their regexp arguments.
2101 *** New function `completion-table-with-quoting' to handle completion
2102 in the presence of quoting, such as file completion in shell buffers.
2104 *** New function `completion-table-subvert' to use an existing completion
2105 table, but with a different prefix.
2109 *** New error type and new function `user-error'.
2110 These do not trigger the debugger.
2112 *** New option `debugger-bury-or-kill', saying what to do with the
2113 debugger buffer when exiting debug.
2115 *** Set `debug-on-message' to enter the debugger when a certain
2116 message is displayed in the echo area. This can be useful when trying
2117 to work out which code is doing something.
2119 *** New var `inhibit-debugger', automatically set to prevent accidental
2120 recursive invocations.
2124 *** New command `fit-frame-to-buffer' adjusts the frame height to
2127 *** The command `fit-window-to-buffer' can adjust the frame height
2128 if the new option `fit-frame-to-buffer' is non-nil.
2130 *** New macro `with-temp-buffer-window', similar to
2131 `with-output-to-temp-buffer'.
2133 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2136 *** New option `switch-to-buffer-preserve-window-point' to restore a
2137 window's point when switching buffers.
2139 *** New display action function `display-buffer-no-window' to not
2140 display the buffer in a window.
2142 *** New display action alist entry `allow-no-window' to indicate the
2143 caller of `display-buffer' is ready to handle the case of not
2144 displaying the buffer in a window.
2146 *** New display action alist entries `window-height' and `window-width'
2147 specify the size of new windows created by `display-buffer'.
2149 *** New display action alist entry `pop-up-frame-parameters', if
2150 non-nil, specifies frame parameters to give any newly-created frame.
2152 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2153 tells display action functions to avoid changing which frame is
2156 *** New display action alist entry `previous-window', if non-nil,
2157 specifies window to reuse in `display-buffer-in-previous-window'.
2159 *** New display action functions `display-buffer-below-selected',
2160 and `display-buffer-in-previous-window'.
2162 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2163 now accept a third argument to avoid choosing the selected window.
2165 *** Additional values recognized for option `window-combination-limit'.
2167 *** The following variables are obsolete, as they can be replaced by
2168 appropriate entries in the `display-buffer-alist' function introduced
2170 **** `dired-shrink-to-fit'
2171 **** `display-buffer-reuse-frames'
2172 **** `display-buffer-function'
2173 **** `special-display-buffer-names'
2174 **** `special-display-frame-alist'
2175 **** `special-display-function'
2176 **** `special-display-regexps'
2180 *** `current-time-string' no longer requires that its argument's year
2181 must be in the range 1000..9999. It now works with any year supported
2182 by the underlying C implementation.
2184 *** `current-time' now returns extended-format time stamps
2185 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2186 PSEC is typically a multiple of 1000 on current machines. Other
2187 functions that use this format, such as `file-attributes' and
2188 `format-time-string', have been changed accordingly. Old-format time
2189 stamps are still accepted.
2191 *** The format of timers in `timer-list' and `timer-idle-list' is now
2192 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2193 The PSECS slot is new, and uses picosecond resolution. It can be
2194 accessed via the new `timer--psecs' accessor.
2196 *** Last-modified time stamps in undo lists now are of the form
2197 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2201 *** Improved security when handling persistent objects:
2203 **** `eieio-persistent-read' now features optional arguments for specifying
2204 the class to load, as well as a flag stating whether subclasses are allowed;
2205 if provided, other classes will be rejected by the reader. For
2206 compatibility with existing code, if the class is omitted only a
2209 **** New specialized reader for pulling in classes and signaling errors
2210 without evaluation of suspicious code.
2212 **** All slots that contain objects must have a :type. Slots with lists
2213 of objects must use a new type predicate for a list of an object type.
2215 *** Support for `find-function' and similar utilities, through the addition
2216 of filename support to generated symbols.
2218 ** Floating point functions now always return special values like NaN,
2219 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2220 Previously, they returned NaNs on some platforms but signaled errors
2221 on others. The affected functions are acos, asin, tan, exp, expt,
2222 log, log10, sqrt, and mod.
2224 ** New fringe bitmap `exclamation-mark'.
2226 ** Miscellaneous changes to special forms and macros
2228 *** `defun' and `defmacro' are now macros rather than special forms.
2230 *** `kbd' is now a function rather than a macro.
2232 ** Miscellaneous new functions
2234 *** `set-transient-map' sets up a temporary keymap, active for one key
2235 (and optionally more). This keymap takes precedence over other maps.
2237 *** `autoloadp' tests if its argument is an autoloaded object.
2239 *** `autoload-do-load' performs the autoloading operation.
2241 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2243 *** `file-name-base' returns a file name sans directory and extension.
2245 *** `function-get' fetches a function property, following aliases.
2247 *** `posnp' tests if an object is a `posn'.
2249 *** `system-users' returns the user names on the system.
2251 *** `system-groups' returns the group names on the system.
2253 *** `tty-top-frame' returns the topmost frame of a text terminal.
2255 ** The following functions and variables are obsolete:
2256 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2257 *** `buffer-has-markers-at'
2258 *** `macro-declaration-function' (use `macro-declarations-alist')
2259 *** `window-system-version' (provides no useful information)
2260 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2261 *** `query-replace-interactive'
2262 *** `font-list-limit' (has had no effect since Emacs < 23)
2265 * Changes in Emacs 24.3 on Non-Free Operating Systems
2267 ** Cygwin builds can use the native MS Windows user interface.
2268 Pass `--with-w32' to configure. The default remains the X11 interface.
2270 ** Two new functions are available in Cygwin builds:
2271 `cygwin-convert-file-name-from-windows' and
2272 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2273 code to access the Cygwin file-name mapping machinery to convert
2274 between Cygwin and Windows-native file and directory names.
2276 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2277 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2278 `mouse-autoselect-window'.
2280 ** On MS Windows Vista and later Emacs now supports symbolic links.
2282 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2283 support for libxml2, even if its presence is detected.
2285 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2287 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2288 directories to the search path. You must add them yourself if you want them.
2291 * Changes in Emacs 24.2
2293 ** This is mainly a bug-fix release.
2296 * Installation Changes in Emacs 24.1
2298 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2299 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2300 also depend on Gtk+. You can disable them with --without-rsvg and
2303 ** Emacs can be compiled with GnuTLS support.
2304 This happens by default if a suitably recent version of the library is
2305 found at build time. To prevent this, use the configure option
2306 `--without-gnutls'. See below for GnuTLS features.
2308 ** Emacs can be compiled with SELinux support.
2309 This happens by default if a suitably recent version of the library is
2310 found at build time. To prevent this, use the configure option
2311 `--without-selinux'. See below for SELinux features.
2313 ** Emacs can be compiled with ImageMagick support.
2314 This happens by default if a suitably recent version of the library is
2315 found at build time. To prevent this, use the configure option
2316 `--without-imagemagick'. See below for ImageMagick features.
2317 This feature is not available for the Nextstep or MS ports.
2319 ** Emacs can be compiled with libxml2 support.
2320 This happens by default if a suitably recent version of the library is
2321 found at build time. To prevent this, use the configure option
2322 `--without-xml2'. See below for libxml2 features.
2324 ** By default, the installed Info and man pages are compressed.
2325 You can disable this by configuring --without-compress-info.
2327 ** New configure option --with-wide-int.
2328 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2329 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2332 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2333 These provide no new functionality, they just remove the need to edit
2334 lib-src/Makefile by hand in order to use the associated features.
2336 ** New configure option --enable-use-lisp-union-type.
2337 This is only useful for Emacs developers to debug certain types of bugs.
2338 This is not a new feature; only the configure flag is new.
2340 ** The standalone programs digest-doc and sorted-doc are removed.
2341 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2343 ** The standalone program `fakemail' is removed.
2344 If you need it, feedmail.el provides a superset of the functionality.
2347 * Startup Changes in Emacs 24.1
2349 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2350 command line arguments, and the EMACS_UNIBYTE environment variable, no
2351 longer have any effect. (They were declared obsolete in Emacs 23.)
2353 ** New command line option `--no-site-lisp' removes site-lisp directories
2354 from load-path. -Q now implies this. This option does not affect the
2355 EMACSLOADPATH environment variable (and hence has no effect for
2359 * Changes in Emacs 24.1
2363 *** Many packages now use the `completion-at-point' command,
2364 rather than implementing separate completion commands.
2366 *** `completion-at-point' now handles tags and semantic completion.
2368 *** Completion in a non-minibuffer now tries to detect the end of completion
2369 and pops down the *Completions* buffer accordingly.
2371 *** New option `completion-cycle-threshold' allows completion cycling.
2373 *** New option `completion-category-overrides' for overriding the
2374 default completion style in certain circumstances.
2376 *** New completion style `substring'.
2378 *** Completion of buffer names uses `substring' completion by default.
2380 *** The option `widget-complete-field' has been removed.
2384 *** The first time you try sending mail, Emacs asks for a mail method.
2385 This is implemented by a new default for `send-mail-function', which
2386 is `sendmail-query-once'. This offers to use the smtpmail package, or
2387 to use the old defaults relying on external mail facilities
2388 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2389 `mailclient-send-it' on Windows).
2391 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2392 transfers the report to your desktop's preferred mail client, if there
2393 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2396 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2397 and Mail mode changes
2399 ** Emacs server and client changes
2401 *** New option `server-port' specifies the port for TCP Emacs servers.
2403 *** New emacsclient argument -q/--quiet suppresses some status messages.
2405 *** New emacsclient argument --frame-parameters specifies the frame
2406 parameters of any newly-created graphical frame.
2408 *** If emacsclient shuts down due to Emacs signaling an error,
2409 its exit status is 1.
2411 *** New emacsclient argument --parent-id ID.
2412 This opens a client frame in parent X window ID, via XEmbed, similar
2413 to the --parent-id argument to Emacs.
2415 ** Internationalization changes
2417 *** Emacs now supports display and editing of bidirectional text.
2418 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2419 displayed in the correct visual order as expected by users of those
2420 scripts. The display reordering is a "full bidirectionality" class
2421 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2422 with no RTL text should look exactly the same as before.
2424 **** New buffer-local variable `bidi-display-reordering'.
2425 To disable display reordering in a buffer, change this to nil.
2427 **** New buffer-local variable `bidi-paragraph-direction'.
2428 If nil (the default), Emacs determines the base direction of each
2429 paragraph from its text, as specified by the UBA. Setting the value
2430 to `right-to-left' or `left-to-right' forces a base direction on each
2433 Paragraphs with right-to-left base direction are displayed starting at
2434 the right window edge.
2436 *** Enhanced support for characters with no glyphs in available fonts,
2437 or, on text terminals, characters that cannot be encoded by the
2438 terminal coding system. The new option `glyphless-char-display-control'
2439 specifies how to display them: as a hexadecimal code in a box, a thin
2440 1-pixel space, an empty box, etc.
2442 *** New input methods for Farsi and Bulgarian
2443 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2445 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2446 (U+2010 and U+2011).
2448 *** New Hebrew translation of the Emacs Tutorial.
2449 Type `C-u C-h t' to choose it in case your language setup doesn't
2450 automatically select it.
2452 ** An Emacs Lisp package manager is now included.
2453 This is a convenient way to download and install additional packages,
2454 from a package repository at http://elpa.gnu.org.
2456 *** M-x list-packages shows a list of packages, which can be
2457 selected for installation.
2459 *** New command `describe-package', bound to `C-h P'.
2461 *** By default, all installed packages are loaded automatically when
2462 Emacs starts up. To disable this, set `package-enable-at-startup' to
2463 nil. To specify the packages to load, customize `package-load-list'.
2465 ** Custom theme changes
2467 *** New command `M-x customize-themes', which provides a convenient
2468 interface for enabling and disabling Custom themes.
2470 *** New option `custom-theme-load-path' is the load path for themes.
2471 Emacs no longer looks for Custom themes in `load-path'. The default
2472 value of `custom-theme-load-path' says to look for themes in
2473 `custom-theme-directory', followed by a subdirectory of
2474 `data-directory' named "themes/", which contains a small selection of
2475 built-in Custom themes.
2477 *** New option `custom-safe-themes' records known-safe theme files.
2478 If a theme is not in this list, Emacs queries before loading it, and
2479 offers to save the theme to `custom-safe-themes' automatically. By
2480 default, all themes included in Emacs are treated as safe.
2482 ** Improved GTK integration
2484 *** GTK scroll-bars are now placed on the right by default.
2485 The function `set-scroll-bar-mode' can change this.
2487 *** GTK tool bars can have just text, just images or images and text.
2488 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2489 the default is taken from desktop settings.
2491 *** GTK tool bars can be placed on any edge of the frame.
2492 The frame-parameter tool-bar-position controls this. It takes the
2493 values top, left, right or bottom. The Options => Show/Hide menu has
2496 *** The default colors for selected text (the `region' face) are taken
2497 from the GTK theme when Emacs is built with GTK.
2499 *** Emacs uses GTK tooltips by default if built with GTK.
2500 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2502 ** Graphical interface changes
2504 *** On graphical displays, the mode-line no longer ends in dashes.
2505 Also, the first dash (which does not indicate anything) is just
2506 displayed as a space.
2508 *** `menu-bar-select-buffer-function' lets you choose another operation
2509 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2511 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2512 built with Xft. These fonts can be set via X resources, for example:
2513 Emacs.pane.menubar.font: Courier-12
2517 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2518 or if it receives a SIGINT signal in batch mode.
2520 *** `kill-emacs-hook' is now also run in batch mode.
2521 Third-party code which adds to `kill-emacs-hook' should check if they
2522 do the right thing in batch mode.
2524 ** Scrolling changes
2526 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2527 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2528 of buffer at first key-press (instead they move to top/bottom of buffer)
2529 when `scroll-error-top-bottom' is non-nil.
2531 *** New option `scroll-error-top-bottom' (see above).
2533 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2534 scroll a line instead of full screen.
2536 *** New property `scroll-command' should be set on a command's symbol to
2537 define it as a scroll command affected by `scroll-preserve-screen-position'.
2539 *** If you customize `scroll-conservatively' to a value greater than 100,
2540 Emacs will never recenter point in the window when it scrolls due to
2541 cursor motion commands or commands that move point (e.f., `M-g M-g').
2542 Previously, you needed to use `most-positive-fixnum' as the value of
2543 `scroll-conservatively' to achieve the same effect.
2545 *** "Aggressive" scrolling now honors the scroll margins.
2546 If you customize `scroll-up-aggressively' or
2547 `scroll-down-aggressively' and move point off the window, Emacs now
2548 scrolls the window so as to avoid positioning point inside the scroll
2551 ** Basic SELinux support has been added.
2552 This requires Emacs to be linked with libselinux at build time.
2554 *** Emacs preserves the SELinux file context when backing up.
2555 Also, the function `copy-file' has an extra optional argument for
2556 preserving SELinux context, and the return value of `backup-buffer'
2557 now includes the SELinux context.
2559 *** New functions `file-selinux-context' and `set-file-selinux-context'
2560 get and set the SELinux context of a file.
2564 *** `delete-by-moving-to-trash' now only affects commands that specify
2565 trashing. This avoids inadvertently trashing temporary files.
2567 *** Calling `delete-file' or `delete-directory' with a prefix argument
2568 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2570 ** File- and directory-local variable changes
2572 *** You can stop directory local vars from applying to subdirectories.
2573 Add an element (subdirs . nil) to the alist portion of any variables
2574 settings to indicate that the section should not apply to
2577 *** Directory local variables can apply to some file-less buffers.
2578 Affected modes include dired, vc-dir, and log-edit. For example,
2579 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2580 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2581 `hack-dir-local-variables-non-file-buffer' to support this.
2583 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2584 Instead, use "eval: (minor-mode 1)".
2586 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2587 to `inhibit-local-variables-regexps'. As the name suggests, it now
2588 applies to ALL file local variables, not just -*- lines. The
2589 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2594 *** The `quit-window' command now restores the last buffer displayed
2595 in the quitted window.
2597 *** Resizing an Emacs frame now preserves proportional window sizes,
2598 modulo restrictions like window minimum sizes and fixed-size windows.
2600 *** The behavior of `display-buffer' is now customizable in detail.
2602 **** New option `display-buffer-base-action' specifies a list of
2603 user-determined display "actions" (functions and optional arguments
2604 for choosing the displaying window).
2606 This takes precedence over the default display action, which is
2607 specified by `display-buffer-fallback-action'.
2609 **** New option `display-buffer-alist' maps buffer name regexps to
2610 display actions, taking precedence over `display-buffer-base-action'.
2612 *** New option `window-combination-limit'.
2613 The new option `window-combination-limit' allows to return the space
2614 obtained for resizing or creating a window more reliably to the window
2615 from which such space was obtained.
2617 *** New option `window-combination-resize'.
2618 The new option `window-combination-resize' allows to split a window that
2619 otherwise cannot be split because it's too small by stealing space from
2620 other windows in the same combination. Subsequent resizing or deletion
2621 of the window will resize all windows in the same combination as well.
2623 *** New option `frame-auto-hide-function' lets you choose between
2624 iconifying or deleting a frame when burying a buffer in a dedicated
2625 frame, or quitting a window showing a buffer in a frame of its own.
2627 *** New commands `maximize-window' and `minimize-window'.
2628 These maximize and minimize the size of a window within its frame.
2630 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2631 These functions allow to navigate through the live buffers that have
2632 been shown in a specific window.
2634 ** Minibuffer changes
2636 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2637 This is handy for minibuffer-only frames, and is also used for the feature
2638 where mouse-1 pops up *Messages*"', which can now easily be changed.
2640 *** Minibuffers set `truncate-lines' to nil.
2641 If you want to change the value to something else, you could use
2642 for example `minibuffer-setup-hook'.
2644 ** `auto-mode-case-fold' is now enabled by default.
2646 ** `backup-by-copying-when-mismatch' now defaults to t.
2648 ** New basic faces `error', `warning', `success'.
2649 These are used to highlight text indicating failure, caution or
2650 successful operation.
2652 ** New option `list-colors-sort' defines the color sort order
2653 for `list-colors-display'.
2655 ** The variable `focus-follows-mouse' now always defaults to nil.
2658 * Editing Changes in Emacs 24.1
2662 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2663 `isearch-yank-line'.
2665 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2666 `isearch-yank-kill'.
2668 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2670 ** New commands `count-words-region' and `count-words'.
2672 *** M-= is bound to `count-words-region', not `count-lines-region'.
2673 The `count-words-region' command, when called interactively, reports
2674 the number of lines, words, and characters in the region. It is a
2675 superset of the old `count-lines-region', which is now an obsolete
2678 ** The command `just-one-space' (M-SPC), if given a negative argument,
2679 also deletes newlines around point.
2683 *** New option `delete-active-region'.
2684 If non-nil, [delete] and DEL delete the region if it is active and no
2685 prefix argument is given. If set to `kill', those commands kill
2688 *** New command `delete-forward-char', bound to [delete].
2689 This is meant for interactive use, and obeys `delete-active-region'.
2690 The command `delete-char' does not obey `delete-active-region'.
2692 *** `delete-backward-char' is now a Lisp function.
2693 Apart from obeying `delete-active-region', its behavior is unchanged.
2694 However, the byte compiler now warns if it is called from Lisp; Lisp
2695 callers should use delete-char with a negative argument instead.
2697 *** The option `mouse-region-delete-keys' has been deleted.
2699 ** Selection changes.
2701 The default handling of clipboard and primary selections has been
2702 changed to conform with modern X applications. In short, most
2703 commands for killing and yanking text now use the clipboard, while
2704 mouse commands use the primary selection.
2706 In the following, we provide a list of these changes, followed by a
2707 list of steps to get the old behavior back if you prefer that.
2709 *** `select-active-regions' now defaults to t.
2710 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2711 the kill ring. The selected text is put in the primary selection, if
2712 the system possesses a separate primary selection facility (e.g. X).
2714 **** `select-active-regions' also accepts a new value, `only'.
2715 This means to only set the primary selection for temporarily active
2716 regions (usually made by mouse-dragging or shift-selection);
2717 "ordinary" active regions, such as those made with C-SPC followed by
2718 point motion, do not alter the primary selection.
2720 **** `mouse-drag-copy-region' now defaults to nil.
2722 *** mouse-2 is now bound to `mouse-yank-primary'.
2723 This pastes from the primary selection, ignoring the kill-ring.
2724 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2726 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2728 *** `x-select-enable-primary' now defaults to nil.
2729 Thus, commands that kill text or copy it to the kill-ring (such as
2730 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2732 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2733 exactly equivalent to M-w, C-w, and C-y respectively.
2735 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2736 non-nil by default, as Windows does not support the primary selection
2737 between applications.
2739 *** To return to the previous behavior, do the following:
2741 **** Change `select-active-regions' to nil.
2742 **** Change `mouse-drag-copy-region' to t.
2743 **** Change `x-select-enable-primary' to t (on X only).
2744 **** Change `x-select-enable-clipboard' to nil.
2745 **** Bind `mouse-yank-at-click' to mouse-2.
2747 *** Support for X cut buffers has been removed.
2749 *** X clipboard managers are now supported.
2750 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2752 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2753 in the current rectangle. With a prefix argument, this prompts for a
2754 number to count from and for a format string.
2756 ** `redisplay-dont-pause' now defaults to t.
2757 This makes Emacs feel more responsive to editing commands that arrive
2758 at high rate, e.g. if you lean on some key, because stopping redisplay
2759 in the middle (when this variable is nil) forces more expensive
2760 updates later on, and Emacs appears to be unable to keep up.
2762 ** The behavior of <TAB> for active regions in Text mode has changed.
2763 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2764 when the region is active causes Emacs to indent all the lines in the
2765 region, aligning them with the line previous to the first line in the
2766 region (or with the left margin if there is no previous line).
2768 ** When `occur' is called with a prefix argument, matching strings are
2769 collected into the `*Occur*' buffer without line numbers. If there
2770 are parenthesized subexpressions in the specified regexp, `occur'
2771 reads replacement text that may contain \\& and \\N whose convention
2772 follows `replace-match'.
2775 * Changes in Specialized Modes and Packages in Emacs 24.1
2777 ** Archive Mode has basic support for browsing and updating 7z archives.
2781 *** BibTeX mode now supports biblatex.
2782 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2783 `bibtex-entry-field-alist' is now an obsolete alias for
2784 `bibtex-BibTeX-entry-alist'.
2786 *** New command `bibtex-search-entries', bound to C-c C-a.
2788 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2790 *** New variable `bibtex-search-entry-globally'.
2794 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2796 *** The default browser used by the package is now the "xdg-open" program,
2797 on platforms that support it. This calls your desktop's preferred browser.
2801 *** Support for musical notes.
2803 *** Support for logarithmic units.
2805 *** No longer uses the tex prefix for TeX specific unit names when
2806 using TeX or LaTeX mode.
2808 *** New option to highlight selections using faces.
2810 *** `calc-histogram' has the option of using a vector to determine the bins.
2812 *** New "O" option prefix.
2814 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2816 ** Calendar, Diary, and Appt
2818 *** Diary entries can contain non-printing "comments".
2819 See the variable `diary-comment-start'.
2821 *** Appointments can specify their individual warning times.
2822 See the variable `appt-warning-time-regexp'.
2824 *** The function specified by `appt-disp-window-function' may be passed
2825 lists of arguments if multiple appointments are due at similar times.
2826 If you are using a custom function for this, you should update it.
2828 *** New function `diary-hebrew-birthday'.
2830 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2831 may no longer be nil, but must all be strings.
2833 *** The obsolete (since Emacs 22.1) method of enabling the appt
2834 package by adding `appt-make-list' to `diary-hook' has been removed.
2835 Use `appt-activate' instead.
2837 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2838 appt-issue-message (use the function appt-activate)
2839 appt-visible/appt-msg-window (use the variable appt-display-format)
2841 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2842 view-diary-entries, list-diary-entries, show-all-diary-entries
2846 *** New feature to "guess" the style in an existing buffer.
2847 The main entry point is M-x c-guess.
2849 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2851 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2852 Thus C-M-a will, by default, go to the beginning of the immediate function,
2855 *** "Macros with semicolons" can be registered for correct indentation.
2856 Where such a macro ends a line (no semicolon) the next statement is no longer
2857 parsed as a statement continuation.
2859 ** Comint and modes derived from it use the standard completion code.
2863 *** Compilation mode can be used without Font Lock mode.
2864 `compilation-parse-errors-function' is now obsolete.
2866 *** New variable `compilation-filter-start', which is bound while
2867 `compilation-filter-hook' runs. It records the start position of the
2868 text inserted by `compilation-filter'.
2870 *** `compilation-error-screen-columns' and `compilation-first-column'
2871 are obeyed in the editing buffer. So programming language modes can
2872 set them, whereas previously only the value in the *Compilation*
2877 *** Customize buffers now contain a search field.
2878 The search is performed using `customize-apropos'.
2879 To turn off the search field, set `custom-search-field' to nil.
2881 *** Options in customize group buffers start out hidden if not customized.
2882 Use the arrow to the left of the option name to toggle visibility.
2884 *** custom-buffer-sort-alphabetically now defaults to t.
2886 *** The color widget now has a "Choose" button, which allows you to
2887 choose a color via `list-colors-display'.
2891 *** It is now possible to access buses other than the default system
2894 *** The `dbus-register-method' and `dbus-register-property' functions
2895 optionally do not register names.
2897 *** The new function `dbus-register-service' registers a known service
2898 name on a D-Bus without also registering a property or a method.
2902 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2903 if called with a prefix argument, read a file name from the minibuffer
2904 instead of using the current buffer.
2906 *** The "dired local variables" feature of Dired-x is obsolete.
2907 The standard directory local variables feature replaces it.
2911 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2912 controlling attempts to autojoin a channel.
2914 *** New variable `erc-coding-system-precedence': If we use `undecided'
2915 as the server coding system, this variable will then be consulted.
2916 The default is to decode strings that can be decoded as utf-8 as
2917 utf-8, and do the normal `undecided' decoding for the rest.
2921 *** The default value of `eshell-directory-name' has changed
2922 to be an "eshell" directory in `user-emacs-directory'.
2923 The old "~/.eshell/" directory is still used if it exists, though.
2927 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2928 It now supports multithread non-stop debugging and simultaneous
2929 debugging of several threads.
2933 *** RET (`image-toggle-animation') toggles animation, if applicable.
2934 Animation plays once, unless the option `image-animate-loop' is non-nil.
2938 *** New command M-x info-display-manual displays a named Info manual.
2939 If that manual is already visited in some Info buffer, it displays
2940 that buffer. (This is handy if you have many manuals in many *info*
2941 buffers, and don't remember the name of the buffer visiting the manual
2942 you want to consult.) Otherwise, it loads and displays the manual.
2944 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2945 This is for compatibility with the stand-alone Info reader program,
2946 and also because `Info-edit' is a rarely used command that is disabled
2949 ** Mail mode changes (not Message mode)
2951 *** New command M-x mail-add-attachment for adding MIME attachments
2953 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2954 (Its name is misleading, since it has nothing to do with MIME
2955 attachments.) The old name is now an obsolete alias to the new name.
2957 ** MH-E has been updated to MH-E version 8.3.1.
2958 See MH-E-NEWS for details.
2960 ** Modula-2 mode provides auto-indentation.
2962 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2964 ** nXML mode no longer binds C-RET to `nxml-complete'.
2965 Completion is now performed via `completion-at-point', bound to C-M-i
2966 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2967 default), this performs tag completion.
2969 ** Org mode has been updated to version 7.8.09.
2970 See ORG-NEWS for details.
2972 ** Prolog mode has been completely revamped, with lots of additional
2973 functionality such as more intelligent indentation, electricity,
2974 support for more variants, including Mercury, and a lot more.
2978 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2979 in the Rmail incoming message.
2981 *** The variable `rmail-message-filter' no longer has any effect.
2982 This change was made in Emacs 23.1 but was not advertised at the time.
2983 Try using `rmail-show-message-hook' instead.
2987 *** M-x shell prompts for the shell path name if the default directory
2988 is a remote file name and neither the environment variable $ESHELL nor
2989 the variable `explicit-shell-file-name' is set.
2991 *** TAB is now bound to the standard `completion-at-point' command,
2992 which now implements the pcomplete rules for shell command completion.
2996 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2997 if the mail server supports them. This uses either built-in GnuTLS
2998 support, or the starttls.el library. Customize `smtpmail-stream-type'
3001 *** The variable `smtpmail-auth-credentials' has been removed.
3002 By default, the information is now stored in the file ~/.authinfo.
3003 This was the default value of smtpmail-auth-credentials. If you had
3004 customized smtpmail-auth-credentials to a list of user names and
3005 passwords, those settings are not used. During your first connection
3006 to the smtp server, Emacs will prompt for the user name and password,
3007 and offer to save them to ~/.authinfo. Or you can manually copy the
3008 credentials to ~/.authinfo. For example, if you had
3010 (setq smtpmail-auth-credentials
3011 '(("mail.example.org" 25 "jim" "s!cret")))
3013 then the equivalent line in ~/.authinfo would be
3015 machine mail.example.org port 25 login jim password s!cret
3017 See the auth-source manual for more information, e.g. on encrypting
3018 the credentials file.
3020 *** The variable `smtpmail-starttls-credentials' has been removed.
3021 If you had that set, you need to put
3023 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3025 in your ~/.authinfo file instead.
3027 *** SMTPmail defaults to using the address in the From: header as the
3028 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3029 to the address you wish to use instead.
3033 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3034 and `sql-oracle-scan-on'.
3036 *** New options controlling prompting for login parameters.
3037 Each supported product has a custom variable `sql-*-login-params',
3038 which is a list of the parameters to be prompted for before a
3039 connection is established.
3041 *** The command `sql-product-interactive' now takes a prefix argument,
3042 which causes it to prompt for an SQL product.
3044 *** Product-specific SQL interactive commands now take prefix arguments.
3045 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3046 given a prefix argument, prompt for a name for the SQL interactive
3047 buffer. This reduces the need for calling `sql-rename-buffer'.
3049 *** SQL interactive modes suppress command continuation prompts, and
3050 replace tabs with spaces. The first change impacts multiple line SQL
3051 statements entered with C-j between each line, statements yanked into
3052 the buffer and statements sent with `sql-send-*' functions. The
3053 second prevents the MySQL and Postgres interpreters from listing
3054 object name completions when sent text via `sql-send-*' functions.
3056 *** New command `sql-connect' starts a predefined SQLi session,
3057 using the login parameters from `sql-connection-alist'.
3059 *** New "Save Connection" menu item in SQLi buffers.
3060 This gathers the login params specified for the SQLi session, if it
3061 was not started by a connection, and saves them as a new connection.
3063 *** New commands for listing database objects and details:
3064 sql-list-all and sql-list-table.
3066 *** An API for manipulating SQL product definitions has been added.
3070 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3074 *** New inline access method "ksu" (kerberized su).
3076 *** The following access methods are discontinued: "ssh1_old",
3077 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3079 *** The user option `remote-file-name-inhibit-cache' controls whether
3080 remote file attributes are cached for better performance.
3082 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3083 default value to "".
3085 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3086 for remote machines which support SELinux.
3088 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3089 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3090 the degree of parallelism.
3092 ** VC and related modes
3094 *** Support for pulling on distributed version control systems.
3095 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3096 supported (currently with Bzr, Git, and Mercurial), to update the
3097 current branch and working tree. A prefix argument means to prompt
3098 the user for specifics, e.g. a pull location.
3100 *** `vc-update' is now an alias for `vc-pull'.
3102 *** Support for merging on distributed version control systems.
3103 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3104 is supported (currently with Bzr, Git, and Mercurial), to merge
3105 changes from another branch into the current one. It prompts for
3106 specifics, e.g. a merge source.
3108 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3109 shows a diff while querying the user. It defaults to t.
3111 *** Log entries in some Log View buffers can be toggled to display a
3112 longer description by typing RET (log-view-toggle-entry-display).
3113 This is currently supported for Bzr, Git, and Mercurial (to support
3114 another backend, define a `log-view-expanded-log-entry-function').
3115 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3116 use this to display the full log entry for the revision at point.
3118 *** New command `vc-ediff' allows visual comparison of two revisions
3119 of a file similar to `vc-diff', but using ediff backend.
3121 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3122 this was not advertised at the time.
3124 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3125 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3126 this was not advertised at the time.
3132 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3134 *** partial-completion-mode (complete.el) is obsolete.
3135 You can get a comparable behavior with:
3136 (setq completion-styles '(partial-completion initials))
3137 (setq completion-pcm-complete-word-inserts-delimiters t)
3139 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3141 *** pgg is obsolete (use EasyPG instead).
3143 *** sregex.el is obsolete, since rx.el is a strict superset.
3145 *** s-region.el and pc-select.el are obsolete.
3146 They are superseded by shift-select-mode, enabled by default since 23.1.
3148 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3152 *** The Landmark game is now invoked with `landmark', not `lm'.
3153 Its functions and variables have been similarly renamed.
3155 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3156 (This interfered with cua-mode.)
3158 *** f90.el has some support for Fortran 2008 syntax.
3160 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3162 *** New command `nato-region' converts text to NATO phonetic alphabet.
3165 * New Modes and Packages in Emacs 24.1
3167 ** Occur Edit mode applies edits made in *Occur* buffers to the
3168 original buffers. It is bound to "e" in Occur mode.
3170 ** New global minor mode electric-pair-mode.
3171 When enabled, typing an open parenthesis automatically inserts the
3172 matching closing one.
3174 ** New global minor mode electric-indent-mode.
3175 When enabled, typing certain characters triggers reindentation.
3176 Major modes wishing to use this can set electric-indent-chars or
3177 electric-indent-functions.
3179 ** New global minor mode electric-layout-mode.
3180 When enabled, typing certain characters automatically inserts newlines.
3181 Major modes wishing to use this can set electric-layout-rules.
3183 ** tabulated-list.el provides a generic major mode for tabulated data,
3184 from which other modes can be derived.
3186 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3188 ** secrets.el is an implementation of the Secret Service API, an
3189 interface to password managers like GNOME Keyring or KDE Wallet. The
3190 Secret Service API requires D-Bus for communication. The command
3191 `secrets-show-secrets' offers a buffer with a visualization of the
3194 ** notifications.el provides an implementation of the Desktop
3195 Notifications API. It requires D-Bus for communication.
3197 ** soap-client.el supports access to SOAP web services from Emacs.
3198 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3200 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3202 ** New emacs-lock.el package.
3203 The previous version has been moved to obsolete/old-emacs-lock.el.
3204 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3205 against exiting Emacs and killing the buffer can be set separately.
3206 The mechanism for automatically turning off protection for buffers
3207 with dead inferior processes has been generalized.
3210 * Incompatible Lisp Changes in Emacs 24.1
3212 ** Passing a nil argument to a minor mode function call now ENABLES
3213 the minor mode unconditionally. This is so that you can write e.g.
3215 (add-hook 'text-mode-hook 'foo-mode)
3217 to enable foo-mode in Text mode buffers, removing the need for
3218 `turn-on-foo-mode' style functions. This affects all mode commands
3219 defined by `define-minor-mode'. If called interactively, the mode
3220 command still toggles the minor mode.
3222 ** The return value of `backup-buffer' has changed.
3223 It is now a list of three elements, where the second element is a list
3224 describing the original file's SELinux context. If Emacs or the
3225 system lacks SELinux support, the context list is (nil nil nil nil).
3226 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3228 ** `char-direction-table' and the `char-direction' function were deleted.
3229 They were buggy and inferior to the new support of bidirectional
3230 editing introduced in Emacs 24. If you need the bidirectional
3231 properties of a character, use `get-char-code-property' with the last
3232 argument `bidi-class'.
3234 ** `copy-directory' now copies the source directory as a subdirectory
3235 of the target directory, if the latter is an existing directory. The
3236 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3237 the contents directly into a pre-existing target directory.
3239 ** For mouse click input events in the text area, the Y pixel
3240 coordinate in the POSITION list now counts from the top of the text
3241 area, excluding any header line. Previously, it counted from the top
3244 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3245 been further reduced. Now a backquote not followed by a space is
3246 always treated as a "new-style" backquote. Please remove all
3247 "old-style" backquotes from your code. If your code uses backquotes
3248 as documented in the Elisp manual, and compiles without warning, then
3249 you have nothing to do in this regard. Code not following the
3250 appropriate conventions may fail to compile.
3252 The most common cause of trouble seems to be an old-style backquote
3253 followed by a newline. Another cause of trouble is vector notation
3254 for key sequence notation: instead of [(control ,)] and [(control ')],
3255 you should write [(control ?,)] and [(control ?')], which will work in
3258 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3259 was not advertised at the time. The function `custom-initialize-delay'
3260 replaced all known uses.
3262 ** `view-buffer' now treats special mode-class in the same way that
3263 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3264 major mode is special).
3266 ** Menu and tool bar changes
3268 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3269 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3270 With these alist entries omitted, `make-frame' checks the value of the
3271 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3272 a menu-bar or tool-bar, respectively. If the alist entries are added,
3273 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3275 *** The menu bar bindings's caches are not used any more.
3276 Use (where-is-internal <def> nil t) instead.
3278 ** Regions created by mouse dragging are now normal active regions,
3279 similar to those created by shift-selection (see Selection changes
3280 above). In previous Emacs versions, these regions were delineated by
3281 `mouse-drag-overlay'; that variable has been removed.
3283 ** The fourth argument of `filter-buffer-substring' has been removed.
3284 If you want to remove text properties from the final result, simply
3285 pass the result through substring-no-properties.
3287 ** cl.el no longer provides `cl-19'.
3289 ** The following obsolete functions and aliases have been removed
3290 (the appropriate new function is given in parentheses; "not needed"
3291 means you can just remove all calls to the function in question):
3293 *** `comint-kill-output' (`comint-delete-output')
3294 *** `decompose-composite-char' (`char-to-string')
3295 *** `outline-visible' (`outline-invisible-p')
3296 *** `internal-find-face' (`facep')
3297 *** `internal-get-face' (`facep and check-face')
3298 *** `frame-update-faces' (not needed)
3299 *** `frame-update-face-colors' (`frame-set-background-mode')
3300 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3301 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3302 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3303 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3304 *** `x-make-font-unbold' (`make-face-unbold')
3305 *** `x-make-font-unitalic' (`make-face-unitalic')
3306 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3307 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3308 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3309 *** `char-bytes' (== 1)
3310 *** `isearch-return-char' (`isearch-printing-char')
3311 *** `make-local-hook' (not needed)
3312 *** `set-screen-height' (`set-frame-height')
3313 *** `set-screen-width' (`set-frame-width')
3315 ** The following obsolete variables and varaliases have been removed
3316 (the appropriate new variable is given in parentheses):
3318 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3319 *** `vc-header-alist' (`vc-BACKEND-header')
3320 *** `directory-sep-char' (== ?/)
3321 *** `font-lock-defaults-alist' (`font-lock-defaults')
3322 *** `e' (`float-e').
3324 ** The following obsolete files were removed:
3325 sc.el, x-menu.el, rnews.el, rnewspost.el
3327 ** The format of the finder-inf.el file has changed, since the Finder
3328 mechanism is now based on the package system. The variable
3329 `finder-package-info' is replaced by `package--builtins' and
3330 `finder-keywords-hash'.
3332 ** When generating autoloads, `update-directory-autoloads' no longer
3333 assumes every inspected file is in your `load-path'. It instead
3334 generates relative names according to the current `load-path'.
3337 * Lisp Changes in Emacs 24.1
3339 ** Code can now use lexical scoping by default instead of dynamic scoping.
3340 The `lexical-binding' variable enables lexical scoping for local
3341 variables. It is typically set via a file-local variable in the first
3342 line of the file, in which case it applies to all the code in that
3345 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3346 binding instead of the old dynamic binding mode.
3348 *** Lexically scoped interpreted functions are represented with a new form
3349 of function value which looks like (closure ENV ARGS &rest BODY).
3351 *** New macro `letrec' to define recursive local functions.
3353 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3354 So do `defcustom' and other forms that call `defvar' as a subroutine.
3356 *** New function `special-variable-p' to check whether a variable is
3357 declared as dynamically bound.
3359 *** The form ((lambda ...) ...) is deprecated.
3361 ** An Emacs Lisp testing tool is now included.
3362 Emacs Lisp developers can use this tool to write automated tests for
3363 their code. See the ERT info manual for details.
3365 ** Changes for bidirectional display and editing
3367 *** New function `current-bidi-paragraph-direction'.
3368 This returns the base direction of the paragraph at point.
3370 *** New function `bidi-string-mark-left-to-right'.
3371 Given a string containing characters from right-to-left scripts, this
3372 function returns another string which can be safely inserted into a
3373 buffer, such that any following text will be always displayed to the
3374 right of that string. (This works by appending an invisible Unicode
3375 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3377 This is useful when the buffer has overall left-to-right paragraph
3378 direction and you need to insert a string whose contents are not known
3379 in advance, without disrupting the layout of the line.
3383 *** Window tree functions are accessible in Elisp.
3384 Functions are provided to return the parent, siblings or child windows
3385 of any window including internal windows (windows not associated with a
3386 buffer) in the window tree.
3388 **** New function `window-valid-p' gives non-nil for live and internal
3391 **** Window manipulation can deal with internal windows.
3392 Many window handling functions like `split-window', `delete-window', or
3393 `delete-other-windows' as well as the window resizing functions can now
3394 act on any window including internal ones.
3396 *** window-total-height/-width vs window-body-height/-width.
3397 The function `window-height' has been renamed to `window-total-height'
3398 and `window-width' has been renamed to `window-body-width'. The old
3399 names are provided as aliases. Two new functions `window-total-width'
3400 and `window-body-height' are provided.
3402 *** Window parameters specific to window handling functions.
3403 For each window you can specify a parameter to override the default
3404 behavior of a number of functions like `split-window', `delete-window'
3405 and `delete-other-windows'. The variable `ignore-window-parameters'
3406 allows to ignore processing such parameters.
3408 *** New semantics of third argument of `split-window'.
3409 The third argument of `split-window' has been renamed to SIDE and can be
3410 set to any of the values 'below, 'right, 'above, or 'left to make the
3411 new window appear on the corresponding side of the window that shall be
3412 split. Any other value of SIDE will cause `split-window' to split the
3413 window into two side-by-side windows as before.
3415 *** Window resizing functions.
3416 A new standard function for resizing windows called `window-resize' has
3417 been introduced. This and all other functions for resizing windows no
3418 longer delete any windows when they become too small.
3420 *** Deleting the selected window now selects the most recently selected
3421 live window on that frame instead.
3423 *** `adjust-window-trailing-edge' adjustments.
3424 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3425 is able to resize other windows if a window adjacent to the trailing
3426 edge cannot be shrunk any more. This makes its behavior more similar to
3427 that of Emacs 21 without compromising, however, its inability to delete
3428 windows which was introduced in Emacs 22.
3430 *** Window-local buffer lists.
3431 Windows now have local buffer lists. This means that removing a buffer
3432 from display in a window will preferably show the buffer previously
3433 shown in that window with its previous window-start and window-point
3434 positions. This also means that the same buffer may be automatically
3435 shown twice even if it already appears in another window.
3437 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3438 which if non-nil requires the buffer to be displayed in the currently
3439 selected window, signaling an error otherwise. If nil, another window
3440 can be used, e.g. if the selected one is strongly dedicated.
3442 *** `split-window-vertically' and `split-window-horizontally' renamed
3443 to `split-window-below' and `split-window-right' respectively.
3444 The old names are kept as aliases.
3448 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3449 named ACTION, and takes a display action of the same form as
3450 `display-buffer-base-action' (see Changes, above). A non-nil,
3451 non-list value is treated specially, as the old meaning.
3453 **** New variable `display-buffer-overriding-action'.
3455 **** The procedure of `display-buffer' etc. to choose a window is
3456 determined by combining `display-buffer-overriding-action',
3457 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3458 and `display-buffer-fallback-action'. The second and fourth of these
3459 are user-customizable variables.
3461 See the docstring of `display-buffer' for details.
3463 *** New functions `window-state-get' and `window-state-put'.
3464 These functions allow to save and restore the state of an arbitrary
3465 frame or window as an Elisp object.
3469 *** New variable `completion-extra-properties' used to specify extra
3470 properties of the current completion:
3471 - :annotate-function, same as the old completion-annotate-function.
3472 - :exit-function, function to call after completion took place.
3474 *** Functions on `completion-at-point-functions' can return any of the
3475 properties valid for `completion-extra-properties'.
3477 *** `completion-annotate-function' is obsolete.
3479 *** New `metadata' method for completion tables. The metadata thus returned
3480 can specify various details of the data returned by `all-completions':
3481 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3482 used to select a style in completion-category-overrides.
3483 - `annotation-function' to add annotations in *Completions*.
3484 - `display-sort-function' to specify how to sort entries in *Completions*.
3485 - `cycle-sort-function' to specify how to sort entries when cycling.
3487 *** `minibuffer-local-filename-must-match-map' is not used any more.
3488 Instead, the bindings in `minibuffer-local-filename-completion-map'
3489 are combined with `minibuffer-local-must-match-map'.
3491 *** New variable `completing-read-function' allows overriding the
3492 behavior of `completing-read'.
3494 ** `glyphless-char-display' can now distinguish between graphical and
3495 text terminal display, via a char-table entry that is a cons cell.
3497 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3498 Instead, the offending function is removed.
3502 *** New function `run-hook-wrapped' for running an abnormal hook by
3503 passing the hook functions as arguments to a "wrapping" function.
3504 Like `run-hook-with-args-until-success', it stops at the first
3505 non-nil return value.
3507 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3508 set of "wrapping" filters, similar to around advice.
3509 (A version of this macro was actually added in Emacs 23.2 but was not
3510 advertised at the time.)
3514 *** New macro `condition-case-unless-debug' (this was actually added in
3515 Emacs 23.1 as condition-case-no-debug, but not advertised)
3517 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3519 *** Variable `stack-trace-on-error' removed.
3521 *** The debugger can now "continue" from an error, which means it will
3522 jump to the error handler as if the debugger had not been invoked
3523 instead of jumping all the way to the top-level.
3525 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3526 This can be useful when `inhibit-quit' is set.
3528 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3529 named Emacs server instances.
3531 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3532 to redirect STDOUT to a file.
3534 ** The function `format-time-string' now supports the %N directive,
3535 for higher-resolution time stamps.
3537 ** New input reading functions
3539 *** New function `read-char-choice' reads a restricted set of
3540 characters, discarding any inputs not inside the set.
3542 *** The command `read-color' now requires a match for a color name
3543 or RGB triplet, instead of signaling an error if the user provides
3546 **** `facemenu-read-color' is now an alias for `read-color'.
3548 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3549 The variable is now used to load all kind of supported dynamic libraries,
3550 not just image libraries. The previous name is still available as an
3553 ** Syntax parsing changes
3555 *** New variable `syntax-propertize-function'.
3556 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3557 This allows syntax-table properties to be set independently from font-lock:
3558 just call syntax-propertize to make sure the text is propertized.
3559 Together with this new variable come a new hook
3560 syntax-propertize-extend-region-functions, as well as two helper functions:
3561 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3562 as-is; and syntax-propertize-rules which provides a new way to specify
3565 *** Syntax tables support a new "comment style c" additionally to style b.
3567 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3569 ** frame-local variables cannot be let-bound any more.
3571 ** Major and minor mode changes
3573 *** `set-auto-mode' now respects mode: local variables at the end of files,
3574 as well as those in the -*- line.
3576 *** `prog-mode' is a new major mode from which programming modes
3579 **** `prog-mode-hook' can be used to enable features for programming
3580 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3581 on-the-fly spell checking for comments and strings.
3583 **** New minor modes `prettify-symbols-mode' and
3584 `global-prettify-symbols-mode' let the user enable symbol
3585 prettification (replacing a string like "lambda" with the Greek lambda
3588 *** New hook `change-major-mode-after-body-hook', run by
3589 `run-mode-hooks' just before any other mode hooks.
3591 *** Enabled globalized minor modes can be disabled in specific major modes.
3592 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3593 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3595 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3597 ** File-handling changes
3599 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3600 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3601 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3602 argument is supplied (see Trash changes, above).
3604 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3606 ** Tool-bars can display separators.
3607 Tool-bar separators are handled like menu separators in menu-bar maps,
3608 i.e. via menu entries of the form `(menu-item "--")'.
3612 *** Animated images support (currently animated gifs only).
3614 **** `image-animated-p' returns non-nil if an image can be animated.
3616 **** `image-animate' animates a supplied image spec.
3618 **** `image-animate-timer' returns the timer object for an image that
3621 *** `image-extension-data' has been renamed to `image-metadata'.
3622 The old name is an obsolete alias to the new one.
3624 *** Image mode can view any image type that ImageMagick supports.
3625 This requires Emacs to be built with ImageMagick support.
3627 **** New function `imagemagick-types', defined if ImageMagick support
3628 is enabled, returns a list of image file extensions that your
3629 ImageMagick installation supports.
3631 **** New function `imagemagick-register-types' enables ImageMagick
3632 image types in Image mode and in `create-image' and other helper
3635 **** New option `imagemagick-types-inhibit' excludes certain
3636 ImageMagick image types from `imagemagick-register-types'.
3638 **** With ImageMagick support, there are extra Image mode commands to
3639 resize and rotate images: `image-transform-fit-to-height',
3640 `image-transform-fit-to-width', `image-transform-set-rotation', and
3641 `image-transform-set-scale'.
3643 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3644 passes it to the mail user agent function. This argument specifies an
3645 action for returning to the caller after finishing with the mail. For
3646 example, this is used by Rmail to optionally delete a mail window.
3648 ** XML and HTML parsing
3649 If Emacs is compiled with libxml2 support, there are two new
3650 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3651 and `libxml-parse-xml-region' (which parses XML). Both return an
3652 Emacs Lisp parse tree.
3654 ** Networking and encryption changes
3656 *** `open-network-stream' can now be used to open an encrypted stream.
3657 It now accepts an optional `:type' parameter for initiating a TLS
3658 connection, directly or via STARTTLS. To do STARTTLS, additional
3659 parameters (`:end-of-command', `:success', `:capabilities-command')
3660 must also be supplied.
3662 *** New library gnutls.el.
3663 The new function `gnutls-available-p' returns non-nil if Emacs is
3664 built with GnuTLS support. The main entry points are
3665 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3666 these functions through `open-network-stream', because that can
3667 upgrade connections through STARTTLS opportunistically or use plain
3668 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3671 *** New primitive `secure-hash' that supports many secure hash algorithms:
3672 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3673 sha1.el has been removed. The `sha1' feature is provided by default.
3677 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3679 ** Progress reporters can now "spin".
3680 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3681 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3682 time you call `progress-reporter-update' on that progress reporter,
3683 with a nil or omitted VALUE argument, the reporter message is
3684 displayed with a "spinning bar".
3686 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3687 being reverted, even if the buffer has a local `revert-buffer-function'.
3689 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3690 If delayed-warnings-list is non-nil, the command loop calls
3691 `delayed-warnings-hook' after `post-command-hook'. At present, this
3692 is only used by Emacs on some platforms to display warnings during
3693 startup, which might otherwise not be noticed. This uses the
3694 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3696 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3698 ** New function `make-composed-keymap' that constructs a new keymap
3699 from multiple input maps. You can use this to make a keymap that
3700 inherits from multiple maps, eg:
3701 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3703 ** New function `string-prefix-p'.
3704 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3706 ** New reader macro ## that stands for the empty symbol.
3707 This means that the empty symbol can now be read back. Also, #: by itself
3708 (when not immediately followed by a possible symbol character) stands for
3709 an empty uninterned symbol.
3711 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3713 ** The following functions and variables are obsolete:
3715 *** `tooltip-use-echo-area' is obsolete.
3716 Rather than setting this to t, disable Tooltip mode instead.
3718 *** buffer-substring-filters is obsolete.
3719 Use `filter-buffer-substring-functions' instead.
3721 *** `byte-compile-disable-print-circle' is obsolete.
3723 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3724 Use `post-command-hook' instead.
3726 *** `font-lock-maximum-size' is obsolete.
3729 * Changes in Emacs 24.1 on Non-Free Operating Systems
3731 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3732 and also when HOME is set to C:\ by default.
3734 ** New configure.bat options
3736 *** --enable-checking builds Emacs with extra runtime checks.
3738 *** --distfiles specifies files to be included in binary distribution.
3740 *** --without-gnutls disables automatic GnuTLS detection.
3742 *** --lib for general library linkage, works with the USER_LIBS build variable.
3744 ** New make target `dist' to create binary distribution for MS Windows.
3746 ** The Lisp function `w32-default-color-map' is now obsolete.
3747 (It is only used internally in the Emacs C code.)
3749 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3750 reappear on mouse-over. (Requires OS X 10.6 or later.)
3752 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3753 other platforms, rather than inserting its contents into the buffer.
3756 ----------------------------------------------------------------------
3757 This file is part of GNU Emacs.
3759 GNU Emacs is free software: you can redistribute it and/or modify
3760 it under the terms of the GNU General Public License as published by
3761 the Free Software Foundation, either version 3 of the License, or
3762 (at your option) any later version.
3764 GNU Emacs is distributed in the hope that it will be useful,
3765 but WITHOUT ANY WARRANTY; without even the implied warranty of
3766 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3767 GNU General Public License for more details.
3769 You should have received a copy of the GNU General Public License
3770 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3775 paragraph-separate: "[
\f]*$"