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.
444 *** New option `epa-mail-aliases'.
446 You can set this to a list of alias expansions for keys to use
447 in `epa-mail-encrypt'.
449 If one element of the variable's value is ("foo@bar.com" "foo@hello.org"),
450 that means: when one of the recipients of the message being encrypted
451 is `foo@bar.com', encrypt the message for `foo@hello.org' instead.
453 If one element of the variable's value is ("foo@bar.com"),
454 that means: when one of the recipients of the message being encrypted
455 is `foo@bar.com', ignore that name as regards encryption.
456 This is useful to avoid a query when you have no key for that name.
460 *** New option `erc-accidental-paste-threshold-seconds'.
461 If set to a number, this can be used to avoid accidentally paste large
462 amounts of data into the ERC input.
467 *** New macro `skip-unless' allows skipping ERT tests.
468 See the ERT manual for details.
473 *** `eshell' now supports visual subcommands and options
474 Eshell has been able to handle "visual" commands (interactive,
475 non-line oriented commands such as top that require display
476 capabilities not provided by eshell) by running them in an Emacs
477 terminal emulator. See `eshell-visual-commands'.
479 This feature has been extended to subcommands and options that make a
480 usually line-oriented command a visual command. Typical examples are
481 "git log" and "git <command> --help" which display their output in a
482 pager by default. See `eshell-visual-subcommands' and
483 `eshell-visual-options'.
486 *** Added Eshell-Tramp module
487 External su and sudo commands are now the default; the internal,
488 Tramp-using variants can still be used by enabling the eshell-tramp
493 *** New option `f90-smart-end-names'.
495 ** Icomplete is a bit more like Ido.
497 *** key bindings to navigate through and select the completions.
499 *** The icomplete-separator is customizable, and its default has changed.
501 *** Removed icomplete-show-key-bindings.
503 *** Icomplete-mode by defaults applies to all forms of minibuffer completion.
504 (setq icomplete-with-completion-tables '(internal-complete-buffer))
505 will revert to the old behavior.
509 *** Ido has a manual now.
511 *** `ido-use-virtual-buffers' takes a new value 'auto.
513 *** `ido-decorations' has been slightly extended to give a bit more control.
518 *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
519 visit the next image file and the previous image file in the same
520 directory, respectively.
522 *** New commands to show specific frames of multi-frame images.
523 `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
524 next or previous frame. `F' (`image-goto-frame') shows a specific frame.
526 *** New commands to speed up, slow down, or reverse animation.
528 *** The command `image-mode-fit-frame' deletes other windows.
529 When toggling, it restores the frame's previous window configuration.
530 It also has an optional frame argument, which can be used by Lisp
531 callers to fit the image to a frame other than the selected frame.
535 *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
536 will cycle through faces in `hi-lock-face-defaults' without prompting.
539 *** New global command `M-s h .' (`highlight-symbol-at-point')
540 highlights the symbol found near point without prompting,
541 using the next face automatically.
545 *** New option `imenu-generic-skip-comments-and-strings'.
549 *** New face `info-index-match' is used to highlight matches in index
550 entries displayed by `Info-index-next', `Info-virtual-index' and
555 *** Better indentation of multiple-variable declarations.
556 If declaration spans several lines, variables on the following lines
557 are lined up to the first one.
559 *** We now recognize and better indent continuations in array
562 *** New option `js-switch-indent-offset`.
564 ** MH-E has been updated to MH-E version 8.5.
565 See MH-E-NEWS for details.
569 *** Font locking for texinfo comments and new keywords
570 *** Completion in Octave file buffers
572 *** Jump to definition
573 *** Documentation lookup/search
574 *** Code cleanup and various bug fixes
576 ** OPascal mode is the new name for Delphi mode.
578 *** All delphi-* variables and functions have been renamed to opascal-*.
579 *** `delphi-newline-always-indents' is not supported any more.
580 Use `electric-indent-mode' instead.
581 *** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
585 *** The format of `archive-contents' files, generated by package
586 repositories, has changed to allow a new (fifth) element in the data
587 vectors, containing an associative list with extra properties.
589 *** `describe-package' buffer uses the `:url' extra property to
590 display a `Homepage' header, if it's present.
592 *** In the buffer produced by `describe-package', there are now buttons
593 listing the keywords related to that package. You can click on them
594 to see other packages related to any given keyword.
596 *** In the *Packages* buffer, `f' or the Package->Filter menu filters
597 the packages by a keyword.
601 *** `prolog-use-smie' has been removed, along with the non-SMIE
606 *** The new command `remember-notes' creates a buffer which is saved
609 You may think of it as a *scratch* buffer whose content is preserved.
610 In fact, it was designed as a replacement for *scratch* buffer and can
611 be used that way by setting `initial-buffer-choice' to
612 `remember-notes' and `remember-notes-buffer-name' to "*scratch*".
613 Without the second change, *scratch* buffer will still be there for
614 notes that do not need to be preserved.
616 *** The Remember package can now store notes in separates files.
617 You can use the new function `remember-store-in-files' within the
618 `remember-handler-functions' option.
620 See `remember-data-directory' and `remember-directory-file-name-format'
621 for new options related to this function.
625 *** Customize `rmail-mbox-format' to influence some minor aspects of
626 how Rmail displays non-MIME messages.
629 *** The `unrmail' command now converts from BABYL to mboxrd format,
630 rather than mboxo. Customize `unrmail-mbox-format' to change this.
634 *** New option `ruby-encoding-magic-comment-style'.
636 *** New option `ruby-custom-encoding-magic-comment-template'.
640 *** Improved syntax highlighting and indentation.
642 *** Add more Ruby file types to `auto-mode-alist'.
644 *** New option `ruby-align-to-stmt-keywords'.
646 *** New `electric-indent-mode' integration.
648 ** Search and Replace
651 *** New global command `M-s .' (`isearch-forward-symbol-at-point')
652 starts a symbol (identifier) incremental search forward with the
653 symbol found near point added to the search string initially.
655 *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
656 and adds it to the search string.
658 *** `M-s i' in Isearch mode toggles the variable `isearch-invisible'
659 between nil and the value of the option `search-invisible' (or `open'
662 *** `query-replace' skips invisible text when `search-invisible' is nil,
663 and opens overlays with hidden text when `search-invisible' is `open'.
666 *** A negative prefix arg of replacement commands replaces backward.
667 `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
668 backward, `M-s w words M-- M-%' replaces a sequence of words backward.
671 *** By default, prefix arguments do not now terminate Isearch mode.
672 Set `isearch-allow-prefix' to nil to restore old behavior.
674 *** More Isearch commands accept prefix arguments, namely
675 `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
678 *** Word search now matches whitespace at the beginning/end
679 of the search string if it contains leading/trailing whitespace.
680 In an incremental word search or when using a non-nil LAX argument
681 of `word-search-regexp', the lax matching can also match part of
682 the first word (in addition to the lax matching of the last word).
683 The same rules are now applied to the symbol search with the difference
684 that it matches symbols, and non-symbol characters between symbols.
689 *** New command `ses-rename-cell' allows assigning names to SES cells.
693 *** `explicit-bash-args' now always defaults to use --noediting.
694 During initialization, Emacs no longer expends a process to decide
695 whether it is safe to use Bash's --noediting option. These days
696 --noediting is ubiquitous; it was introduced in 1996 in Bash version 2.
700 *** `sh-mode' now has the mode own `add-log-current-defun-function'.
701 You can pick the name of the function and the variables with `C-x 4 a'.
703 *** The SMIE indentation engine is now used by default.
705 ** SMIE indentation can be customized via `smie-config'.
706 The customization can be guessed by Emacs by providing a sample indented
707 file and letting SMIE learn from it.
711 *** New option `term-suppress-hard-newline'.
713 ** Todo mode has been rewritten and enhanced.
714 New features include:
715 - support for multiple todo files and archive files of done items;
716 - renaming, reordering, moving, merging, and deleting categories;
717 - sortable tabular summaries of categories and the types of items they contain;
718 - cross-category lists of items filtered by specific criteria;
719 - more fine-grained interaction with the Emacs diary, by being able to decide
720 for each todo item whether it appears in the Fancy Diary display;
721 - highly flexible new item insertion and item editing;
722 - moving items between categories, storing done items in their category or in
723 archive files, undoing or unarchiving done items;
724 - reprioritizing items by inputting a numerical priority;
725 - extensive customizability of operation and display, including numerous faces.
726 The Todo mode user manual describes all commands and most user options.
727 To support some of these features, a new file format is used, which is
728 incompatible with the old format; however, you can convert old todo and done
729 item files to the new format on initializing the first new todo file, or at any
730 later time with the provided conversion command. The old version of
731 todo-mode.el has been made obsolete and renamed otodo-mode.el.
733 ** trace-function was largely rewritten.
734 New features include:
735 - no prompting for the destination buffer, unless a prefix-arg was used.
736 - additionally to prompting for a destination buffer, when a prefix-arg is
737 used, the user can enter a "context", i.e. Lisp expression whose value at the
738 time the function is entered/exited will be printed along with the function
739 name and arguments. Useful to trace the value of (current-buffer) or
740 (point) when the function is invoked.
744 *** The experimental url syntax for remote file names is withdrawn.
747 *** New connection method "adb", which allows to access Android
748 devices by the Android Debug Bridge. The variable `tramp-adb-program'
749 can be used to adapt the path of the "adb" program, if needed.
751 *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
752 "scpc" and "rsyncc" are discontinued. The ssh option
753 "ControlMaster=auto" is set automatically in all ssh-based methods,
757 *** Handlers for `file-acl' and `set-file-acl' for remote machines
758 which support POSIX ACLs.
761 *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
762 for remote machines which support filesystem notifications.
764 ** VC and related modes
767 *** In VC directory mode, `D' displays diffs between VC-controlled
768 whole tree revisions.
771 *** In VC directory mode, `L' lists the change log for the current VC
772 controlled tree in a window.
775 *** In VC directory mode, `I' shows a log of changes that will be
776 received with a pull operation.
779 *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
780 under current version control system. When called with a prefix
781 argument, you can remove a file from the ignored file list.
784 *** `cvs-append-to-ignore' has been renamed to `vc-cvs-append-to-ignore'
785 because it is moved to vc-cvs.el.
789 *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
791 *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
795 *** The commands `woman-default-faces' and `woman-monochrome-faces'
796 are obsolete. Customize the `woman-*' faces instead.
798 ** Obsolete packages:
800 *** Iswitchb is made obsolete by icomplete-mode.
802 *** longlines.el is obsolete; use visual-line-mode instead.
807 *** terminal.el is obsolete; use term.el instead.
809 *** The previous version of todo-mode.el is obsolete and renamed otodo-mode.el.
814 *** yow.el is obsolete; use fortune.el or cookie1.el instead.
817 *** The Info-edit command is obsolete. Editing Info nodes by hand
818 has not been relevant for some time.
821 * New Modes and Packages in Emacs 24.4
823 ** New package `eww' is a built-in web browser.
824 It is only available if Emacs is compiled with libxml2 support.
826 ** New minor mode `superword-mode', defined in subword.el
827 `superword-mode' overrides the default word motion commands to treat
828 symbol_words as a single word, similar to what `subword-mode' does and
829 using the same internal functions.
831 ** New package nadvice.el offers lighter-weight advice facilities.
833 - add-function/remove-function which can be used to add/remove code on any
834 function-carrying place, such as process-filters or `<foo>-function' hooks.
835 - advice-add/advice-remove to add/remove a piece of advice on a named function,
836 much like `defadvice' does.
838 ** New package frameset.el.
839 It provides a set of operations to save a frameset (the state of all
840 or a subset of the existing frames and windows, somewhat similar to a
841 frame configuration), both in-session and persistently, and restore it
842 at some point in the future.
845 ** New package filenotify.el provides an interface for file system
846 notifications. It requires that Emacs be compiled with one of the
847 low-level libraries gfilenotify.c, inotify.c or w32notify.c.
850 * Incompatible Lisp Changes in Emacs 24.4
852 ** `kill-region' lost its `yank-handler' optional argument.
854 ** `(input-pending-p)' no longer runs other timers which are ready to
855 run. The new optional CHECK-TIMERS param allows for the prior behavior.
857 ** `defvar' and `defcustom' in a let-binding affect the "external" default.
859 ** The syntax of ?» and ?« is now punctuation instead of matched parens.
860 Some languages match those as »...« and others as «...» so better stay neutral.
863 ** In compiled Lisp files, the header no longer includes a timestamp.
865 ** The default file coding for Emacs Lisp files is now utf-8.
866 (See `file-coding-system-alist'.) In most cases, this change is
867 transparent, but files that contain unusual characters without
868 specifying an explicit coding system may fail to load with obscure
869 errors. You should either convert them to utf-8 or add an explicit
872 ** `overriding-terminal-local-map' no longer replaces the local keymaps.
873 It used to disable the minor mode, major mode, and text-property keymaps,
874 whereas now it simply has higher precedence.
876 ** Default process filters and sentinels are not nil any more.
877 Instead they default to a function which does what the nil value used to do.
879 ** `read-event' does not return decoded chars in ttys any more.
880 Just as was the case in Emacs-22 and before, decoding of tty input according to
881 keyboard-coding-system is not performed in read-event any more. But contrary
882 to that past, it is still done before input-decode-map/function-key-map/...
884 ** Removed inhibit-local-menu-bar-menus.
886 ** frame-local variables that affect redisplay do not work any more.
887 More specifically, the redisplay does not bother to check for a frame-local
888 value when looking up variables.
890 ** nil and "unbound" are indistinguishable in `symbol-function'.
891 `symbol-function' never signals `void-function' any more.
892 `fboundp' returns non-nil if the symbol was `fset' to nil.
894 ** `defadvice' does not honor the `freeze' flag and cannot advise
895 special-forms any more.
897 ** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
898 VAR was bound to nil which was not tremendously useful and just lead to
899 spurious warnings about an unused var.
901 ** The return value of `backup-buffer' has changed.
902 The second argument is no longer an SELinux context, instead it is an
903 alist of extended attributes as returned by the new function
904 `file-extended-attributes'. The attributes can be applied to another
905 file using `set-file-extended-attributes'.
907 ** `visited-file-modtime' now returns -1 for nonexistent files.
908 Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
909 in the presence of files with negative time stamps.
911 ** The cars of the elements in `interpreter-mode-alist' are now
912 treated as regexps rather than literal strings. This change should
913 not affect you unless you are using `interpreter-mode-alist' for
914 something (not just adding elements to it).
917 * Lisp Changes in Emacs 24.4
920 ** The second argument of `eval' can now specify a lexical environment.
923 ** New functions `special-form-p' and `macrop'.
925 ** New macro `define-alternatives' can be used to define generic commands.
926 Generic commands are interactive functions whose implementation can be
927 selected among several alternatives, as a matter of user preference.
929 ** The `defalias-fset-function' property lets you catch `defalias'
930 calls, and redirect them to your own function, instead of `fset'.
932 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
933 text-property on the first char.
936 ** New variable `enable-dir-local-variables'.
937 Directory-local variables are ignored if this is nil. This may be
938 useful for modes that want to ignore directory-locals while still
939 respecting file-local variables.
942 ** New function `get-pos-property'.
944 ** Completion changes
946 *** The separator for `completing-read-multiple' can now be a regexp.
947 The default separator has been changed to allow surrounding spaces
950 *** The `common-substring' arg of `display-completion-list' is obsolete.
951 Either use `completion-all-completions', which returns highlighted
952 strings (including for partial or substring completion), or call
953 `completion-hilit-commonality' to add the highlight.
958 *** Functions to pop up menus and dialogs now work on all terminals,
959 including TTYs. This includes `x-popup-menu', `x-popup-dialog',
960 `message-box', `yes-or-no-p', etc.
962 The function `display-popup-menus-p' will now return non-nil for a
963 display or frame whenever a mouse is supported on that display or
966 *** New hook `tty-setup-hook'.
968 ** New hook `pre-redisplay-function'.
971 ** New bool-vector set operation functions:
972 *** `bool-vector-exclusive-or'
973 *** `bool-vector-union'
974 *** `bool-vector-intersection'
975 *** `bool-vector-set-difference'
976 *** `bool-vector-not'
977 *** `bool-vector-subsetp'
978 *** `bool-vector-count-consecutive'
979 *** `bool-vector-count-population'
982 ** Comparison functions =, <, >, <=, >= now take many arguments.
984 ** Error-handling changes
987 *** New function `define-error'.
989 *** `with-demoted-errors' takes an additional argument `format'.
992 ** New macro with-eval-after-load. Like eval-after-load, but better behaved.
994 ** New library subr-x.el for misc helper functions
996 *** `hash-table-keys'
998 *** `hash-table-values'
1000 *** `string-blank-p`
1001 *** `string-empty-p`
1003 *** `string-reverse`
1004 *** `string-trim-left'
1005 *** `string-trim-right'
1007 *** `string-remove-prefix'
1008 *** `string-remove-suffix'
1010 ** Obsoleted functions:
1013 *** `lisp-complete-symbol'
1014 *** `field-complete'
1015 *** `minibuffer-completion-contents'
1016 *** `isearch-nonincremental-exit-minibuffer'
1017 *** `isearch-filter-visible'
1018 *** `generic-make-keywords-list'
1019 *** `get-upcase-table' (use `case-table-get-table' instead).
1021 ** `with-wrapper-hook' is obsoleted by `add-function'.
1022 The few hooks that used with-wrapper-hook are replaced as follows:
1023 *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1024 *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1025 *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1027 ** `byte-compile-interactive-only-functions' is now obsolete.
1028 It has been replaced by the symbol property 'interactive-only.
1031 ** `split-string' now takes an optional argument TRIM.
1032 The value, if non-nil, is a regexp that specifies what to trim from
1033 the start and end of each substring.
1035 ** New function `string-suffix-p'.
1037 ** File-handling changes
1040 *** Support for filesystem notifications.
1041 Emacs now supports notifications of filesystem changes, such as
1042 creation, modification, and deletion of files. This requires the
1043 `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1044 MS-Windows systems, this is supported for Windows XP and newer
1048 *** The 9th element returned by `file-attributes' is now unspecified.
1049 Formerly, it was t if the file's gid would change if file were deleted
1050 and recreated. This value has been inaccurate for years on many
1051 platforms, and nobody seems to have noticed or cared.
1054 *** The 6th argument to `copy-file' has been renamed to
1055 PRESERVE-EXTENDED-ATTRIBUTES as it now handles both SELinux context
1059 *** The function `file-ownership-preserved-p' now has an optional
1060 argument GROUP which causes it check for file group too. This can be
1061 used in place of the 9th element of `file-attributes'.
1063 *** The function `set-visited-file-modtime' now accepts a 0 or -1
1064 argument, with the same interpretation as the returned value of
1065 `visited-file-modtime'.
1067 ** Changes in autorevert.el
1070 *** If Emacs is compiled with file notification support, notifications
1071 are used instead of checking the time stamp of the files. You can
1072 disable this by setting the user option `auto-revert-use-notify' to
1073 nil. Alternatively, a regular expression of directories to be
1074 excluded from file notifications can be specified by
1075 `auto-revert-notify-exclude-dir-regexp'.
1078 *** The new user option `auto-revert-remote-files' enables reversion
1079 of remote files when set to non-nil.
1083 *** The function `face-spec-set' is now like `setq' for face specs.
1084 Its third arg now accepts values specifying a face spec type (defface,
1085 custom, or override spec), and the relevant spec is set accordingly.
1088 *** New function `add-face-text-property', which can be used to
1089 conveniently prepend/append new face properties.
1091 *** Face specs set via Custom themes now replace the `defface' spec
1092 rather than inheriting from it (as do face specs set via Customize).
1094 *** New face characteristic (supports :underline (:style wave))
1095 specifies whether or not the terminal can display a wavy line.
1098 *** New face spec attribute :distant-foreground
1099 specifies foreground to use if background color is near the foreground
1100 color that would otherwise have been used.
1105 *** `image-animated-p' is now `image-multi-frame-p'.
1106 It returns non-nil for any image that contains multiple frames,
1107 whether or not it specifies a frame delay.
1110 *** New variable `image-default-frame-delay' gives the frame delay for
1111 animated images which do not specify a frame delay.
1114 *** New functions `image-current-frame' and `image-show-frame' for getting
1115 and setting the current frame of a multi-frame image.
1119 *** Namespace cleanup by obsolete-aliasing functions to use `eieio-' prefix.
1120 **** object-name -> eieio-object-name
1121 **** object-class -> eieio-object-class
1122 **** object-class-fast -> eieio--object-class
1123 **** object-name-string -> eieio-object-name-string
1124 **** object-num-slots -> eieio--object-num-slots
1125 **** object-set-name-string -> eieio-object-set-name-string
1126 **** class-parent -> eieio-class-parent
1127 **** class-parents -> eieio-class-parents
1128 **** class-children -> eieio-class-children
1129 **** class-num-slots -> eieio--class-num-slots
1130 **** class-precedence-list -> eieio-class-precedence-list
1131 **** All generated class-* and object-* field accessors are now
1132 prefixed with `eieio-' as well.
1134 *** Obsoleted functions:
1136 **** class-direct-subclasses
1137 **** class-direct-superclasses
1139 ** Changes in encoding and decoding of text
1142 *** New coding-system `prefer-utf-8'.
1143 This is like `undecided' but prefers UTF-8 on decoding if the text to
1144 be decoded does not contain any invalid UTF-8 sequences. On encoding,
1145 any non-ASCII characters are automatically encoded as UTF-8.
1148 *** New attributes of coding-systems whose type is `undecided'.
1149 Two new attributes, `:inhibit-null-byte-detection' and
1150 `:inhibit-iso-escape-detection', determine how to detect encoding of
1151 text that includes null bytes and ISO-2022 escape sequences,
1152 respectively. Each of these attributes can be either nil, zero, or
1153 t. If it is t, decoding text ignores null bytes and, respectively,
1154 ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
1155 with no-conversion and ISO-2022 sequences cause Emacs to assume the
1156 text is encoded in one of the ISO-2022 encodings, such as
1157 iso-2022-7bit. If the value is zero, Emacs consults the variables
1158 inhibit-null-byte-detection and inhibit-iso-escape-detection, which
1160 The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1161 UTF-8 encoding and decoding, whenever possible.
1163 These attributes are only meaningful for coding-systems of type
1164 `undecided'. (The type of a coding-system is determined by its
1165 `:coding-type' attribute and can be accessed by calling the
1166 `coding-system-type' function.)
1168 ** `time-to-seconds' is not obsolete any more.
1170 ** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
1171 When you edit DIR/FILE, Emacs normally creates a symbolic link
1172 DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
1173 is being edited. Formerly, if there was already a non-symlink file
1174 named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
1175 through DIR/.#FILE.9. These fallbacks have been removed, so that
1176 Emacs now no longer locks DIR/FILE in that case.
1178 On file systems that do not support symbolic links, the lock is now a
1179 regular file with contents being what would have been in the symlink.
1182 ** New functions `group-gid' and `group-real-gid'.
1184 ** Changes to the Emacs Lisp Coding Conventions in Emacs 24.4
1187 *** The package descriptor and name of global variables, constants,
1188 and functions should be separated by two hyphens if the symbol is not
1189 meant to be used by other packages.
1192 * Changes in Emacs 24.4 on Non-Free Operating Systems
1194 ** The procedure for building Emacs on MS-Windows has changed.
1195 It is now built by running the same configure script as on all other
1196 platforms. This requires the MSYS environment and MinGW development
1197 tools. See the updated instructions in nt/INSTALL for details.
1199 Using the Posix configure script and Makefile's also means a change in
1200 the directory structure of the Emacs installation on Windows. It is
1201 now the same as on GNU and Unix systems. In particular, the auxiliary
1202 programs, such as cmdproxy.exe and hexl.exe, are in
1203 libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1204 version), version-independent site-lisp is in share/emacs/site-lisp,
1205 version-specific Lisp files are in share/emacs/VERSION/lisp and in
1206 share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1207 files are in share/emacs/VERSION/etc. (Emacs knows about all these
1208 directories and will find the files in there automatically; there's no
1209 need to set any variables due to this change.)
1212 ** Emacs on Windows 2000 and later can now access files and directories
1213 whose names cannot be encoded in the current system codepage.
1215 The new variable `w32-unicode-filenames' controls this feature: if it
1216 is t, Emacs uses Unicode APIs to pass file names to system calls,
1217 which lifts the limitation of file names to the current locale.
1220 ** The "generate a backtrace on fatal error" feature now works on MS Windows.
1221 The backtrace is written to the 'emacs_backtrace.txt' file in the
1222 directory where Emacs was running.
1225 ** The variable `buffer-file-type' is no longer supported.
1226 Setting it has no effect, and %t in the mode-line format is ignored.
1227 Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1228 modifying it has no effect.
1231 ** Lock files now work on MS-Windows.
1232 This allows to avoid losing your edits if the same file is being
1233 edited in another Emacs session or by another user. See the node
1234 "Interlocking" in the Emacs User Manual for the details. To disable
1235 file locking, customize `create-lockfiles' to nil.
1237 ** Improved fullscreen support on Mac OS X.
1238 Both native (>= OSX 10.7) and "old style" fullscreen are supported.
1239 Customize `ns-use-native-fullscreen' to change style. For >= 10.7
1240 native is the default.
1242 ** OSX >= 10.7 can use sRGB colorspace.
1243 Customize `ns-use-srgb-colorspace' to change style. nil is the default.
1244 Note: This does not apply to images.
1247 * Installation Changes in Emacs 24.3
1249 ** The default X toolkit is now Gtk+ version 3.
1250 If you don't pass `--with-x-toolkit' to configure, or if you use
1251 `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1252 to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1253 You can explicitly require a specific version by passing
1254 `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1256 ** New configure option `--enable-link-time-optimization', to utilize
1257 an appropriate feature provided by GCC since version 4.5.0.
1259 ** New configure option `--without-all' to disable most of the optional
1260 features (image support, etc.) that are normally enabled by default.
1262 ** New configure option `--enable-gcc-warnings' (for developing/debugging
1263 Emacs). If building with GCC, this enables compile-time checks that
1264 warn/give errors about possibly-questionable C code. On a recent GNU
1265 system there should be no warnings; on older and on non-GNU systems
1266 the results may be useful to developers.
1268 ** The configure option `--enable-use-lisp-union-type' has been
1269 renamed to `--enable-check-lisp-object-type', as the resulting
1270 Lisp_Object type no longer uses a union to implement the compile time
1271 check that this option enables.
1273 ** The configure option `--disable-maintainer-mode' has been removed,
1274 as it was confusingly-named and rarely useful.
1276 ** The configure options `--program-prefix', `--program-suffix', and
1277 `--program-transform-name' apply to more than just the installed
1278 binaries. Now they also affect the man pages, icons, and the
1279 etc/emacs.desktop file; but not the info pages, since this would break
1280 links between the various manuals.
1282 ** You can use `NO_BIN_LINK=t make install' to prevent the installation
1283 overwriting "emacs" in the installation bin/ directory with a link
1286 ** Emacs uses libtinfo in preference to libncurses, if available.
1288 ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1289 /usr/pkg/lib to the linker search path. You must add them yourself if
1292 ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1293 (from the bin and libexec directories, respectively). The former is
1294 no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1297 * Startup Changes in Emacs 24.3
1299 ** Emacs no longer searches for `leim-list.el' files beneath the standard
1300 lisp/ directory. There should not be any there anyway. If you have
1301 been adding them there, put them somewhere else; e.g., site-lisp.
1303 ** The `--no-site-lisp' command line option now works for Nextstep builds.
1306 * Changes in Emacs 24.3
1310 *** `C-h f' (`describe-function') can now perform autoloading.
1311 When this command is called for an autoloaded function whose docstring
1312 contains a key substitution construct, that function's library is
1313 automatically loaded, so that the documentation can be shown
1314 correctly. To disable this, set `help-enable-auto-load' to nil.
1316 *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1317 even after their associated libraries have been loaded (and the
1318 autoloads have been redefined as functions).
1322 *** Images displayed via ImageMagick now support transparency and the
1323 :background image specification property.
1325 *** When available, ImageMagick support is automatically enabled.
1326 It is no longer necessary to call `imagemagick-register-types'
1327 explicitly to install ImageMagick image types; that function is called
1328 automatically at startup, or when customizing an imagemagick- option.
1330 *** Setting `imagemagick-types-inhibit' to t now disables the use of
1331 ImageMagick to view images. (You must call `imagemagick-register-types'
1332 afterwards if you do not use customize to change this.)
1334 *** The new variable `imagemagick-enabled-types' also affects which
1335 ImageMagick types are treated as images. The function
1336 `imagemagick-filter-types' returns the list of types that will be
1339 *** ImageMagick images now support the :max-width and :max-height
1342 *** Some data types aren't auto-detected by ImageMagick. Adding
1343 :format to `create-image' may help if the content type is in the
1344 new variable `image-format-suffixes'.
1348 *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1349 next and previous path separator, respectively.
1351 *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1352 in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1353 non-nil before enabling the mode.
1357 *** New option `mode-line-default-help-echo' specifies the help text
1358 (shown in a tooltip or in the echo area) for any part of the mode line
1359 that does not have its own specialized help text.
1361 *** You can now click mouse-3 in the coding system indicator to invoke
1362 `set-buffer-file-coding-system'.
1364 ** Server and client
1366 *** emacsclient now obeys string values for `initial-buffer-choice',
1367 if it is told to open a new frame without specifying any file to visit
1368 or expression to evaluate.
1370 *** New option `server-auth-key' specifies a shared server key.
1372 ** Emacs now generates backtraces on fatal errors.
1373 On encountering a fatal error, Emacs now outputs a textual description
1374 of the fatal signal, and a short backtrace on platforms like glibc
1375 that support backtraces.
1377 ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1378 This minor mode replaces `toggle-read-only', which is now obsolete.
1380 ** Most `y-or-n' prompts now allow you to scroll the selected window.
1381 Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1382 respectively, without exiting from the prompt.
1384 ** In the Package Menu, newly-available packages are listed as "new",
1385 and sorted above the other "available" packages by default.
1387 ** If your Emacs was built from a bzr checkout, the new variable
1388 `emacs-bzr-version' contains information about the bzr revision used.
1390 ** New option `create-lockfiles' specifies usage of lockfiles.
1391 It defaults to t. Changing it to nil inhibits the creation of lock
1392 files (use this with caution).
1394 ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1395 variables on remote hosts.
1397 ** The entry for PCL-CVS has been removed from the Tools menu.
1398 The PCL-CVS commands are still available via the keyboard.
1400 ** Using "unibyte: t" in Lisp source files is obsolete.
1401 Use "coding: raw-text" instead.
1403 ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1404 has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1405 The previous binding, introduced in Emacs 24.1, was a mistake, because
1406 `C-c LETTER' bindings are reserved for user customizations.
1408 ** Internationalization
1410 *** New language environment: Persian.
1412 *** New input method `vietnamese-vni'.
1414 ** Nextstep (GNUstep / Mac OS X) port
1416 *** Support for fullscreen and the frame parameter fullscreen.
1418 *** A file dialog is used for open/save operations initiated from the
1422 * Editing Changes in Emacs 24.3
1424 ** Search and Replace
1426 *** Non-regexp Isearch now performs "lax" space matching.
1427 Each sequence of spaces in the supplied search string may match any
1428 sequence of one or more whitespace characters, as specified by the
1429 variable `search-whitespace-regexp'. (This variable is also used by a
1430 similar existing feature for regexp Isearch.)
1432 *** New Isearch command `M-s SPC' toggles lax space matching.
1433 This applies to both ordinary and regexp Isearch.
1435 *** New option `replace-lax-whitespace'.
1436 If non-nil, `query-replace' uses flexible whitespace matching too.
1439 *** Global `M-s _' starts a symbol (identifier) incremental search,
1440 and `M-s _' in Isearch toggles symbol search mode.
1441 `M-s c' in Isearch toggles search case-sensitivity.
1443 ** Navigation commands
1445 *** New binding `M-g c' for `goto-char'.
1447 *** New binding `M-g TAB' for `move-to-column'.
1449 *** `M-g TAB' (`move-to-column') prompts for a column number if called
1450 interactively with no prefix arg. Previously, it moved to column 1.
1452 ** New option `yank-handled-properties' allows processing of text
1453 properties on yanked text, in ways that are more general than just
1454 removing them (as is done by `yank-excluded-properties').
1456 ** New option `delete-trailing-lines' specifies whether
1457 M-x delete-trailing-whitespace should delete trailing lines at the end
1458 of the buffer. It defaults to t.
1460 ** `C-u M-=' now counts lines/words/characters in the entire buffer.
1462 ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1463 `ucs-insert' is now an obsolete alias for `insert-char'.
1465 ** The `z' key no longer has a binding in most special modes.
1466 It used to be bound to `kill-this-buffer', but `z' is too easy to
1469 ** New command `C-x r M-w' (`copy-rectangle-as-kill').
1470 It copies the region-rectangle as the last rectangle kill.
1474 *** `C-x r +' is now overloaded to invoke `append-to-register'.
1476 *** New option `register-separator' specifies the register containing
1477 the text to put between collected texts for use with
1478 M-x append-to-register and M-x prepend-to-register.
1481 * Changes in Specialized Modes and Packages in Emacs 24.3
1483 ** Common Lisp emulation (CL)
1485 *** CL's main entry is now (require 'cl-lib).
1486 `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1487 i.e., all its definitions have the "cl-" prefix (and internal definitions
1488 use the "cl--" prefix).
1490 If `cl' provided a feature under the name `foo', then `cl-lib'
1491 provides it under the name `cl-foo' instead; with the exceptions of the
1492 few `cl' definitions that had to use `foo*' to avoid conflicts with
1493 pre-existing Elisp entities. These have been renamed to `cl-foo'
1494 rather than `cl-foo*'.
1496 The old `cl' is now deprecated and is mainly just a bunch of aliases that
1497 provide the old, non-prefixed names. Some exceptions are listed below:
1499 *** `cl-flet' is not like `flet' (which is deprecated).
1500 Instead it obeys the behavior of Common-Lisp's `flet'.
1501 In particular, in cl-flet function definitions are lexically scoped,
1502 whereas in flet the scoping is dynamic.
1504 *** `cl-labels' is slightly different from `labels'.
1505 The difference is that it relies on the `lexical-binding' machinery
1506 (as opposed to the `lexical-let' machinery used previously) to capture
1507 definitions in closures, so such closures will only work if `lexical-binding'
1510 *** `cl-letf' is not exactly like `letf'.
1511 The only difference is in details that relate to some deprecated usage
1512 of `symbol-function' in place forms.
1514 *** `progv' was rewritten to use the `let' machinery.
1515 A side effect is that variables without corresponding values are bound
1516 to nil rather than being made unbound.
1518 *** The following methods of extending `setf' are obsolete
1519 (use features from gv.el instead):
1520 `define-modify-macro' (use `gv-letplace')
1521 `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1522 `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1523 `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1527 *** Changes are now highlighted using the same color scheme as in
1528 modern VCSes. Deletions are displayed in red (new faces
1529 `diff-refine-removed' and `smerge-refined-removed', and new definition
1530 of `diff-removed'), insertions in green (new faces `diff-refine-added'
1531 and `smerge-refined-added', and new definition of `diff-added').
1533 *** The variable `diff-use-changed-face' defines whether to use the
1534 face `diff-changed', or `diff-removed' and `diff-added' to highlight
1535 changes in context diffs.
1537 *** The new command `diff-delete-trailing-whitespace' removes trailing
1538 whitespace introduced by a diff.
1540 ** Ediff now uses the same color scheme as Diff mode.
1544 A new version of python.el, which provides several new features, including:
1545 per-buffer shells, better indentation, Python 3 support, and improved
1546 shell-interaction compatible with iPython (and virtually any other
1549 *** Some user options have been replaced/renamed, including (old -> new):
1550 **** python-indent -> python-indent-offset
1551 **** python-guess-indent -> python-indent-guess-indent-offset
1552 **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1553 **** python-use-skeletons -> python-skeleton-autoinsert
1555 *** Some user options have been removed, including:
1557 **** `python-indent-string-contents': Strings are never indented.
1559 **** `python-honour-comment-indentation':
1560 Comments are always considered as indentation markers.
1562 **** `python-continuation-offset': Indentation is automatically
1563 calculated in a pep8 compliant way depending on the context.
1565 **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1566 Have no direct mapping as the shell interaction is completely different.
1568 **** `python-python-command', `python-jython-command':
1569 Replaced by `python-shell-interpreter'.
1571 **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1572 `python-pdbtrack-minor-mode-string', `python-source-modes':
1575 *** Some commands have been replaced (old -> new):
1576 **** python-insert-class -> python-skeleton-class
1577 **** python-insert-def -> python-skeleton-def
1578 **** python-insert-for -> python-skeleton-for
1579 **** python-insert-if -> python-skeleton-if
1580 **** python-insert-try/except -> python-skeleton-try
1581 **** python-insert-try/finally -> python-skeleton-try
1582 **** python-insert-while -> python-skeleton-while
1583 **** python-find-function -> python-nav-jump-to-defun
1584 **** python-next-statement -> python-nav-forward-sentence
1585 **** python-previous-statement -> python-nav-backward-sentence
1586 **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1587 **** python-end-of-defun-function -> python-nav-end-of-defun
1588 **** python-send-buffer -> python-shell-send-buffer
1589 **** python-send-defun -> python-shell-send-defun
1590 **** python-send-region -> python-shell-send-region
1591 **** python-send-region-and-go -> emulate with python-shell-send-region
1592 and python-shell-switch-to-shell
1593 **** python-send-string -> python-shell-send-string
1594 **** python-switch-to-python -> python-shell-switch-to-shell
1595 **** python-describe-symbol -> python-eldoc-at-point
1599 *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1601 *** The D-Bus object manager interface is implemented.
1603 *** Variables of type :(u)int32 and :(u)int64 accept floating points,
1604 if their value does not fit into Emacs's integer range.
1606 *** The function `dbus-call-method' is now non-blocking.
1607 It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1609 *** Signals can also be sent as unicast messages.
1611 *** The argument list of `dbus-register-signal' has been extended,
1612 according to the new match rule types of D-Bus.
1614 *** `dbus-init-bus' supports private connections.
1616 *** There is a new function `dbus-setenv'.
1618 ** `desktop-path' no longer includes the "." directory.
1619 Desktop files are now located in ~/.emacs.d by default.
1623 *** `dired-do-async-shell-command' executes each file sequentially
1624 if the command ends in `;' (when operating on multiple files).
1625 Otherwise, it executes the command on each file in parallel.
1627 *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1628 `dired-do-chown', and `dired-do-touch' yanks the attributes of the
1631 *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1632 `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1633 mark/unmark/flag all files in the active region.
1635 *** The minibuffer default for `=' (`dired-diff') has changed.
1636 It is now the backup file for the file at point, if one exists.
1637 In Transient Mark mode the default is the file at the active mark.
1639 *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1640 The global binding for `M-=', `count-words-region' is in effect.
1644 *** New module "notifications", which can send a notification when you
1645 receive a private message or your nickname is mentioned.
1647 *** ERC will look up server/channel names via auth-source and use any
1650 *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1651 only applies to messages sent by lurkers.
1653 ** reStructuredText mode
1655 *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1656 fontification, comment handling, and customization have all been revised
1659 *** Support for `imenu' and `which-function-mode'.
1661 *** The reStructuredText syntax is more closely covered.
1662 Sphinx support has been improved.
1664 *** `rst-insert-list' inserts new list or continues existing lists.
1666 *** A negative prefix argument always works for `rst-adjust'.
1668 *** The window configuration is reset after displaying a TOC.
1670 *** The constant `rst-version' describes the rst.el package version.
1674 *** Support for percent literals and recognition of regular expressions
1675 in method calls without parentheses with more methods, including Cucumber
1678 *** Improved syntax highlighting and indentation.
1680 *** New command `ruby-toggle-block', bound to `C-c {'.
1682 *** Some non-standard keybindings/commands have been removed:
1684 **** `ruby-electric-brace'; use `electric-indent-mode' instead.
1686 **** `ruby-mark-defun'; use `mark-defun'.
1688 **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1689 appropriate settings for the variables `beginning-of-defun-function'
1690 and `end-of-defun-function'.
1692 **** Non-standard keybindings for `backward-kill-word', `comment-region',
1693 `reindent-then-newline-and-indent' and `newline' have been removed.
1695 ** Shell Script mode
1697 *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1699 *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1701 *** `sh-use-smie' lets you choose a new indentation and navigation code.
1705 *** The free software compiler GHDL is supported (and now the default).
1707 *** Support for the VHDL-AMS packages has been added/updated.
1709 *** Updated to the 2002 revision of the VHDL standard.
1711 *** Accepts \r and \f as whitespace.
1715 *** The faces used by Apropos are now directly customizable.
1716 These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1717 see the `apropos' Custom group for details.
1719 *** The old options whose values specified faces to use have been removed
1720 (i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
1724 *** This package has been rewritten to use Tabulated List mode.
1726 *** Option `Buffer-menu-buffer+size-width' is now obsolete.
1727 Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1731 *** Algebraic simplification mode is now the default.
1732 To restrict to the limited simplifications given by the former
1733 default simplification mode, use `m I'.
1737 *** You can customize the header text that appears above each calendar month.
1738 See the variable `calendar-month-header'.
1740 *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1742 *** The calendars produced by cal-html include holidays.
1743 Customize `cal-html-holidays' to change this.
1747 *** The major modes from the parser generators "Bovine" and "Wisent"
1748 are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1749 are in `auto-mode-alist', and the corresponding manuals are included.
1753 **** Menu support for the "Configuration" feature. This allows users to
1754 choose the active configuration (such as debug or install) from the menu.
1756 **** New command `ede-set' to interactively set project-local variables.
1758 **** Support for compiling, debugging, and running in "generic" projects.
1760 **** Autoconf editing support for M4 macros with complex arguments.
1762 **** Compilation support for the "linux" project type.
1764 **** "simple" projects have been removed; use "generic" projects instead.
1768 **** Support for parsing #include statements inside a namespace in C/C++.
1770 **** Improved support for 'extern "C"' declarations in C/C++.
1772 **** The ability to ignore more common special C/C++ preprocessor symbols,
1773 such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1774 If available, include cdefs.h as an additional source of preprocessor symbols.
1776 **** Improved C/C++ function pointer parsing.
1778 **** In Python, support for converting imports to include file names.
1780 **** Ability to dynamically determine the Python load path.
1782 **** Support for the Python 'WITH' and 'AT' keywords.
1784 **** Improved tooltip completion.
1788 **** The SRecode manual is now included.
1790 **** Tag generation supports constructor/destructor settings and system
1791 include differentiation.
1793 **** Addition of 'Framework' support: Frameworks are specified when a
1794 particular kind of library (such as Android) is needed in a common language
1797 **** Support for nested templates and let variables override based on priority.
1799 **** Support for merging tables from multiple related modes, such as
1800 default -> c++ -> arduino.
1802 ** Compile has a new option `compilation-always-kill'.
1806 *** `custom-reset-button-menu' now defaults to t.
1808 *** Non-option variables are never matched in `customize-apropos' and
1809 `customize-apropos-options' (i.e., the prefix argument does nothing for
1810 these commands now).
1814 *** The variables `term-default-fg-color' and `term-default-bg-color'
1815 are now deprecated in favor of the customizable face `term'.
1817 *** You can customize how to display ANSI terminal colors and styles
1818 by customizing the corresponding `term-color-<COLOR>',
1819 `term-color-underline' and `term-color-bold' faces.
1823 *** The syntax has been extended in order to allow ad-hoc proxy definitions.
1825 *** Remote processes are now also supported on remote MS-Windows hosts.
1829 *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1830 Previously, this slot stored semicolon-separated attribute-value pairs
1831 appended to some imap URLs, but this is not compatible with RFC 3986.
1832 So now the `filename' slot stores the entire path and query components,
1833 and the `attributes' slot is always nil.
1835 *** New function `url-encode-url' for encoding a URI string.
1836 The `url-retrieve' function now uses this to encode its URL argument,
1837 in case that is not properly encoded.
1839 *** New command `url-cookie-list' displays all the current cookies, and
1840 allows deleting selected cookies.
1842 ** notifications.el supports now version 1.2 of the Notifications API.
1843 The function `notifications-get-capabilities' returns the supported
1846 ** Flymake uses fringe bitmaps to indicate errors and warnings.
1847 See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1848 `flymake-warning-bitmap'.
1850 ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1851 specifying URL types that should be converted to remote file names at
1852 the FFAP prompt. The default is now '("ftp").
1854 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
1855 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1857 ** New option `mouse-avoidance-banish-position' specifies where the
1858 `banish' mouse avoidance setting moves the mouse.
1860 ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1861 closing brackets to be aligned with the line of the opening bracket.
1863 ** In Proced mode, new command `proced-renice' renices marked processes.
1865 ** New option `async-shell-command-buffer' specifies the buffer to use
1866 for a new asynchronous `shell-command' when the default output buffer
1867 `*Async Shell Command*' is already in use.
1869 ** SQL mode has a new option `sql-db2-escape-newlines'.
1870 If non-nil, newlines sent to the command interpreter will be escaped
1871 by a backslash. The default does not escape the newlines and assumes
1872 that the sql statement will be terminated by a semicolon.
1874 ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1875 (and modes that derive from it), sorts the column at point, or the Nth
1876 column if a numeric prefix argument is given.
1878 ** `which-func-modes' now defaults to t, so Which Function mode, when
1879 enabled, applies to all applicable major modes.
1881 ** `winner-mode-hook' now runs when the mode is disabled, as well as when
1884 ** Follow mode no longer works by using advice.
1885 The option `follow-intercept-processes' has been removed.
1887 ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1889 ** Hooks renamed to avoid obsolete "-hooks" suffix:
1890 *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1891 *** semantic-change-hooks -> semantic-change-functions
1892 *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1893 *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1894 *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1895 *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1896 *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1897 *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1898 *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1899 *** rcirc-activity-hooks -> rcirc-activity-functions
1900 *** rcirc-print-hooks -> rcirc-print-functions
1901 *** dbus-event-error-hooks -> dbus-event-error-functions
1902 *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1903 *** checkdoc-style-hooks -> checkdoc-style-functions
1904 *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1905 *** archive-extract-hooks -> archive-extract-hook
1906 *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1907 *** hfy-post-html-hooks -> hfy-post-html-hook
1908 *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1909 *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1910 *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1911 *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
1913 ** Obsolete packages
1916 In most cases, assoc+member+push+delq work just as well.
1917 And in any case it's just a terrible package: ugly semantics, terrible
1918 inefficiency, and not namespace-clean.
1927 * Incompatible Lisp Changes in Emacs 24.3
1929 ** Docstrings starting with `*' no longer indicate user options.
1930 Only variables defined using `defcustom' are considered user options.
1931 The function `user-variable-p' is now an obsolete alias for
1932 `custom-variable-p'.
1934 ** The return values of `defalias', `defun' and `defmacro' have changed,
1935 and are now undefined. For backwards compatibility, `defun' and
1936 `defmacro' currently return the name of the newly defined
1937 function/macro, but this should not be relied upon.
1939 ** `random' by default now returns a different random sequence in
1940 every Emacs run. Use `(random S)', where S is a string, to set the
1941 random seed to a value based on S, in order to get a repeatable
1942 sequence in later calls.
1944 ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1945 that substring is inserted literally even if the LITERAL arg is
1946 non-nil, instead of causing an error to be signaled.
1948 ** `select-window' now always makes the window's buffer current.
1949 It does so even if the window was selected before.
1951 ** The function `x-select-font' can return a font spec, instead of a
1952 font name as a string. Whether it returns a font spec or a font name
1953 depends on the graphical library.
1955 ** `face-spec-set' no longer sets frame-specific attributes when the
1956 third argument is a frame (that usage was obsolete since Emacs 22.2).
1958 ** `set-buffer-multibyte' now signals an error in narrowed buffers.
1960 ** The CL package's `get-setf-method' function no longer exists.
1961 Generalized variables are now part of core Emacs Lisp, and implemented
1962 differently to the way cl.el used to do it. It is not possible to
1963 define a compatible replacement for `get-setf-method'. See the file
1964 gv.el for internal details of the new implementation.
1966 ** The arguments of `dbus-register-signal' are no longer just strings,
1967 but keywords or keyword-string pairs. The old argument list will
1968 still be supported for Emacs 24.x.
1970 ** Miscellaneous name changes
1971 Some Lisp symbols have been renamed to correct their spelling,
1972 or to be more consistent with standard Emacs terminology.
1974 *** Renamed functions
1975 **** hangul-input-method-inactivate -> hangul-input-method-deactivate
1976 **** inactivate-input-method -> deactivate-input-method
1977 **** quail-inactivate -> quail-deactivate
1978 **** robin-inactivate -> robin-deactivate
1979 **** viper-inactivate-input-method -> viper-deactivate-input-method
1980 **** viper-inactivate-input-method-action ->
1981 viper-deactivate-input-method-action
1982 **** ucs-input-inactivate -> ucs-input-deactivate
1985 The old hooks are still supported for backward compatibility, but they
1986 are deprecated and will be removed eventually.
1987 **** input-method-inactivate-hook -> input-method-deactivate-hook
1988 **** robin-inactivate-hook -> robin-deactivate-hook
1989 **** quail-inactivate-hook -> quail-deactivate-hook
1991 *** Renamed variables
1992 **** follow-deactive-menu -> follow-inactive-menu
1993 **** inactivate-current-input-method-function ->
1994 deactivate-current-input-method-function
1996 ** Some obsolete functions, variables, and faces have been removed:
1997 *** `last-input-char', `last-command-char', `unread-command-char'
1998 *** `facemenu-unlisted-faces'
1999 *** `rmail-decode-mime-charset'
2000 *** `iswitchb-read-buffer'
2001 *** `sc-version', `sc-submit-bug-report'
2002 *** `set-char-table-default'
2003 *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2004 *** `compile-internal'
2006 *** `mode-line-inverse-video'
2007 *** `follow-mode-off-hook'
2008 *** `cvs-commit-buffer-require-final-newline'
2009 (use `log-edit-require-final-newline' instead)
2010 *** `cvs-changelog-full-paragraphs'
2011 (use `log-edit-changelog-full-paragraphs' instead)
2012 *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2013 *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2014 *** `vc-master-templates' (use `vc-handled-backends' instead)
2015 *** `vc-checkout-carefully'
2018 * Lisp Changes in Emacs 24.3
2020 ** CL-style generalized variables are now in core Elisp.
2021 `setf' is autoloaded; `push' and `pop' accept generalized variables.
2022 You can define your own generalized variables using `gv-define-simple-setter',
2023 `gv-define-setter', etc.
2025 ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2026 This can significantly speed up execution of non-byte-compiled code,
2027 but can also bump into previously unnoticed cyclic dependencies.
2028 These are generally harmless: they will simply cause the macro calls
2029 to be left for later expansion (as before), but will result in a
2030 warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2031 You may wish to restructure your code so this does not happen.
2033 ** New sampling-based Elisp profiler.
2034 Try M-x profiler-start, do some work, and then call M-x profiler-report.
2035 When finished, use M-x profiler-stop. The sampling rate can be based on
2036 CPU time or memory allocations.
2038 ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2039 The interpretation of the DECLS is determined by `defun-declarations-alist'.
2041 ** New macros `setq-local' and `defvar-local'.
2043 ** Face underlining can now use a wave.
2045 ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2046 of `read-regexp' accepts a string ending with a colon and space, and its
2047 second argument DEFAULTS can be a list of strings accessible via `M-n'
2048 in the minibuffer ahead of other hard-coded useful regexp-related values.
2049 More commands use `read-regexp' now to read their regexp arguments.
2053 *** New function `completion-table-with-quoting' to handle completion
2054 in the presence of quoting, such as file completion in shell buffers.
2056 *** New function `completion-table-subvert' to use an existing completion
2057 table, but with a different prefix.
2061 *** New error type and new function `user-error'.
2062 These do not trigger the debugger.
2064 *** New option `debugger-bury-or-kill', saying what to do with the
2065 debugger buffer when exiting debug.
2067 *** Set `debug-on-message' to enter the debugger when a certain
2068 message is displayed in the echo area. This can be useful when trying
2069 to work out which code is doing something.
2071 *** New var `inhibit-debugger', automatically set to prevent accidental
2072 recursive invocations.
2076 *** New command `fit-frame-to-buffer' adjusts the frame height to
2079 *** The command `fit-window-to-buffer' can adjust the frame height
2080 if the new option `fit-frame-to-buffer' is non-nil.
2082 *** New macro `with-temp-buffer-window', similar to
2083 `with-output-to-temp-buffer'.
2085 *** `temp-buffer-resize-mode' no longer resizes windows that have been
2088 *** New option `switch-to-buffer-preserve-window-point' to restore a
2089 window's point when switching buffers.
2091 *** New display action function `display-buffer-no-window' to not
2092 display the buffer in a window.
2094 *** New display action alist entry `allow-no-window' to indicate the
2095 caller of `display-buffer' is ready to handle the case of not
2096 displaying the buffer in a window.
2098 *** New display action alist entries `window-height' and `window-width'
2099 specify the size of new windows created by `display-buffer'.
2101 *** New display action alist entry `pop-up-frame-parameters', if
2102 non-nil, specifies frame parameters to give any newly-created frame.
2104 *** New display action alist entry `inhibit-switch-frame', if non-nil,
2105 tells display action functions to avoid changing which frame is
2108 *** New display action alist entry `previous-window', if non-nil,
2109 specifies window to reuse in `display-buffer-in-previous-window'.
2111 *** New display action functions `display-buffer-below-selected',
2112 and `display-buffer-in-previous-window'.
2114 *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2115 now accept a third argument to avoid choosing the selected window.
2117 *** Additional values recognized for option `window-combination-limit'.
2119 *** The following variables are obsolete, as they can be replaced by
2120 appropriate entries in the `display-buffer-alist' function introduced
2122 **** `dired-shrink-to-fit'
2123 **** `display-buffer-reuse-frames'
2124 **** `display-buffer-function'
2125 **** `special-display-buffer-names'
2126 **** `special-display-frame-alist'
2127 **** `special-display-function'
2128 **** `special-display-regexps'
2132 *** `current-time-string' no longer requires that its argument's year
2133 must be in the range 1000..9999. It now works with any year supported
2134 by the underlying C implementation.
2136 *** `current-time' now returns extended-format time stamps
2137 (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2138 PSEC is typically a multiple of 1000 on current machines. Other
2139 functions that use this format, such as `file-attributes' and
2140 `format-time-string', have been changed accordingly. Old-format time
2141 stamps are still accepted.
2143 *** The format of timers in `timer-list' and `timer-idle-list' is now
2144 [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2145 The PSECS slot is new, and uses picosecond resolution. It can be
2146 accessed via the new `timer--psecs' accessor.
2148 *** Last-modified time stamps in undo lists now are of the form
2149 (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2153 *** Improved security when handling persistent objects:
2155 **** `eieio-persistent-read' now features optional arguments for specifying
2156 the class to load, as well as a flag stating whether subclasses are allowed;
2157 if provided, other classes will be rejected by the reader. For
2158 compatibility with existing code, if the class is omitted only a
2161 **** New specialized reader for pulling in classes and signaling errors
2162 without evaluation of suspicious code.
2164 **** All slots that contain objects must have a :type. Slots with lists
2165 of objects must use a new type predicate for a list of an object type.
2167 *** Support for `find-function' and similar utilities, through the addition
2168 of filename support to generated symbols.
2170 ** Floating point functions now always return special values like NaN,
2171 instead of signaling errors, if given invalid args; e.g., (log -1.0).
2172 Previously, they returned NaNs on some platforms but signaled errors
2173 on others. The affected functions are acos, asin, tan, exp, expt,
2174 log, log10, sqrt, and mod.
2176 ** New fringe bitmap `exclamation-mark'.
2178 ** Miscellaneous changes to special forms and macros
2180 *** `defun' and `defmacro' are now macros rather than special forms.
2182 *** `kbd' is now a function rather than a macro.
2184 ** Miscellaneous new functions
2186 *** `set-transient-map' sets up a temporary keymap, active for one key
2187 (and optionally more). This keymap takes precedence over other maps.
2189 *** `autoloadp' tests if its argument is an autoloaded object.
2191 *** `autoload-do-load' performs the autoloading operation.
2193 *** `buffer-narrowed-p' tests if the buffer is narrowed.
2195 *** `file-name-base' returns a file name sans directory and extension.
2197 *** `function-get' fetches a function property, following aliases.
2199 *** `posnp' tests if an object is a `posn'.
2201 *** `system-users' returns the user names on the system.
2203 *** `system-groups' returns the group names on the system.
2205 *** `tty-top-frame' returns the topmost frame of a text terminal.
2207 ** The following functions and variables are obsolete:
2208 *** `automount-dir-prefix' (use `directory-abbrev-alist')
2209 *** `buffer-has-markers-at'
2210 *** `macro-declaration-function' (use `macro-declarations-alist')
2211 *** `window-system-version' (provides no useful information)
2212 *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2213 *** `query-replace-interactive'
2214 *** `font-list-limit' (has had no effect since Emacs < 23)
2217 * Changes in Emacs 24.3 on Non-Free Operating Systems
2219 ** Cygwin builds can use the native MS Windows user interface.
2220 Pass `--with-w32' to configure. The default remains the X11 interface.
2222 ** Two new functions are available in Cygwin builds:
2223 `cygwin-convert-file-name-from-windows' and
2224 `cygwin-convert-file-name-to-windows'. These functions allow Lisp
2225 code to access the Cygwin file-name mapping machinery to convert
2226 between Cygwin and Windows-native file and directory names.
2228 ** When invoked with the -nw switch to run on the Windows text-mode terminal,
2229 Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2230 `mouse-autoselect-window'.
2232 ** On MS Windows Vista and later Emacs now supports symbolic links.
2234 ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2235 support for libxml2, even if its presence is detected.
2237 ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2239 ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2240 directories to the search path. You must add them yourself if you want them.
2243 * Changes in Emacs 24.2
2245 ** This is mainly a bug-fix release.
2248 * Installation Changes in Emacs 24.1
2250 ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2251 to configure. Note that other libraries used by Emacs, RSVG and GConf,
2252 also depend on Gtk+. You can disable them with --without-rsvg and
2255 ** Emacs can be compiled with GnuTLS support.
2256 This happens by default if a suitably recent version of the library is
2257 found at build time. To prevent this, use the configure option
2258 `--without-gnutls'. See below for GnuTLS features.
2260 ** Emacs can be compiled with SELinux support.
2261 This happens by default if a suitably recent version of the library is
2262 found at build time. To prevent this, use the configure option
2263 `--without-selinux'. See below for SELinux features.
2265 ** Emacs can be compiled with ImageMagick support.
2266 This happens by default if a suitably recent version of the library is
2267 found at build time. To prevent this, use the configure option
2268 `--without-imagemagick'. See below for ImageMagick features.
2269 This feature is not available for the Nextstep or MS ports.
2271 ** Emacs can be compiled with libxml2 support.
2272 This happens by default if a suitably recent version of the library is
2273 found at build time. To prevent this, use the configure option
2274 `--without-xml2'. See below for libxml2 features.
2276 ** By default, the installed Info and man pages are compressed.
2277 You can disable this by configuring --without-compress-info.
2279 ** New configure option --with-wide-int.
2280 With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2281 On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2284 ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2285 These provide no new functionality, they just remove the need to edit
2286 lib-src/Makefile by hand in order to use the associated features.
2288 ** New configure option --enable-use-lisp-union-type.
2289 This is only useful for Emacs developers to debug certain types of bugs.
2290 This is not a new feature; only the configure flag is new.
2292 ** The standalone programs digest-doc and sorted-doc are removed.
2293 Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2295 ** The standalone program `fakemail' is removed.
2296 If you need it, feedmail.el provides a superset of the functionality.
2299 * Startup Changes in Emacs 24.1
2301 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2302 command line arguments, and the EMACS_UNIBYTE environment variable, no
2303 longer have any effect. (They were declared obsolete in Emacs 23.)
2305 ** New command line option `--no-site-lisp' removes site-lisp directories
2306 from load-path. -Q now implies this. This option does not affect the
2307 EMACSLOADPATH environment variable (and hence has no effect for
2311 * Changes in Emacs 24.1
2315 *** Many packages now use the `completion-at-point' command,
2316 rather than implementing separate completion commands.
2318 *** `completion-at-point' now handles tags and semantic completion.
2320 *** Completion in a non-minibuffer now tries to detect the end of completion
2321 and pops down the *Completions* buffer accordingly.
2323 *** New option `completion-cycle-threshold' allows completion cycling.
2325 *** New option `completion-category-overrides' for overriding the
2326 default completion style in certain circumstances.
2328 *** New completion style `substring'.
2330 *** Completion of buffer names uses `substring' completion by default.
2332 *** The option `widget-complete-field' has been removed.
2336 *** The first time you try sending mail, Emacs asks for a mail method.
2337 This is implemented by a new default for `send-mail-function', which
2338 is `sendmail-query-once'. This offers to use the smtpmail package, or
2339 to use the old defaults relying on external mail facilities
2340 (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2341 `mailclient-send-it' on Windows).
2343 *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2344 transfers the report to your desktop's preferred mail client, if there
2345 is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2348 *** See Changes in Specialized Modes and Packages for SMTPmail changes
2349 and Mail mode changes
2351 ** Emacs server and client changes
2353 *** New option `server-port' specifies the port for TCP Emacs servers.
2355 *** New emacsclient argument -q/--quiet suppresses some status messages.
2357 *** New emacsclient argument --frame-parameters specifies the frame
2358 parameters of any newly-created graphical frame.
2360 *** If emacsclient shuts down due to Emacs signaling an error,
2361 its exit status is 1.
2363 *** New emacsclient argument --parent-id ID.
2364 This opens a client frame in parent X window ID, via XEmbed, similar
2365 to the --parent-id argument to Emacs.
2367 ** Internationalization changes
2369 *** Emacs now supports display and editing of bidirectional text.
2370 Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2371 displayed in the correct visual order as expected by users of those
2372 scripts. The display reordering is a "full bidirectionality" class
2373 implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2374 with no RTL text should look exactly the same as before.
2376 **** New buffer-local variable `bidi-display-reordering'.
2377 To disable display reordering in a buffer, change this to nil.
2379 **** New buffer-local variable `bidi-paragraph-direction'.
2380 If nil (the default), Emacs determines the base direction of each
2381 paragraph from its text, as specified by the UBA. Setting the value
2382 to `right-to-left' or `left-to-right' forces a base direction on each
2385 Paragraphs with right-to-left base direction are displayed starting at
2386 the right window edge.
2388 *** Enhanced support for characters with no glyphs in available fonts,
2389 or, on text terminals, characters that cannot be encoded by the
2390 terminal coding system. The new option `glyphless-char-display-control'
2391 specifies how to display them: as a hexadecimal code in a box, a thin
2392 1-pixel space, an empty box, etc.
2394 *** New input methods for Farsi and Bulgarian
2395 (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2397 *** `nobreak-char-display' now also highlights Unicode hyphen chars
2398 (U+2010 and U+2011).
2400 *** New Hebrew translation of the Emacs Tutorial.
2401 Type `C-u C-h t' to choose it in case your language setup doesn't
2402 automatically select it.
2404 ** An Emacs Lisp package manager is now included.
2405 This is a convenient way to download and install additional packages,
2406 from a package repository at http://elpa.gnu.org.
2408 *** M-x list-packages shows a list of packages, which can be
2409 selected for installation.
2411 *** New command `describe-package', bound to `C-h P'.
2413 *** By default, all installed packages are loaded automatically when
2414 Emacs starts up. To disable this, set `package-enable-at-startup' to
2415 nil. To specify the packages to load, customize `package-load-list'.
2417 ** Custom theme changes
2419 *** New command `M-x customize-themes', which provides a convenient
2420 interface for enabling and disabling Custom themes.
2422 *** New option `custom-theme-load-path' is the load path for themes.
2423 Emacs no longer looks for Custom themes in `load-path'. The default
2424 value of `custom-theme-load-path' says to look for themes in
2425 `custom-theme-directory', followed by a subdirectory of
2426 `data-directory' named "themes/", which contains a small selection of
2427 built-in Custom themes.
2429 *** New option `custom-safe-themes' records known-safe theme files.
2430 If a theme is not in this list, Emacs queries before loading it, and
2431 offers to save the theme to `custom-safe-themes' automatically. By
2432 default, all themes included in Emacs are treated as safe.
2434 ** Improved GTK integration
2436 *** GTK scroll-bars are now placed on the right by default.
2437 The function `set-scroll-bar-mode' can change this.
2439 *** GTK tool bars can have just text, just images or images and text.
2440 Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2441 the default is taken from desktop settings.
2443 *** GTK tool bars can be placed on any edge of the frame.
2444 The frame-parameter tool-bar-position controls this. It takes the
2445 values top, left, right or bottom. The Options => Show/Hide menu has
2448 *** The default colors for selected text (the `region' face) are taken
2449 from the GTK theme when Emacs is built with GTK.
2451 *** Emacs uses GTK tooltips by default if built with GTK.
2452 You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2454 ** Graphical interface changes
2456 *** On graphical displays, the mode-line no longer ends in dashes.
2457 Also, the first dash (which does not indicate anything) is just
2458 displayed as a space.
2460 *** `menu-bar-select-buffer-function' lets you choose another operation
2461 instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2463 *** Lucid menus and dialogs can display antialiased fonts if Emacs is
2464 built with Xft. These fonts can be set via X resources, for example:
2465 Emacs.pane.menubar.font: Courier-12
2469 *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2470 or if it receives a SIGINT signal in batch mode.
2472 *** `kill-emacs-hook' is now also run in batch mode.
2473 Third-party code which adds to `kill-emacs-hook' should check if they
2474 do the right thing in batch mode.
2476 ** Scrolling changes
2478 *** New scrolling commands `scroll-up-command' and `scroll-down-command'
2479 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2480 of buffer at first key-press (instead they move to top/bottom of buffer)
2481 when `scroll-error-top-bottom' is non-nil.
2483 *** New option `scroll-error-top-bottom' (see above).
2485 *** New scrolling commands `scroll-up-line' and `scroll-down-line'
2486 scroll a line instead of full screen.
2488 *** New property `scroll-command' should be set on a command's symbol to
2489 define it as a scroll command affected by `scroll-preserve-screen-position'.
2491 *** If you customize `scroll-conservatively' to a value greater than 100,
2492 Emacs will never recenter point in the window when it scrolls due to
2493 cursor motion commands or commands that move point (e.f., `M-g M-g').
2494 Previously, you needed to use `most-positive-fixnum' as the value of
2495 `scroll-conservatively' to achieve the same effect.
2497 *** "Aggressive" scrolling now honors the scroll margins.
2498 If you customize `scroll-up-aggressively' or
2499 `scroll-down-aggressively' and move point off the window, Emacs now
2500 scrolls the window so as to avoid positioning point inside the scroll
2503 ** Basic SELinux support has been added.
2504 This requires Emacs to be linked with libselinux at build time.
2506 *** Emacs preserves the SELinux file context when backing up.
2507 Also, the function `copy-file' has an extra optional argument for
2508 preserving SELinux context, and the return value of `backup-buffer'
2509 now includes the SELinux context.
2511 *** New functions `file-selinux-context' and `set-file-selinux-context'
2512 get and set the SELinux context of a file.
2516 *** `delete-by-moving-to-trash' now only affects commands that specify
2517 trashing. This avoids inadvertently trashing temporary files.
2519 *** Calling `delete-file' or `delete-directory' with a prefix argument
2520 now forces true deletion, regardless of `delete-by-moving-to-trash'.
2522 ** File- and directory-local variable changes
2524 *** You can stop directory local vars from applying to subdirectories.
2525 Add an element (subdirs . nil) to the alist portion of any variables
2526 settings to indicate that the section should not apply to
2529 *** Directory local variables can apply to some file-less buffers.
2530 Affected modes include dired, vc-dir, and log-edit. For example,
2531 adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2532 turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2533 `hack-dir-local-variables-non-file-buffer' to support this.
2535 *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2536 Instead, use "eval: (minor-mode 1)".
2538 *** The variable `inhibit-first-line-modes-regexps' has been renamed
2539 to `inhibit-local-variables-regexps'. As the name suggests, it now
2540 applies to ALL file local variables, not just -*- lines. The
2541 associated `inhibit-first-line-modes-suffixes' has been renamed in the
2546 *** The `quit-window' command now restores the last buffer displayed
2547 in the quitted window.
2549 *** Resizing an Emacs frame now preserves proportional window sizes,
2550 modulo restrictions like window minimum sizes and fixed-size windows.
2552 *** The behavior of `display-buffer' is now customizable in detail.
2554 **** New option `display-buffer-base-action' specifies a list of
2555 user-determined display "actions" (functions and optional arguments
2556 for choosing the displaying window).
2558 This takes precedence over the default display action, which is
2559 specified by `display-buffer-fallback-action'.
2561 **** New option `display-buffer-alist' maps buffer name regexps to
2562 display actions, taking precedence over `display-buffer-base-action'.
2564 *** New option `window-combination-limit'.
2565 The new option `window-combination-limit' allows to return the space
2566 obtained for resizing or creating a window more reliably to the window
2567 from which such space was obtained.
2569 *** New option `window-combination-resize'.
2570 The new option `window-combination-resize' allows to split a window that
2571 otherwise cannot be split because it's too small by stealing space from
2572 other windows in the same combination. Subsequent resizing or deletion
2573 of the window will resize all windows in the same combination as well.
2575 *** New option `frame-auto-hide-function' lets you choose between
2576 iconifying or deleting a frame when burying a buffer in a dedicated
2577 frame, or quitting a window showing a buffer in a frame of its own.
2579 *** New commands `maximize-window' and `minimize-window'.
2580 These maximize and minimize the size of a window within its frame.
2582 *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2583 These functions allow to navigate through the live buffers that have
2584 been shown in a specific window.
2586 ** Minibuffer changes
2588 *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2589 This is handy for minibuffer-only frames, and is also used for the feature
2590 where mouse-1 pops up *Messages*"', which can now easily be changed.
2592 *** Minibuffers set `truncate-lines' to nil.
2593 If you want to change the value to something else, you could use
2594 for example `minibuffer-setup-hook'.
2596 ** `auto-mode-case-fold' is now enabled by default.
2598 ** `backup-by-copying-when-mismatch' now defaults to t.
2600 ** New basic faces `error', `warning', `success'.
2601 These are used to highlight text indicating failure, caution or
2602 successful operation.
2604 ** New option `list-colors-sort' defines the color sort order
2605 for `list-colors-display'.
2607 ** The variable `focus-follows-mouse' now always defaults to nil.
2610 * Editing Changes in Emacs 24.1
2614 *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2615 `isearch-yank-line'.
2617 *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2618 `isearch-yank-kill'.
2620 *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2622 ** New commands `count-words-region' and `count-words'.
2624 *** M-= is bound to `count-words-region', not `count-lines-region'.
2625 The `count-words-region' command, when called interactively, reports
2626 the number of lines, words, and characters in the region. It is a
2627 superset of the old `count-lines-region', which is now an obsolete
2630 ** The command `just-one-space' (M-SPC), if given a negative argument,
2631 also deletes newlines around point.
2635 *** New option `delete-active-region'.
2636 If non-nil, [delete] and DEL delete the region if it is active and no
2637 prefix argument is given. If set to `kill', those commands kill
2640 *** New command `delete-forward-char', bound to [delete].
2641 This is meant for interactive use, and obeys `delete-active-region'.
2642 The command `delete-char' does not obey `delete-active-region'.
2644 *** `delete-backward-char' is now a Lisp function.
2645 Apart from obeying `delete-active-region', its behavior is unchanged.
2646 However, the byte compiler now warns if it is called from Lisp; Lisp
2647 callers should use delete-char with a negative argument instead.
2649 *** The option `mouse-region-delete-keys' has been deleted.
2651 ** Selection changes.
2653 The default handling of clipboard and primary selections has been
2654 changed to conform with modern X applications. In short, most
2655 commands for killing and yanking text now use the clipboard, while
2656 mouse commands use the primary selection.
2658 In the following, we provide a list of these changes, followed by a
2659 list of steps to get the old behavior back if you prefer that.
2661 *** `select-active-regions' now defaults to t.
2662 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2663 the kill ring. The selected text is put in the primary selection, if
2664 the system possesses a separate primary selection facility (e.g. X).
2666 **** `select-active-regions' also accepts a new value, `only'.
2667 This means to only set the primary selection for temporarily active
2668 regions (usually made by mouse-dragging or shift-selection);
2669 "ordinary" active regions, such as those made with C-SPC followed by
2670 point motion, do not alter the primary selection.
2672 **** `mouse-drag-copy-region' now defaults to nil.
2674 *** mouse-2 is now bound to `mouse-yank-primary'.
2675 This pastes from the primary selection, ignoring the kill-ring.
2676 Previously, mouse-2 was bound to `mouse-yank-at-click'.
2678 *** `x-select-enable-clipboard' now defaults to t on all platforms.
2680 *** `x-select-enable-primary' now defaults to nil.
2681 Thus, commands that kill text or copy it to the kill-ring (such as
2682 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2684 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2685 exactly equivalent to M-w, C-w, and C-y respectively.
2687 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
2688 non-nil by default, as Windows does not support the primary selection
2689 between applications.
2691 *** To return to the previous behavior, do the following:
2693 **** Change `select-active-regions' to nil.
2694 **** Change `mouse-drag-copy-region' to t.
2695 **** Change `x-select-enable-primary' to t (on X only).
2696 **** Change `x-select-enable-clipboard' to nil.
2697 **** Bind `mouse-yank-at-click' to mouse-2.
2699 *** Support for X cut buffers has been removed.
2701 *** X clipboard managers are now supported.
2702 To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2704 ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2705 in the current rectangle. With a prefix argument, this prompts for a
2706 number to count from and for a format string.
2708 ** `redisplay-dont-pause' now defaults to t.
2709 This makes Emacs feel more responsive to editing commands that arrive
2710 at high rate, e.g. if you lean on some key, because stopping redisplay
2711 in the middle (when this variable is nil) forces more expensive
2712 updates later on, and Emacs appears to be unable to keep up.
2714 ** The behavior of <TAB> for active regions in Text mode has changed.
2715 In Text and related modes, typing <TAB> (`indent-for-tab-command')
2716 when the region is active causes Emacs to indent all the lines in the
2717 region, aligning them with the line previous to the first line in the
2718 region (or with the left margin if there is no previous line).
2720 ** When `occur' is called with a prefix argument, matching strings are
2721 collected into the `*Occur*' buffer without line numbers. If there
2722 are parenthesized subexpressions in the specified regexp, `occur'
2723 reads replacement text that may contain \\& and \\N whose convention
2724 follows `replace-match'.
2727 * Changes in Specialized Modes and Packages in Emacs 24.1
2729 ** Archive Mode has basic support for browsing and updating 7z archives.
2733 *** BibTeX mode now supports biblatex.
2734 Use the variable `bibtex-dialect' to select different BibTeX dialects.
2735 `bibtex-entry-field-alist' is now an obsolete alias for
2736 `bibtex-BibTeX-entry-alist'.
2738 *** New command `bibtex-search-entries', bound to C-c C-a.
2740 *** New `bibtex-entry-format' option `sort-fields', disabled by default.
2742 *** New variable `bibtex-search-entry-globally'.
2746 *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2748 *** The default browser used by the package is now the "xdg-open" program,
2749 on platforms that support it. This calls your desktop's preferred browser.
2753 *** Support for musical notes.
2755 *** Support for logarithmic units.
2757 *** No longer uses the tex prefix for TeX specific unit names when
2758 using TeX or LaTeX mode.
2760 *** New option to highlight selections using faces.
2762 *** `calc-histogram' has the option of using a vector to determine the bins.
2764 *** New "O" option prefix.
2766 *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2768 ** Calendar, Diary, and Appt
2770 *** Diary entries can contain non-printing "comments".
2771 See the variable `diary-comment-start'.
2773 *** Appointments can specify their individual warning times.
2774 See the variable `appt-warning-time-regexp'.
2776 *** The function specified by `appt-disp-window-function' may be passed
2777 lists of arguments if multiple appointments are due at similar times.
2778 If you are using a custom function for this, you should update it.
2780 *** New function `diary-hebrew-birthday'.
2782 *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2783 may no longer be nil, but must all be strings.
2785 *** The obsolete (since Emacs 22.1) method of enabling the appt
2786 package by adding `appt-make-list' to `diary-hook' has been removed.
2787 Use `appt-activate' instead.
2789 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
2790 appt-issue-message (use the function appt-activate)
2791 appt-visible/appt-msg-window (use the variable appt-display-format)
2793 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2794 view-diary-entries, list-diary-entries, show-all-diary-entries
2798 *** New feature to "guess" the style in an existing buffer.
2799 The main entry point is M-x c-guess.
2801 *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2803 *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2804 Thus C-M-a will, by default, go to the beginning of the immediate function,
2807 *** "Macros with semicolons" can be registered for correct indentation.
2808 Where such a macro ends a line (no semicolon) the next statement is no longer
2809 parsed as a statement continuation.
2811 ** Comint and modes derived from it use the standard completion code.
2815 *** Compilation mode can be used without Font Lock mode.
2816 `compilation-parse-errors-function' is now obsolete.
2818 *** New variable `compilation-filter-start', which is bound while
2819 `compilation-filter-hook' runs. It records the start position of the
2820 text inserted by `compilation-filter'.
2822 *** `compilation-error-screen-columns' and `compilation-first-column'
2823 are obeyed in the editing buffer. So programming language modes can
2824 set them, whereas previously only the value in the *Compilation*
2829 *** Customize buffers now contain a search field.
2830 The search is performed using `customize-apropos'.
2831 To turn off the search field, set `custom-search-field' to nil.
2833 *** Options in customize group buffers start out hidden if not customized.
2834 Use the arrow to the left of the option name to toggle visibility.
2836 *** custom-buffer-sort-alphabetically now defaults to t.
2838 *** The color widget now has a "Choose" button, which allows you to
2839 choose a color via `list-colors-display'.
2843 *** It is now possible to access buses other than the default system
2846 *** The `dbus-register-method' and `dbus-register-property' functions
2847 optionally do not register names.
2849 *** The new function `dbus-register-service' registers a known service
2850 name on a D-Bus without also registering a property or a method.
2854 *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2855 if called with a prefix argument, read a file name from the minibuffer
2856 instead of using the current buffer.
2858 *** The "dired local variables" feature of Dired-x is obsolete.
2859 The standard directory local variables feature replaces it.
2863 *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2864 controlling attempts to autojoin a channel.
2866 *** New variable `erc-coding-system-precedence': If we use `undecided'
2867 as the server coding system, this variable will then be consulted.
2868 The default is to decode strings that can be decoded as utf-8 as
2869 utf-8, and do the normal `undecided' decoding for the rest.
2873 *** The default value of `eshell-directory-name' has changed
2874 to be an "eshell" directory in `user-emacs-directory'.
2875 The old "~/.eshell/" directory is still used if it exists, though.
2879 *** The M-x gdb command now uses the GDB Machine Interface protocol.
2880 It now supports multithread non-stop debugging and simultaneous
2881 debugging of several threads.
2885 *** RET (`image-toggle-animation') toggles animation, if applicable.
2886 Animation plays once, unless the option `image-animate-loop' is non-nil.
2890 *** New command M-x info-display-manual displays a named Info manual.
2891 If that manual is already visited in some Info buffer, it displays
2892 that buffer. (This is handy if you have many manuals in many *info*
2893 buffers, and don't remember the name of the buffer visiting the manual
2894 you want to consult.) Otherwise, it loads and displays the manual.
2896 *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2897 This is for compatibility with the stand-alone Info reader program,
2898 and also because `Info-edit' is a rarely used command that is disabled
2901 ** Mail mode changes (not Message mode)
2903 *** New command M-x mail-add-attachment for adding MIME attachments
2905 *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2906 (Its name is misleading, since it has nothing to do with MIME
2907 attachments.) The old name is now an obsolete alias to the new name.
2909 ** MH-E has been updated to MH-E version 8.3.1.
2910 See MH-E-NEWS for details.
2912 ** Modula-2 mode provides auto-indentation.
2914 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
2916 ** nXML mode no longer binds C-RET to `nxml-complete'.
2917 Completion is now performed via `completion-at-point', bound to C-M-i
2918 or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2919 default), this performs tag completion.
2921 ** Org mode has been updated to version 7.8.09.
2922 See ORG-NEWS for details.
2924 ** Prolog mode has been completely revamped, with lots of additional
2925 functionality such as more intelligent indentation, electricity,
2926 support for more variants, including Mercury, and a lot more.
2930 *** The command `rmail-epa-decrypt' decrypts OpenPGP data
2931 in the Rmail incoming message.
2933 *** The variable `rmail-message-filter' no longer has any effect.
2934 This change was made in Emacs 23.1 but was not advertised at the time.
2935 Try using `rmail-show-message-hook' instead.
2939 *** M-x shell prompts for the shell path name if the default directory
2940 is a remote file name and neither the environment variable $ESHELL nor
2941 the variable `explicit-shell-file-name' is set.
2943 *** TAB is now bound to the standard `completion-at-point' command,
2944 which now implements the pcomplete rules for shell command completion.
2948 *** SMTPmail now uses encrypted connections (via STARTTLS) by default
2949 if the mail server supports them. This uses either built-in GnuTLS
2950 support, or the starttls.el library. Customize `smtpmail-stream-type'
2953 *** The variable `smtpmail-auth-credentials' has been removed.
2954 By default, the information is now stored in the file ~/.authinfo.
2955 This was the default value of smtpmail-auth-credentials. If you had
2956 customized smtpmail-auth-credentials to a list of user names and
2957 passwords, those settings are not used. During your first connection
2958 to the smtp server, Emacs will prompt for the user name and password,
2959 and offer to save them to ~/.authinfo. Or you can manually copy the
2960 credentials to ~/.authinfo. For example, if you had
2962 (setq smtpmail-auth-credentials
2963 '(("mail.example.org" 25 "jim" "s!cret")))
2965 then the equivalent line in ~/.authinfo would be
2967 machine mail.example.org port 25 login jim password s!cret
2969 See the auth-source manual for more information, e.g. on encrypting
2970 the credentials file.
2972 *** The variable `smtpmail-starttls-credentials' has been removed.
2973 If you had that set, you need to put
2975 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2977 in your ~/.authinfo file instead.
2979 *** SMTPmail defaults to using the address in the From: header as the
2980 SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2981 to the address you wish to use instead.
2985 *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2986 and `sql-oracle-scan-on'.
2988 *** New options controlling prompting for login parameters.
2989 Each supported product has a custom variable `sql-*-login-params',
2990 which is a list of the parameters to be prompted for before a
2991 connection is established.
2993 *** The command `sql-product-interactive' now takes a prefix argument,
2994 which causes it to prompt for an SQL product.
2996 *** Product-specific SQL interactive commands now take prefix arguments.
2997 These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2998 given a prefix argument, prompt for a name for the SQL interactive
2999 buffer. This reduces the need for calling `sql-rename-buffer'.
3001 *** SQL interactive modes suppress command continuation prompts, and
3002 replace tabs with spaces. The first change impacts multiple line SQL
3003 statements entered with C-j between each line, statements yanked into
3004 the buffer and statements sent with `sql-send-*' functions. The
3005 second prevents the MySQL and Postgres interpreters from listing
3006 object name completions when sent text via `sql-send-*' functions.
3008 *** New command `sql-connect' starts a predefined SQLi session,
3009 using the login parameters from `sql-connection-alist'.
3011 *** New "Save Connection" menu item in SQLi buffers.
3012 This gathers the login params specified for the SQLi session, if it
3013 was not started by a connection, and saves them as a new connection.
3015 *** New commands for listing database objects and details:
3016 sql-list-all and sql-list-table.
3018 *** An API for manipulating SQL product definitions has been added.
3022 *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3026 *** New inline access method "ksu" (kerberized su).
3028 *** The following access methods are discontinued: "ssh1_old",
3029 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3031 *** The user option `remote-file-name-inhibit-cache' controls whether
3032 remote file attributes are cached for better performance.
3034 *** The option `ange-ftp-binary-file-name-regexp' has changed its
3035 default value to "".
3037 *** Handlers for `file-selinux-context' and `set-file-selinux-context'
3038 for remote machines which support SELinux.
3040 ** New function `url-queue-retrieve', which behaves like url-retrieve,
3041 but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3042 the degree of parallelism.
3044 ** VC and related modes
3046 *** Support for pulling on distributed version control systems.
3047 The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3048 supported (currently with Bzr, Git, and Mercurial), to update the
3049 current branch and working tree. A prefix argument means to prompt
3050 the user for specifics, e.g. a pull location.
3052 *** `vc-update' is now an alias for `vc-pull'.
3054 *** Support for merging on distributed version control systems.
3055 The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3056 is supported (currently with Bzr, Git, and Mercurial), to merge
3057 changes from another branch into the current one. It prompts for
3058 specifics, e.g. a merge source.
3060 *** New option `vc-revert-show-diff' controls whether `vc-revert'
3061 shows a diff while querying the user. It defaults to t.
3063 *** Log entries in some Log View buffers can be toggled to display a
3064 longer description by typing RET (log-view-toggle-entry-display).
3065 This is currently supported for Bzr, Git, and Mercurial (to support
3066 another backend, define a `log-view-expanded-log-entry-function').
3067 In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3068 use this to display the full log entry for the revision at point.
3070 *** New command `vc-ediff' allows visual comparison of two revisions
3071 of a file similar to `vc-diff', but using ediff backend.
3073 *** The option `vc-initial-comment' was removed in Emacs 23.2, but
3074 this was not advertised at the time.
3076 *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3077 Since Emacs 23, it has done the same thing as `toggle-read-only', but
3078 this was not advertised at the time.
3084 *** erc-hecomplete.el (use erc-pcomplete.el instead)
3086 *** partial-completion-mode (complete.el) is obsolete.
3087 You can get a comparable behavior with:
3088 (setq completion-styles '(partial-completion initials))
3089 (setq completion-pcm-complete-word-inserts-delimiters t)
3091 *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3093 *** pgg is obsolete (use EasyPG instead).
3095 *** sregex.el is obsolete, since rx.el is a strict superset.
3097 *** s-region.el and pc-select.el are obsolete.
3098 They are superseded by shift-select-mode, enabled by default since 23.1.
3100 *** vc-mcvs.el is obsolete (for lack of a maintainer).
3104 *** The Landmark game is now invoked with `landmark', not `lm'.
3105 Its functions and variables have been similarly renamed.
3107 *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3108 (This interfered with cua-mode.)
3110 *** f90.el has some support for Fortran 2008 syntax.
3112 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
3114 *** New command `nato-region' converts text to NATO phonetic alphabet.
3117 * New Modes and Packages in Emacs 24.1
3119 ** Occur Edit mode applies edits made in *Occur* buffers to the
3120 original buffers. It is bound to "e" in Occur mode.
3122 ** New global minor mode electric-pair-mode.
3123 When enabled, typing an open parenthesis automatically inserts the
3124 matching closing one.
3126 ** New global minor mode electric-indent-mode.
3127 When enabled, typing certain characters triggers reindentation.
3128 Major modes wishing to use this can set electric-indent-chars or
3129 electric-indent-functions.
3131 ** New global minor mode electric-layout-mode.
3132 When enabled, typing certain characters automatically inserts newlines.
3133 Major modes wishing to use this can set electric-layout-rules.
3135 ** tabulated-list.el provides a generic major mode for tabulated data,
3136 from which other modes can be derived.
3138 ** pcase.el provides the ML-style pattern matching macro `pcase'.
3140 ** secrets.el is an implementation of the Secret Service API, an
3141 interface to password managers like GNOME Keyring or KDE Wallet. The
3142 Secret Service API requires D-Bus for communication. The command
3143 `secrets-show-secrets' offers a buffer with a visualization of the
3146 ** notifications.el provides an implementation of the Desktop
3147 Notifications API. It requires D-Bus for communication.
3149 ** soap-client.el supports access to SOAP web services from Emacs.
3150 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3152 ** New generic mode, xmodmap-generic-mode, for xmodmap files.
3154 ** New emacs-lock.el package.
3155 The previous version has been moved to obsolete/old-emacs-lock.el.
3156 Now, there is a proper minor mode `emacs-lock-mode'. Protection
3157 against exiting Emacs and killing the buffer can be set separately.
3158 The mechanism for automatically turning off protection for buffers
3159 with dead inferior processes has been generalized.
3162 * Incompatible Lisp Changes in Emacs 24.1
3164 ** Passing a nil argument to a minor mode function call now ENABLES
3165 the minor mode unconditionally. This is so that you can write e.g.
3167 (add-hook 'text-mode-hook 'foo-mode)
3169 to enable foo-mode in Text mode buffers, removing the need for
3170 `turn-on-foo-mode' style functions. This affects all mode commands
3171 defined by `define-minor-mode'. If called interactively, the mode
3172 command still toggles the minor mode.
3174 ** The return value of `backup-buffer' has changed.
3175 It is now a list of three elements, where the second element is a list
3176 describing the original file's SELinux context. If Emacs or the
3177 system lacks SELinux support, the context list is (nil nil nil nil).
3178 See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3180 ** `char-direction-table' and the `char-direction' function were deleted.
3181 They were buggy and inferior to the new support of bidirectional
3182 editing introduced in Emacs 24. If you need the bidirectional
3183 properties of a character, use `get-char-code-property' with the last
3184 argument `bidi-class'.
3186 ** `copy-directory' now copies the source directory as a subdirectory
3187 of the target directory, if the latter is an existing directory. The
3188 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3189 the contents directly into a pre-existing target directory.
3191 ** For mouse click input events in the text area, the Y pixel
3192 coordinate in the POSITION list now counts from the top of the text
3193 area, excluding any header line. Previously, it counted from the top
3196 ** Support for "old-style" backquotes, obsolete for 10+ years, has
3197 been further reduced. Now a backquote not followed by a space is
3198 always treated as a "new-style" backquote. Please remove all
3199 "old-style" backquotes from your code. If your code uses backquotes
3200 as documented in the Elisp manual, and compiles without warning, then
3201 you have nothing to do in this regard. Code not following the
3202 appropriate conventions may fail to compile.
3204 The most common cause of trouble seems to be an old-style backquote
3205 followed by a newline. Another cause of trouble is vector notation
3206 for key sequence notation: instead of [(control ,)] and [(control ')],
3207 you should write [(control ?,)] and [(control ?')], which will work in
3210 ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3211 was not advertised at the time. The function `custom-initialize-delay'
3212 replaced all known uses.
3214 ** `view-buffer' now treats special mode-class in the same way that
3215 `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3216 major mode is special).
3218 ** Menu and tool bar changes
3220 *** During startup, Emacs no longer adds entries for `menu-bar-lines'
3221 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3222 With these alist entries omitted, `make-frame' checks the value of the
3223 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3224 a menu-bar or tool-bar, respectively. If the alist entries are added,
3225 they override the value of `menu-bar-mode'/`tool-bar-mode'.
3227 *** The menu bar bindings's caches are not used any more.
3228 Use (where-is-internal <def> nil t) instead.
3230 ** Regions created by mouse dragging are now normal active regions,
3231 similar to those created by shift-selection (see Selection changes
3232 above). In previous Emacs versions, these regions were delineated by
3233 `mouse-drag-overlay'; that variable has been removed.
3235 ** The fourth argument of `filter-buffer-substring' has been removed.
3236 If you want to remove text properties from the final result, simply
3237 pass the result through substring-no-properties.
3239 ** cl.el no longer provides `cl-19'.
3241 ** The following obsolete functions and aliases have been removed
3242 (the appropriate new function is given in parentheses; "not needed"
3243 means you can just remove all calls to the function in question):
3245 *** `comint-kill-output' (`comint-delete-output')
3246 *** `decompose-composite-char' (`char-to-string')
3247 *** `outline-visible' (`outline-invisible-p')
3248 *** `internal-find-face' (`facep')
3249 *** `internal-get-face' (`facep and check-face')
3250 *** `frame-update-faces' (not needed)
3251 *** `frame-update-face-colors' (`frame-set-background-mode')
3252 *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3253 *** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
3254 *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3255 *** `x-make-font-bold-italic' (`make-face-bold-italic')
3256 *** `x-make-font-unbold' (`make-face-unbold')
3257 *** `x-make-font-unitalic' (`make-face-unitalic')
3258 *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3259 *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3260 *** `iswitchb-default-keybindings' (`iswitchb-mode')
3261 *** `char-bytes' (== 1)
3262 *** `isearch-return-char' (`isearch-printing-char')
3263 *** `make-local-hook' (not needed)
3264 *** `set-screen-height' (`set-frame-height')
3265 *** `set-screen-width' (`set-frame-width')
3267 ** The following obsolete variables and varaliases have been removed
3268 (the appropriate new variable is given in parentheses):
3270 *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3271 *** `vc-header-alist' (`vc-BACKEND-header')
3272 *** `directory-sep-char' (== ?/)
3273 *** `font-lock-defaults-alist' (`font-lock-defaults')
3274 *** `e' (`float-e').
3276 ** The following obsolete files were removed:
3277 sc.el, x-menu.el, rnews.el, rnewspost.el
3279 ** The format of the finder-inf.el file has changed, since the Finder
3280 mechanism is now based on the package system. The variable
3281 `finder-package-info' is replaced by `package--builtins' and
3282 `finder-keywords-hash'.
3284 ** When generating autoloads, `update-directory-autoloads' no longer
3285 assumes every inspected file is in your `load-path'. It instead
3286 generates relative names according to the current `load-path'.
3289 * Lisp Changes in Emacs 24.1
3291 ** Code can now use lexical scoping by default instead of dynamic scoping.
3292 The `lexical-binding' variable enables lexical scoping for local
3293 variables. It is typically set via a file-local variable in the first
3294 line of the file, in which case it applies to all the code in that
3297 *** `eval' takes a new optional argument `lexical' to choose the new lexical
3298 binding instead of the old dynamic binding mode.
3300 *** Lexically scoped interpreted functions are represented with a new form
3301 of function value which looks like (closure ENV ARGS &rest BODY).
3303 *** New macro `letrec' to define recursive local functions.
3305 *** `defvar' and `defconst' now mark the variable as special (dynamic).
3306 So do `defcustom' and other forms that call `defvar' as a subroutine.
3308 *** New function `special-variable-p' to check whether a variable is
3309 declared as dynamically bound.
3311 *** The form ((lambda ...) ...) is deprecated.
3313 ** An Emacs Lisp testing tool is now included.
3314 Emacs Lisp developers can use this tool to write automated tests for
3315 their code. See the ERT info manual for details.
3317 ** Changes for bidirectional display and editing
3319 *** New function `current-bidi-paragraph-direction'.
3320 This returns the base direction of the paragraph at point.
3322 *** New function `bidi-string-mark-left-to-right'.
3323 Given a string containing characters from right-to-left scripts, this
3324 function returns another string which can be safely inserted into a
3325 buffer, such that any following text will be always displayed to the
3326 right of that string. (This works by appending an invisible Unicode
3327 "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3329 This is useful when the buffer has overall left-to-right paragraph
3330 direction and you need to insert a string whose contents are not known
3331 in advance, without disrupting the layout of the line.
3335 *** Window tree functions are accessible in Elisp.
3336 Functions are provided to return the parent, siblings or child windows
3337 of any window including internal windows (windows not associated with a
3338 buffer) in the window tree.
3340 **** New function `window-valid-p' gives non-nil for live and internal
3343 **** Window manipulation can deal with internal windows.
3344 Many window handling functions like `split-window', `delete-window', or
3345 `delete-other-windows' as well as the window resizing functions can now
3346 act on any window including internal ones.
3348 *** window-total-height/-width vs window-body-height/-width.
3349 The function `window-height' has been renamed to `window-total-height'
3350 and `window-width' has been renamed to `window-body-width'. The old
3351 names are provided as aliases. Two new functions `window-total-width'
3352 and `window-body-height' are provided.
3354 *** Window parameters specific to window handling functions.
3355 For each window you can specify a parameter to override the default
3356 behavior of a number of functions like `split-window', `delete-window'
3357 and `delete-other-windows'. The variable `ignore-window-parameters'
3358 allows to ignore processing such parameters.
3360 *** New semantics of third argument of `split-window'.
3361 The third argument of `split-window' has been renamed to SIDE and can be
3362 set to any of the values 'below, 'right, 'above, or 'left to make the
3363 new window appear on the corresponding side of the window that shall be
3364 split. Any other value of SIDE will cause `split-window' to split the
3365 window into two side-by-side windows as before.
3367 *** Window resizing functions.
3368 A new standard function for resizing windows called `window-resize' has
3369 been introduced. This and all other functions for resizing windows no
3370 longer delete any windows when they become too small.
3372 *** Deleting the selected window now selects the most recently selected
3373 live window on that frame instead.
3375 *** `adjust-window-trailing-edge' adjustments.
3376 `adjust-window-trailing-edge' can now deal with fixed-size windows and
3377 is able to resize other windows if a window adjacent to the trailing
3378 edge cannot be shrunk any more. This makes its behavior more similar to
3379 that of Emacs 21 without compromising, however, its inability to delete
3380 windows which was introduced in Emacs 22.
3382 *** Window-local buffer lists.
3383 Windows now have local buffer lists. This means that removing a buffer
3384 from display in a window will preferably show the buffer previously
3385 shown in that window with its previous window-start and window-point
3386 positions. This also means that the same buffer may be automatically
3387 shown twice even if it already appears in another window.
3389 *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3390 which if non-nil requires the buffer to be displayed in the currently
3391 selected window, signaling an error otherwise. If nil, another window
3392 can be used, e.g. if the selected one is strongly dedicated.
3394 *** `split-window-vertically' and `split-window-horizontally' renamed
3395 to `split-window-below' and `split-window-right' respectively.
3396 The old names are kept as aliases.
3400 **** The second arg to `display-buffer' and `pop-to-buffer' is now
3401 named ACTION, and takes a display action of the same form as
3402 `display-buffer-base-action' (see Changes, above). A non-nil,
3403 non-list value is treated specially, as the old meaning.
3405 **** New variable `display-buffer-overriding-action'.
3407 **** The procedure of `display-buffer' etc. to choose a window is
3408 determined by combining `display-buffer-overriding-action',
3409 `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3410 and `display-buffer-fallback-action'. The second and fourth of these
3411 are user-customizable variables.
3413 See the docstring of `display-buffer' for details.
3415 *** New functions `window-state-get' and `window-state-put'.
3416 These functions allow to save and restore the state of an arbitrary
3417 frame or window as an Elisp object.
3421 *** New variable `completion-extra-properties' used to specify extra
3422 properties of the current completion:
3423 - :annotate-function, same as the old completion-annotate-function.
3424 - :exit-function, function to call after completion took place.
3426 *** Functions on `completion-at-point-functions' can return any of the
3427 properties valid for `completion-extra-properties'.
3429 *** `completion-annotate-function' is obsolete.
3431 *** New `metadata' method for completion tables. The metadata thus returned
3432 can specify various details of the data returned by `all-completions':
3433 - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3434 used to select a style in completion-category-overrides.
3435 - `annotation-function' to add annotations in *Completions*.
3436 - `display-sort-function' to specify how to sort entries in *Completions*.
3437 - `cycle-sort-function' to specify how to sort entries when cycling.
3439 *** `minibuffer-local-filename-must-match-map' is not used any more.
3440 Instead, the bindings in `minibuffer-local-filename-completion-map'
3441 are combined with `minibuffer-local-must-match-map'.
3443 *** New variable `completing-read-function' allows overriding the
3444 behavior of `completing-read'.
3446 ** `glyphless-char-display' can now distinguish between graphical and
3447 text terminal display, via a char-table entry that is a cons cell.
3449 ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3450 Instead, the offending function is removed.
3454 *** New function `run-hook-wrapped' for running an abnormal hook by
3455 passing the hook functions as arguments to a "wrapping" function.
3456 Like `run-hook-with-args-until-success', it stops at the first
3457 non-nil return value.
3459 *** New macro `with-wrapper-hook' for running an abnormal hook as a
3460 set of "wrapping" filters, similar to around advice.
3461 (A version of this macro was actually added in Emacs 23.2 but was not
3462 advertised at the time.)
3466 *** New macro `condition-case-unless-debug' (this was actually added in
3467 Emacs 23.1 as condition-case-no-debug, but not advertised)
3469 *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3471 *** Variable `stack-trace-on-error' removed.
3473 *** The debugger can now "continue" from an error, which means it will
3474 jump to the error handler as if the debugger had not been invoked
3475 instead of jumping all the way to the top-level.
3477 *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3478 This can be useful when `inhibit-quit' is set.
3480 ** The new function `server-eval-at' allows evaluation of Lisp forms on
3481 named Emacs server instances.
3483 ** `call-process' and `call-process-region' allow a `(:file "file")' spec
3484 to redirect STDOUT to a file.
3486 ** The function `format-time-string' now supports the %N directive,
3487 for higher-resolution time stamps.
3489 ** New input reading functions
3491 *** New function `read-char-choice' reads a restricted set of
3492 characters, discarding any inputs not inside the set.
3494 *** The command `read-color' now requires a match for a color name
3495 or RGB triplet, instead of signaling an error if the user provides
3498 **** `facemenu-read-color' is now an alias for `read-color'.
3500 ** `image-library-alist' is renamed to `dynamic-library-alist'.
3501 The variable is now used to load all kind of supported dynamic libraries,
3502 not just image libraries. The previous name is still available as an
3505 ** Syntax parsing changes
3507 *** New variable `syntax-propertize-function'.
3508 This replaces `font-lock-syntactic-keywords' which is now obsolete.
3509 This allows syntax-table properties to be set independently from font-lock:
3510 just call syntax-propertize to make sure the text is propertized.
3511 Together with this new variable come a new hook
3512 syntax-propertize-extend-region-functions, as well as two helper functions:
3513 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3514 as-is; and syntax-propertize-rules which provides a new way to specify
3517 *** Syntax tables support a new "comment style c" additionally to style b.
3519 ** New hook `post-self-insert-hook', run after `self-insert-command'.
3521 ** frame-local variables cannot be let-bound any more.
3523 ** Major and minor mode changes
3525 *** `set-auto-mode' now respects mode: local variables at the end of files,
3526 as well as those in the -*- line.
3528 *** `prog-mode' is a new major mode from which programming modes
3531 **** `prog-mode-hook' can be used to enable features for programming
3532 modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3533 on-the-fly spell checking for comments and strings.
3535 **** New minor modes `prettify-symbols-mode' and
3536 `global-prettify-symbols-mode' let the user enable symbol
3537 prettification (replacing a string like "lambda" with the Greek lambda
3540 *** New hook `change-major-mode-after-body-hook', run by
3541 `run-mode-hooks' just before any other mode hooks.
3543 *** Enabled globalized minor modes can be disabled in specific major modes.
3544 If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3545 major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3547 *** `define-minor-mode' accepts new keywords :variable, :after-hook.
3549 ** File-handling changes
3551 *** `delete-file' and `delete-directory' now accept optional arg TRASH.
3552 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3553 both non-nil. Interactively, TRASH defaults to t, unless a prefix
3554 argument is supplied (see Trash changes, above).
3556 *** New file predicates: `file-equal-p', `file-in-directory-p'.
3558 ** Tool-bars can display separators.
3559 Tool-bar separators are handled like menu separators in menu-bar maps,
3560 i.e. via menu entries of the form `(menu-item "--")'.
3564 *** Animated images support (currently animated gifs only).
3566 **** `image-animated-p' returns non-nil if an image can be animated.
3568 **** `image-animate' animates a supplied image spec.
3570 **** `image-animate-timer' returns the timer object for an image that
3573 *** `image-extension-data' has been renamed to `image-metadata'.
3574 The old name is an obsolete alias to the new one.
3576 *** Image mode can view any image type that ImageMagick supports.
3577 This requires Emacs to be built with ImageMagick support.
3579 **** New function `imagemagick-types', defined if ImageMagick support
3580 is enabled, returns a list of image file extensions that your
3581 ImageMagick installation supports.
3583 **** New function `imagemagick-register-types' enables ImageMagick
3584 image types in Image mode and in `create-image' and other helper
3587 **** New option `imagemagick-types-inhibit' excludes certain
3588 ImageMagick image types from `imagemagick-register-types'.
3590 **** With ImageMagick support, there are extra Image mode commands to
3591 resize and rotate images: `image-transform-fit-to-height',
3592 `image-transform-fit-to-width', `image-transform-set-rotation', and
3593 `image-transform-set-scale'.
3595 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3596 passes it to the mail user agent function. This argument specifies an
3597 action for returning to the caller after finishing with the mail. For
3598 example, this is used by Rmail to optionally delete a mail window.
3600 ** XML and HTML parsing
3601 If Emacs is compiled with libxml2 support, there are two new
3602 functions: `libxml-parse-html-region' (which parses "real world" HTML)
3603 and `libxml-parse-xml-region' (which parses XML). Both return an
3604 Emacs Lisp parse tree.
3606 ** Networking and encryption changes
3608 *** `open-network-stream' can now be used to open an encrypted stream.
3609 It now accepts an optional `:type' parameter for initiating a TLS
3610 connection, directly or via STARTTLS. To do STARTTLS, additional
3611 parameters (`:end-of-command', `:success', `:capabilities-command')
3612 must also be supplied.
3614 *** New library gnutls.el.
3615 The new function `gnutls-available-p' returns non-nil if Emacs is
3616 built with GnuTLS support. The main entry points are
3617 `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3618 these functions through `open-network-stream', because that can
3619 upgrade connections through STARTTLS opportunistically or use plain
3620 SSL, depending on your needs. For debugging, set `gnutls-log-level'
3623 *** New primitive `secure-hash' that supports many secure hash algorithms:
3624 md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3625 sha1.el has been removed. The `sha1' feature is provided by default.
3629 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3631 ** Progress reporters can now "spin".
3632 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3633 now be nil, or omitted. This makes a "non-numeric" reporter. Each
3634 time you call `progress-reporter-update' on that progress reporter,
3635 with a nil or omitted VALUE argument, the reporter message is
3636 displayed with a "spinning bar".
3638 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
3639 being reverted, even if the buffer has a local `revert-buffer-function'.
3641 ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3642 If delayed-warnings-list is non-nil, the command loop calls
3643 `delayed-warnings-hook' after `post-command-hook'. At present, this
3644 is only used by Emacs on some platforms to display warnings during
3645 startup, which might otherwise not be noticed. This uses the
3646 functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3648 ** rx.el has a new `group-n' construct for explicitly numbered groups.
3650 ** New function `make-composed-keymap' that constructs a new keymap
3651 from multiple input maps. You can use this to make a keymap that
3652 inherits from multiple maps, eg:
3653 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3655 ** New function `string-prefix-p'.
3656 (This was actually added in Emacs 23.2 but was not advertised at the time.)
3658 ** New reader macro ## that stands for the empty symbol.
3659 This means that the empty symbol can now be read back. Also, #: by itself
3660 (when not immediately followed by a possible symbol character) stands for
3661 an empty uninterned symbol.
3663 ** New math functions `isnan', `copysign', `frexp', `ldexp'.
3665 ** The following functions and variables are obsolete:
3667 *** `tooltip-use-echo-area' is obsolete.
3668 Rather than setting this to t, disable Tooltip mode instead.
3670 *** buffer-substring-filters is obsolete.
3671 Use `filter-buffer-substring-functions' instead.
3673 *** `byte-compile-disable-print-circle' is obsolete.
3675 *** `deferred-action-list' and `deferred-action-function' are obsolete.
3676 Use `post-command-hook' instead.
3678 *** `font-lock-maximum-size' is obsolete.
3681 * Changes in Emacs 24.1 on Non-Free Operating Systems
3683 ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3684 and also when HOME is set to C:\ by default.
3686 ** New configure.bat options
3688 *** --enable-checking builds Emacs with extra runtime checks.
3690 *** --distfiles specifies files to be included in binary distribution.
3692 *** --without-gnutls disables automatic GnuTLS detection.
3694 *** --lib for general library linkage, works with the USER_LIBS build variable.
3696 ** New make target `dist' to create binary distribution for MS Windows.
3698 ** The Lisp function `w32-default-color-map' is now obsolete.
3699 (It is only used internally in the Emacs C code.)
3701 ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3702 reappear on mouse-over. (Requires OS X 10.6 or later.)
3704 ** On Mac OS X, dragging a file into Emacs visits the file, like on
3705 other platforms, rather than inserting its contents into the buffer.
3708 ----------------------------------------------------------------------
3709 This file is part of GNU Emacs.
3711 GNU Emacs is free software: you can redistribute it and/or modify
3712 it under the terms of the GNU General Public License as published by
3713 the Free Software Foundation, either version 3 of the License, or
3714 (at your option) any later version.
3716 GNU Emacs is distributed in the hope that it will be useful,
3717 but WITHOUT ANY WARRANTY; without even the implied warranty of
3718 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3719 GNU General Public License for more details.
3721 You should have received a copy of the GNU General Public License
3722 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3727 paragraph-separate: "[
\f]*$"